CN219306601U

CN219306601U - Air duct switch assembly for dust collector and dust collector

Info

Publication number: CN219306601U
Application number: CN202320397359.1U
Authority: CN
Inventors: 戴雄; 夏亮; 李迎亮; 刘海平
Original assignee: Suzhou Cleva Electric Appliance Co Ltd
Current assignee: Suzhou Cleva Electric Appliance Co Ltd
Priority date: 2023-03-06
Filing date: 2023-03-06
Publication date: 2023-07-07
Anticipated expiration: 2033-03-06

Abstract

The utility model discloses an air duct switch assembly for a dust collector and the dust collector, and belongs to the technical field of dust collectors. The vacuum cleaner comprises a barrel component and a machine head component, wherein a negative pressure accommodating space is formed in the barrel component, negative pressure is generated in the negative pressure accommodating space in the working state of the vacuum cleaner, a first opening leading to the negative pressure accommodating space is formed in the machine head component, the air duct switch component is used for blocking the first opening in a first state, the first opening is opened in a second state so that external air flow is sucked into the first opening, a second opening leading to the negative pressure accommodating space is formed in the machine head component, and the air duct switch component is used for blocking the second opening in the first state; in the second state, the air duct switch assembly opens the second opening, so that the requirement on the force required for opening the first opening is reduced, and the use difficulty is reduced.

Description

Air duct switch assembly for dust collector and dust collector

Technical Field

The utility model relates to the field of dust collectors, in particular to an air duct switch assembly for a dust collector and the dust collector.

Background

The dust collector comprises a motor and an air duct structure, when dust is collected, the motor rotates at a high speed to form a vacuum channel, so that generated high-speed airflow sucks garbage from an air inlet, the garbage and the dust are removed through a filter, and the processed airflow is discharged from an air outlet. The common air duct structure, its switch structure, like turning over the board in automatically cleaning wind channel or air supplementing wind channel, during operation opens and turns over the board, and air inlet in air duct structure gives the dust catcher assigned position and admits air, if carry out self-cleaning to the filter, avoid the filter to be plugged up, guarantee that the air current discharges smoothly when the dust absorption, improved product reliability.

In the air duct structure of the existing dust collector, the turning plate can be opened only by overcoming the negative pressure of the whole dust collector, the required opening force is relatively large, and the use difficulty is increased. When the turning plate is opened by adopting a manual mode, the hand feeling experience is poor. When the turning plate is opened in an automatic mode, the automatic self-cleaning structure needs to be selected with larger power due to larger opening force, the cost is higher, and the service life of the air duct structure is greatly influenced.

Disclosure of Invention

The utility model aims to provide an air duct switch assembly for a dust collector and the dust collector, which reduce the force requirement of opening an opening corresponding to a turning plate of the existing air duct structure and reduce the use difficulty.

To achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides an air duct switch assembly for dust catcher, the dust catcher includes bucket subassembly and aircraft nose subassembly, form negative pressure accommodation space in the bucket subassembly, negative pressure accommodation space produces the negative pressure under the operational condition of dust catcher, the aircraft nose is equipped with on the subassembly and opens to the first opening of negative pressure accommodation space, the air duct switch assembly is in the first state shutoff first opening, open in the second state first opening so that external air current is inhaled first opening, the aircraft nose is equipped with still on the subassembly and opens to the second opening of negative pressure accommodation space, in the first state, the air duct switch assembly shutoff second opening; in the second state, the air duct switch assembly opens the second opening.

In some possible embodiments, the air duct switch assembly includes a switch including a first blocking portion and a second blocking portion, wherein the first blocking portion is located at an outer side of the negative pressure accommodating space, the second blocking portion is located at an inner side of the negative pressure accommodating space, and the first blocking portion and the second blocking portion are arranged in a linkage manner, so that in the first state, the first blocking portion blocks the first opening from the outer side of the negative pressure accommodating space, and the second blocking portion blocks the second opening from the inner side of the negative pressure accommodating space.

