CN219637784U - Knapsack blower - Google Patents

Abstract

The utility model relates to a backpack hair dryer, which comprises a backpack component and an air duct component. The air duct component sequentially includes a bent tube, a flexible tube and a straight tube. The two ends of the flexible tube are respectively connected with the bent tube and the straight tube. It is connected with the backpack component. There is a handle on the straight pipe. There is a hoop between the handle and the straight pipe. The hoop is set on the straight pipe. The hoop and the straight pipe can move relatively. The upper end of the hoop is connected to the handle. The bottom is provided with a first guide platform, and the lower end of the hoop is provided with a first guide groove matched with the first guide platform. The backpack hair dryer obtained by the utility model has the following advantages: the position of the handle can be adjusted freely on the straight pipe, which is convenient to use.

Description

backpack hair dryer

technical field

The utility model relates to the technical field of hair dryers, in particular to a backpack hair dryer.

Background technique

In garden machinery, the blower is used to blow away the debris on the ground. The blower usually includes: a body, a shell covering the body, and an air outlet pipe sleeved at the front end of the body. Generally speaking, the air outlet pipe and the body are It is one piece and cannot be disassembled.

In the prior art, for example, the Chinese invention patent CN 105952672 A discloses a backpack hair dryer, including an axial flow fan assembly, including an air inlet, an air inlet pipe, and a motor duct assembly. The air outlet, the air inlet pipe and the motor duct assembly form an axial flow air duct, the axis of the axial flow air duct is parallel to the horizontal line; the power assembly provides the power source for the axial flow fan assembly; the blow pipe assembly includes bent pipes and straight pipes One end of the curved pipe is connected to the air outlet of the motor duct assembly, and the straight pipe is connected to the other end of the curved pipe through the flexible pipe; the strap assembly carries the axial flow fan assembly and the power assembly on the back of the human body through the strap assembly. The blowpipe assembly of the backpack hair dryer is equipped with a control handle assembly, but the most suitable holding distance of the control handle assembly is different when used by different users or at different angles of the blowpipe, which makes it easy to use the handle at an inappropriate distance. Fatigue, increased workload.

Utility model content

An object of the present application is to provide a backpack hair dryer, which can adjust the position of the handle.

Another object of the present application is to provide a backpack hair dryer with a simple structure.

The technical solution adopted in this application is: a backpack hair dryer, including a backpack assembly and an air duct assembly, the air duct assembly sequentially includes an elbow, a hose and a straight pipe, and the two ends of the hose are respectively connected to the elbow and the straight pipe, The other end of the bent pipe is connected with the backpack component. There is a handle on the straight pipe. A hoop is set between the handle and the straight pipe. The hoop is set on the straight pipe. The hoop and the straight pipe can move relatively. The upper end of the hoop and the handle connection, the bottom of the straight pipe is provided with a first guide platform, and the lower end of the hoop is provided with a first guide groove matched with the first guide platform.

Compared with the prior art, the advantage of this application is that the handle is connected to the straight pipe through the hoop, and the hoop can move on the straight pipe, so that the handle can also move, so that the user can adjust according to his own needs, which is convenient for the adjustment of the handle. Grab, improve the comfort of use, the cooperation of the first guide platform and the first guide groove makes the hoop unable to rotate freely, thereby preventing the handle from rotating freely, and can only be adjusted along the direction of the first guide platform to ensure the handle stability.

In some embodiments of the present application, the hoop is provided with a locking piece, and the locking piece and the hoop are rotatably connected through a rotating shaft. The locking piece includes a locking end close to the rotating shaft and a handle end far away from the rotating shaft. The rotating shaft reaches The maximum distance of the locking end is greater than the minimum distance from the rotating shaft to the first guide table or the straight pipe, and the minimum distance from the rotating shaft to the locking end is smaller than the minimum distance from the rotating shaft to the first guiding table or the straight pipe;

Smooth transition between the end of the maximum distance from the rotating shaft to the locking end and the minimum distance from the rotating shaft to the locking end;

The lower part of the hoop is provided with a groove, and the locking part is arranged in the groove;

When the locking part is in the locked state, an abutment surface is provided between the locking part and the hoop.

