Coded lock box

Abstract

A coded lock box comprises a lock box assembly and a lock cylinder assembly, the lock cylinder assembly and the lock box assembly are rotationally buckled together, the lock cylinder assembly is provided with a lock column combination, and the lock column combination is provided with a lock plate and a lock column matched with the lock plate; a locking plate hole is formed in the locking plate, a curved-surface locking groove is formed in the locking plate hole, and the curved-surface locking groove at least comprises a first transition section and a second transition section connected with the first transition section; the lock column is provided with a middle column, and grooves in sliding fit with the first transition section and the second transition section are formed in the circumferential surface of the middle column. The product not only is simple and firm in structure, but also is higher in use safety.

Description

Technical Field

[0001] This utility model belongs to the field of lock technology, specifically relating to a keypad combination lock, and more specifically to a combination lock box. Background Technology

[0002] Locks have long been widely used in various places in people's daily lives to ensure the safety of living or using spaces, or to prevent intentional theft and accidental removal of items.

[0003] Then, if a user accidentally loses or misplaces their key, the lock cannot be opened, resulting in additional expenses and inconvenience such as having to call a locksmith or damage the lock. Therefore, lock boxes for storing keys have appeared on the market to avoid the above situations.

[0004] In addition, when people go out, they may lose their personal belongings such as hotel room keys, room cards, and valuables such as mobile phones. In such cases, a lockbox is needed to keep them safe.

[0005] Therefore, combination lock boxes are a common type of lock, often used in renovation sites and construction sites, or in lock boxes to facilitate workers' access to the site and prevent situations where they forget their keys.

[0006] In the structure of a combination lock box, the locking or unlocking effect is achieved through the interaction between the lock plate and the lock pin. In existing technology, the lock plate usually has multiple rows of horizontal holes with uniform tangents, while the lock pin has openings at the top and bottom. The vertical movement of the lock plate is limited by the inner diameter of the lock pin, which restricts the range of vertical movement of the lock plate when locking. This allows thieves to sense the uniform tangents of the horizontal holes by operating the buttons, thereby determining the correct opening position of the lock pin and illegally unlocking the lock by feel, thus greatly reducing the security of the combination lock box.

[0007] Therefore, it is necessary to provide an improved combination lock box to significantly improve the security of combination locks and increase the difficulty for thieves to unlock them. Utility Model Content

[0008] The purpose of this invention is to solve the above-mentioned problems and provide a combination lock box.

[0009] To achieve the objectives of this utility model, the following technical solution is adopted:

[0010] A combination lock box includes: a lock box assembly and a lock cylinder assembly rotatably fastened together with the lock box assembly. The lock cylinder assembly has a lock pin assembly, which includes a lock plate and a lock pin that cooperates with the lock plate. The lock plate has a lock plate hole and a curved lock groove, which includes at least a first gradient section and a second gradient section that connects to the first gradient section. The lock pin has a central pin, and a groove is formed on the circumferential surface of the central pin that slides with the first gradient section and the second gradient section.

[0011] Preferably, the curved locking groove further includes a third gradient segment that connects with the second gradient segment.

[0012] Preferably, the locking pin assembly further comprises a locking pin box in which the locking plate is disposed, a locking pin safety plate disposed on the locking plate, and a locking pin cover fixed to the locking pin box; the locking pin passes through the locking pin safety plate and the locking plate, and the locking pin elastically presses against the locking pin box and the locking pin cover.

[0013] More preferably, a pair of radially symmetrical and axially extending anti-rotation grooves are formed on the central column; a locking pin opening is provided on the locking pin safety plate for the locking pin to pass through, and a protrusion is formed in the locking pin opening that can be inserted into the anti-rotation groove; the protrusion is configured such that: when the locking pin safety plate is at a first height position, the protrusion disengages from the anti-rotation groove; when the locking pin safety plate is at a second height position lower than the first height position, the protrusion extends into the anti-rotation groove.

[0014] Preferably, the locking pin assembly further includes a reset pin, which has an arc-shaped rotating portion with a flat portion formed on it. One end of the rotating portion forms a driving pin, and a driving groove is formed on the end face of the driving pin. A driving hole is formed at the bottom of the locking pin safety plate. The arc-shaped rotating portion of the reset pin extends into the driving hole. The reset pin is configured such that: when the driving groove is rotated, the reset pin rotates; when the arc-shaped rotating portion contacts the bottom of the driving hole, the locking pin safety plate is at the second height position; when the driving groove continues to rotate, causing it to contact the bottom of the driving hole, the locking pin safety plate moves upward from the second height position to the first height position.

