A drive lock

Abstract

The present application relates to the technical field of lock, disclose a kind of transmission lockers, comprising: fixed groove plate, it extends along left and right direction, the fixed groove plate is surrounded and is formed with straight groove with notch upward;Transmission rod, slidingly connected in the straight groove, the transmission rod top side is integrally formed with transmission part, and the transmission part top side is spaced apart with at least two along left and right direction;Lock box, it is arranged in the fixed groove plate top side, the transmission block is rotatably connected in the lock box, the transmission block outside is formed with connecting rod, and the connecting rod one end extends between two transmission parts and is formed with transmission head, and the transmission head is between two transmission parts, the present application can improve the torque output by transmission rod, facilitate enough compression force to be provided to the cooperation of lock point and lock seat, reduce the situation that sash is easily shaken after being closed.

Description

Technical Field

[0001] This invention relates to the field of lock technology, and more particularly to a transmission locking device. Background Technology

[0002] Transmission locking devices are used to transmit power when door and window handles are turned. In use, the square shaft of the handle is inserted into the gear of the transmission locking device. When the handle is turned, power is transmitted to the transmission rod through the meshing of the gear and rack, thereby locking or unlocking the locking points on the transmission rod. This gear-based power transmission method has a relatively simple structure and can only transmit a small torque, generally not exceeding 20 Newtons, making it difficult to ensure a stronger clamping force between the locking points and the lock seat. Therefore, there is an urgent need for a transmission locking device that can transmit a higher torque. Summary of the Invention

[0003] The purpose of this invention is to provide a transmission locking device to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0004] The solution to the technical problem of this invention is: A transmission locking device includes: a fixed groove plate extending in a left-right direction, the fixed groove plate forming a straight groove with the opening facing upward; a transmission rod slidably connected within the straight groove, the top side of the transmission rod integrally formed with a transmission part, the top side of the transmission part having at least two spaced apart in a left-right direction; a lock box disposed on the top side of the fixed groove plate, a transmission block rotatably connected within the lock box, a connecting rod formed on the outer side of the transmission block, one end of the connecting rod extending between the two transmission parts and forming a transmission head, the transmission head being located between the two transmission parts.

[0005] This technical solution has at least the following beneficial effects: During installation, the fixing plate is installed inside the sash frame, and then the handle is installed. The square shaft on the handle passes through the pre-set opening on the transmission block and is connected to the transmission block for transmission. When in use, when it is necessary to lock or open the window sash, the handle is rotated, and the square shaft drives the transmission block to rotate. At this time, the connecting rod on the outside of the transmission block rotates around the transmission block. The transmission head at the end of the connecting rod pushes the transmission part, thereby driving the transmission rod to slide in the straight groove. Since the transmission part is directly integrally formed on the top side of the transmission rod, the process of docking and assembling the transmission part on the transmission rod is saved, which improves the production efficiency of the transmission rod. In this way, the power of the reciprocating rotation of the transmission block is directly transmitted to the transmission part through the transmission head, and the transmission head always provides power to the transmission part during the entire rotation of the transmission block, so that the transmission rod slides back and forth in the straight groove, thereby increasing the output torque of the transmission rod. This is beneficial for providing sufficient clamping force for the locking point and the locking seat, and reducing the situation where the window sash is easy to shake after closing.

[0006] As a further improvement to the above technical solution, the transmission rod is provided with two first clearance holes along the front-rear direction. Transmission plates are connected to the transmission rod on the side of the two first clearance holes that are close to each other. The two transmission plates are bent upwards to form two transmission parts. During the production of the transmission rod, the two transmission plates are respectively placed inside the two first clearance holes, and then the two transmission plates are punched and bent so that the bent transmission plates protrude from the two first clearance holes. This allows two transmission parts to be directly formed on the transmission rod. Furthermore, the design of the first clearance holes reduces the weight of the transmission rod. During assembly and use, the transmission head extends between the ends of the two transmission plates, and by applying a pushing force to the end of either of the two transmission parts, the transmission rod is driven to slide.

[0007] As a further improvement to the above technical solution, a limiting block is formed on the outer side of the transmission block at a position corresponding to at least one of the first clearance holes, and the limiting block extends into the first clearance hole directly opposite it. By using the limiting block extending into the first clearance hole, the forward and backward position of the transmission rod can be limited, which helps to keep the transmission head within the two transmission parts, thereby ensuring that the transmission block can stably drive the transmission rod to slide when rotating.

