CN113116223B

CN113116223B - Hand-held dust suction device

Info

Publication number: CN113116223B
Application number: CN202110422865.7A
Authority: CN
Inventors: 钱洪
Original assignee: Ningbo Troika Science & Technology Co ltd
Current assignee: Ningbo Troika Science & Technology Co ltd
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2022-12-27
Anticipated expiration: 2041-04-20
Also published as: CN113116223A

Abstract

The invention discloses a multi-stage linkage telescopic assembly, a telescopic dust collection pipe unit and handheld dust collection equipment, wherein the multi-stage linkage telescopic assembly comprises a fixed rod, a first movable rod, a second movable rod and a bendable rigid connecting piece, wherein the fixed rod, the first movable rod and the second movable rod are sequentially spaced and can relatively move in parallel; the rear end of the first movable rod is fixedly provided with a linkage seat, one end of a rigid connecting piece is connected to the fixed rod, the rigid connecting piece movably penetrates through the linkage seat backwards, and the other end of the rigid connecting piece is connected to the second movable rod, so that the fixed rod, the first movable rod and the second movable rod are connected with each other through the rigid connecting piece, and the first movable rod and the second movable rod are made to stretch synchronously. Therefore, the use of parts such as a motor and the like is reduced, so that the total weight of the equipment is light, and the equipment is beneficial to long-time use of a user; secondly, the working efficiency of the telescopic operation of the telescopic dust absorption pipe is obviously improved; and because the first movable rod is closer to the host, the driving is more labor-saving and convenient by operating the first movable rod.

Description

Hand-held dust suction device

Technical Field

The invention relates to the field of dust collectors, in particular to a multi-stage linkage telescopic assembly of a telescopic dust collection pipe unit of handheld dust collection equipment.

Background

A hand-held cleaner device basically comprises a cleaner main body, a cleaner head such as a floor brush, and a cleaner pipe for communicating the cleaner head with the cleaner main body.

For example, in patent document CN108392135A, a rod-shaped dust suction pipe is connected to a dust suction main unit to form a long suction pipe, so that the handheld dust suction apparatus can work as a long-connection handheld dust suction apparatus. The dust absorption pipe in this patent is a whole section of hard pipe, so accomodate, carry inconveniently, also can't adjust dust absorption pipe length according to the particular case of operating space during the use.

For example, patent documents CN110099697A and CN 106419748A disclose that a tube member formed by stretching is connected to a dust suction nozzle, a guide member is disposed on one side of the tube member, the guide member includes a plurality of guide units, the guide units are movably connected to each other, the last guide unit is connected to a belt, the belt is controlled by a motor to retract and release the belt, so as to control and drive the last guide unit to stretch and retract other guide units step by step, thereby realizing stretching and retracting of the guide member to drive stretching and retracting of the tube member.

In the above patent document, the length variation of the dust suction pipe is solved by the extension and contraction of the guide member and the guide pipe member, but the provision of the motor and the belt retracting and releasing mechanism not only increases the weight of the hand-held dust suction apparatus, making the cleaning work of the user more laborious, but also increases the production cost of the hand-held dust suction apparatus.

Disclosure of Invention

The invention aims to solve the technical problem of providing a multi-stage linkage telescopic assembly capable of manually driving the telescopic dust suction pipe of the handheld dust suction equipment, the multi-stage linkage telescopic assembly is simple in structure and stable in operation, and further provides a telescopic dust suction pipe unit comprising the multi-stage linkage telescopic assembly and the handheld dust suction equipment.

The technical scheme adopted by the invention for solving the technical problems is as follows: the multi-stage linkage telescopic assembly is used for driving the telescopic dust suction pipe of the handheld dust suction equipment to stretch and retract, and comprises a fixed rod, a first movable rod, a second movable rod and a bendable rigid connecting piece, wherein the fixed rod, the first movable rod and the second movable rod are sequentially spaced and can relatively move in parallel;

the rear end of the first movable rod is fixedly provided with a linkage seat, the fixed rod is provided with a first connecting point positioned in front of the linkage seat, and the second movable rod is provided with a second connecting point positioned in front of the linkage seat;

one end of the rigid connecting piece is connected with the first connecting point, the rigid connecting piece movably penetrates through the linkage seat backwards, and the other end of the rigid connecting piece is connected with the second connecting point, so that the fixed rod, the first movable rod and the second movable rod are connected with each other by the rigid connecting piece;

when the first movable rod moves forwards or backwards by a distance of L1, the rigid connecting piece is driven by the linkage seat on the first movable rod, the second movable rod is synchronously pushed forwards or pulled backwards by the rigid connecting piece by a distance of L2, and the moving distance L2 is greater than L1.

