A door lock locking mechanism and a door lock

Abstract

The present invention discloses a door lock mechanism and a door lock thereof. The door lock mechanism includes: a latch bolt mechanism; an interlocking assembly arranged between a lock housing and the latch bolt mechanism, which locks the latch bolt mechanism in a locked-out position to restrict the latch bolt mechanism from moving in a locked-in direction by locking the two, and unlocks the latch bolt mechanism by releasing the two; a driving and holding assembly arranged between the interlocking assembly and a dial wheel of a lock cylinder, which drives the interlocking assembly to switch between a locked state and an unlocked state upon being triggered by an unlocking operation or a locking operation, and limits the interlocking assembly to the unlocked state or the locked state; and a transmission mechanism arranged between a handle shaft of a handle and the latch bolt mechanism, which can drive the latch bolt mechanism to move toward a locked-in position. The door lock mechanism of the present invention has a simple structure, a small number of components, low manufacturing and installation costs, simple transmission, and smoother operation.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical locks, and in particular to a door lock locking mechanism and a door lock thereof. Background Art

[0002] Door locks are generally categorized as electronic or mechanical, depending on the unlocking method. Mechanical door locks are typically unlocked or locked using a key that works with the lock. Traditional mechanical door locks typically feature a latch bolt mechanism and a safety bolt. The latch bolt mechanism, controlled by a handle, simply positions the door leaf and locks it to the door frame, but does not act as a deadbolt. The safety bolt is typically designed as a square bolt and works in conjunction with the lock cylinder to provide a safety function. The key can be used to open or close the safety bolt, causing it to retract or extend into the lock body. During use, the safety bolt must first be retracted into the lock body and opened. The handle can then be used to retract the bolt mechanism, unlocking the door leaf.

[0003] The above-mentioned mechanical door lock which needs to add a safety lock tongue such as a square tongue to realize the function of locking the door leaf not only has the problems of complex transmission relationship between components, complex structure of individual components, and high manufacturing cost.

[0004] Prior art door locks also have anti-lock mechanisms that restrict the locking action of the bolt plate when locked out, thereby preventing the use of the latch bolt mechanism to prevent illegal opening. Typically, this anti-lock mechanism is located on the inside of the door leaf, and the latch plate can be directly released by twisting the handle. However, when the door needs to be unlocked from the outside, a clutch device is required between the outdoor handle and the indoor handle to control the rotation of the indoor handle or the outdoor handle.

[0005] While this prior art anti-lock mechanism can eliminate the aforementioned safety bolt and still overcome the drawback of the latch bolt mechanism, which is susceptible to unauthorized opening, it still requires a clutch device between the exterior and interior handles to control whether the interior and exterior handles rotate together or separately. This makes the structure relatively complex for a relatively simple door lock that only has a latch bolt mechanism. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the prior art in terms of complex transmission relationship and complex structure.

[0007] To this end, an embodiment of the present invention provides a door lock locking mechanism, which includes:

[0008] a latch bolt mechanism movably mounted in the lock housing between a locked position and a locked-out position and biased toward the locked-out position by a lock-out reset member acting between the lock housing and the latch bolt mechanism;

[0009] An interlocking assembly is provided between the lock housing and the latch bolt mechanism, and is configured to lock the latch bolt mechanism in a locked-out position to restrict movement of the latch bolt mechanism in a locked-in direction by locking the two together, and to unlock the latch bolt mechanism by releasing the locking of the two together;

[0010] A drive and holding assembly is provided between the interlock assembly and the dial of the lock cylinder, and drives the interlock assembly to switch between the locked state and the unlocked state when triggered by an unlocking operation or a locking operation, and limits the interlock assembly to remain in the unlocked state or the locked state;

[0011] The transmission mechanism is arranged between the handle shaft of the handle and the latch bolt mechanism, and can drive the latch bolt mechanism to move toward the locked position.

[0012] Optionally, the interlocking assembly includes:

[0013] a first limiting member, fixedly disposed on the lock housing;

[0014] The linkage member is mounted on the latch bolt mechanism with a limited locking direction, and can move relative to the latch bolt mechanism between a locked position that cooperates with the first limiting member to achieve a locked state and an unlocked position that disengages from the first limiting member to achieve an unlocked state.

[0015] Optionally, the linkage member is provided with a limiting structure for cooperating with the first limiting member; the limiting structure is combined with the first limiting member to achieve a locked state; the limiting structure is disengaged from the first limiting member to achieve an unlocked state;

[0016] The limiting structure is limited to being engaged with or disengaged from the first limiting member in a direction forming an angle with the locking direction.

[0017] Optionally, the limiting structure is a retaining groove formed on the linkage member;

[0018] The first limiting member is a limiting pin that can be embedded in or moved out of the stopping groove during the rotation of the linkage member.

[0019] Optionally, the linkage member is further formed with a first sliding groove for slidingly cooperating with the first limiting member in the locking and unlocking directions when the linkage member is in the unlocking position;

[0020] The first sliding groove is connected to the retaining groove, and the linkage member can be rotated between the locking position and the unlocking position so that the first limiting member can switchably enter and exit between the retaining groove and the first sliding groove;

[0021] The latch mechanism includes a latch bracket for mounting a latch assembly and being slidably mounted in the lock housing. A second sliding groove is formed on the latch bracket, which can slideably cooperate with the first limiting member in the locking and unlocking directions. The latch bracket is slidably limited on the lock housing through the cooperation between the second sliding groove and the first limiting member.

