A hair dryer

Abstract

The application relates to a hair dryer; the technical scheme comprises a shell, a duct which is at least partially accommodated in the shell, a motor which is connected to the duct and has an output shaft, a fan blade which is connected to the output shaft and located in the duct, a controller which is connected to the motor to control the rotation of the motor, a trigger which is pivoted to the shell, a switch which is at least partially accommodated in the shell and triggered by the trigger, a knob which is rotationally connected to the shell and triggers the switch, and a limiting mechanism which limits and keeps the position of the knob, so that the hand fatigue of a user is significantly reduced.

Description

Technical Field

[0001] This application relates to the field of power tool technology, and in particular to hair dryers. Background Technology

[0002] A hair dryer is a device that uses energy to drive a motor to rotate, which in turn drives the fan blades on the motor shaft to blow air out. With the widespread use of hair dryers, they have gradually been applied to other aspects of the home, such as blowing away dust, sweeping snow, and blowing away fallen leaves, thus giving rise to a variety of hair dryers.

[0003] In related technologies, Chinese patent CN2644859Y discloses a blower / vacuum fan designed to improve the safety performance of existing blower / vacuum fans. The blower / vacuum fan with a safety protection device includes a main body with an air inlet, a fan, a blower pipe, a suction pipe, a dust collection bag, and a switch. A micro switch is installed on one side of the air inlet, and a push rod is installed below the micro switch. An auxiliary handle with a cam is installed on the main body below the push rod. The auxiliary handle is fixed to the main body by a pin and can rotate around the pin. When it is engaged with the air inlet, the cam pushes the push rod to trigger the micro switch. Its advantage lies in adding a safety protection mechanism to existing blower / vacuum fans, preventing hands or other body parts from touching the fan during use, thus protecting hands and other parts from injury and improving operational safety.

[0004] However, current hair dryers require continuous manual pressing of the switch to operate, which can easily cause hand strain for operators and therefore needs to be improved. Summary of the Invention

[0005] Therefore, it is necessary to provide a hair dryer that addresses the problem of wear and tear caused by prolonged use.

[0006] To solve the above-mentioned technical problems, this application is implemented as follows: In one embodiment, a hair dryer is provided, comprising: shell; The duct is at least partially housed within the outer casing; An electric motor is connected in the duct and has an output shaft; Fan blades are connected to the output shaft and located within the duct. A controller is connected to the motor to control the rotation of the motor; Trigger, pivoting on the housing; A switch, at least partially housed within the housing and triggered by the trigger; A knob, which is connected to the housing and triggers the switch when rotated; A limiting mechanism restricts and maintains the position of the knob.

[0007] In some or other preferred embodiments, the limiting mechanism includes a stop hole, a ball, and an elastic element. The stop hole is located on one of the knob or the housing, and the ball and elastic element are located on the other. At least two stop holes are provided. The ball has a first position and a second position. When the ball is in the first position, the ball is at least partially located within the stop hole. When the ball is in the second position, the ball is completely disengaged from the stop hole. The elastic element abuts against the ball.

[0008] In some or other preferred embodiments, the trigger includes an operating part and a pressing part, the operating part and the pressing part being located at the ends of a pivot shaft, the pressing part being provided with an arcuate flange that abuts against the switch; the knob is provided with a pressing member that abuts against the pressing part, the knob is provided with a positioning member, the knob is provided with a mounting member, the mounting member is provided with a positioning part, and the positioning member and the positioning part are inserted into each other; the mounting member and the knob are respectively located on the side of the housing.

[0009] In some or other preferred embodiments, the knob is provided with a connecting part, the outer shell is provided with a through hole at the fixed position of the knob, the connecting part passes through the through hole, and the end of the connecting part is provided with a connector; the knob is also provided with a clamping member, the clamping member is sleeved on the connector, one side of the clamping member abuts against the knob, and the other side abuts against the outer shell.

[0010] In some or other preferred embodiments, the knob is provided with a release component for resetting the knob, and a reset member is provided inside the housing. When the knob is touched, the reset member has an elastic potential energy to reset the knob.

[0011] In some or other preferred embodiments, the release assembly includes a pushing part, the number of which corresponds one-to-one with the number of the gear shift holes. The pushing part has a first state and a second state. When the pushing part is in the first state, it is located in the gear shift hole and abuts against the ball, and the pushing part pushes the ball from the first position to the second position. When the pushing part is in the second state, it is at least partially removed from the gear shift hole, and the elastic element pushes the ball from the second position to the first position. The pushing part pushes the ball to the second position where the knob can rotate.

