Flat suction structure capable of rotating freely

Abstract

The utility model discloses a flat suction structure capable of rotating freely. The flat suction structure comprises a flat suction nozzle, the first spherical joint is arranged at the air outlet end of the flat suction nozzle, and a through hole in the first spherical joint is in butt joint with a first cavity in the flat suction nozzle; the dust collector butt joint pipe is in butt joint with the dust collector air inlet pipe; the second spherical joint is arranged at the air inlet end of the dust collector butt joint pipe, and a through hole in the second spherical joint is in butt joint with a third cavity in the dust collector butt joint pipe; the first spherical joint and the second spherical joint are rotatably inserted or sleeved and are spliced in the first spherical joint and the second spherical joint to form a second cavity; the second cavity is communicated with the first cavity and the third cavity; and the locking cover is positioned on the edge of the first spherical joint or the second spherical joint on the outer side. The flat suction structure of the dust collector can solve the problems that an existing flat suction structure of the dust collector is inconvenient to operate, poor in dust collection efficiency, strong in fatigue feeling of a user and poor in use experience feeling in use environments such as narrow spaces and irregular surfaces.

Description

Technical Field

[0001] This utility model relates to the field of vacuum cleaner technology, specifically a freely rotatable flat suction structure. Background Technology

[0002] Vacuum cleaners are generally used with a corresponding crevice tool. Before use, attach the crevice tool to the vacuum cleaner's air intake pipe. When in use, place the crevice tool nozzle against the surface to be cleaned, allowing the powerful suction at the nozzle to draw dust, hair, and other dirt from the surface and into the vacuum cleaner. The vacuum cleaner then separates and collects the dirt-laden airflow and discharges clean air, achieving efficient operation. When in use, you can choose to remove the crevice tool and store it separately from the vacuum cleaner, or you can store them as a single unit without disassembly.

[0003] The flat nozzle structure that connects to the air intake pipe of a conventional vacuum cleaner is usually a fixed, integrated structure. After connecting to the air intake pipe, adjusting the relative tilt angle between the flat nozzle and the cleaning surface, as well as their fit, requires adjusting both the vacuum cleaner and the flat nozzle structure as a whole. In some complex usage scenarios, such as narrow spaces like crevices against walls or floors, or irregular structures like corners, repeated adjustments to the vacuum cleaner and flat nozzle structure are necessary. This makes operation inconvenient and prevents a tight fit between the flat nozzle and the cleaning surface, inevitably causing air leakage. This results in significant suction loss in the flat nozzle structure, affecting cleaning efficiency, extending vacuum cleaner usage time, and noticeably reducing the cleanliness of the cleaning surface. Furthermore, users often hold the vacuum cleaner in various positions, and the frequent adjustments and shifts in the vacuum cleaner's center of gravity significantly increase wrist fatigue, further impacting the ease of use and effortless performance of the vacuum cleaner.

[0004] Some flat nozzles use a hose to connect to the vacuum cleaner, which makes the overall structure relatively loose. Users need to support the weight of the flat nozzle and the vacuum cleaner with both hands, which can cause fatigue. When the vacuum cleaner and flat nozzle move, the user's movement is affected by the hose, and the resulting impact can easily cause the user to lose stability and tip over. The hose may also loosen or even detach from the end structure, making operation more inconvenient. Utility Model Content

[0005] The purpose of this invention is to provide a freely rotatable flat suction structure to solve the problems of inconvenient operation, poor suction efficiency, and high user fatigue caused by the existing flat suction structure of vacuum cleaners in use environments such as narrow spaces and irregular surfaces.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a freely rotatable flat suction structure, comprising:

[0007] Flat suction nozzle;

[0008] A first spherical connector is disposed at the air outlet end of the flat suction nozzle, and the through hole on the first spherical connector is connected to the first cavity inside the flat suction nozzle.

[0009] Vacuum cleaner connecting pipe, which connects to the vacuum cleaner's air inlet pipe;

[0010] The second ball joint is located at the air inlet end of the vacuum cleaner connecting pipe, and the through hole on the second ball joint is connected to the third cavity inside the vacuum cleaner connecting pipe.

