Magnetic mute lock body

Abstract

The present application relates to the technical field of lock, in particular to a magnetic mute lock body, which comprises a lock shell, a buckle seat, a lock tongue, a lock opening driving part, the inner side of the buckle seat is provided with a first magnetic block, the lock shell is further provided with a pressure increasing assembly and a second magnetic block which can repel the first magnetic block and move, the pressure increasing assembly has an input rod connected with the second magnetic block and an output rod connected with the lock tongue, the first magnetic block is arranged on the inner side of the buckle seat, the second magnetic block which can repel the first magnetic block is arranged in the lock shell, the second magnetic block and the lock tongue are drivingly connected through the pressure increasing assembly, after the door is closed, the input rod of the pressure increasing assembly is moved due to the repulsion between the second magnetic block and the first magnetic block, then the lock tongue is inserted into the buckle seat through the output rod of the pressure increasing assembly, and because the thrust of the output rod on the lock tongue is greater than the thrust of the second magnetic block on the input rod, the lock tongue can be easily extended from the lock shell and locked with the buckle seat, the locking process of the lock tongue is more stable and no noise caused by the collision of the magnetic blocks.

Description

Technical Field

[0001] This invention relates to the field of lock technology, specifically to a magnetic silent lock body. Background Technology

[0002] Currently, most locks use pin tumbler locks, which utilize offset pins to prevent the lock cylinder from rotating, thus achieving the locking action. However, as people's living standards continue to improve, there are certain requirements for the decoration of doors and door frames. Modern locks mainly consist of a bolt and an unlocking follower connected to the bolt. The unlocking follower is connected to the bolt via a swinging mechanism. In most locks, the bolt is exposed outside the lock body. During closing, if the locking device (safety mechanism) is accidentally disengaged, the safety mechanism will keep the bolt in the locked state. The bolt is prone to colliding with the door frame, potentially damaging the frame and affecting its appearance. Repairing this can cause unnecessary financial losses. Furthermore, the bolt protruding from the door due to spring force can easily injure children.

[0003] Chinese patent CN102345419B discloses a magnetic lock, including a lock body and an unlocking component fixedly installed on a door leaf, and a latch fixedly installed on a door frame; the lock body has a bolt, which is pivotally connected to the lock body through a bolt mounting shaft; the bolt has a first bolt magnetic block and a second bolt magnetic block at both ends of the bolt mounting shaft, and the latch has a first latch magnetic block and a second latch magnetic block at corresponding positions; wherein the first bolt magnetic block and the first latch magnetic block are set to attract each other with opposite poles, and the second bolt magnetic block and the second latch magnetic block are set to repel each other with the same poles.

[0004] This magnetic lock features a first and a second magnetic block at each end of the latch mounting shaft, with corresponding magnetic blocks on the latch seat. The first and second magnetic blocks are designed to attract each other with opposite poles, while the second and third magnetic blocks are designed to repel each other with like poles. The latch ejection is achieved using magnetic attraction or repulsion. Due to the strong magnetic force, the latch moves at high speeds and accelerations, causing the mechanical parts to collide and producing a harsh noise. Summary of the Invention

[0005] To address the aforementioned issues, a magnetic silent lock body is provided. By connecting the bolt and the second magnet through a booster assembly, the bolt can lock more smoothly without the sound of magnets colliding, thus solving the problem that existing bolts generate significant noise when moving at high speeds and accelerations.

[0006] To address the problems of existing technologies, this invention provides a magnetic silent lock body, comprising a lock shell fixedly installed on a door leaf and a latch fixedly installed on a door frame. The lock shell contains a bolt that can couple with the latch and an unlocking active component that is linked to the bolt. A first magnetic block is provided on the inner side of the latch. The lock shell also contains a pressure boosting component and a second magnetic block that can repel and move against the first magnetic block. The pressure boosting component has an input rod connected to the second magnetic block and an output rod connected to the bolt. During the process of the second magnetic block repelling and moving against the first magnetic block, the input rod and the output rod slide synchronously to drive the bolt to couple with the latch. The pushing force of the output rod on the bolt is greater than the pushing force of the second magnetic block on the input rod.