In some possible embodiments, the switch further includes an operation portion, where the operation portion is disposed in linkage with the second blocking portion, so that in the second state, the second blocking portion opens the second opening from the inner side of the negative pressure accommodating space and drives the first blocking portion to open the first opening from the outer side of the negative pressure accommodating space under the combined action of an operation force applied to the operation portion and a force generated by the negative pressure of the negative pressure accommodating space.

In some possible embodiments, the opening area size of the first opening is S1, and the opening area size of the second opening is S2, where S1> S2.

In some possible embodiments, the handpiece assembly further includes a lower cover, the first opening is located on the lower cover, the air duct switch assembly is rotatably located on the lower cover, and the second opening is located on the lower cover.

In some possible embodiments, the switch further comprises a connecting rod, the second blocking portion is connected with the connecting rod, the connecting rod at least partially penetrates through the second opening, and the second blocking portion is linked with the operating portion through the connecting rod.

In some possible embodiments, the other side of the lower cover is convexly provided with a protrusion, the first opening is located on the protrusion, in the normal state of the dust collector, the first opening is higher than the second opening, and in the first state, the first blocking part is abutted on the protrusion.

In some possible embodiments, the switch is rotatably connected to the lower cover through a rotation shaft, and the air duct switch assembly further includes an elastic member connecting the switch and the lower cover.

In some possible embodiments, the switch and the connecting rod are of a unitary structure, or the switch and the connecting rod are of a split structure.

In some possible embodiments, at least one seal is further included for sealing the second opening and/or for sealing the first opening.

On the other hand, the utility model also provides a dust collector, which comprises the air duct switch assembly for the dust collector.

In some possible embodiments, the vacuum cleaner further comprises a first airflow channel and a second airflow channel spaced apart from the first airflow channel, the first opening being in communication with the negative pressure receiving space through the first airflow channel, the second opening being in communication with the negative pressure receiving space through the second airflow channel.

In some possible embodiments, the vacuum cleaner further comprises an airflow channel, and the first opening and the second opening are both in communication with the negative pressure receiving space through the airflow channel.

The utility model has the beneficial effects that:

according to the air duct switch assembly for the dust collector and the dust collector, when the first opening is required to be opened, the second opening is simultaneously opened, in the opening process, the second opening and the first opening are communicated with the negative pressure accommodating space, and due to the fact that negative pressure exists in the negative pressure accommodating space, the air duct switch assembly is enabled to obtain suction force by pressure difference, and therefore operation force required for opening the first opening is relieved.

Drawings

FIG. 1 is a schematic illustration of a switch provided in accordance with an embodiment of the present utility model disposed on a handpiece assembly;

FIG. 2 is a cross-sectional view of a handpiece assembly in an unopened switch state provided in accordance with an embodiment of the present utility model;

FIG. 3 is one of the enlarged views at A of FIG. 2;

FIG. 4 is a second enlarged view of FIG. 2 at A;

FIG. 5 is a cross-sectional view of a handpiece assembly in an open switch state provided by an embodiment of the present utility model;

FIG. 6 is a schematic diagram of a switch and force release assembly provided in accordance with an embodiment of the present utility model;

FIG. 7 is a front view of a switch and force release assembly provided in accordance with an embodiment of the present utility model;

FIG. 8 is a schematic illustration of another switch provided in an unopened state according to an embodiment of the present utility model;

fig. 9 is a schematic diagram of another switch provided in an embodiment of the present utility model in an open state.

In the figure:

100. a handpiece assembly; 200. a barrel assembly;

1. a lower cover; 11. a first airflow passage; 12. a first opening; 13. a second opening; 14. a protrusion; 15. a second airflow passage;

2. a force release assembly; 21. a baffle; 22. a connecting rod;

3. a switch; 31. a rotating shaft; 32. an operation unit; 33. a guide post;

4. an elastic member;

5. and a seal.

