Coded lock

Abstract

The coded lock comprises a lock body, a coded ring and a lock head, the lock body comprises a lock sleeve and a lock bead, and on the basis, in the using process, when the lock head is inserted into the lock sleeve and the coded ring is in a staggered state, the lock bead can be located in an arc groove, the lock head cannot be separated from the lock sleeve, and the coded lock is in a locked state; when the password ring rotates to the correct position, at least part of the lock ball can be located in the receding groove, under the condition, the lock head is pulled, the lock head can be separated from the lock body, unlocking of the password lock is achieved, and the password lock is of a pure mechanical structure and is high in strength, low in failure rate, simple in structure and low in cost.

Description

Technical Field

[0001] This application relates to the field of lock technology, and more particularly to a combination lock. Background Technology

[0002] In everyday life, locks are mostly categorized into two main types: mechanical locks and combination locks, each with its own applications and advantages / disadvantages. Combination locks can be further divided into three main types: mechanical combination locks, electronic combination locks, and hybrid electromechanical combination locks. Electronic and hybrid electromechanical combination locks have seen rapid development due to their complex and diverse keys and reliable performance. However, their reliance on electricity, the delicate nature and short lifespan of their electrical components, demanding operating environments, and high manufacturing costs limit their widespread adoption in some simple applications. Mechanical combination locks, on the other hand, are mostly complex in structure, bulky, and heavy, resulting in high manufacturing costs. Small mechanical combination locks, however, often have overly simple structures, low structural strength, and compromised security.

[0003] Therefore, it is particularly necessary to design, research and develop a purely mechanical "direct-insertion simple pin tumbler combination lock" for lock applications such as bicycles and motorcycles, where the use is more frequent and the users are more limited. Summary of the Invention

[0004] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This part of the invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0006] In view of this, a combination lock is proposed according to an embodiment of this application, comprising:

[0007] The lock body includes a lock sleeve and a lock ball, the lock sleeve having a lock ball hole, and the lock ball being disposed in the lock ball hole;

[0008] A combination ring, which is fitted onto a lock sleeve, and a clearance groove is formed on the combination ring;

[0009] A lock head, which is used to be inserted into the lock sleeve, and has an arc-shaped groove formed on the lock head;

[0010] Specifically, the lock is unlocked when the combination ring is correctly aligned and at least part of the lock bead is located within the clearance groove; the lock is locked when the combination ring is misaligned and the lock bead is located within the arc groove.

[0011] In one possible implementation, the diameter of the lock bead hole is smaller than the diameter of the lock bead, so that only a portion of the lock bead can pass through the lock bead hole and be located within the arcuate groove;

[0012] The depth of the arc-shaped groove is 1.5 mm to 2 mm.

[0013] In one feasible implementation, the lock body further includes:

[0014] A positioning disc is fitted onto the lock sleeve, and an installation gap is formed between the positioning disc and the lock sleeve. The combination ring is disposed within the installation gap.

[0015] In one feasible implementation, the lock sleeve is further provided with an alignment mark, and the combination ring is provided with a plurality of numerical marks, the alignment mark being configured to be positioned relative to the numerical marks.

[0016] In one feasible implementation, the lock body further includes:

[0017] A base body, the base body being connected to the locking sleeve;

[0018] A locking rod, one end of which is connected to the base and the other end of which is connected to the lock head.

[0019] In one feasible implementation, the combination lock further includes:

[0020] A limiting groove is formed on the password ring;

[0021] A reset component is disposed within the limiting groove, and one end of the reset component is connected to the inner wall of the limiting groove.

[0022] The other end of the reset member is connected to the positioning bead, so that the positioning bead abuts against the side wall of the lock sleeve or the side wall of the positioning disc.

