A fire door lock

Abstract

The application relates to a fireproof door lock which comprises an upper lock body and a lower lock body; the lower lock body comprises a lower lock shell and a lower lock rod which is connected with the lower lock shell in the up-down direction; the upper lock body comprises an upper lock shell, a clamping plate, a sliding rod which is connected with the upper lock shell in the up-down direction, an upper lock tongue which is rotationally connected with the upper lock shell, a clamping piece which is connected with the upper lock tongue, and a limiting piece which is located between the clamping piece and the sliding rod; the limiting piece is connected with the sliding rod; the upper lock tongue can drive the clamping piece to rotate to the lower side of the limiting piece; the upper end wall of the upper lock tongue is provided with a clamping groove which is used for clamping cooperation with the clamping plate; an intermediate lock shell is arranged between the sliding rod and the lower lock rod, the intermediate lock shell is provided with a sliding rod which is arranged in the up-down direction, and connecting rods are arranged between the sliding rod and the sliding rod and between the sliding rod and the lower lock rod; the intermediate lock shell is provided with a driving device which is used for driving the sliding rod to slide upwards; the lower lock rod can be kept separated from the ground after being unlocked, so that the possibility of wear of the lower lock rod or the ground is reduced.

Description

Technical Field

[0001] This application relates to the field of lock technology, and in particular to a fireproof door lock. Background Technology

[0002] A fire door lock is a type of lock used on fire doors; when a fire starts inside the door, the fire door lock will lock the door to prevent the spread of the fire. Types of fire door locks generally include push-type and push-down type.

[0003] A fire door lock, as shown in the reference Figure 1 The system includes an upper insert rod 1 for installation at the upper end of the door body, a lower insert rod 2 for installation at the lower end of the door body, and a bracket 3 located between the upper insert rod 1 and the lower insert rod 2. The length of the bracket 3 is set along the width of the door body. A horizontal push rod 31 is slidably installed on the bracket 3 along the thickness of the door body. The bracket 3 is provided with a connecting structure, which is connected to the horizontal push rod 31. An upper connecting rod 11 is connected between the connecting structure and the upper insert rod 1, and a lower insert rod 2 is connected between the connecting structure and the lower insert rod 2. Both the upper insert rod 1 and the lower insert rod 2 are respectively connected to a connecting spring 111 for driving themselves to move away from the bracket 3. When unlocking, press the horizontal push rod 31. The horizontal push rod 31 drives the upper connecting rod 11 and the lower connecting rod 21 to move towards the bracket 3 through the connecting structure, so that the upper insert rod 1 and the lower insert rod 2 disengage from the corresponding lock holes at the same time, allowing the door to rotate relative to the door frame. When closing, rotate the door. When the door rotates to the point where the upper insert rod 1 and the lower insert rod 2 are aligned with the corresponding lock holes, the connecting spring 111 allows the upper insert rod 1 and the lower insert rod 2 to be inserted into the corresponding lock holes, thereby restricting the rotation of the door and achieving the effect of locking the door.

[0004] Regarding the aforementioned technologies, the inventors believe that in order to ensure the flatness of the ground at the door frame location, it is sometimes necessary to directly open the lock hole that cooperates with the lower insertion rod (also known as the lower locking rod) on the ground; after the lower locking rod disengages from the corresponding lock hole, the door body is rotated and the horizontal push rod is released, and the connecting spring makes the lower locking rod abut against the ground; during the rotation of the door body, the lower locking rod rubs against the ground, which causes wear on the lower locking rod or the ground, so it needs to be improved. Summary of the Invention

[0005] The purpose of this application is to provide a fireproof door lock that keeps the lower locking bar separated from the ground after unlocking, thereby reducing the possibility of wear and tear on the lower locking bar or the ground.

[0006] The fire door lock provided in this application adopts the following technical solution:

[0007] A fireproof door lock includes an upper lock body and a lower lock body; the lower lock body includes a lower lock shell for fixing to the lower end of the door body and a lower lock rod that is slidably connected to the lower lock shell in a vertical direction;

[0008] The locking body includes an upper lock shell for fixing to the upper end of the door, a locking plate for fixing to the door frame or wall, a sliding rod that is slidably connected to the upper lock shell in the vertical direction, an upper lock tongue that is rotatably connected to the upper lock shell, a locking member connected to the upper lock tongue, and a limiting member located between the locking member and the sliding rod; the limiting member is connected to the sliding rod; when the sliding rod moves upward, the upper lock tongue can drive the locking member to rotate to below the limiting member so as to abut against the lower side of the limiting member; the upper end wall of the upper lock tongue is provided with a locking groove for engaging with the locking plate;

[0009] An intermediate lock housing for fixing to the door body is provided between the sliding rod and the lower locking rod. A sliding rod is provided in the intermediate lock housing in the vertical direction. Connecting rods are connected between the sliding rod and the sliding rod, and between the sliding rod and the lower locking rod. The intermediate lock housing is provided with a driving device for driving the sliding rod to slide upward.

[0010] By adopting the above technical solution, when unlocking, the sliding rod is moved upward by the driving device. The sliding rod moves the lower locking rod upward through the connecting rod, thereby separating the lower locking rod from the corresponding key hole and from the ground. When the sliding rod moves upward, it drives the sliding arm to move upward through the connecting rod. At this time, the door body is rotated, and the locking plate abuts against the inner wall of the locking groove, causing the upper locking tongue to rotate. This allows the upper locking tongue to drive the locking component to rotate, allowing the locking plate to separate from the locking groove. At the same time, the locking component moves to a position below the limiting component, so that the locking component abuts against the lower side of the limiting component, thereby restricting the downward movement of the sliding rod. This keeps the lower locking rod separated from the ground, reducing the possibility of the lower locking rod contacting the ground and thus reducing the possibility of wear on the lower locking rod or the ground.

