A sliding door sealing device
By adopting a design that connects a fixed block and a sliding block on the sliding door, the sliding block adapts to the changes in the gap under the support of the spring, which solves the problem of sealing failure or jamming in the existing technology and achieves continuous and effective sealing and smooth operation.
Patent Information
- Application Number
- CN202521740678.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-15
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-08-15
AI Technical Summary
Existing sliding door sealing structures cannot adapt to changes in gaps, leading to sealing failure, increased movement resistance, or even jamming.
The design employs a connection between a fixed block and a sliding block. The sliding block slides elastically up and down with the support of a spring. The weatherstripping is installed on the sliding block, and combined with the guide design and limit hook, it ensures that the weatherstripping adapts to changes in gaps, providing a continuous and effective seal.
It achieves adaptive dynamic sealing, ensuring stable and smooth sealing performance, adapting to changes in gaps, preventing the sliding block from tilting or jamming, and guaranteeing long-term reliability.
Smart Images

Figure CN224679407U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a sliding door sealing device, belonging to the field of door and window sealing technology. Background Technology
[0002] Sliding doors consist of a door frame and door panels that move along a track. The door panels require a certain gap to slide smoothly along the track. Currently, the sealing structure for this gap typically involves a sealing block fixed to the edge of the door panel, with a weatherstripping attached to the block. This weatherstripping fills the gap. However, when the gap between the door panel and the upper and lower frames is large, especially in lift-type sliding doors which need to be lifted a certain height, traditional sealing devices cannot completely block the gap and therefore do not provide a good seal.
[0003] For example, CN202222175364.6 discloses a lifting sliding door leaf end sealing structure, which uses a fixed sealing block to seal the gap. This sealing structure cannot adapt to the dynamic changes of the gap. When the gap becomes larger, there will be a problem of sealing failure. When the gap becomes smaller, the door leaf movement resistance will increase, and even jamming or wear of the sealing strip will occur.
[0004] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content
[0005] This invention addresses the shortcomings of the prior art by providing a sliding door sealing device that can achieve adaptive dynamic sealing. Regardless of whether the gap increases or decreases, it can provide a continuous, stable, and effective seal. Furthermore, it employs precise guidance to ensure the long-term reliability and smoothness of the dynamic sealing function.
[0006] To solve the above technical problems, the present invention adopts the following technical solution:
[0007] A sliding door sealing device includes a fixed block installed on the hook edge of the door leaf, a sliding block slidably connected to the fixed block, the sliding block and the fixed block being connected by two springs arranged side by side, the sliding block sliding up and down elastically under the support of the springs, and a weatherstripping that serves a sealing function being installed on the sliding block; a snap cover slidably connected to the fixed block is installed on the outside of the fixed block.
[0008] Furthermore, the fixing block has two fixing holes arranged symmetrically on the left and right sides, which are used for screws to pass through.
[0009] Furthermore, a slide rail a is provided on both the left and right sides of the fixing block. The slide rail a is used for the sliding installation of the cover. A sliding baffle a is provided on the inner side of the two slide rails a facing each other. The sliding baffle a is used for the sliding installation of the sliding block. A profile positioning block is provided on the end face of the sliding baffle a near the door leaf hook edge.
[0010] Furthermore, a limiting hook is provided in the middle of the fixing block, and spring grooves are provided on the left and right sides of the limiting hook, which are used to install the end of the spring.
[0011] Furthermore, the sliding block is provided with slide rails b on its left and right sides respectively, and is installed in the fixed block through slide rails b.
[0012] Furthermore, a limiting groove is provided in the middle of the sliding block, which is used for the sliding of the limiting hook, and limiting walls are provided on both sides of the limiting groove.
[0013] Furthermore, a spring seat is provided at the bottom of the limiting wall, which is used to install the end of the spring.
[0014] Furthermore, the top of the sliding block is provided with a weatherstrip groove for installing weatherstripping, and the cross-section of the weatherstripping groove is a T-shaped structure.
