Three-lock, two-open locks and locking devices

Abstract

The present invention discloses a three-lock and two-unlock lockset and a locking device, the main purpose of which is to achieve smooth unlocking of the three-lock and two-unlock lockset. The main technical scheme of the present invention is: the three-lock and two-unlock lockset comprises a base, three locks, a linkage mechanism and a driving mechanism, the driving mechanism is connected to the linkage mechanism; the three locks and the driving mechanism are respectively arranged on the base; the linkage mechanism is movably arranged on the base; the lock tongues of the three locks are respectively separated from the linkage mechanism and the driving mechanism; when any two of the three locks are unlocked, an unlocking position is formed, and the driving mechanism can drive the linkage mechanism to move to the unlocking position. The present invention is mainly used to achieve smooth unlocking of the three-lock and two-unlock lockset.

Description

Technical Field

[0001] The present invention relates to the technical field of locks, and in particular to a three-lock and two-release lock and a locking device. Background Art

[0002] Locks, especially multi-lock and multi-open locks, have high anti-theft performance and are widely used in safe deposit boxes and other fields.

[0003] At present, the lock tongue of the lock in this type of lock is connected to its transmission system, and the lock tongue applies an unlocking force to the transmission system to drive the transmission system to move in the unlocking direction to achieve unlocking. However, in the era of increasingly widespread application of electronic locks, if the lock in this type of lock is replaced with an electronic lock, the motor power of the electronic lock is generally small, resulting in insufficient unlocking force for the lock tongue to drive the entire transmission system to move, thereby making it impossible to unlock. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides a three-lock and two-unlock lockset and a locking device, the main purpose of which is to achieve smooth unlocking of the three-lock and two-unlock lockset.

[0005] In order to achieve the above object, the present invention mainly provides the following technical solutions:

[0006] On the one hand, an embodiment of the present invention provides a three-lock and two-release lock, comprising a base, three locks, a linkage mechanism and a drive mechanism, wherein the drive mechanism is connected to the linkage mechanism;

[0007] The three locks and the driving mechanism are respectively arranged on the base; the linkage mechanism is movably arranged on the base;

[0008] The lock tongues of the three locks are separated from the linkage mechanism and the driving mechanism respectively;

[0009] When any two of the three locks are unlocked, an unlocking position is formed, and the driving mechanism can drive the linkage mechanism to move to the unlocking position.

[0010] Furthermore, when any two of the three locks are unlocked, the unlocking positions can be formed at their original lock tongue positions respectively;

[0011] The linkage mechanism includes a driving plate and three stoppers connected to the driving plate, the driving plate and the three stoppers are movably arranged on the base, and the driving plate is connected to the bolt plate;

[0012] When any two of the three locks are unlocked, the driving mechanism can drive two of the three stoppers to move to the unlocking positions of the two locks that are in the unlocking state, respectively.

[0013] Further, the linkage mechanism further includes a first connecting rod and a second connecting rod;

[0014] The middle portion of the first connecting rod has a first inflection point, and the first connecting rod is hinged to the driving plate through the first inflection point;

[0015] The middle portion of the second connecting rod has a second inflection point, and the second connecting rod is hinged to one end of the first connecting rod through the second inflection point;

[0016] One end of one of the three blocking members is hinged to the limiting hole arranged at the other end of the first connecting rod, and one end of the other two blocking members is hinged to the limiting holes arranged at both ends of the second connecting rod respectively.

[0017] Furthermore, a side wing extending outward is provided on one side of the stopper, and the height of the side wing is higher than the bottom surface height of the lock tongue of the lock;

[0018] When any one of the three locks is locked, the side wing of one of the three stoppers can abut against the lock tongue of the lock in the locked state and be fixed.

[0019] Furthermore, the three-lock and two-unlock lockset also includes:

[0020] Pressing plates and pins;

[0021] The pressing sheet is connected to the base through the pin shaft and is opposite to the lock tongue of the lock;

[0022] The blocking member is sleeved on the pin shaft through an oblong hole provided thereon, and the oblong hole extends along the unlocking direction. The blocking member is located between the pressing plate and the base, and can move relative to the pin shaft along its length direction in the oblong hole.

[0023] Further, the driving mechanism includes a bolt plate, a first rotating shaft, a gear and a rack;

[0024] The bolt plate is connected to the drive plate;

[0025] The rack is arranged on the bolt plate and extends along the unlocking direction;

[0026] The gear transmits torque to the first rotating shaft, and the first rotating shaft is disposed on the bolt plate;

[0027] The rack is meshingly connected with the gear;

[0028] When the first rotating shaft is rotated, the rack drives the bolt plate to move along the unlocking direction.

[0029] Furthermore, the driving plate is provided with two guiding oblong holes which are opposite to each other and inclined in the length direction;

[0030] The three-lock and two-release lockset also includes two sets of protection components, and the protection components include a limit moving part and a limit block;

[0031] One end of the position-limiting movable member is hinged to the bolt plate, and the other end of the position-limiting movable member is hinged in the guide oblong hole;

[0032] The limit block is arranged on the base, and a limit protrusion is arranged on the base;

[0033] One end of the guiding oblong hole corresponds to the limiting surface of the limiting protrusion, and the other end of the guiding oblong hole is outwardly away from the limiting surface.