[0022] Optionally, the linkage is pivotally connected to the latch tongue holder around a first rotation axis.

[0023] Optionally, one of the linkage member and the latch tongue holder is provided with an arc-shaped first limiting groove with the first rotation axis as the center, and the other of the linkage member and the latch tongue holder is provided with a second limiting member adapted to engage with the side walls at both ends of the first limiting groove;

[0024] The linkage member is suitable for limiting the linkage member within a preset rotation range through the blocking and limiting of the first limiting groove and the second limiting member.

[0025] Optionally, the drive holding assembly includes:

[0026] The transmission member has a first end acted upon by the thumbwheel of the lock core and a second end acted upon by the linkage member; the transmission member is acted upon by the thumbwheel of the lock core and is movably installed in the lock housing, and the linkage member is driven to switch between a locked state and an unlocked state through the movement of the transmission member.

[0027] Optionally, the transmission member is pivotally connected to the lock housing around a second rotation axis.

[0028] Optionally, a limiting assembly and an elastic retaining member are provided between the transmission member and the lock housing;

[0029] The limiting assembly is used to limit the rotation of the transmission member between a first limit position and a second limit position; the transmission member is movably installed in the lock housing between the first limit position and the second limit position, and in the first limit position, the transmission member drives the linkage member to be in a locked state, and in the second limit position, the transmission member drives the linkage member to be in an unlocked state;

[0030] The elastic retaining member is used to retain the transmission member at a first limit position or a second limit position.

[0031] Optionally, the limiting assembly includes a third limiting member fixedly provided on the lock housing, and a second limiting groove correspondingly provided on the transmission member; the second limiting groove is an arc-shaped groove with the second rotation axis as the center and is limitedly engaged with the third limiting member;

[0032] The elastic retaining member is an elastic retaining spring arranged between the third limit member and the transmission member. The torque of the biasing force applied by the elastic retaining spring between the third limit member and the transmission member on the second rotation axis is suitable for maintaining the transmission member in this position when it rotates to the first extreme position and the second extreme position.

[0033] The elastic retaining member is an elastic clip arranged on the transmission member and suitable for cooperating with the third limit member. The elastic clip has two resisting parts; one of the resisting parts is used to elastically resist on the third limit member when the transmission member rotates to the first limit position to limit its rotation toward the second limit position; the other resisting part is used to elastically resist on the third limit member when the transmission member rotates to the second limit position to limit its rotation toward the first limit position.

[0034] Optionally, a driving pin adapted to slideably cooperate with the linkage member is provided on the second end of the transmission member, and a third sliding groove is correspondingly provided on the linkage member, and the transmission member slides along the third sliding groove via the driving pin to drive the linkage member to rotate between the locked position and the unlocked position;

[0035] When the linkage member is located at the locking position, the driving pin and the third sliding slot are in a self-locking relationship, so that the linkage member cannot rotate to the unlocking position by itself.

[0036] Optionally, the transmission mechanism includes:

[0037] The handle pick is fixedly installed on the handle shaft;

[0038] A transmission plate is hinged on the lock housing, one end of which is engaged with the handle paddle teeth for transmission cooperation, and the other end is suitable for acting on the latch bolt mechanism, and is suitable for transmitting the torque applied by the handle on the handle shaft to the latch bolt mechanism and converting it into a thrust in the locking direction to overcome the biasing force of the latch bolt mechanism towards the locked-out position.

[0039] Optionally, the latch bolt mechanism comprises a latch bolt frame for mounting the latch bolt assembly and slidably mounted in the lock housing, and a crank arm cooperating with the transmission plate is formed on the latch bolt frame.

[0040] Optionally, the transmission mechanism further includes:

[0041] A transmission reset member, one end of which is connected to the transmission plate and the other end is installed on the lock housing. The transmission reset member is used to apply a biasing force to the transmission plate. Under the action of the biasing force, the transmission plate drives the handle paddle to tend to disengage from the action of the latch mechanism.

[0042] The technical solution of the present invention has the following advantages:

[0043] 1. In the embodiment of the present invention, the operating principle of the door lock mechanism is as follows:

[0044] Unlocking and door opening operation: When the linkage is in the unlocking position, the handle is rotated forward, and the handle paddle installed on the handle shaft rotates. The rotation of the handle paddle drives the transmission plate engaged with it to rotate, and the action arm on the transmission plate moves and abuts against the crank arm of the latch bolt holder, and applies a thrust in the locking direction to the crank arm. Under the action of this thrust, the latch bolt holder can slide in the locking direction along the positional relationship between the limit pin and the first slide groove and the second slide groove. At this time, the latch bolt mechanism retracts into the lock housing, and the unlocking and door opening action is completed.

