Connecting rod lock

Abstract

The utility model relates to a connecting rod lock which comprises a lock body, a handle, a connecting rod and a connecting rod transmission mechanism, one end of the handle is pivoted on a rotating shaft at one end of a groove cavity of the handle, the other end of the handle can be buckled into the groove cavity of the handle, and the rotating shaft is connected with the connecting rod through the connecting rod transmission mechanism. The driving wheel is provided with a self-locking component, the driving wheel is locked on the lock body through the self-locking component when the driving wheel is located at the locking position, the rotating shaft has an idle stroke and a driving movement stroke between the unlocking position and the locking position, the rotating shaft enters the driving movement stroke after the idle stroke, and an unlocking piece and a driving piece are arranged on the rotating shaft. When the rotating shaft is in the driving motion stroke, the driving piece and the driving wheel are connected and are in driving connection, and when the shifting wheel is in idle stroke motion in the direction from the locking position to the unlocking position, locking of the driving wheel by the self-locking component can be relieved through the unlocking piece. The lock has a locking function, the position of the handle is stable and reliable when the lock is in a locked state, and stable and reliable bouncing of the handle is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lock, in particular to a connecting rod lock. BACKGROUND

[0002] The connecting rod lock is a kind of lock for locking metal plate type cabinet frame and the like similar door frame.The connecting rod lock usually includes a lock body with handle slot cavity, handle slot cavity in the lock body is pivotally equipped with handle, handle is hinged on the pivot, handle can be ejected from handle slot cavity, pivot is equipped with driving wheel, connecting rod is slidably fitted on the lock body, rack portion with tooth hole on connecting rod is engaged with the teeth of driving wheel (on some connecting rod locks, driving wheel is not gear design, connecting rod can be connected to driving wheel by hinging), handle is pulled to drive pivot rotation, driving gear on pivot drives connecting rod, so as to drive upper and lower heaven and earth rods through connecting rod.But the existing connecting rod lock has the risk that handle is stuck in handle slot cavity, handle is scraped in lock body and is blocked from being ejected, for this situation, existing manufacturer technical focus is that handle is directly positioned between handle and lock body itself, positioning structure is formed by handle position, it does not understand the main technical problem causing handle scraping and being blocked from being ejected, so that the existing technical improvement scheme can not well solve the above problems.

[0003] Therefore, the technical reason causing handle blocking and scraping is needed to be discussed.In the process of experimental research on product, we find that, under the existing driving structure (driving wheel is directly fixed on pivot and drives connecting rod to act), reverse load force from connecting rod is transmitted to pivot through driving wheel, the deflection of pivot will cause the deflection of handle, so that handle leans on the wall of handle slot cavity, handle is scraped with the wall of handle slot cavity, which makes handle blocked from being ejected. SUMMARY

[0004] The utility model discloses the purpose: to overcome the defects in the prior art, the utility model provides a connecting rod lock with locking function, realizes that the handle position is stable and reliable when lock is in the state of locking, guarantees that the handle is ejected stably and reliably.

[0005] To realize the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A linkage lock includes a lock body, a handle, a linkage, and a linkage transmission mechanism. One end of the handle slot on the lock body has a rotating shaft, one end of the handle is pivotally mounted on the rotating shaft, and the other end of the handle can be engaged into the handle slot. The rotating shaft and the linkage are connected via the linkage transmission mechanism, which includes a drive wheel mounted on and coaxial with the rotating shaft. The handle has a locking position corresponding to the handle slot, and when the handle is rotated to the locking position, the drive wheel is driven to the locked position. The drive wheel is configured to rotate relative to the rotating shaft, and the drive wheel is configured with features for controlling the position of the drive wheel relative to the lock body. The self-locking component locks the drive wheel to the lock body when the drive wheel is in the locked position. The rotating shaft has a free travel that allows it to rotate relative to the drive wheel between the unlocked and locked positions, and a drive motion travel that drives the drive wheel to rotate synchronously. After the free travel, the rotating shaft enters the drive motion travel. The rotating shaft is equipped with an unlocking component and a driving component that reciprocate synchronously with the rotating shaft between the unlocked and locked positions. During the drive motion travel, the driving component engages with and drives the drive wheel. When the rotating shaft moves during the free travel from the locked position to the unlocked position, the unlocking component can release the self-locking component from locking the drive wheel.

