Anti-false lock mechanism and door lock thereof

Abstract

The present invention provides an anti-false lock mechanism, comprising a transmission gear, a sliding rod, a locking member and a first elastic member; a part of the outer peripheral surface of the transmission gear is set as an arc surface; the end of the sliding rod is in contact with the lock tongue of the lock body, and a fixed stopper and a second elastic member are arranged on the sliding rod, and when the lock tongue is retracted, the sliding rod is driven to overcome the elastic force of the second elastic member; when the lock tongue is extended, the sliding rod drives the locking member to move to block the rotational movement of the rotating part; the first elastic member comprises a first protrusion and a second protrusion, and only when the first protrusion contacts the arc surface, the second protrusion hinders the sliding movement of the fixed stopper, so as to hinder the locking member from moving to block the rotational movement of the rotating part. The present invention can effectively ensure the locking state of the upper and lower brake pins when the door lock is in the locked state, thereby improving the safety performance of the door lock and the user experience.

Description

Technical Field

[0001] The invention belongs to the technical field of locks, and in particular relates to an anti-false lock mechanism and a door lock thereof. Background Art

[0002] The sky and earth lock is a lock that can lock the upper and lower brake latches (i.e. the corresponding sky lock and ground lock) when closing the lock. Its general working principle is as follows: when opening the door, use the key to open the lock cylinder, the square tongue retracts, press the handle down to a certain angle, the oblique tongue retracts, and at the same time drives the upper and lower brake latches to retract, the door is opened, and after releasing the handle, the oblique tongue extends and the handle can return to its position; when locking the door, lift the handle to a certain angle, drive the upper and lower brake latches to extend, use the key or operate the hand button indoors to lock the lock cylinder, the square tongue extends and locks, the door is locked, and after releasing the handle, the handle can return to its position. Since the door is restricted by the upper and lower brake latches, square tongue and oblique tongue at the same time when it is locked, it has better security.

[0003] However, the existing floor and ceiling locks have a false lock phenomenon when the upper and lower brake pins are extended and locked, that is, the upper and lower brake pins are not fully extended when the handle is lifted. At this time, when the handle is pressed down, the locking state of the upper and lower brake pins can be released, which greatly reduces the safety protection of the door lock and the user experience. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an anti-false lock mechanism and a door lock thereof, which can effectively ensure the locking state of the upper and lower brake pins when the door lock is in the locked state, thereby improving the safety performance of the door lock and the user's experience.

[0005] The technical solution adopted by the present invention to solve the technical problem is:

[0006] An anti-false lock mechanism comprises a transmission gear, a sliding rod, a locking member and a first elastic member arranged on a lock body;

[0007] The transmission gear is in transmission connection with the rotating part of the lock body on which the handle is installed to drive the upper brake pin and the lower brake pin of the lock body to perform locking / unlocking movement, and part of the outer peripheral surface of the transmission gear is set as an arc surface, and the distance from the arc surface to the center of the rotating shaft of the transmission gear is greater than the distance from the tooth top of the transmission gear to the center of the rotating shaft of the transmission gear;

[0008] The sliding rod can be slidably arranged relative to the lock body and the end thereof is in contact with the lock tongue of the lock body. A fixed stopper and a second elastic member are arranged on the sliding rod. When the lock tongue retracts, the sliding rod is driven to overcome the elastic force of the second elastic member.

[0009] The locking member is in transmission connection with the sliding rod, and when the locking tongue is extended, the sliding rod drives the locking member to move to block the rotational movement of the rotating part;

[0010] The first elastic member includes a first protrusion for contacting the arc surface and a second protrusion for contacting the fixed stopper, and only when the first protrusion contacts the arc surface, the second protrusion hinders the sliding movement of the fixed stopper with the sliding rod, so as to hinder the locking member from moving to block the rotational movement of the rotating part.

[0011] Preferably, a guide surface is obliquely provided at the contact point between the sliding rod and the locking tongue.

[0012] Preferably, the locking member comprises a first side portion and a second side portion connected at an angle, a positioning column is protruded at the connection between the first side portion and the second side portion, and the locking member is swingably disposed on the lock body via the positioning column.

[0013] Preferably, the sliding rod is provided with a pair of protruding limit posts, and a clamping space is formed between the pair of limit posts;

[0014] The first edge portion extends into the clamping space so that the locking member swings as the sliding rod slides; a protrusion is fixedly provided on the rotating portion, and when the second elastic member is in a natural state, the second edge portion swings to below the rotation trajectory of the protrusion and abuts against the protrusion.

