Range hood

Abstract

A first mounting base and a second mounting base are arranged on the left side and the right side of the bottom of a machine shell correspondingly, an oil cup is provided with a rotary connecting end and a locking connecting end, and the rotary connecting end of the oil cup is rotationally connected to the second mounting base around the axis extending in the vertical direction; the oil cup at least has a first state and a second state along with the change of the rotating position of the oil cup relative to the machine shell, in the first state, the locking connecting end is connected with the first installation base, the rotating connecting end cannot be detached relative to the second installation base, and the oil cup is integrally folded at the bottom of the machine shell. And in the second state, the locking connecting end is separated from the first mounting seat, the rotating connecting end can be detached relative to the second mounting seat, and the whole oil cup extends forwards from the bottom of the machine shell. After the oil cup rotates forwards around the rotating connecting end, the whole oil cup extends forwards, the condition of oil in the oil cup can be conveniently seen, and after the oil cup rotates by a set angle, the rotating connecting end of the oil cup can be detached relative to the second mounting base, so that the oil cup can be conveniently detached.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and in particular to a range hood. Background Art

[0002] The range hood is a common kitchen appliance. It operates based on the principles of fluid dynamics. A centrifugal fan installed inside the range hood generates negative pressure suction, drawing fumes from beneath the hood into the centrifugal fan. The fan accelerates the airflow and guides it outside, thus purifying the kitchen environment. As the range hood discharges fumes, much of the grease is separated. Therefore, a grease collection cup is often installed at the bottom of the range hood to collect this separated grease.

[0003] Currently, there are several ways to check the amount of oil in the oil cup of a range hood, but all of them have their own shortcomings: one is to directly remove the oil cup to check, which is extremely inconvenient. The second is to set a transparent plastic area in the middle of the oil cup for the user to view. Since the display effect is not obvious, the user needs to tilt his head and neck to view it. Secondly, the transparent plastic in the middle is prone to yellowing and darkening after long-term contact with oil stains, which affects the user's judgment. The third method is to add a sensor to the oil cup to detect whether the oil level has reached the warning line, but the addition of the sensor increases the production cost. On the other hand, the sensor is contaminated by oil smoke, which is not only prone to recognition errors, but also may be damaged over a long period of time. For example, the application number 202222494762.4 "An oil cup structure and a range hood using the oil cup structure" discloses this.

[0004] The installation and removal of the oil cup of the existing range hood is also relatively inconvenient. The user needs to hold one end with both hands and align them with the respective grooves before installation and removal. When one side is tilted, installation and removal become difficult, especially when removing the oil cup filled with oil, it is very easy to tip over and get stained with oil, which reduces the user experience. When installing and removing the oil cup, you need to tilt your head and neck to see whether the two sides of the oil cup are stuck in the designated grooves, which makes the installation very inconvenient. When installing and removing the oil cup of certain models (such as the new European style, side-suction type) of range hoods, it is very easy for the head to touch the range hood and get stained with oil, which greatly affects the user experience and mood.

[0005] Therefore, existing range hoods also need further improvement. Summary of the Invention

[0006] The first technical problem to be solved by the present invention is to provide a range hood that allows users to clearly and intuitively check the amount of oil in the oil cup in response to the current state of the existing technology.

[0007] The second technical problem to be solved by the present invention is to provide a range hood with an oil cup that is easy to disassemble and assemble, in view of the current status of the existing technology.

[0008] The technical solution adopted by the present invention to solve any one of the first and second technical problems is: a range hood comprising:

[0009] chassis;

[0010] The oil cup is in the shape of a long strip and is provided at the bottom of the housing;

[0011] A first mounting seat and a second mounting seat are respectively provided on the left and right sides of the bottom of the housing. The two ends of the oil cup in the longitudinal direction are a rotating connection end and a locking connection end respectively. The rotating connection end of the oil cup is rotatably connected to the second mounting seat around an axis extending vertically, and has at least a first state and a second state as its rotational position relative to the housing changes:

[0012] In the first state, the locking connection end is connected to the first mounting seat, the rotating connection end is non-detachable relative to the second mounting seat, and the oil cup is entirely retracted at the bottom of the housing;

[0013] In the second state, the locking connection end is disengaged from the first mounting seat, and the rotating connection end is detachable relative to the second mounting seat, and the oil cup as a whole extends forward from the bottom of the casing.

[0014] Because the oil cup's rotatable connection is rotatably connected to the first mounting base about a vertically extending axis, the oil cup extends forward as it rotates forward about the rotatable connection, allowing easy visualization of the oil content within the cup. After the oil cup is rotated through a set angle, i.e., in its second state, the rotatable connection can be detached from the second mounting base, allowing for easy removal of the oil cup. Installing and removing the oil cup by rotating the oil cup forward through a specific angle ensures ample space for operation while minimizing the risk of oil contamination.

[0015] In order to simplify the processing of the oil cup and facilitate the rotation limiting and locking of the oil cup, the top of the locking connection end and the top of the rotation connection end of the oil cup respectively have a first plug-in piece and a second plug-in piece extending forward and backward, and a slot extending forward and backward is defined on the first mounting seat or between the first mounting seat and the casing. The second mounting seat has a vertically extending rotation limiting shaft, and the second plug-in piece has a limiting hole with a side opening. The rotation limiting shaft can slide into the side opening of the limiting hole and be rotationally limited in the limiting hole.

