Hot air extraction device

Abstract

The present invention discloses a hot air outlet device, including an air guide duct, an air induction member and a driving member. The air inlet and the air outlet of the air guide duct are respectively connected to the two ends of the heating chamber. The air induction member is arranged close to the air inlet. The driving member drives the air induction member to rotate, generating airflow in the heating chamber. The driving member includes a first heating element, which can generate a rotating magnetic field and generate heat when powered. In the present invention, the first heating element is a component that realizes the driving function of the driving member. The first heating element can generate a rotating magnetic field when powered, so that the driving member generates a torque for driving the air induction member to rotate. The heat released by the first heating element itself is used to make the airflow generated by the air induction member heat up after flowing through the driving member, and form hot air to be discharged from the air outlet, while realizing rapid cooling of the driving member. The resistance encountered during the flow of the airflow is small, and no heating wire is provided, so as to avoid the heating wire generating vibration noise and forming heat radiation at high temperature.

Description

Technical Field

[0001] The present invention relates to the technical field of cold air heating, and in particular to a hot air outlet device. Background Art

[0002] There are many devices on the market that can generate hot air, such as hair dryers and dryers, which use hot air to accelerate the evaporation of moisture. In related technologies, resistance wires are usually used to heat the cold air. The resistance wires generate a large amount of heat and have a certain amount of heat radiation. The resistance wires are usually very thin and will vibrate when the air flows through, generating noise and wind resistance to the air flow, affecting the air output efficiency. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a hot air outlet device that can outlet hot air without radiation, and has low noise and wind resistance.

[0004] The hot air outlet device according to an embodiment of the present invention includes:

[0005] An air guide duct has a heating chamber inside, the air guide duct has an air inlet and an air outlet, and the air inlet and the air outlet are respectively connected to the two ends of the heating chamber;

[0006] An air induction member is accommodated in the heating chamber and is arranged close to the air inlet;

[0007] The driving member is located on the side of the air-inducing member facing the air outlet. The driving member is connected to the air-inducing member and can drive the air-inducing member to rotate to generate airflow in the heating chamber. The driving member includes a first heating element, which can generate a rotating magnetic field and generate heat when powered.

[0008] The hot air outlet device according to the embodiment of the present invention has at least the following beneficial effects:

[0009] In the hot air extraction device in the embodiment of the present invention, the first heating element is a component that realizes the driving function of the driving member. The first heating element can be energized to generate a rotating magnetic field, so that the driving member can generate a torque for driving the guide member to rotate. The heat released by the first heating element itself is used to make the air flow generated by the guide member flow through the driving member and heat up, and form hot air to be discharged from the air outlet, while realizing rapid cooling of the driving member. The air flow encounters little resistance during the flow process, and no heating wire is provided to avoid the heating wire generating vibration noise and forming heat radiation at high temperature.

[0010] According to some embodiments of the present invention, a heat conducting member is further included, which includes a connecting portion and heat dissipation fins. The connecting portion is sleeved on the outer periphery of the first heating element. A plurality of heat dissipation fins are provided. The heat dissipation fins are connected to the outer surface of the connecting portion and are distributed at intervals along the circumference of the connecting portion.

[0011] According to some embodiments of the present invention, one end of the heat dissipating fin away from the connecting portion abuts against the inner wall of the air guiding duct.

[0012] According to some embodiments of the present invention, the heat dissipation fin has two opposite air guiding surfaces in the circumferential direction of the connecting portion, and the two air guiding surfaces intersect on a side facing the air inlet.

[0013] According to some embodiments of the present invention, the projection of the heat dissipation fins toward the air outlet is arc-shaped, and a plurality of the heat dissipation fins are evenly distributed on the periphery of the connecting portion.

[0014] According to some embodiments of the present invention, a heating component is further included, which is accommodated in the heating cavity and is located on the side of the air induction member facing the air outlet. The heating component includes a second heating element and an electromagnetic coil, part of the second heating element is inserted into the electromagnetic coil, the connecting part is sleeved on the second heating element, and at least part of the outer surface of the second heating element is in contact with the connecting part.

