A spherical mechanical combination lock

Abstract

The present invention belongs to the technical field of door locks, and particularly refers to a spherical mechanical password lock. It includes: an inner handle, an outer handle, and a square core. One end of the square core passes through the inner fixed plate and is connected to the inner handle, and a clutch assembly is formed at the other end. The clutch assembly passes through the handle connector and extends into the inner part of the outer handle and is connected to the password wheel. The handle connector is provided with a groove that can form a linkage with the clutch assembly; an annular notch is formed on the end face of the handle connector, and a square core protrusion that can be abutted against the annular notch is formed on the outer periphery of the square core; a fixed protrusion is formed on the end face of the inner fixed plate, and a positioning groove that matches the fixed protrusion is formed on the end face of the inner handle. It does not require a key to open, and the product structure is a completely mechanized structure with low cost. In addition, when the door is not locked, the door lock can be opened without entering a password.

Description

Technical Field

[0001] The invention belongs to the technical field of door locks, in particular to a spherical mechanical password lock. Background Art

[0002] A spherical door lock is a door lock with spherical inner and outer handles (lock handles) and is used to be installed on wooden doors, steel doors, aluminum alloy doors and plastic doors.

[0003] Spherical door locks are mostly used for interior doors. When the inner handle of a traditional spherical door lock is locked, the outer handle needs to be opened with a key. Therefore, when the inner door is locked, you need to find the key to enter the house. If it is not used frequently, once the inner handle is locked, finding the key becomes a very troublesome task.

[0004] In order to improve the above situation and meet the corresponding market demand, a spherical password lock has emerged on the market. Its principle is similar to that of the smart password lock for the entrance door. The door lock can be opened by entering the password in the form of an electronic signal, and the door can be opened in an anti-locked state without the need to insert or remove the key.

[0005] However, since this type of ball lock equipped with an electronic password lock is relatively expensive, the frequency of use of indoor doors is relatively low, and it is relatively troublesome to require a password every time the door is opened.

[0006] Therefore, in view of the above situation, it is necessary to develop a spherical mechanical combination lock that can be opened without a key and without a password when the lock is not locked. Summary of the invention

[0007] In view of the above problems, the present invention provides a spherical mechanical password lock, which does not require a key to open, has a completely mechanized structure, has a low manufacturing cost, and can be opened without entering a password when the door is not locked.

[0008] The object of the present invention is achieved in that:

[0009] A spherical mechanical combination lock, comprising:

[0010] The inner handle comprises an inner grip and an inner fixing plate, wherein the inner grip is connected to the outer side of the inner fixing plate and can move axially or rotate axially relative to the inner fixing plate;

[0011] An outer handle, comprising an outer handle and a handle connecting member, wherein the outer handle is connected to the outer side of the handle connecting member, and one or more code wheels are arranged inside the outer handle, and an opening for turning and displaying the code wheels is arranged on the outer handle;

[0012] A square core, one end of which passes through the inner fixing plate and is connected to the inner handle, and the other end of which is formed with a clutch assembly, which passes through the handle connecting piece and extends into the inner part of the outer handle and is connected to the password wheel, and the handle connecting piece is provided with a groove inside which can form a linkage with the clutch assembly;

[0013] An annular notch is formed on the end surface of the handle connector, and a square core protrusion that can abut against the annular notch is formed on the outer periphery of the square core;

[0014] A fixing protrusion is formed on the end surface of the inner fixing plate, and a positioning groove matched with the fixing protrusion is formed on the end surface of the inner handle.

[0015] Furthermore, the clutch assembly includes a rotating shaft extending from the square core toward the outer handle side, a main cavity is formed in the rotating shaft, a linkage port is formed at the upper end of the main cavity, a gear pin that can be extended into the groove is provided in the main cavity, and a spring that makes the gear pin have a tendency to pop out of the linkage port, and an unlocking groove for the gear pin to pop out is provided on the password wheel.

[0016] Furthermore, the gear pin includes a main body located in the main cavity, the spring is arranged between the main body and the main cavity, the upper end of the main body extends to form a baffle that can extend out of the linkage port, the front end of the baffle is formed with a guide slope, and the outer end of the groove is provided with a pressure step.

