Transmission box with limiting structure

Abstract

A transmission box with a limiting structure comprises a transmission box body, a transmission assembly used for being connected with a lock rod and a shifting rod used for being connected with a handle and driving the transmission assembly to move, a limiting groove is formed in the transmission box body, and the limiting groove comprises a sliding part used for a shifting needle to freely slide and a locking part used for locking the shifting needle to prevent the transmission assembly from sliding. When the pulling needle is located at the locking part, the weight of the transmission assembly, the lock rod and the like can apply force to the locking part of the limiting groove through the pulling needle to prevent the transmission assembly from automatically sliding, the transmission assembly can be driven to slide only by rotating the pulling rod through the handle, and the situation that doors and windows are automatically unlocked or the lock rod and the lock seat are not aligned is avoided; according to the limiting switch, no extra component is needed for locking, the same effect as that of a limiting switch on the market can be achieved through a simple structure, accessories can be reduced, the cost is reduced, the market competitiveness is improved, and the damage rate in the production, transportation and installation processes is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of door and window lock boxes, in particular to a transmission box with a limiting structure. Background Art

[0002] Door and window locks are essential components for modern home users. Their main purpose is to effectively prevent children from falling from buildings and thieves from entering. Door and window locks generally use a transmission box to drive the locking rod to achieve locking. Existing door and window locks are mostly set on the closed side. The door and window are locked by turning the handle to drive the locking rod on the transmission box to lock on the door and window frame. In order to make the handle turn more smoothly, conventional transmission boxes are designed to drive the locking rod through the square shaft on the handle or the buckles on the transmission rods on both sides.

[0003] For example, a lock transmission box for doors and windows disclosed in Chinese patent CN202020317820.4 includes: a housing; a transmission gear, which is arranged in the housing, and the front and rear sides of the transmission gear are respectively meshed with a first transmission rack and a second transmission rack, and the first transmission rack and the second transmission rack can slide left and right along the housing; a support block, which is fixed in the housing, and is provided with a rotating shaft, which extends forward and backward and is provided with a lock core mounting hole; a detent pin, which is connected to the outer peripheral surface of the lower side of the rotating shaft; a shift fork, which is U-shaped with an opening upward, and is fixed to the first transmission rack or the second transmission rack, and the shift fork and the detent pin cooperate with each other. The shift fork and the detent pin of the above-mentioned structure connecting handle cooperate with each other to drive the lifting plate to move up and down to achieve locking and unlocking of the doors and windows. Since there is no limiting mechanism inside, when the doors and windows are large, the lifting plate required will be longer and heavier. At this time, the lifting plate is prone to reverse movement due to its own gravity, resulting in automatic unlocking or misalignment between the lifting plate and the lock seat, affecting the closing of the doors and windows.

[0004] In order to solve the above problems, a limit switch is currently installed on the linkage mechanism to prevent the lifting plate from moving on its own, such as Chinese patent CN201210111535.7 The disclosed sliding door and window lock with anti-theft function includes a lock body and a touch iron with a lock buckle, and the lock body and the touch iron are respectively installed on the sliding door and window frames that collide and contact with each other (four-sliding doors and windows can also be installed), wherein the lock body includes a lock shell, a lock side plate and a push-pull switch; further, the lock body also includes a self-locking anti-theft component, which is arranged inside the lock shell of the lock body; in the above structure, when in use, after closing the door and window, it is necessary to manually open the self-locking anti-theft component to lock the internal transmission member to prevent the lock body from moving on its own or being pried by external force; similarly, when it is necessary to open the door and window, it is necessary to manually close the self-locking anti-theft component first to unlock the internal transmission member before the door and window can be opened. This step is quite cumbersome, and this design will make the internal structure of the transmission box more complicated and increase the manufacturing cost. In addition, during the production, transportation and installation process, the window sash and the outer frame will be deformed to a certain extent, and there will be a certain probability that the window sash and the outer frame will be misaligned, resulting in incorrect installation of the limit lock and malfunction. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a transmission box with a limiting structure.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] The locking mechanism is configured to lock the locking cam of the driving mechanism and the locking cam of the driving mechanism, wherein the locking cam is secured to the locking cam of the driving mechanism and is secured to the locking cam of the driving mechanism.

