CN114593928A

CN114593928A - Dust collector testing equipment

Info

Publication number: CN114593928A
Application number: CN202210258070.1A
Authority: CN
Inventors: 雍君; 袁春立
Original assignee: Jiangsu Chuangyuan Electron Co Ltd
Current assignee: Jiangsu Chuangyuan Electron Co Ltd
Priority date: 2022-03-16
Filing date: 2022-03-16
Publication date: 2022-06-07

Abstract

The invention discloses a dust collector testing device, which belongs to the technical field of testing and comprises a rack, a positioning mechanism, a key pressing mechanism, a rolling brush testing mechanism, a suction port plugging mechanism and an indicator lamp detecting mechanism, wherein the rack is provided with a plurality of testing positions, and the positioning mechanism can fix a dust collector at the testing positions; the key pressing mechanism is used for pressing or releasing a key of the dust collector; the rolling brush testing mechanism is used for detecting the speed information of the rolling brush; the suction port plugging mechanism is used for plugging a suction port of the dust collector; the indicator light detection mechanism is used for detecting the state information of each indicator light. By arranging a plurality of test positions on the rack, all parts of the dust collector can be fixed at the same time, so that the whole machine can be positioned at one time to complete multiple detections, and the time is saved; the key pressing mechanism, the rolling brush testing mechanism, the suction port plugging mechanism and the indicator lamp testing mechanism are matched to detect the key condition, the speed information, the indicator lamp information and the suction port plugging condition of the dust collector, so that automatic testing is realized.

Description

Dust collector testing equipment

Technical Field

The invention relates to the technical field of testing, in particular to a testing device for a dust collector.

Background

Along with the continuous improvement of the living standard of people, the demand of the intelligent dust collector is also increasing. In the production process of the dust collector, the dust collector needs to be tested, and the test relates to many aspects including power button test, gear shifting lamp display test, working state display test and the like.

Because the dust collector has larger volume and more functions, the dust collector is generally divided into a plurality of parts in the prior art, such as a handle, a machine body and a working head, each part is independently tested, different detection equipment needs to be replaced, a product needs to be positioned for many times, and the detection is inconvenient. In addition, the manual testing is adopted, the process is complex, the labor is wasted, and the detection efficiency is low.

Disclosure of Invention

The invention aims to provide a testing device of a dust collector, which aims to solve the technical problem of low detection efficiency in the prior art.

As the conception, the technical scheme adopted by the invention is as follows:

a vacuum cleaner testing apparatus comprising:

the test device comprises a rack, a test device and a test device, wherein a plurality of test positions are arranged on the rack;

the positioning mechanism is arranged on the rack and can fix the dust collector on the test position;

the key pressing mechanism is used for pressing or releasing a key of the dust collector;

the rolling brush testing mechanism is used for detecting the speed information of the rolling brush;

the suction port plugging mechanism is used for plugging the suction port of the dust collector;

and the indicator light detection mechanism is used for detecting the state information of each indicator light.

The machine frame is provided with two testing positions, namely a first testing position and a second testing position, the handle of the dust collector is positioned at the first testing position, and the machine body and the working head of the dust collector are positioned at the second testing position; the dust collector test equipment further comprises a communication cable, and the communication cable can be connected with the handle in series and the communication interface of the machine body.

The testing position is provided with a limiting groove, the positioning mechanism comprises a positioning cylinder and a clamping jaw, the positioning cylinder is connected with the rack, and the positioning cylinder can drive the clamping jaw to tightly abut against the dust collector.

The key pressing mechanism comprises a pressing cylinder and a pressing head, the pressing cylinder is arranged on the rack, the pressing head is arranged at the output end of the pressing cylinder, one pressing cylinder is arranged corresponding to each key, and the pressing cylinder can drive the pressing head to press or release the key.

Wherein, round brush accredited testing organization includes:

the support is connected with the rack in a sliding manner;

the transmission shaft is rotatably arranged on the support;

the friction wheel is arranged on the transmission shaft and can be in contact with the rolling brush;

and the encoder is arranged on the transmission shaft and used for acquiring the speed parameter of the transmission shaft.

