Opening and closing self-locking device and range hood

Abstract

The utility model provides an opening and closing self-locking device and a range hood. The opening and closing self-locking device comprises a rotating part, a fixed part and a locking assembly, wherein the fixed part is rotationally connected with the rotating part, and the fixed part is provided with a limiting hole extending around the rotating axis of the rotating part. The locking assembly is installed on the rotating piece, and when the locking assembly is in a locking state, the locking assembly is matched with the limiting hole in a limiting mode, so that the rotating piece and the fixed piece are relatively fixed; when the locking assembly is in an unlocking state, the locking assembly is separated from the limiting hole, and the rotating piece can rotate relative to the fixed piece. According to the opening and closing self-locking device, the rotating part can be stopped and self-locked at any angle during opening and closing movement, the user experience is improved, meanwhile, the opening and closing self-locking device is of an integrated structure, noise caused by hard collision between a part connected with the rotating part and a part connected with the fixed part is reduced, and the mute effect is achieved.

Description

Technical Field

[0001] The utility model relates to the field of range hoods, in particular to an opening and closing self-locking device and a range hood. Background Art

[0002] A range hood is a kitchen appliance that purifies the kitchen environment. It is installed above the kitchen stove and can quickly extract the waste from stove combustion and the fumes that are harmful to the human body generated during cooking and discharge them outdoors. At the same time, it condenses and collects the fumes to reduce pollution, purify the air, and has anti-toxic and explosion-proof safety protection functions. In order to simultaneously meet the effect of absorbing fumes over a large area when the range hood is in use and occupy a small space when not in use, the baffle of the range hood is designed to be openable and closable. However, in the prior art, the baffle of the range hood is mainly opened and closed by a simple latch and lock buckle method, which makes the baffle unable to self-lock at any angle; if the self-locking function is to be realized, an automatic or electric push rod structure must be used, which is relatively expensive. Utility Model Content

[0003] The first technical problem solved by the present application is to provide an opening and closing self-locking device, which can effectively realize the opening and closing self-locking device to pause and self-lock at any angle during the opening and closing movement, thereby improving the user experience.

[0004] The second technical problem solved by the present application is to provide a range hood which can effectively realize the self-locking of the baffle at any angle during opening and closing, so as to facilitate the user to clean and adjust the range hood effect and improve the shaking and noise problems of the baffle during use.

[0005] The first technical problem mentioned above is solved by the following technical solution:

[0006] An opening and closing self-locking device, comprising:

[0007] Rotating parts;

[0008] A fixing member, the fixing member being rotatably connected to the rotating member, the fixing member being provided with a limiting hole extending around a rotation axis of the rotating member; and

[0009] A locking assembly is installed on the rotating member. When the locking assembly is in a locked state, the locking assembly cooperates with the limiting hole to make the rotating member and the fixed member relatively fixed; when the locking assembly is in an unlocked state, the locking assembly disengages from the limiting hole, and the rotating member can rotate relative to the fixed member.

[0010] The opening and closing self-locking device of the present application has the following beneficial effects compared with the background technology:

[0011] When the opening and closing self-locking device in the above embodiment is used, the limiting cooperation between the locking assembly and the limiting hole is released, so that the locking assembly can rotate on the fixed part with the rotating part, ensuring that the rotating part can rotate to a preset position relative to the fixed part. When the rotating part rotates to the preset position, the locking assembly is in a locked state, and the locking assembly and the limiting hole are limited, so that the rotating part is connected to the locking assembly and the fixed part as a whole, ensuring that the rotating part will not shake during use, thereby improving the reliability and stability of the opening and closing self-locking device. Compared with the simple latch plus lock buckle method in the prior art, the rotating part in the present application can pause and self-lock at any angle during the opening and closing movement, which improves the user experience. At the same time, the opening and closing self-locking device is an integrated structure, which reduces the noise of the parts connected to the rotating part and the parts connected to the fixed part, thereby achieving a silent effect.

[0012] The technical solution is further described below:

[0013] In one embodiment, the locking assembly includes an elastic member and a locking member, and the elastic member is connected to the locking member. When the locking assembly is in a locked state, the elastic member drives the locking member to make the locking member and the limiting hole cooperate with each other; when the locking assembly is in an unlocked state, the locking member disengages from the limiting hole and squeezes the elastic member.

