A ground pole transmission mechanism and lock

Abstract

The utility model discloses a kind of heaven and earth rod transmission mechanism and lock, heaven and earth rod transmission mechanism includes lock shell, main lock tongue mechanism is slidably arranged in lock shell, main lock tongue mechanism is under the action of unlocking force and main locking force, switch between the first unlocking state of retracting lock shell and the first locking state of extending lock shell;Lock shell is slidably arranged with heaven and earth rod;Heaven and earth rod has the second unlocking state of retracting lock shell, and the second locking state of extending lock shell;Under the one-way drive of main lock tongue mechanism from the first locking state to the first unlocking state, heaven and earth rod switches from the second locking state to the second unlocking state;Sub-locking biasing component is arranged between heaven and earth rod and lock shell, heaven and earth rod is under the independent sub-locking biasing force of main locking force exerted by sub-locking biasing component, from the second unlocking state to the second locking state, the utility model even if heaven and earth rod appears abnormal condition, main lock tongue mechanism can also switch to the first locking state normally, provide basic anti-theft guarantee for user.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, specifically to a top and bottom rod transmission mechanism and a lock. Background Technology

[0002] The national standard GB 17565-2022, "General Technical Conditions for Anti-theft Security Doors," clearly stipulates that: Level 1 anti-theft doors should have at least two locking bolts on the opening side of the door leaf; Level 2 and above anti-theft doors, in addition to the requirements for Level 1 anti-theft doors, should have at least one locking bolt within 600mm of the top and bottom edges on the opening side of the door leaf, and at least one locking bolt on the top and bottom edges of the door leaf. To meet this standard, anti-theft locks, in addition to having locking points on the bolt side, also need to have a vertical linkage mechanism, which is commonly referred to in the industry as a top and bottom hook or a top and bottom rod.

[0003] Most existing anti-theft locks with top and bottom latches typically use a transmission mechanism such as a slanted groove, swing arm, or gear to link the main latch with the top and bottom latches. The movement of the main latch drives the movement of the top and bottom latches through the transmission mechanism; that is, when the main latch extends, the top and bottom latches extend, and when the main latch retracts, the top and bottom latches retract. However, when anti-theft locks with the above structure are installed on security doors, if the top and bottom latches cannot be locked due to misalignment of the pin and pin hole, or jamming of the auxiliary lock, the main latch will also be unable to lock properly. This prevents the security door from locking normally. During the time between the malfunction and the arrival of a repairman, even if some locks can have one slanted latch engaged, this still does not meet the standard requirements for a first-class security door, posing a significant security risk to the user. Utility Model Content

[0004] In view of this, the present invention provides a top and bottom rod transmission mechanism and a lock to solve the problem that when the top and bottom rods cannot be locked out normally, the main bolt of the existing anti-theft locks also cannot be locked out normally, resulting in the anti-theft door with the anti-theft lock not meeting the standard requirements of a first-class anti-theft door.

[0005] In a first aspect, this utility model provides a top and bottom rod transmission mechanism, comprising:

[0006] Lock case;

[0007] The main bolt mechanism is slidably disposed in the lock housing. The main bolt mechanism is subjected to unlocking force and main locking force, and switches between a first unlocked state retracted into the lock housing and a first locked state extended from the lock housing.

[0008] The top and bottom rods are slidably disposed in the lock housing; the top and bottom rods have a second unlocked state retracted into the lock housing and a second locked state extended from the lock housing; driven unidirectionally by the main bolt mechanism switching from the first locked state to the first unlocked state, the top and bottom rods switch from the second locked state to the second unlocked state;

[0009] A secondary locking biasing assembly is provided between the top and bottom rods and the lock housing; the top and bottom rods are subjected to a secondary locking biasing force, independent of the main locking force, applied by the secondary locking biasing assembly, and tend to switch from the second unlocked state to the second locked state.