[0015] According to some embodiments of the present invention, the heating component includes multiple groups of electromagnetic coils, and the multiple groups of electromagnetic coils are distributed at intervals on the outer surface of the second heating element.

[0016] According to some embodiments of the present invention, the second heating element has a mounting groove, the mounting groove is recessed on the outer surface of the second heating element, and the electromagnetic coil is embedded in the mounting groove.

[0017] According to some embodiments of the present invention, the heating component is connected to the driving member, the heating component is located on the side of the driving member facing the air outlet, and / or the heating component is located on the side of the driving member facing the air inlet.

[0018] According to some embodiments of the present invention, the heating component includes a fixing seat, the second heating element is sleeved on the outside of the fixing seat, and the driving member is rotatably connected to the fixing seat.

[0019] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0021] Figure 1 This is a schematic structural diagram of an embodiment of a hot air outlet device of the present invention;

[0022] Figure 2 This is a schematic structural diagram of another embodiment of the hot air outlet device of the present invention;

[0023] Figure 3 for Figure 2 Explosion intention of the hot air extraction device;

[0024] Figure 4 for Figure 1 A schematic structural diagram of an embodiment of a middle driving member;

[0025] Figure 5 This is a schematic structural diagram of an embodiment of a heating component.

[0026] Reference numerals:

[0027] Air guide duct 100, heating chamber 110, air inlet 120, air outlet 130, support base 140; air inducing member 200; driving member 300, first heating element 310, stator 320, rotor 330, rotating shaft 340, core base 350; heat conducting member 400, connecting part 410, heat dissipating fins 420; heating component 500, second heating element 510, mounting groove 511, electromagnetic coil 520, fixing base 530. DETAILED DESCRIPTION

[0028] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0029] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0030] In the description of the present invention, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] In the description of the present invention, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0033] Reference Figure 1 In an embodiment of the present invention, a hot air outlet device is provided, which can heat up the cold air and discharge it to achieve the effect of discharging hot air. The hot air outlet device includes an air guide duct 100, an air inducing member 200 and a driving member 300. The air guide duct 100 has a heating chamber 110 inside, and the air inducing member 200 and the driving member 300 are placed in the heating chamber 110. The air guide duct 100 has an air inlet 120 and an air outlet 130. The air inlet 120 and the air outlet 130 are respectively connected to the two ends of the heating chamber 110. External air can enter the heating chamber 110 from the air inlet 120 and be discharged from the air outlet 130. The air inducing member 200 is arranged close to the air inlet 120. The driving member 300 is located on the side of the air inducing member 200 facing the air outlet 130 and is connected to the air inducing member 200. The driving member 300 can drive the air inducing member 200 to rotate. The rotation of the air inducing member 200 drives the air entering the heating chamber 110 to flow and generates airflow.

[0034] Reference Figure 4The driving member 300 includes a first heating element 310, which can be energized to generate a rotating magnetic field and generate heat. The heat generated by the first heating element 310 is dissipated into the heating chamber 110. The cold air flow generated by the air induction member 200 flows through the first heating element 310 and takes away the heat released by the first heating element 310. The cold air flow heats up to form hot air and is discharged from the air outlet 130. The driving member 300 is selected as a motor, which usually includes a stator that generates a rotating magnetic field after being energized, a rotor that cuts the magnetic flux lines of the rotating magnetic field and generates electromagnetic torque, and a rotating shaft connected to the rotor and used to output torque. The rotating shaft is connected to the air-inducing member 200 and drives the air-inducing member 200 to rotate; the first heating element 310 in this embodiment is set as the stator. When the motor is working, eddy currents are generated on the plane of the stator and heat is generated. The stator is usually located on the outside of the motor to facilitate the release of heat from the stator. The cold air flow flows through the driving member 300 and takes away the heat released by the stator. On the one hand, it heats the cold air, and on the other hand, it quickly dissipates heat from the stator, thereby increasing the service life of the driving member 300.

