A deformable clamping structure

Abstract

The present invention provides a deformable clamping structure, which includes a clamping member and a clamping component. The clamping member includes a supporting portion, an elastic limiting portion and a hook portion provided on the supporting portion. A through hole is formed at the connection between the elastic limiting portion and the supporting portion. The hook portion is located at the through hole, and a first guiding surface is provided on the side of the hook portion opposite to the through hole. The clamping component includes a base portion and a tongue provided on the base portion. A clamping groove for cooperating with the hook portion is provided on the tongue, and a second guiding surface for cooperating with the first guiding surface is provided at the end of the tongue far from the base portion. When the tongue is inserted into the through hole under force, the first guiding surface and the second guiding surface are in contact and apply pressure, and the tongue and the elastic limiting portion are elastically deformed under force so that the tongue passes through the through hole, the hook portion is inserted into the clamping groove, and the elastic limiting portion abuts against the side wall of the base portion. The deformable clamping structure of the present invention can solve the problems that when there is a negative draft angle on the molding surface of the clamping area, the clamping structure cannot be arranged, or the clamping is not firm, and the appearance quality is poor.

Description

Technical Field

[0001] The present invention relates to the field of automotive parts, and particularly to a deformable clamping structure. Background Art

[0002] At present, automotive OEMs pay more and more attention to aerodynamics, and often set some air ducts at the front bumper, rear bumper, D-pillars and other positions to reduce wind resistance and achieve the purpose of optimizing aerodynamics. Taking the example of setting an air duct at the position of the front bumper, the air duct component needs to be clamped to the front bumper. When there is no negative angle on the styling surface (CAS surface) of the clamping area, the clamping between the air duct component and the front bumper can be realized through the conventional hook and slot matching structure, and the gap surface difference at the split between the two can also be well controlled.

[0003] However, when there is a negative angle on the styling surface (CAS surface) of the clamping area, the clamping structure and the air duct component 3 will interfere with each other, and the conventional clamping structure cannot be arranged. As Figure 1 shown, when such a styling surface appears, generally an insert piece 5 is used to limit the Y direction of the front bumper 4, but there is no effective connection point in the X direction, the clamping is not firm, and the X-direction gap cannot be guaranteed, resulting in poor appearance quality. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a deformable clamping structure, which can at least solve the technical problems in the prior art that when there is a negative angle in the mold release on the styling surface of the clamping area, the clamping structure cannot be arranged, or the clamping is not firm, and the appearance quality is poor.

[0005] In order to solve the technical problems in the background art, the technical solution adopted by the present invention is: to provide a deformable clamping structure, including a buckle member and a clamping member,

[0006] The buckle member includes a support portion and an elastic limiting portion and a hook portion provided on the support portion. A through hole is formed at the connection between the elastic limiting portion and the support portion. The hook portion is located at the through hole, and a first guiding surface is provided on the side of the hook portion opposite to the through hole;

[0007] The clamping member includes a base portion and a tongue provided on the base portion. A slot for cooperating with the hook portion is provided on the tongue, and a second guiding surface for cooperating with the first guiding surface is provided at the end of the tongue far from the base portion; when the tongue is inserted into the through hole under force, the first guiding surface can be in contact with the second guiding surface and apply pressure to the second guiding surface, and the tongue and the elastic limiting portion are elastically deformed under force, so that the tongue passes through the through hole, the hook portion is inserted into the slot, and the elastic limiting portion abuts against the side wall of the base portion.

[0008] With the above snap-fit structure, in the case where there is a negative angle on the shaping surface of the snap-fit area, the first and second guiding surfaces and the elastic limiting part are reasonably set. During installation, the tongue of the snap-fit part is inserted into the through-hole on the snap-fastening part. Under the guiding action of the first and second guiding surfaces, both the tongue of the snap-fit part and the elastic limiting part on the snap-fastening part undergo elastic deformation. The tongue is bent under force and passes through the through-hole. The slot on the tongue cooperates with the hook part of the snap-fastening part to realize the connection between the snap-fit part and the snap-fastening part. Moreover, the elastic limiting part can abut against the base part below the tongue, restricting the position of the base part. Under the action of the holding force of the elastic limiting part, the snap-fit structure is more reliable and can better control the gap surface difference at the split seam, improving the appearance quality of the snap-fit structure.