[0010] The top and bottom rod transmission mechanism according to this utility model has at least the following beneficial effects:

[0011] By assembling the main bolt mechanism and the top and bottom bolts separately within the lock housing, meaning there is no structural connection between them, a secondary locking biasing assembly is provided between the top and bottom bolts and the lock housing. When the main bolt mechanism moves towards retracting into the lock housing, switching from a first locked state to a first unlocked state, it abuts against the top and bottom bolts and gradually pushes them towards retracting into the lock housing, switching from a second locked state to a second unlocked state, and the secondary locking biasing assembly stores energy for power accumulation. When the main bolt mechanism moves towards extending out of the lock housing, switching from a first unlocked state to a first locked state, the secondary locking biasing assembly... The energy stored in the components is gradually released and propels the top and bottom rods to move out of the lock housing, causing them to switch from the second unlocked state to the second locked state. When the main bolt mechanism extends out of the lock housing to switch to the first locked state, the top and bottom rods are passively extended out of the lock housing under the biasing force of the secondary locking biasing component. That is, the obstruction of the top and bottom rods extending out of the lock housing does not affect the extension of the main bolt mechanism. This ensures that even if the top and bottom rods malfunction and cannot extend out of the lock housing to switch to the second locked state, the main bolt mechanism can still extend out of the lock housing to switch to the first locked state. This guarantees that the security door equipped with the lock with this top and bottom rod transmission mechanism meets at least the standard requirements of a first-level security door, providing users with basic security protection.

[0012] In one optional embodiment, a transmission mechanism is provided within the lock housing between the top and bottom rods and the main locking bolt mechanism. The transmission mechanism is used to switch the linear motion of the main locking bolt mechanism from a first locked state to a first unlocked state to the linear motion of the top and bottom rods from a second locked state to a second unlocked state.

[0013] In one optional embodiment, the transmission mechanism includes a stop portion disposed on the main locking bolt mechanism or the top and bottom rods; the main locking bolt mechanism and the top and bottom rods interact with each other through the stop portion.

[0014] In one optional embodiment, the transmission mechanism includes:

[0015] A transmission plate is rotatably mounted inside the lock housing via a rotating shaft. A stop is mounted on the transmission plate and is provided at a position corresponding to the main locking tongue mechanism. The main locking tongue mechanism abuts against the stop and drives the transmission plate to rotate around the rotating shaft.

[0016] A sector-shaped toothed portion is disposed on the outer side wall of the transmission plate;

[0017] The rack portion meshes with the fan-shaped tooth portion, and the rack portion is located on the side of the top and bottom rod facing the transmission plate.

[0018] In one optional implementation, the secondary lock-up bias assembly includes:

[0019] A stop positioning part is fixedly installed inside the lock housing;

[0020] A torsion spring is sleeved on the rotating shaft, with its first end abutting against the stop portion and its second end abutting against the stop positioning portion.

[0021] In one alternative embodiment, the secondary locking bias assembly includes an elastic element, one end of which acts on the top and bottom rods, and the other end of which is connected to the lock housing.

[0022] In one alternative embodiment, the top and bottom rods are slidably mounted on the lock housing via a top and bottom guide assembly.

[0023] In one alternative embodiment, the top and bottom guide assembly includes a sliding hole that extends vertically through the upper opposite end face of the lock housing and through which the top and bottom rods slide.

[0024] In one optional implementation, the top-to-bottom guide assembly includes:

[0025] A top and bottom sliding groove is provided on either the top and bottom rods or the lock housing;

[0026] A sliding pin is provided on the other side of the top and bottom rods and the lock housing, and the sliding pin is slidably disposed in the top and bottom sliding grooves in the vertical direction.

[0027] In one alternative embodiment, the main bolt mechanism is horizontally disposed within the lock housing via a main lock guide assembly.

[0028] Secondly, this utility model also provides a lock, including the top and bottom rod transmission mechanism provided in the first aspect above.

[0029] Since the lock includes a top and bottom rod transmission mechanism, which has the same beneficial effects as the top and bottom rod transmission mechanism, it will not be elaborated here. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the main locking tongue mechanism of the top and bottom rod transmission mechanism in the first locked state and the top and bottom rod in the second locked state according to this embodiment.

[0032] Figure 2 for Figure 1 A structural diagram showing the main locking bolt mechanism after disassembly;

[0033] Figure 3 This is a schematic diagram of the structure of a top and bottom rod transmission mechanism in this embodiment, showing the main locking tongue mechanism in a first unlocked state and the top and bottom rod in a second unlocked state.

[0034] Figure 4 This is a schematic diagram of the structure of a top and bottom rod transmission mechanism in this embodiment, where the top and bottom rods are obstructed and the main locking tongue mechanism is in the first locked state.