[0008] Furthermore, the limiting groove is a U-shaped groove, the two ends of the U-shaped groove are locking parts, the middle of the U-shaped groove is a sliding part, and the sliding direction of the setting pin in the second strip hole is the same as the direction of the setting pin moving back and forth between the locking part and the sliding part.

[0009] In the present invention, the transmission assembly includes a first transmission rod for connecting the shift rod and a second transmission rod installed opposite to the first transmission rod. A linkage mechanism is also provided between the first transmission rod and the second transmission rod for enabling the first transmission rod and the second transmission rod to move relative to each other.

[0010] Furthermore, the linkage mechanism includes a first rack arranged on the first transmission rod and a second rack arranged on the second transmission rod. The first rack and the second rack are arranged opposite to each other, and the first rack and the second rack are meshed and connected by a gear set. When the first transmission rod slides, the second transmission rod is driven to slide relative to it through the gear set.

[0011] Furthermore, the gear set includes at least one gear, and the gear is rotatably mounted on the transmission box body.

[0012] Furthermore, the transmission box body is provided with a sealing cover for sealing the box body.

[0013] The utility model has the following advantages and beneficial effects: a limit groove is provided inside the transmission box body, the limit groove includes a sliding part for the free sliding of the dial pin and a locking part for locking the dial pin to prevent the transmission assembly from sliding; when the dial pin is located at the locking part, the weight of the transmission assembly and the locking rod will apply force to the locking part of the limit groove through the dial pin to prevent the transmission assembly from sliding on its own, and the transmission assembly can only be driven to slide by rotating the dial rod by the handle, avoiding the situation that the doors and windows are automatically unlocked or the lock rod and the lock seat are not aligned; there is no need to add additional components for locking, and the same effect as the upper limit switch on the market can be achieved through a simple structure, which can reduce accessories, reduce costs, improve market competitiveness, and reduce the damage rate during production, transportation and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described below with reference to the accompanying drawings and embodiments:

[0015] Figure 1 Schematic diagram of the transmission box in Example 1;

[0016] Figure 2 This is a diagram of the internal structure of the transmission box in Example 1;

[0017] Figure 3 This is a disassembled diagram of the transmission box in Example 1;

[0018] Figure 4 Schematic diagram of the limiting groove in this embodiment 1;

[0019] Figure 5 This is a linkage diagram when the lever is rotated to the right in this embodiment 1;

[0020] Figure 6This is a linkage diagram when the lever is rotated to the left in Example 1;

[0021] Figure 7 Schematic diagram of the transmission box in Example 2;

[0022] Figure 8 This is a disassembled diagram of the transmission box in this embodiment 2. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention, but the present invention is not limited to the following embodiments. Example 1

[0024] like Figures 1 to 6 As shown, this embodiment discloses a transmission box with a limiting structure, including a transmission box body 1, a transmission assembly 3 for connecting a locking rod, and a lever 4 for connecting a handle and driving the transmission assembly 3 to move, the shell cover 2 is fixed to the transmission box body 1 by screws, the locking rod is used to lock the door and window on the door and window frame, the transmission box body 1 is provided with a mounting groove 11 for installing the transmission assembly 3 and a mounting hole 12 for installing the lever 4, the transmission assembly 3 is slidably installed on the mounting groove 11, and one end of the lever 4 is rotatably installed in the mounting hole 12, and a limiting mechanism 5 is provided between the lever 4 and the transmission assembly 3 to prevent the transmission assembly 3 from sliding on its own, the limiting mechanism 5 includes a first strip hole 51 provided at the other end of the lever 4, a second strip hole 51 provided on the transmission assembly 3 The strip hole 52, the limiting groove 53 provided on the transmission box body 1 and the setting pin 54 vertically provided in the limiting groove 53, the major axis direction of the first strip hole 51 is the same as the radial direction of the dial rod 4, one end of the setting pin 54 slides along the limiting groove 53, and the other end of the setting pin 54 slides through the first strip hole 51 and the second strip hole 52, the limiting groove 53 includes a sliding portion 531 for the setting pin 54 to slide freely and a locking portion 532 for locking the setting pin 54 to prevent the transmission assembly 3 from sliding, the dial rod 4 drives the setting pin 54 to slide in the limiting groove 53 through the first strip hole 51, the first strip hole 51 drives the setting pin 54 to move back and forth between the locking portion 532 and the sliding portion 531 through the bevel force, and the setting pin 54 drives the transmission assembly 3 to slide through the second strip hole 52.

