Automatic bolt device for a parent-child door

Abstract

The application discloses an automatic bolt device for a primary and secondary door, which comprises a shell, a first bolt and a second bolt which are respectively slidably connected to the shell, a driving device arranged in the shell, an output shaft of the driving device, a first pull rod and a second pull rod connected to the output shaft through connecting rods, and the first bolt and the second bolt connected to the first pull rod and the second pull rod respectively. The automatic bolt device for the primary and secondary door has simple structure, the driving device synchronously drives the first bolt and the second bolt through the connecting rods, and the internal structure of the shell is simplified.

Description

Technical Field

[0001] This application relates to the field of door lock technology, and in particular to an automatic latch device for double doors. Background Technology

[0002] Many residential buildings currently use a double-door system for their entrance doors. Generally, only the main door is opened when entering or leaving, while the secondary door remains fixed. If large items need to be moved in, the secondary door is then opened. However, the secondary door in existing double-door systems requires a latch to control its opening and closing. This latch requires operating both the upper and lower latches separately, which is inconvenient and inefficient. A central locking latch, which replaces the main latch, uses a central lever to control the extension and retraction of the upper and lower latches. However, closing the door requires locking the secondary door and then manually releasing the latch, which is still not convenient. Therefore, improvements are needed. Utility Model Content

[0003] The purpose of this invention is to provide an automatic latching device for double doors, so as to overcome the shortcomings of the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: This utility model discloses an automatic latch device for a double door, including a housing and a first latch and a second latch slidably connected to the housing. A driving device is provided inside the housing, and the output shaft of the driving device is connected to a first pull rod and a second pull rod via a connecting rod. The first latch and the second latch are respectively connected to the first pull rod and the second pull rod.

[0005] Furthermore, in the aforementioned automatic latch device for double doors, the housing includes a housing with openings at the top and sides, a top plate disposed at the top of the housing, and a panel disposed at the side openings.

[0006] Furthermore, in the aforementioned automatic latch device for double doors, a toggle groove is provided in the panel.

[0007] Furthermore, in the aforementioned automatic latch device for double doors, a positioning ring is provided at one end of the connecting rod near the top plate, and the positioning ring is rotatably embedded in the top plate.

[0008] Furthermore, in the aforementioned automatic latch device for double doors, the two ends of the connecting rod are respectively connected to the corresponding first pull rod and second pull rod via a first connecting pin and a second connecting pin.

[0009] Furthermore, in the above-mentioned automatic latch device for double doors, the two ends of the first connecting pin protrude from the corresponding sides of the first pull rod, the two ends of the second connecting pin protrude from the corresponding sides of the second pull rod, and the housing is provided with a first groove and a second groove corresponding to the first connecting pin and the second connecting pin, respectively.

[0010] Furthermore, in the aforementioned automatic latch device for double doors, the drive unit includes a motor and a gearbox, and the connecting rod is connected to the output shaft of the gearbox.

[0011] Furthermore, in the above-mentioned automatic latch device for double doors, the first latch and the second latch are coaxially arranged, and an adapter rod is provided at the end of the second pull rod near the second latch.

[0012] Furthermore, in the above-mentioned automatic latch device for double doors, the first latch and the second latch are respectively connected to the first pull rod and the adapter rod via a third connecting pin and a fourth connecting pin, and the housing is provided with a third sliding groove and a fourth sliding groove respectively corresponding to the third connecting pin and the fourth connecting pin.

[0013] Furthermore, in the aforementioned automatic latch device for double doors, a fifth connecting pin is provided inside the first pull rod, a sixth connecting pin is provided inside the second pull rod, and the outer casing is provided with a fifth sliding groove and a sixth sliding groove corresponding to the fifth connecting pin and the sixth connecting pin, respectively.

[0014] Compared with the prior art, the automatic latch device for mother and daughter doors of this utility model has a simple structure. The drive device drives the first and second latches synchronously through the linkage, which simplifies the internal structure of the housing. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 The diagram shown is a structural schematic of an automatic latch device for a mother-daughter door in a specific embodiment of this utility model.

[0016] Figure 2 The diagram shown is an exploded view of an automatic latch device for a mother-daughter door in a specific embodiment of this utility model.

[0017] Figure 3 The diagram shown is an internal schematic of the shell in a specific embodiment of this utility model.

[0018] Figure 4 The diagram shown is a schematic representation of the connection between the connecting rod, the first tie rod, and the second tie rod in a specific embodiment of this utility model.

[0019] Figure 5 The diagram shown is a transmission schematic of the gearbox in a specific embodiment of this utility model. Detailed Implementation

[0020] The technical solutions of the present utility model will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] Combination Figures 1 to 5 As shown, an automatic latch device for a double door includes a housing 1 and a first latch 2 and a second latch 3 that are slidably connected to the housing 1. A drive device is provided inside the housing 1. The output shaft of the drive device is connected to a first pull rod 5 and a second pull rod 6 via a connecting rod 4. The first latch 2 and the second latch 3 are respectively connected to the first pull rod 5 and the second pull rod 6.

