A door track capable of quick adjustment

By combining the drive motor and the guide device, and utilizing the design of the adjusting screw and the fixing screw, the problem of the door track being unable to be adjusted in angle and fixed on the side is solved, realizing multi-angle adjustment and stable installation of the door track, and improving the flexibility and stability of use.

CN117328756BActive Publication Date: 2026-04-21BODA GANGLI INTELLIGENT EQUIP TECH (SHANDONG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BODA GANGLI INTELLIGENT EQUIP TECH (SHANDONG CO LTD
Filing Date
2023-11-15
Publication Date
2026-04-21

AI Technical Summary

Technical Problem

The existing door track cannot control the different degrees of door opening, and it is not convenient to fix the side of the door track.

Method used

By employing a drive motor and a guiding device, and through the design of adjusting screws and fixing screws, the door track can be quickly adjusted and fixed on the side. The inclined surface design of the support block and limit block enables multi-angle adjustment and stable installation of the door track.

Benefits of technology

It enables multi-angle adjustment of the door track, facilitating the installation and disassembly of the door track, making it suitable for different working environments, and improving the flexibility and stability of use.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention discloses a quickly adjustable door track, specifically relating to the field of sliding door track technology. It includes a track body, a drive motor fixed to one side of the shorter inner cavity of the track body, a fixing rod fixed to the output end of the drive motor, and a fixing screw fixed to the end of the fixing rod away from the drive motor. Two limiting rods are fixedly installed between the two shorter inner cavities of the track body, and multiple guiding devices are slidably installed on the outer surfaces of the two limiting rods. Fixing devices are provided at the four corners of the top surface of the track body's inner cavity to facilitate door track installation. This invention's quickly adjustable door track, with its guiding device design, allows the door track to be adapted to different working environments. The fixing device design allows the top and side surfaces of the door track to be fixed simply by rotating multiple adjusting screws, facilitating door track installation.
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Description

Technical Field

[0001] This invention relates to the field of sliding door track technology, and in particular to a door track that can be quickly adjusted. Background Technology

[0002] There are two main types of sliding door tracks: hanging tracks and floor tracks. In order to ensure the uniformity of the floor material when the door is open, most sliding doors now use hanging tracks instead of floor tracks. Based on the installation method of the guide rail, sliding doors can be divided into exposed track sliding doors and concealed track sliding doors.

[0003] Chinese patent document CN205063780U discloses a roller shutter door track, comprising: a track body, which is a vertically and horizontally open column; an opening extending vertically through the side of the track body; and slots on both sides of the opening for fixing brushes. The beneficial effects of this utility model are: through the structural design of the roller shutter door track, the service life of the roller shutter door can be extended and its performance improved; furthermore, by incorporating principles of structural mechanics, the thickness of the roller shutter door track is specifically designed, increasing performance while reducing production costs.

[0004] However, the door track cannot be controlled to open the door to different degrees during use; the opening degree can only be determined manually. In addition, the door track can only be fixed to the top surface, making it inconvenient to fix the sides of the door track. Summary of the Invention

[0005] The main objective of this invention is to provide a door track that can be quickly adjusted, which can effectively solve the problems that the device cannot control the different degrees of door opening through the door track during use, and that it is inconvenient to fix the side of the door track.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A quick-adjustable door track includes a track body. A drive motor is fixed to one side of the shorter inner cavity of the track body. A fixing rod is fixed to the output end of the drive motor. A fixing screw is fixed to the end of the fixing rod away from the drive motor. Two limiting rods are fixedly installed between the two shorter inner cavities of the track body. Multiple guiding devices are slidably installed on the outer surfaces of the two limiting rods. Fixing devices for easy installation of the door track are provided at the four corners of the top surface of the inner cavity of the track body.

[0008] The fixing device includes a fixing housing. A support groove is formed on one side of the inner cavity of the fixing housing near the shorter side of the track body. A plurality of through grooves adapted to the support groove are also formed on the outer surface of the track body. A support block is slidably installed in the inner cavity of the support groove. An adjusting screw is threadedly installed on the upper end of the fixing housing. A connecting rod is fixed to the upper end of the adjusting screw. A fixing screw is fixed to the end of the connecting rod away from the adjusting screw. A limiting block is rotatably installed on the outer surface of the connecting rod and slidably connected to the inner surface of the fixing housing.

