Telescopic ceiling handle, machining method and automobile

Abstract

The invention discloses a telescopic ceiling handle, a machining method and an automobile, and relates to the technical field of automobile interiors, the telescopic ceiling handle comprises a buffer structure assembly, and the buffer structure assembly is arranged between a handle base cover and a handle base; the buffering structure assembly comprises a buffering structure framework and buffering structure soft rubber which are connected into a whole, the buffering structure framework is matched with the inner contour of the handle base cover, and the buffering structure soft rubber is matched with the outer contour of the handle base cover; the buffer structure soft rubber can absorb vibration generated by collision between the middle handle base cover and the handle base when being stressed and deformed, and the buffer structure framework is used for supporting the buffer structure soft rubber. By means of the buffering structure assembly arranged between the handle base cover and the handle base, harsh sound generated by collision can be absorbed when the ceiling handle returns, the silence experience perception of a passenger compartment is improved, and meanwhile the situation that the appearance quality feeling is affected due to collision, damage and the like between plastic parts can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile interior decoration, and in particular to a retractable roof handle, a processing method and an automobile. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Retractable ceiling handles typically utilize a spring and damper to achieve the required return time. However, during the return process, the strong torque of the spring forces the base cover, under which the handle is mounted, collides with the plastic handle base, producing a harsh sound. Adjusting the spring torque or creating a gap between the base and the handle cannot prevent contact between the cover and the base, resulting in poor fit, uneven clearance, and other cosmetic issues.

[0004] In the prior art, a single-layer rubber pad is used to isolate the base cover and the base of the ceiling handle. However, the rubber pad is relatively soft and is fixed by adhesive bonding or rubber nail clamping. This method is not reliable, especially when used in sports parts. The rubber pad is prone to falling off, curling and deformation, affecting the performance of the ceiling handle. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the purpose of the present invention is to provide a retractable roof handle, a processing method and a car. By utilizing a buffer structure assembly arranged between the handle base cover and the handle base, the present invention can absorb the harsh sound generated by the impact when the roof handle returns to its position, improve the quiet experience of the passenger compartment, and at the same time avoid the impact of bumps and damage between plastic parts on the appearance quality.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] In a first aspect, an embodiment of the present invention provides a retractable ceiling handle, comprising a buffer structure assembly, wherein the buffer structure assembly is disposed between a handle base cover and a handle base;

[0008] The buffer structure assembly includes a buffer structure skeleton and a buffer structure soft rubber connected as one body, the buffer structure skeleton is adapted to the inner contour of the handle base cover, and the buffer structure soft rubber is adapted to the outer contour of the handle base cover; the buffer structure soft rubber can absorb the vibration generated by the collision between the middle handle base cover and the handle base when deformed by force, and the buffer structure skeleton is used to support the buffer structure soft rubber.

[0009] As a further implementation method, the buffer structure skeleton and the buffer structure soft rubber are fused together through secondary injection molding.

[0010] As a further implementation, a plurality of grooves with openings facing outwards are provided on the peripheral side of the buffer structure skeleton;

[0011] The groove passes through the buffer structure skeleton in the longitudinal direction.

[0012] As a further implementation, the cross section of the groove is trapezoidal; and a set undercut angle is formed on the inner side of the groove.

[0013] As a further implementation method, there is a set overlap amount and lap amount between the groove and the soft rubber of the buffer structure.

[0014] As a further implementation, a plurality of overflow holes are distributed on the surface of the buffer structure skeleton.

[0015] As a further implementation, the diameter of the overflow hole gradually decreases from the side close to the handle base cover to the other side.

[0016] As a further implementation method, the buffer structure skeleton is made of polyoxymethylene material, and the buffer structure soft glue is made of styrene-based thermoplastic polyester material.

