Mechanical door lock and its operating mechanism

Abstract

The present invention discloses an operating mechanism for a mechanical door lock, which includes a door handle rotatably engaged with the housing of the door lock, and a top piece toggle block, a limit toggle block, a top piece, a sliding block and a function knob arranged inside the housing; the top piece toggle block and the limit toggle block are coaxially connected to the door handle; the circumferential surface of the limit toggle block faces the sliding rod of the door lock; the top piece is arranged on the circumferential surface of the top piece toggle block and faces the lock piece of the door lock; when the door handle rotates, it drives the sliding rod and the lock piece to move linearly; the sliding block is arranged on the circumferential surface of the limit toggle block to limit the rotation angle of the limit toggle block; the function knob penetrates through the housing, and one end of it is provided with a first cam movably engaged with the top piece and a second cam movably engaged with the sliding block. When the first cam rotates, it adjusts the stroke of the top piece, and when the second cam rotates, it drives the sliding block to move relative to the limit toggle block; the other end of the function knob is provided with an operation part. The present invention can simplify the user operation, can perform code searching and code changing with one hand, and improve the user experience.

Description

Technical Field

[0001] The invention relates to the technical field of key-pressed password locks, in particular to a mechanical door lock and an operating mechanism thereof. Background Art

[0002] The push-button password lock combines the advantages of electronic locks and key mechanical locks - users can use the password to unlock the lock without carrying keys with them, which is more convenient and quicker. At the same time, the lock relies on the linkage relationship of a purely mechanical structure to realize the relevant functions of the lock. Its functions are more stable and there is no risk of the lock being scrapped due to electronic failure.

[0003] Prior to the application date of the present invention, the applicant of this case improved and applied for a reference patent for the disadvantage that the operation of changing the password of the existing key password lock is relatively troublesome. Fig.33 The utility model patent "A code-changing structure for key-press combination lock" (publication number CN213683571U) shown in the patent, in which the user rotates the knob 4' to the second angle (code-changing angle), and the lock plate 3' can move toward the knob 4' under the action of the linkage component 5' so that its notch 31' gives way to the axial movement of the button 10', and the button 10' can be pressed to the code-changing height, and through the linkage relationship between the button 10' and the code button 8', and the code button 8' and the key slot 13' of the lock seat 1', the code button 8' is rotated to change the code, thereby greatly simplifying the user's operation of changing the password, without the need to disassemble the lock, and therefore obtaining authorization.

[0004] In order to prevent the user from rotating the knob 4' excessively and causing the password to be changed due to misoperation during normal use, the linkage assembly 5' of the patent also includes a limit switch 54' and a limit ring 55' for limiting the rotation of the knob 4'. The knob 4' can only be rotated to the second angle when the limit switch 54' is turned on. However, in the patent, the limit switch 54' is set on the same side of the knob 4'. When the user needs to change the password, he needs to keep the knob 4' at the second angle and the limit switch 54' in the turned-on state with one hand, and press the button 10' with the other hand to change the password. The operation is extremely difficult and the user experience is poor. Summary of the invention

[0005] The object of the present invention is to provide a mechanical door lock and an operating mechanism thereof, which can simplify operations such as unlocking, searching for codes and changing codes for users, can be performed with one hand, and improve user experience.

[0006] In order to achieve the above object, one of the solutions of the present invention is:

[0007] A mechanical door lock operating mechanism, comprising a door handle rotatably matched with a housing of the door lock, and a top plate toggle block, a limit toggle block, a top plate, a sliding block and a function knob arranged in the housing; the top plate toggle block and the limit toggle block are coaxially connected to the door handle; the circumferential surface of the limit toggle block is arranged opposite to the sliding rod of the door lock; the top plate is arranged on the circumferential surface of the top plate toggle block and is arranged opposite to the lock plate of the door lock; when the door handle is rotated, the sliding rod and the lock plate are linked to move linearly; the sliding block is arranged on the circumferential surface of the limit toggle block to limit the rotation angle of the limit toggle block; the function knob rotatably passes through the housing, and one end of the function knob is provided with a first cam movably matched with the top plate and a second cam movably matched with the sliding block, the first cam adjusts the stroke of the top plate when it rotates, and the second cam drives the sliding block to limit or unlock the rotation angle of the limit toggle block when it rotates; the other end of the function knob is provided with an operating part for user operation.