Detailed Description

In order to make the technical problems solved by the present utility model, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The embodiment provides an air duct switch assembly for a dust collector, as shown in fig. 1-5, including a barrel assembly 200 and a machine head assembly 100, wherein a negative pressure accommodating space is formed in the barrel assembly 200, the negative pressure accommodating space generates negative pressure in the working state of the dust collector, a first opening 12 and a second opening 13 are formed in the machine head assembly 100, and the first opening 12 and the second opening 13 are communicated with the negative pressure accommodating space. The vacuum cleaner further comprises an air duct switch assembly for the vacuum cleaner, which in a first state closes the first opening 12 while closing the second opening 13, and in a second state opens the first opening 12 while opening the second opening 13. The first state is a state in which the air duct switch assembly well seals both the first opening 12 and the second opening 13. The second state is to open the first opening 12 to the outside, and in the presence of the negative pressure accommodating space, the outside air flow is sucked into the first opening 12 and is led to the position of the air flow required by the dust collector, for example, in a self-cleaning mode, the air flow is led to the filtering device, the cleaning of the filtering device is finished through the outside air flow, and for example, in an air supplementing mode, the air supplementing requirement is finished through the outside air flow sucked into the motor air inlet side of the dust collector.

Further, the air duct switch assembly comprises a switch 3, the switch 3 comprises a first blocking portion and a second blocking portion, wherein the first blocking portion is located on the outer side of the negative pressure accommodating space, and the second blocking portion is located on the inner side of the negative pressure accommodating space. The first blocking portion and the second blocking portion are arranged in a linkage manner so as to realize that in the first state, the first blocking portion blocks the first opening 12 from the outer side of the negative pressure accommodating space, and the second blocking portion blocks the second opening 13 from the inner side of the negative pressure accommodating space.

Further, the switch 3 further includes an operation portion 32, where the operation portion 32 is disposed on a side of the switch 3 facing away from the second blocking portion, and the operation portion 32 is in linkage with the second blocking portion, that is, the operation portion 32 may drive the second blocking portion to move, or the second blocking portion drives the operation portion 32 to move, so that in the second state, the second blocking portion opens the second opening 13 from the inner side of the negative pressure accommodating space and drives the first blocking portion to open the first opening 12 from the outer side of the negative pressure accommodating space under the combined action of the operation force applied to the operation portion 32 and the acting force generated by the negative pressure of the negative pressure accommodating space. Preferably, the operation portion 32 is arc-shaped.

Specifically, in the first state, both the first opening 12 and the second opening 13 are blocked. When the switch 3 needs to be opened, the second opening 13 and the first opening 12 are simultaneously opened, and in the opening process, the second opening 13 and the first opening 12 are communicated with the negative pressure accommodating space, and as the negative pressure accommodating space has negative pressure, the pressure difference enables the air duct switch assembly to obtain suction force, so that the pressing force required for opening the switch 3 is relieved. Thus, the second opening 13 acts to reduce the force required to turn the air duct switch assembly from the first state to the second state.

In one embodiment, the opening area of the first opening 12 is S1 and the opening area of the second opening 13 is S2, where S1> S2 prevents the second opening 13 from being biased due to the suction force being greater than the suction force being applied at the first opening 12.

In one embodiment, as shown in fig. 3 and 6, the air duct switch assembly further comprises a force release assembly 2, the force release assembly 2 is located at the other end of the switch 3, the air duct switch assembly is used for blocking or opening the second opening 13 through the force release assembly 2, and the air duct switch assembly is used for blocking or opening the first opening 12 through the switch 3. When the first opening 12 and the second opening 13 are staggered, the switch 3 and the force release assembly 2 are respectively arranged so as to facilitate the structural layout.

Specifically, as shown in fig. 4, the negative pressure suction torque applied to the switch 3 is T1, and the negative pressure suction torque applied to the force release assembly 2 is T2, where T1 > T2. In a state where no external force acts on the switch 3, such as in a dust suction state, since the negative pressure accommodating space itself has a negative pressure, both the switch 3 and the first and second blocking portions connected to the switch 3 are subjected to suction force due to a pressure difference, and simultaneously the first and

second openings

12 and 13 are blocked. In the state that external force acts on the switch 3, such as a self-cleaning state, the torque generated by the external force is T3, T3 is more than T1-T2, and the labor-saving force is T2. Compared with the prior art that the switch 3 is opened by external force, the external force generates torque T, T is more than T1, and T3 is less than T, namely the switch 3 is opened by smaller force in the scheme. Therefore, through setting up the second shutoff portion, reduced the requirement of opening the power of switch 3, reduced the use degree of difficulty, can effectively improve customer's use experience and promote performances such as life of complete machine.

