CN117071990A - Door lock transmission mechanism - Google Patents

Abstract

The invention discloses a door lock transmission mechanism, which is used for controlling the state of a door lock, wherein the door lock comprises a first base body and a main lock positioned on the first base body, and the transmission mechanism comprises a rotating shaft and a clutch lever which are arranged on the first base body; one end of the clutch lever is provided with a first blocking part, and the other end of the clutch lever is provided with a first driving part; the main lock is provided with a first blocking matching part matched with the first blocking part; one end of the rotating shaft is provided with a second driving part, the second driving part can rotate along with the rotating shaft, and the second driving part drives the first driving part to move along a preset track through rotation, so that the first blocking part is combined with or separated from the first blocking matching part; the door lock transmission mechanism drives the clutch lever to move along the preset track through the rotating shaft, has high transmission efficiency, and can effectively solve the problem of low transmission efficiency of the worm and gear mechanism; in addition, the scheme has high working reliability through the matching design of the clutch lever and the main lock, and reduces the failure rate and the maintenance and production cost.

Description

Door lock transmission mechanism

Technical Field

The invention relates to the technical field of safety door locks, in particular to a door lock transmission mechanism.

Background

In existing door lock systems, one common type of transmission mechanism is a worm gear mechanism. Although this mechanism can transmit a certain amount of power, it has some unavoidable drawbacks. Firstly, the transmission efficiency of the worm and gear mechanism is lower, and the working principle of the worm and gear mechanism can not realize all-gear transmission, so that the efficiency of power transmission is greatly reduced. Secondly, because it adopts a closed type transmission, the structure is complex, so that a great deal of time and effort are required for cleaning and maintenance. Moreover, the worm and gear mechanism has higher requirements on assembly tolerance and high design and assembly cost. In addition, the noise of worm gear mechanism is great, and user experience is relatively poor. Therefore, there is a need to develop a novel door lock transmission mechanism to solve the problems existing in the prior art.

Disclosure of Invention

The invention aims to provide a door lock transmission mechanism which is simple in structure, convenient to maintain and reliable in performance.

In order to achieve the above object, the present invention discloses a door lock transmission mechanism for controlling a state of a door lock, the door lock including a first base and a main lock located on the first base, the transmission mechanism including a rotation shaft and a clutch lever provided on the first base;

one end of the clutch lever is provided with a first blocking part, and the other end of the clutch lever is provided with a first driving part;

the main lock is provided with a first blocking matching part matched with the first blocking part, and when the first blocking part is combined with the first blocking matching part, the first blocking part limits the free telescopic movement of the main lock;

one end of the rotating shaft is provided with a second driving part, the second driving part can rotate along with the rotating shaft, and the second driving part drives the first driving part to move along a preset track through rotation, so that the first blocking part is combined with or separated from the first blocking matching part.

Preferably, the first blocking matching part is a clamping groove.

Preferably, the second driving portion is a shifting block protruding from the rotating shaft, the shifting block and the first driving portion can move in a relatively elastic telescopic manner, so as to provide a avoiding space for rotation of the shifting block, and in the rotation process of the shifting block, an interference force is provided between the shifting block and the first driving portion, so that the shifting block provides a forward driving force or a backward driving force for the first driving portion in the rotation process, the forward driving force is used for driving the clutch lever to move forward, so that the first blocking portion is combined with the first blocking matching portion, and the backward driving force is used for driving the clutch lever to move backward, so that the first blocking portion is separated from the first blocking matching portion.

Preferably, the first driving part comprises a containing cavity arranged on the clutch lever and a movable block arranged in the containing cavity, and a first opening part facing the shifting block is arranged on the containing cavity so that the shifting block can enter and exit the containing cavity through the first opening part and is abutted with the movable block; the accommodating cavity is internally provided with a first elastic piece for the movable block, and the movable block can move in a telescopic way relative to the shifting block in the accommodating cavity by means of the first elastic piece.

Preferably, a through groove opposite to the first driving part is formed in the bottom wall of the first base body for supporting the clutch lever, a second opening part is formed in the bottom wall of the accommodating cavity, a navigation column is arranged at the bottom of the movable block, and the navigation column extends into the through groove through the second opening part; one side of the through groove, which is close to the shifting block, is provided with a first bulge which extends towards the opposite side in the through groove, and a channel for the navigation column to pass through is reserved between the first bulge and the other side of the through groove.

Preferably, the door lock further comprises a first auxiliary lock arranged on a second base body, the second base body and the first base body are independent from each other, a first connecting rod capable of reciprocating along a preset track is further arranged on the first base body, and the first connecting rod is used for controlling the movement of the first auxiliary lock so that the first auxiliary lock is in a locking state or an unlocking state; a clutch plate is further arranged between the first connecting rod and the clutch lever, a second blocking part is arranged on one side, close to the first connecting rod, of the clutch plate, and a second blocking matching part matched with the second blocking part is arranged on the first connecting rod; the clutch rod is connected with the clutch plate through a linkage mechanism, so that the clutch rod can drive the clutch plate to synchronously move, the second blocking part is combined with or separated from the second blocking matching part, and the clutch plate can control the first connecting rod to be in a free state or a fixed state by means of the second blocking part and the second blocking matching part.

Preferably, the linkage mechanism between the clutch lever and the clutch plate comprises a chute arranged on the clutch plate and a pin shaft arranged on the clutch lever, wherein the pin shaft penetrates through the chute, and the chute is obliquely arranged along the moving direction of the clutch lever.

Preferably, the first base body is further provided with a first driving mechanism, and the first driving mechanism is in transmission connection with the main lock and the first connecting rod and is used for synchronously driving the movement of the main lock and the first connecting rod.