[0045] When the door opening operation on the handle is released, the transmission reset member applies a biasing force to the transmission plate under the action of its own elastic force. Under the action of the biasing force, the transmission plate rotates and resets to the handle pick on it, tending to disengage from the action of the upper crank arm of the latch bolt frame. When the transmission plate rotates and resets, it drives the handle pick engaged with it to rotate and reset, so that the handle rotates and resets in the opposite direction. At the same time, when the latch bolt mechanism retracts into the housing, the lock-out reset member is compressed and deformed and applies a biasing force tending to the lock-out direction to the latch bolt frame under the action of its own elastic force. Since the handle pick no longer applies a force to the upper crank arm of the latch bolt frame, the latch bolt frame can move in the lock-out direction to the locked position under the elastic force of the lock-out reset member.

[0046] Locking operation: When the latch bolt mechanism is in the locked-out position, a key is inserted into the lock cylinder and turned, causing the lock cylinder's dial to act on the first end of the transmission member, driving the transmission member to rotate about the second rotation axis to the first limit position. The second end of the transmission member then drives the linkage member to rotate about the first rotation axis in the first direction to the locked position, causing the limit pin to engage with the stop groove. The stop groove then extends in a direction at an angle to the locking and unlocking direction. The limit pin engages with the stop groove to lock the lock housing and the latch bolt frame, thereby locking the latch bolt mechanism in the locked-out position and restricting movement of the latch bolt mechanism in the locked-in direction. At this point, turning the handle cannot drive the latch bolt mechanism to retract into the lock housing.

[0047] Unlocking operation: When the latch bolt mechanism is in the locked position, a key is inserted into the lock cylinder and turned in the direction opposite to the locking operation so that the dial of the lock cylinder acts on the first end of the transmission member to drive the transmission member to rotate around the second rotation axis to the second extreme position, and the linkage member rotates around the first rotation axis in a second direction opposite to the first direction to the unlocked position, so that the limit pin moves out of the stop groove and disengages from the stop groove to release the lock between the lock housing and the latch bolt frame, so that the linkage member reaches the aforementioned unlocked state. At this time, the latch bolt mechanism is not restricted by the interlocking component and can perform the above-mentioned unlocking and door opening operation.

[0048] 2. The interlocking assembly of the present invention has a simple structure and low manufacturing and installation costs. By rotating the linkage member, the limit pin and the stop groove can be combined to lock the lock housing and the latch bracket, and the locking is firm.

[0049] 3. In this embodiment of the present invention, the drive-holding assembly includes interconnected transmission members, a limiter assembly, and an elastic retaining assembly. Through the interlocking relationship between these components, the drive-holding assembly, triggered by an unlocking or locking operation, drives the interlock assembly to switch between locked and unlocked states, and limits and maintains the interlock assembly in the unlocked or locked state. The drive-holding assembly has a simple structure, a small number of components, low manufacturing and installation costs, simple transmission, and smoother locking and unlocking operations.

[0050] 4. In an embodiment of the present invention, when the linkage is in the locked position, the drive pin and the third slot are in a self-locking relationship, preventing the linkage from rotating to the unlocked position on its own, thereby improving the stability of the linkage in the locked position. The third slot on the linkage is arranged parallel to the first slot. When the linkage is in the unlocked position, the lengths of the third slot and the first slot are both parallel to the locking and unlocking directions. Opening the door by hand can drive the linkage and the latch bolt mechanism to move in the locking and unlocking directions. At this time, the third slot can move relative to the drive pin, and the drive pin will not hinder the movement of the linkage and the latch bolt mechanism in the locking and unlocking directions.

[0051] 5. In the embodiment of the present invention, the handle paddle and the transmission plate are gear-engaged, the transmission is stable and reliable, the handle door opening operation is relatively smooth, and the impact and noise can be reduced.

[0052] In a second aspect, in order to achieve the above-mentioned purpose, an embodiment of the present invention further provides a door lock, which includes the door lock locking mechanism described in any one of the aforementioned embodiments.

[0053] Beneficial effects:

[0054] The door lock provided by the present invention includes the aforementioned door lock locking mechanism, wherein the technical advantages and effects achieved by the door lock also include the technical advantages and effects achieved by the door lock locking mechanism, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0056] Figure 1 This is an axonometric view of the door lock mechanism of the present invention when the interlock assembly is in the unlocked state and the handle is not being opened;

[0057] Figure 2This is a front view of the door lock mechanism of the present invention when the interlock assembly is in the unlocked state and the handle is not opened;

[0058] Figure 3 This is an axonometric view of the door lock mechanism of the present invention when the interlock assembly is in the unlocked state and the handle is rotated to open the door;

[0059] Figure 4 This is a front view of the door lock mechanism of the present invention when the interlock assembly is in the unlocked state and the handle is rotated to open the door;

[0060] Figure 5 This is an axonometric view of the door lock locking mechanism of the present invention when the interlocking assembly is in a locked state;

[0061] Figure 6 This is a front view of the door lock locking mechanism of the present invention when the interlocking assembly is in a locked state;

[0062] Figure 7 This is a front view of the door lock mechanism in the second embodiment of the present invention.