[0014] In one embodiment, the elastic member is configured as a spring, the locking member includes a resistance portion and a sleeve portion, the locking assembly also includes an axle pin, the axle pin is mounted on the rotating member, the sleeve portion is slidably sleeved on one end of the axle pin close to the limiting hole, the spring is located between the sleeve portion and the rotating member in a compressed state, the resistance portion is limitedly engaged with the limiting hole, and the outer diameter of the resistance portion gradually decreases in the direction away from the sleeve portion.

[0015] In one of the embodiments, the locking member further includes a pressing portion and a sliding portion, the pressing portion is connected to the resisting portion via the sliding portion, and the pressing portion and the resisting portion are located at two sides of the limiting hole.

[0016] In one embodiment, the rotating member is provided with a first connection part and a second connection part at intervals, and the fixed member is provided with a third connection part and a fourth connection part at intervals, the first connection part and the second connection part are both located between the third connection part and the fourth connection part, the first connection part is rotationally connected to the third connection part, and the second connection part is rotationally connected to the fourth connection part.

[0017] In one embodiment, the limiting hole is arranged on the third connecting part, the first connecting part is provided with a first mounting hole corresponding to the limiting hole, the second connecting part is provided with a second mounting hole corresponding to the first mounting hole, the locking assembly is passed through the first mounting hole and the second mounting hole, and can selectively cooperate with the limiting hole.

[0018] In one embodiment, the outer wall of the third connecting part is further provided with a accommodating hole, and along the sliding direction of the sliding part, the accommodating hole is connected with one side of the limiting hole, and the inner diameter of the accommodating hole is greater than or equal to the outer diameter of the sleeve part. The locking assembly also includes a limiting member, and the limiting member is installed on the outer wall of the sleeve part. When the locking assembly is in a certain locking state, one end of the sleeve part close to the interference part extends into the accommodating hole, and the limiting member is limitedly matched with the inner side wall of the first connecting part to prevent the sleeve part from escaping from the rotating part.

[0019] In one of the embodiments, an outer side wall of the sleeve portion is provided with a clamping groove, and the limiting member is configured as a clamping ring, and the clamping ring is clamped and matched with the clamping groove.

[0020] In one embodiment, the first connecting part is provided with a third mounting hole, the second connecting part is provided with a fourth mounting hole, the third connecting part is provided with a fifth mounting hole, and the fourth connecting part is provided with a sixth mounting hole, the axis of the third mounting hole, the axis of the fourth mounting hole, the axis of the fifth mounting hole and the axis of the sixth mounting hole are all located on the same straight line, and the opening and closing self-locking device also includes a first connecting member and a second connecting member, the first connecting member passes through the third mounting hole and the fifth mounting hole, and is rotatably matched with the third mounting hole and the fifth mounting hole, and the second connecting member passes through the fourth mounting hole and the sixth mounting hole, and is rotatably matched with the fourth mounting hole and the sixth mounting hole.

[0021] The above second technical problem is solved by the following technical solution:

[0022] A range hood comprises a range hood body, a baffle and the opening and closing self-locking device, wherein the fixing member is connected to the range hood body, and the rotating member is connected to the baffle.

[0023] The range hood of the present application has the following beneficial effects compared with the background technology:

[0024] When the range hood in the above embodiment is used, the limiting cooperation between the locking assembly and the limiting hole is released, so that the locking assembly can rotate on the fixed part with the rotating part, ensuring that the baffle can rotate to a preset position relative to the range hood body. When the baffle rotates to the preset position, the locking assembly is in a locked state, and the locking assembly and the limiting hole are limitedly matched, so that the rotating part can be connected with the locking assembly and the fixed part as a whole, ensuring that the baffle will not shake during use, thereby improving the reliability and stability of the range hood. Compared with the simple latch plus lock buckle method in the prior art, the baffle in the present application can pause and self-lock at any angle during the opening and closing movement, which is convenient for users to clean and adjust the oil absorption effect, and improves the user experience. At the same time, the opening and closing self-locking device is an integrated structure, which reduces the noise caused by the hard collision between the baffle and the range hood body, and achieves a silent effect. In addition, the opening and closing angle of the baffle can be further increased, so that the oil and fume absorption effect of the range hood is also increased synchronously, and the oil and fume absorption is cleaner. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] FIG1 is a schematic structural diagram of an opening and closing self-locking device in an open state according to an embodiment.

