WO2021068822A1

WO2021068822A1 - Air blowing device and direct-current electric tool

Info

Publication number: WO2021068822A1
Application number: PCT/CN2020/119219
Authority: WO
Inventors: 查霞红; 赵凤丽; 刘常华
Original assignee: 苏州宝时得电动工具有限公司
Priority date: 2019-10-09
Filing date: 2020-09-30
Publication date: 2021-04-15
Also published as: CN211547562U

Abstract

An air blowing device and a direct-current electric tool. The air blowing device comprises a bearing assembly (10) and an air blower (20), wherein the bearing assembly (10) comprises a bearing body (3), a bearing belt (4) arranged on the bearing body (3) and used for wearing or binding, a power supply system arranged on the bearing body (3) and providing power for the air blower (20), and a connecting device (5) connecting the bearing body (3) and the air blower (20), wherein the connecting device (5) comprises an elastic structure (53), and the air blower (20) can swing at multiple angles with respect to to the bearing body (3) by means of the elastic structure (53). The bearing body of the air blowing device is connected with the air blower by means of the connecting device, and the air blower can swing at multiple angles with respect to the bearing body by the elastic structure of the connecting device, such that the air blower can be operated more easily.

Description

Blowing device and DC power tools

This application claims the priority of the Chinese patent application whose application date is October 09, 2019 and the application number is 201921678297.1, the entire content of which is incorporated into this application by reference.

Technical field

The invention relates to a garden tool, in particular to a blowing device and a DC electric tool.

Background technique

The hair dryer is a commonly used garden tool to help users clean up the remaining branches, leaves, dust, and stagnant water in the garden. The DC hair dryer powered by a battery pack is very popular due to its many advantages such as convenient operation and mobile portability. However, limited by the battery capacity, the performance and endurance of the hair dryer have certain limitations. If only the battery capacity is increased, the battery pack will be very heavy at this time, making it inconvenient for the user to hold it.

Summary of the invention

The purpose of the present invention is to provide a blower, the power supply system can be carried, and the blower can swing relative to the carrying body, making the operation easier.

In order to achieve the above objective, the present invention provides the following technical solutions: a blowing device, including a backpack assembly and a hair dryer, the backpack assembly includes a backpack body, a backpack set on the backpack body and used to achieve wearing or binding, set A power supply system for powering the hair dryer on the backpack, and a connecting device that connects the backpack and the hair dryer, the connecting device includes an elastic structure, and the hair dryer can be opposed to the hair dryer through the elastic structure. The carrying body swings at multiple angles.

In one of the embodiments, the connecting device further includes a connecting rod located between the backpack and the hair dryer, a mating part arranged on the connecting rod and mated with the hair dryer, and At least one end of the elastic structure is connected to the connecting rod in the carrying butt connecting portion, and at least part of the axis of the elastic structure coincides with or is arranged in parallel with at least part of the axis of the connecting rod.

In one of the embodiments, the elastic structure is a spring.

In one of the embodiments, the connecting rod includes at least a second rod body section connected to the backpack, a first rod body section rotatably connected to the second rod body section and arranged at an angle, and the first rod body section extends along the The backpack extends in the front-to-rear direction, the end of the elastic structure is connected with the end of the first rod body section away from the second rod body section, and then is mated with the hair dryer through the mating part, and the The axis of the elastic structure is parallel to or coincides with the axis of the first connecting rod;

Alternatively, the connecting rod includes at least one rod segment extending in the front-to-back direction of the backpack and connected to the backpack, and the end of the elastic structure is connected to the end of the connecting rod away from the backpack. The connecting portion is connected to the hair dryer, and the axis of the elastic structure is parallel to or coincides with the axis of the rod body section.

In one of the embodiments, the connecting rod includes a connecting section connected to an elastic structure, the connecting section is a columnar structure with an elliptical cross section, and a cylindrical cavity is formed in the elastic structure; the connecting section is inserted Is connected in the circular cavity, the connecting section has a contact portion located on the longest diameter and a free portion located on the shortest diameter, and there is interference between the contact portion and the inner wall of the cylindrical cavity In cooperation, there is a movable gap between the free portion and the inner wall of the cylindrical cavity.

In one of the embodiments, the hair dryer is provided with a receiving groove, the elastic structure is connected to the hair dryer through a mating portion, and at least part of the elastic structure is received in the receiving groove, and the groove of the receiving groove A gap is provided between the wall and the outer surface of the elastic structure.

