Lifting panel device and range hood

Abstract

The utility model relates to the field of range hoods, in particular to a lifting panel device and a range hood. The lifting panel device comprises a smoke barrier and a self-locking assembly; the self-locking assembly comprises a fixed block, a sliding block, a limiting mechanism, a matching mechanism and two clamping jaws. A buckle is arranged at the bottom of the smoke barrier; the two clamping jaws are arranged on the sliding block; the self-locking assembly has a locking state and an unlocking state; in the locking state, the two clamping jaws are close to each other to lock the buckle, and the limiting mechanism is connected with the matching mechanism to enable the clamping jaws to keep locking the buckle; and in the unlocking state, the limiting mechanism is separated from the matching mechanism, so that the two clamping jaws are far away from each other to release the buckle. In this way, the smoke barrier can be assembled, disassembled and maintained conveniently and quickly.

Description

Technical Field

[0001] The utility model relates to the field of range hoods, and in particular to a lifting panel device and a range hood. Background Art

[0002] With the development of consumption trends and the promotion of the industry, down-type range hoods that are closely matched with lower cabinets are continuously introduced to the market. This type of range hood is popular with consumers because of its good cabinet integration and the space saved on the upper cabinets.

[0003] However, in order to hide the smoke inlet, this type of range hood adopts a complex lifting combined electric structure. The lifting smoke shield used to improve the smoke extraction effect will be condensed with oil after long-term use and is not easy to disassemble and clean. Utility Model Content

[0004] The purpose of the utility model includes providing a lifting panel device and a range hood, which can conveniently and quickly realize the installation, removal and maintenance operations of the smoke shield.

[0005] The embodiment of the present utility model can be implemented as follows:

[0006] In a first aspect, the present invention provides a lifting panel device, comprising:

[0007] Smoke dampers and self-locking assemblies;

[0008] The self-locking assembly includes a fixed block, a sliding block, a limiting mechanism, a matching mechanism and two claws;

[0009] A buckle is provided at the bottom of the smoke baffle;

[0010] The fixed block has a groove; along the depth direction of the groove, the sliding block is movably arranged in the groove;

[0011] Both claws are arranged on the sliding block;

[0012] The self-locking assembly has a locked state and an unlocked state; when in the locked state, the two claws approach each other to lock the buckle, and the limiting mechanism is connected to the matching mechanism to keep the claws locked to the buckle;

[0013] When in the unlocked state, the limiting mechanism is separated from the matching mechanism, so that the two claws move away from each other and the buckle is released.

[0014] In an optional embodiment, the self-locking assembly further includes a first elastic member; the first elastic member is connected to at least one claw, and the first elastic member provides an elastic force that keeps the two claws away from each other;

[0015] When in the unlocked state, the limiting mechanism is separated from the matching mechanism, so that the two claws move away from each other under the elastic force of the first elastic member to release the buckle.

[0016] In an optional embodiment, the limiting mechanism includes a stop rod, and the matching mechanism includes a first limit block; the top of the stop rod is movably arranged on the sliding block, and the bottom of the stop rod has a stop portion; the first limit block is provided with a first limit groove;

[0017] In the locked state, the stop portion is clamped in the limit groove, the claws are both located in the groove, and the claws are close to each other to lock the buckle;

[0018] In the unlocked state, the stop portion is disengaged from the limiting groove, the claws are located outside the groove, and the two claws are kept away from each other so that the buckle can be disengaged and released.

[0019] In an optional embodiment, the self-locking assembly further includes a second elastic member; one end of the second elastic member is disposed on the sliding block, and the other end is disposed at the bottom of the groove; the second elastic member provides an elastic force that keeps the sliding block away from the bottom of the groove and enables the claw to extend out of the groove;

[0020] In the locked state, the sliding block overcomes the elastic force of the second elastic member so that the stop portion is retained in the limiting groove;

[0021] In the released state, the stop portion is separated from the limiting groove, and the sliding block extends out of the groove under the action of the elastic force of the second elastic member.

[0022] In an optional embodiment, the self-locking assembly includes a first limit block disposed in the groove;

[0023] The top of the first limit block has a first inclined surface, and the bottom of the first limit block has a limiting groove; along the extension direction of the first inclined surface, from the unlocked state to the locked state, the stop portion can move along the bottom end of the first inclined surface to the limiting groove, and the second elastic member can make the stop portion press against the limiting groove.