[0028] FIG. 2 is a cross-sectional view of the opening and closing self-locking device of FIG. 1 along the AA direction.

[0029] FIG. 3 is a schematic structural diagram of the opening and closing self-locking device of FIG. 1 in a closed state.

[0030] FIG. 4 is a cross-sectional view of the opening and closing self-locking device of FIG. 3 along the BB direction.

[0031] FIG. 5 is an exploded view of the opening and closing self-locking device of FIG. 1 .

[0032] FIG. 6 is a schematic structural diagram of a range hood baffle in an open state according to an embodiment.

[0033] FIG. 7 is a schematic structural diagram of the range hood baffle of FIG. 6 in a closed state.

[0034] Description of reference numerals:

[0035] 1. Range hood; 10. Opening and closing self-locking device; 20. Range hood body; 30. Baffle; 100. Rotating member; 110. First connecting part; 111. First mounting hole; 112. Third mounting hole; 120. Second connecting part; 121. Second mounting hole; 122. Fourth mounting hole; 130. Rotating seat; 131. Seventh mounting hole; 200. Fixing member; 210. Third connecting part; 211. Limiting hole; 212. Accommodating hole; 2 13. fifth mounting hole; 220. fourth connecting portion; 221. sixth mounting hole; 230. fixing seat; 231. eighth mounting hole; 300. locking assembly; 310. elastic member; 320. locking member; 321. sliding portion; 322. sleeve portion; 323. interference portion; 324. slot; 325. pressing portion; 330. axle pin; 340. limiting member; 341. snap ring; 410. first connecting member; 420. second connecting member. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0037] As shown in Fig. 1, Fig. 2 and Fig. 3, in one embodiment, a self-locking device 10 for opening and closing is provided, comprising a rotating member 100, a fixed member 200 and a locking assembly 300. The fixed member 200 is rotatably connected with the rotating member 100, and the fixed member 200 is provided with a limiting hole 211 extending around the rotation axis of the rotating member 100. The locking assembly 300 is mounted on the rotating member 100. When the locking assembly 300 is in a locked state, the locking assembly 300 is limitedly matched with the limiting hole 211, so that the rotating member 100 and the fixed member 200 are relatively fixed; when the locking assembly 300 is in an unlocked state, the locking assembly 300 is disengaged from the limiting hole 211, and the rotating member 100 can rotate relative to the fixed member 200.

[0038] When the opening and closing self-locking device 10 in the above embodiment is used, the limiting cooperation between the locking assembly 300 and the limiting hole 211 is released, so that the locking assembly 300 can rotate on the fixed member 200 with the rotating member 100, ensuring that the rotating member 100 can rotate to a preset position relative to the fixed member 200. When the rotating member 100 rotates to the preset position, the locking assembly 300 is in a locked state, and the locking assembly 300 and the limiting hole 211 are limited, so that the rotating member 100 is connected with the locking assembly 300 and the fixed member 200 as a whole, ensuring that the rotating member 100 will not shake during use, thereby improving the reliability and stability of the opening and closing self-locking device 10. Compared with the simple latch plus lock buckle method in the prior art, the rotating member 100 in the present application can stop and self-lock at any angle during the opening and closing movement, while improving the user experience. The opening and closing self-locking device 10 is an integrated structure, which reduces the noise of the parts connected to the rotating member 100 and the parts connected to the fixed member 200, and achieves a silent effect.

