Blowing and Suction Device

Abstract

This invention relates to a blowing and suction device, comprising a housing, a fan and a motor installed within the housing, and a working accessory connected to the housing. The housing has an air inlet, an air outlet, and an air duct located at the air outlet. Airflow generated by the motor driving the fan to rotate flows into the housing through the air inlet and out through the air outlet. The working accessory is detachably connected to the air duct. The working accessory has a first locking part, and the air duct has a second locking part that cooperates with the first locking part. The first locking part engages with the second locking part to fix the working accessory to the housing. The blowing and suction device includes a pop-out structure located between the air duct and the working accessory. When the first locking part and the second locking part disengage, the pop-out structure pushes the working accessory away from the housing. This invention, by providing a pop-out structure between the working accessory and the housing, allows the working accessory to automatically pop out under the action of the pop-out structure when the lock between the working accessory and the housing is released, facilitating user replacement of the working accessory.

Description

[Technical Field]

[0001] This invention relates to a blow-suction device, and more particularly to a blow-suction device with quickly detachable and replaceable working accessories. [Background Technology]

[0002] A blower-vacuum device includes a blower and a blower-vacuum machine. A blower-vacuum machine typically includes a housing, a duct connected to the housing, a duct housed within the housing, a motor housed within the duct, and a fan driven by the motor. During use, the motor drives the fan to generate airflow, which is used to blow away or collect fallen leaves. To diversify the power supply options of blowers-vacuum machines and adapt to different user needs, various blowing accessories are commonly available on the market to achieve different functions.

[0003] Chinese Patent Application CN201310397878.9 discloses a blowing and suction device, which includes a main housing, a motor disposed within the main housing, and a fan driven by the motor. The main housing has an air inlet and an air outlet. The blowing and suction device includes several blowing accessories, one of which is selectively connected to the air outlet. The blowing accessories include a short blowing tube, a brush assembly, a flat brush, and a nozzle. A protruding button is provided on the air outlet, and an opening is provided on the blowing accessory. The protruding button and the opening cooperate to allow the blowing accessory to be detachably connected to the air outlet. To avoid radial wobble between the air outlet and the blowing accessory, they are generally achieved through an interference fit. Therefore, it is difficult to disassemble when replacing the blowing accessory, and pressing the button can cause the air outlet or the blowing accessory to deform, thereby increasing the friction between the two and further increasing the difficulty of disassembly.

[0004] Therefore, it is indeed necessary to provide an improved blowing and suction device to overcome the shortcomings of the existing technology. [Summary of the Invention]

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a blow-suction device that allows for quick disassembly and replacement of working accessories.

[0006] The present invention solves the problems of the prior art by adopting the following technical solution: a blowing and suction device, comprising a housing extending axially, a fan and a motor installed in the housing, and a working attachment connected to the axial front end of the housing. The housing has an air inlet located at the axial rear end, an air outlet located at the axial front end, and an air duct section located at the air outlet. The motor is configured to drive the fan to rotate and generate airflow, so that the airflow flows into the housing from the air inlet and flows out from the air outlet. The working attachment is detachably connected to the air duct section. The working attachment has a first locking part located at the axial rear end, and the air duct section has a second locking part that cooperates with the first locking part. The first locking part is engaged with the second locking part to fix the working attachment to the housing. The blowing and suction device includes a pop-out structure located between the air duct section and the working attachment in the housing. The pop-out structure pushes the working attachment in a direction away from the housing. When the first locking part and the second locking part are disengaged, the pop-out structure pushes the working attachment away from the housing.

[0007] A further improvement is as follows: the working attachment is axially connected to the front end of the duct section, and the pop-out structure is disposed on at least one of the working attachment and the duct section.

[0008] A further improvement is as follows: the pop-out structure includes an elastic element located in one of the working attachment and the air duct section, and a pressing element connected to the elastic element. The pressing element moves axially under the action of the elastic element and abuts against the other of the working attachment and the air duct section.