[0007] Preferably, the booster assembly further includes a first sliding cavity and a second sliding cavity. The input rod extends into the first sliding cavity and is provided with a first piston. The space to the right of the first piston forms a first pressure cavity for oil injection. The output rod extends into the second sliding cavity and is provided with a second piston. The space to the right of the second piston forms a second pressure cavity for oil injection. The space to the left of the second piston forms a reset air cavity. The first pressure cavity and the second pressure cavity are connected. The effective pressure-bearing area of ​​the second piston is N times the effective pressure-bearing area of ​​the first piston (N is greater than 2).

[0008] Preferably, there are two first sliding chambers. One end of the second piston is provided with a partition rod that separates the second pressure chamber. The partition rod slides through the second sliding chamber and is linked to the unlocking active component. The partition rod divides the second pressure chamber into an upper pressure chamber and a lower pressure chamber. The upper pressure chamber and the lower pressure chamber are respectively connected to the two first sliding chambers. The effective force-bearing area of ​​the second piston in the upper pressure chamber is greater than the effective force-bearing area of ​​the first piston in the first sliding chamber connected to the upper pressure chamber. The effective force-bearing area of ​​the second piston in the lower pressure chamber is greater than the effective force-bearing area of ​​the first piston in the first sliding chamber connected to the lower pressure chamber.

[0009] Preferably, the pressurization assembly includes a first sealing shell disposed in the lock housing, wherein an upper partition and a lower partition extending from left to right are disposed in the first sealing shell, the top of the upper partition and the bottom of the lower partition respectively form a first sliding cavity, a second sliding cavity is formed between the upper partition and the lower partition, a first piston is slidably disposed at the top of the upper partition and the bottom of the lower partition, and a second piston is slidably disposed between the upper partition and the lower partition.

[0010] Preferably, one end of the first sealing shell is provided with a sealing cover that can be opened and closed, and the upper partition and the lower partition form a communication port with the sealing cover. The communication port is used to connect the first pressure chamber and the second pressure chamber, and the oil in the first pressure chamber can enter the second pressure chamber through the communication port.

[0011] Preferably, a first sealing ring is fitted on the outer side of the first piston, and the first sealing ring is interference-fitted with the first sliding cavity; a second sealing ring is fitted on the outer side of the second piston, and the second sealing ring is interference-fitted with the second sliding cavity.

[0012] Preferably, the pressurization assembly includes a second sealing shell and two third sealing shells disposed in the lock housing. The two third sealing shells are respectively located at the top and bottom of the second sealing shell. The inner cavity of the second sealing shell forms a second sliding cavity, and the inner cavity of the third sealing shell forms a first sliding cavity. The second sealing shell and the third sealing shell are connected by a connecting pipe.

[0013] Preferably, the outer end of the input rod is provided with a card holder, one end of the card holder is provided with a card slot, and the second magnetic block is fitted into the card slot.

[0014] Preferably, the outer end of the output rod is provided with a post, one end of the locking tongue is provided with a slot and a bolt hole extending radially outward from the slot, a screw is provided in the threaded hole for threaded connection, the post is inserted into the slot, and the screw abuts against the circumferential surface of the post radially.

[0015] Preferably, the unlocking active component includes a square bar, a handle lever, and a tension spring. The square bar passes through the lock housing and the door leaf and is rotatably connected to them. The handle lever is rotatably disposed in the lock housing and has a through-hole coupled to the square bar. The handle lever has a pawl and a first connecting lug. A limit pin is provided on the outer side of the partition bar. A second connecting lug is provided inside the lock housing. The two ends of the tension spring are connected to the first and second connecting lugs, respectively. After the partition bar slides into the second sliding cavity, the limit pin abuts against the pawl. When the square bar is rotated, the handle lever rotates to drive the limit pin to move horizontally through the pawl.