[0008] The rotation process of the function knob is provided with a first angle, a second angle and a third angle; when the function knob is at the first angle, the short axis of the first cam abuts against the top plate, and the long axis of the second cam abuts against the sliding block; when the function knob is at the second angle, the short axis of the first cam abuts against the top plate, and the short axis of the second cam abuts against the sliding block; when the function knob is at the third angle, the long axis of the first cam abuts against the top plate, and the long axis of the second cam abuts against the sliding block.

[0009] The circumferential surface of the top sheet toggle block is provided with a first cam wall and a first notch; the top sheet is provided with a first convex portion arranged opposite to the circumferential surface of the top sheet toggle block, and the first convex portion movably cooperates with the first cam wall or the first notch as the top sheet toggle block rotates.

[0010] The circumferential surface of the limit-shift block is provided with a second cam wall and a second notch for the end of the sliding rod to cooperate with, and the end of the sliding rod movably cooperates with the second cam wall or the second notch as the limit-shift block rotates.

[0011] The circumferential surface of the limit toggle block is recessed to form an arc-shaped groove for the sliding block to flexibly cooperate with, and retaining walls are arranged at both ends of the arc-shaped groove. The sliding block is provided with a second convex portion arranged opposite to the circumferential surface of the limit toggle block, and the second convex portion moves between the retaining walls at both ends of the arc-shaped groove as the limit toggle block rotates.

[0012] The side edge of the top sheet is provided with a wing sheet which is arranged opposite to the end of the locking sheet and is used to push the locking sheet.

[0013] Both ends of the sliding block are provided with mounting grooves on one side facing the limit-shifting block, and slider springs are provided in the mounting grooves. The slider springs are used to provide elastic force to keep the sliding block away from the limit-shifting block.

[0014] The operating portion passes through the mounting surface of the housing.

[0015] The operating mechanism also includes an emergency component, which includes an emergency lock core, a rotating disk, a sliding pin, a third cam and an emergency spring; the door handle is provided with a mounting hole for assembling the emergency lock core; the top plate toggle block is provided with a rotating groove for rotatably engaging with the rotating disk, and a third notch is provided at the periphery of the rotating groove; the rotating disk is coaxially connected to the limit toggle block, and is provided with a sliding groove for slidably engaging with the sliding pin, and a fourth notch is provided on the side wall of the sliding groove; the sliding pin is provided with a third convex portion movably inserted into the fourth notch and the third notch; the third cam is rotatably engaged in the sliding groove and abuts against the opposite side of the third convex portion of the sliding pin, and the movable end of the emergency lock core is inserted into the limit toggle block and is coaxially connected to the third cam; the emergency spring is provided in the fourth notch between the sliding pin and the sliding groove.

[0016] Preferably, the rotating disk is provided with a connecting portion rotatably passing through the top plate toggle block, and the connecting portion is connected to the square rod of the door lock.

[0017] Preferably, the emergency component also includes a fixing frame and a fixing plate arranged in the mounting hole for mounting the emergency lock core; the fixing frame is locked in the mounting hole; the emergency lock core is installed in the fixing frame, and the fixing plate is closed at the open end of the fixing frame.

[0018] The operating mechanism also includes a torsion spring for driving the door handle to reset.

[0019] The second solution of the present invention is:

[0020] A mechanical door lock comprises a shell for assembling the operating mechanism, a sliding rod and a locking plate matched with the operating mechanism, and a key assembly matched with the sliding rod and the locking plate; the locking plates and several groups of key assemblies are arranged on both sides of the sliding rod.

[0021] After adopting the above technical solution, the present invention has the following technical effects:

[0022] By setting a top plate toggle block, a limit toggle block and a top plate, the door handle and the sliding rod and lock plate of the door lock are linked, and a rotatable function knob is set in the shell. The first cam and the second cam of the function knob are used to limit the travel of the lock plate and control the rotation restriction of the limit toggle block by the sliding block, so that the user can switch and maintain the normal opening and closing lock, password retrieval, password replacement and other states of the door lock only by turning the function knob. It can be achieved with one hand operation, which makes the operation easier and the user experience better. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A three-dimensional diagram of a specific embodiment of the present invention;

[0024] Figure 2 An exploded view of a specific embodiment of the present invention;

[0025] Figure 3 It is a three-dimensional diagram of a locking plate toggle block according to a specific embodiment of the present invention;