[0039] As shown in Fig. 2, Fig. 3 and Fig. 4, the locking assembly 300 further includes an elastic member 310 and a locking member 320, wherein the elastic member 310 is connected to the locking member 320. When the locking assembly 300 is in a locked state, the elastic member 310 drives the locking member 320 so that the locking member 320 is limitedly matched with the limiting hole 211; when the locking assembly 300 is in an unlocked state, the locking member 320 is separated from the limiting hole 211 and squeezes the elastic member 310. In this way, when the rotating member 100 needs to rotate to a preset position, the locking member 320 is pressed so that the locking member 320 squeezes the elastic member 310, and the elastic member 310 is pressed so that the locking member 320 is released from the limited match, thereby ensuring that the rotating member 100 can rotate smoothly relative to the fixed member 200. When the rotating member 100 rotates to the preset position, the locking member 320 is released, and the elastic member 310 is reset to drive the locking member 320 to move, so that the locking member 320 can contact the limiting hole 211 again to limit the position, ensuring that when the rotating member 100 and the fixed member 200 have a tendency to move relative to each other, the locking member 320 and the inner wall of the limiting hole 211 rub against each other to generate resistance, thereby ensuring that the rotating member 100 can stop and self-lock at any angle relative to the fixed member 200.

[0040] In other embodiments, the locking assembly 300 may also be limitedly matched with the limiting hole 211 by means of a clamp, a buckle, a latch or other methods.

[0041] As shown in FIG. 1 and FIG. 5 , optionally, the elastic member 310 is set as a spring, the locking member 320 includes a resisting portion 323 and a sleeve portion 322, and the locking assembly 300 also includes an axle pin 330, the axle pin 330 is mounted on the rotating member 100, the sleeve portion 322 is slidably sleeved on one end of the axle pin 330 close to the limiting hole 211, the spring is in a compressed state and is located between the sleeve portion 322 and the rotating member 100, the resisting portion 323 is limitedly matched with the limiting hole 211, and the outer diameter of the resisting portion 323 gradually decreases in the direction away from the sleeve portion 322 (as shown in the direction C in FIG. 2 ). In this way, the pin can guide the spring, so that the spring can drive the locking member 320 to move in the direction close to the limiting hole 211, ensuring that the resisting portion 323 can be limitedly matched with the edge of the inner wall of the limiting hole 211, thereby improving the reliability of the opening and closing self-locking device 10.

[0042] Specifically in this embodiment, the axis direction of the limiting hole 211 is arranged parallel to the axis direction of the shaft pin 330. A plug hole is provided on the side of the sleeve portion 322 away from the sliding portion 321, and the end of the shaft pin 330 close to the limiting hole 211 is inserted into the plug hole and slides with the plug hole along its own axis direction, and one end of the elastic member 310 is correspondingly abutted against the side of the sleeve portion 322 provided with the plug hole.

[0043] Specifically in this embodiment, the outer wall of the abutment portion 323 may be a conical surface or an arc surface. The outer diameter of the sleeve portion 322 is the same as the outer diameter of the end of the abutment portion 323 close to the sleeve portion 322 .

[0044] As shown in Fig. 1, Fig. 2 and Fig. 5, the locking member 320 optionally further comprises a pressing portion 325 and a sliding portion 321, wherein the pressing portion 325 is connected to the abutting portion 323 via the sliding portion 321, and the pressing portion 325 and the abutting portion 323 are located at both sides of the limiting hole 211. In this way, the pressing portion 325 can bear the driving force that causes the abutting portion 323 to move away from the limiting hole 211, and the sliding portion 321 can slide with the guide hole for guidance, thereby ensuring that the abutting portion 323 can abut against the limiting hole 211 after the rotating member 100 rotates to the preset position, thereby improving the reliability of the opening and closing self-locking device 10. Specifically in this embodiment, the outer diameter of the sliding portion 321 is the same as the outer diameter of the end of the abutting portion 323 close to the sliding portion 321.

[0045] As shown in Figures 1 and 5, in one embodiment, the rotating member 100 is provided with a first connection portion 110 and a second connection portion 120 at intervals, and the fixed member 200 is provided with a third connection portion 210 and a fourth connection portion 220 at intervals, the first connection portion 110 and the second connection portion 120 are both located between the third connection portion 210 and the fourth connection portion 220, the first connection portion 110 is rotatably connected to the third connection portion 210, and the second connection portion 120 is rotatably connected to the fourth connection portion 220.