[0016] The advantages of this invention compared to the prior art are:

[0017] This invention provides a first magnetic block on the inner side of the latch seat and a second magnetic block that repels the first magnetic block in the lock housing. The second magnetic block and the bolt are connected by a booster assembly. When the door is closed, the second magnetic block repels the first magnetic block, causing the input rod of the booster assembly to move. This, in turn, causes the bolt to engage in the latch seat via the output rod of the booster assembly. Since the pushing force of the output rod on the bolt is greater than the pushing force of the second magnetic block on the input rod, the bolt can easily extend from the lock housing and lock with the latch seat. The bolt locking process is smoother and free from noise caused by collisions between magnetic blocks. Attached Figure Description

[0018] Figure 1 This is a 3D diagram of a magnetic silent lock.

[0019] Figure 2This is a perspective sectional view of a first embodiment of a pressurization component in a magnetic silent lock body in its initial state.

[0020] Figure 3 This is a schematic diagram of the first embodiment of a pressurization component in a magnetic silent lock body in its initial state.

[0021] Figure 4 This is a three-dimensional exploded view of a magnetic silent lock body.

[0022] Figure 5 This is a three-dimensional view of a pressure boosting component in a magnetic silent lock body.

[0023] Figure 6 This is a three-dimensional exploded view of a pressurization component in a magnetic silent lock body.

[0024] Figure 7 This is a schematic diagram of a magnetic silent lock in the locked state.

[0025] Figure 8 This is a schematic diagram of a magnetic silent lock body in the unlocked state.

[0026] Figure 9 This is a schematic diagram of a second embodiment of a pressurization component in a magnetic silent lock body in its initial state.

[0027] The following are the labels in the diagram: 1. Lock housing; 11. Second magnet; 12. Second connecting lug; 2. Buckle seat; 21. First magnet; 22. Mounting box; 3. Lock tongue; 4. Unlocking actuator; 41. Square bar; 42. Handle lever; 421. Paw; 422. First connecting lug; 43. Tension spring; 51. Input rod; 511. Card seat; 52. Output rod; 521. Insert post; 53. First piston; 531. First sealing ring; 54. Second piston; 541. Second sealing ring; 55. Spacer; Limit pin; 551; 56. First sealing shell; 561. Upper partition; 562. Lower partition; 563. Sealing cover; 571. Second sealing shell; 572. Third sealing shell; 573. Connecting pipe; 58. Screw. Detailed Implementation

[0028] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1 and Figure 2 As shown, the present invention provides:

[0030] A magnetic silent lock body includes a lock shell 1 fixedly installed on a door leaf and a latch 2 fixedly installed on a door frame. The lock shell 1 is provided with a bolt 3 that can be coupled with the latch 2, and an unlocking active component 4 that is linked to the bolt 3. A first magnetic block 21 is provided on the inner side of the latch 2. The lock shell 1 is also provided with a pressure boosting component and a second magnetic block 11 that can repel and move against the first magnetic block 21. The pressure boosting component has an input rod 51 connected to the second magnetic block 11 and an output rod 52 connected to the bolt 3. During the process of the second magnetic block 11 repelling and moving against the first magnetic block 21, the input rod 51 and the output rod 52 slide synchronously to drive the bolt 3 to couple with the latch 2. The pushing force of the output rod 52 on the bolt 3 is greater than the pushing force of the second magnetic block 11 on the input rod 51.

[0031] This magnetic silent lock body is used for door security locking. The lock body consists of two parts: a lock housing 1 and a latch 2. The lock housing 1 is fixedly installed on the door leaf and includes a bolt 3 that connects to the latch 2, as well as an unlocking actuator 4 connected to the bolt 3. The latch 2 is fixedly installed on the door frame and has a first magnetic block 21 on its inner side. The lock housing 1 also includes a pressure boosting component and a second magnetic block 11, which can repel the first magnetic block 21 and move within the lock housing 1. The pressure boosting component includes an input rod 51 connected to the second magnetic block 11 and an output rod 52 connected to the bolt 3. During the repulsion and movement of the second magnetic block 11 and the first magnetic block 21, the input rod 51 and the output rod 52 slide synchronously, causing the bolt 3 to couple with the latch 2. During this process, the pushing force of the output rod 52 on the latch 3 is greater than the pushing force of the second magnetic block 11 on the input rod 51, thereby ensuring that the latch 3 is firmly locked on the latch seat 2, thus realizing the safe locking of the door leaf. The entire design utilizes magnetic force and sliding connection, while ensuring the sturdiness and quietness of the lock body.