[0034] Furthermore, the limit block includes a limit fixing member, a pin body, an elastic member and a blocking member;

[0035] The limiting member is provided with a first through hole, and the blocking member is provided with a second through hole;

[0036] The blocking member blocks one end of the first through hole;

[0037] One end of the pin body passes through one end of the first through hole, and the other end of the pin body passes through the second through hole, and the elastic member is blocked in the first through hole by the blocking member;

[0038] The pin body contacts and supports the position-limiting movable member.

[0039] Further, the top of the first through hole is provided with a first annular shoulder facing inwards, and the pin body is provided with a second annular shoulder facing outwards;

[0040] The inner diameter of the first annular shoulder is equal to the diameter of the pin body and the inner diameter of the second through hole;

[0041] The outer diameter of the elastic member is equal to the inner diameter of the first through hole.

[0042] On the other hand, an embodiment of the present invention further provides a locking device, including the aforementioned three-lock and two-release lock.

[0043] By means of the above technical solution, the present invention has at least the following beneficial effects:

[0044] According to the technical solution provided by the embodiment of the present invention, three locks and a driving mechanism are respectively arranged on a base, a linkage mechanism is movably arranged on the base and connected to the driving mechanism, and the lock tongues of the three locks are respectively separated from the linkage mechanism and the driving mechanism, so that when any two of the three locks are unlocked to form an unlocking position, the driving mechanism can drive the linkage mechanism to move to the unlocking position to achieve unlocking.

[0045] Compared with the prior art, the three-lock and two-unlock lock provided by the embodiment of the present invention has three locks whose lock tongues are separately arranged from the linkage mechanism and the driving mechanism, instead of being connected to the two, and the driving mechanism applies an unlocking force to the linkage mechanism, so that the linkage mechanism moves to the unlocking position of the lock to achieve unlocking, so that the unlocking direction of the lock is from the driving end to the lock end, instead of from the lock end to the driving end. The unlocking method formed in this way not only solves the problem that the lock cannot be unlocked when replaced with an electronic lock in the prior art, but also makes the structure of the lock simpler, unlocking more convenient, and reducing costs. In addition, the three-lock and two-unlock lock provided by the embodiment of the present invention can also achieve normal unlocking when one of the three locks fails, without the need to destroy the relevant structure of the lock for abnormal unlocking, which is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic diagram of a typical three-dimensional structure of a three-lock and two-release lock in one direction involved in an embodiment of the present invention, wherein the first lock, the second lock, and the third lock are all in the locked position;

[0047] Figure 2 It is a schematic diagram of the planar structure of a three-lock and two-release lock in a typical direction involved in an embodiment of the present invention, wherein the drive plate has been disassembled, and the first lock, the second lock, and the third lock are all in the locked position;

[0048] Figure 3 It is a schematic plan view of the structure of the three-lock and two-release lock in another typical direction involved in the embodiment of the present invention;

[0049] Figure 4 It is a schematic planar structural diagram of a typical direction of a bolt plate and various components connected to the bolt plate used in a three-lock and two-release lockset involved in an embodiment of the present invention;

[0050] Figure 5 A schematic plan view of the structure of a bolt plate and components connected to the bolt plate in another typical direction used in a three-lock and two-release lockset according to an embodiment of the invention;

[0051] Figure 6 for Figure 2 Left view of;

[0052] Figure 7 for Figure 2 Right view of;

[0053] Figure 8 It is a schematic diagram of a three-dimensional structure of a typical direction of a driving plate used in a three-lock and two-release lock according to an embodiment of the present invention;

[0054] Fig. 9It is a schematic diagram of the three-dimensional structure of any one of the first lock, the second lock, and the third lock used in the three-lock and two-release lockset involved in the embodiment of the present invention;

[0055] Fig.10 It is a schematic diagram of the three-dimensional structure of any one of the first stopper, the second stopper, and the third stopper used in the three-lock and two-release lock device involved in the embodiment of the present invention;

[0056] Fig.11 An exploded view of any one of the first limit block and the second limit block used in the three-lock and two-release lockset involved in the embodiment of the present invention;

[0057] Fig.12 It is an assembly diagram of any one of the first limiting block and the second limiting block used in the three-lock and two-release lockset involved in the embodiment of the present invention;

[0058] Fig.13 for Fig.12 Middle AA section view;

[0059] Fig.14 It is a plan view of a typical direction when the first lock and the second lock of the three-lock and two-unlock lock device involved in the embodiment of the present invention are in the unlocking position;

[0060] Fig.15 It is a schematic diagram of the structure of the protection component used in the three-lock and two-release lockset involved in the implementation scheme of the present invention. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be described in more detail in conjunction with the drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of the present invention, not all of them. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present invention, and cannot be understood as limiting the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention. The embodiments of the present invention are described in detail in conjunction with the drawings. In the description of this embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present embodiment and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present embodiment.