[0011] When locking the door, rotate the door body, and the inner wall of the locking groove facing the locking plate abuts against the locking plate, causing the upper locking tongue to rotate, thereby moving the locking plate into the locking groove. At the same time, the locking component separates from the limiting component, and the sliding rod slides downward under its own weight and the weight of the connecting rod, so that the limiting component abuts against the locking component to support the locking component, thereby restricting the rotation of the upper locking tongue towards the sliding rod, achieving the effect of locking the upper end of the door body. When the sliding rod slides downward, the lower locking rod slides downward and inserts into the corresponding lock hole, achieving the effect of locking the lower end of the door body.

[0012] Optionally, the driving device includes a driving cam rotatably connected to the intermediate lock housing and a toggle lever rotatably connected to the intermediate lock housing; the sliding rod is provided with a driving groove for accommodating the driving cam, the upper side of the peripheral wall of the driving cam abuts against the inner end wall of the driving groove, and the toggle lever abuts against the lower side of the peripheral wall of the driving cam.

[0013] By adopting the above technical solution, rotating the lever can push the drive cam, causing the drive cam to push against the upper end wall of the drive groove, thereby driving the sliding rod to move upward. The structure is simple and the operation is convenient.

[0014] Optionally, the intermediate lock housing is rotatably provided with a mating rod for abutting against the side wall of the actuating lever in the direction of the drive cam; the mating rod is connected to an elastic drive member for driving it to push the actuating lever away from the drive cam.

[0015] By adopting the above technical solution, after the lever is released, the elastic drive component can push the lever against the drive cam through the cooperating rod, so that the lever is separated from the drive cam, allowing the drive cam to rotate in the direction of the lever, thereby reducing the magnitude of the force exerted by the drive cam on the sliding rod, so that the sliding rod can drive the sliding rod to move automatically downward.

[0016] Optionally, the actuating lever is provided with an elastic pad for abutting against the drive cam and / or the mating lever.

[0017] By adopting the above technical solution, the abutting pad helps to reduce the wear between the actuating lever and the drive cam or mating rod, and at the same time reduces the volume of the collision noise generated by the contact between the actuating lever and the drive cam or mating rod.

[0018] Optionally, the sliding rod includes two sliding blocks arranged sequentially in the vertical direction and a linkage rod connected to the two sliding blocks; the driving groove is provided on the linkage rod, and the linkage rod and / or the sliding blocks are used to connect with the connecting rod; the intermediate lock housing is provided with two sliding seats, each of the sliding seats having an insert groove along its length direction in the vertical direction; the insert groove corresponds one-to-one with the sliding block, and each sliding block is inserted into the corresponding insert groove; the sliding seat is provided with a limiting rod, one end of the limiting rod is connected to the sliding seat, and the other end is bent and extends to the side of the sliding block away from the bottom wall of the insert groove.

[0019] By adopting the above technical solution, the sliding block can slide within the mounting groove, and the limiting rod can restrict the movement of the sliding block along the depth direction of the mounting groove, so that the linkage rod can reciprocate stably in the vertical direction relative to the intermediate lock housing. Simultaneously, the inner end wall of each mounting groove can limit the extreme position of the corresponding sliding block in the vertical direction, thereby limiting the extreme position of the linkage rod and reducing the risk of the sliding block disengaging from the mounting groove. During assembly, the sliding block is first inserted into the corresponding mounting groove, and then the limiting rod is bent towards the sliding block; the operation is simple and convenient.

[0020] Optionally, the intermediate lock housing is provided with mounting parts for mounting the shaft of the drive cam on both the upper and lower sides of the drive rod.

[0021] By adopting the above technical solution, the drive cam can be installed in different mounting positions to accommodate doors with different opening methods. Definition: Doors can open in two ways: left-opening and right-opening. Left-opening door: A person stands outside the door and pushes it inward; the door's hinge is on the left side. Right-opening door: A person stands outside the door and pushes it inward; the door's hinge is on the right side.

[0022] Optionally, a fixing housing for fixing to the door body is provided at the position between the upper lock housing and the middle lock housing or / and at the position between the lower lock housing and the middle lock housing; an elastic component for driving the connecting rod to move downward is connected between the fixing housing and the connecting rod.

[0023] By adopting the above technical solution, after the drive device is released, the elastic component can drive the connecting rod to move downward, thereby causing the sliding rod to move downward. At the same time, the drive device can be reset, which helps to reduce the possibility of the sliding rod getting stuck and making it difficult for it to slide downward automatically.

[0024] Optionally, the elastic component includes a connecting slide plate that slides along the vertical direction and is slidably connected to the fixed housing, a rotating part that is rotatably connected to the fixed housing, a pushing part disposed at the upper and lower ends of the rotating part, a deflecting part disposed between the two pushing parts, a linkage part for abutting against the side of the two deflecting parts opposite to the connecting slide plate, and an elastic abutting member for pressing the linkage part against the deflecting part; the connecting slide plate is used to connect to the connecting rod; the pushing part and the deflecting part are both connected to the rotating part, and the linkage part is rotatably connected to the fixed housing; one end of the elastic abutting member is connected to the fixed housing, and the other end is connected to the linkage part; the rotating shaft of the rotating part is located between the two pushing parts; the connecting slide plate is provided with a deflecting hole for one end of the deflecting part to be inserted.

