Bolt mechanism capable of automatically opening auxiliary door and double-leaf door

Abstract

The utility model discloses a bolt mechanism capable of automatically opening an auxiliary door and a double-leaf door. The bolt mechanism comprises a shell assembly and a connecting rod assembly movably arranged on the side edge of the shell assembly in a penetrating mode. The transmission assembly is arranged in the shell assembly in a penetrating mode, the connecting rod assembly can drive the transmission assembly to move, and the manual locking function of the auxiliary door leaf is achieved; and the unlocking assembly is movably arranged in the shell assembly in a penetrating mode and can be detachably connected with the transmission assembly in a clamped mode, and the unlocking assembly is matched with the transmission assembly to achieve the automatic unlocking function of the auxiliary door leaf. Through mutual cooperation of the connecting rod assembly, the transmission assembly and the unlocking assembly, the functions of manual locking and automatic opening of the auxiliary door can be achieved respectively, and the problem that an existing auxiliary door leaf cannot be automatically opened along with opening of a main door leaf is effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to hardware fitting technical field, especially a kind of bolt mechanism and double-leaf door that can automatically open side door. BACKGROUND

[0002] With the development of society and the continuous improvement of living standards, people's fire safety requirements for entry door are higher and higher, GB12955-2024 "fire door" new standard is issued, and formally implemented from May 1, 2026. In the new standard of fire door, it is clearly required that "the bolt of evacuation passage fire door should be automatically opened when the door leaf is opened", there are many types of bolts in the market, but there are few automatic bolts, the existing automatic bolt is generally split bolt, one door needs to install one on the upper head and the lower head, which can only be used for indoor wooden door and cannot be applied to entry door, and this type of automatic bolt cannot meet the requirement of users to close the side door leaf alone, and the bolt can only be passively locked when the two door leaves of double-leaf door are closed. Therefore, there is an urgent need to develop a new type of automatic bolt to meet the potential demand of the market. In order to meet the requirements of the new standard of fire door and the practical needs of users using double-leaf security door and fire door, a bolt mechanism and double-leaf door that can automatically open side door are provided to solve the above problems. CONTENT OF UTILITY MODEL

[0003] One of the purposes of the utility model is to provide a bolt mechanism and double-leaf door that can automatically open side door, in order to solve the problem that the existing side door leaf cannot be automatically opened when the main door leaf is opened.

[0004] The bolt mechanism and double-leaf door that can automatically open side door can be realized by the following technical solutions:

[0005] The bolt mechanism that can automatically open side door comprises a housing assembly, a connecting rod assembly movably penetrating the side of the housing assembly, and a transmission assembly penetrating the housing assembly, wherein the connecting rod assembly can drive the transmission assembly to move, realizing the manual locking function of side door leaf, and an unlocking assembly movably penetrating the housing assembly and being detachably connected with the transmission assembly, wherein the unlocking assembly and the transmission assembly cooperate to realize the automatic unlocking function of side door leaf.

[0006] In one embodiment, the transmission assembly comprises a lever gear rotatably arranged in the housing assembly and capable of being in contact with the connecting rod assembly; a first transmission gear rotatably arranged in the housing assembly and in meshing transmission connection with the lever gear; a first telescopic arm movably penetrating a side of the housing assembly and in transmission connection with the first transmission gear; a second transmission gear rotatably arranged in the housing assembly and in transmission connection with the first telescopic arm; a second telescopic arm movably penetrating a side of the housing assembly and in transmission connection with the second transmission gear, the unlocking assembly being capable of being in detachable engagement with the second telescopic arm; a first elastic member having two ends respectively connected to the housing assembly and the first telescopic arm; and a second elastic member having two ends respectively connected to the housing assembly and the second telescopic arm.

[0007] In one embodiment, the first telescopic arm is provided with a first rack and a second rack on opposite sides thereof, the first rack being in meshing transmission connection with the first transmission gear, and the second rack being in meshing transmission connection with the second transmission gear.

[0008] In one embodiment, the second telescopic arm is provided with a clamping block fixedly arranged thereon, the clamping block being capable of being in detachable engagement with the unlocking assembly, and a slope being arranged at a contact position of the clamping block and the unlocking assembly.

