Portable blower

Abstract

The present invention relates to a portable blower, the portable blower comprising: a body including a body case and formed with a grip portion; the airflow generating device is connected with the machine body shell, and the airflow generating device comprises a motor and a fan which is driven by the motor to rotate so as to generate airflow; the fan is contained in the volute, and the volute comprises an air inlet part and an air outlet which are in fluid communication; wherein the volute can rotate relative to the machine body, preferably at most 180 degrees, so that the angle of the air outlet can be adjusted.

Description

Technical Field

[0001] The invention relates to a portable blower, in particular to a portable blower capable of adjusting the angle of an air outlet. Background Art

[0002] Portable blowers are compact blowers designed specifically for small-scale cleaning tasks. Portable blowers are lightweight, easy to maneuver, and can provide concentrated airflow. Portable blowers are often battery-powered or rechargeable, making them convenient for mobile use.

[0003] Powered by a lithium battery, the blower acts as a cordless blower, making it an eco-friendly and effective tool for homeowners without cords. It is lightweight and portable, making it easy to use for a variety of outdoor cleaning tasks, such as blowing leaves or debris away from lawns and patios. In addition, the micro blower can also be used to clean keyboards and dust and debris generated during operations such as pottery on workbenches. Some micro blowers also have small brushes or other accessories to help with cleaning.

[0004] In the portable blowers of the prior art, the position of the air outlet is fixed, or the housing including the air outlet is fixed, which restricts the use of the blower for applications where the installation position is limited and the angle is difficult to adjust. In other designs, an air outlet angle adjustment mechanism or conversion device is provided separately, which makes the structure of the blower very complicated, increases the complexity of the operation for the operator, and increases the cost of the blower. In addition, since the blower is generally designed to be an elongated structure so that it can be operated over a longer range for blowing, the overly long structure will lead to inconvenience in storage and transportation, and the space occupied is also relatively large.

[0005] Therefore, there is still a need in the art for a portable blower having an air outlet whose angle can be easily adjusted and which saves space for storage and transportation. Summary of the invention

[0006] One of the purposes of the present application is to provide a portable blower whose air outlet angle can be easily adjusted, and whose volute can be rotated relative to the body, thereby saving storage and transportation space.

[0007] In order to solve the above technical problems, in one aspect of the present application, a portable blower is provided, the portable blower comprising:

[0008] A body, the body comprising a body shell and formed with a grip portion;

[0009] an airflow generating device, the airflow generating device being connected to the body shell, the airflow generating device comprising a motor and a fan driven by the motor to rotate to generate airflow; and

[0010] a volute housing the fan therein, the volute comprising an air inlet and an air outlet in fluid communication;

[0011] The volute can be rotated relative to the fuselage, preferably at most 180 degrees, so that the angle of the air outlet can be adjusted.

[0012] In an embodiment of one aspect of the present application, a seal is provided between the volute and the fuselage casing, and the seal damps rotation of the volute relative to the fuselage casing.

[0013] In an embodiment of one aspect of the present application, the air outlet extends outwardly tangentially relative to the volute, the fan is a centrifugal fan, and air enters the volute substantially axially through the air inlet portion.

[0014] In an embodiment of one aspect of the present application, the volute includes a left volute and a right volute, and the seal is provided between the left volute and the fuselage shell, and / or the seal is provided between the right volute and the fuselage shell.

[0015] In an embodiment of one aspect of the present application, a motor shaft of the motor passes through the left volute from the left side, and the fan is fixed to the motor shaft.

[0016] In an embodiment of one aspect of the present application, the left volute and the right volute are respectively provided with grooves and protrusions on the interface therebetween to prevent airflow from leaking from the interface when they are mounted together.

[0017] In an embodiment of one aspect of the present application, an air inlet cover is attached to the volute from a side opposite to the motor and corresponds to an air inlet portion of the volute, thereby facilitating air to enter the volute through the air inlet cover.

[0018] In an embodiment of one aspect of the present application, the air inlet cover is coupled to the volute through a coupling mechanism, and during rotation of the volute, the air inlet cover rotates together with the volute.

[0019] In an embodiment of one aspect of the present application, the sealing member is an O-ring seal disposed between the volute and the fuselage casing.

[0020] In an embodiment of one aspect of the present application, the portable blower includes a rechargeable battery disposed in the body housing, and the body housing accommodating the rechargeable battery is a handheld portion.

[0021] In an embodiment of one aspect of the present application, the portable blower further includes a blowing pipe connected to an air outlet of the volute to facilitate guiding airflow.