[0063] Description of reference numerals:

[0064] 1. Lock case; 11. Lock cylinder; 12. Handle;

[0065] 2. Latch mechanism; 21. Latch assembly; 22. Latch holder; 221. Second chute; 222. Crank arm;

[0066] 3. Interlocking assembly; 31. Limit pin; 32. Linkage member;

[0067] 321, pivot rivet; 322, stop groove; 323, first slide groove; 324, first limiting groove; 325, second limiting member; 326, third slide groove;

[0068] 4. Drive holding assembly;

[0069] 41. Transmission member; 411. Pivot solenoid; 412. Drive pin;

[0070] 42. Limiting assembly; 421. Limiting screw; 422. Arc groove;

[0071] 431. Elastic retaining spring; 432. Elastic buckle;

[0072] 5. Transmission mechanism; 51. Handle paddle; 52. Transmission plate; 521. Third rotation axis; 53. Transmission reset member;

[0073] 6. Lock out the reset piece. DETAILED DESCRIPTION

[0074] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0075] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0076] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0077] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0078] like Figures 1 to 6 In the embodiment shown, it should be noted that Figure 1 The direction indicated by the middle arrow is the locking direction of the latch bracket 22 in the lock housing 1; Figure 3 The direction indicated by the arrow is the locking direction.

[0079] An embodiment of the present invention provides a door lock mechanism, comprising a latch bolt mechanism 2, an interlock assembly 3, a drive and retention assembly 4, and a transmission mechanism 5. The latch bolt mechanism 2 includes a latch bolt assembly 21 and a latch bolt holder 22 for mounting the latch bolt assembly 21 and slidably mounted within a lock housing 1 between a locked position and a locked-out position. The lock housing 1 is provided with a lock-out reset member 6 for biasing the latch bolt mechanism 2 toward the locked-out position. Optionally, the lock-out reset member 6 is a torsion spring, the central portion of which is sleeved on a solenoid fixed to the lock housing 1. One end of the torsion spring abuts against an end surface of the lock housing 1 distal from the latch bolt assembly 21, while the other end abuts against the latch bolt holder 22. When the latch bolt mechanism 2 moves in the locking direction and retracts into the lock housing 1, the torsion spring is subjected to torque deformation by the latch bolt holder 22. Under its own elastic force, the torsion spring biases the latch bolt holder 22 toward the locked-out position.

[0080] The interlock assembly 3 is disposed between the lock housing 1 and the latch bolt mechanism 2 and includes a linkage member 32 riveted to the latch bolt frame 22 via a pivot rivet 321. The linkage member 32 is rotatable about the central axis of the pivot rivet 321, i.e., about the first rotation axis. In this embodiment, the linkage member 32 is provided with a first arc-shaped limiting groove 324 centered on the first rotation axis. The latch bolt frame 22 is provided with second limiting members 325 that engage with the sidewalls of the first limiting groove 324. With this arrangement, when the linkage member 32 reaches its limit position during rotation about the first rotation axis, the sidewalls of the first limiting groove 324 on the linkage member 32 abut against the second limiting members 325, restricting further rotation of the linkage member 32 and thereby limiting rotation of the linkage member 32 within a predetermined angular range. Alternatively, the first limiting groove 324 may be provided on the latch bolt frame 22, with the second limiting members 325 correspondingly mounted on the linkage member 32. Optionally, the second limiting member 325 is a rivet.

[0081] The interlock assembly 3 also includes a limit pin 31 fixed to the lock housing 1 as a first limit member, and a retaining groove 322 formed on the linkage member 32 as a limit structure for engaging with the limit pin 31. The limit pin 31 can be inserted into or removed from the retaining groove 322 during the rotation of the linkage member 32. The linkage member 32 also has a first sliding groove 323 formed therein, which allows it to slide with the limit pin 31 in the locking and unlocking directions when in the unlocked position. The first sliding groove 323 is connected to the retaining groove 322, allowing the limit pin 31 to switch between the retaining groove 322 and the first sliding groove 323 during the rotation of the linkage member 32 between the locked and unlocked positions. The first sliding groove 323 and the retaining groove 322 form an L-shaped sliding groove integrally formed on the linkage member 32. A second slot 221 is formed on the latch bolt holder 22, which slidably engages with the stop pin 31 in the locking and release directions. The latch bolt holder 22 is slidably secured to the lock housing 1 by the engagement of the second slot 221 and the stop pin 31. The interlock assembly 3 has a simple structure and low manufacturing and installation costs. By rotating the linkage 32, the stop pin 31 engages the stop slot 322, thereby securely locking the lock housing 1 to the latch bolt holder 22.

[0082] See also Figures 1 to 4 As shown, when the linkage member 32 is in the unlocked position, the projection of the first slide groove 323 thereon on the lock housing 1 is opposite to the projection of the second slide groove 221 on the inclined tongue frame 22 on the lock housing 1, and both are extended along the locking and unlocking directions. The inclined tongue frame 22 can slide in the locking and unlocking directions along the positional relationship between the limit pin 31 and the first slide groove 323 and the second slide groove 221 when the handle 12 is opened. At this time, the linkage member 32 is in the unlocked state.

