Blowing and sucking fan capable of rotating to switch blowing and sucking directions

Abstract

The utility model discloses a blow -suction fan of rotatable switching blows and sucks direction, including handle, air duct and airflow drive arrangement, one end of air duct is equipped with the air inlet, and the other end of air duct is equipped with the air outlet, and the opening direction of air inlet and the opening direction of air outlet are 180 degree arrangement, and the bottom of air duct is fixed with the rotating shaft, and the rotating shaft is inserted from the top of handle and is connected with air duct on handle, and the locking mechanism of locking air duct and handle relative rotation is equipped on handle, and air duct has the blowing state and dust absorption state, and air duct is switched between two states through relative handle 180 degree rotation, when blowing state, the air outlet is towards the front, and the air inlet is towards the back, and the lock block is clamped into first lock groove, when dust absorption state, the air inlet is towards the front, and the air outlet is towards the back, and the lock block is clamped into second lock groove, and the operator holds the mode of operation unchanged under the blowing state and dust absorption state, and greatly facilitates the operation habit of operator.

Description

Technical Field

[0001] This utility model relates to a blower / suction fan, and more particularly to a blower / suction fan with a rotatable switching blowing / suction direction. Background Technology

[0002] The blower / vacuum cleaner mainly consists of a casing, motor, fan blades, dust collection bag, and dust collection pipe. It has two uses: it can be used as a blower to clean fallen leaves and dust in outdoor environments such as courtyards and roads; and with the filter and dust box installed, it can be used as a small vacuum cleaner to clean dust and garbage in indoor environments.

[0003] For example, the blow-and-suction machine disclosed in Chinese utility model patent CN200981986Y includes a main body shell, a power switch on the main body shell, an air inlet and an air outlet on the main body shell. The air inlet is located at the bottom of the main body shell and faces downwards, and the air outlet is located at the front of the main body shell and faces forwards. The air inlet and the air outlet are distributed at a 90-degree angle. A gripping part is provided on the top of the main body shell for holding.

[0004] The existing blowers on the market are mainly centrifugal fans, with the air inlet and outlet crossing at a 90-degree angle. In the two working modes of vacuuming and blowing, the handle can only be oriented in a way that is easy for the operator to grip in one mode. In the other mode, the grip is awkward and uncomfortable, increasing operator fatigue. Utility Model Content

[0005] Based on the existing blowers on the market, which are mainly centrifugal fans with the air inlet and outlet at a 90-degree angle, the two working modes of vacuuming and blowing can only ensure that the handle is easy for the operator to grip in one mode, while the other mode is awkward and uncomfortable, increasing operator fatigue. Therefore, this utility model provides a blower with a rotatable blowing and suction direction switch.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a blower with rotatable switching blowing and suction directions, including a handle, a blower tube, and an airflow driving device. One end of the blower tube has an air inlet, and the other end has an air outlet. The opening direction of the air inlet and the opening direction of the air outlet are arranged at 180°. The airflow driving device is disposed inside the blower tube and is used to generate airflow from the air inlet to the air outlet within the blower tube. A rotating shaft is fixedly provided at the bottom of the blower tube. The rotating shaft is inserted from the top of the handle to rotatably connect the blower tube to the handle. The handle is provided with a locking mechanism for locking the relative rotation of the blower tube and the handle. The locking mechanism includes a locking element. The device includes a return spring, a locking element housed within the handle, and the locking element is movable relative to the handle. The locking element has a sleeve hole through which a rotating shaft passes. A locking block protrudes from the inner wall of the sleeve hole. The outer circumference of the rotating shaft has a first locking groove and a second locking groove, positioned symmetrically on both sides of the rotating shaft. The locking block engages in the first or second locking groove, restricting the air duct's rotation relative to the handle. One end of the locking element extends from the side of the handle and has a pressing part. Pressing the pressing part causes the locking block to move and disengage from the first or second locking groove. The air duct has both a blowing mode and a vacuuming mode, switching between these two modes by rotating 180° relative to the handle. When the air is blowing, the air outlet faces directly forward, the air inlet faces directly backward, and the locking block engages in the first locking groove. In vacuuming mode, the air inlet faces directly forward, the air outlet faces directly backward, and the locking block is engaged in the second locking groove.

