Telescopic panel assembly and range hood with same

Abstract

The utility model discloses a telescopic panel assembly and a range hood with the telescopic panel assembly. The telescopic panel assembly comprises a telescopic inner cavity, a telescopic panel and a driving assembly. The telescopic panel is slidably connected into the telescopic inner cavity, and a moving assembly is arranged on the telescopic panel; the driving assembly is arranged in the telescopic inner cavity and comprises a driving part and a transmission assembly, the driving part adopts a motor, the transmission assembly comprises a first connecting rod, a second connecting rod, a first gear and a second gear, the first end of the first connecting rod is connected with the output end of the driving part, and the second end of the first connecting rod is connected with the first end of the second connecting rod; the second end of the second connecting rod is rotationally connected with the first gear, the second gear is meshed with the first gear, a center shaft of the first gear is rotationally connected into the telescopic inner cavity, and the second gear is in transmission connection with the moving assembly. Compared with the prior art, the telescopic panel assembly is more stable in the telescopic process.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, and particularly to a telescopic panel assembly and a range hood having the same. Background Art

[0002] In the prior art, some range hoods are provided with telescopic panel assemblies, and functional devices such as lighting lamps and air curtain blowers are arranged on the telescopic panel assemblies. When the range hood is in use, the telescopic panel assembly is driven to extend by a driving mechanism, so that functional devices such as lighting lamps and air curtain blowers can be started and used. When the range hood is turned off, the driving mechanism drives the telescopic panel assembly to retract, so as to reduce the occupation of the kitchen space by functional devices such as lighting lamps and air curtain blowers in the idle state. The related art drives the telescopic panel assembly to extend or retract through a motor, but each time the extended state and the retracted state are switched, the driving direction of the motor needs to be changed through a commutator. Repeatedly changing the driving direction causes relatively large loss to the motor and easily causes instability in the telescopic process of the telescopic panel assembly. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a telescopic panel assembly and a range hood having the same, which are used to solve the above technical problems.

[0004] The telescopic panel assembly of the utility model is used for a range hood and comprises:

[0005] A telescopic cavity;

[0006] A telescopic panel, which is slidably connected in the telescopic cavity and is provided with a moving component thereon;

[0007] A driving component, which is arranged in the telescopic cavity and comprises a driving member and a transmission component. The driving member adopts a motor. The transmission component comprises a first connecting rod, a second connecting rod, a first gear and a second gear. The first end of the first connecting rod is connected to the output end of the driving member, the second end of the first connecting rod is connected to the first end of the second connecting rod, the second end of the second connecting rod is rotatably connected to the first gear, the second gear meshes with the first gear, the central axis of the first gear is rotatably connected in the telescopic cavity, and the second gear is in transmission connection with the moving component.

[0008] According to an embodiment of the utility model, the steering of the motor driving the first connecting rod to rotate remains unchanged. The first connecting rod pulls the second connecting rod to rotate. Each time the first connecting rod rotates half a turn, the rotation direction of the second connecting rod changes once.

[0009] According to an embodiment of the present utility model, the first connecting rod has a first extreme position and a second extreme position. When in the first extreme position, the first end of the first connecting rod is located between the first end and the second end of the second connecting rod; when in the second extreme position, the second end of the first connecting rod is located between the first end of the first connecting rod and the second end of the second connecting rod. The first connecting rod rotates half a circle with the output end of the motor as the center, rotating from the first extreme position to the second extreme position or from the second extreme position to the first extreme position.

[0010] According to an embodiment of the present utility model, after the second connecting rod rotates to the first extreme position / the second extreme position, the telescopic panel extends / retracts into the telescopic cavity, and the driving member stops starting. When the driving member starts again, the rotation direction of the first connecting rod remains unchanged, the second connecting rod swings in the opposite direction, and drives the second gear to rotate in the opposite direction. The second gear drives the moving assembly to move in the opposite direction and makes the telescopic panel retract / extend into the telescopic cavity.

