CN211547562U

CN211547562U - Air blowing device and direct current electric tool

Info

Publication number: CN211547562U
Application number: CN201921678297.1U
Authority: CN
Inventors: 查霞红; 赵凤丽; 刘常华
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2019-10-09
Filing date: 2019-10-09
Publication date: 2020-09-22
Anticipated expiration: 2029-10-09
Also published as: WO2021068822A1

Abstract

The utility model relates to a blast apparatus and DC electric tool, this blast apparatus include bear subassembly and hair-dryer, bear the subassembly including the back of the body, set up on the back of the body and be used for realizing the back of the body area of wearing or binding, set up on the back of the body and provide the power supply system of power for the hair-dryer, and connect the connecting device of the back of the body and hair-dryer, connecting device includes elastic construction, and the hair-dryer can bear body multi-angle swing relatively through elastic construction. The backpack body of the blowing device is connected with the blower through the connecting device, and the elastic structure of the connecting device realizes that the blower can swing on multiple angles relative to the backpack body, thereby being beneficial to ensuring that the operation of the blower is easier.

Description

Air blowing device and direct current electric tool

Technical Field

The utility model relates to a garden instrument especially relates to a blast apparatus and direct current electric tool.

Background

The blower is a commonly used garden tool and helps a user to clean the residual branches, fallen leaves, dust, accumulated water and the like in the garden. The direct current blower powered by the battery pack is popular due to the advantages of convenience in operation, portability in moving and the like. However, due to the limitation of battery capacity, the performance and the cruising ability of the hair dryer are limited to a certain extent. If the battery capacity is increased, the battery pack is heavy, and the user cannot hold the battery pack conveniently.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a blast apparatus, power supply system can bear, and can realize the relative knapsack body swing of hair-dryer, makes the operation lighter.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a blowing device, includes knapsack subassembly and hair-dryer, the knapsack subassembly includes the knapsack body, sets up on the knapsack body and be used for realizing the knapsack area of dressing or binding, set up and be in do on the knapsack body the hair-dryer provides the power supply system of power and connects the knapsack body with the connecting device of hair-dryer, connecting device includes elastic construction, the hair-dryer can pass through elastic construction is relative the knapsack body multi-angle swing.

In one embodiment, the connecting device further comprises a connecting rod located between the backpack body and the blower, a mating part arranged on the connecting rod and mated with the blower, and a backpack mating part mated with the backpack body, at least one end of the elastic structure is connected with the connecting rod, and the axis of at least part of the elastic structure is coincident with or parallel to the axis of at least part of the connecting rod.

In one embodiment, the resilient structure is a spring.

In one embodiment, the connecting rod at least comprises a second rod body section connected with the backpack body and a first rod body section which is connected with the second rod body section in a rotating manner and arranged at an angle, the first rod body section extends along the front-back direction of the backpack body, the end of the elastic structure is connected with the end of the first rod body section far away from the second rod body section and then is connected with the hair dryer through the connecting part, and the axis of the elastic structure is parallel to or coincident with the axis of the first connecting rod;

or, the connecting rod includes at least one edge back of the body front and back direction extend and with the body of rod section that back of the body links to each other, the tip of elastic construction with the connecting rod is kept away from the tip of back of the body links to each other the back passes through connect the portion of joining in marriage with the hair-dryer connects, just the axis of elastic construction with the axis of rod section is parallel or the coincidence.

In one embodiment, the connecting rod comprises a connecting section connected with an elastic structure, the connecting section is a columnar structure with an oval cross section, and a cylindrical cavity is formed in the elastic structure; the connection section is inserted in the cylindrical cavity, the connection section is provided with a contact part located on the longest diameter and a free part located on the shortest diameter, the contact part is in interference fit with the inner wall of the cylindrical cavity, and a movable gap is formed between the free part and the inner wall of the cylindrical cavity.

In one embodiment, the hair dryer is provided with a receiving groove, the elastic structure is connected with the hair dryer through a connecting part, at least part of the elastic structure is received in the receiving groove, and a gap is formed between the groove wall of the receiving groove and the outer surface of the elastic structure.