[0017] Furthermore, a sub-cavity is formed on one side of the main cavity, and a guide flap is provided in the sub-cavity, one side of the guide flap is connected to the inner wall of the sub-cavity, and the other side is connected to the gear pin.

[0018] Furthermore, the rotating shaft is divided into a rotating section and a clutch section, the diameter of the clutch section is larger than the diameter of the rotating section, the square core protrusion is formed on the rotating section and abuts against the annular notch, and the clutch section is confined within the handle connector and the outer handle.

[0019] Furthermore, the code wheel includes a matching wheel sleeved on the clutch assembly, and a toggle wheel connected to the outer periphery of the matching wheel, and a code change resistance spring is provided between the matching wheel and the toggle wheel.

[0020] Furthermore, an unlocking resistance spring is provided between the matching wheel and the clutch assembly.

[0021] Furthermore, anti-slip grooves are formed on the surface of the shifting wheel.

[0022] Furthermore, the inner fixing plate includes an inner fixing plate body, and an inner handle cover extended from the inner fixing plate body, the inner handle includes an inner handle body, and an inner handle rotating shaft extended from the inner handle body, the inner handle rotating shaft is connected in the inner handle cover, and the positioning groove is formed on the inner handle rotating shaft, and the fixing protrusion is formed on the end face of the inner fixing plate body.

[0023] Furthermore, the square core is fixed on the inner handle shaft, and the inner handle shaft and the inner handle cover are both formed with top screw holes, and the top screw holes of the inner handle shaft are connected with fixed top screws to fix the square core.

[0024] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects:

[0025] 1. As a ball lock used for indoor doors, when the indoor door is locked, no key is required and the door can be opened by turning the code wheel to the correct position.

[0026] 2. The structure of the mechanical combination lock is a purely mechanical mechanism, and its manufacturing cost is lower than that of the electronic ball combination lock on the existing market.

[0027] 3. When the indoor door is not locked, it does not need to enter the password information every time to open the door like an electronic password lock, which just meets the use needs of the indoor door. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 The structure of a ball-shaped mechanical combination lock Figure 1 .

[0030] Figure 2 The structure of a ball-shaped mechanical combination lock Figure 2 .

[0031] Figure 3 This is an exploded view of the components of a ball-shaped mechanical combination lock.

[0032] Figure 4 The cross section of a ball-shaped mechanical combination lock in the reverse locked state Figure 1 .

[0033] Figure 5 It is a cross-sectional view of a spherical mechanical combination lock in a normally open state.

[0034] Figure 6 The cross section of a ball-shaped mechanical combination lock in the reverse locked state Figure 2 .

[0035] Figure 7 It is a schematic diagram of the structure of the inner handle and the inner fixing plate.

[0036] Figure 8 It is a schematic diagram of the structure of the connection between the handle connector and the square core.

[0037] Fig. 9 This is a schematic diagram of the structure of the cipher wheel.

[0038] Fig.10 It is a cross-sectional view of the clutch assembly and the cipher wheel when they are in cooperation.

[0039] 1-inner handle, 11-inner handle, 111-inner handle body, 112-inner handle shaft, 113-top screw hole, 114-positioning groove, 12-inner fixing plate, 121-inner fixing plate body, 122-inner handle cover, 123-top screw hole, 124-fixing protrusion, 2-outer handle, 21-outer handle, 211-open, 22-handle connector, 221-groove, 222-pressure step, 223-annular notch, 3-square core, 31-clutch assembly , 311-shaft, 311a-rotation section, 311b-clutch section, 312-main cavity, 313-auxiliary cavity, 314-linkage port, 315-gear pin, 3151-body, 3152-baffle, 3153-guide ramp, 316-guide flap, 317-spring, 32-square core protrusion, 33-unlocking resistance spring, 4-password wheel, 41-dial wheel, 42-number wheel, 421-unlocking slot, 43-code change resistance spring, 5-fixed top screw. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0041] like Figure 1 and 2 The spherical mechanical combination lock shown includes an inner handle 1, a square core 3 and an outer handle 2. The square core 3 is connected between the inner handle 1 and the outer handle 2. The square core 3 is also used to connect the lock body (not shown in the figure). The combination wheel 4 is arranged in the outer handle 2. When the door is locked by the inner handle 1, the combination wheel 4 on the outer handle 2 is required to open the door lock.