[0017] In a second aspect, an embodiment of the present invention further provides a method for processing a retractable ceiling handle, comprising:

[0018] The buffer structure skeleton is injection molded, and then the molded buffer structure skeleton is placed in a secondary overmolding injection mold;

[0019] Injecting a buffer structure soft glue melt onto the surface of the buffer structure skeleton, and obtaining a buffer structure assembly after cooling;

[0020] Install the buffer structure assembly between the handle base cover and the handle base.

[0021] In a third aspect, an embodiment of the present invention further provides a car, comprising a roof, wherein the roof is equipped with the roof handle.

[0022] The beneficial effects of the present invention are as follows:

[0023] (1) The buffer structure assembly of the present invention is arranged between the handle base cover and the handle base, wherein the buffer structure assembly is composed of a buffer structure frame and a buffer structure soft rubber. The buffer structure frame provides support for the entire structure, and the buffer structure soft rubber is tightly combined with the buffer structure frame. When subjected to external force impact, the buffer structure soft rubber can effectively disperse the impact force, thereby enabling the buffer structure assembly to better play a buffering function when subjected to external forces such as collision and extrusion; it can absorb the harsh sound generated by the impact, improve the quiet experience perception of the passenger compartment, and at the same time avoid the impact of bumps and damages between plastic parts on the appearance quality.

[0024] (2) The outer shape of the buffer structure skeleton of the present invention is designed according to the inner contour of the handle base cover. At the same time, the buffer structure soft rubber is designed according to the outer contour of the handle base cover to form a continuous closed buffer layer, thereby maximally protecting the contact area between the handle base cover and the handle base, thereby optimizing the silent effect.

[0025] (3) The outer contour of the buffer structure skeleton of the present invention is provided with grooves. After the buffer structure skeleton is formed, the buffer structure soft glue melt is injected into the surface of the buffer structure skeleton. The melt enters each groove, thereby increasing the contact area between the buffer structure soft glue and the buffer structure skeleton, and the buffer structure soft glue and the buffer structure skeleton are tightly combined; the surface of the buffer structure skeleton is also provided with overflow holes. The overflow holes cooperate with the grooves to enable the buffer structure soft glue to fully wrap and cover the buffer structure skeleton, while preventing the buffer structure soft glue from separating from the buffer structure skeleton or from curling, collapsing, etc.; and by designing appropriate undercut angles a1 and a2 for the skeleton grooves, the overlap amount b and overlap amount c between the grooves and the buffer structure soft glue, and the appropriate upper and lower opening sizes d and e and undercut angle f for the skeleton overflow holes, the buffer structure soft glue and the buffer structure skeleton are fit together as one during the secondary injection molding process.

[0026] (4) The buffer structure assembly of the present invention is made by a secondary injection molding process, and when it acts between moving parts, it can absorb the strong and harsh sound generated by the impact when the handle returns to its original position. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0028] Figure 1 This is a schematic diagram of the return process of the existing retractable roof handle;

[0029] Figure 2 is a schematic diagram of the overall structure of a retractable ceiling handle according to one or more embodiments of the present invention;

[0030] Figure 3 yes Figure 2 AA section of the retractable roof handle;

[0031] Figure 4 yes Figure 2 BB cross-section of the retractable roof handle;

[0032] Figure 5 Schematic diagram of the arrangement of grooves and overflow holes of a buffer structure skeleton according to one or more embodiments of the present invention;

[0033] Figure 6is a schematic diagram of the retractable roof handle return process according to one or more embodiments of the present invention;

[0034] FIG7( a ) is a top view of a buffer structure assembly according to one or more embodiments of the present invention;

[0035] FIG7( b ) is a longitudinal cross-sectional view of a buffer structure assembly according to one or more embodiments of the present invention;

[0036] Figure 8 is a schematic diagram of an assembly process of a buffer structure assembly according to one or more embodiments of the present invention;

[0037] Figure 9 Schematic diagram of matching parameters of a retractable roof handle according to one or more embodiments of the present invention.