[0062] like Figures 1 to 14 As shown, the embodiment of the present invention provides a three-lock and two-open lock, comprising a base 1, three locks 4, a linkage mechanism and a driving mechanism, wherein the driving mechanism is connected to the linkage mechanism; the three locks 4 and the driving mechanism are respectively arranged on the base 1; the linkage mechanism is movably arranged on the base 1; the lock tongues of the three locks 4 are respectively separated from the linkage mechanism and the driving mechanism; when any two of the three locks 4 are unlocked, an unlocking position is formed, and the driving mechanism can drive the linkage mechanism to move to the unlocking position. Fig. 9 A lock tongue 30 is provided on the lock 4, and a moving pair is formed between the lock tongue 30 and the lock tongue groove of the lock 4, so that when the lock tongue 30 is retracted into the lock tongue groove, the lock 4 is in the unlocking position, that is, in the unlocking state; when the lock tongue 30 is extended from the lock tongue groove, the lock 4 is in the locking position, that is, in the locking state.

[0063] The three-lock and two-unlock lockset provided by the embodiment of the present invention has three locks and a driving mechanism respectively arranged on a base, a linkage mechanism is movably arranged on the base and connected to the driving mechanism, and the lock tongues of the three locks are respectively separated from the linkage mechanism and the driving mechanism, so that when any two of the three locks are unlocked to form an unlocking position, the driving mechanism can drive the linkage mechanism to move to the unlocking position to achieve unlocking.

[0064] Compared with the prior art, the three-lock and two-unlock lock provided by the embodiment of the present invention has three locks whose lock tongues are separately arranged from the linkage mechanism and the driving mechanism, instead of being connected to the two, and the driving mechanism applies an unlocking force to the linkage mechanism, so that the linkage mechanism moves to the unlocking position of the lock to achieve unlocking, so that the unlocking direction of the lock is from the driving end to the lock end, instead of from the lock end to the driving end. The unlocking method formed in this way not only solves the problem that the lock cannot be unlocked when replaced with an electronic lock in the prior art, but also makes the structure of the lock simpler, unlocking more convenient, and reducing costs. In addition, the three-lock and two-unlock lock provided by the embodiment of the present invention can also achieve normal unlocking when one of the three locks fails, without the need to destroy the relevant structure of the lock for abnormal unlocking, which is more convenient to use.

[0065] In order to make the structure of the three-lock and two-unlock lock simpler and reduce the cost, in some examples, when any two locks 4 among the three locks 4 are unlocked, they can form unlocked positions at their original lock tongue positions respectively; and the linkage mechanism can include a driving plate 2 and three blocks 5 connected to the driving plate 2, the driving plate 2 and the three blocks 5 can be movably arranged on the base 1 respectively, and the driving plate 2 is connected to the bolt plate 3; when any two locks 4 among the three locks 4 are unlocked, the driving mechanism can drive two blocks 5 among the three blocks 5 to move to the unlocking positions of the two locks 4 that are in the unlocked state respectively.

[0066] In some examples, the linkage mechanism may also include a first link 9 and a second link 10; the first link 9 has a first inflection point α in the middle, and the first link 9 is hinged to the drive plate 2 through the first inflection point α; the second link 10 has a second inflection point β in the middle, and the second link 10 is hinged to one end of the first link 9 through the second inflection point β, and the first inflection point α can be close to the end where the first link 9 and the second link 10 are hinged, and away from the other end, one end of one of the three blocks 5 is hinged to the limiting hole set at the other end of the first link 9, and one end of the other two blocks 5 are respectively hinged to the limiting holes set at both ends of the second link 10.