In some embodiments of the present application, the handle is rotatably connected to the hoop, and the handle is provided with a depressible locking button. One end of the locking button extends out of the hoop, and the other end is inside the handle. The locking button is provided with locking teeth. , the teeth are evenly distributed around the rotation center of the handle, the handle and the hoop are respectively provided with a first groove and a second groove, the first groove and the second groove are both matched with the teeth, and the first groove is on the vertical plane The projection on is the same as the projection of the second card slot on the vertical plane;

A first return spring is arranged between the locking button and the inner wall of the handle, and the setting direction of the first returning spring is the same as the pressing direction of the locking button.

In some embodiments of the present application, the straight pipe is provided with an upper stop ring and a lower stop ring, the first guide platform is arranged between the upper stop ring and the lower stop ring, and the outer diameter of the upper stop ring and the lower stop ring Both are larger than the inner diameter of the hoop, and the hoop is designed in separate parts.

In some embodiments of the present application, the backpack assembly includes a host, and the host is provided with a mounting sleeve that fits with the elbow, and one end of the elbow is passed through the mounting sleeve, and the mounting sleeve is provided with a buckle facing the elbow. There is a buckle groove on the elbow to cooperate with the buckle;

The installation sleeve is provided with a limiting groove facing the elbow, the part of the buckle is set in the limiting groove, and a second return spring is arranged between the buckle and the installation sleeve, and the movement direction of the second return spring is towards the elbow;

A flow guide is arranged in the installation sleeve, and the elbow is arranged between the installation sleeve and the flow guide;

Buckles are set on the upper and lower ends of the installation sleeve;

The two sides of the installation sleeve are provided with second guide grooves, and the elbow is provided with a second guide platform matched with the second guide grooves.

Further, a safety switch is provided on the installation sleeve, and the safety switch is set toward the direction of the elbow, a pressing piece is provided between the safety switch and the elbow, and a third return spring is provided between the pressing piece and the installation sleeve. The movement direction of the three return springs is toward the departure direction of the elbow, and when the elbow is fully inserted into the installation sleeve, the safety switch contacts and triggers the pressing piece.

In some embodiments of the present application, the straight pipe includes a first air pipe, a second air pipe and a detachable and replaceable air pipe head, the air pipe head is sleeved on the second air pipe, and the second air pipe is sleeved on the On the first air duct, the end of the first air duct facing the second air duct is provided with at least two upward first protrusions, a third locking groove is formed between two adjacent first protrusions, and the second air duct A first positioning device capable of self-resetting toward the first air duct is provided on the top, and the first positioning device cooperates with the third card slot.

Further, the second air duct is provided with a third guide groove, and the first air duct is provided with a third guide platform matched with the third guide groove;

A fixed ring is provided between the first air pipe and the second air pipe, and the fixed ring is passed through the second air pipe.

Further, one end of the second air duct facing the air duct head is provided with a second protrusion and a second retaining ring, the second protrusion is arranged between the second retaining ring and the end of the second air duct, and the second A fourth locking groove is formed between the protrusion and the second retaining ring, and the air duct head is provided with a second positioning device capable of self-resetting toward the second air duct, and the second positioning device cooperates with the fourth locking slot.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment 1;

Fig. 2 is the exploded view of the utility model embodiment 1;

Fig. 3 is a schematic diagram of the installation structure of the branch assembly of the utility model embodiment 1;

Fig. 4 is the sectional view of A-A direction in Fig. 3;

Fig. 5 is the sectional view of B-B direction in Fig. 3;

Fig. 6 is an enlarged view of part C in Fig. 5;

Fig. 7 is an enlarged view of part D in Fig. 5;

Fig. 8 is a schematic diagram of the installation structure of the handle and hoop of Embodiment 1 of the present invention;

Fig. 9 is a schematic diagram of the position-limiting structure of the buckle in Embodiment 1 of the present utility model;

Fig. 10 is a schematic structural view of the handle of Embodiment 1 of the present utility model;

Fig. 11 is a schematic structural view of the lock button in Embodiment 1 of the present utility model;

Fig. 12 is a schematic structural view of the hoop of Embodiment 1 of the present utility model;

Fig. 13 is a schematic structural view of an elbow in Example 1 of the utility model;

Fig. 14 is a schematic structural view of the backpack assembly of Embodiment 1 of the present utility model;

Fig. 15 is a schematic structural view of the first air duct in Embodiment 1 of the present utility model;

Fig. 16 is a schematic structural view of the second air duct in Embodiment 1 of the present utility model;

Fig. 17 is a schematic structural view of the air duct head in Embodiment 1 of the present utility model.