[0011] The first ball joint and the second ball joint can be rotatably inserted or sleeved and assembled inside them to form a second cavity;

[0012] The second cavity is connected to the first cavity and the third cavity;

[0013] A locking cap is positioned on the edge of the first or second ball joint located on the outside.

[0014] As a further description of the above technical solution:

[0015] The air inlet end face of the flat suction nozzle is wedge-shaped;

[0016] The first cavity has a waist-shaped or elliptical cross-section, and the third cavity has a waist-shaped or elliptical cross-section.

[0017] As a further description of the above technical solution:

[0018] The vacuum cleaner's connecting pipe has an insertion tube at its air outlet end, which is inserted into or sleeved with the stepped structure on the surface of the vacuum cleaner's air inlet pipe.

[0019] The insertion tube is circumferentially offset from the surface of the stepped structure by several guide ribs.

[0020] As a further description of the above technical solution:

[0021] At least one notch is provided at the outer end of the cannula, and an elastic plate extends from the side of the notch, with a locking block provided on the elastic plate;

[0022] The card block is elastically engaged with the card slot on the surface of the stepped structure by means of the elastic plate.

[0023] As a further description of the above technical solution:

[0024] The second cavity is a cavity formed by combining two hemispherical or semi-capsule-shaped structures;

[0025] The inner surface of the edge of the first or second spherical joint located on the inner side is provided with an outwardly expanding, wedge-shaped or arc-shaped receiving surface.

[0026] As a further description of the above technical solution:

[0027] The line connecting the centers of the first and second spherical connectors is parallel to the axis of the flat suction nozzle and the vacuum cleaner connecting pipe, and the first and second spherical connectors can rotate relative to each other along the line connecting their centers.

[0028] As a further description of the above technical solution:

[0029] The centers of the first and second spherical joints coincide, and the first and second spherical joints can rotate relative to each other along any axis.

[0030] As a further description of the above technical solution:

[0031] The outer surface of the edge of the first or second spherical joint located on the inner side is provided with annular bosses and annular ribs;

[0032] The annular boss and the annular rib are spaced apart and form an installation groove between them, and an O-ring is embedded in the installation groove;

[0033] The locking cap seals against the annular boss, O-ring, and annular rib.

[0034] As a further description of the above technical solution:

[0035] The first ball joint, the second ball joint, and the locking cover are rotatably and tightly fitted with a protective shell;

[0036] The locking cover is provided with a first arc-shaped barrier at its end, and the first or second spherical joint located on the inner side forms a movable cavity with the locking cover and the first arc-shaped barrier;

[0037] An electromagnet and a sensor are disposed on the outer surface of the first or second spherical joint located on the inner side within the movable cavity. The electromagnet is connected to the sensor, and the sensor corresponds to the first arc-shaped enclosure.

[0038] A permanent magnet is provided on the second arc-shaped enclosure at the end of the protective shell, and the electromagnet magnetically connects with the permanent magnet after being energized.

[0039] As a further description of the above technical solution:

[0040] The sensor is a varistor.

[0041] In summary, by adopting the above technical solution, this utility model has the following advantages over the prior art:

[0042] Beneficial effects:

[0043] 1. Based on the aforementioned shortcomings of existing vacuum cleaner products, this utility model's flat suction structure adopts a two-section, rotatable design. During use, the vacuum cleaner can always be held in the most comfortable posture for the user. The orientation of the flat suction nozzle can be adjusted based on the actual conditions of the cleaning surface by allowing relatively free relative rotation between the nozzle, the vacuum cleaner, and the connecting pipe. This achieves full contact between the nozzle and the cleaning surface, ensuring suction efficiency, significantly reducing vacuum cleaner usage time, and lowering energy consumption, realizing the concepts of energy saving, green use, and design. Simultaneously, it maintains the most stable and comfortable usage posture for the user, improving the user experience.