[0011] According to an embodiment of the present utility model, when in the first extreme position / the second extreme position, the second end of the second connecting rod is located below the center of the second gear.

[0012] According to an embodiment of the present utility model, the torque M of the second connecting rod = FR 2 sinθ; F is the force exerted by the first connecting rod on the second end of the second connecting rod, and θ is the included angle between the first connecting rod and the second connecting rod. When in the second extreme position, the included angle between the first connecting rod and the second connecting rod is 180°. When moving from the first extreme position, the included angle between the first connecting rod and the second connecting rod is 0°. When the first connecting rod moves from the second extreme position to the first extreme position, the included angle between the first connecting rod and the second connecting rod gradually decreases, and the second connecting rod drives the second gear to accelerate first and then decelerate.

[0013] According to an embodiment of the present utility model, when moving from the second extreme position to the first extreme position, when the included angle θ between the first connecting rod and the second connecting rod decreases to 45°, the motor stops for a time t1, and then continues to drive the first connecting rod to move to the first extreme position.

[0014] According to an embodiment of the present utility model, the moving assembly includes a wheel shaft rotatably connected to the telescopic panel and a follower wheel provided on the wheel shaft. The wheel shaft is connected to the output end of the transmission assembly, and a guiding rack is provided in the telescopic cavity. The follower wheel meshes with the guiding rack.

[0015] According to an embodiment of the present utility model, a guiding assembly is provided on the bottom plate or both side wall surfaces of the telescopic cavity, and the guiding assembly is connected to the telescopic panel.

[0016] A range hood adopts the above telescopic panel assembly, including a range hood main body. The range hood main body has a telescopic cavity, and a driving assembly drives the telescopic panel to extend or retract into the telescopic cavity.

[0017] According to one embodiment of the utility model, a wind curtain assembly and / or a PM2.5 detection module and / or a lighting assembly is provided in the installation cavity of the telescopic panel, and a wind curtain air intake and a wind curtain air outlet corresponding to the wind curtain assembly, and / or a detection air hole corresponding to the PM2.5 detection module, and / or a lighting window corresponding to the lighting assembly are provided on the telescopic panel. When the telescopic panel extends out of the telescopic inner cavity, the wind curtain air intake and the wind curtain air outlet of the wind curtain assembly are moved out of the telescopic inner cavity; or / and the detection air hole of the PM2.5 detection module is moved out of the telescopic inner cavity; or / and the lighting window is moved out of the telescopic inner cavity.

[0018] Compared with the prior art, the telescopic panel assembly of the utility model has the following advantages:

[0019] In the telescopic panel assembly of the utility model, the first connecting rod, the second connecting rod and the first gear together form a crank-connecting rod mechanism. The movement characteristics of the crank-connecting rod mechanism are utilized so that each time the motor drives the first connecting rod to rotate a preset stroke, the rotation direction of the first gear can be synchronously changed once through the second connecting rod. In this way, the rotation direction of the second gear meshing with the first gear will also change, and thus the movement direction of the moving assembly connected to the second gear will also change, thereby switching the extension / retraction state of the telescopic panel without changing the direction of the motor. Since the motor does not need to repeatedly change the driving direction, the loss is small and the driving process is more stable, thereby improving the stability of the telescopic panel's extension and retraction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the telescopic panel assembly of the utility model;

[0021] Figure 2 It is a structural schematic diagram of an embodiment of a driving assembly of a telescopic panel assembly of the utility model;

[0022] Figure 3 It is a schematic diagram of the structure of the driving assembly of the telescopic panel assembly of the utility model in another direction;

[0023] Figure 4 It is a schematic structural diagram of a range hood having a telescopic panel assembly of the utility model when the telescopic panel is retracted into the telescopic inner cavity;

[0024] Figure 5 It is a structural schematic diagram of a range hood having a telescopic panel assembly of the utility model when the telescopic panel extends out of the telescopic inner cavity;

[0025] Figure 6 It is a structural schematic diagram of another direction when the telescopic panel of the range hood having the telescopic panel assembly of the utility model extends out of the telescopic inner cavity.