[0008] As a further improvement to the above technical solution, the front and rear sides of the transmission rod are bent downwards to form side wings. The two side wings abut against the bottom of the straight groove, and the limiting block extends downwards into the area between the two side wings. The downward bending of the front and rear sides of the transmission rod enhances its bending resistance and improves its structural stability when outputting power. Furthermore, the side wings on the front and rear sides of the transmission rod raise its height, creating an area between the transmission rod and the bottom of the straight groove that can accommodate the limiting block. Extending the limiting block downwards into this area helps to keep it within the first clearance hole throughout the entire rotation process, further improving the stability of power transmission between the transmission head and the transmission part.

[0009] As a further improvement to the above technical solution, a stop block is movably connected to the bottom of the straight groove. A first stop surface and a second stop surface are formed on the top side of the stop block. The first stop surface and the second stop surface extend upward in a direction that approaches each other. An elastic member is provided between the stop block and the bottom of the straight groove. The elastic member can lift the stop block upward until the end corner of the bottom of the limiting block abuts against the first stop surface or the second stop surface. When the transmission block rotates to drive the transmission rod to engage the locking point and the locking seat, it usually rotates to the left or right to the end of its stroke to maintain the locking or unlocking function. When the transmission block rotates to the end of its stroke at either end, the elastic force of the elastic element pushes the stop block upward to the bottom of the limit block. At this time, the first stop surface or the second stop surface abuts against the end corner of the bottom of the limit block, thus ensuring the position of the transmission block and further maintaining the output rod's outward output of power to the locking point and the locking seat, improving the stability of the locking device during use. When the transmission block rotates again, the end corner on one side of the bottom of the limit block is pressed down by the inclined guide of the first stop surface or the second stop surface, causing the elastic element to compress elastically. After the end corner on one side of the bottom of the limit block passes the highest point of the first stop surface or the second stop surface, it rotates to the end of the other stroke. At this time, the elastic restoring force of the elastic element can press the second stop surface or the first stop surface against the end corner on the other side of the bottom of the limit block.

[0010] As a further improvement to the above technical solution, two stop blocks are provided along the left-right direction. The limiting block can rotate until its bottom right corner abuts against the leftmost first stop surface, or its bottom surface abuts against the adjacent first and second stop surfaces, or its bottom surface abuts against the rightmost second stop surface. When the transmission block rotates, it can form three strokes as needed. Specifically, when the transmission block rotates to the left to the end of its stroke, the elastic force of the elastic element lifts the stop block upwards to the bottom of the limiting block. At this time, the first stop surface abuts against the bottom right corner of the limiting block, thus maintaining the position of the transmission block rotating to the left to the end of its stroke. When the transmission block rotates to the right, the bottom right corner of the limiting block is guided downwards by the tilt of the first stop surface, causing the elastic element to compress elastically. After the bottom right corner of the limiting block passes the highest point of the first stop surface, it falls between the two stop blocks. At this time, the bottom surface of the limiting block abuts against the second stop surface of the left stop block. And the first stop surface of the right stop block, so that the transmission block can be kept rotating to the middle position of the stroke; when the transmission block continues to rotate to the right to the end of the stroke, the bottom left corner of the limit block uses the tilt guide of the first stop surface of the right stop block to press down the right stop block, so that the elastic element is elastically compressed. After the bottom left corner of the limit block passes the highest point of the first stop surface, the elastic restoring force of the elastic element can press the second stop surface against the bottom left corner of the limit block, thereby keeping the transmission block rotating to the right to the end of the stroke. This can provide a feel after the stroke is in place when the transmission block rotates, and better maintain the stability of the transmission block after it is in place.

[0011] As a further improvement to the above technical solution, the two bottom corners of the stop blocks, which are close to each other, are rotatably connected to the bottom of the straight groove, and the two elastic elements are respectively connected to the bottom corners of the two stop blocks, which are far apart from each other. When the elastic elements provide an upward lifting force to the stop blocks, the stop blocks can rotate upward to abut against the limiting block. When the limiting block presses down against the stop blocks, the stop blocks rotate downward to avoid the movement of the limiting block. When the limiting block rotates between the two stop blocks, since the two elastic elements provide upward elastic force at the positions where the bottoms of the two stop blocks are far apart, the two stop blocks rotate in the direction of approaching each other, thereby better limiting and maintaining the limiting block between the two stop blocks.