Preferably, the first driving mechanism comprises a gear mechanism and a deflector rod sleeved on a rotating shaft of the gear mechanism, a baffle column is arranged at the tail part of the main lock, the free end of the deflector rod is in butt joint with the baffle column of the main lock, and the deflector rod drives the main lock to retract into the lock body by poking the baffle column; the first connecting rod is provided with a first tooth meshed with the gear mechanism.

Preferably, a third elastic member is further disposed in the first base body, and the third elastic member is used for providing an elastic restoring force that extends outwards for the main lock.

Preferably, the gear mechanism comprises a third gear and a fourth gear which are meshed with each other, the deflector rod is sleeved on a rotating shaft of the fourth gear, and the third gear is meshed with the first tooth.

Preferably, a tooth piece is sleeved on the rotating shaft of the third gear, a second tooth is arranged on the tooth piece, and the third gear is meshed with the first tooth through the second tooth; the tooth plate is provided with a first limit groove, the outer side wall of the rotating shaft of the third gear is also provided with a second bulge positioned in the first limit groove, the arc length of the first limit groove is larger than the tooth pitch of the third gear and the arc length of the second bulge, and the second bulge is used for pushing the tooth plate to rotate; the gear shifting mechanism is characterized in that a third bulge is arranged on the outer side wall of the rotating shaft of the fourth gear, a second limiting groove is formed in the connecting part of the shifting lever and the fourth gear, the third bulge is located in the second limiting groove, the arc length of the second limiting groove is larger than the tooth pitch of the fourth gear and the arc length of the third bulge, and the third bulge is used for pushing the shifting lever to rotate.

Preferably, the second base body is further provided with a second auxiliary lock, the first base body is further provided with a second connecting rod capable of reciprocating along a preset track and a second driving mechanism, and the second driving mechanism is used for driving the second connecting rod to reciprocate so that the second connecting rod performs locking or unlocking operation on the second auxiliary lock.

Preferably, the first link and the second link are arranged opposite to each other up and down.

Preferably, the second connecting rod is provided with a first waist-shaped hole, the second driving mechanism comprises a swinging rod, the swinging rod can do rotary swinging motion based on a rotating force, the free end of the swinging rod is provided with a connector which is inserted into the first waist-shaped hole, and the diameter of the connector is smaller than the length of the first waist-shaped hole, so that the swinging rod drives the second connecting rod to do linear motion through rotary swinging.

Preferably, the device further comprises a second base body, wherein the first auxiliary lock and the second auxiliary lock are arranged on the second base body, a third connecting rod and a fourth connecting rod are arranged on the second base body, the third connecting rod is connected with the first connecting rod, and the fourth connecting rod is connected with the second connecting rod; the third connecting rod is used for controlling the state of the first auxiliary lock, and the fourth connecting rod is used for controlling the state of the second auxiliary lock.

Preferably, the second substrate comprises a first carrier plate and a second carrier plate which are oppositely arranged; the third connecting rod is in sliding connection with the first carrier plate, and the fourth connecting rod is in sliding connection with the second carrier plate; the third connecting rod is connected with the first auxiliary lock through an L-shaped connecting piece, the connecting piece comprises a first connecting arm, a second connecting arm and a center part positioned between the first connecting arm and the second connecting arm, the connecting piece is pivoted with the first carrier plate through the center part, the first connecting arm is in slidable pivotal connection with the first auxiliary lock, and the second connecting arm is in slidable pivotal connection with the third connecting rod.

Preferably, the second carrier plate is provided with a first through hole, the fourth connecting rod is provided with a second through hole, the second through hole and the first through hole are changed in staggering degree by sliding the fourth connecting rod relative to the second carrier plate, and a lock hole is formed in a common area of the first through hole and the second through hole.

Compared with the prior art, the door lock transmission mechanism disclosed by the invention has the advantages that the clutch rod is driven to move along the preset track through the rotating shaft, the transmission efficiency is high, and the problem of low transmission efficiency of the worm and gear mechanism can be effectively solved; in addition, the scheme has high working reliability through the matching design of the clutch lever and the main lock, and reduces the failure rate and the maintenance and production cost.

Drawings

Fig. 1 is a perspective view illustrating a door lock according to an embodiment of the present invention.

Fig. 2 is a block diagram of the door lock of fig. 1 with the upper housing removed.

Fig. 3 is a mounting and mating structure diagram of the transmission mechanism of fig. 1.

FIG. 4 is a top view of FIG. 3

Fig. 5 is an assembly structure diagram of fig. 3 with the carrier substrate removed.

Fig. 6 is a view showing a structure of a fitting structure of a part of a structural member in a door lock according to another embodiment of the present invention.

Fig. 7 is a perspective view of a clutch lever according to an embodiment of the present invention.

Fig. 8 is a structural view of the outer bottom surface of fig. 5 from a view angle.

Fig. 9 is an enlarged view of a portion C in fig. 8.

Fig. 10 is a plan view of the through slot of fig. 9.

Fig. 11 is a mating structure diagram of the gear mechanism of fig. 5.

Fig. 12 is a perspective view showing a three-point linkage type door lock according to another embodiment of the present invention.

Fig. 13 is a side view of the central body portion of fig. 12.

Fig. 14 is a connection structure diagram of the swing link and the second link in fig. 13.

Fig. 15 is an exploded view of fig. 14.

Fig. 16 is a perspective view of the second substrate of fig. 12 at one of the viewing angles.

Fig. 17 is a perspective view of the second substrate of fig. 12 from another perspective.

Fig. 18 is a mounting and mating structure diagram of fig. 12 with respect to the first carrier plate and the third link.