The rolling brush testing mechanism further comprises a braking assembly, and the braking assembly can selectively brake the transmission shaft.

The suction port plugging mechanism comprises a first plugging cylinder, a switching seat, a second plugging cylinder and a plug, the first plugging cylinder is arranged on the rack, the switching seat is arranged at the output end of the first plugging cylinder, the second plugging cylinder is arranged on the switching seat, and the plug is arranged at the output end of the second plugging cylinder.

The automatic charging device comprises a dust collector, and is characterized by further comprising a charging detection mechanism, wherein the charging detection mechanism comprises a plug wire cylinder, a movable plate and a charging wire, the movable plate is arranged at the output end of the plug wire cylinder, the charging wire is connected with the movable plate, and the plug wire cylinder can drive the movable plate to move so that the charging wire is inserted into a socket on the dust collector.

The charging detection mechanism further comprises an ammeter, the ammeter is connected with the charging wire, and the ammeter can detect current on the charging wire.

The indicating lamp detection mechanism comprises a camera, the camera is arranged on the rack and can acquire image information of the indicating lamp of the dust collector.

The invention has the beneficial effects that:

according to the dust collector testing equipment provided by the invention, the plurality of testing positions are arranged on the rack, so that each part of the dust collector can be fixed at the same time, the whole machine can be positioned at one time to complete multiple detections, and the time is saved; through the cooperation of button pressing mechanism, round brush accredited testing organization, suction inlet shutoff mechanism and pilot lamp detection mechanism, detect the button condition, the speed information of dust catcher, pilot lamp information and the suction inlet shutoff condition, realize automatic test, it is convenient high-efficient.

Drawings

FIG. 1 is a schematic structural diagram of a testing device of a vacuum cleaner provided in an embodiment of the present invention;

FIG. 2 is a schematic diagram of a portion of the structure of FIG. 1;

FIG. 3 is an enlarged view at A of FIG. 1;

FIG. 4 is an enlarged view at B of FIG. 1;

FIG. 5 is a front view of a part of the structure of a vacuum cleaner test apparatus according to an embodiment of the present invention;

fig. 6 is a side view of fig. 5.

In the figure:

101. a handle; 102. a body; 103. a working head; 104. a suction port; 105. pressing a key;

10. a frame; 11. a limiting groove;

20. a positioning mechanism; 21. positioning the air cylinder; 22. a clamping jaw;

30. a key pressing mechanism; 31. a pressing cylinder; 32. a pressing head;

40. a rolling brush testing mechanism; 41. a support; 42. a drive shaft; 43. a friction wheel; 44. an encoder; 45. a brake pad; 46. a friction member; 47. a transmission assembly;

50. a suction port plugging mechanism; 51. a first plugging cylinder; 52. a transfer seat; 53. a second plugging cylinder; 54. a plug;

60. an indicator light detection mechanism; 61. a camera; 62. a card holder;

70. a charging detection mechanism; 71. a wire plugging cylinder; 72. moving the plate; 73. and (6) charging wires.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present invention and should not be construed as limiting the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Referring to fig. 1 to 6, an embodiment of the present invention provides a vacuum cleaner testing apparatus, which is mainly used for testing a vacuum cleaner. The vacuum cleaner testing device comprises a frame 10, and a positioning mechanism 20, a key pressing mechanism 30, a rolling brush testing mechanism 40, a suction port plugging mechanism 50, an indicator light detecting mechanism 60 and a charging detecting mechanism 70 which are arranged on the frame 10, and are described in detail below.

The frame 10 plays a supporting role, and a plurality of test positions are arranged on the frame 10, so that all parts of the dust collector can be fixed at the same time, the whole machine can be positioned at one time to complete multiple detections, and the time is saved.

Specifically, the vacuum cleaner comprises a handle 101, a body 102 and a working head 103, wherein in the embodiment, the handle 101 is detached from the body 102, the body 102 and the working head 103 are taken as a part, and the handle 101 is taken as a part.