[0026] Figure 4 It is a three-dimensional diagram of a limit-shifting block according to a specific embodiment of the present invention;

[0027] Figure 5 The top sheet of the specific embodiment of the present invention is three-dimensional Figure 1 ;

[0028] Figure 6 The top sheet of the specific embodiment of the present invention is three-dimensional Figure 2 ;

[0029] Figure 7 A three-dimensional diagram of a sliding block according to a specific embodiment of the present invention;

[0030] Figure 8 It is a three-dimensional diagram of a functional knob according to a specific embodiment of the present invention;

[0031] Fig. 9 A three-dimensional diagram of a sliding rod according to a specific embodiment of the present invention;

[0032] Fig.10 A three-dimensional diagram of a rotating disk according to a specific embodiment of the present invention;

[0033] Fig.11 It is a schematic diagram of the synchronization state of the locking plate toggle block and the rotating disk in a specific embodiment of the present invention;

[0034] Fig.12 It is a schematic diagram of the asynchronous state of the locking plate toggle block and the rotating disk according to a specific embodiment of the present invention;

[0035] Fig.13 It is a front view of a normal initial state of a specific embodiment of the present invention;

[0036] Fig.14It is a cross-sectional view of a normal initial state of a specific embodiment of the present invention;

[0037] Fig.15 The normal initial state stereoscopic of the specific embodiment of the present invention Figure 1 ;

[0038] Fig.16 The normal initial state stereogram of the specific embodiment of the present invention Figure 2 ;

[0039] Fig.17 It is a back view of a normal initial state of a specific embodiment of the present invention;

[0040] Fig.18 It is a front view of the unlocking completion state of a specific embodiment of the present invention;

[0041] Fig.19 It is a cross-sectional view of the unlocking completion state of a specific embodiment of the present invention;

[0042] Fig. 20 The unlocking completion state of a specific embodiment of the present invention is shown in FIG. Figure 1 ;

[0043] Fig.21 The unlocking completion state of a specific embodiment of the present invention is shown in FIG. Figure 2 ;

[0044] Fig. 22 It is a rear view of the unlocking completion state of a specific embodiment of the present invention;

[0045] Fig.23 It is a front view of the password recovery state of a specific embodiment of the present invention;

[0046] Fig.24 It is a cross-sectional view of a password recovery state of a specific embodiment of the present invention;

[0047] Fig.25 The password recovery state stereogram of the specific embodiment of the present invention Figure 1 ;

[0048] Fig.26 The password recovery state stereogram of the specific embodiment of the present invention Figure 2 ;

[0049] Fig. 27 It is a back view of the password recovery state of a specific embodiment of the present invention;

[0050] Fig.28 It is a front view of the replacement cipher state of a specific embodiment of the present invention;

[0051] Fig.29 It is a cross-sectional view of a replacement cipher state of a specific embodiment of the present invention;

[0052] Fig.30 The permutation cipher state stereogram of the specific embodiment of the present invention is Figure 1 ;

[0053] Fig.31 The permutation cipher state stereogram of the specific embodiment of the present invention is Figure 2 ;

[0054] Fig.32 It is a rear view of the replacement cipher state of a specific embodiment of the present invention;

[0055] Fig.33 This is the exploded view of patent CN213683571U;

[0056] Description of Figure Numbers:

[0057] 1----shell; 11---lock shell; 12---lock body; 121--key slot; 13---bottom plate; 14---pressing plate; 15---pressing block;

[0058] 2----Door handle; 21---Mounting hole;

[0059] 3----top sheet toggle block; 31---first cam wall; 32---first notch; 33---rotation groove; 34---third notch;

[0060] 4----limiting toggle block; 41---second cam wall; 42---second notch; 43---arc groove; 44---blocking wall;

[0061] 5----top piece; 51---first convex part; 52---wing piece;

[0062] 6----sliding block; 61---second convex portion; 62---installing groove;

[0063] 7----Function knob; 71---First cam; 72---Second cam; 73---Operation part;

[0064] 8----Sliding rod; 81---Snap buckle;

[0065] 9----Lock plate;

[0066] 10---Slider spring;

[0067] 20---Emergency assembly; 201--Emergency lock core; 202--Rotating plate; 2021-Sliding groove; 2022-Fourth notch; 2023-Connecting part; 203---Sliding pin; 2031-Third convex part; 204---Third cam; 205--Emergency spring; 206--Fixed frame; 207--Fixed plate;

[0068] 30---Dust cover;

[0069] 40---square rod;

[0070] 50---torsion spring;

[0071] 60---button assembly; 601--reset spring; 602--button rod; 603--button spring; 604--button cap;

[0072] 70---Sliding rod spring;

[0073] 80---Lock spring. Implementation

[0074] In order to further explain the technical solution of the present invention, the present invention is described in detail below through specific embodiments.