Fig. 19 is a plan view of the locking head engaged with the second interlock device of fig. 16.

Detailed Description

In order to describe the technical content, the constructional features, the achieved objects and effects of the present invention in detail, the following description is made in connection with the embodiments and the accompanying drawings.

The embodiment discloses a novel door lock transmission mechanism for controlling the state of a door lock, wherein the door lock in the embodiment comprises a first base body and a main lock positioned on the first base body. Based on this, as shown in fig. 1 to 7, the transmission mechanism includes a rotation shaft 2 and a clutch lever 3 provided on the first base body B1.

One end of the clutch lever 3 is provided with a first blocking portion 30, and the other end of the clutch lever 3 is provided with a first driving portion 31.

The main lock S1 is provided with a first blocking matching part S10 adapted to the first blocking matching part 30, when the first blocking matching part S10 is combined with the first blocking matching part 30, the first blocking matching part 30 limits free telescopic movement of the main lock S1, and correspondingly, when the first blocking matching part S10 is separated from the first blocking matching part 30, the main lock S1 can move freely, so that the locking state of the main lock S1 is released, and a user can drive the main lock S1 to move by rotating the door handle, so that the main lock S1 can withdraw from a locking groove on the door frame.

One end of the rotating shaft 2 is provided with a second driving part 20, the second driving part 20 can rotate along with the rotating shaft 2, and the second driving part 20 drives the first driving part 31 to move along a preset track through rotation, so that the first blocking part 30 is combined with or separated from the first blocking matching part S10. In the present embodiment, the rotation shaft 2 drives the clutch lever 3 to move forward and backward in a straight line through the second driving part 20 and the first driving part 31.

In this embodiment, the clutch lever 3 is driven by the rotating shaft 2 to reciprocate along a predetermined track in a push-pull manner, so that one end of the clutch lever 3 is combined with or separated from the main lock S1, thereby realizing locking or unlocking of the main lock S1, improving the transmission efficiency of the door lock transmission mechanism, and effectively eliminating the problem of low transmission efficiency of the worm and gear mechanism. In addition, the scheme has high working reliability through the matching design of the clutch lever 3 and the main lock S1, and reduces the failure rate and the maintenance and production cost.

Specifically, the first blocking matching portion S10 on the main lock S1 is a clamping groove, and correspondingly, the first blocking portion 30 on the clutch lever 3 is a cylindrical structure, so that the first blocking portion 30 and the first blocking matching portion S10 can be mutually clamped or separated.

On the other hand, the second driving portion 20 is a shift block 20 protruding from the rotation shaft 2, and the shift block 20 and the first driving portion 31 can move in a relatively elastic manner, so as to provide a space for avoiding the rotation of the shift block 20, that is, when the shift block 20 approaches the first driving portion 31 from one side due to the rotation, the shift block 20 and the first driving portion 31 are relatively far away from each other due to the extrusion of the shift block 20, so that the shift block 20 rotates to the other side of the first driving portion 31. And in the rotation process of the shifting block 20, an interference force is provided between the shifting block 20 and the first driving portion 31, so that the shifting block 20 provides a forward driving force or a backward driving force for the first driving portion 31 in the rotation process, the forward driving force is used for driving the clutch lever 3 to move forward, so that the first blocking portion 30 is combined with the first blocking matching portion S10, and the backward driving force is used for driving the clutch lever 3 to move backward, so that the first blocking portion 30 is separated from the first blocking matching portion S10.

In this embodiment, when unlocking is required, the rotation shaft 2 is driven to rotate, the rotation shaft 2 drives the dial block 20 to rotate, as shown in fig. 4, the dial block 20 rotates from the a side to the B side of the first driving portion 31, and during the rotation of the dial block 20, the friction between the dial block 20 and the first driving portion 31 drives the first driving portion 31 to move backward, so that the first blocking portion 30 is separated from the first blocking matching portion S10. On the contrary, when the locking is needed, the rotation shaft 2 is reversed to drive the shifting block 20 to rotate from the side B to the side a of the first driving portion 31, and in the rotation process of the shifting block 20, the friction force between the shifting block 20 and the first driving portion 31 drives the first driving portion 31 to move forward, so that the first blocking portion 30 is clamped with the first blocking matching portion S10.

Specifically, the first driving part 31 includes a receiving cavity 310 provided on the clutch lever 3 and a movable block 311 provided in the receiving cavity 310, and a first opening 312 facing the dial 20 is provided on the receiving cavity 310 such that the dial 20 can enter and exit the receiving cavity 310 through the first opening 312 and abut against the movable block 311. Here, the first opening 312 includes a window formed on the side of the accommodating chamber 310 facing the dial 20 and a U-shaped groove formed on the top wall of the accommodating chamber 310.

The accommodation chamber 310 is further provided with a first elastic member (not shown) for the movable block 311, by means of which the movable block 311 can move telescopically with respect to the dial 20 in the accommodation chamber 310. In this embodiment, one end of the first elastic member abuts against the movable block 311, and the other end of the first elastic member abuts against a rear sidewall of the accommodating cavity 310, which is a sidewall opposite to the first opening 312.

With the first driving part 31 having the above-described structure, when the movable block 311 is pressed by the rotation of the dial 20, the movable block 311 compresses the first elastic member to move into the accommodating chamber 310, thereby providing a rotation escape space for the dial 20. When the shifting block 20 rotates to the other side of the movable block 311, the extrusion force of the shifting block 20 to the movable block 311 disappears, and then the movable block 311 is restored to the original position under the elastic restoring force of the first elastic piece.