[0044] 2. Considering that when the flat nozzle and the vacuum cleaner connecting pipe rotate relative to each other, the joints of the first and second spherical connectors are located at the corner of the airflow. At this time, the outer side of the corner is significantly impacted and eroded by the airflow. Therefore, a protective shell is also provided on this flat nozzle structure. This design incorporates a linkage mechanism during the movement of the flat nozzle structure to reinforce and protect the outer side of the airflow corner at the first and second spherical connectors, improving the structural strength and buffering performance at this location, thereby enhancing the structural airflow stability and service life. During use, the flat nozzle and the vacuum cleaner connecting pipe rotate relative to each other. The dust-laden airflow inside the flat nozzle structure is relatively concentrated at the outer side of the airflow corner formed at the joint of the first and second spherical connectors due to the relative rotation of the flat nozzle and the vacuum cleaner connecting pipe. At this time, the resistance of the varistor changes due to the pressure of the first arc-shaped enclosure on the sensor, which in turn causes changes in parameters such as the current in the circuit where the corresponding electromagnet is located. This strengthens the magnetic attraction between the electromagnet and the permanent magnet on that side, causing the protective shell to rotate and move closer to the locking cover. As a result, the area covered by the protective shell on the first spherical joint, corresponding to the area outside the airflow bend, increases, thus providing sufficient support for the structure at that location. This improves the impact resistance and buffering performance of the structure, thereby enhancing the structural strength and flow guidance stability. Attached Figure Description

[0045] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of a freely rotatable flat suction structure.

[0047] Figure 2 This is an exploded view of a freely rotatable flat suction structure.

[0048] Figure 3 This is a cross-sectional view of the connection node of the first spherical connector, the second spherical connector, and the locking cover in a freely rotatable flat suction structure.

[0049] Figure 4 This is a cross-sectional view of the connection node of the first spherical connector, the second spherical connector, the locking cover, and the protective housing in a freely rotatable flat suction structure.

[0050] Figure 5 This is a diagram showing the usage status of the first ball joint, the second ball joint, the locking cover, and the protective housing in a freely rotatable flat suction structure.

[0051] Legend:

[0052] 1. Flat suction nozzle;

[0053] 2. First ball joint;

[0054] 3. Vacuum cleaner connecting pipe; 31. Insert pipe; 32. Notch; 33. Flexible plate; 34. Locking block; 35. Guide rib;

[0055] 4. Second spherical joint; 41. Annular boss; 42. Annular rib; 43. Mounting groove; 44. Receiving surface;

[0056] 5. Locking cover; 51. First arc-shaped enclosure; 52. Movable cavity;

[0057] 6. O-ring seal;

[0058] 7. Protective casing; 71. Second arc-shaped enclosure;

[0059] 8. Electromagnet; 81. Sensor;

[0060] 9. Permanent magnet;

[0061] 11. First cavity; 12. Second cavity; 13. Third cavity. Detailed Implementation

[0062] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0063] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0064] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0065] In the description of the embodiments of this utility model, it should be noted that the terms "upper" and "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0066] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0067] Example 1:

[0068] Please see Figure 1-3 This utility model provides a technical solution: a freely rotatable flat suction structure, comprising:

[0069] Flat suction nozzle 1;

[0070] The first ball joint 2 is disposed at the air outlet end of the flat suction nozzle 1, and the through hole on the first ball joint 2 is connected to the first cavity 11 inside the flat suction nozzle 1.

[0071] Vacuum cleaner connecting pipe 3 connects to the vacuum cleaner air inlet pipe;

[0072] The second ball joint 4 is disposed at the air inlet end of the vacuum cleaner connecting pipe 3, and the through hole on the second ball joint 4 is connected to the third cavity 13 inside the vacuum cleaner connecting pipe 3.

[0073] The first ball joint 2 and the second ball joint 4 are rotatably inserted or sleeved and assembled inside them to form a second cavity 12;

[0074] The second cavity 12 is connected to the first cavity 11 and the third cavity 13;

[0075] When in use, the motor inside the vacuum cleaner operates, creating negative pressure within the flat suction structure. Dust, hair, and other debris from the surface enter the flat suction structure through the first chamber 11 of the flat suction nozzle 1. The dust-laden airflow continues to flow, entering the second chamber 12 and then the third chamber 13 into the vacuum cleaner's air inlet pipe. Next, it enters the vacuum cleaner's dust cup for the separation of dust, hair, and other impurities. Finally, the clean airflow is discharged from the vacuum cleaner by the motor, thus achieving efficient adsorption and separation of impurities.