[0025] By adopting the above technical solution, when the connecting rod drives the connecting slide plate to move upward, the connecting slide plate drives the actuating part to rotate upward, so that the pushing part located in the lower position separates from the linkage part, and at the same time, the elastic deformation of the elastic abutment increases; after the drive device is released, the elastic abutment causes the linkage part to reset, so that the linkage part pushes against the pushing part located in the upper position, thereby resetting the rotating part, driving the connecting slide plate to reset, and thus driving the connecting rod to move downward to reset. When the mounting direction of the fixed housing is inverted, the elastic abutment, linkage part, pushing part, rotating part, actuating part, and connecting slide plate cooperate with each other, which can also drive the automatic connecting rod to move downward to reset.

[0026] The flexible abutment, linkage, pushing, rotating, actuating, and connecting slide cooperate with each other, which helps to reduce the requirements for the installation state of the fixed housing, thereby facilitating the installation operation of the fixed housing.

[0027] Optionally, the linkage is provided with a connecting latch extending to the outside of the fixed housing.

[0028] By adopting the above technical solution, the connecting bolt can lock the door in the fixed housing position, thereby improving the stability of the door locking. Meanwhile, the elastic abutment, linkage, pushing, rotating, actuating, and connecting slide cooperate with each other to facilitate application to doors with different opening methods.

[0029] Optionally, the sliding rod is provided with a positioning hole, and the upper lock housing is provided with a positioning pin inserted into the positioning hole; when the inner wall of the upper end of the positioning hole abuts against the positioning pin, the limiting member and the locking member are aligned to support the locking member.

[0030] By adopting the above technical solution, when the upper end wall of the positioning hole abuts against the positioning post, the limiting member and the snap-fit ​​member are aligned to support the snap-fit ​​member, thereby improving the accuracy of the limiting member supporting the snap-fit ​​member.

[0031] In summary, this application includes at least one of the following beneficial technical effects:

[0032] 1. The locking component and the limiting component work together. The locking component can restrict the downward movement of the limiting component, so as to keep the lower locking rod separated from the ground, reduce the possibility of the lower locking rod contacting the ground, and thus reduce the possibility of wear on the lower locking rod or the ground.

[0033] 2. The actuating lever, sliding lever, drive cam, and connecting rod work together to move the sliding lever upward by rotating the actuating lever. The structure is simple and easy to assemble and disassemble.

[0034] 3. The elastic abutment, linkage, pushing, rotating, actuating, connecting slide, and connecting lock tongue work together to improve the stability of the connecting rod driving the sliding rod downward, reduce the risk of the sliding rod jamming, and ensure the applicability of the fire door lock to doors with different opening methods. Attached Figure Description

[0035] Figure 1 This is a structural diagram of a fire door lock in related technologies.

[0036] Figure 2 This is a schematic diagram of the overall structure of a fire door lock according to an embodiment of this application.

[0037] Figure 3 yes Figure 2 Enlarged view of part A in the image.

[0038] Figure 4 It is an exploded diagram used to illustrate the structure of the drive unit.

[0039] Figure 5 This is a schematic diagram used to illustrate the connection structure between the linkage rod and the lower lock body.

[0040] Figure 6 This is a schematic diagram used to illustrate the connection structure between the linkage rod and the locking body.

[0041] Figure 7 It is along Figure 6 A cross-sectional view of the BB line in the diagram.

[0042] Figure 8 It is a schematic diagram used to show the state of the lock body after it is unlocked.

[0043] Figure 9 yes Figure 7 The abutment wheel is removed to illustrate the mating relationship between the positioning post and the positioning hole.

[0044] Figure 10 This is a schematic diagram used to illustrate the structure of the door latch.

[0045] Figure 11 This is a diagram showing the interaction between the actuating part and the connecting slide after removing the fixed housing.

[0046] Figure 12 This is a schematic diagram used to illustrate the usage status of embodiments of this application.

[0047] In the diagram, 1. Upper insert rod; 11. Upper connecting rod; 111. Connecting spring; 2. Lower insert rod; 21. Lower connecting rod; 3. Bracket; 31. Horizontal push rod; 4. Upper lock body; 41. Upper lock housing; 411. Abutting wheel; 42. Locking plate; 43. Sliding rod; 431. Positioning hole; 4311. Positioning pin; 432. Extension rod; 44. Upper lock tongue; 441. Snap-fit ​​groove; 45. Snap-fit ​​component; 46. Limiting component; 5. Lower lock body; 51. Lower lock housing; 5 11. Lower locking plate; 5111. Sliding hole; 52. Lower locking rod; 6. Intermediate lock body; 61. Intermediate lock housing; 611. Sliding seat; 6111. Fixed groove; 61111. Embedding groove; 61112. Clearance hole; 61113. Limiting rod; 6112. Limiting plate; 613. Matching rod; 6131. ​​Elastic driving component; 6132. Intermediate bolt; 62. Sliding rod; 621. Sliding block; 622. Linkage rod; 6221. 63. Drive slot; 631. Drive cam; 632. Actuating lever; 6321. Push rod; 63211. Elastic pad; 6322. Actuating lever; 63221. Buffer pad; 633. Fixing bracket; 634. Push rod; 7. Door latch body; 71. Fixed housing; 711. Limiting protrusion; 72. Elastic component; 721. Connecting slide plate; 7211. Actuating hole; 722. Rotating part; 723. Pushing part; 72 4. Actuating part; 725. Linkage part; 7251. Rotating block; 72511. Connecting lock tongue; 7252. Linkage rod; 726. Elastic abutment part; 8. Connecting rod; 81. Intermediate connecting rod; 811. Docking assembly; 8111. Docking rod; 8112. Docking sleeve; 8113. Pin; 812. Connecting assembly; 8121. Connecting plate; 8122. Fixing ring; 82. Sliding connecting rod; 821. Adjusting assembly; 9. Cover. Detailed Implementation

[0048] The following is in conjunction with the appendix Figure 2 -Appendix Figure 12 This application will be described in further detail below.