[0046] As shown in FIG. 5 , further, the limiting hole 211 is provided on the third connecting portion 210, the first connecting portion 110 is provided with a first mounting hole 111 corresponding to the limiting hole 211, and the second connecting portion 120 is provided with a second mounting hole 121 corresponding to the first mounting hole 111, so that the locking assembly 300 can pass through the first mounting hole 111 and the second mounting hole 121, and can selectively cooperate with the limiting hole 211. In this way, the convenience of assembling the opening and closing self-locking device 10 is improved. As shown in Figures 1 and 5, in one embodiment, the outer wall of the third connecting portion 210 is further provided with a receiving hole 212. Along the sliding direction of the sliding portion 321, the receiving hole 212 is connected to one side of the limiting hole 211. The inner diameter of the receiving hole 212 is greater than or equal to the outer diameter of the sleeve portion 322. The locking assembly 300 also includes a limiting member 340. The limiting member 340 is installed on the outer wall of the sleeve portion 322. When the locking assembly 300 is in a certain locking state, one end of the sleeve portion 322 close to the interference portion 323 extends into the receiving hole 212. The limiting member 340 is limitedly matched with the inner side wall of the first connecting portion 110 to prevent the sleeve portion 322 from escaping from the rotating member 100. In this way, when the rotating member 100 needs to rotate to the preset position, the sliding part 321 is pressed, so that the sliding part 321, the contact part 323 and the sleeve part 322 move synchronously along the side close to the spring, until the sliding part 321 can slide into the limiting hole 211 and rotate with the limiting hole 211, the contact part 323 is separated from the fixed member 200 to release the limiting cooperation between the contact part 323 and the fixed member 200, and the sleeve part 322 squeezes the spring to store elastic energy. After the rotating member 100 rotates to the preset position, the sliding part 321 is released, the spring releases elastic energy to push the sleeve part 322 to move in the direction close to the limiting hole 211, and the sleeve part 322 synchronously drives the contact part 323 to move, so that the contact part 323 can contact and limit with the fixed member 200 again, and the rotating member 100 is stopped and self-locked. When the rotating member 100 needs to be rotated to a closed and locked state, the rotating member 100 is driven by an external force so that the rotating member 100 can drive the sliding portion 321 to move into the accommodating hole 212. At this time, the elastic member 310 can continue to release elastic energy to drive the sleeve portion 322 to move in a direction close to the limiting hole 211 until the sleeve portion 322 moves into the limit position, thereby enabling the sleeve portion 322 to be limited in the accommodating hole 212, thereby realizing the closed and self-locking fixation of the rotating member 100.

[0047] Specifically in this embodiment, a pressing portion 325 is provided at one end of the sliding portion 321 away from the sleeve portion 322, and the pressing portion 325 is used to receive the driving force that causes the sliding portion 321 to move in the direction close to the spring. The sliding portion 321 and the sleeve portion 322 are respectively located on opposite sides of the fixing member 200. As shown in Figures 1 and 5, further, the locking assembly 300 also includes a limiting member 340, which is installed on the outer side wall of the sleeve portion 322. When the sleeve portion 322 is limitedly matched with the inner side wall of the receiving hole 212, the limiting member 340 is limitedly matched with the side of the rotating member 100 away from the fixing member 200. In this way, the limiting member 340 can limit the position of the sleeve portion 322 relative to the rotating member 100, ensure that the locking member 320 will not slide out of the receiving hole 212, and improve the reliability of the opening and closing self-locking device 10.

[0048] Specifically in this embodiment, along the axis direction of the pin shaft 330, the first connection part 110, the limiting member 340, the elastic member 310 and the second connection part 120 are arranged in sequence. The locking member 320 is inserted into the first mounting hole 111. The pin shaft 330 is inserted into the second mounting hole 121. When the locking assembly 300 is in a locked state, the abutment part 323 is limitedly matched with the limiting hole 211, the sleeve part 322 is matched with the second connection part 120 to squeeze the elastic member 310, and the limiting member 340 on the sleeve part 322 is spaced from the first connection part 110. When the locking member 320 is in an unlocked state, the abutment part 323 is disengaged from the limiting hole 211, and the elastic member 310 is reset, so that one end of the sleeve part 322 close to the abutment part 323 extends into the accommodating hole 212, and the limiting member 340 is limitedly matched with the first connection part 110 to ensure that the sleeve part 322 will not fall out of the rotating member 100.

