A rotation engagement anti-disengagement assembly structure of an air purifier upper shell and an air inlet grille

Abstract

The utility model discloses a kind of rotation snap-fit anti-disassembly assembly structure of air purifier upper shell and air inlet grille, belong to air purifier, household appliance field, including upper shell, air inlet grille and latch. Upper shell is equipped with 8 groups of double-side longitudinal bone position and 4 strip convex point horizontal bone position;Air inlet grille is equipped with annular convex edge, recess with concave point, screw column and locking groove;Latch is fixed to screw column, and is inserted into locking groove and is stuck horizontal bone position. When assembling, positioning alignment, rotation snap-fit, latch locking complete assembly, realize the function of "double-side clamping anti-deformation, rotation guide fast assembly, snap-fit prompt accurate position, latch locking anti-rotation". This structure assembly is efficient, connection is stable, anti-deformation and anti-looseness, adaptive batch production, solve the problem of low efficiency and easy looseness of existing structure, applicable to the component assembly of air purifier and other household appliances.

Description

Technical Field

[0001] This utility model relates to air purifiers, and more particularly to a rotating locking anti-detachment assembly structure for the upper shell and air inlet grille of an air purifier. Background Technology

[0002] The common assembly methods for the upper shell and air intake grille of existing air purifiers are as follows: Screw-locking type: The air intake grille is directly fixed to the upper shell using multiple screws. Although this method provides a secure connection, the assembly process is cumbersome, production efficiency is low, additional screws and tools are required, and it affects the aesthetic appearance of the product.

[0003] Simple snap-fit ​​type: This method uses snap-fits and slots for connection. While it eliminates screws and simplifies assembly, it has significant drawbacks: First, snap-fit ​​connections are prone to loosening under external force or after prolonged use, leading to unstable connections and even rattling noises. Second, the simple snap-fit ​​structure makes it difficult to precisely control the circumferential position of the assembly, easily causing misalignment between the grille's decorative strips or air inlets and other parts of the casing, affecting aesthetics. Finally, the snap-fits themselves are prone to breakage under repeated disassembly and assembly or excessive force, resulting in insufficient reliability.

[0004] Therefore, existing technologies suffer from problems such as low assembly efficiency, unstable connections, easy loosening and rotation, and difficulty in accurately aligning assembly positions. There is an urgent need for an assembly structure that can achieve rapid and precise positioning, secure connections, and effectively prevent loosening. Summary of the Invention

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a rotating, locking, and anti-detachment assembly structure for the upper shell and air inlet grille of an air purifier. This structure aims to solve problems such as low assembly efficiency, unstable connection, easy loosening and rotation, and difficulty in accurately aligning the assembly position in the prior art. To achieve the above objectives, the technical solution adopted by this utility model is: to provide an air purifier and its assembly structure for the upper shell and air inlet grille. By interlocking the internal ribs of the upper shell with the protruding edge of the air inlet grille, combined with rotational positioning and pin locking, a fast, precise, and secure assembly effect is achieved, effectively preventing loosening and rotation during use.

[0006] The above-mentioned objective of this utility model is achieved by the following technical solution: a rotating engagement and anti-detachment assembly structure for an air purifier upper shell and an air inlet grille, comprising an upper shell, an air inlet grille and a pin, which are assembled by a rotating engagement and locking structure. The upper shell is a circular shell, adapted to the top contour of the air purifier body. Inside, there are 8 sets of longitudinal ribs evenly distributed along the circumference (each set contains 2 parallel ribs, totaling 16 longitudinal ribs, all integrally injection molded with the upper shell). Each set of longitudinal ribs has a common L-shaped engaging feature at its top (the horizontal section of the L-shaped feature faces inwards, and the vertical section is perpendicularly connected to the top of the two longitudinal ribs in that set, forming a symmetrical support structure). Simultaneously, near the edge of the upper shell, there are 4 transverse ribs evenly distributed along the circumference, spaced apart from the 8 sets of longitudinal ribs (two sets of longitudinal ribs correspond to two adjacent transverse ribs). At the end of each transverse rib (the terminating end along the rotation direction), there is a hemispherical protrusion (the protrusion is integrally injection molded with the transverse rib, with a height of 0.3-0.4mm, and made of the same material as the transverse rib).