[0016] As an improvement, the peripheral wall of the rotation limiting shaft includes two opposite limiting planes and two rotating arc surfaces respectively connected between the two limiting planes, and the side opening of the limiting hole is a contraction opening with a width smaller than the diameter of the main body of the limiting hole;

[0017] In the first state, the first insert is inserted into the slot, and the limiting plane of the rotation limiting shaft is opposite to the contraction opening of the limiting hole;

[0018] In the second state, the first inserting piece is disengaged from the slot, and the rotating arc surface of the rotation limiting shaft is opposite to the shrinkage opening of the limiting hole.

[0019] The above structural design enables the oil cup to be installed and removed only in a specific position. At any other position, the oil cup cannot be installed and removed due to the size relationship between the contraction port and the rotation limit shaft, thereby ensuring the reliability of the oil cup installation.

[0020] As an improvement, the second mounting base is a U-shaped bracket with a forward opening, comprising a first plate and a second plate facing each other. The rotation limiter shaft extends downward from the first plate located at the upper portion of the U-shaped bracket. The U-shaped bracket structure of the second mounting base effectively supports the oil cup and prevents the oil cup from slipping.

[0021] In order to better position the oil cup in the U-shaped bracket and further ensure the stability of the oil cup's rotation around the rotation limit axis, one of the top wall of the second plate body of the U-shaped bracket and the bottom wall of the oil cup is provided with a positioning protrusion, and the other is provided with a positioning recess. The positioning protrusion is rotatably arranged in the positioning recess, and both are vertically opposite to the rotation limit axis.

[0022] In order to better meet the user's operating habits and facilitate the user to install and disassemble the oil cup from the second mounting seat, when the oil cup is in the second state, the oil cup extends in the front-to-back direction or the oil cup tilts forward from the rotating connection end to the locking connection end.

[0023] To further ensure the reliability of the oil cup after it is installed in place and to facilitate the user to pick up the unlocked oil cup and rotate it to remove it, the first insert of the oil cup is movably arranged in the slot of the first mounting seat by a push-type elastic self-locking mechanism. The push-type elastic self-locking mechanism includes a sliding member with a locking portion. When the first insert is pressed into or out of the slot by an external force, the sliding member can move between a locked position and an unlocked position at a predetermined distance in the front-to-back direction relative to the first mounting seat.

[0024] When the sliding member moves to the locked position, the locking portion of the sliding member moves toward the locking position of the first inserting piece and forms a locking engagement with the locking position to prevent the first inserting piece from falling out of the slot;

[0025] When the sliding member moves to the unlocking position, the locking portion of the sliding member moves away from the locking position of the first inserting piece, releasing the locking of the locking position and allowing the first inserting piece to escape from the slot.

[0026] As an improvement, the first mounting seat includes a fixed seat and an upper limit plate detachably connected to the top of the fixed seat, the slot is defined between the fixed seat and the bottom of the casing, and a limiting slide for accommodating the sliding member is defined between the upper limit plate and the fixed seat.

[0027] In order to ensure the flexibility and reliability of the locking and locking action between the sliding member and the first plug piece during the sliding back and forth movement of the sliding member, the first plug piece is provided with a bayonet as the locking position. The sliding member includes a slider body and an elastic support arm connected to the slider body and capable of swinging laterally. The elastic support arm has a hook protruding laterally as the locking portion. The fixing seat is provided with a pressing inclined surface that can slidably cooperate with the main body or hook of the elastic support arm at a position corresponding to the elastic support arm. When the sliding member moves to the unlocked position, the elastic support arm is pressed by the pressing inclined surface so that its hook part disengages from the bayonet of the first plug piece. When the sliding member moves to the locked position, the elastic support arm returns to its initial position and its hook part is engaged with the bayonet of the first plug piece.

[0028] As an improvement, the elastic arm extends forward from the slider body, the hook portion of the elastic arm protrudes upward, the body or hook portion of the elastic arm has a protrusion extending leftward or rightward, the pressing inclined surface on the fixing seat gradually tilts downward from back to front, and the protrusion slides and fits on the bottom of the pressing inclined surface. It is conceivable that the hook portion of the elastic arm can also protrude downward, leftward, or rightward, and the pressing inclined surface on the bracket can be designed to be inclined accordingly.

[0029] In order to simplify the structure of the press-type elastic self-locking mechanism, the press-type elastic self-locking mechanism also includes a pull rod and an elastic member in addition to the sliding member. The slider body is provided with an annular track groove, and the track groove has a stop portion. The first end of the pull rod is swingably connected to the fixed seat, and the second end of the pull rod has a limiting protrusion. During the forward and backward movement of the sliding member relative to the fixed seat, the limiting protrusion is unidirectionally slidably constrained in the track groove. The elastic member acts on the sliding member and makes the sliding member always have a tendency to move forward.