[0009] Further, the inclination angles of the first guiding surface and the second guiding surface are 30° - 60°.

[0010] Further, when the hook part is inserted into the slot, the clamping angle between the hook part and the tongue is 10° - 15°, and the clamping amount between the hook part and the tongue is 1.5 - 1.8 mm.

[0011] Further, the hook part is a hollow shell structure, and the wall thickness of the top of the hook part in contact with the inner wall of the slot is 0.6 - 1 mm. Preferably, the wall thickness of the top of the hook part is 0.8 mm, which is convenient for cutting glue and preventing shrinkage marks.

[0012] Further, the snap-fastening part includes a guiding part, which is arranged on the side opposite to the elastic limiting part and below the elastic limiting part, and the side of the guiding part opposite to the supporting part has a third guiding surface for guiding the snap-fit part to insert into the through-hole.

[0013] Further, the distance between the third guiding surface and the supporting part is greater than the width of the through-hole. When the tongue is inserted into the through-hole and is clamped with the hook part in place, the tongue is bent. The elastic limiting part abuts against the outer wall of the base part. Under the action of force, the bottom end of the base part will also bend to the same side as the tongue bends. When bent to a certain extent, the third guiding surface abuts against the base part, restricting the position of the base part and avoiding the gap between the snap-fastening part and the snap-fit part from becoming larger due to further bending, so that the gap surface difference at the split seam between the two can be better controlled, improving the appearance quality of the snap-fit structure.

[0014] Further, when the tongue is inserted into the through-hole, the maximum distance between the third guiding surface and the base part is 0.2 mm.

[0015] Further, the number of the guiding parts is multiple, and the multiple guiding parts are spaced along the length direction of the through-hole.

[0016] Further, the guiding portion is strip-shaped and extends along the side wall of the elastic limiting portion in the insertion direction of the fastening member.

[0017] Further, the elastic limiting portion is a shrapnel structure.

[0018] Further, the elastic limiting portion includes a connecting portion and an extending portion. One end of the connecting portion is connected to the supporting portion to form the through hole, and the other end of the connecting portion extends in the insertion direction of the fastening member to form the extending portion. A plurality of the guiding portions are provided on the side of the extending portion opposite to the supporting portion.

[0019] Further, a weakening groove is provided at the connection between the tongue and the base portion. The weakening groove is distributed along the length direction of the connection between the tongue and the base portion, and is used to prevent cracking caused by stress concentration when the tongue is bent and deformed.

[0020] Further, the cross-section of the weakening groove is arc-shaped, and the connection between the tongue and the base portion is arc-transitioned through the weakening groove.

[0021] Further, a light leakage prevention step is provided on the supporting portion. The light leakage prevention step is located at the gap between the supporting portion and the base portion, and is used to shield the internal structure of the clamping structure to prevent seeing through, thereby improving the appearance quality of the clamping structure.

[0022] Further, the light leakage prevention step is located at a position opposite to the weakening groove on the supporting portion.

[0023] Further, the height by which the light leakage prevention step protrudes from the supporting portion is not less than the minimum gap between the supporting portion and the base portion, so as to prevent seeing through.

[0024] Further, the width of the tongue is not less than 15 mm, ensuring the strength of the tongue.

