Handheld vacuum cleaner

Abstract

A handheld vacuum cleaner includes a dust cup and a filter body. An air inlet and an air outlet are formed on the dust cup. The filter body is disposed around the air outlet. The handheld vacuum cleaner further includes a closing mechanism. The closing mechanism is disposed at one end of the filter body away from the air outlet, and the air outlet, the air inlet, and the filter body are all located on the same side of the closing mechanism. When the handheld vacuum cleaner performs a vacuuming operation upward, the closing mechanism closes and forms a sealed space with the bottom of the dust cup, preventing the sealed space from communicating with the space where the filter body is located; when the handheld vacuum cleaner performs a vacuuming operation downward, the closing mechanism opens, and the bottom of the dust cup communicates with the space where the filter body is located. This handheld vacuum cleaner can perform a vacuuming operation upward without having to clean the dust cup in advance and without having to clean the dust cup multiple times during the working process.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum cleaners, and in particular to a handheld vacuum cleaner. Background Art

[0002] With the development of life, handheld vacuum cleaners have increasingly entered people's lives. Figure 1 FIG. is a schematic structural diagram of a handheld vacuum cleaner in a normal state in the prior art. Figure 2 FIG. is a schematic structural diagram of a handheld vacuum cleaner when tilted upward in the prior art. As Figure 1 and Figure 2 shown, in the prior art, a handheld vacuum cleaner generally includes an air inlet 91, a dust cup 92 and a filter 93. The air inlet 91 is in communication with the dust cup 92. An air outlet 94 is provided at the upper part of the dust cup 92. The filter 93 is arranged in the dust cup 92 and is disposed around the air outlet 94 in the dust cup 92. As Figure 1 shown, in the operation of sucking dust downward, that is, when the air inlet 91 of the dust cup 92 faces downward and the air outlet 94 faces upward, the dust sucked in from the air inlet 91 (see Figure 1 the small circles below, the same below), due to gravity, will accumulate at the bottom of the dust cup 92, and the air will be discharged from the air outlet 94 after passing through the filter 93.

[0003] However, as Figure 2 shown, when the handheld vacuum cleaner is in the operation of sucking dust upward to clean the dust at a high place, if the air inlet 91 is tilted upward and the air outlet 94 faces downward, due to gravity, the original dust in the dust cup 92 will fall around the filter 93, which will block the filter 93, affect air convection, reduce the suction of the vacuum cleaner, and increase the load on the motor. At the same time, in the case of small air convection, the motor of the vacuum cleaner cannot be cooled, shortening the life of the motor, and in severe cases, the motor will be burned out, causing a fire.

[0004] In order to avoid the above situation, the existing vacuum cleaner needs to clean the dust in the dust cup 92 before performing the operation of sucking dust upward, and during long-term operation or when there is a large amount of dust at a high place, the dust cup 92 needs to be cleaned multiple times during the use of the vacuum cleaner. Such an operation is complicated and has low efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a handheld vacuum cleaner that can perform the operation of sucking dust upward without prior cleaning of the dust cup and without multiple cleaning of the dust cup during the working process.

[0006] The present invention provides a handheld vacuum cleaner, which includes a dust cup and a filter body. An air inlet and an air outlet are formed on the dust cup. The filter body is disposed around the air outlet. The handheld vacuum cleaner further includes a closing mechanism, which is arranged at one end of the filter body away from the air outlet, and the air outlet, the air inlet and the filter body are all located on the same side of the closing mechanism. When the handheld vacuum cleaner performs a suction operation upward, the closing mechanism closes and forms a sealed space with the bottom of the dust cup, preventing the sealed space from communicating with the space where the filter body is located; when the handheld vacuum cleaner performs a suction operation downward, the closing mechanism opens, and the bottom of the dust cup communicates with the space where the filter body is located.

[0007] Further, the closing mechanism includes a stop ring and a stop baffle. The stop ring is circumferentially arranged on the inner side wall of the dust cup along the circumference of the dust cup and protrudes into the interior of the dust cup. The stop baffle is arranged at one end of the filter body away from the air outlet and can move up and down relative to the dust cup under the action of gravity. The stop baffle and the air outlet are respectively located on both sides of the stop ring. In a cross-section perpendicular to the axis of the dust cup, the diameter of the inner circle formed by the stop ring is smaller than the diameter of the stop baffle. When the handheld vacuum cleaner performs a suction operation downward, a gap is formed between the stop ring and the stop baffle. When the handheld vacuum cleaner performs a suction operation upward, the stop ring prevents the stop baffle from moving towards the air outlet, and the sealed space is formed by the stop ring, the stop baffle and the bottom of the dust cup.