[0024] In an optional embodiment, the self-locking assembly includes a second limiting block disposed in the groove; the top of the second limiting block has a second inclined surface;

[0025] The bottom of the first limiting block has a first matching surface;

[0026] From the locked state to the unlocked state, the stop portion can move downward along the second inclined surface to the bottom end of the second inclined surface, and move upward along the first matching surface until the claw is located outside the groove.

[0027] In an optional embodiment, the buckle includes a rod portion and a ball portion; the ball portion is arranged at the bottom of the rod portion; the diameter of the ball portion is larger than the rod diameter of the rod portion;

[0028] The claws have arc grooves, and the arc grooves of the two claws are arranged opposite to each other to form a clamping space, and a notch is formed at the top of the clamping space;

[0029] The holding space can accommodate the ball;

[0030] In the locked state, the size of the notch is greater than or equal to the rod diameter of the rod portion and smaller than the diameter of the ball portion;

[0031] In the unlocked state, the size of the notch is larger than the diameter of the ball.

[0032] In an optional embodiment, the lifting panel device further includes an anti-drop sheet and a fixing seat; the fixing block is disposed in the fixing seat; the fixing seat has a card slot, and both sides of the smoke shield are slidably disposed in the card slot;

[0033] The anti-drop sheet is arranged on the top of the card slot to close the notch of the card slot.

[0034] In an optional embodiment, the lifting panel device further includes a third elastic member;

[0035] One end of the third elastic member is arranged on the fixing seat, and the other end is connected to the smoke baffle. The third elastic member provides elastic force to move the smoke baffle toward the fixing seat to escape from the slot.

[0036] In a second aspect, the present invention provides a range hood, which includes the lifting panel device of any one of the aforementioned embodiments.

[0037] The beneficial effects of the embodiments of the present invention include, for example:

[0038] The lifting panel device of this solution includes a smoke damper and a self-locking component. The self-locking component can realize the locking and unlocking of the buckle, thereby facilitating the loading and unloading and maintenance of the smoke damper; and the cooperation of the limiting mechanism and the matching mechanism can ensure that the self-locking component remains in a stably locked state. In this way, on the one hand, it ensures that the self-locking component can efficiently lock and release the smoke damper, and on the other hand, it can also ensure the stability of the locked state and the unlocked state respectively, that is, it facilitates the smoothness of the installation process of the smoke damper and the stability of the connection. In summary, such a lifting panel device can switch the smoke damper between the unlocked state and the locked state through the self-locking component, so as to facilitate the loading and unloading of the smoke damper, and thus facilitate the maintenance and care of the smoke damper. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0040] Figure 1 This is a schematic structural diagram of a lifting panel device according to an embodiment of the present utility model;

[0041] Figure 2 This is a structural diagram of the self-locking assembly of the lifting panel device according to an embodiment of the present utility model;

[0042] Figure 3 This is a structural schematic diagram of the self-locking component of the lifting panel device in the unlocked state according to an embodiment of the present utility model;

[0043] Figure 4 This is a structural schematic diagram of the self-locking component of the lifting panel device in the embodiment of the utility model in the locked state;

[0044] Figure 5 This is a structural schematic diagram of the lifting panel device according to another embodiment of the present invention from another perspective;

[0045] Figure 6 This is a partially enlarged structural diagram of the lifting panel device according to an embodiment of the present utility model;

[0046] Figure 7 This is a schematic structural diagram of the lifting panel device according to an embodiment of the utility model, in which the smoke shield is removed in the unlocked state.

[0047] Icons: 10-lifting panel device; 11-fixed seat; 11a-slot; 12-smoke shield; 13-clip; 13a-rod; 13b-ball; 14-self-locking assembly; 15-anti-slip sheet; 100-fixed block; 110-groove; 200-sliding block; 300-stop rod; 310-stop part; 410-first elastic member; 420-second elastic member; 430-third elastic member; 500-claw; 501-holding space; 502-notch; 510-connecting part; 520-holding part; 522-arc groove; 600-pin; 700-first limiting block; 710-first inclined surface; 711-limiting groove; 720-first mating surface; 800-second limiting block; 810-second inclined surface. DETAILED DESCRIPTION

[0048] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0050] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0051] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does 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, it cannot be understood as a limitation on the present invention.

[0052] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0053] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention can be combined with each other.

