A smoke machine baffle switch mechanism and a smoke machine

Abstract

The application discloses a smoke machine baffle switch mechanism and a smoke machine. The smoke machine baffle switch mechanism comprises a connecting piece, a driving module, a connecting rod, a first rotating shaft and a first sliding bearing. The connecting piece is used for being connected with an external baffle. The driving module is capable of being connected with an external machine body. The driving module is connected with the connecting rod. One of the connecting piece and the connecting rod is connected with the first rotating shaft, and the other is connected with the first sliding bearing. The first rotating shaft is arranged in the first sliding bearing. The first rotating shaft and the first sliding bearing are respectively connected with the connecting piece and the connecting rod. The first rotating shaft is arranged in the first sliding bearing. In the process that the connecting rod drives the connecting piece to move, when the connecting piece rotates relative to the connecting piece, the first rotating shaft rotates in the first sliding bearing. The first sliding bearing can reduce the friction force of the connecting piece rotating relative to the connecting rod and can reduce the generated noise, so as to improve the use experience and make the baffle opening and closing more smooth.

Description

Technical Field

[0001] This invention relates to the field of range hoods, and particularly to a range hood baffle switch mechanism and a range hood. Background Technology

[0002] With the improvement of living standards, people are seeking a better cooking environment, and most families have installed range hoods in their kitchens to remove cooking fumes. Some existing range hoods have baffles at the smoke inlet. When the range hood is working, the baffles are opened to increase the smoke collection area, and when the range hood is turned off, the baffles are closed to reduce the space occupied and lower the chance of collision.

[0003] In existing range hood technology, a drive module is typically connected to a baffle via a linkage and connector. The linkage and connector then push the baffle to open and close. However, the linkage and connector are hinged with pins, which causes noise when the connector rotates relative to the linkage during operation, affecting the user experience. Furthermore, the high friction during the rotation of the connector relative to the linkage can easily increase with wear and tear over time, leading to uneven opening and closing and increased burden on the drive module. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a range hood baffle switch mechanism and a range hood, which can reduce the noise generated when the baffle is opened and closed, and make the baffle opening and closing smoother.

[0005] According to a first aspect of the present invention, a range hood baffle switch mechanism includes: a connector for connecting to an external baffle; a drive module for connecting to an external body; a connecting rod, wherein the drive module is connected to the connecting rod; a first rotating shaft and a first sliding bearing, wherein one of the connector and the connecting rod is connected to the first rotating shaft and the other is connected to the first sliding bearing, and the first rotating shaft passes through the first sliding bearing.

[0006] According to an embodiment of the present invention, a range hood baffle switch mechanism has at least the following beneficial effects: a connecting member is connected to the range hood baffle, and a drive module drives the connecting member to move via a connecting rod, thereby driving the baffle to open and close. A first rotating shaft and a first sliding bearing are respectively connected to the connecting member and the connecting rod. The first rotating shaft passes through the first sliding bearing. With this structure, during the process of the connecting rod driving the connecting member to move, when the connecting member rotates relative to the connecting member, the first rotating shaft rotates within the first sliding bearing. The first sliding bearing can reduce the frictional force of the connecting member rotating relative to the connecting rod, and at the same time reduce the generated noise, which is beneficial to improving the user experience and making the baffle opening and closing smoother.

[0007] According to some embodiments of the present invention, a first self-locking nut is further included. The connector is provided with a first connecting hole, the connecting rod is provided with a second connecting hole, the first sliding bearing is disposed in the first connecting hole or the second connecting hole, one end of the first rotating shaft is provided with a first limiting part, the other end of the first rotating shaft is provided with a first threaded part, the first rotating shaft passes through the first connecting hole and the second connecting hole, the first self-locking nut is threadedly connected to the first threaded part, and the distance between the first self-locking nut and the first limiting part is greater than the sum of the depth of the first connecting hole and the depth of the second connecting hole.

[0008] According to some embodiments of the present invention, the drive module includes a motor assembly, a swing arm, a second rotating shaft, and a second sliding bearing. The motor assembly is connected to the swing arm. One of the swing arm and the connecting rod is connected to the second rotating shaft, and the other is connected to the second sliding bearing. The second rotating shaft passes through the second sliding bearing.