[0025] For the deformable clamping structure provided by the present invention, in view of the situation that there is a negative draft angle on the molded surface of the shape CAS, a hook, a first guiding surface and an elastic limiting part are arranged on the clamping part, and a tongue, a second guiding surface, a clamping groove and a base part are arranged on the engaging part. During the installation process, the guiding structure composed of the first and second guiding surfaces forces the tongue to deform into a preset state. In cooperation with the hook and the elastic limiting part, the clamping groove on the tongue cooperates with the hook part of the clamping part to realize the connection between the engaging part and the clamping part, and the elastic limiting part can abut against the base part below the tongue to limit the position of the base part, making the clamping structure more reliable. The above-mentioned deformable clamping structure, on the basis of protecting the shaping intention and fully respecting the shape, does not change the negative draft angle of the shape. Through the cooperation of the above-mentioned clamping part and the engaging part, the effective connection points are increased, and the gap surface difference at the joint of the two can be better controlled, improving the appearance quality of the clamping structure. Moreover, the structure is simple, the requirement for the clamping space is small, and the installation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 is a schematic diagram of the insertion piece limiting structure adopted in the prior art in the clamping area;

[0028] Figure 2 is a schematic diagram of the interference between the clamping structure and the air duct component in the embodiment of the present invention;

[0029] Figure 3 is a first schematic diagram of the deformable clamping structure in the embodiment of the present invention;

[0030] Figure 4 is a second schematic diagram of the deformable clamping structure in the embodiment of the present invention;

[0031] Figure 5 is a schematic diagram of the structure of the clamping part in the embodiment of the present invention;

[0032] Figure 6 is a schematic diagram of the structure of the hook part in the embodiment of the present invention;

[0033] Figure 7 is a schematic diagram of the structure of the engaging part in the embodiment of the present invention;

[0034] Figure 8 is Figure 7 a partial enlarged schematic diagram of part A in

[0035] Figure 9 isFigure 8 Partial enlarged schematic view at position B in the middle

[0036] Among them, the corresponding reference numerals in the figure are: 1 - snap member, 11 - support portion, 12 - elastic limiting portion, 121 - connecting portion, 122 - extending portion, 13 - hook portion, 131 - first guiding surface, 14 - through hole, 15 - guiding portion, 151 - third guiding surface, 16 - light leakage prevention step, 2 - engaging member, 21 - base portion, 22 - tongue, 221 - card slot, 222 - second guiding surface, 23 - weakening groove, 3 - air duct component, 4 - front bumper, 5 - insert piece. Specific implementation manners

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0038] Embodiment:

[0039] This embodiment provides a deformable clamping structure, as shown in Figure 3 , Figure 4 and Figure 7 . The deformable clamping structure includes a snap member 1 and an engaging member 2.

[0040] The snap member 1 includes a support portion 11 and an elastic limiting portion 12 and a hook portion 13 provided on the support portion 11. A through hole 14 is formed at the connection between the elastic limiting portion 12 and the support portion 11. The hook portion 13 is located at the through hole 14. A first guiding surface 131 is provided on the side of the hook portion 13 opposite to the through hole 14.

[0041] The engaging member 2 includes a base portion 21 and a tongue 22 provided on the base portion 21. A card slot 221 for cooperating with the hook portion 13 is provided on the tongue 22. One end of the tongue 22 away from the base portion 21 has a second guiding surface 222 for cooperating with the first guiding surface 131. When the tongue 22 is inserted into the through hole 14 under force, the first guiding surface 131 can be in contact with the second guiding surface 222 and apply pressure to the second guiding surface 222. The tongue 22 and the elastic limiting portion 12 are elastically deformed under force, so that the tongue 22 passes through the through hole 14, the hook portion 13 is inserted into the card slot 221, and the elastic limiting portion 12 abuts against the side wall of the base portion 21.

[0042] Taking the setting of an air duct at the position of the front bumper 4 as an example, the air duct component 3 needs to be snap-fitted with the front bumper 4. However, when there is a negative angle on the modeling surface (CAS surface) of the snap-fitting area, the snap-fitting structure and the air duct component 3 will interfere with each other. As Figure 2 shown, the P area is the state where the snap-fitting structure and the air duct component 3 interfere with each other, and a conventional snap-fitting structure simply cannot be arranged and effectively connected.