[0054] Please refer to Figure 1 and Figure 2 , this embodiment provides a lifting panel device 10, including a smoke baffle 12 and a self-locking assembly 14;

[0055] The self-locking assembly 14 includes a fixed block 100, a sliding block 200, a limiting mechanism, a matching mechanism and two claws 500;

[0056] A buckle 13 is provided at the bottom of the smoke baffle 12;

[0057] The fixed block 100 has a groove 110; along the depth direction of the groove 110, the sliding block 200 is movably disposed in the groove 110;

[0058] The two claws 500 are both provided on the sliding block 200;

[0059] The self-locking assembly 14 has a locked state and an unlocked state; when in the locked state, the two claws 500 approach each other to lock the buckle 13, and the limiting mechanism is connected to the matching mechanism so that the claws 500 remain locked to the buckle 13;

[0060] When in the unlocked state, the limiting mechanism is separated from the matching mechanism, so that the two claws 500 move away from each other and the buckle 13 is released.

[0061] The self-locking component 14 of the lifting panel device 10 of this solution can realize the locking and unlocking of the buckle 13, thereby facilitating the loading and unloading and maintenance of the smoke damper 12; and the limiting mechanism and the matching mechanism cooperate to ensure that the self-locking component 14 remains in a stably locked state. In this way, on the one hand, it ensures that the self-locking component 14 can efficiently lock and release the smoke damper 12, and on the other hand, it can also ensure the stability of the locked state and the unlocked state respectively, that is, it facilitates the smoothness of the installation process of the smoke damper 12 and the stability of the connection. In summary, such a lifting panel device 10 can switch the smoke damper 12 between the unlocked state and the locked state through the self-locking component 14, so as to facilitate the loading and unloading of the smoke damper 12, and thus facilitate the maintenance and care of the smoke damper 12.

[0062] Please continue reading Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 , the detailed structure of the lifting panel device 10 is as follows:

[0063] from Figure 2 、 Figure 3 、 Figure 4 、 Figure 6 It can be seen that in an optional embodiment, the self-locking assembly 14 also includes a first elastic member 410; the first elastic member 410 is connected to at least one claw 500, and the first elastic member 410 provides an elastic force that keeps the two claws 500 away from each other; when in the unlocked state, the limiting mechanism is separated from the mating mechanism, so that the two claws 500 are moved away from each other under the elastic force of the first elastic member 410 and release the buckle 13.

[0064] The first elastic member 410 enables the two claws 500 to be kept away from each other, thereby ensuring that the smoke shield 12 can be easily assembled and disassembled when the claws 500 are in the unlocked state.

[0065] In an optional embodiment, the limiting mechanism includes a stop rod 300, and the cooperating mechanism includes a first limit block 700; the top of the stop rod 300 is movably arranged on the sliding block 200, and the bottom of the stop rod 300 has a stop portion 310; the first limit block 700 is provided with a first limit groove 711; in the locked state, the stop portion 310 is clamped in the limit groove 711, and the claws 500 are both located in the groove 110, and the claws 500 are close to each other to lock the buckle 13; in the unlocked state, the stop portion 310 is disengaged from the limit groove 711, and the claws 500 are located outside the groove 110, and the two claws 500 remain away from each other so that the buckle 13 can be disengaged and release the buckle 13.

[0066] The cooperation between the stop rod 300 and the limiting groove 711 can ensure that the self-locking assembly 14 maintains a stable locking state. The outer walls of the two claws 500 are both abutted against the groove 110 so that the two claws 500 are close to each other, which can ensure that the claws 500 lock the buckle 13.

[0067] In an optional embodiment, the self-locking assembly 14 also includes a second elastic member 420; one end of the second elastic member 420 is arranged on the sliding block 200, and the other end is arranged at the bottom of the groove 110; the second elastic member 420 provides an elastic force that keeps the sliding block 200 away from the bottom of the groove 110 and the claw 500 can extend out of the groove 110; in the locked state, the sliding block 200 overcomes the elastic force of the second elastic member 420 so that the stop portion 310 is clamped in the limiting groove 711; in the released state, the stop portion 310 disengages from the limiting groove 711, and the sliding block 200 extends out of the groove 110 under the action of the elastic force of the second elastic member 420.

[0068] The second elastic member 420 enables the sliding block 200 to have an elastic force to move away from the bottom of the groove 110 so as to be separated from the groove 110 , thereby ensuring the stability of the unlocked state of the claw 500 .