[0049] Optionally, the inner diameter of the first mounting hole 111 is the same as the inner diameter of the accommodating hole 212. The inner diameter of the first mounting hole 111 is larger than the inner diameter of the second mounting hole 121. A limiting portion is provided at one end of the shaft pin 330 away from the sleeve connection portion 322, and one end of the spring away from the sleeve connection portion 322 is connected to the second connecting portion 120, so that the second connecting portion 120 and the fourth connecting portion 220 can cooperate to clamp the limiting portion.

[0050] As shown in Fig. 5, optionally, the rotating member 100 further includes a rotating seat 130, the rotating seat 130, the first connecting portion 110 and the second connecting portion 120 are an integrated structure, and the fixing member 200 further includes a fixing seat 230, the fixing seat 230, the third connecting portion 210 and the fourth connecting portion 220 are an integrated structure. In this way, the rotating member 100 and the fixing member 200 are both U-shaped structures, so that the strength of the rotating member 100 and the fixing member 200 is increased, and the reliability of the opening and closing self-locking device 10 is improved.

[0051] Specifically in this embodiment, the thickness of the first connection portion 110 , the second connection portion 120 , the third connection portion 210 , and the fourth connection portion 220 are all greater than or equal to 2 mm.

[0052] As shown in Fig. 1 and Fig. 5, optionally, the outer wall of the sleeve portion 322 is provided with a slot 324, and the stopper 340 is provided as a snap ring 341, and the snap ring 341 is snap-fitted with the slot 324. In this way, the snap ring 341 and the sleeve portion 322 are detachably connected, thereby improving the convenience of assembly and maintenance of the opening and closing self-locking device 10.

[0053] Specifically in this embodiment, the locking groove 324 extends along the circumferential direction of the sleeve portion 322 .

[0054] As shown in FIG5 , optionally, the first connecting portion 110 is provided with a third mounting hole 112, the second connecting portion 120 is provided with a fourth mounting hole 122, the third connecting portion 210 is provided with a fifth mounting hole 213, the fourth connecting portion 220 is provided with a sixth mounting hole 221, and the axis of the third mounting hole 112, the axis of the fourth mounting hole 122, the axis of the fifth mounting hole 213, and the axis of the sixth mounting hole 221 are all located on the same straight line. The opening and closing self-locking device 10 also includes a first connecting member 410 and a second connecting member 420, the first connecting member 410 passes through the third mounting hole 112 and the fifth mounting hole 213, and is rotationally matched with the third mounting hole 112 and the fifth mounting hole 213, and the second connecting member 420 passes through the fourth mounting hole 122 and the sixth mounting hole 221, and is rotationally matched with the fourth mounting hole 122 and the sixth mounting hole 221.

[0055] Specifically in this embodiment, the limiting hole 211 extends around the central axis of the third mounting hole 112, that is, the limiting hole 211 extends along the circumferential direction of the third mounting hole 112. The first connecting member 410 and the second connecting member 420 can both be configured as rivets.

[0056] As shown in FIG5 , optionally, the rotating seat 130 is provided with a seventh mounting hole 131, and the seventh mounting hole 131 is used for connecting with an external component. The fixed seat 230 is provided with an eighth mounting hole 231, and the eighth mounting hole 231 is used for connecting with an external component. In this way, the rotating seat 130 can be connected with an external component through the first bolt and the seventh mounting hole 131, and the fixed seat 230 can be connected with an external component through the second bolt and the eighth mounting hole 231, thereby improving the practicality of the opening and closing self-locking device 10.

[0057] As shown in Figures 6 and 7, in one embodiment, a range hood 1 is provided, including a range hood body 20, a baffle 30 and an opening and closing self-locking device 10 in any of the above embodiments, the fixing member 200 is connected to the range hood body 20, and the rotating member 100 is connected to the baffle 30.

