A drive device for an automatic sealing strip

Abstract

The utility model discloses a drive arrangement of automatic sealing strip, including telescopic drive shaft and positioning sleeve, telescopic drive shaft outside end is equipped with gyro wheel, and inside end is connected with sealing strip linkage mechanism, and can rotatable adjustment exposed length control sealing strip lift stroke, and positioning sleeve fixed telescopic drive shaft after adjustment prevents autorotation. The door frame can be equipped with gyro wheel introduction slope or install the slope fixed block of introduction slope with gyro wheel, realize when closing dustproof strip extension, retract when opening. The device has strong applicability, adjusts stable, and improves the sealing performance of door and window.

Description

Technical Field

[0001] This utility model relates to the technical field of door and window sealing devices, specifically to a driving device for an automatic sealing strip. Background Technology

[0002] In the field of door and window sealing, automatic dustproof strips are increasingly widely used, effectively preventing dust and debris from entering the room through gaps at the bottom of the door, thus improving indoor environmental quality. However, the telescopic drive shafts of current automatic dustproof strips on the market (such as the "top rod" structure disclosed in the utility model patent with Chinese patent announcement number CN 215169557 U, entitled "A Door Bottom Sealing Noise Reduction Structure", or the telescopic drive shaft structure disclosed in the design patent with Chinese patent announcement number CN 307363781 S, entitled "Door Bottom Sealing Strip (M036)") have many defects. First, the existing telescopic drive shafts do not have rollers, relying solely on a single telescopic drive shaft to raise and lower the door bottom sealing strip. Furthermore, this telescopic drive shaft is only suitable for installation on the hinge side of a swing door, and the telescopic drive shaft can only face the door frame direction on the hinge side. When the door closes, the end of the telescopic drive shaft retracts against the door frame, causing the bottom door seal to descend and seal the gap. This structure limits its application, making it unsuitable for doors with hinged top and bottom joints, especially those with the joints installed at a distance from the door frame. In such cases, the end of the telescopic drive shaft fails to retract against the door frame when closing and instead gets stuck on the outside of the door frame, rendering it unusable. Secondly, while the telescopic drive shaft of existing automatic dustproof strips can be adjusted via threads, it lacks a limit design, making it prone to rotation during use. This alters the adjusted sealing strip's lifting stroke, affecting the sealing effect and operational stability. Therefore, developing a more versatile drive device for automatic sealing strips that operates stably after adjustment is an urgent problem to be solved. Utility Model Content

[0003] The present invention aims to provide a novel driving device for automatic sealing strips, which solves the problems of narrow applicability of the telescopic drive shaft of existing automatic dustproof strips and easy self-rotation after adjustment, enabling the driving device to be applied to various types of doors and stably controlling the lifting and lowering stroke of the sealing strip.

[0004] The above-mentioned objective of this utility model is achieved through the following technical solution: A driving device for an automatic sealing strip includes a telescopic drive shaft and a positioning sleeve. The telescopic drive shaft is fitted into the positioning sleeve and can extend and retract. A roller is installed at one outer end of the telescopic drive shaft, and a threaded hole or screw is provided at one inner end for connection with the internal linkage mechanism of the automatic sealing strip. The threaded hole or screw connects to the screw or threaded hole of the internal linkage mechanism of the automatic sealing strip. After removing the positioning sleeve, the length of the exposed part of the telescopic drive shaft can be adjusted by rotation, thereby controlling the lifting stroke of the sealing strip. The positioning sleeve is used to fix the adjusted telescopic drive shaft and prevent it from rotating during use. The positioning sleeve is provided with a locking part, and the locking part has a screw hole, which locks the positioning sleeve onto the door leaf with screws.

[0005] Furthermore, the telescopic drive shaft is not in the shape of a perfect cylinder; it can be an elliptical cylinder, a triangular cylinder, a rectangular cylinder, or other polygonal cylinders.

[0006] Furthermore, the positioning sleeve is cylindrical, and the shape of the cylindrical hole matches the shape of the telescopic drive shaft.

[0007] Furthermore, in use, the door frame that cooperates with this utility model is provided with a roller guide slope. When the door is closed, the roller contacts the roller guide slope. Under the action of the thrust and the roller guide slope, the telescopic drive shaft is compressed, which drives the automatic dustproof strip to extend downward from the bottom of the door. When the door is opened, the roller disengages from the roller guide slope. Under the action of the reset spring of the linkage mechanism, the telescopic drive shaft pops out and resets, causing the sealing strip to retract to the bottom of the door leaf.

[0008] Furthermore, in use, a sloping fixing block is installed on the door frame that cooperates with this utility model. The sloping fixing block is provided with a roller guide sloping surface. When the door is closed, the roller contacts the roller guide sloping surface. Under the action of the thrust and the roller guide sloping surface, the telescopic drive shaft is compressed, which drives the automatic dustproof strip to extend downward from the bottom of the door. When the door is opened, the roller disengages from the roller guide sloping surface. Under the action of the reset spring of the linkage mechanism, the telescopic drive shaft pops out and resets, causing the sealing strip to retract to the bottom of the door leaf.