[0069] In an optional embodiment, the self-locking assembly 14 includes a first limit block 700 arranged in the groove 110; the top of the first limit block 700 has a first inclined surface 710, and the bottom of the first limit block 700 has a limit groove 711; along the extension direction of the first inclined surface 710, from the unlocked state to the locked state, the stop portion 310 can move along the bottom end of the first inclined surface 710 to the limit groove 711, and the second elastic member 420 can make the stop portion 310 press against the limit groove 711.

[0070] The first inclined surface 710 here serves as a guide surface for guiding the stop portion 310 of the stop rod 300 , and utilizes its own gravity to smoothly slide into the limiting groove 711 to maintain a locked state.

[0071] In an optional embodiment, the self-locking assembly 14 includes a second limit block 800 arranged in the groove 110; the top of the second limit block 800 has a second inclined surface 810; the bottom of the first limit block 700 has a first mating surface 720; from the locked state to the unlocked state, the stop portion 310 can move downward along the second inclined surface 810 to the bottom end of the second inclined surface 810, and move upward along the first mating surface 720 until the claw 500 is located outside the groove 110.

[0072] Specifically, the top end of the second inclined surface 810 is opposite to the limiting groove 711, the bottom end of the second inclined surface 810 extends in a direction away from the first inclined surface 710, and the bottom end of the first mating surface 720 is located near the bottom end of the second inclined surface 810; the top end of the first mating surface 720 extends in a direction close to the first inclined surface 710; from the locked state to the unlocked state, the stop portion 310 can move toward the second limiting block 800 to move downward along the second inclined surface 810 to the bottom end of the second inclined surface 810, and move toward the first limiting block 700 to move upward along the first mating surface 720 until the claw 500 is located outside the groove 110.

[0073] The second inclined surface 810 and the first matching surface 720 here enable the stop portion 310 of the stop rod 300 to smoothly disengage from the first limit block 700 and the second limit block 800 after disengaging from the limit groove 711, so that the sliding block 200 can drive the claw 500 to disengage from the groove 110 and remain unlocked.

[0074] In an optional embodiment, the buckle 13 includes a rod portion 13a and a ball portion 13b; the ball portion 13b is disposed at the bottom of the rod portion 13a; the diameter of the ball portion 13b is larger than the diameter of the rod portion 13a; the claws 500 each have an arcuate groove 522, and the arcuate grooves 522 of the two claws 500 are arranged opposite to each other to form a holding space 501, and a notch 502 is formed at the top of the holding space 501; the holding space 501 is capable of accommodating the ball portion 13b;

[0075] In the locked state, the size of the notch 502 is greater than or equal to the rod diameter of the rod portion 13a and smaller than the diameter of the ball portion 13b; in the unlocked state, the size of the notch 502 is greater than the diameter of the ball portion 13b.

[0076] That is, in the locked state, the diameter of the circular retaining space 501 is comparable to the diameter of the ball portion 13b, while the diameter of the notch 502 is less than or equal to the diameter of the rod portion 13a. In other words, the notch 502 provides a passage for the buckle 13 to enter and exit the claw 500, while the retaining space 501 provides a position for locking the ball portion 13b. It will be readily understood that in other embodiments of the present invention, the claw 500 may have other shapes and structures; this is merely an example.

[0077] Furthermore, in an optional embodiment, the claw 500 includes a connecting portion 510 and a holding portion 520; the connecting portion 510 is rotatably connected to the sliding block 200, and the holding portion 520 is spaced away from the sliding block 200; in the locked state, the holding portions 520 of the two claws 500 remain close to each other; in the unlocked state, the holding portions 520 of the two claws 500 remain spaced apart. In other words, the claw 500 and the sliding block 200 are rotatably engaged, and this arrangement can reduce the space occupied by the claw 500 when it moves. It is understood that in other embodiments, the claw 500 and the sliding block 200 can also be slidably engaged, etc. This is merely an example.

[0078] In this embodiment, the connecting portions 510 of the two claws 500 are rotatably mounted on the sliding block 200 via a common pin 600. The first elastic members 410 are respectively connected to the two claws 500. This further reduces the space occupied by the claws 500 and the number of first elastic members 410. The first elastic members 410 may be retaining springs.

[0079] See also Figure 1 、 Figure 5 、 Figure 6 and Figure 7 In an optional embodiment, the lifting panel device 10 further includes an anti-slip sheet 15 and a fixing seat 11; the fixing block 100 is arranged in the fixing seat 11; the fixing seat 11 has a slot 11a, and both sides of the smoke shield 12 are slidably arranged in the slot 11a; the anti-slip sheet 15 is arranged at the top of the slot 11a to close the notch of the slot 11a.