[0012] In some or other preferred embodiments, the release assembly further includes a retainer disposed on the knob, the pusher being located on the retainer, the knob being rotatable relative to the axis of the retainer, and the retainer being slidably connected to the housing along the axial direction.

[0013] In some or other preferred embodiments, the release assembly further includes a force-applying element connected to the fixing member, the force-applying element being located outside the housing.

[0014] In some or other preferred embodiments, the force-applying component is provided with a connecting rod, the end of the connecting rod is provided with a latching block, the latching block is provided with a guide portion, the fixing component is provided with a fixing hole between the pushing portion, the connecting rod is fixed in cooperation with the fixing hole, the knob is provided with a relief portion to avoid the fixing component, when the fixing component is fixed to the force-applying component, the end wall of the force-applying component is in contact with the end wall of the fixing component or is provided with a first gap, and the end face of the connecting rod is located below the end face of the pushing portion.

[0015] In some or other preferred embodiments, the outer surface of the housing is provided with a receiving portion, and the knob is located in the receiving portion; the housing is provided with a limiting flange around the receiving portion, and the knob is provided with a locking portion around the periphery, the locking portion fitting against the limiting flange, the locking portion extending inward to a stop portion, the stop portion cooperating with the receiving portion; the knob is provided with an operating handle.

[0016] In this embodiment, the switch is triggered by a knob and the position of the knob is limited and maintained by a limiting mechanism, so that the motor can maintain the required speed, thereby eliminating the need for continuous operation by the operator and greatly reducing operator fatigue. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a hair dryer according to one embodiment of this application; Figure 2 This is a schematic cross-sectional view of the hair dryer along the center line in one embodiment of this application; Figure 3 This is an exploded view of the internal structure of a hair dryer according to one embodiment of this application; Figure 4 This is an exploded view of the structure of the hair dryer handle portion in one embodiment of this application; Figure 5 This is an exploded view of the structure of the hair dryer handle portion in one embodiment of this application from another perspective. Figure 6 This is a cross-sectional schematic diagram of the structure at the knob of the hair dryer in one embodiment of this application.

[0018] Figure Descriptions: 1. Housing; 11. Duct; 12. Motor; 13. Fan Blade; 14. Controller; 15. Switch; 16. Reset Part; 2. Trigger; 21. Operating Part; 22. Pressing Part; 221. Arc-shaped Flange; 3. Knob; 31. Mounting Part; 311. Pressing Part; 312. Positioning Part; 32. Positioning Part; 33. Connecting Part; 34. Connecting Part; 35. Clamping Part; 36. Locking Part; 361. Stopping Part; 37. Clearance Part; 38. Operating Handle; 4. Limiting Mechanism; 41. Gear Hole; 42. Ball; 43. Elastic Part; 5. Release Assembly; 51. Pushing Part; 52. Fixing Part; 521. Fixing Hole; 53. Force Applying Part; 531. Connecting Rod; 5311. Snap Block; 7. Receiving Part; 71. Limiting Flange. Detailed Implementation

[0019] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0020] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0025] See Figure 1 and Figure 2Figure 1 shows a schematic diagram of the overall structure of a hair dryer according to an embodiment of this application, and Figure 2 shows a schematic diagram of the cross-sectional structure of the hair dryer along the center line according to an embodiment of this application. The hair dryer provided in an embodiment of this application includes: a housing 1, a duct 11, a motor 12, a fan blade 13, a switch 15, a controller 14, a trigger 2, a knob 3, and a limiting mechanism 4. The housing 1 can be formed by fixing two half-shells together with screws. The housing 1 can have a handle portion, which can be roughly annular or arc-shaped, forming a through groove between the handle portion and the main body of the housing 1. This groove can be closed or open, as long as it is convenient for a person to insert a hand for gripping, moving, and operating. At least a portion of the duct 11 can be installed in the housing 1. The duct 11 can be a cylindrical tube open at both ends. The motor 12 can be connected in the duct 11 and equipped with an output shaft, which can be connected to the rotor. The fan blade 13 can be connected to the output shaft, which can extend into the duct 11. The fan blade 13 is also placed inside the duct 11, and the airflow generated by the fan blade 13 is gathered through the duct 11.