In one of the embodiments, the carrying joint and the carrying body are assembled through a universal joint structure and/or a sliding rail structure to achieve connection.

In one of the embodiments, the connecting device further includes a connecting rod located between the carrying body and the hair dryer, a connecting part provided on the connecting rod and mated with the hair dryer, and a carrying body The butt-butting backpack, the elastic structure is arranged between the butt-back portion and the backpack body.

In one of the embodiments, a joint assembly that realizes the swinging of the connecting rod relative to the backpack body is provided between the backpack docking portion and the backpack body, and the elastic structure is arranged between the joint assembly and the backpack body The torsion spring, the hair dryer can swing relative to the carrying body through the torsion spring.

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

In one of the embodiments, the hair dryer is further provided with an electrical interface, and the backpack assembly is provided with an electrical interface that is docked with the electrical interface to connect the power supply system and the motor, and the electrical interface is provided on the interface. On the fitting part, the installation of the electrical interface and the electrical interface is realized synchronously through the installation of the fitting part.

The present invention also provides a DC electric tool, including a backpack assembly and a tool body. The backpack assembly includes a backpack body, a backpack belt arranged on the backpack body and used for wearing or binding, and a backpack set on the backpack body. A power supply system for powering the tool body and a connecting device connecting the backpack body and the tool body, the connecting device includes an elastic structure, and the tool body is relatively more than the backpack body through the elastic structure. Angle swing.

The present invention also provides a blowing device, including a backpack assembly and a hair dryer. The backpack assembly includes a backpack body, a backpack belt arranged on the backpack body and used for wearing or binding, and the backpack body is arranged on the backpack body. The power supply system provided by the blower and the connecting device connecting the backpack and the blower, the blower includes: sequentially connected to a host casing, an elastic tube, and an air tube, and the air tube can pass through the elastic tube. It swings at multiple angles relative to the backpack; and a motor located in the mainframe housing; a fan driven by the motor, and the airflow generated by the fan driven by the motor flows through the mainframe housing, elastic tubes, and air ducts.

The beneficial effect of the present invention is that the air blowing device and the DC power tool of the present invention both provide the power supply system on the backpack, and realize that the hair dryer or the tool body can swing at multiple angles relative to the backpack through the elastic structure, so that the power supply system can be swung. It can not only make the weight and recoil of the hair dryer or the tool body be broken down to the body through the connecting device, but also realize the swing of the hair dryer or the tool body relative to the shoulder body, which helps to make the operation of the hair dryer easier.

The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly and implement it in accordance with the content of the description, the preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

Description of the drawings

FIG. 1 is a schematic structural diagram of a blowing device shown in Embodiment 1 of the present invention;

Fig. 2 is a schematic diagram of the swing of the blower of the blowing device shown in Fig. 1;

3 is a schematic diagram of the structure of the blowing device shown in the second embodiment of the present invention;

4 is a schematic structural diagram of a blowing device shown in Embodiment 3 of the present invention;

Fig. 5 is a schematic structural diagram of the blowing device shown in Fig. 4 from another perspective;

6 is a schematic structural diagram of a blowing device shown in Embodiment 4 of the present invention;

Figure 7 is an enlarged view of part of the structure in Figure 6;

8 is a schematic structural diagram of a blowing device shown in Embodiment 6 of the present invention;

Figure 9 is a cross-sectional view of the blowing device shown in Figure 8;

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

Figure 11 is a cross-sectional view in the direction of B-B in Figure 10;

Figure 12 is an enlarged view of part of the structure in Figure 11;

13 is a schematic structural diagram of a blowing device shown in Embodiment 6 of the present invention;

Fig. 14 is a schematic structural diagram of a blowing device shown in the seventh embodiment of the present invention.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within 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", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the pointed device or element must have a specific orientation or a specific orientation. The structure and operation cannot therefore be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected", and "connected" should be understood in a broad sense unless otherwise clearly specified and limited. For example, they can be fixed or detachable. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in the present invention can be understood in specific situations.