[0030] When the first inserting piece is inserted into the slot, the second end of the pull rod abuts against the stop portion of the sliding member, thereby keeping the sliding member in the locked position;

[0031] When the first inserting piece exits the slot, the second end of the pull rod disengages from the stop portion of the sliding member, and the sliding member moves to the unlocking position under the action of the elastic member.

[0032] In order to realize the unidirectional movement of the limiting protrusion of the pull rod along the track groove, the track groove includes a first guide section, a second guide section, a third guide section and a fourth guide section which are connected in a circular manner in sequence. The first guide section extends from back to front, and the fourth guide section extends from front to back. The first guide section and the fourth guide section also have a first limiting step in the joint position for blocking the limiting protrusion of the limiting rod from returning from the first guide section to the fourth guide section. The second guide section extends from front to back, and the first guide section and the second guide section have a limiting protrusion for blocking the limiting rod at the joint position. The guide rail is moved from the second guide section back to the second limiting step in the first guide section, and the third guide section extends from back to front. The engaging position of the second guide section and the third guide section is arranged at an angle to define the stop portion. The second guide section and the third guide section also have a limiting protrusion at the engaging position for blocking the limiting rod from returning from the third guide section to the third limiting step in the second guide section. The engaging position between the third guide section and the second guide section has a limiting protrusion for blocking the limiting rod from returning from the fourth guide section to the fourth limiting step in the third guide section.

[0033] In order to avoid interference problems during the rotation of the first insert of the oil cup around its rotating connection end, the first mounting seat is provided with a clearance opening that is connected to the slot on a side away from the second mounting seat; or the first mounting seat defines a clearance opening that is connected to the slot between a side away from the second mounting seat and the bottom of the casing.

[0034] Compared with the prior art, the present invention has the following advantages:

[0035] 1. The oil cup cooperates with the push-type elastic self-locking mechanism and the rotating installation limit structure. Users can check the oil level in the oil cup and install and remove the oil cup very conveniently and quickly. At the same time, there is no need to remove any parts with tools. This solves the problems of difficulty in checking the oil level, inconvenience in removing and installing the oil cup, and the possibility of oil contamination during these two processes.

[0036] 2. When the oil cup is in the locked state, gently press the locking connection end of the oil cup to unlock it. The oil cup can rotate forward freely, and the oil condition inside the oil cup is easily visible. The user can now choose to check the oil level or even disassemble the oil cup for cleaning. At the same time, when the oil cup is in the unlocked state, gently press the locking connection end of the oil cup to lock it, ensuring the reliability of the oil cup installation.

[0037] 3. The peripheral wall of the rotation limit shaft has a special structural design (the cross section is similar to a runway shape). The oil cup can only be removed when it is rotated forward to a specific angle (such as when it is perpendicular to the wall). It cannot be removed at any position other than a specific tilt angle to prevent the risk of the user accidentally touching it and dropping it.

[0038] 4. The oil cup can be installed and removed by rotating it forward a certain angle, which ensures sufficient space for operation and avoids the risk of oil contamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 Schematic diagram of the three-dimensional structure of the range hood according to an embodiment of the present invention (the oil cup is in the first state);

[0040] Figure 2 This is a schematic diagram of the three-dimensional structure of the left side portion of the housing of the range hood according to an embodiment of the present invention without the left side wall;

[0041] Figure 3 This is a schematic diagram of the three-dimensional structure of the left side of the housing of the range hood according to an embodiment of the present invention, with the left side wall omitted (the locking connection end of the oil cup is in a state of being deflected forward at a certain angle);

[0042] Figure 4 Schematic diagram of the three-dimensional structure of the range hood according to an embodiment of the present invention (the oil cup is in the second state);

[0043] Figure 5 Schematic diagram of the three-dimensional structure of the range hood according to an embodiment of the present invention (the oil cup is in a detached state);

[0044] Figure 6 This is a schematic diagram of the three-dimensional structure of the oil cup and the second mounting seat in a separated state according to an embodiment of the present invention;

[0045] Figure 7 This is an exploded view of the push-type elastic self-locking mechanism of the range hood according to an embodiment of the present invention;

[0046] Figure 8 Schematic diagram of the three-dimensional structure of a sliding member according to an embodiment of the present invention;

[0047] Figure 9 Schematic diagram of the three-dimensional structure of the fixing base according to an embodiment of the present invention;

[0048] Figure 10 Schematic diagram of the three-dimensional structure of the push-type elastic self-locking mechanism of the range hood according to an embodiment of the present invention (the sliding member is in the locked position). DETAILED DESCRIPTION