[0007] A further preferred embodiment of this utility model is as follows: the handle is provided with a switch for controlling the start and stop of the airflow drive device; the bottom of the handle is provided with a mounting part for detachable connection of the battery pack; the rotating shaft is provided with a wire passage for wiring; the lower end of the rotating shaft is provided with a first channel opening of the wire passage; and the upper end of the rotating shaft is provided with a second channel opening of the wire passage that communicates with the inside of the air duct.

[0008] A further preferred embodiment of this utility model is as follows: the handle is provided with a first limiting block and a second limiting block, and the rotating shaft is provided with a movable block located between the first limiting block and the second limiting block. The movable block, in conjunction with the first limiting block and the second limiting block, limits the maximum angle of rotation of the air blower relative to the handle to 180°. When the air blower rotates relative to the handle until the movable block abuts against the first limiting block, the air blower switches to the blowing state. When the air blower rotates relative to the handle until the movable block abuts against the second limiting block, the air blower switches to the vacuuming state.

[0009] A further preferred technical solution of this utility model is as follows: the outer circumferential surface of the rotating shaft is provided with at least one arc-shaped toothed part, the toothed part is composed of multiple locking teeth, and a tooth groove is formed between two adjacent locking teeth. The handle is provided with a spring piece that cooperates with the locking teeth. One end of the spring piece is fixed on the handle, and the other end of the spring piece falls into the tooth grooves of each level in sequence during the rotation of the air duct relative to the handle.

[0010] A further preferred embodiment of this utility model is as follows: the lower end of the rotating shaft is provided with an outwardly protruding shoulder, and the first limiting block and the second limiting block are positioned above the shoulder.

[0011] A further preferred technical solution of this utility model is as follows: the bottom of the air duct is provided with an upper abutting plane, the rotating shaft protrudes from the upper abutting plane, the top of the handle is provided with a lower abutting plane, the lower abutting plane is provided with a shaft hole, the rotating shaft is inserted into the handle through the shaft hole to rotate and connect the air duct to the handle, and the upper abutting plane and the lower abutting plane abut against each other.

[0012] A further preferred embodiment of this utility model is as follows: the air duct includes a first left half shell and a first right half shell. A connecting seat is provided on the top of the first left half shell and the first right half shell. The connecting seats on both sides are connected by screws after being assembled. A buckle groove is provided at the bottom of the first left half shell and the first right half shell. An elastic buckle that cooperates with the buckle groove is provided between the bottom of the first left half shell and the first right half shell. The elastic buckle has two elastic buckle edges, which are fastened in the two buckle grooves to clamp the bottom of the first left half shell and the first right half shell. The handle includes a second left half shell and a second right half shell. The second left half shell and the second right half shell are fixed by screws after being assembled.

[0013] A further preferred technical solution of this utility model is: the cable passage is provided with a groove, a cable management seat is inserted and fixed in the groove, and the cable management seat is provided with a plurality of cable management holes.

[0014] A further preferred embodiment of this utility model is as follows: the pressing part is a flat button, the locking member has a positioning post at the end away from the button, the handle has a support surface, the reset spring is sleeved on the positioning post, and one end abuts against the locking member, and the other end abuts against the support surface.

[0015] A further preferred embodiment of this utility model is as follows: the locking block includes a first column and a second column. One end of the first column is connected to the inner wall of the sleeve hole, and one end of the second column is connected to the other end of the first column. The outer diameter of the first column gradually decreases from the end connected to the inner wall of the sleeve hole to the end connected to the second column. The second column is a cylinder, and its outer diameter is equal to the smallest outer diameter of the first column. Both the first locking groove and the second locking groove include a first groove segment and a second groove segment. The first groove segment is located outside the second groove segment. The inner diameter of the first groove segment gradually decreases from its outer end to its inner end connected to the second groove segment. The second groove segment is a circular groove, and its inner diameter is equal to the smallest inner diameter of the first groove segment. The outer diameter of the second column is less than or equal to the inner diameter of the second groove segment, and the largest outer diameter of the first column is greater than the smallest inner diameter of the first groove segment.

[0016] Compared with the prior art, the advantages of this utility model are that the air blower is rotatably connected to the handle via a rotating shaft. One end of the air blower is provided with an air inlet, and the other end is provided with an air outlet. The opening direction of the air inlet is arranged at 180° with the opening direction of the air outlet. The air blower has a blowing mode and a vacuuming mode. The air blower switches between the two modes by rotating 180° relative to the handle. In the blowing mode, the air outlet faces forward and the air inlet faces backward, and the locking block is engaged in the first locking groove. In the vacuuming mode, the air inlet faces forward and the air outlet faces backward, and the locking block is engaged in the second locking groove. This ensures that the operator's holding method remains unchanged in both the blowing mode and the vacuuming mode, greatly facilitating the operator's operating habits.

