Portable dust collection device

Abstract

The invention provides a portable dust collection device, and relates to the technical field of dust collectors, the portable dust collection device comprises a back shell, a dust collection mechanism is installed in the back shell, a moving mechanism is installed at the front end of the back shell, the moving mechanism is fixedly connected with a strap, a burden reducing mechanism is installed at the lower end of the back shell, the strap can carry the back shell on the back of a user, and when the working ground is flat, the back shell can be fixed to the back of the user. The moving mechanism can drag the back shell to move, the back shell does not need to be carried on the back, the adaptability of the portable dust collection device is improved, the dust collection mechanism can complete dust collection work, the burden reducing mechanism can reduce the burden of a user when the back shell is carried on the back of the user, and the problem that if the cleaning time is long, the cleaning efficiency is high is solved. And the backpack type dust collector is carried on the body for a long time, so that burden is caused to a user.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum cleaners, in particular to a portable vacuum cleaner. Background Art

[0002] Existing vacuum cleaners are still of conventional design, consisting of a power cord, a handle, and a vacuum tube body. They are extremely inconvenient to operate on site, inconvenient to carry, and limited by power supply. Backpack vacuum cleaners can carry the main unit of the vacuum cleaner on the body like a backpack, allowing users to free their hands to work. They are suitable for places with small spaces and many ground obstacles, such as cinemas.

[0003] However, if the cleaning time is long, carrying the backpack vacuum cleaner for a long time will cause a burden to the user. Summary of the invention

[0004] The present invention provides a portable vacuum cleaner to solve the above-mentioned technical problem that if the cleaning time is long, the backpack vacuum cleaner will cause a burden to the user if carried on the body for a long time.

[0005] To solve the above technical problems, the present invention discloses a portable dust suction device, including a back shell, a dust suction mechanism installed inside the back shell, a moving mechanism installed at the front end of the back shell, the moving mechanism is fixedly connected to the shoulder strap, and a load-reducing mechanism is installed at the lower end of the back shell.

[0006] Preferably, the moving mechanism includes a support 1 symmetrically arranged on the left and right sides of the front end of the back shell, the support 1 is rotatably connected to the rotating block 1 through a rotating shaft 1, a limit block is provided at the end of the rotating shaft 1 away from the support 1, and a limit groove is provided on the limit block, the rotating block 1 is rotatably connected to the rotating block 2 through a rotating shaft 2, the rotating block 2 is slidably connected to the cylindrical section of the threaded rod, the threaded section of the threaded rod is threadedly connected to the rotating sleeve, the rotating sleeve is rotatably arranged on the left and right ends of the upper side of the back block, and open grooves are symmetrically arranged on the left and right ends of the upper side of the back block, the connecting point between the threaded rod and the rotating block 2 is correspondingly arranged in the open groove, and the open groove and the support 1 are correspondingly arranged.

[0007] Preferably, the opening groove is arranged at the rear end of the back block, and the front end of the back block is fixedly connected to the shoulder strap.

[0008] Preferably, limit grooves are symmetrically provided on the front and rear sides of one end of the rotating sleeve away from the opening groove, the limit grooves cooperate with the limit blocks, the limit blocks are symmetrically arranged at the front and rear ends of the limit plate, the front and rear ends of the limit plate are symmetrically provided with spring rods, the spring rods are symmetrically arranged on the left and right sides of the front and rear ends of the back block, and an opening is provided in the middle of the limit plate for the threaded rod to pass through.

[0009] Preferably, the dust suction mechanism includes a working chamber and a dust suction chamber arranged inside the back shell, the working chamber and the dust suction chamber are distributed up and down, and a baffle is fixedly arranged between the working chamber and the dust suction chamber, the fixing groove at the left end of the baffle is connected to the right part of the filter plate, the left end of the back shell is provided with an opening for the left part of the filter plate to pass through, the upper end of the filter plate is provided with a card slot, the card slot cooperates with a card block, the card block is slidably connected to the left end of the back shell, a spring is fixedly arranged between the card block and the fixed block, and the fixed block is fixedly arranged at the left end of the back shell.