[0075] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0076] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of the present invention to be protected.

[0077] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0078] In the description of the embodiments of the present invention, it should be understood that the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the invention is usually placed when in use, or is the orientation or position relationship commonly understood by those skilled in the art. It is only to simplify the description for the convenience of describing the embodiments of the present invention, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0079] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0080] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0081] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0082] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0083] Furthermore, the present invention provides examples of various specific processes and materials, but a person skilled in the art may recognize the application of other processes and / or the use of other materials.

[0084] refer to Figures 1 to 32 As shown, the present invention discloses an operating mechanism of a mechanical door lock, comprising a door handle 2 rotatably matched with a housing 1 of the door lock, and a top plate toggle block 3, a limit toggle block 4, a top plate 5, a sliding block 6 and a function knob 7 arranged in the housing 1;

[0085] The top plate toggle block 3 and the limit toggle block 4 are coaxially connected with the door handle 2 to achieve synchronous rotation;

[0086] The circumference of the limit toggle block 4 is arranged opposite to the sliding rod 8 of the door lock; the top plate 5 is arranged on the circumference of the top plate toggle block 3 and is arranged opposite to the lock plate 9 of the door lock; when the door handle 2 is rotated, the sliding rod 8 and the lock plate 9 are linked to move linearly to correspond to operations such as unlocking, retrieving passwords, and replacing passwords;

[0087] The sliding block 6 is arranged on the circumference of the limit toggle block 4, and is used to limit the rotation angle of the limit toggle block 4, that is, to limit the rotation angle of the door handle 2, so as to prevent the door handle from rotating excessively to the corresponding angle of retrieving the password or replacing the password when the door lock is normally used, thereby preventing the password from being changed by mistake;

[0088] The function knob 7 rotatably penetrates the shell 1, and one end of the function knob 7 is provided with a first cam 71 movably engaged with the top plate 5 and a second cam 72 movably engaged with the sliding block 6. When the first cam 71 rotates, it adjusts the stroke of the top plate 5 to adjust the stroke of the locking plate 9, and when the second cam 72 rotates, it drives the sliding block 6 to limit or unlock the rotation angle of the limit toggle block 4; the other end of the function knob 7 is provided with an operating part 73 for user operation, so that the function knob 7 can be rotated using tools or manually.

[0089] The specific implementation of the above-mentioned operating mechanism is shown below.

[0090] The rotation process of the above-mentioned function knob 7 is provided with a first angle, a second angle and a third angle; when the function knob 7 is at the first angle, the short axis of the first cam 71 abuts the top plate 5 to limit the lock plate 3 from moving to the position of replacing the password, and the long axis of the second cam 72 abuts the sliding block 6 to limit the rotation angle of the limit toggle block 4 so that the sliding rod 8 cannot move to the position of retrieving the password; when the function knob 7 is at the second angle, the short axis of the first cam 71 abuts the top plate 5 to limit the lock plate 3 from moving to the position of replacing the password, and the short axis of the second cam 72 abuts the sliding block 6 to unlock the rotation angle of the limit toggle block 4 so that the sliding rod 8 moves to the position of retrieving the password; when the function knob 7 is at the third angle, the long axis of the first cam 71 abuts the top plate 5 to push the lock plate 3 to move to the position of replacing the password, and the long axis of the second cam 72 abuts the sliding block 6 to limit the rotation angle of the limit toggle block 4 so that the sliding rod 8 cannot move to the position of retrieving the password, that is, the sliding rod 8 is reset, thereby cooperating with the linear movement of the lock plate 9 to perform the operation of replacing the password.

[0091] The circumferential surface of the top plate toggle block 3 is provided with a first cam wall 31 and a first notch 32; the top plate 5 is provided with a first convex portion 51 arranged opposite to the circumferential surface of the top plate toggle block 3, and the first convex portion 51 flexibly cooperates with the first cam wall 31 or the first notch 32 as the top plate toggle block 3 rotates to realize the linkage between the door handle 2 and the locking plate 9. When the cooperation position of the first convex portion 51 is changed between the first cam wall 31 and the first notch 32, the locking plate 9 moves in a straight line.