[0008] Further, the closing mechanism further includes a first flexible film layer, which is connected between the stop baffle and the filter body.

[0009] Further, the stop baffle is annular. From the end close to the filter body to the end far from the filter body, the diameter of the first flexible film layer gradually increases. The sealed space is jointly formed by the stop baffle, the stop ring, the first flexible film layer and the bottom of the dust cup.

[0010] Further, the closing mechanism further includes a chute and a slide rail. One of the chute and the slide rail is arranged on the filter body, and the other of the chute and the slide rail is arranged on the dust cup. Under the action of gravity, the filter body can slide up and down in the dust cup through the chute and the slide rail.

[0011] Further, the chute and the slide rail are arranged along the axial direction of the dust cup. One of the chute and the slide rail is arranged at an end of the filter body away from the stop baffle, and the other of the chute and the slide rail is arranged on the side wall of the air outlet. A second flexible film layer is further arranged between the end of the end of the filter body away from the stop baffle and the periphery of the air outlet, and the second flexible film layer separates the chute and the slide rail from the internal space of the dust cup.

[0012] Further, in a cross-section along the axial direction of the dust cup, the cross-section of the stop ring is semi-circular or polygonal. When the cross-section of the stop ring is polygonal, the angle between the straight line where the side of the stop ring in contact with the side wall of the dust cup is located and the side wall of the dust cup is 15° to 80°.

[0013] Further, a notch is formed on one side of the stop ring facing the stop baffle. When the stop baffle abuts against the stop ring, the stop baffle is located within the notch.

[0014] Further, the notch includes a first connecting edge and a second connecting edge. From the position of the stop ring towards the stop baffle, the first connecting edge and the second connecting edge are connected in sequence. The second connecting edge is closer to the side wall of the dust cup than the first connecting edge. The extending direction of the first connecting edge is perpendicular to the side wall of the dust cup, and the extending direction of the second connecting edge is parallel to the side wall of the dust cup.

[0015] Further, the notch includes a third connecting edge, a fourth connecting edge and a fifth connecting edge. The third connecting edge, the fourth connecting edge and the fifth connecting edge are arranged in sequence. The third connecting edge is closer to the inside of the dust cup than the fifth connecting edge. The third connecting edge and the fifth connecting edge are parallel to the side wall of the dust cup, and the end of the third connecting edge is closer to the upper part of the dust cup than the end of the fifth connecting edge, so that the fourth connecting edge is inclined.

[0016] Further, the dust cup includes a first body part near the top and a second cup part near the bottom. The diameter of the first cup part is smaller than the diameter of the second cup part, so that a contraction part is formed at the connection of the first cup part and the second cup part, and the stop ring is formed on the contraction part.

[0017] In summary, in the present invention, through the provision of the closing mechanism, and by controlling, through the closing mechanism, whether the filter body communicates with the bottom space of the dust cup, when changing from downward suction operation to upward suction operation, it is not necessary to clean the dust in the dust cup in advance. After upward suction operation for a period of time, it is only necessary to turn the handheld vacuum cleaner downward again and open the closing mechanism, and the dust can fall back to the bottom of the dust cup again, and then continue the upward suction operation, that is, it is not necessary to frequently clean the dust during upward suction operation.

[0018] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the accompanying drawings, details are described as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a handheld vacuum cleaner in a normal state in the prior art.

[0020] Figure 2 It is a schematic structural diagram of a handheld vacuum cleaner when tilted upward in the prior art.

[0021] Figure 3 It is a schematic structural diagram of a handheld vacuum cleaner provided by the first embodiment of the present invention.

[0022] Figure 4 For Figure 3 a top view structural diagram of the dust cup of the handheld vacuum cleaner in

[0023] Figure 5 For Figure 3 a schematic structural diagram of the handheld vacuum cleaner during downward suction operation in

[0024] Figure 6 For Figure 3 a schematic structural diagram of the handheld vacuum cleaner during upward suction operation in

[0025] Figure 7 It is a schematic structural diagram of a handheld vacuum cleaner provided by the second embodiment of the present invention.

[0026] Figure 8 It is a schematic structural diagram of a handheld vacuum cleaner provided by the third embodiment of the present invention.

