Door body frame structure capable of preventing distortion

Abstract

The utility model discloses a kind of door body frame structures of anti-twist deformation, including PVC frame, frame reinforcing iron and aluminium alloy frame, the inside of the PVC frame is equipped with cavity, the left end of the cavity is trapezoidal groove structure, the width of the trapezoidal groove structure is left to show decreasing trend, the left end of the frame reinforcing iron is trapezoidal structure, the trapezoidal structure is matched with trapezoidal groove structure, the left end of the trapezoidal structure and trapezoidal groove structure is fixed by screw.The utility model is redesigned to the structure of the cavity and reinforcing iron of PVC frame, can increase the gap between reinforcing iron when penetrating into frame and cavity inner wall, while reinforcing iron is fastened in PVC frame, it can be closely attached with cavity inner wall, improve the shaping effect of reinforcing iron to PVC frame.

Description

Technical Field

[0001] This utility model relates to a door frame structure that prevents twisting and deformation. Background Technology

[0002] The frame of a freezer door is composed of PVC and aluminum alloy frames. However, PVC frames have low strength and are prone to deformation over time. To improve the strength of PVC frames, U-shaped reinforcing irons are typically installed inside the cavities of the PVC frame. Figure 1 As shown, a U-shaped reinforcing iron 2 is provided inside the PVC frame 1. The U-shaped reinforcing iron is fixed to the PVC frame 1 by screws 3. In order for the U-shaped reinforcing iron to be able to pass smoothly into the PVC frame, a large gap is usually reserved between the internal cavity of the PVC frame and the U-shaped reinforcing iron, which weakens the shaping effect of the U-shaped reinforcing iron on the PVC frame. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a door frame structure that prevents twisting and deformation, effectively solving the issues mentioned in the background art.

[0004] The technical solution adopted in this utility model is:

[0005] A door frame structure resistant to torsion and deformation includes a PVC frame, a frame reinforcing iron, and an aluminum alloy frame. The PVC frame has an internal cavity, and the left end of the cavity has a trapezoidal groove structure. The width of the trapezoidal groove structure decreases to the left. The left end of the frame reinforcing iron has a trapezoidal structure. The trapezoidal structure matches the trapezoidal groove structure, and the left ends of the trapezoidal structure and the trapezoidal groove structure are fixed by screws.

[0006] Preferably, the left end of the trapezoidal groove structure has a boss that protrudes to the right, and the PVC frame has a recessed groove on the outside of the left side of the boss. The screw passes through the boss from left to right and is fixed to the frame reinforcing iron.

[0007] Preferably, the trapezoidal groove structure is an isosceles trapezoid with a smaller left side and a larger right side.

[0008] Preferably, when the frame reinforcing iron is fixed in the cavity by screws, a gap is left between the left end face of the frame reinforcing iron and the right end face of the boss.

[0009] The innovative points of this utility model are as follows:

[0010] 1. Matching design of trapezoidal groove and trapezoidal reinforcing iron:

[0011] The cavity inside the PVC frame is designed with a trapezoidal groove structure on the left end, with its width gradually decreasing to the left. The left side of the frame reinforcing iron adopts a trapezoidal structure that matches it perfectly. This design allows the reinforcing iron to gradually fit tightly through the guiding effect of the trapezoidal surface when it is tightened, reducing the installation gap and thus enhancing the stability of the overall structure.

[0012] 2. Fixing structure of the boss and the settling tank:

[0013] A boss is set at the middle of the left end of the trapezoidal groove, and a countersunk groove is opened at the corresponding position on the outside of the PVC frame. The screw passes through the countersunk groove, passes through the boss, and is fixed to the reinforcing iron. This design not only simplifies the installation process, but also disperses the force on the screw through the support of the boss, avoiding deformation caused by local stress concentration. At the same time, the rear end of the screw is hidden in the countersunk groove.