The invention adopts a further preferable technical scheme for solving the technical problems as follows: the rigid connecting piece is a strip-shaped metal piece or plastic piece, is rigid in the axial direction so as to be capable of always realizing force transmission, and has certain flexibility in the radial direction and can be bent and deformed.

The invention adopts a further preferable technical scheme for solving the technical problems as follows: the fixing rod, the first movable rod and the second movable rod are tubular parts which are mutually sleeved, the inner diameter of the fixing rod is larger than the outer diameter of the first movable rod, the inner diameter of the first movable rod is larger than the outer diameter of the second movable rod, the fixing rod, the first movable rod and the second movable rod are basically equal in length, and the L2 is approximately twice of the L1.

The invention adopts a further preferable technical scheme for solving the technical problems as follows: one end of the rigid connecting piece is connected to the front end of the fixed rod, and the other end of the rigid connecting piece is connected to the rear end of the second movable rod.

The invention adopts a further preferable technical scheme for solving the technical problems as follows: the front part of the first movable rod is provided with a telescopic operation part which is always exposed, and a user applies force to the telescopic operation part to move the first movable rod.

The invention adopts a further preferable technical scheme for solving the technical problems as follows: the linkage seat is internally provided with a guide structure wound with a rigid connecting piece, and the guide structure is a wheel structure rotating around a fixed shaft.

The invention adopts a further preferable technical scheme for solving the technical problems as follows: the rear end of the second movable rod is provided with a fixing piece for fixing the rigid connecting piece, the outer surface of the fixing piece is provided with a protruding part protruding outwards, and the protruding part reduces the moving gap between the first movable rod and the second movable rod.

The invention adopts a further preferable technical scheme for solving the technical problems as follows: the outer diameter of the linkage seat is larger than the outer diameter of the first movable rod and smaller than the inner diameter of the fixed rod.

Another protection topic of the present invention is: telescopic dust absorption pipe unit, including scalable dust absorption pipe and the flexible subassembly of multistage linkage, the flexible subassembly's of multistage linkage dead lever be fixed in the dust absorption host computer on, the flexible subassembly's of multistage linkage second movable rod the front end connect in the front end of scalable dust absorption pipe, the flexible subassembly of multistage linkage drive scalable dust absorption pipe flexible.

Another protection topic of the present invention is: the handheld dust collection equipment comprises a dust collection main machine and the telescopic dust collection pipe unit.

Compared with the prior art, the invention has the advantages that the fixed rod, the first movable rod and the second movable rod are mutually associated by utilizing the rigid connecting piece, so that the second movable rod is synchronously stretched when the first movable rod is manually driven. Therefore, the use of parts such as a motor and the like is reduced, so that the total weight of the equipment is light, and the equipment is beneficial to long-time use of a user; secondly, synchronous extension and retraction of the two movable rods are realized in a short time, and the working efficiency of extension and retraction operation of the telescopic dust collection pipe is obviously improved; and because the first movable rod is closer to the host, the driving is more labor-saving and convenient by operating the first movable rod.

Drawings

The present invention will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of illustrating the preferred embodiments and therefore should not be taken as limiting the scope of the invention. Furthermore, unless specifically stated otherwise, the drawings are merely schematic representations based on conceptual representations of elements or structures depicted and may contain exaggerated displays and are not necessarily drawn to scale.

FIG. 1 is a perspective view illustrating a retracted state of a suction pipe of a hand-held cleaner according to a preferred embodiment of the present invention;

FIG. 2 is a top view of a retracted state of a suction pipe of the hand-held cleaner according to the preferred embodiment of the present invention;

FIG. 3 is a cross-sectional view illustrating a retracted state of a suction pipe of the hand-held cleaner according to the preferred embodiment of the present invention;

FIG. 4 is a first enlarged partial schematic view of the hand-held cleaner device of FIG. 3 in accordance with a preferred embodiment of the present invention;

FIG. 5 is a second enlarged partial schematic view of the hand-held cleaner device of FIG. 3 in accordance with the preferred embodiment of the present invention;