[0026] In the figure: a. Telescopic inner cavity; a1. Guide rack; a2. Guide assembly; 1. Telescopic panel; 11. Moving assembly; 111. Wheel axle; 112. Follow-up wheel; 12. Air curtain suction port; 13. Air curtain air outlet; 14. Detection air hole; 15. Lighting window; 2. Driving assembly; 21. Driving member; 22. Transmission assembly; 221. First connecting rod; 222. Second connecting rod; 223. First gear; 224. Second gear; 3. Range hood main body.

[0027] The realization and advantages of the present utility model will be further described with reference to the accompanying drawings in combination with embodiments. Specific embodiments

[0028] The following will disclose multiple embodiments of the present utility model in the form of diagrams. For the sake of clarity, many practical details will be described together in the following narrative. However, it should be understood that these practical details should not be used to limit the present utility model. That is to say, in some embodiments of the present utility model, these practical details are not necessary. In addition, for the purpose of simplifying the diagrams, some conventional structures and components will be shown in a simple schematic manner in the diagrams.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0030] In addition, in the present utility model, descriptions such as "first" and "second" are only for descriptive purposes, and do not particularly refer to the order or sequence, nor are they used to limit the present utility model. They are merely used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0031] In order to further understand the content, characteristics and effects of the present utility model, the following embodiments are cited and described in detail in conjunction with the accompanying drawings as follows:

[0032] The present utility model discloses a telescopic panel assembly for a range hood. Please refer to Figures 1 to 3 , the telescopic panel assembly includes a telescopic inner cavity a, a telescopic panel 1 and a driving assembly 2.

[0033] The telescopic panel 1 is slidably connected within the telescopic cavity a, and is provided with a moving component 11 thereon; the driving component 2 is disposed within the telescopic cavity a, and includes a driving member 21 and a transmission component 22. The driving member 21 is a motor. The transmission component 22 includes a first connecting rod 221, a second connecting rod 222, a first gear 223, and a second gear 224. The first end of the first connecting rod 221 is connected to the output end of the driving member 21, the second end of the first connecting rod 221 is connected to the first end of the second connecting rod 222, the second end of the second connecting rod 222 is rotatably connected to the first gear 223, the second gear 224 meshes with the first gear 223, the central axis of the first gear 223 is rotatably connected within the telescopic cavity a, and the second gear 224 is in transmission connection with the moving component 11.

[0034] In this embodiment, the telescopic cavity a is used to accommodate the telescopic panel 1 and the driving component 2. The telescopic cavity a is a cavity on the device to which the telescopic panel assembly is applied. For example, when the telescopic panel assembly is applied to a range hood, the telescopic cavity a is a cavity of the range hood. Functional devices can be provided on the telescopic panel 1. When applied to a range hood, the functional devices can be a lighting lamp, an air curtain fan, etc. By enabling the telescopic panel 1 to have a first state of extending out of the telescopic cavity a and a second state of driving the telescopic panel 1 to retract into the telescopic cavity a, when the functional devices are needed, the telescopic panel 1 is extended out of the telescopic cavity a, and when not needed, the telescopic panel 1 can be retracted into the telescopic cavity a to hide the telescopic panel 1 and reduce the space occupied by functional devices such as the lighting lamp and the air curtain fan in the idle state. Then the specific structure of the telescopic panel 1 can be designed according to actual needs and will not be specifically limited herein.

[0035] The moving component 11 cooperates with the driving component 2 to drive the telescopic panel 1 to extend out of or retract into the telescopic cavity a. There can be many structures for the moving component 11, as long as it can cooperate with the driving component 2 to drive the telescopic panel 1 to perform telescopic movement, and the specific structure of the moving component 11 will not be limited herein.