The frame 10 is provided with two test positions, namely a first test position and a second test position, wherein a handle 101 of the dust collector is positioned at the first test position, and a machine body 102 and a working head 103 of the dust collector are positioned at the second test position; the vacuum cleaner testing apparatus further comprises a communication cable which can be connected in series with the communication interfaces of the handle 101 and the body 102.

Specifically, the first test position is located at the upper part of the frame 10 and is arranged along the transverse direction, the second test position is located at the side part of the frame 10 and is arranged along the longitudinal direction, the space is fully utilized, the positioning direction of the machine body 102 and the working head 103 is the same as the direction in actual work, and the real working scene of the dust collector is conveniently restored.

The positioning mechanism 20 is capable of securing the cleaner in a test position.

Specifically, the test position is provided with spacing groove 11, and positioning mechanism 20 is connected with frame 10 including location cylinder 21 and clamping jaw 22, and location cylinder 21 can drive clamping jaw 22 and support the dust catcher tightly. Wherein, the spacing groove 11 plays the prepositioning effect to the dust catcher, and clamping jaw 22 plays the fixed action to the dust catcher.

Here, the number of the positioning cylinders 21 is not limited, and may be set according to the size and shape of the cleaner.

The indicator light detection means 60 detects status information of each indicator light.

The indicator light detection mechanism 60 includes a camera 61, the camera 61 is disposed on the frame 10, and the camera 61 can collect image information of the indicator light of the vacuum cleaner. The number of cameras 61 is not limited and may be set according to the distribution of the respective indicator lights.

Specifically, the frame 10 is provided with a clamping seat 62, and the camera 61 is clamped with the clamping seat 62, so that the mounting and dismounting are convenient.

Each indicator lamp comprises a charging indicator lamp, a starting indicator lamp and a rotating speed indicator lamp. The charging indicator light, the starting indicator light and the rotating speed indicator light can be one indicator light.

The button pressing mechanism 30 is used to press or release a button 105 of the cleaner.

The key pressing mechanism 30 includes a pressing cylinder 31 and a pressing head 32, the pressing cylinder 31 is disposed on the frame 10, the pressing head 32 is disposed at an output end of the pressing cylinder 31, one pressing cylinder 31 is disposed corresponding to each key 105, and the pressing cylinder 31 can drive the pressing head 32 to press or release the key 105.

In the present embodiment, two push cylinders 31 are provided, one push cylinder 31 corresponding to the power-on key, and the other push cylinder 31 corresponding to the speed-adjusting key. The pressing head 32 is driven to move by the pressing cylinder 31 corresponding to the start-up key, so that the start-up key of the dust collector is pressed by the pressing head 32, and then the start-up key is released, so that the dust collector is started.

Specifically, a mounting plate is provided on the frame 10, and both the pressing cylinders 31 are provided on the mounting plate.

The key depression mechanism 30 has a fitting relationship with the indicator light detection mechanism 60. Specifically, after the key pressing mechanism 30 presses and releases the power-on key, the power-on indicator lights are turned on, and the image information obtained by the camera 61 can be used to determine whether the power-on state is normal. After the speed-adjusting key is pressed and released by the key-press mechanism 30, the rotation speed indicator lamp is turned on, and whether the rotation speed is normal or not can be judged through image information obtained by the camera 61.

The rolling brush testing mechanism 40 is used for detecting speed information of the rolling brush.

The rolling brush testing mechanism 40 includes a holder 41, a transmission shaft 42, a friction wheel 43, and an encoder 44. The support 41 is connected with the frame 10 in a sliding way, and the position of the support 41 can be adjusted, so that the friction wheel 43 is driven to be in contact with or separated from the rolling brush conveniently; the transmission shaft 42 is rotatably arranged on the support 41; the friction wheel 43 is arranged on the transmission shaft 42, and the friction wheel 43 can be in contact with the rolling brush; the encoder 44 is disposed on the transmission shaft 42 and is used for acquiring a speed parameter of the transmission shaft 42.