[0032] When the door is locked to the door frame and needs to be opened, the unlocking actuator 4 is rotated, causing the locking actuator 4 to drive the bolt 3 out of the latch seat 2, thereby allowing the door to rotate relative to the latch seat 2, thus unlocking the door.

[0033] In this embodiment, a first magnetic block 21 is provided on the inner side of the latch seat 2, and a second magnetic block 11 that can repel the first magnetic block 21 is provided in the lock housing 1. The second magnetic block 11 and the latch 3 are connected by a booster assembly. After the door is closed, the second magnetic block 11 repels the first magnetic block 21, which drives the input rod 51 of the booster assembly to move. Then, the output rod 52 of the booster assembly drives the latch 3 to be inserted into the latch seat 2. At the same time, because the pushing force of the output rod 52 on the latch 3 is greater than the pushing force of the second magnetic block 11 on the input rod 51, the latch 3 can be easily extended from the lock housing 1 and locked with the latch seat 2. The locking process of the latch 3 is more stable and there is no noise caused by the collision of magnetic blocks.

[0034] like Figure 3 , Figure 4, Figure 7 indivual Figure 8 As shown, the booster assembly further includes a first sliding cavity and a second sliding cavity. The input rod 51 extends into the first sliding cavity and is provided with a first piston 53. The space to the right of the first piston 53 forms a first pressure cavity for oil injection. The output rod 52 extends into the second sliding cavity and is provided with a second piston 54. The space to the right of the second piston 54 forms a second pressure cavity for oil injection. The space to the left of the second piston 54 forms a reset air cavity. The first pressure cavity and the second pressure cavity are connected. The effective pressure-bearing area of ​​the second piston 54 is N times (N is greater than 2) the effective pressure-bearing area of ​​the first piston 53.

[0035] It should be noted that the "effective pressure-bearing area" is the area of ​​the hydraulic oil acting on the first piston 53 and the second piston 54 when the hydraulic oil is flowing.

[0036] After the door is closed, the second magnetic block 11 repels the first magnetic block 21, causing the second magnetic block 11 to move within the lock housing 1. The second locking block drives the input rod 51 to slide, and the first piston 53 slides in the first sliding cavity to compress the first pressure cavity. The pressure in the first pressure cavity increases, and since the first pressure cavity is connected to the second pressure cavity, the pressure in the second pressure cavity also increases. This causes the second piston 54 to slide in the second sliding cavity to compress the reset air cavity. Since the effective pressure-bearing area of ​​the second piston 54 is N times (N is greater than 2) that of the first piston 53, according to the pressure principle, the force required for the first piston 53 to slide is much less than the force required for the second piston 54 to slide. This allows the output rod 52 to drive the latch 3 to insert into the latch seat 2, thus stably connecting the door leaf and the door frame.

[0037] After the reset air chamber is compressed, the pressure increases. After the locking action 4 drives the bolt 3 to exit from the latch 2 and open the door, the second magnetic block 11 has no repulsive force. This allows the pressure in the reset air chamber to drive the second piston 54 to reset, which in turn drives the first piston 53 to reset, so that the door can be closed later.

[0038] like Figure 3 As shown, there are two first sliding chambers. One end of the second piston 54 is provided with a partition rod 55 that separates the second pressure chamber. The partition rod 55 slides through the second sliding chamber and is linked to the unlocking active member 4. The partition rod 55 divides the second pressure chamber into an upper pressure chamber and a lower pressure chamber. The upper pressure chamber and the lower pressure chamber are respectively connected to the two first sliding chambers. The effective force-bearing area of ​​the second piston 54 in the upper pressure chamber is greater than the effective force-bearing area of ​​the first piston 53 in the first sliding chamber connected to the upper pressure chamber. The effective force-bearing area of ​​the second piston 54 in the lower pressure chamber is greater than the effective force-bearing area of ​​the first piston in the first sliding chamber connected to the lower pressure chamber.