[0038] Among them, 1. Buffer structure assembly;

[0039] 11. Buffer structure skeleton; 12. Buffer structure soft rubber;

[0040] 111. groove; 112. overflow hole;

[0041] 2. Handle assembly;

[0042] 21. Steel handle strip; 22. Soft rubber handle; 23. Watch leather;

[0043] 3. Handle base cover; 4. Hinge structure;

[0044] 41. First hinge structure; 42. Second hinge structure;

[0045] 5. First axle pin; 6. Second axle pin; 7. Handle base; 8. Assembly screw; 9. Assembly screw. DETAILED DESCRIPTION

[0046] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0047] In the description of the present invention, the terms “first”, “second”, etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0048] Example 1:

[0049] See also Figure 1The handle base 7 in the handle assembly 2 is fixed to the vehicle body sheet metal via assembly screws 9. When the handle assembly 2 is subjected to tension, the handle base cover 3 connected to it rotates around the first and second axis pins 5 and 6 via the hinge structure 4, separating from the handle base 7, thereby maximizing the passenger's handholding space. However, when this type of ceiling handle is released and returned to its original position, even with the interaction of springs and dampers, impact, vibration, and other contact between the handle base cover 3 and the handle base 7 are unavoidable, and the abnormal noise generated during this process is even more unacceptable. The method of providing a single layer of rubber between the handle base cover 3 and the handle base 7 has the problem of the rubber pad easily falling off and curling and deforming.

[0050] Based on this, this embodiment provides a retractable roof handle, see Figure 2-Figure 4 A buffer structure assembly 1 is installed between the handle base cover 3 and the handle base 7. The buffer structure assembly 1 is connected to the handle base cover 3 by assembling screws 8, which can buffer the impact between the handle base cover 3 and the handle base 7 during the return process of the telescopic state.

[0051] The buffer structure assembly 1 includes a buffer structure skeleton 11 and a buffer structure soft glue 12. The buffer structure skeleton 11 and the buffer structure soft glue 12 adopt a secondary injection molding process. During the secondary injection molding process, the soft glue material can be well filled into the surface and gaps of the buffer structure skeleton 11, making the two more tightly combined; and the secondary injection molding can ensure that the soft glue is evenly wrapped on the skeleton. When impacted by external force, the buffer structure soft glue 12 can effectively disperse the impact force; at the same time, the buffer structure skeleton 11 provides support for the entire structure, ensuring that the structure will not be easily deformed or damaged during repeated buffering, so that the buffer structure assembly 1 can better perform its buffering function when subjected to external forces such as collision and extrusion.

[0052] The soft rubber 12 of the buffer structure deforms when subjected to force and can absorb the vibration generated by the collision between the handle base cover 3 and the handle base 7 during the return of the ceiling handle, reducing the collision and friction between the hard parts of the handle base cover 3 and the handle base 7, thereby playing a good isolation and buffering role during the extension and return process of the handle assembly 2; at the same time, it can also avoid the gap generated during the movement and improve visual perception.

[0053] In this embodiment, the buffer structure skeleton 11 is made of POM (Polyformaldehyde) material, and the buffer structure soft glue 12 is made of TPS (Thermoplastic polyester: styrene-based thermoplastic polyester); with the help of the inherent material properties of POM material, such as high strength, high rigidity, fatigue resistance, high wear resistance, excellent creep resistance suitable for long-term dynamic loads, and good dimensional stability accompanied by low water absorption, it plays a good supporting role for the buffer structure soft glue 12, avoiding the inherent characteristic defects of deformation and curling of the material of the buffer structure soft glue 12; as the wrapping material of the buffer structure, TPS can maximize its unique rubber high elasticity, weather resistance, wear resistance and shock absorption performance, buffer and absorb strongly offensive and harsh sounds, and enhance the overall quiet quality of the components.