In the figure: 1. Backpack assembly; 2. Air duct assembly; 3. Elbow pipe; 4. Hose; 5. Straight pipe; 6. Handle; 7. Hoop; 8. First guide platform; 9. First guide Slot; 10, locking piece; 11, rotating shaft; 12, locking end; 13, handle end; 14, groove; 15, contact surface; 16, locking button; 18b, the second card slot; 19, the first return spring; 20, the upper retaining ring; 21, the lower retaining ring; 22, the host; 23, the installation sleeve; 24, buckle; 25, buckle groove; 26, limit groove ; 27, the second return spring; 28, the deflector; 29, the second guide groove; 30, the second guide platform; 31, the safety switch; 32, the pressing member; 33, the third return spring; 34, the rotating shaft; 35 , shaft groove; 36, rotating ring; 37, ring groove; 38, first air duct; 39, second air duct; 40, air duct head; 41, first bump; 42, third card slot; 43, The first positioning device; 44, the third guide groove; 45, the third guide platform; 46, the fixed ring; 47, the second bump; 48, the second retaining ring; 49, the fourth card slot; 50, the second positioning Device; 51. Straps.

Detailed ways

In order to further explain the technical means and effects of the utility model to achieve the intended purpose of the utility model, the specific implementation, structure, features and effects of the utility model will be described in detail below in conjunction with the accompanying drawings and preferred embodiments. As later.

Example 1:

A backpack hair dryer provided in this embodiment, as shown in Figure 1 and Figure 8, includes a backpack assembly 1 and an air duct assembly 2, the air duct assembly 2 sequentially includes an elbow 3, a hose 4 and a straight pipe 5, and the soft The two ends of the pipe 4 are respectively connected with the bent pipe 3 and the straight pipe 5, the other end of the bent pipe 3 is connected with the backpack assembly 1, the straight pipe 5 is provided with a handle 6, and a hoop 7 is arranged between the handle 6 and the straight pipe 5. The hoop 7 is sleeved on the straight pipe 5, and the hoop 7 and the straight pipe 5 can move relatively. A guide platform 8 is matched with a first guide groove 9 . The handle 6 is used to control the start, stop and speed regulation of the machine. The handle 6 is connected to the straight pipe 5 through the hoop 7. The hoop 7 can move on the straight pipe 5, so that the handle 6 can also move, so that the user can Adjust to facilitate the grasping of the handle 6 and improve the comfort of use. The cooperation of the first guide table 8 and the first guide groove 9 makes the hoop 7 unable to rotate freely, thereby preventing the handle 6 from freely rotating. The direction of the first guide table 8 is adjusted to ensure the stability of the handle 6 .

In this embodiment, the hose 4 is a corrugated tube.

For the handle 6 to be used reliably, as shown in Figure 3 and Figure 4, a locking member 10 is provided on the hoop 7, and the locking member 10 is rotationally connected with the hoop 7 through a rotating shaft 11, and the locking member 10 includes a The locking end 12 and the handle end 13 away from the rotating shaft 11, the maximum distance from the rotating shaft 11 to the locking end 12 is greater than the minimum distance from the rotating shaft 11 to the first guide table 8 or the straight pipe 5, and the minimum distance from the rotating shaft 11 to the locking end 12 The distance is less than the minimum distance from the rotating shaft 11 to the first guide table 8 or the straight pipe 5 . The locking piece 10 is used to fixedly connect the hoop 7 with the straight pipe 5 to prevent the hoop 7 from moving freely. The locking piece 10 is rotatably connected with the hoop 7 so that the locking piece 10 can rotate. The locking end 12 is used for pressing and locking. The end 13 is used for customer operation, the handle end 13 is far away from the rotating shaft 11, which can make the rotation of the handle end 13 more labor-saving, and it is convenient for the user to pull the handle end 13 to adjust the locking end 12. The maximum distance from the rotating shaft 11 to the locking end 12 is greater than the rotation The minimum distance from the shaft 11 to the first guide table 8 or the straight pipe 5 can ensure that the locking end 12 can be pressed to the first guide table 8 or the straight pipe 5, so that the locking member 10 presses the first guide table 8 or the straight pipe 5 , the fixing of the hoop 7 is completed, the minimum distance from the rotating shaft 11 to the locking end 12 is less than the minimum distance from the rotating shaft 11 to the first guide table 8 or the straight pipe 5, and it can be ensured that the locking end 12 can be aligned with the first guide table 8 Or the straight pipe 5 leaves a distance so that the locking member 10 is separated from the first guide table 8 or the straight pipe 5 so that the hoop 7 can move on the straight pipe 5 .

