Door buffer device, door assembly with a buffer device

Abstract

A door buffer device and a door assembly with a buffer device are characterized in that the door buffer device includes a buffer, which is embedded in one of the door leaf and the door frame. The door buffer device includes a stop block, which is installed in the other of the door leaf and the door frame. The beneficial technical effects of the present invention are as follows: First, since the connecting plate is threadedly connected to a pair of adjusting screws, the position of the connecting plate can be adjusted by turning the adjusting screws, thereby adjusting the compression of the elastic drive element. Second, since the top hammer can extend and retract on the clearance opening, and the screw head is located in front of the front plate, that is, both the top hammer and the screw head are exposed in front of the front plate, after the buffer is installed on the door leaf or the door frame, there is sufficient operating space in front of the front plate for easy adjustment of the adjusting screws by hand and tools, thereby allowing convenient adjustment of the compression of the elastic drive element by turning the adjusting screws.

Description

Technical Field

[0001] This invention relates to a door buffer device and a door assembly with a buffer device. Background Technology

[0002] Doors can be categorized into hinged doors and sliding doors based on their opening and closing motion. Regardless of type, during closing, excessive force can sometimes cause the door to slam against the door frame, generating significant noise, damaging the frame, and potentially injuring or injuring objects or people accidentally placed between the door and frame (or behind the door). Therefore, to improve door safety, buffer devices are typically installed on the door. For example, Chinese Patent CN201920672154.3 discloses a novel steel insulated fireproof door, comprising a door frame and a door leaf. The door leaf is located inside the door frame and is movably connected to the door frame via fireproof hinges. A buffer device is connected between the door leaf and the door frame near the inner side, and a fixing groove matching the buffer device is provided on the outer surface of the door frame. The buffer device consists of a fixed post, a movable post, a buffer head, and a buffer spring. The fixed post is fixed inside the door leaf, the bottom end of the movable post is embedded inside the fixed post, the buffer head is fixed to the top end of the movable post, and one end of the buffer spring is fixed to the bottom end of the movable post and the other end is fixed to the inner wall of the fixed post. The buffer head is movably connected to the fixed post through the movable post and the buffer spring. When the door leaf closes with the door frame, the buffer head moves relative to the fixed post through the movable post, the buffer spring, and the fixed post, allowing the buffer head to embed into the fixed groove, thus providing a buffering effect when the door leaf closes and offering some protection to the door leaf. However, if the weight of the door leaf exceeds the range that the buffer device can offset, the door leaf will still hit the door frame hard. Therefore, different specifications of the buffer device are required for door leaves of different weights, resulting in poor versatility of the buffer device. To address the aforementioned technical deficiencies, Chinese Patent CN201010177128.7 discloses an adjustable door closer, comprising a housing, a piston and an adjusting nut within the housing, and a spring positioned between the piston and the adjusting nut. The adjusting nut is mounted on an adjusting bolt. A retaining ring is provided at the front end of the adjusting bolt to prevent the adjusting nut from disengaging. Rotating the adjusting bolt controls the forward and backward movement of the adjusting nut, thereby adjusting the spring's compression rate and varying the closing force. However, after installing the adjustable door closer onto the door, adjusting the spring's compression rate by hand using a tool to turn the adjusting bolt is extremely difficult due to the bolt's proximity to the door, leaving very limited operating space for the hand and tool. Summary of the Invention

[0003] To address the shortcomings of existing technologies, one of the objectives of this invention is to improve the structure of a door buffer device, enabling convenient adjustment of the buffering force even when it is in the installed state. Therefore, this invention proposes a door buffer device, comprising a buffer, the buffer including a mounting base for mounting to one of a door leaf and a door frame, a pusher that can telescopically move on the mounting base and push against the other of the door leaf and door frame, an elastic drive member capable of driving the pusher, and an adjuster capable of adjusting the compression of the elastic drive member; characterized in that the mounting base includes a front plate, the front plate having a clearance opening for avoiding the pusher, the pusher being telescopically movable on the clearance opening; the adjuster includes a pair of adjusting screws and a connecting plate, the adjusting screws including a screw head and a screw rod, the screw rod extending through the front plate to the rear of the front plate, while the screw head remains at the front of the front plate, the connecting plate being threadedly connected to the screw rod of the pair of adjusting screws, and the elastic drive member pressing against the connecting plate and the pusher.