[0049] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0050] In the present specification and claims, directional terms such as "front," "back," "up," "down," "left," "right," "side," "top," and "bottom" are used to describe various exemplary structural parts and components of the present invention. However, these terms are used herein for convenience of description only and are based on the exemplary orientations shown in the accompanying drawings. Because the embodiments disclosed herein can be arranged in various orientations, these directional terms are intended for illustrative purposes only and should not be construed as limiting. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0051] Figures 1-10 A preferred embodiment of the range hood of the present invention is shown. The range hood includes a casing 10 and a centrifugal fan disposed in the casing 10. The casing 10 generally includes a fan frame 11 and a smoke hood 12 disposed at the bottom of the fan frame 11. The inner cavity of the fan frame 11 is connected to the inner cavity of the smoke hood 12. An air inlet is provided on the front side wall of the smoke hood 12, and external smoke can enter the smoke hood 12 through the air inlet. The centrifugal fan is disposed in the fan frame 11. When the centrifugal fan is in operation, negative pressure is generated, and external oil smoke can be sucked into the smoke hood 12 through the air inlet. An oil cup 30 is provided at the bottom of the smoke hood 12. The oil cup 30 is in the shape of an elongated strip extending left and right, and is used to receive oil stains flowing down from the smoke hood 12. The front portion of the smoke hood 12 is further provided with a smoke deflector 13 that can be pivoted forward and backward relative to the smoke hood 12. The smoke deflector 13 is connected to the main body of the smoke hood 12 via a hinge mechanism. Specifically, the smoke deflector 13 can be pivoted forward to open the aforementioned air inlet and pivoted backward to block and close the aforementioned air inlet. The hinge mechanism for pivoting the smoke deflector 13 can be a conventional hinge mechanism known in the art and will not be described further herein.

[0052] The top of the oil cup 30 is open and is detachably mounted on the bottom of the housing 10. The two ends of the oil cup 30 in the longitudinal direction are respectively a locking connection end and a rotating connection end. The first mounting seat 2 and the second mounting seat 22 are respectively provided on the left and right sides of the bottom of the housing 10. Figure 3 and Figure 5As shown, the first mounting seat 2 is located on the left side of the bottom of the housing 10, and the second mounting seat 22 is located on the right side of the bottom of the housing 10. A slot 200 extending in the front-to-back direction is defined between the first mounting seat 2 and the bottom of the housing 10. A clearance opening 202, which is in communication with the slot 200, is further defined between the side of the first mounting seat 2, away from the second mounting seat 22, and the bottom of the housing 10. That is, the clearance opening 202 faces leftward. Correspondingly, the top edge of the left side of the oil cup 30 has a first insert 31 that is folded toward the center of the oil cup 30. This first insert 31 can be inserted into the slot 200 from the front to the back to install the locking connection end of the oil cup 30, and can be removed from the slot 200 to remove the locking connection end of the oil cup 30. The top edge of the right side of the oil cup 30 has a second insert 32 folded toward the middle position of the oil cup 30. The second insert 32 has a limiting hole 320 with an open side. The side exposure of the limiting hole 320 is a contraction opening 321 with a width smaller than the diameter of the main body of the limiting hole 320. Specifically, the opening direction of the contraction opening 321 of the limiting hole 320 is to the right.

[0053] The rotating connection end of the oil cup 30 is rotatably connected to the second mounting base 22 around a vertically extending axis (i.e., the axis of the rotation limit shaft 23). Specifically, the second mounting base 22 is a U-shaped bracket with its opening facing forward and comprising a first plate 221 and a second plate 222 facing each other in upper and lower positions. The rotation limit shaft 23 extends downward for a distance from the first plate 221 located at the upper portion of the U-shaped bracket. The peripheral wall of the rotation limit shaft 23 includes two opposing limiting planes 231 and two rotating arc surfaces 232 connected between the two limiting planes 231. The distance between the two limiting planes 231 is smaller than the distance between the two rotating arc surfaces 232. In other words, the cross-section of the rotation limit shaft 23 is similar to a runway. The distance between the two limiting planes 231 matches the width of the constriction opening 321 of the limiting hole 320, and the distance between the two rotating arc surfaces 232 matches the diameter of the limiting hole 320. During installation, the rotating arc surface of the rotation limit shaft 23 is aligned with the constricted opening 321 of the limiting hole 320, allowing the oil cup 30 to slide into the limiting hole 320. This structural design allows the oil cup 30 to be installed and removed only in a specific position. In any other position, due to the dimensional relationship between the constricted opening 321 and the rotation limit shaft 23, the oil cup 30 cannot be installed or removed, ensuring the secure installation of the oil cup 30.

[0054] The bottom wall of the oil cup 30 is equipped with a downwardly projecting positioning protrusion 33, the outer surface of which is a smoothly curved surface. The top wall of the second plate 222 of the U-shaped bracket is equipped with a downwardly recessed positioning recess 2220, the inner surface of which is also a curved surface. This allows the positioning protrusion 33 to be rotatably mounted within the positioning recess 2220. The positioning protrusion 33 and the positioning recess 2220 are vertically aligned with the rotation limit axis 23. The arrangement of the positioning protrusion 33 and the positioning recess 2220 ensures better positioning of the oil cup 30 within the U-shaped bracket and further ensures the stability of the oil cup 30's rotation about the rotation limit axis 23. The second mounting base 22 utilizes a U-shaped bracket structure, effectively supporting the oil cup 30 and preventing the risk of it slipping.