In order to fix the locking end 12 reliably, there is a smooth transition between the end of the largest distance from the rotating shaft 11 to the locking end 12 and the end of the smallest distance from the rotating shaft 11 to the locking end 12 . The smooth transition of the locking end 12 can ensure smooth locking and opening of the hoop 7 .

For reliable use, a groove 14 is provided at the lower part of the hoop 7 , and the locking member 10 is arranged in the groove 14 . The locking piece 10 is arranged in the groove 14, which is more beautiful, has better protection, and prevents accidental touch.

For reliable use, when the locking member 10 is in a locked state, an abutment surface 15 is provided between the locking member 10 and the hoop 7 . The design of the abutment surface 15 makes the locking member 10 abut against the hoop 7 after locking, so that the user can realize that the locking has been completed, and prevent the locking from exceeding, causing damage to the first guide table 8 or the straight pipe 5, or exceeding the locking. range, making the lock fail.

In this embodiment, the maximum distance from the rotating shaft 11 to the locking end 12 is greater than the minimum distance from the rotating shaft 11 to the first guide table 8, and the minimum distance from the rotating shaft 11 to the locking end 12 is smaller than the distance from the rotating shaft 11 to the first guiding table 8. shortest distance. The locking end 12 acts on the first guide platform 8, which can make the locking more reliable. The tube wall of the straight tube 5 is thinner, and the locking is easy to the straight tube 5, which can reduce the impact on the straight tube 5.

In order to facilitate the adjustment of the handle 6, as shown in Figure 10, Figure 11 and Figure 12, the handle 6 is rotationally connected with the hoop 7, and the handle 6 is provided with a depressible locking button 16, and one end of the locking button 16 extends out of the hoop 7 Outside, the other end is inside the handle 6, the lock button 16 is provided with latching teeth 17, the latching teeth 17 are evenly distributed around the rotation center of the handle 6, the handle 6 and the hoop 7 are respectively provided with a first latching groove 18a and a second latching groove 18b, the first locking groove 18a and the second locking groove 18b are both engaged with the locking teeth 17, and the projection of the first locking groove 18a on the vertical plane is the same as the projection of the second locking groove 18b on the vertical plane. The handle 6 can rotate relative to the hoop 7, so that the angle of the handle 6 can be adjusted, and the user can adjust to a comfortable holding angle when using it at different angles. The locking button 16 is used to lock the rotation angle of the handle 6. , pull out the locking button 16 outward, the locking teeth 17 on the locking button 16 snap into the first locking groove 18a and the second locking groove 18b, so that the locking button 16 is fixed with the handle 6 and the hoop 7, so that the handle 6 cannot rotate freely. When unlocking, press the lock button 16 inward, so that the locking teeth 17 are separated from the first locking groove 18a and the second locking groove 18b. At this time, the handle 6 can rotate freely relative to the hoop 7. Specifically, the lower part of the handle 6 is provided with an outwardly protruding rotating shaft 34 , the hoop 7 is provided with a shaft groove 35 that matches the rotating shaft 34 , the opposite side of the rotating shaft 34 is provided with a rotating ring 36 , and the hoop 7 is provided with The ring groove 37 matched with the rotating ring 36 leaves a gap between the locking button 16 and the inner wall of the handle 6 .

In order to ensure reliable locking of the adjusting handle 6 , a first return spring 19 is provided between the locking button 16 and the inner wall of the handle 6 , and the first returning spring 19 is set in the same direction as the pressing direction of the locking button 16 . The design of the first return spring 19 can ensure that the locking button 16 keeps moving toward the outside, so that the locking tooth 17 is fixed and stable with the first locking groove 18 a and the second locking groove 18 b.

In order to prevent the handle 6 from coming out, as shown in Figure 15, the straight pipe 5 is provided with an upper stop ring 20 and a lower stop ring 21, and the first guide platform 8 is arranged between the upper stop ring 20 and the lower stop ring 21, and the upper stop ring 20 and the lower stop ring 21 The outer diameters of the retaining ring 20 and the lower retaining ring 21 are all greater than the inner diameter of the hoop 7, and the hoop 7 is designed separately. The upper stop ring 20 is used to prevent the handle 6 from coming out from above, and the lower stop ring 21 is used to stop the handle 6 from coming out from below.

