Delayed unlocking mechanism and floor spring

Abstract

The invention discloses a delayed unlocking mechanism which comprises a shell, a one-way damper and a two-way damper. A first piston rod of the one-way damper is sleeved with a first compression spring, and a second piston rod of the two-way damper is sleeved with a second compression spring. A linkage shaft is arranged at the end of the first piston rod, an inclined groove is formed in the end of the second piston rod, and the end of the linkage shaft faces the second piston rod and is matched with the inclined groove. The first compression spring drives the first piston rod to quickly move outwards, and the linkage shaft slides along the chute to drive the first piston rod to rotate, close an oil passing hole of the one-way damper and lock the first piston rod; the second compression spring overcomes the resistance of the two-way damper to push the second piston rod to slowly move outwards, so that the linkage shaft reversely slides along the chute to drive the first piston rod to reversely rotate, an oil passing hole of the one-way damper is opened, and locking of the first piston rod is relieved; and the delayed unlocking time exists, so that the delayed unlocking effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of door and window installation accessories technology, and more specifically, to a delayed unlocking mechanism and a floor spring. Background Technology

[0002] In some places, doors need to be kept closed. People usually install door closers on the door frame. A door closer is a hydraulic device similar to a spring. When the door is opened, it can be compressed and released to automatically close the door, just like a spring door. It can ensure that the door closes accurately and promptly to the initial position after it is opened. However, when people open and release the door, the existing door closer will quickly push the door closed in the opposite direction, affecting people's normal entry and exit, especially affecting frequently used places such as conference rooms and offices, and especially the normal entry and exit of special groups such as the elderly and children. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a delayed unlocking mechanism and a floor spring.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A time-delayed unlocking mechanism includes a housing, a unidirectional damper and a bidirectional damper mounted on the housing in the same direction;

[0006] A first compression spring is fitted on the first piston rod of the unidirectional damper, and a second compression spring is fitted on the second piston rod of the bidirectional damper;

[0007] A linkage shaft is provided on the end of the first piston rod, and an inclined groove is provided on the end of the second piston rod. The end of the linkage shaft is oriented toward the second piston rod and cooperates with the inclined groove.

[0008] The first compression spring drives the first piston rod to move outward rapidly, and the linkage shaft slides along the inclined groove, driving the first piston rod to rotate and close the one-way damper oil passage; the second compression spring overcomes the resistance of the two-way damper and pushes the second piston rod to move outward slowly, causing the linkage shaft to slide in the opposite direction along the inclined groove, driving the first piston rod to rotate in the opposite direction and reopening the one-way damper oil passage.

[0009] The present invention further comprises: the unidirectional damper includes a housing, and the first piston rod is rotatably disposed in a sealed cavity of the housing, the sealed cavity being filled with damping oil;

[0010] The piston assembly at the end of the first piston rod divides the sealing cavity into an upper sealing cavity and a lower sealing cavity;

[0011] The piston assembly includes an upper piston and a lower piston that cooperate with each other. The upper piston is rotatably mounted on a first piston rod, and the lower piston is fixedly mounted on the first piston rod.

[0012] The oil passage includes an oil inlet on the lower piston and an oil outlet on the upper piston. When the first piston rod drives the lower piston to rotate, the oil outlet and the oil inlet are offset, thus closing the oil passage.

[0013] The present invention further comprises: an annular groove for installing a sealing ring is provided on the outer side wall of the upper piston, and the sealing ring is movably disposed in the annular groove; a plurality of upper oil passage grooves are provided on the end of the upper piston near the upper sealing ring, and a plurality of lower oil passage grooves are provided on the bottom wall of the annular groove;

[0014] The upper oil passage is connected to the upper sealing cavity, and the lower oil passage is connected to the lower sealing cavity;

[0015] The damping oil flows from the upper sealing cavity into the lower sealing cavity, causing the sealing ring to separate from the upper oil groove; thus connecting the upper oil groove with the annular groove.

[0016] The present invention further includes a plurality of upper oil passages and a plurality of lower oil passages arranged in a one-to-one correspondence.

[0017] A floor spring includes a base, on which a slider is slidably disposed. One end of the slider abuts against a return spring, and the other end abuts against the time-delay unlocking mechanism as described in claims 1-4.

[0018] The slider slides toward one end of the return spring, with one end separated from the first piston rod and the second piston rod, and the other end compressing the return spring.