[0058] When the range hood 1 in the above embodiment is used, the limiting cooperation between the locking assembly 300 and the limiting hole 211 is released, so that the locking assembly 300 can rotate on the fixing member 200 with the rotating member 100, and ensure that the baffle 30 can rotate to a preset position relative to the range hood body 20. When the baffle 30 rotates to the preset position, the locking assembly 300 is in a locked state, and the locking assembly 300 and the limiting hole 211 are limited, so that the rotating member 100 can be connected with the locking assembly 300 and the fixing member 200 as a whole, ensuring that the baffle 30 will not shake during use, thereby improving the reliability and stability of the range hood 1. Compared with the simple latch plus lock buckle method in the prior art, the baffle 30 in the present application can stop and self-lock at any angle during the opening and closing movement, which is convenient for users to clean and adjust the oil absorption effect, and improves the user experience. At the same time, the opening and closing self-locking device 10 is an integrated structure, which reduces the noise caused by the hard collision with the baffle 30 and the range hood body 20, and achieves a silent effect. In addition, the opening and closing angle of the baffle 30 can be further increased, so that the oil fume absorbing effect of the range hood 1 is also increased synchronously, and the oil fume is absorbed more cleanly.

[0059] The number and installation position of the opening and closing self-locking devices 10 can be flexibly adjusted according to the actual use requirements. Specifically in this embodiment, the number of the opening and closing self-locking devices 10 is two.

[0060] Specifically in this embodiment, the range hood body 20 includes a shell and a smoke collecting chamber assembly. The smoke collecting chamber assembly is installed in the shell, and the fixing member 200 can be installed on the shell or the smoke collecting chamber assembly.

[0061] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application 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, and therefore cannot be understood as a limitation on the present application.

[0062] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0063] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0064] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0065] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0066] It should also be understood that when explaining the connection relationship or positional relationship of elements, although not explicitly described, the connection relationship and positional relationship are interpreted as including an error range, which should be within the acceptable deviation range of a specific value determined by those skilled in the art. For example, "approximately", "approximately" or "substantially" may mean within one or more standard deviations, which are not limited here.

[0067] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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.

[0068] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An opening and closing self-locking device, characterized in that: include: Rotating member (100); A fixed member (200), the fixed member (200) being rotatably connected to the rotating member (100), the fixed member (200) being provided with a limiting hole (211) extending around a rotation axis of the rotating member (100); and A locking assembly (300), wherein the locking assembly (300) is mounted on the rotating member (100); when the locking assembly (300) is in a locked state, the locking assembly (300) is limitedly matched with the limiting hole (211) so that the rotating member (100) and the fixing member (200) are relatively fixed; when the locking assembly (300) is in an unlocked state, the locking assembly (300) is disengaged from the limiting hole (211), and the rotating member (100) can rotate relative to the fixing member (200).

2. The opening and closing self-locking device according to claim 1, characterized in that: The locking assembly (300) comprises an elastic member (310) and a locking member (320), wherein the elastic member (310) is connected to the locking member (320); when the locking assembly (300) is in a locked state, the elastic member (310) drives the locking member (320) so that the locking member (320) and the limiting hole (211) are limitedly matched; when the locking assembly (300) is in an unlocked state, the locking member (320) is disengaged from the limiting hole (211) and squeezes the elastic member (310).

3. The opening and closing self-locking device according to claim 2, characterized in that: The elastic member (310) is configured as a spring, the locking member (320) includes a resisting portion (323) and a sleeve portion (322), the locking assembly (300) further includes an axle pin (330), the axle pin (330) is mounted on the rotating member (100), the sleeve portion (322) is slidably sleeved on one end of the axle pin (330) close to the limiting hole (211), the spring is in a compressed state and is located between the sleeve portion (322) and the rotating member (100), the resisting portion (323) is limitedly matched with the limiting hole (211), and the outer diameter of the resisting portion (323) gradually decreases in a direction away from the sleeve portion (322).

4. The opening and closing self-locking device according to claim 3, characterized in that: The locking member (320) further comprises a pressing portion (325) and a sliding portion (321); the pressing portion (325) is connected to the resisting portion (323) via the sliding portion (321); the pressing portion (325) and the resisting portion (323) are located on two sides of the limiting hole (211).

