Oil mist extractor and oil mist extractor oil screen mounting structure

Abstract

This invention relates to an oil filter mounting structure for a fume extraction device and the fume extraction device itself. The oil filter mounting structure includes: a snap-fit ​​assembly, disposed on the mounting base of the fume extraction device, including a mounting base with mounting holes and a snap-fit ​​member movably disposed on the mounting base; and a snap-fit ​​assembly, disposed on the oil filter, including a snap-fit ​​seat and a snap-fit ​​member rotatably disposed on the snap-fit ​​seat. The snap-fit ​​member has an insertion portion, and the insertion portion of the snap-fit ​​member has a snap-fit ​​engagement portion. The snap-fit ​​member has a first position and a second position as its position changes relative to the snap-fit ​​seat. When the snap-fit ​​member is in the first position, the snap-fit ​​member and the snap-fit ​​engagement portion of the snap-fit ​​member form a limiting engagement, preventing the snap-fit ​​member from disengaging from the mounting holes. When the snap-fit ​​member is in the second position, the snap-fit ​​engagement portion of the snap-fit ​​member disengages from the snap-fit ​​member, releasing the limiting engagement of the snap-fit ​​member and allowing the snap-fit ​​member to disengage from the mounting holes. The advantage is that the oil filter disassembly process is more convenient and easier to operate.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, and in particular to an oil filter installation structure and an oil fume extraction device. Background Technology

[0002] Fume extraction devices, such as range hoods and integrated cooktops, are important kitchen appliances used to purify the cooking environment. These devices typically include an oil filter assembly to filter grease particles from cooking fumes. To facilitate regular disassembly and cleaning, the oil filter is often detachably connected to the main body of the range hood (such as the smoke collection chamber). For example, Chinese utility model patent CN202470164U discloses a "Connection Structure between the External Oil Filter and the Smoke Collection Chamber of a Range Hood," which uses a snap fastener on the smoke collection chamber and a contact seat on the external oil filter. The contact seat consists of a fixed base, a spring, and two fastener pieces. The spring presses against the fastener pieces to engage with the snap fastener, thus achieving a detachable connection between the oil filter and the smoke collection chamber.

[0003] However, similar snap-fit ​​connection structures in the aforementioned prior art have significant shortcomings in practical use. Because such structures rely on the spring force to keep the clips or claws tightly engaged with the snap-fit ​​mechanism to ensure the stability of the oil filter during range hood operation, the engagement force is typically quite large. When disassembling the oil filter, users need to overcome significant spring resistance and apply considerable pulling force to forcibly pull the filter out of the smoke collection chamber. This makes the disassembly process difficult and may even cause damage to components or injury to the user due to excessive force, affecting the user experience and ease of operation. Summary of the Invention

[0004] The first technical problem to be solved by the present invention is to provide an oil mesh installation structure for a fume extraction device that is convenient and easy to operate during the oil mesh disassembly process, in light of the current state of the prior art.

[0005] The second technical problem to be solved by the present invention is to provide an oil fume extraction device that uses the above-mentioned oil mesh installation structure, in view of the current state of the prior art.

[0006] The technical solution adopted by the present invention to solve the first technical problem is as follows: an oil mesh installation structure for a fume extraction device, the fume extraction device having an installation base for installing the oil mesh, including: a snap-fit ​​assembly disposed on the installation base of the fume extraction device, including an installation seat with an installation channel and a snap-fit ​​member movably disposed on the installation seat, the snap-fit ​​member being movable between a locked position and an unlocked position, the snap-fit ​​member always having a tendency to move from the unlocked position towards the locked position; and a snap-fit ​​assembly disposed on the oil mesh, including a snap-fit ​​seat for connecting to the oil mesh and a snap-fit ​​member rotatably disposed on the snap-fit ​​seat, the snap-fit ​​member having an outward extension relative to the snap-fit ​​seat and being able to insert into the installation base. The fastener has an insertion part in the mounting hole of the mounting base, and the insertion part of the fastener has a snap-fit ​​engagement part. The extension direction of the rotation axis of the fastener relative to the fastener base is consistent with the insertion direction of the insertion part of the fastener. The fastener has a first position and a second position as its rotation position relative to the fastener base changes. When the fastener is in the first position, the snap-fit ​​part and the snap-fit ​​engagement part of the fastener form a limiting fit, restricting the fastener from coming out of the mounting hole. When the fastener is in the second position, the snap-fit ​​engagement part of the fastener disengages from the snap-fit ​​part, releasing the limiting fit on the fastener and allowing the fastener to come out of the mounting hole.

[0007] The fume extraction device of this invention refers to a kitchen product with the function of extracting and exhausting fumes. This can refer to a traditional range hood, or other kitchen products with fume extraction capabilities (such as those integrated with a fume extraction module), such as integrated cooktops, lift-up / built-in countertop range hoods, portable / tabletop fume purifiers, integrated cooking centers, and other products or systems. This embodiment uses a range hood as an example to illustrate the oil filter installation structure used in the fume extraction device.

[0008] The aforementioned installation base can be understood as the structural part on the fume extraction device used to fix and support the buckle assembly. For example, it could be the opening area on the corresponding side wall of the fume hood, an outwardly extending bracket, a reinforcing rib, or a specially designed slot.

[0009] The aforementioned snap-fit ​​joint can be understood as a region on the fastener specifically designed to engage with the snap-fit ​​component in shape. For example, a concave recess, an annular groove, a through-hole, or a convex step or protrusion can form an interlocking structure with the snap-fit ​​component.

[0010] The first and second positions mentioned above can be understood as two positions of the fastener relative to the fastener seat during rotation. The first position corresponds to the locking rotation position of the fastener, in which the snap-fit ​​engagement part is aligned with the snap-fit ​​part and forms a limit. The second position corresponds to the unlocking rotation position of the fastener, in which the snap-fit ​​engagement part and the snap-fit ​​part are offset in the circumferential direction by rotation to release the limit.

[0011] During installation, users simply insert the insertion part of the fastener into the mounting hole of the mounting base along its extension direction. Once inserted, when the fastener is in the first position, the snap-fit ​​engagement part is automatically limited by the fastener, achieving blind insertion and locking, making installation extremely convenient. During disassembly, simply rotate the fastener to the second position, and the snap-fit ​​engagement part will disengage from the fastener, allowing the oil mesh to be easily pulled out. This direct insertion locking and rotation unlocking operation method effectively prevents accidental contact and balances the firmness of the oil mesh installation connection with the convenience of disassembly.

[0012] Although the snap-fit ​​mechanism restricts the release of the insert fastener, there are still some issues. After the insert fastener is inserted, gaps inevitably exist between it and the inner wall of the mounting base or other components of the snap-fit ​​assembly, causing some wobbling. Furthermore, when the snap-fit ​​mechanism is released, the insert fastener may not automatically separate from the mounting hole due to oil residue or a tight fit, requiring the user to forcefully pull out the oil filter, making disassembly difficult. As an improvement, an ejector component is provided in the mounting base. When the insert fastener is in the mounting hole of the mounting base and the snap-fit ​​mechanism is in the first position, the snap-fit ​​mechanism engages with the snap-fit ​​joint of the insert fastener, preventing it from disengaging from the mounting hole. Simultaneously, the ejector component abuts against the insert fastener, giving it a tendency to disengage from the mounting hole. With the aforementioned ejector component, once the fastener is inserted, the ejector component abuts against the fastener, keeping it in a relatively stable state and preventing wobbling, while the latching component limits its movement against the fastener. Conversely, when the latching component is in the first position limiting the fastener, the ejector component continuously applies an outward pushing force, ensuring it always tends to disengage. Thus, once the user rotates the fastener to the second position to release the latching component, this pre-stored pushing force immediately ejects the fastener outward, achieving an automatic pop-out effect upon unlocking, greatly facilitating one-handed disassembly of the oil filter.

