Mounting structure of mechanical coded lock and mechanical coded lock

Abstract

The utility model relates to the technical field of locks, and discloses a mounting structure of a mechanical coded lock and the mechanical coded lock, the mounting structure of the mechanical coded lock comprises a lock shell, the back side of the lock shell is provided with a threaded sleeve detachably connected with the lock shell, at least part of the threaded sleeve protrudes out of the back side of the lock shell, and the periphery of the threaded sleeve is provided with external threads; the fixing nut is movably arranged on the thread bushing and is in threaded connection with the external thread on the thread bushing; when the mechanical coded lock is installed on a door body, the threaded sleeve is arranged in the door body in a penetrating mode, and the fixing nut can be rotated to enable the fixing nut to move along the external threads on the threaded sleeve so as to fix the mechanical coded lock on the door body. The mechanical coded lock has the advantages of being convenient to install, good in universality and convenient to update and upgrade.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, and in particular to an installation structure and a mechanical combination lock. Background Technology

[0002] Mechanical combination locks can be unlocked using the correct mechanical combination. Compared to traditional key locks, mechanical combination locks allow for keyless operation. Compared to electronic locks, mechanical combination locks are electricity-free. Therefore, they offer advantages such as ease of use and high stability.

[0003] Existing mechanical combination locks are generally installed by fixing the lock case to cabinet or box doors. However, in actual installation, existing mechanical combination locks are inconvenient to install and have poor versatility. Furthermore, when it is necessary to upgrade a traditional mechanical lock to a mechanical combination lock, the installation is also very troublesome. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is to propose an installation structure and mechanical combination lock that is easy to install, has good versatility, and is easy to update and upgrade.

[0005] The technical solution adopted by this utility model to solve its technical problem is to propose an installation structure for a mechanical combination lock, comprising:

[0006] A lock housing, wherein a threaded sleeve is disposed on the back side of the lock housing and is detachably connected thereto, the threaded sleeve at least partially protruding from the back side of the lock housing, and the outer periphery of the threaded sleeve having external threads;

[0007] A fixed nut is movably mounted on the threaded sleeve and threadedly connected to the external thread on the threaded sleeve.

[0008] When the mechanical combination lock is installed on the door, the threaded sleeve passes through the door and can be fixed on the door by rotating the fixing nut, which moves along the external thread on the threaded sleeve.

[0009] Furthermore, the external thread on the threaded sleeve and the internal thread of the fixing nut are M19 or M18.

[0010] Furthermore, the mechanical combination lock is equipped with a lock cylinder module, which is inserted into the threaded sleeve;

[0011] When the threaded sleeve is removed from the lock housing, the lock cylinder module is at least partially exposed on the back side of the lock housing.

[0012] Furthermore, a mounting platform is provided at one end of the threaded sleeve near the lock housing, and the mounting platform is detachably and fixedly connected to the lock housing.

[0013] Furthermore, the mounting platform is provided with multiple through holes, and the lock housing is provided with multiple first threaded holes corresponding one-to-one with the through holes;

[0014] A screw or bolt passes through the through hole and is threaded into the first threaded hole, thereby detachably fixing the mounting bracket to the lock housing.

[0015] Furthermore, the back of the lock case is provided with a back plate, and the back plate is provided with a mounting groove. The mounting bracket is disposed in the mounting groove and is flush with the back plate.

[0016] Furthermore, the outer periphery of the threaded sleeve is symmetrically provided with two protrusions, which divide the external thread on the threaded sleeve into two parts, and the two parts of the external thread near the two protrusions respectively form a notch;

[0017] When the threaded sleeve is inserted into the door body, it can be positioned and prevented from rotating by the two protruding strips.

[0018] Furthermore, a stud is disposed on the back side of the lock housing, and the stud is provided with a second threaded hole;

[0019] When the mechanical combination lock is installed on the door, screws or bolts can be threaded through the door body and connected to the second threaded hole to fix the lock housing to the door body.

[0020] The technical solution adopted by this utility model to solve its technical problem is to also propose a mechanical combination lock, characterized in that it includes:

[0021] The above-mentioned installation structure;

[0022] A lock cylinder module, movably mounted on the lock housing, includes a lock cylinder;

[0023] A locking mechanism is provided in the lock housing and includes multiple combination wheels, which are movably disposed in the lock housing. The locking mechanism can lock the lock cylinder module, and when the multiple combination wheels are rotated to the correct combination, the locking mechanism releases the lock cylinder module.

