Cavity device in handheld blowing tool

Abstract

The utility model relates to a cavity device in a handheld blowing tool, which comprises a shell, an air outlet cavity and an air inlet cavity, the air outlet cavity and the air inlet cavity are respectively positioned at two axial ends of the shell and are limited and fixed, and an air guide cavity is mounted between one end of the air outlet cavity and one end of the air inlet cavity. The air guide cavity is located in the shell and is limited and fixed, and air enters the air guide cavity from the air inlet cavity and is blown out of the air outlet cavity along the air guide cavity; the air blowing tool has the advantages that compared with the prior art, the air guiding cavity is installed between the air outlet cavity and the air inlet cavity, and the air outlet cavity, the air inlet cavity and the air guiding cavity are all installed in the shell in the axial direction, so that in the working process of the air blowing tool, it can be guaranteed that air is not lost, and efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of hair dryer technology, and in particular relates to a cavity device inside a handheld hair dryer. Background Technology

[0002] There are many hair dryers on the market, mainly including dust collectors, deodorizers, and fragrance diffusers. These hair dryers should all have a cavity device for air circulation. However, existing hair dryers are all assembled and fixed with two semi-circular cross-section shells. During the air intake and blowing process, the air must pass through the cavity device. Since there are gaps at the assembly of the cavity device, some air will be lost during operation. As a result, the air blowing volume will be slightly reduced when the air intake volume is the same, which will reduce the efficiency of the hair dryer. To ensure the air blowing volume, the air intake volume must be increased, which requires increasing the motor power and increases the production cost. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a cavity device inside a handheld hair dryer that can ensure that air is not lost and improve efficiency.

[0004] The purpose of this utility model is achieved through the following technical solution: the cavity device inside this handheld hair dryer includes a shell, an air outlet cavity, and an air inlet cavity. The air outlet cavity and the air inlet cavity are respectively located at both ends of the axial direction of the shell and are fixed in place. An air guide cavity is installed between one end of the air outlet cavity and one end of the air inlet cavity. The air guide cavity is located inside the shell and is fixed in place. Air enters from the air inlet cavity into the air guide cavity and is blown out from the air outlet cavity along the air guide cavity.

[0005] The beneficial effects of this utility model are as follows: Compared with the prior art, by installing an air guide cavity between the air outlet cavity and the air inlet cavity, and with the air outlet cavity, air inlet cavity and air guide cavity all installed axially inside the housing, air can be ensured not to be lost during the operation of the blower, thus improving efficiency.

[0006] Preferably, the air guide cavity is a cone-shaped cylindrical structure, with the small cone end of the air guide cavity connected to one end of the air outlet cavity, and the large cone end of the air guide cavity connected to one end of the air inlet cavity. By designing the air guide cavity as a cone-shaped cylindrical structure, the airflow from inlet to outlet is smoother, the concentration of the outlet air is better, and the outlet air efficiency is higher.

[0007] Preferably, the end face of the small conical end of the air guide cavity is provided with a ring of locking protrusions, and the locking protrusions are arranged along the axial direction of the air guide cavity. The air guide cavity is installed on the inner wall of one end of the air outlet cavity by the locking protrusions, so that the air guide cavity is installed and fixed on the air outlet cavity. By providing the locking protrusions, the installation between the air guide cavity and the air outlet cavity is more convenient, and the stability after installation is also better.

[0008] Preferably, the snap-fit ​​protrusion is provided with a limiting hole, and the inner circumferential wall of the air outlet cavity, which is adapted to the limiting hole, is provided with a limiting protrusion. When the air guide cavity and the air outlet cavity are installed together, the limiting protrusion is inserted into the limiting hole for limiting. By setting the limiting protrusion and the limiting hole and the insertion limiting between them, the circumferential rotation of the air guide cavity and the air outlet cavity after installation is prevented, and the stability is further improved.

[0009] Preferably, the cavity wall at the small conical end of the air guide cavity is provided with a wire hole, which communicates with the limiting hole and both are distributed along the axial direction of the air guide cavity; since a motor and wiring are installed at the air inlet cavity, by providing the wire hole, the wire harness can be connected to the circuit board on the blower through the wire hole.