[0013] The aforementioned ejector component can be understood as a structural assembly capable of applying a force to the fastener in the direction of disengagement. For example, it can be an elastic assembly consisting of a spring and an ejector component, or it can be a component such as an elastic rubber column or spring sheet that stores energy and releases thrust.

[0014] The aforementioned "installation in place state" can be understood as the fastener reaching the preset correct working position after being inserted into the installation hole. In this state, the snap-fit ​​engagement part of the fastener is aligned with the snap-fit, allowing the snap-fit ​​to complete the locking action.

[0015] To simplify the installation structure of the ejector component, as an improvement, the mounting base has a movable channel corresponding to the inner end position of the mounting hole, communicating with the mounting hole. The ejector component includes an ejector element movably disposed in the movable channel and a first elastic element. The first elastic element acts on the ejector element, ensuring that the ejector element always tends to eject the fastener. By providing a movable channel communicating with the mounting hole inside the mounting base and placing the ejector element and the first elastic element therein, utilizing the elastic force as a pre-stored thrust, this built-in structure is compact, reliable, does not occupy external space, and provides a more stable and direct ejection force.

[0016] To ensure that the direction of the ejection force is precisely aligned with the insertion / extraction direction of the fastener, and to prevent jamming of the ejector or fastener due to force misalignment, thus affecting smooth ejection, an improvement is made: the movable channel and the mounting channel extend in the same straight direction. The ejector is movably constrained within the movable channel. The first elastic element is a first spring, which is located within the movable channel and abuts against the side of the ejector opposite to the mounting channel. By limiting the movable channel and the mounting channel to extend in the same straight direction, it is ensured that the thrust applied by the first spring to the ejector and the thrust exerted by the ejector on the fastener are entirely along the insertion / extraction axis of the fastener, resulting in maximum thrust efficiency, smoothest operation, and minimizing the risk of jamming.

[0017] To facilitate the smooth opening of the latching member during the insertion of the fastener into the mounting hole of the mounting base, and to directly release the latching engagement portion of the fastener from the latching member when the fastener is rotated to the second position, as an improvement, the end of the fastener's insertion portion is generally a flat conical structure, and the ejector is generally cylindrical, having a positioning groove that is axially concave at one end facing the fastener and adapted to the conical structure of the fastener. When the fastener is in the installed position in the mounting hole of the mounting base, and the latching member is in the first position, the conical portion of the fastener engages in the positioning groove. The insertion part is designed with a flat, conical end, and the ejector end is designed with a matching concave positioning groove. In the locked state, the conical head engages with the groove, which not only assists in centering and prevents rotation, making the lock more stable, but also, during rotation to unlock, the flat conical head presses against the ejector along the inclined surface of the positioning groove, causing the ejector to move backward and gradually compress the first elastic element, gradually accumulating elastic potential energy. During this process, the resistance to the rotation of the insertion fastener gradually increases, ensuring a good user feel. When the insertion fastener rotates to the second position, the elastic potential energy accumulated in the ejector reaches its maximum, and the snap-fit ​​engagement of the insertion fastener is released from the front and rear limits. Therefore, the insertion fastener can more quickly and directly disengage from the mounting hole, making the unlocking operation more convenient and faster.

[0018] The ejector may rotate along with the fastener within the movable channel, causing the positioning groove at its end to become misaligned. This prevents accurate alignment with the flat conical head of the fastener during subsequent insertions, leading to installation failure or jamming. As an improvement, a keyway fit structure is provided between the ejector and the inner wall of the movable channel to restrict the ejector's circumferential rotation. Specifically, two axially extending strip-shaped protrusions can be provided on opposite side walls of the ejector. Correspondingly, a sliding groove adapted to these strip-shaped protrusions is provided on the inner wall of the movable channel, extending along the length of the movable channel. This keyway fit structure restricts the circumferential rotational freedom of the ejector, ensuring that the positioning groove at its end always maintains the correct orientation. This guarantees precise engagement of both components with each insertion and rotation of the fastener, ensuring the long-term stability and reliability of the mechanism. The rear section of the ejector is set as a cylindrical section as a guide rod. The wall of the mounting base is provided with a guide hole that runs through the front and rear of the movable channel. The inner diameter of the guide hole is adapted to the outer diameter of the guide rod to limit the sliding of the guide rod.

[0019] To further optimize the fit between the cone and the positioning groove, making the cone structure of the fastener rotate out more smoothly, an improvement is made: the positioning groove at the end of the ejector is a V-shaped groove. During the rotation of the fastener from its first position to its second position, the cone portion of the fastener can disengage from the V-shaped groove and abut against the top of the ejector. This V-shaped groove design provides guidance for the flat cone with its two inclined surfaces. During the rotation of the fastener from the first position to the second position, the cone portion rises along one inclined surface of the V-shaped groove until it disengages and abuts against the top of the ejector. This process is smooth, effortless, and provides a clearer unlocking feel.

[0020] As an improvement, the section of the main body of the insertion part that connects to the conical structure is a cylindrical section. A stop step is constructed at the connection point between the cylindrical section and the conical structure. The area of ​​the cylindrical section of the insertion part corresponding to the stop step is the snap-fit ​​engagement part. By designing the insertion part as a cylindrical section connecting to the conical structure, and utilizing the difference in diameter between the two to naturally form a stop step, the cylindrical section area containing this stop step constitutes the snap-fit ​​engagement part of the insertion part. When the hook of the snap-fit ​​component engages with the step surface, it can firmly prevent the insertion component from disengaging.

[0021] The snap fastener is an extended plate that can be attached to the inner wall of the oil mesh using screws or other fasteners. The front of the snap fastener has a radially outward-protruding annular flange. When the snap fastener assembly is installed on the oil mesh, the snap fastener seat secures the snap fastener to the mesh by pressing against the annular flange. To limit the rotation angle of the snap fastener (i.e., to limit its rotation between the first and second positions), the outer periphery of the annular flange of the snap fastener has a rearward-protruding limiting post. An annular limiting groove is formed on the side of the snap fastener facing the inner wall of the oil mesh, where the limiting post is rotatably accommodated. During the rotation of the snap fastener seat, the limiting post abuts against the two ends of the annular limiting groove along its length, thereby defining two extreme positions for the snap fastener's rotation, namely the aforementioned first and second positions.

[0022] To ensure reliable movement and locking of the latching component within the limited space of the mounting base, and to maintain a more compact overall mounting structure, an improvement is made by defining and communicating a latching chamber in the side region of the mounting base located within the movable channel. The latching component is movably limited within this chamber and can move toward the movable channel to be in the locked position and toward the side away from the movable channel to be in the unlocked position. This latching chamber, located on the side of the movable channel of the mounting base, accommodates and guides the latching component, allowing it to move toward or away from the insert fastener within the movable channel. This arrangement allows for integration with the ejection mechanism into a single mounting body, resulting in a more compact overall structure for the latching assembly and providing stable movement guidance for the latching component.

[0023] To better ensure that the latching element automatically and reliably resets and remains locked when not pressed by the operating component, preventing accidental loosening due to vibration or other factors, a second elastic element is provided in the latching chamber as an improvement. This second elastic element acts on the latching element, causing it to tend to move from the unlocked position to the locked position. By providing a continuous force to the latching element through the second elastic element, it automatically resets from the unlocked position to the locked position when no external force is applied, achieving automatic engagement and locking when the latching element is inserted. It is conceivable that the latching element could also be an elastic element with its own elastic deformation capability, such as a spring sheet or an elastic rubber column, thus eliminating the need for the aforementioned second elastic element.

