Skylight drain pipe
The split-type design of the sunroof drain pipe solves the problems of replacement and wear in existing technologies, achieving convenient disassembly and stable drainage, and extending its service life.
Patent Information
- Application Number
- CN202520456188.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-13
AI Technical Summary
Existing automotive drainage pipes have an integrated structure, which means that replacing them when they age or become clogged requires a lot of time and effort. They are also prone to wear and tear during driving, affecting drainage performance and the humidity inside the vehicle.
It adopts a split design, including a connector, drain pipe, tail plug and fastener. The connector can be replaced separately. The lower end of the drain pipe has a compensating joint to absorb vibration. The tail plug is fixed to the frame. The fastener limits and fixes the components to the frame.
It enables individual replacement of aging connectors, simplifies disassembly and cleaning, prevents wear, extends service life, and ensures the stability and sealing of the drainage system.
Smart Images

Figure CN223934519U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive parts technology, and specifically to a sunroof drain pipe. Background Technology
[0002] With the improvement of modern living standards and the increasing variety of car features, sunroofs, as a feature that is both aesthetically pleasing and practical, are becoming more and more common in passenger cars and are favored by more and more consumers. To prevent water leakage from the sunroof, a sunroof drain pipe is usually installed. The sunroof drain pipe is generally arranged inside the interior panels of the A and C pillars, and then passes through the bottom of the vehicle frame to drain the water outside the car.
[0003] Existing automotive drain pipes typically use a one-piece structure. When the drain connectors age or become clogged, it takes a lot of time and effort to disassemble and clean them. There is a lack of fasteners between the bottom of the drain pipe and the vehicle frame, making it easier for the drain pipe and the vehicle frame to collide and wear during driving, resulting in poor drainage or water entering the vehicle frame during drainage. Utility Model Content
[0004] This utility model provides a skylight drainage pipe to solve the problems of the prior art.
[0005] The objective of this utility model can be achieved through the following technical solution: a skylight drainage pipe, comprising:
[0006] The connector includes a first connector and a second connector. The first connector has a water receiving groove at its upper end and an external thread at its lower end. The second connector has an internal thread at one end and a snap-fit groove at the other end.
[0007] A drain pipe, wherein the upper end of the drain pipe is provided with a lip that connects to the end of the second connector and the lower end is provided with a corrugated compensating joint;
[0008] The tail plug includes a connecting section that connects to the drain pipe and an mounting section for fixing to the vehicle frame sheet metal, wherein the connecting section, the mounting section, and the drain pipe are arranged in a continuous manner.
[0009] In a further improvement, the drain pipe is fitted with several fasteners, including a limiting ring for limiting the drain pipe and a pin for fixing it to the frame.
[0010] In a further improvement, the limiting ring has an opening at one end, and arc-shaped guide surfaces are provided at both ends of the opening.
[0011] As a further improvement, the outer side of one section of the second connector is provided with anti-slip texture.
[0012] As a further improvement, a guide ramp is provided at the lower end of the mounting section.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] 1. The modular design of this utility model allows for the replacement of the aged first connector without replacing the entire drainage pipe system, saving costs and time;
[0015] 2. The modular structure of this utility model is easy to disassemble, allowing for easy cleaning of blockages and restoration of smooth drainage;
[0016] 3. The corrugated design at the lower end of the drainage pipe of this utility model provides energy-saving compensation by absorbing vibrations and thermal expansion during vehicle operation, preventing pipe damage and extending service life.
[0017] 4. The tail plug mounting section of this utility model is fixed to the sheet metal of the vehicle frame to ensure the stability of the drainage system during vehicle operation and prevent problems caused by displacement or loosening. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of this utility model;
[0019] Figure 2 This is a schematic diagram of the connector structure of this utility model;
[0020] Figure 3 This is a schematic diagram of the structure of the fastener of this utility model;
[0021] Figure 4 This is a cross-sectional view of the second connector of this utility model.
[0022] In the diagram, 1. Connector: 11. First connector; 111. Water inlet; 112. External thread; 12. Second connector; 121. Internal thread; 122. Snap-fit groove; 123. Anti-slip texture; 2. Drain pipe; 21. Lip; 22. Compensating joint; 3. Tail plug: 31. Connecting section; 32. Mounting section; 321. Guide slope; 4. Fixing component: 41. Limiting ring; 411. Opening; 412. Arc-shaped guide surface; 42. Insert pin. Detailed Implementation
[0023] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0025] The following is a description of the embodiments and appendices. Figures 1-4 The technical solution of this utility model will be further described below.