[0042] like Figure 3-8As shown, the inner handle 1 is composed of an inner fixing plate 12 and an inner handle 11, and the inner handle 11 can rotate relative to the inner fixing plate 12, or move axially relative to the inner fixing plate 12, and a fixing protrusion 124 is formed on the end surface of the inner fixing plate 12. Correspondingly, a positioning groove 114 is formed on the inner handle 11, and the side wall of the positioning groove 114 is arc-shaped. When the fixing protrusion 124 of the inner fixing plate 12 is located in the positioning groove 114 of the inner handle 11, if the inner handle 11 is rotated, the positioning groove 114 of the inner handle 11 will move along the fixing protrusion 124 on the inner fixing plate 12, so that the inner handle 11 is axially displaced relative to the inner fixing plate 12 while rotating.

[0043] The outer handle 2 is composed of an outer handle 21 and a handle connecting member 22. An annular notch 223 is provided on the end surface of the handle connecting member 22. Correspondingly, a square core protrusion 32 is formed on the square core 3. When the combination lock is not locked, the fixing protrusion 124 on the inner fixing plate 12 and the positioning groove 114 of the inner handle 11 are staggered with each other. Although the positions of the two are aligned, they are not directly in contact. In this case, the square core protrusion 32 on the square core 3 is against the annular notch 223 on the handle connecting member 22. At this time, the combination lock is in a normally open state. Figure 5 As shown in , in this case, the square core 3 can be directly driven to rotate by rotating the outer handle 2, thereby realizing the opening of the door.

[0044] When the inner handle 11 is pushed toward the inner fixing plate 12, the fixing protrusion 124 on the inner fixing plate 12 enters the positioning groove 114 of the inner handle 11. The movement of the inner handle 11 drives the square core 3 to also undergo axial displacement. At this time, the square core protrusion 32 on the square core 3 is offset from the annular notch 223 on the handle connector 22. Figure 4 As shown in , in this case, by rotating the outer handle 2, the outer handle 2 is in an idling state and cannot drive the square core 3 to rotate, so the door cannot be opened.

[0045] When the combination lock is in the reverse lock state, it is necessary to rotate the combination wheel 4 on the outer handle 2 to put it in the correct position. When the combination wheel 4 is in the correct position, the clutch assembly 31 on the square core 3 will be connected to the groove 221 on the handle connector 22, so that the outer handle 2 and the square core 3 are in a linkage state again. Then, when the correct password is entered, the square core 3 can be driven to rotate by rotating the outer handle 2, thereby opening the door. The clutch assembly 31 is equivalent to the clutch in the smart combination lock, and its main function is to make the outer handle 2 and the square core 3 form a linkage when the correct password is entered. In the present application, when the password of the combination wheel 4 is wrong, the clutch assembly 31 will not form a linkage with the groove 221 of the handle connector 22.

[0046] When the password of the password wheel 4 is correct, the clutch assembly 31 is linked with the groove 221 of the handle connector 22. When the square core 3 is driven to rotate by the outer handle 2, the inner handle 11 is also driven to rotate, so that the positioning groove 114 on the inner handle 11 and the fixing protrusion 124 of the inner fixing plate 12 are disengaged from each other, realizing the axial movement of the square core 3, and the square core protrusion 32 on the square core 3 is matched with the annular notch 223 on the handle connector 22 again, that is, when the password is successfully entered once and the outer handle 2 is rotated, the combination lock becomes normally open again, and the door can be opened without a password.

[0047] like Figure 3-5 As shown, the clutch assembly 31 includes a rotating shaft 311 formed by the square core 3 toward the side of the outer handle 2, the rotating shaft 311 is rotatably connected to the handle connecting member 2 and extends into the outer handle 21, the rotating shaft 311 forms a main cavity 312, a gear pin 315 and a spring 317 are arranged in the main cavity 312, the spring 317 is located below the gear pin 315, the main cavity 312 forms a linkage port 314 for the gear pin 315 to pop out, and a corresponding unlocking groove 421 is formed on the password wheel 4. When the correct password is turned to, the password wheel 4 presses the gear pin 315 to be located in the main cavity 312. When the password wheel 4 is turned to the correct password, the unlocking groove 421 on the password wheel 4 will be aligned with the linkage port 314 on the rotating shaft 311. At this time, the gear pin 315 will be popped up by the spring 317 and enter the unlocking groove 421 of the password wheel 4. At the same time, the gear pin 315 will enter the groove 221 of the handle connector 22, so that the square core 3 and the outer handle 2 are linked.