[0024] Considering that a single-sided snap-fit ​​structure may lead to uneven force distribution on the snap-fit ​​members, posing a risk of accidental dislodgement due to prying from one side, the connection is not sufficiently stable. As an improvement, the snap-fit ​​members are arranged symmetrically with respect to the mounting holes of the mounting base, and each snap-fit ​​member also has two corresponding snap-fit ​​engagement portions. Under the action of the corresponding second elastic element, the two snap-fit ​​members can approach each other and engage with the two snap-fit ​​engagement portions of the insertion part, and under the pressure of the operating element, they can move away from each other and disengage from the two snap-fit ​​engagement portions of the insertion part. Using two symmetrically arranged snap-fit ​​members and corresponding snap-fit ​​engagement portions allows for simultaneous locking of the insertion part from both sides. This symmetrical locking structure ensures balanced force distribution on the snap-fit ​​members, resulting in a more secure connection and stronger resistance to vibration and pull-out.

[0025] When installing the oil mesh, to ensure smoother and automatic opening of the fasteners without the need for tools or fingers to pre-operate on them, the mounting base features an insertion port on the side facing the fasteners for insertion into the movable channel. The side wall of the fastener facing the insertion port is designated as the first side wall, and the opposite side wall of the two fasteners is designated as the second side wall. A guide slope is constructed on the fasteners, smoothly transitioning from the first side wall to the second side wall. This smoothly transitioning guide slope creates a horizontal force when the insertion part of the fastener is inserted into the port and touches the guide slope, automatically pushing the two fasteners apart without manual intervention. Once the insertion part is fully inserted, the fasteners automatically reposition themselves under the action of an elastic element, locking into the engagement part, achieving automatic locking installation. The fastener has an outwardly protruding limiting edge, and a limiting stop edge is located at the connection port between the fastener chamber and the movable channel. This limiting stop edge can limit the movement of the fastener towards the movable channel, thus defining the extreme position of the fastener's movement towards the movable channel. Generally, when the two fasteners reach their extreme positions towards the movable channel, they can either abut against each other or be spaced apart. However, the distance between them cannot be too large, lest the stop step of the fastener disengages from the fastener.

[0026] To facilitate easy rotation and unlocking of the inner fastener from the outside of the oil mesh without compromising its integrity and aesthetics, an improvement is made by including an operating knob. The fastener and buckle base are located inside the oil mesh, while the operating knob is located outside and connected to the fastener. With the operating knob on the outside of the oil mesh and connected to the inner fastener, the user only needs to turn the knob on the outside of the oil mesh to rotate the inner fastener between a first and second position, achieving internal and external linkage. This makes disassembly and removal intuitive and convenient, eliminating the need for the user to touch the greasy internal parts. The operating knob and fastener can be connected by a snap-fit ​​method. For example, the fastener has a protrusion at its front end, which is rotatably installed in a corresponding mounting opening on the oil mesh. The fastener also has a insertion hole extending rearward from the front end of the protrusion. A insertion post is located at the center of the rear side of the operating knob, and this post is snap-fitted into the insertion hole of the protrusion.

[0027] Generally, the fastener can be manually rotated to return from the second position to the first position. However, manual operation has some drawbacks. For example, after unlocking and removing the oil filter using the knob, the fastener may remain in the second position. If the user forgets to turn the knob back before reinstalling, the fastener will be inserted directly in the second position, preventing automatic locking and causing installation failure or even damage to the fastener. As an improvement, a third elastic element is included. This third elastic element acts on the fastener, ensuring it always tends to rotate from the second position to the first position. By incorporating this third elastic element, the fastener automatically returns to the first position. This ensures that when the user releases the knob or removes the oil filter, the fastener automatically returns to the first position, guaranteeing immediate locking during the next installation and keeping the knob in the same position under normal conditions, resulting in a cleaner appearance and more reliable operation.

[0028] The technical solution adopted by the present invention to solve the second technical problem is as follows: a fume extraction device, including a fume hood with an air inlet and an oil mesh, the oil mesh being installed at the air inlet of the fume hood, and also including the oil mesh mounting structure for the fume extraction device described above. The edge of the air inlet of the fume hood has a mounting extension plate extending toward the center of the air inlet. The mounting seat of the buckle assembly is installed on the side of the mounting extension plate facing the inside of the fume hood. The mounting extension plate also has a first opening for the buckle to pass through and enter the mounting hole of the mounting seat.

[0029] To simplify the installation structure of the oil mesh, as an improvement, the oil mesh has opposing first and second sides. The first side has outwardly extending prongs, and the oil mesh is provided with a snap-fit ​​assembly adjacent to its second side. The edge of the air inlet of the fume hood is provided with a slot for inserting the prongs and the snap-fit ​​assembly. This combination of prong-and-slot structure and snap-fit ​​assembly for fixing allows for quick pre-positioning and load-bearing during installation. Then, the other end is snapped into the snap-fit ​​assembly for final locking. The installation steps are convenient and easy to operate, further reducing installation difficulty and improving the overall reliability of the fixation. It is conceivable that corresponding snap-fit ​​assemblies could also be provided on both the first and second sides of the oil mesh, with corresponding snap-fit ​​assemblies provided at the corresponding positions on the mounting base.

[0030] In this invention, the term "movably mounted" can be understood as meaning that after one component is mounted on another, it is constrained to move or slide within a certain range, rather than being completely fixed. For example, the latching component can move horizontally within the latching cavity, and the operating component can slide within the limiting slide.

[0031] The first / second / third elastic element of the present invention can refer to a part that stores energy and provides force through elastic deformation, such as a helical spring (compression spring, tension spring), torsion spring, leaf spring, disc spring, or elastic column made of elastic materials such as rubber and silicone.

[0032] Compared with existing technologies, the advantages of this invention are as follows: The oil filter installation structure of the present invention addresses the problems of existing technologies where oil filter disassembly requires forcibly overcoming spring force, is laborious, and prone to damage. By setting the fastener as a rotatable structure with the rotation axis aligned with the insertion direction, the disassembly process is greatly simplified. When the oil filter needs to be removed, the user only needs to rotate the fastener from the first position to the second position, and the snap-fit ​​engagement part disengages from the fastener, releasing the limit. At this point, the fastener can be easily pulled out of the installation hole. The entire process is simple to operate, eliminating the need for forceful pulling to overcome the strong spring clamping force required by traditional structures. The operating force is significantly reduced, and the action is light and convenient, effectively avoiding the risk of component damage or user injury due to excessive force. This significantly improves the ease of operation and safety of oil filter disassembly, enhancing the user experience. Attached Figure Description

[0033] Figure 1 This is a three-dimensional structural diagram of a range hood according to an embodiment of the present invention, showing only the smoke collection hood;

[0034] Figure 2 This is a three-dimensional structural diagram of a range hood according to an embodiment of the present invention, showing only the smoke collection hood and the oil filter in a separated state;

[0035] Figure 3 This is a three-dimensional structural diagram of the oil mesh according to an embodiment of the present invention;

[0036] Figure 4 This is an exploded view of the oil mesh according to an embodiment of the present invention;

[0037] Figure 5 This is an exploded view of the snap-fit ​​assembly of the oil mesh according to an embodiment of the present invention;

[0038] Figure 6 This is a three-dimensional structural diagram of the smoke collection hood of the range hood according to an embodiment of the present invention after the oil filter is removed;

[0039] Figure 7 This is an exploded view of the buckle assembly on the smoke collection hood of the range hood according to an embodiment of the present invention;

[0040] Figure 8 This is a three-dimensional structural diagram of the buckle assembly according to an embodiment of the present invention;

[0041] Figure 9 This is an exploded view of the snap-fit ​​assembly according to an embodiment of the present invention;

[0042] Figure 10 This is a three-dimensional structural diagram of the ejector component according to an embodiment of the present invention;

[0043] Figure 11 This is a three-dimensional structural diagram of the mounting base according to an embodiment of the present invention;

[0044] Figure 12 This is a perspective sectional view of the buckle assembly of an embodiment of the present invention, with the buckle in the first position.

[0045] Figure 13 This is a perspective sectional view of the buckle assembly of an embodiment of the present invention, with the buckle in the second position. Detailed Implementation

[0046] The specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0047] The fume extraction device of this invention refers to a kitchen product with the function of extracting and exhausting fumes. This can refer to a traditional range hood, or other kitchen products with fume extraction capabilities (such as those integrated with a fume extraction module), such as integrated cooktops, lift-up / built-in countertop range hoods, portable / tabletop fume purifiers, integrated cooking centers, and other products or systems. This embodiment uses a range hood as an example to illustrate the oil filter installation structure used in the fume extraction device.