[0092] The circumferential surface of the above-mentioned limit switch block 4 is provided with a second cam wall 41 and a second notch 42 for the end of the sliding rod 8 to cooperate with. The end of the sliding rod 8 flexibly cooperates with the second cam wall 41 or the second notch 42 as the limit switch block 4 rotates to realize the linkage between the door handle 2 and the sliding rod 8. However, when the cooperation position of the end of the sliding rod 8 changes between the second cam wall 41 and the second notch 42, the sliding rod 8 moves in a straight line.

[0093] The circumferential surface of the above-mentioned limit toggle block 4 is recessed to form an arc-shaped groove 43 for the sliding block 6 to flexibly cooperate with. Both ends of the arc-shaped groove 43 are provided with retaining walls 44. The sliding block 6 is provided with a second protrusion 61 arranged opposite to the circumferential surface of the limit toggle block 4. The second protrusion 61 moves between the retaining walls 44 at both ends of the arc-shaped groove 43 as the limit toggle block 4 rotates. When the second protrusion 61 abuts against the retaining wall 44, the limit toggle block 4 can no longer rotate, that is, the door handle 2 can no longer rotate.

[0094] The side of the top sheet 5 is provided with a wing 52 which is arranged opposite to the end of the locking sheet 9. When the top sheet 5 moves driven by the top sheet shifting block 3, the wing 52 can push the locking sheet 9 to move linearly.

[0095] The two ends of the sliding block 6 are provided with mounting grooves 62 on one side facing the limit toggle block 4, and a slider spring 10 is provided in the mounting groove 62. The slider spring 10 is used to provide elastic force to make the sliding block 6 move away from the limit toggle block 4, so that the restriction on the rotation angle of the limit toggle block 4 can be released under the action of the elastic force (that is, it can be separated from the above-mentioned arc groove 43).

[0096] The positions of the first cam 71 and the second cam 72 on the axis of the function knob 7 are not limited and are determined according to the relative positions of the sliding rod 8 and the locking plate 9 of the door lock. Therefore, the shapes of the top plate 5 and the sliding block 6 can be adjusted accordingly.

[0097] The operating portion 73 passes through the mounting surface of the housing 1, that is, the operating portion 73 is located on the back of the door lock and can only be operated on the inner side of the locked object (such as a door panel) to switch the state of the door lock (normal, code search, code change), which greatly improves the safety level of the door lock.

[0098] The above-mentioned operating mechanism also includes an emergency component 20 for realizing emergency unlocking, and the emergency component 20 includes an emergency lock cylinder 201, a rotating disk 202, a sliding pin 203, a third cam 204 and an emergency spring 205; the door handle 2 is provided with a mounting hole 21 for assembling the emergency lock cylinder 201, and the port of the mounting hole 21 can be installed with a dust cover 30 for shielding and dustproofing; the top plate toggle block 3 is provided with a rotating groove 33 for rotating cooperation with the rotating disk 202, and the periphery of the rotating groove 33 is provided with a third notch 34; the rotating disk 202 is coaxially connected with the limit toggle block 4, and is provided with a sliding groove 2021 for sliding cooperation with the sliding pin 203, and the sliding groove 301 ... the sliding groove 3011 is provided with a third notch 34; the rotating disk 202 is coaxially connected with the limit toggle block 4, and the sliding groove 3011 is provided with a third notch 34; the rotating disk 202 is coaxially connected with the limit toggle block 4, and the sliding groove 3011 is provided with a third notch 34; the rotating disk 202 is The side wall of the connection groove 2021 is provided with a fourth notch 2022; the sliding pin 203 is provided with a third protrusion 2031 that is movably arranged in the fourth notch 2022 and the third notch 34; the third cam 204 is rotatably fitted in the sliding groove 2021 and abuts against the opposite side of the third protrusion 2031 of the sliding pin 203, and the movable end of the emergency lock cylinder 201 is arranged in the limit toggle block 4 and is coaxially connected with the third cam 204; the emergency spring 205 is arranged between the sliding pin 203 and the fourth notch 2022 of the sliding groove 2021, and is used to provide elastic force to move the sliding pin 203 in the direction away from the fourth notch 2022. Fig.11 and Fig.12 As shown, under normal conditions, the major axis of the third cam 204 abuts against the end of the sliding pin 203, so that the third convex portion 2031 protrudes from the rotating disk 202 and extends into the third notch 34. When the rotating disk 202 rotates, it can drive the top plate toggle block 3 to be synchronously caught; in the emergency unlocking state, the key is inserted to rotate the emergency lock cylinder 201, and the emergency lock cylinder 201 drives the third cam 204 to rotate a certain angle, so that the minor axis of the third cam 204 abuts against the end of the sliding pin 203. The sliding pin 203 is completely retracted into the rotating disk 202 under the action of the emergency spring 205. At this time, the top plate toggle block 3 is released from the linkage with the rotating disk 202, that is, the door handle 2 is no longer linked with the top plate toggle block 3, so the door handle 2 can be directly rotated without entering a password to drive the rotating disk 202 to rotate and realize unlocking.