[0055] During installation, the positioning protrusion 33 at the bottom of the oil cup 30 is correspondingly inserted into the positioning recess 2220 of the second mounting seat 22, and the rotation limit shaft 23 can slide into the side opening of the limit hole 320 and be rotationally limited in the limit hole 320. After the rotation connection end of the oil cup 30 is assembled in place on the second mounting seat 22, the oil cup 30 can rotate around the rotation limit shaft 23, and has at least a first state and a second state as its rotation position relative to the housing 10 changes: in the first state, the first insert 31 is inserted into the slot 200 of the first mounting seat 2, and the limiting plane 231 of the rotation limit shaft 23 is opposite to the contraction opening 321 of the limit hole 320. In this way, the rotation limit shaft 23 cannot escape from the contraction opening 321 of the limit hole 320, the rotation connection end and the second mounting seat 22 cannot be detached, and the oil cup 30 is completely retracted. At the bottom of the casing 10; in the second state, the first insert 31 disengages from the slot 200, the locking connection end disengages from the first mounting seat 2, and the locking connection end of the oil cup 30 deflects and moves forward until the oil cup 30 as a whole extends in the front-to-back direction. At this time, the contraction opening 321 of the limiting hole 320 of the oil cup 30 is opposite to the rotating arc surface 232 of the rotation limiting shaft 23, the oil cup 30 moves forward, and the rotation limiting shaft 23 disengages backward from the contraction opening 321 of the limiting hole 320, and the rotation connection end is detached from the second mounting seat 22, thereby realizing the disassembly of the oil cup 30.

[0056] Because the rotatable connection end of the oil cup 30 is rotatably connected to the first mounting base 2 about a vertically extending axis, when the oil cup 30 rotates forward about the rotatable connection end, the oil cup 30 extends forward as a whole, making the oil content in the oil cup 30 easily visible. After the oil cup 30 rotates a set angle, that is, in the second state, the rotatable connection end of the oil cup 30 can be detached from the second mounting base 22, thereby conveniently removing the oil cup 30. Installing and removing the oil cup 30 by rotating the oil cup 30 forward through a specific angle ensures sufficient space for operation while avoiding the risk of oil contamination.

[0057] In this embodiment, the bottom wall of the slot 200 (i.e., the top edge of the mounting base 21) also features a retaining protrusion 201 protruding into the slot 200. This protrusion 201 extends left and right, and its cross-section (a vertical cross-section taken along the front-to-back direction) is an arc-shaped structure that gradually rises upward from the front and back sides to the middle. When the first insert of the oil cup 30 is inserted into the slot 200, the retaining protrusion 201 abuts against the bottom wall of the first insert, ensuring a secure installation and preventing it from shaking or being easily removed from the slot 200.

[0058] The first mounting base 2 of this embodiment includes a fixing base 21 and an upper limit plate 215 located above and to the right of the fixing base 21. The upper limit plate 215 is screwed to the fixing base 21. The first insert of the oil cup 30 is movable back and forth within the slot 200 of the first mounting base 2 via a push-type elastic self-locking mechanism. This means that the user can lock the first insert by pressing the side of the oil cup 30. Pressing the side of the oil cup 30 again unlocks the first insert and ejects the oil cup 30 forward.

[0059] See also Figure 7-10 The push-type elastic self-locking mechanism includes a sliding member 40 , a pull rod 43 and an elastic member 44 .

[0060] When the first insert is pressed into or out of the slot 200 by an external force, the slider 40 can move between a locked position and an unlocked position, spaced a certain distance apart in the front-to-back direction relative to the bracket. The slider 40 has a locking portion 421, and the first insert of the oil cup 30 has a locking position 310. When the slider 40 moves to the locked position, the locking portion 421 of the slider 40 moves toward the locking position 310 of the first insert and forms a locking engagement with the locking position 310, thereby restricting the first insert from being removed from the slot 200. When the slider 40 moves to the unlocked position, the locking portion 421 of the slider 40 moves away from the locking position 310 of the first insert, releasing the lock on the locking position 310 and allowing the first insert to be removed from the slot 200.

[0061] The sliding member 40 includes a slider body 41 and an elastic support arm 42 connected to the slider body 41 and capable of swinging to the side. The elastic support arm 42 has a hook portion protruding to the side as a locking portion 421. The first insert has a bayonet as a locking position 310. The bayonet is a closed hole or a semi-closed opening.

[0062] A limiting slideway 214 is defined between the upper limit plate 215 and the fixed seat 21 for accommodating the sliding member 40. One of the sliding member 40 and the bracket is provided with a limiting rib 211 extending forward and backward, and the other is provided with a limiting groove 400 extending forward and backward. Figure 8 and Figure 9The fixing seat 21 has an upwardly protruding limiting rib 211, and the bottom of the slider body 41 has an upwardly recessed limiting groove 400. The limiting rib 211 is slidably arranged in the limiting groove 400, thereby ensuring that the sliding member 40 can slide smoothly relative to the bracket.

