Linkage mechanism for controlling lock tongue

Abstract

The utility model provides a linkage mechanism for controlling a spring bolt, and belongs to the technical field of vehicle locks. The linkage mechanism, the lock cylinder assembly and the spring bolt are all installed in the shell, the external lock catch is installed on the side, corresponding to the spring bolt, of the shell, the linkage mechanism comprises a front crank arm and a rear crank arm, one end of the rear crank arm is connected into the shell through a shaft, the other end of the rear crank arm is connected with one end of the front crank arm through a plug pin, and the other end of the front crank arm is connected with a spring bolt shaft. The joint of the front crank arm and the rear crank arm is a force application point, the force application point is stressed to move towards the outer side of the shell to drive the spring bolt to retract into the external lock catch to complete unlocking, and otherwise, the spring bolt is elastically reset and extends out of the external lock catch. The linkage mechanism is matched with the spring bolt, maximum deformation under low force is achieved, and the unlocking and locking processes are fast and light.

Description

Technical Field

[0001] The present application relates to a linkage mechanism for controlling a lock tongue, and belongs to the technical field of vehicle locks. Background Art

[0002] Latch assemblies are widely used in current RVs and other equipment. Generally, latch assemblies are installed on RV components such as doors and windows to achieve the effect of opening and locking.

[0003] A common implementation method (such as US2019 / 0316391A1) is to set an external handle assembly 82 that can be pulled at one end on the outside, and the external handle assembly 82 is provided with a handle cam 124. The rotating cam 134 and the handle cam 124 respectively abut against the surface 108 of the plunger cam 102. Pulling the external handle assembly 82 drives the handle cam 124 to move relative to the plunger cam 102, thereby driving the door latch 52 to move relative to achieve external door opening or locking.

[0004] This method solves the problem of opening and locking the door latch of the RV very well, but we found that it still has many defects in use, such as: the contact surface between the plug cam 102 and the handle cam 124 is an inclined surface (see Figure 6 , Figure 7 ), the plunger cam surface 108 is parallel to and slides on the cam surface 126, and the two exert force in a surface contact manner, and a long path is required to achieve effective displacement of the latch 52 in the opening and closing direction, which makes the operation difficult and laborious. Utility Model Content

[0005] In view of this, the present application provides a linkage mechanism for controlling the lock tongue, which not only realizes point force traction during the lock operation process, but also makes the opening and locking operations quick and lightweight.

[0006] Specifically, the present application is implemented through the following scheme:

[0007] A linkage mechanism for controlling a lock tongue, wherein the linkage mechanism and the lock tongue are both installed in a shell, and an external lock buckle is installed on one side of the shell corresponding to the lock tongue, the linkage mechanism comprises a front curved arm and a rear curved arm, one end of the rear curved arm is axially connected to the shell, the other end of the rear curved arm is connected to one end of the front curved arm through a latch, and the other end of the front curved arm is connected to the lock tongue shaft, and the connection between the front curved arm and the rear curved arm is a force application point, which is forced to move toward the outside of the shell, driving the lock tongue to retract into the external lock buckle to complete unlocking, otherwise the lock tongue is elastically reset and extends out of the external lock buckle.

[0008] Further, as a preference:

[0009] The linkage mechanism is correspondingly provided with an external handle assembly, one end of the external handle assembly is connected to the shell shaft, and the other end is a pull end. A cross arm is arranged on the inner side of the pull end, and the cross arm applies force to the pin connection of the linkage mechanism: when the pull end of the external handle assembly is pulled outward, the cross arm applies force to the curved arm connection of the linkage mechanism, driving the lock tongue to retract to the inside of the external lock buckle to complete the unlocking; conversely, the pull end of the external handle assembly is reset, and the lock tongue is elastically reset to extend out of the external lock buckle.

[0010] The horizontal arm is provided with a first closed opening which penetrates in a vertical direction, and the shape trajectory of the first opening is the displacement trajectory of the bolt during the linkage process of the lock tongue and the linkage mechanism.