[0017] By setting a sleeve hole on the lock for the rotating shaft to pass through, setting a locking block on the inner wall of the sleeve hole, and setting a first locking groove and a second locking groove on the outer circumferential surface of the rotating shaft to lock in conjunction with the locking block, the locking block can be moved to engage or disengage from the first locking groove or the second locking groove. This locking structure is simple and easy to operate. Attached Figure Description

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0019] Figure 1 This is a schematic diagram showing the combination of the air inlet, air outlet, and external accessories of a blower / suction fan; Figure 2 A schematic diagram of a blower / suction fan in blower mode; Figure 3 A cross-sectional view of a blower / suction fan in blowing mode; Figure 4for Figure 3 Enlarged view of a portion at point A; Figure 5 A cross-sectional schematic diagram showing the movement of the movable block in conjunction with the first and second limit blocks when the blower is in blowing mode; Figure 6 A cross-sectional diagram of the blower / suction fan when the locking mechanism is unlocked; Figure 7 A schematic diagram of a blower / vacuum fan in vacuuming mode; Figure 8 A cross-sectional diagram showing a blower / vacuum fan in vacuuming mode; Figure 9 A cross-sectional schematic diagram showing the movement of the movable block in conjunction with the first and second limiting blocks when the blower is in the dust suction state; Figure 10 This is a schematic diagram of the internal structure of the handle; Figure 11 for Figure 10 A magnified view of section B; Figure 12 Schematic diagram of the ventilation duct structure Figure 1 ; Figure 13 Schematic diagram of the ventilation duct structure Figure 2 ; Figure 14 This is a schematic diagram of the internal structure of the rotating shaft; Figure 15 This is a schematic diagram of the handle's structure; Figure 16 This is a schematic diagram of the lock mechanism.

[0020] In the diagram: 1. Handle; 2. Mounting part; 3. Switch; 4. Locking element; 5. Pressing part; 6. Air outlet; 7. Air cover; 8. Air tube; 9. Vacuum connector; 10. Dust cup assembly; 11. Air outlet; 12. Second locking groove; 13. Sleeve hole; 14. Air inlet; 15. Airflow drive device; 16. Cable passage; 17. Rotating shaft; 18. First locking groove; 19. Locking block; 20. Support surface; 21. First groove segment; 22. Second groove segment; 23. First column; 24. Second column; 25. Return spring; 6. Positioning pin; 27. First limiting block; 28. Movable block; 29. ​​Second limiting block; 30. Spring piece; 31. Tooth; 32. First left half shell; 33. First right half shell; 34. Connecting seat; 35. Clip groove; 36. Rubber plug; 37. Upper abutment plane; 38. Elastic clip; 39. Shoulder; 40. Locking tooth; 41. Tooth groove; 42. Cable management seat; 43. First channel opening; 44. Insert groove; 45. Cable management hole; 46. Second channel opening; 47. Shaft hole; 48. Lower abutment plane; 49. Side opening. Detailed Implementation

[0021] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0022] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0023] Figures 1-16 As shown, the blower fan with rotatable blowing and suction direction switching includes a handle 1, a blower 8 and an airflow drive device 15.

[0024] One end of the air duct 8 is provided with an air inlet 14, and the other end of the air duct 8 is provided with an air outlet 11. The opening direction of the air inlet 14 and the opening direction of the air outlet 11 are arranged at 180°. The airflow driving device 15 is installed inside the air duct 8. The airflow driving device 15 is used to form an airflow from the air inlet 14 to the air outlet 11 inside the air duct 8, so that air can be blown through the air outlet 11 or drawn in through the air inlet 14.

[0025] The airflow drive device 15 includes a motor and a fan blade. The fan blade is an axial flow fan blade. The motor is fixedly installed inside the air duct 8. The fan blade is connected to the output shaft of the motor and can be driven to rotate by the motor. The rotation of the fan blade forms an airflow from the air inlet 14 to the air outlet 11 inside the air duct 8.