[0009] This drive unit has two operating modes for different door frame structures.

[0010] The first scenario involves a door frame with a built-in roller guide ramp. When the door closes, the rollers initially contact the roller guide ramp. Under the influence of the thrust and the ramp, the telescopic drive shaft is compressed, causing the automatic dustproof strip to extend downwards from the bottom of the door via an internal linkage mechanism. When the door opens, as the door rotates, the rollers, along with the telescopic drive shaft, gradually disengage from the roller guide ramp. Under the action of the reset spring in the linkage mechanism, the telescopic drive shaft pops out and resets, causing the sealing strip to retract to the bottom of the door.

[0011] The second type is where a sloping fixing block is installed on the door frame, and the sloping fixing block is equipped with a roller to guide the sloping surface. Its working principle is similar to the above. When the door is closed, the roller contacts the roller to guide the sloping surface, compresses the telescopic drive shaft and drives the dustproof strip to extend. When the door is opened, the roller disengages from the sloping surface, the telescopic drive shaft resets and drives the dustproof strip to retract.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. Wide applicability: By installing rollers on the outside of the telescopic drive shaft, the working method of the traditional drive shaft is changed, making it no longer limited to specific types of doors. It is not only suitable for swing doors, but also for doors with top and bottom hinges installed, including doors with top and bottom hinges installed at a certain distance from the door frame, effectively expanding the application range of the automatic sealing strip drive device.

[0013] 2. Stable adjustment: The positioning sleeve and locking part are set up. After adjusting the length of the telescopic drive shaft, the positioning sleeve can be locked to the door leaf with screws to fix the telescopic drive shaft and prevent it from rotating during use. This ensures the stability of the sealing strip lifting stroke, thereby improving the sealing effect and the reliability of the drive device. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of one side of this utility model.

[0015] Figure 2 This is a three-dimensional structural diagram of the other side of this utility model.

[0016] Figure 3 This is a three-dimensional structural diagram of Embodiment 1 of this utility model.

[0017] Figure 4 This is an exploded structural diagram of Embodiment 1 of this utility model.

[0018] Figure 5 This is a three-dimensional structural diagram of Embodiment 2 of this utility model.

[0019] Figure 6 This is an exploded structural diagram of Embodiment 2 of this utility model. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] Example 1 (Door frame with built-in rollers guiding the inclined surface): like Figure 1-4As shown, the driving device of the automatic sealing strip in this embodiment includes a telescopic drive shaft 1 and a positioning sleeve 2. The telescopic drive shaft 1 is movably telescopically fitted into the positioning sleeve 2. The telescopic drive shaft 1 is square columnar, and correspondingly, the positioning sleeve 2 is square cylindrical. The telescopic drive shaft 1 is made of high-strength stainless steel, and a rubber roller 3 is installed at one end of its outer side. The roller 3 has a diameter of 30mm, has good wear resistance and shock absorption, and can roll smoothly when in contact with the door frame. An M8 threaded hole 4 is provided at one end of the telescopic drive shaft 1 for connecting with the screw of the internal linkage mechanism of the automatic sealing strip. The positioning sleeve 2 is made of aluminum alloy or plastic, and a locking part 201 is provided at one end of the positioning sleeve 2 for easy fixing to the door leaf. The locking part 201 has two symmetrically distributed screw holes 202, and the screw holes 202 are M5.

[0022] During installation, first install the automatic sealing strip into the mounting groove at the bottom of the door leaf, ensuring the strip is securely installed and can extend and retract smoothly. Then, connect the threaded hole of the telescopic drive shaft 1 to the screw of the internal linkage mechanism of the automatic sealing strip, and adjust it to the appropriate length. Next, place the positioning sleeve 2 onto the telescopic drive shaft 1, aligning the locking part 201 of the positioning sleeve 2 with the pre-marked installation position on the door leaf. Use an M5 screw to pass through the screw hole 202 to lock the positioning sleeve 2 to one end of the door leaf side. After installation, check whether the telescopic drive shaft 1 rotates freely and whether the positioning sleeve 2 is securely fixed.

[0023] Working process: When the door is closed, as the door leaf gradually approaches the door frame, the roller 3 on the outer side of the telescopic drive shaft 1 begins to contact the roller guide slope 6 on the door frame 5. Under the pushing force of the door leaf and the guidance of the roller guide slope 6, the roller 3 rolls along the slope, simultaneously pushing the telescopic drive shaft 1 to compress inwards towards the door leaf. The compression of the telescopic drive shaft 1 is transmitted through the internal linkage mechanism, causing the automatic dustproof strip to extend downwards from the bottom of the door until the bottom gap is completely sealed. When the door is opened, the door leaf rotates, and the roller 3, along with the telescopic drive shaft 1, gradually disengages from the roller guide slope 6. At this time, under the action of the return spring inside the linkage mechanism, the telescopic drive shaft 1 pops out and resets, causing the sealing strip to retract to the bottom of the door leaf, completing one dustproof sealing cycle.