FIG. 6 is a schematic enlarged view of a third portion of the hand-held cleaner device of FIG. 3 in accordance with a preferred embodiment of the present invention;

FIG. 7 is a perspective view illustrating a retracted state of a suction pipe of the hand-held cleaner according to the preferred embodiment of the present invention;

FIG. 8 is a plan view illustrating an extended state of a suction pipe of the hand-held cleaner according to the preferred embodiment of the present invention;

FIG. 9 is a sectional view illustrating an extended state of a suction pipe of the hand-held cleaner according to the preferred embodiment of the present invention;

FIG. 10 is an exploded schematic view of a hand-held vacuum cleaner of a preferred embodiment of the present invention;

FIG. 11 is a view showing the state of the rigid link in the retracted state of the suction pipe according to the preferred embodiment of the present invention;

FIG. 12 is a view showing the state of the rigid link member in an extended state of the suction pipe according to the preferred embodiment of the present invention;

FIG. 13 is a schematic view showing the position change of the rods of the telescopic movement of the linkage telescopic assembly according to the preferred embodiment of the present invention.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the description is illustrative only, and is not to be construed as limiting the scope of the invention.

It should be noted that: like reference numerals refer to like items in the following figures, and thus, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "inner", "outer", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally placed when the products of the present invention are used, and are only used for convenience of description and simplification of the description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed and operated in specific orientations, and thus, should not be construed as limiting the present invention. As shown in fig. 1 and 3, the handheld dust suction device comprises a traction assembly 100, a retractable dust suction pipe 200 with a linear air flow channel T, and a dust suction main unit a coaxially formed by a dust box assembly 300 and a fan 400, which are sequentially arranged from top to bottom.

As shown in fig. 3 and 10, the traction assembly 100 is composed of a plurality of rigid movable rods 101 which are sequentially spaced and can relatively move back and forth in parallel; in the extended state, the front end of the movable rod 101 located at the foremost side is connected to the front end of the retractable dust pipe 200, so that the retractable movement of the drawing unit 100 draws the retractable dust pipe to be linearly extended and retracted forward and backward.

Also, as shown in fig. 1 and 3, the retractable dust suction pipe 200 includes an air inlet 1 and an air outlet 2, and the dust box assembly 300 includes an air inlet 3 butted against the air outlet 2. During dust collection, the fan 400 operates to generate negative pressure in the air duct in front of the fan to generate suction force, so that external air flow is sucked from the air inlet 1 of the retractable dust collection pipe 200 along the linear air flow channel T, enters the dust box assembly 300 from the joint of the air outlet 2 and the air inlet 3, is filtered by the dust box assembly 300, and is discharged from the air outlet 6 of the fan 400.

The whole handheld dust collection equipment is more compact in structure and more reasonable in layout due to the arrangement, the influence of the traction assembly 100 on the air channel arrangement of the handheld dust collection equipment is avoided, the air outlet 2 of the linear airflow channel T is directly butted with the air inlet 3 of the dust collection host A, the airflow turns less, the air flow path is shorter, the airflow resistance is reduced, the loss of negative pressure suction is reduced, and the suction of the handheld dust collection equipment is improved.

It should be noted that the movable rod 101 of the pulling assembly 100 is a rigid member and thus remains rigid in its extended state, thus supporting the retractable dust extraction tube 200. The elongated retractable dust suction hose 200 supported by the traction assembly 100 forms a hand-held dust suction apparatus for long distance dust suction in combination with the dust suction main body a; when the traction assembly 100 drives the retractable dust pipe 200 to retract, the dust pipe is suitable for short-distance dust collection and is more convenient to carry and store.

Preferably, as shown in fig. 1, 3, 7, 9, and 10, the tow assembly 100 includes a securing bar 102. The fixed rod 102 is provided with a containing groove M with an opening at the front side, and the movable rod 101 retracts into the containing groove M. The fixing rod 102 is provided with a holding portion 500 above, the holding portion 500 includes a holding section 501 and a connecting section 502, the holding section 501 and the extending axis of the device form an inclined angle, the rear end of the holding section 501 is connected to the rear section of the fixing rod 102, and the front end of the holding section 501 is connected to the connecting section 502 extending from the front section of the fixing rod 102. The connecting section 502, the holding section 501 and the fixing rod 102 are enclosed to form a triangular structure. The cross-section of the connecting section 502 and the holding section 501 is in the shape of a sort of oval, which is more suitable for a user to hold the device for a long time.