[0036] It should be noted that if the first connecting rod 221 and the second connecting rod 222 are arranged in parallel, the first end of the first connecting rod 221 and the first end of the second connecting rod 222 are arranged on the same side, and the second end of the first connecting rod 221 and the second end of the second connecting rod 222 are arranged on the same side. The first connecting rod 221 is rotatably connected to the second connecting rod 222. By connecting the first end of the first connecting rod 221 to the output end of the driving member 21, the second end of the first connecting rod 221 to the first end of the second connecting rod 222, and the second end of the second connecting rod 222 to the first gear 223, the first connecting rod 221, the second connecting rod 222 and the first gear 223 constitute a crank connecting rod mechanism. The transmission assembly 22 is formed by the first connecting rod 221, the second connecting rod 222, the first gear 223 and the second gear 224. The crank-connecting rod mechanism is cleverly utilized so that the driving member 21 can drive the moving assembly 11 to switch between forward motion and reverse motion within a preset stroke through the transmission assembly 22, so that the motor does not need to be set as a forward and reverse motor, that is, there is no need to set a commutator, and only a unidirectional motor is needed to realize forward and reverse driving of the moving assembly 11.

[0037] If the telescopic panel 1 extends out of the telescopic inner cavity a when the moving component 11 moves forward, the telescopic panel 1 will retract into the telescopic inner cavity a when the moving component 11 moves backward. Conversely, if the telescopic panel 1 retracts into the telescopic inner cavity a when the moving component 11 moves forward, the telescopic panel 1 will extend out of the telescopic inner cavity a when the moving component 11 moves backward.

[0038] Taking the example that the telescopic panel 1 extends out of the telescopic inner cavity a when the moving component 11 moves forward and retracts into the telescopic inner cavity a when the moving component 11 moves backward, the motor does not need to switch the direction of rotation when the moving component 11 switches the direction of movement, so the motor does not need to switch the direction of rotation when the telescopic panel 1 switches between the first state and the second state. By utilizing the motion characteristics of the crank-connecting rod mechanism, after the motor drives the first connecting rod 221 to rotate a preset stroke, the rotation direction of the first gear 223 can be synchronously changed once through the second connecting rod 222, so that the rotation direction of the second gear 224 meshing with the first gear 223 will also change, and thus the motion direction of the moving component 11 connected to the second gear 224 will also change, and then the extension / retraction state of the telescopic panel 1 can be switched without changing the direction of rotation of the motor; since the motor does not need to repeatedly change the driving direction of rotation, the loss is small, and the driving process is more stable, thereby improving the stability of the telescopic panel 1 during the telescopic process.

[0039] According to an embodiment of the present utility model, the steering of the motor driving the first link 221 to rotate remains unchanged. The first link 221 pulls the second link 222 to rotate. Each time the first link 221 rotates half a turn, the rotation direction of the second link 222 changes once. In this way, the movement stroke passed by the moving component 11 before each change in the movement direction can be made the same, that is, the stroke of the telescopic panel 1 moving out of and retracting into the telescopic cavity a is the same, so as to simplify the state switching process of the telescopic panel 1, thereby simplifying the overall structure of the telescopic panel assembly and improving the stability of the telescopic panel 1 during the movement process.

[0040] According to an embodiment of the present utility model, please refer to Figure 2 and Figure 3 , the first link 221 has a first limit position and a second limit position. At the first limit position, the first end of the first link 221 is located between the first end and the second end of the second link 222; at the second limit position, the second end of the first link 221 is located between the first end of the first link 221 and the second end of the second link 222. The first link 221 rotates half a turn with the output end of the motor as the center, rotating from the first limit position to the second limit position or from the second limit position to the first limit position.