[0009] Preferably, the bottom surface of the support block one is inclined upward on the side near the connecting rod one, and the top surface of the limiting block is inclined downward on the side near the support block one. The inclined surface of the support block one is in contact with the inclined surface of the limiting block. When the adjusting screw is at the lowest position, both the fixing screw and the support block one are located in the track body.

[0010] Preferably, the guiding device includes a guide block slidably connected to the two limiting rods. The end of the guide block away from the drive motor has a through groove adapted to the fixing screw. The lower end of the guide block has an installation groove. A rotating rod is movably mounted on the bottom surface of the installation groove. A first gear is fixed to the upper end of the rotating rod, and a second gear is fixed to the outer surface of the rotating rod. A third gear meshing with the second gear is movably mounted on the upper end of the guide block. A fixed rack meshing with the third gear is fixedly mounted on the upper end of the guide block. A mounting bracket is fixed to the upper end of the guide block. The inner cavity of the track body has an adjustment mechanism adapted to the first gear.

[0011] Preferably, the inner surface of the second through groove does not contact the fixing screw.

[0012] Preferably, a second rotating rod is rotatably mounted on the outer surface of the first rotating rod, and two adjacent second rotating rods are rotatably connected.

[0013] Preferably, the end of the guide block furthest from the drive motor is fixedly mounted with a fixing block that is threadedly connected to the fixing screw.

[0014] Preferably, the adjustment mechanism includes a fixed bracket fixedly installed on the upper end of the mounting bracket. A spring telescopic rod is fixed to one end of the fixed bracket near the fixed rack. A friction strip for limiting the first gear is fixed to the output end of the spring telescopic rod. Multiple spring telescopic rods are fixed to one side of the inner cavity of the track body near the fixed rack. The output ends of the multiple spring telescopic rods are jointly fixed to a fixed rack that matches the first gear. A support block is fixed to the upper end of the friction strip. A support block is fixed to the upper end of the fixed rack that matches the support block. Multiple actuating rods extending outward through the track body are fixed to the upper end of the fixed rack.

[0015] Preferably, when the spring telescopic rod is in its natural state, the friction strip limits the movement of the first gear.

[0016] Preferably, when the second spring telescopic rod is in its natural state, the second fixed rack is not in contact with the first gear, and the first spring telescopic rod is in its natural state at the point where the second support block and the third support block are connected.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This door track adopts a guide device design. Through the mutual cooperation between the fixed rack two, the first gear, the third gear, and the fixed rack one, the door track can adjust the distance between multiple guide blocks during use. At the same time, due to the different movement distances of multiple guide blocks, the device can further adjust the distance of multiple door movements during use, so that the door can be opened to different degrees, making the door track suitable for different working environments.

[0019] This door track employs a fixing device design. Through the interplay between adjusting screws and fixing screws, the device allows the fixing screws to be embedded into the wall to secure the door track. Simultaneously, the interplay between support blocks and limiting blocks ensures that multiple support blocks fit snugly against the inner cavity of the fixing groove when the fixing screws are embedded in the wall, facilitating the fixation of the door track. Furthermore, the device allows for easy fixing of the top and sides of the door track simply by rotating multiple adjusting screws, simplifying the installation of the door track. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a partial structural diagram of the device of the present invention. Figure 1 ;

[0022] Figure 3 This is a partial structural diagram of the device of the present invention. Figure 2 ;

[0023] Figure 4 This is a schematic diagram of the fixing device of the present invention. Figure 1 ;

[0024] Figure 5 This is a schematic diagram of the fixing device of the present invention. Figure 2 ;

[0025] Figure 6 This is a schematic diagram of the guiding device of the present invention. Figure 1 ;

[0026] Figure 7 This is a schematic diagram of the guiding device of the present invention. Figure 2 ;

[0027] Figure 8 For the present invention Figure 2 Enlarged view of point A in the middle;

[0028] Figure 9 This is a partial structural diagram of the device of the present invention. Figure 3 ;

[0029] Figure 10 For the present invention Figure 9 Enlarged view of point B in the middle;

[0030] Figure 11 This is a schematic diagram of the device of the present invention during installation.