[0015] Preferably, when the second elastic member is in a natural state, the straight line where the second edge portion is located is tangent to the rotation trajectory of the protrusion.

[0016] Preferably, the first protrusion and the second protrusion are oriented in opposite directions.

[0017] Preferably, the rotating part comprises a body and a plurality of driving gear blocks rotatable relative to the body;

[0018] The body is provided with a mounting hole for mounting the handle, and a third elastic member is provided between the body and the lock body for resetting the body after rotation;

[0019] A driven gear is coaxially arranged on the transmission gear, and the driving gear block is meshed and connected with the driven gear.

[0020] Preferably, a first rack is arranged at one end of the upper brake pin extending into the lock body, a second rack is arranged at one end of the lower brake pin extending into the lock body, and a synchronous gear is meshed between the first rack and the second rack;

[0021] The transmission gear is meshedly connected with the first rack or the second rack.

[0022] Preferably, the main body is provided with a mounting groove for mounting the third elastic member, and a first opening and a second opening communicating with the mounting groove and being staggered;

[0023] Two ends of the third elastic member extend out from the first opening and the second opening respectively and abut against two sides of a fixed structure arranged on the lock body.

[0024] A door lock comprises the anti-false lock mechanism as described above.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] In this scheme, a transmission gear, a first elastic member and a sliding rod are provided, and a fixed stopper and a locking member connected to the sliding rod in transmission are provided on the sliding rod. At the same time, an arc surface is cleverly provided on the transmission gear, so that when the lock body is locked, such as lifting the handle, the rotating part drives the transmission gear to rotate, and the transmission gear drives the upper and lower brake pins to extend and lock; because during the locking operation, the lock tongue abutting against the sliding rod is in an extended state, the second elastic member returns to a natural state and drives the sliding rod to perform a reset movement. At this time, if the locking is successfully performed, the locking member will move The arc surface is in a state of abutting against the first protrusion of the first elastic member, so that the second protrusion presses against the fixed block, and the locking member cannot swing to hinder the movement of the rotating member. At this time, the user can still press the handle down, so that the lock body is in a state of virtual lock. At this time, it only needs to continue to lift the handle so that the first protrusion completely passes the contact with the arc surface to realize the locking operation of the lock body again. This solution has a compact structure and a clever design. The virtual lock state can be effectively determined and resolved through the mutual linkage between the various components, and the entire operation is simple and convenient. While greatly improving the safety performance of the door lock, it also improves the user's experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0028] Figure 1 It is a schematic diagram of the internal structure of the present invention when it is in an unlocked state.

[0029] Figure 2 for Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0030] Figure 3 It is a schematic diagram of the internal structure of the present invention when it is in a locked state.

[0031] Figure 4 for Figure 3 Schematic diagram of the enlarged structure at point B in the middle.

[0032] Figure 5 It is a structural schematic diagram of the sliding rod of the present invention.

[0033] Figure 6 It is a structural schematic diagram of the rotating part of the present invention.

[0034] in:

[0035] 1-lock body, 11-transmission gear, 111-arc surface, 12-sliding rod, 121-fixed stopper, 122-second elastic member, 123-guide surface, 124-limiting column, 13-locking member, 131-first side, 132-second side, 133-positioning column, 14-first elastic member, 141-first protrusion, 142-second protrusion, 15-rotating portion, 151-bump, 152-body, 1521-mounting hole, 1522-mounting groove, 1523-first opening, 1524-second opening, 153-driving tooth block, 16-upper brake pin, 161-first rack, 17-lower brake pin, 171-second rack, 18-lock tongue, 19-third elastic member, 20-synchronizing gear. DETAILED DESCRIPTION

[0036] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present invention, and the embodiments described are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present invention.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0038] Example 1

[0039] like Figure 1-6 As shown, an anti-false lock mechanism is provided in this embodiment, which mainly includes a transmission gear 11, a sliding rod 12, a locking member 13 and a first elastic member 14 arranged on the lock body 1.

[0040] Specifically, the transmission gear 11 is in transmission connection with the rotating part 15 on the lock body 1 for mounting the handle to drive the upper brake pin 16 and the lower brake pin 17 of the lock body 1 to perform locking / unlocking movements, and part of the outer peripheral surface of the transmission gear 11 is set as an arc surface 111, and the distance from the arc surface 111 to the center of the rotating shaft of the transmission gear 11 is greater than the distance from the tooth top of the transmission gear 11 to the center of the rotating shaft of the transmission gear 11, so as to ensure effective contact between the arc surface 111 and the first elastic member 14. In this embodiment, the arc length of the arc surface 111 is adapted to the extended length of the upper brake pin 16 and the lower brake pin 17 when locked, and the judgment distance in the virtual lock state is controlled by setting the arc length of the arc surface 111.