[0009] A further improvement is as follows: the pop-out structure includes a base for accommodating the elastic member and the pressing member, the base having an axially extending cavity, the elastic member and the pressing member being accommodated within the cavity, and one axial end of the elastic member abutting against the inner wall of the cavity while the other axial end abutting against the pressing member.

[0010] A further improvement is as follows: the pop-out structure includes a fixing plate fixed in the base, the fixing plate and the elastic member are respectively located at the two ends of the axial direction of the pressing member, the fixing plate covers the cavity in the axial direction and is provided with a limiting groove communicating with the cavity, and the pressing member passes through the limiting groove in the axial direction and protrudes from the outer surface of the fixing plate.

[0011] A further improvement is that one of the first locking part or the second locking part is configured as a hook extending axially from the outer surface of the fixing plate toward the other, and the other is configured as a slot for holding the hook.

[0012] A further improvement is as follows: the pop-out structure is located at the axial rear end of the working attachment, the base is integrally formed on the outer periphery of the working attachment, and the pressing member abuts against the air duct section.

[0013] A further improvement is as follows: the number of the first locking parts is a pair and they are located on both sides of the pressing member in the transverse direction perpendicular to the axial direction. The first locking part is configured as a hook extending axially from the outer surface of the fixing plate toward the second locking part, and the second locking part is configured as a groove for holding the hook.

[0014] A further improvement is as follows: the blowing and suction device includes an operating part located in the air duct section. The operating part is provided with a button for the user to press, a pair of second locking parts connected to the axial front end of the button, and an extension part located between the pair of second locking parts. The extension part is aligned with the pressing member in the axial direction. When the working accessory is connected to the air duct section, the pressing member abuts against the axial front end of the extension part under the action of the elastic member.

[0015] A further improvement is as follows: the duct section is provided with a transition section and a connecting section arranged axially in front and behind, and a plurality of supporting ribs extending outward from the outer peripheral wall of the transition section. The operating part is provided on the connecting section. When the working accessory is connected to the duct section, the transition section overlaps with the working accessory, and the supporting ribs abut against the inner wall of the working accessory.

[0016] The present invention can also solve the problems of the prior art by adopting the following technical solution: a blowing and suction device, including a housing extending along the axis, a fan and a motor installed in the housing, and a working attachment connected to the front end of the housing along the axis. The housing has an air inlet located at the rear end along the axis, an air outlet located at the front end along the axis, and a duct section located at the air outlet. The motor is configured to drive the fan to rotate and generate airflow, so that the airflow flows into the housing from the air inlet and flows out from the air outlet. The working attachment is detachably connected to the duct section. The working attachment has a first locking device located at the rear end along the axis. The duct section has a second locking device that cooperates with the first locking device. The first locking device is fastened to the second locking device to fix the working attachment to the housing. At least one of the first locking device and the second device has a pop-out structure. The pop-out structure pushes the working attachment in the direction of disengagement from the housing. When the first locking device and the second locking device are disengaged, the pop-out structure pushes the working attachment away from the housing.

[0017] A further improvement is as follows: the pop-out structure includes an elastic element located within the first locking device and a pressing element connected to the elastic element. The pressing element moves axially under the action of the elastic element and abuts against the second locking device.

[0018] A further improvement is as follows: the number of the elastic element and the pressing element are both set to a pair, and the first locking device is provided with a first locking part located between the pair of pressing elements in a transverse direction perpendicular to the axial direction. The first locking part is configured as a hook extending along the axial direction.

[0019] A further improvement is as follows: the second locking device includes a button for the user to press and a second locking part connected to the axial front end of the button, the second locking part being configured as a slot for holding the hook.

[0020] A further improvement is as follows: The second locking device is provided with a pair of extensions located on both sides of the second locking part in the lateral direction. The extensions are aligned with the pressing member in the axial direction. When the working accessory is connected to the air duct part, the pressing member abuts against the axial front end of the extension under the action of the elastic member.

