Horizontal push type push rod lock with lock tongue containing safety

Abstract

The invention provides a horizontal-pushing type push rod lock with a safe spring bolt, and relates to the technical field of fire-fighting locks, the horizontal-pushing type push rod lock comprises a horizontal-pushing unlocking part and a lock head part, the horizontal-pushing unlocking part comprises a first shell, a hand pressing plate is installed on the first shell, a push rod assembly is installed in the first shell in a sliding mode, and at least one connecting block of an L-shaped structure is fixedly hinged to the interior of the first shell; one end of the connecting block is fixedly hinged to the hand pressing plate, and the other end is slidably hinged to the push rod assembly; when the hand pressing plate is pressed, the hand pressing plate drives the push rod assembly to move transversely through the connecting block, the end, pulled back, of the push rod assembly is in linkage with a lock body of the lock head part, the other end of the push rod assembly is provided with a connecting groove, and an elastic assembly used for resetting the push rod assembly is further installed in the first shell. The problem of space limitation during intelligent transformation of an existing emergency door lock is solved; a hand pressing plate is designed in the vertical direction, and a motor mounting structure is reserved at the rear end of the lock body, so that the space limitation that electronic elements cannot be integrated in a traditional push rod lock is changed.

Description

Technical Field

[0001] The present invention relates to the technical field of fire locks, and more specifically, it relates to a flat-push push rod lock with a bolt containing an insurance mechanism. Background Art

[0002] In the design of existing building fire doors, a push rod lock with a mortise lock is usually equipped. This kind of lock provides a convenient operation point in case of emergency, allowing people to manually press a button or a hand plate from the inside to unlock and escape. However, due to the structural design of the hand plate and the lock head, it is impossible to install electronic components at the rear end of the lock body in the traditional way, which brings difficulties to the integration of intelligent control systems. Therefore, existing fire doors have to face the problem of space limitation when implementing intelligent transformation.

[0003] For this reason, the improved push rod lock for fire doors has been improved on the basis of the original lock body structure. Specifically, a push rod passing through the lock body is installed on a part of the lock body. The push rod at the front end is responsible for pulling the lock head to achieve the unlocking function, while the push rod at the rear end reserves a structure for accommodating a motor. This design not only improves the unlocking mechanism of the lock head, but also makes the best use of the space of the lock body, creating conditions for installing electronic components. In addition, compared with the traditional inclined downward pressing design, the improved hand plate design is changed to the vertical direction, which not only reduces the force required for operation, but also effectively releases the space at the rear for installing electronic components, making the integration of the intelligent control system more convenient and practical.

[0004] In summary, the space limitation existing in the intelligent transformation process of traditional fire door push rod locks has become an urgent problem to be solved. By introducing a push rod structure into the lock body, not only the unlocking mechanism of the lock head is optimized, but also it provides convenience for the installation of electronic components. Such an improvement not only improves fire safety and escape efficiency, but also greatly enhances the intelligent level of fire doors. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a flat-push push rod lock with a bolt containing an insurance mechanism, which solves the problem of space limitation faced by existing emergency door locks during intelligent transformation.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] The present invention provides a flat-push type push rod lock with a bolt including an insurance function, which comprises a flat-push unlocking part and a lock head part. The flat-push unlocking part includes a first outer shell, on which a hand pressing plate is installed. A push rod assembly is slidably installed in the first outer shell. At least one connecting block with an L-shaped structure is fixedly hinged in the first outer shell. One end of the connecting block is fixedly hinged to the hand pressing plate, and the other end is slidably hinged to the push rod assembly. When the hand pressing plate is pressed, the hand pressing plate drives the push rod assembly to displace horizontally through the connecting block. One end of the push rod assembly that pulls back is linked with the lock body of the lock head part. The other end of the push rod assembly has a connecting groove. An elastic assembly for resetting the push rod assembly is also installed in the first outer shell.

[0008] According to an embodiment of the present invention, a fixed bracket and a mounting bracket are further provided in the first outer shell. The fixed bracket is fixedly connected to the bottom of the hand pressing plate. The mounting bracket is fixedly installed in the first outer shell. A notch corresponding to the hand pressing plate is opened on the upper surface of the first outer shell. The push rod assembly includes a first push rod and a second push rod. A first support seat and a second support seat corresponding to the first push rod and the second push rod respectively are provided on the mounting bracket. A first connecting piece is connected to the first support seat, and a second connecting piece is connected to the second support seat. A second sliding groove for the second push rod to slidably pass through is opened on the first connecting piece. A third sliding groove for the first push rod to slidably pass through is opened on the second connecting piece. Connecting blocks are fixedly hinged to the tops of the first support seat and the second support seat. The connecting block has a first hinge rod, a second hinge rod and a third hinge rod. First hinge holes and second hinge holes connected to the two first hinge rods respectively are opened on the fixed bracket. A third hinge hole for hinging one end of the corresponding third hinge rod is provided at the top of the first support seat. A fourth hinge hole for hinging one end of the corresponding third hinge rod is provided at the top of the second support seat.