[0041] Taking the driving member 21 driving the first link 221 to rotate clockwise with the first extreme position as the starting position, and the first link 221 moving from the first extreme position to the second extreme position as an example, the commutation principle of the driving assembly 2 will be described: The driving member 21 drives the first link 221 to rotate clockwise. When the first link 221 is at the first extreme position, the first end of the second link 222 also moves to the extreme position. At this time, the distance between the second end of the second link 222 and the first end of the first link 221 is the shortest. When the driving member 21 drives the first link 221 to rotate clockwise, the second end of the first link 221 swings downward and pulls the first end of the second link 222 connected thereto to swing downward. When the first end of the second link 222 swings downward, the second end of the second link 222 exerts an upward force on the first gear 223. Since the first gear 223 cannot move up and down, the force of the second link 222 on the first gear 223 becomes a rotational force, causing the first gear 223 to rotate clockwise; When the first link 221 moves to the second extreme position, the second link 222 also moves to the extreme position. At this time, the distance between the second end of the second link 222 and the first end of the first link 221 is the largest. Since the length of the second link 222 is less than the diameter of the first gear 223, when the second end of the first link 221 continues to swing upward at the second extreme position, the first end of the second link 222 cannot continue to swing upward with the second segment of the first link 221, and the second end of the second link 222 will swing downward. Similarly, since the first gear 223 cannot move up and down, the force of the second link 222 on the first gear 223 becomes a rotational force, causing the first gear 223 to rotate counterclockwise, and the rotation direction of the first gear 223 changes; Since the second gear 224 is driven by the first gear 223, the second gear 224 commutes synchronously with the first gear 223.

[0042] According to an embodiment of the present invention, please refer to Figure 2 and Figure 3 , after the second link 222 rotates to the first extreme position / second extreme position, the telescopic panel 1 extends / retracts into the telescopic cavity a, the driving member 21 stops starting. When the driving member 21 starts again, the rotation direction of the first link 221 remains unchanged, the second link 222 swings in the reverse direction, and drives the second gear 224 to rotate in the reverse direction. The second gear 224 drives the moving assembly 11 to move in the reverse direction and makes the telescopic panel 1 retract / extend into the telescopic cavity a.

[0043] When applied to a range hood, when the range hood starts, the telescopic panel 1 needs to fully extend out of the telescopic cavity a. Therefore, after the telescopic panel 1 fully extends out of the telescopic cavity a, the driving member 21 stops starting. At this time, the air curtain assembly or the lighting assembly on the range hood main body 3 can extend out of the telescopic cavity a and work when the range hood is operating; when the range hood finishes the oil fume extraction work, the user turns off the range hood, and the driving member 21 will start again and retract the telescopic panel 1 into the telescopic cavity a. When the telescopic panel 1 completely retracts into the telescopic cavity a, the driving member 21 stops starting. In this embodiment, when the telescopic panel 1 fully extends out of the telescopic cavity a, the first link 221 is at the first extreme position, and when the telescopic panel 1 completely retracts into the telescopic cavity a, the first link 221 is at the second extreme position.

[0044] According to an embodiment of the present invention, please refer to Figure 2 and Figure 3 , when at the first extreme position / second extreme position, the second end of the second link 222 is located below the center of the second gear 224. When at the first extreme position / second extreme position, the second end of the second link 222 is located below the center of the second gear 224, which means that when the second link 222 is at the first extreme position or the second extreme position, the distance that the second link 222 extends towards the corresponding side is less than the distance that a radius of the first gear 223, which coincides with the extension line passing through the midpoint of the central axis of the motor and the midpoint of the first gear 223, extends towards the corresponding side. Therefore, at the first extreme position and the second extreme position, when the first link 221 continues to rotate in the same direction, the second link 222 will not be able to continue to rotate in the same direction as the first link 221 due to its length problem, and thus a commutation will occur, which can achieve driving the first gear 223 to rotate forward half a turn and reverse half a turn.