As shown in fig. 3, the handpiece assembly 100 further includes a lower cover 1, and the lower cover 1 may be a separate cover provided below the handpiece assembly 100 or may be integrally formed with the handpiece assembly 100. In an embodiment, the first opening 12 and the second opening 13 are both located on the lower cover 1, and the air duct switch assembly is rotatably disposed on the lower cover 1, in an embodiment, the air duct switch assembly is disposed on a side facing away from the tub assembly 200, and the first opening 12 and the second opening 13 can be simultaneously opened or plugged by rotating the air duct switch assembly, so that the operation is convenient. In other embodiments, the handpiece assembly 100 can further include a housing, and the second opening 13 can also be formed in the housing, without limitation.

In one embodiment, the first blocking portion and the second blocking portion may be located on opposite sides of the switch 3, the first blocking portion being a part of the structure of the switch 3, and blocking and opening the first opening 12 are achieved by using one end of the switch 3 as the first blocking portion. In yet another embodiment, the switch 3 further comprises a connecting rod 22, wherein the connecting position of the connecting rod 22 on the switch 3 is close to the operating portion 32, and herein close means that the distance between the connecting rod 22 and the operating portion 32 is smaller than the distance between the connecting rod 22 and the first blocking portion in the horizontal direction. The connecting rod 22 and the second blocking part form a force release assembly 2, when the force release assembly 2 is arranged, the second blocking part is in the structural form of the baffle 21, namely, the force release assembly 2 comprises the baffle 21 and the connecting rod 22, and the baffle 21 can be in any shape capable of blocking the second opening 13, and is not limited herein. The baffle 21 is connected with the connecting rod 22, that is, the second blocking portion is connected with the connecting rod 22, and the connecting rod 22 at least partially penetrates through the second opening 13, so that linkage of the second blocking portion and the operating portion 32 is realized through connection of the connecting rod 22, and linkage arrangement of the first blocking portion and the second blocking portion on the switch 3 is further realized. The force release assembly 2 closes or opens the second opening 13 by means of a shutter 21, in particular the length of the connecting rod 22 being set according to the height between the first opening 12 and the second opening 13.

In one embodiment, the switch 3 and the connecting rod 22 are integrally formed, or the switch 3 and the connecting rod 22 are separately formed, such as the connecting rod 22 is connected to the switch 3 by a fastener. In yet another embodiment, the connecting rod 22 and the second connecting portion (i.e. the baffle 21) are of an integral structure, or the connecting rod 22 and the second connecting portion are of a separate structure, and are connected by an existing connecting structure. The connection conditions of the above components are specifically set according to actual conditions, and are not limited.

In one embodiment, as shown in fig. 3, the other side of the lower cover 1 is convexly provided with a protrusion 14, the first opening 12 is located on the protrusion 14, in the normal state of the cleaner, the first opening 12 is higher than the second opening 13, and in the first state, one end or the first blocking part of the switch 3 abuts against the protrusion 14. The switch 3 is conveniently rotated by providing the protrusions 14 to provide a height difference between the positions of the first opening 12 and the second opening 13. Specifically, the length of the connecting rod 22 may be set according to the height of the protrusion 14 to satisfy that the switch 3 is in a balanced state to block the first opening 12 and the second opening 13, respectively.

Specifically, the cross-sectional area of the baffle 21 is larger than the opening area of the second opening 13, ensuring that the baffle 21 is sufficient to block the second opening 13, improving reliability. In an embodiment, at least one sealing member 5 is further included, the sealing member 5 being used for sealing the second opening 13, and/or the sealing member being used for sealing the first opening 12, improving the sealing reliability, and further the sealing member 5 being a sealing ring.