[0026] A controller 14 can be configured within the housing 1, and the controller 14 is equipped with various electronic components to control the rotation of the motor 12. A trigger 2 can be pivotally located near the handle portion of the housing 1 for easy finger operation. At least a portion of a switch 15 can be housed within the housing 1. When the trigger 2 is pivoted by finger operation, the trigger 2 can activate the trigger portion of the switch 15, thereby activating the switch 15. Preferably, the switch 15 can be a signal switch 15 or a linear switch 15, outputting different levels of signal depending on the depth of the trigger portion press, thereby controlling the rotational speed of the motor 12. A knob 3 is configured with the grip portion located on one side of the trigger 2 and near the operator's thumb. The knob 3 is rotatably connected to the housing 1, and rotation of the knob 3 can activate the switch 15. This activation can be independent or triggered by the trigger 2. A limiting mechanism 4 is connected to the knob 3 to limit and maintain the position of the knob 3, thereby reducing hand strain by eliminating the need for continuous pressing of the trigger 2.

[0027] See Figure 3 and Figure 4Figure 3 shows an exploded view of the internal structure of a hair dryer according to an embodiment of this application, and Figure 4 shows an exploded view of the structure of the handle portion of the hair dryer according to an embodiment of this application. In some or other preferred embodiments, the limiting mechanism 4 may include a stop hole 41, a ball bearing 42, and an elastic element 43. The stop hole 41 is located on either the knob 3 or the outer casing 1, and the ball bearing 42 and the elastic element 43 are located on the other. In this embodiment, the stop hole 41 is located on the outer casing 1 as an example for explanation. Specifically, at least two stop holes 41 are provided, and there may be three, four, or five, as needed. The ball bearing 42 and the elastic element 43 can be connected to the knob 3. The elastic element 43 abuts against the ball bearing 42, so that the ball bearing 42 has a first position and a second position. When the ball bearing 42 is in the first position, the ball bearing 42 is at least partially located in the gear position hole 41. At this time, under the positioning action of the ball bearing 42, the position of the knob 3 is maintained in the current position. When the ball bearing 42 is in the second position, the ball bearing 42 is completely disengaged from the gear position hole 41. At this time, the knob 3 can rotate freely to achieve position adjustment.

[0028] In some or other preferred embodiments, the trigger 2 may include an operating part 21 and a pressing part 22, which are respectively located at the ends of the pivot shaft. The operating part 21 may extend outside the housing 1 for easy manual operation. The pressing part 22 may be located inside the housing 1 and is used to activate the switch 15. The pressing part 22 may be provided with an arcuate flange 221 that abuts against the switch 15. The arcuate flange 221 may be a quarter circle. Since the trigger 2 pivots with the housing 1, the triggering part of the switch 15 needs to slide on the surface of the pressing part 22. The arcuate flange 221 can reduce friction and facilitate the pivoting of the trigger 2. In particular, the knob 3 may be provided with a mounting member 31, and the mounting member 31 may be provided with a pressing member 311. The pressing member 311 abuts against the pressing part 22. Rotation of the knob 3 causes the pressing member 311 to rotate circumferentially along the axis of the knob 3, thereby activating the pressing part 22 to trigger the switch 15.

[0029] See Figures 3 to 6Figure 5 shows an exploded view of the structure at the handle of the hair dryer in one embodiment of this application from another perspective. Figure 6 shows a cross-sectional view of the structure at the knob of the hair dryer in one embodiment of this application. Preferably, the knob 3 may be provided with a positioning member 32, which may be a protrusion that protrudes radially along the knob 3; the mounting member 31 may be provided with a positioning part 312, which may be a groove that is recessed radially along the mounting member 31. The positioning member 32 and the positioning part 312 are inserted and engaged to realize the synchronous rotation of the mounting member 31 and the knob 3. The mounting member 31 and the knob 3 are respectively located on the side of the outer shell 1. Specifically, the mounting member 31 is located on the inner side of the outer shell 1, and the knob 3 is located on the outer side of the outer shell 1. The ball bearing 42 and the elastic member 43 may be located on the mounting member 31, thereby simplifying the assembly difficulty.

