Shell structure
By designing brackets and seals that match the arc-shaped part and the arc-shaped surface, and combining HAF film and mounting groove limiting structure, the problem of uneven assembly of multi-dimensional curved shells was solved, and a shell connection with high sealing performance and high strength was achieved.
Patent Information
- Application Number
- CN202522754681.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-25
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-12-25
AI Technical Summary
The multi-dimensional curved surface design of the housing is difficult to align during assembly, resulting in uneven gaps on the curved surface and affecting the sealing performance.
Design a shell structure that uses a bracket and seals that match the arc-shaped part and the arc-shaped surface. The arc length of the arc part is less than or equal to the minimum radius of curvature of the arc-shaped surface. It is sealed with HAF film and combined with mounting groove and limiting structure for precise positioning and fixation.
It achieves high sealing performance and high-strength connection of the housing, reduces assembly gaps, and improves sealing effect and installation accuracy.
Smart Images
Figure CN224947838U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of shell technology, and in particular to a shell structure. Background Technology
[0002] In the 3C consumer electronics field, multi-dimensional curved surface designs are becoming increasingly popular to ensure the appearance of the casing. However, the curved surfaces of multi-dimensional curved surface designs are difficult to align during assembly, which can easily lead to uneven gaps when the curved surfaces are fitted together. This makes it difficult to seal the curved surfaces and greatly reduces the sealing performance of the casing. Utility Model Content
[0003] The purpose of this application is to solve the above-mentioned problems by designing a shell structure.
[0004] The technical solution of this application to achieve the above objectives is a shell structure, comprising: The main body of the shell has an arc-shaped inner wall; The bracket and the seal are provided. The bracket has an arcuate portion that matches the arcuate surface. The arcuate surface and the arcuate portion are fitted together. The seal is disposed between the arcuate portion and the arcuate surface. The arc length of the arcuate portion is less than or equal to the minimum radius of curvature of the arcuate surface.
[0005] As a further description of this technical solution, the sealing element is a HAF film.
[0006] As a further description of this technical solution, the inner wall of the housing body is provided with a mounting groove, and an arc-shaped surface is formed in the mounting groove, and part of the bracket is installed in the mounting groove.
[0007] As a further description of this technical solution, a support portion is provided on the inner bottom wall of the housing body, and a portion of the bracket is abutted between the mounting groove and the support portion.
[0008] As a further description of this technical solution, the bracket includes a mounting part that mates with the mounting groove and a snap-fit part disposed on one side of the mounting part; The inner wall of the main body of the shell is also provided with a limiting groove. The limiting groove is located between the mounting groove and the support part, and the locking part is locked in the limiting groove.
[0009] As a further description of this technical solution, the mounting groove includes a support step and two side limiting baffles. The two side limiting baffles are respectively disposed at both ends of the support step. The support step is used to support the mounting bracket, and at least a portion of the bracket is abutted between the two side limiting baffles.
[0010] As a further description of this technical solution, the mounting groove also includes an upper limit stop, which is disposed opposite to and spaced apart from the support step, and at least a portion of the bracket is abutted between the upper limit stop and the support step.
[0011] As a further description of this technical solution, the mounting groove is provided with multiple acoustic channels that penetrate the main body of the housing.
[0012] As a further description of this technical solution, the seal is provided with multiple clearance holes, and each clearance hole corresponds to a multiple acoustic channel.
[0013] As a further description of this technical solution, the inner wall of the shell body is also provided with multiple reinforcing ribs.
[0014] Its beneficial effect is that, based on the maximum assembly offset calculated from the forming tolerance of the bracket and the main body of the housing, by adjusting the arc length of the arc part of the bracket and the minimum radius of curvature of the arc surface of the main body of the housing, the arc length of the arc part is less than or equal to the minimum radius of curvature of the arc surface. When the bracket and the main body of the housing are fitted together, the gap generated when the bracket and the main body of the housing are fitted together is within the theoretical range. Thus, when the sealing element is set between the arc part and the arc surface, the housing can obtain a better sealing effect. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a schematic diagram of the installation structure of the seal in this application; Figure 3 This is a schematic diagram of the acoustic channel structure of this application; Figure 4 This is a simplified schematic diagram of the arc-shaped portion and arc-shaped surface of this application; Figure 5 This is a schematic diagram of the connection structure between the bracket and the main body of the housing in this application.
[0016] In the figure, 1 is the main body of the shell; 2 is the mounting groove; 3 is the bracket; 4 is the seal; 5 is the acoustic channel; 7 is the clearance hole; 8 is the reinforcing rib; 9 is the support part; 21 is the support step; 22 is the side limit baffle; 23 is the upper limit block; 31 is the mounting part; 32 is the snap-fit part; and 33 is the limit slot. Detailed Implementation
[0017] In the 3C consumer electronics field, multi-dimensional curved surface designs are becoming increasingly popular to ensure the appearance of the casing. However, the curved surfaces of multi-dimensional curved surface designs are difficult to align during assembly, which can easily lead to uneven gaps when the curved surfaces are fitted together. This makes it difficult to seal the curved surfaces and greatly reduces the sealing performance of the casing.