[0009] According to an embodiment of the present invention, flanges are provided on the inner side of the notch on the first outer shell. Limit blocks adapted to the flanges are provided on both sides of the fixed bracket. The flanges are used to limit the limit blocks.

[0010] According to an embodiment of the present invention, the elastic component includes a first spring and a second spring. The first push rod includes a first part and a second part. The second spring is sleeved on the second part. A first shoulder for abutting against the second spring is provided at the connection between the first part and the second part. One end of the second spring abuts against the first shoulder, and the other end abuts against the second connecting piece. The first spring is sleeved on the second push rod. One end of the second push rod forms a second shoulder. One end of the first spring abuts against this shoulder, and the other end abuts against the first connecting piece. A push-pull hole is further opened at one end of the second push rod away from the first spring. A first sliding groove is opened at one end of the second push rod away from the push-pull hole. The first sliding groove is slidably hinged to one end of the corresponding second hinge rod and the first part through the second hinge rod, and the other second hinge rod is fixedly hinged to the second part.

[0011] According to an embodiment of the present invention, the lock head includes a lock body. The lock body includes a large lock tongue, a small lock tongue, and a base for installing the two. A bearing bracket is fixedly installed on the base. A linkage bracket is slidably installed in the bearing bracket. The linkage bracket includes a frame body and a sliding plate. The sliding plate is fixedly installed at the bottom end of the frame body. A sixth sliding groove, a first connection hole, a second connection hole, and a third connection hole are opened on the bearing bracket. One ends of the large lock tongue and the small lock tongue are rotatably installed on the bearing bracket through a first support shaft and the first connection hole. A tongue pulling groove is opened on the large lock tongue and the tongue pulling groove is arranged along the radial direction of the large lock tongue. A guiding arc groove is opened on the small lock tongue. A lock pulling shaft passes through the tongue pulling groove and the guiding arc groove at the same time. A fifth sliding groove adapted to the lock pulling shaft is horizontally opened on the frame body. Both ends of the lock pulling shaft extend outwards and are slidably adapted to the sixth sliding groove. One end of the frame body away from the large lock tongue is fixed with a push-pull shaft connected to the push-pull hole. A torsion spring is installed on the large lock tongue. One end of the torsion spring abuts against the top wall of the bearing bracket, and the other end abuts against the large lock tongue.

[0012] According to an embodiment of the present invention, a second connection hole and a third connection hole are formed in the bearing bracket. A third support shaft is fixedly connected in the second connection hole, and a second support shaft is fixedly connected in the third connection hole. A fourth chute for accommodating the second support shaft is transversely formed in the frame body. A top tongue plate is rotatably mounted on the second support shaft. A pull plate ring is fixed in the middle of the upper surface of the top tongue plate. A first tension spring is arranged between the third support shaft and the pull plate ring. One side of the top tongue plate is connected with a top tongue arm that abuts against the small locking tongue. When the small locking tongue abuts against the top tongue arm, the small locking tongue presses the top tongue arm down below the large locking tongue, so that the end of the top tongue plate away from the second support shaft does not interfere with the large locking tongue; A notch is further formed at the bottom of the small locking tongue, and a top tongue groove is formed on the side of the bottom of the large locking tongue facing the top tongue plate. The notch is used for accommodating one end of the top tongue arm, so that the first tension spring lifts one end of the top tongue plate and locks it in the top tongue groove; A rivet is connected to the end of the small locking tongue that abuts against the top tongue arm. One end of the pull lock shaft extending from the guiding arc groove is connected to the rivet through a second tension spring. The guiding arc groove and the pull lock shaft cooperate to limit the rotation amplitude of the small locking tongue. When the small locking tongue rotates to make the notch approach the top tongue arm, the second tension spring is slowly pulled open. A slope for resetting the second tension spring is further arranged on the guiding arc groove.

[0013] According to an embodiment of the present invention, a second outer shell is installed on the lock body, and a first lock tongue groove and a second lock tongue groove corresponding to the large locking tongue and the small locking tongue respectively are formed in the second outer shell.

[0014] According to an embodiment of the present invention, a top plate is fixedly connected to the frame body. A U-shaped groove is formed between the top tongue arm and the top tongue plate. The top plate is located above the U-shaped groove. An inclined surface is further formed on the top plate. When the linkage bracket is pulled, the top plate resists against the U-shaped groove of the top tongue arm through the inclined surface, so as to press down the end of the top tongue plate away from the second support shaft.