[0035] Figure 5 This is a partial structural diagram of another embodiment.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100-lock case;

[0038] 200 - Main locking tongue mechanism, 210 - Guide section, 211 - First inclined surface;

[0039] 300-Top and bottom poles, 310-Drive unit, 311-Second inclined surface;

[0040] 410-Transmission plate, 420-Rotating shaft, 430-Stop part, 440-Sector tooth part, 450-Rack part;

[0041] 510 - Stop positioning part, 520 - Torsion spring;

[0042] 600-Top and bottom guide assembly, 610-Top and bottom slide rails, 620-Sliding pin;

[0043] 700 - Main lock guide assembly, 710 - Guide groove, 720 - Guide post. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0045] In the description of this embodiment, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this embodiment. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of this embodiment, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment according to the specific circumstances.

[0047] The following is combined with Figures 1 to 5 The following describes embodiments of the present invention.

[0048] According to a first aspect of the present invention, a top and bottom rod transmission mechanism is provided, including a lock housing 100. A main latch mechanism 200 is horizontally slidably disposed within the lock housing 100 via a main lock guide assembly 700. The main latch mechanism 200 has a first unlocked state where it retracts into the lock housing 100 and a first locked state where it extends out of the lock housing 100. A top and bottom rod 300 is vertically slidably disposed within the lock housing 100 via a top and bottom guide assembly 600. The top and bottom rod 300 has a second unlocked state where it retracts into the lock housing 100 and a second locked state where it extends out of the lock housing 100. A transmission mechanism is provided between the top and bottom rod 300 and the main latch mechanism 200. When the main bolt mechanism 200 switches from the first locked state to the first unlocked state, the main bolt mechanism 200 drives the top and bottom rods 300 to switch from the second locked state to the second unlocked state in one direction through the transmission mechanism. A main locking biasing component is provided between the main bolt mechanism 200 and the lock housing 100. The main locking biasing component is used to apply a main locking biasing force to the main bolt mechanism 200 to switch from the first unlocked state to the first locked state. A secondary locking biasing component is provided between the top and bottom rods 300 and the lock housing 100. The secondary locking biasing component is used to apply a secondary locking biasing force to the top and bottom rods 300 to switch from the second unlocked state to the second locked state.

[0049] In practical applications, the main locking force may not be the main locking bias force generated by the main locking bias component, but rather the force generated by rotating the key to lock the device.

[0050] This implementation example Figures 1 to 4 As shown, the transmission mechanism includes a transmission plate 410, which is rotatably mounted inside the lock housing 100 via a rotating shaft 420. The transmission plate 410 has a stop 430 at a position corresponding to the main lock tongue mechanism 200, which is used for the main lock tongue mechanism 200 to abut against. The outer side wall of the transmission plate 410 is provided with a fan-shaped toothed part 440. The top and bottom rods 300 have a rack part 450 on the side facing the transmission plate 410, which meshes with the fan-shaped toothed part 440.

[0051] In this embodiment, the secondary locking bias assembly includes a stop positioning part 510 and a torsion spring 520. The stop positioning part 510 is disposed inside the lock housing 100, and the stop positioning part 510 and the stop part 430 are spaced apart along the circumference of the rotating shaft 420. The torsion spring 520 is sleeved on the rotating shaft 420, and the torsion arm at the first end of the torsion spring 520 abuts against the stop part 430, and the torsion arm at the second end of the torsion spring 520 abuts against the stop positioning part 510.

[0052] like Figure 2 and Figure 3As shown, in this embodiment, the guiding and limiting functions of the top and bottom guide assembly 600 and the main lock guide assembly 700 improve the stability of the telescopic sliding movement of the top and bottom rods 300 and the main lock tongue mechanism 200. The specific structures of the top and bottom guide assembly 600 and the main lock guide assembly 700 can employ various existing conventional technologies. In this embodiment, the top and bottom guide assembly 600 includes a top and bottom sliding groove 610 and a sliding pin 620. The top and bottom sliding groove 610 is located on the lock housing 100, and the sliding pin 620 is located on the top and bottom rods 300. The sliding pin 620 is inserted into the top and bottom sliding groove 610 and slides vertically within the top and bottom sliding groove 610. Of course, in other embodiments, the top and bottom guide assembly 600 includes a top and bottom sliding groove 610 and a sliding pin 620. The top and bottom sliding groove 610 is located on the top and bottom rods 300, and the sliding pin 620 is located on the lock housing 100. The sliding pin 620 is inserted into the top and bottom sliding groove 610 and slides vertically within the top and bottom sliding groove 610.