[0004] The top hammer is mounted on the mounting base, which can be selectively mounted on the door leaf or the door frame. When the mounting base is mounted on the door leaf, the top hammer can push against the door frame to automatically open the door leaf to a certain extent or reduce the impact force generated when the door leaf hits the door frame when it opens. When the mounting base is mounted on the door frame, the same technical effect can be achieved.

[0005] The elastic drive component can be a spring, silicone, or other component that can be compressed and deformed under pressure and store energy, and release energy and return to its original shape after the pressure is removed.

[0006] The connecting plate is threadedly connected to a pair of adjusting screws. The elastic drive member presses against the connecting plate and the top hammer. Thus, by turning the adjusting screws, the connecting plate can be moved back and forth along the screw, adjusting the distance between the connecting plate and the top hammer, thereby adjusting the compression of the elastic drive member.

[0007] According to the above technical solution, compared with the prior art, the beneficial technical effects of the present invention are as follows: First, since the connecting plate is threadedly connected to the pair of adjusting screws, the position of the connecting plate can be adjusted by turning the adjusting screws, thereby adjusting the compression of the elastic drive member. Furthermore, the pair of adjusting screws helps improve the stability of the connecting plate, making it less prone to loosening under long-term pressure from the elastic drive member. Second, since the top hammer can extend and retract on the clearance opening, and the screw head is positioned in front of the front plate, meaning both the top hammer and the screw head are exposed in front of the front plate, after the buffer is installed on the door leaf or door frame, there is sufficient operating space in front of the front plate for easy adjustment of the adjusting screws by hand and tools, thus allowing convenient adjustment of the compression of the elastic drive member by turning the adjusting screws.

[0008] A further technical solution could be that the regulator also includes a pair of limiting sleeves respectively fitted onto the pair of screws, the limiting sleeves being located between the front plate and the connecting plate. In this way, the limiting sleeves determine the extreme position of the connecting plate's forward movement, thereby controlling the maximum compression of the elastic drive member.

[0009] A further technical solution could be that the mounting base also includes a barrel-shaped housing, with the front plate covering the opening of the housing. The screw extends through the front plate into the housing, and the connecting plate is housed within the housing. The gap between the tail of the screw and the bottom wall of the housing is greater than zero but less than the thickness of the connecting plate. This not only prevents the bottom wall from rubbing against the screw and hindering its rotation but also prevents the connecting plate from moving backward and detaching from the screw.

[0010] A further technical solution could be that the adjuster also includes a tail rod, which is connected to the back of the top hammer, and the connecting plate has a through hole to avoid the tail rod. The tail rod may be an integral part of the top hammer, or it may be a separate structure fixedly connected to the back of the top hammer.

[0011] A further technical solution could be that the elastic drive element is a compression spring, which is sleeved on the tail rod.

[0012] A further technical solution could be that the buffer also includes a decorative cover that can be detachably mounted on the mounting base. This decorative cover conceals the screw head but has a cover hole through which the top hammer can pass. In this way, the decorative cover reduces the exposure of the screw head, achieving both an aesthetic effect and protection for the screw head.

[0013] A further technical solution could be that the buffer also includes fastening screws for securing the mounting base to one of the door leaf and the door frame.

[0014] A further technical solution could include a stop block for mounting on another part of the door leaf and door frame, the stop block being used to block the impact of the damper's top hammer. In this way, the stop block and the top hammer are placed separately on the door leaf or door frame, and the top hammer will strike the stop block when the door is closed. The stop block can be made of soft materials such as plastic or silicone to reduce the noise generated when struck by the top hammer.

[0015] In addition, the present invention also proposes a door assembly with a buffer device, the door assembly including a door leaf and a door frame, characterized in that it includes a door buffer device as described in any one of claims 1 to 8, the door buffer device including a buffer, the buffer being fitted into one of the door leaf and the door frame.

[0016] A further technical solution could be that the door buffer device includes a stop block, which is installed on another part of the door leaf and door frame.