In one embodiment, the backpack butt joint part and the backpack body are assembled through a universal joint structure and/or a sliding rail structure to realize connection.

In one embodiment, the connecting device further comprises a connecting rod between the backpack body and the blower, a mating part arranged on the connecting rod and mated with the blower, and a backpack docking part docked with the backpack body, and the elastic structure is arranged between the backpack docking part and the backpack body.

In one embodiment, a joint component for realizing the swinging of the connecting rod relative to the carrier body is arranged between the carrier butt joint part and the carrier body, the elastic structure is a torsion spring arranged between the joint component and the carrier body, and the blower can swing relative to the carrier body through the torsion spring.

In one embodiment, the backpack assembly further comprises a protrusion extending outward from the backpack body, and the connecting rod is connected to the protrusion.

In one embodiment, the hair dryer is further provided with an electrical interface, the backpack assembly is provided with an electrical interface which is butted with the electrical interface to connect the power supply system and the motor, and the electrical interface is arranged on the matching part so as to synchronously realize the installation of the electrical interface and the electrical interface through the installation of the matching part.

The utility model also provides a direct current electric tool, including bearing subassembly and instrument main part, the bearing subassembly is in including the back of the body, setting just be used for realizing wearing or the back of the body area of binding, setting on the back of the body and be in on the back of the body do the instrument main part provides the power supply system of power and connects the back of the body with the connecting device of instrument main part, connecting device includes elastic construction, the instrument main part passes through elastic construction is relative back of the body multi-angle swing.

The utility model also provides a blast apparatus, including bearing subassembly and hair-dryer, bear the subassembly including the back of the body burden body, setting and be in on the back of the body burden body and be used for realizing wearing or the back of the body burden area of binding, setting are in on the back of the body burden body do the hair-dryer provides the power supply system of power and connects the back of the body burden body with the connecting device of hair-dryer, the hair-dryer includes: the host shell, the elastic tube and the air tube are sequentially connected, and the air tube can swing relative to the back negative body at multiple angles through the elastic tube; and a motor located within the host housing; the fan is driven by the motor, and the motor drives the air flow generated by the fan to flow through the main machine shell, the elastic pipe and the air pipe.

The beneficial effects of the utility model reside in that: the utility model discloses a blast apparatus and direct current electric tool are all through setting up power supply system on the body of bearing the back, and by realizing hair-dryer or the relative body multi-angle swing of bearing of instrument main part through elastic construction to realize that power supply system can bear, and can make the weight and the recoil of hair-dryer or instrument main part decompose the health through connecting device, can realize hair-dryer or the relative body of bearing the back of instrument main part swing again, help making the operation of hair-dryer lighter.

The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.

Drawings

Fig. 1 is a schematic structural view of a blowing device according to a first embodiment of the present invention;

FIG. 2 is a schematic view of a blower swing of the blower apparatus shown in FIG. 1;

fig. 3 is a schematic structural view of a blowing device according to a second embodiment of the present invention;

fig. 4 is a schematic structural view of the blowing device according to the third embodiment of the present invention;

fig. 5 is a schematic structural view of the blowing device shown in fig. 4 from another view angle;

fig. 6 is a schematic structural view of a blowing device according to a fourth embodiment of the present invention;

FIG. 7 is an enlarged view of a portion of the structure of FIG. 6;

fig. 8 is a schematic structural view of a blowing device according to a sixth embodiment of the present invention;

fig. 9 is a sectional view of the blowing device shown in fig. 8;

fig. 10 is an exploded view of the blowing device shown in fig. 9;

FIG. 11 is a cross-sectional view taken along line B-B of FIG. 10;

FIG. 12 is an enlarged view of a portion of the structure of FIG. 11;

fig. 13 is a schematic structural view of a blowing device according to a sixth embodiment of the present invention;

fig. 14 is a schematic structural view of the blowing device according to the seventh embodiment of the present invention.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do 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 thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

The DC electric tool is supplied power by the DC power supply system to realize work, the DC electric tool comprises a bearing component and a tool main body, the bearing component comprises a back of the body, a back of the body carrying the body, a back carrying belt which is arranged on the back of the body and used for realizing wearing or binding, a power supply system which is arranged on the back of the body and used for providing power for the tool main body, and a connecting device which is connected with the back of the body and the tool main body, the connecting device comprises an elastic structure, and the tool main body can swing through the elastic structure relative to the bearing body at multiple angles. The tool body may be a hand-held tool such as a lawn mower, a cleaning machine, etc., and in this application, taking a blower as an example, when the tool body is a blower, the dc power tool may be referred to as a blower device.

