A reinforcing positioning structure for a flexible injection molded assembly

Abstract

This utility model relates to the technical field of connection structures for easily deformable injection molded parts, and discloses a reinforced positioning structure for easily deformable injection molded assemblies. It includes an easily deformable injection molded part and a mating part connected to each other. The B-side of the easily deformable injection molded part has a snap-fit ​​groove along its edge line for engaging with the mating part. A reinforcing part is fixedly connected to the B-side of the easily deformable injection molded part. One end of the reinforcing part protrudes from the sidewall of the snap-fit ​​groove, and the end of the reinforcing part protruding from the sidewall of the snap-fit ​​groove forms a limiting space with the snap-fit ​​groove for limiting and fixing the mating part. This utility model patent solves the problems of poor structural strength and surface defects that easily occur after assembly in existing easily deformable injection molded assemblies.

Description

Technical Field

[0001] This utility model relates to the technical field of connection structures for easily deformable injection molded parts, and specifically to a reinforced positioning structure for easily deformable injection molded assemblies. Background Technology

[0002] Currently, many automotive parts are manufactured using injection molding. Some injection molded parts are connected using a snap-fit ​​method. Specifically, a snap-fit ​​groove is formed on the edge of side B of one injection molded part, and a protrusion that mates with the snap-fit ​​groove is formed on the edge of another injection molded part. When the two injection molded parts are snap-fitted together, the protrusion is inserted into the snap-fit ​​groove, the end of the protrusion abuts against the side wall of the snap-fit ​​groove, and the side of the protrusion fits against the bottom wall of the snap-fit ​​groove, thus facilitating the installation and connection of the two injection molded parts.

[0003] For some large-area, irregularly shaped shell parts, such as the protective cover for a car steering wheel, the shell parts are prone to deformation during injection molding due to differences in shrinkage between surface A and surface B, as well as other factors, because of their small thickness, large area, and irregular shape. When these easily deformable injection molded parts are connected to other mating parts, on the one hand, the large surface area and thin thickness of the easily deformable injection molded parts result in low overall structural strength, making them prone to deformation and damage during installation, fixing, and use. On the other hand, because of their large surface area and thin thickness, the easily deformable injection molded parts are prone to deformation after injection molding due to differences in shrinkage rates between surface A and surface B. When they are snapped together with the mating parts, although the protrusions can engage with the snap-fit ​​grooves, when the easily deformable injection molded parts deform towards surface A, surface differences can easily occur after assembly with surface A of the mating parts, affecting the appearance quality of the assembled product. Utility Model Content

[0004] The present invention aims to provide a reinforced positioning structure for easily deformable injection molded parts, so as to solve the problems of poor structural strength and surface defects that easily occur in easily deformable injection molded parts in the prior art.

[0005] To solve the above problems, the present invention adopts the following technical solution: a reinforced positioning structure for easily deformable injection molded parts, including an easily deformable injection molded part and a mating part connected to each other. The B-side of the easily deformable injection molded part is provided with a snap-fit ​​groove along the edge line of the easily deformable injection molded part to engage with the mating part. A reinforcing part is fixedly connected to the B-side of the easily deformable injection molded part. One end of the reinforcing part protrudes from the side wall of the snap-fit ​​groove. The end of the reinforcing part protruding from the side wall of the snap-fit ​​groove and the snap-fit ​​groove form a limiting space for limiting and fixing the mating part.

[0006] The principle and beneficial effects of this application are as follows: In this application, when the easily deformable injection molded part is connected to the mating part, a snap-fit ​​groove is provided on the B-side of the easily deformable injection molded part along its edge line. The snap-fit ​​groove has a side wall and a bottom wall, with the bottom wall facing the B-side of the easily deformable injection molded part. When the mating part is provided, a protruding structure as described in the technology can be formed at the end of the mating part. When the easily deformable injection molded part and the mating part are engaged, the protruding end on the mating part abuts against the side wall of the snap-fit ​​groove, and the side wall of the protrusion facing the A-side of the mating part fits against the bottom wall of the snap-fit ​​groove, so that the mating part and the easily deformable injection molded part are engaged. Furthermore, under the blocking effect of the bottom wall of the snap-fit ​​groove, the protrusion cannot move in a direction other than the A-side of the easily deformable injection molded part, effectively ensuring the stability of the engagement.