[0025] When the pull pin is located at the locking portion 532, the weight of the transmission assembly 3 and the locking rod will apply vertical pressure to the locking portion 532 of the limiting groove 53 through the pull pin 54. Since the locking portion 532 and the sliding portion 531 are perpendicular to each other, the pull pin 54 will be restricted in the locking portion 532, preventing the transmission assembly 3 from sliding on its own, thereby avoiding the automatic unlocking of the door and window or the misalignment of the locking rod and the lock seat. By turning the handle, the pull rod 4 can be driven to rotate, and the pull rod 4 provides an oblique force to make the pull pin 54 slide out of the locking portion 532, thereby driving the pull pin 54 to disengage from the locking portion 532 and enter the sliding portion 531 so that the transmission assembly 3 can slide freely.

[0026] The locking portion 532 and the sliding portion 531 are perpendicular to each other. Preferably, the sliding direction of the dial pin 54 in the second bar hole 52 is the same as the direction of the dial pin 54 moving back and forth between the locking portion 532 and the sliding portion 531, so that the dial pin 54 can move back and forth between the sliding portion 531 and the locking portion 532 more smoothly. When the dial pin 54 moves upward relative to the second bar hole 52, the dial pin 54 disengages from the locking portion 532 and enters the sliding portion 531, and vice versa, enters the locking portion 532. The same effect as the upper limit switch on the market can be achieved through a simple structure, which can reduce accessories, reduce costs, and improve market competitiveness.

[0027] In this embodiment, the transmission assembly 3 includes a first transmission rod 31 for connecting the shift rod 4 and a second transmission rod 32 installed opposite to the first transmission rod 31. The first transmission rod 31 is provided with a sliding groove 311 for sliding the shift rod 4. The second strip-shaped hole 52 is located in the sliding groove 311. The shift rod 4 drives the first transmission rod 31 to slide through the sliding groove 311. A linkage mechanism 33 is also provided between the first transmission rod 31 and the second transmission rod 32 for making the first transmission rod 31 and the second transmission rod 32 move relative to each other.

[0028] Furthermore, the linkage mechanism 33 includes a first rack 331 arranged on the first transmission rod 31 and a second rack 332 arranged on the second transmission rod 32. The first rack 331 and the second rack 332 are arranged opposite to each other, and the first rack 331 and the second rack 332 are meshed and connected by a gear set 333. When the first transmission rod 31 slides, the second transmission rod 32 is driven to slide relative to it through the gear set 333.

[0029] Furthermore, the gear set 333 includes at least one gear. Preferably, in order to make the force more balanced, this embodiment uses two gears meshed between the first rack 331 and the second rack 332, and the two gears are rotatably mounted on the transmission box body 1.