[0022] In this technical solution, the first and second pins are respectively connected to a locking tongue device through conventional structures such as double-headed screws. The locking tongue device directly uses an existing elastically retractable locking tongue. It is synchronously driven by a drive device to realize the automatic locking / unlocking of the sub-door, saving time and effort. The first and second pull rods are synchronously driven by a connecting rod, simplifying the structure. Both the first and second pull rods are groove-shaped structures processed by bending and other processes, which slide against the inner wall of the outer shell. The first upright and the second pull rod are also provided with clearance grooves corresponding to the connecting rod to avoid interference with the swing of the connecting rod.

[0023] For example, see Figure 1 and Figure 2 As shown, the outer casing 1 includes a housing 11 with openings at the top and sides, a top plate 12 disposed at the top of the housing 11, and a panel 13 disposed at the side openings.

[0024] In this technical solution, the shell is processed by bending and other processes, and mounting columns and mounting blocks are set by welding and other processes. The top plate and the panel are processed by stamping and other processes, and are fixed to the corresponding mounting columns and mounting blocks by conventional bolts. The drive device and connecting rod are encapsulated in the shell. The two ends of the shell are respectively provided with U-shaped grooves corresponding to the first pin and the second pin. The first pin and the second pin pass through the corresponding U-shaped grooves and extend to the outside of the shell. The panel is fixed to the door leaf of the sub-door by conventional bolts.

[0025] For example, see Figure 1 and Figure 2 As shown, a toggle groove 131 is provided inside the panel 13.

[0026] In this technical solution, the side of the second pull rod is provided with a toggle hole corresponding to the toggle slot. In case of emergencies such as power outages, the second pull rod can be toggled with a screwdriver or other tools to slide the first and second pins, thereby achieving automatic locking / unlocking of the sub-door.

[0027] For example, see Figures 1 to 5 As shown, a positioning ring 41 is provided at one end of the connecting rod 4 near the top plate 12, and the positioning ring 41 is rotatably embedded in the top plate 12.

[0028] In this technical solution, the connecting rod is a plate-like structure and is sleeved on the output shaft of the drive device. The positioning ring is connected to the output shaft of the drive device through conventional methods such as interference fit or threaded connection, and is pressed on the corresponding surface of the connecting rod. The top plate has a through hole corresponding to the positioning ring and is sleeved on the positioning ring to improve installation accuracy. The end of the output shaft of the drive device near the connecting rod can also be set as a conventional structure such as a square shaft. The center of the connecting rod is machined with a square hole and is sleeved on the square shaft part of the output shaft, and then fixed by countersunk screws, etc. The positioning ring is sleeved on the end of the output shaft. That is, the connection structure between the output shaft and the connecting rod can realize the function of the output shaft driving the connecting rod to rotate.

[0029] For example, see Figures 1 to 4 As shown, the two ends of the connecting rod 4 are respectively connected to the corresponding first pull rod 5 and second pull rod 6 via the first connecting pin 51 and the second connecting pin 61.

[0030] In this technical solution, the connecting rod has waist-shaped holes machined at both ends, and is slidably sleeved on the first and second pull rods respectively. The swing of the connecting rod drives the extension and retraction of the first and second pull rods, that is, drives the extension and retraction of the first and second pins. A conventional bushing is provided between the inner wall of the first and second pull rods and the top of the connecting rod (the side near the top plate) to ensure that the connecting rod is always perpendicular to the output shaft of the drive device and to ensure the synchronization of the first and second pull rods.

[0031] For example, see Figures 1 to 4 As shown, the two ends of the first connecting pin 51 protrude from the corresponding sides of the first pull rod 5, and the two ends of the second connecting pin 61 protrude from the corresponding sides of the second pull rod 6. The outer casing 1 is provided with a first groove and a second groove corresponding to the first connecting pin 51 and the second connecting pin 61, respectively.

[0032] In this technical solution, the first slide groove and the second slide groove are arranged along the axial direction parallel to the first pin or the second pin, and are respectively arranged on the bottom wall of the top plate and the housing (relative to the side wall of the top plate). The first connecting pin and the second connecting pin slide in the first slide groove and the second slide groove respectively, thereby restricting the movement direction of the first pull rod and the second pull rod, and ensuring that the first pin and the second pin always move along their axial direction.

[0033] For example, see Figure 2 , Figure 3 and Figure 5 As shown, the drive unit includes a motor 7 and a gearbox 8, with a connecting rod 4 connected to the output shaft 81 of the gearbox 8.