[0021] Compared with the prior art, the present invention has the following advantages: By providing a pop-out structure on the working attachment and / or the housing, when the lock between the working attachment and the housing is released, the working attachment will automatically pop out under the action of the pop-out structure, allowing the user to remove or replace the working attachment with very little force. Furthermore, when removing the working attachment, the user holds the housing with one hand and presses the button with the other hand to release the lock between the first and second locking parts. The working attachment will then automatically pop out from the duct section of the housing and fit freely on the duct section. The user can then easily remove the working attachment with the hand that operates the button. The entire process only requires one-handed operation, making it convenient and quick, greatly improving the user experience. [Attached Image Description]

[0022] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the blowing and suction device in a preferred embodiment of the present invention;

[0024] Figure 2 yes Figure 1 The diagram shown is an exploded view of the blow-suction device after it pops out of the outer shell of the structure.

[0025] Figure 3 yes Figure 2 A cross-sectional view of the blowing and suction device shown;

[0026] Figure 4 yes Figure 3 A partial enlarged view of the ejection structure of the blow-suction device shown;

[0027] Figure 5 yes Figure 1 A partial enlarged view of the ejection structure of the blow-suction device shown;

[0028] Figure 6 yes Figure 1 A cross-sectional view of the blowing and suction device shown;

[0029] Figure 7 yes Figure 6 A magnified view of the pop-out structure of the blow-suction device shown.

[0030] Meaning of the reference numerals in the diagram:

[0031] Blowing and suction device 100, housing 10

[0032] Air inlet 101 Air outlet 102

[0033] Air intake space 103, air duct section 11

[0034] Transition section 111 Connecting section 112

[0035] Support rib 113 Operating part 114

[0036] Cover 115 Mounting hole 116

[0037] Connecting part 12 Battery mounting part 13

[0038] Handle 14 Second locking part 15

[0039] Button 16 Extension 17

[0040] Duct assembly 20 Duct housing 21

[0041] Air duct 22 Motor housing 23

[0042] Cavity 231, Guide Cone 232

[0043] 24 stationary guide vanes, 30 motors

[0044] Motor shaft 31, Fan 40

[0045] Wheel hub 41, fan blade 42

[0046] Working accessories 50, mounting cylinder 51

[0047] Connecting cylinder 52, air outlet 53

[0048] Battery pack 60, air inlet shroud 70

[0049] Main body 71 Air intake area 72

[0050] Air intake 721, grille 722

[0051] Pop-up structure 80 Base 81

[0052] Cavity 811 Fixing plate 82

[0053] Limiting groove 821, elastic element 83

[0054] Pressing component 84, baffle 841

[0055] Pressing part 842 First locking part 85

[0056] Fixing hole 851

Detailed Implementation Methods

[0057] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0058] The terminology used in this invention is for the purpose of describing specific embodiments only and is not intended to limit the invention. For example, terms such as "upper," "lower," "front," "rear," "left," and "right" used below to indicate orientation or positional relationship are based solely on the orientation or positional relationship shown in the accompanying drawings and are only for the purpose of simplifying the description of the invention, and do not indicate or imply that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0059] Please see Figure 1 and Figure 3 As shown, embodiments of the present invention relate to a blower-vacuum device 100, comprising: a housing 10 extending axially, a duct assembly 20 at least partially housed within the housing 10, a motor 30 and a fan 40 mounted within the housing 10, a working attachment 50 connected to the axial front end of the housing 10, and a battery pack 60 providing power to the motor 30. The blower-vacuum device 100 of the present invention can be a blower with a blowing function for garden care, a vacuum cleaner with a suction function for collecting fallen leaves or debris, or a blower-vacuum cleaner possessing both blowing and suction functions. Embodiments of the present invention will be described in detail below using a blower as an example.