[0083] See also Figure 1 、 Figure 2 、 Figure 5 and Figure 6 As shown, when the latch bolt holder 22 and the linkage member 32 slide to the locked-out position in the locking-in and locking-out directions, when locking, the linkage member 32 is driven to rotate in the first direction around the first rotation axis to the locked position, so that the limit pin 31 is embedded in the stop groove 322. At this time, the stop groove 322 extends in a direction forming an angle with the locking-in and locking-out directions. The limit pin 31 is combined with the stop groove 322 to lock the lock housing 1 and the latch bolt holder 22, thereby locking the latch bolt mechanism 2 in the locked-out position to restrict the latch bolt mechanism 2 from moving in the locking direction. Figure 5 and Figure 6 When unlocking, the linkage member 32 is driven to rotate about the first rotation axis in a second direction opposite to the first direction to the unlocking position, so that the limit pin 31 moves out of the stop groove 322 and disengages from the stop groove 322 to release the lock between the lock housing 1 and the latch bolt holder 22, so that the linkage member 32 reaches the aforementioned unlocking state, as shown. Figure 1 and Figure 2As shown, at this time, the latch bolt mechanism 2 is not restricted by the interlocking assembly 3 and can slide in the locking and unlocking directions when the handle 12 is operated to open the door.

[0084] The drive and holding assembly 4 includes a transmission member 41 that is movably mounted on the lock housing 1. In this embodiment, the transmission member 41 is riveted to the lock housing 1 via a pivot screw 411 and can rotate around the central axis of the pivot screw 411, that is, around the second rotation axis. The transmission member 41 has a first end that is acted upon by the thumbwheel of the lock cylinder 11, and a second end that acts on the linkage member 32. The transmission member 41 rotates around the second rotation axis between a first extreme position and a second extreme position at its first end under the action of the thumbwheel of the lock cylinder 11, and drives the linkage member 32 to switch between a locked state and an unlocked state via the second end of the transmission member 41: when the transmission member 41 rotates around the second rotation axis to the first extreme position, the second end of the transmission member 41 drives the linkage member 32 to be in a locked state, as shown in FIG. Figure 5 and Figure 6 When the transmission member 41 is rotated about the second rotation axis to the second limit position, the second end of the transmission member 41 drives the linkage member 32 in the unlocked state, as shown Figure 1 and Figure 2 shown.

[0085] In this embodiment, the transmission member 41 is a plate-shaped structure. A limiting component 42 and an elastic retaining component are provided between the transmission member 41 and the lock housing 1.

[0086] The limiting assembly 42 includes a limiting screw 421 fixedly mounted on the lock housing 1 as a third limiting member, and an arcuate groove 422 correspondingly arranged on the transmission member 41 as a second limiting groove; the arcuate groove 422 is centered on the second rotation axis and is limited by the limiting screw 421. Optionally, the third limiting member may also be a rivet. In this embodiment, when the transmission member 41 rotates around the second rotation axis, when it rotates to the first limit position or the second limit position, the side walls of the arcuate groove 422 on the transmission member 41 can stop on the limiting screw 421 to limit the transmission member 41 from continuing to rotate, thereby limiting the rotation of the transmission member 41 to between the first limit position and the second limit position.

[0087] In this embodiment, the elastic retaining member is an elastic retaining spring 431 disposed between the limit screw 421 and the transmission member 41. The torque exerted by the elastic retaining spring 431 on the second rotation axis by the biasing force applied by the limit screw 421 and the transmission member 41 is suitable for maintaining the transmission member 41 in the first and second extreme positions when the transmission member 41 rotates to the first and second extreme positions. In this embodiment, the elastic retaining spring 431 is a torsion spring, one end of which is mounted and connected to the transmission member 41 and the other end is connected to the limit screw 421. During the unlocking or locking operation, the dial of the lock cylinder 11 drives the transmission member 41 to rotate about the second rotation axis between the first and second extreme positions. The torsion spring is deformed and subjected to torque during the rotation of the transmission member 41. When the transmission member 41 rotates to the first or second extreme position, the torsion spring deforms and returns to its original position, applying a biasing force to the transmission member 41 to maintain the transmission member 41 in the first or second extreme position.

[0088] In this embodiment, the drive-holding assembly 4 includes an interconnected transmission member 41, a position-limiting assembly 42, and an elastic holding assembly. Through the interlocking relationship between these components, the drive-holding assembly 4, when triggered by an unlocking or locking operation, drives the interlock assembly 3 to switch between the locked and unlocked states, and limits and maintains the interlock assembly 3 in the unlocked or locked state. The drive-holding assembly 4 has a simple structure, a small number of components, low manufacturing and installation costs, simple transmission, and smoother locking and unlocking operations.

[0089] A matching groove is formed at the first end of the transmission member 41 for matching with the thumb wheel of the lock cylinder 11. During the unlocking operation or the locking operation, the thumb wheel of the lock cylinder 11 can be driven to stop against the side wall of the matching groove on the transmission member 41 by turning the key, thereby driving the transmission member 41 to rotate around the second rotation axis.

[0090] A driving pin 412 suitable for sliding cooperation with the linkage member 32 is provided on the second end of the transmission member 41, and a third sliding groove 326 is correspondingly provided on the linkage member 32. The transmission member 41 slides along the third sliding groove 326 through the driving pin 412 to drive the linkage member 32 to rotate between the locked position and the unlocked position; when the linkage member 32 is in the locked position, the driving pin 412 and the third sliding groove 326 are in a self-locking relationship, so that the linkage member 32 cannot rotate to the unlocked position by itself, thereby improving the stability of the linkage member 32 in maintaining the locked position. In this embodiment, the third sliding groove 326 on the linkage member 32 is arranged parallel to the first sliding groove 323. When the linkage member 32 is in the unlocked position, the length directions of the third sliding groove 326 and the first sliding groove 323 are parallel to the locking and unlocking directions. The door opening operation through the handle 12 can drive the linkage member 32 and the inclined bolt mechanism 2 to move in the locking and unlocking directions. At this time, the third sliding groove 326 can move relative to the driving pin 412, and the driving pin 412 will not hinder the movement of the linkage member 32 and the inclined bolt mechanism 2 in the locking and unlocking directions.