[0015] Optionally, the lock cylinder assembly further includes a button safety plate disposed at the bottom of the lock cylinder box, a panel disposed on the button safety plate, and a button elastically disposed between the panel and the bottom of the lock cylinder box; the lock cylinder protrudes from the bottom of the lock cylinder box, and the button maintains contact with the corresponding lock cylinder.

[0016] Preferably, the top inner side of the lock box body of the lock box assembly extends laterally outward to form a hook plate; the top of the lock plate hooks with the hook plate to lock the combination lock box; the top of the lock plate has a lifting hole, which has a top groove, a bottom groove and an oblique groove communicating with both; the button safety plate has a button window corresponding to the button, and the bottom of the button safety plate forms a positioning tongue; the safety plate spring is elastically disposed between the positioning tongue and the panel; the lock cylinder assembly further includes a push button, which includes a push plate horizontally slidably disposed on the panel and a toggle post extending from one end face of the push plate; the toggle post passes through the panel and extends into the lifting hole.

[0017] Optionally, a limiting step is formed on the end face of the actuating column of the push button; an arc-shaped notch is opened at the top of the button safety plate; the lock cylinder assembly further includes a pressure plate, and a locking block is formed at the bottom of the pressure plate; a limiting groove is opened at the top of the lock column safety plate; the pressure plate passes through the actuating column and is installed on the end face of the push plate; the limiting step is configured to be locked in the limiting groove, and the locking block is configured to be locked in the arc-shaped notch.

[0018] Preferably, it further includes a normally open and normally closed assembly, which includes an actuating block and a reset knob that slides obliquely with the actuating block. The actuating block includes a sliding frame and an elastic frame disposed on the sliding frame. A first slope is formed at the bottom of the sliding frame, and elastic plates are disposed on the left and right sides of the elastic frame. A second slope is formed on the reset knob that cooperates with the first slope. The actuating block is disposed on the side surface of the lock pin safety plate near the lock pin box, and the elastic plates abut against the inclined plate, thereby restricting the axial movement of the lock pin.

[0019] Preferably, the lock further includes a hook unlocking assembly for removing the hook from the top of the lock box body. The hook unlocking assembly is disposed on the inner side of the top of the lock box body and includes: a sliding seat with a lower hook hole thereon and an upper sliding seat with an upper hook hole thereon. The upper sliding seat and the sliding seat are engaged with each other. A pair of unlocking handles are slidably disposed laterally in the sliding seat, and the bottom ends of the pair of unlocking handles extend from the bottom of the sliding seat. Each unlocking handle has a latch at its top, and a transverse spring is disposed between the two latches. The ends of the two latches that are far apart from each other form arc-shaped concave edges.

[0020] Compared with the prior art, the advantages of this utility model are as follows:

[0021] In this invention, the curved lock groove has multiple gradient segments, including a first gradient segment and a second gradient segment connected to the first gradient segment. These gradient segments are interconnected to form a relatively complex curved surface shape, rather than a simple arc surface shape. Correspondingly, grooves that slide and cooperate with these gradient segments are formed on the circumferential surface of the central column of the lock pin. Therefore, this design greatly increases the complexity of the curved lock groove shape, making it much more difficult for unauthorized personnel to determine the correct password key by touch, and further enhancing the security of the combination lock box.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0024] Figure 1 This is a perspective structural diagram of a combination lock box according to an embodiment of the present invention.

[0025] Figure 2 This is a perspective view of the protective shell of a combination lock box according to an embodiment of the present invention after it has been opened relative to the lock box assembly.

[0026] Figure 3 This is a perspective view of a combination lock box in the unlocked state according to an embodiment of the present invention.

[0027] Figure 4 This is an exploded perspective view of a combination lock box according to an embodiment of the present invention.

[0028] Figure 5a This is an exploded perspective view of the lock cylinder assembly of a combination lock box according to an embodiment of the present invention.

[0029] Figure 5b This is an exploded perspective view of the lock pin assembly of a combination lock box according to an embodiment of the present invention.

[0030] Figure 5c This is a perspective structural diagram of the reset post of a combination lock box according to an embodiment of the present invention.

[0031] Figure 6a This is an exploded perspective view of the hook unlocking assembly of a combination lock box according to an embodiment of the present invention.

[0032] Figure 6b This is an exploded perspective view of the lock body of a combination lock box according to an embodiment of the present invention.

[0033] Figure 7a This is a plan view of the lock cylinder assembly of a combination lock box according to an embodiment of the present invention.