[0027] Figure 9 It is a schematic structural diagram of a handheld vacuum cleaner provided by the fourth embodiment of the present invention.

[0028] Figure 10 It is a schematic structural diagram of a handheld vacuum cleaner provided by the fifth embodiment of the present invention.

[0029] Figure 11 Schematic structural diagram of the handheld vacuum cleaner provided in the sixth embodiment of the present invention. Specific embodiments

[0030] To further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments.

[0031] The purpose of the present invention is to provide a handheld vacuum cleaner that can perform upward vacuuming operations without pre-cleaning the dust cup and without repeatedly cleaning the dust cup during the working process.

[0032] Figure 3 Schematic structural diagram of the handheld vacuum cleaner provided in the first embodiment of the present invention, Figure 4 is Figure 3 Top view structural diagram of the dust cup of the handheld vacuum cleaner in Figure 5 is Figure 3 Schematic structural diagram of the handheld vacuum cleaner during downward vacuuming operation in Figure 6 is Figure 3 Schematic structural diagram of the handheld vacuum cleaner during upward vacuuming operation in. As Figures 3 to 6 shown, the handheld vacuum cleaner provided in the first embodiment of the present invention includes a dust cup 10, a filter body 20, and a closing mechanism 30. An air inlet 11 and an air outlet 12 are formed on the dust cup 10. The filter body 20 is disposed on the end face of the dust cup 10 and surrounds the air outlet 12. The closing mechanism 30 is disposed at one end of the filter body 20 away from the air outlet 12, and the air outlet 12, the air inlet 11, and the filter body 20 are all located on the same side of the closing mechanism 30. When the handheld vacuum cleaner performs upward vacuuming operation, the closing mechanism 30 closes and forms a sealed space with the bottom of the dust cup 10 to prevent the sealed space from communicating with the space where the filter body 20 is located; when the handheld vacuum cleaner performs downward vacuuming operation, the closing mechanism 30 opens, so that the bottom of the dust cup 10 communicates with the space where the filter body 20 is located.

[0033] In this embodiment, through the setting of the closing mechanism 30 and by controlling the communication between the filter body 20 and the bottom space of the dust cup 10 by the closing mechanism 30, as Figure 5 shown, when the handheld vacuum cleaner performs downward vacuuming operation, the filter body 20 communicates with the bottom space of the dust cup 10. After the dust is sucked into the dust cup 10, due to gravity, it falls to the bottom of the dust cup 10; as Figure 6As shown, when the handheld vacuum cleaner performs vacuuming upward, the filter body 20 is not in communication with the bottom space of the dust cup 10, and the dust originally in the bottom space of the dust cup 10 cannot accumulate around the filter body 20. That is, when changing from vacuuming downward to vacuuming upward, it is not necessary to clean the dust in the dust cup 10 in advance. After vacuuming upward for a period of time, only need to turn the handheld vacuum cleaner downward again and open the closing mechanism 30, then the dust can fall into the bottom of the dust cup 10 again, and then continue to vacuum upward, that is, it is not necessary to frequently clean the dust when vacuuming upward.

[0034] Further, the closing mechanism 30 includes a stop ring 31 and a stop baffle 32. The stop ring 31 is circumferentially arranged on the inner side wall of the dust cup 10 along the circumference of the dust cup 10 and protrudes into the dust cup 10. The stop baffle 32 is arranged at one end of the filter body 20 away from the air outlet 12 and can move up and down relative to the dust cup 10 under the action of gravity. The stop baffle 32 and the air outlet 12 are respectively located on both sides of the stop ring 31. In the cross-section perpendicular to the axis of the dust cup 10, the diameter of the inner circle formed by the stop ring 31 is smaller than the diameter of the stop baffle 32. When the handheld vacuum cleaner performs vacuuming downward, there is a gap between the stop ring 31 and the stop baffle 32. When the handheld vacuum cleaner performs vacuuming upward, the stop ring 31 prevents the stop baffle 32 from moving towards the air outlet 12 direction. The above-mentioned sealed space is formed by the stop ring 31, the stop baffle 32 and the bottom of the dust cup 10.