[0035] Therefore, in the hot air extraction device in the embodiment of the present invention, the first heating element 310 is a component that realizes the driving function of the driving member 300. The first heating element 310 can be energized to generate a rotating magnetic field, so that the driving member 300 generates a torque for driving the guide member to rotate. The heat released by the first heating element 310 itself is used to make the air flow generated by the guide member 200 flow through the driving member 300 and heat up, and form hot air to be discharged from the air outlet 130, while realizing rapid cooling of the driving member 300. The resistance encountered during the flow of the air flow is small, and no heating wire is provided to avoid the heating wire generating vibration noise and forming heat radiation at high temperature.

[0036] It should be noted that the stator can be made of multiple sets of silicon steel sheets to ensure that the stator has a certain magnetic permeability. Some of the silicon steel sheets can be replaced with iron sheets to increase the heat generation of the stator and improve the heat of the air discharged from the air outlet 130, but the driving member 300 must ensure continuous normal operation. The air inducing member 200 can be an axial flow impeller, which includes a hub and multiple blades connected to the outer periphery of the hub. The rotation of the axial flow impeller generates airflow in the axial direction, thereby achieving axial air inlet and axial air outlet of the air guide duct 100.

[0037] like Figure 4As shown, the driving member 300 includes a stator 320, a rotor 330, and a rotating shaft 340. The stator 320 includes an iron core and a coil wound around the iron core. The rotor 330 is configured as a magnetic ring and is inserted into the iron core. The magnetic ring is sleeved on the outside of the rotating shaft 340. When the stator 320 is energized, a rotating magnetic field is generated. The magnetic ring cuts the magnetic flux lines and rotates, providing torque to the rotating shaft 340. The rotating shaft 340 rotates with the rotation of the rotor 330, thereby driving the air inducing member 200 to rotate and generate airflow. The driving member 300 also includes a core base 350, which is used to mount and fix the rotor 330. The core base 350 is provided on the outside of the rotor 320 and stator 330 to protect the rotor 320 and stator 330 and to enhance the structural strength of the driving member 300. The rotating shaft 340 is inserted through the core base 350 and extends to the outside of the core base 350 to connect with the air inducing member 200.

[0038] like Figure 1 As shown, a support base 140 is provided in the air duct 100 to support the driving member 300. One end of the support base 140 is connected to the inner wall of the air duct 100, and the other end of the support base 140 is connected to the driving member 300 and supports the driving member 300. The rotating shaft and the air inducing member 200 are coaxial, which facilitates the connection between the two and enables the driving member 300 to be stably installed in the air duct 100. It is conceivable that the support base 140 can be set as a hollow structure to provide a channel for airflow to pass through, thereby reducing the flow resistance of the airflow.

[0039] like Figure 2 As shown, in one embodiment of the present invention, the hot air extraction device further includes a heat conductor 400, which includes a connecting portion 410 and heat dissipation fins 420. The interior of the connecting portion 410 is hollow, and the connecting portion 410 is sleeved on the outer periphery of the first heating element 310. A plurality of heat dissipation fins 420 are provided, and the heat dissipation fins 420 are connected to the outer surface of the connecting portion 410 and are distributed at intervals along the circumference of the connecting portion 410. The heat dissipation fins 420 form gaps in the circumference of the connecting portion 410 for airflow to pass through. The heat released by the first heating element 310 can be directly transferred to the connecting portion 410 and dissipated into the heating chamber 110 via the heat dissipation fins 420. The heat dissipation area of ​​the heat conductor 400 is large, which can effectively improve the heat dissipation efficiency of the first heating element 310, achieve rapid cooling of the first heating element 310, and improve the hot air extraction efficiency of the hot air extraction device.