[0031] In the diagram: 1. Track body; 2. Guiding device; 3. Fixing device; 4. Adjusting mechanism; 11. Drive motor; 12. Fixing rod; 13. Fixing screw; 14. Limiting rod; 21. Guide block; 22. Through slot two; 23. Mounting slot; 24. Rotating rod one; 25. First gear; 26. Second gear; 27. Third gear; 28. Fixing rack one; 29. ​​Mounting bracket; 31. Fixing housing; 32. Support slot; 33. Support block one; 34. Adjusting screw; 35. Connecting rod one; 36. Fixing screw; 37. Limiting block; 41. Fixing bracket; 42. Spring telescopic rod one; 43. Friction strip; 44. Spring telescopic rod two; 45. Fixing rack two; 46. Support block two; 47. Support block three; 48. Actuating rod. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments. Example

[0033] like Figure 1 - Figure 3 As shown, a quick-adjustable door track includes a track body 1. A drive motor 11 is fixed to one side of the shorter inner cavity of the track body 1. The drive motor 11 can also be replaced by a crank for manual control. A fixing rod 12 is fixed to the output end of the drive motor 11. A fixing screw 13 is fixed to the end of the fixing rod 12 away from the drive motor 11. Two limiting rods 14 are fixedly installed between the two shorter inner cavities of the track body 1. Multiple guide devices 2 are slidably installed on the outer surfaces of the two limiting rods 14. Fixing devices 3 are provided at the four corners of the top surface of the inner cavity of the track body 1 to facilitate the installation of the door track.

[0034] Furthermore, to facilitate the installation and fixing of the door track, such as... Figure 4 and Figure 5 As shown, the fixing device 3 includes a fixing housing 31. A support groove 32 is formed on one side of the inner cavity of the fixing housing 31 near the shorter side of the track body 1. Multiple through grooves adapted to the support groove 32 are also formed on the outer surface of the track body 1. Support blocks 33 are slidably installed inside the support groove 32. The through grooves facilitate contact between the support blocks 33 and the inner surface of the fixing groove where the door track is installed. Furthermore, the design of the through grooves allows the multiple support blocks 33 to support the door track when moving outwards from the track body 1. An adjusting screw 34 is threaded onto the upper end of the 1. A connecting rod 35 is fixed to the upper end of the adjusting screw 34. A fixing screw 36 is fixed to the end of the connecting rod 35 away from the adjusting screw 34. When the adjusting screw 34 rotates, it can drive the fixing screw 36 to rotate. When the fixing screw 36 passes through the track body 1 upwards, the fixing screw 36 continues to rotate, thus rotating into the wall. At the same time, due to the design of multiple support blocks 33, the door track is installed in the groove. A limiting block 37 is rotatably installed on the outer surface of the connecting rod 35 and slidably connected to the inner surface of the fixed housing 31.

[0035] In addition, such as Figure 4 and Figure 5As shown, the bottom surface of support block 33 near the connecting rod 35 is inclined upwards, and the top surface of limiting block 37 near support block 33 is inclined downwards. Due to the inclined surface design of support block 33 and limiting block 37, when the operator rotates the adjusting screw 34 in the tightening direction, multiple support blocks 33 can move outwards from the track body 1. When the door frame needs to be disassembled, the adjusting screw 34 needs to be rotated in the loosening direction, so that multiple fixing screws 36 come out from the wall. At the same time, because the wall will give support block 33 a reaction force, it is easy to remove the door frame. The inclined surface of the support block 33 contacts the inclined surface of the limit block 37. When the adjusting screw 34 is at the lowest position, the fixing screw 36 and the support block 33 are both located inside the track body 1. This allows the operator to move multiple support blocks 33 to the outside of the track body 1 when rotating the adjusting screw 34. At the same time, since the fixing screw 36 and the adjusting screw 34 are fixedly connected by the connecting rod 35, multiple fixing screws 36 also move upward. This allows the operator to fix the door frame by simply rotating multiple adjusting screws 34 during installation, which facilitates the installation of the door track.

