Lock mechanism and lock for preventing inertial impact

Abstract

The present invention discloses a lock mechanism for preventing inertial impact, which includes a base, a lock piece, a lock catch, a lock control rod and an unlocking motor. The lock piece is rotatably connected to the base. Groove openings and first tooth openings are provided at intervals on the circumferential edge of the lock piece. The groove openings are used to hook the lock catch. The lock control rod is connected to the base. The lock control rod is subjected to a force to make the lock control rod close to the circumferential edge of the lock piece. The rotating shaft of the unlocking motor is connected to the lock control rod through a pulling assembly. The lock piece has a first position and a second position when rotating. When the lock piece is in the first position, the lock catch disengages from the groove opening to unlock. When the lock piece is in the second position, the lock catch is locked by hooking in the groove opening. When the lock control rod is at the first tooth opening, the lock piece is in the second position and the lock control rod restricts the rotation and unlocking of the lock piece. The pulling assembly pulls the lock control rod out of the first tooth opening when the rotating shaft rotates. The lock control rod has an inertia that is not sufficient to overcome the force to make it disengage from the first tooth opening. The present invention also discloses a lock having the lock mechanism. The present invention can prevent unlocking due to inertial impact and has good safety performance.

Description

Technical Field

[0001] The present invention relates to a lock mechanism, and particularly to a lock mechanism and a lock with anti-inertia impact resistance. Background Art

[0002] In traditional lock mechanisms, the lock and the linkage mechanism are independent entities, and a relatively large number of additional structures are required to achieve the effect of mechanical lock and motor linkage unlocking. At the same time, most of the linkage structures are link structures, and the link is connected to the lock control end. Under normal circumstances, the unlocking function is realized by driving one end of the link to move through a mechanical structure. However, in the case of being impacted by an external force, due to its own inertia, the link will generate a thrust or a pulling force on the lock control end even when the mechanical unlocking structure does not act, resulting in the lock being opened. Summary of the Invention

[0003] Aiming at the defects of the above-mentioned prior art, the present invention provides a lock mechanism with anti-inertia impact resistance, aiming to solve the problem that the linkage mechanism generates an unlocking action due to its own inertia when impacted by an external force, resulting in the lock being abnormally opened.

[0004] The technical solution of the present invention is as follows: A lock mechanism with anti-inertia impact resistance includes a base, a lock piece, a lock catch, a lock control rod, and an unlocking motor. The lock piece is rotatably connected to the base. Groove openings and first tooth openings are provided at intervals on the circumferential edge of the lock piece. The groove openings are used to hook the lock catch. The lock control rod is connected to the base. The lock control rod is subjected to a force, and the force causes the lock control rod to approach the circumferential edge of the lock piece. The rotating shaft of the unlocking motor is connected to the lock control rod through a pulling assembly. When the lock piece rotates, it has a first position and a second position. When the lock piece is in the first position, the lock catch disengages from the groove opening to unlock. When the lock piece is in the second position, the lock catch is hooked and locked by the groove opening. When the lock control rod is at the first tooth opening, the lock piece is in the second position and the lock control rod restricts the lock piece from turning from the second position to the first position. The pulling assembly pulls the lock control rod out of the first tooth opening when the rotating shaft rotates. The lock control rod has an inertia that is not sufficient to overcome the force to cause the lock control rod to disengage from the first tooth opening.

[0005] Further, the lock control rod is an arm of a torsion spring, and the force is the elastic force of the torsion spring.

[0006] Further, an elastic member is provided between the lock piece and the base, and the elastic member causes the lock piece to have a tendency to rotate from the second position to the first position. The elastic force of the elastic member is used to make the lock piece automatically rotate in the unlocked state to complete the unlocking, and there is no need to additionally provide a power component for driving.

[0007] Further, a side bracket is provided on the base. The lock piece is rotatably connected to the side bracket. A limiting strip hole is provided on the side bracket, and the lock control rod is inserted into the limiting strip hole. On the one hand, the limiting strip hole can limit the moving direction of the lock control rod, making the unlocking action more accurate and avoiding accidental actions of the lock control rod in non-unlocking directions. On the other hand, under the action of the elastic member between the lock piece and the base, the frictional force between the lock control rod and the limiting strip hole can further prevent the lock control rod from forming an unlocking action due to inertia after being impacted by an external force.

[0008] Further, the side brackets are arranged on both sides of the lock piece.