[0030] In some or other preferred embodiments, a connecting portion 33 may be provided at the approximately central position of the knob 3. The connecting portion 33 may be a tubular component with one end integrally formed with the knob 3 and the other end open. A through hole may be provided in the housing 1 at the fixed position of the knob 3, and the connecting portion 33 may pass through the through hole. A connecting member 34 may be provided at the end of the connecting portion 33 away from the knob 3. The connecting member 34 may be a screw. The knob 3 may also be provided with a retaining member 35, which may be a compression spring. The retaining member 35 may be sleeved on the connecting member 34, with one side abutting against the knob 3 and the other side abutting against the housing 1, thereby connecting the knob 3 to the outside of the housing 1 and transmitting the rotation of the knob 3 to the inside of the housing 1. In particular, the shank portion of the connecting member 34 may be threadedly connected to the connecting portion 33, and the shank head portion may abut against the surface of the mounting member 31, that is, the connecting member 34 passes through the mounting member 31 and is threadedly connected to the connecting portion 33. The size of the mounting part 31 is larger than the size of the through hole, so the mounting part 31 can prevent the connecting part 33 from coming out of the housing 1.

[0031] In some or other preferred embodiments, the knob 3 may be provided with a release component 5 for resetting the knob 3, and a reset member 16 may be provided inside the housing 1. One end of the reset member 16 is connected to the knob 3, and the other end is connected to the housing 1. When the knob 3 is touched, the reset member 16 has elastic potential energy to reset the knob 3, so that the knob 3 is automatically reset after the release component 5 releases the knob 3.

[0032] In some or other preferred embodiments, the release component 5 may include a pushing part 51, the number of which may correspond one-to-one with the number of gear holes 41. The pushing part 51 may be at least partially inserted into the gear hole 41. The pushing part 51 has a first state and a second state. When the pushing part 51 is in the first state, it is located in the gear hole 41 and abuts against the ball 42. The pushing part 51 pushes the ball 42 from the first position to the second position. The pushing part 51 can push the ball 42 to the second position where the knob 3 can rotate. At this time, the knob 3 can rotate freely, and under the action of the reset member 16, the knob 3 can automatically reset to the initial position. When the pushing part 51 is in the second state, it is at least partially removed from the gear hole 41, and the elastic member 43 pushes the ball 42 from the second position to the first position. At this time, the ball 42 is located in the first position, thereby limiting the position of the knob 3.

[0033] In some or other preferred embodiments, the release assembly 5 may further include a fixing member 52 disposed on the knob 3, and a pushing part 51 connected to the fixing member 52. The fixing member 52 may be annular, the pushing part 51 may be disposed on the end wall of the fixing member 52, the fixing member 52 may be slidably connected to the housing 1 along the axial direction, and the connecting part 33 at the center of the knob 3 may be inserted into the center of the fixing member 52, and the knob 3 may be able to rotate freely relative to the axis of the fixing member 52.

[0034] In some or other preferred embodiments, the release assembly 5 further includes a force-applying member 53 connected to the fixing member 52. The force-applying member 53 may be a circular plate. The force-applying member 53 may be connected to the fixing member 52 and is located outside the housing 1. Operating the force-applying member 53 from outside the housing 1 drives the fixing member 52, thereby unlocking the knob 3. Preferably, the force-applying member 53 is configured to be adjacent to the knob 3, specifically, the force-applying member 53 and the knob 3 are concentrically arranged.

[0035] In some or other preferred embodiments, a connecting rod 531 may be provided on the force-applying member 53, and the connecting rod 531 may be located at the edge of the force-applying member 53. A latching block 5311 may be provided at the end of the connecting rod 531, and the latching block 5311 may be located at the end of the connecting rod 531 away from the force-applying member 53. The latching block 5311 may be provided with a guide portion, which may be a bevel or an arc surface. A fixing hole 521 may be provided between the fixing member 52 and the pushing member 51, and the fixing hole 521 may be a through hole extending along the thickness direction of the fixing member 52. The connecting rod 531 is fixed in place with the fixing hole 521, and the latching block 5311 may pass through the height hole to connect the fixing member 52 and the force-applying member 53 together. When the fixing member 52 and the force-applying member 53 are fixed, the end wall of the force-applying member 53 and the end wall of the fixing member 52 may be in contact or have a first gap, and the end face of the connecting rod 531 is below the end face of the pushing member 51.