[0036] The specific implementation of this embodiment is as follows: When using the device, a fixing groove is first opened on the wall where the door track needs to be installed. Then, the track body 1 is placed in the opening fixing groove. The operator rotates multiple adjusting screws 34 one after another, so that the fixing screw 36 moves upward and can also rotate. Due to the characteristics of the fixing screw 36, the fixing screw 36 is inserted into the wall. In addition, due to the sliding connection between the limiting block 37 and the fixing housing 31, and the rotational connection between the limiting block 37 and the connecting rod 35, the limiting block 37 can move upward. Furthermore, due to the design of the inclined surface of the support block 33 and the limiting block 37, multiple support blocks 33 move outward from the track body 1, so that multiple support blocks 33 fit into the inner cavity of the fixing groove, which facilitates the limiting of the track body 1 by multiple support blocks 33.

[0037] Due to the design of multiple support blocks 33 and multiple fixing screws 36 working together, the door track can be fixed. When the door track needs to be disassembled, multiple adjusting screws 34 are rotated again to pull the multiple fixing screws 36 out of the wall. At the same time, the wall will give a reaction force to the support blocks 33, which makes it easy to remove the door frame. Example

[0038] This embodiment is a further improvement on the guide device 2 based on the first embodiment, so that the degree to which the door is opened can be adjusted when the device is in use.

[0039] like Figure 6 and Figure 7As shown, the guiding device 2 includes a guide block 21 slidably connected to two limiting rods 14. The two limiting rods 14 limit the guide block 21, allowing it to slide but not rotate. A through groove 22, matching the fixing screw 13, is provided at the end of the guide block 21 away from the drive motor 11. The inner surface of the through groove 22 does not contact the fixing screw 13, preventing the through groove 22 from moving when the fixing screw 13 rotates. A mounting groove 23 is provided at the lower end of the guide block 21. A rotating rod 24 is movably mounted on the bottom surface of the mounting groove 23. The mounting groove 23 and the rotating rod 24 are movably connected, allowing the rotating rod 24 to rotate and slide within the mounting groove 23. A first gear 25 is fixed to the upper end of the rotating rod 24, and a second gear 26 is fixed to the outer surface of the rotating rod 24. Simultaneously, as... Figure 8 As shown, a second rotating rod is rotatably mounted on the outer surface of the first rotating rod 24, and two adjacent second rotating rods are rotatably connected.

[0040] In addition, a third gear 27 that meshes with the second gear 26 is movably mounted on the upper end of the guide block 21. The meshing between the second gear 26 and the third gear 27 enables the third gear 27 to rotate when the rotating rod 24 rotates. A fixed rack 28 that meshes with the third gear 27 is fixedly mounted on the upper end of the guide block 21. Due to the movable connection between the third gear 27 and the guide block 21, the third gear 27 can slide relative to the guide block 21 when it rotates. At the same time, it can also drive the rotating rod 24 to rotate and slide in the mounting groove 23. A mounting bracket 29 is fixed on the upper end of the guide block 21. An adjustment mechanism 4 that is adapted to the first gear 25 is provided in the inner cavity of the track body 1.

[0041] like Figure 9 and Figure 10 As shown, the guide block 21 furthest from the drive motor 11 has a fixed block that is threadedly connected to the fixed screw 13 at one end. Due to the design of multiple rotating rods, multiple guide blocks 21 can move simultaneously when the fixed screw 13 rotates. At the same time, due to the design that the fixed screw 13 is not connected to multiple guide blocks 21, multiple guide blocks 21 cannot be moved when the fixed screw 13 rotates.

[0042] like Figure 8As shown, the adjustment mechanism 4 includes a fixed bracket 41 fixedly installed on the upper end of the mounting bracket 29. A spring telescopic rod 42 is fixed to one end of the fixed bracket 41 near the fixed rack 28. A friction strip 43 for limiting the first gear 25 is fixed to the output end of the spring telescopic rod 42. When the spring telescopic rod 42 is in its natural state, the friction strip 43 limits the first gear 25 and prevents the first gear 25 from rotating. At the same time, when the spring telescopic rod 42 is in its retracted state, the friction strip 43 does not limit the first gear 25, allowing the first gear 25 to rotate. Multiple spring telescopic rods 44 are fixed to one side of the inner cavity of the track body 1 near the fixed rack 28.