[0009] In one embodiment, the unlocking assembly comprises a pressing member movably penetrating the housing assembly and movably penetrating a guide piece arranged in the housing assembly; a fixed piece fixedly arranged on the pressing member; a locking member movably penetrating the pressing member and capable of being in detachable engagement with the clamping block; a movable connecting rod having one end fixedly connected to the fixed piece and the other end slidingly arranged on the locking member; a third elastic member penetrating the pressing member and arranged between the pressing member and the guide piece; and a fourth elastic member penetrating the pressing member and arranged between the fixed piece and the locking member.

[0010] In one embodiment, the locking member is provided with a guide sliding groove, and one end of the movable connecting rod is slidingly arranged in the guide sliding groove.

[0011] In one embodiment, the two sides of the locking member in contact with the clamping block are respectively provided with sliding arc surfaces, and the sliding arc surfaces are in cooperation with the slope of the clamping block.

[0012] In one embodiment, the second telescopic arm is provided with a third rack on the same side as the clamping block, and the third rack is in meshing transmission connection with the second transmission gear.

[0013] In one of the embodiments, the linkage assembly comprises a transmission-connected linkage body and a torsion spring, which are sequentially arranged on a positioning column in the housing assembly; the linkage body comprises an integrally-formed connecting head, a linkage short end and a linkage long end, and the linkage short end and the linkage long end are arranged on the same line and at two ends of the connecting head respectively.

[0014] The double-leaf door capable of automatically opening the secondary door comprises the bolt mechanism of any one of the above;

[0015] The double-leaf door further comprises a door frame, a secondary door leaf, a primary door leaf and two bolt rods.

[0016] The door frame is a support body; the secondary door leaf and the primary door leaf are rotationally connected to the door frame and can be relatively opened or closed; the bolt mechanism is fixedly arranged on the secondary door leaf and the pressing piece thereof can be elastically connected to the primary door leaf; the two bolt rods are movably and respectively arranged in the secondary door leaf and are respectively in transmission connection with the first telescopic arm and the second telescopic arm in the bolt mechanism.

[0017] Compared with the prior art, the bolt mechanism and the double-leaf door capable of automatically opening the secondary door have the following beneficial effects:

[0018] When the primary door leaf is opened, the compression force acting on the pressing piece disappears, and the fixed plate, the movable linkage and the locking piece are sequentially driven to move under the restoring force of the elastic piece, so that the locking piece releases the clamping connection of the clamping block, and the two telescopic arms move under the restoring force of the elastic piece, thereby realizing the automatic opening operation of the secondary door leaf, effectively solving the problem that the existing secondary door leaf cannot be automatically opened following the opening of the primary door leaf; at the same time, the clamping block moves and is clamped with the locking piece, thereby completing the manual locking operation of the secondary door leaf. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be briefly introduced the drawings needed to be used in the embodiments, it should be understood, the following drawings only shows some embodiments of the utility model, therefore should not be regarded as the limitation to the range, for the ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other related drawings according to these drawings.

[0020] Figure 1 is the structure schematic diagram of the bolt mechanism of the utility model capable of automatically opening the secondary door in the first use state.

[0021] Figure 2 is a structure schematic view of the second use state of the bolt mechanism capable of automatically opening the side door of the utility model;

[0022] Figure 3 is a structure schematic view of the third use state of the bolt mechanism capable of automatically opening the side door of the utility model;

[0023] Figure 4 is an explosion structure schematic view of the bolt mechanism capable of automatically opening the side door of the utility model, comprising a main shell, a connecting rod main body, a second telescopic arm, a pressing piece and a locking piece;

[0024] Figure 5 is Figure 4 a structure schematic view of the main shell;

[0025] Figure 6 is Figure 4 a structure schematic view of the connecting rod main body;

[0026] Figure 7 is Figure 4 a structure schematic view of the second telescopic arm;

[0027] Figure 8 is Figure 4 a structure schematic view of the pressing piece;

[0028] Figure 9 is Figure 4 a structure schematic view of the locking piece;

[0029] Figure 10 is a structure schematic view of the double-leaf door capable of automatically opening the side door of the utility model.