[0015] According to an embodiment of the present invention, the base is provided with a T-shaped structure adapted to the second outer shell. The sliding plate is slidably located in the middle of the base. Connecting side plates are arranged on both sides of the T-shaped part of the base. Thread grooves are formed in the connecting side plates. Through holes adapted to the thread grooves are formed in the side wall of the second outer shell. A core groove is further formed in the middle of the base. A lock core is rotatably mounted in the core groove. An unlocking arm that abuts against one end of the sliding plate is arranged on the lock core. When the lock core is rotated, the unlocking arm pushes the sliding plate to displace.

[0016] According to an embodiment of the present invention, a limiting protrusion is arranged on the circumferential inner wall of the core groove, and a limiting edge adapted to the limiting protrusion is arranged on the lock core.

[0017] In summary, the present application includes at least one of the following beneficial technical effects:

[0018] 1. In this solution, by changing the hand pressure plate to a vertical design and reserving a motor installation structure at the rear end of the lock body, the space limitation that traditional push rod locks cannot integrate electronic components is changed. This design not only retains the manual flat-push unlocking function but also provides a physical basis for the intelligent upgrade of fire doors, significantly improving the intelligent level and application scenario expandability of fire doors.

[0019] 2. In this solution, a linkage structure of an L-shaped connecting block and a push rod assembly is adopted. Compared with the traditional inclined downward hand pressure plate, the operating force arm is effectively reduced, and the force required for unlocking is lowered.

[0020] 3. In this solution, through the push rod design penetrating the lock body, the front-end unlocking function and the rear-end electronic component installation space are effectively separated, realizing a modular layout of the mechanical structure and the intelligent system. This compact design not only optimizes the unlocking mechanism of the lock head but also avoids the interference of electronic components on the traditional escape function, ensuring that the lock can still maintain reliable manual operation performance after intelligent transformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the overall structure diagram of the present invention;

[0022] Figure 2 is the exploded view of the flat-push unlocking part in the first embodiment of the present invention;

[0023] Figure 3 is Figure 2 the enlarged structural schematic diagram at A in

[0024] Figure 4 is Figure 2 the enlarged structural schematic diagram at B in

[0025] Figure 5 is Figure 2 the enlarged structural schematic diagram at C in

[0026] Figure 6 is the exploded view of the lock head in the second embodiment of the present invention;

[0027] Figure 7 is the exploded view of the lock body in the second embodiment of the present invention;

[0028] Figure 8 is the main structural schematic diagram of the lock body in the second embodiment of the present invention;

[0029] Figure 9 is the structural schematic diagram of the linkage bracket in the second embodiment of the present invention;

[0030] Figure 10 is Figure 7 the enlarged structural schematic diagram at D in

[0031] Figure 11 This is a schematic structural diagram of the base in the second embodiment of the present invention;

[0032] Figure 12 This is another schematic structural diagram of the second outer shell in the second embodiment of the present invention.

[0033] Reference numerals:

[0034] 1. Flat-push unlocking part; 101. First outer shell; 1011. Flange; 102. Hand pressure plate; 103. Mounting bracket; 104. First push rod; 1041. First part; 1042. Second part; 105. Second push rod; 1051. Push-pull hole; 1052. First chute; 106. Fixed bracket; 1061. First hinge hole; 1062. Second hinge hole; 1063. Limit block; 107. First support seat; 1071. First connecting piece; 1072. Second chute; 1073. Third hinge hole; 108. Second support seat; 1081. Second connecting piece; 1082. Third chute; 1083. Fourth hinge hole; 109. Connecting block; 1091. First hinge rod; 1092. Second hinge rod; 1093. Third hinge rod; 110. Connecting groove; 111. First spring; 112. Second spring; 2. Lock head part; 201. Second outer shell; 2011. First lock tongue groove; 2012. Second lock tongue groove; 2013. Through hole; 202. Base; 2021. Core groove; 2022. Limit protrusion; 2023. Connecting side plate; 20231. Thread groove; 203. Linkage bracket; 2031. Frame body; 20311. Fourth chute; 20312. Fifth chute; 2032. Sliding plate; 2033. Top plate block; 2034. Push-pull shaft; 204. Top tongue plate; 2041. Top tongue arm; 2042. Pulling plate ring; 205. Large lock tongue; 2051. Pulling tongue groove; 2052. Top tongue groove; 206. Small lock tongue; 2061. Guide arc groove; 2062. Slope; 2063. Notch; 2064. Rivet; 207. Bearing bracket; 2071. Sixth chute; 2072. First connecting hole; 2073. Second connecting hole; 2074. Third connecting hole; 208. First support shaft; 209. Torsion spring; 210. Pulling lock shaft; 211. Second support shaft; 212. Third support shaft; 2121. Card slot; 213. First pulling spring; 214. Second pulling spring; 3. Lock core; 301. Unlocking arm; 302. Limit edge. Detailed implementation manners