[0060] The housing 10 extends axially and has an air inlet 101 at the rear end and an air outlet 102 at the front end. The motor 30 drives the fan 40 to rotate and generate airflow. The airflow flows into the housing 10 from the air inlet 101 and flows out from the air outlet 102 before entering the working accessory 50. The housing 10 includes a duct section 11 located at the air outlet 102, a connecting section 12 extending rearward from the outer peripheral wall of the duct section 11 at its rear end, a battery mounting section 13 connected to the rear end of the connecting section 12, and a handle 14 provided on the top of the connecting section 12 and the battery mounting section 13. The working accessory 50 is detachably connected to the duct section 11. The connecting section 12 consists of a plurality of ribs spaced apart in the circumferential direction. Each connecting section 12 extends from the outer peripheral wall of the duct section 11 toward the battery mounting section 13 to connect the duct section 11 and the battery mounting section 13, and forms an air intake space 103 between the duct section 11 and the battery mounting section 13. The battery pack 60 is detachably connected to the battery mounting section 13 to provide power to the motor 30.

[0061] The blowing and suction device 100 also includes an air inlet shroud 70 located within the air inlet space 103 and detachably mounted to the axial rear end of the duct section 11. The air inlet shroud 70 is located between the air inlet 101 and the air inlet space 103. (Reference) Figure 2 As shown, the air inlet shroud 70 includes an annular body portion 71 connected to the housing 10 and an air inlet area 72 located inside the annular body portion 71. The air inlet area 72 is composed of multiple air inlets 721 and multiple grilles 722, which are used to filter large-volume debris in the airflow.

[0062] refer to Figure 3 As shown, the duct assembly 20 includes a duct housing 21 that houses a motor 30 and a fan 40. The duct housing 21 is cylindrical and has an internal air duct 22 for airflow. The motor 30 and fan 40 are housed within the duct housing 21. The duct housing 21 includes a housing portion for accommodating the motor 30 and fan 40 and a guide portion extending upstream of the housing portion toward the airflow. The housing portion is cylindrical, and the guide portion is conical, including a small-diameter portion connected to the axial rear end of the housing portion and a large-diameter portion that gradually widens from the small-diameter portion, with the opening area of ​​the large-diameter portion being larger than the opening area of ​​the small-diameter portion. In the airflow direction, the guide portion is located upstream of the fan 40 to guide the airflow into the air duct 22. In this embodiment, the guide portion and the duct housing 21 are integrally formed; in other embodiments, the guide portion may be a separate component detachably connected to the duct housing 21 or the housing 10.

[0063] The duct assembly 20 houses the motor housing 23, and the air duct 22 forms the space between the duct housing 21 and the motor housing 23. Figure 6As shown, the motor housing 23 includes a cavity 231 for accommodating the motor 30 and a guide cone 232 connected to the cavity 231. The cavity 231 is provided with multiple stationary guide vanes 24 extending toward the air duct 22. The multiple stationary guide vanes 24 extend into the air duct 22 to cut and organize the airflow entering the air duct 22. The guide cone 232 has a conical structure and multiple airflow holes near the tip. When the airflow in the air duct 22 flows past the tip of the guide cone 232, due to the air pressure difference between the tip of the guide cone 232 and the motor housing 23, the airflow flows into the motor housing 23 through the multiple airflow holes. After passing through the motor 30, it flows out from the gap between the motor housing 23 and the fan 40 and merges into the main airflow in the air duct 22, thereby dissipating heat from the motor 30.

[0064] The motor 30 has a motor shaft 31 extending along the axial direction, and the fan 40 includes a hub 41 connected to the motor shaft 31 and fan blades 42 extending from the hub 41 toward the air duct 22. The motor 30 drives the fan blades 42 to rotate to draw in air and form an airflow.

[0065] Please refer to Figures 2 to 4 As shown, the working attachment 50 is axially connected to the front end of the duct section 11. The working attachment 50 is provided with a first locking device located at the rear end of the axial direction, and the duct section 11 is provided with a second locking device that cooperates with the first locking device. The first locking device engages with the second locking device to fix the working attachment 50 to the housing 10. The blowing and suction device 100 includes a pop-out structure 80 located between the duct section 11 of the housing 10 and the working attachment 50. The pop-out structure 80 may be provided on at least one of the working attachment and the duct section. When the first locking device disengages from the second locking device, the pop-out structure 80 pushes the working attachment 50 away from the housing 10. Specifically, the pop-out structure is provided on at least one of the first locking device and / or the second locking device to generate a repulsive force between the working attachment 50 and the housing 10, so that when the working attachment 50 is removed from the housing 10, the user can easily complete the disassembly work with very little force, which is ergonomic.