[0034] Figure 7b This is a planar sectional view of the lock cylinder assembly of a combination lock box according to an embodiment of the present invention, showing the lock plate in the unlocked state and the lock cylinder safety plate restricting the rotation of the lock cylinder.

[0035] Figure 7c This is a planar sectional view of the lock cylinder assembly of a combination lock box according to an embodiment of the present invention, showing the lock plate in the unlocked state and the lock cylinder safety plate not restricting the rotation of the lock cylinder.

[0036] Figure 7d This is a planar sectional view of the lock cylinder assembly of a combination lock box according to an embodiment of the present invention, showing that the button safety plate does not obstruct the pressing action of the buttons.

[0037] Figure 7e This is a planar sectional view of the lock cylinder assembly of a combination lock box according to an embodiment of the present invention, showing that the button safety plate has the effect of blocking the pressing action of the button.

[0038] Figure 7f This is a planar sectional view of the lock cylinder assembly of a combination lock box according to an embodiment of the present invention, showing the spatial positional relationship between the toggle block and the lock pin.

[0039] Figure 8 This is a perspective structural diagram of the locking pin of a combination lock box according to an embodiment of the present invention.

[0040] Figure 9 This is a perspective view of the push button of a combination lock box according to an embodiment of the present invention.

[0041] Figure 10a This is a perspective view of the keypad of a combination lock box according to an embodiment of the present invention.

[0042] Figure 10b This is a perspective view of the keypad of a combination lock box according to an embodiment of the present invention from another angle.

[0043] Figure 11 This is a perspective structural diagram of the lock cylinder box of a combination lock box according to an embodiment of the present utility model.

[0044] Figure 12 This is a perspective view of the lock pin cover of a combination lock box according to an embodiment of the present invention.

[0045] Figure 13This is a perspective view of the lock pin safety plate of a combination lock box according to an embodiment of the present invention.

[0046] Figure 14 This is a perspective view of the keypad safety plate of a combination lock box according to an embodiment of the present invention.

[0047] Figure 15 This is an exploded perspective view of the normally open and normally closed component of a combination lock box according to an embodiment of the present invention.

[0048] Figure 16 This is a perspective view of the lock plate of a combination lock box according to an embodiment of the present invention. Detailed Implementation

[0049] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model and should not be construed as limiting this utility model.

[0050] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, and / or components, nor does it exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connection or wireless coupling. The term “and / or” as used herein includes all or any unit and all combinations of one or more associated listed items.

[0051] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0052] According to one embodiment of the present invention, in conjunction with Figure 1-16 A combination lock box 100 includes:

[0053] Lock box assembly 10 and lock cylinder assembly 20 which is rotated together with the lock box assembly 10.

[0054] The lock box assembly 10 provides internal space for storing user items, such as valuables like mobile phones and keys. By interlocking the lock box assembly 10 with the lock cylinder assembly 20, this space is locked to prevent unauthorized removal of items. Authorized personnel can unlock the lock by operating the lock cylinder assembly 20, for example, by entering the correct password.

[0055] In this utility model, the lock cylinder assembly 20 has a lock pin assembly 22, the lock pin assembly 22 has a lock plate 226 and a lock pin 228 that cooperates with the lock plate 226.

[0056] Special Reference Figure 16 The locking plate 226 has a locking plate hole 2262, and the locking plate hole 2262 has a curved locking groove 22622. The curved locking groove 22622 includes at least a first gradient segment 22621 and a second gradient segment 22622 connected to the first gradient segment 22621.

[0057] Special reference Figure 8 The locking pin 228 has a central pin 2286, and a groove 22864 is formed on the circumferential surface of the central pin 2286 to slide in conjunction with the curved locking groove 22622.

[0058] In a preferred embodiment, the curved locking groove 22622 further includes a third gradient segment 22623 that connects with the second gradient segment 22622.

[0059] Note: This invention does not specify the number of interconnectable gradient segments. More gradient segments can be designed as needed to increase the complexity of the curved lock groove, thereby significantly increasing the difficulty for unauthorized personnel to determine the correct keypad by touch, thus further enhancing the product's security.

[0060] Specifically, the lock plate 226 features an infinite pass-through design and a gradient lock plate hole to prevent unauthorized unlocking by touch. The lock plate is designed with a longitudinal side detection mode, which works in conjunction with the groove 22864 of the lock pin 228, greatly optimizing the up-and-down movement of the lock plate 226 and helping to form a larger locking area when the lock plate 226 is closed.

