A switch trigger structure and a tailgate self-suction lock using the same

Abstract

The utility model relates to vehicle lock technical field, concretely is a kind of switch trigger structure and use the tail door self-suction lock of this structure, it includes ratchet wheel and pawl, ratchet wheel rotation connects first pivot and sets up first torsional spring, first switch is set up in ratchet wheel side, trigger block is set up in ratchet wheel and cooperates with first switch, trigger block is against first switch when ratchet wheel is in the open state, trigger block no longer is against first switch when ratchet wheel is in half lock state, pawl rotation connects second pivot and sets up second torsional spring, the pressing block for pressing ratchet wheel and realizing full lock state is set up on pawl, second switch is set up in pawl side, it is characterized in that, rotatable rotating block is set up corresponding to second switch, rotating block rotation connects third pivot and sets up third torsional spring, one end of rotating block is provided with trigger head and cooperates with second switch, the other end is provided with push block, ratchet wheel is provided with the fender strip and cooperates with push block, limit block is set up on pawl.

Description

Technical Field

[0001] This utility model relates to the field of vehicle lock technology, specifically to a switch triggering structure and a tailgate self-closing lock using the structure. Background Technology

[0002] As living standards improve, many families are choosing SUVs with more space. The tailgates of SUVs have also changed from traditional manual opening and closing to electric opening and closing. During the opening and closing process, an electric push rod is used in conjunction with a self-closing lock. However, the current self-closing lock has a flaw in its full-lock determination logic. Too many signals are triggered during the locking process, making it impossible to accurately trigger the full-lock signal of the self-closing lock, which is prone to misjudgment. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this utility model provides a switch triggering structure that can accurately trigger the full lock signal and achieve precise control.

[0004] The technical solution is as follows: A switch triggering structure includes a ratchet and a pawl. The ratchet is rotatably connected to a first rotating shaft and is provided with a first torsion spring. A first switch is provided next to the ratchet. A trigger block that cooperates with the first switch is provided on the ratchet. When the ratchet is in the open state, the trigger block abuts against the first switch. When the ratchet is in the half-locked state, the trigger block no longer abuts against the first switch. The pawl is rotatably connected to a second rotating shaft and is provided with a second torsion spring. A pressure block for pressing the ratchet to achieve a fully locked state is provided on the pawl. A second switch is provided next to the pawl. A rotatable rotating block is provided corresponding to the second switch. The rotating block is rotatably connected to a third rotating shaft and is provided with a third torsion spring. One end of the rotating block is provided with a contact point that cooperates with the second switch. The switch has a trigger head and a toggle block at one end. A stop bar that engages with the toggle block is provided on the ratchet, and a limit block is provided on the pawl. Before the ratchet moves from an open to a half-locked state, the end of the toggle block near the ratchet abuts against the outer side of the stop bar, and the limit head of the rotating block abuts against the second switch. When the ratchet is in a half-locked state, the end of the toggle block near the ratchet abuts against the end of the stop bar, and the trigger head of the rotating block abuts against the second switch. Before the ratchet moves from a half-locked state to a fully locked state, the toggle block abuts against the limit block, and the trigger head of the rotating block abuts against the second switch. When the ratchet is in a fully locked state, the middle part of the toggle block abuts against the limit block, and the trigger head of the rotating block no longer abuts against the second switch.

[0005] A further feature is that the other end of the lever is provided with a limiting groove that cooperates with the limiting block;

[0006] The middle of the push block has a slot that cooperates with the limiting block;

[0007] A ratchet buffer block is provided on the outer side of the end of the ratchet away from the second switch;

[0008] A ratchet buffer block is provided on the outer side of the end of the ratchet away from the first switch;

[0009] The outer surface of the baffle is curved, and the outer surfaces of the trigger block and the trigger head are also curved.

[0010] A tailgate self-closing lock includes a lock housing, an unlocking transmission mechanism, a locking transmission mechanism, a drive motor, a transmission gear set, and a switch triggering structure. The transmission gear set includes a first gear cooperating with the drive motor, a second gear coaxially arranged with the first gear, and a third gear meshing with the second gear. The lock is characterized by having a pawl unlocking head on the pawl and a ratchet locking head on the ratchet. The unlocking transmission mechanism includes an unlocking rotating block rotatably connected to a fourth rotating shaft and equipped with an unlocking reset torsion spring. An unlocking transmission block is mounted on the third gear, and an unlocking end cooperating with the pawl unlocking head is provided on the unlocking rotating block. The locking transmission mechanism includes a transmission locking component, a trigger locking component, and a locking protrusion mounted on the third gear. The transmission locking component is hinged to the trigger locking component. One end of the trigger locking component is rotatably connected to a fifth rotating shaft and equipped with a locking reset torsion spring. The other end of the trigger locking component is a locking end cooperating with the ratchet locking head. The locking protrusion is used to push the transmission locking component to swing.