[0040] It should be noted that the heat dissipating fins 420 are spaced apart along the circumference of the connecting portion 410, allowing cold air to flow through the gaps between the heat dissipating fins 420. Furthermore, the larger heat dissipating surfaces of the heat dissipating fins 420 are oriented toward the circumference of the connecting portion 410, ensuring sufficient heat dissipation gaps between the heat dissipating fins 420 and minimizing airflow resistance. The heat conducting element 400 should be made of a material that is both heat-conducting and heat-dissipating, such as metal or silicone.

[0041] Furthermore, the area of ​​the wind-guiding surfaces of the heat-dissipating fins 420 on either side of the connection portion 410 should be larger than the area of ​​the side surfaces of the heat-dissipating fins 420 on either side of the connection portion 410 in the axial direction to facilitate heat dissipation and reduce wind resistance. To further reduce the resistance of airflow passing through the heat-dissipating fins 420, the two wind-guiding surfaces of the heat-dissipating fins 420 on the side facing the air inlet 120 intersect, thereby reducing the area of ​​the side surfaces of the heat-dissipating fins 420 facing the air inlet 120 and thereby reducing wind resistance. It is conceivable that the tapered surface of the heat-dissipating fins 420 on the side facing the air inlet 120 can reduce the noise caused by airflow impacting the heat-dissipating fins 420 and reduce airflow resistance.

[0042] In addition, one end of the heat dissipation fin 420 away from the connecting portion 410 is in contact with the inner wall of the air guide duct 100, and the heat conductive member 400 can provide support to the driving member 300. There is no need to set up a support seat 140, and the driving member 300 can be stably installed in the hot air outlet device. In addition, the two sides of the heat conductive member 400 respectively support the inner wall of the air guide duct 100 and the outer wall of the driving member 300, thereby improving the stability of the assembly of the heat conductive member 400, the driving member 300 and the air guide duct 100.

[0043] The heat dissipation fins 420 are evenly distributed on the periphery of the connection portion 410. The heat dissipation fins 420 can be configured as thin plates, and a plurality of heat dissipation fins 420 can be arranged in a radial pattern. Figure 3 As shown, the projection of the heat dissipation fin 420 toward the air outlet 130 or the air inlet 120 is arc-shaped, and multiple heat dissipation fins 420 are evenly distributed on the periphery of the connecting portion 410. The arc-shaped heat dissipation fins 420 are more in line with the flow law of the airflow, which can reduce the noise generated when the airflow flows through the heat dissipation fins 420 and make the airflow more evenly distributed in the radial direction of the connecting portion 410.

[0044] like Figure 5As shown, in one embodiment of the present invention, a heating component 500 is further included, and the heating component 500 is used to assist in heat generation when the heat dissipation of the first heating element 310 is insufficient. The heating component 500 is accommodated in the heating cavity 110 and is located on the side of the air induction member 200 facing the air outlet 130, so that the cold air flow can flow through the heating component 500 and heat up; the heating component 500 includes a second heating element 510 and an electromagnetic coil 520, a part of the second heating element 510 is inserted into the electromagnetic coil 520, and the heat conductive member 400 is sleeved on the outside of the second heating element 510 and contacts the outer surface of the second heating element 510.

[0045] According to the heating principle of the electromagnetic induction coil, the electromagnetic coil 520 generates an alternating magnetic field after being energized. The magnetic conductive object placed inside the electromagnetic coil 520, namely the second heating element 510, cuts the magnetic lines of force and forms eddy currents inside the second heating element 510. The eddy currents cause the atoms inside the second heating element 510 to move irregularly at high speed. The mutual collision and friction of the atoms generate heat, thereby heating the second heating element 510. The second heating element 510 heats up and releases heat. The heat is directly transferred to the connecting part 410 in contact with the second heating element 510, and is dissipated into the heating cavity 110 through the heat dissipation fins 420.