[0043] While as Figure 3 shown, by adopting the above deformable snap-fitting structure, both the buckle 1 and the engaging part 2 have a certain elastic deformation ability. In view of the situation where there is a negative angle on the modeling surface of the snap-fitting area, the first guiding surface 131, the second guiding surface 222 and the elastic limiting part 12 are reasonably set. During installation, the tongue 22 of the engaging part 2 is inserted into the through hole 14 on the buckle 1. Under the guiding action of the first guiding surface 131 and the second guiding surface 222, as Figure 3 shown by the dotted line part in, the tongue 22 is in the state before deformation, and the tongue 22 interferes with the supporting part 11 and cannot form an effective snap connection. While as Figure 3 shown by the solid line part in, the tongue 22 is in the state after deformation. Both the tongue 22 and the elastic limiting part 12 on the buckle 1 undergo elastic deformation. The tongue 22 is bent under force and passes through the through hole 14. The slot 221 on the tongue 22 cooperates with the hook part 13 of the buckle 1 to realize the connection between the engaging part 2 and the buckle 1, and the elastic limiting part 12 can abut against the base 21 below the tongue 22 to limit the position of the base 21. Under the action of the holding force of the elastic limiting part 12, the snap-fitting structure is more reliable and can better control the gap surface difference at the split seam, improving the appearance quality of the snap-fitting structure.

[0044] Certainly, the deformable snap-fitting structure described in the embodiment of the present invention is not limited to the snap-fitting of the air duct and the bumper, and can also be applied to all situations where there is a negative angle on a similar modeling surface.

[0045] Specifically, the inclination angles of the first guiding surface 131 and the second guiding surface 222 are 30° - 60°. Preferably, the inclination angle of the first guiding surface 131 is 60°, and the inclination angle of the second guiding surface 222 is 45°.

[0046] Preferably, when the hook part 13 is inserted into the slot 221, the snap-fitting angle between the hook part 13 and the tongue 22 is 10° - 15°, and the snap-fitting amount between the hook part 13 and the tongue 22 is 1.5 - 1.8 mm, that is, the size of the included angle between the hook part 13 and the inner wall of the slot 221 is 10° - 15°, and the width of the contact surface between the hook part 13 and the inner wall of the slot 221 is 1.5 - 1.8 mm.

[0047] In a possible implementation manner, as Figure 3, Figure 4 and Figure 5 As shown in Figure 4 and Figure 5 , the buckle 1 further includes a guiding portion 15. The guiding portion 15 is disposed on the side of the elastic limiting portion 12 opposite to the supporting portion 11 and below the elastic limiting portion 12. The side of the guiding portion 15 opposite to the supporting portion 11 has a third guiding surface 151 for guiding the engaging member 2 to insert into the through hole 14.

[0048] Specifically, the distance between the third guiding surface 151 and the supporting portion 11 is greater than the width of the through hole 14. Preferably, when the tongue 22 inserts into the through hole 14, the maximum distance between the third guiding surface 151 and the base 21 is 0.2 mm. When the base 21 is not bent, the gap between the third guiding surface 151 and the outer wall of the base 21 is 0.2 mm, that is, the maximum displacement amplitude of the base 21 in the horizontal direction when it is bent is 0.2 mm. When the base 21 is bent to the maximum displacement amplitude in the horizontal direction reaching 0.2 mm, it abuts against the third guiding surface 151. When the tongue 22 is inserted into the through hole 14 under the guidance of the third guiding surface 151 and is clamped with the hook portion 13 in place, the tongue 22 is bent, and the elastic limiting portion 12 abuts against the outer wall of the base 21. Under the action of force, the bottom end of the base 21 will also bend to the same side along with the bending of the tongue 22. When bent to a certain extent, the third guiding surface 151 abuts against the base 21 to limit the position of the base 21, avoiding the gap between the buckle 1 and the engaging member 2 from becoming larger due to further bending, so that the gap surface difference at the split of the two can be better controlled, and the appearance quality of the clamping structure is improved.

[0049] In a possible implementation manner, the number of the guiding portions 15 is multiple, and the multiple guiding portions 15 are spaced along the length direction of the through hole 14, which can support and limit the base 21 in an all-round manner, so that the gap surface difference at the split of the two can be better and more comprehensively controlled, and the appearance quality of the clamping structure is further improved.

