Bolt structure for door

Abstract

The utility model belongs to the technical field of bolts, and discloses a bolt structure for a door, which is characterized in that a panel is mounted on one side of an auxiliary door, and a shell is mounted inside the auxiliary door; the upper thrust pin is slidably connected to the upper portion of the shell in the vertical direction. The lower thrust pin is slidably connected to the lower portion of the shell in the vertical direction. The upper transmission rack and the lower transmission rack are both slidably connected into the shell, the transmission gear is rotatably connected into the shell, the two sides of the transmission gear are meshed with the upper transmission rack and the lower transmission rack respectively, the upper end of the upper transmission rack is fixedly connected with the upper thrust pin, and the lower end of the lower transmission rack is fixedly connected with the lower thrust pin. A vertical sliding cavity is formed in the shell, a sliding block is slidably connected into the vertical sliding cavity, and a driving mechanism is installed at one end of the shell. According to the utility model, electric control of door opening and door locking is realized, and the problems that old people and children are difficult to operate and great inconvenience is brought to the operation of users are solved.

Description

Technical Field

[0001] This utility model belongs to the field of bolt technology, specifically relating to a bolt structure for doors. Background Technology

[0002] Existing door bolts are manually operated with handles and are used on double doors or mother-daughter doors (copper doors, armored doors, wooden doors, etc.). The bolts are installed on the secondary door leaf of the mother-daughter / double door. When the main door is open, the manual operating handle is visible. Lifting or pressing the handle controls the up and down movement of the upper and lower bolt shafts to close and open the door. This is difficult for the elderly and children to operate and causes great inconvenience to users. With the development of technology, electrically controlled door bolts have become an urgent market demand. Utility Model Content

[0003] The purpose of this invention is to provide a door latch structure to solve the aforementioned problems existing in the prior art.

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

[0005] A door latch structure is installed on the secondary door of a double door, including a panel, a housing, an upper push pin and a lower push pin. The panel is installed on the side of the secondary door near the main door, and the housing is installed inside the secondary door behind the panel.

[0006] The upper thrust pin is slidably connected to the upper part of the housing in the vertical direction, and one end of the upper thrust pin is connected to the upper pin through the upper pin connecting rod, so as to push the upper pin into the fixed door frame above the secondary door by sliding the upper thrust pin upward.

[0007] The lower thrust pin is slidably connected to the lower part of the housing in the vertical direction, and one end of the lower thrust pin is connected to the lower pin through the lower pin connecting rod, so as to push the lower pin into the ground plane below the sub-door by sliding the lower thrust pin downward.

[0008] The housing is equipped with a linkage assembly, which includes an upper transmission rack, a lower transmission rack, and a transmission gear. The upper and lower transmission racks are slidably connected to the housing, and the transmission gear is rotatably connected to the housing. The two sides of the transmission gear mesh with the lower part of the upper transmission rack and the upper part of the lower transmission rack, respectively. The upper end of the upper transmission rack is fixedly connected to the upper thrust pin, and the lower end of the lower transmission rack is fixedly connected to the lower thrust pin.

[0009] A vertical sliding cavity is provided inside the housing on the back of the linkage component. A sliding block is slidably connected inside the vertical sliding cavity to drive the upper transmission rack to slide inside the housing. A driving mechanism is installed at one end of the housing to drive the sliding block to slide inside the vertical sliding cavity.

[0010] As a preferred technical solution of this utility model, the driving mechanism includes a first motor installed at one end of the housing, and a transmission screw extending in a vertical direction is connected to the motor shaft of the first motor. The transmission screw is threadedly connected to the sliding block.

[0011] As a preferred technical solution of this utility model, the back of the upper transmission rack is connected to a sliding groove base that is slidably connected to the housing in the vertical direction. A transverse sliding cavity is provided on the sliding groove base, and a stop block is slidably connected in the transverse sliding cavity. A limit groove is provided on the side of the sliding block facing the sliding groove base, and one end of the stop block is inserted into the limit groove.

[0012] As a preferred technical solution of this utility model, a lever arm is installed on the slide base. The middle part of the lever arm is rotatably connected to the slide base by a torsion spring. One end of the lever arm is provided with a long strip limiting hole. A limiting rod is connected to one side of the stop block and the limiting rod is inserted into the long strip limiting hole. A manual control hole is opened in the middle of the upper transmission rack, and the manual control hole is correspondingly set to the other end of the lever arm. A long strip clearance hole extending in the vertical direction is opened on the surface of the panel, and the manual control hole is correspondingly set to the long strip clearance hole.