[0007] Preferably, a dial wheel that rotates synchronously with the shaft is mounted on the shaft. The dial wheel and the self-locking component are respectively located on both sides of the drive wheel axially. The self-locking component includes a self-locking pin, which is slidably fitted onto the lock body along the drive wheel axially. A locking hole corresponding to the locking head end of the self-locking pin is provided through the drive wheel. An elastic element is connected to the tail end of the self-locking pin to drive the locking head end of the self-locking pin into the locking hole. The unlocking component is a protrusion on the dial wheel. A clearance slot is provided on the drive wheel to avoid the protrusion. The clearance slot passes through the locking hole, and the protrusion is placed in the clearance slot. When the shaft rotates to the end of its idle stroke in the unlocking position, the protrusion presses the self-locking pin out of the locking hole to complete the unlocking of the drive wheel.

[0008] Preferably, a top push shaft protrudes from the drive wheel, and the drive component includes a toggle bar-shaped hole formed on the dial wheel. The top push shaft is inserted into the toggle bar-shaped hole, and the dial wheel abuts against the top push shaft through the end of the toggle bar-shaped hole to drive the drive wheel to rotate. When the shaft moves during its idle stroke, the top push shaft moves within the toggle bar-shaped hole.

[0009] Preferably, the rotating shaft includes a main shaft and a limiting shaft head. The main shaft includes a hinge joint for hinged connection of the handle, a square shaft segment for mounting the dial wheel, and a positioning shaft segment for positioning the drive wheel. One end of the square shaft segment connected to the hinge joint has a first positioning shaft shoulder surface, and one end of the positioning shaft segment connected to the square shaft segment has a second positioning shaft shoulder surface. The other end of the positioning shaft segment is connected to the limiting shaft head. The drive wheel is mounted on the positioning shaft segment, and both ends of the drive wheel are axially limited by the second positioning shaft shoulder surface and the limiting shaft head, respectively. A square shaft hole is provided on the dial wheel, and the square shaft hole of the dial wheel is sleeved in the square shaft segment and axially limited by the first positioning shaft shoulder surface.

[0010] By adopting the above technical solution, during the unlocking operation, the handle pops out of the handle slot cavity. Turning the handle drives the rotating shaft to rotate. During the idle stroke, the rotating shaft releases the self-locking component from the drive wheel. Then, the rotating shaft enters the drive stroke, where the drive component engages with and drives the drive wheel. The rotating shaft drives the drive wheel to rotate, thereby pulling the lever to complete the unlocking action. During the locking operation, turning the handle drives the rotating shaft to rotate. During the idle stroke, the rotating shaft enters the drive stroke, where the drive component engages with and drives the drive wheel. The rotating shaft drives the drive wheel to rotate, thereby pulling the lever to complete the locking action until the drive wheel is in the locked position and locked to the lock body by the self-locking component. Afterward, the handle is snapped into the handle slot cavity. When the handle is in the locked position, the drive wheel is locked to the lock body by the self-locking component. The reverse load force generated at the lever is restricted after being transmitted to the drive wheel. More importantly, the shaft also has a free stroke, which can form a buffer effect. That is, when the drive wheel is subjected to the reverse load force, even if there is a certain amount of lateral movement, the drive wheel can still have a relative rotation stroke with the shaft, which can effectively prevent the reverse load force from being transmitted to the handle. Therefore, the handle will not rotate and scrape against the lock body, resulting in the inability to pop up.

[0011] The present invention will now be further described with reference to the accompanying drawings. Attached Figure Description

[0012] Figure 1 This is a diagram showing the pop-out state of the linkage lock handle of this utility model;

[0013] Figure 2 This is a schematic diagram of the linkage lock of this utility model;

[0014] Figure 3 This is a diagram showing the engagement state of the transmission part after the rear cover of the lock body of the linkage lock of this utility model is disassembled;

[0015] Figure 4 This is a schematic diagram of the transmission part of the linkage lock of this utility model;

[0016] Figure 5 for Figure 4 Exploded view;

[0017] Lock body 1, handle groove 11, handle 2, connecting rod 3, rotating shaft 4, main shaft 41, hinge joint 411, square shaft section 412, positioning shaft section 413, first positioning shaft shoulder surface 414, second positioning shaft shoulder surface 415, tail end 416, horizontal pin 43, limiting shaft head 42, dial wheel 4-1, square shaft hole 4-10, unlocking component 4-11, driving component 4-12, driving wheel 5, locking hole 51, clearance hole groove 52, top push shaft 53, self-locking component 6, self-locking pin 61, elastic element 62. Detailed Implementation