[0012] As a further improvement to the above technical solution, the elastic element is a torsion spring. The torsion spring provides an upward elastic support force to the stop block, better cooperating to rotate the stop block closer to or away from the limiting block.

[0013] As a further improvement to the above technical solution, end caps are connected to both ends of the transmission rod. The end caps can cover the ends of the transmission rod, reducing the area exposed between the transmission rod and the straight groove, thereby reducing the entry of foreign objects that could affect the sliding of the transmission rod.

[0014] As a further improvement to the above technical solution, the present invention also includes a limiting plate located between the lock box and the fixed groove plate. The transmission rod is provided with a second clearance hole extending in the left-right direction, and the limiting plate is provided with a third clearance hole. A first connector and a second connector are passed through the bottom side of the fixed groove plate upwards. The first connector passes through the second clearance hole and is connected to the limiting plate, while the second connector passes through the second clearance hole and the third clearance hole and is connected to the lock box. The limiting plate is fixed to the top side of the fixed groove plate using the first connector. At this time, the limiting plate can limit the position of the transmission rod within the fixed groove plate, preventing the fixed groove plate from detaching outwards, thus achieving a sliding connection of the transmission rod within the fixed groove plate. The lock box is connected to the fixed groove plate by the second connector passing through the second clearance hole on the transmission rod and the third clearance hole on the limiting plate, thereby relatively fixing the lock box to the fixed groove plate. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of the present invention, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0016] Figure 1 This is an overall perspective view of the present invention.

[0017] Figure 2 This is a perspective view of the transmission rod of the present invention.

[0018] Figure 3 This is an overall top view of the present invention.

[0019] Figure 4 yes Figure 3 A schematic diagram of the AA cross-sectional structure.

[0020] Figure 5 yes Figure 3 A schematic diagram of the BB cross-sectional structure.

[0021] In the attached diagram: 1-fixed groove plate, 2-transmission rod, 21-transmission part, 22-first clearance hole, 23-side wing, 24-end cover, 25-second clearance hole, 3-lock box, 31-transmission block, 311-connecting rod, 312-transmission head, 32-limiting block, 4-stopping block, 41-first stop surface, 42-second stop surface, 43-elastic element, 5-limiting plate, 51-third clearance hole. Detailed Implementation

[0022] The following will clearly and completely describe the concept, specific structure, and technical effects of the present invention in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention. Furthermore, all connection relationships mentioned herein do not simply refer to direct connection of components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this invention can be combined interactively without contradicting each other.

[0023] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 A transmission locking device includes: a fixed groove plate 1 extending in a left-right direction, the fixed groove plate 1 forming a straight groove with the opening facing upward; a transmission rod 2 slidably connected in the straight groove, the top side of the transmission rod 2 having an integrally formed transmission part 21, the top side of the transmission part 21 having at least two spaced apart in a left-right direction; a lock box 3 disposed on the top side of the fixed groove plate 1, the lock box 3 having a transmission block 31 rotatably connected inside the lock box 3, the outer side of the transmission block 31 having a connecting rod 311 formed thereon, one end of the connecting rod 311 extending between the two transmission parts 21 and forming a transmission head 312, the transmission head 312 being located between the two transmission parts 21.

[0024] In this transmission locking device, during installation, the fixing groove plate 1 is installed inside the sash frame, and then the handle is installed. The square shaft on the handle passes through the pre-set opening on the transmission block 31 and is connected to the transmission block 31 for transmission. In use, when it is necessary to lock or open the window sash, the handle is rotated, which drives the transmission block 31 to rotate through the square shaft. At this time, the connecting rod 311 on the outside of the transmission block 31 rotates around the transmission block 31, and the transmission head 312 at the end of the connecting rod 311 pushes the transmission part 21, thereby driving the transmission rod 2 to slide in the straight groove. Since the transmission part 21 is directly integrally formed... Located on the top side of the transmission rod 2, this design eliminates the need for connecting and assembling the transmission part 21 onto the transmission rod 2, thus improving the production efficiency of the transmission rod 2. In this way, the power of the reciprocating rotation of the transmission block 31 is directly transmitted to the transmission part 21 through the transmission head 312, and the transmission head 312 always provides power to the transmission part 21 during the entire rotation of the transmission block 31, causing the transmission rod 2 to slide back and forth in the straight groove, thereby increasing the output torque of the transmission rod 2. This is beneficial for providing sufficient clamping force for the engagement of the locking point and the locking seat, reducing the likelihood of the window sash shaking after closing.