[0010] Preferably, a dust suction pipe is provided at the left end of the back shell, and the dust suction pipe is connected with the dust suction chamber, and one end of the dust suction pipe away from the dust suction chamber is connected with the dust suction head, the dust suction pipe is fixedly connected to the horizontal end of the operating block, the vertical end of the operating block cooperates with the groove at the lower end of the back shell, the vertical end of the operating block is provided with a fixing hole 1, and the left and right sides of the groove are symmetrically connected with fixing holes 2, both fixing holes 1 and 2 are correspondingly matched with fixing block 2, fixing block 2 is fixedly connected to the connecting block, a spring 2 is fixedly provided between the connecting block and the left end of the back shell, and the spring 2 is sleeved on the fixing block 2.

[0011] Preferably, a motor and a battery are fixedly provided at the upper end of the working chamber, the motor and the battery are electrically connected, and the motor is fixedly connected to the exhaust fan via a motor shaft.

[0012] Preferably, the load-reducing mechanism includes an air supply pipe arranged at the right end of the back shell, the air supply pipe is connected to the working chamber, one end of the air supply pipe away from the working chamber is connected to the fixed shell, a sealed chamber is arranged inside the fixed shell, the sealed chamber is connected to the air supply pipe, a sliding plate is slidably arranged in the sealed chamber, the sliding plate is fixedly connected to a connecting rod, the connecting rod passes through the lower end of the sealed chamber and is fixedly connected to the fixed plate, a universal wheel is respectively installed at the top corner of the lower end of the fixed plate, and a plurality of springs are fixedly arranged between the sliding plate and the lower end of the sealed chamber.

[0013] Preferably, a pressure relief mechanism is installed on the side wall of the working chamber, and the pressure relief mechanism includes a connecting shell, which is fixedly arranged at the right end of the working chamber, and pressure relief ports are penetrated at the left and right ends of the connecting shell, and the pressure relief port is connected with the working chamber. A rotating shaft three is rotatably arranged at the lower end of the pressure relief port, and the rotating shaft three is fixedly connected to the blocking plate, and the blocking plate is correspondingly arranged in the pressure relief port. The rear end of the rotating shaft three is fixedly connected to the torsion spring, and the torsion spring is fixedly connected to the connecting shaft, and the connecting shaft is rotatably connected to the rotating hole. The torsion spring is arranged in the rotating hole, and the rotating hole is connected with the pressure relief port. The rotating hole is fixedly arranged at the rear end of the connecting shell, the connecting shaft is fixedly connected to gear one, gear one is meshed with gear two, gear two is rotatably connected to the rear end of the connecting shell, gear two is meshed with a rack, the rack penetrates the baffle and is fixedly connected to the dust accumulation plate, the dust accumulation plate is slidably arranged in the dust suction chamber, and a number of springs four are fixedly arranged between the dust accumulation plate and the dust suction chamber.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] A load-reducing mechanism is installed at the lower end of the back shell, and the shoulder strap can carry the back shell on the user's back. When the working ground is flat, the moving mechanism can drag the back shell to move, and there is no need to carry the back shell on the back, which improves the adaptability of the portable dust suction device of the present invention. The dust suction mechanism can complete the dust suction work, and the load-reducing mechanism can reduce the burden of the user when the back shell is carried on the user's back.

[0016] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the top view structure of the present invention;

[0019] Figure 2 It is a side view structural schematic diagram of the present invention;

[0020] Figure 3 for Figure 1 A schematic diagram of the enlarged structure of region A;

[0021] Figure 4 for Figure 2 A schematic diagram of the enlarged structure of the B region;

[0022] Figure 5 for Figure 2 Schematic diagram of the enlarged structure of the C region;

[0023] Figure 6 Schematic diagram of the structure of the connection shell.

[0024] In the figure: 1, back shell; 2, working chamber; 3, dust suction pipe; 4, torsion spring; 5, support one; 6, limit slot; 7, rotating shaft two; 8, rotating block one; 9, back block; 10, shoulder strap; 11, opening slot; 12, rotating sleeve; 13, rotating block two; 14, threaded rod; 15, limit plate; 16, spring rod; 17, limit block; 18, limit slot; 19, rotating shaft one; 20, dust suction chamber; 21, dust accumulation plate; 22, spring four; 23, baffle; 24, filter plate; 25, block; 26, spring one; 27, fixed block one; 28, exhaust fan ; 29. ​​Battery; 30. Motor; 31. Motor shaft; 32. Rotating hole; 33. Operating block; 34. Cleaning head; 35. Connecting shaft; 36. Pressure relief port; 37. Air supply pipe; 38. Fixed shell; 39. Sealed chamber; 40. Sliding plate; 41. Connecting rod; 42. Fixed plate; 43. Universal wheel; 44. Spring three; 45. Rack; 46. Connecting block; 47. Spring two; 48. Fixed block two; 49. Fixed hole one; 50. Groove; 51. Rotating shaft three; 52. Gear two; 53. Gear one; 54. Blocking plate; 55. Connecting shell. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0026] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] The present invention provides the following embodiments