[0023] Compared with the prior art, the present invention has at least the following beneficial effects:

[0024] The combination lock provided in this application includes a lock body, a combination ring, and a lock head. The lock body includes a lock sleeve and a lock ball. Based on this, during use, when the lock head is inserted into the lock sleeve and the combination ring is misaligned, the lock ball will be in the arc groove, and the lock head cannot disengage from the lock sleeve, so the combination lock is in a locked state. When the combination ring is rotated to the correct position, at least part of the lock ball can be located in the clearance groove. In this case, pulling the lock head can disengage it from the lock body, thus unlocking the combination lock. This combination lock adopts a purely mechanical mechanism, which has high strength, low failure rate, and simple structure and low cost.

[0025] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0026] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0027] Figure 1 A schematic structural diagram illustrating the unlocking state of a combination lock according to an embodiment of this application;

[0028] Figure 2 A schematic structural diagram of the lock head of a combination lock according to one embodiment of this application;

[0029] Figure 3 A schematic structural diagram of the lock sleeve of a combination lock according to an embodiment of this application;

[0030] Figure 4 A schematic structural diagram of the lock body of a combination lock according to an embodiment of this application;

[0031] Figure 5 A schematic structural diagram of the first angle of the combination ring of a combination lock according to an embodiment of this application;

[0032] Figure 6 A schematic structural diagram of the second angle of the combination ring of a combination lock according to an embodiment of this application;

[0033] Figure 7 A schematic structural diagram illustrating the locking state of a combination lock according to an embodiment of this application;

[0034] Figure 8 A schematic structural diagram of the unlocked state of a combination lock according to one embodiment of this application from another angle;

[0035] Figure 9 This is a schematic structural diagram of the locked state of a combination lock according to an embodiment of this application from another angle.

[0036] in, Figures 1 to 9 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0037] 110 Lock body, 120 Combination ring, 130 Lock cylinder, 140 Limiting groove, 150 Reset component, 160 Positioning bead;

[0038] 111 Lock sleeve, 112 Lock ball, 113 Lock ball hole, 114 Positioning plate, 115 Base, 116 Lock rod, 121 Relief groove, 131 Arc groove. Detailed Implementation

[0039] The following description provides numerous specific details to offer a more thorough understanding of the technical solutions provided by this invention. However, it will be apparent to those skilled in the art that the technical solutions provided by this invention can be implemented without one or more of these details.

[0040] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0041] Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the invention is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art.

[0042] like Figures 1 to 9 As shown in the embodiment of this application, a combination lock is proposed, comprising: a lock body 110, the lock body 110 including a lock sleeve 111 and a lock bead 112, the lock sleeve 111 having a lock bead hole 113, the lock bead 112 being disposed within the lock bead hole 113; a combination ring 120, the combination ring 120 being sleeved on the lock sleeve 111, the combination ring 120 having a clearance groove 121 formed thereon; and a lock head 130, the lock head 130 being inserted into the lock sleeve 111, the lock head 130 having an arc groove 131 formed thereon; wherein, when the combination ring 120 is accurately aligned and at least part of the lock bead 112 is located within the clearance groove 121, the lock head 130 is unlocked; when the combination ring 120 is misaligned and the lock bead 112 is located within the arc groove 131, the lock head 130 is locked.

[0043] The combination lock provided in this application embodiment includes a lock body 110, a combination ring 120, and a lock head 130. The lock body 110 includes a lock sleeve 111 and a lock ball 112. Based on this, during use, when the lock head 130 is inserted into the lock sleeve 111 and the combination ring 120 is in a misaligned state, the lock ball 112 will be in the arc groove 131, and the lock head 130 cannot be disengaged from the lock sleeve 111, so the combination lock is in a locked state. When the combination ring 120 is rotated to the correct position, at least part of the lock ball 112 can be located in the relief groove 121. In this case, pulling the lock head 130 will disengage it from the lock body 110, thereby unlocking the combination lock. This combination lock adopts a purely mechanical mechanism, which has high strength, low failure rate, and simple structure and low cost.

[0044] It is understood that the clearance groove 121 is set relative to the exact position of the combination ring 120. The combination lock provided in this application embodiment does not require changing the password and is particularly suitable for use as a frequently used lock such as bicycles and motorcycles.