[0048] Existing range hoods often use a snap-fit ​​connection structure for detachable installation of the oil filter 2. This type of structure relies on the spring force to keep the clips and snap-fit ​​tightly engaged, resulting in a relatively large engagement force. When removing the oil filter 2, users need to overcome significant spring resistance and forcibly pull it off, making the disassembly process laborious and prone to causing damage to components or injury to the user due to excessive force. To solve the above technical problems, this application provides an oil filter installation structure for a range hood. In this structure, the snap fastener 32 is rotatable relative to the snap fastener seat 31, and the extension direction of the rotation axis 320 of the snap fastener 32 is consistent with the insertion direction of the insertion part 321 of the snap fastener 32. The snap fastener 32 has a first position and a second position as its rotation position changes. In the first position, the latching member 14 and the latching engagement part 3210 of the snap fastener 32 form a limiting engagement to prevent the snap fastener 32 from falling out. In the second position, the latching engagement part 3210 disengages from the latching member 14 to allow the snap fastener 32 to fall out. Since the fastener 32 switches between locking and unlocking by rotation, the limit of the latch 14 can be released by simply rotating the fastener 32 when unlocking. Unlike traditional structures, there is no need to forcibly pull to overcome the spring locking force, thus making the disassembly process light and convenient. This effectively avoids the risk of component damage or user injury caused by excessive force, and significantly improves the ease of operation and safety of disassembling the oil mesh 2.

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

[0050] Figures 1-13This invention illustrates an oil filter mounting structure for a fume extraction device and a preferred embodiment of the fume extraction device. This embodiment provides an oil filter mounting structure for a fume extraction device, which has a mounting base for mounting the oil filter 2. This mounting base refers to a structural part on the fume extraction device used to fix and support the snap-fit ​​assembly. It can be an opening area on the corresponding side wall of the fume hood 1, a bracket or reinforcing rib extending outward from the wall of the fume hood 1, or a slot structure specifically provided on the fume hood 1 for mounting the snap-fit ​​assembly. The aforementioned fume extraction device refers to a kitchen product with fume extraction and exhaust functions. It can be a traditional range hood or other kitchen products with fume extraction functions, such as integrated cooktops, lift-up or built-in countertop range hoods, portable or countertop fume purifiers, integrated cooking centers, etc. The following description uses a range hood as an example to illustrate the oil filter mounting structure of this embodiment.

[0051] The oil mesh installation structure of the fume extraction device in this embodiment includes a snap-fit ​​assembly and a snap-fit ​​assembly 3.

[0052] See Figures 6-11 The latching assembly is mounted on the mounting base of the fume extraction device. The latching assembly includes a mounting base 13 and a latching member 14. The mounting base 13 has a mounting channel 131 that extends axially through the mounting base 13 for inserting the insertion portion 321 of the latching member 32. The mounting base 13 also has a chamber or slide structure for accommodating the latching member 14. The latching member 14 is movably mounted on the mounting base 13. Specifically, the latching member 14 can be slidably mounted in a pre-set slide within the mounting base 13, or it can be constrained within the chamber of the mounting base 13 and movable relative to the chamber. The latching member 14 can move between a locked position and an unlocked position, and it always tends to move from the unlocked position towards the locked position. The phrase "movably mounted" means that after the latching member 14 is mounted on the mounting base 13, it is constrained to move or slide within a certain range, rather than being completely fixed. The latching member 14 always tends to move from the unlocked position to the locked position. This can be achieved by providing an elastic element between the latching member 14 and the mounting base 13. One end of the elastic element abuts against the mounting base 13, and the other end abuts against the latching member 14. The elastic restoring force generated after the elastic element is compressed drives the latching member 14 to move towards the locked position. Alternatively, the latching member 14 can be an elastic element with its own elastic deformation capability, such as a spring sheet or an elastic rubber column, whose own elastic restoring force drives the latching member 14 to move towards the locked position. The locked position is the position where the latching member 14 can form a limiting engagement with the latching engagement portion 3210 of the insert fastener 32. In this position, the latching member 14 extends into the mounting channel 131 to prevent the insert fastener 32 from disengaging. The unlocked position is the position where the latching member 14 releases its limiting effect on the insert fastener 32. In this position, the latching member 14 exits the mounting channel 131 to allow the insert fastener 32 to disengage freely.

[0053] See Figures 3-5 The snap-fit ​​assembly 3 is disposed on the oil mesh 2. The snap-fit ​​assembly 3 includes a snap-fit ​​base 31 and a snap-fit ​​member 32. The snap-fit ​​base 31 is used to connect with the oil mesh 2. The snap-fit ​​base 31 can be fixed to the inner wall of the oil mesh 2 by fasteners such as screws and rivets, or it can be integrally formed with the oil mesh 2 or welded to it. The snap-fit ​​member 32 is rotatably disposed on the snap-fit ​​base 31. Specifically, the snap-fit ​​member 32 can be rotatably inserted into the snap-fit ​​base 31 with its own axis as the center of rotation. The snap-fit ​​member 32 has an insertion portion 321 extending outward relative to the snap-fit ​​base 31. This insertion portion 321 can be inserted into the mounting hole 131 of the mounting base 13. The shape of the insertion portion 321 can be cylindrical, prismatic, or other shapes that can be inserted into the mounting hole 131. The insertion part 321 of the fastener 32 has a snap-fit ​​engagement part 3210. The snap-fit ​​engagement part 3210 is a region on the fastener 32 specially designed to engage with the snap-fit ​​part 14. It can be a concave recess, an annular groove, a through hole, or a convex step or protrusion. The snap-fit ​​part 14 can extend into the snap-fit ​​engagement part 3210 to form an interlocking structure.

[0054] The extension direction of the rotation axis 320 of the fastener 32 relative to the fastener seat 31 is consistent with the insertion direction of the fastener 32's insertion portion 321, as detailed in [link to details]. Figure 3 Here, "consistent" means that the extension direction of the rotation axis 320 is parallel or approximately parallel to the insertion direction of the insertion part 321. That is, the fastener 32 rotates around the axis containing its own length, or in other words, the rotation axis 320 of the fastener 32 is coaxial with the direction of its insertion into the mounting hole 131. Because the rotation axis 320 is consistent with the insertion direction, the rotation of the fastener 32 during insertion into the mounting hole 131 and within the mounting hole 131 does not occupy additional radial space, thus making the overall structure more compact.

[0055] Combination Figure 12 and Figure 13 The fastener 32 has a first position and a second position as its rotational position relative to the fastener base 31 changes. The first position and the second position are two different angular positions of the fastener 32 during its rotation relative to the fastener base 31. The first position corresponds to the locking rotational position of the fastener 32, in which the latching engagement portion 3210 and the fastener 14 are aligned in the circumferential direction, so that the fastener 14 can be engaged in the latching engagement portion 3210 to form a limit. The second position corresponds to the unlocking rotational position of the fastener 32, in which the latching engagement portion 3210 and the fastener 14 are offset in the circumferential direction, so that the fastener 14 cannot be engaged in the latching engagement portion 3210, or the fastener 14 can be disengaged from the latching engagement portion 3210 to release the limit.