[0022] In an embodiment of one aspect of the present application, the volute is provided with a plurality of spaced-apart notches, and the housing is provided with a biasing mechanism to allow the volute to be fixed at a plurality of different angles relative to the housing.

[0023] In an embodiment of one aspect of the present application, the biasing mechanism includes a spring-biased pin, and the recess is configured to be rounded so that the pin can be disengaged from the recess when a user applies a force sufficient to overcome the spring biasing force.

[0024] In the embodiments of the present application, the portable blower of the present invention can easily adjust the angle of the air outlet, and the volute of the blower can be rotated relative to the body, thereby saving storage and transportation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Objects and features of the present invention will become apparent from the following detailed description considered in conjunction with the accompanying drawings. It should be understood, however, that the drawings are designed for illustration purposes only and are not intended to limit the present invention.

[0026] Figure 1 A perspective view of a portable blower according to an embodiment of the present invention is shown.

[0027] Figure 2 A partially exploded perspective view of a portable blower according to an embodiment of the present invention is shown, wherein a motor side of the portable blower is shown in an exploded perspective view.

[0028] Figure 3 A partially exploded perspective view of a portable blower according to an embodiment of the present invention is shown from another angle, wherein the air inlet side of a volute of the portable blower is shown in an exploded perspective view.

[0029] Figure 4 A front view of a portable blower according to an embodiment of the present invention is shown, wherein the upper figure shows the volute of the portable blower in a maximum extended state during operation, and the lower figure shows the volute in a folded state after a 180-degree rotation.

[0030] Figure 5 A portable blower according to an embodiment of the present invention is shown. Figure 4 A cross-sectional view taken along line AA, in which the motor, the volute and the fan are shown in a cutaway manner.

[0031] Figure 6 A perspective view of a volute and fan of a portable blower according to an embodiment of the present invention is shown.

[0032] Figure 7A perspective view schematically shows an example of a blowing pipe of a portable blower according to an embodiment of the present invention.

[0033] Figure 8 A partial perspective view of a portable blower according to a preferred embodiment of the present invention is schematically shown, wherein the housing is provided with a biasing mechanism to allow the volute to be fixed at a plurality of different angles relative to the housing. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in specific circumstances. In addition, in the description of the present invention, unless otherwise specified, the meaning of "multiple" is two or more. It is also necessary to understand that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] To facilitate those skilled in the art to understand the technical solution of the present invention, the technical solution of the present invention is further described with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals refer to the same or similar elements.

[0038] Figure 1 A perspective view of a portable blower 1000 according to an embodiment of the present invention is shown. The portable blower is used to perform various outdoor cleaning tasks, such as blowing leaves or debris away from lawns and gardens. Alternatively, the portable blower can also be used to perform indoor cleaning tasks, such as cleaning keyboards and dust and debris generated during operations such as pottery on a workbench.

[0039] like Figure 1 As shown, the blower 1000 includes a fuselage 1, a blowing pipe 10 and an airflow generating device 100. The fuselage 1 forms the main body of the blower 1000 and extends along the longitudinal direction L. Preferably, in the rear half of the fuselage 1, the fuselage is formed with a grip or a handle to facilitate the operator to hold it during work. In an embodiment of the present invention, the grip is formed by the fuselage shell itself. The airflow generating device 100 is used to generate an airflow, and the airflow generating device 100 is at least partially exposed to the outside of the fuselage 1, and air enters from the exposed part and is discharged through the air outlet 23 (see FIG. 2 ). Figure 3 ) to discharge the generated airflow. The blowing pipe 10 is attached to the airflow generating device 100, more specifically to the air outlet 23. The blowing pipe 10 is used to guide the airflow, thereby achieving the orientation of the airflow. Figure 1 The blowpipe 10 shown is an example of a cleaning accessory. The blowpipe may also be a flat blowpipe so that the blowpipe can be operated in a narrow space such as a slit. In another example, the blowpipe includes a small brush to facilitate sweeping or moving debris or dirt that may be located in a corner or hidden location, such as for cleaning a keyboard, etc. Figure 1 Also shown is a trigger switch 111 , which can turn on and off the blower 1000 , and can be provided with two or more adjustment gears, such as a low speed gear and a high speed gear, to adjust the wind speed of the blower 1000 .

[0040] Figure 2 A partially exploded perspective view of a portable blower 1000 according to an embodiment of the present invention is shown, wherein a motor side of the portable blower is shown in an exploded perspective view. Figure 3 A partially exploded perspective view of the portable blower 1000 according to the embodiment of the present invention is shown from another angle, wherein the air inlet side of the volute of the portable blower is shown in the exploded perspective view.

