Transmission locking device

Abstract

The invention relates to the technical field of locksets, and discloses a transmission locking device which comprises a fixed groove plate, a locking mechanism, a locking mechanism, a locking mechanism, a locking mechanism and a locking mechanism, the fixed groove plate extends in the left-right direction, and a straight groove with an upward groove opening is defined by the fixed groove plate; the transmission rods are slidably connected into the straight grooves, transmission parts are integrally formed on the top sides of the transmission rods, and at least two transmission parts are arranged on the top sides of the transmission parts in the left-right direction at intervals; the lock box is arranged on the top side of the fixed groove plate, a transmission block is rotationally connected into the lock box, a connecting rod is formed on the outer side of the transmission block, one end of the connecting rod extends to the position between the two transmission parts and forms a transmission head, and the transmission head is located between the two transmission parts. Sufficient pressing force can be provided for cooperation of the lock point and the lock seat, and the situation that a window sash is prone to shaking after being closed is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of locks, and in particular to a transmission locker. Background Art

[0002] Transmission locks are used to transmit power when a door or window handle is turned. To use, the handle's square shaft is inserted into the transmission lock's gear. Turning the handle transmits power to a transmission rod through the meshing of the gear and rack, which in turn drives the locking point on the transmission rod to lock or unlock. This gear-based power transmission method is structurally simple and has a low transmittable torque, typically no more than 20 Newtons, making it difficult to ensure a strong clamping force between the locking point and the lock base. Therefore, there is an urgent need for a transmission lock capable of transmitting higher torque. Summary of the Invention

[0003] The object of the present invention is to provide a transmission lock to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] The solution of the present invention to solve its technical problems is: A transmission lock comprises: a fixed slot plate extending in the left-right direction, the fixed slot plate being surrounded by a straight slot with a notch facing upward; a transmission rod slidably connected in the straight slot, a transmission part being integrally formed on the top side of the transmission rod, and at least two transmission parts being spaced apart on the top side along the left-right direction; a lock box being arranged on the top side of the fixed slot plate, a transmission block being rotatably connected in the lock box, a connecting rod being formed on the outside of the transmission block, one end of the connecting rod extending between the two transmission parts and forming a transmission head, and the transmission head being located between the two transmission parts.

[0005] This technical solution has at least the following beneficial effects: during installation, the fixed groove plate is installed in the sash frame, and then the handle is installed. The square shaft on the handle passes through the preset opening on the transmission block and is connected to the transmission block. During use, when the window sash needs to be locked or opened, the handle is turned to drive the transmission block to rotate through the square shaft. At this time, the connecting rod on the outside of the transmission block rotates around the transmission block, and the transmission head at the end of the connecting rod is used to push 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, and the production efficiency of the transmission rod is improved. 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 process of the transmission block, so that the transmission rod slides back and forth in the straight groove, thereby increasing the torque output by the transmission rod, which is beneficial to provide sufficient clamping force for the cooperation between the locking point and the lock 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, two first avoidance holes are provided on the transmission rod along the front-to-back direction. A transmission plate is connected to each side of the transmission rod adjacent to the two first avoidance holes. The two transmission plates are bent upward to form the two transmission parts. During production of the transmission rod, the two transmission plates are respectively placed in the two first avoidance holes. The two transmission plates are then stamped and bent so that the bent transmission plates protrude out of the two first avoidance holes, thereby directly forming the two transmission parts on the transmission rod. The design of the first avoidance holes can also reduce 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 thrust 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 limit block is formed on the outside of the transmission block at a position corresponding to at least one of the first avoidance holes, and the limit block extends into the first avoidance hole directly opposite the limit block. The limit block extending into the first avoidance hole can limit the front and rear position of the transmission rod, 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 during rotation.