[0007] In this application, a reinforcing part is fixedly connected to the B side of the deformable injection molded part. The reinforcing part is used to improve the structural strength of the deformable injection molded part. After setting the reinforcing part, not only can the shrinkage deformation of the deformable injection molded part during the injection molding process be reduced and the injection molding accuracy of the product be improved, but also the stress deformation of the deformable injection molded part can be reduced during the installation and fixation of the deformable injection molded part and subsequent use, so that the connection between the deformable injection molded part and the mating part is more stable.

[0008] Furthermore, since one end of the reinforcing part in this application protrudes beyond the end of the easily deformable injection molded part from the side wall of the snap-fit ​​groove, the end of the reinforcing part protruding beyond the side wall of the snap-fit ​​groove and the snap-fit ​​groove form a limiting space. When the mating part and the easily deformable injection molded part are snapped and fixed, when the protruding structure of the mating part is inserted into the snap-fit ​​groove, the limiting space formed by the reinforcing part and the snap-fit ​​groove can also play a snap-fit ​​limiting and positioning role for the protruding structure. In particular, the end of the reinforcing part can exert a squeezing effect on the mating part in a direction beyond the A surface of the easily deformable injection molded part, ensuring that the A surface of the snap-fit ​​part is flush with the A surface of the easily deformable injection molded part when the mating part and the easily deformable injection molded part are snapped together, avoiding surface differences after assembly and improving the appearance quality of the product.

[0009] Therefore, by adopting the technical solution in this application, the reinforcing part can not only improve the structural strength of the easily deformable injection molded part, but also limit and position the easily deformable injection molded part and the mating part during the snap-fit ​​installation process, so as to avoid the surface difference defect of the product A surface after assembly. The reinforcing part has a simple structure and multiple functions.

[0010] Preferably, as an improvement, the reinforcing part is provided with a guide part that mates with the mating part on the side facing the snap-fit ​​groove.

[0011] In this design, a guide is provided on the side of the reinforcing part facing the snap-fit ​​groove. When the end of the mating part is snapped and fixed in the limiting space, the guide can guide the insertion of the end of the mating part, making the assembly of the easily deformable injection molded part and the mating part more precise and efficient.

[0012] Preferably, as an improvement, the reinforcing part includes reinforcing ribs integrally formed on the deformable injection molded part.

[0013] In this design, the reinforcing part is a reinforcing rib integrally molded on surface B of the deformable injection molded part. The reinforcing rib is easy to process and mold, and the connection between the reinforcing rib and the deformable injection molded part is stable, which can form a stable limiting and fixing relationship with the mating part.

[0014] Preferably, as an improvement, the reinforcing rib forms an angle with the edge line of the volatile injection molded part, and the height of the reinforcing rib protruding from the B-side of the volatile injection molded part gradually decreases from the end of the reinforcing rib closest to the snap-fit ​​groove to the other end.

[0015] The closer to the edge of a volatile injection molded part, the lower its structural strength, and the more prone it is to deformation and damage during molding and use. In this design, the end of the reinforcing rib near the locking groove protrudes more from the B-side of the volatile injection molded part, while the other end is lower. Therefore, the closer to the edge of the volatile injection molded part, the stronger the structural reinforcement effect of the reinforcing rib, which is consistent with the product characteristic of the volatile injection molded part being prone to deformation and damage. Thus, the reinforcing rib can provide better structural reinforcement for the volatile injection molded part. In addition, the end of the reinforcing rib near the locking groove is larger, making the connection between the end of the reinforcing rib and the volatile injection molded part more stable. This can specifically improve the structural strength of the end of the reinforcing rib near the locking groove, thereby making the end of the reinforcing rib provide a more stable and limiting effect on the mating parts.

[0016] Preferably, there are multiple reinforcing ribs, which are spaced apart along the edge line extension direction of the easily deformable injection molded part.

[0017] In this solution, by setting multiple reinforcing ribs, when the mating part and the deformable injection molded part are snapped together and fixed, the multiple reinforcing ribs extend along the edge line of the deformable injection molded part to position and fix the mating part, making the force on the mating part more uniform and the fixing and limiting effect better.

[0018] Preferably, as an improvement, the guide portion includes a guide ramp integrally formed on the reinforcing rib.

