Air speed balance structure

Abstract

Disclosed in the present utility model is an air speed balance structure, comprising a bendable electric hair drier, a fan being provided in the electric hair drier, and a protruding part extending into an air duct being provided at a bending position. Air speed is adjusted by changing the relative position of the protruding part and the axis of the fan. In a straight state, the protruding part is close to the axis of the fan, and the protruding part blocks a relatively large area of the fan so as to achieve a reverse flow blocking effect. It can be understood that an output airflow moves transversely and, in this state, when passing through the protruding part, part of the airflow will hit against the protruding part and rebound, thus achieving a relatively low flow rate in the straight state. In a bent state, the protruding part is located on the inner side of the bending position and is away from the axis of the fan and, at this moment, the protruding part less blocks the fan, and the airflow can smoothly enter a flow channel. While the service state of the electric hair drier is changed, the degree of the protruding part blocking the airflow is also changed, such that the output flow rates in the straight state and the bent state are close to each other or form a flow rate difference, thereby meeting different flow rate requirements.

Description

A wind speed balancing structure Technical Field

[0001] The utility model belongs to the technical field of hairdressing equipment, in particular to a wind speed balancing structure. Background Art

[0002] Bendable hair dryers usually have two usage modes, one is straight and the other is bent. Users can choose the mode according to different needs. For example, the published patent document CN211459143U describes a portable rotatable hair dryer that can be switched between bent and straight modes. However, the shapes of the air ducts in the straight and bent states are different. Under the same environment, the wind speed in a straight channel will definitely be faster than in a curved channel. However, when this is applied to consumer products, different wind speeds in different states will lead to poor consumer experience and imperfect products. Utility Model Content

[0003] The purpose of the present invention is to provide a wind speed balancing structure to solve the problems raised in the above background technology.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A wind speed balancing structure includes a bendable hair dryer with a fan inside. A protrusion extending into the air duct is provided at the bend. The wind speed is adjusted by changing the relative position of the protrusion and the fan axis.

[0006] According to a further technical solution, the air duct is "S"-shaped in the straight state and "L"-shaped in the bent state.

[0007] According to a further technical solution, when the hair dryer is in a straight state, the raised portion is close to the axis of the blower.

[0008] According to a further technical solution, in the bent state, the raised portion is located inside the bend and away from the axis of the fan.

[0009] According to a further technical solution, the hair dryer body comprises a main body 1 and a main body 2 which are rotatably connected, the main body 1 is provided with two locking positions, the main body 2 is provided with a locking part, and the locking part is used in conjunction with the two locking positions respectively.

[0010] According to a further technical solution, the hair dryer is detachably connected to a nozzle, and a plurality of protrusions are arranged on the surface of the nozzle.

[0011] A further technical solution is that a positioning and rotating structure is provided between the main body one and the main body two, and the positioning and rotating structure includes a fixing ring installed at the two ends of the main body, and a plurality of continuous positioning grooves are provided on the outer circumference of the fixing ring, and a plurality of positioning grooves are engaged with positioning balls, and the positioning balls are movably arranged in the main body one, and a reset spring is provided in the main body one, and the reset spring is against the positioning ball.

[0012] According to a further technical solution, in the bent state, the axis of the fan is perpendicular to the axis of the air outlet of the hair dryer.

[0013] According to a further technical solution, the fan is arranged inside the second body and close to the first body.

[0014] According to a further technical solution, the inner diameter of the fan inlet passage where the main body 2 is located is larger than the inner diameter of the fan outlet passage.

[0015] Beneficial effects of the utility model:

[0016] When in the straight state, the raised portion is close to the axis of the fan. At this time, the raised portion has a large area of ​​obstruction on the fan and plays a reverse flow blocking role. It can be understood that the output airflow is a horizontal movement. In this state, part of the airflow will be hit and rebounded when passing through the raised portion, which will make the flow rate in the straight state relatively slow; when in the bent state, the raised portion is located on the inner side of the bend, away from the axis of the fan. At this time, the raised portion has less obstruction to the fan, and the airflow can smoothly enter the flow channel. While changing the use state of the hair dryer, the degree of obstruction of the airflow by the raised portion 21 is also changed, so that the output flow rate in the straight state and the bent state is close or forms a flow rate difference, thereby improving the user experience and meeting different flow rate requirements.