[0048] Furthermore, the gear pin 315 includes a main body 3151 located in the main cavity 312, and a baffle 3152 that can extend out of the linkage port 314, and a spring 317 acts between the main body 3151 and the main cavity 312. After the unlocking groove 421 of the code wheel and the baffle 3152 of the gear pin 315 are pressed against each other, in order to facilitate the rotation of the code wheel 4, each time the square core 3 is driven to rotate by rotating the outer handle 2, the square core 3 will move toward the side of the inner handle 1. During this movement, the guide slope 3153 formed at the front end of the baffle 3152 will be pressed inward by the pressing step 222 at the outer end of the groove 221, so that the gear pin 315 moves into the main cavity 312. At this time, the baffle 3152 on the gear pin 315 will be separated from the unlocking groove 421 of the code wheel 4, thereby making the rotation of the code wheel 4 smooth and the code wheel 4 can be disrupted again.

[0049] like Fig.10As shown, a sub-cavity 313 is provided on one side of the main cavity 312 of the rotating shaft 311, and the main cavity 312 and the sub-cavity 313 are interconnected. Since the gear pin 315 is bounced upward by the force of the spring 317, and the number of the code wheels 4 is at least two, when the unlocking groove 421 on one of the code wheels 4 is aligned with the linkage port 314, it is easy to cause the gear pin 315 to bounce up on one side, while the other side is in a compressed state. At this time, it is easy to know the password of one of the code wheels 4. To avoid this problem, a guide flap 316 is added to the sub-cavity 313, and one end of the guide flap 316 is rotatably connected to the side wall of the sub-cavity 313, and the other end is connected to the gear pin 315. In this way, the gear pin 315 will not bounce up on one side during the process of being bounced up, that is, the height of the upper end of the gear pin 315 is consistent during the process of being bounced up.

[0050] like Figure 4-6 As shown, the rotating shaft 311 consists of two parts, one part is a rotating section 311a matched with the circular hole at the annular notch 223, and the other part is a clutch section 311b located in the outer handle 2, wherein the diameter of the clutch section 311b is larger than the diameter of the rotating section 311a, and the clutch section 311b is confined in the outer handle 2 to prevent the clutch section 311b from being pulled out of the outer handle 2 when the inner handle 11 is rotated.

[0051] like Figure 3 and 9 As shown, the code wheel 4 includes a toggle wheel 41 and a matching wheel 42, wherein the matching wheel 42 is sleeved on the clutch assembly 31, and the toggle wheel 41 is sleeved on the outer circumference of the matching wheel 42, and a code change resistance spring 43 is provided between the dial wheel 41 and the matching wheel 42. The code change method of the combination lock is that when each group of code wheels 4 is toggled to the correct code position, the code wheel 4 cannot be further toggled due to the force from the clutch assembly 31. At this time, by applying a larger force, the matching wheel 42 is in a stationary state, and the toggle wheel 41 is in a rotating state, thereby realizing the code change of the code wheel 4, wherein the function of the code change resistance spring 43 is to prevent the toggle wheel 41 and the matching wheel 42 from rotating relative to each other under normal force conditions, resulting in a change of the code.

[0052] Furthermore, the unlocking resistance spring 33 provided between the number wheel 42 and the clutch assembly 31 increases the relative friction between the number wheel 42 and the clutch assembly 31 to prevent the code wheel 4 from rotating too easily.

[0053] Furthermore, in order to facilitate the rotation of the toggle wheel 41 , anti-slip grooves are provided on the surface of the toggle wheel 41 .