[0067] In the above embodiment, the three-lock and two-release lock comprises a base 1, a first lock 4a, a second lock 4b, a third lock 4c, a first stopper 5a, a second stopper 5b, a third stopper 5c, a first connecting rod 9 and a second connecting rod 10 of a driving plate 2. The first lock 4a, the second lock 4b and the third lock 4c are fixedly connected to the base 1 along a set direction, and the three can be arranged side by side in the same direction, so that there is a first gap between the first lock 4a and the second lock 4b, a second gap between the second lock 4b and the third lock 4c, and a third gap between the third lock 4c and one edge of the base 1. On the base 1, the first gap is provided with a first oblong hole 41a, the first gap is provided with a second oblong hole 41b, and the third gap is provided with a third oblong hole 41c, so that the length directions of the first oblong hole 41a, the second oblong hole 41b and the third oblong hole 41c are in the set direction. When the first lock 4a is in the unlocking position, the first stopper 5a and the first oblong hole 41a form a moving pair along the set direction; when the second lock 4b is in the unlocking position, the second stopper 5b and the second oblong hole 41b form a moving pair along the set direction; when the third lock 4c is in the unlocking position, the third stopper 5c and the third oblong hole 41c form a moving pair along the set direction. One end 9c of the first connecting rod 9 is hinged to the first stopper 5a and the first oblong hole 41a through the first limiting oblong hole 11; the middle part of the first connecting rod 9 is hinged to the driving plate 2; the other end 9d of the first connecting rod 9 is hinged to the middle part of the second connecting rod 10; one end 10c of the second connecting rod 10 is hinged to the second stopper 5a and the second oblong hole 41b through the second limiting oblong hole 13; the other end 10d of the second connecting rod 10 is hinged to the third stopper 5c and the third oblong hole 41c through the third limiting oblong hole 16. A moving pair along a set direction is formed between the driving plate 2 and the base 1. In practice, the first limiting oblong hole 11 and / or the second limiting oblong hole 13 and / or the third limiting oblong hole 16 can also be replaced by a round hole or an oblong hole with a larger diameter, respectively. The difference is that when a round hole with a slightly larger diameter is used, the limiting effect is unstable, which easily leads to deviations in the restriction on the free end of the connecting rod. In some cases, it may also lead to limiting errors. For example, in order to provide sufficient activity space in the length direction, the width direction of the round hole with a slightly larger diameter is required to be the same as its length in the length direction. However, at this time, since its length in the width direction is greater than its necessary width, not only does it require a larger pin head diameter of the hinge pin shaft at the free end of the connecting rod mechanism, but also, when the connecting rod mechanism is transmitted, it will also cause the driving plate 2 to provide a larger driving displacement due to insufficient thrust at the edge of the limiting hole diameter. If the limiting hole is designed as a long hole, when the hinge pin at the free end of the connecting rod mechanism moves to the end point of the long hole, the contact area between the hinge pin at the free end of the connecting rod mechanism and the edge of the long hole is smaller. Although it will not cause the problem of requiring the drive plate 2 to provide a larger driving displacement, the transition of the hinge pin at the end point of the long hole is not smooth enough, which can easily reduce the operator's comfort.Therefore, the preferred limiting holes in this embodiment include a first limiting oblong hole 11, a second limiting oblong hole 13 and a third limiting oblong hole 16. In this case, the three-lock and two-release lock provided in this embodiment has three three-lock and two-release situations. Among them:

[0068] In the first situation, the first lock 4a and the second lock 4b are in the unlocking position, and the third lock 4c is in the locking position. Fig.14 As shown, since the first connecting rod 9 is hinged to the driving plate 2 through its inflection point α, at this time, when the driving plate 2 is subjected to a horizontal leftward force, the hinge pin 15 also moves to the left. In this case, the first connecting rod 9 follows the driving plate 2 to move to the left, and also rotates counterclockwise with the hinge pin 15 as the rotation center. During this counterclockwise rotation, the hinge pin 18 rotates counterclockwise and deflects downward at the same time. At this time, the first limiting oblong hole 11 provides a counterclockwise rotation space for the first end 9c of the first connecting rod 9, the second limiting oblong hole 13 provides a counterclockwise rotation and downward displacement space for the first end 10c of the second connecting rod 10, and the third limiting oblong hole 16 provides a counterclockwise rotation and downward displacement space for the second connecting rod 10d. At this time, since the third lock 4c is in the locked position, the hinge pin 17 cannot move to the left, and finally, the first stopper 5a and the second stopper 5b move to the left to achieve unlocking.

[0069] In the second case, the second lock 4b and the third lock 4c are in the unlocking position, and the first lock 4a is in the locking position. Since the first connecting rod 9 is hinged to the driving plate 2 through its inflection point α, at this time, when the driving plate 2 is subjected to a horizontal force to the left, the hinge pin 15 also moves to the left. In this case, since the first lock 4a is in the locking position, the hinge pin 12 cannot move to the left. While the first connecting rod 9 rotates with the hinge pin 15 as the rotation center, it drives the hinge pin 18 to rotate clockwise. At the same time, the hinge pin 18 also deviates upward at the same time. At this time, the first limiting oblong hole 11 provides a clockwise rotation space for the first end 9c of the first connecting rod 9, the second limiting oblong hole 13 provides a clockwise rotation and upward displacement space for the first end 10c of the second connecting rod 10, and the third limiting oblong hole 16 provides a clockwise rotation and upward displacement space for the second connecting rod 10d. Finally, the second stopper 5b and the second stopper 5c move to the left to achieve unlocking.

[0070] In the third case, the first lock 4a and the third lock 4c are in the unlocked position, and the second lock 4b is in the locked position. Since the first connecting rod 9 is hinged to the drive plate 2 through its inflection point α, at this time, when the drive plate 2 is subjected to a horizontal force to the left, the hinge pin 15 also moves to the left. In this case, since the second lock 4b is in the locked position, that is, the hinge pin 14 cannot move to the left, at this time, the first connecting rod 9 moves horizontally to the left, so that the hinge pin 18 moves to the left accordingly. At this time, in order to balance the leftward movement of the hinge pin 18, the second connecting rod 10 rotates clockwise with the hinge pin 18 as the rotation center. The second limiting oblong hole 13 provides a moving space for the clockwise rotation of the first end 10c of the second connecting rod 10, and the third limiting oblong hole 16 provides a moving space for the clockwise rotation of the second end 10d of the second connecting rod 10. Finally, the first stopper 5a and the third stopper 5c move to the left to achieve unlocking.