[0049] A fire door lock, as shown in the reference Figure 2The lock housing 61 includes an upper locking body 4, a lower locking body 5, an intermediate locking body 6, and a latch body 7. The upper locking body 4 is installed at the upper end of the door to fix the upper part of the door; the lower locking body 5 is installed at the lower end of the door to fix the lower part of the door; the intermediate locking body 6 is installed between the upper locking body 4 and the lower locking body 5; there are two latch bodies 7, one installed between the intermediate locking body 6 and the upper locking body 4, and the other installed between the intermediate locking body 6 and the lower locking body 5, to fix the corresponding positions of the door. Connecting rods 8 connect the intermediate locking body 6 to the upper locking body 4 and to the lower locking body 5; the latch body 7 is connected to the connecting rods 8, enabling the upper locking body 4, the lower locking body 5, the intermediate locking body 6, and the latch body 7 to move together. In another embodiment, the number of latch bodies 7 can be one, three, or more, and the number of latch bodies 7 located on the upper and lower sides of the intermediate lock housing 61 can be the same or different.

[0050] Reference Figure 2 and Figure 3 The intermediate lock body 6 includes an intermediate lock shell 61, a sliding rod 62 disposed on the intermediate lock shell 61, and a driving device 63 disposed on the intermediate lock shell 61. The intermediate lock shell 61 is formed by bending a metal plate and is approximately U-shaped. The bottom wall of the intermediate lock shell 61 on one side of its groove bottom can be fixed to the door body by bolts so that the length direction of the intermediate lock shell 61 is set in the vertical direction. The sliding rod 62 can slide up and down. The driving device 63 is used to drive the sliding rod 62 to slide upward. After the driving device 63 is released, the sliding rod 62 can automatically slide downward under its own gravity.

[0051] Reference Figure 3 and Figure 4 The intermediate lock housing 61 is provided with two sliding seats 611, both of which are located between the protective plates on both sides of the intermediate lock housing 61. The two sliding seats 611 are arranged alternately in the vertical direction. Each sliding seat 611 includes a fixed groove 6111 and a limiting plate 6112 located at one end of the fixed groove 6111 near the other fixed groove 6111. The fixed groove 6111 is U-shaped, with its length extending along the length of the intermediate lock housing 61, and the side wall of the fixed groove 6111 located at the bottom of its groove is welded and fixed to the bottom wall of the groove of the intermediate lock housing 61. The limiting plate 6112 is integrally formed and connected to the fixed groove 6111. The opening of the limiting plate 6112 is aligned with the corresponding end of the groove of the fixed groove 6111, and the inner side wall of the fixed groove 6111 and the limiting plate 6112 together form an embedded groove 61111. The term "guard plate" as used in this application refers to a plate used to form the inner wall of the groove of the tank body; the width direction of the guard plate is set along the depth direction of the groove of the corresponding tank body.

[0052] Reference Figure 3 and Figure 4 The sliding rod 62 includes two sliding blocks 621 and a linkage rod 622. Each sliding block 621 corresponds one-to-one with a corresponding slot 61111, and each sliding block 621 is inserted into its corresponding slot 61111. One end of the linkage rod 622 is integrally formed and connected to one of the sliding blocks 621, and the other end is integrally formed and connected to the other sliding block 621. The two limiting plates 6112 cooperate to limit the extreme sliding positions of the sliding blocks 621, thereby reducing the risk of each sliding block 621 disengaging from its corresponding slot 61111.

[0053] Reference Figure 3 and Figure 4 Each fixed groove 6111 has a clearance hole 61112 on one side of its guard plate along its width direction. The clearance hole 61112 is provided through one end of the fixed groove 6111 along its length direction. The part of the fixed groove 6111 located on the side of the clearance hole 61112 away from the bottom wall of the embedding groove 61111 forms a limiting rod 61113. The side wall of the limiting rod 61113 facing the bottom wall of the embedding groove 61111 is flush with the side wall of the sliding block 621 away from the bottom wall of the embedding groove 61111. The limiting rod 61113 is bent towards the sliding block 621 so that the limiting rod 61113 is bent to the position of the sliding block 621 away from the bottom wall of the embedding groove 61111, so as to restrict the movement of the sliding block 621 along the depth direction of the embedding groove 61111. In another embodiment, the end of the limiting rod 61113 near the fixing groove 6111 can also be welded and fixed to the fixing groove 6111.

[0054] Reference Figure 3 and Figure 4 The drive device 63 includes a drive cam 631 and a lever 632. The lever 632 includes a push rod 6321 and an actuating rod 6322 integrally formed and connected to one end of the push rod 6321. The end of the actuating rod 6322 away from the push rod 6321 extends along the length direction of the push rod 6321 in a direction away from the push rod 6321 and is inclined in a direction away from the inner bottom wall of the intermediate lock housing 61. Both sides of the two limiting plates 6112 that are close to each other are mounting parts; the drive cam 631 is approximately fan-shaped, and the position of the drive cam 631 near its own center is rotatably connected to the mounting part located above by a rotating shaft, and the axis of the rotating shaft of the drive cam 631 is set along the width direction of the middle lock shell 61; the linkage rod 622 is integrally formed with a through drive groove 6221 along the depth direction of the embedded groove 61111, and the end of the drive cam 631 away from its own rotating shaft is inserted into the drive groove 6221, and the upper side of the peripheral wall of the drive cam 631 abuts against the end wall of the upper end of the drive groove 6221.