[0045] like Figure 3 As shown, in one feasible embodiment, the diameter of the lock bead hole 113 is smaller than the diameter of the lock bead 112, so that only a portion of the lock bead 112 can pass through the lock bead hole 113 and be located within the arcuate groove 131; wherein the depth of the arcuate groove 131 is 1.5 mm to 2 mm.

[0046] This design prevents all of the lock beads 112 from falling into the lock bead hole 113, allowing a portion of the lock beads 112 to pass through the lock bead hole 113 and be positioned within the arc groove 131, facilitating the locking and unlocking of the lock head 130. By selecting a depth of 1.5 mm to 2 mm for the arc groove 131, the sensitivity of the lock head 130 in unlocking can be improved.

[0047] like Figure 4 As shown, in one feasible embodiment, the lock body 110 further includes: a positioning disk 114, which is sleeved on the lock sleeve 111, and an installation gap is formed between the positioning disk 114 and the lock sleeve 111, and the password ring 120 is disposed in the installation gap.

[0048] In this technical solution, the lock body 110 may also include a positioning disk 114. The red lettering on the positioning disk 114 facilitates the high-precision positioning of the combination ring 120, which can further improve the reliability of the combination lock tooling.

[0049] In one feasible implementation, the lock sleeve 111 also has alignment marks, and the combination ring 120 has multiple numerical markings. The alignment marks are used to be positioned opposite the numerical markings. This arrangement makes it easier for the user to rotate the combination ring 120 and to determine its exact position.

[0050] like Figure 3 As shown, in one feasible embodiment, the lock body 110 further includes: a base 115 connected to the lock sleeve 111; and a lock rod 116, one end of which is connected to the base 115 and the other end of which is connected to the lock head 130.

[0051] In this technical solution, the structural composition of the lock body 110 is further provided. The lock body 110 may also include a base 115 and a locking rod 116. The base 115 facilitates the assembly of the locking rod 116.

[0052] It is understood that the specific style of the locking bar 116 is not specified in this application, and the locking bar 116 can adopt any style of locking bar 116 structure in conventional technology.

[0053] like Figure 7 As shown, in one feasible embodiment, the combination lock further includes: a limiting groove 140, which is formed on the combination ring 120; a reset member 150, which is disposed in the limiting groove 140, with one end of the reset member 150 connected to the inner wall of the limiting groove 140; and a positioning bead 160, with the other end of the reset member 150 connected to the positioning bead 160, so that the positioning bead 160 abuts against the side wall of the lock sleeve 111 or the side wall of the positioning disc 114.

[0054] In this technical solution, the password ring 120 may include a limiting groove 140, a reset member 150, and a positioning bead 160. A ring-shaped slide can be formed on the lock sleeve 111 and the positioning disk 114. Under normal working conditions, the reset member 150 can apply elastic force to the positioning bead 160, which can make the positioning bead 160 abut against the slide, making the rotation of the password ring 120 more stable.

[0055] Understandably, the stepped surface at the right end of the lock sleeve 111 serves as the limiting surface for the combination rings 120, with ten positioning pits for the combination rings 120 formed on this surface. Ten reference marking surfaces are machined equally on the outer circumference of the step; these reference marking surfaces serve as alignment marks, maintaining a specific correspondence with the lock ball holes 113. Two lock ball holes 113 are machined on the lock sleeve 111 for each combination ring 120. The lock ball holes 113 provide space for the movement of the lock ball 112; they are open outwards but restrict the lock ball 112 to protrude only 2mm inwards. A mounting space for the positioning plate 114 is designed in the middle of the lock sleeve 111, with a fixing threaded hole for the positioning plate 114. A fixing hole for the seat 115 is designed at the left end of the lock sleeve 111.

[0056] Understandably, ten positioning pits for the password rings 120 are opened on each of the left and right end faces of the positioning disk 114 for positioning the password rings 120 when they rotate. Stepped holes for fixing screws are designed on the outer circumference.

[0057] Understandably, the base 115 primarily serves to connect the lock sleeve 111 and the lock rod 116. It also features ten positioning recesses for the combination rings 120 on its right end face for positioning during rotation. Two stepped holes for fixing screws are symmetrically positioned on the outer cylindrical surface. For safety reasons, when the base 115 is screwed into the lock sleeve 111, the screw holes are manually hammered to reduce their opening after tightening, preventing easy disassembly of the fixing screws.