Further, referring to fig. 5 to 10, a through slot 4 opposite to the first driving portion 31 is formed on a bottom wall of the first base B1 for supporting the clutch lever 3, a second opening 313 is formed on a bottom wall of the accommodating cavity 310, a navigation post 314 is disposed at a bottom of the movable block 311, and the navigation post 314 extends into the through slot 4 through the second opening 313. A first protrusion 40 extending towards the opposite side in the through groove 4 is arranged on one side of the through groove 4, which is close to the shifting block 20, and a channel 41 for the navigation post 314 to pass through is reserved between the first protrusion 40 and the other side of the through groove 4.

In this embodiment, the through slot 4 is divided into two parts, namely a first positioning slot 42 and a second positioning slot 43, which are mutually communicated by providing the first protrusion 40 in the through slot 4, and the navigation post 314 on the movable block 311 can move back and forth between the first positioning slot 42 and the second positioning slot 43 via the channel 41. When the navigation post 314 is in the first positioning groove 42, due to the action of the first elastic piece, if the movable block 311 drives the navigation post 314 to move backwards, the navigation post is blocked by the first protrusion 40, so that the movable block 311 is limited at the position, and unlocking caused by vibration is avoided.

Specifically, when the clutch lever 3 is in the locked state, the first blocking portion 30 on the clutch lever 3 and the first blocking mating portion S10 on the main lock S1 are engaged with each other, and the navigation post 314 is located in the first positioning groove 42. When the unlocking operation is required to be performed on the clutch lever 3, the shifting block 20 rotates to push the movable block 311 to compress the first elastic member and move to the other side of the first positioning groove 42, so that the navigation post 314 is separated from the limitation of the first protrusion 40 and enters the second positioning groove 43 through the channel 41, at this time, the extrusion force exerted on the movable block 311 by the shifting block 20 disappears, and then the navigation post 314 stays in the second positioning groove 43 under the elastic restoring force of the first elastic member and limits the autonomous forward movement of the movable block 311 under the blocking action of the first protrusion 40.

For convenience of user operation, one end of the rotating shaft 2 is further provided with a first operating handle P1, and the first operating handle P1 is used for driving the rotating shaft 2 to rotate. In addition, a lock cylinder X may be provided at the other end of the rotation shaft 2. When the door lock is installed, the side to which the first operating handle P1 is attached to the inside of the door, and the side to which the key cylinder X is attached to the outside of the door.

In another preferred embodiment of the present invention, in order to increase the safety performance of the door lock, the door lock is a three-point linkage door lock, that is, as shown in fig. 12, two first auxiliary locks S2 are configured in addition to the main lock S1, the main lock S1 is used for locking in the middle of the safety door, and the two first auxiliary locks S2 are respectively used for locking at the upper end and the lower end of the safety door. For this three-point type linkage door lock, in order to control the state of the main lock S1 and simultaneously control the state of the sub lock by manipulating the clutch lever 3, a further improvement is made on the transmission mechanism in the door lock, and the following embodiments will be specifically referred to.

Referring to fig. 3 to 5 and 12 in combination, the first base B1 is further provided with a first link 5 capable of reciprocating along a predetermined track, and the first link 5 is used for controlling the movement of the first auxiliary lock S2 so that the first auxiliary lock S2 is in a locked state or an unlocked state, that is, the first link 5 is used for controlling the first auxiliary lock S2 to withdraw from or enter into a locking slot on a door frame. Specifically, the two first auxiliary locks S2 are respectively connected with two ends of the first link 5 in a transmission manner, and when the first link 5 acts, the two first auxiliary locks S2 are simultaneously controlled to act synchronously.

A clutch plate 6 is further arranged between the first connecting rod 5 and the clutch lever 3, a second blocking portion 60 is arranged on one side, close to the first connecting rod 5, of the clutch plate 6, and a second blocking matching portion 50 matched with the second blocking portion 60 is arranged on the first connecting rod 5. Specifically, the second blocking portion 60 is a protrusion, and the second blocking mating portion 50 is a groove.

The clutch lever 3 is connected with the clutch plate 6 through a linkage mechanism, so that the clutch lever 3 can drive the clutch plate 6 to synchronously move, the second blocking part 60 is combined with or separated from the second blocking matching part 50, and the clutch plate 6 can control the first connecting rod 5 to be in a free state or a fixed state by means of the second blocking part 60 and the second blocking matching part 50.

For the configuration of the first connecting rod 5 and the clutch plate 6 with the above structure, when unlocking is needed, the clutch lever 3 is controlled to move backwards through the rotating shaft 2, the clutch lever 3 drives the clutch plate 6 to be far away from the first connecting rod 5 through the linkage mechanism, so that the second blocking part 60 is separated from the second blocking matching part 50, and the main lock S1 and the first connecting rod 5 are in a freely movable state, thus the door handle control mechanism can control the main lock S1 to withdraw from the corresponding locking groove, and simultaneously the first auxiliary lock S2 can be controlled to withdraw from the corresponding locking groove through the pulling of the first connecting rod 5.

Therefore, when the rotating shaft 2 rotates, the clutch rod 3 and the clutch plate 6 can be driven to act simultaneously, so that the structure is simple, and the operation and control of a user are facilitated.

Specifically, for the configuration of the clutch mechanism: the linkage mechanism between the clutch lever 3 and the clutch plate 6 comprises a chute 61 arranged on the clutch plate 6 and a pin shaft 32 arranged on the clutch lever 3, wherein the pin shaft 32 is penetrated in the chute 61, and the chute 61 is obliquely arranged along the moving direction of the clutch lever 3. In the present embodiment, by the arrangement of the chute 61 and the pin shaft 32, when the clutch lever 3 moves rearward in a straight line, the clutch plate 6 is pulled to move in a direction away from the first link 5, so that the clutch lever 3 and the clutch plate 6 move synchronously in two perpendicular directions.