[0046] It should be noted that the driving member 300 and the heating component 500 can be powered by passing a wire into the air guide duct 100 to provide heat for the first heating element 310 and the second heating element 510. The wire can be attached to the wall of the air guide duct 100 to avoid shaking when the air flows.

[0047] In addition, the corresponding operation button can be set to turn on or off the heating component 500. For example, when the heat generated by the driving member 300 is low at the beginning of operation, the heating component 500 can be turned on at the same time, and the heating component 500 can be used to assist in heat generation, thereby increasing the temperature of the air output of the hot air outlet device in the early stage of use; after the hot air outlet device has been working for a certain period of time, the heating component 500 can be turned off, the heat generation of the heating component 500 is stopped, and the first heating element 310 alone provides heat; when the hot air outlet device is used for a high-temperature air output requirement, the heating component 500 can be turned on, and the first heating element 310 and the heating component 500 can be used to generate heat at the same time.

[0048] The heating assembly 500 may include multiple sets of electromagnetic coils 520, which simultaneously provide an alternating magnetic field to the second heating element 510, thereby improving the heating efficiency of the heating assembly 500. To ensure that the second heating element 510 can fully contact the thermal conductor 400, the multiple electromagnetic coils 520 are spaced apart on the second heating element 510, leaving a portion of the outer surface of the second heating element 510 in contact with the thermal conductor 400 for heat transfer.

[0049] like Figure 5As shown, in one embodiment, the heating component 500 includes two groups of electromagnetic coils 520, which are respectively sleeved on both ends of the second heating body 510. The middle area of ​​the second heating body 510 can fully contact the connecting portion 410 of the heat conductor 400, so that the connecting portion 410 dissipates heat evenly.

[0050] The second heating element 510 also has a mounting groove 511, which is recessed in the outer surface of the second heating element 510. The electromagnetic coil 520 is embedded in the mounting groove 511 so that the outer surface of the electromagnetic coil 520 is lower than the outer surface of the second heating element 510, or is flush with the outer surface of the second heating element 510, thereby avoiding interference between the electromagnetic coil 520 and the inner wall of the connecting part 410, thereby affecting the contact and heat conduction between the connecting part 410 and the second heating element 510.

[0051] like Figure 5 As shown, the mounting grooves 511 are arranged at both ends of the second heating element 510 and are recessed relative to the outer surface of the second heating element 510. The outer surface of the electromagnetic coil 520 is lower than the outer surface of the second heating element 510. The connecting part 410 can be sleeved on the outside of the second heating element 510 and contact the middle part of the second heating element 510.

[0052] The heating component 500 is located on the side of the driving member 300 facing the air outlet 130, and / or the heating component 500 is located on the side of the driving member 300 facing the air outlet 130. The heating component 500 can be connected to the heating component 500 on both sides of the axial direction of the rotating shaft 340, or the heating component 500 is connected only on one side. Multiple heating components 500 can generate heat at the same time, which is beneficial to increase the air outlet temperature of the hot air outlet device.

[0053] The heating component 500 and the driving member 300 passing through the connecting portion 410 are in contact with the inner wall of the connecting portion 410 . The heating component 500 and the driving member 300 are assembled by being connected to the connecting portion 410 .

[0054] Furthermore, the driving member 300 can be connected to the heating component 500 via a rotating shaft 340 to improve the connection strength between the heating component 500 and the driving member 300. In one embodiment, the heating component 500 includes a fixed base 530, and the second heating element 510 is sleeved on the outside of the fixed base 530. The fixed base 530 is tightly fitted with the second heating element 510 and supports the second heating element 510. The rotating shaft 340 is rotatably connected to the fixed base 530. When the rotating shaft 340 drives the air inducing member 200 to rotate, the rotating shaft 340 rotates relative to the fixed base 530, and the rotating shaft 340 supports the fixed base 530 and realizes the connection between the heating component 500 and the driving member 300. The fixed base 530 and the rotating shaft 340 can be connected by a bearing to realize the rotational connection between the rotating shaft and the fixed base 530.