[0071] In some examples, a side wing 6 extending outward may be provided on one side of the stopper 5, and the height of the side wing 6 is higher than the bottom surface height of the lock tongue of the lock 4; when any one of the three locks 4 is locked, the side wing 6 of one of the three stoppers 5 can abut against the lock tongue of the lock 4 in the locked state and remain stationary. In this embodiment, a first side wing 6a is provided on the first stopper 5a in a direction close to the first lock tongue 30a, and the height of the first side wing 6a is higher than the bottom surface height of the first lock tongue 30, so that when the first lock 4a is in the locked position, the first side wing 6a abuts against the first lock tongue 30a. A second side wing 6b is provided on the second stopper 5b in a direction close to the second lock tongue 30b, and the height of the second side wing 6b is higher than the bottom surface height of the second lock tongue 30, so that when the second lock 4b is in the locked position, the second side wing 6b abuts against the second lock tongue 30b. A third side wing 6c is provided on the third stopper 5c in the direction close to the third lock tongue 30c, and the height of the third side wing 6c is higher than the bottom height of the third lock tongue 30, so that when the third lock 4c is in the locked position, the third side wing 6c abuts against the third lock tongue 30c. In this case, when the lock tongue of the lock 4 is in the locked position, the side wing 6 of the stopper 5 cannot move to the left due to the bottom height of the lock tongue 30, thereby failing to realize the unlocking of the three-lock and two-unlock lock provided by the embodiment of the present invention. In addition, when the lock tongue of the lock 4 is in the unlocking position, the side wing 6 can be placed under the lock tongue, so as to resist the lock tongue and prevent the lock 4 from automatically falling.

[0072] In some examples, the three-lock and two-open lockset may further include a pressing plate 7 and a pin; the pressing plate 7 is connected to the base 1 through the pin and is opposite to the lock tongue of the lock 4; the stopper 5 is sleeved on the pin through an oblong hole provided thereon, the oblong hole extends along the unlocking direction, the stopper 5 is between the pressing plate 7 and the base 1), and can move relative to the pin in the long strip hole along its length direction. In this embodiment, the pressing plate 7 includes a first pressing plate 7a, a second pressing plate 7b, and a third pressing plate 7c, and the pin includes a first pin, a second pin, and a third pin. The first stopper 5a is provided with a seventh oblong hole 8a along the set direction, the second stopper 5b is provided with an eighth oblong hole 8b along the set direction, and the third stopper 5c is provided with a ninth oblong hole 8c along the set direction. The first pressing piece 7a is fixedly connected to the base 1 through the first pin shaft, the first pressing piece 7a is fixedly connected to the base 1 and is located in the first gap, the radial dimension of the first pressing piece 7a is greater than the radial dimension of the seventh oblong hole 8a, the first stopper 5a is locked on the first pin shaft through the seventh oblong hole 8a, so that the first stopper 5a is located between the first pressing piece 7a and the base 1. The second pressing piece 7b is fixedly connected to the base 1 through the second pin shaft, the second pressing piece 7b is fixedly connected to the base 1 and is located in the first gap, the radial dimension of the second pressing piece 7b is greater than the radial dimension of the eighth oblong hole 8b, the second stopper 5b is locked on the second pin shaft through the eighth oblong hole 8b, so that the second stopper 5b is located between the second pressing piece 7b and the base 1. The third pressing piece 7c is fixedly connected to the base through the third pin shaft, the third pressing piece 7c is fixedly connected to the base 1 and is located in the third gap, the radial dimension of the third pressing piece 7c is greater than the radial dimension of the ninth oblong hole 8c, and the third stopper 5c is locked on the third pin shaft through the ninth oblong hole 8c, so that the third stopper 5c is located between the third pressing piece 7c and the base 1. In this case, the setting of the first pressing piece 7a can prevent the first stopper 5a from tilting up from the base 1, the setting of the second pressing piece 7b can prevent the second stopper 5b from tilting up from the base 1, and the setting of the third pressing piece 7c can prevent the third stopper 5c from tilting up from the base 1. In addition, in order to prevent the first pressing piece 7a from rotating relative to the first stopper 5a, the first pin shaft includes two; in order to prevent the second pressing piece 7b from rotating relative to the second stopper 5b, the second pin shaft includes two; in order to prevent the third pressing piece 7c from rotating relative to the third stopper 5c, the third pin shaft includes two.

[0073] In some examples, the three-lock and two-release lockset may further include a fourth pressing plate 19, a fourth pin and a fifth pin. The drive plate 2 is provided with a tenth oblong hole 20 and an eleventh oblong hole 25 along a set direction. The fourth pressing plate 19 is fixedly connected to the base 1 via a fourth pin. The fourth pressing plate 19 is fixedly connected to the base 1, and the radial dimension of the fourth pressing plate 19 is greater than the radial dimension of the tenth oblong hole 20. The drive plate 2 is locked on the fourth pin via the tenth oblong hole 20, so that the drive plate 2 is between the fourth pressing plate 19 and the base 1. The fifth pin is penetrated through the eleventh oblong hole 25. In this case, the arrangement of the tenth oblong hole 20 and the eleventh oblong hole 25 can guide the drive plate 2 when it is subjected to a force in the first direction, thereby preventing the drive plate 2 from deflecting during movement after being subjected to the force.