[0011] A second opening is also provided on the cross arm, and the second opening penetrates the cross arm horizontally. The rear curved arm and the front curved arm extend from both sides of the second opening to form an overlap. The latch is vertically inserted (if a vertically penetrating and closed first opening is provided, it is inserted into the first opening) into the overlap of the rear curved arm and the front curved arm to realize pin connection between the rear curved arm and the front curved arm.

[0012] The rear curved arm and / or the front curved arm are composed of a plurality of sections of rods. More preferably, the rear curved arm and / or the front curved arm include a first section of rod and a second section of rod, and the first section of rod and the second section of rod are located on different planes.

[0013] The end of the front curved arm is provided with a connecting groove, and the locking tongue is connected to the front curved arm through the connecting groove.

[0014] A positioning pin is arranged in the housing, and the positioning pin is arranged corresponding to the pull end. More preferably:

[0015] The pull end is provided with a vertical arm, a limiting hole is provided on the vertical arm, and a positioning pin passes through the limiting hole to achieve the limiting of the pull end.

[0016] The vertical arm is located above the horizontal arm and is an integrated structure with the horizontal arm.

[0017] An elastic body is sleeved on the positioning pin, and the elastic body is located between the inner wall of the shell and the vertical arm.

[0018] A lock core assembly is installed in the shell, a connecting sleeve is installed on the lock core assembly, one end of the connecting rod is eccentrically connected to the connecting sleeve, and the other end is connected to the lock bolt.

[0019] A key capable of rotating the lock core assembly is arranged on the housing on the side where the outer handle assembly is located, so as to realize the opening and locking of the latch.

[0020] The lock latch and the lock tongue are both laterally displaced.

[0021] The electronic lock area is also included, and the electronic lock area controls the rotation of the lock core assembly in the form of an electronic lock to realize the opening and locking of the lock bolt corresponding to the lock tongue. More preferably, the electronic lock of the electronic lock area is any one of a key lock, an induction lock, and a fingerprint lock.

[0022] The linkage mechanism set up above, through the cooperation between the cross arm and the connection of the curved arm of the linkage mechanism, is operated when point contact is formed between the pulling end of the outer handle assembly and the linkage mechanism, so that the lock tongue can respond faster and more labor-savingly than the external lock buckle and latch, reducing the difficulty and strength of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure in the locked state in this application;

[0024] Figure 2 for Figure 1 Stereoscopic cross-section in the middle AA direction;

[0025] Figure 3 This is a diagram showing the coordination relationship between the cross arm and the latch in the locked state in this application;

[0026] Figure 4 It is a cross-sectional stereoscopic view of the linkage mechanism, the lock buckle, and the external lock buckle in the locked state in this application;

[0027] Figure 5 It is a cross-sectional front view of the linkage mechanism, the lock buckle, and the external lock buckle in the locked state in this application;

[0028] Figure 6 This is a schematic diagram of the three-dimensional structure of the internal control panel seat in this application;

[0029] Figure 7 This is a schematic diagram of the three-dimensional structure of the inner control panel seat from another perspective in this application;

[0030] Figure 8 This is a schematic diagram of the structure in the unlocked state in this application;

[0031] Fig. 9 for Figure 8 Stereoscopic cross-section in the middle BB direction;

[0032] Fig.10 It is a cross-sectional stereoscopic view of the linkage mechanism, the lock buckle, and the external lock buckle in the unlocked state in this application;

[0033] Fig.11 It is a cross-sectional front view of the linkage mechanism, lock buckle and external lock buckle in the unlocked state in this application.

[0034] Numbers in the figure: 1. External handle assembly; 11. External lock buckle; 12. Pull end; 13. Screw; 14. Limiting hole; 15. Vertical arm; 16. Horizontal arm; 161. First opening; 162. Second opening; 2. External control panel seat; 3. Key; 31. Lock core assembly; 32. Connecting rod; 33. Connecting sleeve; 34. Knob; 4. Lock buckle; 41. Latch; 42. Block; 43. Lock tongue; 431. Lock head; 432. First connecting block; 433. Second connecting block; 434. First elastic member; 5. Linkage mechanism; 51. Rear curved arm; 511. First section of rod; 512 Second section of rod; 52. Front curved arm; 521. Connecting groove; 53. First mounting axis; 54. Latch; 55. Second mounting axis; 6. Internal handle; 7. Internal plate; 71. Second elastic member; 72. Positioning pin; 73. Limiting block. DETAILED DESCRIPTION

[0035] The technical solution of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0036] This embodiment provides a linkage mechanism for controlling the lock tongue, which can cooperate with the outer handle assembly 1, the external lock buckle 11 and the housing and other components to form a linkage component for controlling the state of the lock tongue relative to the external lock buckle 11.