[0017] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1: A partial cross-sectional diagram of the straight-tube state of the present invention.

[0019] Figure 2: Schematic diagram of airflow in the straight-tube state of Figure 1 of the present invention.

[0020] Figure 3: A partial cross-sectional diagram of the present invention in a bent state.

[0021] FIG4 is a schematic diagram of airflow in the bent state of FIG3 of the present invention.

[0022] Figure 5: Schematic diagram of the external structure of the present invention.

[0023] Figure 6: Positioning and rotation structure diagram of the utility model.

[0024] Figure numerals: 1-hair dryer, 11-body one, 12-body two, 13-fixing ring, 14-positioning groove, 15-positioning ball, 16-spring, 21-raised portion, 22-air guide surface, 31-locking position, 32-locking portion, 41-nozzle, 42-bump, 5-blower. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0026] Please refer to Figure 1-6;

[0027] The wind speed balancing structure of the present invention can be applied to a transformable air duct, so that air ducts in different shapes can output airflows with nearly the same or different flow rates, thereby improving the user experience. Specifically, it includes a bendable hair dryer 1. Taking the prior art as an example, the hair dryer 1 can be transformed into a straight barrel and a bent barrel, and the shape of the air duct inside it will also change accordingly. In order to make the output airflow flow rate consistent or different, a protrusion 21 extending into the air duct is provided at the bend.

[0028] When in the straight state, the raised portion 21 is close to the axis of the fan 5. At this time, the raised portion 21 has a large area of ​​obstruction on the fan 5 and plays a reverse flow blocking role. It can be understood that the output airflow is a horizontal movement. In this state, part of the airflow will be impacted and rebounded when passing through the raised portion 21, which will make the flow speed in the straight state relatively slow. Of course, an air guide surface 22 can be set at the raised portion 21. In this state, the air guide surface 22 is vertical or reversely inclined to play a flow blocking role; when in the bent state, the raised portion 21 is located on the inner side of the bend, away from the axis of the fan 5. At this time, the raised portion 21 has less obstruction to the fan 5. At this time, the airflow can smoothly enter the flow channel. Of course, the air guide surface 22 is in the same direction as the output airflow, or is inclined in the same direction. It can be understood that the airflow is an arc movement, and the air guide surface 22 is extended along the arc flow direction. Although the airflow will be blocked and slowed down when passing through the bend in the bent state, when flowing through the raised portion 21, it is not blocked by the air guide surface 22 and can pass smoothly. While changing the use state of the hair dryer 1, the degree of obstruction of the raised portion 21 to the airflow is also changed, so that the output flow rate in the straight state and the bent state is close to or forms a flow rate difference, thereby improving the user experience and meeting different flow rate requirements.

[0029] In addition, the provision of the wind guide surface 22 allows the airflow to pass through more smoothly with less noise.

[0030] In this embodiment, the air duct is "S"-shaped in the straight state and "L"-shaped in the bent state. In the straight state, the airflow needs to pass through two bends, while in the bent state, the airflow only needs to pass through one bend. By setting air ducts of different shapes to change the wind speed, the airflow output flow rates in the straight state and the bent state can be consistent or have a specific flow rate difference.

[0031] In this embodiment, the hair dryer 1 can be rotated and folded so that the air duct forms an "L" shape or an "S" shape. In the two different states, the position of the protrusion 21 can be switched up and down accordingly. In the bent state, the protrusion 21 is located on the inner side of the bend. In the bent state, the axis of the fan 5 is perpendicular to the axis of the air outlet of the hair dryer 2.

[0032] In the embodiment of the present utility model, the main body of the hair dryer 1 includes a main body 11 and a main body 12 that are rotatably connected. Two locking positions 31 are provided on the main body 11, and the two locking positions 31 correspond to the straight barrel state and the bent state respectively. A locking portion 32 is provided on the main body 12, and the locking portion 32 is used in conjunction with the two locking positions 31 respectively. The relative positions of the main body 11 and the main body 12 can be fixed by the locking portion 32, which is convenient for people to use.