[0018] The present application will now be described in detail with reference to the accompanying drawings, such as... Figures 1-5 As shown, a shell structure includes: The shell body 1 has an arc-shaped surface on its inner wall, and the bracket 3 has an arc-shaped part that matches the arc-shaped surface. It can be understood that the arc-shaped surface and the arc-shaped part have the same shape and size.
[0019] When the arc-shaped part and the arc-shaped surface are fitted together, in order to ensure the sealing of the connection between the housing body 1 and the bracket 3, a sealing element 4 is provided between the arc-shaped part and the arc-shaped surface.
[0020] It should be noted that the larger the radius of curvature of the curved surface, the closer the curved surface is to a plane. Therefore, the easier it is for the curved surface to fit with the curved part. When the radius of curvature of the curved part and the curved surface are the same, the shorter the arc length of the curved part, the easier it is for the curved part to fit with the curved surface.
[0021] Based on the above, in order to ensure the sealing performance at the connection between the bracket 3 and the housing body 1, it is necessary to set the arc length of the arc part and the minimum radius of curvature of the arc surface according to the actual situation. First, the maximum assembly offset is calculated based on the forming tolerance of the bracket 3 and the housing body 1. For example, if the CPK size is greater than or equal to 1.33, the standard dimensional tolerance c that the bracket 3 can usually achieve is ±0.05mm, and the single-sided assembly gap d between the bracket 3 and the housing body 1 is usually 0.1mm. Therefore, the maximum assembly offset a between the bracket 3 and the housing body 1 is 0.15mm (that is, the case where the bracket 3 is installed into the housing body 1 and completely offset to one side).
[0022] In some embodiments, to enable those skilled in the art to better understand this solution, such as Figure 4 As shown, the arc-shaped part and arc-shaped surface are simplified into two identical circular arcs. The horizontal offset of the center of the two circular arcs is 'a', which is the maximum offset of the assembly between the bracket 3 and the housing body 1. Based on the maximum offset, the minimum radius of curvature of the arc-shaped surface can be adjusted to 36.7 mm, meaning the radius of the two circular arcs is 36.7 mm. The maximum gap 'b' generated at the ±α (30°) angle between the two circular arcs (i.e., the arc length is equal to 1 / 6 of the arc circumference) is 0.07 mm. Typically, the unevenness of the gap generated by the conventional curved surface housing fit in the industry is greater than 0.1 mm. Therefore, setting the arc length of the arc-shaped part of the bracket 3 to be less than or equal to 1 / 6 of the corresponding simplified arc circumference ensures that the gap generated when the bracket 3 and the housing body 1 are fitted together is within the theoretical range (i.e., less than or equal to 0.1 mm). Thus, the fitting gap between the bracket 3 and the housing body 1 is smaller. When the sealing element 4 is installed between the arc-shaped part and the arc-shaped surface, the housing can achieve a better sealing effect.
[0023] In some embodiments, the seal 4 is a HAF film. The advantages of HAF film are that it maintains excellent and stable adhesion even in extremely narrow bonding areas. Secondly, HAF film is non-adhesive at room temperature, so its adhesiveness is not affected even if it is rubbed during assembly.
[0024] Furthermore, as mentioned above, the maximum gap between the bracket 3 and the housing body 1 during assembly is 0.07 mm. In this application, as... Figure 5 As shown, the bracket 3 and the housing body 1 are connected by a HAF film with a thickness of e (0.2 mm). Under specific pressure (5-10 bar) and temperature conditions (greater than 75°C), the HAF film is activated by heating and pressurizing for a certain period of time (120 s). The HAF film softens into a semi-liquid state through a cross-linking reaction from a solid sheet. Under pressure, it fills the gap and becomes sticky, thus achieving a sealing effect. At the same time, the thickness of the HAF film after activation and compression is f (0.1 mm). Compared with the maximum gap between the bracket 3 and the housing body 1, the HAF film compressed to a thickness of 0.1 mm is sufficient to fill the gap between the bracket 3 and the housing body 1.
[0025] It should be noted that the HAF film not only ensures good sealing at the connection between the bracket 3 and the housing body 1, but also guarantees a high-strength connection between the bracket 3 and the housing body 1. Test results show that when the sealing test pressure is 5 kPa, the gas leakage value between the bracket 3 and the housing body 1 is <3 Pa, and the destructive push-out force between the bracket 3 and the housing body 1 is >5 MPa.
[0026] In some embodiments, such as Figure 1 and Figure 2 As shown, an installation groove 2 is provided on the inner side wall of the housing body 1, and an arc-shaped surface is formed in the installation groove 2. Part of the bracket 3 is installed in the installation groove 2.