In one embodiment, as shown in fig. 3, the air duct switch assembly for the cleaner further includes an elastic member 4, and the elastic member 4 may have an elastic structure such as a spring. The air duct switch assembly is rotatably arranged on the lower cover 1 through the elastic piece 4, and is particularly arranged on one side, opposite to the barrel assembly 200, of the lower cover 1, if the switch 3 is connected to the lower cover 1 through a spring, when the air duct switch assembly or the switch 3 is applied with force to enable the air duct switch assembly to rotate, the elastic piece 4 is deformed, the switch 3 is enabled to rotate, the air duct switch assembly is enabled to rotate from a first state to a second state, and when the applied force disappears, the elastic force of resetting through the elastic piece 4 enables the air duct switch assembly to be better restored to the first state. In another embodiment, the switch 3 is rotatably connected to the lower cover 1 through the rotation shaft 31, the switch 3 and the lower cover 1 on the air duct switch assembly are further connected with an elastic member 4, for example, the switch 3 is rotatably connected to the lower cover 1 through the rotation shaft 31, meanwhile, the elastic member 4 is connected between the lower cover 1 and the switch 3, when a force is applied to the air duct switch assembly or the switch 3 to rotate the air duct switch assembly, the switch 3 rotates through the structure of the rotation shaft 31, the elastic member 4 deforms, the switch 3 rotates, the air duct switch assembly changes from a first state to a second state, and when the applied force is eliminated, the air duct switch assembly is better restored to the first state through the elastic force of the reset of the elastic member 4. In other embodiments, in the above rotation process, the rotation of the switch 3 drives the force release assembly 2 to rotate, further drives the baffle 21 to rotate, and realizes the blocking and opening of the first opening 12 and the second opening 13 through the position change of the switch 3 and the baffle 21 before and after rotation, that is, the air duct switch assembly is mutually converted between the first state and the second state, so as to realize the linkage setting of the first blocking portion and the second blocking portion. Further, the switch 3 is provided with a guide post 33, and the spring is sleeved on the guide post 33.

In another embodiment, when the first opening 12 and the second opening 13 are disposed facing each other, the first opening 12 and the second opening 13 may be blocked or opened only by the switch 3.

As shown in fig. 4 and 7, the rotating shaft 31 between the lower cover 1 and the switch 3 forms a rotating fulcrum, in one embodiment, the distance between the first opening 12 and the rotating shaft 31 is L1, the distance between the second opening 13 and the rotating shaft 31 is L2, and when L2 > L1, the distance between the second opening 13 and the rotating shaft 31 is increased during opening, so that the moment arm is increased and the acting force is reduced under the condition that the same external force torque is generated. When l2=l1 or L1> L2, the force should be appropriately increased due to the decrease in the moment arm.

Specifically, as shown in fig. 1, two switches 3 are disposed on the head assembly 100, as shown in fig. 2 and 5, a self-cleaning operation assembly is disposed on the head assembly 100, the first opening 12 is a self-cleaning air duct inlet, and the switches 3 are self-cleaning switches, wherein the self-cleaning operation assembly is in the prior art and will not be described again. Specifically, as shown in fig. 8 and 9, the air supply assembly is disposed on the handpiece assembly 100, the air supply duct inlet of the first opening 12 may also be a switch for supplying air to a specific chamber, where the air supply assembly is in the prior art and will not be described again. In other embodiments, a plurality of switches 3 may be provided, and the present utility model is not limited thereto. In summary, the present utility model aims to provide an effective force release assembly 2 to assist in the opening and closing of the switch 3 structure to increase its lifetime and enhance the user's experience in using it.

The utility model also provides a dust collector, which comprises the air duct switch assembly, and the force required to be applied for opening the opening of the air duct structure is reduced by arranging the air duct switch assembly, so that the energy consumption is reduced, the opening is easy, and the user experience is improved.