[0019] The present invention further includes: a rotating shaft rotatably mounted on the base, one end of the rotating shaft being connected to the door leaf, and the other end being connected to a cam that cooperates with the slider; when the door leaf is opened, the cam pushes the slider to slide toward one end of the return spring, compressing the return spring.

[0020] The beneficial effects of this invention are as follows: The delayed unlocking mechanism includes a housing and a unidirectional damper and a bidirectional damper mounted on the housing in the same direction; a first compression spring is sleeved on the first piston rod of the unidirectional damper, and a second compression spring is sleeved on the second piston rod of the bidirectional damper; a linkage shaft is provided at the end of the first piston rod, and a groove is provided at the end of the second piston rod, with the end of the linkage shaft facing the second piston rod and cooperating with the groove;

[0021] When the first compression spring drives the first piston rod to move outward rapidly (because the one-way damper provides no resistance during the outward movement of the first piston rod), the linkage shaft slides along the inclined groove, causing the first piston rod to rotate, closing the oil passage of the one-way damper, thus locking the first piston rod and preventing it from moving inward; simultaneously, the second compression spring overcomes the resistance of the two-way damper, pushing the second piston rod to move outward slowly, causing the linkage shaft to slide in the opposite direction along the inclined groove, causing the first piston rod to rotate in the opposite direction, reopening the oil passage of the one-way damper, releasing the lock on the first piston rod, allowing both the first and second piston rods to be pushed inward simultaneously; during this process, the first piston rod moves outward rapidly and is quickly locked, and the lock on the first piston rod is released after the second piston rod moves outward; the time difference is the delay unlocking time of this delayed unlocking mechanism; by installing this mechanism on the door leaf, the door leaf can remain in the open state for a period of time after opening, giving personnel sufficient time to enter and exit. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0023] Figure 2 Diagram showing the fit between a unidirectional damper and a bidirectional damper;

[0024] Figure 3 This is a schematic diagram of a bidirectional damper.

[0025] Figure 4 An exploded view of a unidirectional damper;

[0026] Figure 5 Diagram showing the open state of the compression oil passage of a unidirectional damper;

[0027] Figure 6 Diagram showing the open state of the oil passage hole extending from the unidirectional damper;

[0028] Figure 7 Diagram showing the closed state of the oil passage of the unidirectional damper;

[0029] Figure 8 This is a schematic diagram of the upper piston structure;

[0030] Figure 9 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0031] Figure 10 This is an exploded view of Embodiment 2 of the present invention;

[0032] Explanation of reference numerals in the attached drawings: 1. Housing; 2. One-way damper; 21. First piston rod; 211. Linkage shaft; 22. First compression spring; 23. Outer shell; 24. Piston assembly; 241. Upper piston; 2411. Oil outlet; 2412. Annular groove; 2413. Sealing ring; 2414. Upper oil groove; 2415. Lower oil groove; 242. Lower piston; 2421. Oil inlet; 3. Two-way damper; 31. Second piston rod; 311. Inclined groove; 32. Second compression spring; 4. Base; 41. Slider; 42. Return spring; 43. Rotating shaft; 44. Cam. Detailed Implementation

[0033] See attached document Figures 1 to 10 The present invention provides a further detailed description of a time-delay unlocking mechanism and a floor spring.

[0034] Example 1: A time-delay unlocking mechanism includes a housing 1, a unidirectional damper 2 and a bidirectional damper 3 mounted on the housing 1 in the same direction;

[0035] A first compression spring 22 is sleeved on the first piston rod 21 of the unidirectional damper 2, and a second compression spring 32 is sleeved on the second piston rod 31 of the bidirectional damper 3.

[0036] A linkage shaft 211 is provided on the end of the first piston rod 21, and a groove 311 is provided on the end of the second piston rod 31. The end of the linkage shaft 211 is oriented toward the second piston rod 31 and cooperates with the groove 311.