[0009] According to some embodiments of the present invention, a second self-locking nut is further included. The swing arm is provided with a third connecting hole, the connecting rod is provided with a fourth connecting hole, the second sliding bearing is disposed in the third connecting hole or the fourth connecting hole, one end of the second rotating shaft is provided with a second limiting part, the other end of the second rotating shaft is provided with a second threaded part, the second rotating shaft passes through the third connecting hole and the fourth connecting hole, the second self-locking nut is threadedly connected to the second threaded part, and the distance between the second self-locking nut and the second limiting part is greater than the sum of the depth of the third connecting hole and the depth of the fourth connecting hole.

[0010] According to some embodiments of the present invention, the drive module further includes a housing, which can be connected to an external body, the motor assembly is connected to the housing, the housing is provided with a guide rail, the swing arm is provided with a guide block, and the guide block passes through the guide rail.

[0011] According to some embodiments of the present invention, the drive module further includes a first micro switch and a second micro switch disposed on the housing, the first micro switch and the second micro switch being located at both ends of the guide rail, the guide block being able to move along the guide rail and abut against the first micro switch or the second micro switch, and both the first micro switch and the second micro switch being electrically connected to the motor assembly.

[0012] According to some embodiments of the present invention, the motor assembly includes a motor disposed in the housing and a drive circuit board, the drive circuit board being electrically connected to the motor, the first micro switch and the second micro switch respectively, the motor being connected to the swing arm, and the motor being able to change direction when its rotation is obstructed.

[0013] According to some embodiments of the present invention, the motor includes a permanent magnet rotor, a stator main winding, and a stator auxiliary winding. The drive circuit board is provided with a capacitor, a first power supply terminal, and a second power supply terminal. The first power supply terminal is connected to one end of the stator main winding and one end of the stator auxiliary winding, respectively. One end of the capacitor is connected to the other end of the stator auxiliary winding. The second power supply terminal is connected to the other end of the stator main winding and the other end of the capacitor, respectively. The permanent magnet rotor is connected to the swing arm.

[0014] According to a second aspect of the present invention, a range hood includes a body and a baffle, and further includes the above-described range hood baffle switch mechanism. The body is provided with a smoke inlet, the baffle is rotatably connected to the body to block the smoke inlet, the connector is connected to the baffle, and the drive module is connected to the body.

[0015] The range hood according to embodiments of the present invention has at least the following beneficial effects: the baffle is rotatably connected to the body, the connecting member is connected to the baffle, and the drive module drives the connecting member to move via a connecting rod, thereby driving the baffle to rotate relative to the body to achieve the effect of opening and closing the baffle. A first rotating shaft and a first sliding bearing are respectively connected to the connecting member and the connecting rod. The first rotating shaft passes through the first sliding bearing. With this structure, during the process of the connecting rod driving the connecting member to move, when the connecting member rotates relative to the connecting member, the first rotating shaft rotates within the first sliding bearing. The first sliding bearing can reduce the frictional force of the connecting member rotating relative to the connecting rod, and at the same time reduce the generated noise, which is beneficial to improving the user experience and making the opening and closing of the baffle smoother.

[0016] According to some embodiments of the present invention, a buffer member disposed on the body is further included, the buffer member being capable of abutting against the baffle to limit the contact between the baffle and the wall surface of the body forming the smoking port.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a cross-sectional view of one embodiment of the present invention;

[0020] Figure 2 This is an exploded perspective view of one embodiment of the present invention;

[0021] Figure 3This is a partial perspective view of one embodiment of the present invention;

[0022] Figure 4 This is a perspective view of one embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of a motor in one embodiment of the present invention. Detailed Implementation

[0024] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0025] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting this invention.

[0026] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0027] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0028] like Figures 1 to 4 As shown, a range hood baffle switch mechanism according to an embodiment of the present invention includes: a connector 100 for connecting to an external baffle 900; a drive module 200 for connecting to an external body 800; a connecting rod 300, the drive module 200 being connected to the connecting rod 300; a first rotating shaft 400 and a first sliding bearing 500, wherein one of the connector 100 and the connecting rod 300 is connected to the first rotating shaft 400 and the other is connected to the first sliding bearing 500, and the first rotating shaft 400 passes through the first sliding bearing 500.