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] As Figure 1 shown, it is a flat-push type push rod lock with a locking tongue containing insurance in the first embodiment of the present invention. The flat-push type floor and emergency door lock mainly includes two main parts: a flat-push unlocking part 1 and a lock head part 2. Next, as Figure 2 shown, the flat-push unlocking part 1 includes a first outer shell 101. A hand pressure plate 102 is installed on the first outer shell 101. A push rod assembly is slidably installed in the first outer shell 101. Two L-shaped connecting blocks 109 are fixedly hinged in the first outer shell 101. One end of the connecting block 109 is fixedly hinged to the hand pressure plate 102, and the other end is slidably hinged to the push rod assembly. The lock head part 2 mainly includes a lock body, and a second outer shell 201 for protecting the lock body is installed on the lock body; when the hand pressure plate 102 is pressed, the hand pressure plate 102 drives the push rod assembly to move horizontally through the connecting block 109. One end of the push rod assembly that pulls back is linked with the lock body of the lock head part 2. The other end of the push rod assembly has a connecting groove 110. An elastic component for resetting the push rod assembly is also installed in the first outer shell 101.

[0037] Furthermore, a fixed bracket 106 and a mounting bracket 103 are also provided in the first outer shell 101. The fixed bracket 106 is fixedly connected to the bottom of the hand pressure plate 102. The mounting bracket 103 is fixedly installed in the first outer shell 101. A notch corresponding to the hand pressure plate 102 is opened on the upper surface of the first outer shell 101. Under the guidance of the L-shaped connecting block 109, the hand pressure plate 102 can vertically move at the notch of the first outer shell 101. Therefore, it will not move back and forth in the first outer shell 101, which is convenient for installing electronic components such as motors at the rear end of the first outer shell 101 to achieve intelligent control. Moreover, by horizontally pulling the penetrating push rod assembly, it is easier to cooperate with the electronic components. That is, it reduces the lateral movement generated during the pressing of the hand pressure plate, facilitates the installation and use of electronic components, and reduces the mutual interference between the hand pressure plate and the electronic components.

[0038] Again, as Figure 2 shown, the push rod assembly in this embodiment includes a first push rod 104 and a second push rod 105. First support seats 107 and second support seats 108 corresponding to the first push rod 104 and the second push rod 105 respectively are provided on the mounting bracket 103; as Figure 4 and 5As shown, a first connecting piece 1071 is connected to the first support base 107, and a second connecting piece 1081 is connected to the second support base 108. A second sliding groove 1072 for the second push rod 105 to pass through in a sliding manner is formed in the first connecting piece 1071, and a third sliding groove 1082 for the first push rod 104 to pass through in a sliding manner is formed in the second connecting piece 1081. Combining with Figure 3 As shown, connecting blocks 109 are fixedly hinged to the tops of the first support base 107 and the second support base 108. The connecting blocks 109 are provided with a first hinged rod 1091, a second hinged rod 1092, and a third hinged rod 1093. A first hinged hole 1061 and a second hinged hole 1062 connected to the two first hinged rods 1091 are respectively formed in the fixed bracket 106. A third hinged hole 1073 hinged to one end of the corresponding third hinged rod 1093 is provided at the top of the first support base 107, and a fourth hinged hole 1083 hinged to one end of the corresponding third hinged rod 1093 is provided at the top of the second support base 108. During the process of unlocking the flat push unlocking part 1, secondly, the first support base 107 and the second support base 108 provide stable force transmission fulcrums for the first push rod 104 and the second push rod 105. The first connecting piece 1071 and the second connecting piece 1081 increase the connectivity of the structure. Through the second sliding groove 1072 on the first connecting piece 1071 and the third sliding groove 1082 on the second connecting piece 1081, the push rod can smoothly pull the lock head 2 along the sliding groove to unlock, ensuring that the push rod can maintain linear sliding during the movement process, reducing friction and skew, and improving the accuracy of the push rod movement. In addition, the two connecting blocks 109 serve as pivot points, enabling the first support base 107 and the second support base 108 to rotate around the hinged holes on the fixed bracket 106, endowing the entire push rod assembly with flexibility.

[0039] Immediately afterwards, a flanging 1011 is provided on the inner side of the notch of the first housing 101, and limiting blocks 1063 adapted to the flanging 1011 are provided on both sides of the fixed bracket 106. The flanging 1011 is used to limit the limiting blocks 1063. In this embodiment, the alignment and limitation of the hand pressure plate 102 are achieved through the cooperation of the flanging 1011 and the notch, avoiding loosening or falling off of the hand pressure plate 102 during use.