[0036] In some or other preferred embodiments, the outer surface of the housing 1 may be provided with a receiving portion 7. The receiving portion 7 may be a platform protruding outward along the outer surface of the housing 1 and recessed to form a blind hole. The through hole may be located at the center of the blind hole, and the knob 3 is connected to the receiving portion 7. A limiting flange 71 may be provided on the periphery of the receiving portion 7 on the housing 1. The limiting flange 71 may be concentrically arranged with the receiving portion 7. A locking portion 36 may be provided on the periphery of the knob 3. The locking portion 36 may be arranged along the range of the knob 3. The locking portion 36 may fit against the limiting flange 71, thereby limiting the axial position of the knob 3. A stop portion 361 may extend inward from the locking portion 36. The stop portion 361 may be integrally formed with the locking portion 36. The stop portion 361 may be clearance-fitted with the receiving portion 7, thereby limiting the circumferential position of the knob 3. A relief portion 37 may be provided on the knob 3 to avoid the fixing member 52. The relief portion 37 may be a notch. The knob 3 may be provided with an operating handle 38, which extends radially along the knob 3 to facilitate hand operation and pressing.

[0037] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A hair dryer, characterized in that, include: shell; The duct is at least partially housed within the outer casing; An electric motor is connected to the duct and has an output shaft; Fan blades are connected to the output shaft and located within the duct. A controller is connected to the motor to control the rotation of the motor; Trigger, pivoting on the housing; A switch, at least partially housed within the housing and triggered by the trigger; A knob, which is connected to the housing and triggers the switch when rotated; A limiting mechanism restricts and maintains the position of the knob.

2. The hair dryer according to claim 1, characterized in that, The limiting mechanism includes a gear position hole, a ball bearing, and an elastic element. The gear position hole is located on either the knob or the housing, and the ball bearing and elastic element are located on the other. At least two gear position holes are provided. The ball bearing has a first position and a second position. When the ball bearing is in the first position, it is at least partially located within the gear position hole. When the ball bearing is in the second position, it is completely disengaged from the gear position hole. The elastic element abuts against the ball bearing.

3. The hair dryer according to claim 1, characterized in that, The trigger includes an operating part and a pressing part, which are located at the ends of the pivot shaft. The pressing part is provided with an arc-shaped flange that abuts against the switch. The knob is provided with a pressing element that abuts against the pressing part. The knob is provided with a positioning element and a mounting element. The mounting element is provided with a positioning part, and the positioning element is inserted into the positioning part. The mounting element and the knob are located on the side of the housing.

4. The hair dryer according to claim 1, characterized in that, The knob is provided with a connecting part, and the outer shell is provided with a through hole at the fixed position of the knob. The connecting part passes through the through hole, and a connector is provided at the end of the connecting part. The knob is also provided with a clamping member, which is sleeved on the connector. One side of the clamping member abuts against the knob, and the other side abuts against the outer shell.

5. The hair dryer according to claim 2, characterized in that, The knob is provided with a release component to reset the knob, and a reset member is provided inside the housing. When the knob is touched, the reset member has elastic potential energy to reset the knob.

6. The hair dryer according to claim 5, characterized in that, The release assembly includes a pushing part, the number of which corresponds one-to-one with the number of gear holes. The pushing part has a first state and a second state. When the pushing part is in the first state, it is located in the gear hole and abuts against the ball, and the pushing part pushes the ball from the first position to the second position. When the pushing part is in the second state, it is at least partially removed from the gear hole, and the elastic element pushes the ball from the second position to the first position. The pushing part pushes the ball to the second position where the knob can rotate.

7. The hair dryer according to claim 6, characterized in that, The release assembly also includes a fixing member disposed on the knob, the pushing part being located on the fixing member, the knob being rotatable relative to the axis of the fixing member, and the fixing member being slidably connected to the housing along the axial direction.

8. The hair dryer according to claim 7, characterized in that, The release assembly further includes a force-applying member connected to the fixing member, the force-applying member being connected to the fixing member and located outside the housing.

9. The hair dryer according to claim 8, characterized in that, The force-applying component is provided with a connecting rod, and the end of the connecting rod is provided with a latching block. The latching block is provided with a guide part. The fixing component is provided with a fixing hole between the pushing part. The connecting rod is fixed in cooperation with the fixing hole. The knob is provided with a relief part to avoid the fixing component. When the fixing component is fixed to the force-applying component, the end wall of the force-applying component is in contact with the end wall of the fixing component or a first gap is provided, and the end face of the connecting rod is below the end face of the pushing part.

10. The hair dryer according to claim 1, characterized in that, The outer surface of the housing is provided with a receiving portion, and the knob is located in the receiving portion; the housing is provided with a limiting flange around the receiving portion, and the knob is provided with a locking portion around the periphery, the locking portion fitting against the limiting flange, the locking portion extending inward to a stop portion, the stop portion cooperating with the receiving portion; the knob is provided with an operating handle.

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