[0014] 3. Optimized design of isosceles trapezoids:

[0015] The trapezoidal groove adopts an isosceles trapezoidal structure with a smaller left side and a larger right side to ensure that the reinforcing iron is subjected to uniform force during insertion, further reducing gap problems caused by installation deviations;

[0016] 4. The buffering effect of the reserved gap:

[0017] A certain gap is maintained between the left end face of the reinforcing iron and the right end face of the boss, allowing the material to undergo slight deformation when the temperature changes or when it is under stress, avoiding stress accumulation caused by rigid connection, thereby extending service life. At the same time, the reserved gap can ensure that the trapezoidal surface between the reinforcing iron and the trapezoidal groove fits tightly.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. Significantly improves resistance to deformation:

[0020] Through the tight matching of the trapezoidal structure and the fixing with screws, the gap between the reinforced iron and the PVC frame is greatly reduced, effectively suppressing the twisting and deformation of the frame, especially under long-term use or load conditions.

[0021] 2. Enhanced ease of installation and stability:

[0022] The trapezoidal guide fastening method allows for a larger gap when the reinforcing iron is inserted into the frame, making it easier to insert. The trapezoidal guide design ensures that the reinforcing iron is stably fixed to the PVC frame during fastening. The boss and groove structure simplifies the fastening process while ensuring a firm connection, reducing assembly difficulty and labor costs.

[0023] 3. Scientific distribution of material stress:

[0024] The reserved gaps and isosceles trapezoidal design disperse external loads and stresses caused by thermal expansion and contraction, avoiding local fatigue damage and improving the durability of the door frame.

[0025] This invention redesigns the cavity and reinforcing iron structure of the PVC frame, increasing the gap between the reinforcing iron and the inner wall of the cavity when it is inserted into the frame. At the same time, the reinforcing iron can fit tightly against the inner wall of the cavity when it is fastened inside the PVC frame, thus improving the shaping effect of the reinforcing iron on the PVC frame. Attached Figure Description

[0026] Figure 1 This is a structural schematic diagram of a door frame in the prior art;

[0027] Figure 2 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0028] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0030] Furthermore, in the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Furthermore, the terms "first" and "second" 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0035] like Figure 2 As shown, a door frame structure for preventing torsion and deformation includes a PVC frame 1, a frame reinforcing iron 4, and an aluminum alloy frame 5. The PVC frame 1 has a cavity 6 inside. The left end of the cavity 6 is a trapezoidal groove structure 7. The width of the trapezoidal groove structure 7 decreases to the left. The left end of the frame reinforcing iron 4 is a trapezoidal structure 8. The trapezoidal structure 8 matches the trapezoidal groove structure 7. The left ends of the trapezoidal structure 8 and the trapezoidal groove structure 7 are fixed by screws 3.

[0036] The trapezoidal groove structure 7 has a boss 9 protruding to the right at the middle of its left end. The PVC frame 1 has a recessed groove 10 on the outside of the boss on the left side. The screw 3 passes through the boss 9 from left to right and is fixed to the frame reinforcing iron 4.

[0037] The trapezoidal groove structure 7 is an isosceles trapezoid with a smaller left side and a larger right side.

[0038] When the frame reinforcing iron 4 is fixed in the cavity 6 by screws 3, a gap 11 is left between the left end face of the frame reinforcing iron 4 and the right end face of the boss 9.

[0039] The terms "left" and "right" mentioned above are based on the orientation or positional relationship shown in the accompanying drawings. They are used only to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] This invention significantly improves resistance to deformation and ease of installation by optimizing the matching design and fixing method of the PVC frame and reinforcing iron. Its core working principle is as follows:

[0041] 1. Matching design of trapezoidal groove and trapezoidal reinforcing iron:

[0042] Structural features:

[0043] The cavity inside the PVC frame is designed with a trapezoidal groove structure on the left end, with the width gradually decreasing to the left (an isosceles trapezoid with the left side smaller and the right side larger).