[0050] In a possible implementation manner, the guiding portion 15 is strip-shaped, and the guiding portion 15 extends along the side wall of the elastic limiting portion 12 in the inserting direction of the buckle 1, increasing the contact area between the guiding portion 15 and the base 21, better supporting and limiting the base 21, and contributing to improving the appearance quality of the clamping structure.

[0051] In a possible implementation, the elastic limiting portion 12 is a shrapnel structure. Specifically, the elastic limiting portion 12 further includes a connecting portion 121 and an extending portion 122. One end of the connecting portion 121 is connected to the supporting portion 11 to form the through hole 14, and the other end of the connecting portion 121 extends in the direction of insertion of the buckle member 1 to form the extending portion 122. A plurality of the guiding portions 15 are provided on the side of the extending portion 122 opposite to the supporting portion 11, and the structure is more compact and reasonable. When the tongue 22 of the engaging member 2 is inserted into the through hole 14 on the buckle member 1 and is engaged with the hook portion 13 in place, both the tongue 22 and the elastic limiting portion 12 on the buckle member 1 undergo elastic deformation. The bottom end of the base portion 21 will also bend toward the same side along with the bending of the tongue 22. The connecting portion 121 of the elastic limiting portion 12 abuts against the upper end of the base portion 21, restricting the position of the base portion 21 while maintaining the firmness of the engaging structure. The guiding portion 15 on the extending portion 122 abuts against the lower end of the base portion 21, restricting the position of the base portion 21 to prevent the gap between the buckle member 1 and the engaging member 2 from becoming larger due to further bending, and ensuring the appearance quality of the engaging structure.

[0052] In a possible implementation, as Figure 6 shown, the hook portion 13 is a hollow shell structure, and the wall thickness of the top of the hook portion 13 that abuts against the inner wall of the card slot 221 is 0.6 - 1 mm. Preferably, the wall thickness of the top of the hook portion 13 is 0.8 mm, which can prevent sink marks and facilitate glue cutting.

[0053] In a possible implementation, as Figure 7 、 Figure 8 and Figure 9 shown, a weakening groove 23 is provided at the connection between the tongue 22 and the base portion 21. The weakening groove 23 is distributed along the length direction of the connection between the tongue 22 and the base portion 21. The weakening groove 23 is used to prevent cracking due to stress concentration when the tongue 22 is bent and deformed. The width of the tongue 22 is not less than 15 mm, which ensures the strength of the tongue 22, and the width of the base portion 21 is greater than the width of the tongue 22.

[0054] In a possible implementation, the cross-section of the weakening groove 23 is circular arc-shaped, and the connection between the tongue 22 and the base portion 21 has an arc transition through the weakening groove 23. Preferably, the cross-section of the weakening groove 23 is semi-circular arc-shaped, and the diameter of the weakening groove 23 is 0.8 mm - 1.5 mm. In this embodiment, the weakening groove is a semi-circular arc line with a diameter of 1 mm.

[0055] In a possible implementation, as Figure 3 and Figure 4As shown, a light leakage prevention step 16 is further provided on the support portion 11. The light leakage prevention step 16 is located at the gap between the support portion 11 and the base portion 21, and is used to shield the internal structure of the clamping structure to prevent see-through, thereby improving the appearance quality of the clamping structure.

[0056] Preferably, the light leakage prevention step 16 is located at a position opposite to the weakening groove 23 on the support portion 11.

[0057] Specifically, the height by which the light leakage prevention step 16 protrudes from the support portion 11 is 0.2 - 0.3 mm, the minimum gap between the support portion 11 and the base portion 21 is 0.2 mm, and the height by which the light leakage prevention step 16 protrudes from the support portion 11 is not less than the minimum gap between the support portion 11 and the base portion 21, so as to prevent see-through.