[0037] When the first compression spring 22 drives the first piston rod 21 to move outward rapidly (because the one-way damper 2 provides no resistance during the outward movement of the first piston rod 21), the linkage shaft 211 slides along the inclined groove 311, causing the first piston rod 21 to rotate, closing the oil passage of the one-way damper 2, thus locking the first piston rod 21 and preventing it from moving inward; at the same time, the second compression spring 32 overcomes the resistance of the two-way damper 3 and pushes the second piston rod 31 to move outward slowly, causing the linkage shaft 211 to slide in the opposite direction along the inclined groove 311, thus causing the first piston rod 21 to rotate in the opposite direction. Reopen the oil passage of the one-way damper 2 to release the lock on the first piston rod 21, allowing the first piston rod 21 and the second piston rod 31 to be pushed inward simultaneously. During this process, the first piston rod 21 moves outward rapidly and is quickly locked. After the second piston rod 31 moves outward, the lock on the first piston rod 21 is released. The time difference is the delay unlocking time of the delay unlocking mechanism. When this mechanism is installed on the door, the door can remain open for a period of time after it is opened, giving people enough time to enter and exit.

[0038] The unidirectional damper 2 includes a housing 23, and the first piston rod 21 is rotatably disposed in a sealed cavity of the housing 23, which is filled with damping oil.

[0039] The piston assembly 24 at the end of the first piston rod 21 divides the sealing cavity into an upper sealing cavity and a lower sealing cavity;

[0040] The piston assembly 24 includes an upper piston 241 and a lower piston 242 that cooperate with each other. The upper piston 241 is rotatably mounted on the first piston rod 21, and the lower piston 242 is fixedly mounted on the first piston rod 21. The connecting end of the first piston rod 21 for mounting the piston assembly 24 is a flat shaft. The lower piston 242 has a flat hole in the middle that matches the flat shaft, and the upper piston 241 has a round hole in the middle. The lower piston 242 and the upper piston 241 are respectively fitted onto the flat shaft through the flat hole and the round hole. The sealing cavity of the lower connecting sleeve of the housing 1 is non-circular in shape. The outer contour of the lower piston 242 is circular in shape, and the outer contour of the upper piston 241 is non-circular in shape that matches the sealing cavity. This is such that when the piston rod is rotated, the lower piston 242 rotates together with the first piston rod 21, while the upper piston 241 rotates relative to the lower piston 242.

[0041] The oil passage includes an oil inlet 2421 on the lower piston 242 and an oil outlet 2411 on the upper piston 241. When the first piston rod 21 drives the lower piston 242 to rotate, the oil outlet 2411 is offset from the oil inlet 2421, thus closing the oil passage. After the first piston rod 21 is rotated in the opposite direction, the oil outlet 2411 is positioned opposite to the oil inlet 2421, thus reopening the oil passage. This allows the damping oil in the lower sealing cavity to enter the upper sealing cavity through the oil passage after the first piston rod 21 is compressed inward.

[0042] The upper piston 241 has an annular groove 2412 on its outer side wall for installing a sealing ring 2413, and the sealing ring 2413 is movably disposed in the annular groove 2412; the upper piston 241 has a plurality of upper oil passage grooves 2414 at one end near the upper sealing ring 2413, and the bottom wall of the annular groove 2412 has a plurality of lower oil passage grooves 2415; wherein the plurality of upper oil passage grooves 2414 and the plurality of lower oil passage grooves 2415 are arranged in a one-to-one correspondence.

[0043] The upper oil passage 2414 is connected to the upper sealing cavity, and the lower oil passage 2415 is connected to the lower sealing cavity;

[0044] The damping oil flows from the upper sealing cavity into the lower sealing cavity, causing the sealing ring 2413 to separate from the upper oil groove 2414; the upper oil groove 2414 is connected to the annular groove 2412, so that the damping oil in the upper sealing cavity can quickly pass through the upper oil groove 2414 and the lower oil groove 2415 into the lower sealing cavity; there is no damping effect.

[0045] When damping oil flows from the lower sealing cavity into the upper sealing cavity, it causes the sealing ring 2413 to adhere tightly to the lower opening of the upper oil passage groove 2414, blocking the upper oil passage groove 2414 from the annular groove 2412. This prevents the damping oil in the lower sealing cavity from entering the upper sealing cavity through the lower oil passage groove 2415 and the upper oil passage groove 2414, and it can only enter the upper sealing cavity through the oil passage hole, thus playing a damping role.