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

The DC power tool is powered by a DC power supply system to achieve work. The DC power tool of the present application includes a backpack component and a tool body. The backpack component includes a backpack body, a backpack belt arranged on the backpack body and used for wearing or binding. A power supply system for powering the tool body on the body and a connecting device connecting the backpack body and the tool body. The connecting device includes an elastic structure through which the tool body swings at multiple angles relative to the backpack body. The tool body can be a hand-held tool such as a lawn mower, a washing machine, etc. In this application, a hair dryer is taken as an example. When the tool body is a hair dryer, the DC power tool can be called a blowing device.

Please refer to Figure 1. The blowing device may have a blowing function or a suction function, which is not limited here. The blowing device includes a backpack assembly 10 and a hair dryer 20. The backpack assembly 10 includes a backpack body 3, a backpack belt 4 (see Figure 4) arranged on the backpack body 3 and used for wearing or binding (see Figure 4), and a power supply set on the backpack body 3. A system (not shown) and a connecting device 5 installed on the backpack 3. The power supply system may be a battery pack; the hair dryer 20 includes a housing 1, a fan (not shown) and a motor arranged in the housing 1 (Not shown) and an interface structure provided on the housing 1, the interface structure is connected to the connecting device 5 to connect the backpack to the hair dryer, and can also be connected 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 connecting device, and an electrical interface (not shown) connected to the power supply system. The mechanical interface and the electrical interface can be set together, and the two interfaces can be connected through one action, or they can be set completely independently, and the mechanical connection and the electrical connection can be realized respectively through two connection actions. The connecting device 5 includes a connecting rod 51 movably mounted on the backpack 3, a connecting portion 52 arranged on the connecting rod 51 and mated with the mechanical interface of the hair dryer 20, and an elastic structure 53 matched with the connecting rod 51. Of course, the mechanical structure and the electrical interface can be set together to realize the mating of the two interfaces through one action. The mating part 52 is also provided with an electrical interface (not shown) that is electrically connected to the electrical interface so that the power supply system can supply power to the hair dryer. As shown), the electrical interface can be electrically connected to the electrical interface, and can also be docked with the battery pack. In detail, the battery pack interface includes a docking board and a first electrical terminal (not shown) formed on the docking board for electrically docking with an external power supply device (such as a battery pack) or an electrical interface.

The elastic structure 53 can realize the multi-angle swing of the hair dryer 20 relative to the backpack 3. Of course, other mechanisms that can swing the hair dryer 20 and the backpack 3 can also be provided, not just including the elastic structure. In the first embodiment of the present application, taking Figure 2 as the reference direction, Figure 1 is a top view of the backpack assembly 10 worn on the back of the body, and the direction indicated by the arrow x in Figures 1 and 2 is the left and right direction of the body when the person is standing. , The direction indicated by the arrow y is the front and rear direction of the body when the person is standing, and the direction indicated by the arrow z in FIG. 2 is the height direction of the body when the person is standing. In this embodiment, the hair dryer 20 can be relative to the carrying body 3 along the first direction a, the first direction Swing in the two directions b, that is, the first direction a refers to the up and down swing of the hair dryer 20, and the second direction b refers to the left and right swing. The carrying body 3 of the blowing device is connected to the hair dryer 20 through the connecting device 5, and the elastic structure 53 of the connecting device 5 realizes that the hair dryer 20 can swing at multiple angles relative to the carrying body 3, so that the hair dryer 20 can be moved and the hair dryer 20 can be moved. The weight and recoil are broken down to the body through the connecting device 5, which helps to make the operation of the hair dryer 20 easier.