[0076] Conventional vacuum cleaners often use a fixed, integrated flat nozzle structure connected to the air intake. When this structure connects to the air intake, adjusting the relative angle between the nozzle and the cleaning surface, as well as their fit, requires adjusting both the vacuum cleaner and the flat nozzle as a whole. In complex scenarios, such as narrow spaces like crevices against walls or floors, or irregular surfaces like corners, repeated adjustments to the vacuum cleaner and flat nozzle's posture are necessary. This makes operation inconvenient and prevents a tight fit between the nozzle and the surface, inevitably leading to air leakage. This results in significant suction loss, affecting cleaning efficiency, extending vacuum cleaner usage time, and noticeably reducing the cleanliness of the surface. Furthermore, the frequent adjustments and shifts in the vacuum cleaner's center of gravity due to the user's various gripping postures significantly increase wrist fatigue, further impacting the vacuum cleaner's ease of use and effortlessness.

[0077] Based on the aforementioned shortcomings of existing vacuum cleaner products, this utility model's flat suction structure adopts a two-section, rotatable design. During use, the vacuum cleaner can always be held in the most comfortable posture for the user. The orientation of the flat suction nozzle can be adjusted based on the actual conditions of the cleaning surface by allowing relatively free relative rotation between the nozzle, the vacuum cleaner, and the connecting pipe. This achieves full contact between the nozzle and the cleaning surface, ensuring suction efficiency, significantly reducing vacuum cleaner usage time, and lowering energy consumption, realizing the concepts of energy saving, green use, and design. Simultaneously, it maintains the most stable and comfortable usage posture for the user, improving the user experience.

[0078] Locking cap 5 is positioned on the edge of the first ball joint 2 or the second ball joint 4 located on the outside.

[0079] Locking cap 5 is mainly used for sealing the mating structure of ball joints. Figure 1-5The assembly design adopts a structure in which the first ball joint 2 is sleeved on the second ball joint 4. Therefore, the following description is mainly based on this freely rotatable docking structure. Of course, a design structure in which the first ball joint 2 is inserted into the inner wall of the second ball joint 4 can also be adopted, but it will not be elaborated on here.

[0080] Annular protrusions 41 and annular ribs 42 are provided on the outer surface of the edge of the first spherical connector 2 or the second spherical connector 4 located on the inner side. As shown in the attached figure, the annular protrusions 41 and annular ribs 42 are arranged on the outer surface of the end of the second spherical connector 4 that mates with the first spherical connector 2. This enables stable sealing support and rotational guidance between the second spherical connector 4, the first spherical connector 2, and the locking cover 5, thereby improving the rotational flexibility of the two spherical rotating docking structure. At the same time, it ensures the sealing of the flat suction structure at this point, avoiding the air leakage defect that exists at the docking point of conventional adjustable structures. This ensures that the flat suction structure has no suction loss, high-efficiency dust collection, and airflow guidance.

[0081] The annular boss 41 and the annular rib 42 are spaced apart, forming a mounting groove 43 between them. An O-ring 6 is embedded in the mounting groove 43. Based on the sealing and guiding structure of the annular boss 41, the annular rib 42, the first spherical joint 2, and the locking cover 5, the O-ring 6 is arranged in the mounting groove 43 at the gap between them. Through its elastic and flexible structural characteristics, it can be tightly pressed against the surface of the first spherical joint 2 and the locking cover 5, which can further improve the sealing effect. Moreover, when the first spherical joint 2, the locking cover 5, and the second spherical joint 4 rotate relatively freely within a certain range, the O-ring 6 will not fall out, thereby ensuring a stable sealing effect.