[0054] See also Figure 3 and Figure 4 The shape of the buffer structure skeleton 11 is designed according to the inner contour of the handle base cover 3, that is, the shape of the buffer structure skeleton 11 is adapted to the inner wall of the handle base cover 3, and the two form a zero-gap fit; at the same time, the buffer structure soft rubber 12 is designed according to the outer contour of the handle base cover 3 to form a continuous and closed buffer layer, which maximizes the protection of the contact area between the handle base cover 3 and the handle base 7, thereby optimizing the silent effect.

[0055] In order to increase the contact area between the buffer structure frame 11 and the buffer structure soft glue 12 and improve the bonding strength between the two, a groove 111 is provided on the outer contour of the buffer structure frame 11; Figure 5 Several grooves 111 are provided around the buffer structure skeleton 11. The grooves 111 extend perpendicularly to the buffer structure skeleton 11 and open outward (toward the inner wall of the handle base cover 3). After the buffer structure skeleton 11 is formed, a melt of the buffer structure soft glue 12 is injected onto the surface of the buffer structure skeleton 11. The melt enters the grooves 111, increasing the contact area between the buffer structure soft glue 12 and the buffer structure skeleton 11, and forming a tight bond between the buffer structure soft glue 12 and the buffer structure skeleton 11.

[0056] In this embodiment, the cross-section of the groove 111 is a trapezoidal structure, and the size of its open end is smaller than that of the closed end. Referring to Figure 7(a), the closed end of the groove 111 forms an undercut angle a1 on one side and an undercut angle a2 on the other side. a1 and a2 can be equal or unequal. When a1 and a2 are equal, the cross-section of the groove 111 is an isosceles trapezoidal structure. The values ​​of a1 and a2 range from 65° to 75°. Too small an angle may affect the melt of the buffer structure soft glue 12 entering the corner area of ​​the groove 111. Too large an angle may affect the bonding performance of the buffer structure soft glue 12 and the buffer structure skeleton 11.

[0057] Referring to Figure 7(b), the groove 111 and the buffer structure soft glue 12 have a certain overlap b and overlap c, wherein the overlap b is 2 to 3 mm and the overlap c is 1 to 1.5 mm, further ensuring the bonding performance of the buffer structure skeleton 11 and the buffer structure soft glue 12.

[0058] See also Figure 5 The surface of the buffer structure skeleton 11 is also provided with overflow holes 112, which are used to tightly combine the buffer structure soft glue 12 with the main part of the buffer structure skeleton 11. The overflow holes 112 cooperate with the grooves 111 to enable the buffer structure soft glue 12 to fully wrap and cover the buffer structure skeleton 11, while preventing the buffer structure soft glue 12 from detaching from the buffer structure skeleton 11 or curling, collapsing, etc.

[0059] In order to further ensure the bonding performance between the buffer structure soft glue 12 and the buffer structure skeleton 11, the overflow hole 112 of this embodiment is not a uniform diameter structure. Referring to FIG7(b), the diameter of the overflow hole 112 gradually decreases from the side close to the handle base cover 3 to the other side, that is, its longitudinal cross-section is an isosceles trapezoid; according to the viewing direction shown in FIG7(b), the diameter of the upper end of the overflow hole 112 is d, and the diameter of the lower end is e. Due to the different diameters at both ends, there is an undercut angle f on the inner wall of the overflow hole 112.

[0060] In this embodiment, the upper end diameter d of the overflow hole 112 is 2.8~3.5mm, the lower end diameter e is 2.3~2.5mm, and the undercut angle f is 10°~15°. Through the above parameters, the buffer structure soft glue 12 can be better combined with the buffer structure skeleton 11 during the secondary injection molding process, so that the two are integrated into an integrated structure.

[0061] Referring to Figure 7(b), the buffer structure soft glue 12 is wrapped around the outside of the buffer structure skeleton 11. The outer edge of the buffer structure soft glue 12 has an overhanging portion. After the buffer structure soft glue 12 is engaged with the handle base cover 3, the overhanging portion is in contact with the bottom surface of the edge of the handle base cover 3. When the handle base cover 3 is buckled with the handle base 7, the overhanging portion is also in contact with the surface of the handle base 7.