[0056] When the fastener 32 is in the first position, the latching member 14 and the latching engagement portion 3210 of the fastener 32 form a limiting engagement, preventing the fastener 32 from disengaging from the mounting channel 131. Specifically, when the fastener 32 is inserted into the mounting channel 131 and is in the first position, the latching member 14 extends into the mounting channel 131 under the action of elastic force and engages with the latching engagement portion 3210 of the fastener 32. Since the latching member 14 and the latching engagement portion 3210 form an abutment in the disengagement direction of the fastener 32, the fastener 32 is prevented from disengaging from the mounting channel 131. When the fastener 32 is in the second position, the latching engagement portion 3210 of the fastener 32 disengages from the latching member 14, releasing the limiting of the fastener 32 and allowing the fastener 32 to disengage from the mounting channel 131. Specifically, when the fastener 32 rotates from the first position to the second position, the latching engagement portion 3210 rotates together with the fastener 32, deviating from the position of the latching member 14 in the circumferential direction. The latching member 14 exits from the latching engagement portion 3210 or can no longer be latched into the latching engagement portion 3210, thereby releasing the restriction on the fastener 32 in the disengagement direction, and the fastener 32 can be freely pulled out from the mounting hole 131.

[0057] The usage process of the oil mesh installation structure in this embodiment is as follows: During installation, the insertion part 321 of the fastener 32 is directly inserted into the installation hole 131 of the mounting base 13 along its extension direction. After insertion, the fastener 32 is in the first position, and the latching part 14 automatically engages with the latching engagement part 3210 to achieve locking. The entire installation process is a blind insertion operation, without the need for additional alignment or manual adjustment of the latching part 14, making installation extremely convenient. During disassembly, simply rotate the fastener 32 around its axis to the second position, causing the latching engagement part 3210 to disengage from the latching part 14, and the fastener 32 can be easily pulled out of the installation hole 131. The entire disassembly process does not require forceful pulling, making the operation light and effortless.

[0058] In some optional embodiments, to make the fastener 32 more stable in the locked state, prevent shaking, and automatically pop out when unlocked to further improve disassembly convenience, the oil mesh mounting structure also includes an ejector member disposed in the mounting base 13. The ejector member is a structural component capable of applying a force to the fastener 32 in the disengagement direction. It can be an elastic component consisting of a spring and an ejector member 151, or a component that stores energy and releases thrust, such as an elastic rubber column or spring sheet. When the fastener 32 is in the installed position in the mounting hole 131 of the mounting base 13, and the latching member 14 is in the first position, the latching member 14 engages with the latching engagement portion 3210 of the fastener 32, restricting the fastener 32 from disengaging from the mounting hole 131. Simultaneously, the ejector member abuts against the fastener 32, causing the fastener 32 to tend to disengage from the mounting hole 131. Here, "installed in position" means that after the fastener 32 is inserted into the installation hole 131, it reaches the preset correct working position. In this state, the snap-fit ​​joint 3210 of the fastener 32 is aligned with the snap-fit ​​14, allowing the snap-fit ​​14 to complete the locking action. After setting the above-mentioned ejector component, in the locked state, the ejector component abuts against the fastener 32 and applies an outward pushing force to the fastener 32, so that the fastener 32 is pressed tightly onto the snap-fit ​​14, eliminating the gap between the fastener 32 and the inner wall of the installation hole 131, and preventing the oil mesh 2 from shaking during use. When unlocking, after the fastener 32 rotates to the second position to release the limit of the snap-fit ​​14, the pre-stored pushing force of the ejector component immediately pushes the fastener 32 outward, achieving the effect of automatic pop-out upon unlocking. The user can complete the disassembly operation of the oil mesh 2 with one hand, further improving the convenience of use.

[0059] For the specific installation structure of the ejector component, see [link / reference]. Figures 7 to 11 The mounting base 13 has a movable channel 133 corresponding to the inner end position of the mounting channel 131, which communicates with the mounting channel 131. The movable channel 133 is a channel structure provided inside the mounting base 13, which communicates with the mounting channel 131 and is used to accommodate the ejector member. The ejector member includes an ejector 151 movably disposed in the movable channel 133 and a first elastic member 152. The ejector 151 can be a columnar block, a piston-like structure, or other shaped member that can move in the movable channel 133. The first elastic member 152 acts on the ejector 151 and makes the ejector 151 always tend to eject the fastener 32. The first elastic member 152 can be a coil spring, a spring sheet, or a rubber elastic column, etc. By providing an active channel 133 inside the mounting base 13 that communicates with the mounting channel 131, and placing the ejector 151 and the first elastic member 152 therein, this built-in structure is compact, reliable, does not occupy external space, and the ejection force is more stable and direct.

[0060] To ensure that the direction of the ejection force is precisely aligned with the insertion or disengagement direction of the fastener 32, and to prevent jamming of the ejector 151 or fastener 32 due to force misalignment, please refer to... Figures 9 to 11 Preferably, the movable channel 133 and the mounting channel 131 extend in the same straight direction. That is, the central axis of the movable channel 133 coincides with or substantially coincides with the central axis of the mounting channel 131, such that the movement direction of the ejector 151 in the movable channel 133 is collinear with the insertion or disengagement direction of the fastener 32 in the mounting channel 131. The ejector 151 is movably constrained in the movable channel 133. The first elastic element 152 is a first spring, which is disposed in the movable channel 133 and abuts against the side of the ejector 151 opposite to the mounting channel 131. One end of the first spring abuts against the inner end wall of the movable channel 133, and the other end abuts against the end face of the ejector 151 opposite to the mounting channel 131. The elastic restoring force generated after the first spring is compressed pushes the ejector 151 to move towards the mounting channel 131. By limiting the extension of the movable channel 133 and the mounting channel 131 to the same straight direction, it is ensured that the thrust applied by the first spring to the ejector 151 and the thrust of the ejector 151 to the fastener 32 are entirely along the insertion and extraction axis of the fastener 32. This maximizes thrust efficiency, ensures smooth operation, and minimizes the risk of jamming. It is conceivable that in other embodiments, the extension direction of the movable channel 133 can also be at a certain angle to the extension direction of the mounting channel 131, for example, they can be set perpendicularly. The corresponding ejector 151 and fastener 32 are engaged by a bevel, so that the movement of the ejector 151 along the movable channel 133 is converted into a thrust on the fastener 32 along the axial direction of the mounting channel 131.

[0061] To optimize the smoothness of the insertion part 321 opening the latching member 14 during insertion and the smoothness of the latching engagement part 3210 releasing from the latching member 14 during rotation unlocking, as a preferred embodiment, see [reference needed]. Figure 5 , Figure 12 and Figure 13 The end of the insertion portion 321 of the fastener 32 is generally a flat conical structure 3211. This conical structure 3211 has two opposing flat surfaces (the two flat surfaces are equidistant in one direction perpendicular to the length of the fastener 32), making the conical head generally flat. The conical structure 3211 forms two intersecting inclined surfaces corresponding to its flat outer contour. The ejector 151 is generally cylindrical, having a positioning groove 1511 at one end facing the insertion portion 321 that is axially concave and adapted to the conical structure 3211 of the insertion portion 321, as detailed in [link to details]. Figure 10The shape of the positioning groove 1511 matches the shape of the cone head structure 3211, allowing the cone head to engage in the positioning groove 1511. When the insert fastener 32 is in the mounting hole 131 of the mounting base 13 and the latching member 14 is in the first position, the cone head of the insert part 321 engages in the positioning groove 1511. The end of the insert part 321 is designed as a flat cone head structure 3211, and the end of the ejector 151 is designed as a matching concave positioning groove 1511. In the locked state, the cone head engages in the groove, which helps to center and prevent rotation, making the lock more stable. When rotating to unlock, the flat cone head slides smoothly out along the slope of the positioning groove 1511 and presses against the ejector 151, causing the ejector 151 to move backward and gradually compress the first elastic member 152, gradually accumulating elastic potential energy. During this process, the resistance to the rotation of the insert fastener 32 gradually increases, providing a clear operating feel. When the fastener 32 is rotated to the second position, the elastic potential energy accumulated by the ejector 151 reaches its maximum, and the latching engagement 3210 of the fastener 32 is released from the front and rear limit of the latching member 14. The fastener 32 can be released from the mounting hole 131 more quickly and directly, making the unlocking operation more convenient and faster.