[0030] Indicated in the figure: 100, bolt mechanism; 10, shell assembly; 11, fixed panel; 111, connecting rod groove; 112, positioning hole; 113, mounting hole; 114, first fixing hole; 12, main shell; 121, second fixing hole; 122, positioning column; 123, through hole; 124, guide block; 125, connecting buckle; 126, guide piece; 13, cover plate; 20, connecting rod assembly; 21, connecting rod main body; 211, connecting head; 2111, connecting hole; 212, connecting rod short end; 213, connecting rod long end; 22, torsional spring; 30, transmission assembly; 31, lever gear; 311, lever main body; 32, first transmission gear; 33, first telescopic arm; 331, first rack; 332, second rack; 333, first hook; 34, second transmission gear; 35, second telescopic arm; 351, clamping block; 352, third rack; 353, second hook; 354, guide groove; 36, first elastic member; 37, second elastic member; 40, unlocking assembly; 41, pressing piece; 411, connecting shaft; 4111, clamping groove; 412, pressing head; 42, fixed sheet; 43, locking piece; 431, connecting shaft hole; 432, guide sliding groove; 433, sliding arc surface; 44, movable connecting rod; 45, third elastic member; 46, fourth elastic member; 200, door frame; 201, bolt hole; 300, secondary door leaf; 400, primary door leaf; 500, bolt rod. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0033] Please refer to Figures 1-10As shown, the pin mechanism 100 capable of automatically opening the sub-door mainly comprises a shell assembly 10, a connecting rod assembly 20, a transmission assembly 30 and an unlocking assembly 40; the shell assembly 10 is a hollow cavity, which is fixedly arranged on the sub-door leaf 200; the connecting rod assembly 20 is movably arranged through the side of the shell assembly 10; the transmission assembly 30 is arranged through the shell assembly 10, and the connecting rod assembly 20 can be in contact with the transmission assembly 30 to drive the transmission assembly 30 to drive the two pin rods 500 to extend into the corresponding pin holes 201 on the door frame 200, thereby realizing the manual locking function of the sub-door leaf 300; the unlocking assembly 40 is movably arranged through the shell assembly 10 and can be in contact with the transmission assembly 30, thereby driving the transmission assembly 30 to drive the two pin rods 500 to retract from the corresponding pin holes 201, thereby realizing the automatic unlocking function of the sub-door leaf 300.

[0034] As shown in the drawings, Figures 1-4 As shown in the drawings, in the embodiment, the shell assembly 10 comprises a fixed panel 11, a main shell 12 and a cover plate 13; the fixed panel 11 is fixedly arranged on the side of the sub-door leaf 300, the connecting rod assembly 20 is movably arranged through the fixed panel 11, and the unlocking assembly 40 is movably arranged through the fixed panel 11; the main shell 12 is a hollow cavity, which is fixedly arranged on the side of the fixed panel 11, and the transmission assembly 30 and the unlocking assembly 40 are movably arranged in the main shell 12; the cover plate 13 is fixedly arranged on the main shell 12. Specifically, the fixed panel 11 is provided with a connecting rod groove 111, a positioning hole 112, a plurality of mounting holes 113 and a plurality of first fixing holes 114, the connecting rod assembly 20 is movably arranged through the fixed panel 11 through the connecting rod groove 111, the unlocking assembly 40 is movably arranged through the fixed panel 11 through the positioning hole 112, the fixed panel 11 is fixedly arranged on the side of the sub-door leaf 300 through the plurality of mounting holes 113, and the main shell 12 is fixedly arranged on the fixed panel 11 through the plurality of first fixing holes 114.

[0035] As shown in the drawings, Figure 4 and Figure 5As shown, specifically, the side of the main shell 12 is provided with a plurality of second fixing holes 121, the positions of the plurality of second fixing holes 121 correspond to the positions of the corresponding first fixing holes 114, the fastening screws pass through the first fixing holes 114 and the second fixing holes 121 in turn to fix and install the main shell 12 on the fixed panel 11; a plurality of positioning columns 122 and guide pieces 126 are fixedly arranged on the main inner wall of the main shell 12, the connecting rod assembly 20 is arranged through the corresponding positioning columns 122, some of the positioning columns 122 are provided with internal threads, the fastening screws are threadedly connected in the positioning columns 122 provided with the internal threads and pass through the cover plate 13, so as to fix and install the cover plate 13 on the main shell 12, the positions of the guide pieces 126 correspond to the positions of the positioning holes 112; the opposite sides of the main shell 12 are respectively provided with through holes 123, the transmission assembly 30 passes through the opposite sides of the main shell 12 through the two through holes 123; the side inner wall of the main shell 12 is fixedly provided with a guide block 124, the guide block 124 is slidably connected with the transmission assembly 30, so as to guide the transmission assembly 30; the opposite sides of the main shell 12 are respectively provided with connecting buckles 125, the two connecting buckles 125 are respectively connected with the transmission assembly 30.