[0009] Further, a second tooth opening is provided on the circumferential edge of the lock piece. The groove opening and the second tooth opening are respectively located on both sides of the circumference of the first tooth opening. When the lock control rod is in the second tooth opening, it restricts the lock piece from rotating in the direction from the first position to the second position and then back to the first position. Through the restriction of the second tooth opening, it prevents the lock from over-rotating and causing the mechanism to jam.

[0010] Further, a limiting mechanism is provided on the base. The limiting mechanism is used to limit the moving distance of the lock control rod against the direction of the acting force. Through the limitation of the limiting mechanism, it prevents the lock control rod from disengaging from the back side of the second tooth opening when unlocking.

[0011] Another technical solution of the present invention is a lock, including the above-mentioned lock mechanism for preventing inertial impact and a mechanical lock dial. The mechanical lock dial is used to press the lock control rod to overcome the acting force for unlocking.

[0012] Further, the pulling component includes a runner and a linkage rod. The runner is connected to the rotating shaft of the unlocking motor, the linkage rod is eccentrically connected to the runner, and a long hole is provided on the linkage rod. The lock control rod is inserted into the long hole. By using the long hole on the linkage rod to leave room for the movement of the lock control rod, when the lock control rod is pressed by the mechanical lock dial, it will not be restricted by the unlocking motor, making the mechanical unlocking smoother.

[0013] The advantages of the technical solution provided by the present invention are as follows:

[0014] 1. The mass of the lock control rod in the linkage mechanism of the present invention is relatively light and has a small inertia. As the control component for locking the entire structure, its small inertia is not sufficient to generate the force required for unlocking when impacted by an external force, thus achieving the purpose of preventing inertial impact cracking and having good safety performance.

[0015] 2. The lock control rod serves as a linkage component between electric unlocking and mechanical unlocking and the lock piece, and at the same time directly serves as the locking component of the lock piece, with a compact structure and high integration.

[0016] 3. The force received by the lock control rod makes it difficult for the lock control rod to be unlocked due to inertia and leave the locked position. At the same time, after the motor or the mechanical lock paddle unlocks, it can automatically return to its position, and after the lock catch enters the groove opening and drives the lock piece to rotate, it automatically enters the first tooth opening for locking, realizing the function of automatic reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the anti-inertia impact lock (locked state) in an embodiment of the present invention.

[0018] Figure 2 is a schematic structural diagram of the anti-inertia impact lock (opened state) in an embodiment of the present invention.

[0019] Figure 3 is a three-dimensional structural diagram of the anti-inertia impact lock mechanism (locked state) in an embodiment of the present invention.

[0020] Figure 4 is a three-dimensional structural diagram of the anti-inertia impact lock mechanism (opened state) in an embodiment of the present invention.

[0021] Figure 5 is an exploded view of the anti-inertia impact lock mechanism in an embodiment of the present invention.

[0022] Figure 6 is Figure 1 a top view schematic diagram of...

[0023] Figure 7 is Figure 1 a left view schematic diagram of...

[0024] Figure 8 is Figure 7 a partial schematic diagram at I in...

[0025] Figure 9 is Figure 2 a top view schematic diagram of...

[0026] Figure 10 is Figure 2 a left view schematic diagram of...

[0027] Figure 11 is Figure 10 a partial schematic diagram at II in... DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The present invention will be further described below in conjunction with embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. After reading this description, various equivalent modifications made by those skilled in the art to this description fall within the scope defined by the appended claims of this application.

[0029] Please refer toFigures 1 to 5 As shown, the anti-inertia impact lock of the embodiment of the present invention includes an anti-inertia impact lock mechanism and a mechanical lock paddle 1 ( Figure 1 the part indicated by the dotted line in the figure), wherein the anti-inertia impact lock mechanism includes a base 2, a lock piece 3, a lock buckle 4, a lock control rod 5 and an unlocking motor 6. The base 2 is strip-shaped, and a motor fixing position is provided at the right end of the base 2. The motor fixing position includes front and rear side plates 201. The unlocking motor 6 is fixed between the front and rear side plates 201, and the front and rear side plates 201 of the motor fixing position are locked with a cross-head screw 7 to ensure that the unlocking motor 6 is fixed in position without looseness during operation.