[0043] In addition, the output ends of multiple spring telescopic rods 44 are all fixed with a fixed rack 45 that is adapted to the first gear 25. A support block 46 is fixed to the upper end of the friction bar 43. A support block 47 adapted to the support block 46 is fixed to the upper end of the fixed rack 45. Multiple actuating rods 48 extending outward through the track body 1 are fixed to the upper end of the fixed rack 45. At the same time, when the spring telescopic rods 44 are in their natural state, the fixed rack 45 does not contact the first gear 25. At the junction of the support block 46 and the support block 47, the spring telescopic rod 42 is in its natural state. This further prevents the friction bar 43 from limiting the first gear 25, and the first gear 25 does not contact the fixed rack 45. This prevents the door track from being unable to be adjusted during use, thereby affecting the normal operation of the door track.

[0044] When it is necessary to adjust the spacing between multiple guide blocks 21, firstly, move multiple levers 48 to move the fixed rack 2 45 closer to the first gear 25, so that the first gear 25 meshes with the fixed rack 2 45. Then, start the drive motor 11. Through the connection between the fixed screw 13 and the fixed block, move multiple guide blocks 21 away from the drive motor 11. At the same time, due to the design of the support block 2 46 and the support block 3 47, the spring telescopic rod 1 42 is in a retracted state, so that the friction strip 43 does not limit the first gear 25. Due to the design of the cooperation between the second gear 26, the third gear 27, and the fixed rack 1 28, the rotating rod 1 24 can move away from the drive motor 11. At the same time, due to the different moving distances of the multiple guide blocks 21, the moving distances of the multiple rotating rods 1 24 are different. When the desired position is reached, release multiple levers 48.

[0045] Since the multiple rotating rods 24 are located at different positions of the matching guide blocks 21, when the drive motor 11 rotates again, the moving distance between the multiple guide blocks 21 will change when the multiple guide blocks 21 move, and further, the moving distance between the multiple door bodies can be changed.

[0046] The specific implementation of this embodiment is as follows: When the device is in use, the drive motor 11 rotates, and at the same time, due to the limiting rod 14 limiting the guide block 21, the guide block 21 can move towards the side closer to the drive motor 11 or away from the drive motor 11. The fixing screw 13 is connected to the fixing block by a thread. Also, due to the design of multiple rotating rods, multiple guide blocks 21 can move at the same time.

[0047] When it is necessary to adjust the spacing between multiple guide blocks 21, first move multiple levers 48 to move the fixed rack 2 45 to the side closer to the first gear 25. Through the mutual cooperation between the fixed rack 2 45, the first gear 25, the third gear 27, and the fixed rack 1 28, and because the moving distance between multiple guide blocks 21 is different, the moving distance of multiple rotating rods 1 24 is different. When the desired position is reached, release multiple levers 48.

[0048] When the guide block 21 moves, it can drive the door to move, so that the door can be opened and closed. At the same time, through the design of multiple guide blocks 21, multiple doors can move to different degrees during the opening and closing process, so that the distance between multiple doors can be adjusted when the door track is used.

[0049] It should be noted that the specific installation methods, circuit connection methods, and control methods of the drive motor 11, spring telescopic rod, fixing bolt 36, etc. in this invention are all conventional designs, and will not be described in detail in this invention.