[0080] When the smoke shield 12 is clamped by the self-locking assembly 14, the anti-drop sheet 15 installed on the fixing seat 11 presses the smoke shield 12 to prevent the smoke shield 12 from suddenly lifting up and causing damage to the flip panel when the self-locking assembly 14 is not clamped.

[0081] In an optional embodiment, the lifting panel device 10 further includes a third elastic member 430. One end of the third elastic member 430 is disposed on the fixing base 11, and the other end is connected to the smoke shield 12. The third elastic member 430 provides an elastic force that causes the smoke shield 12 to move toward the fixing base 11 and disengage from the retaining slot 11a. The third elastic member 430 may be a compression spring.

[0082] When cleaning the smoke shield 12, unscrew the anti-slip sheet 15 and press the smoke shield 12. At this time, the smoke shield 12 is lifted up by the thrust provided by the third elastic member 430, preventing the smoke shield 12 from being solidified by grease and difficult to remove.

[0083] During use, the claw 500 is fixed to the sliding block 200 via the pin 600. The claw 500 is opened in its natural state by the retaining spring. The sliding block 200 is disposed inside the fixed block 100 and can move up and down along the depth direction of the groove 110. The top of the stop rod 300 is rotatably mounted on the sliding block 200, and the bottom of the stop rod 300 can swing horizontally. A second elastic member 420 for compressing the spring is provided at the bottom of the sliding block 200. A limiting groove 711 is provided on the first limit block 700.

[0084] Before the buckle 13 makes contact, the self-locking assembly 14 pushes up the sliding block 200 through the second elastic member 420, so that the claw 500 is in an expanded state;

[0085] When the buckle 13 is pressed down and contacts the claw 500, the second elastic member 420 is compressed and the sliding block 200 moves downward in the fixed block 100. At this time, the stop rod 300 contacts the limiting groove 711 on the fixed block 100, and the stop part 310 at the bottom of the stop rod 300 is stuck in the groove 110 of the limiting groove 711. At this time, the claw 500 tightens to hold the buckle 13, thereby playing a self-locking role.

[0086] When the buckle 13 is pressed again, the stop rod 300 falls off from the limiting groove 711, and under the elastic force of the second elastic member 420, the sliding block 200 is pushed up. At this time, the claw 500 opens again, releasing the buckle 13, making it easier to disassemble the lifting smoke shield 12.

[0087] In a second aspect, the present invention provides a range hood, which includes the lifting panel device 10 according to any one of the aforementioned embodiments.

[0088] In summary, the embodiment of the present invention provides a lifting panel device 10 and a range hood, which have at least the following advantages:

[0089] 1. After removing the panel, you can disassemble the flip glass assembly, which has the advantages of simple structure and quick maintenance.

[0090] 2. The smoke shield 12 adopts a compression spring and a self-locking clamping structure, which prevents the smoke shield 12 from being condensed by grease and is easy to remove.

[0091] 3. The smoke baffle 12 is provided with an anti-slip piece 15 to press it tightly, so as to prevent the smoke baffle 12 from being lifted up and damaging the flip panel due to self-locking failure.

[0092] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to them. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this utility model should be included in the scope of protection of the present utility model. Therefore, the scope of protection of the present utility model should be based on the scope of protection of the claims.

Claims

1. A lifting panel device, characterized in that: include: A smoke baffle (12) and a self-locking assembly (14); The self-locking assembly (14) comprises a fixed block (100), a sliding block (200), a limiting mechanism, a matching mechanism and two claws (500); A buckle (13) is provided at the bottom of the smoke baffle (12); The fixed block (100) has a groove (110); along the depth direction of the groove (110), the sliding block (200) is movably arranged in the groove (110); The two claws (500) are both arranged on the sliding block (200); the self-locking assembly (14) has a locked state and an unlocked state; when in the locked state, the two claws (500) approach each other to lock the buckle (13), and the limiting mechanism is connected to the matching mechanism so that the claws (500) keep locking the buckle (13); When in the unlocked state, the limiting mechanism is separated from the matching mechanism, so that the two claws (500) move away from each other and release the buckle (13).