On the other hand, the first base B1 is further provided with a first driving mechanism, which is in transmission connection with the main lock S1 and the first link 5 for synchronously driving the movements of the main lock S1 and the first link 5. In this embodiment, when the clutch lever 3 is controlled to withdraw from the main lock S1 by the rotation shaft 2 and the clutch plate 6 withdraws from the first link 5, the main lock S1 and the first link 5 are driven to synchronously operate by the first driving mechanism, so that the main lock S1 and the first auxiliary lock S2 synchronously withdraw from the lock groove, thereby unlocking.

Specifically, the first driving mechanism comprises a gear mechanism 70 and a deflector rod 71 sleeved on a rotating shaft of the gear mechanism 70, a blocking post S11 is arranged at the tail of the main lock S1, the free end of the deflector rod 71 is abutted with the blocking post S11 of the main lock S1, and the deflector rod 71 drives the main lock S1 to retract into the lock body by pulling the blocking post S11. The first link 5 is provided with first teeth 51 engaged with the gear mechanism 70.

The working principle of the first driving mechanism in this embodiment is as follows: when the clutch lever 3 and the clutch plate 6 are separated from the main lock S1 and the first link 5, the gear mechanism 70 is controlled to rotate, the gear mechanism 70 drives the shift lever 71 to rotate, and the free end of the shift lever 71 shifts the blocking post S11 on the main lock S1 to move backward, so that the main lock S1 is withdrawn from the corresponding lock slot. The gear mechanism 70 rotates and drives the first connecting rod 5 to move along a straight line through the first tooth 51, so that the two first auxiliary locks S2 at the two ends are pulled to withdraw from the corresponding locking grooves.

Further, after unlocking is completed, in order to enable the main lock S1 and the two first auxiliary locks S2 to automatically reset to the extended locked state, a third elastic member T is further disposed in the first base B1, and the third elastic member T is configured to provide an elastic restoring force for the main lock S1 to extend outwards. The third elastic member T in this embodiment is a torsion spring.

It should be noted that, as shown in fig. 2, the main lock S1 in this embodiment includes two parallel locking bolts, which are a first locking bolt S1 'and a second locking bolt S1", wherein the tail of the first locking bolt S1' abuts against the tail of the second locking bolt S1". The blocking post S11 is disposed on the first lock tongue S1', so that when the driving lever 71 drives the first lock tongue S1' to move backward, the first lock tongue S1' also drives the second lock tongue S1″ to move backward synchronously.

In addition, a torsion spring (as shown in fig. 6) is configured for the first lock tongue S1' and the second lock tongue S1″ respectively, so that the first lock tongue S1' and the second lock tongue S1' can be automatically reset to the extended state.

On the other hand, as shown in fig. 3 to 6, the gear mechanism 70 includes a third gear 72 and a fourth gear 73 that are engaged with each other, the lever 71 is sleeved on the rotation shaft of the fourth gear 73, and the third gear 72 is engaged with the first tooth 51. In the embodiment, the first connecting rod 5 and the main lock S1 are respectively driven by the cooperation of the third gear 72 and the fourth gear 73, so that the stability is better and the reliability is high.

Further, the third gear 72 is a driving wheel, the fourth gear 73 is a driven wheel, and the first base B1 is further provided with a second operating handle P2 (as shown in fig. 2) connected to the third gear 72. The rotating shaft 2 of the third gear 72 is further sleeved with a tooth piece 74, the tooth piece 74 is provided with a second tooth 741, the third gear 72 is meshed with the first tooth 51 through the second tooth 741, namely, the tooth piece 74 is directly meshed with the first connecting rod 5, the third gear 72 drives the tooth piece 74 to rotate, and the tooth piece 74 drives the first connecting rod 5 to move along a straight line through the first tooth 51 and the second tooth 741.

Furthermore, the tooth plate 74 is provided with a first limiting groove 740, the outer side wall of the rotating shaft of the third gear 72 is further provided with a second protrusion 720 located in the first limiting groove 740, the arc length of the first limiting groove 740 is greater than the tooth pitch of the third gear 72 and the arc length of the second protrusion 720, and the second protrusion 720 is used for pushing the tooth plate 74 to rotate.

The outer side wall of the rotating shaft of the fourth gear 73 is provided with a third protrusion 730, a second limit groove 710 is arranged at the connection part of the deflector rod 71 and the fourth gear 73, the third protrusion 730 is positioned in the second limit groove 710, the arc length of the second limit groove 710 is larger than the tooth pitch of the fourth gear 73 and the arc length of the third protrusion 730, and the third protrusion 730 is used for pushing the deflector rod 71 to rotate. In the present embodiment, the pitch of the third gear 72 and the fourth gear 73 is equal.

Based on the above configuration, when the rotation shaft 2 rotates by a small angle, the second protrusion 720 cannot abut against the sidewall in the first limiting groove 740, the third protrusion 730 cannot abut against the sidewall in the second limiting groove 710, and then the third gear 72 will not drive the tooth plate 74 to rotate, and the third gear 72 will not drive the shift lever 71 to rotate, so the main lock S1 and the two first sub-locks S2 cannot be operated to act. Therefore, the main lock S1 and the two first auxiliary locks S2 can be prevented from immediately responding when the rotating shaft 2 rotates by a small rotation amount due to misoperation of a user, the use experience of the user is effectively improved, and the service life of the door lock can be prolonged.