[0040] Among them, the elastic component includes a first spring 111 and a second spring 112. The first push rod 104 includes a first part 1041 and a second part 1042. A second spring 112 is sleeved on the second part 1042. A first shoulder for abutting against the second spring 112 is provided at the connection between the first part 1041 and the second part 1042. One end of the second spring 112 abuts against the first shoulder, and the other end abuts against the second connecting piece 1081. A first spring 111 is sleeved on the second push rod 105. A second shoulder is formed at one end of the second push rod 105. One end of the first spring 111 abuts against the shoulder, and the other end abuts against the first connecting piece 1071. A push-pull hole 1051 is further opened at one end of the second push rod 105 away from the first spring 111. A first sliding groove 1052 is opened at one end of the second push rod 105 away from the push-pull hole 1051. The first sliding groove 1052 is slidably hinged to one end of the corresponding second hinge rod 1092 and the first part 1041, and the other second hinge rod 1092 is fixedly hinged to the second part 1042. Specifically, the first spring 111 and the second spring 112 are mainly used to provide elastic support and reset functions. The first spring 111 is installed on the second push rod 105 to push the second push rod 105 to move along the first sliding groove 1052 to realize the overall movement of the device. The second spring 112 is installed between the two parts of the first push rod 104 to provide a reverse elastic force through the first shoulder and the second connecting piece 1081, so that the first push rod 104 can be reset. The two parts of the first push rod 104 are connected to each other through the first shoulder and act together. The push-pull hole 1051 provided on the second push rod 105 unlocks the lock head part.

[0041] As Figure 6 and 7 shown, it is a flat-push type push rod lock with a locking tongue containing a safety device according to the second embodiment of the present invention. On the basis of the first embodiment, the lock head part 2 includes a lock body, and the lock body includes a large locking tongue 205, a small locking tongue 206, and a base 202 for installing the two. A first locking tongue groove 2011 and a second locking tongue groove 2012 corresponding to the large locking tongue 205 and the small locking tongue 206 respectively are opened on the second outer shell 201. A bearing bracket 207 is fixedly installed on the base 202, and a linkage bracket 203 is slidably installed in the bearing bracket 207. As Figure 9As shown in the figure, the linkage bracket 203 includes a bracket body 2031 and a sliding plate 2032. The sliding plate 2032 is fixedly installed at the bottom end of the bracket body 2031. The bearing bracket 207 is provided with a sixth chute 2071, a first connection hole 2072, a second connection hole 2073 and a third connection hole 2074. Through these chutes and connection holes, the linkage bracket 203 is slidably installed on the bearing bracket 207. Then, one ends of the large lock tongue 205 and the small lock tongue 206 are rotatably installed on the bearing bracket 207 through a first support shaft 208 and the first connection hole 2072. A tongue pulling groove 2051 is provided on the large lock tongue 205 and the tongue pulling groove 2051 is arranged along the radial direction of the large lock tongue 205. A guiding arc groove 2061 is provided on the small lock tongue 206. A pull lock shaft 210 is simultaneously inserted through the tongue pulling groove 2051 and the guiding arc groove 2061. A fifth chute 20312 adapted to the pull lock shaft 210 is horizontally provided on the bracket body 2031. Both ends of the pull lock shaft 210 extend outwards and are slidably adapted to the sixth chute 2071. Through the chutes and connection holes adapted to the large lock tongue 205 and the small lock tongue 206, one end of the large lock tongue 205 is rotatably connected to the bearing bracket 207, while the other end is slidably adapted to the bracket body 2031. In addition, a push-pull shaft 2034 connected to the push-pull hole 1051 is fixed at one end of the bracket body 2031 away from the large lock tongue 205. At this time, when pressing the hand pressure plate 102, the push-pull shaft 2034 can be pulled to move outwards through the push rod assembly, and the bracket body 2031 can be pulled to move through the push-pull shaft 2034. Since one end of the large lock tongue 205 is in a hinged state, the large lock tongue 205 will show a retracting action and form an unlocking state. Since a coil spring 209 is installed on the large lock tongue 205, one end of the coil spring 209 abuts against the top wall of the bearing bracket 207, and the other end abuts against the large lock tongue 205. When releasing the hand pressure plate 102, the push-pull shaft 2034 is reset under the action of the first spring 111 and the second spring 112, and the large lock tongue 205 is also reset under the action of the coil spring 209 to form a locking state.

[0042] Furthermore, for another example Figure 7As shown in the figure, the bearing bracket 207 is provided with a second connection hole 2073 and a third connection hole 2074. A third support shaft 212 is fixedly connected in the second connection hole 2073, and a second support shaft 211 is fixedly connected in the third connection hole 2074. A fourth chute 20311 for accommodating the second support shaft 211 is horizontally formed on the frame body 2031. A top tongue plate 204 is rotatably mounted on the second support shaft 211. A pull plate ring 2042 is fixed in the middle of the upper surface of the top tongue plate 204. A first tension spring 213 is arranged between the third support shaft 212 and the pull plate ring 2042, and a card slot 2121 for installing one end of the first tension spring 213 is formed on the third support shaft 212. One side of the top tongue plate 204 is connected with a top tongue arm 2041 that abuts against the small locking tongue 206. When the small locking tongue 206 abuts against the top tongue arm 2041, the small locking tongue 206 presses down the top tongue arm 2041 to below the large locking tongue 205, so that the end of the top tongue plate 204 away from the second support shaft 211 does not interfere with the large locking tongue 205; combined with Figure 10 As shown in the figure, a notch 2063 is further formed at the bottom of the small locking tongue 206. A top tongue groove 2052 is formed on the side of the bottom of the large locking tongue 205 facing the top tongue plate 204. The notch 2063 is used to accommodate one end of the top tongue arm 2041, so that the first tension spring 213 lifts one end of the top tongue plate 204 and locks it in the top tongue groove 2052.