[0066] The pop-out structure 80 includes an elastic member 83 located in one of the working attachment 50 and the air duct section 11, and a pressing member 84 connected to the elastic member 83. The pressing member 84 moves axially under the action of the elastic member 83 and abuts against the other of the working attachment 50 and the air duct section 11.

[0067] The pop-out structure 80 can be installed on the first locking device of the working accessory 50, or on the second locking device of the housing 10, or even on both the working accessory 50 and the housing 10. The two pop-out structures 80 cooperate to complete the disassembly of the working accessory 50. Since the structures are quite similar, the following only describes in detail the implementation scheme in which the pop-out structure 80 is installed on the first locking device.

[0068] Please refer to Figures 2 to 5 As shown, the working attachment 50 is configured as a hollow tubular structure, and the pop-out structure 80 is disposed at the axial rear end of the working attachment 50. The pop-out structure 80 includes a base 81 that houses the elastic member 83 and the pressing member 84, and a fixing plate 82 that is at least partially accommodated within the base 81. The base 81 may be integrally formed on the outer periphery of the working attachment 50, or it may be mounted on the outer peripheral wall of the working attachment 50 by means of screws or form-fitting.

[0069] The base 81 has an axially extending cavity 811, in which the elastic member 83 and the pressing member 84 are accommodated. One axial end of the elastic member 83 abuts against the inner wall of the cavity 811, and the other axial end abuts against the pressing member 84. The fixing plate 82 and the elastic member 83 are located at opposite axial ends of the pressing member 84. The fixing plate 82 covers the cavity 811 axially and forms a limiting groove 821 communicating with the cavity 811. The axial front end of the pressing member 84 is connected to the elastic member 83, and the axial rear end abuts against the duct section 11. The pressing member 84 includes a baffle 841 connected to one end of the elastic member 83 and a pressing part 842 extending axially from the baffle 841. The pressing part 842 passes through the limiting groove 821 axially and protrudes from the outer surface of the fixing plate 82.

[0070] refer to Figure 5 As shown, the first locking device has a pair of first locking parts 85, which are located on both sides of the pressing member 84 in the transverse direction perpendicular to the axial direction. The first locking parts 85 are configured to extend axially from the outer surface of the fixing plate 82 toward the second locking device and bend downward at the end to form a hook. The second locking device has a second locking part 15 that cooperates with the first locking parts 85 to lock the working accessory 50 to the air duct portion 11 of the housing 10. The axial front end of the second locking part 15 is configured as a slot for receiving the hook, thereby engaging with the first locking part 85 in the vertical direction perpendicular to the axial direction. The fixing plate 82 also has fixing holes 851 on both sides of the first locking parts 85 for screws (not shown) to pass through, and the screws pass through the fixing holes 851 to install the fixing plate 82 into the base 81.

[0071] Of course, the pop-out structure 80 can also be set on the second locking device. The second locking part 15 is configured as a hook that extends axially from the outer surface of the fixing plate 82 toward the first locking part 85. The axial front end of the first locking part 85 is set as a slot for receiving the hook. Other structures are the same as those in the above embodiment, and will not be described in detail here.

