A car door inner handle, design method and vehicle

Abstract

The present invention specifically relates to an inner door handle, a design method and an automobile. The inner door handle includes a base, claws, a handle and an anti-disengagement structure. There are at least three claws, which are dispersedly and fixedly connected to the base. The handle is connected to the base through a rotating shaft. There is a protrusion on the handle. The anti-disengagement structure is fixedly connected to the base and is located on the side close to the base. When the handle rotates around the rotating shaft, the protrusion contacts the anti-disengagement structure. The overall size of this inner door handle is flexible, can be large or small, which is beneficial to the convenience of door layout, reduces the design difficulty and improves the design efficiency. This inner door handle is connected to the door trim panel by claws. The assembly process is simple. When disassembling, the self-structure is used to release the lock, and there is no need to disassemble the door trim panel. The layout area and angle of this inner door handle have strong adaptability and many choices, which is conducive to the play of styling creativity. This inner door handle has a simple structure and low cost.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive parts, and particularly to a door inner handle, a design method and an automobile. Background Art

[0002] The door inner handle is an operating structure installed on the door interior trim panel for opening the door from inside the vehicle. Ordinary inner handles are generally installed on the relatively flat large surface of the door interior trim panel (as shown in Figure 1 ), which has a certain decorative effect while meeting the functions. However, it also has the following problems: long design cycle and high difficulty; when arranging door parts, space is a major difficulty in itself. The inner handle occupies a large space, which will inevitably squeeze the layout space of other parts, causing layout difficulties. The process of installing and disassembling parts is complex; ordinary inner handles are generally installed and fastened with screws from the back of the door interior trim panel. The disassembly sequence is the opposite. The number of installation points is about 4 - 9. Therefore, both the installation and disassembly processes require separating the door interior trim panel from the door sheet metal and operating from the back of the door interior trim panel. Moreover, with a large number of installation points, the operation time is relatively long. It occupies a large area on the A surface of the interior styling, which is not conducive to the exertion of creativity. The appearance structure of ordinary inner handles is relatively fixed and has a large surface area. Therefore, it has more restrictions on the styling, is not conducive to the exertion of styling creativity, and has more matching structures, increasing the matching difficulty and prone to causing precision problems; the handle structure is complex, uses more materials, and has a higher cost. Summary of the Invention

[0003] Therefore, the purpose of the present invention is to solve the deficiencies in the above background art, and thus provide a door inner handle, a design method and an automobile.

[0004] A door inner handle includes a base, claws, a handle and an anti - detachment structure;

[0005] There are at least three claws, which are dispersedly and fixedly connected to the base. The handle is connected to the base through a rotating shaft. There are protrusions on the handle. The anti - detachment structure is fixedly connected to the base and is located close to one side of the base. When the handle rotates around the rotating shaft, the protrusions come into contact with the anti - detachment structure.

[0006] Further, the maximum opening angle of the handle is defined as θ, and the force applied to the handle when opening the door is defined as F 操作力 , F 操作力 The horizontal component force and the vertical component force of F 1 are respectively defined as F 2 and F 摩擦力 , and the frictional force between the base and the door trim panel is denoted as F

[0007] It is required to satisfy F 1 < F 摩擦力 , that is, F操作力 ·cos(θ) < μ·F 操作力 ·sin(θ);

[0008] It can be obtained that arccot(μ) < θ.

[0009] Furthermore, when the opening angle of the handle reaches 60% of θ, the car door opens.

[0010] Furthermore, the maximum opening angle θ of the handle (3) is < 90°.

[0011] A design method for the in - door handle of a car door based on any one of the above, comprising the following steps:

[0012] S1: Define the positions and coordinates of multiple claws on a selected plane, determine the size of the base according to the relative positions between the multiple claws, and fix each claw on the base according to the defined positions and coordinates;

[0013] S2: Select the layout points of the anti - detachment mechanism on the selected plane according to the size of the base, and fix the anti - detachment mechanism on the base;

[0014] S3: Select the position of the rotation axis according to the actual handle layout requirements and connect the handle to the base. At the same time, define the maximum opening angle θ of the handle, and the value range of θ is related to the friction coefficient μ between the base and the car door trim.

[0015] Furthermore, the multiple claws are three. The layout points of the three claws are respectively denoted as a, b, and c. The three claws are arranged in a triangle. The distance from a to b is equal to the distance from a to c. The distance between b and c is denoted as A, and the distance from a to the line connecting b and c is denoted as B. Determine the size of the base according to the values of A and B.

[0016] Furthermore, the layout point of the anti - detachment mechanism is denoted as d, and d is arranged on the perpendicular bisector of the line connecting b and c.

[0017] A car, which includes the in - door handle of a car door according to any one of the above.