[0082] Among them, multiple sets of annular bosses 41 and annular ribs 42 can be arranged at intervals and tightly fitted and positioned with O-rings 6 of different positions and sizes. The above-mentioned structural dimensions and structural shapes are consistent with the corresponding positions of the inner wall of the first spherical joint 2. Thus, through several sets of coaxial circular sealing structures axially distributed on the surface of the second spherical joint 4, a more complete, tight, and freely rotating spherical joint sealing design is achieved, thereby improving the sealing performance.

[0083] After the flat suction structure is assembled, the locking cover 5 seals against the annular boss 41, the O-ring 6, and the annular rib 42.

[0084] The manufacturing process of a freely rotatable flat suction structure in this embodiment includes:

[0085] ① Embed the O-ring 6 into the mounting groove 43 on the surface of the second ball joint 4;

[0086] ② The second ball joint 4 is inserted into the first ball joint 2;

[0087] ③The locking cover 5 covers the second ball joint 4, and its inner wall is in close contact with the annular boss 41, the annular rib 42, and the O-ring seal 6;

[0088] ④Preliminary test of the rotational flexibility of the second ball joint 4, the first ball joint 2, and the locking cover 5;

[0089] ⑤ The end face of the locking cover 5 is joined with the end face of the first ball joint 2 for structural fixation. In this embodiment, the two are fixed by ultrasonic welding of the end faces. Of course, a detachable design with edge bolts and flanges can also be used, or other conventional hollow structure end face locking and fixing methods can be used. Further details will not be provided here.

[0090] Example 2:

[0091] Please see Figure 1-3 Based on the above embodiment one, preferably, the air inlet end face of the flat suction nozzle 1 is a wedge-shaped surface. This allows the air inlet end of the flat suction nozzle 1 to fit more tightly with the cleaning surface. Compared with the conventional flat suction nozzle's vertical end face design perpendicular to its axis, the orientation adjustment operation is more convenient and simple, and the increased air intake area can further increase the air intake volume, achieving more efficient dust removal from the cleaning surface.

[0092] The first cavity 11 has a waist-shaped or elliptical cross-section, and the third cavity 13 has a waist-shaped or elliptical cross-section. In this embodiment, the first cavity 11, the third cavity 13, and other guiding cavities adopt a waist-shaped or elliptical cross-section design, which can improve the guiding stability and guiding efficiency of dust-laden airflow compared to conventional circular guiding pipes.

[0093] Example 3:

[0094] Please see Figure 1-3 Based on the above embodiment one, preferably, the air outlet end of the vacuum cleaner connecting pipe 3 is provided with a plug 31, and the plug 31 is plugged or sleeved with the stepped structure on the surface of the vacuum cleaner air inlet pipe.

[0095] The insertion tube 31 and the stepped structure are circumferentially offset by several guide ribs 35. When the guide ribs 35 on the two structural surfaces are inserted, they can be arranged at larger intervals so that they only abut and guide the corresponding insertion tube 31 or stepped structure. Alternatively, the arrangement interval can be reduced to achieve lateral abutment between adjacent guide ribs 35, resulting in a tighter mortise and tenon joint structure. This improves the tightness and reliability of the connection between the flat suction structure and the vacuum cleaner's air inlet pipe. In this case, no other locking structure design is required, and stable assembly can be achieved, thereby improving assembly convenience, reducing installation steps and processes, making the assembly process easier to learn, and making the alignment and insertion between structures more convenient. In addition, the dimensions of the guide ribs 35 on the two structures can be designed differently to quickly identify the orientation during assembly, further improving the convenience of alignment.

[0096] At least one notch 32 is provided at the outer end of the insertion tube 31, and an elastic plate 33 extends from the side of the notch 32. A locking block 34 is provided on the elastic plate 33.

[0097] The card block 34 is elastically engaged in the slot on the surface of the stepped structure by the elastic plate 33.

[0098] The manufacturing process of a freely rotatable flat suction structure in this embodiment includes:

[0099] ①Identify the orientation of the vacuum cleaner connecting pipe 3 and the vacuum cleaner air inlet pipe through components such as the guide rib 35, and perform preliminary insertion of the insertion pipe 31 into the stepped structure;

[0100] ② When the insertion tube 31 is inserted into the stepped structure, the locking block 34 is pressed and the elastic plate 33 tilts inward, so that the locking block 34 is pressed into the stepped structure at the same time until the locking block 34 is connected with the slot of the stepped structure, thus completing the assembly and connection of the flat suction structure and the vacuum cleaner air inlet tube.