[0072] Combination Figure 7As shown, the second locking device includes an operating part 114 located at the axial front end of the duct section 11. The operating part 114 has a mounting groove, a spring accommodated in the mounting groove, a button 16 with one end connected to the spring and the other end pressable by the user, a pair of second locking parts 15 connected to the axial front end of the button 16, and an extension 17 located between the pair of second locking parts 15. The extension 17 is axially aligned with the pressing part 842. When the working accessory 50 is connected to the duct section 11, the pressing part 842 abuts against the axial front end of the extension 17 under the action of the elastic member 83. The second locking part 15 is integrally formed with the button 16, or it can be connected together in other ways to prevent relative movement. The extension 17 can be integrally formed with the button 16, integrally formed with the operating part 114, or the extension 17 can be omitted, and the pressing member 84 only presses against the outer peripheral wall of the operating part 114. The second locking device also includes a cover 115 for fixing the button 16 to the operation section 114. The cover 115 has mounting holes 116 on both sides for screws (not shown) to pass through. The screws pass through the mounting holes 116 to connect the cover 115 to the outer peripheral wall of the duct section 11.

[0073] Combination Figure 2 As shown, the duct section 11 includes a transition section 111 and a connecting section 112 arranged axially front to back, and a plurality of support ribs 113 extending outward from the outer peripheral wall of the transition section 111. When the working attachment 50 is connected to the duct section 11, the transition section 111 overlaps with the working attachment 50, and the support ribs 113 of the transition section 111 abut against the inner wall of the working attachment 50, avoiding direct contact between the tubular working attachment 50 and the tubular duct section 11, thereby reducing wear between the two. The button 16 and the second locking part 15 are both provided on the connecting section 112.

[0074] Please refer to Figure 3 and Figure 4 As shown, when the working attachment 50 is not connected to the duct section 11 of the housing 10, the elastic member 83 is in a freely extended state, and the pressing member 84 does not extend beyond the rear end edge of the base 81 in the axial direction. When the working attachment 50 is connected to the duct section 11 of the housing 10, the first locking part 85 and the second locking part 15 engage with each other, thereby locking and fixing the working attachment 50 and the duct section 11. At this time, the front end of the extension 17 presses against the pressing member 84 of the pop-up structure 80 in the axial direction. The pressing member 84 moves forward and compresses the elastic member 83. That is, when the working attachment 50 is installed on the duct section 11 of the housing 10, the elastic member 83 is always in a compressed state.

[0075] Please refer to Figure 5 and Figure 6As shown, when the user needs to replace or disassemble the working accessory 50, pressing the button 16 on the air duct section 11 compresses the spring and drives the hook of the second locking part 15 to move downward together, causing the second locking part 15 to disengage from the first locking part 85 and releasing the fastening state between the working accessory 50 and the air duct section 11 of the housing 10. The elastic member 83 is released from the axial restriction and pushes the pressing member 84 backward. Due to the large weight of the housing 10, the working accessory 50 is ejected away from the housing 10 under the elastic force of the elastic member 83 and detaches from the housing 10. The user can remove the working accessory 50 from the housing 10 without using much force.

[0076] In addition, when removing the working accessory 50, one hand holds the handle 14 while the other hand presses the button 16 to release the latch between the first locking part 85 and the second locking part 15. The working accessory 50 will then automatically pop out a distance from the air duct part 11 of the housing 10. Since the transition section 111 of the air duct part 11 overlaps with the working accessory 50, the automatically popped-out working accessory 50 is unrestrainedly fitted on the transition section 111. The hand that operates the button 16 can easily remove the working accessory 50. The whole process only requires one-handed operation, which is convenient and quick, greatly improving the user experience.

[0077] Please see Figures 1 to 3 As shown, the working accessory 50 is composed of a multi-segment tubular air blower, including a mounting cylinder 51 connected to the air duct section 11 and overlapping with the transition section 111 when installed to the housing 10, a connecting cylinder 52 extending axially forward from the mounting cylinder 51, and an air outlet duct 53 connected to the front end of the connecting cylinder 52. The mounting cylinder 51 and the connecting cylinder 52 are designed as a single unit, and the diameter of the mounting cylinder 51 is larger than the diameter of the connecting cylinder 52. The air outlet duct 53 is detachably connected to the connecting cylinder 52, and the diameter of the air outlet duct 53 gradually decreases from back to front. The airflow generated by the rotation of the fan 40 enters the air inlet 101 of the housing 10, flows into the air duct 22 of the duct assembly 20, is guided by the guide cone 232, enters the mounting cylinder 51 and the connecting cylinder 52 of the working accessory 50, and then flows out after being converged by the air outlet duct 53, thereby improving the blowing efficiency.