[0062] See also Figure 9 The following key parameters exist when the buffer structure assembly 1 cooperates with the handle base cover 3 and the handle base 7: the thickness g of the buffer structure skeleton 11, the thickness h of the buffer structure soft glue 12, the distance j between the outer edge of the buffer structure soft glue 12 and the outer edge of the handle base cover 3, the Y-axis overlap (full circle) of the buffer structure soft glue 12 and the handle base cover 3, the distance m between the buffer structure soft glue 12 and the handle base 7, the Z-axis distance n between the buffer structure soft glue 12 and the handle base cover 3 (the distance between the bottom surface of the buffer structure soft glue 12 and the bottom surface of the handle base cover 3), and the overlap p between the buffer structure soft glue 12 and the handle base 7;

[0063] Among them, g is 2.5mm~2.8mm, h is 1.5mm~2.0mm, j is 0.5mm~1.0mm, k is 2mm~2.5mm, m is 0~0.1mm, n is 0~0.1mm, and p is 1.5mm~2.0mm. By designing the overlapping amount of the buffer structure soft glue 12 with the handle base cover 3 and the handle base 7, the overlapping amount with the handle base 7, the matching gap and other parameters between the handle base cover 3 and the handle base 7, when the ceiling handle returns to its position, the buffer structure assembly 1 can isolate the handle base cover 3 and the handle base 7 with the maximum area, absorb the harsh sound caused by the collision, and improve the quiet experience perception of the passenger compartment; at the same time, it can avoid bumps and damages between plastic parts that affect the appearance quality.

[0064] See also Figure 3 and Figure 4 The handle assembly 2 includes a handle soft rubber 22 and a handle surface leather 23 wrapped around the outside of the handle soft rubber 22. A handle steel belt 21 is provided inside the handle soft rubber 22. The handle steel belt 21 is connected to one end of the first hinge structure 41. The other end of the first hinge structure 41 is hinged to the second hinge structure 42 through the second axle pin 6. The other end of the second hinge structure 42 is hinged to the handle base 7 through the first axle pin 5. In this embodiment, the length of the first axle pin 5 is greater than the length of the second axle pin 6.

[0065] When assembling the buffer structure assembly 1 and the handle base cover 3, refer to Figure 8 , place the handle base cover 3 in the positioning tooling, use the handle base cover 3 to design the positioning pin and BOSS column structure, and make the hinge structure 4 and the handle assembly 2 coaxial with it; then use the assembly screws 8 to fix the buffer structure assembly 1 with the handle assembly 2, the handle base cover 3, and the hinge structure 4.

[0066] The buffer structure assembly 1 of this embodiment is arranged between the handle base cover 3 and the handle base 7, see Figure 6 When the roof handle returns to its original position, it can absorb the strong and harsh sound caused by the collision and improve the quiet experience of the passenger compartment. At the same time, it can avoid the impact of bumps and damages between plastic parts on the appearance quality.

[0067] Compared to a single layer of rubber, this embodiment features a tight fit between the buffer structure's soft rubber 12 and the buffer structure's skeleton 11. The skeleton 11 provides support, while the soft rubber 12 absorbs energy and acts as a buffer. This combination of the two ensures sound absorption while avoiding structural deformation, ensuring the reliability of the retractable roof handle. Furthermore, the buffer structure assembly 1 utilizes a conformal design. The buffer structure's skeleton 11 is designed to fit seamlessly with the inner contour of the handle base cover 3, while the soft rubber 12 conforms to the outer contour of the handle base cover 3. This maximizes protection of the contact area between the handle base cover 3 and the handle base 7, optimizing the quieting effect.