[0019] In this design, the guide ramp is used to guide the end of the mating parts. The guide ramp has a simple structure and can be integrally formed with the reinforcing rib, making the forming process very convenient.

[0020] Preferably, as an improvement, the width of the snap-fit ​​groove is in the range of 2 to 3 mm, and the length of the reinforcing part protruding from the side wall of the snap-fit ​​groove is less than or equal to the width of the snap-fit ​​groove.

[0021] In this design, the width of the snap-fit ​​groove is set to 2-3 mm, and correspondingly, the width of the protrusion on the mating part is also 2-3 mm, so that the protrusion and the snap-fit ​​groove can be stably snapped together, and the mating part can be firmly connected to the easily deformable injection molded part. At the same time, the length of the reinforcing part protruding from the side wall of the snap-fit ​​groove is less than or equal to the width of the snap-fit ​​groove, so as to prevent the end of the reinforcing part from protruding beyond the end of the easily deformable injection molded part, and to prevent the end of the reinforcing part from being damaged by collision when the easily deformable injection molded part is transported and transferred.

[0022] Preferably, as an improvement, the thickness of the reinforcing part is in the range of 0.5 to 1.2 mm.

[0023] In this design, the thickness of the reinforcing part is set to 0.5–1.2 mm, which effectively enhances the structural strength of the easily deformable injection molded part. At the same time, it avoids excessive thickness of the reinforcing part, which would result in excessive amount of injection material at the location of the reinforcing part, causing a large difference in the amount of injection material between the reinforcing part and the surrounding shell during injection molding, thus aggravating the local deformation of the easily deformable injection molded part. This effectively ensures the injection molding quality of the easily deformable injection molded part.

[0024] Preferably, as an improvement, the sidewall of the snap-fit ​​groove is provided with a plurality of positioning protrusions, which are spaced apart along the length of the sidewall of the snap-fit ​​groove.

[0025] In this solution, multiple positioning protrusions are set on the side wall of the snap-fit ​​groove. When the mating part and the deformable injection molded part are snapped together, the protruding end on the mating part abuts against the positioning protrusion, avoiding large-area contact between the end of the positioning protrusion and the inner wall of the snap-fit ​​groove. This makes it easier to control the accuracy of the snap-fit ​​between the protrusion and the snap-fit ​​groove. Furthermore, by reducing the contact area between the protrusion and the inner wall of the snap-fit ​​groove, when the deformable injection molded part and the mating part experience slight relative displacement during subsequent use, friction noise can be effectively reduced, thus improving the comfort of product use.

[0026] Preferably, as an improvement, the length of the positioning protrusion protruding from the side wall of the snap-fit ​​groove is 0.2 to 0.5 mm.

[0027] In this design, the length of the positioning protrusion protruding from the side wall of the locking groove is 0.2 to 0.5 mm. This avoids the positioning protrusion being too long, which would result in an excessively large seam after the mating part and the easily deformable injection molded part are locked together. This effectively ensures the appearance quality after the mating part and the easily deformable injection molded part are fixed together. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the connection between the variable injection molded part and the mating part in Embodiment 1 of this utility model.

[0029] Figure 2 This is an exploded view of the connection between the easily deformable injection molded part and the mating part in Embodiment 1 of this utility model.

[0030] Figure 3 This is a schematic diagram of the easily deformable injection molded part in Embodiment 1 of this utility model.

[0031] Figure 4 This is a partial schematic diagram of reinforcing ribs provided on a variable injection molded part in Embodiment 1 of this utility model.

[0032] Figure 5 This is a partial schematic diagram of reinforcing ribs provided on the easily deformable injection molded part in Embodiment 2 of this utility model. Detailed Implementation

[0033] The following detailed description illustrates the specific implementation method:

[0034] The reference numerals in the accompanying drawings include: 1. Flexible injection molded part, 101. Snap-fit ​​ear, 102. Snap-fit ​​groove, 1021. Side wall, 1022. Bottom wall, 2. Butt joint, 201. Snap-fit ​​seat, 202. Reinforcing rib, 3. Guide slope, 301. Positioning protrusion, 4.