[0099] Furthermore, the rotating disk 202 is provided with a connecting portion 2023 that rotatably penetrates the top plate toggle block 3, and the connecting portion 2023 is connected to the square rod 40 of the door lock to drive the lock tongue of the door lock to rotate synchronously to realize opening and closing the lock.

[0100] At the same time, emergency springs 205 are provided at both ends of the sliding pin 203 to ensure the stability of the moving direction of the sliding pin 203, thereby improving its functional stability.

[0101] Secondly, the above-mentioned emergency component 20 also includes a fixing frame 206 and a fixing plate 207 arranged in the mounting hole 21 for installing the emergency lock cylinder 201; the fixing frame 206 is locked in the mounting hole 21; the emergency lock cylinder 201 is installed in the fixing frame 206, and the fixing plate 207 is closed at the open end of the fixing frame 206 to prevent the emergency lock cylinder 201 from escaping from the fixing frame 206.

[0102] The operating mechanism further comprises an elastic member for driving the door handle 2 to return to its original position, which is preferably a torsion spring 50 installed in the housing 1 .

[0103] The working principle of the above operating mechanism is:

[0104] ①Normal initial state:

[0105] Main references Figures 13 to 17 Shown is the normal initial state of the present invention.

[0106] In the normal initial state, the function knob 7 is at the first angle; after the password is set, if the correct password is not pressed, the lock plate 9 is blocked by the button rod 602 and cannot move smoothly; at this time, when the door handle 2 is pressed (turned), the operating mechanism cannot be linked because it is supported by the lock plate 9, and thus the door cannot be unlocked normally.

[0107] ②Unlocking completion status:

[0108] Main references Figures 18 to 22 Shown is the unlocking completion state of the present invention.

[0109] When the correct password is pressed (entered), the locking plate 9 can be driven by the top plate 5 to move smoothly; at this time, the door handle 2 is pressed (turned), driving the limit toggle block 4 and the top plate toggle block 3 to rotate; the second cam wall 41 on the limit toggle block 4 moves linearly against the sliding rod 8, and the first cam wall 31 on the top plate toggle block 3 moves against the top plate 5, and the top plate 5 pushes the locking plate 9, so that the door handle 2 can be unlocked smoothly by turning; at this time, the long axis of the second cam 72 on the function knob 7 abuts against the sliding block 6 and makes the sliding block 6 stuck in the arc groove 43 of the limit toggle block 4, and the door handle 2 cannot continue to rotate after rotating to a certain angle, so that the corresponding sliding rod 8 will not move to the code-seeking position; after the door handle 2 is released, under the action of the torsion spring 50, the operating mechanism is reset to the initial position.

[0110] ③ Retrieve password status:

[0111] Main references Figure 23 to Figure 27 As shown, it is the password recovery state of the present invention.

[0112] When the function knob 7 is turned to the second angle (i.e., the password-retrieving state), the short axis of the second cam 72 on the function knob 7 abuts against the sliding block 6. The sliding block 6 disengages from the arc groove 43 under the action of the slider spring 10, so that the sliding block 6 cannot get stuck on the limit toggle block 4. When the door handle 2 is turned to the extreme position, each button cap 604 is pressed at this time, and whether the button rod 602 is stuck by the buckle 81 on the sliding rod 8 is determined to determine whether it is the set password.

[0113] ④Replace password status:

[0114] Main references Figure 28 to Figure 32 As shown, it is the replacement code state of the present invention.