[0026] Example 1
[0027] A skylight drain pipe, comprising:
[0028] Connector 1, the connector 1 includes a first connector 11 and a second connector 12, the first connector 11 is provided with a water receiving groove 111 at the upper end and an external thread 112 at the lower end, the second connector 12 is provided with an internal thread 121 at one end and a snap-fit groove 122 at the other end;
[0029] Drain pipe 2, the upper end of which is provided with a lip 21 that connects to the end of the second connector 12 and the lower end is provided with a corrugated compensating joint 22;
[0030] Tail plug 3, the tail plug 3 includes a connecting section 31 connected to the drain pipe 2 and an mounting section 32 for fixing to the vehicle frame sheet metal, the connecting section 31, the mounting section 32 and the drain pipe 2 are arranged in a continuous manner.
[0031] like Figures 1-4 As shown, in actual use, the present invention firstly installs the first connector 11 at the drain outlet of the car sunroof to ensure that the water collection trough 111 can effectively collect rainwater or other liquids flowing down from the sunroof. Then, the internal thread 121 of the second connector 12 is tightly threaded to the external thread 112 of the first connector 11 to form a stable pipe connection, ensuring that the liquid will not leak during transmission. Next, the upper end of the drain pipe 2 is snapped into the snap-fit groove 122 of the second connector 12 through the lip 21. This snap-fit method is not only easy to install, but also ensures the firmness and sealing of the connection. The lower end of the drain pipe 2 is connected to the connecting section 31 of the tail plug 3 through the corrugated compensating joint 22. The design of the compensating joint 22 can absorb the vibration and thermal expansion during vehicle operation and prevent the pipe from being damaged due to rigid connection. Finally, the mounting section 32 of the tail plug 3 is fixed to the vehicle frame sheet metal to ensure the stability and reliability of the entire drainage system and prevent displacement or loosening during vehicle operation.
[0032] As a further preferred embodiment, the drain pipe 2 is fitted with a plurality of fasteners 4, the fasteners 4 including a limiting ring 41 for limiting the drain pipe 2 and a pin 42 for fixing it to the frame.
[0033] Specifically, by setting multiple fasteners 4 on the drain pipe 2, it is possible to ensure that the drain pipe remains stable during vehicle operation, avoiding drainage problems or noise issues caused by pipe loosening; at the same time, it is convenient to quickly disassemble the drain pipe for maintenance or replacement when needed, further improving the practicality and reliability of the entire drainage system.
[0034] As a further preferred embodiment, the limiting ring 41 is provided with an opening 411 at one end, and the opening 411 is provided with arc-shaped guide surfaces 412 at both ends.
[0035] Specifically, the design of the opening 411 gives the limiting ring 41 a certain degree of elasticity, making it easy to insert or remove the drain pipe 2, thus improving the convenience of installation and disassembly; the arc-shaped guide surface 412 can guide the drain pipe 2 smoothly into the interior of the limiting ring 41 during installation, reducing installation difficulty and time, which not only improves the clamping stability of the fixing part 4 on the drain pipe 2, but also can adapt to drain pipes of different diameters, enhancing the versatility and adaptability of the fixing part 4.
[0036] As a further preferred embodiment, the outer side of a section of the second connector 12 is provided with anti-slip texture 123.
[0037] As a further preferred embodiment, the lower end of the mounting section 32 is provided with a guide slope 321.
[0038] Specifically, the design of the guide ramp 321 allows the tail plug 3 to connect more smoothly with the frame sheet metal during installation. When the tail plug 3 approaches the frame sheet metal, the guide ramp 321 can guide the installation tools or components to smoothly enter the installation position, reducing resistance and friction during installation and improving installation efficiency. At the same time, the guide ramp 321 also helps to ensure the seal between the tail plug 3 and the frame sheet metal, preventing moisture from seeping in from the installation gap, and further enhancing the reliability of the drainage system.
[0039] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.
Claims
1. A skylight drainage pipe, characterized in that, include: The connector includes a first connector and a second connector. The first connector has a water receiving groove at its upper end and an external thread at its lower end. The second connector has an internal thread at one end and a snap-fit groove at the other end. A drain pipe, wherein the upper end of the drain pipe is provided with a lip that connects to the end of the second connector and the lower end is provided with a corrugated compensating joint; The tail plug includes a connecting section that connects to the drain pipe and an mounting section for fixing to the vehicle frame sheet metal, wherein the connecting section, the mounting section, and the drain pipe are arranged in a continuous manner.
2. A skylight drainage pipe according to claim 1, characterized in that, The drain pipe is fitted with several fasteners, including a limiting ring for limiting the drain pipe and a pin for fixing it to the frame.
3. A skylight drainage pipe according to claim 2, characterized in that, The limiting ring has an opening at one end, and arc-shaped guide surfaces are provided at both ends of the opening.
4. A skylight drainage pipe according to claim 1, characterized in that, The outer side of one section of the second connector is provided with anti-slip texture.
5. A skylight drainage pipe according to claim 1, characterized in that, A guide ramp is provided at the lower end of the installation section.