[0018] See appendix Figures 1-5 This utility model discloses a linkage lock, including a lock body 1, a handle 2, a connecting rod 3, and a linkage transmission mechanism. The lock body 1 has a handle groove 11, one end of which is provided with a rotating shaft 4. One end of the handle 2 is pivotally mounted on the rotating shaft 4, and the other end of the handle 2 can be fastened into the handle groove 11. The rotating shaft 4 and the connecting rod 3 are connected via the linkage transmission mechanism. The linkage transmission mechanism includes a drive wheel 5 disposed on and coaxial with the rotating shaft 4. The drive wheel 5 may be a gear design. Correspondingly, the connecting rod 3 uses a rack portion 31 to mesh with the drive wheel 5 for transmission. The handle 2 has a position corresponding to the handle groove 11 to achieve a locked position (e.g., when fastened into the handle groove 11). Figure 1 and Figure 2As shown), when the handle 2 is rotated to the locked position, the drive wheel 5 is driven to the locked position. The drive wheel 5 is configured to rotate relative to the rotating shaft 4. The drive wheel 5 is equipped with a self-locking member 6 for locking the position of the drive wheel 5 relative to the lock body 1. When the drive wheel 5 is in the locked position, it is locked to the lock body 2 via the self-locking member 6. The rotating shaft 4 has a free stroke between the unlocked and locked positions that allows it to rotate relative to the drive wheel 5, and a driving stroke that drives the drive wheel 5 to rotate synchronously. After the free stroke, the rotating shaft 4 enters the driving stroke. The rotating shaft 4 is provided with an unlocking member 4-11 and a driving member 4-12 that reciprocate synchronously with the rotating shaft 4 in the unlocked and locked positions. During the driving stroke, the driving member 4-12 engages with the drive wheel 5 and drives it. When the rotating shaft 4 moves during the free stroke from the locked position to the unlocked position, it can release the self-locking member 6 from locking the drive wheel 5 via the unlocking member 4-11. That is, the movement stroke of the rotating shaft 4 includes a free stroke and a driving stroke. When the rotating shaft 4 is driven by the handle 2 and starts moving from the locked position, it first goes through a free stroke. During this free stroke, the driving wheel 5, which is locked to the lock body 1 by the self-locking component 6, is unlocked. The driving wheel 5 changes from the locked state to the unlocked state. Then, the handle 2 is turned, and the driving component 4-12 on the rotating shaft 4 engages with the driving wheel 5 and enters the driving stroke. The handle 2 can then drive the driving wheel 5 to rotate. The driving wheel 5 pulls the connecting rod 3 to perform the unlocking action, and finally completes the unlocking. When locking, the handle 2 is turned in the opposite direction. The rotating shaft 4 driven by the handle 2 will go through a free stroke before the driving component 4-12 on the rotating shaft 4 engages with the driving wheel 5 and enters the driving stroke. The handle 2 can then drive the driving wheel 5 to rotate. The driving wheel 5 pulls the connecting rod 3 to perform the locking action, and finally completes the locking. When the driving wheel 5 reaches the locked position, the self-locking component 6 locks the driving wheel 5. In other words, at the beginning of the lock opening and closing operation, there is a period of free travel for the handle; at the same time, the drive wheel 5 is locked by the self-locking component 6 in the locked position. Thus, when the reverse load force from the connecting rod 3 is transmitted to the drive wheel 5, it is largely eliminated by the self-locking component 6. The disturbance of the reverse load force under the stroke is further buffered by the free travel and will not be transmitted to the rotating shaft 4, that is, it will not be transmitted to the handle 2. Therefore, the handle 2 will not rotate and scrape against the lock body 1, resulting in the inability to pop up.

[0019] To achieve a simpler, more compact, and more reliable structural design, a dial wheel 4-1 that rotates synchronously with the rotating shaft 4 is installed on the shaft 4. The dial wheel 4-1 and the self-locking component 6 are respectively located on both sides of the drive wheel 5 along the axial direction. The self-locking component 6 includes a self-locking pin 61, which slides along the axial direction of the drive wheel 5 on the lock body 1. A locking hole 51 is provided through the drive wheel 5, corresponding to the locking head end of the self-locking pin 61. An elastic element 62 is connected to the tail end of the self-locking pin 61 to drive the locking head end of the self-locking pin 61 into the locking hole 51. The elastic element 62 provides the self-locking elastic force that allows the self-locking pin 61 to automatically enter the locking hole 51 after the restriction is lifted. The elastic element 62 is generally a coil spring. The unlocking component 4-12 is a protrusion on the dial wheel 4-1. The drive wheel 5 is provided with a clearance slot 52 for avoiding the protrusion. The clearance slot 52 passes through the locking hole 51, and the protrusion is placed in the clearance slot 52. When the rotating shaft 4 rotates to the unlocking position to the end of the idle stroke, the protrusion presses the self-locking pin 61 out of the locking hole 51, completing the unlocking of the drive wheel 5. The dial wheel 4-1 rotates with the rotating shaft 4, and the protrusion on the dial wheel 4-1 inserts into the clearance slot 52. The locking hole 51 is on the movement path of the protrusion. When the rotating shaft 4 rotates to the unlocking position to the end of the idle stroke, the protrusion presses the self-locking pin 61 out of the locking hole 51, completing the unlocking of the drive wheel 5. It has the advantages of simplicity, compactness, and reliability. Based on this utility model, the structure of the self-locking component and the unlocking component can also be, for example, the self-locking component is designed to slide radially along the drive wheel (such as the engagement of a spring-loaded pin and a pin hole), and the unlocking component is a sleeve-shaped structure fixed on the rotating shaft.