For reliable connection between the backpack assembly 1 and the air duct assembly 2, as shown in Figure 2, Figure 5, Figure 6, and Figure 14, the backpack assembly 1 includes a host 22 and a strap 51, and the host 22 is provided with a fitting that cooperates with the elbow 3. The installation sleeve 23 is installed on the installation sleeve 23 at one end of the elbow 3 . The installation sleeve 23 is provided with a buckle 24 facing the elbow 3 , and the elbow 3 is provided with a buckle groove 25 matched with the buckle 24 . The installation sleeve 23 is used to connect with the elbow 3, and the elbow 3 part is set in the installation sleeve 23, the overall protection is good, the connection is reliable, the buckle 24 and the buckle groove 25 cooperate, so that the elbow 3 can be connected with the installation sleeve 23 reliable. Specifically, the main engine 22 is provided with a working motor, fan blades, etc., and the handle 6 is electrically connected to the main engine 22 through a control line.

In order to connect reliably, as shown in Figure 9, the installation sleeve 23 is provided with a limit groove 26 facing the elbow 3, the part of the buckle 24 is set in the limit groove 26, and there is a gap between the buckle 24 and the installation sleeve 23. The second return spring 27 , the movement direction of the second return spring 27 is towards the elbow 3 . The limit slot 26 is used to limit the movement of the buckle 24 to prevent the buckle 24 from coming out or stretching out too long. The second return spring 27 is used to keep the movement trend of the buckle 24 towards the elbow 3 to ensure reliable connection of the buckle 24 sex.

In order to connect reliably, the installation sleeve 23 is provided with a deflector 28 , and the elbow 3 is arranged between the installation sleeve 23 and the deflector 28 . The deflector 28 is used to guide the air outlet, and can also strengthen the strength of the installation sleeve 23, and at the same time clamp the elbow 3 in the middle to ensure the connection reliability of the elbow 3 and prevent the elbow 3 from moving.

In order to connect reliably, buckles 24 are arranged at the upper and lower ends of the installation sleeve 23 . The upper and lower ends of the buckle 24 are arranged so that the connection between the elbow 3 and the installation sleeve 23 is more reliable.

In order to facilitate the installation of the elbow 3 , as shown in FIG. 13 , a second guide groove 29 is provided on both sides of the installation sleeve 23 , and a second guide platform 30 matching the second guide groove 29 is provided on the elbow 3 . The cooperation of the second guide groove 29 and the second guide table 30 can play the role of guidance and anti-rotation, ensuring reliable entry of the elbow 3 and more convenient insertion.

In order to improve safety, as shown in Figure 7, the installation sleeve 23 is provided with a safety switch 31, the safety switch 31 is arranged towards the entry direction of the elbow 3, and a pressing member 32 is arranged between the safety switch 31 and the elbow 3, A third return spring 33 is arranged between the pressing member 32 and the installation sleeve 23, and the movement direction of the third return spring 33 is towards the departure direction of the elbow 3. When the elbow 3 completely enters the installation sleeve 23, the safety switch 31 is in contact with the pressing piece 32 and is triggered. The safety switch 31 is used to control the start of the whole machine, prevent the machine from accidentally starting when the elbow 3 is not installed in place, and improve the safety of use. The pressing member 32 is used to trigger the safety switch 31, and the third return spring 33 is used to For the reset of the pressing part 32, after the elbow 3 exits, the pressing part 32 can automatically reset and disconnect the trigger of the safety switch 31. When in use, the elbow 3 will push the pressing part 32 to move after entering the installation sleeve 23, so that the pressing The part 32 contacts with the safety switch 31, and triggers the safety switch 31, so that the machine can run normally.

In this embodiment, the safety switch 31 is a micro switch.

In order to reduce the transport volume, as shown in Figure 16, the straight pipe 5 includes a first air pipe 38, a second air pipe 39 and a detachable and replaceable air pipe head 40, the air pipe head 40 is sleeved on the second air pipe 39, the second air pipe 39 is sleeved on the first air pipe 38, and the end of the first air pipe 38 facing the second air pipe 39 is provided with at least two upward first protrusions 41, and the adjacent two second air pipes A third locking slot 42 is formed between one of the protrusions 41 . The second air duct 39 is provided with a first positioning device 43 capable of self-resetting toward the first air duct 38 . The first positioning device 43 cooperates with the third locking slot 42 . The first air pipe 38, the second air pipe 39 and the air pipe head 40 are nested with each other, and the detachable design is convenient for packaging and transportation, reducing the occupied space. The pipe head 40 improves the applicability, and a plurality of third slots 42 are formed between the first protrusions 41 to realize the design of multiple fixed positions, and then cooperate with the third slots 42 through the first positioning device 43, Realize that the second air duct 39 adjusts the installation position on the first air duct 38 according to the fixed position, that is, realizes the expansion and contraction of the second air duct 39 on the first air duct 38, adjusts the extension length of the second air duct 39, User-friendly. In this embodiment, there are three first bumps 41 .