[0030] The middle of the base 2 is rotatably connected to the lock piece 3 through a side bracket 202. The lock buckle 4 is an annular structure located above the lock piece 3. In a preferred embodiment of the present invention, there are two side brackets 202, located on the left and right sides of the lock piece 3. The bottom of the side bracket 202 is fixed to the base 2 by screws. A bushing 8 is provided at the center of the lock piece 3. The upper part of one side bracket 202 is penetrated by a transverse cross-head screw 9. After the cross-head screw 9 penetrates into the bushing 8, it penetrates out from the upper part of the other side bracket 202, and is locked with a locknut 10 to form a rotational connection between the lock piece 3 and the base 2.

[0031] In another preferred embodiment of the present invention, an elastic member is provided between the lock piece 3 and the base 2. Specifically, the elastic member is a return torsion spring 11. The return torsion spring 11 is located between the side bracket 202 and the lock piece 3 and is sleeved on the bushing 10. One arm of the return torsion spring 11 is hooked on the edge of a side bracket 202, and the other arm of the return torsion spring 11 is hooked on a corner position of the lock piece 3. Or holes are provided on the side bracket 202 and the lock piece 3 for the arms of the return torsion spring 11 to hook and connect. In this way, the return torsion spring 11 can be torsionally deformed and store energy after the lock piece 3 rotates. After the external force that promotes the rotation and locking of the lock piece 3 is removed, the lock piece 3 can rotate reversely and reset under the action of the return torsion spring 11. In the present invention, the specific control of the rotation of the lock piece 3 by the return torsion spring 11 will be described in detail later.

[0032] Please further combine with Figures 6 to 8As shown, the circumferential edge of the locking piece 3 has two functional shapes, namely a groove opening 301 and a first tooth opening 302, and the groove opening 301 and the first tooth opening 302 are arranged at a certain distance apart. The opening of the groove opening 301 is arranged obliquely to the radial direction of the locking piece 3. The first tooth opening 302 has a first blocking surface 302a, and this first blocking surface 302a is the surface of the first tooth opening 302 away from the groove opening 301. The function of the groove opening 301 is to hook the lock catch 4 to achieve locking. The function of the first tooth opening 302 is to cooperate with the lock control rod 5 to keep the locking piece 3 in the locked state. In another preferred embodiment of the present invention, the circumferential edge of the locking piece 3 further has a second tooth opening 303, and the groove opening 301 and the second tooth opening 303 are respectively located on both sides of the circumferential direction of the first tooth opening 302. The top of the first blocking surface 302a of the first tooth opening 302 extends to the second tooth opening 303 through the edge of the circumferential arc surface 303a of the locking piece 3. The second tooth opening 303 has a second blocking surface 303b, and this second blocking surface 303b is the surface of the second tooth opening 303 away from the first tooth opening 302. The function of the first tooth opening 302 is that after the locking piece 3 is in the open state in cooperation with the lock control rod 5, the locking piece 3 cannot further rotate in the unlocking direction, preventing the locking piece 3 from over-rotating and causing the mechanism to jam.

[0033] The locking piece 3 has two rotational positions, namely a first position and a second position. The first position is as shown in Figure 4 , Figure 9 , Figure 10 , Figure 11 . This position is the open position, and the lock mechanism corresponds to the open state. The second position is as shown in Figure 3 , Figure 6 , Figure 7 , Figure 8 . This position is the locked position, and the lock mechanism corresponds to the locked state. When the locking piece 3 is in the second position, the lock catch 4 is hooked by the groove opening 301, and the lock control rod 5 is at the position of the first tooth opening 302 and contacts the first blocking surface 302a, preventing the locking piece 3 from rotating counterclockwise (in the direction shown in Figure 10 ). In the aforementioned embodiment with the return torsion spring 11, at this time, the return torsion spring 11 is twisted to generate a return elastic force, and this return elastic force makes the locking piece 3 have a tendency to rotate counterclockwise. When the locking piece 3 is in the first position, the lock catch 4 is disengaged from the groove opening 301 to unlock, and the lock control rod 5 is at the position of the second tooth opening 303 and contacts the second blocking surface 303b, preventing the locking piece 3 from rotating counterclockwise (in the direction shown in Figure 10 ). In the aforementioned embodiment with the return torsion spring 11, at this time, most of the torsional deformation of the return torsion spring 11 is reset, and a part of the return elastic force is retained, and this return elastic force makes the locking piece 3 still have a small tendency to rotate counterclockwise.