[0041] refer to Figure 1-3, the airflow generating device 100 at least includes a motor 7, a fan 24 connected to the motor 7, and a volute 2 surrounding the fan 24. In one embodiment, the motor 7 includes a motor body 70 and a motor shaft 71 extending from the motor body 70, and the fan 24 is fixedly connected to the motor shaft 71, so that the rotation of the motor shaft 71 drives the fan 24 to rotate to generate wind flow. In the present invention, the direction in which the motor shaft 71 extends is referred to as the axial direction. In one embodiment, the fan 24 is a centrifugal fan, which includes a wheel disc 241 and a guide blade 242 extending radially outward on one side of the wheel disc 241. When the centrifugal fan 24 is driven to rotate by the motor 7, the air filled between the blades 242 of the centrifugal fan 24 is pushed by the blades 242 and thrown to the outer edge of the blades 242 due to the centrifugal force. After the pressure energy and kinetic energy of the air increase, it flows out from the outer edge of the blades 242, and a negative pressure or a low-pressure area is formed in the middle of the blades 242, thereby sucking air into the fan, and the generated airflow is thrown toward the air outlet 23, generating a high-pressure area and generating a continuous airflow, so that the air is continuously sucked in and discharged from the outside, generating an axial suction force for air intake and a radial blowing force for blowing.

[0042] In one embodiment, the volute 2 includes a left volute 22 and a right volute 21. Of course, the volute 2 can also be formed as an integral structure. The volute 2 includes an air inlet corresponding to the air inlet cover 26 and an air outlet 23 extending tangentially outward, and the air inlet and the air outlet are fluidically connected. The air outlet 23 can be provided with the aforementioned blowing pipe 10 to facilitate guiding the airflow, thereby achieving a blowing or cleaning operation.

[0043] Continue to refer Figure 1-3 In one embodiment, the fuselage 1 includes a fuselage shell, for example including Figure 2-3 The left body shell 11 and the right body shell 12 are shown. In an embodiment of the present invention, a battery shell 120 is also included inside the body shell, and a rechargeable battery 110 is arranged inside the battery shell 120. A battery cover 4 is also provided at the rear of the body shell, and the battery cover 4 can be attached to the battery shell 120 to keep the rechargeable battery 110 fixed therein. In an embodiment of the present invention, the rechargeable battery 110 is, for example, a lithium battery, and preferably, the body is also provided with a charging interface to facilitate charging the rechargeable battery 110. The battery cover 4 can be removed from the body to facilitate the removal and replacement of the rechargeable battery 110. In a preferred embodiment, a battery power display device, such as an LED display screen, can be provided on the body, for example, to remind the operator that the battery needs to be replaced or charged when the battery is low.

[0044] Figure 2FIG. 1 shows an exploded perspective view of the left half of the portable blower 1000. Figure 2 As schematically shown, the airflow generating device 100 includes the motor 7 and a motor cover 3 fixed to the left fuselage shell 11, and the motor cover 3 preferably includes a plurality of openings or grilles to facilitate heat dissipation of the motor 7. In an embodiment not shown, the motor 7 may also be attached with an additional fan to help dissipate heat from the main body of the motor 7. In a preferred embodiment, Figure 2 The axial fixing portion 9 is also shown, and the axial fixing portion 9 is used to be fixed to the left fuselage shell 11, and the axial fixing portion 9 also includes a cylindrical portion 91 for inserting the motor shaft 71, such as Figure 5 As shown. Figure 2 Also shown are a motor body fixing auxiliary portion 6 and a support member 8, which are used to fix the motor 7 on the left fuselage shell 11 more firmly.

[0045] exist Figure 2 It is also shown in FIG. 1 that a seal 5 is provided between the left fuselage housing 11 and the volute 2. The seal 5 is, for example, an O-ring seal. The seal is used to seal the volute 2 during rotation relative to the fuselage 1, more specifically, during rotation of the left volute 22 of the volute 2 (see FIG. 1 ). Figure 3 ) During the rotation relative to the left fuselage shell 11, friction is generated between the volute 2 and the left fuselage shell 11, and after the volute 2 rotates to a certain position, the volute is maintained in the position by friction, that is, in the fixed rotational orientation and no longer rotates relative to the fuselage 1.