[0008] As a further improvement to the above technical solution, the front and rear sides of the transmission rod are respectively bent downward to form side wings, and the two side wings respectively abut against the bottom of the straight groove, and the limit block extends downward into the area between the two side wings. The downward bending of the front and rear sides of the transmission rod can enhance the bending resistance of the transmission rod and improve the structural stability of the transmission rod when outputting power outward. In addition, the front and rear side wings of the transmission rod can raise the height of the transmission rod, so that an area that can accommodate the limit block is formed between the transmission rod and the bottom of the straight groove. At this time, extending the limit block downward into this area is conducive to keeping the limit block always located in the first avoidance hole during the entire rotation process, further improving the stability of power transmission between the transmission head and the transmission part.

[0009] As a further improvement of the above technical solution, the bottom of the straight groove is movably connected with a stop block, and the top side of the stop block is formed with a first stop surface and a second stop surface, and the first stop surface and the second stop surface respectively extend upward in a direction approaching each other, and an elastic member is provided between the stop block and the bottom of the straight groove, and the elastic member can lift the stop block upward to the end angle of the bottom of the limit block against the first stop surface or the second stop surface. When the transmission block is rotated to drive the transmission rod to realize the cooperation between the locking point and the lock seat, it is usually rotated to the left or right to the end of the stroke to maintain the locking or opening function. When the transmission block rotates to the end of the stroke at either end, the elastic force of the elastic member is used to push the stop block upward to the bottom of the limit block. At this time, the first stop surface or the second stop surface is against the end angle position of the bottom of the limit block, which can ensure the position state of the transmission block, thereby further maintaining the state of the output rod outputting power outward to the locking point and the lock seat, thereby improving the stability of the lock when in use. When the transmission block is rotated again, the end angle on one side of the bottom of the limit block is pressed down by the inclined guidance of the first stop surface or the second stop surface, so that the elastic member is elastically compressed, and after the end angle 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 other end of the stroke. At this time, the elastic restoring force of the elastic member can press the second stop surface or the first stop surface to the end angle on the other side of the bottom of the limit block.

[0010] As a further improvement of the above technical solution, two stop blocks are provided along the left and right directions, and the limit block can be rotated until its bottom right corner abuts against the first stop surface located on the far left, or its bottom surface abuts against the first stop surface and the second stop surface that are close to each other, or its bottom surface abuts against the second stop surface on the far right. When the transmission block is rotated for use, it can form three strokes according to the needs of use. Specifically, when the transmission block rotates to the left to the end of the stroke, the elastic force of the elastic member is used to lift the stop block upward to the bottom of the limit block. At this time, the first stop surface abuts against the bottom right corner of the limit block, so that the position state of the transmission block rotated to the left to the end of the stroke can be maintained; when the transmission block rotates to the right, the bottom right corner of the limit block is pressed down by the inclined guidance of the first stop surface, so that the elastic member is elastically compressed, and after the bottom right corner of the limit 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 limit 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 be rotated to the right to the end of the stroke, the left end corner of the bottom of the limit block uses the inclined guidance of the first stop surface of the right stop block to press the right stop block downward, so that the elastic part is elastically compressed, and after the left end corner of the bottom of the limit block passes the highest point of the first stop surface, the elastic restoring force of the elastic part can press the second stop surface to the left end corner of the bottom of the limit block, thereby keeping the transmission block rotated to the right to the position of the end of the stroke, which can provide the transmission block with a feel after the stroke is in place when it rotates, and better maintain the stability of the transmission block after it is rotated into place.

[0011] As a further improvement to the above technical solution, the two end corners of the bottom of the two stop blocks that are close to each other are respectively rotatably connected to the bottom of the straight groove, and the two elastic members are respectively connected to the end corners of the bottom of the two stop blocks that are away from each other. When the elastic member provides an upward lifting force to the stop block, the stop block can rotate upward until it contacts the limit block. When the limit block presses downward against the stop block, the stop block rotates downward to avoid the movement of the limit block. When the limit block rotates to between the two stop blocks, the two elastic members provide upward elastic forces at the positions of the bottom of the two stop blocks that are away from each other, causing the two stop blocks to rotate in a direction toward each other, thereby better limiting and maintaining the limit block between the two stop blocks.