[0063] Continue to see Figure 8 The upper portion of the slider body 41 is provided with an annular track groove 410, and the front portion of the track groove 410 has a portion that is recessed backward from both sides to the middle as a stopper 419. The first end of the pull rod 43 is swingably connected to the hanger, and the second end of the pull rod 43 has a limiting protrusion 431. Specifically, both ends of the pull rod 43 have a downwardly bent hook. The hook at the first end is rotatably arranged in the socket 213 of the fixed seat 21, and the hook at the second end is constrained in the track groove 410. In the process of the sliding member 40 moving back and forth relative to the hanger, the second end of the pull rod 43 can slide unidirectionally along the track groove 410. More specifically, the track groove 410 includes a first guide section 411, a second guide section 412, a third guide section 413, and a fourth guide section 414 that are cyclically connected in sequence. The first guide section 411 extends from rear to front, and the fourth guide section 414 extends from front to rear. At the joint position between the first and fourth guide sections 411 and 414, a limiting protrusion 431 is provided for blocking the limiting rod from returning from the first guide section 411 to the first limiting step 415 in the fourth guide section 414. The second guide section 412 extends from front to rear. At the joint position between the first and second guide sections 411 and 412, a limiting protrusion 431 is provided for blocking the limiting rod from returning from the second guide section 412 to the second limiting step 416 in the first guide section 411. The third guide section 413 extends from rear to front. The second guide section 412 and the third guide section 413 are arranged at an angle at the junction, thereby defining the aforementioned stop 419. The second guide section 412 and the third guide section 413 further have a limiting protrusion 431 at the junction, which is used to prevent the limiting rod from returning from the third guide section 413 to the third limiting step 417 in the second guide section 412. The junction between the third guide section 413 and the second guide section 412 has a limiting protrusion 431, which is used to prevent the limiting rod from returning from the fourth guide section 414 to the fourth limiting step 418 in the third guide section 413. The bottom surface of the first guide section 411 of the track groove 410 gradually rises toward the second guide section 412, the bottom surface of the second guide section 412 of the track groove 410 gradually rises toward the third guide section 413, the bottom surface of the third guide section 413 of the track groove 410 gradually rises toward the fourth guide section 414, and the bottom surface of the fourth guide section 414 of the track groove 410 gradually rises toward the first guide section 411.

[0064] The elastic member 44 is a tension spring, with its first end connected to the hanger and its second end connected to the slider 40. Specifically, the tension spring is located on the front side of the slider body 41. The front portion of the slider body 41 has a first connecting post 401 for the first end of the tension spring to hang on, and the fixed base 21 has a second connecting post 212 for the second end of the spring to hang on. Under the elastic force of the tension spring, the slider 40 has a tendency to move forward.

[0065] The mounting base 21 on the hanger is provided with a pressing inclined surface 210 at a position corresponding to the elastic arm 42, which is capable of slidingly engaging with the main body or hook portion of the elastic arm 42. Specifically, the elastic arm 42 extends forward from the slider body 41, and the hook portion of the elastic arm 42 protrudes upward. The main body or hook portion of the elastic arm 42 has a protruding column 422 extending leftward or rightward. The pressing inclined surface 210 on the hanger gradually slopes downward from the back to the front, and the protruding column 422 slides and engages with the bottom of the pressing inclined surface 210.

[0066] When the user presses the left or right side of the oil cup 30 and releases it, the first insert of the oil cup 30 first drives the sliding member 40 to move backward, and then moves forward a certain distance under the action of the elastic member 44. The second end of the pull rod 43 corresponds to the first guide section 411 and the second guide section 412 along the track groove 410 and moves unidirectionally to the stop portion 419. At this time, the sliding member 40 is in the locked position. At the same time, the boss 422 of the elastic support arm 42 of the sliding member 40 also moves backward along the pressing inclined surface 210, wherein the elastic support arm 42 is reset upward to the initial position, and the hook of the elastic support arm 42 is snapped into the snap-in of the first insert, thereby locking the first insert of the oil cup 30. When the user presses the left or right side of the oil cup 30 again and releases it, the first insert of the oil cup 30 first drives the sliding member 40 to move backward, and then moves forward under the action of the elastic member 44. The second end of the pull rod 43 disengages from the stop portion 419, and then moves unidirectionally along the third guide section 413 and the fourth guide section 414 of the track groove 410. When the sliding member 40 moves forward to the limit position, it is in the unlocked position. At the same time, in this process, the boss 422 of the elastic support arm 42 of the sliding member 40 also moves forward along the pressing inclined surface 210. The elastic support arm 42 overcomes its own elastic force and swings downward until the hook of the elastic support arm 42 disengages from the snap-fit ​​of the first insert, releasing the lock of the hook of the elastic support arm 42 on the first insert of the oil cup 30, and the spring piece of the oil cup 30 automatically pops forward a distance, making it convenient for the user to take the oil cup 30.