[0007] The air inlet grille is a circular, thin-walled part whose outer diameter matches the inner diameter of the upper shell, ensuring no significant gaps after assembly that could cause air leakage in the duct. The edge of the air inlet grille has a ring-shaped raised edge (the raised edge is integrally formed with the air inlet grille, and its height matches the height of the L-shaped horizontal segment of the longitudinal ribs). This raised edge engages with the eight sets of longitudinal ribs on the upper shell (two ribs in each set of longitudinal ribs respectively abut the inner and outer sides of the raised edge, forming a clamping support). The side of the air inlet grille (the side facing the inner side of the shell) corresponds to the position of the four transverse ribs on the upper shell. The air intake grille has four grooves, the shape and size of which perfectly match the cross-sectional shape of the transverse rib, forming a rotation guide structure. At the end of each groove (the rotation termination position corresponding to the convex point of the transverse rib), there is a hemispherical concave point that matches the convex point (the depth and inner diameter of the concave point match the height and outer diameter of the convex point one by one, ensuring that the convex point can be accurately embedded in the concave point). In addition, there is a cylindrical screw post on the back of the air intake grille (the screw post is integrally injection molded with the air intake grille), and a locking groove for the pin is provided on one side of the screw post for the pin to be inserted.

[0008] The locking component is a pin (made of ABS material with a certain deformation capability). The pin has a sleeve hole for fitting into the screw post. After the pin is fitted into the screw post, it is fixed to the screw post by a screw. After the pin passes through the locking groove, it locks the horizontal rib, so that the horizontal rib, which is integrally formed with the upper shell, cannot slide out of the groove, thereby locking the upper shell and the air intake grille.

[0009] Assembly process of this utility model: Step 1: Positioning and Alignment - With the back of the air intake grille facing the inside of the housing, align the four grooves on the air intake grille with the four transverse ribs inside the upper housing, and at the same time ensure that the annular convex edge of the air intake grille is embedded between two of the eight sets of longitudinal ribs (the inner side of the convex edge fits against the inner wall of the rib, and the outer side fits against the outer wall of the rib). Step 2: Rotation and Engagement – ​​Keep the air intake grille aligned with the upper shell, rotate the air intake grille clockwise, and slide the transverse ribs along the grooves. During the sliding process, the protrusions of the transverse ribs exert slight pressure and friction against the inner wall of the grooves. When rotated to the preset position, the protrusions at the end of the transverse ribs overcome the slight resistance of the inner wall of the grooves and precisely embed into the concave point at the end of the arc-shaped groove. At this time, a "click" sound can be heard, indicating that the rotation is in place. At the same time, the L-shaped horizontal segment at the top of each set of longitudinal ribs is fully engaged with the upper surface of the annular convex edge of the air intake grille. The 8 sets of longitudinal ribs form circumferential uniform support and axial limit for the annular convex edge through the "double-sided clamping + L-shaped engagement" method, which not only prevents the air intake grille from axially falling off, but also avoids grille deformation. Step 3: Locking and fixing - Insert the pin into the locking groove of the air intake grille. The pin will lock the horizontal ribs on the inner wall of the upper shell, preventing the horizontal ribs from sliding out of the groove and thus preventing the air intake grille from rotating accidentally during use.

[0010] The functional principle of this utility model is as follows: 1. Anti-deformation principle: 8 sets of longitudinal ribs (2 in each set) are evenly distributed along the circumference. Each set of ribs forms a "double-sided clamping support" for the annular convex edge of the air intake grille. The 16 ribs form 16 support points, which greatly disperses the stress on the grille during assembly and use, and avoids warping and denting of the thin-walled structure due to uneven stress. 2. Rapid assembly and positioning indication principle: The cooperation of 4 horizontal ribs and arc-shaped grooves forms a guide structure. During rotation, the convex edge fits against both sides of each set of ribs to assist in positioning. At the same time, the convex points of the horizontal ribs and the concave points of the grooves form a "snap-on positioning indication structure". When rotated to the end, the convex point embeds into the concave point, and a "click" sound is produced through mechanical engagement, which intuitively indicates that the assembly is in place. No additional inspection tools are required, and engagement can be achieved without precise alignment, thus improving assembly efficiency. 3. Anti-rotation principle: The pin restricts the lateral rib from sliding out of the groove, further restricting the circumferential freedom of the air intake grille. Combined with the locking and fixing of the convex and concave points and the clamping friction of the longitudinal rib and the convex edge, the anti-rotation effect is triple guaranteed, avoiding assembly misalignment caused by vibration or accidental contact.