[0058] For the deformable clamping structure provided in the embodiment of the present invention, in view of the situation that there is a draft negative angle on the modeling CAS surface, a hook, a first guiding surface 131 and an elastic limiting portion 12 are provided on the buckle member 1, and a tongue 22, a second guiding surface 222, a clamping groove 221 and a base portion 21 are provided on the engaging member 2. During the installation process, the guiding structure composed of the first guiding surface 131 and the second guiding surface 222 forces the tongue 22 to deform into a preset state. In cooperation with the hook and the elastic limiting portion 12, the clamping groove 221 on the tongue 22 cooperates with the hook portion 13 of the buckle member 1 to realize the connection between the engaging member 2 and the buckle member 1, and the elastic limiting portion 12 can abut against the base portion 21 below the tongue 22 to limit the position of the base portion 21, making the clamping structure more reliable. The above-mentioned deformable clamping structure, on the basis of protecting the modeling intention and fully respecting the modeling, does not change the modeling negative angle. Through the cooperation of the above-mentioned buckle member 1 and the engaging member 2, the number of effective connection points is increased, and the gap surface difference at the split between the two can be better controlled, improving the appearance quality of the clamping structure. Moreover, the structure is simple, the requirement for the clamping space is small, and the installation is convenient.

[0059] The above-disclosed are only several preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A deformable clamping structure, characterized in that: It includes a buckle member (1) and a engaging member (2). The buckle member (1) includes a support portion (11), an elastic limiting portion (12) and a hook portion (13) provided on the support portion (11). A through hole (14) is formed at the connection between the elastic limiting portion (12) and the support portion (11). The hook portion (13) is located at the through hole (14). A first guiding surface (131) is provided on a side of the hook portion (13) opposite to the through hole (14). The engaging member (2) includes a base portion (21) and a tongue (22) provided on the base portion (21). A clamping groove (221) for cooperating with the hook portion (13) is provided on the tongue (22). A second guiding surface (222) for cooperating with the first guiding surface (131) is provided at one end of the tongue (22) away from the base portion (21). When the tongue (22) is inserted into the through hole (14) under force, the first guiding surface (131) can be in contact with the second guiding surface (222) and apply pressure to the second guiding surface (222). The tongue (22) and the elastic limiting portion (12) are elastically deformed under force, so that the tongue (22) passes through the through hole (14), the hook portion (13) is inserted into the clamping groove (221), and the elastic limiting portion (12) abuts against the side wall of the base portion (21). A light leakage prevention step (16) is provided on the support portion (11), and the light leakage prevention step (16) is located at a gap between the support portion (11) and the base portion (21). The buckle member (1) includes a guiding portion (15). The guiding portion (15) is provided on a side of the elastic limiting portion (12) opposite to the support portion (11) and below the elastic limiting portion (12). A third guiding surface (151) for guiding the engaging member (2) to be inserted into the through hole (14) is provided on a side of the guiding portion (15) opposite to the support portion (11).

2. The deformable snap-fit structure according to claim 1, characterized in that: The inclination angles of the first guiding surface (131) and the second guiding surface (222) are 30° - 60°.

3. The deformable snap-fit structure according to claim 1, wherein: When the hook portion (13) is inserted into the clamping groove (221), the clamping angle between the hook portion (13) and the tongue (22) is 10° - 15°, and the clamping amount between the hook portion (13) and the tongue (22) is 1.5 - 1.8 mm.

4. The deformable snap connection structure according to claim 1, characterized in that: The distance between the third guiding surface (151) and the support portion (11) is greater than the width of the through hole (14).

5. The deformable snap connection structure according to claim 4, wherein: When the tongue (22) is inserted into the through hole (14), the maximum distance between the third guiding surface (151) and the base portion (21) is 0.2 mm.

6. The deformable snap connection structure according to claim 1, wherein: A weakening groove (23) is provided at the connection between the tongue (22) and the base portion (21), and the weakening groove (23) is distributed along the length direction of the connection between the tongue (22) and the base portion (21).

7. The deformable snap-fit structure according to claim 6, characterized in that: The cross section of the weakening groove (23) is arc-shaped.

8. The deformable snap connection structure according to claim 6, wherein: The light leakage prevention step (16) is located at a position of the support portion (11) opposite to the weakening groove (23), and the height by which the light leakage prevention step (16) protrudes from the support portion (11) is not less than the minimum gap between the support portion (11) and the base portion (21).

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