Mounting structure of lower frame of door and window
By installing a water-blocking plate and a snap-fit structure on the bottom frame of doors and windows, a stable triangular connection is formed, which solves the problem of water seepage at the bottom of doors and windows and improves both waterproofing and aesthetics.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-08
- Publication Date
- 2026-03-13
AI Technical Summary
Existing doors and windows are prone to water seepage at the bottom. Traditional metal plate fixing methods have problems with gaps and sealant failure, leading to rainwater accumulation and leakage, and are also unsightly.
The water baffle is fixed to the lower frame body by a snap-fit structure, forming a stable triangular connection. The physical structure of the water baffle guides the flow of rainwater, avoiding the use of sealant. The fastening effect is achieved through the snap-fit connection between the snap-fit edge and the snap-fit seat.
It effectively prevents rainwater leakage, improves waterproof reliability, is easy to install and has an attractive appearance, reduces reliance on sealant, and enhances the quality of doors and windows.
Smart Images

Figure CN223991710U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of building technology, specifically referring to an installation structure for the lower frame of doors and windows. Background Technology
[0002] Currently, the outer windowsills of doors and windows on the market are generally plastered with cement mortar, tiled, and painted to achieve waterproofing and aesthetics. However, over time, these door and window materials are very prone to cracking at the contact point with the windowsill. This not only leads to water seepage but also poses a risk of detachment. Even with sealant for waterproofing, cracks and peeling can still occur between the wall and the sealant over time, causing rainwater to accumulate and seep into the wall cracks. Worse still, some outer windowsills are made horizontally, or even sloped downwards, failing to create a proper drainage slope, resulting in severe rainwater accumulation and seepage. To solve the above problems, the traditional approach is to fold stainless steel plates or other metal plates into "L" or "Z" shapes, insert the "L" shaped metal plate between the bottom frame profile of the door or window and the windowsill, and cover the outside of the windowsill, or place the "Z" shaped metal plate against the outside of the bottom edge of the bottom frame profile of the door or window and cover the outside of the windowsill, and fix it to the bottom frame of the door or window with screws to achieve the functions of drainage and water diversion.
[0003] However, gaps will always exist between the metal plate and the bottom frame of doors and windows, allowing rainwater to seep in slowly. Even with sealant applied to these gaps, there is still a risk of sealant failure and cracking, leading to further water leakage. Furthermore, using sealant can easily clog the drainage holes on the outside of the bottom frame, creating even greater hazards, and the exposed screws are unsightly. Therefore, given the current market situation, it is urgent to develop an installation structure for bottom frames of doors and windows that effectively solves the problem of water accumulation on windowsills, prevents rainwater leakage, provides long-lasting performance, and is easy to install. Utility Model Content
[0004] In order to overcome the shortcomings of the existing technology, this utility model proposes an installation structure for the bottom frame of doors and windows.
[0005] This utility model is achieved through the following technical solution: an installation structure for the lower frame of a door or window, mainly composed of a lower frame body, a water baffle, a fixing member set at the upper end of the lower frame body, a buckle seat set at the lower end of the lower frame body, and a buckle edge with a buckle head at one end and fixedly connected to the water baffle at the other end; the upper edge of the water baffle is provided with a connector that matches the fixing member, the water baffle is connected to the fixing member through the connector, and the buckle head of the buckle edge is fastened to the buckle seat.
[0006] Furthermore, the water baffle is composed of a fixed plate, a connecting plate, and a lower folding plate. The fixed plate is located on one side of the connecting plate and connected to one end of the connecting plate, while the lower folding plate is located on the other side of the connecting plate and connected to the other end of the connecting plate. The upper edge of the fixed plate is the upper edge of the water baffle, and the lower edge of the lower folding plate is the lower edge of the water baffle.
[0007] As one of the preferred embodiments, the fastener is an arc-shaped inner edge and the connector is an arc-shaped outer edge, and the inner and outer edges can be interlocked and connected to each other.
[0008] As a second preferred embodiment, the fastener consists of a horizontal end fixedly connected to the side wall of the lower frame body, and one or more protrusions disposed on the horizontal end and located on its lower side; the connector is the upper edge of the fixing plate.
[0009] An angle α is formed between the plane of the fixing plate and the plane of the connecting plate, and the value of the angle α is in the range of 90°≤α≤160°.
[0010] The lower edge of the water baffle is lower than the plane where the bottom of the lower frame body is located.
[0011] Compared with the prior art, this utility model has the following advantages and beneficial effects:
[0012] 1. This utility model has a fixing component on the lower frame body, and a connector matching the fixing component is provided at the upper edge of the baffle plate. Therefore, the baffle plate can be fixed to the upper side wall of the lower frame body through the fastening connection between the connector and the fixing component. At the same time, this utility model also has a buckle seat at the lower end of the lower frame body, and an integrally formed buckle edge is provided on the baffle plate. The buckle edge can be fastened to the buckle seat. Therefore, the above structure can form a stable triangle between the baffle plate, the buckle edge and the side wall of the lower frame body, which can significantly increase its stability.