[0050] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A quick-adjustable door track, comprising a track body (1), characterized in that: A drive motor (11) is fixed to one side of the shorter side of the inner cavity of the track body (1). A fixing rod (12) is fixed to the output end of the drive motor (11). A fixing screw (13) is fixed to the end of the fixing rod (12) away from the drive motor (11). Two limiting rods (14) are fixedly installed between the two shorter sides of the inner cavity of the track body (1). Multiple guiding devices (2) are slidably installed on the outer surface of the two limiting rods (14). Fixing devices (3) are provided at the four corners of the top surface of the inner cavity of the track body (1) to facilitate the installation of the door track. The fixing device (3) includes a fixing housing (31). A support groove (32) is provided on the side of the inner cavity of the fixing housing (31) near the shorter side of the track body (1). A plurality of through grooves adapted to the support groove (32) are also provided on the outer surface of the track body (1). A support block (33) is slidably installed in the inner cavity of the support groove (32). An adjusting screw (34) is threaded on the upper end of the fixing housing (31). A connecting rod (35) is fixed on the upper end of the adjusting screw (34). A fixing screw (36) is fixed on the end of the connecting rod (35) away from the adjusting screw (34). A limiting block (37) that is slidably connected to the inner surface of the fixing housing (31) is rotatably installed on the outer surface of the connecting rod (35). The guiding device (2) includes a guiding block (21) slidably connected to the two limiting rods (14). The end of the guiding block (21) away from the drive motor (11) is provided with a through groove (22) adapted to the fixed screw (13). The lower end of the guiding block (21) is provided with an installation groove (23). A rotating rod (24) is movably installed on the bottom surface of the inner cavity of the installation groove (23). A first gear (25) is fixed on the upper end of the rotating rod (24). A second gear (26) is fixed on the outer surface of the rotating rod (24). A third gear (27) meshing with the second gear (26) is movably installed on the upper end of the guiding block (21). A fixed rack (28) meshing with the third gear (27) is fixed on the upper end of the guiding block (21). An installation bracket (29) is fixed on the upper end of the guiding block (21). An adjustment mechanism (4) adapted to the first gear (25) is provided in the inner cavity of the track body (1).

2. The door track with rapid adjustment according to claim 1, characterized in that: The bottom surface of the support block (33) is inclined upward on the side near the connecting rod (35), and the top surface of the limiting block (37) is inclined downward on the side near the support block (33). The inclined surface of the support block (33) is in contact with the inclined surface of the limiting block (37). When the adjusting screw (34) is at the lowest position, the fixing screw (36) and the support block (33) are both located inside the track body (1).

3. The door track with rapid adjustment according to claim 2, characterized in that: The inner surface of the through groove (22) does not contact the fixing screw (13).

4. The door track with rapid adjustment according to claim 3, characterized in that: Rotating rod 2 is rotatably mounted on the outer surface of rotating rod 1 (24), and two adjacent rotating rods 2 are rotatably connected.

5. The door track with rapid adjustment according to claim 1, characterized in that: The guide block (21) furthest from the drive motor (11) has a fixed block that is threadedly connected to the fixing screw (13) at one end.

6. The door track with rapid adjustment according to claim 5, characterized in that: The adjustment mechanism (4) includes a fixed bracket (41) fixedly installed on the upper end of the mounting bracket (29). A spring telescopic rod (42) is fixed at one end of the fixed bracket (41) near the fixed rack (28). A friction strip (43) for limiting the first gear (25) is fixed at the output end of the spring telescopic rod (42). Multiple spring telescopic rods (44) are fixed on one side of the inner cavity of the track body (1) near the fixed rack (28). A fixed rack (45) adapted to the first gear (25) is fixed at the output end of the multiple spring telescopic rods (44). A support block (46) is fixed at the upper end of the friction strip (43). A support block (47) adapted to the support block (46) is fixed at the upper end of the fixed rack (45). Multiple actuating rods (48) extending outward through the track body (1) are fixed at the upper end of the fixed rack (45).

7. The door track with rapid adjustment according to claim 6, characterized in that: When the spring telescopic rod (42) is in its natural state, the friction strip (43) limits the first gear (25).

8. The door track with rapid adjustment according to claim 6, characterized in that: When the second spring telescopic rod (44) is in its natural state, the second fixed rack (45) does not contact the first gear (25), and the first spring telescopic rod (42) is in its natural state at the point where the second support block (46) and the third support block (47) are connected.

Citation Information

Patent Citations

  • Rolling shutter door track

    CN205063780U

  • Glass door clamping rail

    CN101812953A

  • Guide rail fixing and mounting mechanism in side sliding door

    CN219622516U