[0018] The technical solution of the present invention has the following advantages:

[0019] 1. The overall size of the in - door handle in the present invention is flexible, can be large or small, which is beneficial to the convenience of car door layout, reduces the design difficulty, and improves the design efficiency.

[0020] 2. The in - door handle in the present invention is connected to the car door trim by claws. The assembly process is simple. When disassembling, the self - structure is used to release the lock, and there is no need to disassemble the car door trim.

[0021] 3. The layout area and angle of the in - door handle in the present invention have strong adaptability and many choices, which is beneficial to the exertion of styling creativity.

[0022] 4. The door inner handle structure in the present invention is simple and low in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 is the fixing method of the door inner handle in the prior art;

[0025] Figure 2 is the structural schematic diagram of the door inner handle involved in the present invention;

[0026] Figure 3 is the schematic diagram of the claw and anti - detachment structure position arrangement in the embodiment;

[0027] Figure 4 is the schematic diagram of the handle movement direction and the anti - detachment structure movement direction;

[0028] Figure 5 is the schematic diagram of the force analysis of the door handle involved in the present invention;

[0029] Figure 6 is the anti - detachment schematic diagram of the anti - detachment structure;

[0030] Figure 7 is the assembly schematic diagram of the door inner handle;

[0031] Description of the reference numerals:

[0032] 1 - base; 2 - claw; 3 - handle;

[0033] 3 - 1 - protrusion; 4 - rotating shaft; 5 - anti - detachment structure;

[0034] 6 - door trim; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The following will clearly and completely describe the technical solutions of the present invention with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0039] See also Figures 2 to 6 , a door inner handle, comprising a base 1, a claw 2, a handle 3 and an anti-slip structure 5;

[0040] There are at least three claws 2, which are dispersed and fixedly connected to the base 1. The handle 3 is connected to the base 1 through a rotating shaft 4. A protrusion 3-1 is provided on the handle 3. The anti-drop structure 5 is fixedly connected to the base 1 and is located on a side close to the base 1. When the handle 3 rotates around the rotating shaft 4, the protrusion 3-1 contacts the anti-drop structure 5. The inner handle of the vehicle door is clamped with the door guard plate 6 through at least three claws 2. At least three claws 2 constrain the five degrees of freedom of the inner handle. After the claws 2 are installed in place, the anti-drop structure 5 will be supported by the protrusion on the door guard plate 6. The anti-drop structure 5 constrains one degree of freedom of the inner handle, so that the inner handle can be completely fixed after installation. The anti-drop structure is a deformable structure.

[0041] The maximum opening angle of the handle 3 is defined as θ, and the force applied to the handle 3 when opening the door is defined as F 操作力 , F 操作力 The horizontal and vertical components are defined as F 1 and F 2 The friction force between the base 1 and the door guard plate 6 is denoted as F 摩擦力 , the friction coefficient between the base 1 and the door guard plate 6 is denoted as μ;

[0042] It is necessary to satisfy F 1 <F 摩擦力 , that is, F 操作力 ·cos(θ) < μ·F 操作力 ·sin(θ);

[0043] It can be obtained that arccot(μ) < θ.

[0044] When the opening angle of the handle 3 reaches 60% of θ, the car door opens.

[0045] The maximum opening angle θ of the handle 3 < 90°.

[0046] When the handle is rotated to a certain angle, the protrusion 3-1 on the handle 3 will contact the anti-detachment structure 5. Continuing to rotate the handle will push the anti-detachment structure 5 open; but at this time, F 摩擦力 can make the inner handle self-lock and prevent it from falling off. If it is necessary to disassemble the inner handle, a jacking force can be applied in the direction of the friction surface to achieve the disassembly of the inner handle;

[0047] The present invention also includes a design method based on the car door inner handle described in any one of the above, including the following steps:

[0048] S1: Define the positions and coordinates of multiple claws 2 on a selected plane. Determine the size of the base 1 according to the relative positions between the multiple claws 2 and fix each claw 2 on the base 1 according to the defined positions and coordinates, which can adapt to different styling styles, weight targets, and layout space requirements. The traditional car door inner handle has limitations in this regard.

[0049] S2: Select the layout points of the anti-detachment mechanism 5 on the selected plane according to the size of the base 1 and fix the anti-detachment mechanism 5 on the base 1;

[0050] S3: Select the position of the rotation axis 4 according to the actual layout requirements of the handle 3 and connect the handle 3 to the base 1. At the same time, define the maximum opening angle θ of the handle 3. The value range of θ is related to the friction coefficient μ between the base 1 and the car door trim 6. After the materials of the base 1 and the car door trim 6 are determined, the friction coefficient is a known parameter.