[0055] Reference Figure 3 and Figure 4 The push rod 6321 is located between the two limiting plates 6112, and its length is along the width of the intermediate lock housing 61. The end of the push rod 6321 closest to the actuator 6322 is rotatably connected to the intermediate lock housing 61 via a pivot shaft, the shaft of which is axially aligned vertically. The end of the push rod 6321 furthest from the actuator 6322 is located between the drive cam 631 and the inner bottom wall of the intermediate lock housing 61; the push rod 6321 abuts against the lower side of the peripheral wall of the drive cam 631. Pushing the actuator 6322 towards the inner bottom wall of the intermediate lock housing 61 causes the push rod 6321 to rotate away from the bottom wall of the intermediate lock housing 61, thus pushing the drive cam 631, which in turn causes the linkage rod 622 to move upwards.

[0056] Reference Figure 3 and Figure 4 The drive device 63 further includes a fixing bracket 633 for fixed installation on the door body and a push rod 634 slidably connected to the fixing bracket 633 along the depth direction of the intermediate lock housing 61; the end of the actuator 6322 away from the push rod 6321 is located between the push rod 634 and the fixing bracket 633, and pushing the push rod 634 will push the actuator 6322. The structure of the push rod 634 and the fixing bracket 633, as well as the connection structure between them, have been fully disclosed in related technologies and will not be described in detail in this embodiment. The actuator 6322 is provided with a pin, and the pin is fitted with a plurality of buffer pads 63221; the buffer pads 63221 are made of rubber and can abut against the push rod 634 to reduce the collision intensity and collision noise between the push rod 634 and the actuator 6322.

[0057] Reference Figure 3 and Figure 4A mating rod 613 is provided on the protective plate of the intermediate lock housing 61 along its width direction and away from the actuating rod 6322. One end of the mating rod 613 is rotatably connected to the protective plate of the intermediate lock housing 61 via a rotating shaft, the shaft being axially oriented vertically. The other end of the mating rod 613 extends to the side of the push rod 6321 opposite to the inner bottom wall of the intermediate lock housing 61. The mating rod 613 is provided with an elastic driving member 6131, which includes a torsion spring. The elastic driving member 6131 is sleeved on the rotating shaft of the mating rod 613, and one end of the elastic driving member 6131 is connected to the protective plate of the intermediate lock housing 61, while the other end is connected to the mating rod 613, so that the mating rod 613 abuts against the push rod 6321, facilitating the reset of the push rod 6321. A central latch 6132 is integrally formed along the length of the mating rod 613, located on the side of its axis of rotation away from the push rod 6321. The end of the central latch 6132 away from the mating rod 613 extends along the depth direction of the central lock housing 61 towards the inner bottom wall of the central lock housing 61. The central latch 6132 is used to abut against another door or door frame to fix the corresponding position of the door. When the push rod 6321 rotates away from the inner bottom wall of the central lock housing 61, the mating rod 613 drives the central latch 6132 to rotate, causing the central latch 6132 to rotate inwards towards the central lock housing 61, thereby unlocking the central latch 6132.

[0058] Reference Figure 3 and Figure 4 The push rod 6321 is provided with an elastic pad 63211, which includes a rubber pad. The elastic pad 63211 is annular and connected to the push rod 6321 via a pin to abut against the mating rod 613, thereby reducing the collision between the mating rod 613 and the push rod 6321. In another embodiment, the elastic pad 63211 may also be provided between the push rod 6321 and the drive cam 631, or the elastic pad 63211 may be provided at positions between the push rod 6321, the drive cam 631, and the mating rod 613.

[0059] Reference Figure 2 and Figure 5 The connecting rod 8 includes an intermediate connecting rod 81 and a sliding connecting rod 82. The intermediate connecting rod 81 is located between the linkage rod 622 and the door latch body 7, and the sliding connecting rod 82 is located between the door latch body 7 and the lower lock body 5. One end of the intermediate connecting rod 81 is connected to the linkage rod 622, and the other end is connected to the door latch body 7; one end of the sliding connecting rod 82 is connected to the door latch body 7, and the other end is connected to the lower lock body 5, so that the linkage rod 622 can drive the lower lock body 5 to move.

[0060] Reference Figure 5The latch body 7 includes a fixed housing 71 and an elastic component 72, the elastic component 72 including a connecting slide plate 721. The fixed housing 71 is U-shaped, and the side wall of the bottom of the fixed housing 71 can be fixed to the door body by bolts, so that the length direction of the fixed housing 71 is set in the vertical direction. The connecting slide plate 721 is located inside the fixed housing 71 and the side wall of the connecting slide plate 721 is in contact with the inner bottom wall of the fixed housing 71, so that the connecting slide plate 721 can slide relative to the fixed housing 71 in the vertical direction. The guard plates on both sides of the fixed housing 71 are integrally formed with limiting protrusions 711. The limiting protrusions 711 abut against the side wall of the connecting slide plate 721 opposite to the inner bottom wall of the fixed housing 71, so as to restrict the movement of the connecting slide plate 721 along the depth direction of the fixed housing 71, thereby improving the stability of the sliding of the connecting slide plate 721.