[0055] While the embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited to the embodiments described above. Various modifications may be made within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof may be combined with one another unless there is a conflict.

Claims

1. Hot air outlet device, characterized in that: include: An air guide duct has a heating chamber inside, the air guide duct has an air inlet and an air outlet, and the air inlet and the air outlet are respectively connected to the two ends of the heating chamber; An air induction member is accommodated in the heating chamber and is arranged close to the air inlet; a driving member, located on a side of the air-inducing member facing the air outlet, the driving member being connected to the air-inducing member and being capable of driving the air-inducing member to rotate so as to generate an airflow in the heating chamber, the driving member comprising a first heating element, the first heating element being capable of generating a rotating magnetic field and generating heat when energized, the driving member comprising a stator, a rotor and a rotating shaft, the first heating element being configured as the stator, the stator comprising an iron core and a coil wound around the iron core, the rotor being configured as a magnetic ring and passing through the interior of the iron core, the magnetic ring being sleeved on the exterior of the rotating shaft, the stator generating a rotating magnetic field when energized, providing torque to the rotating shaft, and the rotating shaft driving the air-inducing member to rotate and generate an airflow; a heat conducting member, the heat conducting member comprising a connecting portion and heat dissipation fins, the connecting portion being sleeved on the outer periphery of the first heating element, a plurality of heat dissipation fins being provided, the heat dissipation fins being connected to the outer surface of the connecting portion and being spaced apart along the circumference of the connecting portion; The heating component is used to assist in generating heat in the initial stage of operation of the driving member. It is accommodated in the heating cavity and is located on the side of the air-inducing member facing the air outlet. The heating component includes a second heating element and an electromagnetic coil. Part of the second heating element is inserted into the electromagnetic coil. The connecting part is sleeved on the second heating element, and at least part of the outer surface of the second heating element is in contact with the connecting part.

2. The hot air outlet device according to claim 1, characterized in that: The areas of the air guide surfaces of the heat dissipating fins on both sides of the connecting portion in the circumferential direction are larger than the areas of the side surfaces of the heat dissipating fins on both sides of the connecting portion in the axial direction; And / or, the heat dissipation fin forms a conical surface on a side facing the air inlet; And / or, the projection of the heat dissipating fins toward the air outlet or the air inlet is arc-shaped.

3. The hot air outlet device according to claim 1, characterized in that: One end of the heat dissipation fin away from the connecting portion abuts against the inner wall of the air guide duct.

4. The hot air outlet device according to claim 1, characterized in that: The heat dissipation fin has two opposite air guide surfaces in the circumferential direction of the connecting portion, and the two air guide surfaces intersect on one side facing the air inlet.

5. The hot air outlet device according to claim 1, characterized in that: The projection of the heat dissipation fins toward the air outlet is arc-shaped, and a plurality of the heat dissipation fins are evenly distributed on the periphery of the connecting portion.

6. The hot air outlet device according to claim 1, characterized in that: It also includes an operation button, which is used to turn on or off the heating component.

7. The hot air outlet device according to claim 6, characterized in that: The heating component includes multiple groups of electromagnetic coils, and the multiple groups of electromagnetic coils are distributed at intervals on the outer surface of the second heating body.

8. The hot air outlet device according to claim 6, characterized in that: The second heating element has a mounting groove, which is recessed on the outer surface of the second heating element, and the electromagnetic coil is embedded in the mounting groove.

9. The hot air outlet device according to claim 6, characterized in that: The heating component is connected to the driving member, and the heating component is located on a side of the driving member facing the air outlet, and / or the heating component is located on a side of the driving member facing the air inlet.

10. The hot air outlet device according to claim 9, characterized in that: The heating component includes a fixing seat, the second heating element is sleeved on the outside of the fixing seat, and the driving member is rotatably connected to the fixing seat.

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