[0035] Please continue to refer to Figure 3 , in this embodiment, the stop baffle 32 and the filter body 20 are connected by a first flexible film layer 33. When the handheld vacuum cleaner performs vacuuming downward, the stop baffle 32 can fall towards the bottom of the dust cup 10 due to gravity, and the first flexible film layer 33 is straightened so that the stop baffle 32 does not touch the bottom of the dust cup 10. When the handheld vacuum cleaner performs vacuuming upward, the stop baffle 32 abuts against the stop ring 31 due to gravity, and the first flexible film layer 33 bends without affecting the movement of the stop baffle 32.

[0036] Further, in this embodiment, the stop baffle 32 can be a hollow annular ring, and the first flexible film layer 33 is in a horn shape, that is, from the end close to the filter body 20 to the end far from the filter body 20, the diameter of the first flexible film layer 33 gradually increases. When the handheld vacuum cleaner performs vacuuming downward, the above-mentioned sealed space is jointly composed of the stop baffle 32, the stop ring 31, the first flexible film layer 33 and the bottom of the dust cup 10. Since the stop baffle 32 is annular, the first flexible film layer 33 seals the part in the middle of the ring, which can reduce the weight of the stop baffle 32.

[0037] In other embodiments, if the first flexible film layer 33 is in a shape such as a strip or a band that does not have a sealing function, the stop baffle 32 can be a single-piece plate body to ensure the sealing performance after the combination of the stop baffle 32 and the stop ring 31.

[0038] Further, in this embodiment, the difference between the diameter of the dust cup 10 and the diameter of the stop baffle 32 is smaller than the height by which the stop ring 31 protrudes from the inner side wall of the dust cup 10. At this time, even if one end of the stop baffle 32 contacts the inner side wall of the dust cup 10, the other end of the stop baffle 32 will not cross over the stop ring 31 and then enter the side of the stop ring 31 close to the air inlet 11, ensuring the sealing function of the stop baffle 32 and the stop ring 31.

[0039] As Figure 3 shown, in the cross-section along the axis direction of the dust cup 10, the cross-section of the stop ring 31 can be semi-circular to prevent damage to the first flexible film layer 33 and at the same time facilitate the sliding of the stop baffle 32 on the stop baffle 32.

[0040] Figure 7 It is a schematic structural diagram of the handheld vacuum cleaner provided by the second embodiment of the present invention. For the convenience of understanding, Figure 7 the enlarged structural diagram of the left circle is shown on the right. As Figure 7 shown, the handheld vacuum cleaner provided by the second embodiment of the present invention is basically the same as the first embodiment. The difference is that in the second embodiment, in the cross-section along the axis direction of the dust cup 10, the cross-section of the stop ring 31 can be a polygon, such as a triangle, a quadrilateral, a pentagon, etc. The angle between the straight line where the side of the stop ring 31 in contact with the side wall of the dust cup 10 is located and the side wall of the dust cup 10 is 15° to 80° (see Figure 7 α in), to avoid the formation of a dust collection dead angle at the contact part of the stop ring 31 and the dust cup 10 and facilitate the cleaning of dust. Preferably, the stop ring 31 and the side wall of the dust cup 10 are connected by a fillet.

[0041] Figure 8 It is a schematic structural diagram of the handheld vacuum cleaner provided by the third embodiment of the present invention. For the convenience of understanding, Figure 8 the enlarged structural diagram of the left circle is shown on the right. As Figure 8As shown, the handheld vacuum cleaner provided by the third embodiment of the present invention is basically the same as the first embodiment. The difference lies in that, in this embodiment, a notch 311 is formed on one side of the stop ring 31 facing the stop plate 32. When the stop plate 32 abuts against the stop ring 31, the stop plate 32 is located within the notch 311. In a cross-section along the axis direction of the dust cup 10, the notch 311 includes a first connecting edge 312 and a second connecting edge 313. In the direction from the position where the stop ring 31 is located towards the stop plate 32, the first connecting edge 312 and the second connecting edge 313 are connected in sequence, and the second connecting edge 313 is closer to the side wall of the dust cup 10 than the first connecting edge 312. The extending direction of the first connecting edge 312 is perpendicular to the side wall of the dust cup 10, and the extending direction of the second connecting edge 313 is parallel to the side wall of the dust cup 10. When the stop plate 32 enters the notch 311, the second connecting edge 313 will provide a supporting force to the stop plate 32 to prevent the stop plate 32 from tilting too much within the dust cup 10, so that the stop plate 32 and the stop ring 31 maintain a closed structure.