[0011] Compared with the prior art, the beneficial effects of this utility model are: The air purifier upper shell and air inlet grille assembly structure of this utility model, through the coordinated design of "8 sets of double-sided clamping longitudinal ribs + transverse ribs with protrusions + arc-shaped grooves with concave points + pin locking", has the following significant advantages over the prior art: 1. Significantly improves deformation resistance and structural stability: Eight sets of longitudinal ribs (two ribs per set) form a double-sided clamping support for the annular convex edge of the air intake grille. Sixteen support points are evenly distributed along the circumference, which can effectively disperse the stress on the thin-walled grille during assembly, transportation and use, avoiding deformation problems such as edge warping and central depression caused by traditional single snap-fit ​​structures. Tests have shown that the deformation of the grille can be controlled within 0.2mm, and the structural stability is improved by more than 60%. At the same time, the L-shaped snap-fit ​​feature and the axial limiting of the convex edge further prevent the air intake grille from falling off axially, and there is no loosening or shaking after assembly.

[0012] 2. Easy and efficient assembly, intuitive identification upon placement: The guide cooperation between the horizontal ribs and the arc-shaped grooves, combined with the double-sided positioning of the convex edge by the vertical ribs, allows the air intake grille to be quickly embedded and rotated without precise alignment. Furthermore, the mechanical snap-fit ​​structure formed by the convex points of the horizontal ribs and the concave points of the grooves produces a "click" sound when the convex points are inserted into the concave points when the rotation is in place, providing intuitive feedback that the assembly is in place. Operators can judge the assembly status without professional training. Compared with the existing unmarked structures, the assembly efficiency is greatly improved and rework costs are reduced.

[0013] 3. Reliable anti-rotation locking for enhanced safety: Through a triple anti-rotation design of "protruding point-concave point engagement + lateral rib-groove fitting + pin locking", the circumferential rotation of the air intake grille is restricted from three dimensions: mechanical engagement, structural limitation, and independent locking. This effectively avoids assembly misalignment caused by user accidental touch, equipment vibration, or transportation bumps. In testing, the air intake grille showed no rotational deviation. The locking reliability is 80% higher than that of the existing single friction anti-rotation structure, ensuring the stability of the airflow channel of the air purifier and that the purification efficiency is not affected by assembly loosening.

[0014] 4. Compact and reasonable structure, suitable for mass production: All ribs, protrusions, concave points, and screw posts are manufactured using a one-piece injection molding process, eliminating the need for additional assembly parts, simplifying the production process, and reducing parts costs. At the same time, the structural features are evenly distributed along the circumference, resulting in balanced stress distribution, low mold development difficulty, and compatibility with existing injection molding production lines. During mass production, the defect rate can be controlled below 0.3%. Compared with traditional multi-part assembly structures, production efficiency is increased by 30%, and overall production costs are reduced by 15%-20%.

[0015] 5. Easy disassembly and maintenance, optimized user experience: The pin-locking structure can be quickly disassembled by removing only one screw, compared to a four-screw fastening structure, reducing disassembly time to less than 10 seconds and making after-sales maintenance more efficient. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the exploded structure of this utility model; Figure 2 This is a structural diagram of the present invention in its assembled state; Figure 3 This is a schematic diagram of the internal structure of the upper shell of this utility model; Figure 4 This is a schematic diagram of the rear structure of the air inlet grille of this utility model; Figure 5 This is a schematic diagram of the internal structure of the present invention after assembly.

[0017] Figure 6 This is a schematic diagram of one side of the structure of this utility model.

[0018] Figure 7 yes Figure 6 Sectional view at point AA.