[0053] The top and bottom guide assembly 600 also includes a sliding hole, which is vertically disposed on the opposite upper end face of the lock housing 100, and the top and bottom rods 300 are slidably disposed in the sliding hole. By adding a sliding hole for sliding engagement with the top and bottom rods 300, the stability of the top and bottom rods 300 moving in the vertical direction is further improved.

[0054] like Figure 1 As shown, in this embodiment, the main lock guide assembly 700 includes a guide groove 710 and a guide post 720. The guide groove 710 is disposed in the lock housing 100, and the guide post 720 is disposed in the main lock tongue mechanism 200. The guide post 720 is inserted into the guide groove 710 and slides horizontally within the guide groove 710. In other embodiments, the main lock guide assembly 700 also includes a guide groove 710 and a guide post 720. The guide groove 710 is disposed in the main lock tongue mechanism 200, and the guide post 720 is disposed in the lock housing 100. The guide post 720 is inserted into the guide groove 710 and slides horizontally within the guide groove 710.

[0055] like Figure 3 As shown, when the main latch mechanism 200 is driven by the key or handle mechanism to overcome the main locking bias pressure of the main locking bias assembly and push the stop part 430 to overcome the secondary locking bias pressure of the secondary locking bias assembly, moving towards the direction of retracting the lock housing 100, so that the main latch mechanism 200 switches from the first locked state to the first unlocked state, the main latch mechanism 200 first abuts against the stop part 430, and then transmits torque to the stop part 430 and pushes the transmission plate 410 to rotate counterclockwise. At this time, through the meshing transmission action of the sector tooth part 440 and the rack part 450, the top and bottom rods 300 are driven to retract into the lock housing 100, so that the top and bottom rods 300 switch to the second unlocked state. Figure 3As shown, during the process of switching the main latch mechanism 200 from the first locked state to the first unlocked state, the main latch mechanism 200 pushes the transmission plate 410 to rotate counterclockwise, causing the stop positioning part 510 to rotate close to the stop part 430, compressing the torsion spring 520 to store elastic potential energy for driving the transmission plate 410 to rotate clockwise, and switching the top and bottom levers 300 to the second unlocked state; and causing the main locking bias assembly and the auxiliary locking bias assembly to store energy for power storage. At this time, the main latch mechanism 200 is in the unlocked state, and at the same time, the auxiliary latch and / or the top and bottom latch driven by the top and bottom levers 300 are in the unlocked state, and the door can be opened freely.

[0056] like Figure 1 As shown, when the door is closed, the locking mechanism of the main bolt mechanism 200 is released through some known methods, allowing the main locking bias force of the main locking bias assembly to be released. This causes the main bolt mechanism 200 to move towards the direction of extending out of the lock housing 100, so that when the main bolt mechanism 200 switches from the first unlocked state to the first locked state, the energy stored in the secondary locking bias assembly is also gradually released. Under the action of the bias force generated by the release of the elastic potential energy of the torsion spring 520, the top and bottom rods 300 are pushed towards the direction of extending out of the lock housing 100, so that the top and bottom rods 300 switch from the second unlocked state to the second locked state. At the same time, the transmission plate 410 is driven to rotate clockwise to reset. When the main bolt mechanism 200 extends out of the lock housing 100 to switch to the first locked state, the top and bottom rods 300 are passively extended out of the lock housing 100 under the bias force of the secondary locking bias assembly, that is, as shown in the figure. Figure 4 As shown, the obstruction of the extension of the top and bottom rod 300 out of the lock housing 100 does not affect the extension of the main bolt mechanism 200 out of the lock housing 100. This ensures that even if the top and bottom rod 300 malfunctions and cannot extend the lock housing 100 normally to switch to the second locking state, the main bolt mechanism 200 can still extend the lock housing 100 normally to switch to the first locking state. Thus, during the time between the malfunction and the arrival of maintenance personnel, the security door equipped with the lock with the top and bottom rod transmission mechanism of this embodiment meets at least the standard requirements of a first-class security door, providing users with basic security protection.

