A waterproof lens with multi-lens architecture
By using a multi-lens architecture and waterproof rubber ring in the inclined chamfered position of the internal component design in the vehicle lens, the problem of unstable compression ratio of the waterproof rubber ring caused by the increase in the number of lenses is solved, and stable waterproof performance is achieved.
Patent Information
- Application Number
- CN202421227544.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-05-31
AI Technical Summary
In vehicle-mounted lenses, due to the increase in the number of lenses, the compression ratio of the waterproof rubber ring is unstable, which increases the risk of waterproof failure.
A waterproof lens design adopts a multi-lens architecture, where the waterproof rubber ring is placed in the oblique chamfered position of the internal parts design or the oblique chamfered position of the lens barrel design, and the waterproof rubber ring is deformed by the No. 1 sheet pressing to achieve the waterproof function of the lens.
By placing the waterproof rubber ring in an oblique chamfered position, the deformation height changes synchronously with the internal parts, the pressure adhesion of the waterproof rubber ring is stable and not affected by the tolerance of the internal parts, effectively avoiding the risk of waterproof failure.
Smart Images
Figure CN222704790U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of optical lenses, in particular to a waterproof lens with a multi-lens structure. Background Art
[0002] With the rapid development of advanced driver assistance system technology, vehicles will gradually achieve automated driving and eventually achieve the goal of unmanned driving. The performance requirements of vehicle lenses are also getting higher and higher. As an important part of vision, the optical structure of 8M / 17M lenses is becoming more and more complex. Multiple lenses are required to meet the optical performance requirements. The lenses are assembled outside the car compartment, which often requires very high waterproof performance. The increase in the number of lenses inside the lens leads to a very large internal mechanical cumulative tolerance of the entire lens, causing the compression ratio of the waterproof rubber ring inside the lens to not tend to a stable value, and the risk of waterproof failure is very high.
[0003] This waterproof lens structure is different from the traditional lens waterproof structure design. When designing the waterproof structure, it effectively avoids the impact of process tolerance on assembly during lens processing, and effectively reduces the performance impact of the waterproof rubber ring during the high temperature resistance test of the lens. Utility Model Content
[0004] The purpose of the utility model is to provide a waterproof lens with a multi-lens structure to solve the problem mentioned in the above background technology that the increase in the number of lenses inside the vehicle-mounted lens leads to a very large internal mechanical cumulative tolerance of the entire lens, resulting in the compression ratio of the waterproof rubber ring inside the lens not tending to a stable value, and the risk of waterproof failure is very high.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a waterproof lens with a multi-lens structure, comprising a lens barrel and a lens group arranged in the lens barrel, the lens barrel having a light inlet, a light outlet, an assembly space connecting the light inlet and the light outlet, and at least one external fitting; a boss structure is provided at one end of the lens barrel close to the image side, a first lens and a second lens are arranged in sequence in the boss structure, an annular cavity with a wedge-shaped cross section is formed between the first lens, the second lens and the inner wall of the boss structure of the lens barrel, a waterproof rubber ring is provided in the annular cavity, and the external fitting clamps the first lens in the boss structure.
[0006] Preferably, the lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens arranged in sequence from the image side to the object side, and adjacent lenses are isolated from each other by isolation rubber rings.
[0007] Preferably, the lens barrel includes a second barrel, a first barrel and a boss structure which are arranged in sequence from the object side to the image side, the second lens is arranged at the connection between the first barrel and the boss structure, and the sixth lens is arranged at the connection between the second barrel and the first barrel.
[0008] Preferably, a filter is further provided below the eighth lens near the object side, and the filter is fixed to one end of the lens barrel near the object side.
[0009] Preferably, the first lens and the inner wall of the boss structure are in interference fit, the outer diameter of the second lens is smaller than the outer diameter of the first lens, and the top of the boss structure is inclined, so that an annular cavity with a wedge-shaped cross-section is formed between the first lens, the second lens and the inner wall of the boss structure.
[0010] Preferably, there is an interference fit between the first lens and the inner wall of the boss structure, the outer diameter of the second lens is smaller than the outer diameter of the first lens, and an isolation rubber ring is included. The isolation rubber ring has a "Z"-shaped structure, with its top end abutting against the lower surface of the first lens and its bottom end abutting against the lower structure of the second lens. At the same time, the bottom of the isolation rubber ring is clamped between the second lens and the inner wall of the boss structure, and the outer side of the top end is inclined, and the middle part is close to the inner wall of the boss structure, so as to form the annular cavity with a wedge-shaped cross section between the isolation rubber ring, the first lens and the inner wall of the boss structure.