The connecting rod 51 is provided with a backpack docking portion 54 for docking with the backpack body 3, and the docking portion 52 and the backpack docking portion 54 are respectively provided at both ends of the connecting device 5. In this embodiment, the connecting rod 51 extends along the front-rear direction of the backpack 3, and the elastic structure 53 is an elastic member 53 arranged coaxially with the connecting rod 51, specifically: the axis of the elastic structure coincides with the axis of the connecting rod 51 Of course, in other embodiments, the axis of the elastic structure can be set to be parallel to the axis of the connecting rod 51. For example, the connecting rod 51 is set to an L-shaped structure. It extends in the front-to-rear direction, and the axis of this part of the rod body section is parallel to the axis of the elastic structure. The end of the elastic structure is connected to the end of the connecting rod 51 away from the backpack and is connected to the hair dryer 20 through the mating part. The elastic member 53 is specifically a spring. The elastic member 53 is arranged on the connecting rod 51 and is located between the connecting rod 51 and the mating portion 52. One end of the elastic member 53 is connected to the end of the connecting rod 51 away from the back body 3 (that is, not the backing butting portion 54), The other end is connected to the mating part 52. In order to make the overall structure more compact and beautiful in appearance, the housing 1 of the hair dryer 20 is provided with a receiving groove 11, and the elastic member 53 is at least partially received in the receiving groove 11, between the groove wall of the receiving groove 11 and the outer surface of the elastic member 53 A gap is formed. By accommodating the elastic member 53 in the receiving groove 11, and a gap is formed between the receiving groove 11 and the elastic member 53, the elastic member 53 can be deformed in the receiving groove 11 (that is, when the elastic member 53 is bent in a certain range, it is bent Determined according to the bending force of the elastic member 53 and the size of the gap) so that the blower 20 can swing in a certain range. 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 improve the flexibility, the backpack docking portion 54 and the backpack body 3 are assembled through a universal joint structure (not shown) to achieve connection, so that the hair dryer 20 can swing relative to the backpack assembly 10 in the first direction a and the second direction b. . The universal joint structure is a common component in the existing mechanical design, and will not be described in detail here. In this embodiment, in order to dock the backpack assembly 10 with the hair dryer 20 and facilitate the operation of the hair dryer 20, in this embodiment, the backpack assembly 10 further includes a protrusion extending from the backpack body 3 toward the left side of the human body. The portion 31, the carrying butting portion 54 and the protruding portion 31 are connected by a universal joint structure, and the connecting rod 51 extends along the front and back direction of the human body. Of course, in other embodiments, the protrusion 31 may be arranged on the right side of the human body. In the actual design, the force that drives the elastic member 53 to deform is designed to be greater than the force that drives the movement of the universal joint structure. When the hair dryer 20 is required to swing relative to the backpack 3, the force exerted on the hair dryer 20 will first drive the universal joint The structure moves. After the universal joint structure moves to the limit position, if the force exerted on the hair dryer 20 increases, the elastic member 53 will be deformed (bent).

In the first embodiment above, only one connection method for realizing the movement of the hair dryer 20 relative to the backpack 3 is given. In addition, other connection structures can also be used instead. The following is a description of some other ways to realize the movement of the hair dryer 20 relative to the backpack 3 The connection structure is explained in detail.

3, the difference between the connecting rod 61 in the second embodiment and the connecting rod in the first embodiment is that in the second embodiment, the connecting rod 61 is partially inserted into the backpack 3, and the connecting rod 61 can be opposed to the backpack 3. Sliding along the longitudinal direction of the blower 20 (the longitudinal direction is the front-rear direction when the human body is standing, that is, the direction indicated by the arrow y in FIG. 3). Specifically: the backpack body 3 is provided with an insertion slot 33, the backpack docking portion 64 of the connecting rod 61 is inserted into the insertion slot 33, and the insertion slot 33 and the backpack docking portion 64 are connected by a slide rail assembly (not shown), The slide rail assembly extends along the front-to-rear direction (the direction indicated by the arrow y in FIG. 3) when the human body is standing. The slide rail assembly adopts the conventional structure in the prior art, so it will not be repeated here. In the second embodiment, the movement of the hair dryer 20 relative to the backpack assembly 10 is as follows: through the cooperation of the backpack docking portion 64 and the insertion slot 33, the hair dryer 20 can move back and forth relative to the backpack assembly 10 in the forward and backward directions when the human body is standing. The elastic deformation of 53 can realize that the hair dryer 20 can swing relative to the carrying body 3. The direct assembly method of the connecting rod 61 and the elastic member 53, the swing principle and the swing direction of the elastic member 53 are the same as those in the first embodiment.