[0017] Because of the above-mentioned features and advantages, the present invention can be applied to door buffer devices and door assemblies with buffer devices. Attached Figure Description

[0018] Figure 1 This is a cross-sectional structural diagram of a door assembly with a buffer device that applies the technical solution of this invention;

[0019] Figure 2 This is a schematic diagram of the exploded structure of the buffer. Detailed Implementation

[0020] The structure of the door buffer device and the door assembly with the buffer device, which apply the technical solution of the present invention, will be further described below with reference to the accompanying drawings. Except where explicitly stated that they are equivalent or alternative embodiments, the various implementation details disclosed below may be selectively applied or combined in one embodiment even if they are not directly related or synergistic in function.

[0021] like Figure 1 and Figure 2As shown, the present invention proposes a door buffer device, including a buffer 100. The buffer 100 includes a mounting base 1 for mounting to one of door leaf A and door frame B (in this embodiment, the mounting base 1 is mounted on door leaf A), a push hammer 3 capable of telescopically moving back and forth on the mounting base 1 and pushing the other of door leaf A or door frame B (in this embodiment, the push hammer 3 can push the door frame B), an elastic drive member 6 for driving the push hammer 3 to move, and an adjuster for adjusting the compression of the elastic drive member 6.

[0022] The mounting base 1 includes a separate front plate 12 and a barrel-shaped housing 10. The housing 10 has a peripheral wall 16 and a bottom wall 11, which together form an inner cavity. A recessed platform 15 is provided at the opening of the housing 10, and the front plate 12 is recessed into the platform 15 to cover the opening. The front plate 12 has a clearance opening (not marked in the figure, obscured by the hammer 3) to allow the hammer 3 to extend and retract through the clearance opening and out of the inner cavity.

[0023] The adjuster includes a pair of adjusting screws 4 and a connecting plate 5. Each adjusting screw 4 includes a screw head 41 and a screw rod 42. The screw rod 42 passes through the front plate 12, extends to the rear of the front plate 12, and then into the seat housing 10. The screw head 41 is positioned at the front of the front plate 12 (when the door is closed, the front of the front plate 12 faces the door frame B). The connecting plate 5 is housed within the seat housing 10 and threadedly connected to the screw rods 42 of the adjusting screws 4. The gap H between the tail of the screw rod 42 and the bottom wall 11 of the seat housing 10 is greater than zero but less than the thickness of the connecting plate 5. The adjuster also includes a pair of limiting sleeves 7 respectively fitted onto the pair of screw rods 42. The limiting sleeves 7 are located between the front plate 12 and the connecting plate 5. The elastic drive member 6 presses against the connecting plate 5 and the top hammer 3. Furthermore, the regulator also includes a tail rod 30, which is connected to the back of the top hammer 3. The connecting plate 5 has a through hole to avoid the tail rod 30. The elastic drive member 6 is a compression spring, which is sleeved on the tail rod 30. When the pair of screws 42 are turned simultaneously in the forward and reverse directions, the connecting plate 5 will move back and forth along the screws 42, adjusting the distance between the connecting plate 5 and the top hammer 3, thereby adjusting the compression amount of the elastic drive member 6. When the connecting plate 5 moves forward and abuts against the limiting sleeve 7, the connecting plate 5 can no longer move forward, and the elastic drive member 6 reaches its maximum compression amount. When the connecting plate 5 moves backward and abuts against the bottom wall 11 of the barrel, the connecting plate 5 can no longer move backward or disengage from the screws 42, and the elastic drive member 6 reaches its minimum compression amount. When assembling the buffer 100, the top hammer 3, the front plate 12, and the adjuster are assembled together before being installed onto the seat housing 10.

[0024] Furthermore, the buffer 100 also includes a decorative cover 8 that can be detachably mounted on the mounting base 1. The decorative cover 8 conceals the screw head 41 but has a cover hole 80 through which the top hammer 3 can pass. Thus, the decorative cover 8 reduces the exposure of the screw head 41, providing both aesthetic appeal and protection. Additionally, the buffer 100 includes a fastening screw 13 that passes through the front plate 12 and the base housing 10 to secure the mounting base 1 to the door leaf A. A first washer 14 is fitted onto the fastening screw 13, making the decorative cover 8 substantially flush with the outer surface of the door leaf A.