[0011] Compared with the prior art, the beneficial effects of the utility model are:
[0012] The waterproof lens structure of this scheme abandons the method of having the waterproof platform of the original lens barrel support the waterproof rubber ring. Instead, a waterproof rubber ring is placed at the chamfered position of the internal component design or the chamfered position of the lens barrel design, and then a No. 1 sheet is used to press the waterproof rubber ring to deform, thereby achieving the waterproof function of the lens. The deformation height of the waterproof rubber ring of this scheme changes synchronously with the internal components. The pressure amount of the waterproof rubber ring is stable and is not affected by the tolerance of internal components, which effectively avoids the risk of waterproof failure caused by the cumulative tolerance of multiple components of high-end lenses. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the structure of a waterproof lens in the prior art;
[0014] Figure 2 It is an enlarged schematic diagram of the structure of the first waterproof lens at position A in the prior art;
[0015] Figure 3 It is an enlarged schematic diagram of the structure of the second waterproof lens at position A in the prior art;
[0016] Figure 4It is an enlarged schematic diagram of the structure at point A of a multi-lens architecture of Example 1;
[0017] Figure 5 This is an enlarged schematic diagram of the structure at point A of a multi-lens architecture of Example 2.
[0018] In the figure: 11, boss structure; 12, first cylinder; 13, second cylinder; 21, first lens; 22, second lens; 23, third lens; 24, fourth lens; 25, fifth lens; 26, sixth lens; 27, seventh lens; 28, eighth lens; 3, isolation rubber ring; 4, filter; 5, waterproof rubber ring. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0020] See also Figure 1 The schematic diagram of the first conventional waterproof lens structure of the prior art is as follows: it includes a lens barrel and a lens group arranged in the lens barrel, the lens barrel has a light inlet, a light outlet, an assembly space connecting the light inlet and the light outlet, and at least one external accessory; a boss structure is provided at one end of the lens barrel close to the image side, a first lens and a second lens are arranged in sequence in the boss structure, and a waterproof rubber ring is arranged in the annular cavity. The existing waterproof lens structure adopts that the waterproof rubber ring is placed on the waterproof platform of the lens barrel and the waterproof rubber ring is deformed by pressing the first sheet, and the specific structure is shown in FIG. Figure 2 and Figure 3 As shown, since the lens adopts stacked assembly, the optical structure of the high-order pixel lens is complex and has a large number of internal lenses and gaskets, resulting in large fluctuations in the cumulative tolerance of internal components and the IP69 waterproof performance is often not met.
[0021] In this application, the applicant has improved the structure at A: the method of having the waterproof platform of the original lens barrel support the waterproof rubber ring was abandoned, and a waterproof rubber ring was placed at the chamfered position of the internal component design or the chamfered position of the lens barrel design, and then a No. 1 sheet was used to press the waterproof rubber ring to deform, so as to achieve the waterproof function of the lens. In this scheme, the deformation height of the waterproof rubber ring changes synchronously with the internal components, and the pressing amount of the waterproof rubber ring is stable and is not affected by the tolerance of the internal components, which effectively avoids the risk of waterproof failure caused by the cumulative tolerance of multiple components of high-end lenses.
[0022] Example 1.
[0023] See also Figure 3 The first lens and the inner wall of the boss structure are interference fit, the outer diameter of the second lens is smaller than the outer diameter of the first lens, and the top of the boss structure is inclined, so that the cross-section formed between the first lens, the second lens and the inner wall of the boss structure is a wedge-shaped annular cavity.
[0024] Example 2.
[0025] Compared with Example 1 and the prior art, the only difference is that the structure at A is different, please refer to Figure 4 The first lens and the inner wall of the boss structure are interference fit, the outer diameter of the second lens is smaller than the outer diameter of the first lens, and an isolation rubber ring is included. The isolation rubber ring has a "Z"-shaped structure, the top end of which abuts against the lower surface of the first lens, and the bottom end abuts against the lower structure of the second lens. At the same time, the bottom of the isolation rubber ring is clamped between the second lens and the inner wall of the boss structure, and the outer side of the top end is inclined, and the middle part is close to the inner wall of the boss structure, so as to form the annular cavity with a wedge-shaped cross section between the isolation rubber ring, the first lens and the inner wall of the boss structure.