[0033] In this embodiment, a positioning and rotating structure is provided between the main body 11 and the main body 2 12, so that the user can accurately find the position when rotating the main body 11 and the main body 2 12. Specifically, it includes a fixing ring 13 installed at the end of the main body 2 12, and a plurality of continuous positioning grooves 14 are provided on the outer periphery of the fixing ring 13. A positioning ball 15 is engaged with the plurality of positioning grooves 14. The positioning ball 15 is movably arranged in the main body 11, and a return spring 16 is provided in the main body 11, and the return spring 16 is against the positioning ball 15; when the main body 11 and the main body 2 rotate relative to each other, the positioning ball 15 will be pressed into the main body 11 when crossing two adjacent positioning grooves 14. After the crossing is completed, the positioning groove 14 corresponds to the positioning ball 15. At this time, the spring 16 applies a thrust to the positioning ball 15 to push the positioning ball 15 out, so that the positioning ball 15 is engaged with the positioning groove 14. A certain tactile feeling will be generated during the engagement of the positioning ball 15 with the positioning groove 14, so that the user knows the angle of rotation.

[0034] In this embodiment, the fan 5 is disposed in the second body 12 and close to the first body 11, that is, the fan 5 is disposed close to the air outlet position of the second body 12, which can reduce the residence time of the airflow in the second body 12 and reduce the loss of kinetic energy;

[0035] In addition, the inner diameter of the air inlet passage of the fan 5 where the main body 2 12 is located is larger than the inner diameter of the air outlet passage of the fan 5. Under the condition of the same air intake volume, reducing the inner diameter of the air outlet end can accelerate the air flow to be ejected, thereby increasing the gas flow rate.

[0036] In the embodiment of the present invention, the hair dryer 1 is detachably connected to a nozzle 41. Usually, the hair dryer 1 will generate a relatively hot airflow, which is then blown out from the nozzle 41. This will make the nozzle 41 very hot and easily burn the user. For this reason, a number of protrusions 42 are arranged on the surface of the nozzle 41. When the user touches the nozzle 41, the protrusions 42 will first be touched. The contact area of ​​the protrusions 42 is small, and there is a small gap between the protrusions 42 to facilitate heat dissipation, so the user will not feel very hot when touching the protrusions 42.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0038] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

1. A wind speed balancing structure, comprising a bendable hair dryer (1), wherein a fan (5) is provided inside the hair dryer (1), characterized in that: A protrusion (21) extending into the air duct is provided at the bend, and the wind speed is adjusted by changing the relative position of the protrusion (21) and the axis of the fan (5).

2. A wind speed balancing structure according to claim 1, characterized in that: The air duct is "S" shaped in the straight state and "L" shaped in the bent state.

3. A wind speed balancing structure according to claim 1 or 2, characterized in that: When the hair dryer (1) is in a straight state, the raised portion (21) is close to the axis of the blower (5).

4. A wind speed balancing structure according to claim 1 or 2, characterized in that: In the bent state, the protruding portion (21) is located on the inner side of the bend, away from the axis of the fan (5).

5. A wind speed balancing structure according to claim 1, characterized in that: The hair dryer (1) body comprises a main body (11) and a main body (12) which are rotatably connected, the main body (11) is provided with two locking positions (31), the main body (12) is provided with a locking portion (32), and the locking portion (32) is used in conjunction with the two locking positions (31) respectively.

6. A wind speed balancing structure according to claim 1, characterized in that: The hair dryer (1) is detachably connected to a nozzle (41), and a plurality of protrusions (42) are arranged on the surface of the nozzle (41).

7. A wind speed balancing structure according to claim 5, characterized in that: A positioning and rotating structure is provided between the main body one (11) and the main body two (12), and the positioning and rotating structure comprises a fixing ring (13) installed at the end of the main body two (12), a plurality of continuous positioning grooves (14) are provided on the outer periphery of the fixing ring (13), and a plurality of positioning grooves (14) are engaged with positioning balls (15), and the positioning balls (15) are movably arranged in the main body one (11), and a return spring (16) is provided in the main body one (11), and the return spring (16) abuts against the positioning balls (15).

8. A wind speed balancing structure according to claim 4, characterized in that: In the bent state, the axis center line of the fan (5) is perpendicular to the axis center line of the air outlet of the hair dryer (2).

9. A wind speed balancing structure according to claim 5, characterized in that: The fan (5) is arranged inside the second body (12) and is close to the first body (11).

10. A wind speed balancing structure according to claim 5, characterized in that: The inner diameter of the air inlet passage of the fan (5) where the second body (12) is located is greater than the inner diameter of the air outlet passage of the fan (5).

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