In one embodiment, as shown in fig. 3, the vacuum cleaner further includes a first airflow channel 11 and a second airflow channel 15 spaced apart from the first airflow channel 11, specifically, the first opening 12 communicates with the negative pressure accommodating space through the first airflow channel 11, the second opening 13 communicates with the negative pressure accommodating space through the second airflow channel 15, and the inner walls of the channel structures of the first airflow channel 11 and the second airflow channel 15 are opened from the inside of the structure of the lower cover 1. In other embodiments, the first airflow channel 11, the second airflow channel 15 and the negative pressure accommodating space are communicated or separated, and are specifically set according to the internal structural requirement of the vacuum cleaner, without limitation. In yet another embodiment, the cleaner further includes an air flow passage formed by the structure of the lower cover 1, through which the first opening 12 and the second opening 13 are both communicated with the negative pressure receiving space, and the air flow passage may be formed by the communication of the first air flow passage 11 and the second air flow passage 15.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. An air duct switch assembly for a dust collector comprises a barrel assembly and a machine head assembly, wherein a negative pressure accommodating space is formed in the barrel assembly, negative pressure is generated in the negative pressure accommodating space in the working state of the dust collector, a first opening leading to the negative pressure accommodating space is formed in the machine head assembly, the air duct switch assembly is used for blocking the first opening in the first state and opening the first opening in the second state so that external airflow is sucked into the first opening, the dust collector is characterized in that a second opening leading to the negative pressure accommodating space is formed in the machine head assembly,

in the first state, the air duct switch assembly seals the second opening;

in the second state, the air duct switch assembly opens the second opening.

2. The air duct switch assembly for a vacuum cleaner according to claim 1, comprising a switch including a first blocking portion and a second blocking portion, wherein the first blocking portion is located outside the negative pressure accommodation space, the second blocking portion is located inside the negative pressure accommodation space, and the first blocking portion and the second blocking portion are disposed in linkage such that in the first state, the first blocking portion blocks the first opening from outside the negative pressure accommodation space, and the second blocking portion blocks the second opening from inside the negative pressure accommodation space.

3. The air duct switch assembly for a vacuum cleaner according to claim 2, wherein the switch further comprises an operation portion that is provided in conjunction with the second blocking portion such that in the second state, the second blocking portion opens the second opening from the inside of the negative pressure accommodating space and drives the first blocking portion to open the first opening from the outside of the negative pressure accommodating space under the combined action of an operation force applied to the operation portion and a force generated by the negative pressure of the negative pressure accommodating space.

4. A duct switch assembly for a vacuum cleaner as claimed in claim 3, wherein the first opening has an opening area size S1 and the second opening has an opening area size S2, wherein S1> S2.

5. The air duct switch assembly for a vacuum cleaner of claim 4, wherein the head assembly further comprises a lower cover, the first opening is located on the lower cover, the air duct switch assembly is rotatably located on the lower cover, and the second opening is located on the lower cover.

6. The air duct switch assembly for a vacuum cleaner of claim 5, wherein the switch further includes a connecting rod, the second blocking portion is connected to the connecting rod, the connecting rod at least partially passes through the second opening, and the second blocking portion is coupled to the operating portion through the connecting rod.

7. The air duct switch assembly for a vacuum cleaner according to claim 5, wherein the other side of the lower cover is convexly provided with a protrusion, the first opening is located on the protrusion, the first opening is higher than the second opening in the normal state of the vacuum cleaner, and the first blocking portion abuts on the protrusion in the first state.

8. The air duct switch assembly for a vacuum cleaner according to claim 5, wherein the switch is rotatably coupled to the lower cover by a rotation shaft, and further comprising an elastic member connecting the switch and the lower cover.

9. The air duct switch assembly for a vacuum cleaner of claim 6, wherein the switch and the connecting rod are of a unitary structure, or wherein the switch and the connecting rod are of a split structure.

10. The air chute switch assembly for a vacuum cleaner as in any one of claims 1-9, further comprising at least one seal for sealing said second opening and/or for sealing said first opening.

11. A vacuum cleaner comprising the air duct switch assembly for a vacuum cleaner as claimed in any one of claims 1 to 10.

12. The vacuum cleaner of claim 11, further comprising a first airflow passage through which the first opening communicates with the negative pressure receiving space and a second airflow passage spaced apart from the first airflow passage through which the second opening communicates with the negative pressure receiving space.

13. The vacuum cleaner of claim 11, further comprising an airflow passage through which the first opening and the second opening each communicate with the negative pressure receiving space.