[0015] Furthermore, sliding baffles are provided on both sides of the cover near the end face of the fixing block.
[0016] Furthermore, a retaining strip is provided on the end face of the cover near the fixing block.
[0017] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages:
[0018] This utility model installs the weatherstripping on a movable sliding block. Under the action of a spring, the weatherstripping can move up and down and float elastically, allowing it to adapt to height changes and continuously provide an effective seal. This satisfies the sealing requirements of different gaps between the sliding door and the upper and lower frames, and provides a continuous, stable, and effective seal, especially for lift-type sliding doors.
[0019] The fixed block and sliding block in this invention adopt a guide design to ensure that the sliding block can only move along the vertical path and will not be tilted or jammed, thus ensuring the long-term reliability and smoothness of the dynamic sealing function. By embedding the limiting hook on the fixed block into the limiting groove of the sliding block, the sliding range can be limited to prevent the sliding block from being completely ejected or excessively compressed under the action of the spring.
[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description
[0021] Figure 1 This is an installation diagram of this utility model;
[0022] Figure 2 This is a three-dimensional structural view of the present invention;
[0023] Figure 3 This is an exploded view of the structure of this utility model;
[0024] Figure 4This is an exploded view of the structure of this utility model in another direction;
[0025] Figure 5 This is a structural diagram of the fixed block;
[0026] Figure 6 This is a schematic diagram of the sliding block structure;
[0027] Figure 7 This is a schematic diagram of the cover structure.
[0028] In the diagram, 1-fixing block, 11-fixing hole, 12-sliding baffle a, 13-profile positioning block, 14-spring groove, 15-limiting hook, 16-slide rail a; 2-sliding block, 21-limiting groove, 22-limiting wall, 23-spring seat, 24-slide rail b, 25-rough edge groove; 3-clasp, 31-sliding baffle b, 32-locking strip; 4-spring; 5-rough edge; 6-door leaf hook edge; 7-upper / lower frame. Detailed Implementation
[0029] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.
[0030] like Figures 1-7 As shown in the figure, this utility model provides a sliding door sealing device, which is installed on the door leaf hook edge 6 to effectively seal the gap between the sliding door and the upper / lower frame 7.
[0031] A sliding door sealing device includes a fixing block 1 installed on the door leaf hook edge 6, a sliding block 2 slidably connected to the fixing block 1, the sliding block 2 and the fixing block 1 being connected by two springs 4 arranged side by side, the sliding block 2 sliding up and down elastically under the support of the springs 4, and a weatherstripping 5 that serves a sealing function being installed on the sliding block 2; a buckle cover 3 slidably connected to the outside of the fixing block 1 is installed.
[0032] The fixing block 1 has two fixing holes 11 arranged symmetrically on the left and right sides. The fixing holes 11 are used for screws to pass through. The screws pass through the fixing holes 11 to fix the fixing block 1 to the door leaf hook edge 6.
[0033] A slide rail a16 is provided on both the left and right sides of the fixing block 1. The slide rail a16 is used for the sliding installation of the cover 3. A sliding baffle a12 is provided on the inner side of the two slide rails a16. The sliding baffle a12 is used for the sliding installation of the sliding block 2. A profile positioning block 13 is provided on the end face of the sliding baffle a12 near the door leaf hook edge 6, which facilitates the positioning and installation of the fixing block 1 in the profile groove of the door leaf hook edge 6.
[0034] The middle part of the fixing block 1 is provided with a limiting hook 15, and the left and right sides of the limiting hook 15 are respectively provided with spring grooves 14, which are used to install the end of the spring 4.
[0035] The sliding block 2 is provided with slide rails b24 on its left and right sides respectively, and is installed in the fixed block 1 through the slide rails b24.
[0036] The sliding block 2 has a limiting groove 21 in the middle, which is used for the sliding of the limiting hook 15. The limiting groove 21 has limiting walls 22 on both sides, which can be used to easily insert the limiting hook 15 into the limiting groove 21 through the elastic deformation of the limiting walls 22.