[0057] It should be noted that, in this embodiment, the vertical end of the top and bottom bolt 300 extending from the lock housing 100 is provided with a top and bottom bolt and / or a secondary bolt. Here, the explanation focuses on the top and bottom bolt 300 being provided with a top and bottom bolt. When the top and bottom bolt 300 switches to the second unlocked state under the pushing action of the main bolt mechanism 200, the top and bottom bolts are pulled out from the corresponding bolt holes on the door frame or cabinet to achieve unlocking. When the top and bottom bolt 300 is passively extended from the lock housing 100 to switch to the second locked state under the biasing force generated by the energy released by the secondary locking biasing component, the top and bottom bolts are inserted into the corresponding bolt holes on the door frame or cabinet to achieve locking. If the top and bottom bolts are misaligned with the corresponding bolt holes on the door frame or cabinet due to installation errors or malfunctions, the top and bottom bolt 300 will not be able to extend from the lock housing 100 to switch to the second locked state normally.

[0058] It is understood that the sliding direction of the main latch mechanism 200 within the lock housing 100 is located in the same vertical plane as the vertical direction, and the sliding direction of the main latch mechanism 200 within the lock housing 100 is not parallel to the vertical direction. In this embodiment, it is preferable to arrange the sliding direction of the main latch mechanism 200 within the lock housing 100 perpendicular to the vertical direction, that is, in this embodiment, it is preferable to slide the main latch mechanism 200 horizontally within the lock housing 100; for ease of description, let's refer to... Figure 1 The vertical and horizontal directions are described as vertical and horizontal directions, but not as specific limitations on the vertical and horizontal directions.

[0059] It should be noted that when the top and bottom rods 300 malfunction and cannot be switched to the second locked state normally, it may be that the top and bottom rods 300 are not extended from the lock housing 100 at all, or it may be that only the lock housing 100 is partially extended. However, in either case, it will not affect the main bolt mechanism 200 from extending from the lock housing 100 to switch to the first locked state. Furthermore, during the process of switching the main bolt mechanism 200 from the first locked state to the first unlocked state, the movement of the main bolt mechanism 200 toward retracting the lock housing 100 will not be affected by the stop part 430, which has not been rotated clockwise to reset. In the case where the top and bottom rods 300 are only partially extended from the lock housing 100, after the main bolt mechanism 200 moves toward retracting the lock housing 100 and abuts the stop part 430, it can still normally push the transmission plate 410 to rotate counterclockwise, switching the top and bottom rods 300 to the second unlocked state.

[0060] It is understandable that, such as Figure 1 and Figure 2 As shown, in this embodiment, the transmission plate 410 is located on the side of the top and bottom rod 300 that is horizontally away from the main locking tongue mechanism 200. The clockwise and counterclockwise rotations mentioned in this embodiment are based on... Figure 1 Described from a perspective.

[0061] In other embodiments, the transmission plate 410 may also be located on the side of the top and bottom rods 300 facing the main locking mechanism 200 in the horizontal direction; on this basis, if the main locking mechanism 200 moves in the direction of retracting the lock case 100, the main locking mechanism 200 will push the transmission plate 410 to rotate clockwise, and through the meshing transmission action of the fan-shaped toothed part 440 and the rack part 450, drive the top and bottom rods 300 to retract the lock case 100.

[0062] In specific applications, the rack portion 450 is integrally formed with the top and bottom rods 300, that is, the rack portion 450 is formed by machining straight teeth arranged in a straight line on the side wall of the top and bottom rods 300 facing the transmission plate 410.

[0063] like Figures 1 to 3 As shown, specifically, the distance between the center of the stop portion 430 and the axis of the rotating shaft 420 along the radial direction of the rotating shaft 420 is greater than the pitch circle radius of the sector tooth portion 440, forming a structure similar to a "force-saving lever", so that the top and bottom rods 300 can be pushed to retract the lock housing 100 during the movement of the main locking tongue mechanism 200 in the direction of retracting the lock housing 100.

[0064] It should be noted that when the ground rod 300 malfunctions, causing the resistance preventing the ground rod 300 from extending out of the lock housing 100 to exceed the bias force generated by the torsion spring 520, and thus preventing the ground rod 300 from extending out of the lock housing 100, the main lock tongue mechanism 200 can still extend out of the lock housing 100 normally to switch to the first locked state because there is no structural connection between the main lock tongue mechanism 200 and the ground rod 300.