[0013] As a preferred technical solution of this utility model, the elongated clearance hole is a snap-fit ​​hole, and a decorative cover located on the panel surface is snapped into the elongated clearance hole.

[0014] As a preferred technical solution of this utility model, the upper part of the shell is provided with an upper elongated hole extending in the vertical direction, and the middle part of the upper thrust pin is slidably connected in the upper elongated hole.

[0015] As a preferred technical solution of this utility model, the lower part of the housing is provided with a lower elongated hole extending in the vertical direction, and the middle part of the lower thrust pin is slidably connected in the lower elongated hole.

[0016] As a preferred technical solution of this utility model, the shell has an opening on one side, and a shell cover plate is installed on one side of the shell by bolts.

[0017] As a preferred technical solution of this utility model, the driving mechanism includes a gear reduction motor installed at one end of the housing, a gear is installed on the motor shaft of the gear reduction motor, and the sliding block is provided with meshing teeth evenly distributed along its length on the side away from the panel, and the meshing teeth mesh with the gear.

[0018] Beneficial effects: During operation, this utility model controls the sliding block to slide within the housing via a drive mechanism. The sliding of the sliding block drives the upper transmission rack to slide within the housing. Since the upper and lower transmission racks are respectively meshed on both sides of the transmission gear, they maintain a synchronous but opposite sliding relationship within the housing. This sliding of the two racks can drive the upper and lower thrust pins to maintain synchronous but opposite sliding, and then drive the upper and lower latches to move synchronously but oppositely. This enables the synchronous unlocking or locking operation of the upper and lower latches, thereby achieving electric control of door opening and locking. This technology, applied in the field of intelligent door control, solves the problem that traditional mechanical latches cannot automatically lock and unlock. Attached Figure Description

[0019] Figure 1 This is a side view of the present invention in the locked state;

[0020] Figure 2 This is a side view of the present invention when the lever arm is manually operated;

[0021] Figure 3 This is a front view of the housing and housing cover plate in this utility model when they are in contact.

[0022] Figure 4 This is a front view of the panel in this utility model;

[0023] Figure 5 This is a schematic diagram of the cooperation between the drive mechanism and the sliding block inside the housing in Embodiment 2.

[0024] In the diagram: 1-Secondary door; 2-Panel; 3-Housing; 4-Upper thrust pin; 5-Lower thrust pin; 6-Upper latch rod; 7-Upper latch; 8-Fixed door frame; 9-Lower latch rod; 10-Lower latch; 11-Ground plane; 12-Upper transmission rack; 13-Lower transmission rack; 14-Transmission gear; 15-Sliding block; 16-First motor; 17-Transmission screw; 18-Slide base; 19-Stop block; 20-Toggle arm; 21-Torsion spring; 22-Manual control hole; 23-Decorative cover; 24-Housing cover plate; 25-Gear reduction motor; 26-Gear. Detailed Implementation

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is used to help understand this utility model, but does not constitute a limitation on this utility model.

[0026] Example:

[0027] like Figures 1-4 As shown, this embodiment provides a door latch structure, which is installed on the secondary door 1 of a double door. It includes a panel 2, a housing 3, an upper push pin 4 and a lower push pin 5. The panel 2 is installed on the side of the secondary door 1 near the main door, and the housing 3 is installed inside the secondary door 1 on the back of the panel 2. The panel 2 covers most of the components inside the housing 3 and cooperates with the housing 3 to ensure the stability of its internal structure.

[0028] Furthermore, the upper thrust pin 4 is slidably connected to the upper part of the housing 3 in the vertical direction, and one end of the upper thrust pin 4 is connected to the upper pin 7 through the upper pin connecting rod 6. This is used to push the upper pin 7 into the fixed door frame 8 above the secondary door 1 by sliding the upper thrust pin 4 upward. Thus, by controlling the upper thrust pin 4 to slide up and down, the upper pin 7 can be driven to slide up and down by the upper pin connecting rod 6. The upper pin 7 slides upward to lock the door, and slides downward to unlock the door.