[0012] As a further improvement of the above technical solution, the elastic member is a torsion spring, which provides an upward elastic supporting force to the stop block, so as to better cooperate with the stop block to rotate closer to or away from the limit block.

[0013] As a further improvement to the above technical solution, end caps are connected to both ends of the transmission rod, which can shield the ends of the transmission rod, reduce the exposure of the area between the transmission rod and the straight groove, and thus reduce the entry of foreign objects that affect the sliding of the transmission rod.

[0014] As a further improvement of the above technical solution, the present invention also includes a limit plate located between the lock box and the fixed slot plate, the transmission rod is provided with a second avoidance hole extending in the left-right direction, the limit plate is provided with a third avoidance hole, and the bottom side of the fixed slot plate is upwardly penetrated with a first connecting member and a second connecting member, the first connecting member passes through the second avoidance hole and is connected to the limit plate, and the second connecting member passes through the second avoidance hole and the third avoidance hole and is connected to the lock box. The limit plate is fixed to the top side of the fixed slot plate by the first connecting member. At this time, the limit plate can limit the position of the transmission rod in the fixed slot plate, preventing the fixed slot plate from falling out, thereby realizing the sliding connection of the transmission rod in the fixed slot plate, and the lock box is connected to the lock box by the second connecting member passing through the second avoidance hole on the transmission rod and the third avoidance hole on the limit plate, thereby fixing the lock box relatively to the fixed slot plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for describing the embodiments. Obviously, the drawings described only illustrate some embodiments of the present invention, not all of them. Those skilled in the art can derive other design solutions and drawings based on these drawings without inventive effort.

[0016] Figure 1 It is an overall three-dimensional diagram of the present invention.

[0017] Figure 2 It is a three-dimensional view of a transmission rod of the present invention.

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

[0019] Figure 4 yes Figure 3 AA cross-sectional structure diagram.

[0020] Figure 5 yes Figure 3 Schematic diagram of the BB cross-section structure.

[0021] In the accompanying drawings: 1-fixed slot plate, 2-transmission rod, 21-transmission part, 22-first avoidance hole, 23-side wing, 24-end cover, 25-second avoidance hole, 3-lock box, 31-transmission block, 311-connecting rod, 312-transmission head, 32-limiting block, 4-stop block, 41-first stop surface, 42-second stop surface, 43-elastic part, 5-limiting plate, 51-third avoidance hole. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, all the connection relationships mentioned in the text do not refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connecting accessories according to the specific implementation situation. The various technical features in the invention can be combined interactively without conflicting with each other.

[0023] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 4 A transmission lock comprises: a fixed slot plate 1, which extends in the left and right directions, and the fixed slot plate 1 is surrounded by a straight slot with a notch facing upward; a transmission rod 2, which is slidably connected in the straight slot, and a transmission part 21 is integrally formed on the top side of the transmission rod 2, and at least two transmission parts 21 are arranged at intervals on the top side along the left and right directions; a lock box 3, which is arranged on the top side of the fixed slot plate 1, and a transmission block 31 is rotatably connected in the lock box 3, and a connecting rod 311 is formed on the outside of the transmission block 31, and one end of the connecting rod 311 extends between the two transmission parts 21 and forms a transmission head 312, and the transmission head 312 is located between the two transmission parts 21.

[0024] In this transmission lock, when installing, the fixed groove plate 1 is installed in the sash frame, and then the handle is installed. The square shaft on the handle passes through the preset opening on the transmission block 31 and is connected to the transmission block 31. When in use, when the window sash needs to be locked or opened, the handle is turned to drive 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 integrated The transmission head 312 is formed on the top side of the transmission rod 2, which saves the process of docking and assembling the transmission part 21 on the transmission rod 2, and improves 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 process of the transmission block 31, so that the transmission rod 2 slides back and forth in the straight groove, thereby increasing the torque output by the transmission rod 2, which is beneficial to provide sufficient clamping force for the cooperation between the locking point and the lock seat, and reducing the situation where the window sash is easy to shake after closing.