Referring to fig. 1, the blowing device may have a blowing function or a sucking function, which is not limited herein. The blowing device comprises a backpack assembly 10 and a blower 20, wherein the backpack assembly 10 comprises a backpack body 3, a backpack belt 4 (shown in figure 4) which is arranged on the backpack body 3 and used for realizing wearing or binding, a power supply system (not shown) arranged on the backpack body 3, and a connecting device 5 arranged on the backpack body 3, and the power supply system can be a battery pack; the hair dryer 20 includes a housing 1, a fan (not shown) and a motor (not shown) disposed in the housing 1, and an interface structure disposed on the housing 1, the interface structure being connected to a connecting device 5 to connect the backpack body and the hair dryer, and also being connectable to a power supply system to supply power to the hair dryer 20. Specifically, the interface structure includes a mechanical interface (not shown) connected to the connection device, and an electrical interface (not shown) connected to the power supply system. The mechanical interface and the electrical interface can be arranged together, the two interfaces can be connected through one action, the mechanical interface and the electrical interface can also be completely and independently arranged, and the mechanical connection and the electrical connection can be respectively realized through the two connection actions. The connecting device 5 comprises a connecting rod 51 movably mounted on the backrest 3, a mating part 52 arranged on the connecting rod 51 and mated with the mechanical interface of the blower 20, and an elastic structure 53 mated with the connecting rod 51. Of course, the mechanical structure and the electrical interface may be arranged together, and the two interfaces are connected by one action, the connection and matching portion 52 is further provided with an electrical interface (not shown) electrically connected with the electrical interface to enable the power supply system to supply power to the hair dryer, and the electrical interface 2 may be electrically connected with the electrical interface, and may also be connected with the battery pack in a butt joint manner. In detail, the battery pack interface includes a docking plate and a first electrical terminal (not shown) formed on the docking plate for electrically docking with an external power supply device (such as a battery pack) or an electrical interface.

The elastic structure 53 can realize multi-angle swinging of the blower 20 relative to the negative back body 3. Of course, other mechanisms for swinging the blower 20 and the carrier 3 may be provided, not only including the elastic structure. In one embodiment of the present application, with reference to fig. 2 as a reference direction, fig. 1 is a plan view of the backpack assembly 10 worn on the back of a person, a direction indicated by an arrow x in fig. 1 and 2 is a left-right direction of the person's body when the person stands, a direction indicated by an arrow y is a front-back direction of the person's body when the person stands, and a direction indicated by an arrow z in fig. 2 is a height direction of the person's body when the person stands, in this embodiment, the blower 20 is swingable relative to the backpack body 3 in first and second directions a and b, that is, the first direction a is a vertical swing of the blower 20, and the second direction b is a left-right swing. The backpack body 3 of the blowing device is connected with the blower 20 through the connecting device 5, and the elastic structure 53 of the connecting device 5 realizes that the blower 20 can swing at a plurality of angles relative to the backpack body 3, so that the blower 20 can move, the weight and the recoil of the blower 20 can be decomposed to the body through the connecting device 5, and the operation of the blower 20 is easier.