[0039] By sliding the spacer 55 through the left end of the second pressure chamber and connecting one end of the spacer 55 to the second piston 54, the second piston 54 can slide along with the spacer 55 when it slides. At the same time, the spacer 55 can divide the second pressure chamber into an upper pressure chamber and a lower pressure chamber, so that when the two first pistons 53 compress their respective first pressure chambers, the pressure in the upper pressure chamber and the lower pressure chamber can increase synchronously. This also increases the sliding force of the second piston 54 in the second sliding chamber, preventing the second piston 54 from being unable to slide due to excessive pressure between itself and the second sliding chamber.

[0040] like Figure 5 and Figure 6 As shown, the pressurization assembly includes a first sealing shell 56 disposed in the lock shell 1. The first sealing shell 56 is provided with an upper partition 561 and a lower partition 562 extending from left to right. The top of the upper partition 561 and the bottom of the lower partition 562 respectively form a first sliding cavity, and a second sliding cavity is formed between the upper partition 561 and the lower partition 562. A first piston 53 is slidably disposed at the top of the upper partition 561 and the bottom of the lower partition 562, and a second piston 54 is slidably disposed between the upper partition 561 and the lower partition 562.

[0041] The first sealing shell 56 is square, so that it can be installed in the lock shell 1. The lock shell 1 is provided with a limiting post, which can fix the position of the first sealing shell 56 and prevent the first sealing shell 56 from sliding in the lock shell 1.

[0042] When the two first pistons 53 slide at the top of the upper partition 561 and the bottom of the lower partition 562 respectively, the pressure in the space to the right of the two first pistons 53 increases, that is, the pressure in the first pressure chamber increases. Since the first pressure chamber is connected to the second pressure chamber, the pressure in the second pressure chamber increases, thereby driving the second piston 54 to slide in the second sliding chamber, so as to drive the locking tongue 3 to be stably inserted into the buckle 2.

[0043] like Figure 7 and Figure 8 As shown, one end of the first sealing shell 56 is provided with a sealing cover 563 that can be opened and closed. The upper partition 561 and the lower partition 562 form a communication port with the sealing cover 563. The communication port is used to connect the first pressure chamber and the second pressure chamber. The oil in the first pressure chamber can enter the second pressure chamber through the communication port.

[0044] To facilitate the sliding installation of the first piston 53 in the first sliding cavity and the second piston 54 in the second sliding cavity, a sealing cover 563 is provided at one end of the first sealing shell 56. This allows the first piston 53 to be installed in the first sliding cavity and the second piston 54 to be slidably installed in the second sliding cavity by opening the sealing cover 563. This enables the input rod 51 to drive the first piston 53 to slide stably in the first sliding cavity, while the second piston 54 can drive the output rod 52 to slide stably.

[0045] like Figure 6 As shown, a first sealing ring 531 is sleeved on the outer side of the first piston 53, and the first sealing ring 531 is interference-fitted with the first sliding cavity. A second sealing ring 541 is sleeved on the outer side of the second piston 54, and the second sealing ring 541 is interference-fitted with the second sliding cavity.

[0046] By interfering with the first sealing ring 531 and the first sliding cavity, hydraulic oil in the first pressure cavity can be prevented from flowing into the right side space of the first piston 53 through the gap. Similarly, by interfering with the second sealing ring 541 and the second sliding cavity, hydraulic oil in the second pressure cavity can be prevented from flowing into the right side space of the second piston 54 through the gap.

[0047] like Figure 9 As shown, the pressurization assembly includes a second sealing shell 571 and two third sealing shells 572 disposed in the lock shell 1. The two third sealing shells 572 are located at the top and bottom of the second sealing shell 571, respectively. The inner cavity of the second sealing shell 571 forms a second sliding cavity, and the inner cavity of the third sealing shell 572 forms a first sliding cavity. The second sealing shell 571 and the third sealing shell 572 are connected by a connecting pipe 573.