[0036] Please refer to Figure 4 and Figure 6 As shown, in the embodiment, the connecting rod assembly 20 includes a connecting rod body 21 and a torsion spring 22, the connecting rod body 21 and the torsion spring 22 are drivingly connected and arranged on the corresponding positioning columns 122 in turn, the torsion spring 22 provides a restoring force for the connecting rod body 21, so that the connecting rod body 21 returns to an initial position, the initial position is that the connecting rod body 21 is horizontally arranged in the connecting rod groove 111, and the connecting rod body 21 is movably arranged through the fixed panel 11 through the connecting rod groove 111. Specifically, the connecting rod body 21 includes an integrally formed connecting head 211, a connecting rod short end 212 and a connecting rod long end 213, the connecting head 211 is rotatably connected on the corresponding positioning column 122 through a connecting hole 2111, the connecting rod short end 212 and the connecting rod long end 213 are arranged on the same straight line and are respectively arranged at the two ends of the connecting head 211, and the connecting rod long end 213 is driven to rotate out of the connecting rod groove 111 by pressing the connecting rod short end 212.

[0037] Please refer to Figures 1-4As shown, in the embodiment, the transmission assembly 30 comprises a lever gear 31, a first transmission gear 32, a first telescopic arm 33, a second transmission gear 34, a second telescopic arm 35, a first elastic member 36 and a second elastic member 37; the lever gear 31 and the connecting rod body 21 are sequentially arranged on the corresponding positioning column 122, the connecting rod body 21 can be in contact with the lever gear 31 to drive the lever gear 31 to rotate; the first transmission gear 32 is rotatably arranged on the corresponding positioning column 122 and is in meshing transmission connection with the lever gear 31, the lever gear 31 drives the first transmission gear 32 to rotate on the corresponding positioning column 122; the first telescopic arm 33 is movably penetrated through the side edge of the main shell 12 through the corresponding through hole 123 and is in transmission connection with the first transmission gear 32, the first transmission gear 32 can drive the first telescopic arm 33 to move relative to the main shell 12, so as to drive the corresponding bolt rod 500 to extend into the bolt hole 201 or retract from the bolt hole 201; the second transmission gear 34 is rotatably arranged on the corresponding positioning column 122 and is in transmission connection with the first telescopic arm 33, the first telescopic arm 33 drives the second transmission gear 34 to rotate on the corresponding positioning column 122; the second telescopic arm 35 is movably penetrated through the side edge of the main shell 12 through the corresponding through hole 123 and is in transmission connection with the second transmission gear 34, the second transmission gear 34 can drive the second telescopic arm 35 to move relative to the main shell 12, so as to drive the corresponding bolt rod 500 to extend into the bolt hole 201 or retract from the bolt hole 201, the unlocking assembly 40 can detachably clasp connect the second telescopic arm 35, so as to simultaneously lock the first telescopic arm 33 and the second telescopic arm 35; one end of the first elastic member 36 is connected to the corresponding connecting buckle 125, and the other end thereof is connected to the first telescopic arm 33, the first elastic member 36 provides a restoring force to the first telescopic arm 33; one end of the second elastic member 37 is connected to the corresponding connecting buckle 125, and the other end thereof is connected to the second telescopic arm 37, the second elastic member 37 provides a restoring force to the second telescopic arm 35. Specifically, the lever gear 31 is fixedly provided with a lever body 311, the connecting rod body 21 can be in contact with the lever body 311 to drive the lever gear 31 to rotate; the first elastic member 36 and the second elastic member 37 are springs.

[0038] Please refer to Figure 4 As shown, specifically, the first telescopic arm 33 is respectively provided with a first rack 331 and a second rack 332 on the opposite sides thereof, the first rack 331 is in meshing transmission connection with the first transmission gear 32, and the second rack 332 is in meshing transmission connection with the second transmission gear 34; the first telescopic arm 33 is further fixedly provided with a first clasp 333, and one end of the first elastic member 36 is connected to the first clasp 333.