[0043] Again, Figure 9 As shown in the figure, a top plate 2033 is fixedly connected to the bottom edge of one side of the frame body 2031. A U-shaped groove is formed between the top tongue arm 2041 and the top tongue plate 204, and the top plate 2033 is exactly located above the U-shaped groove. When the linkage bracket 203 is pulled, the top plate 2033 on the frame body 2031 resists against the U-shaped groove of the top tongue arm 2041, thereby pressing down the end of the top tongue plate 204 away from the second support shaft 211, so that the top tongue plate 204 is staggered from the top tongue groove 2052 on the large locking tongue 205, avoiding the top tongue plate 204 from being inserted into the top tongue groove 2052 and enabling the large locking tongue 205 to work properly. In addition, in order to enable the top plate 2033 to better press down the top tongue plate 204, an inclined surface is further formed on the bottom side of the top plate 2033 facing the U-shaped groove, so that the top plate 2033 presses down the U-shaped groove of the top tongue arm 2041 more smoothly, avoiding jamming after the top plate 2033 abuts against the top tongue arm 2041 and improving the stability of the emergency door lock during use.

[0044] Such as Figure 8As shown, a rivet 2064 is connected to one end of the small locking tongue 206 that abuts against the top tongue arm 2041. One end of the rivet 2064 is connected to one end of the pull - lock shaft 210 extending from the guiding arc groove 2061 through a second tension spring 214. The guiding arc groove 2061 cooperates with the pull - lock shaft 210 to limit the rotation amplitude of the small locking tongue 206. When the small locking tongue 206 rotates to make the notch 2063 approach the top tongue arm 2041, the second tension spring 214 is slowly pulled open. A slope 2062 for the reset of the second tension spring 214 is also provided on the guiding arc groove 2061. It should be noted that the small locking tongue 206 of this embodiment provides insurance for the emergency door lock. When the large locking tongue 205 is rotated alone, under the action of the guiding arc groove 2061, the large locking tongue 205 drives the small locking tongue 206 to rotate along through one end of the pull - lock shaft 210. At this time, the top plate 2033 abuts against the top tongue arm 2041 as mentioned before, pressing the top tongue plate 204 downward, making the insurance ineffective. When the small locking tongue 206 is rotated alone, still under the action of the guiding arc groove 2061, the large locking tongue 205 does not rotate along. At this time, one end of the top tongue arm 2041 on the top tongue plate 204 will enter the notch 2063 on the small locking tongue 206, that is, one end of the top tongue arm 2041 is released. Then the top tongue plate 204 is lifted under the action of the first tension spring 213, making the top tongue plate 204 flush with the top tongue groove 2052 on the large locking tongue 205. At this time, the large locking tongue 205 cannot retract, forming an insurance state.

[0045] As Figure 7 and 11 shown, the base 202 of this embodiment is set as a T - shaped structure adapted to the second outer shell 201 so as to better install the second outer shell 201. Specifically, the sliding plate 2032 is slidably located in the middle of the base 202. Connecting side plates 2023 are provided on both sides of the T - shaped part of the base 202, and threaded grooves 20231 are opened on the connecting side plates 2023. As Figure 12 shown, through holes 2013 adapted to the threaded grooves 20231 are opened on the side wall of the second outer shell 201. Then, as Figure 11 shown, in order to realize key unlocking, a core groove 2021 for installing the lock core 3 is also opened in the middle of the base 202. Specifically, the lock core 3 is rotatably installed in the core groove 2021, and an unlocking arm 301 that abuts against one end of the sliding plate 2032 is provided on the lock core 3. When the lock core 3 is rotated, the unlocking arm 301 pushes the sliding plate 2032 to displace.

[0046] Furthermore, in order to ensure the use effect of the lock core 3, a limiting protrusion 2022 is provided on the circumferential inner wall of the core groove 2021, and a limiting edge 302 adapted to the limiting protrusion 2022 is provided on the lock core 3. The limiting protrusion 2022 and the limiting edge 302 cooperate to limit the rotation angle of the lock core 3, ensuring the fixed angle of the lock core 3 in the open and locked states, and preventing damage or failure of the lock core 3 caused by excessive rotation. The limiting edge 302 on the lock core 3 and the limiting protrusion 2022 cooperate with each other to form an effective angle limiting mechanism, so that the lock core 3 can rotate safely and stably within a specific range.