[0065] In some embodiments, the secondary locking biasing assembly includes an elastic element, one end of which is connected to the top and bottom rods 300 in the vertical direction, and the other end of which is connected to the lock housing 100. During the process of the main bolt mechanism 200 abutting against the top and bottom rods 300 and gradually pushing them towards the retracted lock housing 100, the elastic element is stretched or compressed, storing elastic potential energy. This ensures that during the process of switching the main bolt mechanism 200 from the first unlocked state to the first locked state, the top and bottom rods 300 are passively moved towards extending out of the lock housing 100 under the biasing force generated by the release of elastic potential energy from the elastic element. Simultaneously, it ensures that even if the top and bottom rods 300 malfunction and cannot properly extend out of the lock housing 100 to switch to the second locked state, the main bolt mechanism 200 can still properly extend out of the lock housing 100 to switch to the first locked state.

[0066] In practical applications, the elastic element can be set as a tension spring or a compression spring. When the elastic element is set as a tension spring, one end of the tension spring is connected to the upper end of the lock housing 100, and the other end is connected to the lower end of the top and bottom rods 300. When the top and bottom rods 300 move in the direction of retracting the lock housing 100, the tension spring is stretched and stores elastic potential energy. When the elastic element is set as a compression spring, one end of the compression spring is connected to the lower end of the lock housing 100, and the other end is connected to the top and bottom rods 300. When the top and bottom rods 300 move in the direction of retracting the lock housing 100, the compression spring is compressed and stores elastic potential energy.

[0067] like Figure 5 As shown, specifically, the main latch mechanism 200 has a guide portion 210 at one end facing the top and bottom rods 300 in the horizontal direction. The lower end of the guide portion 210 has a first inclined surface 211. The first inclined surface 211 extends horizontally close to the top and bottom rods 300 and gradually tilts upward in the vertical direction. The top and bottom rods 300 have a drive portion 310 on the side wall facing the main latch mechanism 200. The top end of the drive portion 310 is used to abut against the first inclined surface 211. With this configuration, as the main latch mechanism 200 moves toward the retracted lock housing 100, the top end of the drive portion 310 first abuts against the higher part of the first inclined surface 211, and the drive portion 310 gradually descends in the vertical direction under the push of the first inclined surface 211. This achieves the simultaneous stretching or compression of the elastic element and the movement of the top and bottom rods 300 toward the retracted lock housing 100 to switch to the second unlocking position.

[0068] In order to better propel the top and bottom rods 300 toward the retractable lock housing 100, more specifically, the top of the drive unit 310 is provided with a second inclined surface 311, and the second inclined surface 311 and the first inclined surface 211 have the same inclination angle.

[0069] like Figures 1 to 5As shown, according to a second aspect of the present invention, a lock is also provided, including the top and bottom rod transmission mechanism provided in the first aspect of the present invention. In this embodiment, the locking mechanism of the top and bottom rods is assembled separately into the lock housing 100 by the main bolt mechanism 200 and the top and bottom rods 300, i.e., the main bolt mechanism 200 and the top and bottom rods 300 are structurally integrated without any connection between them. A secondary locking biasing assembly is provided between the top and bottom rods 300 and the lock housing 100. When the main bolt mechanism 200 is driven to move in the direction of retracting the lock housing 100, switching the main bolt mechanism 200 from the first locked state to the first unlocked state, the main bolt mechanism 200 abuts against the top and bottom rods 300 and gradually pushes the top and bottom rods 300 in the direction of retracting the lock housing 100, switching the top and bottom rods 300 from the second locked state to the second unlocked state, and the secondary locking biasing assembly stores energy for power storage. When the main bolt mechanism 200 is driven to move in the direction of extending out of the lock housing 100, switching the main bolt mechanism 200 from the first unlocked state to the first locked state, the energy stored in the secondary locking biasing assembly is gradually released and pushes the top and bottom rods 300 out of the lock housing. The directional movement of 100 causes the top and bottom bolts 300 to switch from the second unlocked state to the second locked state. When the main bolt mechanism 200 extends out of the lock housing 100 to switch to the first locked state, the top and bottom bolts 300 are passively extended out of the lock housing 100 under the biasing force of the secondary locking biasing component. That is, the obstruction of the extension of the top and bottom bolts 300 out of the lock housing 100 does not affect the extension of the main bolt mechanism 200 out of the lock housing 100. This ensures that even if the top and bottom bolts 300 malfunction and cannot extend out of the lock housing 100 to switch to the second locked state, the main bolt mechanism 200 can still extend out of the lock housing 100 to switch to the first locked state. This ensures that the security door equipped with the lock of this embodiment meets at least the standard requirements of a first-level security door, providing users with basic security protection. Especially during the period from the occurrence of a malfunction to the arrival of a repairman, the security door equipped with the lock of this embodiment still meets at least the standard requirements of a first-level security door, providing users with basic security protection and effectively reducing the security risk of theft.