[0091] The transmission mechanism 5 is disposed between the handle shaft of the handle 12 and the latch bolt mechanism 2, and is used to drive the latch bolt mechanism 2 toward the locked position. The transmission mechanism 5 includes a handle paddle 51 fixedly mounted on the handle shaft. Driven by the handle 12, the handle paddle 51 can rotate about the handle shaft. The transmission mechanism 5 also includes a transmission plate 52, pivotally connected to the lock housing 1 about a third rotation axis 521 and located between the handle paddle 51 and the latch bolt mechanism 2. The transmission plate 52 is hinged to the lock housing 1 via a solenoid and can rotate about the solenoid's central axis, i.e., the third rotation axis 521. One end of the transmission plate 52 engages with the teeth of the handle paddle 51 for transmission, while the other end is adapted to act on the latch bolt mechanism 2. This transmission plate 52 is used to transmit the torque exerted by the handle 12 on the handle shaft to the latch bolt mechanism 2, converting it into a force that overcomes the biasing force exerted by the lock-out reset element 6 on the latch bolt mechanism 2 toward the locked position and applies a thrust to the latch bolt mechanism 2 toward the locked position.

[0092] In this embodiment, the handle paddle 51 and the transmission plate 52 are gear-engaged, the transmission is stable and reliable, the handle door opening operation is relatively smooth, and the impact and noise can be reduced.

[0093] In this embodiment, the latch bolt holder 22 is formed with a crank arm 222 that cooperates with the transmission plate 52. Optionally, the transmission plate 52 is formed with an action arm for acting on the crank arm 222. The action arm of the transmission plate 52 can cooperate with the lock-out reset member 6 to abut against both sides of the crank arm 222 along the locking and unlocking direction. When the handle 12 is rotated, the handle paddle 51 engages with the transmission plate 52, driving the transmission plate 52 to rotate and causing the action arm on the transmission plate 52 to move and abut against the crank arm 222 of the latch bolt holder 22, exerting a thrust force on the crank arm 222 in the locking direction. The action arm and the crank arm 222 are corresponding protrusions bent and formed on the transmission plate 52 and the latch bolt holder 22.

[0094] In this embodiment, the transmission mechanism 5 further includes a transmission reset member 53, one end of which is connected to the transmission plate 52 and the other end is mounted on the lock housing 1. The transmission reset member 53 is used to apply a biasing force to the transmission plate 52. Under the action of this biasing force, the transmission plate 52 drives the handle paddle 51 to tend to disengage from the upper arm 222 of the latch bolt holder 22. Optionally, the transmission reset member 53 is a tension spring.

[0095] In the embodiment of the present invention, the operating principle of the door lock mechanism is as follows:

[0096] Unlock door operation: see Figure 3 and Figure 4As shown, when the linkage member 32 is in the unlocked position, the handle 12 is rotated forward, and the handle paddle 51 installed on the handle shaft is rotated. The rotation of the handle paddle 51 drives the transmission plate 52 engaged with it to rotate, and the action arm on the transmission plate 52 moves and abuts against the crank arm 222 of the inclined bolt frame 22, and applies a thrust in the locking direction to the crank arm 222. Under the action of this thrust, the inclined bolt frame 22 can slide in the locking direction along the positional relationship between the limit pin 31 and the first slide groove 323 and the second slide groove 221. At this time, the inclined bolt mechanism 2 is retracted into the lock housing 1, and the unlocking and door opening action is completed.

[0097] When the door opening operation on the handle 12 is released, the transmission reset member 53 applies a biasing force to the transmission plate 52 under the action of its own elastic force. Under the action of the biasing force, the transmission plate 52 rotates and resets to the handle paddle 51 thereon, tending to disengage from the action of the crank arm 222 on the latch bolt frame 22. When the transmission plate 52 rotates and resets, it drives the handle paddle 51 engaged with it to rotate and reset, so that the handle 12 rotates and resets in the opposite direction. At the same time, when the latch bolt mechanism 2 is retracted into the housing, the lock-out reset member 6 is compressed and deformed and applies a biasing force tending to the lock-out direction to the latch bolt frame 22 under the action of its own elastic force. Since the handle paddle 51 no longer applies a force to the crank arm 222 on the latch bolt frame 22, the latch bolt frame 22 can move in the lock-out direction to the locked position under the elastic force of the lock-out reset member 6. Figure 1 and Figure 2 shown.

[0098] Locking operation: see Figure 5 and Figure 6 As shown, when the latch bolt mechanism 2 is in the unlocked position, a key is inserted into the lock cylinder 11 and turned, causing the dial of the lock cylinder 11 to act on the first end of the transmission member 41, driving the transmission member 41 to rotate about the second rotation axis to the first limit position. The second end of the transmission member 41 then drives the linkage member 32 to rotate about the first rotation axis in the first direction to the locked position, causing the limit pin 31 to engage with the stop groove 322. The stop groove 322 then extends in a direction at an angle to the locking and unlocking direction. The limit pin 31 engages with the stop groove 322 to lock the lock case 1 and the latch bolt frame 22, thereby locking the latch bolt mechanism 2 in the unlocked position and restricting movement of the latch bolt mechanism 2 in the locking direction. At this point, rotating the handle 12 cannot drive the latch bolt mechanism to retract into the lock case 1.