[0035] Example 1

[0036] This embodiment is as shown in the attached figure. Figure 1 As shown: A reinforced positioning structure for a deformable injection-molded assembly includes a deformable injection-molded part 1 and a mating part 2 connected to each other. The deformable injection-molded part 1 is a shell-shaped part with a large surface area and small thickness. Figure 2 To achieve a snap-fit ​​connection between the variable injection molded part 1 and the mating part 2, on the one hand, a retainer 201 is integrally injection molded on the mating part 2, with a retaining hole on the retainer 201. The variable injection molded part 1 is integrally molded with a retaining lug 101 that mates with the retaining hole. The snap-fit ​​between the retaining hole and the retaining lug 101 secures the variable injection molded part 1 to the mating part 2. On the other hand, combined with… Figure 3 The B-side of the variable injection molded part 1 is provided with a snap-fit ​​groove 102 along the edge line of the variable injection molded part 1, which engages with the docking part 2. The docking part 2 is integrally formed with a protrusion 202 that engages with the snap-fit ​​groove 102. When the variable injection molded part 1 is connected to the docking part 2, the end of the protrusion 202 abuts against the side wall 1021 of the snap-fit ​​groove 102, and the side wall 1021 of the protrusion 202 fits against the bottom wall 1022 of the snap-fit ​​groove 102. Under the snap-fit ​​limiting effect of the bottom wall 1022 of the snap-fit ​​groove 102 on the side wall 1021 of the protrusion 202, the docking part 2 can be prevented from moving out of the A-side of the variable injection molded part 1, thus realizing the snap-fit ​​between the variable injection molded part 1 and the docking part 2.

[0037] Combination Figure 3 and Figure 4A reinforcing part is fixedly connected to the B side of the variable injection molded part 1. One end of the reinforcing part protrudes from the side wall 1021 of the snap-fit ​​groove 102. The end of the reinforcing part protruding from the side wall 1021 of the snap-fit ​​groove 102 and the snap-fit ​​groove 102 form a limiting space for limiting and fixing the docking part 2, and the limiting space is used to limit and position the protrusion 4. Specifically, the reinforcing part includes a reinforcing rib 3 integrally formed on the B side of the variable injection molded part 1. The reinforcing rib 3 forms an angle with the edge line of the variable injection molded part 1, and the height of the reinforcing rib 3 protruding from the B side of the variable injection molded part 1 gradually decreases from the end of the reinforcing rib 3 near the snap-fit ​​groove 102 to the other end, so that the end of the reinforcing rib 3 near the snap-fit ​​groove 102 is larger, and the reinforcing rib 3 can play a better limiting and fixing role for the protrusion 202. Meanwhile, in order to facilitate the protrusion 202 to be snapped into the limiting space, in this embodiment, a guide part that cooperates with the docking part 2 is provided on the side of the reinforcing rib 3 facing the snap-fit ​​groove 102. The guide part is integrally formed on the guide slope 301 on the reinforcing rib 3.

[0038] In this embodiment, the thickness T of the reinforcing rib 3 ranges from 0.5 to 1.2 mm, preferably 0.8 mm, the width D of the snap-fit ​​groove 102 ranges from 2 to 3 mm, preferably 2.5 mm, the length of the reinforcing rib 3 protruding from the side wall 1021 of the snap-fit ​​groove 102 is less than L and equal to the width of the snap-fit ​​groove 102, preferably 2 mm, and in this embodiment, the number of reinforcing ribs 3 is set to multiple, and the multiple reinforcing ribs 3 are spaced apart along the edge line extension direction of the easily deformable injection molded part 1.

[0039] The specific implementation process is as follows:

[0040] In this embodiment, when installing and fixing the deformable injection molded part 1 and the mating part 2, the snap-fit ​​ear 101 is inserted into the snap-fit ​​hole, and then the protrusion is inserted into the snap-fit ​​groove 102. The end of the protrusion 202 abuts against the side wall 1021 of the snap-fit ​​groove 102, and the side of the protrusion 202 contacts the bottom wall 1022 of the snap-fit ​​groove 102. In this embodiment, since a reinforcing rib 3 is formed on the B side of the deformable injection molded part, the reinforcing rib 3 effectively improves the structural strength of the deformable injection molded part 1 and reduces the deformation of the deformable injection molded part 1 during the injection molding stage. The larger deformation improves the molding quality of the easily deformable injection molded part 1. At the same time, the reinforcing rib 3 improves the structural strength of the easily deformable injection molded part 1. When the easily deformable injection molded part 1 is snapped and fixed with the mating part 2, it can effectively reduce the deformation or even damage of the easily deformable injection molded part 1. Moreover, under the limiting and clamping effect of the end of the reinforcing rib 3 on the protrusion 202, the connection between the easily deformable injection molded part 1 and the mating part 2 is more precise, reducing the surface difference after the A surface of the mating part 2 and the A surface of the easily deformable injection molded part 1 are assembled, thus improving the appearance quality of the product.