[0101] Example 4:

[0102] Please see Figure 2-3 Based on the above embodiment one, preferably, the second cavity 12 is a cavity formed by combining two hemispherical or semi-capsule-shaped structures.

[0103] When the second cavity 12 is a cavity formed by assembling two hemispherical structures, the docking structure of the first spherical joint 2 and the second spherical joint 4 with the same structure is as follows: the center of the first spherical joint 2 and the second spherical joint 4 coincide, and the first spherical joint 2 and the second spherical joint 4 can rotate relative to each other along any axis.

[0104] The free rotation connection structure of the first ball joint 2 and the second ball joint 4 in this embodiment can realize the free rotation of the flat suction nozzle 1 and the vacuum cleaner air inlet pipe along any axis, making the flat suction structure posture adjustment more flexible for complex usage scenarios.

[0105] When the second cavity 12 is a cavity formed by combining two semi-capsule-shaped structures, the docking structure of the first spherical connector 2 and the second spherical connector 4 with the same structure is as follows: the line connecting the center of the first spherical connector 2 and the second spherical connector 4 is parallel to the axis of the flat suction nozzle 1 and the vacuum cleaner connecting pipe 3, and the first spherical connector 2 and the second spherical connector 4 can rotate relative to each other along the line connecting their centers.

[0106] Another embodiment of the free rotation connection structure between the first ball joint 2 and the second ball joint 4 can realize the free rotation of the flat suction nozzle 1 along its axis, which can make the wedge-shaped end face of the flat suction nozzle 1 be adjusted quickly and stably.

[0107] Compared to the previous structure, it is more convenient and stable for simple multi-faceted vacuuming and cleaning operations, and does not require much adjustment of the flat suction structure's storage posture when storing, making it more convenient to use.

[0108] Of course, under this structure, it is necessary to guide the uniaxial rotation of the first ball joint 2 and the second ball joint 4, which can be achieved by rotatably embedding the annular boss 41 and the annular rib 42 into the first ball joint 2 and / or the locking cover 5.

[0109] The inner edge of the first spherical joint 2 or the second spherical joint 4 located on the inner side is provided with an outwardly expanding, wedge-shaped or arc-shaped receiving surface 44. This improves the smoothness of the surface bearing at the mating point of the first spherical joint 2 and the second spherical joint 4, making the flow of dust-laden air more stable.

[0110] Example 5:

[0111] Please see Figure 4-5 Based on the above embodiment one, preferably, the first spherical connector 2, the second spherical connector 4, and the locking cover 5 are rotatably and tightly fitted with a protective shell 7.

[0112] Considering that when the flat suction nozzle 1 and the vacuum cleaner connecting pipe 3 rotate relative to each other, the joint between the first ball joint 2 and the second ball joint 4 is located at the corner of the airflow. At this time, the outer side of the corner is significantly impacted and eroded by the airflow. Therefore, in this embodiment, a protective shell 7 is provided to carry out the linkage design when the flat suction structure is in motion, so as to reinforce and protect the outer side of the airflow corner of the first ball joint 2 and the second ball joint 4, improve the structural strength and buffer performance at this point, and thus improve the structural airflow stability and service life.

[0113] The structural features of the linkage between the protective shell 7 and the flat suction structure are as follows:

[0114] The locking cover 5 has a first arc-shaped baffle 51 at its end, and the first spherical connector 2 or the second spherical connector 4 located on the inner side forms a movable cavity 52 between the locking cover 5 and the first arc-shaped baffle 51. The first arc-shaped baffle 51 is mainly used to guide the movement of the structure between the first spherical connector 2, the second spherical connector 4 and the locking cover 5, and to seal the connection between the locking cover 5 and the second spherical connector 4 to prevent external dust and other impurities from seeping into it and adhering to the structural surface, thus hindering the rotation of the structure.