[0051] In this embodiment, the multiple claws 2 are three. The layout points of the three claws 2 are respectively denoted as a, b, and c. The three claws 2 are arranged in a triangle. The distance from a to b is equal to the distance from a to c. The distance between b and c is denoted as A, and the distance from a to the connection line of bc is denoted as B. Determine the size of the base 1 according to the values of A and B.

[0052] The layout point of the anti-detachment mechanism 5 is denoted as d, and d is arranged on the perpendicular bisector of the connection line of bc to make the fixation of the inner handle more firm.

[0053] After the design is completed, the inner door handle meets the following performance requirements:

[0054] During the assembly process, simply snap the claw 2 into place, push it to the end, and the anti - detachment structure 5 will automatically snap in, completing the installation of the inner door handle;

[0055] When the opening angle of the handle reaches about 60% of θ degrees, the inner handle is in a normal working state. Operating to this angle enables the door to be opened;

[0056] When the handle is further pulled to the maximum angle θ, at this time the anti - detachment mechanism 5 is pushed open and the anti - detachment fails. However, at this time, due to F 摩擦力 it can prevent the inner handle from falling off, avoiding the inner handle falling off caused by misoperation;

[0057] When the handle is pulled to the maximum angle θ, applying a directional force on the base can detach the inner handle.

[0058] The present invention also includes an automobile. The automobile includes the inner door handle described in any one of the above. The overall size of this inner door handle is flexible, it can be large or small, which is beneficial to the convenience of door layout, reduces the design difficulty, and improves the design efficiency. This inner door handle is connected to the door trim panel by a claw. The assembly process is simple. When disassembling, the self - structure is used to release the lock, and there is no need to disassemble the door trim panel; the layout area and angle of this inner door handle have strong adaptability and more choices, which is conducive to the play of styling creativity; this inner door handle has a simple structure and low cost.

[0059] Obviously, the above - mentioned embodiments are only examples clearly described and not limitations on the implementation manners. For those of ordinary skill in the art, based on the above description, other different forms of changes or modifications can be made. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. An interior door handle, characterized in that, it includes a base (1), a claw (2), a handle (3) and an anti - detachment structure (5); at least three claws (2) are provided, and they are dispersedly and fixedly connected to the base (1). The handle (3) is connected to the base (1) through a rotating shaft (4). A protrusion (3 - 1) is provided on the handle (3). The anti - detachment structure (5) is fixedly connected to the base (1) and is located on the side close to the base (1). When the handle (3) rotates around the rotating shaft (4), the protrusion (3 - 1) contacts the anti - detachment structure (5). The interior door handle is snap - connected to the door trim (6) through at least three claws (2); The maximum opening angle of the handle (3) is defined as θ, and the force applied to the handle (3) when opening the door is defined as F 操作力 , F 操作力 The component force in the horizontal direction and the component force in the vertical direction are respectively defined as F 1 and F 2 , and the frictional force between the base (1) and the door trim (6) is denoted as F 摩擦力 , and the coefficient of friction between the base (1) and the door trim (6) is denoted as μ; It is necessary to satisfy F 1 <F 摩擦力 , that is, F 操作力 ·cos(θ) < μ·F 操作力 ·sin(θ); arccot(μ) < θ can be obtained.

2. The interior door handle according to claim 1, characterized in that, when the opening angle of the handle (3) reaches 60% of θ, the door opens.

3. The interior door handle according to claim 1, characterized in that, the maximum opening angle θ of the handle (3) < 90°.

4. A design method for the interior door handle according to any one of claims 1 - 3, characterized in that, it includes the following steps: S1: Define the positions and coordinates of multiple claws (2) on a selected plane. Determine the size of the base (1) according to the relative positions between the multiple claws (2), and fix each claw (2) on the base (1) according to the defined positions and coordinates; S2: Select the layout point of the anti - detachment structure (5) on the selected plane according to the size of the base (1), and fix the anti - detachment structure (5) on the base (1); S3: Select the position of the rotating shaft (4) according to the actual layout requirements of the handle (3) and connect the handle (3) to the base (1). At the same time, define the maximum opening angle θ of the handle (3), and the value range of θ is related to the friction coefficient μ between the base (1) and the door trim (6).

5. The method according to claim 4, characterized in that, the multiple claws (2) are three. The layout points of the three claws (2) are respectively denoted as a, b, and c. The three claws (2) are arranged in a triangle. The distance from a to b is equal to the distance from a to c. The distance between b and c is denoted as A, and the distance from a to the line connecting b and c is denoted as B. Determine the size of the base (1) according to the values of A and B.

6. The method according to claim 5, characterized in that, the layout point of the anti - detachment structure (5) is denoted as d, and d is arranged on the perpendicular bisector of the line connecting b and c.

7. A vehicle, characterized in that, the vehicle includes the interior door handle according to any one of claims 1 - 3.

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