[0061] For example, in one embodiment of this utility model, the lock plate 226 has three rows of longitudinally arranged lock plate holes 2262. Each lock plate hole 2262 has, for example, four crescent-shaped grooves (i.e., curved lock grooves 22622) on its right side, totaling 12 grooves, which cooperate with 12 lock pins 228. When the groove 22864 on the right side of the lock pin 228 corresponds to the same height as the lock plate 226, the lock plate 226 can pass through the groove 22864 vertically, which is the unlocked state. If the groove 22864 does not correspond to the same height as the lock plate, the lock plate cannot pass through, and the circumferential surface of the lock pin 228 is located within the crescent of the lock plate 226, which is the locked state.

[0062] To prevent unauthorized unlocking, the lock plate is designed with multiple features, such as the 12 crescent-shaped arcs (i.e., curved lock grooves 22622), which are not of uniform size. The tangent lines of the 12 crescent-shaped arcs on the lock plate and the arc of the lock pin vary, starting from 0.2mm at the center of the arc and then decreasing to 0.3mm, 0.4mm, 0.5mm, and 0.6mm. This unevenness and randomness makes it difficult for thieves to unlock the lock by feel, as they will be misled.

[0063] In one embodiment, the locking pin assembly 22 further includes a locking pin box 222 in which the locking plate 226 is disposed, a locking pin safety plate 221 disposed on the locking plate 226, and a locking pin cover 224 fastened to the locking pin box 222. Here, the locking pin 228 passes through the locking pin safety plate 221 and the locking plate 226, and the locking pin 228 is elastically pressed between the locking pin box 222 and the locking pin cover 224.

[0064] Here, the locking pin 228 can be achieved by, for example Figure 5b The compression spring 225 shown presses against the lock pin box 222 and the lock pin cover 224.

[0065] The central post 2286 of the locking post 228 forms a pair of radially symmetrical and axially extending anti-rotation grooves 22862; correspondingly, the locking post safety plate 221 has a locking post opening 2212 for the locking post 228 to pass through, and a protrusion 22122 that can be inserted into the anti-rotation groove 22862 is formed in the locking post opening 2212.

[0066] Specifically, such as Figure 7c As shown, when the lock pin safety plate 221 is in the first height position, the protrusion 22122 disengages from the anti-rotation groove 22862. In this case, since the anti-rotation groove 22862 is not blocked by the protrusion 22122, the lock pin 228 can be rotated freely, for example, to set a password. Figure 7bAs shown, when the locking pin safety plate 221 is in the second height position (lower than the first height position), the protrusion 22122 is inserted into the anti-rotation groove 22862. In this case, since the anti-rotation groove 22862 is blocked by the protrusion 22122, the locking pin 228 cannot be rotated. This prevents the locking pin 228 from being unintentionally rotated, which could lead to a chaotic rotation angle and consequently, operational difficulties or even malfunction. The cooperation between the anti-rotation groove 22862 and the protrusion 22122 also enables the latter to guide the axial movement of the locking pin 228, ensuring that the locking pin 228 always moves axially and cannot rotate circumferentially.

[0067] As for adjusting the vertical position of the locking pin safety plate 221, such as adjusting it from a first height position to a second height position, or vice versa, it can be achieved through various designs. In one embodiment, the locking pin assembly 22 also has a reset pin 227, which has an arc-shaped rotating portion 2272. A flat portion 22722 is formed on the arc-shaped rotating portion 2272, and a drive pin 2274 is formed at one end of the rotating portion 2272. A drive groove 22742 is formed on the end face of the drive pin 2274. A drive hole 2216 is formed at the bottom of the locking pin safety plate 221. The arc-shaped rotating portion 2272 of the reset pin 227 extends into the drive hole 2216. When the user uses a tool such as a flathead screwdriver and inserts it into the drive slot 22742, the reset pin 227 rotates. When the arc-shaped rotating part 2272 contacts the bottom of the drive hole 2216, the locking pin safety plate 221 is in the second height position. When the reset pin 227 continues to rotate, so that the drive slot 22742 contacts the bottom of the drive hole 2216, the locking pin safety plate 221 moves from the second height position to the first height position. The principle is that the arc-shaped rotating part 2272 of the reset pin 227 and the drive slot 22742 and drive hole 2216 form a cam mechanism, so that the locking pin safety plate 221 can switch back and forth between the two height positions, thereby achieving the above effect.

[0068] In one embodiment, the lock cylinder assembly 20 further includes a button safety plate 26 disposed at the bottom of the lock cylinder box 222, a panel 28 disposed on the button safety plate 26, and a button 24 elastically disposed between the panel 28 and the bottom of the lock cylinder box 222; the lock cylinder 228 protrudes from the bottom of the lock cylinder box 222, and the button 24 maintains contact with the corresponding lock cylinder 228.