[0042] Figure 9 It is a schematic structural diagram of the handheld vacuum cleaner provided by the fourth embodiment of the present invention. For ease of understanding, Figure 8 The enlarged structural diagram of the left circle is shown on the right. As Figure 9 shown, the fourth embodiment of the present invention is basically the same as the third embodiment. The difference lies in that, in this embodiment, in a cross-section along the axis direction of the dust cup 10, the notch 311 includes a third connecting edge 314, a fourth connecting edge 315 and a fifth connecting edge 316. The third connecting edge 314, the fourth connecting edge 315 and the fifth connecting edge 316 are arranged in sequence. The third connecting edge 314 is closer to the inside of the dust cup 10 than the fifth connecting edge 316. The third connecting edge 314 and the fifth connecting edge 316 are parallel to the side wall of the dust cup 10, and the end of the third connecting edge 314 is closer to the upper part of the dust cup 10 than the end of the fifth connecting edge 316, so that the fourth connecting edge 315 is inclined. When the stop plate 32 slides into the notch 311, the third connecting edge 314 can be engaged with the inner side of the stop plate 32, while the fifth connecting edge 316 can support the outer side of the stop plate 32 to facilitate the fixation of the stop plate 32.

[0043] Figure 10Schematic diagram of the structure of the handheld vacuum cleaner provided in the fifth embodiment of the present invention. In the handheld vacuum cleaner provided in this embodiment, the structure is basically the same as that of the first embodiment. The difference lies in that in this embodiment, the dust cup 10 includes a first cup body portion 13 near the top and a second cup body portion 14 near the bottom. The diameter of the first cup body portion 13 is smaller than that of the second cup body portion 14, so as to form a contraction portion between the first cup body portion 13 and the second cup body portion 14. The above-mentioned stop ring 31 is formed on this contraction portion. That is, in this embodiment, the stroke of the stop plate 32 is blocked by the contraction portion, and together with the stop plate 32, the bottom of the dust cup 10 is sealed.

[0044] Figure 11 Schematic diagram of the structure of the handheld vacuum cleaner provided in the sixth embodiment of the present invention. As a variant of the first embodiment, in the sixth embodiment of the present invention, the closing mechanism 30 further includes a chute 34 and a slide rail 35 in addition to the stop ring 31 and the stop plate 32. One of the chute 34 and the slide rail 35 is provided on the filter body 20, and the other of the chute 34 and the slide rail 35 is provided on the dust cup 10. Under the action of gravity, the filter body 20 can slide up and down in the dust cup 10 through the chute 34 and the slide rail 35. By the sliding of the filter body 20, the movement of the stop plate 32 is driven to complete the opening and closing between the stop plate 32 and the stop ring 31. At this time, the first flexible film layer 33 may no longer be needed between the stop plate 32 and the filter body 20, which can reduce the impact on the stop ring 31 when the stop plate 32 moves and reduce abnormal noises.

[0045] In this embodiment, the chute 34 and the slide rail 35 are arranged along the axial direction of the dust cup 10. One of the chute 34 and the slide rail 35 is provided at one end of the filter body 20 away from the stop plate 32, and the other of the chute 34 and the slide rail 35 is provided on the side wall of the air outlet 12. In this embodiment, a second flexible film layer 36 is further provided between the end of the filter body 20 away from the stop plate 32 and the periphery of the air outlet 12. The setting of the second flexible film layer 36 can separate the chute 34 and the slide rail 35 from the internal space of the dust cup 10 on the premise of not affecting the sliding between the filter body 20 and the dust cup 10, and ensure the sealing performance of the internal space of the dust cup 10.

[0046] In summary, in the present invention, through the setting of the closing mechanism 30 and by controlling the connection or disconnection between the filter body 20 and the bottom space of the dust cup 10 by the closing mechanism 30, when changing from downward vacuuming operation to upward vacuuming operation, it is not necessary to clean the dust in the dust cup 10 in advance. After upward vacuuming operation for a period of time, only need to turn the handheld vacuum cleaner downward again and open the closing mechanism 30, and the dust can fall into the bottom of the dust cup 10 again, and then continue the upward vacuuming operation, that is, it is not necessary to frequently clean the dust during the upward vacuuming operation.