[0037] The bottom of the limiting wall 22 is provided with a spring seat 23, which is used to install the end of the spring 4. The spring 4 is securely installed between the spring groove 14 and the spring seat 23.
[0038] The top of the sliding block 2 is provided with a weatherstrip groove 25 for installing the weatherstrip 5. The cross-section of the weatherstrip groove 25 is a T-shaped structure.
[0039] The cover 3 is provided with sliding baffles b31 on both sides of the end face near the fixed block 1. The cover 3 is slidably installed into the slide a16 of the fixed block 1 through the sliding baffles b31. The cover 3 is provided with a retaining strip 32 on the end face near the fixed block 1. Under the action of the retaining strip 32, the cover 3 and the fixed block 1 are interference fit and can be tightly fastened to the fixed block 1.
[0040] The specific working principle of this utility model is as follows:
[0041] This utility model is used for the edge sealing of sliding doors and windows. Through structural design, the weatherstripping is installed on a movable sliding block. Under the action of a spring, the weatherstripping can move up and down and float elastically, so that the weatherstripping can adapt to changes in height and continuously provide an effective seal. It meets the sealing requirements of different gaps between the sliding door and the upper and lower frames, especially for lifting sliding doors. This utility model also plays a certain decorative role after installation.
[0042] The fixed block and sliding block in this invention employ a guide design to ensure that the sliding block can only move along a vertical path and will not skew or jam. By embedding the limiting hook on the fixed block into the limiting groove of the sliding block, the sliding range can be limited, preventing the sliding block from being completely ejected or excessively compressed under the action of the spring.
[0043] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.
Claims
1. A sliding door sealing device, characterized in that: Includes a fixing block (1) installed on the door leaf hook edge (6), a sliding block (2) slidably connected to the fixing block (1), the sliding block (2) and the fixing block (1) are connected by two springs (4) arranged side by side, the sliding block (2) slides up and down elastically under the support of the springs (4), and a weatherstripping (5) with a sealing function is installed on the sliding block (2); a buckle (3) slidably connected to the outside of the fixing block (1) is installed.
2. The sliding door sealing device as described in claim 1, characterized in that: The fixing block (1) has two fixing holes (11) arranged symmetrically on the left and right sides. The fixing holes (11) are used for screws to pass through.
3. The sliding door sealing device as described in claim 1, characterized in that: A slide a (16) is provided on both the left and right sides of the fixed block (1). A sliding baffle a (12) is provided on the inner side of the two slides a (16) facing each other. A profile positioning block (13) is provided on the end face of the sliding baffle a (12) near the door leaf hook edge (6).
4. A sliding door sealing device as described in claim 3, characterized in that: The middle part of the fixed block (1) is provided with a limiting hook (15), and the left and right sides of the limiting hook (15) are respectively provided with spring grooves (14).
5. A sliding door sealing device as described in claim 1, characterized in that: The sliding block (2) is provided with slide rails b (24) on its left and right sides respectively, and is installed in the fixed block (1) through slide rails b (24).
6. A sliding door sealing device as described in claim 5, characterized in that: The sliding block (2) has a limiting groove (21) in the middle. The limiting groove (21) is used for the sliding of the limiting hook (15). Limiting walls (22) are provided on both sides of the limiting groove (21).
7. A sliding door sealing device as described in claim 6, characterized in that: The bottom of the limiting wall (22) is provided with a spring seat (23).
8. A sliding door sealing device as described in claim 1, characterized in that: The top of the sliding block (2) is provided with a sprue groove (25) for installing the sprue (5), and the cross section of the sprue groove (25) is a T-shaped structure.
9. A sliding door sealing device as described in claim 1, characterized in that: The cover (3) is provided with sliding baffles (31) on both sides near the end face of the fixing block (1).
10. A sliding door sealing device as described in claim 9, characterized in that: The cover (3) has a retaining strip (32) on the end face near the fixing block (1).
Citation Information
Patent Citations
Sealing structure for end part of lifting sliding door leaf
CN218407224U