[0054] like Figure 6As shown, the inner fixing plate 12 includes an inner fixing plate body 121, and an inner handle cover 122 extended from the inner fixing plate body 121, the inner handle 11 includes an inner handle body 111, and an inner handle shaft 112 extended from the inner handle body 111, the inner handle shaft 112 is connected to the inner handle cover 122, and the positioning groove 114 is formed on the inner handle shaft 112, and the fixing protrusion 124 is formed on the end surface of the inner fixing plate body 121.

[0055] The square core 3 is fixed on the inner handle shaft 112 . The inner handle shaft 112 and the inner handle cover 122 are both formed with top screw holes 113 , 123 . The top screw hole 113 of the inner handle shaft 112 is connected with a fixed top screw 5 to fix the square core 3 .

[0056] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A ball-shaped mechanical combination lock, characterized in that: include: The inner handle comprises an inner grip and an inner fixing plate, wherein the inner grip is connected to the outer side of the inner fixing plate and can move axially or rotate axially relative to the inner fixing plate; An outer handle, comprising an outer handle and a handle connecting member, wherein the outer handle is connected to the outer side of the handle connecting member, and one or more code wheels are arranged inside the outer handle, and an opening for turning and displaying the code wheels is arranged on the outer handle; A square core, one end of which passes through the inner fixing plate and is connected to the inner handle, and the other end of which is formed with a clutch assembly, which passes through the handle connecting piece and extends into the inner part of the outer handle and is connected to the password wheel, and the handle connecting piece is provided with a groove inside which can form a linkage with the clutch assembly; An annular notch is formed on the end surface of the handle connector, and a square core protrusion that can abut against the annular notch is formed on the outer periphery of the square core; A fixing protrusion is formed on the end surface of the inner fixing plate, and a positioning groove matched with the fixing protrusion is formed on the end surface of the inner handle; The clutch assembly includes a rotating shaft extending from the square core toward one side of the outer handle, a main cavity is formed in the rotating shaft, a linkage port is formed at the upper end of the main cavity, a gear pin that can be inserted into the groove is provided in the main cavity, and a spring that makes the gear pin have a tendency to pop out of the linkage port, and an unlocking groove for the gear pin to pop out is provided on the password wheel; The inner fixing plate includes an inner fixing plate body and an inner handle cover extended from the inner fixing plate body, the inner handle includes an inner handle body and an inner handle rotating shaft extended from the inner handle body, the inner handle rotating shaft is connected inside the inner handle cover, and the positioning groove is formed on the inner handle rotating shaft, and the fixing protrusion is formed on the end surface of the inner fixing plate body.

2. The ball-shaped mechanical combination lock according to claim 1, characterized in that: The gear pin includes a body located in the main cavity, the spring is arranged between the body and the main cavity, the upper end of the body extends to form a baffle that can extend out of the linkage port, the front end of the baffle is formed with a guiding slope, and the outer end of the groove is provided with a pressing step.

3. The ball-shaped mechanical combination lock according to claim 1, characterized in that: A sub-cavity is formed on one side of the main cavity, and a guide flap is arranged in the sub-cavity. One side of the guide flap is connected to the inner wall of the sub-cavity, and the other side is connected to the gear pin.

4. The ball-shaped mechanical combination lock according to claim 1, characterized in that: The rotating shaft is divided into a rotating section and a clutch section, the diameter of the clutch section is larger than the diameter of the rotating section, the square core protrusion is formed on the rotating section and abuts against the annular notch, and the clutch section is confined within the handle connector and the outer handle.

5. The ball-shaped mechanical combination lock according to claim 1, characterized in that: The code wheel comprises a matching wheel sleeved on the clutch assembly and a toggle wheel connected to the outer periphery of the matching wheel, and a code change resistance spring is arranged between the matching wheel and the toggle wheel.

6. The ball-shaped mechanical combination lock according to claim 5, characterized in that: An unlocking resistance spring is arranged between the matching wheel and the clutch assembly.

7. The ball-shaped mechanical combination lock according to claim 5, characterized in that: The surface of the shifting wheel is formed with anti-skid patterns.

8. The ball-shaped mechanical combination lock according to claim 1, characterized in that: The square core is fixed on the inner handle rotating shaft, and the inner handle rotating shaft and the inner handle cover are both formed with top screw holes, and the top screw holes of the inner handle rotating shaft are connected with fixed top screws to fix the square core.

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