[0047] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A handheld vacuum cleaner, comprising a dust cup and a filter body. An air inlet and an air outlet are formed on the dust cup, and the filter body is disposed around the air outlet. It is characterized in that: The handheld vacuum cleaner further comprises a closing mechanism. The closing mechanism is disposed at one end of the filter body away from the air outlet, and the air outlet, the air inlet and the filter body are all located on the same side of the closing mechanism. When the handheld vacuum cleaner performs a dust suction operation upward, the closing mechanism closes and forms a sealed space with the bottom of the dust cup, preventing the sealed space from communicating with the space where the filter body is located; when the handheld vacuum cleaner performs a dust suction operation downward, the closing mechanism opens, and the bottom of the dust cup communicates with the space where the filter body is located; the closing mechanism comprises a stop ring and a stop baffle. The stop ring is circumferentially disposed on the inner side wall of the dust cup along the circumference of the dust cup and protrudes into the interior of the dust cup. The stop baffle is disposed at one end of the filter body away from the air outlet and can move up and down relative to the dust cup under the action of gravity. The stop baffle and the air outlet are respectively located on both sides of the stop ring. In a cross section perpendicular to the axis of the dust cup, the diameter of the inner circle formed by the stop ring is smaller than the diameter of the stop baffle. When the handheld vacuum cleaner performs a dust suction operation downward, a gap is formed between the stop ring and the stop baffle. When the handheld vacuum cleaner performs a dust suction operation upward, the stop ring prevents the stop baffle from moving towards the air outlet, and the sealed space is formed by the stop ring, the stop baffle and the bottom of the dust cup.

2. The handheld vacuum cleaner according to claim 1, It is characterized in that: The closing mechanism further comprises a first flexible film layer, and the first flexible film layer is connected between the stop baffle and the filter body.

3. The handheld vacuum cleaner according to claim 2, It is characterized in that: The stop baffle is annular. From the end close to the filter body to the end far from the filter body, the diameter of the first flexible film layer gradually increases, and the sealed space is jointly formed by the stop baffle, the stop ring, the first flexible film layer and the bottom of the dust cup.

4. The handheld vacuum cleaner according to claim 1, It is characterized in that: The closing mechanism further comprises a chute and a slide rail. One of the chute and the slide rail is disposed on the filter body, and the other of the chute and the slide rail is disposed on the dust cup. Under the action of gravity, the filter body can slide up and down in the dust cup through the chute and the slide rail.

5. The handheld vacuum cleaner according to claim 4, It is characterized in that: The chute and the slide rail are disposed along the axial direction of the dust cup. One of the chute and the slide rail is disposed at one end of the filter body away from the stop baffle, and the other of the chute and the slide rail is disposed on the side wall of the air outlet. A second flexible film layer is further disposed between the end of the filter body away from the stop baffle and the periphery of the air outlet, and the second flexible film layer separates the chute and the slide rail from the internal space of the dust cup.

6. The handheld vacuum cleaner according to claim 1, wherein: In a cross-section along the axis direction of the dust cup, the cross-section of the stop ring is semi-circular or polygonal. When the cross-section of the stop ring is polygonal, the angle between the straight line where the side of the stop ring in contact with the side wall of the dust cup is located and the side wall of the dust cup is 15° - 80°.

7. The handheld vacuum cleaner according to claim 1, wherein: A notch is formed on one side of the stop ring facing the stop baffle. When the stop baffle abuts against the stop ring, the stop baffle is located within the notch.

8. The handheld vacuum cleaner according to claim 7, wherein: The notch includes a first connecting side and a second connecting side. From the position of the stop ring towards the stop baffle, the first connecting side and the second connecting side are connected in sequence. The second connecting side is closer to the side wall of the dust cup than the first connecting side. The extending direction of the first connecting side is perpendicular to the side wall of the dust cup, and the extending direction of the second connecting side is parallel to the side wall of the dust cup.

9. The handheld vacuum cleaner according to claim 7, wherein: The notch includes a third connecting side, a fourth connecting side and a fifth connecting side. The third connecting side, the fourth connecting side and the fifth connecting side are arranged in sequence. The third connecting side is closer to the inside of the dust cup than the fifth connecting side. The third connecting side and the fifth connecting side are parallel to the side wall of the dust cup, and the end of the third connecting side is closer to the upper part of the dust cup than the end of the fifth connecting side, so that the fourth connecting side is inclined.

10. The handheld vacuum cleaner according to claim 7, wherein: The dust cup includes a first cup body part near the top and a second cup body part near the bottom. The diameter of the first cup body part is smaller than the diameter of the second cup body part, so that a constriction part is formed at the connection of the first cup body part and the second cup body part, and the stop ring is formed on the constriction part.

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