[0024] Adjustment process: To adjust the height of the sealing strip extension, first loosen the screws on the positioning sleeve 2 with a screwdriver and remove the positioning sleeve 2. At this point, the telescopic drive shaft 1 can rotate freely 360°. Rotating the telescopic drive shaft 1 clockwise shortens its exposed portion, causing the sealing strip to be pushed out less through the linkage mechanism; rotating it counterclockwise lengthens its exposed portion, increasing the extension range of the sealing strip. After adjustment, rotate the roller 3 to a horizontal position to ensure it can properly contact the door frame roller guide slope 6 during subsequent use. Then, reinstall the positioning sleeve 2 and secure it with screws. The telescopic drive shaft 1 is now positioned and will not rotate during use.

[0025] Example 2 (Door frame mounting inclined fixing block): like Figure 1-2 and Figure 5-6 As shown, the basic structure of the automatic sealing strip drive device in this embodiment is the same as that in Embodiment 1. The telescopic drive shaft 1 is also made of high-strength stainless steel, with a 30mm rubber roller 3 installed on the outside and an M8 threaded hole on the inside. The positioning sleeve 2 is also an aluminum alloy hexagonal cylindrical shape, and the locking part 201 has two M5 screw holes 202. The difference is that an inclined fixing block 7 is installed on the door frame. The inclined fixing block 7 is made of engineering plastic and is a right trapezoid in shape. The inclined fixing block 7 is provided with a roller guide inclined surface 6.

[0026] During installation, first install the automatic sealing strip at the bottom of the door leaf, then connect the telescopic drive shaft 1 to the internal linkage mechanism of the automatic sealing strip. Next, install and lock the positioning sleeve 2 on the side of the door leaf. Finally, use screws to securely install the inclined fixing block 7 at the corresponding position on the door frame, ensuring that the roller guide of the inclined fixing block 7 onto the inclined surface 6 is opposite to the closing direction of the door leaf, and that the height of the roller guide onto the inclined surface 6 matches the height of the roller 3 on the telescopic drive shaft 1.

[0027] Working process: When the door is closed, roller 3 contacts the inclined surface fixing block 7 and the roller guide 6. Under the pushing force of the door leaf, roller 3 rolls along the groove of the inclined surface, pushing the telescopic drive shaft 1 to compress. Through the linkage mechanism, the automatic dustproof strip extends from the bottom of the door through the sealing gap. When the door is opened, roller 3 disengages from the inclined surface. Under the action of the return spring, the telescopic drive shaft 1 returns to its original position, and the sealing strip retracts.

[0028] Adjustment process: Similar to Example 1, loosen the screws of the positioning sleeve 2, remove the positioning sleeve 2, rotate the telescopic drive shaft 1 to adjust its length, control the extension height of the sealing strip, after adjustment, rotate the roller 3 to the horizontal direction, and re-fix the positioning sleeve 2 to prevent the telescopic drive shaft 1 from rotating on its own.

[0029] In summary, the novel automatic sealing strip driving device of this utility model, through innovative design, effectively solves the shortcomings of the existing technology and has good market application prospects and promotion value.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A driving device for an automatic sealing strip, characterized in that: It includes a telescopic drive shaft and a positioning sleeve. The telescopic drive shaft is fitted into the positioning sleeve and can extend and retract. A roller is installed on one outer end of the telescopic drive shaft, and a threaded hole or screw is provided on the inner end to connect with the internal linkage mechanism of the automatic sealing strip. The threaded hole or screw is connected to the screw or threaded hole of the internal linkage mechanism of the automatic sealing strip.

2. The automatic sealing strip driving device according to claim 1, characterized in that: The positioning sleeve is provided with a locking part, and the locking part is provided with a screw hole, so that the positioning sleeve can be locked to the door leaf by screws.

3. The automatic sealing strip driving device according to claim 1, characterized in that: The telescopic drive shaft is in the shape of an elliptical cylinder, a triangular cylinder, or a rectangular cylinder.

4. The automatic sealing strip driving device according to claim 1, characterized in that: The positioning sleeve is cylindrical, and the shape of the cylinder hole matches the shape of the telescopic drive shaft.

5. The automatic sealing strip driving device according to claim 1, characterized in that: The door frame is equipped with roller guide ramps.

6. The automatic sealing strip driving device according to claim 1, characterized in that: An inclined plane fixing block is installed on the door frame, and the inclined plane fixing block is equipped with rollers to guide the inclined plane.

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