As shown in fig. 2, the upper surface of the connection section 502 of the handle 500 is provided with a plurality of control buttons K. The control button K may be a shift switch and an on-off switch for controlling the fan 400, or a control switch for an electrically driven traction assembly. When the user grips the handheld dust collecting equipment with one hand, the thumb can press the control button K, and the control is realized while cleaning, so that the operation is more convenient and easier, and the experience feeling is better.

As shown in fig. 1 and 10, a power supply part 600 with a storage battery 601 is arranged at the rear side of the dust collection main machine a, so that the center of gravity is close to a user, and the user can use the dust collection main machine a more easily and conveniently.

Preferably, the power supply part 600 is provided with a battery holder 602 accommodating the secondary battery 601, the battery holder having a battery container with an upper side opened, the secondary battery 601 being removably mounted in the battery container 602. When charging is needed, the storage battery 601 can be pulled out from the opening to realize independent charging, and is inserted into the battery groove 602 from top to bottom after charging is completed. Therefore, the handheld dust suction equipment is convenient for a user to charge.

As a more preferable embodiment, as shown in fig. 1 and 3, the extension direction of the dust suction main body a coincides with the extension direction of the retractable dust suction pipe 200, and the fan 400 is located at the rear side of the dust box assembly 300. So set up for dust absorption host computer A's air current route is unanimous with straight line airflow channel T's extending direction, has further reduced the air current and has turned, thereby reduces the windage, guarantees that the air current is smooth and easy, reduces the loss of negative pressure suction in the conduction process, improves the dust absorption ability of equipment. In addition, still make the outward appearance more pleasing to the eye clean and tidy like this for structural configuration is more reasonable, and equipment transverse dimension is littleer, the use and the accomodating of the equipment of being convenient for.

Specifically, as shown in fig. 3, 7 and 10, the retractable dust suction pipe 200 includes a retractable pipe 201 on the front side and a rigid pipe 202 on the rear side. The telescopic pipe 201 can be driven by the traction assembly 100 to be telescopic, and the rigid pipe 202 is connected to the dust collection main machine A to play a role in fixing and supporting.

The telescopic pipe 201 is internally provided with a first air flow passage T1 extending along an axial line, the rigid pipe 202 is internally provided with a second air flow passage T2, and the first air flow passage T1 and the second air flow passage T2 both extend along a straight line and are butted to form the straight air flow passage T.

As shown in fig. 3, the dust box assembly 300 is disposed below the rigid tube 202, the air outlet 2 is disposed on the lower surface of the rigid tube 202, the air inlet 3 is disposed on the upper surface of the dust box assembly 300, and the air outlet 2 is in butt joint with the air inlet 3, so as to achieve air flow communication between the retractable dust suction tube 200 and the main dust suction machine a.

Preferably, the bellows 201 is a flexible bellows, further preferably, the flexible bellows 201 may be a flexible bellows member of a known type. In order to improve the extending performance of the flexible extension tube 201, the flexible extension tube 201 of the present embodiment includes a flexible tube with air tightness and a spiral rigid support, so that the flexible extension tube 201 can be better contracted along the axis by the cooperation of the two.

Further, as an alternative embodiment, the telescopic part of the telescopic dust suction hose 200 may be provided in the form of a tubular structure comprising a plurality of tubular units telescopically movable relative to each other. The telescopic movement of the tubular unit allows for the required extensibility or stretchability of the telescopic suction tube 200.

Further preferably, as shown in fig. 6, 7 and 10, the front side of the telescopic tube 201 is provided with a nozzle part 7, and preferably, the front end of the traction assembly is connected to the nozzle part 7. The nozzle part 7 can be directly used for contacting the object to be cleaned to perform dust collection operation, and can also be detachably connected with a floor brush or other dust collection accessories in a thread way, a buckle way and the like so as to be suitable for different use scenes.

When in use, dust and impurities on the ground surface can be sucked into the inside of the floor brush along with air, and are upwards sucked by the air flow and enter the linear air flow channel T of the telescopic dust suction pipe 200 from the suction nozzle part 7. The dust-containing air enters the dust box assembly 300 through the butt joint of the air outlet 2 and the air inlet 3 to form clean air after dust removal, and then is exhausted back to the atmosphere, and dust and impurities are retained in the dust box assembly 300.