[0024] A knob is rotatably mounted on the lock housing and connected to the lock cylinder module; when the locking mechanism releases the lock cylinder module, rotating the knob can drive the lock cylinder module to rotate.

[0025] The knob is provided with a cover that is detachably and fixedly connected to it, and the cover covers the lock cylinder; when the cover is removed from the knob, the keyhole of the lock cylinder can be exposed, and a mechanical emergency key that matches the lock cylinder can be inserted into the keyhole to rotate the lock cylinder module.

[0026] Furthermore, the cover is provided with positioning protrusions and elastic buckles;

[0027] When the cover is fixed on the knob, the positioning protrusion positions the cover on the knob, and the elastic buckle is engaged with the knob; when the elastic buckle is driven to deform elastically, the elastic buckle can be disengaged from the knob, so that the cover can be removed from the knob.

[0028] Compared with the prior art, the present invention has at least the following beneficial effects:

[0029] 1. In this utility model, a threaded sleeve is detachably and fixedly connected to the back side of the lock housing. A fixing nut is movably disposed on the threaded sleeve. When the mechanical combination lock needs to be installed on a door, the threaded sleeve can be inserted into the door body, and the lock housing can be fixed to the door body by rotating the fixing nut, thereby fixing the mechanical combination lock to the door body. The mechanical combination lock is easy to install. Furthermore, when some traditional mechanical locks need to be upgraded to mechanical combination locks, the lock cylinder can be directly removed, the threaded sleeve of this mechanical combination lock can be removed, and it can be directly installed and used, realizing keyless and powerless operation, and convenient upgrades and updates.

[0030] 2. In this utility model, the external thread on the threaded sleeve and the internal thread of the fixing nut are set to M19 or M18 to unify the mounting holes on the door body, which are consistent with the mounting holes of some mechanical locks and electronic locks on the market. This makes it convenient to replace existing locks on the market and facilitates the mass production of doors (such as cabinet doors or box doors).

[0031] 3. In this utility model, when the threaded sleeve is removed from the lock housing, the lock cylinder is exposed, and it remains a complete product. Furthermore, the threaded sleeve is detachably fixed to the lock housing via a mounting plate. During installation, it is positioned and prevented from rotating by two protruding strips. When machining the external thread, a notch is provided to ensure that the external thread is easy to clean at the root. Installation, disassembly, fixing, and machining are all convenient.

[0032] 4. In this utility model, a cover is provided on the knob of the mechanical combination lock. The cover conceals the lock cylinder inside, hiding the emergency keyhole and improving its aesthetics. When an emergency unlocking is needed using a mechanical key, the elastic buckle on the cover disengages from the knob, and the cover is removed from the knob to expose the keyhole on the lock cylinder. Inserting the matching mechanical emergency key into the keyhole will then unlock the lock. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the mechanical combination lock mounting structure of this utility model (retaining the combination wheel and knob);

[0034] Figure 2 for Figure 1 A structural diagram from another perspective;

[0035] Figure 3 This is a schematic diagram of the threaded sleeve structure;

[0036] Figure 4 for Figure 3 A structural diagram from another perspective;

[0037] Figure 5 A schematic diagram of the first embodiment of a mechanical combination lock;

[0038] Figure 6 for Figure 5 A schematic diagram of the structure of a mechanical combination lock after the threaded sleeve has been removed;

[0039] Figure 7 for Figure 5 A schematic diagram of the mechanical combination lock when the cover on the knob is removed and it is unlocked with the mechanical emergency key.

[0040] Figure 8 A half-section diagram showing the positioning protrusion and elastic buckle after the knob and cover are assembled;

[0041] Figure 9 This is a schematic diagram of the cover structure;

[0042] Figure 10 for Figure 5 A schematic diagram of the locking mechanism in a mechanical combination lock;

[0043] Figure 11 A schematic diagram of the second embodiment of a mechanical combination lock;

[0044] Figure 12 for Figure 11 A schematic diagram of the locking mechanism in a mechanical combination lock;

[0045] Figure 13 for Figure 12 A structural diagram from another perspective;

[0046] Figure 14 A schematic diagram of the third embodiment of a mechanical combination lock;

[0047] Figure 15 for Figure 14 A schematic diagram of the locking mechanism in a mechanical combination lock;

[0048] Figure 16 A schematic diagram of the fourth embodiment of a mechanical combination lock;

[0049] Figure 17 for Figure 16 A schematic diagram of the locking mechanism in a mechanical combination lock.