[0029] The connector 100 is connected to the baffle 900 of the range hood. The drive module 200 drives the connector 100 to move via the connecting rod 300, thereby opening and closing the baffle 900. A first rotating shaft 400 and a first sliding bearing 500 are respectively connected to the connector 100 and the connecting rod 300. The first rotating shaft 400 passes through the first sliding bearing 500. With this structure, as the connecting rod 300 drives the connector 100 to move, when the connector 100 rotates relative to itself, the first rotating shaft 400 rotates within the first sliding bearing 500. The first sliding bearing 500 reduces the frictional force of the connector 100 rotating relative to the connecting rod 300, and also reduces noise, thus improving the user experience and making the opening and closing of the baffle 900 smoother.

[0030] Reference Figures 1 to 3 In some embodiments of the present invention, a first self-locking nut 600 is further included, a connector 100 is provided with a first connecting hole 110, a connecting rod 300 is provided with a second connecting hole 310, a first sliding bearing 500 is disposed in the first connecting hole 110 or the second connecting hole 310, a first limiting part 401 is provided at one end of the first rotating shaft 400, a first threaded part 402 is provided at the other end of the first rotating shaft 400, the first rotating shaft 400 passes through the first connecting hole 110 and the second connecting hole 310, the first self-locking nut 600 is threadedly connected to the first threaded part 402, and the distance between the first self-locking nut 600 and the first limiting part 401 is greater than the sum of the depth of the first connecting hole 110 and the depth of the second connecting hole 310.

[0031] The first sliding bearing 500 is connected to the wall of the first connecting hole 110 or the wall of the second connecting hole 310. The first rotating shaft 400 passes through the first connecting hole 110 and the second connecting hole 310, and is also passed through the first sliding bearing 500. The first self-locking nut 600 is threadedly connected to the first threaded portion 402 of the first rotating shaft 400. The first limiting portion 401 and the first self-locking nut 600 can prevent the first rotating shaft 400 from dislodging from the first connecting hole 110 and the second connecting hole 310. A first self-locking nut 600 is used. After the first self-locking nut 600 is screwed into the first threaded part 402 to a certain depth, the first self-locking nut 600 cannot be screwed in further due to its self-locking effect, thus achieving a self-locking fixation effect without needing to abut against other objects. Furthermore, the distance between the first limiting part 401 and the first self-locking nut 600 is greater than the sum of the depths of the first connecting hole 110 and the second connecting hole 310. That is, the first limiting part 401 and the first self-locking nut 600 do not clamp the connecting member 100 and the connecting rod 300. There is a gap between the connecting member 100 and the first self-locking nut 600 or the first limiting part 401, which can prevent the increase of the frictional force of the connecting member 100 rotating relative to the connecting rod 300. In this way, the connecting rod 300 and the connecting member 100 are rotatably connected. The structure is simple, the assembly and operation are convenient, and the frictional force of the connecting member 100 rotating relative to the connecting rod 300 can be minimized.

[0032] Reference Figure 1 and Figure 2 In some embodiments of the present invention, the drive module 200 includes a motor assembly 210, a swing arm 220, a second rotating shaft 230, and a second sliding bearing 240. The motor assembly 210 is connected to the swing arm 220. One of the swing arm 220 and the connecting rod 300 is connected to the second rotating shaft 230, and the other is connected to the second sliding bearing 240. The second rotating shaft 230 passes through the second sliding bearing 240.

[0033] The motor assembly 210 drives the swing arm 220 to swing, and the swing arm 220 pushes the connecting rod 300 to move the connecting piece 100, thereby driving the baffle 900 to open and close. At the same time, the swing arm 220 and the connecting rod 300 are connected by the second rotating shaft 230 and the second sliding bearing 240. When the swing arm 220 pushes the connecting rod 300, the connecting rod 300 will rotate relative to the swing arm 220. The second sliding bearing 240 can reduce the friction of the connecting rod 300 rotating relative to the swing arm 220, and at the same time reduce noise, which is beneficial to improving the user experience.

[0034] In some embodiments of the present invention, the drive module 200 may also be an implementation including devices such as cylinders and electric cylinders, which drive the connecting rod 300 to move the connecting member 100.