[0026] Figures 2-4 , Figures 6-8As shown, a rotating shaft 17 is fixedly installed at the bottom of the air duct 8. The rotating shaft 17 is inserted from the top of the handle 1 to rotatably connect the air duct 8 to the handle 1. The handle 1 is provided with a locking mechanism to lock the air duct 8 and the handle 1 to rotate relative to each other. The locking mechanism includes a locking member 4 and a return spring 25. The locking member 4 is located inside the handle 1 and can move relative to the handle 1. The locking member 4 is provided with a sleeve hole 13 through which the rotating shaft 17 passes. A locking block 19 protrudes from the inner wall of the sleeve hole 13. A first locking groove 18 and a second locking groove 12 are provided on the outer circumferential surface of the rotating shaft 17. The first locking groove 18 and the second locking groove 12 are located symmetrically on both sides of the rotating shaft 17. The locking block 19 is engaged with the first locking groove 18. The second locking groove 12 restricts the rotation of the air duct 8 relative to the handle 1. One end of the locking member 4 extends from the side of the handle 1 and is provided with a pressing part 5. The side of the handle 1 is provided with a side opening 49 for the locking member 4 to extend. When the pressing part 5 is pressed by an external force, the locking member 4 drives the locking block 19 to move, so that the locking block 19 disengages from the first locking groove 18 or the second locking groove 12. At this time, the air duct 8 can be rotated relative to the handle 1 around the rotation axis 17 to adjust the position of the air inlet 14 and the air outlet 11. When the pressing part 5 loses external force, the return spring 25 pushes the locking member 4 to move and reset, so that the locking block 19 is inserted into the corresponding first locking groove 18 or the second locking groove 12 to lock the relative rotation of the handle 1 and the air duct 8.

[0027] This patent provides a sleeve hole 13 on the locking component 4 for the rotating shaft 17 to pass through, a locking block 19 is provided on the inner wall of the sleeve hole 13, and a first locking groove 18 and a second locking groove 12 are provided on the outer circumferential surface of the rotating shaft 17 to engage with and lock the locking block 19. The locking block 19 can be moved to engage or disengage from the first locking groove 18 or the second locking groove 12. This locking structure is simple and easy to operate.

[0028] Figure 16 As shown, the pressing part 5 is a flat button, the locking part 4 has a positioning post 26 at the end away from the button, the handle 1 has a support surface 20, the reset spring 25 is sleeved on the positioning post 26, and one end abuts against the locking part 4, and the other end abuts against the support surface 20, which is used to push the locking part 4 to move and reset.

[0029] The pressing part 5 is located on the rear side of the handle 1, making it easy for the hand to press from behind.

[0030] The length of the sleeve hole 13 in the moving direction of the lock member 4 is greater than the outer diameter of the rotating shaft 17, so that the sleeve hole 13 has a length that allows the rotating shaft 17 to move relatively inside when the lock member 4 is pressed and moved.

[0031] The blower 8 has a blowing mode and a vacuuming mode. The blower 8 switches between the two modes by rotating 180° relative to the handle 1. That is, when the blower 8 is in the blowing mode, rotating it 180° clockwise from bottom to top will switch it to the vacuuming mode.

[0032] When blowing air, the air outlet 11 faces directly forward, the air inlet 14 faces directly backward, and the locking block 19 is engaged in the first locking groove 18.

[0033] When vacuuming, the air inlet 14 faces directly forward, the air outlet 11 faces directly backward, and the locking block 19 is engaged in the second locking groove 12.

[0034] This patent connects the air blower 8 to the handle 1 by rotating it. One end of the air blower 8 is provided with an air inlet 14, and the other end is provided with an air outlet 11. The opening direction of the air inlet 14 and the opening direction of the air outlet 11 are arranged at 180°. The air blower 8 has a blowing mode and a vacuuming mode. The air blower 8 switches between the two modes by rotating 180° relative to the handle 1. In the blowing mode, the air outlet 11 faces forward and the air inlet 14 faces backward, and the locking block 19 is engaged in the first locking groove 18. In the vacuuming mode, the air inlet 14 faces forward and the air outlet 11 faces backward, and the locking block 19 is engaged in the second locking groove 12. This makes the operator's holding method unchanged in the blowing mode and the vacuuming mode, which greatly facilitates the operator's operating habits.