4 and 5, the connecting rod 71 in the third embodiment includes a first rod body section 74 and a second rod body section 75. The first rod body section 74 extends along the front and back direction of the backpack 3, and the second rod body section 75 is connected to the back The body 3 is connected and extends along the left-right direction of the backpack 3, and the first rod body section 74 and the second rod body section 75 are connected in rotation and arranged at an angle. Two ends of the first rod section 74 are respectively butted with the elastic member 73 and the second rod section 75. The assembly method of the elastic member 73 and the connecting rod 71 is the same as that of the first embodiment. The elastic member 73 is also a spring. The elastic member 73 is arranged on the first rod section 74 and the axis of the elastic member 73 is the same as the axis of the first rod section 74. overlapping. Of course, in other embodiments, the axis of the elastic member 73 may be set to be parallel to the axis of the first rod section. The first rod body section 74 and the second rod body section 75 are connected by a hinge (not shown), and the first rod body section 74 can swing relative to the second rod body section 75 in the second direction b, and the second rod body section 75 is away from the first rod body One end of the segment 74 is connected to the backpack 3 by a universal joint structure (not shown) or hinged (not shown), and the second rod segment 75 can swing relative to the backpack 3 in the first direction a, and is connected to a hair dryer. 20 The mating portion 52 to be mated is provided at the end of the elastic member 73 away from the first rod section 74. The structure of the mating portion 52 in the third embodiment is the same as that of the first embodiment, and the detailed structure will follow description. In the third embodiment, the elastic member 73 is not inserted into the hair dryer 20 and is located outside the hair dryer 20. The manner of movement of the hair dryer 20 relative to the backpack assembly 10 of the third embodiment is: through the elastic deformation of the elastic member 73 to realize that the hair dryer 20 can swing relative to the backpack body 3; It is hinged to realize that the hair dryer 20 can swing relative to the backpack 3 in the second direction b, and through the cooperation between the second rod body section 75 and the backpack 3, the hair dryer 20 can swing relative to the backpack 3 in the first direction a.

6 and 7, the connecting device 8 in the fourth embodiment includes a connecting rod 81, a joint component 82 arranged on one end of the connecting rod 81, and a joint assembly 82 arranged on the other end of the connecting rod 81 and mated with the hair dryer 20 The mating part 83, the mating part 83 arranged on the connecting rod 81 and mating with the hair dryer 20, and the backpack mating part (not numbered) mated with the backpack 3. The structure of the mating portion 83 in the fourth embodiment is the same as the structure of the mating portion in the first embodiment. A joint assembly 82 that realizes the swinging of the connecting rod 81 relative to the backpack 3 is provided between the backpack docking portion and the backpack 3, and the joint assembly 82 is inserted into the backpack 3 to rotate the connecting rod 81 relative to the backpack 3 through the joint assembly 82. Specifically: the backpack 3 is provided with a cylindrical hole 31, and the joint assembly 82 includes a cylindrical body (not numbered) for inserting into the cylindrical hole 31, and a movable end (not shown) movably connected to the cylindrical body. The end is set on the connecting rod 81, the movable end can rotate relative to the cylinder in the second direction b, the cylindrical hole 31 and the cylinder are in clearance fit, and the cylinder can be opposed to the inner wall of the cylindrical hole 31 in the cylindrical hole 31 swing. The cylinder can rotate in the cylindrical hole 31 around the first direction a. The connecting rod 81 is L-shaped, and the cylindrical hole 31 is located on the right side of the backpack 3. The elastic structure 84 is located between the cylindrical hole 31 and the cylindrical body. The elastic structure 84 is a torsion spring 84. The hair dryer can overcome the torsion spring 84 to swing in the first direction a. In addition, the torsion spring 84 can also provide torque to overcome gravity. Assist the support of the hair dryer 20. The manner of movement of the hair dryer 20 relative to the backpack assembly 10 of the fourth embodiment is as follows: through the cooperation between the movable end of the connecting rod 81 and the cylindrical body, the hair dryer 20 can swing in the left-right direction relative to the backpack body 3, passing through the cylindrical body and the cylindrical hole. The cooperation can realize the vertical swing of the hair dryer 20 relative to the carrying body 3, and can also overcome the restriction of the torsion spring 84 to realize the swing in the first direction to provide torque and overcome gravity.