[0046] Example 2: A floor spring includes a base 4, on which a slider 41 is slidably disposed. One end of the slider 41 abuts against a return spring 42, and the other end abuts against the aforementioned delayed unlocking mechanism. A rotating shaft 43 is also rotatably disposed on the base 4. One end of the rotating shaft 43 is connected to a door leaf, and the other end is connected to a cam 44 that cooperates with the slider 41. When the door leaf is opened, the cam 44 pushes the slider 41 to slide towards one end of the return spring 42, separating one end from the first piston rod 21 and the second piston rod 31, and compressing the return spring 42 at the other end. After the slider 41 separates from the first piston rod 21 and the second piston rod 31, the first compression spring 22 drives the first piston rod 21 to move outward rapidly. The linkage shaft 211 slides along the inclined groove 311, driving the first piston rod 21 to rotate, closing the oil passage of the one-way damper 2, locking the first piston rod 21 so that it cannot move inward, thus locking the door leaf in the open state.

[0047] Simultaneously, the second compression spring 32 overcomes the resistance of the bidirectional damper 3, pushing the second piston rod 31 to move slowly outward, causing the linkage shaft 211 to slide in the opposite direction along the inclined groove 311, driving the first piston rod 21 to rotate in the opposite direction, reopening the oil passage of the unidirectional damper 2, releasing the lock on the first piston rod 21, and the reset spring 42 pushes the slider 41 to slide towards the delayed unlocking mechanism, and drives the door to close; during the closing process, the door is simultaneously blocked by the unidirectional damper 2 and the bidirectional damper 3, closing slowly and playing a damping role; preventing the door from rapidly impacting the door frame, thus protecting the door.

[0048] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A time-delay unlocking mechanism, characterized in that: Includes a housing, a unidirectional damper and a bidirectional damper mounted on the housing in the same direction; A first compression spring is fitted on the first piston rod of the unidirectional damper, and a second compression spring is fitted on the second piston rod of the bidirectional damper; A linkage shaft is provided on the end of the first piston rod, and an inclined groove is provided on the end of the second piston rod. The end of the linkage shaft is oriented toward the second piston rod and cooperates with the inclined groove. The first compression spring drives the first piston rod to move outward rapidly, and the linkage shaft slides along the inclined groove, driving the first piston rod to rotate and close the one-way damper oil passage; the second compression spring overcomes the resistance of the two-way damper and pushes the second piston rod to move outward slowly, causing the linkage shaft to slide in the opposite direction along the inclined groove, driving the first piston rod to rotate in the opposite direction and reopening the one-way damper oil passage.

2. The delayed unlocking mechanism according to claim 1, characterized in that: The unidirectional damper includes a housing, and the first piston rod is rotatably disposed in a sealed cavity of the housing, which is filled with damping oil. The piston assembly at the end of the first piston rod divides the sealing cavity into an upper sealing cavity and a lower sealing cavity; The piston assembly includes an upper piston and a lower piston that cooperate with each other. The upper piston is rotatably mounted on a first piston rod, and the lower piston is fixedly mounted on the first piston rod. The oil passage includes an oil inlet on the lower piston and an oil outlet on the upper piston. When the first piston rod drives the lower piston to rotate, the oil outlet and the oil inlet are offset, thus closing the oil passage.

3. The delayed unlocking mechanism according to claim 2, characterized in that: The outer side wall of the upper piston is provided with an annular groove for installing a sealing ring, and the sealing ring is movably disposed in the annular groove; the end of the upper piston near the upper sealing ring is provided with a plurality of upper oil passage grooves, and the bottom wall of the annular groove is provided with a plurality of lower oil passage grooves. The upper oil passage is connected to the upper sealing cavity, and the lower oil passage is connected to the lower sealing cavity; The damping oil flows from the upper sealing cavity into the lower sealing cavity, causing the sealing ring to separate from the upper oil groove; thus connecting the upper oil groove with the annular groove.

4. The delayed unlocking mechanism according to claim 3, characterized in that: Several upper oil tanks and several lower oil tanks are set up in a one-to-one correspondence.

5. A floor spring, characterized in that: Includes a base, on which a slider is slidably disposed, one end of the slider abutting against a reset spring, and the other end abutting against the delayed unlocking mechanism as described in claims 1-4; The slider slides toward one end of the return spring, with one end separated from the first piston rod and the second piston rod, and the other end compressing the return spring.

6. A floor spring according to claim 5, characterized in that: A rotating shaft is rotatably mounted on the base. One end of the rotating shaft is connected to the door leaf, and the other end is connected to a cam that cooperates with the slider. When the door leaf is opened, the cam pushes the slider to slide towards the end of the return spring, compressing the return spring.

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