[0045] According to an embodiment of the present utility model, the torque M of the second connecting rod 222 is M = FR2sinθ; F is the force exerted by the first connecting rod 221 on the second end of the second connecting rod 222, and θ is the included angle between the first connecting rod 221 and the second connecting rod 222. At the second limit position, the included angle between the first connecting rod 221 and the second connecting rod 222 is 180°. When moving from the first limit position, the included angle between the first connecting rod 221 and the second connecting rod 222 is 0°. When the first connecting rod 221 moves from the second limit position to the first limit position, the included angle between the first connecting rod 221 and the second connecting rod 222 gradually decreases, and the second connecting rod 222 drives the second gear 224 to accelerate first and then decelerate. At the second limit position, the included angle between the first connecting rod 221 and the second connecting rod 222 is 180°. When moving from the second limit position to the first limit position again, the included angle between the first connecting rod 221 and the second connecting rod 222 decreases from 180° to 0°. According to the variation law of the sine function, when θ changes from 180° to 90°, the value of sinθ gradually increases from 0 until θ is 90°, and sinθ reaches the maximum value of 1. Therefore, the torque change of the second connecting rod 222 also starts from 0 and increases to the maximum value. When θ changes from 90° to 0°, sinθ gradually decreases from the maximum value of 1 until θ is 0°, and sinθ reaches the minimum value of 0. Therefore, the torque change of the second connecting rod 222 also starts from the maximum value and decreases to 0. It can be seen that when the first connecting rod 221 moves from the second limit position to the first limit position, the torque of the second connecting rod experiences a process of increasing first and then decreasing, thereby driving the second gear 224 to accelerate first and then decelerate. When it needs to be applied to a range hood, if an anti-pinch position needs to be set, an anti-pinch position can be set in the deceleration section. At the anti-pinch position, the motor stop time t1 is set. Since the rotational speed of the first gear 223 is very small in the deceleration section, the inertia of the first gear 223 when it stops running is very small at this time, and the first gear 223 and the second gear 224 will not violently collide due to inertia, which can protect the first gear 223 and the second gear 224.

[0046] According to an embodiment of the present utility model, when moving from the second extreme position to the first extreme position, when the included angle θ between the first connecting rod 221 and the second connecting rod 222 decreases to 45°, the motor stops for a time t1, and then continues to drive the first connecting rod 221 to move to the first extreme position. The stop time of the motor can be designed according to actual requirements and will not be specifically limited herein. When θ decreases to 45°, after the force of the first connecting rod 221 acts on the second connecting rod 222, the torque of the second connecting rod 222 is very small, and the moving speed of the first gear 223 is very small. At this time, stopping the operation of the motor can prevent the first gear 223 and the second gear 224 from violently colliding due to inertia, and can protect the first gear 223 and the second gear 224. Setting the stop time t of the motor at this position is to meet the requirement of setting an anti-pinch distance and ensuring the length of the anti-pinch distance when the telescopic panel assembly is applied to the range hood.

[0047] According to an embodiment of the present utility model, as shown in FIG. 1, the moving assembly 11 includes a wheel shaft 111 rotatably connected to the telescopic panel 1 and a follower wheel 112 provided on the wheel shaft 111. The wheel shaft 111 is connected to the output end of the transmission assembly 22. A guiding rack a1 is provided in the telescopic cavity a, and the follower wheel 112 meshes with the guiding rack a1. In specific applications, the wheel shaft 111 is connected to the second gear 224. When the second gear 224 rotates, the wheel shaft 111 rotates and drives the follower wheel 112 to rotate. The follower wheel 112 moves along the guiding gear a1, and the telescopic panel 1 is telescoped or retracted into the telescopic cavity a. By making the moving assembly 11 include the follower wheel 112 and providing a guiding gear in the telescopic cavity a, the accuracy and reliability of the telescoping of the telescopic panel 1 can be ensured.