Referring to Figures 8 to 12, the connecting rod 51' in the fifth embodiment includes a connecting section 54' connected with the elastic member 53' and a plug-in section 55' extending horizontally outward from the connecting section 54'. The portion 83' is located at an end of the elastic member 53' away from the connecting section 54', and the connecting portion 83' will be described in detail later. In this embodiment, the elastic member 53' also adopts a spring, which is arranged coaxially with the connecting section 54'. The connecting section 54' is a columnar structure with an elliptical cross section, and a cylindrical cavity (not labeled) is formed in the elastic member 53'; the connecting section 54' is inserted into the circular cavity, and the connecting section 54' has the longest The contact portion 541' on the diameter and the free portion 542' located on the shortest diameter (that is, the connecting portion 54' resembles an elliptical cylinder), the contact portion 541' and the inner wall of the cylindrical cavity are in interference fit, free There is a movable gap between the portion 542 ′ and the inner wall of the cylindrical cavity, and the plug-in section 55 ′ is inserted into the backpack 3. In order to facilitate the assembly of the connecting section 54' and the elastic member 53', an assembling cavity 57' is formed on the outer side of the connecting section 54', and the elastic member 53' is partially inserted into the assembling cavity 57'. The assembling cavity 57' is formed as follows: the connecting rod 51' further includes an assembling ring 56' formed on the outer side of the connecting section 54', and the assembling ring 56' and the connecting section 54' are enclosed to form an assembling cavity 57'. The backpack 3 is provided with an insertion slot 33 that is matched with the insertion section 55'. In this embodiment, in order to facilitate the assembly of the elastic member 53' and the mating portion 83', a mating groove 831' is recessed on the side of the mating portion 83' facing the elastic member 53', and a portion of the elastic member 53' Insert into the mating groove 831'. The movement of the hair dryer 20 relative to the back body 3 in the sixth embodiment is as follows: the hair dryer 20 can swing relative to the back body 3 through the elastic member 53', and the hair dryer 20 is realized by the cooperation of the elastic member 53' and the cylindrical cavity. It can swing in a certain direction relative to the carrying body 3. In detail, since the elastic member 53' is a cylindrical cavity, and the connecting section 54' inserted into it is similar to an elliptical cylinder, the elastic member 53' can be The relative connecting section 54' swings along the shortest diameter direction of the connecting section 54'.

Please refer to FIG. 13, in the sixth embodiment, a sliding device is added on the basis of the first embodiment to the fifth embodiment so that the connecting device 9 can slide relative to the backpack 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 backpack body 3 is provided with a height direction along the backpack assembly 10 (the direction indicated by the arrow z in FIG. 8). ) An extended lifting rail 31, the connecting device is installed on the lifting rail 31 through a sliding member and can move along the longitudinal direction of the lifting rail 31 on the lifting rail 31.

In this 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 carrying body 3 so that the weight of the built-in battery pack can be effectively decomposed to the body. The carrying body 3 is connected to the blower 20 through the connecting device 5, so that the blower 20 and the carrying body 3 are conveniently docked, which helps to improve the man-machine operation.

In addition, the present invention also provides a blowing device as shown in FIG. 14, which carries the assembly 10 and the blower 20 on its back. The backpack assembly 10 may be any of the above-mentioned, but it is not limited to this, and may also have other structures. The hair dryer includes a main body casing 211, an elastic tube 212, an air tube 213, a motor, and a fan; the main body casing 211, the elastic tube 212, and the air tube 213 are connected in sequence to form an air flow channel, and the motor is located in the main body casing 211, The fan is driven to form an air flow that flows through the host casing 211, the elastic tube 212, and the air tube 213. The air tube 213 can swing at multiple angles relative to the backpack through the elastic tube 212, and the elastic tube 212 can be a bellows.

The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, All should be considered as the scope of this specification.

The above-mentioned embodiments only express several embodiments of the present invention, and the descriptions are relatively specific and detailed, but they should not be understood as limiting the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

A blowing device, comprising a backpack assembly and a hair dryer, characterized in that the backpack assembly includes a backpack body, a backpack set on the backpack body and used for wearing or binding, set on the backpack body for all A power supply system provided by the hair dryer and a connection device connecting the backpack and the hair dryer, the connection device comprising an elastic structure, and the hair dryer can swing at multiple angles relative to the backpack through the elastic structure;

The connecting device further includes a connecting rod located between the backpack and the hair dryer, a mating portion provided on the connecting rod and mated with the hair dryer, and a backpack docking part that is butted with the backpack At least one end of the elastic structure is connected to the connecting rod, and at least part of the axis of the elastic structure coincides with or is arranged in parallel with at least part of the axis of the connecting rod;