[0026] Through the above two embodiments, it can be known that the existing waterproof lens structure adopts a waterproof rubber ring placed on the waterproof platform of the lens barrel, and the waterproof rubber ring is deformed by pressing the No. 1 sheet to achieve the waterproof function. However, since the lens adopts a stacked assembly, the optical structure of the high-order pixel lens is complex and the number of internal lenses and gaskets is large, resulting in a large fluctuation in the cumulative tolerance of the internal components, and the IP69 waterproof performance is often not met.
[0027] The waterproof lens structure of this scheme abandons the method of having the waterproof platform of the original lens barrel support the waterproof rubber ring. Instead, a waterproof rubber ring is placed at the chamfered position of the internal component design or the chamfered position of the lens barrel design, and then a No. 1 sheet is used to press the waterproof rubber ring to deform, thereby achieving the waterproof function of the lens. The deformation height of the waterproof rubber ring of this scheme changes synchronously with the internal components. The pressing amount of the waterproof rubber ring is stable and is not affected by the tolerance of the internal components, which effectively avoids the risk of waterproof failure caused by the cumulative tolerance of multiple components of high-end lenses.
[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A waterproof lens with a multi-lens structure, characterized in that: The invention comprises a lens barrel and a lens group arranged in the lens barrel, wherein the lens barrel has a light inlet, a light outlet, an assembly space connecting the light inlet and the light outlet, and at least one external accessory; a boss structure (11) is provided at one end of the lens barrel close to the image side, a first lens (21) and a second lens (22) are arranged in sequence in the boss structure (11), an annular cavity with a wedge-shaped cross section is formed between the first lens (21), the second lens (22) and the inner wall of the boss structure (11) of the lens barrel, a waterproof rubber ring (5) is arranged in the annular cavity, and the external accessory (6) clamps the first lens (21) in the boss structure (11).
2. The waterproof lens with a multi-lens structure according to claim 1, characterized in that: The lens group comprises a first lens (21), a second lens (22), a third lens (23), a fourth lens (24), a fifth lens (25), a sixth lens (26), a seventh lens (27) and an eighth lens (28) which are arranged in sequence from the image side to the object side, and adjacent lenses are isolated from each other by isolation rubber rings (3).
3. The waterproof lens with a multi-lens structure according to claim 2, characterized in that: The lens barrel comprises a second barrel (13), a first barrel (12) and a boss structure (11) which are arranged in sequence from the object side to the image side; the second lens (22) is arranged at the connection between the first barrel (12) and the boss structure (11); and the sixth lens (26) is arranged at the connection between the second barrel (13) and the first barrel (12).
4. The waterproof lens with a multi-lens structure according to claim 2, characterized in that: A filter (4) is also provided below the eighth lens (28) near the object side, and the filter (4) is fixed to one end of the lens barrel near the object side.
5. The waterproof lens with a multi-lens structure according to claim 1, characterized in that: The first lens (21) and the inner wall of the boss structure (11) are in interference fit, the outer diameter of the second lens (22) is smaller than the outer diameter of the first lens (21), and the top of the boss structure (11) is arranged at an angle, so that an annular cavity with a wedge-shaped cross section is formed between the first lens (21), the second lens (22) and the inner wall of the boss structure (11).
6. The waterproof lens with a multi-lens structure according to claim 1, characterized in that: The first lens (21) and the inner wall of the boss structure (11) are in interference fit, the outer diameter of the second lens (22) is smaller than the outer diameter of the first lens (21), and the second lens (22) further comprises an isolating rubber ring (3). The isolating rubber ring (3) is in a "Z"-shaped structure, the top end of which abuts against the lower surface of the first lens (21), and the bottom end abuts against the lower structure of the second lens (22). At the same time, the bottom of the isolating rubber ring (3) is clamped between the second lens (22) and the inner wall of the boss structure (11), and the outer side of the top end is inclined, and the middle part is in close contact with the inner wall of the boss structure (11), so that the annular cavity with a wedge-shaped cross section is formed between the isolating rubber ring (3), the first lens (21) and the inner wall of the boss structure (11).