[0047] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A flat-push type push-rod lock with a bolt containing an insurance device, comprising a flat-push unlocking part (1) and a lock head part (2), characterized in that: The flat-pushing unlocking part (1) includes a first housing (101). A hand pressing plate (102) is installed on the first housing (101). A push rod assembly is slidably installed in the first housing (101). At least one connecting block (109) with an L-shaped structure is fixedly hinged in the first housing (101). One end of the connecting block (109) is fixedly hinged to the hand pressing plate (102), and the other end is slidably hinged to the push rod assembly. When the hand pressing plate (102) is pressed, the hand pressing plate (102) drives the push rod assembly to displace horizontally through the connecting block (109). One end of the push rod assembly that pulls back is linked with the lock body of the lock head part (2). The other end of the push rod assembly has a connecting groove (110). An elastic assembly for resetting the push rod assembly is also installed in the first housing (101).

2. The flat push rod lock with a locking tongue containing a safety device according to claim 1, characterized in that: A fixed bracket (106) and a mounting bracket (103) are also provided in the first housing (101). The fixed bracket (106) is fixedly connected to the bottom of the hand pressing plate (102). The mounting bracket (103) is fixedly installed in the first housing (101). A notch corresponding to the hand pressing plate (102) is opened on the upper surface of the first housing (101). The push rod assembly includes a first push rod (104) and a second push rod (105). A first support seat (107) and a second support seat (108) corresponding to the first push rod (104) and the second push rod (105) respectively are provided on the mounting bracket (103). A first connecting piece (1071) is connected to the first support seat (107). A second connecting piece (1081) is connected to the second support seat (108). A second sliding groove (1072) for the second push rod (105) to slidably pass through is opened on the first connecting piece (1071). A third sliding groove (1082) for the first push rod (104) to slidably pass through is opened on the second connecting piece (1081). Connecting blocks (109) are fixedly hinged to the tops of the first support seat (107) and the second support seat (108). The connecting block (109) has a first hinge rod (1091), a second hinge rod (1092) and a third hinge rod (1093). A first hinge hole (1061) and a second hinge hole (1062) connected to the two first hinge rods (1091) respectively are opened on the fixed bracket (106). A third hinge hole (1073) hinged to one end of the corresponding third hinge rod (1093) is provided at the top of the first support seat (107). A fourth hinge hole (1083) hinged to one end of the corresponding third hinge rod (1093) is provided at the top of the second support seat (108).

3. The flat push rod lock with a locking tongue containing a safety device according to claim 2, characterized in that: Flanges (1011) are provided on the inner sides of the notches on the first housing (101). Limit blocks (1063) adapted to the flanges (1011) are provided on both sides of the fixed bracket (106). The flanges (1011) are used to limit the limit blocks (1063).

4. The flat-push type push rod lock with a locking tongue including a safety device according to claim 3, characterized in that: The elastic component includes a first spring (111) and a second spring (112). The first push rod (104) includes a first part (1041) and a second part (1042). The second spring (112) is sleeved on the second part (1042). A first shoulder for abutting against the second spring (112) is provided at the connection between the first part (1041) and the second part (1042). One end of the second spring (112) abuts against the first shoulder, and the other end abuts against the second connecting piece (1081). The first spring (111) is sleeved on the second push rod (105). One end of the second push rod (105) forms a second shoulder. One end of the first spring (111) abuts against this shoulder, and the other end abuts against the first connecting piece (1071). A push-pull hole (1051) is further formed at one end of the second push rod (105) away from the first spring (111) and away from the second shoulder. A first sliding groove (1052) is formed at one end of the second push rod (105) away from the push-pull hole (1051). The first sliding groove (1052) is slidably hinged to one end of the corresponding second hinge rod (1092) and the first part (1041), and the other second hinge rod (1092) is fixedly hinged to the second part (1042).