[0035] Figure 14 As shown, the handle 1 is equipped with a switch 3 for controlling the start and stop of the airflow drive device 15. The bottom of the handle 1 is equipped with a mounting part 2 for detachable connection of the battery pack. The rotating shaft 17 is equipped with a wire passage 16. The lower end of the rotating shaft 17 is equipped with a first channel opening 43 of the wire passage 16, and the upper end of the rotating shaft 17 is equipped with a second channel opening 46 of the wire passage 16 that communicates with the inside of the air duct 8. The wires of the air duct 8 can be connected to the handle 1 through the wire passage 16, and the wires inside the handle 1 can also be connected to the air duct 8 through the wire passage 16.

[0036] The cable passage 16 is provided with a groove 44, and a cable management seat 42 is inserted and fixed in the groove 44. The cable management seat 42 has several cable management holes 45. The groove 44 is side-opening, and the second channel opening 46 is opened on the top side wall of the groove 44. The bottom side wall of the groove 44 has a through-hole for the power supply cable to pass through.

[0037] By setting up cable management bracket 42, the wires in the cable passage 16 can be arranged more orderly.

[0038] Figure 5 , Figure 9As shown, the handle 1 is provided with a first limiting block 27 and a second limiting block 29, and the rotating shaft 17 is provided with a movable block 28 located between the first limiting block 27 and the second limiting block 29. The movable block 28 cooperates with the first limiting block 27 and the second limiting block 29 to limit the maximum angle of rotation of the blower 8 relative to the handle 1 to 180°. When the blower 8 rotates relative to the handle 1 until the movable block 28 abuts against the first limiting block 27, the blower 8 switches to the blowing state. When the blower 8 rotates relative to the handle 1 until the movable block 28 abuts against the second limiting block 29, the blower 8 switches to the vacuuming state.

[0039] By abutting the movable block 28 against the first limiting block 27 or the second limiting block 29, the operator can more accurately rotate the blower 8 to the blowing or vacuuming state. In addition, limiting the rotation angle of the blower 8 can prevent the wires in the wire passage 16 from being twisted and broken like a rope.

[0040] Figure 10 , Figure 11 As shown, the outer circumferential surface of the rotating shaft 17 is provided with at least one arc-shaped toothed portion 31. The toothed portion 31 is composed of multiple locking teeth 40. A tooth groove 41 is formed between two adjacent locking teeth 40. The handle 1 is provided with a spring piece 30 that cooperates with the locking teeth 40. One end of the spring piece 30 is fixed to the handle 1. The other end of the spring piece 30 falls into the tooth grooves 41 in sequence during the rotation of the air blower 8 relative to the handle 1. This makes the hand feel a locking sensation during the rotation of the air blower 8 relative to the handle 1. The contact between the spring piece 30 and the locking teeth 40 will produce a "click-click-click" sound, which increases the experience of rotation. In addition, the cooperation between the spring piece 30 and the locking teeth 40 will provide a damping sensation when the air blower 8 rotates relative to the handle 1, preventing the moving block 28 from hitting the first limit block 27 or the second limit block 29 at a relatively fast speed.

[0041] Figure 12 , Figure 13 As shown, the lower end of the rotating shaft 17 is provided with an outwardly protruding shoulder 39. The first limiting block 27 and the second limiting block 29 are positioned above the shoulder 39 to prevent the rotating shaft 17 from detaching upward from the handle 1. The aforementioned toothed portion 31 is provided on the shoulder 39.

[0042] Figure 13 , Figure 15 As shown, the bottom of the air duct 8 is provided with an upper abutment plane 37, the rotating shaft 17 protrudes from the upper abutment plane 37, the top of the handle 1 is provided with a lower abutment plane 48, and a shaft hole 47 is opened on the lower abutment plane 48. The rotating shaft 17 is inserted into the handle 1 through the shaft hole 47 to rotate and connect the air duct 8 to the handle 1. The upper abutment plane 37 and the lower abutment plane 48 abut against each other, and the two abutment planes make the rotation between the air duct 8 and the handle 1 more stable.