[0074] In some examples, the driving mechanism may include a bolt plate 3, a first rotating shaft 52, a gear 29 and a rack 28; the bolt plate 3 is connected to the driving plate 2; the rack 28 is arranged on the bolt plate 3 and extends along the unlocking direction; the torque is transmitted between the gear 29 and the first rotating shaft 52, and the first rotating shaft 52 is arranged on the bolt plate 3; the rack 28 is meshed with the gear 29; when the first rotating shaft 52 is rotated, the rack 28 drives the bolt plate 3 to move along the unlocking direction. In this case, the gear 29 and the rack 28 constitute a gear rack transmission mechanism, which is characterized in that the rotational power provided to the gear 29 can be converted into linear motion of the rack 28 with the help of the gear rack transmission mechanism. At this time, since the plane where the rack 28 is located corresponds to the plane where the drive plate 2 is located, when the gear 29 is subjected to counterclockwise rotational power, the rack 28 meshing with the gear 29 can be forced to move to the left. When the rack 28 moves to the left and contacts the drive plate 2, it continues to provide a counterclockwise rotational force to the gear 29, which can cause the rack 28 to be subjected to a force to the left.

[0075] In some examples, the three-lock and two-unlock device may also include a second rotating shaft 39, the diameter of the second rotating shaft 39 is greater than the diameter of the first rotating shaft 52, and the second rotating shaft 39 is fixedly connected to the first rotating shaft 52, so that there is no relative rotation between the first rotating shaft 52 and the second rotating shaft 39. Generally, in order to adapt to the shaft hole gear of the gear 29, the diameter of the first rotating shaft 52 is relatively small, that is, the lever arm is short. In this case, in order to enable the gear 29 to rotate, under the condition of a constant torque, a larger rotational force needs to be applied to the first rotating shaft. In the case of adding a second rotating shaft 39, since the diameter of the second rotating shaft 39 is greater than the diameter of the first rotating shaft 52, that is, the setting of the second rotating shaft 52 increases the length of the lever arm. At this time, under the condition of a constant torque, a smaller force needs to be applied to the second rotating shaft 39, in other words, a smaller unlocking force is required. In addition, the three-lock and two-unlock device provided in the embodiment of the present invention also includes a plurality of connecting handles 40, which are radially arranged on the circumference of the second rotating shaft 39. Since the second rotating shaft 39 is cylindrical, it is easy for the side wall of the second rotating shaft 39 to slip during the process of applying a rotational torque to the second rotating shaft 39. The setting of the connecting handle 40 can reduce the slipping phenomenon during the process of applying a rotational torque to the second rotating shaft 39, making the application of the rotational torque more convenient.

[0076] In some examples, the driving plate 2 is provided with two guide oblong holes 21 which are opposite to each other and inclined in the length direction; the three-lock and two-release lockset may also include two sets of protection components, and the protection components may include a limit moving piece 34 and a limit block 31; one end of the limit moving piece 34 is hinged to the bolt plate 3, and the other end of the limit moving piece 34 is hinged in the guide oblong hole 21; the limit block 31 is provided on the base 1, and a limit protrusion 32 is provided on it;

[0077] One end of the guiding oblong hole 21 corresponds to the limiting surface 33 of the limiting protrusion 32 , and the other end of the guiding oblong hole 21 is outwardly away from the limiting surface 33 .

[0078] In the above embodiment, the three-lock and two-release lockset further includes a first limit movable member 34a, a first limit block 31a, a first movable pin body 37a, and a second limit movable member 34b, wherein the first limit movable member 34a and the second limit movable member 34b are symmetrically arranged, and the first limit block 31a and the second limit movable member 31b are symmetrically arranged. The driving plate 2 is provided with a first guide oblong hole 21 and a second guide oblong hole 23. One end of the first limit movable member 34a is hinged to the bolt plate 3, and the other end of the first limit movable member 34a is hinged to the first guide oblong hole 21; one end of the second limit movable member 34b is hinged to the bolt plate 3, and the other end of the second limit movable member 34b is hinged to the second guide oblong hole 23. The first limit block 31a is provided with a first limit protrusion 32a, and the second limit block 31b is provided with a second limit protrusion 32b. The length direction of the first guide oblong hole 21 is inclined, so that one end of the first guide oblong hole 21 corresponds to the first limiting surface 33a of the first limiting protrusion 32a, and the other end of the first guide oblong hole 21 is outwardly away from the first limiting surface 33a; the length direction of the second guide oblong hole 21 is inclined, so that one end of the second guide oblong hole 21b corresponds to the second limiting surface 33b of the second limiting protrusion 32b, and the other end of the second guide oblong hole 21b is outwardly away from the second limiting surface 33b. Fig.15 Taking the direction as an example, once the leftward force applied to the bolt plate 3 exceeds the limit value, the hinge pin 36 is restricted by the direction of the guide oblong hole 21, so that the limit movable member 34 rotates counterclockwise with the hinge pin 36 as the rotation center during the leftward movement. When the limit movable member 34 moves to one end of the guide oblong hole 21, since this one end corresponds to the limit surface 33 of the limit protrusion 32, after the fixed point of the limit movable member 34 touches the limit surface 33, due to the limiting effect of the limit surface 33, the bolt plate 3 can be prevented from continuing to move to the left when the leftward force exceeds the limit value, thereby playing a protective role.