On the other hand, in some applications, an inner door (such as a screen door) is further disposed in the safety door, and the inner door is also configured with a door lock, so that the door lock has functions of locking and unlocking the inner door at the same time, the door lock in this embodiment further includes a second auxiliary lock S3 (fig. 16), as shown in fig. 12 and 13, a second connecting rod 8 capable of reciprocating along a predetermined track and a second driving mechanism are further disposed on the first base B1, and the second driving mechanism is used for driving the second connecting rod 8 to reciprocate, so that the second connecting rod 8 performs locking or unlocking operation on the second auxiliary lock S3. In this embodiment, when the second auxiliary lock S3 is required to be operated to lock or unlock the inner door, the second link 8 is driven by the second driving mechanism to linearly move along the predetermined track. In the present embodiment, the second latches S3 are also provided in two, respectively arranged at both ends of the second link 8.

Specifically, the first link 5 and the second link 8 are arranged opposite to each other up and down to save layout space.

In addition, as shown in fig. 14 and 15, the second link 8 is provided with a first waist-shaped hole 80, the second driving mechanism includes a swing rod 9, the swing rod 9 can perform a rotation swing motion based on a rotation force, a free end of the swing rod 9 is provided with a connector 90 inserted into the first waist-shaped hole 80, and a diameter of the connector 90 is smaller than a length of the first waist-shaped hole 80, so that the swing rod 9 drives the second link 8 to move along a straight line through the rotation swing. In the embodiment, the purpose of driving linear motion through rotary motion is achieved through the arrangement of the first waist-shaped holes 80 on the swing rod 9 and the second connecting rod 8, so that the efficiency is higher, and the installation space is saved.

Furthermore, in order to facilitate the control of the rotation of the swing rod 9, as shown in fig. 2, a third operating handle P3 is further disposed on the first base B1, and the third operating handle P3 is connected to the swing rod 9 through a connecting rod G. When the third operating handle P3 is rotated, the swinging rod 9 can be driven to swing in a rotating way through the connecting rod G, and the operation is convenient.

Further, as shown in fig. 12 and 16 to 18, the mounting structure with respect to the first sub-lock S2 and the second sub-lock S3 is: a second base body B2 is provided separately from the first base body B1, and the first sub-lock S2 and the second sub-lock S3 are provided on the second base body B2. The second base B2 is provided with a third link 100 and a fourth link 101, the third link 100 is connected to the first link 5, and the fourth link 101 is connected to the second link 8. The third link 100 is used to operate the state of the first sub-lock S2, and the fourth link 101 is used to operate the state of the second sub-lock S3.

Specifically, since the first sub-lock S2 and the second sub-lock S3 are two, respectively, the two second base bodies B2 are configured accordingly, and in use, the first base body B1 is generally installed in the middle of the door, and the two second base bodies B2 are installed at the upper and lower ends of the door, respectively. When the first connecting rod 5 acts, the third connecting rod 100 on the upper and lower second substrates B2 is driven to act at the same time so as to drive the upper and lower first auxiliary locks S2 to act; when the second link 8 is operated, the fourth links 101 on the upper and lower second bases B2 are simultaneously driven to operate, so as to drive the upper and lower second latches S3 to operate.

Further, as shown in fig. 16 to 18, the second substrate B2 includes a first carrier plate B20 and a second carrier plate B21 disposed opposite to each other. The third connecting rod 100 is slidably connected to the first carrier plate B20, and the fourth connecting rod 101 is slidably connected to the second carrier plate B21.

The third connecting rod 100 is connected to the first auxiliary lock S2 through an L-shaped connecting piece 102, the connecting piece 102 includes a first connecting arm 1020, a second connecting arm 1021, and a central portion 1022 located between the first connecting arm 1020 and the second connecting arm 1021, the connecting piece 102 is pivotally connected to the first carrier board B20 through the central portion 1022, the first connecting arm 1020 is slidably pivotally connected to the first auxiliary lock S2, and the second connecting arm 1021 is slidably pivotally connected to the third connecting rod 100.

Specifically, the third connecting rod 100 is provided with a second waist-shaped hole 103, and the first carrier plate B20 is provided with a first connecting column 104 adapted to the second waist-shaped hole 103. When the first link 5 applies a push/pull force to the third link 100, the third link 100 slides along the first connection post 104 through the second waist-shaped hole 103.

The first connecting arm 1020 is provided with a third waist-shaped hole 106, and the second connecting arm 1021 is provided with a fourth waist-shaped hole 109. The first auxiliary lock S2 is provided with a second connecting post 107 adapted to the third waist-shaped hole 106, and the third connecting rod 100 is provided with a third connecting post 108 adapted to the fourth waist-shaped hole 109. And a linear chute 110 slidably connected to the second connecting post 107 is disposed on the first carrier B20 to limit the movement track of the second connecting post 107, so that the first auxiliary lock S2 performs telescopic movement in a linear movement manner. In fig. 18, when the third link 100 is pulled down in the direction F1, the second connecting arm 1021 is driven to rotate in a downward arc through the third connecting post 108 and the fourth waist-shaped hole 109, and accordingly, the first connecting arm 1020 is driven to rotate in an upward arc, so that the first auxiliary lock S2 is driven to extend outwards (lock up) under the cooperation of the third waist-shaped hole 106, the second connecting post 107 and the linear chute 110. Similarly, when the third link 100 is pushed up along the F2 direction, the second connecting arm 1021 is driven to rotate in an upward arc shape through the third connecting post 108 and the fourth waist-shaped hole 109, and accordingly, the first connecting arm 1020 is driven to rotate in a downward arc shape, so that the first auxiliary lock S2 is driven to retract (unlock) inwards under the cooperation of the third waist-shaped hole 106, the second connecting post 107 and the linear chute 110.