[0061] Reference Figure 5 The lower lock body 5 includes a lower lock shell 51 and a lower lock rod 52. The lower lock shell 51 can be fixed to the door body with bolts; the lower lock shell 51 has two lower lock plates 511 arranged sequentially in the vertical direction, and each of the two lower lock plates 511 has a sliding hole 5111 extending through in the vertical direction; the lower lock rod 52 is inserted through the two sliding holes 5111 so that the lower lock rod 52 can slide up and down relative to the lower lock shell 51. A docking assembly 811 is provided between one end of the intermediate connecting rod 81 and the sliding block 621 at the lower end of the linkage rod 622; the docking assembly 811 includes a docking rod 8111 integrally formed and connected to the sliding block 621, a docking sleeve 8112 welded and fixed to the intermediate connecting rod 81, and a pin 8113. Both the connecting rod 8111 and the connecting sleeve 8112 have pin holes through them; the connecting sleeve 8112 is fitted onto the connecting rod 8111, and the pin hole on the connecting sleeve 8112 is aligned with the pin hole on the connecting rod 8111. Then, the pin 8113 is inserted into the pin hole to connect the connecting rod 8111 and the connecting sleeve 8112.

[0062] Reference Figure 5 A connecting assembly 812 is provided between the end of the intermediate connecting rod 81 furthest from the linkage rod 622 and the end of the connecting slide plate 721 closest to the linkage rod 622. The connecting assembly 812 includes a connecting plate 8121 and a retaining ring 8122. The connecting plate 8121 is integrally formed and connected to the connecting slide plate 721, and a connecting hole is formed through the connecting plate 8121 in the vertical direction. The intermediate connecting rod 81 is inserted into the connecting hole. There are two retaining rings 8122, both of which are threaded to the peripheral wall of the intermediate connecting rod 81. One retaining ring 8122 is located on the upper side of the connecting plate 8121, and the other retaining ring 8122 is located on the lower side of the connecting plate 8121. The two retaining rings 8122 cooperate with each other to clamp the connecting plate 8121, thereby fixing the intermediate connecting rod 81 to the connecting plate 8121. When the linkage rod 622 moves upward, it can drive the intermediate connecting rod 81 and the connecting slide plate 721 to move upward.

[0063] Reference Figure 5 One end of the sliding link 82 is connected to the lower end of the connecting slide plate 721 via a connecting assembly 812. An adjusting assembly 821 is connected between the end of the sliding link 82 away from the connecting slide plate 721 and the lower locking rod 52. The structure of the adjusting assembly 821 is the same as that of the connecting assembly 812. The connecting plate 8121 of the adjusting assembly 821 is welded to the sliding link 82, and the fixing ring 8122 of the adjusting assembly 821 is threadedly connected to the peripheral wall of the lower locking rod 52. When the connecting slide plate 721 slides upward, it drives the sliding link 82 to slide upward, thereby causing the lower locking rod 52 to move upward, so that the lower locking rod 52 disengages from the lock hole located on the ground or at the bottom of the door frame, thus separating the lower locking rod 52 from the ground.

[0064] Reference Figure 6 The upper sliding block 621 of the linkage rod 622 is connected to the locking body 4 in sequence through the intermediate connecting rod 81, the connecting slide plate 721 and the sliding connecting rod 82, so as to drive the locking body 4 to move; when the linkage rod 622 moves upward, the corresponding sliding connecting rod 82 moves upward.

[0065] Reference Figure 6 and Figure 7 The locking body 4 includes a locking shell 41, a locking plate 42, a sliding rod 43, a locking tongue 44, a locking member 45, and a limiting member 46. The locking shell 41 is U-shaped, and the side wall of the locking shell 41 located at the bottom of its groove can be fixed to the door body by bolts so that the length direction of the locking shell 41 is set in the vertical direction. The sliding rod 43 is located inside the locking shell 41, and the locking shell 41 is rotatably connected to an abutment wheel 411. The abutment wheel 411 abuts against the side of the connecting slide plate 721 opposite to the bottom wall of the locking shell 41, so that the side wall of the sliding rod 43 fits against the inner bottom wall of the locking shell 41, thereby restricting the movement of the sliding rod 43 along the depth direction of the locking shell 41, so that the sliding rod 43 can slide stably relative to the locking shell 41 in the vertical direction. The upper locking tongue 44 is rotatably connected to the inner wall of the upper lock housing 41 via a pivot. The axis of the pivot of the upper locking tongue 44 is set along the width direction of the upper lock housing 41. The pivot of the upper locking tongue 44 is located at the lower end of the upper locking tongue 44 and is located on the side of the upper locking tongue 44 close to the inner bottom wall of the upper lock housing 41 along its own width direction. The locking plate 42 can be fixedly installed on the top of the door frame or on the wall located at the upper end of the door body by bolts, so that the end of the locking plate 42 away from the door frame or wall extends downward. The upper end wall of the upper locking tongue 44 has an integrally formed downward locking groove 441, and the locking plate 42 is embedded in the locking groove 441.

[0066] Reference Figure 6 and Figure 8The latching member 45 includes an arc-shaped block; one end of the latching member 45 is integrally formed and connected to the lower end wall of the upper locking tongue 44 and the side away from the pivot of the upper locking tongue 44, and the other end extends downward and bends and tilts towards the sliding rod 43. The limiting member 46 is block-shaped; the limiting member 46 is integrally formed on the side wall of the sliding rod 43 facing the latching member 45; the limiting member 46 abuts against the lower end of the latching member 45 to support the latching member 45, thereby abutting the side wall of the upper locking tongue 44 near its pivot with the inner bottom wall of the upper lock housing 41, thereby keeping the locking plate 42 and the locking groove 441 in a latching engagement state. The lower end of the sliding rod 43 is hinged to an extension rod 432, and the extension rod 432 is connected to the upper end of the sliding link 82 through the adjusting assembly 821. When the sliding link 82 moves upward, the sliding rod 43 drives the limiting member 46 to move upward, so that the limiting member 46 disengages from the locking member 45. At this time, when the door is opened, the door moves the upper lock shell 41, so that the upper lock tongue 44 moves relative to the locking plate 42, thereby causing the upper lock tongue 44 to rotate, so that the locking member 45 moves to a position below the limiting member 46, so that the locking member 45 can abut against the lower end wall of the limiting member 46, thereby restricting the downward movement of the limiting member 46 and the sliding rod 43, thereby keeping the sliding rod 43 fixed.