[0020] Furthermore, a push-pull shaft 53 protrudes from the drive wheel 5. The drive component 4-12 includes a toggle bar-shaped hole formed on the dial wheel 4-1. The push-pull shaft 53 is inserted into the toggle bar-shaped hole, and the dial wheel 4-1 abuts against the push-pull shaft 53 through the end of the toggle bar-shaped hole to drive the drive wheel 5 to rotate. When the rotating shaft 4 moves during its idle stroke, the push-pull shaft 53 moves within the toggle bar-shaped hole. Based on the above, the drive component 4-12 adopts a hole-like structure on the dial wheel 4-1. The two ends of the toggle bar-shaped hole abut against the push-pull shaft 53 to achieve push-pull linkage. The length of relative movement of the push-pull shaft 53 provided by the toggle bar-shaped hole is the idle stroke length of the rotating shaft 4. The drive component's functional design is also achieved through the dial wheel, resulting in a simple and compact overall structure. At least two toggle bar-shaped holes are typically designed on the dial wheel 4-1, and the drive wheel 5 is provided with push-pull shafts 53 that correspond one-to-one with the toggle bar-shaped holes, increasing the points of force for linkage and ensuring stable and reliable drive. To accommodate the installation and use of door locks, specifically the linkage lock in both left-opening and right-opening configurations, the drive wheel 5 has a spare lock position hole, and the dial wheel 4-1 has a spare actuation strip hole.

[0021] To facilitate reliable installation of the shift wheel and drive wheel, the rotating shaft 4 includes a main shaft 41 and a limiting shaft head 42. The main shaft 41 includes, axially formed, a hinge joint 411 for hinged connection of the handle 2, a square shaft section 412 for mounting the shift wheel 4-1, and a positioning shaft section 413 for positioning the drive wheel 5. The end of the square shaft section 412 connected to the hinge joint 411 has a first positioning shaft shoulder surface 414, and the end of the positioning shaft section 413 connected to the square shaft section 412 has a second positioning shaft shoulder surface 415. The other end of the positioning shaft section 413 is connected to the limiting shaft head 42. The main shaft 41 has an insertable tail end 416. The limiting shaft head 42 is sleeved onto the tail end 416 and fixed by a cross pin 43. The drive wheel 5 is installed on the positioning shaft section 413. The two ends of the drive wheel 5 are respectively limited by the second positioning shaft shoulder surface 415 and the limiting shaft head 42. A square shaft hole 4-10 is provided on the dial wheel 4-1. The square shaft hole 4-10 of the dial wheel 4-1 is sleeved into the square shaft section 412 and is axially limited by the first positioning shaft shoulder surface 414.

[0022] In this utility model of linkage lock, when the handle 2 is engaged in the handle groove 11, that is, when the handle 2 is in the locked position, the drive wheel 5 is in the locked position, and the self-locking pin 61 of the self-locking component 6 is engaged in the locking hole 51 of the drive wheel 5 under the drive of the elastic element 62, that is, the drive wheel 5 is locked by the self-locking component 6. The push shaft 53 is located at one end of the actuating strip hole. The reverse load force from the linkage 3 is transmitted to the drive wheel 5 and is dissipated by the self-locking pin 61. Even if there is a certain disturbance, the actuating strip hole can provide a buffer movement space (i.e., free stroke) to ensure that the reverse load force transmitted to the drive wheel 5 will not be transmitted to the handle 2. Therefore, the handle 2 will not rotate and scrape against the lock body 1, resulting in the inability to pop up. During the unlocking operation, the unlocking handle 2 is released, and the handle 2 pops out of the handle slot 11. Rotating the handle 2 drives the rotating shaft 4 to rotate. During the idle stroke, the unlocking part 4-11 (protrusion) on the dial 4-1 moves to the unlocking position. The unlocking part 4-11 presses against the head of the self-locking pin 61, pushing the self-locking pin 61 out of the lock hole 51, thus releasing the self-locking component 6 from the lock of the drive wheel 5. During the idle stroke, the dial 4-1 and the drive wheel 5 rotate relative to each other. The push-pull shaft 53 on the drive wheel 5 moves from one end of the dialing strip hole to the other end. Continuing to turn the handle 2, the rotating shaft 4 enters the drive stroke. The rotating shaft 4, through the engagement of the dialing strip hole and the push-pull shaft 53, drives the drive wheel 5 to rotate, thereby pulling the lever 3 to complete the unlocking action. During the locking operation, turn the handle 2 to drive the rotating shaft 4 to rotate. The rotating shaft 4 moves during its free stroke, and the push pin 53 on the drive wheel 5 moves from one end of the push bar hole to the other end. Then the rotating shaft 4 enters the driving stroke, and the drive component 4-12 engages with the drive wheel 5 and drives it. The rotating shaft 4 drives the drive wheel 5 to rotate, which in turn pulls the lever 3 to complete the locking action until the drive wheel 5 is in the locked position. The self-locking pin 61 is driven by the spring and engages in the locking hole 51 to lock the drive wheel 5. After that, the handle 2 is snapped into the handle groove 11.