[0025] The two transmission parts 21 on the transmission rod 2 can be formed by stamping. Specifically, the transmission rod 2 has two first clearance holes 22 along the front-back direction. The transmission rod 2 is connected to transmission plates on the side of the two first clearance holes 22 that are close to each other. The two transmission plates are bent upwards to form two transmission parts 21. During the production of the transmission rod 2, the two transmission plates are respectively placed in the two first clearance holes 22, and then the two transmission plates are stamped and bent so that the two transmission plates protrude from the two first clearance holes 22. This allows the two transmission parts 21 to be directly formed on the transmission rod 2. The design of the first clearance holes 22 can reduce the weight of the transmission rod 2. When assembled and used, the transmission head 312 extends between the ends of the two transmission plates. By applying a pushing force to the end of either of the two transmission parts 21, the transmission rod 2 is driven to slide.

[0026] To improve the stability of the transmission head 312 and the transmission part 21 during transmission, in this embodiment, a limiting block 32 is formed on the outer side of the transmission block 31 at a position corresponding to at least one of the first clearance holes 22. The limiting block 32 extends into the first clearance hole 22 directly opposite to it. By extending the limiting block 32 into the first clearance hole 22, the forward and backward position of the transmission rod 2 can be limited, which helps to keep the transmission head 312 within the two transmission parts 21, thereby ensuring that the transmission block 31 can stably drive the transmission rod 2 to slide when rotating.

[0027] When transmitting power, the transmission rod 2 is prone to deformation after prolonged use. To enhance its structural stability, in this embodiment, the front and rear sides of the transmission rod 2 are bent downwards to form side wings 23. The two side wings 23 abut against the bottom of the straight groove, and the limiting block 32 extends downwards into the area between the two side wings 23. The downward bending of the front and rear sides of the transmission rod 2 enhances its bending resistance and improves its structural stability when outputting power. Furthermore, the side wings 23 on the front and rear sides of the transmission rod 2 raise its height, creating an area between the transmission rod 2 and the bottom of the straight groove that can accommodate the limiting block 32. Extending the limiting block 32 downwards into this area helps keep it within the first clearance hole 22 throughout the entire rotation process, further improving the stability of power transmission between the transmission head 312 and the transmission part 21.

[0028] In order to maintain the position of the transmission block 31 after rotation, such as Figure 5As shown, in this embodiment, a stop block 4 is movably connected to the bottom of the straight groove. A first stop surface 41 and a second stop surface 42 are formed on the top side of the stop block 4. The first stop surface 41 and the second stop surface 42 extend upward in a direction that approaches each other. An elastic member 43 is provided between the stop block 4 and the bottom of the straight groove. The elastic member 43 can lift the stop block 4 upward until the end corner of the bottom of the limiting block 32 abuts against the first stop surface 41 or the second stop surface 42. When the transmission block 31 rotates to drive the transmission rod 2 to engage the locking point and the locking seat, it typically rotates to the left or right to the end of its stroke to maintain the locking or unlocking function. When the transmission block 31 rotates to the end of its stroke at either end, the elastic force of the elastic element 43 pushes the stop block 4 upward to the bottom of the limit block 32. At this time, the first stop surface 41 or the second stop surface 42 abuts against the end corner of the bottom of the limit block 32, thus ensuring the position of the transmission block 31 and further maintaining the output rod's outward output of power to the locking point and lock. The seat position improves the stability of the locking device during use. When the transmission block 31 is rotated again, the end corner on one side of the bottom of the limiting block 32 uses the inclined guide of the first stop surface 41 or the second stop surface 42 to press down the stop block 4, so that the elastic element 43 is elastically compressed. After the end corner on one side of the bottom of the limiting block 32 passes the highest point of the first stop surface 41 or the second stop surface 42, it rotates to the end of another stroke. At this time, the elastic restoring force of the elastic element 43 can press the second stop surface 42 or the first stop surface 41 against the end corner on the other side of the bottom of the limiting block 32.