5. The opening and closing self-locking device according to any one of claims 1 to 4, characterized in that: The rotating member (100) is provided with a first connecting portion (110) and a second connecting portion (120) at intervals, and the fixed member (200) is provided with a third connecting portion (210) and a fourth connecting portion (220) at intervals, the first connecting portion (110) and the second connecting portion (120) are both located between the third connecting portion (210) and the fourth connecting portion (220), the first connecting portion (110) is rotatably connected to the third connecting portion (210), and the second connecting portion (120) is rotatably connected to the fourth connecting portion (220).

6. The opening and closing self-locking device according to claim 5, characterized in that: The limiting hole (211) is arranged on the third connecting portion (210); the first connecting portion (110) is provided with a first mounting hole (111) corresponding to the limiting hole (211); the second connecting portion (120) is provided with a second mounting hole (121) corresponding to the first mounting hole (111); the locking assembly (300) is passed through the first mounting hole (111) and the second mounting hole (121), and can selectively cooperate with the limiting hole (211) in a limiting manner.

7. The opening and closing self-locking device according to claim 6, characterized in that: The locking assembly (300) comprises an elastic member (310), a locking member (320) and an axle pin (330); the elastic member (310) is configured as a spring; the locking member (320) comprises a resisting portion (323), a sleeve portion (322), a pressing portion (325) and a sliding portion (321); the axle pin (330) is mounted on the rotating member (100); the sleeve portion (322) is slidably sleeved on the axle pin (330) At one end close to the limiting hole (211), the spring is located between the sleeve portion (322) and the rotating member (100) in a compressed state, the abutment portion (323) is limitedly matched with the limiting hole (211), and the outer diameter of the abutment portion (323) gradually decreases in a direction away from the sleeve portion (322); the pressing portion (325) is connected to the abutment portion (323) via the sliding portion (321), and the pressing portion ( The third connecting portion (210) and the abutting portion (325) are located on both sides of the limiting hole (211); the outer wall of the third connecting portion (210) is also provided with a receiving hole (212), and along the sliding direction of the sliding portion (321), the receiving hole (212) is connected with one side of the limiting hole (211), and the inner diameter of the receiving hole (212) is greater than or equal to the outer diameter of the sleeve portion (322); the locking assembly (300) also includes a limiting member (340), the limiting member (340) is installed on the outer wall of the sleeve portion (322), when the locking assembly (300) is in a certain locking state, one end of the sleeve portion (322) close to the abutment portion (323) extends into the accommodating hole (212), and the limiting member (340) is limitedly matched with the inner wall of the first connecting portion (110) to prevent the sleeve portion (322) from escaping from the rotating member (100).

8. The opening and closing self-locking device according to claim 7, characterized in that: The outer side wall of the sleeve portion (322) is provided with a clamping groove (324), and the limiting member (340) is configured as a clamping ring (341), and the clamping ring (341) is clamped and matched with the clamping groove (324).

9. The opening and closing self-locking device according to claim 5, characterized in that: The first connecting portion (110) is provided with a third mounting hole (112), the second connecting portion (120) is provided with a fourth mounting hole (122), the third connecting portion (210) is provided with a fifth mounting hole (213), and the fourth connecting portion (220) is provided with a sixth mounting hole (221), the axis of the third mounting hole (112), the axis of the fourth mounting hole (122), the axis of the fifth mounting hole (213) and the axis of the sixth mounting hole (221) are all located on the same straight line, and the opening and closing The locking device (10) further comprises a first connecting member (410) and a second connecting member (420), wherein the first connecting member (410) passes through the third mounting hole (112) and the fifth mounting hole (213), and is rotationally engaged with the third mounting hole (112) and the fifth mounting hole (213), and the second connecting member (420) passes through the fourth mounting hole (122) and the sixth mounting hole (221), and is rotationally engaged with the fourth mounting hole (122) and the sixth mounting hole (221).

10. A range hood, characterized in that: It comprises a range hood body (20), a baffle (30) and an opening and closing self-locking device (10) according to any one of claims 1 to 9, wherein the fixing member (200) is connected to the range hood body (20), and the rotating member (100) is connected to the baffle (30).

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