2. The lifting panel device according to claim 1, characterized in that: The self-locking assembly (14) further includes a first elastic member (410); the first elastic member (410) is connected to at least one claw (500), and the first elastic member (410) provides an elastic force that keeps the two claws (500) away from each other; When in the unlocked state, the limiting mechanism is separated from the matching mechanism, so that the two claws (500) move away from each other under the elastic force of the first elastic member (410) to release the buckle (13).

3. The lifting panel device according to claim 1, wherein: The limiting mechanism includes a stop rod (300), and the matching mechanism includes a first limit block (700); the top of the stop rod (300) is movably arranged on the sliding block (200), and the bottom of the stop rod (300) has a stop portion (310); the first limit block (700) is provided with a first limit groove (711); In the locked state, the stop portion (310) is held in the limiting groove (711), the claws (500) are both located in the groove (110), and the claws (500) are close to each other to lock the buckle (13); In the unlocked state, the stop portion (310) is disengaged from the limiting groove (711), the claws (500) are located outside the groove (110), and the two claws (500) are kept away from each other so that the buckle (13) can be disengaged and the buckle (13) is released.

4. The lifting panel device according to claim 3, characterized in that: The self-locking assembly (14) further includes a second elastic member (420); one end of the second elastic member (420) is disposed on the sliding block (200), and the other end is disposed at the bottom of the groove (110); the second elastic member (420) provides an elastic force that enables the sliding block (200) to remain away from the bottom of the groove (110) and the claw (500) to extend out of the groove (110); In the locked state, the sliding block (200) overcomes the elastic force of the second elastic member (420) so that the stop portion (310) is retained in the limiting groove (711); In the released state, the stop portion (310) is disengaged from the limiting groove (711), and the sliding block (200) extends out of the groove (110) under the action of the elastic force of the second elastic member (420).

5. The lifting panel device according to claim 4, characterized in that: The self-locking assembly (14) includes a first limiting block (700) arranged in the groove (110); The top of the first limiting block (700) has a first inclined surface (710), and the bottom of the first limiting block (700) has the limiting groove (711); along the extension direction of the first inclined surface (710), from the unlocked state to the locked state, the stopping portion (310) can move along the bottom end of the first inclined surface (710) to the limiting groove (711), and the second elastic member (420) can make the stopping portion (310) press against the limiting groove (711).

6. The lifting panel device according to claim 5, characterized in that: The self-locking assembly (14) comprises a second limiting block (800) disposed in the groove (110); the top of the second limiting block (800) has a second inclined surface (810); The bottom of the first limiting block (700) has a first matching surface (720); From the locked state to the unlocked state, the stop portion (310) can move downward along the second inclined surface (810) to the bottom end of the second inclined surface (810), and move upward along the first mating surface (720) until the claw (500) is located outside the groove (110).

7. The lifting panel device according to claim 1, characterized in that: The buckle (13) comprises a rod portion (13a) and a ball portion (13b); the ball portion (13b) is arranged at the bottom of the rod portion (13a); the diameter of the ball portion (13b) is larger than the rod diameter of the rod portion (13a); The clamping claws (500) each have an arc-shaped groove (522), and the arc-shaped grooves (522) of the two clamping claws (500) are arranged opposite to each other to form a clamping space (501), and a notch (502) is formed at the top of the clamping space (501); The holding space (501) is capable of accommodating the ball portion (13b); In the locked state, the size of the notch (502) is greater than or equal to the diameter of the rod portion (13a) and smaller than the diameter of the ball portion (13b); In the unlocked state, the size of the notch (502) is larger than the diameter of the ball portion (13b).

8. The lifting panel device according to claim 1, wherein: The lifting panel device further includes an anti-slip sheet (15) and a fixing seat (11); the fixing block (100) is arranged in the fixing seat (11); The fixing seat (11) is provided with a card slot (11a), and both sides of the smoke shield (12) are slidably arranged in the card slot (11a); The anti-drop sheet (15) is arranged on the top of the card slot (11a) to close the notch of the card slot (11a).

9. The lifting panel device according to claim 8, characterized in that: The lifting panel device further includes a third elastic member (430); One end of the third elastic member (430) is arranged on the fixing seat (11), and the other end is connected to the smoke shield (12), and the third elastic member (430) provides an elastic force that causes the smoke shield (12) to move toward the fixing seat (11) to disengage from the slot (11a).

10. A range hood, characterized in that: The range hood comprises the lifting panel device according to any one of claims 1 to 9.

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