[0037] Combination Figure 1 , combined with Figure 3 , Figure 4 The linkage mechanism 5 for controlling the lock tongue of the present application includes a rear curved arm 51 and a front curved arm 52. One end of the rear curved arm 51 is fixedly pinned to the inner plate 7 axis through a first mounting shaft 53, and the other end of the rear curved arm 51 penetrates into the second opening 162 in the horizontal direction of the cross arm 16. One end of the rear curved arm 51 extends into the second opening 162 and is pinned to the front curved arm 52 through a latch 54. The latch 54 penetrates the first opening 161 in the vertical direction of the cross arm 16 and is perpendicular to the rear curved arm 51 and the front curved arm 52. The other end of the front curved arm 52 is connected to the lock tongue 43 and is installed in the connecting groove 521 together with the lock tongue 43, as shown in FIG. Figure 8 shown.

[0038] in:

[0039] A connection end is provided at the lower part of the outer handle assembly 1, and the connection end is installed on the vehicle wall of the outer control panel seat 2 facing the outside of the vehicle through a knurled pin. A torsion spring can be installed on the knurled pin as needed. A pull end 12 is provided at the upper part of the outer handle assembly 1, and a cross arm 16 is provided inside the pull end 12 and installed through a screw 13. The cross arm 16 is a square structure, and a first opening 161 is formed by passing through the slot in the vertical direction, and a second opening 162 is formed by passing through the slot in the horizontal direction. A vertical arm 15 is provided at one end of the cross arm 16 protruding from the outer handle assembly 1, and a limit hole 14 is provided on the vertical arm 15.

[0040] The housing includes an outer control panel seat 2 and an inner control panel seat, a sealing gasket is arranged inside the outer control panel seat 2, and a receiving cavity is formed between the outer control panel seat 2 and the inner control panel seat. An external lock 11 is installed on the side of the housing 2 and is provided with a lock port that allows the lock 4 to move.

[0041] The portion of the outer control panel seat 2 located above the outer handle assembly 1 is a locking end, and a lock hole for use with a key 3 is provided on the locking end, and a lock core assembly 31 is installed on the inner side of the outer handle assembly 1 corresponding to the lock hole. Figure 4 As shown in the figure, the lock core assembly 31 is connected to the connecting rod 32 through the connecting sleeve 33. The other end of the connecting rod 32 is connected to the latch 41. When the key 3 is turned, the connecting sleeve 33 is driven to rotate through the lock core assembly 31, and the connecting rod 32 is pulled along with the eccentric rotation of the connecting sleeve 33, and the latch 41 is also pulled accordingly. Therefore, the rotation of the key controls the in and out of the latch 41.

[0042] Combination Figure 1 , Figure 2 , Figure 4 The inner plate 7 is installed on the inner side of the inner control panel seat, that is, in the accommodating cavity formed between the outer control panel seat 2 and the inner control panel seat. On the side facing the outer control panel seat 2, a positioning pin 72 and a limit block 73 are fixed on the inner plate 7. The positioning pin 72 is arranged corresponding to the limit hole 14. A second elastic member 71 is mounted on the positioning pin 72, one end of which is fixed to the inner plate 7, and the other end is a movable end.

[0043] Taking the application in a motorhome as an example, the linkage mechanism 5 of this case and the lock buckle 4, the external handle assembly 1, the external lock buckle 11, the key 3, the lock core assembly 31, etc. form a motorhome lock.