[0035] Reference Figure 1 and Figure 2 In some embodiments of the present invention, a second self-locking nut 700 is also included. The swing arm 220 is provided with a third connecting hole 221. The second sliding bearing 240 is disposed in the third connecting hole 221 or the fourth connecting hole 320. The connecting rod 300 is provided with a fourth connecting hole 320. One end of the second rotating shaft 230 is provided with a second limiting part 231. The other end of the second rotating shaft 230 is provided with a second threaded part 232. The second rotating shaft 230 passes through the third connecting hole 221 and the fourth connecting hole 320. The second self-locking nut 700 is threadedly connected to the second threaded part 232. The distance between the second self-locking nut 700 and the second limiting part 231 is greater than the sum of the depth of the third connecting hole 221 and the depth of the fourth connecting hole 320.

[0036] The second sliding bearing 240 is connected to the wall of the third connecting hole 221 or the wall of the fourth connecting hole 320. The second rotating shaft 230 passes through the third connecting hole 221 and the fourth connecting hole 320, and also passes through the second sliding bearing 240. The second self-locking nut 700 is threadedly connected to the second threaded portion 232 of the second rotating shaft 230. The second limiting portion 231 and the second self-locking nut 700 can prevent the second rotating shaft 230 from dislodging from the third connecting hole 221 and the fourth connecting hole 320. A second self-locking nut 700 is used. After the second self-locking nut 700 and the second threaded part 232 are screwed into each other to a certain depth, the self-locking characteristic of the second self-locking nut 700 prevents it from being screwed in further, achieving a self-locking and fixing effect. The second self-locking nut 700 does not need to be fixed against other objects. Furthermore, the distance between the second limiting part 231 and the second self-locking nut 700 is greater than the sum of the depths of the third connecting hole 221 and the fourth connecting hole 320. That is, the second limiting part 231 and the second self-locking nut 700 do not clamp the swing arm 220 and the connecting rod 300. There is a gap between the connecting rod 300 and the second self-locking nut 700 or the second limiting part 231, which can prevent the frictional force of the connecting rod 300 rotating relative to the swing arm 220 from increasing. In this way, the effect of the connecting rod 300 and the swing arm 220 rotating connection is achieved. The structure is simple, the assembly and operation are convenient, and the frictional force of the connecting rod 300 rotating relative to the swing arm 220 is minimized.

[0037] Reference Figure 1 and Figure 2 In some embodiments of the present invention, the drive module 200 further includes a housing 250, which can be connected to an external body 800. The motor assembly 210 is connected to the housing 250. The housing 250 is provided with a guide rail 251, and the swing arm 220 is provided with a guide block 222, which passes through the guide rail 251.

[0038] The motor assembly 210 is connected to the body 800 of the range hood via the housing 250, which facilitates assembly and fixing. Meanwhile, the housing 250 is provided with a guide rail 251, and the guide block 222 on the swing arm 220 passes through the guide rail 251. The guide block 222 moves along the guide rail 251, which makes the swing arm 220 more stable when driven by the motor assembly 210, thus improving reliability.

[0039] Reference Figure 1 and Figure 2 In some embodiments of the present invention, the drive module 200 further includes a first micro switch 260 and a second micro switch 270 disposed on the housing 250. The first micro switch 260 and the second micro switch 270 are located at both ends of the guide rail 251. The guide block 222 moves along the guide rail 251 and can abut against the first micro switch 260 or the second micro switch 270. Both the first micro switch 260 and the second micro switch 270 are electrically connected to the motor assembly 210.

[0040] By setting a first micro switch 260 and a second micro switch 270 at both ends of the guide rail 251, when the motor assembly 210 drives the swing arm 220 to swing, the guide block 222 on the swing arm 220 moves along the guide rail 251. When the guide block 222 presses against the first micro switch 260 or the second micro switch 270, the first micro switch 260 or the second micro switch 270 generates an electrical signal that is transmitted to the motor assembly 210, causing the motor assembly 210 to stop driving the swing arm 220. With this structure, when the motor assembly 210 drives the baffle 900 to the open or closed position, it will automatically stop rotating without the need to detect or calculate the rotation angle of the motor assembly 210, making implementation more convenient.