[0029] Meanwhile, the lower push pin 5 is slidably connected to the lower part of the housing 3 in the vertical direction, and one end of the lower push pin 5 is connected to the lower pin 10 through the lower pin connecting rod 9. The lower push pin 5 slides downward to push the lower pin 10 into the ground plane 11 below the secondary door 1. Thus, by controlling the lower push pin 5 to slide up and down, the lower pin 10 can be driven to slide up and down by the lower pin connecting rod 9. The lower pin 10 slides down to lock the door, and slides up to unlock the door. The cooperation between the upper push pin 4 and the lower push pin 5 makes the door more stable when locked.

[0030] Based on the above structure, a linkage assembly is installed inside the housing 3. The linkage assembly includes an upper transmission rack 12, a lower transmission rack 13, and a transmission gear 14. The upper transmission rack 12 and the lower transmission rack 13 are slidably connected inside the housing 3, and the transmission gear 14 is rotatably connected inside the housing 3. The two sides of the transmission gear 14 mesh with the lower part of the upper transmission rack 12 and the upper part of the lower transmission rack 13, respectively. The upper end of the upper transmission rack 12 is fixedly connected to the upper thrust pin 4, and the lower end of the lower transmission rack 13 is fixedly connected to the lower thrust pin 5. Thus, as long as the transmission gear 14 rotates, it can drive the upper transmission rack 12 and the lower transmission rack 13 to slide in opposite directions, thereby controlling the upper pin 7 and the lower pin 10 to achieve synchronous unlocking or locking actions.

[0031] To achieve electric control, a vertical sliding cavity is provided inside the housing 3 on the back of the linkage component. A sliding block 15 is slidably connected within this cavity to drive the upper transmission rack 12 to slide within the housing 3. The sliding block 15 can directly drive the upper transmission rack 12 to slide up and down, or indirectly drive it to slide up and down, without specific limitations. As the upper transmission rack 12 slides up and down, the lower transmission rack 13 must slide simultaneously, thus achieving synchronous unlocking or locking control. A drive mechanism is installed at one end of the housing 3 to drive the sliding block 15 to slide within the vertical sliding cavity, thus enabling... To achieve electric control of unlocking or locking the door, the drive mechanism can be an existing first motor or electric cylinder lamp, without specific restrictions. Preferably, the drive mechanism includes a first motor 16 installed at one end of the housing 3. A transmission screw 17 extending in the vertical direction is connected to the motor shaft of the first motor 16. The transmission screw 17 is threadedly connected to the sliding block 15. After the first motor 16 is started, it drives the transmission screw 17 to rotate. The transmission screw 17 drives the sliding block 15 to slide in the housing. The structure is simple and stable. The first motor 16 is preferably a first motor with a large reduction ratio. It can only rotate after the first motor is powered on.

[0032] It should be noted that the electric control can be used with the control panel to realize intelligent control methods such as fingerprint control, card swipe control, face control, voice control and password control. However, how to control the operation of the drive mechanism through fingerprint control, face and password is existing technology and is not protected by this utility model. Therefore, it will not be described in detail here.

[0033] In operation, this utility model controls the sliding block 15 to slide within the housing 3 via a drive mechanism. The sliding of the sliding block 15 drives the upper transmission rack 12 to slide within the housing 3. Since the upper transmission rack 12 and the lower transmission rack 13 are respectively meshed on both sides of the transmission gear 14, they maintain a synchronous but opposite sliding relationship within the housing 3. Their sliding can drive the upper thrust pin 4 and the lower thrust pin 5 to maintain a synchronous but opposite sliding relationship, and then drive the upper latch 7 and the lower latch 10 to maintain a synchronous but opposite movement. This enables the upper latch 7 and the lower latch 10 to perform synchronous unlocking or locking operations, thereby achieving electric control of opening and locking the door and solving the problem of difficulty in operation for the elderly and children, which brings great inconvenience to users.

[0034] As a preferred embodiment of this invention, it should be further explained that the back of the upper transmission rack 12 is connected to a sliding base 18 that is slidably connected in the vertical direction within the housing 3. The sliding base 18 has a transverse sliding cavity, and a stop block 19 is slidably connected within the transverse sliding cavity. A limiting groove is formed on the side of the sliding block 15 facing the sliding base 18. One end of the stop block 19 is inserted into the limiting groove. When one end of the stop block 19 is inserted into the limiting groove, the up-and-down sliding of the sliding block 15 will drive the stop block 19 to slide up and down. The up-and-down sliding of the stop block 19 will drive the sliding base 18 to slide up and down. The up-and-down sliding of the sliding base 18 will drive the upper transmission rack 12 to slide up and down, thereby realizing the electric control of opening and locking the door.