In addition, a torsion spring 111 is further disposed on the third connecting post 108, and the torsion spring 111 is used for providing an elastic restoring force for the first auxiliary lock S2 extending laterally outwards, so that the first auxiliary lock S2 can be automatically reset to the locked state.

The primary lock S1 and the first secondary lock S2 in the above embodiment are both solid blocks that cooperate with the locking grooves in the door frame. However, for the second sub-lock S3, as shown in fig. 16, it is a lock hole adapted to the hook on the inner door, and therefore, the configuration for the second sub-lock S3 in this embodiment is as follows: the second carrier plate B21 is provided with a first through hole S30, the fourth connecting rod 101 is provided with a second through hole S31, the interleaving degree of the second through hole S31 and the first through hole S30 is changed through the sliding of the fourth connecting rod 101 relative to the second carrier plate B21, and a lock hole is formed in a common area of the first through hole S30 and the second through hole S31. That is, when the degree of staggering of the second through hole S31 and the first through hole S30 is zero, the first through hole S30 cannot be blocked by the fourth link 101 so that the common area of the first through hole S30 is maximized. When the fourth link 101 is slid such that the degree of staggering of the second through holes S31 and the first through holes S30 becomes large, a part of the first through holes S30 is caused to be blocked by the fourth link 101, so that the common area of the first through holes S30 becomes small.

When the second auxiliary lock S3 with the above structure is used, as shown in fig. 19, a cylinder lock head M needs to be installed on the inner door or the inner door, the front end of the lock head M is a pointed structure M1, and the rear end of the lock head M is provided with a clamping groove M2 opening towards one side.

For the second auxiliary lock S3 with the above structure, the locking operation flow is as follows: when the second sub-lock S3 is separated from the locking head M, the degree of staggering of the second through hole S31 and the first through hole S30 is large, so that a portion of the first through hole S30 is blocked by the fourth link 101. Then, the lock head M is controlled to approach the first through hole S30, the first through hole S30 and the second through hole S31 are inserted through the tip structure M1 at the front end of the lock head M, along with the extension of the lock head M, the part of the fourth connecting rod 101, which shields the first through hole S30, is ejected, so that the lock head M completely enters the first through hole S30 and the second through hole S31, and after the clamping groove M2 on the lock head M enters the second through hole S31, the space in the clamping groove is vacated, so that the fourth connecting rod 101 can be reset to a state in which the first through hole S30 and the through hole are dislocated again, the opening degree of the first through hole S30 is reduced, and the lock head M is clamped in the part, which is right opposite to the second through hole S31, of the first through hole S30.

In addition, after the lock head M enters the second through hole S31, in order to facilitate the automatic reset of the fourth link 101, a third elastic member 112 is further disposed between the fourth link 101 and the second base B2, and the fourth elastic member 112 provides a force for the fourth link 101 to move in a constant direction so that the first through hole S30 and the second through hole S31 are offset from each other.

In summary, the invention discloses a three-point linkage type door lock, which comprises a main lock S1 arranged on a first base body B1, two first auxiliary locks S2 and two second auxiliary locks S3 arranged on two second base bodies B2, wherein the main lock S1 and the two first auxiliary locks S2 can be unlocked simultaneously by driving the rotation of a rotating shaft 2, and the three-point linkage type door lock is simple in structure and high in reliability. In addition, by providing two second auxiliary locks S3, the locking function can be provided for the inner door at the same time.

The foregoing description of the preferred embodiments of the present invention is not intended to limit the scope of the claims, which follow, as defined in the claims.

Claims (18)

1. A door lock transmission mechanism for controlling the state of a door lock, wherein the door lock comprises a first base body and a main lock positioned on the first base body, and the door lock transmission mechanism is characterized by comprising a rotating shaft and a clutch lever which are arranged on the first base body;

one end of the clutch lever is provided with a first blocking part, and the other end of the clutch lever is provided with a first driving part;

the main lock is provided with a first blocking matching part matched with the first blocking part, and when the first blocking part is combined with the first blocking matching part, the first blocking part limits the free telescopic movement of the main lock;

one end of the rotating shaft is provided with a second driving part, the second driving part can rotate along with the rotating shaft, and the second driving part drives the first driving part to move along a preset track through rotation, so that the first blocking part is combined with or separated from the first blocking matching part.

2. The door lock transmission mechanism of claim 1, wherein the first blocking engagement is a detent.

3. The door lock transmission mechanism according to claim 1, wherein the second driving portion is a shifting block protruding from the rotating shaft, the shifting block and the first driving portion can move in a relatively elastic telescopic manner, so as to provide a space for avoiding rotation of the shifting block, and in the rotation process of the shifting block, an interference force is provided between the shifting block and the first driving portion, so that the shifting block provides a forward driving force or a backward driving force for the first driving portion in the rotation process, the forward driving force is used for driving the clutch lever to move forward, so that the first blocking portion is combined with the first blocking matching portion, and the backward driving force is used for driving the clutch lever to move backward, so that the first blocking portion is separated from the first blocking matching portion.

4. The door lock transmission mechanism according to claim 3, wherein the first driving portion includes a housing chamber provided on the clutch lever and a movable block provided in the housing chamber, the housing chamber being provided with a first opening portion directed toward the dial block so that the dial block can enter and exit the housing chamber through the first opening portion and abut against the movable block; the accommodating cavity is internally provided with a first elastic piece for the movable block, and the movable block can move in a telescopic way relative to the shifting block in the accommodating cavity by means of the first elastic piece.