The connecting rod 51 is provided with a bearing abutting part 54 for abutting against the carrier 3, and the engaging part 52 and the bearing abutting part 54 are respectively provided at both ends of the connecting device 5. In the present embodiment, the connecting rod 51 extends along the front-back direction of the carrier body 3, and the elastic structure 53 is an elastic member 53 disposed coaxially with the connecting rod 51, specifically: the axis of the elastic structure coincides with the axis of the connecting rod 51, and indeed, in other embodiments, the axis of the elastic structure may be set to be parallel to the axis of the connecting rod 51, for example, the connecting rod 51 is set to be an L-shaped structure, at this time, a part of the rod body section of the connecting rod 51 extends along the front-back direction of the backpack body, the axis of the part of the rod body section is parallel to the axis of the elastic structure, and the end of the elastic structure is connected with the end of the connecting rod 51 far away from the backpack body and then is connected with the blower 20 through the connection part. The elastic member 53 is embodied as a spring. The elastic member 53 is disposed on the connecting rod 51 between the connecting rod 51 and the fitting portion 52, and one end of the elastic member 53 is connected to one end of the connecting rod 51 away from the backpack body 3 (i.e., not the backpack engaging portion 54), and the other end is connected to the fitting portion 52. In order to make the whole structure more compact and the appearance more beautiful, the housing 1 of the hair dryer 20 is provided with a receiving groove 11, the elastic member 53 is at least partially received in the receiving groove 11, and a gap is formed between the groove wall of the receiving groove 11 and the outer surface of the elastic member 53. By accommodating the elastic member 53 in the accommodating groove 11 and forming a gap between the accommodating groove 11 and the elastic member 53, the elastic member 53 can be deformed (i.e., bent to a certain extent determined by the bending force of the elastic member 53 and the size of the gap) in the accommodating groove 11, so that the hair dryer 20 can swing to a certain extent. In addition, the supporting force of the elastic member 53 can be increased by the arrangement of the receiving groove 11 to prevent the elastic member 53 from being excessively deformed. In order to increase the flexibility, the connection between the carrying abutment 54 and the carrier 3 is provided by a universal joint structure (not shown) so that the blower 20 can swing in the first direction a and the second direction b with respect to the carrier assembly 10. The universal joint structure is a common component in existing mechanical designs and will not be described in detail here. In this embodiment, in order to make the backpack assembly 10 and the blower 20 butt and to facilitate the operation of the blower 20, in this embodiment, the backpack assembly 10 further includes a protruding portion 31 formed to extend outward from the backpack body 3 toward the left side of the human body, the backpack butt portion 54 is connected to the protruding portion 31 by a universal joint structure, and the connecting rod 51 extends in the front-rear direction of the human body. Of course, in other embodiments, the protrusion 31 may be disposed on the right side of the human body. In practical design, the force for driving the elastic member 53 to deform is designed to be greater than the force for driving the universal joint structure to move, when the hair dryer 20 needs to swing relative to the backrest 3, the force applied to the hair dryer 20 will move the universal joint structure, and after the universal joint structure moves to an extreme position, if the force applied to the hair dryer 20 increases again, the elastic member 53 will deform (bend).

In the above embodiment, only one connection mode for moving the hair dryer 20 relative to the backpack body 3 is shown, and other connection structures may be adopted instead, and a detailed description will be given below for some other connection structures for moving the hair dryer 20 relative to the backpack body 3.

Referring to fig. 3, the difference between the connecting rod 61 of the second embodiment and the connecting rod of the first embodiment is that in the second embodiment, the connecting rod 61 is partially inserted into the backpack body 3, and the connecting rod 61 can slide along the longitudinal direction of the hair dryer 20 relative to the backpack body 3 (the longitudinal direction is the front-back direction when the human body stands, i.e., the direction indicated by the arrow y in fig. 3). Specifically, the method comprises the following steps: the back support body 3 is provided with an insertion groove 33, the back support abutting part 64 of the connecting rod 61 is inserted into the insertion groove 33, the insertion groove 33 and the back support abutting part 64 are connected through a slide rail assembly (not shown) which extends along the front and back direction (the direction indicated by the arrow y in fig. 3) when the human body stands, and the slide rail assembly adopts the conventional structure in the prior art, so the description is omitted. The second blower 20 of the present embodiment moves relative to the backpack assembly 10 in the following manner: the hair dryer 20 can move back and forth relative to the bearing assembly 10 in the front and back direction when the human body stands by the cooperation of the bearing butt part 64 and the insertion groove 33, the hair dryer 20 can swing relative to the bearing body 3 by the elastic deformation of the elastic member 53, and the assembly mode of the connecting rod 61 and the elastic member 53 directly, the swing principle and the swing direction of the elastic member 53 are the same as those of the first embodiment.