[0048] By setting two third sealing shells 572, the first piston 53 slides in the third sealing shell 572, and the hydraulic oil in the third sealing shell 572 is squeezed into the second sealing shell 571 through the connecting pipe 573, so that the second piston 54 moves to the left under the condition of increased pressure in the space on its right side, thereby driving the locking tongue 3 to insert into the buckle 2.

[0049] like Figure 3 As shown, the outer end of the input rod 51 is provided with a card holder 511, and one end of the card holder 511 is provided with a card slot, in which the second magnetic block 11 is fitted.

[0050] To facilitate the stable installation of the second magnetic block 11 with the input rod 51, a card holder 511 with a card slot is provided at one end of the output rod 52, so that the second magnetic block 11 can be fitted into the card slot. At the same time, to prevent the second magnetic block 11 from gradually demagnetizing and to facilitate replacement.

[0051] like Figure 3As shown, the outer end of the output rod 52 is provided with a post 521, one end of the locking tongue 3 is provided with a slot and a bolt hole extending radially outward along the slot, and a screw 58 is provided in the threaded hole for threaded connection with it. The post 521 is inserted into the slot, and the screw 58 abuts against the circumferential surface of the post 521 radially.

[0052] In order to stably connect the output rod 52 and the locking tongue 3, the outer end of the output rod 52 is extended outward to form a post 521, which is inserted into the slot of the locking tongue 3. At the same time, the screw 58 is screwed into the threaded bolt hole, so that the screw 58 can abut against the post 521 radially, thereby stably connecting the locking tongue 3 and the output rod 52.

[0053] like Figure 5 and Figure 6 As shown, the unlocking active component 4 includes a square bar 41, a handle lever 42, and a tension spring 43. The square bar 41 passes through the lock housing 1 and the door leaf and is rotatably connected to them. The handle lever 42 is rotatably disposed in the lock housing 1. The handle lever 42 has a through-hole that couples with the square bar 41. The handle lever 42 has a pawl 421 and a first connecting ear 422. A limit pin 551 is provided on the outer side of the partition rod 55. A second connecting ear 12 is provided inside the lock housing 1. The two ends of the tension spring 43 are respectively connected to the first connecting ear 422 and the second connecting ear 12. After the partition rod 55 slides into the second sliding cavity, the limit pin 551 abuts against the pawl 421. When the square bar 41 is rotated, the handle lever 42 rotates to drive the limit pin 551 to move horizontally through the pawl 421.

[0054] When the latch 3 is inserted into the latch seat 2, the limit pin 551 abuts against one side of the pawl 421.

[0055] When the bolt 3 needs to be disengaged from the latch seat 2, the square bar 41 is rotated, causing the handle pawl 42 to rotate at a certain angle within the lock housing 1. The pawl 421 rotates at a certain angle along the axis of the handle pawl 42, thereby causing the pawl 421 to abut against the limit pin 551 and drive the partition bar 55 to slide to the right, thus enabling the bolt 3 to disengage from the latch seat 2, thereby fulfilling the conditions for opening the door.

[0056] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A magnetic silent lock body, comprising a lock shell fixedly mounted on a door leaf, and a latch fixedly mounted on a door frame, wherein the lock shell is provided with a bolt capable of coupling with the latch, and an unlocking active component linked to the bolt, characterized in that, The inner side of the buckle is provided with a first magnetic block, and the lock housing is also provided with a pressurizing component and a second magnetic block that can repel and move with the first magnetic block. The pressurizing component has an input rod connected to the second magnetic block and an output rod connected to the lock tongue. During the process of the second magnetic block repelling and moving with the first magnetic block, the input rod and the output rod slide synchronously to drive the lock tongue to couple with the buckle. The pushing force of the output rod on the lock tongue is greater than the pushing force of the second magnetic block on the input rod. The booster assembly further includes a first sliding chamber and a second sliding chamber. The input rod extends into the first sliding chamber and is provided with a first piston. The space to the right of the first piston forms a first pressure chamber for oil injection. The output rod extends into the second sliding chamber and is provided with a second piston. The space to the right of the second piston forms a second pressure chamber for oil injection. The space to the left of the second piston forms a reset air chamber. The first pressure chamber and the second pressure chamber are connected. The effective pressure-bearing area of ​​the second piston is N times the effective pressure-bearing area of ​​the first piston, where N is greater than 2.