[0013] 2. The lower edge of the water baffle of this utility model is lower than the bottom plane of the lower frame body, thus effectively preventing rainwater from entering the bottom of the door and window frame.
[0014] 3. This utility model guides the flow of rainwater through the physical structure of the water-blocking plate, rather than relying on chemical waterproofing methods such as sealant to achieve the purpose of waterproofing. Therefore, it can reduce the dependence on auxiliary waterproofing methods such as sealant and significantly improve the reliability of waterproofing.
[0015] 4. This utility model ingeniously utilizes a snap-fit structure to fix the water baffle to the outside of the lower frame body, achieving a stable connection without screws. It is not only convenient and quick to install and aesthetically pleasing, but also significantly enhances the grade of doors and windows. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the first structure of this utility model.
[0017] Figure 2 This is a schematic diagram of the second structure of this utility model.
[0018] Figure 3 This is a schematic diagram of the third structure of this utility model.
[0019] The reference numerals in the attached drawings are as follows: 1—lower frame body, 2—water baffle, 3—fixing component, 4—connecting component, 5—buckle edge, 6—buckle seat, 51—buckle head, 21—fixing plate, 22—connecting plate, 23—lower folding plate, 31—horizontal end, 32—protrusion, 33—gap groove. Detailed Implementation
[0020] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.
[0021] Example 1
[0022] like Figure 1 As shown, the installation structure of the lower frame of the door and window described in this embodiment mainly consists of a lower frame body 1, a water baffle 2, a fastener 3 located at the upper end of the side wall of the lower frame body 1, a buckle seat 6 located at the lower end of the side wall of the lower frame body 1, and a buckle edge 5.
[0023] The lower frame body 1 is the lower frame of a door or window. One end of the snap-fit edge 5 has a snap-fit head 51, and the other end is fixedly connected to the baffle plate 2. A connector 4 matching the fixing member 3 is provided at the upper edge of the baffle plate 2, and the fixing member 3 and the connector 4 can be interlocked. The specific structure is as follows: Figure 1 and Figure 2 As shown, the fastener 3 has an inner arc-shaped buckle, and the connector 4 has an outer arc-shaped buckle, and the inner and outer buckles can be interlocked and connected to each other. Depending on the actual situation, the fastener 3 and connector 4 can also have other structural shapes, as long as the fastener 3 and connector 4 can be interlocked or connected and fixed to each other.
[0024] In this embodiment, the water baffle 2 is a flat plate, and its structure is as follows: Figure 2 As shown. At this time, the baffle plate 2 needs to be set at an angle, the buckle head 51 of the buckle edge 5 is engaged with the buckle seat 6, and the other end of the buckle edge 5 is fixed to the baffle plate 2. The specific shape of the plate is determined according to the actual needs of the user, and can be rectangular, elongated, elliptical or semi-circular, etc.
[0025] After installation using the above structure, since the buckle seat 6 is fixedly connected to the lower frame body 1 and the buckle edge 5 is fixedly connected to the baffle plate 2, when the buckle head 51 of the buckle edge 5 is fastened to the buckle seat 6, the upper edge of the baffle plate 2, the fixed connection point between the buckle edge 5 and the baffle plate 2, and the fixed connection point between the buckle seat 6 and the lower frame body 1 form the three vertices of a triangle. Because triangles have strong stability, the baffle plate 2 in this embodiment can, under its own weight, tightly fasten the buckle head 51 of the buckle edge 5 to the buckle seat 6, thereby ensuring the stability of the entire baffle plate 2 after installation.
[0026] Example 2
[0027] The difference between this embodiment and embodiment 1 is the structure of the water baffle 2. In this embodiment, the water baffle 2 consists of three parts: a fixing plate 21, a connecting plate 22, and a lower folding plate 23, as shown in the figure. Figure 1 and Figure 3 As shown, the fixing plate 21 and the lower folding plate 23 are located on both sides of the connecting plate 22, with one end of the fixing plate 21 connected to one end of the connecting plate 22, and one end of the lower folding plate 23 connected to the other end of the connecting plate 22. This allows the fixing plate 21, connecting plate 22, and lower folding plate 23 to be sequentially connected to form a shape resembling a "Z". At this time, the connecting plate 22 needs to be tilted, with the snap-fit head 51 of the snap-fit edge 5 engaging with the snap-fit seat 6, and the other end of the snap-fit edge 5 being fixedly integrated with the connecting plate 22.
[0028] In this structure, the upper edge of the fixed plate 21 is the upper edge of the water baffle 2, and the lower edge of the lower folding plate 23 is the lower edge of the water baffle 2.
[0029] Regardless of the shape or configuration of the baffle 2, the lower edge of the baffle 2 must be lower than the bottom plane of the lower frame body 1, thereby ensuring that the baffle 2 can cover the entire lower part of the lower frame body 1, preventing the gap between the lower frame body 1 and the outer windowsill of the door and window from being exposed, and further preventing external rainwater from seeping in.