[0034] The locking lever 5 is a rod-shaped member. As mentioned above, the purpose of its position in the locking plate 3 is to cooperate with the first tooth opening 302 and the second tooth opening 303 to limit the position of the locking plate 3. A force is maintained between the locking lever 5 and the base 2 to make the locking lever 5 close to the circumferential edge of the locking plate 3, so that the locking lever 5 can be at the bottom position of the tooth opening whether in the first tooth opening 302 or the second tooth opening 303, so that it will not easily detach from the first blocking surface 302a (i.e., the back side) of the first tooth opening 302 or the second blocking surface 303b (i.e., the back side) of the second tooth opening 303. At the same time, the locking lever 5 is designed to be relatively light, and it has an inertia that is not enough to overcome the above-mentioned force to make the locking lever 5 detach from the first tooth opening 302. Even if the lock mechanism is impacted by an external force, the locking lever 5 will move to a certain extent due to its own inertia, but this movement is not enough to exceed the first blocking surface 302a, and the locking plate 3 is still kept in the second position, thereby achieving the effect of preventing the inertia impact from unlocking. In a specific preferred embodiment, the locking lever 5 is an arm of a torsion spring 12, and the above-mentioned force is the elastic force of the torsion spring 12. The locking lever 5 is installed in such a way that a horizontal protrusion 203 and a vertical side plate 204 are formed at the left end of the base 2, and the spring coil of the torsion spring 12 is sleeved on the horizontal protrusion 203, and the cross screw 16 is used to prevent the spring coil from sliding out. The torsion spring 12 has a short arm and a long arm. The short arm is bent and hooked in the mounting hole of the vertical side plate 204, and the long arm is the locking lever 5. The side bracket 202 is provided with a limit bar hole 202a, and the locking lever 5 passes through the limit bar holes 202a of the two side brackets 202 and continues to extend rightward to the top of the unlocking motor 6.

[0035] The rotating shaft of the unlocking motor 6 is connected to the locking rod 5 through a pulling assembly, and the pulling assembly includes a rotating wheel 13 and a linkage rod 14, wherein the rotating wheel 13 is fixedly connected to the rotating shaft of the unlocking motor 6, and the lower end of the linkage rod 14 is eccentrically connected to the rotating wheel 13 through a pin 15, and the linkage rod 14 is provided with a long hole 1401, and the locking rod 5 is penetrated in the long hole 1401. In this embodiment, due to size reasons, the locking rod 5 has a bending portion 501, and the locking rod 5 is set as a Z-shaped bending structure, which is not necessary. The mechanical lock paddle 1 of the anti-inertial impact lock is set at the position of the bending portion 501, and when the mechanical lock paddle 1 rotates, it can be used to press the locking rod 5 to overcome the force to unlock. It is worth mentioning that the slotted screw 7 used to fix the unlocking motor 6 constitutes a limiting mechanism, which is used to limit the downward movement distance of the locking rod 5, that is, to control the movement distance of the locking rod 5 in the direction of the counter force.

[0036] The working process of the anti-inertial impact lock is as follows:

[0037] When locking, Figure 2 Status Figure 1The state changes, the lock lever 5 is at the second tooth opening 303 of the lock plate 3. The lock buckle 4 presses the lock plate 3 downward, and the lock plate 3 is forced to rotate clockwise around the axis ( Figure 7 , 10 As shown in the figure, the lock catch 4 gradually fits into the groove 301. The reset torsion spring 11 on the lock plate 3 is deformed by the torsion force. The top of the first resistance surface 302a of the first tooth opening 302 of the lock plate 3 and the edge of the circumferential arc surface 303a between the second tooth opening 303 rotate and rub against the lock control rod 5. Until the lock control rod 5 reaches the first resistance surface 302a and enters the first tooth opening 302 under the action of its own elastic force (acting force), and is still affected by the self-elastic force (upward) of the lock control rod 5, the position of the lock plate 3 is locked, and the purpose of locking the lock catch 4 is achieved. The reset torsion spring 11 on the lock plate 3 is in a state of storing force due to deformation.