[0029] There can be only one stop block 4. In this case, only the first stop surface 41 or the second stop surface 42 can be used to press against the limiting block 32 for limiting. However, in actual applications, there are multiple usage states when the handle is used, such as rotating upward to a vertical state, rotating downward to a horizontal state, or rotating downward to a vertical state. In this case, there are also three ways to limit the transmission block 31. Therefore, in this embodiment, there are two stop blocks 4 arranged in the left and right directions. The limiting block 32 can be rotated so that its bottom right corner abuts against the leftmost first stop surface 41, or its bottom surface abuts against the first stop surface 41 and the second stop surface 42 that are close to each other, or its bottom surface abuts against the rightmost second stop surface 42. When the transmission block 31 rotates, it can form three strokes according to the needs of use. Specifically, when the transmission block 31 rotates to the left to the end of its stroke, the elastic force of the elastic element 43 pushes the stop block 4 upward to the bottom of the limit block 32. At this time, the first stop surface 41 abuts against the bottom right corner of the limit block 32, thus maintaining the position of the transmission block 31 at the end of its stroke. When the transmission block 31 rotates to the right, the bottom right corner of the limit block 32 is guided by the inclined first stop surface 41 to press the stop block 4 downward, causing the elastic element 43 to be elastically compressed. After the bottom right corner of the limit block 32 passes the highest point of the first stop surface 41, it falls between the two stop blocks 4. At this time, the bottom surface of the limit block 32 abuts against the second stop surface of the left stop block 4. 42 and the first stop surface 41 of the right stop block 4, so that the transmission block 31 can be kept rotating to the middle position of the stroke; when the transmission block 31 continues to rotate to the right to the end of the stroke, the bottom left corner of the limit block 32 uses the tilting guide of the first stop surface 41 of the right stop block 4 to press down the right stop block 4, so that the elastic element 43 is elastically compressed. After the bottom left corner of the limit block 32 passes the highest point of the first stop surface 41, the elastic restoring force of the elastic element 43 can press the second stop surface 42 against the bottom left corner of the limit block 32, thereby keeping the transmission block 31 rotating to the right to the end of the stroke. This can provide a feel after the stroke is in place when the transmission block 31 rotates, and better maintain the stability of the transmission block 31 after it is in place.

[0030] Furthermore, the two stop blocks 4 are rotatably connected to the bottom of the straight groove at their respective near-to-each end corners, and the two elastic members 43 are respectively connected to the two stop blocks 4 at their respective far-to-each end corners. When the elastic member 43 provides an upward lifting force to the stop block 4, the stop block 4 can rotate upward to abut against the limiting block 32. When the limiting block 32 presses down against the stop block 4, the stop block 4 rotates downward to avoid the movement of the limiting block 32. When the limiting block 32 rotates between the two stop blocks 4, the two elastic members 43 provide upward elastic force at their respective far-to-each end corners, causing the two stop blocks 4 to rotate towards each other, thereby better limiting and maintaining the limiting block 32 between the two stop blocks 4.

[0031] The elastic element 43 can be a spring, but in this embodiment, the elastic element 43 is a torsion spring. The torsion spring provides an upward elastic support force to the stop block 4, which better cooperates to rotate the stop block 4 closer to or away from the limiting block 32.

[0032] In some embodiments, end caps 24 are connected to both ends of the transmission rod 2. The end caps 24 can cover the ends of the transmission rod 2, reducing the area exposed between the transmission rod 2 and the straight groove, thereby reducing the entry of foreign objects that may affect the sliding of the transmission rod 2.