[0028] Example 1

[0029] The embodiment of the present invention provides a portable dust collection device, such as Figure 1-Figure 2 As shown, it includes a back shell 1, a dust suction mechanism is installed inside the back shell 1, a moving mechanism is installed at the front end of the back shell 1, the moving mechanism is fixedly connected to the shoulder strap 10, and a load-reducing mechanism is installed at the lower end of the back shell 1.

[0030] The beneficial effects of the above technical solution are:

[0031] The shoulder strap 10 can carry the back shell 1 on the user's back. When the working ground is flat, the moving mechanism can drag the back shell 1 to move, and there is no need to carry the back shell 1 on the back, which improves the adaptability of the portable vacuum cleaner of the present invention. The vacuuming mechanism can complete the vacuuming work, and the load-reducing mechanism can reduce the burden of the user when the back shell 1 is carried on the user's back, solving the above-mentioned technical problem that if the cleaning time is long, the backpack vacuum cleaner will cause a burden to the user if carried on the body for a long time.

[0032] Example 2

[0033] On the basis of Example 1, Figure 1-Figure 3 As shown, the moving mechanism includes a support 5 symmetrically arranged on the left and right sides of the front end of the back shell 1, the support 5 is arranged on the upper side of the back shell 1, the support 5 is rotatably connected with the rotating block 8 through a rotating shaft 19, a limit block is arranged at the end of the rotating shaft 19 away from the support 5, and a limit groove 6 is arranged on the limit block, the rotating block 8 is rotatably connected with the rotating block 2 13 through a rotating shaft 2 7, the rotating block 2 13 is slidably connected with the cylindrical section of the threaded rod 14, the threaded section of the threaded rod 14 is threadedly connected with the rotating sleeve 12, the rotating sleeve 12 is rotatably arranged at the left and right ends of the upper side of the back block 9, the left and right ends of the upper side of the back block 9 are symmetrically provided with open grooves 11, the connecting part between the threaded rod 14 and the rotating block 2 13 is correspondingly arranged in the open groove 11, and the open groove 11 is correspondingly arranged with the support 5;

[0034] The opening slot 11 is provided at the rear end of the back block 9, and the front end of the back block 9 is fixedly connected to the shoulder strap 10;

[0035] The rotating sleeve 12 has limit grooves 18 symmetrically arranged on the front and rear sides of one end away from the opening groove 11, and the limit grooves 18 cooperate with the limit blocks 17. The limit blocks 17 are symmetrically arranged on the front and rear ends of the limit plate 15. The front and rear ends of the limit plate 15 are symmetrically provided with spring rods 16. The spring rods 16 are symmetrically arranged on the left and right sides of the front and rear ends of the back block 9. The middle part of the limit plate 15 is provided with an opening for the threaded rod 14 to pass through.

[0036] The beneficial effects of the above technical solution are:

[0037] When the back shell 1 is carried on the user's back, the rotating block 2 13 and the rotating block 1 8 are folded up to keep them both in a vertical state, and then the opening groove 11 is set corresponding to the support 1 5. At this time, the limit plate 15 is pressed to move, so that the limit plate 15 drives the limit block 17 to contact the limit groove 18. At this time, the spring rod 16 is compressed, and the rotating sleeve 12 cannot rotate freely. At this time, when the threaded rod 14 is rotated, the threaded rod 14 can move along the rotating block 2 13, so that the cylindrical section of the threaded rod 14 enters the limit groove 6. The opening groove 11 and the support 5 cannot be separated. At this time, the rotating block 2 13 and the rotating block 1 8 have completed folding, and then the back shell 1 can be carried by the shoulder strap 10. If the back shell 1 is moved by the moving mechanism, the threaded rod 14 is rotated in the opposite direction to disengage the cylindrical section of the threaded rod 14 from the limiting groove 6, and then the rotating block 2 13 and the rotating block 1 8 are rotated to unfold the rotating block 2 13 and the rotating block 1 8. The user can pull the back shell 1 to move by pulling the shoulder strap 10 on the back block 9.

