Driving device of automatic sealing strip

Abstract

The invention discloses an automatic sealing strip driving device which comprises a telescopic driving shaft and a positioning sleeve, a roller is arranged at the outer side end of the telescopic driving shaft, the inner side end of the telescopic driving shaft is connected with a sealing strip linkage mechanism, the telescopic driving shaft can rotatably adjust the exposed length to control the lifting stroke of a sealing strip, and the positioning sleeve fixes the adjusted telescopic driving shaft to prevent autorotation. The door frame can be provided with a roller guide-in inclined plane or provided with an inclined plane fixing block with the roller guide-in inclined plane, so that the dustproof strip extends out when the door is closed and retracts back when the door is opened. The device is high in applicability and stable in adjustment, and the sealing performance of doors and windows is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of door and window sealing devices, and particularly to a driving device for an automatic sealing strip. Background Art

[0002] In the field of door and window sealing, the application of automatic dust-proof strips is becoming more and more widespread. It can effectively prevent dust, sundries, etc. from entering the room through the bottom gap of the door, improving the indoor environmental quality. However, there are many defects in the telescopic drive shafts of the current automatic dust-proof strips (such as the "push rod" structure disclosed in the utility model patent with the Chinese patent publication number CN 215169557 U and the name "A bottom door sealing and noise reduction structure", or the telescopic drive shaft structure disclosed in the design patent with the Chinese patent publication number CN 307363781 S and the name "Bottom door sealing strip (M036)"). Firstly, the existing telescopic drive shafts do not have rollers. Only a telescopic drive shaft is relied on to drive the bottom door sealing strip to rise and fall, and this telescopic drive shaft is only suitable for being installed on the hinge side of a side-hung door, and the telescopic drive shaft can only face the door frame direction on the side where the hinge is located. When closing the door, the end of the telescopic drive shaft abuts against the door frame and contracts, thereby driving the bottom door sealing strip to descend to seal the bottom gap of the door. This structure results in a limited scope of use and is not applicable to doors with floor and ceiling hinges, especially floor and ceiling hinge doors with the floor and ceiling hinges installed at a certain distance from the door frame. In this case, the end of the telescopic drive shaft cannot abut against the door frame and contract when closing the door, but will get stuck outside the door frame and cannot be used normally. Secondly, although the telescopic drive shafts of the existing automatic dust-proof strips can be adjusted by threads, they lack a limit design and are prone to self-rotation during use, resulting in a change in the lifting stroke of the adjusted sealing strip, affecting the sealing effect and use stability. Therefore, it has become an urgent problem to develop a driving device for an automatic sealing strip with a wider applicability and stable operation after adjustment. Summary of the Invention

[0003] The present invention aims to provide a novel driving device for an automatic sealing strip, solve the problems of narrow applicability and easy self-rotation after adjustment of the telescopic drive shafts of the existing automatic dust-proof strips, realize the application of the driving device on various types of doors, and be able to stably control the lifting stroke of the sealing strip.

[0004] The above object of the present invention is achieved by the following technical solution: An automatic seal strip driving device includes a telescopic drive shaft and a positioning sleeve. The telescopic drive shaft is sleeved in the positioning sleeve and can move telescopically. A roller is installed at one outer end of the telescopic drive shaft, and a threaded hole or a screw rod connected to the internal linkage mechanism of the automatic seal strip is provided at one inner end. It is connected to the screw rod or threaded hole of the internal linkage mechanism of the automatic seal strip through this structure. After removing the positioning sleeve, the length of the exposed part of the telescopic drive shaft can be adjusted by rotation, so as to control the lifting stroke of the seal strip. The positioning sleeve is used to fix the adjusted telescopic drive shaft to prevent it from rotating during use. The positioning sleeve is provided with a locking part, and a screw hole is provided on the locking part. The positioning sleeve is locked on the door leaf by screws.

[0005] Further, the telescopic drive shaft has a non-regular cylindrical shape, which can be an elliptical cylindrical shape, a triangular cylindrical shape, a rectangular cylindrical shape or other polygonal cylindrical shapes.

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

[0007] Further, a roller guiding slope is provided on the door frame. When closing the door, the roller contacts the roller guiding slope. Under the action of the thrust and the roller guiding slope, the telescopic drive shaft is compressed, driving the automatic dust-proof strip to extend downward from the bottom of the door. When opening the door, the roller disengages from the roller guiding slope, and under the action of the return spring of the linkage mechanism, the telescopic drive shaft pops out and resets, causing the seal strip to retract into the bottom of the door leaf.