[0050] In the picture:

[0051] 1. Lock case; 10. Back plate; 101. Mounting slot; 102. First threaded hole; 11. Stud; 110. Second threaded hole;

[0052] 2. Threaded sleeve; 20. External thread; 21. Mounting platform; 210. Through hole; 22. Raised bar; 23. Notch;

[0053] 3. Secure the nuts;

[0054] 4. Lock cylinder module; 40. Lock tongue;

[0055] 5. Locking mechanism; 50. Combination wheel; 51. Locking element;

[0056] 6. Knob; 60. Cover; 601. Positioning protrusion; 602. Elastic buckle; 61. Small hole;

[0057] 7. Mechanical emergency key. Detailed Implementation

[0058] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0059] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0060] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0061] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0062] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0063] Mechanical combination locks are commonly found on cabinet doors and box doors, and are generally unlocked using a mechanical combination. Compared to traditional key locks, they eliminate the hassle of not being able to open the lock if you forget your key. Compared to electronic locks, they are electricity-free, offer better stability, and have a longer lifespan. Preferably, to ensure the lock can still be opened if the user forgets the correct combination, an emergency unlocking mechanism is usually included. For example, some mechanical combination locks are equipped with a mechanical emergency key (7), which can be used to unlock the lock after forgetting the correct combination. Some mechanical combination locks also have a combination retrieval function.

[0064] Existing mechanical combination locks are inconvenient to install and lack versatility. The need to create mounting holes of varying sizes on doors (such as cabinet or box doors) makes mass production of these doors difficult. Furthermore, upgrading existing mechanical locks to mechanical combination locks is also cumbersome.

[0065] Therefore, the installation structure of the mechanical combination lock provided in this application and the mechanical combination lock itself, such as Figures 1-2 As shown, the installation structure of the mechanical combination lock mainly includes: a lock housing 1, a threaded sleeve 2, and a fixing nut 3. A threaded sleeve 2, detachably connected to the back of the lock housing 1, is disposed thereon. The threaded sleeve 2 protrudes at least partially from the back of the lock housing 1, and its outer circumference has external threads 20. The fixing nut 3 is movably mounted on the threaded sleeve 2 and threadedly connected to the external threads 20 on the threaded sleeve 2. When the mechanical combination lock is installed on a door, the threaded sleeve 2 passes through the door, and the fixing nut 3 can be rotated to move along the external threads 20 on the threaded sleeve 2, thereby fixing the mechanical combination lock to the door.

[0066] In practical use, the back of the lock housing 1 of this application is equipped with a threaded sleeve 2 that is detachably and fixedly connected to it. A fixing nut 3 is movably mounted on the threaded sleeve 2. When the mechanical combination lock needs to be installed on a door, the threaded sleeve 2 can be inserted into the door, and the lock housing 1 can be fixed to the door by rotating the fixing nut 3. The fixing nut 3 and the lock housing 1 clamp the door, thereby fixing the mechanical combination lock to the door. A one-way ratchet (not shown in the figure) is provided on the end face of the fixing nut 3 near the lock housing 1 to prevent the fixing nut 3 from loosening. When the fixing nut 3 is tightened, the one-way ratchet bites into the door, ensuring that the fixing nut 3 will not rotate in the loosening direction, ensuring the fixing effect of the mechanical combination lock. The mechanical combination lock is easy to install. Furthermore, when it is necessary to upgrade some traditional mechanical locks to mechanical combination locks, the lock cylinder of the traditional mechanical lock can be directly removed, and the threaded sleeve 2 of the mechanical combination lock in this application can be removed and directly installed for use, achieving keyless and powerless operation, and convenient upgrades and updates. That is, combining... Figure 5 and Figure 6 As shown, the mechanical combination lock of this application includes a lock cylinder module 4, which is inserted into a threaded sleeve 2. A latch 40 is detachably connected to the end of the lock cylinder module 4 away from the lock housing 1. The mechanical combination lock is locked to the door by the latch 40, and the latch 40 can also be rotated to unlock the door. When the threaded sleeve 2 is removed from the lock housing 1, the lock cylinder module 4 is at least partially exposed on the back side of the lock housing 1. That is, in this application, when the threaded sleeve 2 is removed from the lock housing 1, the lock cylinder is partially exposed, and it is still a complete product, which facilitates the upgrading of traditional mechanical locks or electronic locks.