[0043] The rotating shaft 17 is integrally formed on the air duct 8. The air duct 8 includes a first left half shell 32 and a first right half shell 33. The top of the first left half shell 32 and the first right half shell 33 are provided with connecting seats 34. The connecting seats 34 on both sides are connected by screws after being assembled. The bottom of the first left half shell 32 and the first right half shell 33 are provided with buckle grooves 35. The bottom of the first left half shell 32 and the first right half shell 33 is provided with elastic clips 38 that cooperate with the buckle grooves 35. The elastic clips 38 have two elastic buckle edges, which are buckled in the two buckle grooves 35 to clamp the bottom of the first left half shell 32 and the first right half shell 33, so that the top and bottom of the first left half shell 32 and the first right half shell 33 are fixed together. The bottom of the first left half shell 32 and the first right half shell 33 are connected by elastic clips 38, so that the bottom of the first left half shell 32 and the first right half shell 33 does not need to be provided with other structures for screw connection, thus avoiding affecting the rotation of the air duct 8 and the handle 1. The remaining portion of the aforementioned groove 35 is filled with a rubber stopper 36.

[0044] Preferably, the elastic clip 38 is U-shaped or C-shaped.

[0045] The handle 1 includes a second left half shell and a second right half shell. The second left half shell and the second right half shell are assembled and fixed by screws, which facilitates the connection between the handle 1 and the air duct 8, as well as the assembly of internal parts.

[0046] The aforementioned locking block 19 includes a first pillar 23 and a second pillar 24. One end of the first pillar 23 is connected to the inner wall of the sleeve hole 13, and one end of the second pillar 24 is connected to the other end of the first pillar 23. The outer diameter of the first pillar 23 gradually decreases from the end connected to the inner wall of the sleeve hole 13 to the end connected to the second pillar 24. The second pillar 24 is a cylinder, and its outer diameter is equal to the minimum outer diameter of the first pillar 23. The first locking groove 18 and the second locking groove 12 both include a first groove segment 21 and a second groove segment 22. The first groove segment 21 is located outside the second groove segment 22. The inner diameter of the first column 24 gradually decreases from the outer end to the inner end connected to the second groove 22. The second groove 22 is a circular groove. The inner diameter of the second groove 22 is equal to the smallest inner diameter of the first groove 21. The outer diameter of the second column 24 is less than or equal to the inner diameter of the second groove 22. The largest outer diameter of the first column 23 is greater than the smallest inner diameter of the first groove 21. When the locking block 19 is engaged with the first locking groove 18 or the second locking groove 12, the second column 24 is inserted into the second groove 22, and the outer surface of the first column 23 abuts against the inner wall of the first groove 21. This structure facilitates the insertion of the locking block 19 into the first locking groove 18 or the second locking groove 12.

[0047] When the blower 8 is switched to the blowing mode, the air inlet 14 is connected to the air cover 7, and the air outlet 11 can be connected to the air outlet head 6 for use as a hair dryer; when the blower 8 is switched to the vacuuming mode, the air inlet 14 is connected to the dust cup assembly 10 through the vacuuming connector 9, and the air outlet 11 is connected to the air cover 7 for use as a vacuum cleaner.

[0048] The foregoing has described the rotatable, switchable blowing and suction direction blower provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are merely for the purpose of helping to understand this utility model and its core ideas. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A blower / vacuum fan with rotatable switching of blowing and suction directions, comprising a handle, a blower tube, and an airflow driving device, characterized in that, The air duct has an air inlet at one end and an air outlet at the other end. The opening direction of the air inlet is 180° to the opening direction of the air outlet. An airflow driving device is installed inside the air duct to create an airflow from the air inlet to the air outlet. A rotating shaft is fixed to the bottom of the air duct and is inserted into the top of the handle to rotatably connect the air duct to the handle. The handle has a locking mechanism that locks the air duct and the handle in relative rotation. The locking mechanism includes a locking element and a return spring. The locking element is located inside the handle and can move relative to the handle. The locking component has a sleeve hole through which the rotating shaft passes. A locking block protrudes from the inner wall of the sleeve hole. The outer circumference of the rotating shaft has a first locking groove and a second locking groove, which are symmetrically positioned on both sides of the rotating shaft. The locking block engages with the first or second locking groove to restrict the rotation of the air blower relative to the handle. One end of the locking component extends from the side of the handle and has a pressing part. When the pressing part is pressed, the locking block moves and disengages from the first or second locking groove. The air blower has a blowing mode and a vacuuming mode, which are switched between by rotating the air blower 180° relative to the handle. When in blowing mode, the air outlet faces directly forward, the air inlet faces directly backward, and the locking block engages in the first locking groove. In vacuuming mode, the air inlet faces directly forward, the air outlet faces directly backward, and the locking block is engaged in the second locking groove.