[0041] The sliding rod 12 can be slidably arranged on the lock body 1 relative to the lock body 1, and the end of the sliding rod 12 is in contact with and connected to the lock tongue 18 of the lock body 1. A fixed block 121 and a second elastic member 122 are also arranged on the sliding rod 12. When the lock tongue 18 retracts, it drives the sliding rod 12 to overcome the elastic force of the second elastic member 122.

[0042] In this embodiment, the square tongue of the lock body 1 is in contact with the sliding rod 12, one end of the sliding rod 12 is in contact with the square tongue, and the second elastic member 122 is arranged at the other end of the sliding rod 12, where the second elastic member 122 is a spring; obviously, the second elastic member 122 can also be arranged at the end of the sliding rod 12 that is in contact with the square tongue, and in this case, the second elastic member 122 is selected to be set as a tension spring.

[0043] As a preferred solution, a guide surface 123 is obliquely provided at the contact point between the sliding rod 12 and the locking tongue 18. In this embodiment, the guide surface 123 is provided at the end of the sliding rod 12 so that the sliding rod 12 can be lifted more smoothly when the locking tongue 18 is retracted; in actual applications, it is also possible to consider providing the guide surface 123 on the locking tongue 18, which will not be described in detail here.

[0044] The locking member 13 is in transmission connection with the sliding rod 12 . When the locking tongue 18 is extended, the second elastic member 122 returns to a natural state to drive the sliding rod 12 to slide. At this time, the sliding rod 12 drives the locking member 13 to move to block the rotation of the rotating part 15 .

[0045] As a preferred solution, the side view of the locking member 13 is "L"-shaped or "V"-shaped, including a first side portion 131 and a second side portion 132 connected at an angle, and a positioning column 133 is protruded at the connection between the first side portion 131 and the second side portion 132, and the locking member 13 is swingably set on the lock body 1 through the positioning column 133.

[0046] In addition, the sliding rod 12 is provided with a pair of protruding limiting posts 124, and a clamping space is formed between the pair of limiting posts 124; the first side portion 131 extends into the clamping space so that the locking member 13 swings along with the sliding of the sliding rod 12. Specifically, a protrusion 151 is fixedly provided on the rotating part 15, and when the second elastic member 122 is in a natural state, the locking member 13 moves along with the movement of the sliding rod 12, so that the second side portion 132 swings to below the rotation track of the protrusion 151 and abuts against the protrusion 151 to hinder the rotation movement of the rotating part 15. In this embodiment, the limiting post 124 is set as a cylinder to further improve the movement coordination between the sliding rod 12 and the locking member 13.

[0047] As a preferred solution, when the second elastic member 122 is in a natural state, the straight line on which the second edge portion 132 is located is tangent to the rotation trajectory of the protrusion 151; this is to further improve the locking protection of the rotating portion 15, avoid the situation where excessive force is applied to the handle, causing the locking member 13 to be reversely driven to drive the sliding rod 12 to move and unlock, further improve the reliability of the mechanism, and avoid premature damage to components due to misoperation.

[0048] The first elastic member 14 includes a first protrusion 141 for contacting the arc surface 111 and a second protrusion 142 for contacting the fixed stopper 121, and the first protrusion 141 and the second protrusion 142 are protruded in opposite directions. Only when the first protrusion 141 contacts the arc surface 111, the second protrusion 142 blocks the sliding movement of the fixed stopper 121 along with the sliding rod 12, so as to block the locking member 13 from moving to block the rotation movement of the rotating portion 15.

[0049] Furthermore, the rotating part 15 includes a main body 152 and a plurality of driving tooth blocks 153 that can rotate relative to the main body 152, and the protrusion 151 is arranged on the main body 152; the main body 152 is provided with a mounting hole 1521 for mounting the handle, and in this embodiment, the mounting hole 1521 is preferably set to have a polygonal cross-section; a third elastic member 19 is provided between the main body 152 and the lock body 1 for resetting the main body 152 after rotation; a driven gear is coaxially arranged on the transmission gear 11, and one of the driving tooth blocks 153 is meshed and connected with the driven gear.