[0035] Example 2:

[0036] This embodiment is a further improvement based on Embodiment 1. The specific differences between this embodiment and Embodiment 1 are as follows:

[0037] As a preferred technical solution of this utility model, a lever arm 20 is installed on the slide base 18. The middle part of the lever arm 20 is rotatably connected to the slide base 18 via a torsion spring 21. One end of the lever arm 20 is provided with a long strip limiting hole. A limiting rod is connected to one side of the stop block 19. The limiting rod is inserted into the long strip limiting hole. In a natural state, the torsion spring 21 will control the upper end of the lever arm 20 to swing towards the sliding block 15, thereby controlling one end of the stop block 19 to be stably inserted into the limiting groove of the sliding block 15, which can ensure the stability during electric control. A manual control hole 22 is provided in the middle of the upper transmission rack 12. The manual control hole 22 is correspondingly provided at the other end of the lever arm 20, which facilitates manual control. The manual control hole 22 pushes the other end of the lever 20; the surface of the panel 2 is provided with a long strip clearance hole extending in the vertical direction, and the manual control hole 22 is set in correspondence with the long strip clearance hole. When manual control is required due to power failure or malfunction, the user can take a small wooden stick or similar actuating element and pass it through the long strip clearance hole and the manual control hole 22, and then push the other end of the lever 20 to slide towards the sliding block 15. In this way, one end of the lever 20 will drive the stop block 19 to slide away from the sliding block 15, so that the stop block 19 disengages from the sliding block 15. Then the actuating element slides up and down in the long strip clearance hole, which can control the upper transmission rack 12 to slide up and down in the housing 3, thereby realizing the manual control of opening and locking the door.

[0038] Meanwhile, in the above structure, when the actuating component is retracted, the torsion spring 21 will drive the stop block 19 to slide towards the sliding block 15 again. In this way, after the drive mechanism is started, one end of the stop block 19 can be automatically inserted into the limiting groove of the sliding block 15, returning to the electric control mode, thereby realizing the free switching between manual control and electric control.

[0039] As a preferred technical solution of this utility model, the elongated clearance hole is a snap-fit ​​hole, and a decorative cover 23 located on the surface of the panel 2 is snapped into the elongated clearance hole to ensure aesthetics and make it difficult for people to notice. When manual unlocking is required, the decorative cover 23 can be removed.

[0040] As a preferred technical solution of this utility model, the upper part of the housing 3 is provided with an upper elongated hole extending in the vertical direction, and the middle part of the upper thrust pin 4 is slidably connected in the upper elongated hole. The upper thrust pin 4 is further limited by the upper elongated hole to ensure the stability of the upper thrust pin 4 when sliding.

[0041] As a preferred technical solution of this utility model, the lower part of the housing 3 is provided with a lower elongated hole extending in the vertical direction, and the middle part of the lower thrust pin 5 is slidably connected in the lower elongated hole. The lower thrust pin 5 is further limited by the upper and lower elongated holes to ensure the stability of the lower thrust pin 5 when sliding.

[0042] As a preferred technical solution of this utility model, the shell 3 has an opening on one side, and a shell cover plate 24 is bolted to one side of the shell 3 to facilitate the loading and unloading of the internal structure.

[0043] Example 2:

[0044] This embodiment is a further improvement based on Embodiment 1. The specific differences between this embodiment and Embodiment 1 are as follows:

[0045] like Figure 4 As shown, in a preferred embodiment of this utility model, the driving mechanism includes a gear reducer motor 25 installed at one end of the housing 3. A gear 26 is installed on the motor shaft of the gear reducer motor 25. The sliding block 15 is provided with meshing teeth evenly distributed along its length on the side away from the panel 2. The meshing teeth mesh with the gear 26. This embodiment provides a new driving mechanism compared to the first embodiment. By driving the gear 26 to rotate through the gear reducer motor 25, the sliding block 15 can also be driven to slide stably within the housing 3.