[0038] Example 3

[0039] On the basis of Example 1, Figure 1-Figure 6 As shown, the dust collection mechanism includes a working chamber 2 and a dust collection chamber 20 arranged inside the back shell 1, the working chamber 2 and the dust collection chamber 20 are distributed up and down, and a baffle 23 is fixedly arranged between the working chamber 2 and the dust collection chamber 20, the fixing groove at the left end of the baffle 23 is connected to the right part of the filter plate 24, the left end of the back shell 1 is provided with an opening for the left part of the filter plate 24 to pass through, the upper end of the filter plate 24 is provided with a card slot, the card slot cooperates with a card block 25, the card block 25 is slidably connected to the left end of the back shell 1, a spring 26 is fixedly arranged between the card block 25 and a fixed block 27, and the fixed block 27 is fixedly arranged at the left end of the back shell 1;

[0040] A dust suction pipe 3 is provided at the left end of the back shell 1, and the dust suction pipe 3 is communicated with the dust suction chamber 20, and one end of the dust suction pipe 3 away from the dust suction chamber 20 is communicated with the dust suction head 34, and the dust suction pipe 3 is fixedly connected to the horizontal end of the operating block 33, and the vertical end of the operating block 33 cooperates with the groove 50 at the lower end of the back shell 1, and the vertical end of the operating block 33 is provided with a fixing hole 1 49, and the left and right sides of the groove 50 are symmetrically connected with fixing holes 2, and the fixing holes 1 49 and the fixing holes 2 are both correspondingly matched with the fixing block 2 48, and the fixing block 2 48 is fixedly connected with the connecting block 46, and a spring 2 47 is fixedly provided between the connecting block 46 and the left end of the back shell 1, and the spring 2 47 is sleeved on the fixing block 2 48;

[0041] A motor 30 and a battery 29 are fixedly provided at the upper end of the working chamber 2 . The motor 30 and the battery 29 are electrically connected. The motor 30 is fixedly connected to the exhaust fan 28 via a motor shaft 31 .

[0042] The beneficial effects of the above technical solution are:

[0043] When the dust collection mechanism is working, the motor 30 is controlled to work, and the motor 30 drives the exhaust fan 28 to rotate through the motor shaft 31. When the exhaust fan 28 rotates, the outside air enters the working chamber 2 and the dust collection chamber 20, so that the dust collection pipe 3 can absorb air, and the dust in the dust collection area enters the dust collection chamber 20 through the dust collection head 34 and the dust collection pipe 3. The setting of the filter plate 24 prevents dust from entering the working chamber 2, thereby preventing dust from entering the working chamber 2 and affecting the normal operation of the motor 30;

[0044] The setting of the operating block 33 can be used as a handle to drive the dust suction pipe 3 to move. When driving the operating block 33 to move, the connecting block 46 is pulled, and the connecting block 46 drives the fixing block 2 48 to disengage from the fixing hole 1 49 and the fixing hole 2, and the spring 2 47 is stretched. At this time, the operating block 33 is pulled out of the groove 50, so that the operating block 33 can freely drive the dust suction pipe 3 to move. After the operating block 33 is matched with the groove 50 again, the fixing block 28 is matched with the fixing hole 1 49 and the fixing hole 2 again under the elastic action of the spring 2 47. When removing the filter plate 24, the clamping block 25 is pulled so that the clamping block 25 is disengaged from the clamping slot, and the spring 1 26 is compressed. At this time, the filter plate 24 is pulled out from the opening, which is convenient for cleaning the filter plate 24. After the filter plate 24 is reinserted into the fixing slot at the left end of the baffle 23, the clamping block 25 is matched with the clamping slot again under the elastic action of the spring 1 26, and the filter plate 24 is connected.