[0070] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the present invention.

Claims

1. A top and bottom rod transmission mechanism, characterized in that, include: Lock case (100); The main locking mechanism (200) is slidably disposed in the lock housing (100). The main locking mechanism (200) is subjected to unlocking force and main locking force, and switches between a first unlocked state in which the lock housing (100) is retracted and a first locked state in which the lock housing (100) is extended. The top and bottom rods (300) are slidably disposed in the lock housing (100); the top and bottom rods (300) have a second unlocked state retracted into the lock housing (100) and a second locked state extended from the lock housing (100); driven unidirectionally by the main bolt mechanism (200) switching from the first locked state to the first unlocked state, the top and bottom rods (300) switch from the second locked state to the second unlocked state; A secondary locking biasing assembly is provided between the top and bottom rods (300) and the lock housing (100); the top and bottom rods (300) are subjected to a secondary locking biasing force independent of the main locking force by the secondary locking biasing assembly, and tend to switch from the second unlocked state to the second locked state.

2. The top and bottom rod transmission mechanism according to claim 1, characterized in that, Inside the lock housing (100), a transmission mechanism is provided between the top and bottom rods (300) and the main locking tongue mechanism (200). The transmission mechanism is used to switch the linear motion of the main locking tongue mechanism (200) from the first locked state to the first unlocked state to the linear motion of the top and bottom rods (300) from the second locked state to the second unlocked state.

3. The top and bottom rod transmission mechanism according to claim 2, characterized in that, The transmission mechanism includes a stop (430) disposed on the main locking tongue mechanism (200) or the top and bottom rods (300); the main locking tongue mechanism (200) and the top and bottom rods (300) interact with each other through the stop (430).

4. The top and bottom rod transmission mechanism according to claim 3, characterized in that, The transmission mechanism includes: The transmission plate (410) is rotatably disposed inside the lock housing (100) via the rotating shaft (420). The stop part (430) is disposed on the transmission plate (410) and is positioned corresponding to the main locking tongue mechanism (200). The main locking tongue mechanism (200) abuts against the stop part (430) and drives the transmission plate (410) to rotate around the rotating shaft (420). A fan-shaped toothed portion (440) is disposed on the outer side wall of the transmission plate (410); The rack portion (450) meshes with the fan-shaped tooth portion (440), and the rack portion (450) is disposed on the side of the top and bottom rod (300) facing the transmission plate (410).

5. The top and bottom rod transmission mechanism according to claim 4, characterized in that, The secondary locking bias assembly includes: The stop positioning part (510) is fixedly disposed inside the lock housing (100); A torsion spring (520) is sleeved on the rotating shaft (420). The first end of the torsion spring (520) abuts against the stop part (430), and the second end of the torsion spring (520) abuts against the stop positioning part (510).

6. A top and bottom rod transmission mechanism according to any one of claims 1 to 5, characterized in that, The secondary locking bias assembly includes an elastic element, one end of which acts on the top and bottom rods (300), and the other end of which is connected to the lock housing (100).

7. The top and bottom rod transmission mechanism according to claim 1, characterized in that, The top and bottom rods (300) are slidably mounted on the lock housing (100) via the top and bottom guide assembly (600).

8. The top and bottom rod transmission mechanism according to claim 7, characterized in that, The top and bottom guide assembly (600) includes a sliding hole that is vertically disposed on the opposite upper end face of the lock housing (100) and through which the top and bottom rod (300) slides.

9. A top and bottom rod transmission mechanism according to claim 7 or 8, characterized in that, The top and bottom guiding component (600) includes: A top and bottom slide (610) is provided on either the top and bottom rods (300) or the lock housing (100); A sliding pin (620) is provided on the other of the top and bottom rods (300) and the lock housing (100), and the sliding pin (620) is slidably disposed in the top and bottom sliding groove (610) in the vertical direction.

10. The top and bottom rod transmission mechanism according to claim 1, characterized in that, The main bolt mechanism (200) is horizontally disposed within the lock housing (100) via the main lock guide assembly (700).

11. A lock, characterized in that, Includes the top and bottom rod transmission mechanism as described in any one of claims 1 to 10.

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