[0025] The buffer 100 further includes a stop block 9 for mounting on another door leaf A and door frame B, and arranged opposite to the top hammer 3 of the buffer 100. The stop block 9 is used to resist the impact of the top hammer 3 of the buffer 100. In this embodiment, the stop block 9 is mounted on the door frame B. Thus, the stop block 9 and the top hammer 3 are placed on the door leaf A or door frame B respectively, and the top hammer 3 will strike the stop block 9 when the door is closed. The stop block 9 can be made of soft materials such as plastic or silicone, which can reduce the noise generated when the top hammer 3 strikes the stop block 9. A second pad 91 is also provided on the back of the stop block 9, and a screw 92 passes through the stop block 9 and the second pad 91 in sequence to lock it onto the door frame B.

[0026] Furthermore, this invention also proposes a door assembly with a buffer device, the door assembly including a door leaf A and a door frame B, characterized in that it includes the door buffer device, the door buffer device including a buffer 100, the buffer 100 being embedded in the door leaf A. The door buffer device includes a stop block 9, the stop block 9 being installed on the door frame B. In this embodiment, the door leaf A and the door frame B are hinged together, and the buffer 100 and the stop block 9 are installed on the side where the door leaf A and the door frame B are hinged. When closing the door, the top hammer 3 impacts the stop block 9, the stop block 9 retracts and compresses the elastic drive member 6, the elastic drive member 6 contracts and deforms to store energy and buffer the impact force; when opening the door, the elastic drive member 6 returns to its original shape while releasing energy to push the top hammer 3 forward, the forward-moving top hammer 3 abuts against the stop block 9, driving the door leaf A to automatically open by about 30 degrees.

Claims

1. A door buffer device, comprising a buffer, the buffer including a mounting base for mounting to one of a door leaf and a door frame, a pusher capable of retracting and extending on the mounting base to push against the other of the door leaf and door frame, an elastic drive member capable of driving the pusher to move, and an adjuster capable of adjusting the compression of the elastic drive member; characterized in that, The mounting base includes a front plate with a clearance opening for the top hammer, which is retractable and extendable within the clearance opening. The adjuster includes a pair of adjusting screws and a connecting plate. Each adjusting screw has a head and a rod, with the rod extending through the front plate to the rear of the front plate and the head remaining at the front of the front plate. The connecting plate is threadedly connected to the rods of the adjusting screws. The elastic drive member presses against the connecting plate and the top hammer. The regulator also includes a pair of limiting sleeves respectively fitted onto the pair of screws, the limiting sleeves being located between the front plate and the connecting plate; The mounting base also includes a barrel-shaped housing, the front plate covers the opening of the housing, the screw passes through the front plate and extends into the housing, the connecting plate is housed within the housing, and the gap between the tail of the screw and the bottom wall of the housing is greater than zero but less than the thickness of the connecting plate.

2. The door buffer device according to claim 1, characterized in that, The adjuster also includes a tail rod, which is connected to the back of the top hammer, and the connecting plate is provided with a through hole to avoid the tail rod.

3. The door buffer device according to claim 2, characterized in that, The elastic drive component is a compression spring, which is sleeved on the tail rod.

4. The door buffer device according to claim 1, characterized in that, The buffer also includes a decorative cover that can be detachably mounted on the mounting base, the decorative cover concealing the screw head but having a cover hole through which the top hammer can pass.

5. The door buffer device according to claim 1, characterized in that, The buffer also includes fastening screws for securing the mounting base to one of the door leaf and the door frame.

6. The door buffer device according to claim 1, characterized in that, It also includes a stop for mounting to another of the door leaf and door frame, the stop for resisting the impact of the top hammer of the buffer.

7. A door assembly with a buffer device, the door assembly comprising a door leaf and a door frame, characterized in that, The device includes a door buffer as described in any one of claims 1 to 6, the door buffer comprising a buffer that is fitted onto one of the door leaf and the door frame.

8. The door assembly with a buffer device according to claim 7, characterized in that, The door buffer device includes a stop block, which is installed on another part of the door leaf and door frame.

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