[0045] Example 4

[0046] On the basis of Example 3, Figure 1-Figure 6 As shown, the load-reducing mechanism includes an air supply pipe 37 arranged at the right end of the back shell 1, the air supply pipe 37 is communicated with the working chamber 2, and one end of the air supply pipe 37 away from the working chamber 2 is connected to the fixed shell 38, and a sealed chamber 39 is arranged inside the fixed shell 38, and the sealed chamber 39 is communicated with the air supply pipe 37, and a sliding plate 40 is slidably arranged in the sealed chamber 39, and the sliding plate 40 is fixedly connected with a connecting rod 41, and the connecting rod 41 passes through the lower end of the sealed chamber 39 and is fixedly connected with a fixed plate 42, and a universal wheel 43 is respectively installed at the top corner of the lower end of the fixed plate 42, and a plurality of springs 44 are fixedly arranged between the sliding plate 40 and the lower end of the sealed chamber 39;

[0047] The side wall of the working chamber 2 is provided with a pressure relief mechanism, which includes a connecting shell 55, which is fixedly arranged at the right end of the working chamber 2, and the left and right ends of the connecting shell 55 are penetrated with a pressure relief port 36, which is communicated with the working chamber 2, and the lower end of the pressure relief port 36 is rotatably provided with a rotating shaft 3 51, which is fixedly connected to a plugging plate 54, and the plugging plate 54 is correspondingly arranged in the pressure relief port 36, and the rear end of the rotating shaft 3 51 is fixedly connected to a torsion spring 4, and the torsion spring 4 is fixedly connected to the connecting shaft 35, and the connecting shaft 35 is rotatable with the rotating hole 32. The torsion spring 4 is arranged in the rotating hole 32, the rotating hole 32 is communicated with the pressure relief port 36, the rotating hole 32 is fixedly arranged at the rear end of the connecting shell 55, the connecting shaft 35 is fixedly connected with the gear 1 53, the gear 1 53 is meshed with the gear 2 52, the gear 2 52 is rotatably connected with the rear end of the connecting shell 55, the gear 2 52 is meshed with the rack 45, the rack 45 passes through the baffle 23 and is fixedly connected with the dust accumulation plate 21, the dust accumulation plate 21 is slidably arranged in the dust collection chamber 20, and a plurality of springs 4 22 are fixedly arranged between the dust collection plate 21 and the dust collection chamber 20.

[0048] The beneficial effects of the above technical solution are:

[0049] A universal wheel 43 is provided at the lower end of the fixed plate 42. When the back shell 1 is placed on the ground, the setting of the universal wheel 43 facilitates the movement of the back shell 1. When the motor 30 is working, air flows through the dust suction head 34, the dust suction pipe 3, the dust suction chamber 20, the working chamber 2 and the air supply pipe 37 in sequence. When the air flows into the sealed chamber 39 through the air supply pipe 37, the sliding plate 40 is pushed to slide along the sealed chamber 39. The sliding plate 40 drives the connecting rod 41 to move, and the connecting rod 41 drives the fixed plate 42 to move downward. The fixed plate 42 drives the universal wheel 43 to move downward and support the ground. The spring three 44 is compressed to support the ground. After the pressure in the sealed chamber 39 increases, the back shell 1 can be pushed to move upward, reducing the force between the shoulder strap 10 and the user, thereby achieving the purpose of reducing the burden on the user.