[0067] In this application, the external thread 20 on the threaded sleeve 2 and the internal thread of the fixing nut 3 are both M19 or M18. That is, both the external thread 20 and the internal thread are M19 or M18, ensuring that the external thread 20 on the fixing nut 3 is compatible with the external thread 20 on the threaded sleeve 2. Setting both threads to M19 or M18 facilitates the standardization of mounting holes on doors (such as cabinet doors or box doors), making them consistent with the mounting holes of some mechanical locks and electronic locks on the market. This facilitates the replacement of existing locks on the market and allows for mass production of doors (such as cabinet doors or box doors).

[0068] Specifically, in combination Figures 2-4As shown, the threaded sleeve 2 of this application is equipped with a mounting platform 21 near the end of the lock housing 1. The mounting platform 21 is detachably and fixedly connected to the lock housing 1. Specifically, the mounting platform 21 in this embodiment is preferably, but not limited to, a square mounting platform 21. A square mounting platform 21 is easy to process and easy to position during installation. The mounting platform 21 is provided with multiple through holes 210, specifically, one through hole 210 is provided at each of the four corners of the mounting platform 21. The lock housing 1 is provided with multiple first threaded holes 102 corresponding to the through holes 210, specifically, four first threaded holes 102 corresponding to the four through holes 210. Screws or bolts pass through the through holes 210 and are threaded into the first threaded holes 102 to detachably fix the mounting platform 21 to the lock housing 1. In this application, it is preferred to use flat-head screws to detachably fix the mounting platform 21 to the lock housing 1 to ensure that there is no outward protrusion after the screws are fixed.

[0069] More specifically, a back plate 10 is disposed on the back side of the lock housing 1. The lock housing 1 is mainly composed of a housing (not shown in the figure) and a back plate 10. The back plate 10 is detachably fixed to the back side of the housing by screws. The housing and the back plate 10 together form a mounting cavity. After the internal components of the mechanical combination lock are installed into the mounting cavity, the back plate 10 is fixed to the housing to shield the internal structure and prevent the movement of its internal components from being disturbed by external factors. A mounting groove 101 is provided on the back plate 10. The mounting groove 101 is preferably, but not limited to, a square groove, and its outer dimensions are slightly larger than the outer dimensions of the mounting bracket 21 to ensure that the mounting bracket 21 can be installed.

[0070] The mounting bracket 21 is positioned within the mounting groove 101 and is flush with the back plate 10. Specifically, the end face (rear face) of the mounting bracket 21 closest to the external thread 20 is flush with the back of the back plate 10. This design ensures that both the mounting bracket 21 and the back plate 10 are firmly attached to the door when the mechanical combination lock is installed, guaranteeing a secure fit and preventing loosening over time. Conversely, if the rear face of the mounting bracket 21 protrudes beyond the back of the back plate 10 after installation in the mounting groove 101, the back of the back plate 10 will not fit properly against the door when the mechanical combination lock is fixed to it, thus affecting the lock's secure fit. If the rear end face of the mounting plate 21 is recessed compared to the back face of the back plate 10 after the mounting plate 21 is installed into the mounting groove 101, then when the mechanical combination lock is fixed to the door, although the back plate 10 can fit well against the door, the mounting plate 21 cannot fit well against the door. During long-term use, the screws on the mounting plate 21 are prone to loosening.

[0071] The threaded sleeve 2 is symmetrically provided with two protruding strips 22 on its outer periphery. These two protruding strips 22 protrude from the left and right sides of the threaded sleeve 2, respectively. The two protruding strips 22 divide the external thread 20 on the threaded sleeve 2 into upper and lower parts, and each part of the external thread 20 near the two protruding strips 22 forms a notch 23. When the threaded sleeve 2 is inserted into the door body, it can be positioned and prevented from rotating by the two protruding strips 22. Specifically, the two protruding strips 22 are aligned with the corresponding two mounting slots 101 on the door body, allowing them to be directly inserted into the two mounting slots 101 for positioning. After the threaded sleeve 2 is installed, the circumferential limiting effect of the two protruding strips 22 prevents rotation of the threaded sleeve 2, thus achieving the anti-rotation effect. In actual use, the threaded sleeve 2 is detachably fixed to the lock housing 1 via the mounting base 21. During installation, the two protruding strips 22 provide positioning and anti-rotation. When machining the external thread 20, the notch 23 ensures easy cleaning of the external thread 20. Installation, disassembly, fixing, and machining are all convenient.