When the rolling brush rotates, the friction wheel 43 contacts with the rolling brush, the rolling brush drives the friction wheel 43 to rotate, the transmission shaft 42 is further enabled to rotate, the encoder 44 rotates along with the transmission shaft 42, and then the speed parameter of the transmission shaft 42 can be obtained. The encoder 44 is of a conventional structure and corresponds to a speed sensor or a rotational speed detector.

The encoder 44 can obtain the magnitude and direction of the rotation speed, and then judge whether the rotation speed of the rolling brush is normal.

When the dust collector is used, if more hairs are wound on the rolling brush, the rolling brush can be blocked and rotate, and the dust collector should send alarm information to prevent the motor from being damaged due to overhigh temperature. To test whether the function is normal, the rolling brush test mechanism 40 further includes a brake assembly that selectively brakes the drive shaft 42.

When the brake assembly brakes the transmission shaft 42, the transmission shaft 42 is stopped and the friction wheel 43 is stopped, and at this time, the friction force between the friction wheel 43 and the roller brush is sharply increased, and the friction force stops the roller brush. At this time, it can be judged from the image information obtained by the camera 61 that the cleaner can react to the locked rotation. If the rotating speed indicating lamp is changed from green to yellow, the detection is qualified, and if the rotating speed indicating lamp is always green, the detection is unqualified.

Specifically, the brake assembly includes a driven shaft, a brake block 45 and a friction piece 46, the driven shaft is disposed on the support 41 and connected with the transmission shaft 42 through a transmission assembly 47, the brake block 45 is disposed on the driven shaft, the friction piece 46 is disposed on one side of the brake block 45, an opening is disposed on the friction piece 46, and a part of the brake block 45 is inserted into the opening.

During the rotation of the transmission shaft 42, the driven shaft is driven to rotate through the transmission assembly 47, and the brake plate 45 rotates along with the rotation. The friction member 46 can apply a frictional force to the brake pad 45 to stop the brake pad 45, and thus the transmission shaft 42, the friction wheel 43 and the roller brush.

In this embodiment, the transmission assembly 47 is a belt transmission assembly, and includes two belt pulleys and a belt wound around the two belt pulleys.

The rolling brush testing mechanism 40 further comprises a first shifting cylinder, an adapter plate and a second shifting cylinder, wherein the first shifting cylinder is arranged on the rack 10, the adapter plate is arranged at the output end of the first shifting cylinder, the second shifting cylinder is arranged on the adapter plate, and the support 41 is arranged at the output end of the second shifting cylinder. The friction wheel 43 is brought into contact with or separated from the roll brush by moving the holder 41.

The suction port plugging mechanism 50 comprises a first plugging cylinder 51, an adapter 52, a second plugging cylinder 53 and a plug 54, the first plugging cylinder 51 is arranged on the frame 10, the adapter 52 is arranged at the output end of the first plugging cylinder 51, the second plugging cylinder 53 is arranged on the adapter 52, and the plug 54 is arranged at the output end of the second plugging cylinder 53. The plug 54 is moved to abut against or separate from the suction port 104.

The plug 54 may be a rubber member, which has a certain elasticity and is convenient for tightly sealing the suction opening 104.

The charging detection mechanism 70 is used to detect a charging parameter.

The charging detection mechanism 70 comprises a plug wire cylinder 71, a moving plate 72 and a charging wire 73, the moving plate 72 is arranged at the output end of the plug wire cylinder 71, the charging wire 73 is connected with the moving plate 72, and the plug wire cylinder 71 can drive the moving plate 72 to move so that the charging wire 73 can be inserted into a socket on the dust collector. The other end of the charging wire 73 is connected with an external power supply, and the dust collector can be charged. It is possible to determine whether the cleaner is normally charged based on the image information obtained by the camera 61. If the charging indicator light is a green light, normal charging is indicated.

The charging wire 73 is connected with an ammeter, and in the charging process, the current on the charging wire 73 is detected.

The dust collector testing equipment further comprises a machine shell, the machine shell is covered outside the machine frame 10, a display screen, a control module and a power supply module are arranged on the machine shell, the power supply module can supply power for all parts, the control module can control the start and stop of all the parts, and detected information can be fed back to the display screen.