[0011] A further feature is that the lock housing is provided with an unlocking handle that drives the unlocking rotating block to rotate for unlocking;

[0012] The transmission upper locking component is provided with a reset protrusion;

[0013] One end of the transmission locking component has an opening that mates with the locking protrusion;

[0014] A third switch is provided next to the unlocking transmission block.

[0015] By adopting this utility model, the triggering method at the pawl has been redesigned. A lever is set at the pawl, and the movement of the lever is restricted by the lever, the stop bar on the ratchet, and the limit block on the pawl. This allows the lever to always press against the second switch throughout the entire process from the ratchet unlocked state to the fully locked state. The second switch trigger signal is released only when the fully locked state is entered, thus achieving precise control. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the switch triggering structure of this utility model (fully locked state);

[0018] Figure 3 A first-person view illustration of the unlocked transmission mechanism;

[0019] Figure 4 A second-view diagram of the unlocking transmission mechanism (unlocking handle omitted);

[0020] Figure 5 This is a first-person view schematic diagram of the locking transmission mechanism;

[0021] Figure 6 This is a second-view schematic diagram of the locking transmission mechanism;

[0022] Figure 7 This is a first-person view illustration of the toggle block;

[0023] Figure 8 This is a schematic diagram of the second perspective of the toggle block;

[0024] Figure 9 This is a diagram showing the ratchet in the open position.

[0025] Figure 10 This is a timing diagram of the ratchet's process from opening to partial locking;

[0026] Figure 11 This is a timing diagram showing the ratchet about to reach the half-lock state.

[0027] Figure 12 The timing diagram for the ratchet entering the half-lock state;

[0028] Figure 13 This is a timing diagram of the ratchet about to disengage from the half-lock state.

[0029] Figure 14 The timing diagram shows the ratchet disengaging from the half-lock state.

[0030] Figure 15 Timing for the ratchet to enter the fully locked state Figure 1 ;

[0031] Figure 16 Timing for the ratchet to enter the fully locked state Figure 2 ;

[0032] Figure 17 This is a diagram illustrating the ratchet entering the fully locked state.

[0033] Figure 18 Timing for unlocking Figure 1 ;

[0034] Figure 19 Timing for unlocking Figure 2 ;

[0035] Figure 20 Timing for unlocking Figure 3 ;

[0036] Figure 21 Timing for unlocking Figure 4 ;

[0037] Figure 22 Timing for unlocking Figure 5 ;

[0038] Figure 23 Timing for unlocking Figure 6 ;

[0039] Figure 24 Timing for unlocking Figure 7 ;

[0040] Figure 25 Timing for unlocking Figure 8 . Detailed Implementation

[0041] See Figure 1 , Figure 2 , Figure 7 , Figure 8 As shown, a switch triggering structure includes a ratchet 1 and a pawl 2. The ratchet 1 is rotatably connected to a first rotating shaft 3 and is provided with a first torsion spring 4. A first switch 5 is provided next to the ratchet 1. A trigger block 6 is provided on the ratchet 1 to cooperate with the first switch 5. When the ratchet 1 is in the open state, the trigger block 6 abuts against the first switch 5. When the ratchet 1 is in the half-locked state, the trigger block 6 no longer abuts against the first switch 5. The pawl 2 is rotatably connected to a second rotating shaft 7 and is provided with a second torsion spring 8. A pressure block 9 is provided on the pawl 2 to press the ratchet 1 to achieve a fully locked state. A [missing information - likely a typo, should be "not provided"]. The second switch 10 is provided with a rotatable rotating block 11. The rotating block 11 is rotatably connected to the third rotating shaft 38 and is provided with a third torsion spring (not shown in the figure). One end of the rotating block 11 is provided with a trigger head 12 that cooperates with the second switch 10, and the other end is provided with a toggle block 13. The ratchet 1 is provided with a stop bar 14 that cooperates with the toggle block 13. The pawl 2 is provided with a limit block 15. The middle of the toggle block 13 is provided with a slot 16 that cooperates with the limit block 15, and the other end of the toggle block 13 is provided with a limit groove 39 that cooperates with the limit block 15.

[0042] A ratchet buffer block 17 is provided on the outer side of the end of the ratchet 2 away from the second switch 10; a ratchet buffer block 40 is provided on the outer side of the end of the ratchet 1 away from the first switch 5, which plays a certain role in buffering and protection.

[0043] The outer surface of the stop bar 14 is curved, and the outer surfaces of the trigger block 6 and the trigger head 12 are also curved, so that when the ratchet 1 and the rotating block 11 rotate, they can always press the first switch 5 and the second switch 10 with a constant force.

[0044] The locking process is explained below, see... Figures 9-17 As shown.