[0030] When the water baffle 2 is composed of three parts: a fixed plate 21, a connecting plate 22, and a lower folding plate 23, an angle α is formed between the plane of the fixed plate 21 and the plane of the connecting plate 22 to facilitate drainage. The value of the angle α can be set arbitrarily according to the site conditions, and its value range is generally between 90°≤α≤160°.
[0031] After installation using the above structure, since the buckle seat 6 is integrally formed with the lower frame body 1, and the buckle edge 5 is integrally formed with the connecting plate 22, when the buckle head 51 of the buckle edge 5 is fastened to the buckle seat 6, the upper edge of the fixing plate 21, the fixed connection point between the buckle edge 5 and the connecting plate 22, and the fixed connection point between the buckle seat 6 and the lower frame body 1 form the three vertices of a triangle. Because triangles have strong stability, the baffle 2 in this embodiment can, under its own weight, tightly fasten the buckle head 51 of the buckle edge 5 to the buckle seat 6, thereby ensuring the stability of the entire baffle 2 after installation.
[0032] In this embodiment, the buckle seat 6 and buckle head 51 can be implemented in any shape, as long as they can achieve the purpose of fastening without separating.
[0033] Example 3
[0034] The difference between this embodiment and Embodiments 1 and 2 is the structural method of the fastener 3. For example... Figure 2 As shown, the fastener 3 consists of a horizontal end 31 fixedly connected to the side wall of the lower frame body 1, and one or more protrusions 32 disposed on the horizontal end 31 and located on its lower side. At this time, there will be one or more gap grooves 33 between two adjacent protrusions 32 or between the protrusion 32 and the side wall of the lower frame body 1.
[0035] Since the structure of the water baffle 2 can be either the structure of Embodiment 1 or Embodiment 2, when the water baffle 2 is the structure of Embodiment 1, the connecting member 4 is the upper edge of the water baffle 2; when the structure of the water baffle 2 is the structure of Embodiment 2, the connecting member 4 is the upper edge of the fixing plate 21.
[0036] In this embodiment, the connector 4 of the baffle plate 2 is disposed inside the gap groove 33, and the connector 4 of the baffle plate 2 is connected to the protrusion 32 in a contact-fixed manner. Contact fixing means that the two components are connected only through mutual contact without being fixed, so that the two components can be easily separated at any time. When using contact fixing, factors such as the direction of force and the coefficient of friction between the two connecting components need to be considered. Therefore, the rationality and ingenuity of the overall structural design are necessary when using contact fixing.
[0037] When there are two or more gap grooves 33, the installer can select the appropriate gap groove 33 according to actual needs, so that the upper position of the baffle plate 2 can be flexible.
[0038] In order to minimize the noise generated when rainwater drips onto the baffle 2, the baffle 2 in all the above embodiments can be made into one or more cavity structures, and the cavity structure is filled with foaming agent to increase its overall strength.
[0039] As described above, this utility model can be implemented quite well.
Claims
1. An installation structure for the lower frame of a door or window, characterized in that, The utility model relates to a lower frame body (1), a water baffle (2), a fixing piece (3) arranged at the upper end position of the lower frame body (1), a buckle seat (6) arranged at the lower end position of the lower frame body (1) and a buckle side (5) with one end provided with a buckle head (51) and the other end fixedly connected with the water baffle (2) are connected.
2. The mounting structure for a door and window lower frame according to claim 1, wherein The water baffle (2) is composed of a fixed plate (21), a connecting plate (22) and a lower folding plate (23), the fixed plate (21) is located on one side of the connecting plate (22) and connected with one end of the connecting plate (22), and the lower folding plate (23) is located on the other side of the connecting plate (22) and connected with the other end of the connecting plate (22); the upper edge of the fixed plate (21) is the upper edge of the water baffle (2), and the lower end edge of the lower folding plate (23) is the lower edge of the water baffle (2).
3. The mounting structure for a door and window lower frame according to claim 2, wherein The fixing piece (3) is an arc-shaped inner buckle side, the connecting piece (4) is an arc-shaped outer buckle side, and the inner buckle side and the outer buckle side can be connected with each other.
4. The mounting structure for a door and window lower frame according to claim 2, wherein The fixing piece (3) is composed of a horizontal end (31) fixedly connected with the side wall of the lower frame body (1) and one or more than one protrusions (32) arranged on the horizontal end (31) and located on the lower side thereof; the connecting piece (4) is the upper edge of the fixed plate (21).
5. The mounting structure for a lower sash of a door or window according to any one of claims 2 to 4, characterized in that, An included angle alpha is formed between the plane of the fixed plate (21) and the plane of the connecting plate (22).
6. The mounting structure for a door and window lower frame according to claim 5, wherein The included angle alpha is 90°≤ alpha ≤ 160°.
7. The mounting structure for a door and window lower frame according to claim 5, wherein The lower edge of the water baffle (2) is lower than the plane where the bottom of the lower frame body (1) is located.