[0099] Unlock operation: See Figure 5 and Figure 2As shown, when the latch bolt mechanism 2 is in the locked position, a key is inserted into the lock cylinder 11 and the key is turned in the direction opposite to the locking operation so that the dial of the lock cylinder 11 acts on the first end of the transmission member 41 to drive the transmission member 41 to rotate around the second rotation axis to the second extreme position, and the linkage member 32 rotates around the first rotation axis in a second direction opposite to the first direction to the unlocked position, so that the limit pin 31 moves out of the stop groove 322 and disengages from the stop groove 322 to release the lock between the lock housing 1 and the latch bolt frame 22, so that the linkage member 32 reaches the aforementioned unlocked state. At this time, the latch bolt mechanism 2 is not restricted by the interlocking assembly 3 and can perform the above-mentioned unlocking and door opening operation.

[0100] like Figure 7 In the embodiment shown, the door lock locking mechanism in this embodiment is the same as the other structures in the above embodiments, except that, in this embodiment, the limit assembly 42 includes a limit screw 421 fixedly provided on the lock housing 1, and an arc groove 422 correspondingly provided on the transmission member 41; the arc groove 422 is an arc groove with the second rotation axis as the center and is limitedly matched with the limit screw 421; the elastic retaining member is an elastic buckle 432 provided on the transmission member 41 and suitable for matching with the limit screw 421, and the elastic buckle 432 has two resisting parts; one of the resisting parts is used to elastically resist on the limit screw 421 when the transmission member 41 rotates to the first limit position to limit its rotation to the second limit position; the other resisting part is used to elastically resist on the limit screw 421 when the transmission member 41 rotates to the second limit position to limit its rotation to the first limit position.

[0101] This embodiment can achieve Figures 1 to 6 The beneficial effects that can be achieved by the illustrated embodiment will not be described in detail in this embodiment.

[0102] The present invention further provides a door lock, which includes the door lock locking mechanism described in any one of the aforementioned embodiments.

[0103] The door lock provided by the present invention includes the aforementioned door lock locking mechanism, wherein the technical advantages and effects achieved by the door lock also include the technical advantages and effects achieved by the door lock locking mechanism, which will not be repeated here.

[0104] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A door lock mechanism, characterized in that: include: A latch bolt mechanism (2) is movably mounted in a lock housing (1) between a locked position and a locked-out position and is biased toward the locked-out position by a lock-out reset member (6) between the lock housing (1) and the latch bolt mechanism (2); An interlocking assembly (3) is arranged between a lock housing (1) and a latch bolt mechanism (2), and is configured to lock the lock housing (1) and the latch bolt mechanism (2) to achieve a locked state in which the latch bolt mechanism (2) is locked in a locked-out position to restrict movement of the latch bolt mechanism (2) in a locked-in direction, and to unlock the latch bolt mechanism (2) by releasing the lock housing (1) and the latch bolt mechanism (2). A drive holding component (4) is arranged between the interlocking component (3) and the thumbwheel of the lock core (11), and drives the interlocking component (3) to switch between the locked state and the unlocked state after being triggered by an unlocking operation or a locking operation, and limits and holds the interlocking component (3) in the unlocked state or the locked state; A transmission mechanism (5) is provided between the handle shaft of the handle (12) and the latch bolt mechanism (2), and can drive the latch bolt mechanism (2) to move toward a locked position; Wherein, the interlocking component (3) comprises: A first limiting member, fixedly arranged on the lock housing (1); A linkage member (32) is mounted on the latch bolt mechanism (2) with a limited locking direction, and is movable relative to the latch bolt mechanism (2) between a locked position for cooperating with the first limiting member to achieve a locked state and an unlocked position for disengaging from the first limiting member to achieve an unlocked state; The linkage member (32) is provided with a limiting structure for limiting cooperation with the first limiting member; the limiting structure is combined with the first limiting member to achieve a locked state; the limiting structure is disengaged from the first limiting member to achieve an unlocked state; The limiting structure is limited to being engaged with or disengaged from the first limiting member in a direction forming an angle with the locking direction; The limiting structure is a retaining groove (322) formed on the linkage member (32); The first limiting member is a limiting pin (31) that can be embedded in or removed from the stopping groove (322) during the rotation of the linkage member (32); The linkage member (32) is also formed with a first sliding groove (323) for slidingly cooperating with the first limiting member in the locking and unlocking directions when the linkage member is in the unlocking position; The first sliding groove (323) is connected to the retaining groove (322), and when the linkage member (32) rotates between the locked position and the unlocked position, the first limiting member can switchably move in and out between the retaining groove (322) and the first sliding groove (323); The latch mechanism (2) comprises a latch bracket (22) for mounting a latch assembly (21) and slidably mounted in the lock housing (1); a second sliding groove (221) is formed on the latch bracket (22) and can be slidably engaged with the first limiting member in the locking and unlocking directions; the latch bracket (22) is slidably engaged with the first limiting member on the lock housing (1) by the engagement of the second sliding groove (221) with the first limiting member; The linkage member (32) is pivotally connected to the latch tongue holder (22) around a first rotation axis; One of the linkage member (32) and the oblique tongue frame (22) is provided with an arc-shaped first limiting groove (324) with the first rotation axis as the center, and the other of the linkage member (32) and the oblique tongue frame (22) is provided with a second limiting member (325) suitable for limiting and cooperating with the side walls at both ends of the first limiting groove (324); The linkage member (32) is suitable for limiting the linkage member (32) within a preset rotation range through the blocking and limiting of the first limiting groove (324) and the second limiting member (325); The drive holding assembly (4) comprises: A transmission member (41) has a first end acted upon by the thumbwheel of the lock cylinder (11) and a second end acted upon by the linkage member (32); the transmission member (41) is acted upon by the thumbwheel of the lock cylinder (11) and is movably mounted within the lock housing (1); and the linkage member (32) is driven to switch between a locked state and an unlocked state by the movement of the transmission member (41).