[0010] Preferably, the inner circumferential wall of the large conical end of the air guide cavity is provided with an embedding groove, which is used to install the air guide cavity on the outer wall of one end of the air inlet cavity, so that the air guide cavity is installed and fixed on the air inlet cavity. By providing the embedding groove, the installation between the air guide cavity and the air inlet cavity is more convenient, and the stability after installation is also better.

[0011] Preferably, a support platform is provided on one side of the outer peripheral wall of the air guide cavity. The support platform corresponds to the mounting groove opened at the upper end of the housing. An indicator plate is installed on the mounting groove, and the lower end of the indicator plate abuts against the support platform. By setting the support platform, it is easier to install the indicator plate on the housing, and it is well positioned and installed with the support platform on the air guide cavity, which greatly improves the stability after installation.

[0012] Preferably, the inner wall of the housing is provided with several rings of limiting and supporting strips, which are respectively distributed on the outer peripheral wall side of the air outlet cavity, the air inlet cavity and the air guide cavity; through the above structure, the air outlet cavity, the air inlet cavity and the air guide cavity can be well limited between themselves and the inner wall of the housing after installation, and the installation stability is better. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the hair dryer of this utility model.

[0014] Figure 2This is a schematic diagram of the exploded structure of the blower tool of this utility model. Figure 1 .

[0015] Figure 3 This is a schematic diagram of the exploded structure of the blower tool of this utility model. Figure 2 .

[0016] Figure 4 This is a schematic diagram of the air guide cavity structure of this utility model.

[0017] The labels in the attached diagram are as follows: 1. Housing; 2. Air outlet cavity; 3. Air inlet cavity; 4. Air guide cavity; 5. Indicator plate; 11. Mounting groove; 12. Limiting support strip; 41. Small cone end; 42. Large cone end; 43. Snap-fit ​​protrusion; 44. Limiting hole; 45. Limiting protrusion; 46. Threading hole; 47. Embedded groove; 48. Support platform. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings: as shown in the drawings Figures 1 to 4 As shown, this utility model includes a housing 1, an air outlet chamber 2, and an air inlet chamber 3. The air outlet chamber 2 and the air inlet chamber 3 are located at opposite axial ends of the housing 1 and are fixed in place. A guide chamber 4 is installed between one end of the air outlet chamber 2 and one end of the air inlet chamber 3. The guide chamber 4 is located inside the housing 1 and is fixed in place. Air enters from the air inlet chamber 3 into the guide chamber 4 and is blown out from the air outlet chamber 2 along the guide chamber 4. The housing 1 is divided into two halves, and the overall housing is fixed by tightening screws.

[0019] The air guide cavity 4 is a cone-shaped cylindrical structure, and the small cone end 41 of the air guide cavity 4 is installed and connected to one end of the air outlet cavity 2, and the large cone end 42 of the air guide cavity 4 is installed and connected to one end of the air inlet cavity 3.

[0020] The end face of the small cone end 41 of the air guide cavity 4 is provided with a ring of locking protrusions 43, and the locking protrusions 43 are arranged along the axial direction of the air guide cavity 4. The air guide cavity 4 is installed on the inner wall of one end of the air outlet cavity 2 by the locking protrusions 43, so that the air guide cavity 4 is installed and fixed on the air outlet cavity 2.

[0021] The snap-fit ​​protrusion 43 is provided with a limiting hole 44, and the inner circumferential wall of the air outlet cavity 2, which is adapted to the limiting hole 44, is provided with a limiting protrusion 45. When the air guide cavity 4 and the air outlet cavity 2 are installed together, the limiting protrusion 45 is inserted into the limiting hole 44 for limiting.

[0022] The small conical end 41 of the air guide cavity 4 has a wire hole 46 on its cavity wall. The wire hole 46 communicates with the limiting hole 44, and both are distributed along the axial direction of the air guide cavity 4.

[0023] The inner circumferential wall of the large conical end 42 of the air guide cavity 4 is provided with an embedded groove 47. The air guide cavity 4 is installed on the outer wall of one end of the air inlet cavity 3 through the embedded groove 47, so that the air guide cavity 4 is installed and fixed on the air inlet cavity 3.