[0046] Figure 3 FIG. 1 shows an exploded perspective view of the right half of the portable blower 1000. Figure 3 Schematically shown, the airflow generating device 100 includes a fan 24 for connecting to the motor 7 and a volute 2 surrounding the fan 24. In a preferred embodiment, the volute 2 includes a left volute 22 and a right volute 21, which accommodate the fan 24 therein. A fixing ring 27 is also shown, which is used to fix the left volute 22 to the fuselage. The motor shaft 71 passes through the left volute 22 and the fixing ring 27 and is used to be fixedly connected to the fan 24. An air inlet cover 26 is also shown, which is fixed to the right fuselage shell 12, or fixed to the right volute 21. In a preferred embodiment, the air inlet cover 26 is fixed to the right volute 21, so that during the rotation of the volute 2, the air inlet cover 26 also rotates with the volute 2. In one embodiment, the air inlet cover 26 is a grid structure, thereby increasing the area that air can enter.

[0047] In a preferred embodiment of the present invention, a seal 25 is further provided between the right volute 21 and the right fuselage shell 12, which is similar to the seal 5 mentioned above. The seal 25 is, for example, an O-ring seal. The seal is used to generate friction between the volute 2 and the right fuselage shell 12 during the rotation of the volute 2 relative to the fuselage 1, more specifically during the rotation of the right volute 21 relative to the right fuselage shell 12, and after the volute 2 rotates to a certain position, the volute is kept in the position by friction, that is, in the fixed rotational orientation and no longer rotated relative to the fuselage 1. Thereby, the volute 2 can rotate relative to the fuselage 1, preferably up to 180 degrees, for example Figure 4 As shown, it is possible to work at several different rotation angles. Figure 8 , optionally, a biasing mechanism may be provided to achieve rotation at a fixed angle. For example, the left / right volute may be provided with a plurality of notches 210 corresponding to different angles, and the housing 12 may be provided with a biasing mechanism, such as a pin 121 biased by a spring (not shown), and when the pin 121 is aligned with the notch 210 at one of the angles, the pin 121 engages with the notch 210. By providing a notch and a corresponding biasing mechanism (e.g., including a spring and a pin 121), the volute is allowed to be fixed at a plurality of different angles relative to the housing. The notch 210 is provided in a rounded shape, so that when a user applies a force sufficient to overcome the biasing force of the spring (e.g., when a user applies a sufficiently large rotational force on the volute), the pin 121 may be disengaged from the notch 210, so that the volute can continue to rotate, such as rotating into another adjacent notch, thereby changing the fixed angle of the volute relative to the housing.

[0048] Figure 4 1 shows a front view of a portable blower 1000 according to an embodiment of the present invention, wherein the upper figure shows the volute of the portable blower in the maximum extended state during operation, and the lower figure shows the volute in the folded state after being rotated 180 degrees. Since the volute 2 of the present invention can rotate relative to the body 1, preferably by a maximum of 180 degrees, the portable blower can be stored and transported, for example, in a Figure 4 The stowed position or folded state in the figure below can save space and reduce costs.

[0049] Figure 5 The portable blower 1000 according to an embodiment of the present invention is shown along Figure 4 The cross-sectional view is taken along the line AA of FIG. 1 , wherein the motor 7 and the volute 2 and the fan 24 are shown in a cutaway manner. Figure 5As shown, in the installed state, the fixing ring 27 is fixed to the left fuselage shell 11 from the right side of the left volute 22, for example, by fasteners, so that the sealing member 5 is compressed between the left fuselage shell 11 and the left volute 22. The left volute 22 can rotate relative to the left fuselage shell 11, and the sealing member 5 provides damping for the rotation and keeps the left volute 22 in a selected rotation position or orientation by friction. Similarly, in conjunction with reference Figure 6 After the air inlet cover 26 is snap-connected to the corresponding tongue 211 of the right volute 21, for example, by means of the tongue 261, the seal 25 is compressed between the right fuselage shell 12 and the right volute 21. The right volute 21 can rotate relative to the right fuselage shell 12, and the seal 25 provides damping for the rotation and maintains the right volute 21 in a selected rotational position or orientation by friction.

[0050] refer to Figure 5 In a preferred embodiment, the left volute 22 and the right volute 21 have grooves and protrusions on the interface between them, respectively, to achieve good sealing of the interface. Figure 5 As shown, the left volute 22 includes a groove 221 at the interface, and the right volute 21 includes a protrusion 212 at the interface. When the left volute 22 and the right volute 21 are installed together, the protrusion 212 is inserted into the groove 221, thereby achieving a good sealing of the interface, thereby preventing the wind flow from leaking out from the interface between the left volute 22 and the right volute 21, thereby improving the effect of blowing.

[0051] In an embodiment of the present invention, the air inlet cover 26 and the motor 7 are respectively located on both sides of the volute 2, and the centrifugal fan 24 is located inside the volute 2. This compact design is advantageous in achieving a good blowing effect and improving the blowing efficiency.