[0072] Optionally, to ensure reliable installation and fixation of the mechanical combination lock, a stud 11 is provided on the back side of the lock housing 1, and the stud 11 has a second threaded hole 110. When the mechanical combination lock is installed on the door, screws or bolts can pass through the door body and be threaded into the second threaded hole 110 to fix the lock housing 1 to the door body. The stud 11 is integrally formed on the housing, and a corresponding round hole is provided on the back plate 10. The thread passes through the round hole of the back plate 10. When the back plate 10 is installed on the housing, it can be positioned by the stud 11 and the round hole, which facilitates the quick installation and fixation of the back plate 10 on the housing.

[0073] In summary, the lock housing 1 of this application is equipped with a threaded sleeve 2 that is detachably and fixedly connected to it. When the mechanical combination lock needs to be installed on the door, the threaded sleeve 2 can be inserted into the door and the lock housing 1 can be fixed to the door by rotating the fixing nut 3, making the installation of the mechanical combination lock simple. When the threaded sleeve 2 is removed from the lock housing 1, the lock cylinder is exposed, and the mechanical combination lock remains a complete product, facilitating the upgrading of traditional mechanical locks or electronic locks. Setting the thread specifications of both the threaded sleeve 2 and the fixing nut 3 to M19 or M18 facilitates the standardization of the mounting holes on the door (such as cabinet doors or box doors), making them consistent with the mounting holes of some mechanical locks and electronic locks on the market. This facilitates the replacement of existing locks on the market, allowing for direct installation and upgrading to a mechanical combination lock, achieving keyless and electricity-free operation. Furthermore, it facilitates the mass production of door bodies (such as cabinet doors or box doors), allowing different locks to be installed on the same product when customers have different requirements.

[0074] like Figure 5 , Figure 7 and Figure 10 As shown, when the above-described mechanical combination lock mounting structure is applied to an actual mechanical combination lock, the mechanical combination lock mainly includes the following structure:

[0075] The aforementioned installation structure includes a lock housing 1, a threaded sleeve 2 that is detachably and fixedly connected to it, and a fixing nut 3 that is movably disposed on the threaded sleeve 2.

[0076] The lock cylinder module 4 is movably set in the lock shell 1 and includes a lock cylinder. In this application, the lock cylinder is a lock cylinder that can be unlocked by the mechanical emergency key 7. By setting the lock cylinder structure, it can be ensured that when the correct password is forgotten, the user can unlock the door in an emergency by using the mechanical emergency key 7. Furthermore, the mechanical emergency key 7 can be used for management or maintenance. This lock cylinder structure is existing technology and will not be described in detail here.

[0077] The locking mechanism 5, located on the lock housing 1, includes a locking element 51 and multiple combination wheels 50, which are movably mounted on the lock housing 1. The locking mechanism 5 can lock the lock cylinder module 4, and when the multiple combination wheels 50 are rotated to the correct combination, the locking mechanism 5 releases the lock on the lock cylinder module 4. It should be explained that the main function of the locking mechanism 5 is to restrict the rotation of the lock cylinder module 4. That is, when the combination wheel 50 does not produce the correct combination, the locking element 51 of the locking mechanism 5 is locked to the lock cylinder module 4, and the locking element 51 will not retract. The lock cylinder module 4 cannot release the locking element 51 unless an emergency unlocking is performed using the mechanical emergency key 7, in which case the lock cylinder module 4 can be rotated. When the combination wheel 50 produces the correct combination, rotating the lock cylinder module 4 allows the lock cylinder module 4 to rotate and causes the locking element 51 of the locking mechanism 5 to retract, meaning the locking element 51 is now released from its rotational restriction on the lock cylinder module 4. In this application, different arrangement methods of the password wheels 50 can be set according to the user's needs. Therefore, various existing locking mechanisms 5 can be used to achieve the desired result, which will be explained in detail later.