Claims

1. A linkage lock, comprising a lock body, a handle, a linkage, and a linkage transmission mechanism, wherein a rotating shaft is provided at one end of a handle slot on the lock body, one end of the handle is pivotally mounted on the rotating shaft, and the other end of the handle can be engaged into the handle slot, the rotating shaft and the linkage are connected via a linkage transmission mechanism, the linkage transmission mechanism including a drive wheel disposed on and coaxial with the rotating shaft, the handle having a locking position corresponding to the handle slot to achieve engagement into the handle slot, and when the handle is rotated to the locking position, the drive wheel is driven to the locked position, characterized in that: The drive wheel is configured to rotate relative to the shaft. The drive wheel is equipped with a self-locking member for locking the position of the drive wheel relative to the lock body. When the drive wheel is in the locked position, it is locked to the lock body via the self-locking member. The shaft has a free travel that allows it to rotate relative to the drive wheel between the unlocked and locked positions, and a drive motion travel that drives the drive wheel to rotate synchronously. After the free travel, the shaft enters the drive motion travel. The shaft is equipped with an unlocking member and a drive member that reciprocate synchronously with the shaft in the unlocked and locked positions. During the drive motion travel, the drive member engages with and drives the drive wheel. When the shaft moves during the free travel from the locked position to the unlocked position, the unlocking member can release the self-locking member from locking the drive wheel.

2. The linkage lock according to claim 1, characterized in that: A dial wheel that rotates synchronously with the shaft is mounted on the shaft. The dial wheel and the self-locking component are respectively located on both sides of the drive wheel axially. The self-locking component includes a self-locking pin, which slides along the drive wheel axially on the lock body. A locking hole corresponding to the locking head end of the self-locking pin is provided through the drive wheel. An elastic element is connected to the tail end of the self-locking pin to drive the locking head end of the self-locking pin into the locking hole. The unlocking component is a protrusion on the dial wheel. A clearance slot is provided on the drive wheel to avoid the protrusion. The clearance slot passes through the locking hole, and the protrusion is placed in the clearance slot. When the shaft rotates to the end of its idle stroke in the unlocking position, the protrusion presses the self-locking pin out of the locking hole to complete the unlocking of the drive wheel.

3. The linkage lock according to claim 2, characterized in that: A top push shaft protrudes from the drive wheel. The drive component includes a toggle bar-shaped hole formed on the dial wheel. The top push shaft is inserted into the toggle bar-shaped hole. The dial wheel abuts against the top push shaft through the end of the toggle bar-shaped hole to drive the drive wheel to rotate. When the shaft moves during its idle stroke, the top push shaft moves within the toggle bar-shaped hole.

4. The linkage lock according to claim 2, characterized in that: The rotating shaft includes a main shaft and a limiting shaft head. The main shaft includes a hinge joint for hinged connection of the handle, a square shaft segment for mounting the dial wheel, and a positioning shaft segment for positioning the drive wheel. The end of the square shaft segment connected to the hinge joint has a first positioning shaft shoulder surface, and the end of the positioning shaft segment connected to the square shaft segment has a second positioning shaft shoulder surface. The other end of the positioning shaft segment is connected to the limiting shaft head. The drive wheel is mounted on the positioning shaft segment, and both ends of the drive wheel are axially limited by the second positioning shaft shoulder surface and the limiting shaft head, respectively. The dial wheel has a square shaft hole, which is fitted into the square shaft segment and axially limited by the first positioning shaft shoulder surface.

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