[0052] Figure 6 A perspective view of a volute 2 and a fan 24 of a portable blower 1000 according to an embodiment of the present invention is shown, wherein the fan 24 is accommodated in the volute 2 . Figure 6It is also shown from another angle that the left volute 21 further includes a tongue 211 and blocks 213 located on both circumferential sides of the tongue 211. In a preferred embodiment of the present invention, the block 213 is close enough to the tongue 211 so that after the air inlet cover 26 is snap-connected to the corresponding tongue 211 of the right volute 21, the block 213 stops the tongue 261 of the air inlet cover 26 to prevent the air inlet cover 26 from rotating relative to the right volute 21 and sliding out of the right volute 21 to disengage. The tongue is an example of a coupling mechanism, which is used to couple the air inlet cover 26 to the volute 2. Therefore, this configuration ensures that during the rotation of the volute 2, the air inlet cover 26 rotates with the volute 2, thereby ensuring that sufficient axial wind flow enters the air inlet cover 26 without being affected by the rotation of the volute 2.

[0053] Figure 7 A perspective view schematically shows an example of a blowpipe of a portable blower 1000 according to an embodiment of the present invention. Figure 7 As shown in the figure above, the blowing tube 10' includes a small brush 101' to facilitate the cleaning or removal of debris or dirt to be cleaned, and the small brush is combined with the blowing operation to more conveniently clean the debris or dirt. In another example, as Figure 7 As shown in the figure below, the blowing pipe can be a flat-mouthed blowing pipe 10″, so that the blowing operation can be performed in a narrow space such as a slit, so as to facilitate blowing.

[0054] Although this specification is described in accordance with the implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art. The scope of the present invention is defined by the appended claims rather than the above description, and therefore it is intended that all changes within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0055] For those skilled in the art, the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, the above embodiments should be regarded as exemplary and non-restrictive.

Claims

1. A portable blower, comprising: A body, the body comprising a body shell and formed with a grip portion; an airflow generating device, the airflow generating device being connected to the body shell, the airflow generating device comprising a motor and a fan driven by the motor to rotate to generate airflow; and a volute housing the fan therein, the volute comprising an air inlet and an air outlet in fluid communication; The volute can be rotated relative to the fuselage, preferably at most 180 degrees, so that the angle of the air outlet can be adjusted.

2. The portable blower according to claim 1, wherein: A seal is provided between the volute and the fuselage casing, the seal damping rotation of the volute relative to the fuselage casing.

3. The portable blower according to claim 1 or 2, wherein: The air outlet extends outwardly tangentially relative to the volute, the fan is a centrifugal fan, and air enters the volute approximately axially through the air inlet.

4. The portable blower according to claim 1 or 2, wherein: The volute includes a left volute and a right volute, and the seal is arranged between the left volute and the fuselage shell, and / or the seal is arranged between the right volute and the fuselage shell.

5. The portable blower according to claim 4, wherein: The motor shaft of the motor passes through the left volute from the left side, and the fan is fixed to the motor shaft.

6. The portable blower according to claim 4, wherein: The left and right volutes are respectively provided with grooves and protrusions on the interface therebetween to prevent airflow from leaking from the interface when they are mounted together.

7. The portable blower according to claim 1 or 2, wherein: An air inlet cover is attached to the volute from a side opposite to the motor and corresponds to an air inlet portion of the volute, thereby facilitating air to enter the volute through the air inlet cover.

8. The portable blower according to claim 7, wherein: The air inlet cover is coupled to the volute by a coupling mechanism, and during rotation of the volute, the air inlet cover rotates together with the volute.

9. The portable blower according to claim 2, wherein: The seal is an O-ring seal disposed between the volute and the fuselage casing.

10. The portable blower according to claim 1 or 2, wherein: The portable blower includes a rechargeable battery disposed in the body housing, and the body housing housing the rechargeable battery is a handheld portion.

11. The portable blower according to claim 1 or 2, wherein: Also included is a blowing pipe, which is connected to the air outlet of the volute to facilitate guiding the air flow.

12. The portable blower according to claim 1 or 2, wherein: The volute is provided with a plurality of spaced apart notches and the housing is provided with a biasing mechanism to allow the volute to be fixed at a plurality of different angles relative to the housing.

13. The portable blower according to claim 12, wherein: The biasing mechanism includes a spring-biased pin, and the notch is configured to be rounded so that the pin can be disengaged from the notch when a user applies a force sufficient to overcome the spring biasing force.

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