In order for the second air pipe 39 to move reliably, the second air pipe 39 is provided with a third guide groove 44 , and the first air pipe 38 is provided with a third guide platform 45 matching with the third guide groove 44 . The third guide groove 44 cooperates with the third guide platform 45 to guide the movement of the second air duct 39 and prevent the second air duct 39 from freely rotating.

In order to improve the strength of the joint, a fixing ring 46 is provided between the first air duct 38 and the second air duct 39 , and the fixing ring 46 is passed through the second air duct 39 . The design of the fixing ring 46 can improve the connection strength between the first air duct 38 and the second air duct 39 .

For the reliable installation of the air duct head 40, as shown in Figure 17, the second air duct 39 is provided with a second protrusion 47 and a second retaining ring 48 at one end of the air duct head 40, and the second protrusion 47 is arranged at the second end. Between the second retaining ring 48 and the end of the second air duct 39, a fourth locking groove 49 is formed between the second protrusion 47 and the second retaining ring 48, and the air duct head 40 is provided with a The second positioning device 50 is self-resetting, and the second positioning device 50 cooperates with the fourth locking groove 49 . The second retaining ring 48 is used to block the air duct head 40 , and the fourth locking groove 49 cooperates with the second positioning device 50 to realize that the air duct head 40 is fixed on the second air duct 39 and is easy to disassemble.

The above are only preferred embodiments of the present utility model, and do not limit the utility model in any form. Although the utility model has been disclosed as above with preferred embodiments, it is not used to limit the utility model. Any Those skilled in the art, without departing from the scope of the technical solution of the present utility model, may use the technical content disclosed above to make some changes or modify equivalent embodiments with equivalent changes, but all without departing from the technical solution of the utility model According to the technical essence of the utility model, any brief modification, equivalent change and modification made to the above embodiments still belong to the scope of the technical solution of the utility model.

Claims (10)

1. The utility model provides a knapsack hair-dryer, includes knapsack subassembly (1) and wind pipe assembly (2), its characterized in that tuber pipe subassembly (2) include return bend (3), hose (4) and straight tube (5) in proper order, hose (4) both ends are connected with return bend (3) and straight tube (5) respectively, the return bend (3) other end is connected with knapsack subassembly (1), be equipped with handle (6) on straight tube (5), be equipped with staple bolt (7) between handle (6) and straight tube (5), staple bolt (7) cover is established on straight tube (5), staple bolt (7) and straight tube (5) can relative movement, staple bolt (7) upper end is connected with handle (6), straight tube (5) bottom is equipped with first guide table (8), staple bolt (7) lower extreme is equipped with first guide way (9) with first guide table (8) complex.

2. A backpack blower according to claim 1, wherein: the locking piece (10) is arranged on the hoop (7), the locking piece (10) is rotationally connected with the hoop (7) through a rotating shaft (11), the locking piece (10) comprises a locking end (12) close to the rotating shaft (11) and a handle end (13) far away from the rotating shaft (11), the maximum distance from the rotating shaft (11) to the locking end (12) is larger than the minimum distance from the rotating shaft (11) to the first guide table (8) or the straight pipe (5), and the minimum distance from the rotating shaft (11) to the locking end (12) is smaller than the minimum distance from the rotating shaft (11) to the first guide table (8) or the straight pipe (5); smooth transition is formed between the maximum distance end from the rotating shaft (11) to the locking end (12) and the minimum distance end from the rotating shaft (11) to the locking end (12); the lower part of the anchor ear (7) is provided with a groove (14), and the locking piece (10) is arranged in the groove (14); when the locking piece (10) is in a locking state, an abutting surface (15) is arranged between the locking piece (10) and the anchor ear (7).