[0078] A knob 6 is rotatably mounted on the lock housing 1 and connected to the lock cylinder module 4. When the locking mechanism 5 releases the lock cylinder module 4, rotating the knob 6 drives the lock cylinder module 4 to rotate, which in turn drives its bolt 40 to rotate, thus unlocking the lock. In this application, the knob 6 is provided with a cover 60 that is detachably and fixedly connected to it, which covers the lock cylinder. When the cover 60 is removed from the knob 6, the keyhole of the lock cylinder can be exposed, and a mechanical emergency key 7 matching the lock cylinder can be inserted into the keyhole to rotate the lock cylinder module 4.

[0079] Specifically, such as Figures 8-9As shown, the cover 60 is provided with a positioning protrusion 601 and an elastic buckle 602. The positioning protrusion 601 is located on the opposite side of the elastic buckle 602, and protrudes outward from the circumference of the cover 60. When the cover 60 is fixed on the knob 6, the positioning protrusion 601 positions the cover 60 on the knob 6, and the elastic buckle 602 is engaged with the knob 6. When the elastic buckle 602 is elastically deformed, it can be disengaged from the knob 6, so that the cover 60 can be removed from the knob 6.

[0080] It should be explained that the elastic buckle 602 of this application has an oblong hole along its height direction. The oblong hole facilitates the elastic deformation of the elastic buckle 602, prevents material accumulation during bending, and ensures that the elastic buckle 602 will not break during repeated elastic deformation. Furthermore, a reinforcing protrusion (not shown in the figure) is provided at the base of the elastic buckle 602 near the left and right ends to prevent the top of the elastic buckle 602 from undergoing smooth elastic deformation, while preventing root cracking at the bottom of the elastic buckle 602. A small hole 61 is provided on the side wall of the knob 6, directly opposite the elastic buckle 602. The small hole 61 allows a wire or steel wire to be inserted. For example, the diameter of the small hole 61 can be set to 1.5 mm or even smaller. When the steel wire is inserted into the small hole 61, it can push against the elastic buckle 602, causing the elastic buckle 602 to deform elastically and disengage from the knob 6. The cover 60 can then be removed from the knob 6, exposing the keyhole on the lock cylinder.

[0081] In use, the mechanical combination lock of this application features a cover 60 on the knob 6. This cover conceals the internal lock cylinder, hiding the emergency keyhole and improving aesthetics. When an emergency unlocking is needed using the mechanical key, the elastic latch 602 on the cover 60 disengages from the knob 6, allowing the cover 60 to be removed. This exposes the keyhole on the lock cylinder, enabling the insertion of the matching mechanical emergency key 7 for emergency unlocking. In contrast, existing mechanical combination locks all have exposed emergency keyholes (7), contradicting the advertised "keyless" design.

[0082] Although the structure of the locking mechanism 5 in this application is prior art and has many implementations, only a portion of them are described.

[0083] like Figure 5 and Figure 10 As shown, this is the first implementation of the mechanical combination lock of this application. Its four combination wheels 50 are arranged side by side and protrude completely from the front of the lock housing 1. When all four combination wheels 50 contain the correct combination, the locking member 51 will release the rotation limit on the lock cylinder module 4, and the mechanical combination lock can be unlocked smoothly by rotating the knob 6.

[0084] like Figures 11-13 As shown, this is a second implementation of the mechanical combination lock of this application, in which the four combination wheels 50 are arranged in pairs, protruding from the front of the lock housing 1. The difference from the first implementation is that in this method, the four combination wheels 50 are rotated into the interior of the lock housing 1, rather than protruding from the front of the lock housing 1. Two of the four combination wheels 50 protrude from the left side of the lock housing 1, and the other two protrude from the right side of the lock housing 1, facilitating the rotation of the combination wheels 50.

[0085] like Figures 14-15 As shown, this is the third implementation of the mechanical combination lock of this application. Its four combination wheels 50 are arranged side-by-side from top to bottom, with some of the four combination wheels 50 housed within the lock housing 1 and others protruding from the front of the lock housing 1, resulting in a more compact structure. Referring to the schemes with publication numbers CN206693766U or CN105019731B, the locking mechanism 5 can be implemented through the internal locking mechanism 5 of the mechanical combination lock.