[0067] The disassembly and assembly process of the oil cup 30 of this embodiment is as follows:

[0068] The user directs the right side of the oil cup 30 toward and perpendicular to the range hood (wall), the bottom of the oil cup 30 contacts the U-shaped bracket, and the rotating limit shaft 23 gradually passes through the contraction opening 321 of the second insert 32 of the oil cup 30 and finally reaches the limit hole 320. At this time, the positioning protrusion 33 of the oil cup 30 is stuck in the positioning recess 2220 of the fixing seat of the second mounting seat 22 under the action of the oil cup 30's own weight, and can rotate in the positioning recess 2220. At this time, the right side positioning installation of the oil cup 30 is completed. Rotate the oil cup 30 so that its left end gradually approaches the first mounting seat 2. When the first insert 31 on the left side of the oil cup 30 contacts the sliding member 40, it pushes the sliding member 40 to move backward. At this time, the tension spring is gradually stretched, and the second end of the pull rod 43 moves along the locking path of the track groove 410 to reach the stop portion 419. The support arm 42 of the sliding member 40 is reset upward to the initial position, and the hook of the elastic support arm 42 is inserted into the bayonet of the first insert, thereby locking the first insert of the oil cup 30. At this time, the entire oil cup 30 is installed and fixed.

[0069] When the user wants to remove the oil cup 30, he only needs to gently press the left side of the oil cup 30, and the pull rod 43 will leave the stop portion 419 along the unlocking path of the track groove 410. At this time, under the action of the restoring force of the tension spring, the sliding member 40 gradually moves forward, and the elastic support arm 42 of the sliding member 40 gradually descends along the pressing inclined surface 210, that is, it swings downward until the hook of the elastic support arm 42 disengages from the latch of the first plug-in piece, releasing the lock of the hook of the elastic support arm 42 on the first plug-in piece of the oil cup 30, and the spring piece of the oil cup 30 automatically pops forward a distance. The user picks up the locking connection end of the oil cup 30 and rotates the oil cup 30 in the direction away from the range hood (that is, deflects forward with the rotation limit shaft 23 as the rotation axis) until the oil cup 30 is perpendicular to the range hood (wall) as a whole. Hold the oil cup 30 and pull it outward, and the rotation limit shaft 23 disengages from the shrinkage opening 321 on the second plug-in piece 32 of the oil cup 30. At this time, the oil cup 30 is completely removed.

Claims

1. A range hood, comprising: Housing (10); The oil cup (30) is in the shape of a long strip and is arranged at the bottom of the housing (10); The invention is characterized in that: a first mounting seat (2) and a second mounting seat (22) are respectively provided on the left and right sides of the bottom of the housing (10); two ends of the oil cup (30) in the length direction are respectively a rotating connection end and a locking connection end; the rotating connection end of the oil cup (30) is rotatably connected to the second mounting seat (22) around an axis extending vertically, and has at least a first state and a second state as its rotation position relative to the housing (10) changes: In a first state, the locking connection end is connected to the first mounting seat (2), the rotating connection end is non-detachable relative to the second mounting seat (22), and the oil cup (30) is entirely retracted at the bottom of the housing (10); In the second state, the locking connection end is disengaged from the first mounting seat (2), and the rotating connection end is detachable relative to the second mounting seat (22), and the oil cup (30) as a whole extends forward from the bottom of the casing (10).

2. The range hood according to claim 1, characterized in that: The top of the locking connection end and the top of the rotating connection end of the oil cup (30) are respectively provided with a first inserting piece (31) and a second inserting piece (32) extending forward and backward; a slot (200) extending forward and backward is defined on the first mounting seat (2) or between the first mounting seat (2) and the housing (10); a rotation limiting shaft (23) extending vertically is provided on the second mounting seat (22); a limiting hole (320) with a side opening is provided on the second inserting piece (32); the rotation limiting shaft (23) can slide into the side opening of the limiting hole (320) and be rotationally limited in the limiting hole (320).

3. The range hood according to claim 2, characterized in that: The peripheral wall of the rotation limiting shaft (23) comprises two opposite limiting planes (231) and two rotating arc surfaces (232) respectively connected between the two limiting planes (231); the side opening of the limiting hole (320) is a contraction opening (321) whose width is smaller than the diameter of the main body of the limiting hole (320); In a first state, the first inserting piece (31) is inserted into the slot (200), and the limiting plane (231) of the rotation limiting shaft (23) is opposite to the contraction opening (321) of the limiting hole (320); In the second state, the first inserting piece (31) is disengaged from the slot (200), and the rotating arc surface (232) of the rotation limiting shaft (23) is opposite to the contraction opening (321) of the limiting hole (320).

4. The range hood according to claim 3, characterized in that: The second mounting seat (22) is a U-shaped bracket, the opening of the U-shaped bracket faces forward, and comprises a first plate body (221) and a second plate body (222) which are opposite to each other up and down, and the rotation limiting shaft (23) extends downward from the first plate body (221) located at the upper part of the U-shaped bracket.

5. The range hood according to claim 4, characterized in that: One of the top wall of the second plate body (222) of the U-shaped bracket and the bottom wall of the oil cup (30) is provided with a positioning protrusion (33), and the other is provided with a positioning recess (2220), the positioning protrusion (33) is rotatably arranged in the positioning recess (2220), and both are vertically opposite to the rotation limit shaft (23).

6. The range hood according to any one of claims 1 to 5, characterized in that: When the oil cup (30) is in the second state, the oil cup (30) extends in the front-rear direction or the oil cup (30) tilts forward from the rotating connection end to the locking connection end.