[0044] When the lock tongue 43 is extended and in the locked state, the rear curved arm 51, the front curved arm 52, and the lock tongue 43 are in a horizontal stretched state, roughly forming a straight line. When the outer handle assembly 1 is pulled outward, the cross arm 16 moves outward with the outer handle assembly 1, and the latch 54 that runs through the first opening 161 is pulled outward along with it. The rear curved arm 51 rotates around the fixed position of the inner plate 7, and the front curved arm 52 rotates around the latch 54 point, and is pulled inward by the rear curved arm 51 at the same time, so that the rear curved arm 51 and the front curved arm 52 form an angle at the new position of the latch 54. The lock tongue 43 moves inward in the connecting groove 521 as the front curved arm 52 moves inward, and the lock tongue 43 retracts to achieve unlocking. When the external force of the outer handle assembly 1 is removed, the lock tongue 43 rebounds and resets through the first elastic member 436, such as a spring. Therefore, the lock tongue extends again and returns to the locked state. In the linkage mechanism of the present patent application, the force of the outer handle assembly 1 is concentrated on the latch 54, and the movement of the latch 54 drives the extension and contraction of the crank arm, so that the unlocking can be done with a small force, and the force transmission is easy and convenient, and the operation is convenient.

[0045] The lock buckle 4 is used in conjunction with the external lock buckle 11. Figure 2 , Figure 3 , Figure 4 , Figure 5 , including a latch 41 and a lock tongue 43, the latch 41 is located above the lock tongue 43, and the latch 41 is connected to the lock core assembly 31 through a connecting rod 32; the lock tongue 43 is usually an integrated structure, including a lock head 431, a first connecting block 432 and a second connecting block 433. The lock head 431 is a tongue part that cooperates with the external lock buckle 11 and extends out of the lock port of the external lock buckle 11. The lock head 431 is formed with a first connecting block 432 and a second connecting block 433 on the side close to the linkage mechanism 5.

[0046] The second connecting block 433 of the locking tongue 43 is located below the first connecting block 432. The second connecting block 433 is connected to the front curved arm 52 at the connecting groove 521 through the second mounting shaft 55. The second connecting block 433 is provided with a first elastic body 434 which may be in the form of a spring. The first elastic body 434 is located between the lock head 431 and the limit block 73 and is used for the rebound and reset of the locking tongue 43.

[0047] When the RV lock is in the locked state, the components are as follows Figures 2 to 5 As shown: the second connecting block 433, the rear curved arm 51 and the front curved arm 52 are basically on the same straight line, the latch 54 is located in front of the first opening 161, the first elastic body 434 on the second connecting block 433 is in an uncompressed deformation state, and the latch 41 and the lock head 43 both protrude outside the lock opening of the external lock buckle 11.

[0048] When operating outdoors, the key 3 rotates counterclockwise, the lock core assembly 31 rotates, driving the connecting sleeve 33 installed thereon to rotate accordingly, pulling the connecting rod 32 to move toward the lock core assembly 31, and pulling the latch 41 connected to the connecting rod 32 to move in the same direction, and the latch 41 retracts into the inner side of the external lock buckle 11; at this time, the outer handle assembly 1 is pulled outward, and the connecting end of the outer handle assembly 1 rotates around the installation axis, and the pulling end 12 of the outer handle assembly 1 drives the cross arm 16 The latch 54 in the first opening 161 is displaced outward, so that the ends of the rear curved arm 51 and the front curved arm 52 connected to the latch 54 are pulled outward by the cross arm 16, and an angle is formed between the rear curved arm 51 and the front curved arm 52. The front curved arm 52 pulls the second connecting block 433 to move toward the second opening 162, and the lock head 431 and the first connecting block 432 are displaced synchronously with the second connecting block 433. The lock head 431 is also retracted into the inner side of the external lock buckle 11. Figures 8 to 11 In the open state, the RV door can be opened by pushing the door. The first elastic body 434 mounted on the second connecting block 433 cannot be synchronously displaced due to the restriction of the limiting block 73, and can only be compressed and deformed.