[0115] After retrieving the password, the function knob 7 is rotated to the third angle (i.e., the password replacement state), and the second cam 72 on the function knob 7 maintains the sliding rod 8 in the top state, and the sliding block 6 cannot get stuck on the limit toggle block 4; at this time, under the action of the first cam 71 on the function knob 7 and the sliding rod spring 70, the sliding rod 8 and the top plate 5 move to the password replacement position; the locking plate 9 also retreats to the password replacement position under the action of the locking plate spring 80; at this time, the button cap 604 is pressed, and the button rod 602 will not be blocked by the locking plate 9; the button rod 602 can be pressed to the bottom of the corresponding button groove 121 of the lock body 12, and under the joint action of the inclined surface of the button cap 604 and the inclined surface at the bottom of the lock body button groove 121, the button rod 602 will be rotated 90°, thereby switching the button rod 602 to the state of setting the password or not, and completing the new password setting; after setting the password, turn the door handle 2 to the initial position, and then turn the function knob 7 to the first angle to achieve the normal unlocking function.

[0116] In addition, reference Figure 1 and Figure 2 As shown, the present invention also discloses a mechanical door lock, including a shell 1 for assembling the above-mentioned operating mechanism, a sliding rod 8 and a locking plate 9 cooperating with the operating mechanism, and a key assembly 60 cooperating with the sliding rod 8 and the locking plate 9; the above-mentioned locking plates 9 and several groups of key assemblies 60 are arranged on both sides of the sliding rod 8.

[0117] The specific implementation of the above-mentioned mechanical door lock is shown below.

[0118] The housing 1 comprises a lock shell 11 and a lock body 12, and a plurality of key slots 121 are arranged on the lock body 12; the key assembly 60 comprises a return spring 601, a key rod 602, a key spring 603 and a key cap 604 which are sequentially fitted in the key slot 121; a pressing and rotating structure (similar to a pressing switch of a ballpoint pen) is arranged between the key cap 604 and the key rod 602, and between the key rod 602 and the key slot 121, so that the key rod 602 can be rotated when the key cap 604 is pressed to the code-changing height, thereby realizing the replacement of the password.

[0119] Furthermore, the housing 1 further comprises a bottom plate 13 mounted on the lock body 12 for limiting the top plate toggle block 3 , a pressure plate 14 for limiting the sliding rod 8 , and a pressure block 15 for limiting the locking plate 9 .

[0120] The above-mentioned sliding rod 8 relies on the sliding rod spring 70 arranged in the shell body 1 to reset toward the direction of the limit toggle block 4, and the locking plate 9 relies on the locking plate spring 80 arranged in the shell body 1 to reset toward the direction of the top plate 5. When the door handle 2 is rotated, the elastic force of the sliding rod spring 70 and the locking plate spring 80 is overcome to drive the sliding rod 8 and the locking plate 9 to move in a straight line, thereby completing the functions of unlocking, retrieving passwords, replacing passwords, etc. The specific structure of the sliding rod 8, the locking plate 9 and the button assembly 60 to achieve the above-mentioned functions is a disclosed and very mature prior art in this technical field, and is not the focus of improvement of the present invention, so it will not be elaborated here.

[0121] Through the above scheme, the present invention realizes the linkage between the door handle 3 and the sliding rod 8 and the lock plate 9 of the door lock by setting the top plate toggle block 3, the limit toggle block 4 and the top plate 5, and sets a rotatable function knob 7 in the shell 1, and limits the travel of the lock plate 9 and controls the rotation restriction of the limit toggle block 4 by the sliding block 6 through the first cam 71 and the second cam 72 of the function knob 7 respectively, so that the user can switch and maintain the normal opening and closing lock, password retrieval, password replacement and other states of the door lock only by turning the function knob 7, which can be achieved with one hand operation, making the operation easier and providing a better user experience.