[0062] To ensure that the ejector 151 does not rotate within the movable channel 133 as the fastener 32 rotates, and thus to ensure that the positioning groove 1511 always maintains the correct orientation for accurate alignment with the flat conical head of the fastener 32, preferably, see [reference needed]. Figure 10 and Figure 11 A keyway fit structure is also provided between the ejector 151 and the inner wall of the movable channel 133 to restrict the circumferential rotation of the ejector 151. In a preferred embodiment, strip-shaped protruding keys 1512 extending axially are provided on the two opposite side walls of the ejector 151. Correspondingly, a sliding groove 1330 adapted to the strip-shaped protruding key 1512 is provided on the inner wall of the movable channel 133. The sliding groove 1330 extends along the length direction of the movable channel 133. The keyway fit structure restricts the circumferential rotational freedom of the ejector 151, ensuring that the positioning groove 1511 at its end always maintains the correct orientation. This ensures that both parts can precisely fit each time the fastener 32 is inserted and rotated, ensuring the long-term stability and reliability of the mechanism. Furthermore, the rear section of the ejector 151 is configured as a cylindrical section as a guide rod 1514. A guide hole 1331 is provided on the wall of the mounting base 13 corresponding to the rear end of the movable channel 133. The inner diameter of the guide hole 1331 is adapted to the outer diameter of the guide rod 1514 so that the guide rod 1514 can slide back and forth within it.

[0063] To further optimize the fit between the cone head and the positioning groove 1511, and to make the cone head structure 3211 of the fastener 32 rotate out more smoothly, as a preferred option, see [reference needed]. Figure 10 , Figure 12 and Figure 13 The positioning groove 1511 at the end of the ejector 151 is a V-shaped groove. The V-shaped groove has two inclined groove walls, and the included angle between the two groove walls forms a V shape. During the rotation of the fastener 32 from its first position to its second position, the conical part of the fastener 32 can disengage from the V-shaped groove and abut against the top 1515 of the ejector 151. The end of the ejector 151 preferably adopts an axially hollow annular wall structure, with two symmetrically arranged V-shaped grooves, and the two inclined parts of the conical part of the fastener 32 abut against the two V-shaped grooves respectively. The top 1515 of the ejector 151, that is, the part on the end face of the annular wall extending around the periphery, located between the two V-shaped grooves, is set as a planar structure. Thus, after the conical part of the fastener 32 slides out of the V-shaped groove, it can just maintain abutting against the plane of the top of the ejector 151, avoiding retraction into the V-shaped groove. The V-groove design provides guidance for the flat cone head through its two bevels. As the buckle 32 rotates from the first position to the second position, the cone head rises along one bevel of the V-groove until it disengages and abuts against the top of the ejector 151. This process is smooth and effortless, providing a clearer feel for unlocking.

[0064] See Figure 5 The section of the main body of the insertion part 321 that connects to the conical structure 3211 is a cylindrical section 3212. A stop step 3213 is constructed at the connection point between the cylindrical section 3212 and the conical structure 3211. Since the outer diameter of the cylindrical section 3212 is smaller than the radial dimension of the root of the conical structure 3211, a radial step surface is naturally formed at the connection point between the two, and this step surface is the stop step 3213. The area of ​​the cylindrical section 3212 of the insertion part 321 corresponding to the stop step 3213 is the snap-fit ​​engagement part 3210. When the snap-fit ​​member 14 is in the locked position, the end of the snap-fit ​​member 14 engages with the stop step 3213, forming an abutment with the stop step 3213 in the disengagement direction of the snap-fit ​​member 32, thereby firmly preventing the snap-fit ​​member 32 from disengaging. By designing the insertion part 321 as a cylindrical section 3212 connected to the conical structure 3211, and utilizing the diameter difference between the two to naturally form a stop step 3213, the structure is simple and the positioning is reliable.

[0065] In order to facilitate the rotation and unlocking of the inner buckle 32 from the outside of the oil mesh 2 without compromising the integrity and aesthetics of the oil mesh 2, see [reference needed]. Figure 4 and Figure 5The oil mesh installation structure of this embodiment also includes an operating knob 33. A snap-fit ​​seat 31 and a snap-fit ​​member 32 are arranged inside the oil mesh 2, while the operating knob 33 is arranged outside the oil mesh 2 and connected to the snap-fit ​​member 32. Specifically, the front end of the snap-fit ​​member 32 is provided with an annular flange 3214 and a protruding post 3216 protruding forward from the middle of the annular flange 3214. During installation, the snap-fit ​​seat presses against the annular flange 3214 to fix the snap-fit ​​member 32 to the oil mesh, while the protruding post 3216 rotatably passes through the corresponding installation opening 20 on the oil mesh 2. The snap-fit ​​member 32 also has a insertion hole 3217 extending rearward from the front end of the protruding post 3216. The rear center of the operating knob 33 is provided with a snap post 331, which is tightly inserted into the insertion hole 3217 of the protruding post 3216, thereby achieving a coaxial fixed connection between the operating knob 33 and the snap-fit ​​member 32. An operating knob 33 is set on the outside of the oil mesh 2 and connected to the buckle 32 on the inside. The user only needs to turn the knob on the outside of the oil mesh 2 to drive the buckle 32 inside to rotate between the first position and the second position, realizing the linkage between the inside and outside.

[0066] In some embodiments, the oil mesh installation structure further includes a third elastic element 34. The third elastic element 34 acts on the latch 32 and causes the latch 32 to always tend to rotate from the second position to the first position. The third elastic element 34 can be a torsion spring, a coil spring, or other elastic element capable of providing rotational restoring force. In one specific embodiment, the third elastic element 34 is a torsion spring, which is sleeved on the latch 32. One end of the torsion spring is connected to the latch seat 31, and the other end is connected to the latch 32. The elastic restoring force of the torsion spring drives the latch 32 to rotate towards the first position. After the third elastic element 34 is set, when the user releases the knob or removes the oil mesh 2, the latch 32 will automatically return to the first position, ensuring the plug-and-lock function during the next installation. It also ensures that the knob is always in the same position under normal conditions, making it visually cleaner and more reliable in operation.

[0067] See Figure 5 To limit the rotation angle of the fastener 32, i.e., to limit the rotation of the fastener 32 between the first position and the second position, preferably, the outer peripheral edge of the annular protrusion 3214 of the fastener 32 is provided with a rearwardly protruding limiting post 3215, and the fastener seat 31 has an arc-shaped limiting groove 311 on the side facing the inner wall of the oil mesh 2, in which the limiting post 3215 is rotatably accommodated. During the rotation of the fastener 32, the limiting post 3215 will abut against the two ends of the arc-shaped limiting groove 311 in the length direction, thereby defining the two extreme positions of the rotation of the fastener 32, namely the first position and the second position mentioned above.

[0068] To ensure reliable movement and locking of the latching element 14 within the limited space inside the mounting base 13, and to guarantee a more compact overall mounting structure, see [reference needed]. Figures 7 to 9 Preferably, the mounting base 13 defines a snap-fit ​​chamber 132 communicating with the movable channel 133 in the side region of the movable channel 133. The snap-fit ​​member 14 is movably limited within the snap-fit ​​chamber 132 and can move toward the location of the movable channel 133 to be in a locked position and move away from the movable channel 133 to be in an unlocked position. The snap-fit ​​chamber 132 may be a channel or slot formed inside the mounting base 13 that intersects the movable channel 133 perpendicularly or obliquely. The snap-fit ​​member 14 is constrained in the snap-fit ​​chamber 132 and can only move along the guide direction of the snap-fit ​​chamber 132. When the latching member 14 moves toward the movable channel 133, its end extends into the movable channel 133, forming a limiting engagement with the latching engagement portion 3210 of the insert fastener 32 inserted into the movable channel 133; when the latching member 14 moves away from the movable channel 133, its end exits the movable channel 133, releasing the limiting effect on the insert fastener 32. This arrangement integrates the latching member 14 and the ejection mechanism into a single housing, making the overall structure of the entire latching assembly more compact and providing stable movement guidance for the latching member 14.