7. The range hood according to any one of claims 2 to 5, characterized in that: The first inserting piece (31) of the oil cup (30) is movably arranged in the slot (200) of the first mounting seat (2) through a push-type elastic self-locking mechanism, the push-type elastic self-locking mechanism comprising a sliding piece (40), the sliding piece (40) having a locking portion (421), and when the first inserting piece is pressed by an external force to be inserted into or removed from the slot (200), the sliding piece (40) can move between a locking position and an unlocking position at a certain distance in the front-rear direction relative to the first mounting seat (2); When the sliding member (40) moves to the locked position, the locking portion (421) of the sliding member (40) moves toward the locking position (310) of the first plug-in piece and forms a locking fit with the locking position (310) to restrict the first plug-in piece from coming out of the slot (200); When the sliding member (40) moves to the unlocking position, the locking portion (421) of the sliding member (40) moves away from the locking position (310) of the first plug piece, unlocking the locking position (310) and allowing the first plug piece to escape from the slot (200).

8. The range hood according to claim 7, characterized in that: The first mounting seat (2) comprises a fixing seat (21) and an upper limit plate (215) detachably connected to the top of the fixing seat (21); the slot (200) is defined between the fixing seat (21) and the bottom of the housing (10); and a limiting slideway (214) for accommodating the sliding member (40) is defined between the upper limit plate (215) and the fixing seat (21).

9. The range hood according to claim 8, characterized in that: The first plug piece has a bayonet as the locking position (310), the sliding member (40) comprises a slider body (41) and an elastic support arm (42) connected to the slider body (41) and capable of swinging toward the side, the elastic support arm (42) having a hook portion protruding toward the side as the locking portion (421), and the fixing seat is provided with a pressing inclined surface (210) at a position corresponding to the elastic support arm (42) capable of slidingly cooperating with the body or the hook portion of the elastic support arm (42), when the sliding member (40) moves to the unlocking position, the elastic support arm (42) is pressed by the pressing inclined surface (210) so that its hook portion is separated from the bayonet of the first plug piece, and when the sliding member (40) moves to the locking position, the elastic support arm (42) is reset to the initial position and its hook portion is engaged with the bayonet of the first plug piece.

10. The range hood according to claim 9, characterized in that: The elastic support arm (42) extends forward from the slider body (41), the hook portion of the elastic support arm (42) protrudes upward, the body or the hook portion of the elastic support arm (42) is provided with a convex column (422) extending leftward or rightward, the pressing inclined surface (210) on the fixing seat gradually tilts downward from back to front, and the convex column (422) is slidably fitted at the bottom of the pressing inclined surface (210).

11. The range hood according to claim 9, characterized in that: In addition to the sliding member (40), the push-type elastic self-locking mechanism also includes a pull rod (43) and an elastic member (44); the slider body (41) is provided with an annular track groove (410), the track groove (410) has a stopper (419); the first end of the pull rod (43) is swingably connected to the fixed seat, the second end of the pull rod (43) has a limiting protrusion (431); when the sliding member (40) moves forward and backward relative to the fixed seat, the limiting protrusion (431) is unidirectionally slidably constrained in the track groove (410); the elastic member (44) acts on the sliding member (40) and makes the sliding member (40) always have a tendency to move forward; When the first inserting piece is inserted into the slot (200), the second end of the pull rod (43) abuts against the stopper (419) of the sliding member (40), thereby keeping the sliding member (40) in the locked position; When the first insert piece exits the slot (200), the second end of the pull rod (43) disengages from the stop portion (419) of the sliding member (40), and the sliding member (40) moves to the unlocking position under the action of the elastic member (44).

12. The range hood according to claim 11, characterized in that: The track groove (410) comprises a first guide section (411), a second guide section (412), a third guide section (413) and a fourth guide section (414) which are cyclically connected in sequence. The first guide section (411) extends from rear to front, and the fourth guide section (414) extends from front to rear. The first guide section (411) and the fourth guide section (414) also have a first limiting step (415) in the joint position for blocking the limiting rod from returning from the first guide section (411) to the fourth guide section (414). The second guide section (412) extends from front to rear. The first guide section (411) and the second guide section (412) have a limiting step (415) in the joint position for blocking the limiting rod from returning from the second guide section (412) to the first guide section (414). A second limiting step (416) in a guide section (411), the third guide section (413) extends from back to front, the second guide section (412) and the third guide section (413) are arranged at an angle at the engagement position to define the stop portion (419), the second guide section (412) and the third guide section (413) also have a limiting protrusion (431) for blocking the limiting rod from returning from the third guide section (413) to the third limiting step (417) in the second guide section (412) at the engagement position, and the engagement position between the third guide section (413) and the second guide section (412) has a limiting protrusion (431) for blocking the limiting rod from returning from the fourth guide section (414) to the fourth limiting step (418) in the third guide section (413).

13. The range hood according to any one of claims 8 to 12, characterized in that: The first mounting seat (2) is provided with a clearance opening (202) communicating with the slot (200) on a side away from the second mounting seat (22); or the first mounting seat (2) defines a clearance opening (202) communicating with the slot (200) between a side away from the second mounting seat (22) and a bottom of the housing (10).

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