[0008] Further, an inclined surface fixing block is installed on the door frame. The inclined surface fixing block is provided with a roller guiding slope. When closing the door, the roller contacts the roller guiding slope. Under the action of the thrust and the roller guiding slope, the telescopic drive shaft is compressed, driving the automatic dust-proof strip to extend downward from the bottom of the door. When opening the door, the roller disengages from the roller guiding slope, and under the action of the return spring of the linkage mechanism, the telescopic drive shaft pops out and resets, causing the seal strip to retract into the bottom of the door leaf.

[0009] For different door frame structures, this driving device has two working modes.

[0010] The first is the case where the door frame has a roller guiding slope by itself. When closing the door, the roller starts to contact the roller guiding slope. Under the action of the thrust and the roller guiding slope, the telescopic drive shaft is compressed, and through the internal linkage mechanism, the automatic dust-proof strip is driven to extend downward from the bottom of the door. When opening the door, during the rotation of the door leaf, the roller together with the telescopic drive shaft gradually disengages from the roller guiding slope. Under the action of the return spring of the linkage mechanism, the telescopic drive shaft pops out and resets, causing the seal strip to retract into the bottom of the door leaf.

[0011] The second case is that a bevel fixing block is installed on the door frame, and a roller guiding bevel is provided on the bevel fixing block. Its working principle is similar to the above. When closing the door, the roller contacts the roller guiding bevel, compresses the telescopic drive shaft to drive the dust-proof strip to extend. When opening the door, the roller disengages from the bevel, and the telescopic drive shaft resets to drive the dust-proof strip to retract.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Strong applicability: By installing rollers outside the telescopic drive shaft, the working mode of the traditional drive shaft is changed, making it no longer limited to a specific type of door. It is applicable not only to swing doors but also to doors installed with overhead and floor pivots, including overhead and floor pivot doors with the overhead and floor pivots installed at a certain distance from the door frame, effectively expanding the application range of the automatic seal strip drive device.

[0013] 2. Stable adjustment: The positioning sleeve and locking part are provided. After adjusting the length of the telescopic drive shaft, the positioning sleeve can be locked on the door leaf by screws to fix the telescopic drive shaft, preventing it from rotating during use, ensuring the stability of the lifting stroke of the seal strip, thereby improving the sealing effect and the reliability of the drive device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a perspective structural schematic diagram of one side of the present invention.

[0015] Figure 2 is a perspective structural schematic diagram of the other side of the present invention.

[0016] Figure 3 is a perspective structural schematic diagram of Embodiment 1 of the present invention.

[0017] Figure 4 is an exploded structural schematic diagram of Embodiment 1 of the present invention.

[0018] Figure 5 is a perspective structural schematic diagram of Embodiment 2 of the present invention.

[0019] Figure 6 is an exploded structural schematic diagram of Embodiment 2 of the present invention. DETAILED DESCRIPTION OF THE INVENTION

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

[0021] Embodiment 1 (the door frame is equipped with a roller guiding bevel): As Figure 1-4As shown in the figure, 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 telescoped in the positioning sleeve 2. The telescopic drive shaft 1 is square columnar. Correspondingly, the positioning sleeve 2 is square tubular. The telescopic drive shaft 1 is made of high-strength stainless steel. A roller 3 made of rubber is installed at one outer end. The diameter of the roller 3 is 30 mm, which has good wear resistance and shock absorption and can roll smoothly when contacting the door frame. A threaded hole 4 with M8 specification is provided at one inner end of the telescopic drive shaft 1 for connecting with the screw rod of the internal linkage mechanism of the automatic sealing strip. The positioning sleeve 2 is made of aluminum alloy or plastic. A locking part 201 is provided at one end of the positioning sleeve 2, which is convenient for fixing on the door leaf. Two symmetrically distributed screw holes 202 are provided on the locking part 201, and the specification of the screw holes 202 is M5.