If the detection is qualified, qualified information is displayed; if one detection item is unqualified, an alarm device is triggered, so that the staff can conveniently and timely handle the detection item.

When the testing equipment for the dust collector is used, the testing equipment comprises the following steps:

first, the cleaner is fixed to the frame 10.

Specifically, the vacuum cleaner is divided into two parts, the handle 101 is taken as one part, the machine body 102 and the working head 103 are taken as one part, and the two parts are connected through a communication cable so as to ensure the whole functions of the vacuum cleaner.

The handle 101 is arranged in the limiting groove 11 of the first test position, and the clamping jaw 22 is driven by the positioning cylinder 21 to abut against the handle 101. The machine body 102 and the working head 103 are arranged in the limiting groove 11 of the second testing position, and the clamping jaw 22 is driven by the positioning cylinder 21 to tightly abut against the machine body 102 and the working head 103.

Next, in the vacuum cleaner off state, a test is performed using the charge detection mechanism 70.

Drive charging wire 73 through plug wire cylinder 71 and remove for charging wire 73 inserts the socket on the dust catcher, if the pilot lamp that charges is green lamp, shows normally charging, detects qualified. The charging current is detected by a current meter on the charging line 73. Under the normal condition of charging detection, the charging wire 73 is driven to move by the plug wire cylinder 71, so that the charging wire 73 is separated from the socket on the dust collector.

Next, other functions are tested.

The pressing head 32 is driven to move by the pressing cylinder 31 corresponding to the power-on key, so that the power-on key of the dust collector is pressed by the pressing head 32, then the power-on key is released, and if the power-on indicator light is a green light, the detection is qualified.

In the state that the dust collector is just started, the initial rotating speed is low. The camera 61 collects the image information of the rotating speed indicating lamp, and if the rotating speed indicating lamp is a green lamp, the detection is qualified. The speed parameter of the transmission shaft 42 is obtained by the encoder 44, so that the rotating speed and the direction of the rolling brush can be deduced, and whether the rolling brush rotates forwards or not and whether the rotating speed is a low-speed set value or not can be further judged.

In the low gear state of the dust collector, the transmission shaft 42 is braked by the brake assembly, and the rolling brush stops rotating at the moment, which can be judged by the information fed back by the encoder 44. And controlling the rolling brush to stop rotating and brake for a set time length, acquiring image information of the rotating speed indicator lamp through the camera 61, and if the rotating speed indicator lamp is a yellow lamp, indicating that the detection is qualified, and indicating that the rolling brush stops rotating.

When the dust collector is in a starting state, the dust collector is shut down and then started.

The pressing head 32 is driven to move by the pressing cylinder 31 corresponding to the start key, so that the start key of the dust collector is pressed by the pressing head 32, and then the start key is released, so that the dust collector is turned off. And repeating the operation to start the dust collector.

The pressing head 32 is driven to move by the pressing cylinder 31 corresponding to the speed regulation key, so that the speed regulation key of the dust collector is pressed by the pressing head 32, and then the speed regulation key is released, and the dust collector runs at a high-grade rotating speed. The camera 61 is used for collecting image information of the rotating speed indicating lamp, if the rotating speed indicating lamp is a green lamp, the detection is qualified, and the green lamp indicates that the rolling brush normally rotates. The speed parameter of the transmission shaft 42 is obtained through the encoder 44, so that the rotating speed of the rolling brush can be deduced, and whether the rotating speed of the rolling brush is a high-speed set value or not is judged.

The detection of the blockage of the suction port 104 is performed in a low rotation state of the vacuum cleaner or in a high rotation state of the vacuum cleaner.

The suction opening 104 of the dust collector is blocked by controlling the plug 54 through the suction opening blocking mechanism 50, the speed parameter of the transmission shaft 42 is obtained through the encoder 44, the rotating speed and the rotating direction of the roller brush can be deduced, and meanwhile, the image information of the rotating speed indicator lamp is collected through the camera 61. If the rolling brush stops rotating after intermittently rotating for two times and the rotating speed indicator lamp is a yellow lamp, the detection is qualified.