[0041] Reference Figure 4 In some embodiments of the present invention, the motor assembly 210 includes a motor 211 disposed in the housing 250 and a drive circuit board. The drive circuit board is electrically connected to the motor 211, the first micro switch 260 and the second micro switch 270 respectively. The motor 211 is connected to the swing arm 220. When the rotation of the motor 211 is obstructed, the direction of rotation can be changed.

[0042] When the motor 211 encounters obstruction, it changes direction, causing the motor 211 to drive the swing arm 220 to move the connecting rod 300 and the connecting member 100. During the opening or closing of the baffle 900, if the baffle 900 comes into contact with other objects obstructing its movement, the motor 211 changes direction, moving the baffle 900 away from the obstructing object. Therefore, if a user accidentally places their hand in the path of the baffle 900's opening or closing, the baffle 900 moves in the opposite direction after contacting the hand, preventing hand pinching and improving safety.

[0043] In some embodiments of the present invention, a microcontroller or embedded chip and a relay may be provided on the drive circuit board. The first micro switch 260 and the second micro switch 270 are connected to the control chip. The control chip is connected to the coil of the relay. The contacts of the relay are connected to the motor 211 and the power supply terminal respectively. The control chip can control the power supply of the motor 211 through the relay, thereby controlling the motor 211 to start or stop.

[0044] Reference Figure 4 In some embodiments of the present invention, the motor 211 includes a permanent magnet rotor 212, a stator main winding 213 and a stator auxiliary winding 214. The drive circuit board is provided with a capacitor 215, a first power supply terminal 216 and a second power supply terminal 217. The first power supply terminal 216 is connected to one end of the stator main winding 213 and one end of the stator auxiliary winding 214, respectively. One end of the capacitor 215 is connected to the other end of the stator auxiliary winding 214, and the second power supply terminal 217 is connected to the other end of the stator main winding 213 and the other end of the capacitor 215, respectively. The permanent magnet rotor 212 is connected to the swing arm 220.

[0045] The stator auxiliary winding 214 is connected in series with the capacitor 215 and then in parallel with the stator main winding 213. Alternating current is supplied to the first power supply terminal 216 and the second power supply terminal 217. Under the phase shifting effect of the capacitor 215, there is a phase difference between the stator auxiliary winding 214 and the stator main winding 213, so that the magnetic field generated by the stator main winding 213 and the stator auxiliary winding 214 can drive the permanent magnet rotor 212 to rotate.

[0046] The magnetic field generated by the stator main winding 213 and the stator auxiliary winding 214 can drive the permanent magnet rotor 212 to rotate in either the forward or reverse direction. That is, the magnetic field can apply power regardless of whether the permanent magnet rotor 212 rotates clockwise or counterclockwise. The initial rotation direction of the permanent magnet rotor 212 is related to the initial angle of the permanent magnet rotor 212. Since the permanent magnet rotor 212 is restricted to rotating in only one direction when the baffle 900 is in the open or closed position, the direction of rotation of the motor 211 can be determined when the baffle 900 is opened, closed, or started. When the baffle 900 moves and comes into contact with the object, the permanent magnet rotor 212 is forced to stop rotating and can only rotate in the opposite direction. During the short period of time that it stops rotating, the phase of the magnetic field generated by the stator main winding 213 and the stator auxiliary winding 214 relative to the permanent magnet rotor 212 changes, causing the magnetic field to exert a reverse rotational force on the permanent magnet rotor 212, causing the permanent magnet rotor 212 to rotate in the opposite direction. This achieves automatic change of direction when the rotation of the permanent magnet rotor 212 is obstructed, without the need for control devices, which is beneficial to simplifying the control design. Furthermore, relying on the structural characteristics of the motor 211 itself, no additional devices are required, which is beneficial to saving components, simplifying the structure, and making implementation more convenient.

[0047] If the baffle 900 comes into contact with other objects during the opening (or closing) process, its reverse movement will cause it to contact the first microswitch 260 (or the second microswitch 270) at the starting point, generating a corresponding electrical signal that is transmitted to the control chip. The control chip can determine whether the baffle 900 is opening (or closing) normally or returning midway based on this signal. If it returns midway, the control chip instructs the motor 211 to continue running, causing the baffle 900 to open (or close) again. Thus, the control chip only needs to control the motor 211 to continue running or stop based on the electrical signals generated by the first microswitch 260 and the second microswitch 270, without needing to participate in the reverse rotation process of the motor 211. This simplifies the control logic and makes implementation easier.