[0050] The pressure relief mechanism is set up. When the air pressure in the sealing chamber 39 is large enough, the gas in the working chamber 2 should be relieved to avoid excessive air pressure affecting the normal dust collection steps. When no dust enters the back shell 1 and it is in an empty warehouse state, and the air pressure in the working chamber 2 reaches a certain value, the blocking plate 54 is pushed to rotate, and the blocking plate 54 drives the rotating shaft 3 51 to rotate, and the rotating shaft 3 51 drives the torsion spring 4 to deform. At this time, the blocking plate 54 no longer blocks the pressure relief port 36, and the pressure relief work in the working chamber 2 is completed. If too much dust accumulates in the back shell 1 and the weight increases, the dust accumulation plate 21 slides downward along the dust collection chamber 20, and the spring 4 22 is compressed. When the dust accumulation plate 21 moves downward, The movable rack 45 moves downward, the rack 45 drives the gear 2 52 to rotate, the gear 2 52 drives the gear 1 53 to rotate, the gear 1 53 drives the connecting shaft 35 to rotate, the connecting shaft 35 drives the torsion spring 4 to deform, the torsion spring 4 drives the rotating shaft 3 51 to rotate forward, the rotating shaft 3 51 drives the blocking plate 54 to rotate forward, because the height of the blocking plate 54 is slightly greater than the height of the pressure relief port 36, the blocking plate 54 can only rotate backward, so the torsion spring 4 cannot drive the blocking plate 54 to rotate forward when it is deformed, and the gas in the working chamber 2 needs a greater force to push the blocking plate 54 to rotate backward, firstly, the air pressure in the sealing chamber 39 is made greater, which reduces the interaction between the shoulder strap 10 and the user. The force between the shoulder strap 10 and the user remains constant when the dust in the back shell 1 gradually increases, thereby reducing the burden on the user and preventing the gas in the working chamber 2 from pushing the blocking plate 54 to rotate backward. The user feels relaxed at the beginning, and as the dust collection work proceeds, the burden on the user gradually increases. The force between the shoulder strap 10 and the user remains constant, which makes it convenient for the user to adapt to the force, thereby reducing the burden on the user and improving the comfort of the user. The air pressure value of the working chamber 2 is set to a target value, the length of the rack 45 is set to a target length, and the maximum pressure required for the gas in the working chamber 2 to push the blocking plate 54 to rotate backward is set to a target value. When the force is equal to the maximum allowable air pressure of the working chamber 2, the rack 45 just disengages from the gear 2 52, so that the maximum pressure required for the gas in the working chamber 2 to push the blocking plate 54 to rotate backward should always be less than the maximum allowable air pressure of the working chamber 2 to avoid affecting the normal dust collection steps. At this time, if the user feels that the force applied by the shoulder strap 10 increases, it means that the air pressure in the sealing chamber 39 has reached the maximum value, the load-reducing mechanism can no longer continue to reduce the load, and there is enough dust in the back shell 1. At this time, the dust in the back shell 1 should be cleared, and a dust cleaning port can be set at the rear end of the back shell 1 corresponding to the dust collection chamber 20 to facilitate the removal of dust in the dust collection chamber 20.

[0051] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A portable vacuum cleaner, characterized in that: It comprises a back shell (1), a dust collecting mechanism is installed inside the back shell (1), a moving mechanism is installed at the front end of the back shell (1), the moving mechanism is fixedly connected to the shoulder strap (10), and a load-reducing mechanism is installed at the lower end of the back shell (1).

2. A portable dust collecting device according to claim 1, characterized in that: The moving mechanism comprises a support (5) symmetrically arranged on the left and right sides of the front end of the back shell (1); the support (5) is rotatably connected to the rotating block (8) through a rotating shaft (19); a limit block is arranged at one end of the rotating shaft (19) away from the support (5); a limit groove (6) is arranged on the limit block; the rotating block (8) is rotatably connected to the rotating block (13) through a rotating shaft (7); the rotating block (13) is slidably connected to the cylindrical section of the threaded rod (14); the threaded section of the threaded rod (14) is threadedly connected to the rotating sleeve (12); the rotating sleeve (12) is rotatably arranged at the left and right ends of the upper side of the back block (9); the left and right ends of the upper side of the back block (9) are symmetrically provided with open grooves (11); the connecting point between the threaded rod (14) and the rotating block (13) is correspondingly arranged in the open groove (11); the open groove (11) and the support (5) are correspondingly arranged.

3. A portable dust collecting device according to claim 2, characterized in that: The opening groove (11) is arranged at the rear end of the back block (9), and the front end of the back block (9) is fixedly connected to the shoulder strap (10).

4. A portable dust collecting device according to claim 2, characterized in that: A stop groove (18) is symmetrically arranged at the front and rear sides of one end of the rotating sleeve (12) away from the opening groove (11), the stop groove (18) cooperates with the stop block (17), the stop block (17) is symmetrically arranged at the front and rear ends of the stop plate (15), the front and rear ends of the stop plate (15) are symmetrically arranged with spring rods (16), the spring rods (16) are symmetrically arranged at the front and rear ends and left and right sides of the back block (9), and an opening is arranged in the middle of the stop plate (15) for the threaded rod (14) to pass through.