[0022] During installation, first install the automatic sealing strip in the installation groove at the bottom of the door leaf to ensure that the sealing strip is firmly installed and can be telescoped smoothly. Then connect the threaded hole of the telescopic drive shaft 1 with the screw rod of the internal linkage mechanism of the automatic sealing strip and adjust it to the appropriate length. Next, put the positioning sleeve 2 on the telescopic drive shaft 1, make the locking part 201 of the positioning sleeve 2 correspond to the pre-marked installation position on the door leaf, and use M5 screws to pass through the screw holes 202 to lock the positioning sleeve 2 at one end of the side of the door leaf. After installation, check whether the telescopic drive shaft 1 rotates flexibly and whether the positioning sleeve 2 is firmly fixed.

[0023] Working process: When closing the door, 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 guiding slope 6 provided on the door frame 5. Under the pushing force of the door leaf and the guiding action of the roller guiding slope 6, the roller 3 rolls along the slope and at the same time pushes the telescopic drive shaft 1 to compress towards the inside of the door leaf. The compression of the telescopic drive shaft 1 is transmitted through the internal linkage mechanism, driving the automatic dust-proof strip to extend downward from the bottom of the door until the bottom gap of the door is completely sealed. When opening the door, the door leaf rotates, and the roller 3 together with the telescopic drive shaft 1 gradually disengages from the roller guiding 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, driving the sealing strip to retract into the bottom of the door leaf, completing a dust-proof sealing action cycle.

[0024] Adjustment process: If it is necessary to adjust the height of the sealing strip protruding, first use a screwdriver to loosen the screw on the positioning sleeve 2 and remove the positioning sleeve 2. At this time, the telescopic drive shaft 1 can be freely rotated and adjusted by 360°. When the telescopic drive shaft 1 is rotated clockwise, its exposed part becomes shorter, and the amplitude of the sealing strip pushed out by the linkage mechanism becomes smaller; when the telescopic drive shaft 1 is rotated counterclockwise, its exposed part becomes longer, and the amplitude of the sealing strip pushed out becomes larger. After the adjustment is completed, turn the roller 3 to the horizontal direction to ensure that the roller 3 can normally contact the roller guiding slope 6 of the door frame roller during subsequent use, and then reinstall the positioning sleeve 2 and fix it with screws. At this time, the telescopic drive shaft 1 is positioned and will not rotate automatically during use.

[0025] Embodiment 2 (Installation of inclined plane fixing block on the door frame): As Figure 1-2 And Figure 5-6 shown, the basic structure of the driving device of the automatic sealing strip 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 provided on the inside; the positioning sleeve 2 is also an aluminum alloy hexagonal cylinder, and the locking part 201 has two M5 screw holes 202. The difference is that an inclined plane fixing block 7 is installed on the door frame. The inclined plane fixing block 7 is made of engineering plastic and has a right trapezoidal shape. The inclined plane fixing block 7 is provided with a roller guiding slope 6.

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

[0027] Working process: When closing the door, the roller 3 contacts the roller guiding slope 6 of the inclined plane fixing block 7. Under the thrust of the door leaf, the roller 3 rolls along the inclined plane groove, pushing the telescopic drive shaft 1 to compress, and through the linkage mechanism, the automatic dust-proof strip extends from the bottom of the door to seal the gap. When opening the door, the roller 3 disengages from the inclined plane, and under the action of the return spring, the telescopic drive shaft 1 resets and the sealing strip retracts.

[0028] Adjustment process: Similar to Embodiment 1, loosen the screw of the positioning sleeve 2, remove the positioning sleeve 2, then rotate the telescopic drive shaft 1 to adjust its length, control the height of the sealing strip protruding, and after the adjustment is completed, turn the roller 3 to the horizontal direction and refix the positioning sleeve 2 to prevent the telescopic drive shaft 1 from rotating automatically.

[0029] In summary, through innovative design, the driving device of the novel automatic sealing strip of the present invention effectively solves the deficiencies of the prior art and has good market application prospects and promotion value.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention 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 sleeved in the positioning sleeve and can move telescopically. A roller is installed at one outer end of the telescopic drive shaft, and a threaded hole or a screw rod connected to the internal linkage mechanism of the automatic sealing strip is provided at one inner end. It is connected to the screw rod or the threaded hole of the internal linkage mechanism of the automatic sealing strip through this structure.

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

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

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

5. The driving device of an automatic sealing strip according to claim 1, characterized in that: A roller guiding slope is provided on the door frame.

6. The driving device of an automatic sealing strip according to claim 1, characterized in that: An inclined plane fixing block is installed on the door frame, and a roller guiding slope is provided on the inclined plane fixing block.

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