[0048] During the opening process, if the control chip receives electrical signals from the first micro switch 260 multiple times, or during the closing process, if the control chip receives electrical signals from the second micro switch 270 multiple times, it indicates that there may be non-accidental factors preventing the baffle 900 from opening or closing. In some embodiments of the present invention, when the number of times the control chip receives electrical signals from the first micro switch 260 during the opening process exceeds a preset threshold, or the number of times it receives electrical signals from the second micro switch 270 during the closing process exceeds a preset threshold, the control chip controls the motor 211 to stop running and alerts the user of the malfunction through a buzzer or indicator light, facilitating troubleshooting.

[0049] The motor assembly 210 may also include a transmission mechanism such as a gear set. The permanent magnet rotor 212 is connected to the swing arm 220 through the transmission mechanism, which enhances the load-carrying capacity of the permanent magnet rotor 212.

[0050] In some embodiments of the present invention, in addition to the above-described method of achieving reverse reversal of motor 211 due to obstruction, a control chip and a current detection circuit can also be provided on the drive circuit board. The current detection circuit is electrically connected to the control chip and is connected to the first power supply terminal 216 and / or the second power supply terminal 217. The control chip can obtain the current values ​​of the stator main winding 213 and the stator auxiliary winding 214 through the current detection circuit. Since the currents of the stator main winding 213 and the stator auxiliary winding 214 will change when motor 211 is obstructed, the control chip can know that the baffle 900 is in contact with the object, and then control the motor 211 to reverse, so as to achieve the effect of reverse reversal of motor 211 due to obstruction.

[0051] Reference Figure 1 and Figure 4According to a second aspect embodiment of the present invention, a range hood includes a body 800 and a baffle 900, and also includes the above-mentioned range hood baffle switch mechanism. The body 800 is provided with a smoke inlet 810. The baffle 900 is rotatably connected to the body 800 to block the smoke inlet 810. The connector 100 is connected to the baffle 900, and the drive module 200 is connected to the body 800.

[0052] The baffle 900 is rotatably connected to the body 800, and the connecting piece 100 is connected to the baffle 900. The drive module 200 drives the connecting piece 100 to move via the connecting rod 300, which in turn drives the baffle 900 to rotate relative to the body 800, thus achieving the opening and closing effect of the baffle 900. The first rotating shaft 400 and the first sliding bearing 500 are respectively connected to the connecting piece 100 and the connecting rod 300. The first rotating shaft 400 passes through the first sliding bearing 500. With this structure, when the connecting rod 300 drives the connecting piece 100 to move, and the connecting piece 100 rotates relative to itself, the first rotating shaft 400 rotates within the first sliding bearing 500. The first sliding bearing 500 reduces the frictional force of the connecting piece 100 rotating relative to the connecting rod 300, and also reduces the noise generated, which helps improve the user experience and makes the opening and closing of the baffle 900 smoother.

[0053] The baffle 900 can be an embodiment of an object such as a glass plate or a metal plate.

[0054] Reference Figure 1 and Figure 4 In some embodiments of the present invention, a buffer member 820 disposed on the body 800 is also included. The buffer member 820 can abut against the baffle 900 to limit the contact between the baffle 900 and the wall surface of the body 800 forming the smoke inlet 810.

[0055] When the baffle 900 is closed, the baffle 900 comes into contact with the buffer 820. The buffer 820 can absorb the impact force of the baffle 900, reduce the noise level when the baffle 900 is closed, achieve a noise reduction effect, and improve the user experience.

[0056] When the baffle 900 contacts the buffer 820, the guide also contacts the second micro switch 270, which can prevent the baffle 900 from moving in the opposite direction.

[0057] The buffer 820 can be implemented using objects such as rubber pillars or silicone pads.

[0058] 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.