[0025] The two transmission parts 21 on the transmission rod 2 can be formed by stamping. Specifically, two first avoidance holes 22 are provided on the transmission rod 2 along the front-to-back direction. The transmission rod 2 is connected to a transmission plate on the side where the two first avoidance holes 22 are close to each other. The two transmission plates are bent upward to form the two transmission parts 21. When producing the transmission rod 2, the two transmission plates are respectively placed in the two first avoidance holes 22, and then the two transmission plates are stamped and bent so that the two transmission plates are bent and protrude from the two first avoidance holes 22, thereby directly forming the two transmission parts 21 on the transmission rod 2. The design of the first avoidance 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, and applies a thrust to the end of either of the two transmission parts 21, thereby driving the transmission rod 2 to slide.

[0026] To enhance the stability of the transmission between the transmission head 312 and the transmission portion 21, 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 avoidance holes 22. The limiting block 32 extends into the first avoidance hole 22 facing the limiting block 32. The limiting block 32 extending into the first avoidance hole 22 limits the front-to-back position of the transmission rod 2, facilitating the maintenance of the transmission head 312 within the two transmission portions 21, thereby ensuring that the transmission block 31 can stably drive the transmission rod 2 to slide during rotation.

[0027] The transmission rod 2 is prone to deformation after prolonged use during power transmission. To enhance its structural stability, in this embodiment, the front and rear sides of the transmission rod 2 are respectively bent downward to form side wings 23. The two side wings 23 respectively abut against the bottom of the straight groove, and the limit block 32 extends downward into the area between the two side wings 23. The downward bending of the front and rear sides of the transmission rod 2 can enhance the bending resistance of the transmission rod 2 and improve the structural stability of the transmission rod 2 when outputting power. In addition, the front and rear side wings 23 of the transmission rod 2 can raise the height of the transmission rod 2, so that an area is formed between the transmission rod 2 and the bottom of the straight groove to accommodate the limit block 32. At this time, extending the limit block 32 downward into this area is conducive to keeping the limit block 32 always located in the first avoidance hole 22 during 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, as shown in FIG. Figure 5As shown, in this embodiment, the bottom of the straight groove is movably connected with a stop block 4, and the top side of the stop block 4 is formed with a first stop surface 41 and a second stop surface 42, and the first stop surface 41 and the second stop surface 42 respectively extend upward in a direction approaching each other, and an elastic member 43 is provided between the stop block 4 and the bottom of the straight groove, and the elastic member 43 can lift the stop block 4 upward to the end angle of the bottom of the limit block 32 to abut 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 realize the engagement between the locking point and the lock seat, it is usually rotated to the left or right to the end of the stroke to maintain the locking or opening function. When the transmission block 31 rotates to the end of the stroke at either end, the elastic force of the elastic member 43 is used to lift 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 is against the end angle position of the bottom of the limit block 32, so that the position state of the transmission block 31 can be guaranteed, thereby further maintaining the output rod to output power outward to the locking point and the lock. The state of the seat improves the stability of the lock when in use. When the transmission block 31 is rotated again, the end angle on one side of the bottom of the limit block 32 uses the inclined guidance of the first stop surface 41 or the second stop surface 42 to press the stop block 4 downward, so that the elastic member 43 is elastically compressed. After the end angle on one side of the bottom of the limit block 32 passes the highest point of the first stop surface 41 or the second stop surface 42, it rotates to the other end of the stroke. At this time, the elastic restoring force of the elastic member 43 can press the second stop surface 42 or the first stop surface 41 to the end angle on the other side of the bottom of the limit 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 limit block 32 for limiting. 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. At this time, three limits are also required for the transmission block 31. Therefore, in this embodiment, two stop blocks 4 are provided along the left and right directions, and the limit block 32 can be rotated to the point where the right end corner of its bottom abuts against the first stop surface 41 located on the far left, or its bottom abuts against the first stop surface 41 and the second stop surface 42 close to each other, or its bottom abuts against the second stop surface 42 on the far right. When the transmission block 31 is rotated and used, it can form three strokes according to the needs of use. Specifically, when the transmission block 31 is rotated to the left to the end of the stroke, the elastic force of the elastic member 43 is used to lift the stop block 4 upward to the bottom of the limit block 32. At this time, the first stop surface 41 is against the right end corner of the bottom of the limit block 32, so that the transmission block 31 can be kept in the position state of rotating to the left to the end of the stroke; when the transmission block 31 is rotated to the right, the right end corner of the bottom of the limit block 32 is guided by the first stop surface 41 to press the stop block 4 downward, so that the elastic member 43 is elastically compressed, and the right end corner of the bottom of the limit block 32 passes the highest point of the first stop surface 41 and falls between the two stop blocks 4. At this time, the bottom surface of the limit block 32 is 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 of the stroke; when the transmission block 31 continues to be rotated to the right to the end of the stroke, the left end corner of the bottom of the limit block 32 uses the inclined guidance of the first stop surface 41 of the right stop block 4 to press the right stop block 4 downward, so that the elastic member 43 is elastically compressed, and after the left end corner of the bottom of the limit block 32 passes the highest point of the first stop surface 41, the elastic restoring force of the elastic member 43 can press the second stop surface 42 to the left end corner of the bottom of the limit block 32, thereby keeping the transmission block 31 rotated to the right to the end of the stroke, which can provide a feel of the travel being in place when the transmission block 31 is rotated, and better maintain the stability of the transmission block 31 after it is rotated into place.