[0067] Reference Figure 9 A positioning hole 431 is provided through the sliding rod 43 along the depth direction of the upper lock shell 41. A positioning pin 4311 is inserted into the positioning hole 431 and is welded and fixed to the inner bottom wall of the upper lock shell 41. When the door is closed, the upper lock tongue 44 can abut against the locking plate 42. The locking plate 42 can rotate the upper lock tongue 44 to drive the locking member 45 to move away from the sliding rod 43, so that the sliding rod 43 can drive the limiting member 46 to slide downward. When the upper end wall of the positioning hole 431 abuts against the positioning pin 4311, the sliding rod 43 stops moving, and the limiting member 46 aligns with the locking member 45 to support the locking member 45, thereby fixing the upper lock tongue 44.

[0068] Reference Figure 10 and Figure 11The elastic component 72 also includes a rotating part 722, a pushing part 723, a deflecting part 724, a linkage part 725, and an elastic abutting member 726. The rotating part 722, pushing part 723, deflecting part 724, linkage part 725, and elastic abutting member 726 are all located on the side of the connecting slide plate 721 opposite to the inner bottom wall of the fixed housing 71. The rotating part 722 is plate-shaped, and its length is along the length of the fixed housing 71. The middle position of the rotating part 722 is rotatably connected to a guard plate on one side of the fixed housing 71 via a pivot, allowing either end of the rotating part 722 to move closer to or away from the connecting slide plate 721. The deflecting part 724 is plate-shaped, with one side integrally formed and connected to the middle position of the rotating part 722. The tip of the other side of the deflecting part 724 extends along the depth direction of the fixed housing 71 towards the connecting slide plate 721. A connecting slide plate 721 has a through-hole 7211; one end of the actuating part 724 near the connecting slide plate 721 is inserted into the actuating hole 7211. When the connecting slide plate 721 slides upward, it drives the actuating part 724 to rotate, causing the rotating part 722 to rotate, thereby causing the upper end of the rotating part 722 to rotate away from the connecting slide plate 721. In this embodiment, the rotating part 722 and the actuating part 724 are integrally formed, and the whole is triangular in shape.

[0069] Reference Figure 10 and Figure 11 There are two pushing parts 723, both of which are cylindrical and their axial directions are both along the width direction of the fixed housing 71. One pushing part 723 is welded and fixed to the upper end of the rotating part 722, and the other pushing part 723 is welded and fixed to the lower end of the rotating part 722. The linkage part 725 includes a rotating block 7251 and a linkage rod 7252 welded and fixed to the rotating block 7251. The rotating block 7251 is rotatably connected to the guard plate on the side of the fixed housing 71 away from the rotating part 722 via a rotating shaft. One end of the linkage rod 7252 is located on the side of one of the pushing parts 723 away from the inner bottom wall of the fixed housing 71, and the other end is located on the side of the other pushing part 723 away from the inner bottom wall of the fixed housing 71. The elastic abutment 726 includes a torsion spring, which is sleeved on the rotating shaft of the rotating block 7251. One end of the elastic abutment 726 is connected to the rotating block 7251, and the other end is connected to the protective plate of the fixed housing 71, so that the linkage rod 7252 and the abutment part 723 are kept pressed together. When the locking body 4 is unlocked, the elastic abutment 726 presses the abutment part 723 through the linkage rod 7252, so that the rotating part 722 rotates and resets, thereby causing the actuating part 724 to drive the connecting slide plate 721 to slide downward.

[0070] Reference Figure 10 and Figure 11The rotating block 7251 has an integrally formed connecting latch 72511 at the end away from the linkage rod 7252. The end of the connecting latch 72511 away from the rotating block 7251 extends along the width direction of the fixed housing 71 and is inclined towards the inner bottom wall of the fixed housing 71. When the connecting slide plate 721 slides downward, the rotating block 7251 drives the connecting latch 72511 to rotate away from the rotating part 722, so that the connecting latch 72511 moves to the outside of the fixed housing 71 to lock the corresponding position of the door.

[0071] Reference Figure 2 and Figure 12 The intermediate lock body 6, the bolt lock body 7, the upper lock body 4, and the lower lock body 5 are all equipped with covers 9. Each cover 9 covers the corresponding intermediate lock shell 61, fixed shell 71, upper lock shell 41, and lower lock shell 51 to achieve dustproof and other protective effects.

[0072] The implementation principle of this application embodiment is as follows:

[0073] When the door is closed, the latch plate 42 abuts against the bolt, causing the bolt to rotate, thereby disengaging the latching member 45 from the limiting member 46, allowing the sliding rod 43 to slide downwards. This allows the limiting member 46 to support the latching member 45, ensuring a stable fit between the latch plate 42 and the latching groove 441. Simultaneously, the lower locking rod 52 is inserted into the corresponding lock hole on the ground, thus locking the door. When the door is opened, the push rod 634 is pressed, which drives the actuating rod 632 to rotate, causing the drive cam 631 to push the sliding rod 62 upward. The sliding rod 62 drives the sliding rod 43 to slide upward through the connecting rod 8, so that the limiting member 46 disengages from the locking member 45, and at the same time, the lower locking rod 52 disengages from the corresponding lock hole. At this time, the door body is rotated, and the upper locking tongue 44 rotates accordingly, so that the locking member 45 abuts against the lower side of the limiting member 46, thereby limiting the downward movement of the limiting member 46, fixing the sliding rod 43, and thus fixing the lower locking rod 52, so that the lower locking rod 52 remains separated from the ground, thereby reducing the possibility of wear caused by contact between the lower locking rod 52 and the ground.