[0049] When the outer handle assembly 1 is reset, the first opening 161 provides a movable space for the latch 54, and the first elastic body 434 is no longer stressed. Since the rear curved arm 51 is axially connected to the inner plate 7, the contraction deformation of the first elastic body 434 is restored, and the deformation recovery effect pushes the second connecting block 433 to move away from the second opening 162, and the rear curved arm 51 and the front curved arm 52 are stretched until the lock head 431 extends out of the lock port of the external lock buckle 11. At the same time, the connecting end of the outer handle assembly 1 can also return to its original position with the help of the torsion spring. Therefore, the first opening 161 of the cross arm 16 is set to a certain opening space to give the latch 54 a certain restoring movable space.

[0050] Since the first opening 161 on the cross arm 16 cooperates with the latch 54 to achieve force transmission in a point contact manner, only a slight force is needed to change the locking state of the door lock. Compared with the existing surface contact control method, both the force application degree and the response speed are lighter and faster.

[0051] When the RV door is locked from the outside, the key 3 is rotated clockwise. At this time, the lock core assembly 31 rotates accordingly, and the connecting rod 32 is pushed to move through the connecting sleeve 33. The latch 41 moves in the same direction as the connecting rod 32 until the latch 41 protrudes out of the lock port of the external lock buckle 11, and the latch 41 and the lock tongue 43 return to the locked position. Figures 2 to 5 Lock status shown.

[0052] Combination Figure 7 The inner handle 6 is pin-connected with the inner control panel seat, and the inner control panel seat is connected to the lock core assembly 31 through the knob 34 to realize the operation inside the vehicle. The setting of the inner handle 6 can cooperate with the linkage mechanism of the present application together with the outer handle assembly 1 to complete the opening and locking control of the lock tongue 43 inside and outside the door.

[0053] In the solution of the present application, the first opening 161 and the second opening 162 are provided so that the linkage mechanism 5 can be displaced within the range defined by the first opening 161 and the second opening 162, which not only provides the linkage mechanism 5 with room for movement, but also avoids the outer handle assembly 1 and the linkage mechanism 5 from being stuck.

[0054] In addition, the positioning pin 72 is correspondingly arranged with the pull end 12, and a second elastic member 71 is arranged thereon, which facilitates the reset of the pull end 12, and realizes the automatic reset of the pull end 12 of the outer handle assembly 1 when no force is applied. The second elastic member 71 can be a spring. At the same time, the positioning pin 72 is connected to the vertical arm 15 through the elliptical limiting hole 14, ensuring that the pull end 12 of the outer handle assembly 1 is not subjected to excessive force, causing damage to the entire RV lock structure.

[0055] The horizontal arm 16 is fixedly connected to the pull end 12 by means of screws 17, so as to achieve synchronous displacement of the horizontal arm 16 and the pull end 12. The vertical arm 15 and the horizontal arm 16 can be provided separately and connected by fasteners, or can be provided as an integrated structure.

[0056] The rear curved arm 51 and the front curved arm 52 can both adopt a multi-section structure, and adjacent sections can be located on different planes. Figure 3 For example, the rear curved arm 51 can adopt a two-stage structure, that is, it is composed of a first section rod 511 and a second section rod 512 of an integrated structure. The first section rod 511 adopts a horizontal structure to facilitate the installation of the first installation shaft 53. The second section rod 512 is transitionally connected to the first section rod 511 through a smooth slope, so that the second section rod 512 is slightly higher than the first section rod 511, which is convenient for its connection with the front curved arm 52 and the cross arm 16. The front curved arm 52 can adopt a similar structure. The multi-stage structure can achieve more convenient installation in a limited space.

[0057] A connecting groove 521 is provided at one end of the front curved arm 52 facing the second connecting block 433, and the end of the second connecting block 433 is formed into a shape that can be inserted into the connecting groove 521. When the front curved arm 52 and the second connecting block 433 are inserted through the connecting groove 521, the two are conveniently pinned together to form a joint rotation.

[0058] When the linkage mechanism is in operation, the point contact force between the cross arm 16 and the latch 54 gives the entire control process a faster and easier response, reduces the difficulty and strength of operation, and achieves the reset of the components that have completed the corresponding action during the operation.