[0079] In some examples, the limit block 31 may include a limit fixing member 56, a pin body 37, an elastic member 47 and a blocking member 48; the limit fixing member 56 is provided with a first through hole 57, and the blocking member 48 is provided with a second through hole 49;

[0080] The blocking member 48 blocks one end of the first through hole 57; one end of the pin body 37 passes through one end of the first through hole 57, and the other end of the pin body 37 passes through the second through hole 49, and the elastic member 47 is blocked in the first through hole 57 by the blocking member 48; the pin body 37 contacts and supports the limit movable member 34. Under normal conditions, due to the limiting effect of the elastic member 47, the pin body 37 is in a suspended state and supports the limit movable member 34, which can prevent the limit movable member 34 from accidentally sliding to one end of the guide oblong hole 21 and preventing the bolt plate 3 from moving leftward without receiving a force exceeding the limit value. When the force exceeding the limit value has been applied, the limit movable member 34 rotates counterclockwise with the hinge pin 36 as the rotation center during its movement to the left, that is, the pin body 37 is pressed down, and the elastic member 47 is placed in a compressed state. After that, once the force exceeding the limit value is released, the limit movable member 34 can be easily reset with the help of the elastic force of the elastic member 47. In this embodiment, the elastic member 47 is a cylindrical spring. In this embodiment, the pin body 37 and the contact 38 of the limit movable member 34 are hemispherical. In this case, the isotropic property of the contact 38 can be used to reduce the wear at the contact 38, thereby increasing the service life of the pin body 37. In addition, with the attached Fig.15 Taking an example to illustrate, the left contact surface of the limit movable member 34 is inclined from the apex 35 to the upper right. In this case, even if the apex of the limit movable member 34 has contacted the limit surface 33, the leftward force applied to the bolt plate 3 is still increasing. Since the left contact surface of the limit movable member 34 is inclined from the apex 35 to the upper right, it can continue to rotate counterclockwise at a very small angle with the hinge pin shaft 36 as the rotation center, thereby playing a buffering role and improving the service life of the limit movable member 34.

[0081] In some examples, the top of the first through hole 57 may be provided with an inward first annular shoulder 46, and the pin body 37 may be provided with an outward second annular shoulder 51; the inner diameter of the first annular shoulder 46 is equal to the diameter of the pin body 37 and the inner diameter of the second through hole 49; the outer diameter of the elastic member 47 is equal to the inner diameter of the first through hole 57. It should be noted that the "equal" mentioned here can be understood as matching, so that the first annular shoulder 46, the pin body 37 and the second through hole 49 can be assembled reliably, and the elastic member 47 and the first through hole 57 can be assembled reliably. Such a structural setting can make the pin body 37 move in the first through hole 57 in the process of axial movement, under the restriction of the inner diameter of the first annular shoulder 46, the diameter of the pin body 37 and the inner diameter of the second through hole 49, always move in a straight line without deflection, and can avoid the phenomenon of difficulty in resetting caused by deflection during the movement of the pin body 37.

[0082] An embodiment of the present invention further provides a locking device, which includes the above-mentioned three-lock and two-release lock.

[0083] The locking device provided by an embodiment of the present invention comprises a three-lock and two-unlocking lockset, in which the three locks and a driving mechanism are respectively arranged on a base, a linkage mechanism is movably arranged on the base and connected to the driving mechanism, and the lock tongues of the three locks are respectively separated from the linkage mechanism and the driving mechanism, so that when any two of the three locks are unlocked to form an unlocking position, the driving mechanism can drive the linkage mechanism to move to the unlocking position to achieve unlocking.