[0078] The working attachment 50 is not limited to the aforementioned blower structure. It can also be one or more of the following: a long tube for cleaning eaves or higher work areas; a short tube for cleaning sofas or balconies indoors; a brush for cleaning window frames or corners; or an air nozzle for inflating the inflation device. Users can switch between different working attachments 50 according to the actual usage scenario. This invention greatly facilitates the replacement of the blower / suction device 100 with these different working attachments 50 by using a pop-out structure 80 that generates repulsive force between the working attachment 50 and the housing 10.

[0079] In the above embodiment, the elastic element 83 and the pressing element 84 are both single and located in the middle of the first locking device. However, in other embodiments, the elastic element 83 and the pressing element 84 can also be a pair, with the first locking part 85 positioned between the two pressing elements 84, that is, the pressing elements 84 are located on both sides of the first locking part 85 in the transverse direction perpendicular to the axial direction. The second locking device is provided with a pair of extensions 17, and the second locking part 15 is positioned in the middle of the pair of extensions 17. By having the pair of elastic elements 83 act on the pair of pressing elements 84 to press against the extensions 17, a greater repulsive force is obtained between the working attachment 50 and the housing 10, making it easier to replace the working attachment 50.

[0080] The blow-suction device 100 described above has the pop-out structure 80 mounted on the working accessory 50, and the pop-out structure 80 and the button 16 are separate. In other blow-suction devices 100, the pop-out structure 80 and the button 16 can also be mounted on the housing 10 or the working accessory 50 simultaneously to achieve the pop-out effect. The simple positional change of the pop-out structure 80 will not be described in detail here.

[0081] This invention is not limited to the specific embodiments described above. Those skilled in the art will readily understand that many other alternatives exist without departing from the principles and scope of this invention. The scope of protection of this invention is determined by the claims.

Claims

1. A blowing and sucking device comprising a housing extending in an axial direction, a fan and a motor mounted in the housing, and a working attachment connected to an axial front end of the housing, the housing being provided with an air inlet at an axial rear end, an air outlet at the axial front end, and an air duct portion at the air outlet, the motor being arranged to drive the fan to rotate to generate an air flow so that the air flow flows into the housing from the air inlet and flows out from the air outlet, the working attachment being detachably connected to the air duct portion, the working attachment being provided with a first locking portion at an axial rear end, the air duct portion being provided with a second locking portion cooperating with the first locking portion, the first locking portion being engaged with the second locking portion to fix the working attachment to the housing; characterized in that: The ejecting structure is arranged on at least one of the working attachment and the air pipe portion, and the first locking portion and the second locking portion are buckled to each other, and the elastic member is in a compressed state. When the first locking portion and the second locking portion are unbuckled, the working attachment is separated from the shell in the axial direction under the elastic force of the elastic member.

2. The blowing and sucking device according to claim 1, characterized in that: The working attachment is connected to the front end of the air pipe portion in the axial direction, and the ejecting structure is arranged on at least one of the working attachment and the air pipe portion.

3. The blowing and sucking device according to claim 2, characterized in that: The ejecting structure comprises a pressing member connected to the elastic member, and the pressing member moves in the axial direction under the action of the elastic member and abuts against the other of the working attachment and the air pipe portion.

4. The blowing and sucking device according to claim 3, characterized in that: The ejecting structure comprises a base portion accommodating the elastic member and the pressing member, the base portion is provided with a cavity extending in the axial direction, the elastic member and the pressing member are accommodated in the cavity, and one end of the elastic member abuts against the inner wall of the cavity and the other end abuts against the pressing member.