5. The portable dust collecting device according to claim 1, characterized in that: The dust suction mechanism comprises a working chamber (2) and a dust suction chamber (20) arranged inside a back shell (1), the working chamber (2) and the dust suction chamber (20) being distributed up and down, and a baffle (23) being fixedly arranged between the working chamber (2) and the dust suction chamber (20), the fixing groove at the left end of the baffle (23) being connected to the right part of a filter plate (24), the left end of the back shell (1) being provided with an opening for the left part of the filter plate (24) to pass through, the upper end of the filter plate (24) being provided with a clamping groove, the clamping groove being matched with a clamping block (25), the clamping block (25) being slidably connected to the left end of the back shell (1), a spring (26) being fixedly arranged between the clamping block (25) and a fixing block (27), and the fixing block (27) being fixedly arranged at the left end of the back shell (1).

6. A portable dust collecting device according to claim 5, characterized in that: A dust suction pipe (3) is provided at the left end of the back shell (1), and the dust suction pipe (3) is communicated with the dust suction chamber (20). One end of the dust suction pipe (3) away from the dust suction chamber (20) is communicated with the dust suction head (34). The dust suction pipe (3) is fixedly connected to the horizontal end of the operating block (33). The vertical end of the operating block (33) cooperates with the groove (50) at the lower end of the back shell (1). A fixing hole 1 (49) is provided at the vertical end of the operating block (33). The groove (50) is symmetrically connected with a fixing hole 2 on both sides. The fixing hole 1 (49) and the fixing hole 2 are both correspondingly matched with a fixing block 2 (48). The fixing block 2 (48) is fixedly connected to the connecting block (46). A spring 2 (47) is fixedly provided between the connecting block (46) and the left end of the back shell (1), and the spring 2 (47) is sleeved on the fixing block 2 (48).

7. A portable dust collecting device according to claim 5, characterized in that: A motor (30) and a battery (29) are fixedly provided at the upper end of the working chamber (2); the motor (30) and the battery (29) are electrically connected; and the motor (30) is fixedly connected to the exhaust fan (28) via a motor shaft (31).

8. The portable dust collecting device according to claim 5, characterized in that: The load-reducing mechanism comprises an air supply pipe (37) arranged at the right end of the back shell (1), the air supply pipe (37) is connected to the working chamber (2), one end of the air supply pipe (37) away from the working chamber (2) is connected to the fixed shell (38), a sealing chamber (39) is arranged inside the fixed shell (38), the sealing chamber (39) is connected to the air supply pipe (37), a sliding plate (40) is slidably arranged in the sealing chamber (39), the sliding plate (40) is fixedly connected to a connecting rod (41), the connecting rod (41) passes through the lower end of the sealing chamber (39) and is fixedly connected to a fixed plate (42), a universal wheel (43) is respectively installed at the top corner of the lower end of the fixed plate (42), and a plurality of springs (44) are fixedly arranged between the sliding plate (40) and the lower end of the sealing chamber (39).

9. A portable dust collecting device according to claim 8, characterized in that: A pressure relief mechanism is installed on the side wall of the working chamber (2), and the pressure relief mechanism includes a connecting shell (55), the connecting shell (55) is fixedly arranged at the right end of the working chamber (2), and pressure relief ports (36) are penetrated at the left and right ends of the connecting shell (55), and the pressure relief ports (36) are communicated with the working chamber (2), and a rotating shaft (51) is rotatably arranged at the lower end of the pressure relief port (36), and the rotating shaft (51) is fixedly connected to a blocking plate (54), and the blocking plate (54) is correspondingly arranged in the pressure relief port (36), and the rear end of the rotating shaft (51) is fixedly connected to a torsion spring (4), and the torsion spring (4) is fixedly connected to the connecting shaft (35), and the connecting shaft (35) is rotatably connected to the rotating hole (32). The torsion spring (4) is arranged in the rotating hole (32), the rotating hole (32) is communicated with the pressure relief port (36), the rotating hole (32) is fixedly arranged at the rear end of the connecting shell (55), the connecting shaft (35) is fixedly connected to the gear one (53), the gear one (53) is meshed with the gear two (52), the gear two (52) is rotatably connected to the rear end of the connecting shell (55), the gear two (52) is meshed with the rack (45), the rack (45) penetrates the baffle (23) and is fixedly connected to the dust collecting plate (21), the dust collecting plate (21) is slidably arranged in the dust collecting chamber (20), and a plurality of springs four (22) are fixedly arranged between the dust collecting plate (21) and the dust collecting chamber (20).

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