[0039] Please refer to Figure 4 and Figure 7As shown, specifically, the second telescopic arm 35 is fixedly provided with a clamping block 351, which can be detachably clamped and connected with the unlocking assembly 40, and a slope is arranged at the contact position of the clamping block 351 and the unlocking assembly 40; a third gear rack 352 is arranged on the same side of the second telescopic arm 35 as the clamping block 351, and the third gear rack 352 is in meshing transmission connection with the second transmission gear 34; a second clamping hook 353 is further arranged on the second telescopic arm 35, and one end of the second elastic member 37 is connected to the second clamping hook 353; a guide groove 354 is arranged on the side of the second telescopic arm 35 opposite to the third gear rack 352, and the guide block 124 is arranged in the guide groove 354, and the guide groove 354 can slide relative to the guide block 124, thereby guiding the movement of the second telescopic arm 35.

[0040] As shown in Figures 1-4 As shown in the embodiment, the unlocking assembly 40 includes a pressing member 41, a fixed sheet 42, a locking member 43, a movable connecting rod 44, a third elastic member 45 and a fourth elastic member 46; the pressing member 41 is movably penetrated through the fixed panel 11 into the main shell 12 through the positioning hole 112 and movably penetrates through the guide sheet 126; the fixed sheet 42 is fixedly arranged on the pressing member 41 and moves with the movement of the pressing member 41; the locking member 43 is movably arranged on the pressing member 41 and can be detachably clamped and connected with the clamping block 351; one end of the movable connecting rod 44 is fixedly connected to the fixed sheet 42, and the other end is slidably arranged on the locking member 43; the third elastic member 45 is arranged on the pressing member 41 and between the pressing member 41 and the guide sheet 126, and provides a restoring force to the pressing member 41; the fourth elastic member 46 is arranged on the pressing member 41 and between the fixed sheet 42 and the locking member 43, and provides a restoring force to the locking member 43. Specifically, the third elastic member 45 and the fourth elastic member 46 are springs.

[0041] As shown in Figure 4 and Figure 8 As shown, specifically, the pressing member 41 includes a connecting shaft 411 and a pressing head 412; the connecting shaft 411 penetrates through the third elastic member 45, the guide sheet 126, the fixed sheet 42, the fourth elastic member 46 in sequence and extends into the locking member 43; the pressing head 412 is fixedly arranged on one side of the connecting shaft 411 and movably penetrates through the fixed panel 11 through the positioning hole 112.

[0042] As shown in Figure 4 and Figure 9As shown, specifically, the locking piece 43 is provided with a connecting shaft hole 431 penetratingly arranged thereon, and the connecting shaft 411 is movably arranged in the connecting shaft hole 431; the locking piece 43 is provided with a guide sliding groove 432, one end of the movable connecting rod 44 is slidingly arranged in the guide sliding groove 432, and the guide sliding groove 432 guides and limits the movement of the movable connecting rod 44; the two sides of the locking piece 43 in contact with the clamping block 351 are respectively provided with sliding arc surfaces 433, so as to facilitate the cooperation with the inclined surface of the clamping block 351.

[0043] As shown in the drawings, Figure 10 As shown, the utility model discloses a double-leaf door capable of automatically opening a secondary door which comprises the above-mentioned any one of the latch mechanism 100, a door frame 200, a secondary door leaf 300, a primary door leaf 400 and two latch rods 500; the door frame 200 is a supporting body; the secondary door leaf 300 and the primary door leaf 400 are rotatably connected to the door frame 200 and can be relatively opened or closed; the latch mechanism 100 is fixedly arranged on the secondary door leaf 300 and can be elastically connected with the primary door leaf 400; the two latch rods 500 are movably arranged in the secondary door leaf 300 and are respectively in transmission connection with the first telescopic arm 33 and the second telescopic arm 35 in the latch mechanism 100, and the first telescopic arm 33 and the second telescopic arm 35 drive the two latch rods 500 to synchronously extend into or retract from the corresponding latch hole 201 on the door frame 200, so that the opening or locking operation of the secondary door leaf 300 is realized.