[0034] In this technical solution, both the motor and the gearbox can utilize existing structures. The gearbox is installed in the housing using conventional bolts, and the motor drives the gears in the gearbox through conventional worm gears and other structures, thereby driving the output shaft of the gearbox to rotate, which in turn drives the connecting rod to swing. The output shaft can also mesh with the corresponding gear through a conventional intermittent gear mechanism, thereby limiting the swing angle of the connecting rod, which in turn limits the extension and retraction stroke of the first and second pins, avoiding adverse situations such as motor overload or damage to the housing.

[0035] For example, see Figure 1 As shown, the first pin 2 and the second pin 3 are coaxially arranged, and the second pull rod 6 is provided with an adapter rod at one end near the second pin 3.

[0036] In this technical solution, to ensure the uniformity of force on the upper and lower ends of the sub-door leaf, the latches at the upper and lower ends are set coaxially, so the first and second pins are set coaxially. The adapter rod and the second pull rod are integrally formed. Depending on the connection position of the second pin, if the sub-door latches cannot be set coaxially due to actual working conditions, the first and second pins can be set coaxially with the corresponding latches respectively.

[0037] For example, see Figure 1 As shown, the first pin 2 and the second pin 3 are respectively connected to the first pull rod 5 and the adapter rod through the third connecting pin 52 and the fourth connecting pin 62. The outer casing 1 is provided with a third slide groove and a fourth slide groove corresponding to the third connecting pin 52 and the fourth connecting pin 62, respectively.

[0038] In this technical solution, the third and fourth slide grooves are arranged along an axial direction parallel to the first or second pin, and are respectively located on the bottom wall of the top plate and the housing (relative to the side wall of the top plate). The third and fourth connecting pins slide in the third and fourth slide grooves respectively, thereby restricting the movement direction of the first and second pull rods.

[0039] For example, see Figure 1As shown, the first pull rod 5 is provided with a fifth connecting pin 53, the second pull rod 6 is provided with a sixth connecting pin 63, and the outer casing 1 is provided with a fifth sliding groove and a sixth sliding groove corresponding to the fifth connecting pin 53 and the sixth connecting pin 63, respectively.

[0040] In this technical solution, the fifth and sixth slide grooves are arranged along the axial direction parallel to the first or second pin, and are respectively located on the bottom wall of the top plate and the housing (relative to the side wall of the top plate). The fifth and sixth connecting pins slide in the fifth and sixth slide grooves respectively, thereby restricting the movement direction of the first and second pull rods and ensuring that the first and second pins always move along their axial direction.

[0041] In summary, the automatic latch device for double doors of this invention has a simple structure.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0043] The above description is only a specific embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. An automatic latch device for a double door, characterized in that, The device includes a housing and a first pin and a second pin that are slidably connected to the housing. A drive device is provided inside the housing. The output shaft of the drive device is connected to a first pull rod and a second pull rod via a connecting rod. The first pin and the second pin are respectively connected to the first pull rod and the second pull rod.

2. The automatic latch device for a double door according to claim 1, characterized in that: The housing includes a shell with openings at the top and sides, a top plate disposed at the top of the shell, and a panel disposed at the side openings.

3. The automatic latch device for a double door according to claim 2, characterized in that: The panel is provided with a toggle groove.

4. The automatic latch device for a double door according to claim 2, characterized in that: A positioning ring is provided at one end of the connecting rod near the top plate, and the positioning ring is rotatably embedded in the top plate.

5. The automatic latch device for a double door according to claim 1, characterized in that: The two ends of the connecting rod are respectively connected to the corresponding first pull rod and second pull rod via a first connecting pin and a second connecting pin.

6. The automatic latch device for a double door according to claim 5, characterized in that: The two ends of the first connecting pin protrude from the corresponding sides of the first pull rod, and the two ends of the second connecting pin protrude from the corresponding sides of the second pull rod. The outer casing is provided with a first groove and a second groove corresponding to the first connecting pin and the second connecting pin, respectively.

7. The automatic latch device for a double door according to claim 1, characterized in that: The drive unit includes a motor and a gearbox, and the connecting rod is connected to the output shaft of the gearbox.

8. The automatic latch device for a double door according to claim 1, characterized in that: The first pin and the second pin are coaxially arranged, and an adapter rod is provided at the end of the second pull rod near the second pin.

9. The automatic latch device for a double door according to claim 8, characterized in that: The first pin and the second pin are respectively connected to the first pull rod and the adapter rod via the third connecting pin and the fourth connecting pin. The housing is provided with a third sliding groove and a fourth sliding groove that correspond to the third connecting pin and the fourth connecting pin, respectively.

10. The automatic latch device for a double door according to claim 1, characterized in that: The first pull rod is provided with a fifth connecting pin, the second pull rod is provided with a sixth connecting pin, and the outer shell is provided with a fifth sliding groove and a sixth sliding groove corresponding to the fifth connecting pin and the sixth connecting pin, respectively.

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