[0045] Before the ratchet 1 is in the open to the half-locked state, the end of the toggle block 13 near the ratchet 1 abuts against the outer side of the stop bar 14, and the trigger head 12 of the rotating block 11 abuts against the second switch 10. As the ratchet rotates counterclockwise, the toggle block 13 is always blocked by the outer side of the stop bar 14 and will not rotate counterclockwise.

[0046] When the ratchet 1 rotates clockwise to the half-locked state, the outer side of the stop bar 14 no longer blocks the toggle block 13. The toggle block 13 rotates counterclockwise a little under the action of the third torsion spring, but is still blocked by the end of the stop bar 14 and cannot continue to rotate. At this time, the trigger head 12 of the rotating block 11 still presses against the second switch 10.

[0047] Before the ratchet 1 reaches the fully locked state from the half-locked state, the stop bar 14 no longer blocks the toggle block 13. The toggle block 13 continues to rotate counterclockwise until the limit groove 39 at the other end of the toggle block 13 abuts against the limit block 15, preventing it from continuing to rotate. The trigger head 12 of the rotating block 11 still abuts against the second switch 10.

[0048] When ratchet 1 is about to reach the fully locked position, its clockwise rotation will cause the pawl 2 to rotate slightly counterclockwise due to the pressure block 9, causing the limit block 15 to disengage from the limit groove 39. After ratchet 1 passes the pressure block 9, the pawl 2 will rotate clockwise, causing the pressure block 9 to press down on the ratchet 1 to achieve full locking. At this time, the position of the limit block 15 changes, passing above the toggle block 13. The toggle block 13 rotates counterclockwise until the limit block 15 is engaged in the slot 16, locking the toggle block 13. At this time, the trigger head 12 of the rotating block 11 no longer presses against the second switch 10, triggering a signal. During the locking process, this signal will only be triggered when the fully locked state is reached, and there will be no jump in the middle.

[0049] When unlocking is required, see Figure 18-25 As shown, when the pawl 2 is turned counterclockwise, the pressure block 9 disengages from the ratchet 1, the ratchet 1 resets counterclockwise, and the limiting block 15 disengages from the slot 16 and reaches above the lever 13, allowing the lever 13 to rotate clockwise until the limiting block 15 engages with the limiting groove 39, restricting the rotation of the lever 13. At this time, the trigger head 12 of the lever 13 presses against the second switch 10. As the ratchet 1 rotates counterclockwise, the end of the stop bar 14 first presses against the lever 13, causing it to swing clockwise until the lever swings against the outer side of the stop bar 14. The limiting block 15 disengages from the limiting groove 39, and the lever 13 is blocked by the outer side of the stop bar 14. The ratchet 1 rotates to the open state. Throughout the entire unlocking process, the trigger head 12 of the lever 13 always presses against the second switch 10, without any jumps, resulting in good stability.

[0050] See Figures 3 to 6As shown, a tailgate self-closing lock includes a lock housing 17, an unlocking transmission mechanism, a locking transmission mechanism, a drive motor 18, a transmission gear set, and a switch triggering structure. The transmission gear set includes a first gear 19 that cooperates with the drive motor 18, a second gear 20 that is coaxially arranged with the first gear 19, and a third gear 21 that meshes with the second gear 20. A pawl 2 is provided with a pawl unlocking head 22, and a ratchet 1 is provided with a ratchet locking head 23. The unlocking transmission mechanism includes an unlocking rotating block 25 that is rotatably connected to a fourth rotating shaft 24 and is provided with an unlocking reset torsion spring 26. The third gear 21 is also mounted on the fourth rotating shaft 24 and is provided with an unlocking transmission block 27. The unlocking rotating block 27 is provided with an unlocking end 28 that cooperates with the pawl unlocking head 22. When the drive motor 18 rotates clockwise, the third gear 21 rotates clockwise, the unlocking transmission block 27 rotates clockwise and pushes the unlocking rotating block 27 to rotate clockwise, and the unlocking end 28 pushes the pawl unlocking head 22 to the left to unlock.

[0051] The locking transmission mechanism includes a transmission locking component 29, a trigger locking component 30, and a locking protrusion 31 mounted on the third gear 21. The transmission locking component 19 and the trigger locking component 30 are hinged. One end of the trigger locking component 30 is rotatably connected to the fifth rotating shaft 32 and is equipped with a locking reset torsion spring 33. The other end of the trigger locking component 30 is a locking end 34 that cooperates with the ratchet locking head 23. When the drive motor 18 reverses, the third gear 21 rotates counterclockwise, and the locking protrusion 31 pushes the transmission locking component 29 to swing to the right, which in turn causes the trigger locking component 30 to swing counterclockwise. The locking end 34 pushes the ratchet locking head 23 to the right to lock. One end of the transmission locking component 29 has an opening that cooperates with the locking protrusion 31 to achieve stable pushing. In the locked state, the drive motor 18 is only started when the ratchet 1 rotates to the half-locked state, triggered by the first switch 5. When the ratchet 1 rotates to the fully locked state, the second switch 10 triggers a reset signal for the drive motor 18.