5. The door lock transmission mechanism according to claim 4, wherein a through groove opposite to the first driving part is formed in a bottom wall of the first base body for supporting the clutch lever, a second opening part is formed in a bottom wall of the accommodating cavity, a navigation column is arranged at the bottom of the movable block, and the navigation column extends into the through groove through the second opening part; one side of the through groove, which is close to the shifting block, is provided with a first bulge which extends towards the opposite side in the through groove, and a channel for the navigation column to pass through is reserved between the first bulge and the other side of the through groove.

6. The door lock transmission mechanism according to claim 1, further comprising a first sub-lock provided on a second base, the second base and the first base being independent of each other, the first base further being provided with a first link reciprocally movable along a predetermined trajectory, the first link being for manipulating movement of the first sub-lock so that the first sub-lock is in a locked state or an unlocked state; a clutch plate is further arranged between the first connecting rod and the clutch lever, a second blocking part is arranged on one side, close to the first connecting rod, of the clutch plate, and a second blocking matching part matched with the second blocking part is arranged on the first connecting rod; the clutch rod is connected with the clutch plate through a linkage mechanism, so that the clutch rod can drive the clutch plate to synchronously move, the second blocking part is combined with or separated from the second blocking matching part, and the clutch plate can control the first connecting rod to be in a free state or a fixed state by means of the second blocking part and the second blocking matching part.

7. The door lock transmission mechanism according to claim 6, wherein the interlocking mechanism between the clutch lever and the clutch plate includes a chute provided on the clutch plate and a pin provided on the clutch lever, the pin being inserted in the chute, the chute being disposed obliquely in a moving direction of the clutch lever.

8. The door lock transmission mechanism according to claim 6, wherein a first driving mechanism is further provided on the first base body, and the first driving mechanism is in transmission connection with the main lock and the first link for synchronously driving the movements of the main lock and the first link.

9. The door lock transmission mechanism according to claim 8, wherein the first driving mechanism comprises a gear mechanism and a deflector rod sleeved on a rotating shaft of the gear mechanism, a baffle column is arranged at the tail part of the main lock, the free end of the deflector rod is abutted with the baffle column of the main lock, and the deflector rod drives the main lock to retract into the lock body by pulling the baffle column; the first connecting rod is provided with a first tooth meshed with the gear mechanism.

10. The door lock transmission mechanism of claim 9, wherein a third elastic member is further provided in the first base body, the third elastic member being configured to provide an elastic restoring force protruding outward to the main lock.

11. The door lock transmission mechanism according to claim 10, wherein the gear mechanism comprises a third gear and a fourth gear which are meshed with each other, the deflector rod is sleeved on a rotating shaft of the fourth gear, and the third gear is meshed with the first tooth.

12. The door lock transmission mechanism according to claim 11, wherein a tooth piece is further sleeved on the rotating shaft of the third gear, a second tooth is arranged on the tooth piece, and the third gear is meshed with the first tooth through the second tooth; the tooth plate is provided with a first limit groove, the outer side wall of the rotating shaft of the third gear is also provided with a second bulge positioned in the first limit groove, the arc length of the first limit groove is larger than the tooth pitch of the third gear and the arc length of the second bulge, and the second bulge is used for pushing the tooth plate to rotate; the gear shifting mechanism is characterized in that a third bulge is arranged on the outer side wall of the rotating shaft of the fourth gear, a second limiting groove is formed in the connecting part of the shifting lever and the fourth gear, the third bulge is located in the second limiting groove, the arc length of the second limiting groove is larger than the tooth pitch of the fourth gear and the arc length of the third bulge, and the third bulge is used for pushing the shifting lever to rotate.

13. The door lock transmission mechanism according to claim 6, wherein a second sub-lock is further provided on the second base, and the first base is further provided with a second link rod and a second driving mechanism that can reciprocate along a predetermined trajectory, the second driving mechanism being configured to drive the second link rod to reciprocate, so that the second link rod performs a locking or unlocking operation for the second sub-lock.

14. The door lock transmission mechanism of claim 13, wherein the first link and the second link are disposed opposite one another.

15. The door lock transmission mechanism according to claim 13, wherein the second link is provided with a first waist-shaped hole, the second driving mechanism includes a swing rod, the swing rod can perform rotational swing motion based on a rotational force, a free end of the swing rod is provided with a connector inserted into the first waist-shaped hole, and a diameter of the connector is smaller than a length of the first waist-shaped hole, so that the swing rod drives the second link to move along a straight line through rotational swing.

16. The door lock transmission mechanism according to claim 13, further comprising a second base body, wherein the first sub-lock and the second sub-lock are provided on the second base body, a third link and a fourth link are provided on the second base body, the third link is connected with the first link, and the fourth link is connected with the second link; the third connecting rod is used for controlling the state of the first auxiliary lock, and the fourth connecting rod is used for controlling the state of the second auxiliary lock.

17. The door lock transmission mechanism of claim 16, wherein the second base includes a first carrier plate and a second carrier plate disposed opposite each other; the third connecting rod is in sliding connection with the first carrier plate, and the fourth connecting rod is in sliding connection with the second carrier plate; the third connecting rod is connected with the first auxiliary lock through an L-shaped connecting piece, the connecting piece comprises a first connecting arm, a second connecting arm and a center part positioned between the first connecting arm and the second connecting arm, the connecting piece is pivoted with the first carrier plate through the center part, the first connecting arm is in slidable pivotal connection with the first auxiliary lock, and the second connecting arm is in slidable pivotal connection with the third connecting rod.

18. The door lock transmission mechanism according to claim 17, wherein a first through hole is provided in the second carrier plate, a second through hole is provided in the fourth link, the staggering degree of the second through hole and the first through hole is changed by sliding the fourth link relative to the second carrier plate, and a common area of the first through hole and the second through hole forms a lock hole.