[0050] As a preferred solution, a first rack 161 is provided at one end of the upper brake pin 16 extending into the lock body 1, and a second rack 171 is provided at one end of the lower brake pin 17 extending into the lock body 1, and a synchronous gear 20 is meshed between the first rack 161 and the second rack 171; the transmission gear 11 is meshed and connected with the first rack 161 or the second rack 171.

[0051] In addition, the body 152 is provided with a mounting groove 1522 for mounting the third elastic member 19, and a first opening 1523 and a second opening 1524 which are connected to the mounting groove 1522 and are staggered; in this embodiment, the third elastic member 19 is a torsion spring. The two ends of the third elastic member 19 extend out from the first opening 1523 and the second opening 1524 respectively and abut against the two sides of the fixed structure disposed on the lock body 1.

[0052] In this embodiment, a door lock is also provided, including the lock body 1 and the above-mentioned anti-false lock mechanism.

[0053] Other structural forms of the door lock described in this embodiment can be found in the prior art and will not be described in detail here.

[0054] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Therefore, any modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. An anti-false lock mechanism, characterized in that: It includes a transmission gear, a sliding rod, a locking member and a first elastic member arranged on the lock body; The transmission gear is in transmission connection with the rotating part of the lock body on which the handle is installed to drive the upper brake pin and the lower brake pin of the lock body to perform locking / unlocking movement, and part of the outer peripheral surface of the transmission gear is set as an arc surface, and the distance from the arc surface to the center of the rotating shaft of the transmission gear is greater than the distance from the tooth top of the transmission gear to the center of the rotating shaft of the transmission gear; The sliding rod can be slidably arranged relative to the lock body and the end thereof is in contact with the lock tongue of the lock body. A fixed stopper and a second elastic member are arranged on the sliding rod. When the lock tongue retracts, the sliding rod is driven to overcome the elastic force of the second elastic member. The locking member is in transmission connection with the sliding rod, and when the locking tongue is extended, the sliding rod drives the locking member to move to block the rotational movement of the rotating part; The first elastic member includes a first protrusion for contacting the arc surface and a second protrusion for contacting the fixed stopper, and only when the first protrusion contacts the arc surface, the second protrusion blocks the sliding movement of the fixed stopper along with the sliding rod, so as to block the locking member from moving to block the rotational movement of the rotating part; A guide surface is obliquely provided at the contact point between the sliding rod and the locking tongue; The first protrusion and the second protrusion are oriented in opposite directions.

2. The anti-false lock mechanism according to claim 1, characterized in that: The locking member comprises a first side portion and a second side portion connected at an angle, a positioning column is protruded at the connection between the first side portion and the second side portion, and the locking member is swingably arranged on the lock body through the positioning column.

3. The anti-false lock mechanism according to claim 2, characterized in that: The sliding rod is provided with limit posts protruding in pairs, and a clamping space is formed between the limit posts provided in pairs; The first edge portion extends into the clamping space so that the locking member swings as the sliding rod slides; a protrusion is fixedly provided on the rotating portion, and when the second elastic member is in a natural state, the second edge portion swings to below the rotation trajectory of the protrusion and abuts against the protrusion.

4. The anti-false lock mechanism according to claim 3, characterized in that: When the second elastic member is in a natural state, the straight line where the second edge portion is located is tangent to the rotation trajectory of the protrusion.

5. An anti-false lock mechanism according to any one of claims 1, 3-4, characterized in that: The rotating part includes a main body and a plurality of driving gear blocks that can rotate relative to the main body; The body is provided with a mounting hole for mounting the handle, and a third elastic member is provided between the body and the lock body for resetting the body after rotation; A driven gear is coaxially arranged on the transmission gear, and the driving gear block is meshed and connected with the driven gear.

6. The anti-false lock mechanism according to claim 5, characterized in that: One end of the upper brake pin extending into the lock body is provided with a first rack, and one end of the lower brake pin extending into the lock body is provided with a second rack, and a synchronous gear is meshed between the first rack and the second rack; The transmission gear is meshedly connected with the first rack or the second rack.

7. The anti-false lock mechanism according to claim 5, characterized in that: The main body is provided with a mounting groove for mounting the third elastic member, and a first opening and a second opening which are communicated with the mounting groove and are staggered; Two ends of the third elastic member extend out from the first opening and the second opening respectively and abut against two sides of a fixed structure arranged on the lock body.

8. A door lock, characterized in that: It comprises an anti-false lock mechanism as described in any one of claims 1 to 7.

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