3. A backpack blower according to claim 1, wherein: the handle (6) is rotationally connected with the anchor ear (7), a locking button (16) capable of being pressed is arranged on the handle (6), one end of the locking button (16) extends out of the anchor ear (7), the other end of the locking button is arranged in the handle (6), clamping teeth (17) are arranged on the locking button (16), the clamping teeth (17) are uniformly distributed around the rotation center of the handle (6), a first clamping groove (18 a) and a second clamping groove (18 b) are respectively arranged on the handle (6) and the anchor ear (7), the first clamping groove (18 a) and the second clamping groove (18 b) are matched with the clamping teeth (17), and the projection of the first clamping groove (18 a) on a vertical plane is identical with the projection of the second clamping groove (18 b) on a vertical plane; a first reset spring (19) is arranged between the locking button (16) and the inner wall of the handle (6), and the arrangement direction of the first reset spring (19) is the same as the pressing direction of the locking button (16).

4. A backpack blower according to claim 1, wherein: the straight pipe (5) is provided with an upper baffle ring (20) and a lower baffle ring (21), the first guide table (8) is arranged between the upper baffle ring (20) and the lower baffle ring (21), the outer diameters of the upper baffle ring (20) and the lower baffle ring (21) are both larger than the inner diameter of the anchor ear (7), and the anchor ear (7) is designed in a split mode.

5. A backpack blower according to claim 1, wherein: the backpack assembly (1) comprises a host machine (22), wherein an installation sleeve (23) matched with the elbow pipe (3) is arranged on the host machine (22), one end of the elbow pipe (3) is arranged on the installation sleeve (23) in a penetrating mode, a buckle (24) facing the elbow pipe (3) is arranged on the installation sleeve (23), and a buckle groove (25) matched with the buckle (24) is formed in the elbow pipe (3); the mounting sleeve (23) is provided with a limit groove (26) facing the elbow (3), a part of the buckle (24) is arranged in the limit groove (26), a second reset spring (27) is arranged between the buckle (24) and the mounting sleeve (23), and the movement direction of the second reset spring (27) faces the elbow (3).

6. A backpack blower according to claim 5, wherein: a guide piece (28) is arranged in the mounting sleeve (23), and the bent pipe (3) is arranged between the mounting sleeve (23) and the guide piece (28); the buckles (24) are arranged at the upper end and the lower end of the mounting sleeve (23); second guide grooves (29) are formed in two sides of the mounting sleeve (23), and a second guide table (30) matched with the second guide grooves (29) is arranged on the bent pipe (3).

7. A backpack blower according to claim 6, wherein: be equipped with safety switch (31) on installation cover (23), safety switch (31) set up towards the direction of entry of return bend (3), be equipped with between safety switch (31) and return bend (3) and press piece (32), be equipped with third reset spring (33) between press piece (32) and installation cover (23), the direction of movement of third reset spring (33) is towards the leaving direction of return bend (3), under the state that return bend (3) completely entered into installation cover (23), safety switch (31) and press piece (32) contact and trigger.

8. A backpack blower according to any one of claims 1-7, wherein: the straight pipe (5) comprises a first air pipe (38), a second air pipe (39) and a detachable and replaceable air pipe head (40), the air pipe head (40) is sleeved on the second air pipe (39), the second air pipe (39) is sleeved on the first air pipe (38), at least two upward first protruding blocks (41) are arranged at one end, facing the second air pipe (39), of the first air pipe (38), a third clamping groove (42) is formed between every two adjacent first protruding blocks (41), a first positioning device (43) capable of self-resetting towards the first air pipe (38) is arranged on the second air pipe (39), and the first positioning device (43) is matched with the third clamping groove (42).

9. A backpack blower according to claim 8 wherein: a third guide groove (44) is formed in the second air pipe (39), and a third guide table (45) matched with the third guide groove (44) is arranged on the first air pipe (38); a fixing ring (46) is arranged between the first air pipe (38) and the second air pipe (39), and the fixing ring (46) is arranged on the second air pipe (39) in a penetrating mode.

10. A backpack blower according to claim 8 wherein: one end of the second air pipe (39) facing the air pipe head (40) is provided with a second lug (47) and a second baffle ring (48), the second lug (47) is arranged between the second baffle ring (48) and the end part of the second air pipe (39), a fourth clamping groove (49) is formed between the second lug (47) and the second baffle ring (48), the air pipe head (40) is provided with a second positioning device (50) capable of self-resetting towards the second air pipe (39), and the second positioning device (50) is matched with the fourth clamping groove (49).