[0019] Explanation of reference numerals in the attached drawings: 1-Upper shell, 1.1-Longitudinal rib, 1.2-L-shaped engagement feature, 1.3-Transverse rib, 1.4-Protrusion, 2-Air inlet grille, 2.1-Annular protrusion, 2.2-Groove, 2.3-Concave point, 2.4-Screw post, 2.5-Locking groove, 3-Pin, 3.1-Sleeve hole. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] like Figure 1-7 As shown in this embodiment, a rotating locking anti-detachment assembly structure for the upper shell and air inlet grille of an air purifier includes an upper shell 1, an air inlet grille 2, and a pin 3. The specific configuration and assembly process are as follows: Component configuration in this embodiment: Upper shell 1: It is a circular shell that fits the top contour of the air purifier body and is made of ABS material through one-piece injection molding; there are 8 sets of longitudinal ribs 1.1 evenly distributed along the circumference inside, each set containing 2 parallel ribs (16 in total), and each set of ribs has an L-shaped locking feature 1.2 at the top; there are also 4 transverse ribs 1.3, which are distributed at intervals with the longitudinal ribs, and each transverse rib has a hemispherical protrusion 1.4 with a height of 0.35mm at the end; Air intake grille 2: It is a circular thin-walled part, made of PP material and injection molded in one piece. The outer diameter is adapted to the inner diameter of the upper shell. The edge is provided with an annular convex edge 2.1, and the side is provided with 4 grooves 2.2 adapted to the transverse ribs. The end of the groove is provided with a hemispherical concave point 2.3 with a depth of 0.35mm. The back is provided with a screw post 2.4, and a locking groove 2.5 is provided on one side of the screw post. Pin 3: Made of ABS material, pin 3 has a sleeve hole 3.1 for fitting into screw post 2.4. After pin 3 is fitted into screw post 2.4, it is fixed by locking screws on the threaded post.

[0022] The assembly process in this embodiment is as follows: 1. Positioning and Alignment: With the back of the air intake grille 2 facing the inside of the housing, align the four grooves 2.2 with the four transverse ribs 1.3 of the upper housing 1, and insert the annular protrusion 2.1 between the two ribs of the eight sets of longitudinal ribs 1.1. 2. Rotary engagement: Rotate the air intake grille 2 clockwise, the transverse rib 1.3 slides along the groove 2.2, the protrusion 1.4 is embedded into the concave point 2.3 and makes a "click" sound, the L-shaped engagement feature 1.2 engages with the upper surface of the annular protrusion 2.1; 3. Locking and fixing: Insert the pin 3 into the locking groove 2.5 and lock the transverse rib 1.3 so that it cannot slide out of the groove 2.2, thus completing the assembly.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotating locking and anti-detachment assembly structure for the upper shell and air inlet grille of an air purifier, characterized in that: Includes upper shell (1), air intake grille (2) and latch (3); The upper shell (1) is a circular shell with 8 sets of longitudinal ribs (1.1) evenly distributed along the circumference inside. Each set contains 2 parallel ribs, and each set of ribs has an L-shaped locking feature (1.2) at the top. The upper shell also has 4 transverse ribs (1.3) evenly distributed inside. Each transverse rib has a hemispherical protrusion at the end (1.4). The air intake grille (2) is a circular thin-walled component with an annular protrusion (2.1) on the edge and four grooves (2.2) on the side that are adapted to the transverse ribs. The end of the groove is provided with a hemispherical concave point (2.3) that is adapted to the protrusion. The back of the air intake grille is provided with a screw post (2.4) and a locking groove (2.5) on one side of the screw post. The pin (3) is provided with a sleeve hole (3.1) for fitting into the screw post (2.4), and is fixed by screws after fitting into the screw post (2.4).

2. The rotating engagement and anti-detachment assembly structure for the upper shell and air inlet grille of an air purifier according to claim 1, characterized in that: There are 16 longitudinal ribs (1.1), which are integrally injection molded with the upper shell (1). The two ribs of each set of longitudinal ribs are respectively attached to the inner and outer sides of the annular convex edge (2.1).

3. The rotating engagement and anti-detachment assembly structure for the upper shell and air inlet grille of an air purifier according to claim 1, characterized in that: The horizontal section of the L-shaped engaging feature (1.2) faces the inside of the shell, and the vertical section is vertically connected to the top of the two longitudinal bone positions of the group. Its horizontal section engages with the upper surface of the annular protrusion (2.1).

4. The rotating engagement and anti-detachment assembly structure for the upper shell and air inlet grille of an air purifier according to claim 1, characterized in that: The height of the protrusion (1.4) is 0.3-0.4mm, and it is integrally injection molded with the transverse bone position (1.3); the depth and inner diameter of the concave point (2.3) are matched one-to-one with the height and outer diameter of the protrusion (1.4).

5. The rotating engagement and anti-detachment assembly structure for the upper shell and air inlet grille of an air purifier according to claim 1, characterized in that: The upper shell (1) has 4 transverse ribs (1.3) and 8 longitudinal ribs (1.1) spaced apart, with 2 longitudinal ribs corresponding to each two adjacent transverse ribs.

6. The rotating engagement and anti-detachment assembly structure for the upper shell and air inlet grille of an air purifier according to claim 1, characterized in that: The pin (3) is made of ABS material and has the ability to deform.

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