5. The blowing and sucking device according to claim 4, characterized in that: The ejecting structure comprises a fixed plate fixed in the base portion, the fixed plate and the elastic member are respectively located at the two ends of the pressing member in the axial direction, the fixed plate covers the cavity in the axial direction and is provided with a limiting groove communicating with the cavity, the pressing member passes through the limiting groove in the axial direction and protrudes from the outer surface of the fixed plate.

6. The blowing and sucking device according to claim 5, characterized in that: One of the first locking portion or the second locking portion is a hook extending in the axial direction from the outer surface of the fixed plate towards the other, and the other is a clamping groove clamping the hook.

7. The suction and blowing device according to claim 5, characterized in that: The ejecting structure is arranged at the axial rear end of the working attachment, the base portion is integrally formed on the outer periphery of the working attachment, and the pressing member abuts against the air pipe portion.

8. The blowing and sucking device according to claim 7, characterized in that: The number of the first locking portions is a pair and they are respectively located at the two sides of the pressing member in the transverse direction perpendicular to the axial direction, the first locking portion is a hook extending in the axial direction from the outer surface of the fixed plate towards the second locking portion, and the second locking portion is a clamping groove clamping the hook.

9. The blowing and sucking device according to claim 8, characterized in that: The ejecting structure is arranged on the operating portion of the air pipe portion, the operating portion is provided with a button pressed by a user, a pair of the second locking portions connected to the axial front end of the button, and an extension portion between the pair of the second locking portions, the extension portion is aligned with the pressing member in the axial direction, and the pressing member abuts against the axial front end of the extension portion under the action of the elastic member when the working attachment is connected to the air pipe portion.

10. The suction and blowing device according to claim 9, characterized in that The air pipe portion is provided with a transition section and a connecting section arranged in front and back in the axial direction, and a plurality of support ribs extending outward from the outer peripheral wall of the transition section, the operating portion is arranged on the connecting section, the transition section overlaps the working attachment when the working attachment is connected to the air pipe portion, and the support ribs abut against the inner wall of the working attachment.

11. A blowing and sucking device comprising a housing extending in an axial direction, a fan and a motor mounted in the housing, and a working attachment connected to an axial front end of the housing, the housing being provided with an air inlet at an axial rear end, an air outlet at the axial front end, and an air duct portion at the air outlet, the motor being arranged to drive the fan to rotate to generate an air flow so that the air flow flows into the housing from the air inlet and flows out from the air outlet, the working attachment being detachably connected to the air duct portion, the working attachment being provided with a first locking device at an axial rear end, the air duct portion being provided with a second locking device cooperating with the first locking device, the first locking device being engaged with the second locking device to fix the working attachment to the housing; characterized in that: At least one of the first locking device and the second locking device is provided with an ejection structure which pushes the working attachment in a direction away from the housing, the ejection structure comprising an elastic member on at least one of the working attachment and the air pipe portion, the elastic member being in a compressed state when the first locking device and the second locking device are buckled to each other; When the first locking device and the second locking device are unbuckled, the working attachment is axially separated from the housing under the elasticity of the elastic member.

12. The suction and blowing device according to claim 11, characterized in that The ejection structure comprises a pressing member connected to the elastic member, the pressing member moving axially under the action of the elastic member and abutting against the second locking device.

13. The suction and blowing device according to claim 12, characterized in that The number of the elastic member and the pressing member is set to one pair, the first locking device being provided with a first locking portion between the one pair of pressing members in a transverse direction perpendicular to the axial direction, the first locking portion being configured as a hook extending in the axial direction.

14. The suction and blowing device according to claim 13, characterized in that The second locking device comprises a button for being pressed by a user and a second locking portion connected to an axial front end of the button, the second locking portion being configured as a clamping groove clamping the hook.

15. The suction and blowing device according to claim 14, characterized in that The second locking device is provided with a pair of extension portions respectively on both sides of the second locking portion in the transverse direction, the extension portions being aligned with the pressing members in the axial direction, the pressing members abutting against axial front ends of the extension portions under the action of the elastic member when the working attachment is connected to the air pipe portion.

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