[0059] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A linkage mechanism for controlling a lock tongue, wherein the linkage mechanism and the lock tongue are both installed in a housing, and an external lock buckle is installed on one side of the housing corresponding to the lock tongue, characterized in that: The linkage mechanism includes a front curved arm and a rear curved arm, one end of the rear curved arm is axially connected to the shell, the other end of the rear curved arm is connected to one end of the front curved arm through a latch, the other end of the front curved arm is connected to the lock tongue shaft, the connection between the front curved arm and the rear curved arm is a force application point, the force application point is forced to move toward the outside of the shell, driving the lock tongue to retract into the inside of the external lock buckle to complete the unlocking, otherwise the lock tongue elastically returns to its original position and extends out of the external lock buckle.

2. A linkage mechanism for controlling a lock tongue according to claim 1, characterized in that: The end of the front curved arm is provided with a connecting groove, and the locking tongue is connected to the front curved arm through the connecting groove.

3. A linkage mechanism for controlling a lock tongue according to claim 1, characterized in that: The linkage mechanism is correspondingly provided with an outer handle assembly, one end of which is connected to the housing shaft, and the other end is a pull end, a cross arm is provided inside the pull end, and the cross arm applies force to the force application point connection: When the pulling end of the outer handle assembly is pulled outward, the horizontal arm applies force to the connection of the curved arm, driving the lock tongue to retract into the inside of the external lock buckle to complete the unlocking. Conversely, the pulling end of the outer handle assembly is reset, and the lock tongue is elastically reset and extends out of the external lock buckle.

4. A linkage mechanism for controlling a lock tongue according to claim 3, characterized in that: The horizontal arm is provided with a first closed opening which penetrates in a vertical direction, and the shape trajectory of the first opening is the displacement trajectory of the bolt during the linkage process between the lock tongue and the linkage mechanism.

5. The linkage mechanism for controlling the lock tongue according to claim 3, characterized in that: The cross arm is provided with a second opening, which runs through the cross arm transversely. The rear curved arm and the front curved arm extend from both sides of the second opening to form an overlap. The latch is vertically inserted into the overlap of the rear curved arm and the front curved arm to realize the pin connection of the rear curved arm and the front curved arm.

6. A linkage mechanism for controlling a lock tongue according to claim 3, characterized in that: A positioning pin is arranged in the shell, and the positioning pin is arranged corresponding to the pull end.

7. A linkage mechanism for controlling a lock tongue according to claim 6, characterized in that: The pull end is provided with a vertical arm, a limiting hole is provided on the vertical arm, and a positioning pin passes through the limiting hole to achieve the limiting of the pull end.

8. A linkage mechanism for controlling a lock tongue according to claim 7, characterized in that: The vertical arm is located above the horizontal arm and is an integrated structure with the horizontal arm.

9. The linkage mechanism for controlling a lock tongue according to claim 6, characterized in that: An elastic body is sleeved on the positioning pin, and the elastic body is located between the inner wall of the shell and the vertical arm.

10. The linkage mechanism for controlling a lock tongue according to claim 3, characterized in that: A key capable of rotating the lock core assembly is arranged on the housing on the side where the outer handle assembly is located, so as to realize the opening and locking of the latch.

11. The linkage mechanism for controlling a lock tongue according to claim 1, characterized in that: The rear curved arm and / or the front curved arm are composed of multiple sections of rods.

12. A linkage mechanism for controlling a lock tongue according to any one of claims 1 to 11, characterized in that: A lock core assembly is arranged in the shell, a connecting sleeve is installed on the lock core assembly, one end of the connecting rod is eccentrically connected to the connecting sleeve, and the other end is connected to the lock bolt.

13. A linkage mechanism for controlling a lock tongue according to claim 12, characterized in that: The lock latch and the lock tongue are both laterally displaced.

14. The linkage mechanism for controlling a lock tongue according to claim 12, characterized in that: The electronic lock area is also included, and the electronic lock area controls the rotation of the lock core component in the form of an electronic lock to realize the opening and locking of the lock bolt.

15. A linkage mechanism for controlling a lock tongue according to claim 14, characterized in that: The electronic lock in the electronic lock area is a key lock, an induction lock or a fingerprint lock.

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