[0122] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. An operating mechanism for a mechanical door lock, characterized in that: it includes a door handle rotatably fitted with the housing of the door lock, and a top piece toggle block, a limit toggle block, a top piece, a sliding block and a function knob arranged in the housing; the top piece toggle block and the limit toggle block are coaxially connected to the door handle; the circumferential surface of the limit toggle block is arranged opposite to the sliding rod of the door lock; the top piece is arranged on the circumferential surface of the top piece toggle block and is arranged opposite to the lock piece of the door lock; when the door handle rotates, the sliding rod and the lock piece are driven to move linearly; the sliding block is arranged on the circumferential surface of the limit toggle block and is used to limit the rotation angle of the limit toggle block; the function knob rotatably penetrates through the housing, and one end of it is provided with a first cam movably cooperating with the top piece and a second cam movably cooperating with the sliding block. When the first cam rotates, it adjusts the stroke of the top piece. When the second cam rotates, it drives the sliding block to limit or unlock the rotation angle of the limit toggle block; the other end of the function knob is provided with an operating part for the user to operate; the rotation process of the function knob is provided with a first angle, a second angle and a third angle; when the function knob is at the first angle, the short axis of the first cam abuts against the top piece to limit the lock piece from moving to the position of replacing the password, and the long axis of the second cam abuts against the sliding block to limit the rotation angle of the limit toggle block so that the sliding rod cannot move to the position of retrieving the password; when the function knob is at the second angle, the short axis of the first cam abuts against the top piece to limit the lock piece from moving to the position of replacing the password, and the short axis of the second cam abuts against the sliding block to unlock the rotation angle of the limit toggle block so that the sliding rod moves to the position of retrieving the password; when the function knob is at the third angle, the long axis of the first cam abuts against the top piece to push the lock piece to move to the position of replacing the password, and the long axis of the second cam abuts against the sliding block to limit the rotation angle of the limit toggle block so that the sliding rod cannot move to the position of retrieving the password.

2. The operating mechanism for a mechanical door lock according to claim 1, characterized in that: the circumferential surface of the top piece toggle block is provided with a first cam wall and a first notch; the top piece is provided with a first convex part arranged opposite to the circumferential surface of the top piece toggle block, and the first convex part movably cooperates with the first cam wall or the first notch as the top piece toggle block rotates.

3. The operating mechanism for a mechanical door lock according to claim 1, characterized in that: the circumferential surface of the limit toggle block is provided with a second cam wall and a second notch for the end part of the sliding rod to cooperate with, and the end part of the sliding rod movably cooperates with the second cam wall or the second notch as the limit toggle block rotates.

4. The operating mechanism for a mechanical door lock according to claim 1, characterized in that: The circumferential surface of the limit toggle block is recessed to form an arc-shaped groove for the sliding block to flexibly cooperate with, and retaining walls are arranged at both ends of the arc-shaped groove. The sliding block is provided with a second convex portion arranged opposite to the circumferential surface of the limit toggle block, and the second convex portion moves between the retaining walls at both ends of the arc-shaped groove as the limit toggle block rotates.

5. An operating mechanism for a mechanical door lock as claimed in claim 1, Features: The side edge of the top sheet is provided with a wing sheet which is arranged opposite to the end of the locking sheet and is used to push the locking sheet.

6. An operating mechanism for a mechanical door lock as claimed in claim 1, Features: Both ends of the sliding block are provided with mounting grooves on one side facing the limit-shifting block, and slider springs are provided in the mounting grooves. The slider springs are used to provide elastic force to keep the sliding block away from the limit-shifting block.

7. An operating mechanism for a mechanical door lock as claimed in claim 1, Features: The operating portion passes through the mounting surface of the shell; the operating mechanism also includes a torsion spring for driving the door handle to reset.

8. An operating mechanism for a mechanical door lock as claimed in claim 1, Features: The operating mechanism also includes an emergency component, which includes an emergency lock core, a rotating disk, a sliding pin, a third cam and an emergency spring; the door handle is provided with a mounting hole for assembling the emergency lock core; the top plate toggle block is provided with a rotating groove for rotatably engaging with the rotating disk, and a third notch is provided at the periphery of the rotating groove; the rotating disk is coaxially connected to the limit toggle block, and is provided with a sliding groove for slidably engaging with the sliding pin, and a fourth notch is provided on the side wall of the sliding groove; the sliding pin is provided with a third convex portion movably inserted into the fourth notch and the third notch; the third cam is rotatably engaged in the sliding groove and abuts against the opposite side of the third convex portion of the sliding pin, and the movable end of the emergency lock core is inserted into the limit toggle block and is coaxially connected to the third cam; the emergency spring is provided in the fourth notch between the sliding pin and the sliding groove.

9. A mechanical door lock, Features It comprises a shell for assembling the operating mechanism as described in any one of claims 1 to 8, a sliding rod and a locking plate matched with the operating mechanism, and a key assembly matched with the sliding rod and the locking plate; the locking plate and several groups of key assemblies are arranged on both sides of the sliding rod.

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