In the scheme of using the flexible extension tube 201, the flexible extension tube 201 is easy to bend and deform in the extension process, so that the flexible extension tube is clamped, and the flexible dust suction tube 200 is not smooth in movement. As shown in fig. 7, in the present embodiment, a plurality of guide sleeves 8 are disposed on the movable rod 101 of the traction assembly 100 along the telescopic direction, and the guide sleeves 8 are mounted at the front end of the movable rod. The flexible telescopic pipe 201 is sleeved in the guide sleeve 8, the guide sleeve 8 reduces the bending of the flexible telescopic pipe 201 and guides the flexible telescopic pipe 201 to extend linearly, so that the flexible telescopic pipe 201 can extend or contract more flexibly.

As shown in fig. 3, as a specific embodiment of the rigid tube 202, the rigid tube 202 includes a front section provided with the second air flow path T2 and a rear section for connecting the dust suction main unit a. The air outlet 2 is positioned at the tail end of the second airflow channel T2, and the front end of the rear section part is provided with a wind shielding surface 9 facing the linear airflow channel T. The wind-shielding surface 9 is arranged to prevent the air flow from diffusing backward, reduce the negative pressure loss, and divert the air flow entering from the second air flow path T2 and block the impurities with a large volume. Thereby preventing the air containing dust or foreign matters in the linear airflow channel T from being directly thrown to the filtering part 302 of the dust box assembly 300, reducing the filtering load carried by the filtering part 302, ensuring that the surface of the filter screen is not easy to be occupied by dust, improving the dust collection effect and reducing the cleaning load.

Preferably, as shown in fig. 10, the rigid tube 202 is a flat rod-shaped body, the lower surface of which is provided with a recessed area Y, and the upper surface of the dust box assembly 300 is fitted in the recessed area Y. By adopting the mode, the structure between the main dust collection machine A and the telescopic dust collection pipe 200 is more compact, the appearance of the dust collection equipment is neat and beautiful, the concave area Y of the rod-shaped body plays a role in supporting the dust box assembly 300, and the connection stability is improved.

As shown in fig. 3, the dust box assembly 300 includes a cylindrical member 301 and a filter member 302 located inside the cylindrical member 301, and the fan 400 includes a housing 401 and a fan main body 402. The fan body 402 is disposed coaxially with the filter member 302.

Further, the filter member 302 is disposed at a rear end of the tubular member 301, an air outlet is disposed at a rear end of the tubular member 301, the filter member 302 extends into the airflow cavity of the tubular member 301 from the air outlet, an air exhaust channel of the handheld dust collector is formed from the air inlet 3 to the airflow cavity and then to the air outlet 4, and the fan 400 operates in the airflow cavity of the dust box assembly 300 to form a negative pressure, so that air in the airflow cavity is drawn into the fan 400 through the air exhaust channel.

In addition, the casing 401 of the fan 400 has an airflow transition cavity, the fan main body 402 is located in the airflow transition cavity, the front end of the casing 401 is provided with an air inlet, and the two side walls of the casing 401 are provided with air outlets 6. An air exhaust channel of the handheld dust collecting device is formed from the air inlet to the airflow cavity and then to the air outlet 6, and air in the fan 400 is exhausted out of the device through the air exhaust channel.

Preferably, as shown in fig. 1 and 3, the housing 401 of the blower 400 is a cylindrical structure, and the cylindrical member 301 of the dirt box assembly 300 and the housing 401 of the blower 400 are cylindrical structures extending along the same axis. The outer surface of the dirt box assembly 300 is substantially flush with the outer surface of the fan 400 to further enhance the aesthetics of the device.

As shown in fig. 6, as an embodiment of the dirt tray assembly 300, an opening for pouring dirt and dust is provided at the front end of the cylindrical member 301, and one end of the cover G is hinged to the opening of the cylindrical member 301; the other end of the lid body G is locked to the tubular member 301 by the locking assembly 9 to close the opening, and the locking assembly 9 is unlocked so that the lid body G can be opened from the front end of the tubular member 301 to pour out the dust inside the tubular member 301. Thus, the dust box assembly 300 can be cleaned without being detached from the equipment, so that the dust box assembly is more convenient and faster to use.

Preferably, the locking assembly 9 is a push-type or slide-type locking structure. Further, the lower surface of the cover G is provided with a button for unlocking the locking assembly 9. The upper part of the lid G is hinged to the upper edge of the tubular member 301 and the locking assembly 9 is disposed at the lower edge of the tubular member 301.