The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the invention, which changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A vacuum cleaner testing apparatus, comprising:

the test device comprises a rack (10), wherein a plurality of test positions are arranged on the rack (10);

the positioning mechanism (20) is arranged on the rack (10), and the positioning mechanism (20) can fix the dust collector at the test position;

a key pressing mechanism (30) for pressing or releasing a key (105) of the cleaner;

the rolling brush testing mechanism (40) is used for detecting the speed information of the rolling brush;

a suction port blocking mechanism (50) for blocking a suction port (104) of the dust collector;

and an indicator light detection means (60) for detecting status information of each indicator light.

2. The vacuum cleaner testing device according to claim 1, wherein the frame (10) is provided with two testing positions, namely a first testing position and a second testing position, the handle (101) of the vacuum cleaner is located at the first testing position, and the body (102) and the working head (103) of the vacuum cleaner are located at the second testing position; the dust collector testing equipment further comprises a communication cable, and the communication cable can be connected with the communication interfaces of the handle (101) and the machine body (102) in series.

3. The vacuum cleaner testing device according to claim 1, wherein the testing position is provided with a limiting groove (11), the positioning mechanism (20) comprises a positioning cylinder (21) and a clamping jaw (22), the positioning cylinder (21) is connected with the rack (10), and the positioning cylinder (21) can drive the clamping jaw (22) to abut against the vacuum cleaner.

4. The vacuum cleaner testing apparatus according to claim 1, wherein the key pressing mechanism (30) comprises a pressing cylinder (31) and a pressing head (32), the pressing cylinder (31) is disposed on the frame (10), the pressing head (32) is disposed at an output end of the pressing cylinder (31), one pressing cylinder (31) is disposed corresponding to each key (105), and the pressing cylinder (31) can drive the pressing head (32) to press or release the key (105).

5. The vacuum cleaner testing apparatus of claim 1, wherein the roll brush testing mechanism (40) comprises:

a support (41) which is connected with the frame (10) in a sliding way;

the transmission shaft (42) is rotatably arranged on the support (41);

a friction wheel (43) arranged on the transmission shaft (42), wherein the friction wheel (43) can be contacted with the rolling brush;

and the encoder (44) is arranged on the transmission shaft (42) and is used for acquiring the speed parameter of the transmission shaft (42).

6. The vacuum cleaner testing apparatus of claim 5, wherein the roll brush testing mechanism (40) further comprises a brake assembly that is capable of selectively braking the drive shaft (42).

7. The vacuum cleaner testing apparatus according to claim 1, wherein the suction port plugging mechanism (50) comprises a first plugging cylinder (51), an adapter (52), a second plugging cylinder (53), and a plug (54), the first plugging cylinder (51) is disposed on the frame (10), the adapter (52) is disposed at an output end of the first plugging cylinder (51), the second plugging cylinder (53) is disposed on the adapter (52), and the plug (54) is disposed at an output end of the second plugging cylinder (53).

8. The vacuum cleaner testing device according to claim 1, further comprising a charging detection mechanism (70), wherein the charging detection mechanism (70) comprises a plug wire cylinder (71), a moving plate (72) and a charging wire (73), the moving plate (72) is arranged at an output end of the plug wire cylinder (71), the charging wire (73) is connected with the moving plate (72), and the plug wire cylinder (71) can drive the moving plate (72) to move so that the charging wire (73) can be inserted into a socket on the vacuum cleaner.

9. The vacuum cleaner testing device according to claim 8, characterized in that the charging detection mechanism (70) further comprises a current meter connected with the charging wire (73), the current meter being capable of detecting the current on the charging wire (73).

10. Vacuum cleaner testing device according to any of claims 1-9, wherein the indicator light detection means (60) comprises a camera (61), the camera (61) being arranged on the chassis (10), the camera (61) being capable of capturing image information of the indicator light of the vacuum cleaner.