[0048] According to an embodiment of the present utility model, a guiding assembly a2 is provided on the bottom plate or both side wall surfaces of the telescopic cavity a, and the guiding assembly a2 is connected to the telescopic panel 1. The extending direction of the guiding assembly a2 is consistent with the telescoping direction of the telescopic panel 1. The guiding assembly a2 can guide the movement process of the telescopic panel 1, prevent the telescopic panel 1 from deviating from the preset movement track, and improve the movement stability of the telescopic panel 1.

[0049] Please refer to Figures 4 to 6 , the present utility model also discloses a range hood, which adopts the above-mentioned telescopic panel assembly. The range hood of the present utility model includes a range hood main body 3, and the range hood main body 3 has a telescopic cavity a. The driving assembly 2 drives the telescopic panel 1 to extend or retract into the telescopic cavity a.

[0050] In the range hood of the utility model, when the range hood is started, the driving assembly 2 is started, the driving assembly 2 drives the moving assembly 11 to move, and the moving assembly 11 drives the telescopic panel 1 to extend out of the telescopic inner cavity a; when the range hood is turned off, the driving assembly 2 drives the moving assembly 11 to move, and the moving assembly 11 drives the telescopic panel 1 to retract into the telescopic inner cavity a. By utilizing the motion characteristics of the crank-connecting rod mechanism, after the motor drives the first connecting rod 221 to rotate a preset stroke, the rotation direction of the first gear 223 can be synchronously changed once through the second connecting rod 222, so that the rotation direction of the second gear 224 meshing with the first gear 223 will also change, and thus the motion direction of the moving assembly 11 connected to the second gear 224 will also change, and then the extension / retraction state of the telescopic panel 1 can be switched without changing the direction of the motor; since the motor does not need to repeatedly change the driving direction, the loss is small, the driving process is more stable, and the stability of the telescopic process of the telescopic panel 1 can be improved.

[0051] According to one embodiment of the utility model, a wind curtain assembly and / or a PM2.5 detection module and / or a lighting assembly are arranged in the installation cavity of the telescopic panel 1, and a wind curtain air inlet 12 and a wind curtain air outlet 13 corresponding to the wind curtain assembly, and / or a detection air hole 14 corresponding to the PM2.5 detection module, and / or a lighting window 15 corresponding to the lighting assembly are arranged on the telescopic panel 1. When the telescopic panel 1 extends out of the telescopic inner cavity a, the wind curtain air inlet 12 and the wind curtain air outlet 13 of the wind curtain assembly are moved out of the telescopic inner cavity a; or / and the detection air hole 14 of the PM2.5 detection module is moved out of the telescopic inner cavity a; or / and the lighting window 15 is moved out of the telescopic inner cavity a. When the wind curtain assembly is started, the wind curtain assembly sucks air through the wind curtain air inlet 12, and exhausts air downward through the wind curtain air outlet 13 to form a wind curtain. The PM2.5 detection module sucks air through the detection air hole 14 to detect the PM2.5 concentration in the air, so as to feedback the purification effect of the oil fume when the range hood is working. The lighting component transmits light downward through the lighting window 15, so that the user can observe the ingredients being cooked. After the user finishes cooking, the air curtain component is closed, the PM2.5 detection module is closed, the lighting component is closed, and the driving component 2 drives the telescopic panel 1 to retract into the telescopic inner cavity a. After the telescopic panel 1 is completely retracted into the telescopic inner cavity a, the driving component 2 stops moving.

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A telescopic panel assembly for a range hood, characterized in that: include: Telescopic inner cavity (a); A telescopic panel (1) is slidably connected to the telescopic inner cavity (a) and is provided with a moving component (11); A driving assembly (2) is arranged in the telescopic inner cavity (a), comprising a driving member (21) and a transmission assembly (22), wherein the driving member (21) is a motor, and the transmission assembly (22) comprises a first connecting rod (221), a second connecting rod (222), a first gear (223) and a second gear (224), wherein the first end of the first connecting rod (221) is connected to the output end of the driving member (21), the second end of the first connecting rod (221) is connected to the first end of the second connecting rod (222), the second end of the second connecting rod (222) is rotationally connected to the first gear (223), the second gear (224) is meshed with the first gear (223), the central axis of the first gear (223) is rotationally connected to the telescopic inner cavity (a), and the second gear (224) is transmission-connected to the moving assembly (11).