[0044] It should be noted that the specific working process of the utility model discloses a latch mechanism and a double-leaf door capable of automatically opening a secondary door is as follows:

[0045] When the primary door leaf 400 is opened and the secondary door leaf 300 needs to be manually locked, please refer to Figure 1 and Figure 4As shown, the short end 212 of the connecting rod is pressed inwardly, so that the connecting rod body 21 overcomes the compression force of the torsion spring 22, and the long end 213 of the connecting rod is rotated out of the connecting rod groove 111, and then the long end 213 of the connecting rod is held by hand and rotated outwardly, driving the short end 212 of the connecting rod to rotate inwardly and drive the shifting lever gear 31 to rotate, which in turn drives the first transmission gear 32, the first telescopic arm 33, the second transmission gear 34, and the second telescopic arm 35 to move, so that the first telescopic arm 33 and the second telescopic arm 35 are simultaneously extended out of the shell assembly 10, and the two plug rods 500 are driven by the first telescopic arm 33 and the second telescopic arm 35 to extend into the corresponding plug holes 201; while the second telescopic arm 35 is extended outwardly, the inclined surface of the clamping block 351 moves with the second telescopic arm 35, so as to contact the sliding arc surface 433 on one side of the locking member 43, so that the locking member 43 is forced to move towards the fixed panel 11 and compresses the fourth elastic member 46, and the fourth elastic member 46 accumulates restoring force; when the clamping block 351 moves past the locking member 43 with the second telescopic arm 35, the locking member 43 returns to the initial position under the restoring force of the fourth elastic member 46, thereby clamping the clamping block 351, so that the extension positions of the first telescopic arm 33 and the second telescopic arm 35 are fixed, and the manual locking operation of the secondary door leaf 300 is completed, and at the same time, the first telescopic arm 33 and the second telescopic arm 35 stretch the first elastic member 36 and the second elastic member 37 respectively, so that the first elastic member 36 and the second elastic member 37 accumulate restoring force; when the external force on the long end 213 of the connecting rod disappears, the connecting rod body 21 returns to the connecting rod groove 111 under the restoring force of the torsion spring 22, and the connecting rod body 21 will not be loose under the compression force of the torsion spring 22.

[0046] When the secondary door leaf 300 is locked and the main door leaf 200 is closed, the anti-scratch piece on the side of the main door leaf 200 touches the arc surface of the pressing head 412 of the pressing member 41, pushing the pressing member 41 to retract into the main shell 12, and at this time the main door leaf 200 is normally closed; when the pressing member 41 retracts, the connecting shaft 411 also moves in the direction of the main shell 12, and the third elastic member 45 is compressed against the back of the pressing head 412; the fixed piece 42 also moves inwardly with the fourth elastic member 46 under the driving of the connecting shaft 411, and the movable connecting rod 44 moves to the farthest end of the guide sliding groove 432 under the driving of the fixed piece 42.

[0047] When the main door leaf 200 is opened, the external force acting on the pressing head 412 disappears, the pressing head 412 moves outward under the restoring force of the third elastic member 45, the connecting shaft 411 also moves outward following the movement of the pressing head 412, the connecting shaft 411 drives the fixed plate 42 to move in the direction of the fixed panel 11, the movable connecting rod 44 is driven by the fixed plate 42 to move in the direction of the fixed panel 11 at the same time, and the locking member 43 is compressed to accumulate the restoring force of the fourth elastic member 46; when the sliding arc surface 433 on the locking member 43 moves to the position of contacting the inclined surface of the clamping block 351 on the second telescopic arm 35, the locking member 43 is disconnected with the clamping block 351 through the cooperation of the inclined surface of the clamping block 351 and the sliding arc surface 433, the first telescopic arm 33 and the second telescopic arm 35 are retracted into the main housing 11 under the restoring force of the first elastic member 36 and the second elastic member 37 respectively, and the locking member 43 returns to the initial position under the restoring force of the fourth elastic member 46, at this time, the movable end of the movable connecting rod 44 also slides to the initial position in the guide sliding groove 432, and the first telescopic arm 33 and the second telescopic arm 35 drive the two bolt rods 500 to retract into the secondary door leaf 300 or to be flush with the horizontal plane of the secondary door leaf 300 from the corresponding bolt holes 201 at the same time, so that the secondary door leaf 300 is opened at the same time with the main door leaf 400, and the automatic opening operation of the secondary door leaf 300 is realized.

[0048] The technical features of the above-described embodiments can be combined in any manner, and to make the description concise, not all possible combinations of the technical features in the embodiments are described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the description.