[0033] The transmission rod 2 can be provided with another of the slide rails or slide grooves, and the fixed groove plate 1 can be provided with another. Through the cooperation of the slide rails and slide grooves, the transmission rod 2 can be slidably connected in the fixed groove plate 1. In this embodiment, the transmission rod 2 is slidably connected in the fixed groove plate 1 by providing a structure on the fixed groove plate 1 to prevent the transmission rod 2 from coming out. Specifically, the present invention also includes a limiting plate 5 located between the lock box 3 and the fixed groove plate 1. The transmission rod 2 is provided with a second clearance hole 25 extending in the left and right direction. The limiting plate 5 is provided with a third clearance hole 51. A first connecting member and a second connecting member are provided through the bottom side of the fixed groove plate 1. The first connecting member passes through the second clearance hole 25 and is connected to the limiting plate 5. The second connecting member passes through the second clearance hole 25 and the third clearance hole 51 and is connected to the lock box 3. The limiting plate 5 is fixed to the top side of the fixed groove plate 1 using the first connecting member. At this time, the limiting plate 5 can limit the position of the transmission rod 2 within the fixed groove plate 1, preventing the fixed groove plate 1 from coming out and realizing the sliding connection of the transmission rod 2 within the fixed groove plate 1. The lock box 3 is connected to the lock box 3 by the second connecting member passing through the second clearance hole 25 on the transmission rod 2 and the third clearance hole 51 on the limiting plate 5, thereby fixing the lock box 3 relatively to the fixed groove plate 1.

[0034] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A drive lock, characterized by: include: A fixed groove plate (1) extends in the left and right direction, and the fixed groove plate (1) is surrounded to form a straight groove with the groove opening facing upward; The transmission rod (2) is slidably connected in the straight groove. Two first clearance holes (22) are provided on the transmission rod (2) along the front-back direction. The transmission rod (2) is connected to the transmission plate on the side of the two first clearance holes (22) that are close to each other. The two transmission plates are bent upward and form two transmission parts (21). The transmission part (21) is integrally formed on the top side of the transmission rod (2). Two transmission parts (21) are spaced apart on the top side of the transmission rod (2) along the left-right direction. A lock box (3) is disposed on the top side of the fixed groove plate (1). A transmission block (31) is rotatably connected inside the lock box (3). A connecting rod (311) is formed on the outside of the transmission block (31). One end of the connecting rod (311) extends between the two transmission parts (21) and forms a transmission head (312). The transmission head (312) is located between the two transmission parts (21). A limiting block (32) is formed on the outer side of the transmission block (31) at a position corresponding to at least one of the first clearance holes (22), and the limiting block (32) extends into the first clearance hole (22) directly opposite it; The bottom of the straight groove is movably connected to two stop blocks (4). The two stop blocks (4) are arranged in the left and right direction. The top side of the stop block (4) is formed with a first stop surface (41) and a second stop surface (42). The first stop surface (41) and the second stop surface (42) extend upward in a direction that approaches each other. An elastic element (43) is provided between the stop block (4) and the bottom of the straight groove. The limiting block (32) can be rotated so that its bottom right corner abuts against the leftmost first stop surface (41), or its bottom surface abuts against the first stop surface (41) and the second stop surface (42) that are close to each other, or its bottom surface abuts against the rightmost second stop surface (42).

2. The transmission locking device according to claim 1, characterized in that: The transmission rod (2) is bent downward on both the front and rear sides to form side wings (23), and the two side wings (23) abut against the bottom of the straight groove. The limiting block (32) extends downward into the area between the two side wings (23).

3. A transmission locking device according to claim 2, characterized in that: A stop block (4) is movably connected to the bottom of the straight groove. A first stop surface (41) and a second stop surface (42) are formed on the top side of the stop block (4). The first stop surface (41) and the second stop surface (42) extend upward in a direction that approaches each other. An elastic member (43) is provided between the stop block (4) and the bottom of the straight groove. The elastic member (43) can lift the stop block (4) upward until the end corner of the bottom of the limiting block (32) abuts against the first stop surface (41) or the second stop surface (42).

4. A transmission locking device according to claim 1, characterized in that: The elastic element (43) is a torsion spring.

5. A transmission locking device according to claim 2, characterized in that: The two ends of the transmission rod (2) are respectively connected to end caps (24).

6. A transmission locking device according to claim 1, characterized in that: It also includes a limiting plate (5) located between the lock box (3) and the fixed groove plate (1). The transmission rod (2) is provided with a second clearance hole (25) extending in the left and right direction. The limiting plate (5) is provided with a third clearance hole (51). The bottom side of the fixed groove plate (1) is provided with a first connector and a second connector. The first connector passes through the second clearance hole (25) and is connected to the limiting plate (5). The second connector passes through the second clearance hole (25) and the third clearance hole (51) and is connected to the lock box (3).

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