[0041] Example 2

[0042] The difference between Example 2 and Example 1 is as follows: Figure 5As shown, in this embodiment, multiple positioning protrusions 4 are integrally formed on the side wall 1021 of the snap-fit ​​groove 102. The multiple positioning protrusions 4 are spaced apart along the length direction of the side wall 1021 of the snap-fit ​​groove 102, and the length of the positioning protrusions 4 protruding from the side wall 1021 of the snap-fit ​​groove 102 is 0.2 to 0.5 mm, preferably 0.3 mm. In this embodiment, by setting the positioning protrusions 4 on the side wall 1021 of the snap-fit ​​groove 102, when the protrusion 202 of the mating part 2 is engaged with the side wall 1021 of the snap-fit ​​groove 102, the end of the protrusion 202 abuts against the positioning protrusion 4, which can effectively reduce the contact area between the protrusion 202 and the side wall 1021 of the snap-fit ​​groove 102, so that the connection accuracy between the protrusion 202 and the snap-fit ​​groove 102 can be better controlled. At the same time, it can reduce the risk of abnormal noise caused by relative displacement and friction after the volatile injection molded part 1 and the mating part 2 are connected.

[0043] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A reinforcing positioning structure for a flexible injection molded assembly comprising a flexible injection molded member and a counter member connected to one another, characterized in that: The B-side of the variable injection molded part is provided with a snap-fit ​​groove along the edge line of the variable injection molded part, which is engaged with the mating part. A reinforcing part is fixedly connected to the B-side of the variable injection molded part. One end of the reinforcing part protrudes from the side wall of the snap-fit ​​groove. The end of the reinforcing part protruding from the side wall of the snap-fit ​​groove and the snap-fit ​​groove form a limiting space for limiting and fixing the mating part.

2. A reinforcing positioning structure for a flexible injection molded assembly according to claim 1, characterized in that: The reinforcing part is provided with a guide part that mates with the mating part on the side facing the snap-fit ​​groove.

3. A reinforcing positioning structure for a deformable injection molded assembly according to claim 2, wherein: The reinforcing part includes reinforcing ribs integrally molded onto the deformable injection molded part.

4. A reinforcing positioning structure for a deformable injection molded assembly according to claim 3, wherein: The reinforcing rib forms an angle with the edge line of the volatile injection molded part, and the height of the reinforcing rib protruding from the B side of the volatile injection molded part gradually decreases from the end of the reinforcing rib closer to the snap-fit ​​groove to the other end.

5. A reinforcing positioning structure for a deformable injection molded assembly according to claim 3, wherein: The number of reinforcing ribs is multiple, and the multiple reinforcing ribs are spaced apart along the edge line extension direction of the easily deformable injection molded part.

6. A reinforcing positioning structure for a deformable injection molded assembly according to claim 3, wherein: The guide section includes a guide slope integrally formed on the reinforcing rib.

7. A reinforcing and positioning structure for a flexible injection molded assembly according to any one of claims 1-6, characterized in that: The width of the snap-fit ​​groove is 2 to 3 mm, and the length of the reinforcing part protruding from the side wall of the snap-fit ​​groove is less than or equal to the width of the snap-fit ​​groove.

8. The reinforced positioning structure for a easily deformable injection molded assembly according to claim 7, characterized in that: The thickness of the reinforcing part ranges from 0.5 to 1.2 mm.

9. A reinforcing positioning structure for a deformable injection molded assembly according to claim 7, wherein: The sidewall of the snap-fit ​​groove is provided with multiple positioning protrusions, which are spaced apart along the length of the sidewall of the snap-fit ​​groove.

10. A reinforcing positioning structure for a deformable injection molded assembly according to claim 9, wherein: The length of the positioning protrusion protruding from the side wall of the snap-fit ​​groove is 0.2 to 0.5 mm.

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