[0024] A support platform 48 is provided on one side of the outer peripheral wall of the air guide cavity 4. The support platform 48 corresponds to the mounting groove 11 opened at the upper end of the housing 1. An indicator plate 5 is installed on the mounting groove 11, and the lower end of the indicator plate 5 abuts against the support platform 48.

[0025] The inner wall of the housing 1 is provided with several rings of limiting and supporting strips 12, which are distributed on the outer peripheral wall side of the air outlet cavity 2, the air inlet cavity 3 and the air guide cavity 4 respectively.

[0026] The installation and working principle of this utility model are as follows: First, the air outlet cavity 2, the air inlet cavity 3, and the air guide cavity 4 are installed together; then, the installed cavity device is installed into the housing 1; finally, through the operation of the blower, air enters from the air inlet cavity 3 into the air guide cavity 4 and is blown out from the air outlet cavity 2 along the air guide cavity 4.

[0027] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A cavity arrangement in a hand-held blowing tool, comprising a housing (1), an air outlet cavity (2) and an air inlet cavity (3), characterized in that: The air outlet cavity (2) and the air inlet cavity (3) are located at the axial two ends of the shell (1) and are fixed in position, and a wind guide cavity (4) is installed between one end of the air outlet cavity (2) and one end of the air inlet cavity (3), the wind guide cavity (4) is located in the shell (1) and is fixed in position, and air enters the wind guide cavity (4) from the air inlet cavity (3) and is blown out from the air outlet cavity (2) along the wind guide cavity (4).

2. A cavity arrangement within a hand-held blowing tool according to claim 1, characterized in that: The wind guide cavity (4) is a conical cylinder structure, and the small conical end (41) of the wind guide cavity (4) is connected with one end of the air outlet cavity (2), and the large conical end (42) of the wind guide cavity (4) is connected with one end of the air inlet cavity (3).

3. A cavity arrangement within a hand-held blowing tool according to claim 2, characterized in that: The end face of the small conical end (41) of the wind guide cavity (4) is provided with a clamping protrusion (43), and the clamping protrusion (43) is arranged along the axial direction of the wind guide cavity (4), and the clamping protrusion (43) is embedded and installed in the inner wall of one end of the air outlet cavity (2), so that the wind guide cavity (4) is fixed on the air outlet cavity (2).

4. The cavity arrangement within a hand-held blowing tool according to claim 3, characterized in that: The clamping protrusion (43) is provided with a limiting hole (44), and the inner circumferential wall of the air outlet cavity (2) is provided with a limiting protrusion (45) matched with the limiting hole (44), and when the wind guide cavity (4) is installed with the air outlet cavity (2), the limiting protrusion (45) is inserted and limited with the limiting hole (44).

5. A cavity arrangement within a hand-held blowing tool according to claim 4, characterized in that: The cavity wall of the small conical end (41) of the wind guide cavity (4) is provided with a threading hole (46), the threading hole (46) is communicated with the limiting hole (44), and both of them are distributed along the axial direction of the wind guide cavity (4).

6. The cavity arrangement within a hand-held blowing tool according to claim 2, characterized in that: The end face inner circumferential wall of the large conical end (42) of the wind guide cavity (4) is provided with a clamping groove (47), which is installed on the outer wall of one end of the air inlet cavity (3), so that the wind guide cavity (4) is fixed on the air inlet cavity (3).

7. The cavity arrangement within a hand-held blowing tool according to claim 1, characterized in that: One side of the outer circumferential wall of the wind guide cavity (4) is provided with a bearing platform (48), the bearing platform (48) corresponds to the installation groove (11) opened on the upper end of the shell (1), the installation groove (11) is provided with an indicating plate (5), and the lower end of the indicating plate (5) abuts against the bearing platform (48).

8. The cavity arrangement within a hand-held blowing tool according to claim 1, characterized in that: The inner wall of the shell (1) is provided with a plurality of limiting resting strips (12), which are respectively distributed on the outer circumferential wall side of the air outlet cavity (2), the air inlet cavity (3) and the wind guide cavity (4).

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