It should be appreciated that the activation of the activation lever 101 of the tow assembly 100 in this embodiment may be electrically or manually activated. The electric drive will inevitably require equipment such as motors, not only further increasing the weight of the equipment, making the cleaning operation of the user more laborious, but also increasing the production cost of the handheld dust collecting equipment. The movable manner of the movable rod 101 may be a plurality of manners such as synchronous expansion and contraction, independent expansion and contraction, or sequential expansion and contraction. And synchronous flexible its flexible efficiency of stretching out and drawing back for other flexible modes is higher for the user uses equipment light more and saves time.

Therefore, the traction assembly 100 provided in this embodiment is a multi-stage linkage telescopic assembly that can be driven manually and synchronously telescopic. As shown in fig. 1-5 and 9-12, the multi-stage linkage telescopic assembly further includes two movable rods 101 besides the fixed rod 102: a first movable bar 101a and a second movable bar 101b, and a bendable rigid link 103.

The rear end of the first movable rod 101a is fixedly provided with a linkage seat 11, the fixed rod 102 is provided with a first connection point C located in front of the linkage seat 11, and the second movable rod 101b is provided with a second connection point D located in front of the linkage seat 11. One end of the rigid connecting member 103 is connected to the first connecting point C, the rigid connecting member 103 movably penetrates through the linkage base 11 backwards, and the other end of the rigid connecting member 103 is connected to the second connecting point D, so that the fixed rod 102, the first movable rod 101a and the second movable rod 101b are connected to each other by the rigid connecting member 103.

Fig. 13 demonstrates the position change of each rod of the telescopic movement of the multi-stage linkage telescopic assembly, wherein the dotted line frame of the upper part is the original positions of the three rods, and the solid line frame of the lower part is the relative positions of the three rods after movement. It can be seen that when the first movable bar 101a moves forwards or backwards by a distance of L1, the rigid link 103 is driven by the linkage seat 11 on the first movable bar 101a, the second movable bar 101b is synchronously pushed forwards or pulled backwards by the rigid link 103 by a distance of L2, and the distance L2 of movement is greater than L1.

Such an arrangement makes it easier and faster for the user to extend and retract the retractable dust suction pipe 200. The advantages of which are explained in detail below.

In the conventional technical solution, the movable rods 101 are independent from each other, so that they need to be individually deployed or retracted; or the movable rods 101 are linked and limited, and are unfolded or retracted one by one in a front-back sequence. In any of the above modes, the problems of low efficiency and inconvenient operation exist.

In addition, in the technical scheme of electric drive, a motor and other components with relatively large weight are generally required to be arranged in a matched manner, so that the weight of the dust collection equipment is greatly increased, and a larger burden is brought to the cleaning operation of a user; and the arrangement of the motor also increases the production cost of the dust collecting equipment, which is not beneficial to the market popularization of the dust collecting equipment. In addition, the problem that the traction assembly 100 is not stable enough to extend and retract due to the fact that the transmission mechanism is blocked because the motor runs unstably in the process of driving the transmission mechanism by the motor also exists.

In the technical scheme of manual driving, the second movable rod 101b must be manually extended or retracted, and the extended second movable rod 101b is far away from the handheld portion 500, so that the user needs to bend down to perform the operation, which is very laborious and inconvenient. Even in the case where the distance from the second movable bar 101b to the hand-held portion 500 is greater than the reach of a single arm of an adult, the user cannot perform the telescopic operation of the telescopic dust suction pipe 200 using the traction assembly 100 while holding the dust suction apparatus.

In the solution of the present embodiment, since the rigid connection member 103 simultaneously associates the fixed rod 102, the first movable rod 101a and the second movable rod 101b with each other, the first movable rod 101a and the second movable rod 101b are extended and retracted synchronously. When the first movable bar 101a is manually driven to extend outwards, the second movable bar 101b is synchronously pushed forwards by the rigid connecting piece 103, and the moving amplitude is larger than that of the first movable bar 101a, so that the first movable bar 101a and the second movable bar 101b finally extend out of the first movable bar 101a and reach the maximum length simultaneously; accordingly, when the first movable bar 101a is manually driven to retract inwardly, the second movable bar 101b is simultaneously retracted with the first movable bar 101 a. Therefore, the two movable rods 101 can be extended and retracted in a short time, and the working efficiency of the extension and retraction operation of the telescopic dust suction pipe 200 is remarkably improved. And the first movable rod 101a is closer to the handheld part 500, so that the traction assembly 100 is more labor-saving and convenient to drive.