2. The magnetic silent lock body according to claim 1, characterized in that, The first sliding chamber has two parts. One end of the second piston is provided with a partition rod that separates the second pressure chamber. The partition rod slides through the second sliding chamber and is linked to the unlocking active component. The partition rod divides the second pressure chamber into an upper pressure chamber and a lower pressure chamber. The upper pressure chamber and the lower pressure chamber are respectively connected to the two first sliding chambers. The effective force-bearing area of ​​the second piston in the upper pressure chamber is larger than the effective force-bearing area of ​​the first piston in the first sliding chamber connected to the upper pressure chamber. The effective force-bearing area of ​​the second piston in the lower pressure chamber is larger than the effective force-bearing area of ​​the first piston in the first sliding chamber connected to the lower pressure chamber.

3. A magnetic silent lock body according to claim 1, characterized in that, The pressurization assembly includes a first sealing shell disposed in a lock housing. The first sealing shell is provided with an upper partition and a lower partition extending from left to right. The top of the upper partition and the bottom of the lower partition respectively form a first sliding cavity, and a second sliding cavity is formed between the upper partition and the lower partition. A first piston is slidably disposed at the top of the upper partition and the bottom of the lower partition, and a second piston is slidably disposed between the upper partition and the lower partition.

4. A magnetic silent lock body according to claim 3, characterized in that, One end of the first sealing shell is provided with a sealing cover that can be opened and closed. The upper and lower partitions form a communication port with the sealing cover. The communication port is used to connect the first pressure chamber and the second pressure chamber. The oil in the first pressure chamber can enter the second pressure chamber through the communication port.

5. A magnetic silent lock body according to claim 3, characterized in that, The first piston is fitted with a first sealing ring on its outer side, and the first sealing ring is interference-fitted with the first sliding cavity. The second piston is fitted with a second sealing ring on its outer side, and the second sealing ring is interference-fitted with the second sliding cavity.

6. A magnetic silent lock body according to claim 1, characterized in that, The pressurization assembly includes a second sealing shell and two third sealing shells disposed in the lock housing. The two third sealing shells are located at the top and bottom of the second sealing shell, respectively. The inner cavity of the second sealing shell forms a second sliding cavity, and the inner cavity of the third sealing shell forms a first sliding cavity. The second sealing shell and the third sealing shell are connected by a connecting pipe.

7. A magnetic silent lock body according to any one of claims 1-6, characterized in that, The outer end of the input rod is provided with a card holder, one end of which is provided with a card slot, and the second magnetic block is fitted into the card slot.

8. A magnetic silent lock body according to any one of claims 1-6, characterized in that, The outer end of the output rod is provided with a pin, one end of the locking tongue is provided with a slot and a threaded hole extending radially outward from the slot. A screw is provided in the threaded hole for threaded connection. The pin is inserted into the slot, and the screw abuts against the circumferential surface of the pin radially.

9. A magnetic silent lock body according to any one of claims 2-6, characterized in that, The unlocking mechanism includes a square bar, a handle lever, and a tension spring. The square bar passes through the lock housing and the door leaf and is rotatably connected to them; The handle is rotatably mounted in the lock housing. The handle has a through opening that couples with the square bar. The handle has a pawl and a first connecting lug. A limit pin is provided on the outer side of the partition. The lock housing is provided with a second connecting lug. The two ends of the tension spring are connected to the first connecting lug and the second connecting lug, respectively. After the partition rod slides into the second sliding cavity, the limiting pin abuts against the pawl. When the square bar is rotated, the handle pawl rotates to drive the limiting pin to move horizontally through the pawl.

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