[0086] like Figures 16-17 As shown, this is the fourth implementation of the mechanical combination lock of this application, in which the four combination wheels 50 are arranged in pairs, and some of them protrude from the front of the lock case 1.

[0087] In summary, when the arrangement of the combination wheels 50 changes, the transmission direction changes, and the transmission can be achieved through a worm gear or bevel gear. Since the locking mechanism 5 of this application uses existing structures in commercially available locks and is not an innovation of this application, it will not be described in detail here.

[0088] In this application, the mechanical combination lock is easy to install, has good versatility, and is easy to update and upgrade.

Claims

1. An installation structure for a mechanical combination lock, characterized in that, include: A lock housing, wherein a threaded sleeve is disposed on the back side of the lock housing and is detachably connected thereto, the threaded sleeve at least partially protruding from the back side of the lock housing, and the outer periphery of the threaded sleeve having external threads; A fixed nut is movably mounted on the threaded sleeve and threadedly connected to the external thread on the threaded sleeve. When the mechanical combination lock is installed on the door, the threaded sleeve passes through the door and can be fixed on the door by rotating the fixing nut, which moves along the external thread on the threaded sleeve.

2. The mounting structure of the mechanical combination lock according to claim 1, characterized in that, The external thread on the threaded sleeve and the internal thread of the fixing nut are M19 or M18.

3. The installation structure of the mechanical combination lock according to claim 1, characterized in that, The mechanical combination lock is equipped with a lock cylinder module, which is inserted into the threaded sleeve. When the threaded sleeve is removed from the lock housing, the lock cylinder module is at least partially exposed on the back side of the lock housing.

4. The mounting structure of the mechanical combination lock according to any one of claims 1-3, characterized in that, The threaded sleeve is provided with a mounting platform at one end near the lock housing, and the mounting platform is detachably and fixedly connected to the lock housing.

5. The mounting structure of the mechanical combination lock according to claim 4, characterized in that, The mounting platform is provided with multiple through holes, and the lock housing is provided with multiple first threaded holes that correspond one-to-one with the through holes; A screw or bolt passes through the through hole and is threaded into the first threaded hole, thereby detachably fixing the mounting bracket to the lock housing.

6. The mounting structure of the mechanical combination lock according to claim 4, characterized in that, The lock case has a back plate on its back side, and the back plate has a mounting groove. The mounting bracket is disposed in the mounting groove and is flush with the back plate.

7. The mounting structure of the mechanical combination lock according to claim 1, characterized in that, The outer periphery of the threaded sleeve is symmetrically provided with two protrusions, which divide the external thread on the threaded sleeve into two parts, and the two parts of the external thread near the two protrusions respectively form a notch; When the threaded sleeve is inserted into the door body, it can be positioned and prevented from rotating by the two protruding strips.

8. The mounting structure of the mechanical combination lock according to claim 1, characterized in that, A stud is provided on the back side of the lock housing, and the stud has a second threaded hole; When the mechanical combination lock is installed on the door, screws or bolts can be threaded through the door body and connected to the second threaded hole to fix the lock housing to the door body.

9. A mechanical combination lock, characterized in that, include: The mounting structure as described in any one of claims 1-8; A lock cylinder module, movably mounted on the lock housing, includes a lock cylinder; A locking mechanism is provided in the lock housing and includes multiple combination wheels, which are movably disposed in the lock housing. The locking mechanism can lock the lock cylinder module, and when the multiple combination wheels are rotated to the correct combination, the locking mechanism releases the lock cylinder module. A knob is rotatably mounted on the lock housing and connected to the lock cylinder module; when the locking mechanism releases the lock cylinder module, rotating the knob can drive the lock cylinder module to rotate. The knob is provided with a cover that is detachably and fixedly connected to it, and the cover covers the lock cylinder; when the cover is removed from the knob, the keyhole of the lock cylinder can be exposed, and a mechanical emergency key that matches the lock cylinder can be inserted into the keyhole to rotate the lock cylinder module.

10. The mechanical combination lock according to claim 9, characterized in that, The cover is provided with positioning protrusions and elastic buckles; When the cover is fixed on the knob, the positioning protrusion positions the cover on the knob, and the elastic buckle engages with the knob; When the elastic buckle is forced to deform elastically, it can disengage from the knob, thereby removing the cover from the knob.

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