Referring to fig. 4 and 5, in the third embodiment, the connecting rod 71 includes a first rod body section 74 and a second rod body section 75, the first rod body section 74 extends along the front-back direction of the backpack body 3, the second rod body section 75 is connected to the backpack body 3 and extends along the left-right direction of the backpack body 3, and the first rod body section 74 and the second rod body section 75 are rotatably connected and are disposed at an angle. The first rod segment 74 is abutted at its both ends with the elastic member 73 and the second rod segment 75, respectively. The elastic member 73 and the connecting rod 71 are assembled in the same manner as in the first embodiment, the elastic member 73 is also a spring, the elastic member 73 is disposed on the first rod segment 74, and the axis of the elastic member 73 overlaps with the axis of the first rod segment 74. of course, in other embodiments, the axis of the elastic member 73 may be disposed parallel to the axis of the first rod segment. The first rod body segment 74 and the second rod body segment 75 are connected by a hinge (not shown), the first rod body segment 74 can swing around the second direction b relative to the second rod body segment 75, one end of the second rod body segment 75 away from the first rod body segment 74 is connected with the backpack body 3 by a universal joint structure (not shown) or a hinge (not shown), the second rod body segment 75 can swing around the first direction a relative to the backpack body 3, and the coupling part 52 coupled with the blower 20 is disposed at one end of the elastic member 73 away from the first rod body segment 74. In the third embodiment, the elastic member 73 is not inserted into the blower 20, but is located outside the blower 20. The third embodiment of the present invention has the following moving modes of the blower 20 relative to the backpack assembly 10: the blower 20 can swing relative to the back negative body 3 through the elastic deformation of the elastic piece 73; the first rod segment 74 is hinged to the second rod segment 75 to enable the blower 20 to swing in the second direction b relative to the backpack body 3, and the second rod segment 75 is hinged to the backpack body 3 to enable the blower 20 to swing in the first direction a relative to the backpack body 3.

Referring to fig. 6 and 7, the connection device 8 of the fourth embodiment includes a connection rod 81, a joint component 82 disposed on one end of the connection rod 81, a mating portion 83 disposed on the other end of the connection rod 81 and mated with the blower 20, a mating portion 83 disposed on the connection rod 81 and mated with the blower 20, and a backpack mating portion (not numbered) mated with the backpack 3. The structure of the mating portion 83 in the fourth embodiment is the same as that in the first embodiment. Be provided with between knapsack butt joint portion and the knapsack body 3 and realize connecting rod 82 and the wobbling joint subassembly 82 of knapsack body 3 relatively, this joint subassembly 82 inserts in knapsack body 3 in order to make connecting rod 81 rotate relatively knapsack body 3 through joint subassembly 82, and is specific: cylindrical hole 31 is opened on the body 3, joint component 82 includes cylinder (not numbered) that is used for inserting into cylindrical hole 31, with cylinder swing joint's loose end (not shown), the loose end setting is on connecting rod 81, the loose end can rotate around second direction b relative to the cylinder, be clearance fit between cylindrical hole 31 and the cylinder, the cylinder can be in cylindrical hole 31 relative to the inner wall swing of cylindrical hole 31. The cylinder is rotatable in the cylindrical hole 31 about a first direction a. The connecting rod 81 is L-shaped, and the cylindrical hole 31 is located on the right side of the dorsum body 3. The elastic structure 84 is located between the cylindrical hole 31 and the cylinder, the elastic structure 84 is a torsion spring 84, the blower can swing along the first direction a against the torsion spring 84, and in addition, the torsion spring 84 can provide torque to assist in supporting the blower 20 against gravity. The fourth embodiment of the present invention has the following moving modes of the blower 20 relative to the backpack assembly 10: the blower 20 can swing left and right relative to the backpack body 3 through the matching between the movable end of the connecting rod 81 and the cylinder, the blower 20 can swing up and down relative to the backpack body 3 through the matching between the cylinder and the cylindrical hole, the limitation of the torsion spring 84 can be overcome, the swing in the first direction can be realized, the torque is provided, and the gravity is overcome.