[0068] Example 2:

[0069] This embodiment provides a method for manufacturing a retractable ceiling handle. Based on the retractable ceiling handle described in Example 1, a buffer structure skeleton 11 is first injection-molded using a secondary injection molding process. The molded buffer structure skeleton 11 is then placed in a secondary overmolding mold. A melt of a buffer structure soft glue 12 is injected onto the surface of the buffer structure skeleton 11. After cooling, a buffer structure assembly 1 is obtained, which integrates the elastomeric material of the buffer structure soft glue 12 with the hard material of the buffer structure skeleton 11. The buffer structure assembly 1 is positioned between the handle base cover 3 and the handle base 7, and the two are connected using assembly screws 8.

[0070] Furthermore, considering that the buffer structure skeleton 11 and the buffer structure soft glue 12 belong to the matching structure of fine components, when designing the secondary injection molding mold, a vertical molding machine injection molding process is adopted, and gravity is used for vertical feeding to better ensure that the two materials are fully and firmly bonded, so that the buffer structure soft glue 12 can be fully integrated with the buffer structure skeleton 11 to avoid abnormal problems such as compression molding, bubbles or stratification that may occur during conventional horizontal molding injection molding.

[0071] The composite buffer structure produced by the secondary injection molding process in this embodiment acts between the moving parts and can absorb the strong and harsh sound generated by the impact when the handle returns to its original position.

[0072] Example 3:

[0073] This embodiment provides a car, including a roof, on which the retractable roof handles described in Example 1 are installed, especially on the roofs on both sides of the co-pilot seat and the rear seat, so that during vehicle driving, such as emergency braking, rapid turns or driving on bumpy roads, the handles can be grasped to maintain body balance.

[0074] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A retractable ceiling handle, characterized in that: It includes a buffer structure assembly, which is arranged between the handle base cover and the handle base; The buffer structure assembly includes a buffer structure skeleton and a buffer structure soft rubber connected as one body, the buffer structure skeleton is adapted to the inner contour of the handle base cover, and the buffer structure soft rubber is adapted to the outer contour of the handle base cover; the buffer structure soft rubber can absorb the vibration generated by the collision between the middle handle base cover and the handle base when deformed by force, and the buffer structure skeleton is used to support the buffer structure soft rubber.

2. The retractable ceiling handle according to claim 1, characterized in that: The buffer structure skeleton and the buffer structure soft rubber are fused together through secondary injection molding.

3. The retractable ceiling handle according to claim 1 or 2, characterized in that: The buffer structure skeleton is provided with a plurality of grooves with openings facing outwards on the periphery thereof; The groove passes through the buffer structure skeleton in the longitudinal direction.

4. The retractable ceiling handle according to claim 3, characterized in that: The cross section of the groove is trapezoidal; a set undercut angle is formed on the inner side of the groove.

5. The retractable ceiling handle according to claim 4, characterized in that: There is a set overlap amount and lap amount between the groove and the soft rubber of the buffer structure.

6. The retractable ceiling handle according to claim 1 or 2, characterized in that: A plurality of overflow holes are distributed on the surface of the buffer structure skeleton.

7. The retractable ceiling handle according to claim 6, characterized in that: The diameter of the overflow hole gradually decreases from the side close to the handle base cover to the other side.

8. The retractable ceiling handle according to claim 1 or 2, characterized in that: The buffer structure skeleton is made of polyoxymethylene material, and the buffer structure soft glue is made of styrene-based thermoplastic polyester material.

9. A method for processing a retractable ceiling handle according to any one of claims 1 to 8, characterized in that: include: The buffer structure skeleton is injection molded, and then the molded buffer structure skeleton is placed in a secondary overmolding injection mold; Injecting a buffer structure soft glue melt onto the surface of the buffer structure skeleton, and obtaining a buffer structure assembly after cooling; Install the buffer structure assembly between the handle base cover and the handle base.

10. An automobile, characterized in that: The invention comprises a roof, wherein the retractable roof handle according to any one of claims 1 to 8 is installed on the roof.

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