2. The telescopic panel assembly according to claim 1, characterized in that: The direction of rotation of the first connecting rod (221) driven by the motor remains unchanged, the first connecting rod (221) pulls the second connecting rod (222) to rotate, and the rotation direction of the second connecting rod (222) changes once every half turn of the first connecting rod (221).

3. The telescopic panel assembly according to claim 1, characterized in that: The first connecting rod (221) has a first extreme position and a second extreme position. In the first extreme position, the first end of the first connecting rod (221) is located between the first end and the second end of the second connecting rod (222); in the second extreme position, the second end of the first connecting rod (221) is located between the first end of the first connecting rod (221) and the second end of the second connecting rod (222). The first connecting rod (221) rotates half a circle with the output end of the motor as the center, from the first extreme position to the second extreme position or from the second extreme position to the first extreme position.

4. The telescopic panel assembly according to claim 3, characterized in that: After the second connecting rod (222) rotates to the first extreme position / the second extreme position, the telescopic panel (1) extends out of / retracts into the telescopic inner cavity (a), and the driving member (21) stops starting. When the driving member (21) starts again, the rotation direction of the first connecting rod (221) remains unchanged, the second connecting rod (222) swings in the opposite direction, and drives the second gear (224) to rotate in the opposite direction. The second gear (224) drives the moving component (11) to move in the opposite direction and causes the telescopic panel (1) to retract / extend into the telescopic inner cavity.

5. The telescopic panel assembly according to claim 3, characterized in that: In the first extreme position / the second extreme position, the second end of the second connecting rod (222) is located below the center of the second gear (224).

6. The telescopic panel assembly according to claim 5, characterized in that: The torque M of the second connecting rod (222) is FR2sinθ; F is the force applied by the first connecting rod (221) to the second end of the second connecting rod (222); θ is the angle between the first connecting rod (221) and the second connecting rod (222); when the first connecting rod (221) is at the second extreme position, the angle between the first connecting rod (221) and the second connecting rod (222) is 180°; when the first connecting rod (221) moves from the second extreme position to the first extreme position, the angle between the first connecting rod (221) and the second connecting rod (222) gradually decreases; the second connecting rod (222) drives the second gear (224) to first accelerate and then decelerate.

7. The telescopic panel assembly according to claim 6, characterized in that: When moving from the second extreme position to the first extreme position, when the angle θ between the first connecting rod (221) and the second connecting rod (222) decreases to 45°, the motor stops for time t1 and then continues to drive the first connecting rod (221) to move to the first extreme position.

8. The telescopic panel assembly according to claim 1, characterized in that: The moving assembly (11) comprises a wheel axle (111) rotatably connected to the telescopic panel (1) and a follower wheel (112) disposed on the wheel axle (111); the wheel axle (111) is connected to an output end of the transmission assembly (22); a guide rack (a1) is disposed in the telescopic inner cavity (a); and the follower wheel (112) is meshed with the guide rack (a1).

9. The telescopic panel assembly according to claim 1, characterized in that: A guide component (a2) is provided on the bottom plate or the two side walls of the telescopic inner cavity (a), and the guide component (a2) is connected to the telescopic panel (1).

10. A range hood, using the telescopic panel assembly according to any one of claims 1 to 8, characterized in that: It comprises a range hood body (3), the range hood body (3) having the telescopic inner cavity (a), and the drive assembly (2) drives the telescopic panel (1) to extend or retract into the telescopic inner cavity (a).

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