[0046] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A door latch structure, installed on the secondary door (1) of a double door, characterized in that, Includes panel (2), housing (3), upper thrust pin (4) and lower thrust pin (5). Panel (2) is installed on the side of the secondary door (1) near the main door, and housing (3) is installed inside the secondary door (1) on the back of panel (2). The upper thrust pin (4) is slidably connected to the upper part of the housing (3) in the vertical direction, and one end of the upper thrust pin (4) is connected to the upper pin (7) through the upper pin connecting rod (6) to push the upper pin (7) into the fixed door frame (8) above the secondary door (1) by the upward sliding of the upper thrust pin (4); The lower thrust pin (5) is slidably connected to the lower part of the housing (3) in the vertical direction, and one end of the lower thrust pin (5) is connected to the lower pin (10) through the lower pin connecting rod (9) to push the lower pin (10) into the ground plane (11) below the sub-door (1) by sliding the lower thrust pin (5) downward. The housing (3) is equipped with a linkage assembly, which includes an upper transmission rack (12), a lower transmission rack (13) and a transmission gear (14). The upper transmission rack (12) and the lower transmission rack (13) are slidably connected in the housing (3), and the transmission gear (14) is rotatably connected in the housing (3). The two sides of the transmission gear (14) are respectively engaged with the lower part of the upper transmission rack (12) and the upper part of the lower transmission rack (13). The upper end of the upper transmission rack (12) is fixedly connected to the upper thrust pin (4), and the lower end of the lower transmission rack (13) is fixedly connected to the lower thrust pin (5). A vertical sliding cavity is provided in the housing (3) on the back of the linkage component. A sliding block (15) is slidably connected in the vertical sliding cavity to drive the upper transmission rack (12) to slide in the housing (3). A driving mechanism for driving the sliding block (15) to slide in the vertical sliding cavity is installed at one end of the housing (3).

2. The door latch structure according to claim 1, characterized in that, The drive mechanism includes a first motor (16) installed at one end of the housing (3), and a transmission screw (17) extending in the vertical direction is connected to the motor shaft of the first motor (16). The transmission screw (17) is threadedly connected to the sliding block (15).

3. A door latch structure according to claim 1 or 2, characterized in that, The back of the upper transmission rack (12) is connected to a sliding base (18) that is slidably connected in the vertical direction within the housing (3). A transverse sliding cavity is provided on the sliding base (18), and a stop block (19) is slidably connected in the transverse sliding cavity. A limit groove is provided on the side of the sliding block (15) facing the sliding base (18), and one end of the stop block (19) is inserted into the limit groove.

4. A door latch structure according to claim 3, characterized in that, A lever arm (20) is installed on the slide base (18). The middle part of the lever arm (20) is rotatably connected to the slide base (18) by a torsion spring (21). One end of the lever arm (20) is provided with a long strip limiting hole. One side of the stop block (19) is connected to a limiting rod, which is inserted into the long strip limiting hole. The middle part of the upper transmission rack (12) is provided with a manual control hole (22), which is correspondingly provided with the other end of the lever arm (20). The surface of the panel (2) is provided with a long strip clearance hole extending in the vertical direction, which is correspondingly provided with the manual control hole (22).

5. A door latch structure according to claim 4, characterized in that, The elongated clearance hole is a snap-fit ​​hole, and a decorative cover (23) located on the surface of the panel (2) is snapped into the elongated clearance hole.

6. A door latch structure according to claim 1, characterized in that, The upper part of the housing (3) is provided with an upper elongated hole extending in the vertical direction, and the middle part of the upper thrust pin (4) is slidably connected in the upper elongated hole.

7. A door latch structure according to claim 1, characterized in that, The lower part of the housing (3) is provided with a lower elongated hole extending in the vertical direction, and the middle part of the lower thrust pin (5) is slidably connected in the lower elongated hole.

8. A door latch structure according to claim 1, characterized in that, The housing (3) has an opening on one side, and a housing cover plate (24) is bolted to one side of the housing (3).

9. A door latch structure according to claim 1, characterized in that, The drive mechanism includes a gear reducer motor (25) installed at one end of the housing (3). A gear (26) is installed on the motor shaft of the gear reducer motor (25). The sliding block (15) away from the panel (2) is provided with meshing teeth evenly distributed along its length direction. The meshing teeth mesh with the gear (26).

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