The connecting rod includes a connecting section connected with an elastic structure, the connecting section is a columnar structure with an elliptical cross section, and a cylindrical cavity is formed in the elastic structure; the connecting section is inserted into the circular hollow In the cavity, the connecting section has a contact portion located on the longest diameter and a free portion located on the shortest diameter. There is an interference fit between the contact portion and the inner wall of the cylindrical cavity, and the free portion is in an interference fit with the inner wall of the cylindrical cavity. There is a movable gap between the inner walls of the cylindrical cavity.
The blowing device of claim 1, wherein the elastic structure is a spring.
The blowing device of claim 1, wherein the connecting rod includes at least a second rod body section connected to the backpack body, and a first rod body section rotatably connected to the second rod body section and arranged at an angle, The first rod body section extends in the front-to-back direction of the backpack, and the end of the elastic structure is connected to the end of the first rod body section away from the second rod body section and then is connected to the connecting part through the connecting part. The hair dryer is connected, and the axis of the elastic structure is parallel to or coincides with the axis of the first connecting rod;

Alternatively, the connecting rod includes at least one rod segment extending in the front-to-back direction of the backpack and connected to the backpack, and the end of the elastic structure is connected to the end of the connecting rod away from the backpack. The connecting portion is connected to the hair dryer, and the axis of the elastic structure is parallel to or coincides with the axis of the rod body section.
The hair dryer according to claim 1, wherein the hair dryer is provided with a receiving groove, the elastic structure is connected to the hair dryer through a fitting portion, and at least part of the elastic structure is accommodated in the receiving groove A gap is provided between the groove wall of the receiving groove and the outer surface of the elastic structure.
8. The blowing device according to claim 1, wherein the back-to-back connecting portion and the back-to-back body are assembled through a universal joint structure and/or a sliding rail structure to achieve connection.
5. The blowing device according to any one of claims 1 to 5, wherein the backpack assembly further comprises a protrusion extending outward from the backpack, and the connecting rod is connected to the protrusion.
The hair dryer according to claim 6, wherein the hair dryer is further provided with an electrical interface, and the backpack assembly is provided with an electrical interface for docking with the electrical interface to connect the power supply system and the motor. The sex interface is arranged on the mating part, so as to realize the installation of the electrical interface and the electrical interface synchronously through the installation of the mating part.
A blowing device, comprising a backpack assembly and a hair dryer, characterized in that the backpack assembly includes a backpack body, a backpack set on the backpack body and used for wearing or binding, set on the backpack body for all A power supply system provided by the hair dryer and a connection device connecting the backpack and the hair dryer, the connection device comprising an elastic structure, and the hair dryer can swing at multiple angles relative to the backpack through the elastic structure;

The connecting device further includes a connecting rod located between the backpack and the hair dryer, a mating part arranged on the connecting rod and mated with the hair dryer, and a backpack docking part that is butted with the backpack, so The elastic structure is arranged between the backpack docking portion and the backpack body; a joint assembly that realizes the swinging of the connecting rod relative to the backpack body is arranged between the backpack docking portion and the backpack body, and the elastic structure is arranged at The torsion spring between the joint assembly and the back body, the hair dryer can swing relative to the back body through the torsion spring.
8. The blowing device according to claim 8, wherein the backpack assembly further comprises a protrusion extending outward from the backpack, and the connecting rod is connected to the protrusion.
The hair dryer according to claim 9, wherein the hair dryer is further provided with an electrical interface, and the backpack assembly is provided with an electrical interface for connecting with the electrical interface to connect the power supply system and the motor. The sex interface is arranged on the mating part, so as to realize the installation of the electrical interface and the electrical interface synchronously through the installation of the mating part.
A DC electric tool includes a backpack assembly and a tool body, wherein the backpack assembly includes a backpack body, a backpack belt arranged on the backpack body and used for wearing or binding, and is arranged on the backpack body A power supply system for providing power to the tool body, and a connecting device that connects the backpack body and the tool body, the connecting device includes an elastic structure through which the tool body has multiple angles relative to the backpack body swing.
A blowing device, comprising a backpack assembly and a hair dryer, characterized in that the backpack assembly includes a backpack body, a backpack set on the backpack body and used for wearing or binding, set on the backpack body for all The power supply system provided by the hair dryer and the connection device connecting the backpack and the hair dryer,

The hair dryer includes:

The host casing, the elastic tube, and the air tube are connected in sequence, and the air tube can swing at multiple angles relative to the backpack through the elastic tube;

And a motor located in the host casing;

The fan is driven by the motor, and the airflow generated by the fan driven by the motor flows through the mainframe casing, the elastic tube, and the air duct.