[0069] See Figure 9 and Figure 12 To ensure that the latching member 14 can automatically and reliably reset and remain locked when not subjected to external force, and to prevent accidental loosening due to vibration or other factors, in some embodiments, the latching chamber 132 is also provided with a second elastic element 144. This second elastic element 144 acts on the latching member 14, causing it to tend to move from the unlocked position to the locked position. The second elastic element 144 can be a coil spring, a spring sheet, or an elastic rubber column, etc. In one specific embodiment, the second elastic element 144 is a second spring, with one end abutting against the inner wall of the latching chamber 132 and the other end abutting against the latching member 14. The elastic restoring force generated after the second spring is compressed pushes the latching member 14 towards the movable channel 133. By providing a continuous force to the latching member 14 with the second elastic element 144, it can automatically reset from the unlocked position to the locked position when not subjected to external force, thus achieving automatic engagement and locking when the fastener 32 is inserted. It is conceivable that the fastener 14 can also be an elastic element with its own elastic deformation capability, such as a spring sheet or an elastic rubber column, in which case the independent second elastic element 144 can be omitted.

[0070] Considering that a single-sided latching structure may cause uneven force on the latching member 32, potentially leading to accidental dislodgement due to prying from one side, it is preferable that two latching members 14 are symmetrically arranged relative to the mounting holes 131 of the mounting base 13, and two corresponding latching engagement portions 3210 on the latching member 32 are also provided. The two latching members 14 are respectively located on both sides of the mounting holes 131. Under the action of the corresponding second elastic member 144, the two latching members 14 can move closer together and engage with the two latching engagement portions 3210 of the insertion post, and under the pressure of the operating member, they can move away from each other and disengage from the two latching engagement portions 3210 of the insertion post. By using two symmetrically arranged latching members 14 and corresponding latching engagement portions 3210, the insertion post can be locked simultaneously from both sides. This symmetrical locking structure ensures balanced force on the latching member 32, resulting in a more secure connection and stronger resistance to vibration and pull-out. The operating component here refers to the part used to push the latch 14 to the unlock position, which can be a manually operated button, lever, or knob, etc.

[0071] To ensure that the fastener 32 can smoothly and automatically open the latching member 14 during the installation of the oil mesh 2 without requiring tools or fingers to pre-operate the latching member 14, preferably, the mounting base 13 has an insertion port 1300 on the side facing the fastener 32 for inserting the fastener 32 into the movable channel 133. The side wall of the latching member 14 facing the insertion port 1300 is designated as the first side wall 141, and the side wall opposite the two latching members 14 is designated as the second side wall 143. A guide slope 142 is constructed on the latching member 14, smoothly transitioning from the first side wall 141 to the second side wall 143. The guide slope 142 is an inclined surface extending slopingly from the first side wall 141 to the second side wall 143. When the insertion part 321 of the fastener 32 is inserted into the socket 1300 and touches the guide slope 142, the end of the insertion part 321 acts on the guide slope 142. Due to the inclination of the guide slope 142, the force exerted by the insertion part 321 on the latching member 14 will generate a horizontal component force, pushing the latching member 14 away from the movable channel 133. As the insertion part 321 continues to penetrate, the two latching members 14 are gradually spread apart. When the insertion part 321 is fully in place, the latching engagement part 3210 moves to a position directly opposite the latching member 14. Under the action of the second elastic member 144, the latching member 14 automatically resets and engages in the latching engagement part 3210, realizing automatic locking installation. The guide slope 142 makes the entire installation process unnecessary for the user to manually move the latching member 14, truly realizing the convenience of blind insertion installation.

[0072] Specifically, the mounting base 13 has a removable cover plate 130 on the side facing the fastener 32, and the cover plate 130 has the aforementioned insertion slot 1300. After the ejector component of the latching assembly, the latching assembly, and other components are installed into the mounting base 13, they are closed by the cover plate 130. The side of the mounting base 13 where the cover plate 130 is located has a flat structure, which allows it to be easily attached to the mounting extension plate 11 at the air inlet 10 of the smoke hood 1, as detailed in [link to details]. Figure 6 and Figure 9 .

[0073] Further, see Figure 9 and Figure 11 The latching member 14 has an outwardly protruding limiting flange 145, and a limiting stop 1321 is located at the communication port connecting the latching chamber 132 and the movable channel 133. This limiting stop 1321 can limit the limiting flange 145 in the direction of movement of the latching member 14 toward the movable channel 133, that is, limit the extreme position of the movement of the latching member 14 toward the movable channel 133, and prevent the latching member 14 from getting stuck or damaged due to excessive insertion into the movable channel 133. Generally speaking, when the two latching members 14 move toward the extreme position of the movable channel 133, the two latching members 14 can abut against each other or be separated by a certain distance, but the distance between them cannot be too large so as to cause the latching member 14 to disengage from the stop step 3213.

[0074] This embodiment also provides a fume extraction device. Taking a range hood as an example, the range hood includes a fume collection hood 1 with an air inlet 10 and an oil filter 2. The oil filter 2 is installed at the air inlet 10 of the fume collection hood 1. The range hood also includes the oil filter mounting structure for the fume extraction device described above. The edge of the air inlet 10 of the fume collection hood 1 has a mounting extension plate 11 extending toward the center of the air inlet 10. The mounting extension plate 11 is a plate-shaped structure that extends horizontally or obliquely from the edge of the air inlet 10 toward the interior of the air inlet 10. The mounting seat 13 of the snap-fit ​​assembly is installed on the side of the mounting extension plate 11 facing the interior of the fume collection hood 1. Specifically, the mounting seat 13 can be fixed to the lower surface of the mounting extension plate 11 by screws or rivets. The mounting extension plate 11 is also provided with a first opening 110 for the fastener 32 to pass through and enter the mounting hole 131 of the mounting base 13. The position of the first opening 110 corresponds to the entrance position of the mounting hole 131 of the mounting base 13, so that the fastener 32 can pass through the mounting extension plate 11 from the oil mesh 2 side and enter the mounting hole 131 of the mounting base 13.

[0075] To simplify the installation structure of the oil mesh 2 and further improve installation convenience, the oil mesh 2 preferably has opposing first and second sides. The first side has outwardly extending pins 21, which are sheet-like or columnar structures protruding outward from the first side of the oil mesh 2. A snap-fit ​​assembly 3 is provided near the second side of the oil mesh 2. The edge of the air inlet 10 of the smoke hood 1 is provided with a slot 12 for inserting the pins 21 and the aforementioned snap-fit ​​assembly. The slot 12 is located on the edge of the air inlet 10 corresponding to the first side of the oil mesh 2, and the snap-fit ​​assembly is located on the edge of the air inlet 10 corresponding to the second side of the oil mesh 2. When installing the oil mesh 2, the pins 21 of the first side of the oil mesh 2 can be quickly pre-positioned by inserting them into the slot 12 on the edge of the air inlet 10 of the smoke hood 1, thus supporting the first side of the oil mesh 2. Then, the second side of the oil mesh 2 is pushed upwards, locking the snap-fit ​​assembly 3 into place with the snap-fit ​​assembly. The installation process employs a combination of pin 21 engaging with slot 12 and latching components engaging with latching components 3. This combination simplifies installation, reduces difficulty, and enhances overall stability. It is conceivable that corresponding latching components 3 could also be installed on the first and second sides of the oil mesh 2, with corresponding latching components installed at the corresponding positions on the mounting base, achieving the same technical effect.

[0076] The range hood in this embodiment (such as on / off, airflow adjustment, etc.) can be controlled by a voice module. It is equipped with a controller, a voice receiving module, and a voice parsing module. The voice receiving module receives user commands, and the voice parsing module parses the commands. Based on the parsed commands, the controller controls the range hood to perform corresponding operations, thereby realizing intelligent control of the range hood and improving the user experience.