[0052] In addition to electric unlocking, it also has a manual unlocking function. An unlocking handle 35 is provided on the lock housing 17 to drive the unlocking rotating block 25 to rotate and unlock. Swinging the unlocking handle 35 on the outside of the lock housing 17 drives the unlocking rotating block 27 to rotate clockwise to unlock. When the drive motor 18 malfunctions while locked, a reset protrusion 36 is provided on the transmission locking component 29 for reset. When the unlocking rotating block 27 rotates clockwise, it can press against the reset protrusion 36, driving the transmission locking component 29 and triggering the locking component 30 to reset. Simultaneously, the third gear 21 also resets clockwise, ultimately achieving motor reset. A third switch 37 is provided next to the unlocking transmission block 27.

Claims

1. A switch triggering structure, comprising a ratchet and a pawl, wherein the ratchet is rotatably connected to a first rotating shaft and provided with a first torsion spring, a first switch is provided beside the ratchet, a trigger block cooperating with the first switch is provided on the ratchet, the pawl is rotatably connected to a second rotating shaft and provided with a second torsion spring, and a pressure block for pressing the ratchet to achieve a fully locked state is provided on the pawl, characterized in that, A second switch is provided next to the pawl, and a rotatable rotating block is provided corresponding to the second switch. The rotating block is rotatably connected to a third rotating shaft and is provided with a third torsion spring. One end of the rotating block is provided with a trigger head that cooperates with the second switch, and the other end is provided with a lever. A stop bar that cooperates with the lever is provided on the ratchet, and a limit block is provided on the pawl. Before the ratchet is in the open to half-locked state, the end of the lever near the ratchet abuts against the outer side of the stop bar, and the limit head of the rotating block abuts against the second switch. When the ratchet is in the half-locked state, the end of the lever near the ratchet abuts against the end of the stop bar, and the trigger head of the rotating block abuts against the second switch. Before the ratchet is in the half-locked to fully locked state, the lever abuts against the limit block, and the trigger head of the rotating block abuts against the second switch. When the ratchet is in the fully locked state, the middle part of the lever abuts against the limit block, and the trigger head of the rotating block no longer abuts against the second switch.

2. The switch triggering structure according to claim 1, characterized in that, The other end of the lever is provided with a limiting groove that cooperates with the limiting block.

3. The switch triggering structure according to claim 1, characterized in that, The center of the push block has a slot that cooperates with the limiting block.

4. The switch triggering structure according to claim 1, characterized in that, A ratchet buffer block is provided on the outer side of the end of the ratchet furthest from the second switch, and a ratchet buffer block is provided on the outer side of the end of the ratchet furthest from the first switch.

5. The switch triggering structure according to claim 1, characterized in that, The outer surface of the baffle is curved, and the outer surfaces of the trigger block and the trigger head are also curved.

6. A tailgate self-closing lock, comprising a lock housing, an unlocking transmission mechanism, a locking transmission mechanism, a drive motor, a transmission gear set, and the switch triggering structure of claim 1, wherein the transmission gear set comprises a first gear cooperating with the drive motor, a second gear coaxially arranged with the first gear, and a third gear meshing with the second gear, characterized in that, The pawl is provided with a pawl unlocking head, the ratchet is provided with a ratchet locking head, the unlocking transmission mechanism includes an unlocking rotating block rotatably connected to a fourth rotating shaft and provided with an unlocking reset torsion spring, the third gear is mounted with an unlocking transmission block, and the unlocking rotating block is provided with an unlocking end that cooperates with the pawl unlocking head; the locking transmission mechanism includes a transmission locking component, a trigger locking component, and a locking protrusion mounted on the third gear, the transmission locking component is hinged to the trigger locking component, one end of the trigger locking component is rotatably connected to a fifth rotating shaft and provided with a locking reset torsion spring, the other end of the trigger locking component is a locking end that cooperates with the ratchet locking head, and the locking protrusion is used to push the transmission locking component to swing.

7. A tailgate self-closing lock according to claim 6, characterized in that, The lock housing is provided with an unlocking handle that drives the unlocking rotating block to rotate and unlock.

8. A tailgate self-closing lock according to claim 6, characterized in that, The transmission upper locking component is provided with a reset protrusion.

9. A tailgate self-closing lock according to claim 6, characterized in that, One end of the transmission locking component has an opening that engages with the locking protrusion.

10. A tailgate self-closing lock according to claim 6, characterized in that, A third switch is provided next to the unlocking transmission block.

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