[0074] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fireproof door lock, comprising an upper lock body (4) and a lower lock body (5); the lower lock body (5) includes a lower lock housing (51) for fixing to the lower end of the door body and a lower lock rod (52) slidably connected to the lower lock housing (51) in a vertical direction; characterized in that: The upper lock body (4) includes an upper lock shell (41) for fixing to the upper end of the door body, a locking plate (42) for fixing to the door frame or wall, a sliding rod (43) that slides and is connected to the upper lock shell (41) in the vertical direction, an upper lock tongue (44) that is rotatably connected to the upper lock shell (41), a locking member (45) connected to the upper lock tongue (44), and a limiting member (46) located between the locking member (45) and the sliding rod (43); the limiting member (46) is connected to the sliding rod (43); when the sliding rod (43) moves upward, the upper lock tongue (44) can drive the locking member (45) to rotate to the lower side of the limiting member (46) to abut against the lower side of the limiting member (46); the upper end wall of the upper lock tongue (44) is provided with a locking groove (441) for engaging with the locking plate (42). An intermediate lock housing (61) for fixing to the door body is provided between the sliding rod (43) and the lower locking rod (52). The intermediate lock housing (61) is provided with a sliding rod (62) that slides vertically. A connecting rod (8) is connected between the sliding rod (62) and the sliding rod (43) and between the sliding rod (62) and the lower locking rod (52). The intermediate lock housing (61) is provided with a driving device (63) for driving the sliding rod (62) to slide upward.

2. The fire door lock according to claim 1, characterized in that: The drive device (63) includes a drive cam (631) rotatably connected to the intermediate lock housing (61) and a lever (632) rotatably connected to the intermediate lock housing (61); the sliding rod (62) is provided with a drive groove (6221) for accommodating the drive cam (631), the upper side of the peripheral wall of the drive cam (631) abuts against the inner end wall of the drive groove (6221), and the lever (632) abuts against the lower side of the peripheral wall of the drive cam (631).

3. The fire door lock according to claim 2, characterized in that: The intermediate lock housing (61) is rotatably provided with a mating rod (613) for abutting against the side wall of the lever (632) in the direction of the drive cam (631); the mating rod (613) is connected to an elastic drive member (6131) for driving it to push the lever (632) away from the drive cam (631).

4. The fire door lock according to claim 3, characterized in that: The actuating lever (632) is provided with an elastic pad (63211) for abutting against the drive cam (631) and / or the mating lever (613).

5. The fire door lock according to claim 2, characterized in that: The sliding rod (62) includes two sliding blocks (621) arranged sequentially in the vertical direction and a linkage rod (622) connected to the two sliding blocks (621); the driving groove (6221) is provided on the linkage rod (622), and the linkage rod (622) and / or the sliding blocks (621) are used to connect with the connecting rod (8); the intermediate lock housing (61) is provided with two sliding seats (611), each of the sliding seats (611) is provided with an embedding groove (61111) along its length, the embedding groove is provided with an embedding groove (611111) along its length. The groove (61111) is arranged along the vertical direction; the embedded groove (61111) corresponds one-to-one with the sliding block (621), and each sliding block (621) is inserted into the corresponding embedded groove (61111). The sliding seat (611) is provided with a limiting rod (61113). One end of the limiting rod (61113) is connected to the sliding seat (611), and the other end is bent and extended to the side of the sliding block (621) away from the bottom wall of the embedded groove (61111).

6. The fire door lock according to claim 2, characterized in that: The intermediate lock housing (61) is provided with mounting parts for the shaft of the drive cam (631) on both the upper and lower sides of the drive rod.

7. The fire door lock according to claim 1, characterized in that: A fixing housing (71) for fixing to the door body is provided at the position between the upper locking housing (41) and the middle locking housing (61) or / and at the position between the lower locking housing (51) and the middle locking housing (61); an elastic component (72) for driving the connecting rod (8) to move downward is connected between the fixing housing (71) and the connecting rod (8).

8. The fire door lock according to claim 7, characterized in that: The elastic component (72) includes a connecting slide plate (721) that is slidably connected to the fixed housing (71) in the vertical direction, a rotating part (722) that is rotatably connected to the fixed housing (71), a pushing part (723) disposed at the upper and lower ends of the rotating part (722), a pushing part (724) disposed between the two pushing parts (723), a linkage part (725) for abutting against the side of the two pushing parts (724) away from the connecting slide plate (721), and an elastic abutting member (726) for pressing the linkage part (725) against the pushing part (724). The connecting slide plate (721) is used to connect with the connecting rod (8); the pushing part (723) and the actuating part (724) are both connected to the rotating part (722); the linkage part (725) is rotatably connected to the fixed housing (71); one end of the elastic abutment (726) is connected to the fixed housing (71), and the other end is connected to the linkage part (725); the rotating shaft of the rotating part (722) is located between the two pushing parts (723); the connecting slide plate (721) is provided with an actuating hole (7211) for one end of the actuating part (724) to be inserted.

9. The fire door lock according to claim 8, characterized in that: The linkage (725) is provided with a connecting latch (72511) extending to the outside of the fixed housing (71).

10. The fire door lock according to claim 1, characterized in that: The sliding rod (43) is provided with a positioning hole (431) through it, and the upper lock shell (41) is provided with a positioning post (4311) inserted into the positioning hole (431); when the inner wall of the upper end of the positioning hole (431) abuts against the positioning post (4311), the limiting member (46) aligns with the snap-fit ​​member (45) to support the snap-fit ​​member (45).

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