Referring to fig. 8 to 12, the connecting rod 51 ' of the fifth embodiment includes a connecting section 54 ' connected to the elastic member 53 ' and an inserting section 55 ' extending horizontally outward from the connecting section 54 ', and the engaging portion 83 ' is located at an end of the elastic member 53 ' far from the connecting section 54 ', and the engaging portion 83 ' will be described in detail later. In this embodiment, the elastic member 53 'is also a spring, which is coaxially disposed with the engaging section 54'. The connecting section 54 'is a cylindrical structure with an elliptic section, and a cylindrical cavity (not numbered) is formed in the elastic piece 53'; the engagement section 54 'is inserted into the cylindrical cavity, the engagement section 54' has a contact portion 541 'located on the longest diameter and a free portion 542' located on the shortest diameter (i.e. the engagement section 54 'is similar to an elliptical cylinder), the contact portion 541' and the inner wall of the cylindrical cavity are in interference fit, the free portion 542 'and the inner wall of the cylindrical cavity have a clearance, and the insertion section 55' is inserted into the carrier 3. In order to facilitate the assembly of the engaging section 54 'with the elastic member 53', an assembly cavity 57 'is formed outside the engaging section 54', and the elastic member 53 'is partially inserted into the assembly cavity 57'. The fitting cavity 57' is formed as follows: the connecting rod 51 'further includes a mounting ring 56' formed outside the engagement section 54 ', the mounting ring 56' enclosing the engagement section 54 'to form a mounting cavity 57'. The carrying body 3 is provided with an insertion groove 33 which is matched with the insertion section 55'. In the present embodiment, in order to facilitate the assembly of the elastic member 53 'with the fitting portion 83', a fitting groove 831 'into which the elastic member 53' is partially inserted is concavely formed at a side of the fitting portion 83 'facing the elastic member 53'. The movement of the blower 20 relative to the dorsum 3 in the sixth embodiment is as follows: the blower 20 can swing relative to the back negative body 3 through the elastic member 53 ', and the blower 20 can swing in a certain direction relative to the back negative body 3 through the cooperation of the elastic member 53 ' and the cylindrical cavity, in detail, since the elastic member 53 ' is a cylindrical cavity, and the engagement section 54 ' inserted into the cylindrical cavity is similar to an elliptical cylinder, the elastic member 53 ' can swing in the shortest diameter direction of the engagement section 54 ' relative to the engagement section 54 '.

Referring to fig. 13, in the sixth embodiment, a sliding device is added on the basis of the first to fifth embodiments so that the connecting device 9 can slide relative to the backrest 3. In detail, the sliding device is composed of a lifting rail 31 and a sliding member (not numbered) provided on the lifting rail 31, the carrier body 3 is provided with the lifting rail 31 extending in the height direction (the direction indicated by the arrow z in fig. 8) of the carrier assembly 10, and the connecting device is mounted on the lifting rail 31 through the sliding member and is movable on the lifting rail 31 in the longitudinal direction of the lifting rail 31.

In the present embodiment, the power supply system includes a built-in battery pack (not shown), and a battery cavity for accommodating the built-in battery pack is formed in the back body 3, so that the weight of the built-in battery pack can be effectively decomposed to the body. The backpack body 3 is connected with the blower 2 through the connecting device 5, so that the blower 20 is conveniently butted with the backpack body 3, and the improvement of man-machine operation is facilitated.

In addition, the utility model discloses still provide a blast apparatus as shown in figure 14, this blast apparatus bears subassembly 10 and hair-dryer 20. The backpack assembly 10 may be any of those described above, but is not limited thereto, and may have other configurations. The hair drier comprises a main machine shell 211, an elastic tube 212, an air pipe 213, a motor and a fan; the main body 211, the elastic tube 212 and the wind tube 213 are connected in sequence to form an airflow channel, the motor is located in the main body 211 to drive the fan to form airflow flowing through the main body 211, the elastic tube 212 and the wind tube 213, the wind tube 213 can swing relative to the backpack body through the elastic tube 212 in multiple angles, and the elastic tube 212 can be a corrugated tube.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a blowing device, includes bears subassembly and hair-dryer, its characterized in that, bear the subassembly and include the back of the body, set up and be in on the back of the body and be used for realizing wearing or the back of the body area of binding, set up and be in on the back of the body do the hair-dryer provides the power supply system of power, and connect the back of the body with the connecting device of hair-dryer, connecting device includes elastic construction, the hair-dryer can pass through elastic construction is relative back of the body multi-angle swing.