[0059] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A range hood baffle switch mechanism, characterized in that, include: A connector (100) is used to connect to an outer baffle (900); The drive module (200) is capable of connecting to an external unit (800); Link (300), the drive module (200) is connected to the link (300); The first rotating shaft (400) and the first sliding bearing (500) are provided. One of the connecting member (100) and the connecting rod (300) is connected to the first rotating shaft (400) and the other is connected to the first sliding bearing (500). The first rotating shaft (400) passes through the first sliding bearing (500). The first self-locking nut (600), the connector (100) is provided with a first connecting hole (110), the connecting rod (300) is provided with a second connecting hole (310), the first sliding bearing (500) is provided in the first connecting hole (110) or the second connecting hole (310), one end of the first rotating shaft (400) is provided with a first limiting part (401), the other end of the first rotating shaft (400) is provided with a first threaded part (402), the first rotating shaft (400) passes through the first connecting hole (110) and the second connecting hole (310), the first self-locking nut (600) is threadedly connected to the first threaded part (402), and the distance between the first self-locking nut (600) and the first limiting part (401) is greater than the sum of the depth of the first connecting hole (110) and the depth of the second connecting hole (310); The drive module (200) includes a motor assembly (210), a swing arm (220), a second rotating shaft (230), a second sliding bearing (240), and a second self-locking nut (700). The motor assembly (210) is connected to the swing arm (220). One of the swing arm (220) and the connecting rod (300) is connected to the second rotating shaft (230), and the other is connected to the second sliding bearing (240). The second rotating shaft (230) passes through the second sliding bearing (240). The swing arm (220) is provided with a third connecting hole (221), the connecting rod (300) is provided with a fourth connecting hole (320), the second sliding bearing (240) is provided in the third connecting hole (221) or the fourth connecting hole (320), one end of the second rotating shaft (230) is provided with a second limiting part (231), the other end of the second rotating shaft (230) is provided with a second threaded part (232), the second rotating shaft (230) passes through the third connecting hole (221) and the fourth connecting hole (320), the second self-locking nut (700) is threadedly connected to the second threaded part (232), and the distance between the second self-locking nut (700) and the second limiting part (231) is greater than the sum of the depth of the third connecting hole (221) and the depth of the fourth connecting hole (320).

2. The range hood baffle switch mechanism according to claim 1, characterized in that: The drive module (200) also includes a housing (250), which can be connected to an external body (800). The motor assembly (210) is connected to the housing (250). The housing (250) is provided with a guide rail (251). The swing arm (220) is provided with a guide block (222), which passes through the guide rail (251).

3. The range hood baffle switch mechanism according to claim 2, characterized in that: The drive module (200) further includes a first micro switch (260) and a second micro switch (270) disposed on the housing (250). The first micro switch (260) and the second micro switch (270) are located at both ends of the guide rail (251). The guide block (222) moves along the guide rail (251) and can abut against the first micro switch (260) or the second micro switch (270). Both the first micro switch (260) and the second micro switch (270) are electrically connected to the motor assembly (210).

4. The range hood baffle switch mechanism according to claim 3, characterized in that: The motor assembly (210) includes a motor (211) disposed in the housing (250) and a drive circuit board. The drive circuit board is electrically connected to the motor (211), the first micro switch (260) and the second micro switch (270) respectively. The motor (211) is connected to the swing arm (220). The motor (211) can change direction when its rotation is obstructed.

5. The range hood baffle switch mechanism according to claim 4, characterized in that: The motor (211) includes a permanent magnet rotor (212), a stator main winding (213) and a stator auxiliary winding (214). The drive circuit board is provided with a capacitor (215), a first power supply terminal (216) and a second power supply terminal (217). The first power supply terminal (216) is connected to one end of the stator main winding (213) and one end of the stator auxiliary winding (214) respectively. One end of the capacitor (215) is connected to the other end of the stator auxiliary winding (214). The second power supply terminal (217) is connected to the other end of the stator main winding (213) and the other end of the capacitor (215) respectively. The permanent magnet rotor (212) is connected to the swing arm (220).

6. A range hood, characterized in that: The device includes a body (800) and a baffle (900), and also includes a baffle switch mechanism for a range hood as described in any one of claims 1 to 5. The body (800) is provided with a smoke inlet (810), the baffle (900) is rotatably connected to the body (800) to block the smoke inlet (810), the connector (100) is connected to the baffle (900), and the drive module (200) is connected to the body (800).

7. The range hood according to claim 6, characterized in that: It also includes a buffer (820) disposed on the body (800), the buffer (820) being able to abut against the baffle (900) to limit the baffle (900) from contacting the wall surface of the body (800) that forms the smoke inlet (810).

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