5. The flat push rod lock with a locking tongue including insurance according to any one of claims 1 to 4, characterized in that: The lock head (2) includes a lock body, which comprises a large lock tongue (205), a small lock tongue (206) and a base (202) for installing the two. A bearing bracket (207) is fixedly installed on the base (202). A linkage bracket (203) is slidably installed in the bearing bracket (207). The linkage bracket (203) includes a frame body (2031) and a sliding plate (2032). The sliding plate (2032) is fixedly installed at the bottom end of the frame body (2031). A sixth chute (2071), a first connection hole (2072), a second connection hole (2073) and a third connection hole (2074) are formed in the bearing bracket (207). One ends of the large lock tongue (205) and the small lock tongue (206) are rotatably installed on the bearing bracket (207) through a first support shaft (208) and the first connection hole (2072). A tongue pulling groove (2051) is formed in the large lock tongue (205) and the tongue pulling groove (2051) is arranged along the radial direction of the large lock tongue (205). A guiding arc groove (2061) is formed in the small lock tongue (206). A lock pulling shaft (210) passes through the tongue pulling groove (2051) and the guiding arc groove (2061) at the same time. A fifth chute (20312) adapted to the lock pulling shaft (210) is transversely formed in the frame body (2031). Two ends of the lock pulling shaft (210) extend outwards and are slidably adapted to the sixth chute (2071). A pushing and pulling shaft (2034) connected to the pushing and pulling hole (1051) is fixed at one end of the frame body (2031) away from the large lock tongue (205). A coil spring (209) is installed on the large lock tongue (205). One end of the coil spring (209) abuts against the top wall of the bearing bracket (207), and the other end abuts against the large lock tongue (205).

6. The flat push rod lock with a locking tongue containing a safety device according to claim 5, characterized in that: The bearing bracket (207) is provided with a second connection hole (2073) and a third connection hole (2074). A third support shaft (212) is fixedly connected in the second connection hole (2073), and a second support shaft (211) is fixedly connected in the third connection hole (2074). A fourth chute (20311) for accommodating the second support shaft (211) is transversely provided on the frame body (2031). A top tongue plate (204) is rotatably mounted on the second support shaft (211). A pull plate ring (2042) is fixed in the middle of the upper surface of the top tongue plate (204). A first tension spring (213) is provided between the third support shaft (212) and the pull plate ring (2042). One side of the top tongue plate (204) is connected with a top tongue arm (2041) that abuts against the small locking tongue (206). When the small locking tongue (206) abuts against the top tongue arm (2041), the small locking tongue (206) presses the top tongue arm (2041) down below the large locking tongue (205) so that the end of the top tongue plate (204) away from the second support shaft (211) does not interfere with the large locking tongue (205). A notch (2063) is further provided at the bottom of the small locking tongue (206). A top tongue groove (2052) is provided on the side of the bottom of the large locking tongue (205) facing the top tongue plate (204). The notch (2063) is used to accommodate one end of the top tongue arm (2041) so that the first tension spring (213) lifts one end of the top tongue plate (204) and catches it in the top tongue groove (2052). A rivet (2064) is connected to the end of the small locking tongue (206) that abuts against the top tongue arm (2041). The rivet (2064) is connected to one end of a pull lock shaft (210) extending from a guiding arc groove (2061) through a second tension spring (214). The guiding arc groove (2061) and the pull lock shaft (210) cooperate to limit the rotation amplitude of the small locking tongue (206). When the small locking tongue (206) rotates to make the notch (2063) approach the top tongue arm (2041), the second tension spring (214) is slowly pulled open. A slope (2062) for the reset of the second tension spring (214) is further provided on the guiding arc groove (2061).

7. The flat push rod lock with a locking tongue having a safety feature according to claim 6, characterized in that: A second outer shell (201) is installed on the lock body. A first lock tongue groove (2011) and a second lock tongue groove (2012) corresponding to the large locking tongue (205) and the small locking tongue (206) respectively are provided on the second outer shell (201).

8. The flat push rod lock with a locking tongue containing a safety device according to claim 7, characterized in that: A top plate block (2033) is fixedly connected to the frame body (2031). A U-shaped groove is formed between the top tongue arm (2041) and the top tongue plate (204). The top plate block (2033) is located above the U-shaped groove. An inclined surface is further provided on the top plate block (2033). When the linkage bracket (203) is pulled, the top plate block (2033) resists against the U-shaped groove of the top tongue arm (2041) through the inclined surface so as to press down the end of the top tongue plate (204) away from the second support shaft (211).

9. The flat push rod lock with a locking tongue containing a safety device according to claim 8, characterized in that: The base (202) is arranged in a T-shaped structure adapted to the second housing (201). The sliding plate (2032) is slidably located in the middle of the base (202). Connecting side plates (2023) are arranged on both sides of the T-shaped part of the base (202). Thread grooves (20231) are formed in the connecting side plates (2023). Through holes (2013) adapted to the thread grooves (20231) are formed in the side wall of the second housing (201). A core groove (2021) is further formed in the middle of the base (202). A lock core (3) is rotatably installed in the core groove (2021). An unlocking arm (301) that abuts against one end of the sliding plate (2032) is provided on the lock core (3). When the lock core (3) is rotated, the unlocking arm (301) pushes the sliding plate (2032) to displace.

10. The flat push rod lock with a locking tongue containing a safety device according to claim 9, characterized in that: A limiting protrusion (2022) is provided on the circumferential inner wall of the core groove (2021). A limiting edge (302) adapted to the limiting protrusion (2022) is provided on the lock core (3).

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