2. The blowing device of claim 1, wherein the connecting device further includes a connecting rod between the backpack body and the blower, a mating portion disposed on the connecting rod and mating with the blower, and a backpack mating portion mating with the backpack body, at least one end of the elastic structure is connected to the connecting rod, and an axis of at least a portion of the elastic structure coincides with or is parallel to an axis of at least a portion of the connecting rod.

3. The blowing device of claim 2, wherein the resilient structure is a spring.

4. The blowing device of claim 2, characterized in that: the connecting rod at least comprises a second rod body section connected with the back negative body and a first rod body section which is rotatably connected with the second rod body section and arranged at an angle, the first rod body section extends along the front-back direction of the back negative body, the end part of the elastic structure is connected with the end part of the first rod body section far away from the second rod body section and then is matched and connected with the blower through the matching part, and the axis of the elastic structure is parallel to or coincident with the axis of the connecting rod;

5. The blowing device according to claim 2, wherein the connecting rod includes an engaging section connected to the elastic structure, the engaging section is a columnar structure with an oval cross section, and a cylindrical cavity is formed in the elastic structure; the connection section is inserted in the cylindrical cavity, the connection section is provided with a contact part located on the longest diameter and a free part located on the shortest diameter, the contact part is in interference fit with the inner wall of the cylindrical cavity, and a movable gap is formed between the free part and the inner wall of the cylindrical cavity.

6. The blowing device of claim 2, wherein the blowing device is provided with a receiving groove, the elastic structure is connected to the blowing device through a connecting portion, at least a portion of the elastic structure is received in the receiving groove, and a gap is provided between a wall of the receiving groove and an outer surface of the elastic structure.

7. The blowing device of claim 2, wherein the backpack docking portion and the backpack body are assembled to achieve the connection by a universal joint structure and/or a sliding rail structure.

8. The blowing device of claim 1, wherein the connection device further includes a connection rod between the backpack body and the blower, a mating portion disposed on the connection rod and mated with the blower, a backpack mating portion mated with the backpack body, and the elastic structure is disposed between the backpack mating portion and the backpack body.

9. The hair dryer of claim 7, wherein a joint assembly for allowing the connecting rod to swing with respect to the carrier is provided between the carrier docking portion and the carrier, and the elastic structure is a torsion spring provided between the joint assembly and the carrier, and the hair dryer can swing with respect to the carrier by the torsion spring.

10. The blowing device of any one of claims 2 to 9, wherein the backpack assembly further includes a protrusion formed to extend outward from the backpack body, the connection rod being connected to the protrusion.

11. The blowing device of claim 10, wherein the blowing machine further has an electrical interface, the backpack assembly has an electrical interface for connecting the power supply system and the motor, and the electrical interface is disposed on the mating portion to achieve the installation of the electrical interface and the electrical interface synchronously by the installation of the mating portion.

12. The utility model provides a direct current electric tool, includes bears subassembly and tool subject, its characterized in that, bear the subassembly including the back of the body, set up and be in on the back of the body and be used for realizing wearing or the back of the body area of binding, set up and be in on the back of the body for the tool subject provides the power supply system of power, and connect the back of the body with the connecting device of tool subject, connecting device includes elastic construction, the tool subject passes through elastic construction is relative the back of the body multi-angle swing.

13. A blowing device comprises a bearing component and a blower, and is characterized in that the bearing component comprises a bearing body, a bearing belt which is arranged on the bearing body and is used for realizing wearing or binding, a power supply system which is arranged on the bearing body and provides power for the blower, and a connecting device which is connected with the bearing body and the blower,

the hair dryer includes:

the host shell, the elastic tube and the air tube are sequentially connected, and the air tube can swing relative to the back negative body at multiple angles through the elastic tube;

and a motor located within the host housing;

the fan is driven by the motor, and the motor drives the air flow generated by the fan to flow through the main machine shell, the elastic pipe and the air pipe.