[0115] An electromagnet 8 and a sensor 81 are disposed on the outer surface of the first spherical joint 2 or the second spherical joint 4 located on the inner side within the movable cavity 52. ​​The electromagnet 8 is connected to the sensor 81, and the sensor 81 corresponds to the first arc-shaped enclosure 51.

[0116] A permanent magnet 9 is provided on the second arc-shaped enclosure 71 at the end of the protective shell 7. When the electromagnet 8 is energized, it magnetically connects with the permanent magnet 9.

[0117] The sensor 81 is a piezoresistor. Specifically, the sensor 81 used is a pressure-dependent resistor, a special type of resistor whose resistance changes with the pressure it is subjected to. This type of resistor is commonly used in various pressure sensing applications, such as electronic scales, pressure switches, and industrial control systems. The relationship between the resistance value of a piezoresistor and pressure can be linear or non-linear, depending on the materials used and the manufacturing process. As a conventional electrical device whose resistance value changes synchronously with changes in external pressure, its specific structure will not be described in detail here.

[0118] The working principle or manufacturing process of a freely rotatable flat suction structure in this embodiment includes: When in use, as... Figure 5As shown, the flat suction nozzle 1 rotates relative to the vacuum cleaner connecting pipe 3, with the direction of rotation indicated by the dashed arrow on the right. The solid arrow represents the flow path of the dust-laden airflow inside the flat suction structure. The airflow is relatively concentrated at the outer corner of the airflow formed at the junction of the first spherical connector 2 and the second spherical connector 4 due to the relative rotation of the flat suction nozzle 1 and the vacuum cleaner connecting pipe 3. At this time, because the first arc-shaped barrier 51 presses against the sensor 81, the resistance of the piezoresistor changes, which in turn causes changes in parameters such as the current in the circuit where the corresponding electromagnet 8 is located. This strengthens the magnetic attraction between the electromagnet 8 and the permanent magnet 9 on this side, causing the protective shell 7 to rotate closer to the locking cover 5. As a result, the area covered by the protective shell 7 on the first spherical connector 2, corresponding to the outer corner of the airflow, increases, providing sufficient support for the structure and improving its impact resistance and buffering performance, thereby increasing structural strength and airflow stability.

[0119] In summary, due to the adoption of the above technical solution, the freely rotatable flat suction structure of this embodiment has the following advantages compared with the prior art:

[0120] 1. Based on the aforementioned shortcomings of existing vacuum cleaner products, this utility model's flat suction structure adopts a two-section, rotatable design. During use, the vacuum cleaner can always be held in the most comfortable posture for the user. The orientation of the flat suction nozzle can be adjusted based on the actual conditions of the cleaning surface by allowing relatively free relative rotation between the nozzle, the vacuum cleaner, and the connecting pipe. This achieves full contact between the nozzle and the cleaning surface, ensuring suction efficiency, significantly reducing vacuum cleaner usage time, and lowering energy consumption, realizing the concepts of energy saving, green use, and design. Simultaneously, it maintains the most stable and comfortable usage posture for the user, improving the user experience.

[0121] 2. Considering that when the flat nozzle and the vacuum cleaner connecting pipe rotate relative to each other, the joints of the first and second spherical connectors are located at the corner of the airflow. At this time, the outer side of the corner is significantly impacted and eroded by the airflow. Therefore, a protective shell is also provided on this flat nozzle structure. This design incorporates a linkage mechanism during the movement of the flat nozzle structure to reinforce and protect the outer side of the airflow corner at the first and second spherical connectors, improving the structural strength and buffering performance at this location, thereby enhancing the structural airflow stability and service life. During use, the flat nozzle and the vacuum cleaner connecting pipe rotate relative to each other. The dust-laden airflow inside the flat nozzle structure is relatively concentrated at the outer side of the airflow corner formed at the joint of the first and second spherical connectors due to the relative rotation of the flat nozzle and the vacuum cleaner connecting pipe. At this time, the resistance of the varistor changes due to the pressure of the first arc-shaped enclosure on the sensor, which in turn causes changes in parameters such as the current in the circuit where the corresponding electromagnet is located. This strengthens the magnetic attraction between the electromagnet and the permanent magnet on that side, causing the protective shell to rotate and move closer to the locking cover. As a result, the area covered by the protective shell on the first spherical joint, corresponding to the area outside the airflow bend, increases, thus providing sufficient support for the structure at that location. This improves the impact resistance and buffering performance of the structure, thereby enhancing the structural strength and flow guidance stability.