[0044] The left side of the frame reinforcement uses a perfectly matching trapezoidal structure to ensure a perfect shape fit;

[0045] Working principle:

[0046] Guiding function: During installation, the trapezoidal structure provides a natural guide for the reinforcing iron, making it easier to snap into the trapezoidal groove structure of the PVC frame to the left;

[0047] Tight fit: When fastened with screws, the oblique force on the trapezoidal surface causes the reinforcing iron to gradually fit tightly against the inner wall of the trapezoidal groove, reducing gaps and thus enhancing the stability of the overall structure;

[0048] Uniform stress distribution: The isosceles trapezoidal design ensures that the reinforcing iron is subjected to uniform stress during insertion and fastening, avoiding local stress concentration;

[0049] 2. Fixing structure of the boss and the settling tank:

[0050] Structural features:

[0051] The trapezoidal groove has a raised boss at the middle of the left end, and a recessed groove is opened at the corresponding position on the outside of the PVC frame.

[0052] The screw passes through the countersunk groove and the boss, and is secured to the reinforcing iron;

[0053] Working principle:

[0054] Simplified installation: The countersunk groove provides positioning and concealment space for the screws, making installation easier;

[0055] Stress dispersion: The boss acts as a support point to disperse the tightening force of the screws and prevent the PVC frame from being subjected to excessive local stress, which could lead to deformation.

[0056] Concealed design: The rear end of the screw is hidden in the recess, resulting in a cleaner appearance and reducing external interference;

[0057] 3. The buffering effect of the reserved gap:

[0058] Structural features:

[0059] A certain gap is maintained between the left end face of the reinforcing iron and the right end face of the boss.

[0060] Working principle:

[0061] Adaptive to deformation: The gap allows the material to undergo slight deformation when the temperature changes or when it is under stress, avoiding stress accumulation caused by rigid connection;

[0062] Dynamic fit: Under external load, the reinforcing iron can maintain close contact with the trapezoidal groove through minute displacement, ensuring long-term stability;

[0063] 4. Improved resistance to deformation and durability:

[0064] Dynamic cosmetic surgery results:

[0065] The trapezoidal matching design ensures that the reinforcing iron always applies uniform lateral pressure to the inner wall of the PVC frame after fastening, creating a "dynamic shaping" effect and suppressing torsional deformation.

[0066] Scientific stress distribution:

[0067] The isosceles trapezoidal shape and reserved gap design disperse external loads (such as the weight of the door itself) and stresses caused by thermal expansion and contraction, avoiding local fatigue damage and extending service life.

[0068] Finally, it should be noted that the above examples are merely specific embodiments of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of this utility model should be considered within the protection scope of this utility model.

Claims

1. A door frame structure resistant to torsion and deformation, characterized in that, It includes a PVC frame (1), a frame reinforcing iron (4) and an aluminum alloy frame (5). The PVC frame (1) has a cavity (6) inside. The left end of the cavity (6) is a trapezoidal groove structure (7). The width of the trapezoidal groove structure (7) decreases to the left. The left end of the frame reinforcing iron (4) is a trapezoidal structure (8). The trapezoidal structure (8) matches the trapezoidal groove structure (7). The left ends of the trapezoidal structure (8) and the trapezoidal groove structure (7) are fixed by screws (3).

2. The door body frame structure according to claim 1, wherein The trapezoidal groove structure (7) has a boss (9) protruding to the right at the middle of the left end. The PVC frame (1) has a recessed groove (10) on the outside of the left side of the boss. The screw (3) passes through the boss (9) from left to right and is fixed to the frame reinforcing iron (4).

3. The door body frame structure of claim 1, wherein The trapezoidal groove structure (7) is an isosceles trapezoid with the left side smaller than the right side.

4. The door body frame structure of claim 2, wherein When the frame reinforcement iron (4) is fixed in the cavity (6) by screws (3), there is a gap (11) between the left end face of the frame reinforcement iron (4) and the right end face of the boss (9).

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