In this embodiment, the rigid connection member 103 is a strip-shaped metal or plastic member, the rigid connection member 103 is rigid in the axial direction so as to always realize the force transmission, and has a certain flexibility in the radial direction so as to be able to be bent and deformed, thereby being able to move around the linkage seat 11.

As shown in fig. 3, 4 and 6, preferably, the fixed lever 102, the first movable lever 101a and the second movable lever 101b are tubular members, the inner diameter of the fixed lever 102 is larger than the outer diameter of the first movable lever 101a, and the inner diameter of the first movable lever 101a is larger than the outer diameter of the second movable lever 101 b. The first movable rod 101a is sleeved in the fixed rod 102, and the second movable rod 101b is sleeved in the first movable rod 101 a.

Preferably, the fixed bar 102, the first movable bar 101a and the second movable bar 101b are substantially equal in length, and the gap between the fixed bar 102, the first movable bar 101a and the second movable bar 101b is small, approximately 2-5 mm, which is much smaller than the single bar length of the fixed bar 102, the first movable bar 101a and the second movable bar 101 b.

Further, one end of the rigid link 103 is connected to the front end of the fixed lever 102, and the other end of the rigid link 103 is connected to the rear end of the second movable lever 101b, so that L2 is approximately twice as large as L1.

As shown in fig. 5, 7 and 10, a telescopic operation portion 13 is provided at a front portion of the first movable rod 101a, the telescopic operation portion 13 is a handle held by a hand, and a user applies force to the telescopic operation portion 13 to move the first movable rod 101a, thereby performing telescopic operation on the telescopic dust suction pipe 200.

Preferably, the front ends of the fixed rod and each section of movable rod are provided with positioning seats which are matched with each other, and each two positioning seats are provided with positioning buckle structures which are matched with each other in pairs, so that the traction assembly can be directly fixed when retracted.

As shown in fig. 4, 11 and 12, the interlocking seat 11 may be integrally formed with the first movable bar 101a or may be fixedly mounted as a separate component at the rear end of the second movable bar 101 b. The linkage seat 11 comprises an installation cavity, in order to make the movement of the rigid connecting piece 103 smoother, a guide structure 11a surrounding the rigid connecting piece 103 and a belt groove 11c beside the guide structure 11a for the movement of the rigid connecting piece 103 are arranged in the linkage seat 11, the rigid connecting piece 103 is arranged in the belt groove in a penetrating way, and the side surface of the rigid connecting piece is tightly attached to the guide structure 11a. The guide structure 11a has a circular arc surface in contact with the rigid link 103, and the rigid link 103 turns around the circular arc surface and moves smoothly.

More preferably, the guiding structure 11a is a wheel structure rotating around a fixed shaft, and the round arc surface of the wheel structure is rotated by friction force, so that the rigid connecting member 103 can move back and forth more smoothly.

As shown in fig. 4 and 10, the rear end of the second movable rod 101b is preferably provided with a fixing member 14 for fixing the rigid connection member 103. The stationary member 14 may be integrally formed with the second movable bar 101b or fixedly assembled as a separate part at the rear end of the second movable bar 101 b.

Further, the outer diameter of the linkage base 11 is larger than the outer diameter of the first movable bar 101a and smaller than the inner diameter of the fixed bar 102. The outer surface of the stationary member 14 has a boss portion 14a protruding outward, and the boss portion 14a reduces a moving gap between the first movable bar 101a and the second movable bar 101 b. Therefore, the part of the linkage base 11 exceeding the outer diameter of the first movable rod 101a and the protruding part 14a of the fixed part 14 play a role in guiding the movement of the corresponding movable rod 101, and the first movable rod 101a and the second movable rod 101b are prevented from being inclined and clamped in the movement process.

In this embodiment, in order to control the telescopic length of the telescopic dust pipe 200, a multi-step positioning structure may be disposed between any two adjacent rods including the fixing rod 102, and the multi-step positioning structure limits the relative movement of the two adjacent rods to prevent the telescopic movement of the traction assembly 100, so as to adjust the telescopic dust pipe 200 to a corresponding telescopic range.

As shown in fig. 10, the second movable rod 101b is provided with at least two positioning holes 15 which are arranged in parallel along the axial direction, the front end of the first movable rod 101a is provided with a positioning element (not shown) which is matched with the positioning holes 15, and the positioning element is inserted into the positioning holes 15 so as to lock the telescopic length of the traction assembly 100.