[0058] Understandably, the outer cylindrical surface of the combination ring 120 is divided into ten equal parts and inscribed with the digits 0-9. The inner cylindrical surface is the mating surface between the combination ring 120 and the lock sleeve 111, and the mating type is an F / h clearance fit. Two symmetrically arranged ball clearance grooves 121 are arranged on the inner cylindrical surface, and the opening position of the clearance grooves 121 corresponds to the digits on the outer circumference. Two positioning ball mounting holes 160 are symmetrically arranged on one end face of the combination ring 120. The position of these mounting holes matches the position of the positioning pits on the lock sleeve 111, the positioning plate 114, and the base 115.

[0059] Understandably, the positioning bead 160 is an N3X4 stepless positioning bead 160. Positioning when the combination ring 120 rotates is achieved by the positioning bead 160. The positioning bead 160 is installed in the mounting hole on the end face of the combination ring 120, and the positioning ball is positioned in the recess when it slides over the positioning pits on the end faces of the positioning plate 114, the lock sleeve 111, and the base 115.

[0060] In some examples, the assembly process of a combination lock includes the following steps:

[0061] 1) Connect one end of the lock cylinder 130 to the lock rod 116, and the other end of the lock rod 116 to the base 115; 2) Insert the lock ball 112 into the lock ball hole 113 of the lock sleeve 111; 3) Place the two combination rings 120 back to back, with the positioning bead 160 facing outwards at the end face of the lock sleeve 111; 4) Insert the positioning plate 114 and fix it with screws; 5) Insert the two more combination rings 120, keeping the positioning bead 160 facing outwards; 6) Connect the base 115, which has been equipped with the lock rod 116, to the lock sleeve 111, fix it with screws and reduce the opening; 7) Connect the lock cylinder 130 to the lock rod 116.

[0062] The unlocking and locking process includes the following steps:

[0063] 1. The lock ball 112 is placed inside the spring hole of the lock sleeve 111. It can protrude about 2mm in the direction of the lock head 130 and can move freely in the opposite direction. The lock ball 112 is the key component for locking the lock body 110 and the lock head 130.

[0064] 2. The combination ring 120 can be rotated in any direction around the axis of the lock sleeve 111 at the position of the lock ball 112. During the rotation, when the lock ball 112 is aligned with the clearance groove 121 of the combination ring 120, the lock ball 112 can move freely up and down (i.e., the unlocked state). When it misses the clearance groove 121, the lock ball 112 is pressed into the spring hole of the lock sleeve 111 by the inner surface of the combination ring 120 and cannot move up and down (i.e., the locked state).

[0065] 3. When in use, the lock head 130 is inserted into the lock body 110 hole with the combination ring 120 in the unlocked state, and the arc groove 131 of the lock head 130 corresponds to the lock ball 112 in the corresponding position.

[0066] 4. Rotate each combination ring 120. The combination ring 120 forces the lock ball 112 to lock in the arc groove 131, thereby locking the lock head 130 and the lock body 110.

[0067] 5. To unlock, rotate each combination ring 120 in sequence until the lock bead 112 is aligned with the clearance groove 121 of the combination ring 120, then pull out the lock head 130 to unlock.

[0068] The process calculations for the combination lock provided in this application embodiment include the following steps:

[0069] Process calculation

[0070] 1. Pulling force: The force that the lock head 130 exerts to forcefully and destructively pull the lock body 110 out when it is locked.

[0071] In the locked state, each combination ring 120 controls two locking beads 112 to be engaged within the arc-shaped groove 131. When pulled out, the points of stress are: the contact area between the locking bead 112 and the arc-shaped groove 131, the contact area between the locking bead 112 and the side of the pin hole in the lock body 110, and the contact area between the locking bead 112 and the inner hole of the combination ring 120. If forcibly pulled out, one component at any of these stress points will inevitably be damaged. Through stress analysis and comparison, the contact area between the locking bead 112 and the arc-shaped groove 131 has the smallest bearing area and the greatest stress, making it the weakest point. Therefore, this area is used for strength verification.