2. The door lock mechanism according to claim 1, wherein: The transmission member (41) is pivotally connected to the lock housing (1) around a second rotation axis.

3. The door lock mechanism according to claim 2, characterized in that: A limiting component (42) and an elastic retaining member are provided between the transmission member (41) and the lock housing (1); The limiting assembly (42) is used to limit the rotation of the transmission member (41) between a first limit position and a second limit position; the transmission member (41) is movably installed in the lock housing (1) between the first limit position and the second limit position, and in the first limit position, the transmission member (41) drives the linkage member (32) to be in a locked state, and in the second limit position, the transmission member (41) drives the linkage member (32) to be in an unlocked state; The elastic retaining member is used to retain the transmission member (41) at a first extreme position or a second extreme position.

4. The door lock mechanism according to claim 3, characterized in that: The limiting assembly (42) includes a third limiting member fixedly arranged on the lock housing (1), and a second limiting groove correspondingly arranged on the transmission member (41); the second limiting groove is an arc-shaped groove (422) with the second rotation axis as the center and engaging with the third limiting member; The elastic retaining member is an elastic retaining spring (431) arranged between the third limiting member and the transmission member (41), and the torque on the second rotation axis of the biasing force applied by the elastic retaining spring (431) between the third limiting member and the transmission member (41) is suitable for maintaining the transmission member (41) at the first limit position and the second limit position when the transmission member (41) rotates to the first limit position and the second limit position.

5. The door lock mechanism according to claim 3, characterized in that: The limiting assembly (42) includes a third limiting member fixedly arranged on the lock housing (1) and a second limiting groove correspondingly arranged on the transmission member (41); the second limiting groove is an arc-shaped groove (422) with the second rotation axis as the center and is limitedly matched with the third limiting member; The elastic retaining member is an elastic buckle (432) provided on the transmission member (41) and adapted to cooperate with the third limiting member, and the elastic buckle (432) has two resisting parts; One of the resisting parts is used to elastically resist the third limiting part when the transmission member (41) rotates to the first limit position to limit its rotation toward the second limit position; the other resisting part is used to elastically resist the third limiting part when the transmission member (41) rotates to the second limit position to limit its rotation toward the first limit position.

6. The door lock mechanism according to any one of claims 2 to 5, characterized in that: A driving pin (412) adapted to slide with the linkage member (32) is provided on the second end of the transmission member (41), and a third sliding groove (326) is correspondingly provided on the linkage member (32). The transmission member (41) slides along the third sliding groove (326) via the driving pin (412) to drive the linkage member (32) to rotate between the locked position and the unlocked position. When the linkage member (32) is located at the locked position, the driving pin (412) and the third sliding slot (326) are in a self-locking relationship, so that the linkage member (32) cannot rotate to the unlocked position by itself.

7. The door lock mechanism according to claim 1, wherein: The transmission mechanism (5) comprises: A handle paddle (51) is fixedly mounted on the handle shaft; A transmission plate (52) is hinged on the lock housing (1), one end of which is in gear engagement with the handle paddle (51) and the other end of which is adapted to act on the latch bolt mechanism (2) and to transmit the torque exerted by the handle (12) on the handle shaft to the latch bolt mechanism (2) and convert it into a thrust in the locking direction to overcome the biasing force applied to the latch bolt mechanism (2) toward the locked-out position.

8. The door lock mechanism according to claim 7, wherein: The latch mechanism (2) comprises a latch bracket (22) for mounting a latch assembly (21) and slidably mounted in the lock housing (1); a crank arm (222) is formed on the latch bracket (22) for cooperating with the transmission plate (52).

9. The door lock mechanism according to claim 7, wherein: The transmission mechanism (5) further comprises: A transmission reset member (53) has one end connected to the transmission plate (52) and the other end mounted on the lock housing (1). The transmission reset member (53) is used to apply a biasing force to the transmission plate (52). Under the action of the biasing force, the transmission plate (52) drives the handle paddle (51) to tend to disengage from the latch mechanism (2).

10. A door lock, characterized in that: The invention comprises the door lock mechanism according to any one of claims 1 to 9.

Images