Preferably, the front end of the first movable rod 101a is provided with an operating button F which is always exposed and controls the positioning element to move, and the operating button F controls the positioning element to move along the radial direction, so as to realize the clutch with the positioning hole 15 and realize the multi-stage adjustment of the retractable dust absorption pipe 200.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "connected", mounted "and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

The multi-stage linkage telescopic assembly, the telescopic dust suction pipe unit and the handheld dust suction device provided by the invention are described in detail, specific examples are applied in the description to explain the principle and the implementation mode of the invention, and the description of the embodiments is only used for helping to understand the invention and the core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. The handheld dust collection equipment is characterized by comprising a multi-stage linkage telescopic assembly, a telescopic dust collection pipe and a dust collection host, wherein the multi-stage linkage telescopic assembly is sequentially arranged from top to bottom;

the multi-stage linkage telescopic assembly comprises a fixed rod, a first movable rod, a second movable rod and a bendable rigid connecting piece, wherein the fixed rod, the first movable rod and the second movable rod are sequentially spaced and can relatively move in parallel;

the rear end of the first movable rod is fixedly provided with a linkage seat, and a guide structure and a belt groove for the movement of the rigid connecting piece are arranged in the linkage seat;

the fixed rod is provided with a first connecting point positioned in front of the linkage seat, and the second movable rod is provided with a second connecting point positioned in front of the linkage seat;

one end of the rigid connecting piece is connected with a first connecting point, the rigid connecting piece can movably penetrate into the belt groove backwards, and the side surface of the rigid connecting piece is tightly attached to the guide structure;

the other end of the rigid connecting piece penetrates through the linkage seat and is connected to the second connecting point, so that the fixed rod, the first movable rod and the second movable rod are connected with each other by the rigid connecting piece;

the outer diameter of the linkage seat is larger than the outer diameter of the first movable rod and smaller than the inner diameter of the fixed rod;

the fixed rod is fixed with the rigid pipe at the rear section of the telescopic dust collection pipe, and the front end of the second movable rod is connected with the front end of the flexible telescopic pipe at the front section of the telescopic dust collection pipe;

the front ends of the first movable rod and the second movable rod are provided with guide sleeves distributed along the telescopic direction, and the flexible telescopic pipe at the front end of the telescopic dust collection pipe is sleeved in the guide sleeves;

when the first movable rod moves forwards or backwards by a distance of L1, the rigid connecting piece is driven by the linkage seat on the first movable rod, the second movable rod is synchronously pushed forwards or pulled backwards by the rigid connecting piece by a distance of L2, and the moving distance L2 is greater than L1;

the multi-stage linkage telescopic assembly is used for stretching and retracting to pull the flexible telescopic pipe to linearly stretch back and forth so as to realize the switching between long-distance dust collection and short-distance dust collection.

2. The handheld vacuum apparatus of claim 1, wherein the rigid connection member is a strip-shaped metal or plastic member, the rigid connection member is rigid in an axial direction so as to always achieve force transmission, and the rigid connection member has a certain flexibility in a radial direction and can be bent and deformed.

3. The hand-held dust suction device as claimed in claim 1, wherein the stationary bar, the first movable bar and the second movable bar are tubular members engaging each other, the stationary bar has an inner diameter larger than an outer diameter of the first movable bar, the first movable bar has an inner diameter larger than an outer diameter of the second movable bar, the stationary bar, the first movable bar and the second movable bar are substantially equal in length, and L2 is substantially twice L1.

4. The hand-held vacuum cleaner as claimed in claim 1, wherein one end of the rigid link is connected to a front end of the stationary shaft, and the other end of the rigid link is connected to a rear end of the second movable shaft.

5. The hand-held dust suction device as claimed in claim 1, wherein a telescopic operation part is provided at a front portion of the first movable rod to be always exposed, and a user applies force to the telescopic operation part to move the first movable rod.

6. The hand-held cleaning device of claim 1, wherein the guide structure is a wheel structure that rotates about a fixed axis.

7. The hand-held dust suction device as claimed in claim 3, wherein a fixing member for fixing the rigid connection member is provided at a rear end of the second movable bar, and an outer surface of the fixing member has a protrusion protruding outward, the protrusion reducing a moving gap between the first movable bar and the second movable bar.