[0027] The mounting groove 2 will be described in detail below. The mounting groove 2 includes a support step 21 and two side limiting baffles 22. The two side limiting baffles 22 are respectively disposed at both ends of the support step 21. The support step 21 is used to support the mounting bracket 3, and at least part of the bracket 3 is abutted between the two side limiting baffles 22.
[0028] The mounting slot 2 also includes an upper limit stop 23, which facilitates auxiliary positioning of the bracket. The upper limit stop 23 is positioned opposite to and spaced apart from the support step 21, and at least a portion of the bracket 3 is abutted between the upper limit stop 23 and the support step 21.
[0029] This configuration allows for the positioning and fixing of the bracket 3 via the mounting groove 2, which improves installation accuracy, further reduces the fitting gap, and ultimately enhances the sealing performance of the housing.
[0030] In some embodiments, such as Figure 2 and Figure 3 As shown, the mounting groove 2 is provided with multiple acoustic channels 5 penetrating the main body 1 of the housing, and the sealing element 4 is provided with multiple clearance holes 7, each corresponding to one of the multiple acoustic channels 5. Specifically, the main body 1 of the housing emits sound outward through the multiple acoustic channels 5. The sealing element 4 is provided with multiple clearance holes 7. When the sealing element 4 is sealed between the arc-shaped part of the bracket 3 and the arc-shaped surface inside the mounting groove 2, the multiple clearance holes 7 correspond one-to-one with the multiple acoustic channels 5. This arrangement can prevent the sealing element 4 from blocking the sound emission channels, and at the same time, it can also prevent sound leakage, so that the sound is emitted from the acoustic channels 5 as much as possible.
[0031] In some embodiments, such as Figure 2 As shown, the bracket 3 includes a mounting part 31 that mates with the mounting groove 2 and a snap-fit part 32 located on one side of the mounting part 31.
[0032] The inner wall of the housing body 1 is also provided with a limiting groove 33, which is located between the mounting groove 2 and the support part 9. The snap-fit part 32 snaps into the limiting groove 33. This arrangement realizes the snap-fit assembly of the bracket 3 and the housing body 1, and the assembly method is simple and reliable.
[0033] In some embodiments, to facilitate the internal connection support of the housing body 1, a support portion 9 is provided on the inner bottom wall of the housing body 1, and a portion of the bracket 3 is abutted between the mounting groove 2 and the support portion 9. This arrangement not only improves the installation stability of the bracket 3, but also enhances the strength of the housing body 1.
[0034] In some embodiments, in order to ensure the strength of the housing body 1, a plurality of reinforcing ribs 8 are provided on the inner wall of the housing body 1. Specifically, the reinforcing ribs can be arranged horizontally or vertically, and the number of reinforcing ribs can be 2, 3, 4, or 5, without any specific limitation.
[0035] The above technical solutions only embody the preferred technical solutions of this application. Any modifications that may be made by those skilled in the art to certain parts of these solutions embody the principles of this application and fall within the protection scope of this application.
Claims
1. A shell structure, characterized in that, include: The housing body has an arc-shaped inner wall; A bracket and a seal, the bracket having an arcuate portion that matches the arcuate surface, the arcuate surface being fitted to the arcuate portion, and the seal being sealed between the arcuate portion and the arcuate surface, wherein the arc length of the arcuate portion is less than or equal to the minimum radius of curvature of the arcuate surface.
2. The shell structure according to claim 1, characterized in that, The sealing element is a HAF film.
3. The shell structure according to claim 1 or 2, characterized in that, The inner wall of the housing body is provided with a mounting groove, and the arc-shaped surface is formed in the mounting groove. Part of the bracket is installed in the mounting groove.
4. The shell structure according to claim 3, characterized in that, The inner bottom wall of the housing body is provided with a support portion, and part of the bracket is abutted between the mounting groove and the support portion.
5. The shell structure according to claim 4, characterized in that, The bracket includes a mounting part that mates with the mounting groove and a snap-fit part disposed on one side of the mounting part; The inner wall of the housing body is also provided with a limiting groove, which is located between the mounting groove and the support part, and the locking part is locked in the limiting groove.
6. The shell structure according to claim 3, characterized in that, The mounting groove includes a support step and two side limiting baffles. The two side limiting baffles are respectively disposed at both ends of the support step. The support step is used to support the mounting bracket, and at least a portion of the bracket is abutted between the two side limiting baffles.
7. The shell structure according to claim 6, characterized in that, The mounting groove also includes an upper limit stop block, which is disposed opposite to and spaced apart from the support step, and at least a portion of the bracket is abutted between the upper limit stop block and the support step.
8. The shell structure according to claim 3, characterized in that, The mounting groove is provided with multiple acoustic channels that penetrate the main body of the housing.
9. The shell structure according to claim 8, characterized in that, The sealing element is provided with multiple clearance holes, and each of the multiple clearance holes corresponds to a multiple of the acoustic channels.
10. The shell structure according to claim 1, characterized in that, The inner wall of the main body of the shell is also provided with multiple reinforcing ribs.