[0084] Compared with the prior art, the three-lock and two-unlock lock provided by the embodiment of the present invention has three locks whose lock tongues are separately arranged from the linkage mechanism and the driving mechanism, instead of being connected to the two, and the driving mechanism applies an unlocking force to the linkage mechanism, so that the linkage mechanism moves to the unlocking position of the lock to achieve unlocking, so that the unlocking direction of the lock is from the driving end to the lock end, instead of from the lock end to the driving end. The unlocking method formed in this way not only solves the problem that the lock cannot be unlocked when replaced with an electronic lock in the prior art, but also makes the structure of the lock simpler, unlocking more convenient, and reducing costs. In addition, the three-lock and two-unlock lock provided by the embodiment of the present invention can also achieve normal unlocking when one of the three locks fails, without the need to destroy the relevant structure of the lock for abnormal unlocking, which is more convenient to use.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A three-lock and two-release lock, characterized in that: It comprises a base (1), three locks (4), a linkage mechanism and a driving mechanism, wherein the driving mechanism is connected to the linkage mechanism; The three locks (4) and the driving mechanism are respectively arranged on the base (1); the linkage mechanism is movably arranged on the base (1); The lock tongues of the three locks (4) are respectively separated from the linkage mechanism and the drive mechanism; When any two locks (4) among the three locks (4) are unlocked, an unlocking position is formed, and the driving mechanism can drive the linkage mechanism to move to the unlocking position; When any two locks (4) among the three locks (4) are unlocked, the unlocking positions can be formed at their original lock tongue positions respectively; The linkage mechanism comprises a drive plate (2) and three stoppers (5) connected to the drive plate (2); the drive plate (2) and the three stoppers (5) are respectively movably arranged on the base (1), and the drive plate (2) is connected to the bolt plate (3); When any two locks (4) among the three locks (4) are unlocked, the driving mechanism can drive two of the three stoppers (5) to move to the unlocking positions of the two locks (4) in the unlocking state respectively; The linkage mechanism further comprises a first connecting rod (9) and a second connecting rod (10); The middle portion of the first connecting rod (9) has a first inflection point (α), and the first connecting rod (9) is hingedly connected to the driving plate (2) via the first inflection point (α); The middle portion of the second connecting rod (10) has a second inflection point (β), and the second connecting rod (10) is hingedly connected to one end of the first connecting rod (9) via the second inflection point (β); One end of one of the three stoppers (5) is hinged to a limiting hole provided at the other end of the first connecting rod (9), and one end of the other two stoppers (5) are respectively hinged to limiting holes provided at both ends of the second connecting rod (10); The driving plate (2) is provided with two guiding oblong holes (21) which are opposite to each other and inclined in the length direction; The three-lock and two-release lockset also includes two sets of protection components, the protection components including a limit moving member (34) and a limit block (31); One end of the position-limiting movable member (34) is hinged to the bolt plate (3), and the other end of the position-limiting movable member (34) is hinged to the guide oblong hole (21); The limit block (31) is arranged on the base (1), and a limit protrusion (32) is arranged on the limit block; One end of the guide oblong hole (21) corresponds to the limiting surface (33) of the limiting protrusion (32), and the other end of the guide oblong hole (21) is outwardly away from the limiting surface (33); The limit block (31) comprises a limit fixing member (56), a pin body (37), an elastic member (47) and a blocking member (48); The limiting member (56) is provided with a first through hole (57), and the blocking member (48) is provided with a second through hole (49); The blocking member (48) blocks one end of the first through hole (57); One end of the pin body (37) passes through one end of the first through hole (57), and the other end of the pin body (37) passes through the second through hole (49), and the elastic member (47) is blocked in the first through hole (57) by the blocking member (48); The pin body (37) contacts and supports the position-limiting movable member (34).

2. The three-lock and two-release lock according to claim 1, characterized in that: A side wing (6) extending outward is provided on one side of the blocking member (5), and the height of the side wing (6) is higher than the bottom surface of the lock tongue of the lock (4); When any one of the three locks (4) is locked, the side wing (6) of one of the three stoppers (5) can abut against the lock tongue of the lock (4) in the locked state and fix it immobile.

3. The three-lock and two-release lock according to claim 1, characterized in that: Also includes: A pressing piece (7) and a pin; The pressing plate (7) is connected to the base (1) via the pin shaft and is opposite to the lock tongue of the lock (4); The blocking member (5) is sleeved on the pin shaft via an oblong hole provided thereon, the oblong hole extending in the unlocking direction, the blocking member (5) is located between the pressing plate (7) and the base (1), and can move relative to the pin shaft in the oblong hole along its length direction.

4. The three-lock and two-release lock according to claim 1, characterized in that: The driving mechanism comprises a bolt plate (3), a first rotating shaft (52), a gear (29) and a rack (28); The bolt plate (3) is connected to the drive plate (2); The rack (28) is arranged on the bolt plate (3) and extends along the unlocking direction; Torque is transmitted between the gear (29) and the first rotating shaft (52), and the first rotating shaft (52) is arranged on the bolt plate (3); The rack (28) is meshingly connected with the gear (29); When the first rotating shaft (52) is rotated, the rack (28) drives the bolt plate (3) to move in an unlocking direction.

5. The three-lock and two-release lock according to claim 1, characterized in that: A first annular shoulder (46) is provided inwardly at the top of the first through hole (57), and a second annular shoulder (51) is provided outwardly on the pin body (37); The inner diameter of the first annular shoulder (46) is equal to the diameter of the pin body (37) and the inner diameter of the second through hole (49); The outer diameter of the elastic member (47) is equal to the inner diameter of the first through hole (57).

6. A locking device, characterized in that: The locking device comprises the three-lock and two-release lock as claimed in any one of claims 1 to 5.

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