[0030] Furthermore, the transmission box body 1 is provided with a sealing cover 2 for sealing the box body. Example 2

[0031] Figures 7 and 8 As shown, the structure of this embodiment is basically the same as that of embodiment 1, with the difference being that: in order to facilitate the installation of the handle, a mounting seat 13 is vertically provided on the transmission box body 1, and the mounting seat 13 is integrally formed with the transmission box body 1, and the limiting mechanism 2 is provided on the mounting seat 13, and a movable seat 312 for setting the second strip hole 52 is provided on the first transmission rod 31, and the second strip hole 52 is provided in cooperation with the limiting mechanism 2 through the movable seat 312. Similarly, the mounting hole 12 is provided on the mounting seat 13, and the shift rod 4 is rotatably installed in the mounting hole 12.

[0032] Furthermore, a fixing cover 14 for fixing the shift lever 4 and the limiting mechanism 2 is provided on the mounting seat 13 , and the fixing cover 14 is fixed to the mounting seat 13 by screws.

[0033] The above contents described in this specification are merely examples of the present invention. Those skilled in the art in the technical field to which the present invention belongs may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the contents of the present invention specification or exceed the scope defined by the claims, they shall fall within the scope of protection of the present invention.

Claims

1. A transmission box with a limiting structure, comprising a transmission box body (1), a transmission assembly (3) for connecting a locking rod, and a shifting rod (4) for connecting a handle and driving the transmission assembly (3) to move, wherein the transmission assembly (3) is slidably mounted in the transmission box body (1), and one end of the shifting rod (4) is rotatably mounted on the transmission box body (1), characterized in that: A limiting mechanism (5) is provided between the shifting rod (4) and the transmission assembly (3) for preventing the transmission assembly (3) from sliding on its own. The limiting mechanism (5) comprises a first strip hole (51) provided at the other end of the shifting rod (4), a second strip hole (52) provided on the transmission assembly (3), a limiting groove (53) provided in the transmission box body (1), and a shifting pin (54) vertically provided in the limiting groove (53). One end of the shifting pin (54) slides along the limiting groove (53), and the other end of the shifting pin (54) slides through the first strip hole (51) and the limiting groove (53). The second strip hole (52), the limiting groove (53) includes a sliding portion (531) for the setting needle (54) to slide freely and a locking portion (532) for locking the setting needle (54) to prevent the transmission assembly (3) from sliding, the setting rod (4) drives the setting needle (54) to slide in the limiting groove (53) through the first strip hole (51), the first strip hole (51) drives the setting needle (54) to move back and forth between the locking portion (532) and the sliding portion (531) through the bevel force, and the setting needle (54) drives the transmission assembly (3) to slide through the second strip hole (52).

2. The transmission box with a limiting structure according to claim 1, characterized in that: The limiting groove (53) is a U-shaped groove, the two ends of the U-shaped groove are locking parts (532), the middle of the U-shaped groove is a sliding part (531), and the sliding direction of the setting pin (54) in the second strip hole (52) is the same as the direction of the setting pin (54) moving back and forth between the locking part (532) and the sliding part (531).

3. The transmission box with a limiting structure according to claim 1, characterized in that: The transmission assembly (3) comprises a first transmission rod (31) for connecting to the shift rod (4) and a second transmission rod (32) mounted opposite to the first transmission rod (31). A linkage mechanism (33) for enabling relative movement between the first transmission rod (31) and the second transmission rod (32) is further provided between the first transmission rod (31) and the second transmission rod (32).

4. The transmission box with a limiting structure according to claim 3, characterized in that: The linkage mechanism (33) comprises a first rack (331) arranged on the first transmission rod (31) and a second rack (332) arranged on the second transmission rod (32); the first rack (331) and the second rack (332) are arranged relative to each other; the first rack (331) and the second rack (332) are meshedly connected via a gear set (333); when the first transmission rod (31) slides, the gear set (333) drives the second transmission rod (32) to slide relative to each other.

5. The transmission box with a limiting structure according to claim 4, characterized in that: The gear set (333) comprises at least one gear, and the gear is rotatably mounted on the transmission box body (1).

6. A transmission box with a limiting structure according to any one of claims 1 to 5, characterized in that: The transmission box body (1) is provided with a sealing cover (2) for sealing the box body.

Images