[0038] When unlocking, Figure 1 Status Figure 2 The state changes, the mechanical lock paddle 1 rotates clockwise or the unlocking motor 6 rotates, the mechanical lock paddle 1 directly presses down the bent portion 501 of the lock lever 5, and the unlocking motor 6 pulls down the linkage rod 14 through the rotation of the rotating wheel 13, thereby pulling down the bent portion 501 of the lock lever 5. Both methods give the lock lever 5 a downward force, and the torsion spring 12 of the lock lever 5 deforms and accumulates force. At the same time, the downward movement of the lock lever 5 causes it to disengage from the first tooth opening 302 of the lock plate 3, and no longer blocks the first blocking surface 302a. The reset torsion spring 11 releases the torque, and the lock plate 3 rotates counterclockwise around the axis under the elastic force of the reset torsion spring 11 ( Figure 7 , 10 The locking plate 3 is rotated as shown in the figure, and the lock catch 4 is disengaged from the groove 301 and unlocked. At the same time, the locking rod 5 is limited by the limiting mechanism (slotted screw 7) and cannot move further downward. When the locking plate 3 rotates counterclockwise, the second blocking surface 303b of the second tooth opening 303 is blocked by the locking rod 5, and the locking plate 3 does not continue to rotate. The limiting mechanism can prevent the locking rod 5 from disengaging from the second tooth opening 303 from the second blocking surface 303b.

[0039] After unlocking, the lock control rod 5 will be tightly attached to the second tooth opening 303 under the elastic force (ie, the acting force) of the torsion spring 12 and still have a tendency to rebound upwards, preparing for the next locking.

[0040] The unlocking method of the lock mechanism and lock is that the lock control rod 5 is subjected to a mechanical external force from top to bottom so that the lock control rod 5 is disengaged from the first tooth opening 302. Because the lock control rod 5 is subjected to an upward elastic force, the lock control rod 5 itself is very light, so the downward inertial force generated when it is hit by an external force is insufficient to offset its own upward elastic force. Therefore, under an inertial impact, the lock mechanism and lock will not be unlocked due to inertia.

Claims

1. A lock mechanism for preventing inertial impact, characterized in that, It includes a base, a locking piece, a lock catch, a lock control rod and an unlocking motor. The locking piece is rotatably connected to the base. Groove openings and first tooth openings are provided at intervals on the circumferential edge of the locking piece. The groove openings are used to hook the lock catch. The lock control rod is connected to the base. The lock control rod is subjected to a force, and this force makes the lock control rod approach the circumferential edge of the locking piece. The rotating shaft of the unlocking motor is connected to the lock control rod through a pulling component. When the locking piece rotates, it has a first position and a second position. When the locking piece is in the first position, the lock catch disengages from the groove opening to unlock. When the locking piece is in the second position, the lock catch is hooked and locked by the groove opening. When the lock control rod is at the first tooth opening, the locking piece is in the second position and the lock control rod restricts the locking piece from turning from the second position to the first position. When the rotating shaft rotates, the pulling component pulls the lock control rod out of the first tooth opening. The lock control rod has an inertia that is not sufficient to overcome the force to make the lock control rod disengage from the first tooth opening. The lock control rod is the arm of a torsion spring, and the force is the elastic force of the torsion spring. An elastic member is provided between the locking piece and the base, and the elastic member makes the locking piece tend to rotate from the second position to the first position.

2. The anti-inertia impact lock mechanism according to claim 1, characterized in that, A side bracket is provided on the base. The locking piece is rotatably connected to the side bracket. A limiting strip hole is provided on the side bracket, and the lock control rod is inserted into the limiting strip hole.

3. The lock mechanism for preventing inertial impact according to claim 2, characterized in that, The side brackets are arranged on both sides of the locking piece.

4. The anti-inertia impact lock mechanism according to claim 1, characterized in that, A second tooth opening is provided on the circumferential edge of the locking piece. The groove opening and the second tooth opening are respectively located on both sides of the first tooth opening in the circumferential direction. When the lock control rod is at the second tooth opening, it restricts the locking piece from rotating in the direction of turning from the first position to the second position.

5. The lock mechanism for preventing inertial shock according to claim 1, characterized in that, The base is provided with a limiting mechanism, and the limiting mechanism is used to limit the moving distance of the lock control rod against the direction of the force.

6. A lock, characterized in that, It includes the anti-inertia impact lock mechanism according to any one of claims 1 to 5 and a mechanical lock pusher, and the mechanical lock pusher is used to press the lock control rod to overcome the force for unlocking.

7. The lock according to claim 6, characterized in that, The pulling component includes a runner and a linkage rod. The runner is connected to the rotating shaft of the unlocking motor, the linkage rod is eccentrically connected to the runner, a long hole is provided on the linkage rod, and the lock control rod is inserted into the long hole.

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