[0077] The first elastic element 152, the second elastic element 144 and the third elastic element 34 of the present invention refer to parts that store energy and provide force through elastic deformation. They can be helical springs (including compression springs and tension springs), torsion springs, leaf springs, disc springs or elastic columns made of elastic materials such as rubber and silicone. The specific type and specifications can be selected according to the actual installation space and the required elastic force.

[0078] In the description of this application, it should be understood that the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. The terms "installed," "connected," "joined," and "fixed," etc., should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

Claims

1. An oil filter mounting structure for a fume extraction device, the fume extraction device having a mounting base for mounting an oil filter (2), characterized in that: include: The latching assembly is mounted on the mounting base of the fume extraction device and includes a mounting base (13) with mounting holes (131) and a latching member (14) movably mounted on the mounting base (13). The latching member (14) can move between a locked position and an unlocked position, and the latching member (14) always has a tendency to move from the unlocked position to the locked position. A snap fastener assembly (3), disposed on the oil mesh (2), includes a snap fastener seat (31) for connecting to the oil mesh (2) and a snap fastener (32) rotatably disposed on the snap fastener seat (31). The snap fastener (32) has an insertion portion (321) extending outward relative to the snap fastener seat (31) and capable of being inserted into the mounting hole (131) of the mounting base (13). The insertion portion (321) of the snap fastener (32) has a snap-fit ​​engagement portion (3210). The extension direction of the rotation axis (320) of the snap fastener (32) relative to the snap fastener seat (31) is the same as the insertion direction of the insertion portion (321) of the snap fastener (32). The fastener (32) has a first position and a second position as its position relative to the fastener seat (31) changes. When the fastener (32) is in the first position, the latching member (14) and the latching engagement portion (3210) of the fastener (32) form a limiting engagement, restricting the fastener (32) from disengaging from the mounting channel (131). When the fastener (32) is in the second position, the latching engagement portion (3210) of the fastener (32) disengages from the latching member (14), releasing the limiting on the fastener (32) and allowing the fastener (32) to disengage from the mounting channel (131).

2. The oil mesh installation structure for the fume extraction device according to claim 1, characterized in that: It also includes an ejector member disposed in the mounting base (13). When the insert fastener (32) is in the mounting hole (131) of the mounting base (13) and the latching member (14) is in the first position, the latching member (14) engages with the latching engagement portion (3210) of the insert fastener (32) and restricts the insert fastener (32) from disengaging from the mounting hole (131). At the same time, the ejector member abuts against the insert fastener (32) and makes the insert fastener (32) tend to disengage from the mounting hole (131).

3. The oil mesh installation structure for the fume extraction device according to claim 2, characterized in that: The mounting base (13) has a movable channel (133) corresponding to the inner end position of the mounting channel (131) and communicating with the mounting channel (131). The ejector component includes an ejector (151) movably disposed in the movable channel (133) and a first elastic member (152). The first elastic member (152) acts on the ejector (151) and makes the ejector (151) always have the tendency to eject the buckle (32).

4. The oil mesh installation structure for the fume extraction device according to claim 3, characterized in that: The movable channel (133) and the mounting channel (131) extend in the same straight direction. The ejector (151) is movably constrained in the movable channel (133). The first elastic element (152) is a first spring, which is disposed in the movable channel (133) and abuts against the side of the ejector (151) away from the mounting channel (131).

5. The oil mesh installation structure for the fume extraction device according to claim 4, characterized in that: The insertion part (321) of the fastener (32) is generally a flat conical structure (3211). The ejector (151) is generally columnar and has a positioning groove (1511) that is axially recessed at one end facing the insertion part (321) and adapted to the conical structure (3211) of the insertion part (321). When the fastener (32) is installed in the mounting hole (131) of the mounting base (13) and the buckle (14) is in the first position, the conical part of the insertion part (321) is engaged in the positioning groove (1511).

6. The oil mesh installation structure for the fume extraction device according to claim 5, characterized in that: A keyway fit structure for restricting the circumferential rotation of the ejector (151) is also provided between the ejector (151) and the inner wall of the movable channel (133).

7. The oil mesh installation structure for the fume extraction device according to claim 6, characterized in that: The positioning groove (1511) at the end of the ejector (151) is a V-shaped groove. During the process of the fastener (32) rotating from its first position to its second position, the conical part of the fastener (32) can disengage from the V-shaped groove and abut against the top of the ejector (151).

8. The oil mesh installation structure for the fume extraction device according to claim 5, characterized in that: The section of the main body of the insertion part (321) that connects with the cone structure (3211) is a cylindrical section (3212). A stop step (3213) is constructed at the connection position between the cylindrical section (3212) and the cone structure (3211). The position of the cylindrical section (3212) of the insertion part (321) corresponding to the area where the stop step (3213) is located is the snap-fit ​​joint part (3210).

9. The oil mesh installation structure for the fume extraction device according to any one of claims 3 to 8, characterized in that: The mounting base (13) defines a latching chamber (132) in the side region of the movable channel (133) and communicates with the movable channel (133). The latching member (14) is movably limited in the latching chamber (132) and can move toward the location of the movable channel (133) to be in the locked position and move toward the side away from the movable channel (133) to be in the unlocked position.

10. The oil mesh installation structure for the fume extraction device according to claim 9, characterized in that: The latching chamber (132) is also provided with a second elastic element (144), which acts on the latching member (14) and causes the latching member (14) to have a tendency to move from the unlocking position to the locking position.

11. The oil mesh installation structure for the fume extraction device according to claim 10, characterized in that: The latching member (14) has two symmetrically arranged relative to the mounting holes (131) of the mounting base (13), and the latching engagement part (3210) on the inserting member (32) also has two corresponding latching engagement parts (3210). Under the action of the corresponding second elastic member (144), the two latching members (14) can move closer to each other and be correspondingly engaged into the two latching engagement parts (3210) of the inserting part (321), and under the pressure of the operating member, they can move away from each other and disengage from the two latching engagement parts (3210) of the inserting part (321).

12. The oil mesh installation structure for the fume extraction device according to claim 10, characterized in that: The mounting base (13) has an insertion port (1300) on the side facing the fastener (32) for the fastener (32) to be inserted into the movable channel (133). The side wall of the fastener (14) facing the insertion port (1300) is called the first side wall (141), and the side wall of the two fasteners (14) facing each other is called the second side wall (143). The fastener (14) has a guide slope (142) that smoothly transitions from the first side wall (141) to the second side wall (143).

13. The oil mesh installation structure for the fume extraction device according to any one of claims 1 to 8, characterized in that: It also includes an operation knob (33), the buckle seat (31) and the buckle (32) are arranged on the inner side of the oil mesh (2), the operation knob (33) is arranged on the outer side of the oil mesh (2) and is connected to the buckle (32).

14. The oil mesh installation structure for the fume extraction device according to claim 13, characterized in that: It also includes a third elastic element (34), which acts on the buckle (32) and causes the buckle (32) to always have a tendency to rotate from the second position to the first position.

15. A fume extraction device, comprising a fume hood (1) having an air inlet (10) and an oil filter (2), wherein the oil filter (2) is installed at the air inlet (10) of the fume hood (1), characterized in that: It also includes an oil mesh mounting structure for the fume extraction device according to any one of claims 1 to 14, wherein the edge of the air inlet (10) of the fume hood (1) has a mounting extension plate (11) extending toward the center of the air inlet (10), the mounting seat (13) of the buckle assembly is mounted on the side of the mounting extension plate (11) facing the inside of the fume hood (1), and the mounting extension plate (11) is also provided with a first opening (110) for the buckle (32) to pass through and enter the mounting hole (131) of the mounting seat (13).

16. The fume extraction device according to claim 15, characterized in that: The oil mesh (2) has a first side and a second side opposite to each other. The first side has an outwardly extending pin (21). The oil mesh (2) is provided with the buckle assembly (3) near its second side. The edge of the air inlet (10) of the smoke hood (1) is provided with a slot (12) for the pin (21) to be inserted into and the buckle assembly.

Images