[0072] Because the pins are heat-treated rolling bearing pins, and the lock head 130 is made of tempered 45 steel, compared to the material strength of the lock ball 112 and the lock head 130, it is highly likely that the arc groove 131 will fail due to plastic deformation caused by shear force at the stress-bearing part. In this case, the pulling force F=R el *S,

[0073] In the formula, Rel is the yield strength of 45 steel, in MPa.

[0074] S represents the projected area of ​​the contact area between the lock bead 112 and the groove of the lock body 110 in the pulling direction, in mm. 2 .

[0075] Taking the locking ball 112 with a diameter of 5mm, the arc groove 131 with a depth of 1.5mm, the yield strength of 45 steel of 355MPa, and the force exerted on two locking balls 112 as an example, the calculation is as follows:

[0076] F=2R el *S=2*355*4.531=3217N≈321.7Kg

[0077] This is the pulling force of a cipher ring 120 when it is in operation, which is also the minimum destructive force.

[0078] When all four combination rings 120 are locked simultaneously, the maximum pulling force is: F max =4F=4*321.7=1286.8 (Kg)

[0079] Under normal circumstances, the pulling force is between 320Kg and 1287Kg. It is impossible for an ordinary person to achieve this destructive force without the help of external force, which proves that the locking force is reliable.

[0080] 2. Secure calculation of the key

[0081] Each combination ring 120 is divided into ten numbers from 0 to 9 around its outer perimeter, and there are four combination rings 120 in total. Ten reference lines are set around the outer perimeter of the lock sleeve 111 boss, which also function as another combination ring 120. The lock can only be opened when the numbers on the four combination rings 120 are correctly arranged and aligned with the reference lines. Thus, the number of possible combination combinations is:

[0082] N=C 1 10 *C 1 10 *C 1 10 *C 1 10 *C 1 10 *=10 5 indivual

[0083] It is quite difficult to crack such a large number of password combinations in a short period of time, which proves that the key is highly secure.

[0084] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0085] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0086] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0087] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A combination lock, characterized in that The application relates to a password lock, which comprises a lock body, a password ring and a lock head. The lock body comprises a lock sleeve and a lock bead, the lock sleeve is provided with a lock bead hole, and the lock bead is arranged in the lock bead hole. The password ring is sleeved on the lock sleeve and is provided with a concave groove. The lock head is inserted into the lock sleeve and is provided with a circular arc groove. When the password ring is correctly positioned and at least part of the lock bead is arranged in the concave groove, the lock head is unlocked; when the password ring is incorrectly positioned and the lock bead is arranged in the circular arc groove, the lock head is locked.

2. The password lock according to claim 1, wherein the diameter of the lock bead hole is smaller than the diameter of the lock bead, so that only part of the lock bead can be arranged in the circular arc groove through the lock bead hole. The depth of the circular arc groove is 1.5-2 mm. The lock body further comprises a positioning disc, the positioning disc is sleeved on the lock sleeve, and an installation gap is formed between the positioning disc and the lock sleeve.

3. The combination lock of claim 1, wherein, 4. The password lock according to claim 3, wherein the lock sleeve is further provided with a positioning mark, the password ring is provided with a plurality of digital marks, and the positioning mark is arranged opposite to the digital marks. The lock body further comprises a seat body connected to the lock sleeve and a lock rod, one end of the lock rod is connected to the seat body, and the other end of the lock rod is connected to the lock head. The password ring is further provided with a limiting groove, a reset member is arranged in the limiting groove, one end of the reset member is connected to the inner wall of the limiting groove, the other end of the reset member is connected to a positioning bead, and the positioning bead abuts against the side wall of the lock sleeve or the side wall of the positioning disc. ​ 5. The combination lock of claim 1, wherein, ​ ​ ​ 6. The combination lock of claim 1, wherein, ​ ​ ​ ​

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