2. The rotatable blowing and suction fan with switchable blowing and suction direction according to claim 1, characterized in that, The handle is equipped with a switch for controlling the start and stop of the airflow drive device. The bottom of the handle is equipped with a mounting part for detachable connection of the battery pack. The rotating shaft is equipped with a wire passage for wiring. The lower end of the rotating shaft is equipped with a first channel opening of the wire passage, and the upper end of the rotating shaft is equipped with a second channel opening of the wire passage that communicates with the inside of the air duct.

3. The rotatable blowing and suction fan according to claim 1 or 2, characterized in that, The handle is provided with a first limiting block and a second limiting block, and the rotating shaft is provided with a movable block located between the first limiting block and the second limiting block. The movable block, in conjunction with the first limiting block and the second limiting block, limits the maximum angle of rotation of the air blower relative to the handle to 180°. When the air blower rotates relative to the handle until the movable block abuts against the first limiting block, the air blower switches to the blowing mode. When the air blower rotates relative to the handle until the movable block abuts against the second limiting block, the air blower switches to the vacuuming mode.

4. The rotatable blowing and suction fan with switchable blowing and suction direction according to claim 1, characterized in that, The outer circumferential surface of the rotating shaft is provided with at least one arc-shaped toothed section, which is composed of multiple locking teeth. A tooth groove is formed between two adjacent locking teeth. The handle is provided with a spring piece that cooperates with the locking teeth. One end of the spring piece is fixed to the handle, and the other end of the spring piece falls into the tooth grooves of each level in sequence as the air duct rotates relative to the handle.

5. The rotatable blowing and suction fan with switchable blowing and suction direction according to claim 3, characterized in that, The lower end of the rotating shaft is provided with an outwardly protruding shoulder, and the first limiting block and the second limiting block are positioned above the shoulder.

6. The rotatable blowing and suction fan with switchable blowing and suction direction according to claim 1, characterized in that, The bottom of the air duct is provided with an upper abutment plane, and the rotating shaft protrudes from the upper abutment plane. The top of the handle is provided with a lower abutment plane, and a shaft hole is opened on the lower abutment plane. The rotating shaft is inserted into the handle through the shaft hole to rotate and connect the air duct to the handle. The upper abutment plane and the lower abutment plane abut against each other.

7. The rotatable blowing and suction fan with switchable blowing and suction direction according to claim 6, characterized in that, The air duct includes a first left half shell and a first right half shell. Each of the first left half shell and the first right half shell has a connecting seat on its top. The connecting seats on both sides are connected by screws after being assembled. Each of the first left half shell and the first right half shell has a buckle groove at its bottom. An elastic clip that mates with the buckle groove is provided between the bottom of the first left half shell and the first right half shell. The elastic clip has two elastic buckle edges that are fastened into the two buckle grooves to clamp the bottom of the first left half shell and the first right half shell. The handle includes a second left half shell and a second right half shell. The second left half shell and the second right half shell are fixed by screws after being assembled.

8. The rotatable blowing and suction fan with switchable blowing and suction direction according to claim 2, characterized in that, The cable passage is provided with a groove, and a cable management seat is inserted and fixed in the groove. The cable management seat has several cable management holes.

9. The rotatable blowing and suction fan with switchable blowing and suction direction according to claim 1, characterized in that, The pressing part is a flat button. The locking member has a positioning post at the end away from the button. The handle has a support surface. The reset spring is sleeved on the positioning post, with one end abutting against the locking member and the other end abutting against the support surface.

10. The rotatable blowing and suction fan according to claim 1, characterized in that, The locking block includes a first column and a second column. One end of the first column is connected to the inner wall of the sleeve hole, and one end of the second column is connected to the other end of the first column. The outer diameter of the first column gradually decreases from the end connected to the inner wall of the sleeve hole to the end connected to the second column. The second column is a cylinder, and its outer diameter is equal to the smallest outer diameter of the first column. Both the first and second locking grooves include a first groove segment and a second groove segment. The first groove segment is located outside the second groove segment. The inner diameter of the first groove segment gradually decreases from its outer end to its inner end connected to the second groove segment. The second groove segment is a circular groove, and its inner diameter is equal to the smallest inner diameter of the first groove segment. The outer diameter of the second column is less than or equal to the inner diameter of the second groove segment, and the largest outer diameter of the first column is greater than the smallest inner diameter of the first groove segment.

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