[0030] Furthermore, the two end corners of the stop blocks 4 that are close to each other are respectively rotatably connected to the bottom of the straight groove, and the two elastic members 43 are respectively connected to the end corners of the two stop blocks 4 that are separated from each other. When the elastic member 43 provides an upward lifting force to the stop block 4, the stop block 4 can rotate upward until it contacts the limit block 32. When the limit block 32 presses downward against the stop block 4, the stop block 4 rotates downward to avoid the movement of the limit block 32. When the limit block 32 rotates to between the two stop blocks 4, the two elastic members 43 respectively provide upward elastic force at the positions of the two stop blocks 4 that are separated from each other, causing the two stop blocks 4 to rotate in a direction toward each other, thereby better limiting and maintaining the limit block 32 between the two stop blocks 4.

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

[0032] In some embodiments, the two ends of the transmission rod 2 are respectively connected to end caps 24. The end caps 24 can shield the ends of the transmission rod 2, reduce the exposure of the area between the transmission rod 2 and the straight groove, and thus reduce the entry of foreign objects and the influence of the sliding of the transmission rod 2.

[0033] The transmission rod 2 can be provided with another one of a slide rail or a slide groove, and the fixed slot plate 1 can be provided with another one. Through the mutual cooperation of the slide rail and the slide groove, the transmission rod 2 is slidably connected in the fixed slot plate 1. In this embodiment, a structure is provided on the fixed slot plate 1 to limit the transmission rod 2 from disengaging, so that the transmission rod 2 is slidably connected in the fixed slot plate 1. Specifically, the present invention also includes a limiting plate 5 located between the lock box 3 and the fixed slot plate 1, and the transmission rod 2 is provided with a second avoidance hole 25 extending in the left and right directions, and the limiting plate 5 is provided with a third avoidance hole 51. The bottom side of the fixed slot plate 1 is upwardly penetrated with a first connecting member and a second connecting member, the first connecting member passes through the second avoidance hole 25 and is connected to the limiting plate 5, and the second connecting member passes through the second avoidance hole 25 and the third avoidance hole 51 and is connected to the lock box 3. The limiting plate 5 is fixed to the top side of the fixed slot plate 1 by using the first connecting piece. At this time, the limiting plate 5 can limit the position of the transmission rod 2 within the fixed slot plate 1 to prevent the fixed slot plate 1 from falling outward, thereby realizing the sliding connection of the transmission rod 2 within the fixed slot plate 1, and the lock box 3 is connected to the lock box 3 after the second connecting piece passes through the second avoidance hole 25 on the transmission rod 2 and the third avoidance hole 51 on the limiting plate 5, thereby fixing the lock box 3 relatively to the fixed slot plate 1.