[0049] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the utility model patent. It should be pointed out that for ordinary skilled persons in the art, on the premise of not departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A latch mechanism capable of automatically opening a secondary door, characterized by, The application relates to a door lock mechanism. The door lock mechanism comprises a housing assembly, a connecting rod assembly movably penetrating a side of the housing assembly, a transmission assembly movably penetrating the housing assembly, the connecting rod assembly being capable of driving the transmission assembly to move to realize a manual locking function of a secondary door leaf, and an unlocking assembly movably penetrating the housing assembly and being capable of detachably engaging with the transmission assembly, the unlocking assembly and the transmission assembly being capable of realizing an automatic unlocking function of the secondary door leaf. The transmission assembly comprises a rotating lever gear movably penetrating the housing assembly and being capable of contacting the connecting rod assembly, a first transmission gear movably penetrating the housing assembly and being in meshing transmission connection with the rotating lever gear, a first telescopic arm movably penetrating a side of the housing assembly and being in transmission connection with the first transmission gear, a second transmission gear movably penetrating the housing assembly and being in transmission connection with the first telescopic arm, a second telescopic arm movably penetrating a side of the housing assembly and being in transmission connection with the second transmission gear, the unlocking assembly being capable of detachably engaging with the second telescopic arm, a first elastic member having two ends respectively connected to the housing assembly and the first telescopic arm, and a second elastic member having two ends respectively connected to the housing assembly and the second telescopic arm. First and second racks are respectively arranged on opposite sides of the first telescopic arm, the first rack being in meshing transmission connection with the first transmission gear, and the second rack being in meshing transmission connection with the second transmission gear. The second telescopic arm is fixedly provided with a clamping block capable of detachably engaging with the unlocking assembly, and a slope is arranged at a contact position of the clamping block and the unlocking assembly.

2. The latch mechanism capable of automatically opening the secondary door according to claim 1, wherein, The unlocking assembly comprises a pressing member movably penetrating the housing assembly and movably penetrating a guide piece arranged in the housing assembly, a fixed piece fixedly arranged on the pressing member, a locking member movably penetrating the pressing member and capable of detachably engaging with the clamping block, a movable connecting rod having one end fixedly connected to the fixed piece and the other end slidingly arranged on the locking member, a third elastic member penetrating the pressing member and arranged between the pressing member and the guide piece, and a fourth elastic member penetrating the pressing member and arranged between the fixed piece and the locking member.

3. A latch mechanism capable of automatically opening a secondary door according to claim 2, wherein, A guide sliding groove is arranged on the locking member, and one end of the movable connecting rod is slidingly arranged in the guide sliding groove.

4. The latch mechanism capable of automatically opening the secondary door according to claim 2, wherein, Sliding arc surfaces are respectively arranged on two sides of the locking member contacting the clamping block, and the sliding arc surfaces are in cooperation with the slope of the clamping block.

5. A latch mechanism capable of automatically opening a secondary door according to claim 4, wherein, A third rack is arranged on the same side of the second telescopic arm and the clamping block, and the third rack is in meshing transmission connection with the second transmission gear.

6. A latch mechanism capable of automatically opening a secondary door according to claim 5, wherein, The connecting rod assembly comprises a connecting rod main body and a torsion spring in transmission connection, and the connecting rod main body and the torsion spring are sequentially arranged on a positioning column in the housing assembly; the connecting rod main body comprises an integrated connecting head, a connecting rod short end and a connecting rod long end, the connecting rod short end and the connecting rod long end are arranged on the same straight line and are respectively arranged at two ends of the connecting head.

7. The latch mechanism capable of automatically opening the secondary door according to claim 5, wherein, The application further relates to a door lock mechanism comprising the latch mechanism of any one of claims 1-9.

8. The latch mechanism capable of automatically opening the secondary door according to claim 4, wherein, ​ 9. The latch mechanism capable of automatically opening the secondary door according to claim 1, wherein, ​ 10. A double door capable of automatically opening a secondary door, characterized by, ​ It also includes a door frame, a secondary door leaf, a main door leaf and two latch rods; The door frame is a support body; the secondary door leaf and the main door leaf are respectively rotationally connected to the door frame and can be relatively opened or closed; the latch mechanism is fixedly arranged on the secondary door leaf and a pressing piece thereof can be elastically connected in contact with the main door leaf; two latch rods are respectively movably arranged in the secondary door leaf and are respectively in transmission connection with a first telescopic arm and a second telescopic arm in the latch mechanism.

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