[0122] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A freely rotatable flat suction structure, characterized in that The utility model relates to a flat suction nozzle, a first spherical joint arranged at the air outlet end of the flat suction nozzle, a through hole of the first spherical joint being connected with a first cavity in the flat suction nozzle, a dust collector connecting pipe connected with a dust collector air inlet pipe, a second spherical joint arranged at the air inlet end of the dust collector connecting pipe, a through hole of the second spherical joint being connected with a third cavity in the dust collector connecting pipe, the first spherical joint and the second spherical joint being rotatably inserted or sleeved and combined to form a second cavity, the second cavity being connected with the first cavity and the third cavity, and a locking cover arranged at the edge of the first spherical joint or the second spherical joint on the outside. The end surface of the air inlet end of the flat suction nozzle is a wedge-shaped surface, the cross section of the first cavity is a waist-shaped or elliptical shape, and the cross section of the third cavity is a waist-shaped or elliptical shape. The air outlet end of the dust collector connecting pipe is provided with a spigot, the spigot is inserted or sleeved with a stepped structure on the surface of the dust collector air inlet pipe, and a plurality of guide ribs are arranged on the surface of the stepped structure in a circumferential direction. At least one notch is arranged at the outer end of the spigot, an elastic plate is arranged on the side surface of the notch, a clamping block is arranged on the elastic plate, and the clamping block is elastically clamped in a clamping groove on the surface of the stepped structure through the elastic plate. The second cavity is a cavity formed by combining two hemispherical or half-capsule structures, and an outwardly expanding, wedge-shaped or arc-shaped receiving surface is arranged on the inner surface of the edge of the first spherical joint or the second spherical joint on the inside. The line connecting the centers of the first spherical joint and the second spherical joint is parallel to the axis of the flat suction nozzle and the dust collector connecting pipe, and the first spherical joint and the second spherical joint can rotate relative to each other along the line connecting the centers thereof.

2. A freely rotatable flat suction structure according to claim 1, characterized in that The centers of the first spherical joint and the second spherical joint coincide, and the first spherical joint and the second spherical joint can rotate relative to each other along any axis.

3. A freely rotatable flat suction structure according to claim 1, characterized in that An annular boss or annular rib is arranged on the outer surface of the edge of the first spherical joint or the second spherical joint on the inside, the annular boss and the annular rib are arranged in a spaced manner and form a mounting groove therebetween, an O-shaped sealing ring is embedded in the mounting groove, and the locking cover is sealingly abutted on the annular boss, the O-shaped sealing ring and the annular rib.

4. A freely rotatable flat suction structure according to claim 3, characterized in that A protective shell is further rotatably and closely sleeved on the first spherical joint, the second spherical joint and the locking cover, a first arc-shaped barrier is arranged at the end of the locking cover, a movable cavity is formed between the first spherical joint or the second spherical joint on the inside and the locking cover and the first arc-shaped barrier, an electromagnet and a sensor are arranged on the outer surface of the first spherical joint or the second spherical joint on the inside in the movable cavity, the electromagnet is connected with the sensor, the sensor corresponds to the first arc-shaped barrier, a second arc-shaped barrier is arranged on the end of the protective shell, and the electromagnet is magnetically connected with a permanent magnet after being electrified.

5. The freely rotatable flat suction structure according to claim 1, wherein The sensor is a piezoresistor.

6. A freely rotatable flat suction structure according to claim 1, characterized in that ​ 7. A freely rotatable flat suction structure according to claim 1, characterized in that ​ 8. A freely rotatable flat suction structure according to claim 1, characterized in that ​ 9. The freely rotatable flat suction structure according to claim 1, wherein ​ 10. A freely rotatable flat suction structure according to claim 9, characterized in that ​

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