[0034] The above specifically describes the preferred embodiments of the present invention, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A transmission lock, characterized in that: include: A fixed slot plate (1) extending in the left-right direction, wherein the fixed slot plate (1) is surrounded by a straight slot with an upward notch; A transmission rod (2) is slidably connected in the straight groove, a transmission portion (21) is integrally formed on the top side of the transmission rod (2), and at least two transmission portions (21) are arranged at intervals along the left-right direction on the top side of the transmission portion (21); A lock box (3) is arranged on the top side of the fixed slot plate (1), and a transmission block (31) is rotatably connected in the lock box (3). A connecting rod (311) is formed on the outside of the transmission block (31), and one end of the connecting rod (311) extends between the two transmission parts (21) and forms a transmission head (312), and the transmission head (312) is located between the two transmission parts (21).

2. A transmission lock according to claim 1, characterized in that: Two first avoidance holes (22) are provided on the transmission rod (2) along the front-to-back direction. The transmission rod (2) is located on a side close to the two first avoidance holes (22) and is connected to transmission plates. The two transmission plates are bent upwards to form the two transmission parts (21).

3. The transmission lock according to claim 2, characterized in that: 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 avoidance holes (22), and the limiting block (32) extends into the first avoidance hole (22) facing the limiting block.

4. A transmission lock according to claim 3, characterized in that: The front and rear sides of the transmission rod (2) are respectively bent downward to form side wings (23), the two side wings (23) respectively abut against the bottom of the straight groove, and the limit block (32) extends downward into the area between the two side wings (23).

5. The transmission lock according to claim 4, characterized in that: The bottom of the straight groove is movably connected to a stop block (4), and a first stop surface (41) and a second stop surface (42) are formed on the top side of the stop block (4), and the first stop surface (41) and the second stop surface (42) respectively extend upward in a direction approaching each other, and an elastic member (43) is provided between the stop block (4) and the bottom of the straight groove, and the elastic member (43) can lift the stop block (4) upward to the end angle of the bottom of the limit block (32) against the first stop surface (41) or the second stop surface (42).

6. The transmission lock according to claim 5, characterized in that: Two stop blocks (4) are provided along the left and right directions, and the limit block (32) can be rotated until the right end corner of its bottom abuts against the first stop surface (41) located on the leftmost side, or its bottom abuts against the first stop surface (41) and the second stop surface (42) that are close to each other, or its bottom abuts against the second stop surface (42) on the rightmost side.

7. The transmission lock according to claim 6, characterized in that: The end corners of the bottoms of the two stop blocks (4) that are close to each other are respectively rotatably connected to the bottom of the straight groove, and the two elastic members (43) are respectively connected to the end corners of the bottoms of the two stop blocks (4) that are far away from each other.

8. The transmission lock according to claim 6, characterized in that: The elastic member (43) is a torsion spring.

9. The transmission lock according to claim 4, characterized in that: Both ends of the transmission rod (2) are respectively connected to end covers (24).

10. The transmission lock according to claim 1, characterized in that: The invention also includes a limiting plate (5) located between the lock box (3) and the fixed slot plate (1), a second avoidance hole (25) extending in the left-right direction is provided on the transmission rod (2), a third avoidance hole (51) is provided on the limiting plate (5), and a first connecting member and a second connecting member are passed through the bottom side of the fixed slot plate (1) upward, the first connecting member passes through the second avoidance hole (25) and is connected to the limiting plate (5), and the second connecting member passes through the second avoidance hole (25) and the third avoidance hole (51) and is connected to the lock box (3).

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