[0069] Here, the elastic state of button 24 can be achieved using, for example, a button spring 27. Furthermore, various alphanumeric symbols are printed or engraved on button 24 as password options. When the user enters the unlocking password by pressing button 24, the corresponding locking pin 228 is also axially pushed when button 24 is pressed. Only when the password is correct will the corresponding locking pin 228 be pressed down, thereby releasing the obstruction to the curved locking groove 22622 of the lock plate 226 (see reference). Figure 16 This allows the lock plate 226 to move up and down, thus enabling unlocking.

[0070] Specifically, such as Figure 4 As shown, the top inner side of the lock box body 12 of the lock box assembly 10 extends laterally outward to form a hook plate 102; when the user enters the correct password, the user can operate the lock plate 226, causing the lock plate 226 to move downward, thereby causing the top of the lock plate 226 to disengage from the hook plate 102, thereby allowing the user to rotate and open the lock cylinder assembly 20, and thus to perform storage and retrieval operations on the items inside the lock box assembly 10.

[0071] It should be noted that a window corresponding to button 24 is opened on panel 28, so that part of button 24 is exposed from the window, which makes it easier for users to operate button 24.

[0072] The user operates the lock plate 226, allowing it to move up and down when the password is correct. This can be achieved in the following ways:

[0073] refer to Figure 16 The top of the locking plate 226 has a lifting hole 2264, which has a top groove 22642, a bottom groove 22644, and an inclined groove 22646 communicating with both; Reference Figure 5a and Figure 14 The button safety plate 26 has a button window 262 corresponding to the button 24, and a positioning tongue 266 is formed at the bottom of the button safety plate 26; the safety plate spring 29 is elastically disposed between the positioning tongue 226 and the panel 28; the lock cylinder assembly 20 further includes a push button 23, the push button 23 includes a push plate 232 horizontally slidably disposed on the panel 28 and a toggle post 236 extending from one end face of the push plate 232; the toggle post 236 passes through the panel 28 and extends into the lifting hole 2264.

[0074] When the user enters the correct password, none of the locking pins 228 obstruct the locking plate 226 vertically. Therefore, the user only needs to push the push plate 232 horizontally to move the pin 236 horizontally. When the pin 236 slides from its initial position in the bottom groove 22644 through the inclined groove 22646 to the top groove 22642, the locking plate 226 moves downward, causing its top to disengage from the hook plate 102. This allows the user to rotate and open the lock cylinder assembly 20, and then access the items inside the lock box assembly 10. When the user pushes the push plate 232 in the opposite direction, the locking plate 226 moves in the opposite direction, ultimately achieving the hook state (locking) between the top of the locking plate and the hook plate 102.

[0075] Preferably, a limiting step 2362 is formed on the end face of the actuating column 236 of the push button 23; an arc-shaped notch 264 is provided on the top of the button safety plate 26; the lock cylinder assembly 20 further includes a pressure plate 25, and a locking block 252 is formed at the bottom of the pressure plate 25; a limiting groove 2218 is provided on the top of the lock column safety plate 221; the pressure plate 25 passes through the actuating column 236 and is installed on the end face of the push plate 323; the limiting step 2362 is configured to be locked in the limiting groove 2218, and the locking block 252 is configured to be locked in the arc-shaped notch 264.

[0076] The following details the interaction between the above components and the resulting technical effects. Figures 7a-7b The diagram shows the locking plate 226 in the locked state, with the actuating pin 236 located in the bottom groove of the locking plate 226. At this time, the drive groove 22742 is horizontal. Correspondingly, the limiting groove 2218 of the locking pin safety plate 221 does not contact the limiting step 2362, and the protrusion 22122 of the locking pin safety plate 221 blocks the anti-rotation groove 22862 of the locking pin 228. That is, when the locking pin safety plate 221 is in the second height position (lower than the first height position), the protrusion 22122 penetrates into the anti-rotation groove 22862. In this case, since the anti-rotation groove 22862 is blocked by the protrusion 22122, the locking pin 228 cannot be rotated. This prevents the locking pin 228 from being unintentionally rotated, which could lead to a chaotic rotation angle and consequently, operational difficulties or even malfunction. The cooperation between the anti-rotation groove 22862 and the protrusion 22122 also enables the latter to guide the axial movement of the locking pin 228, that is, to ensure that the locking pin 228 always moves axially and cannot rotate circumferentially.

[0077] like Figure 7cAs shown, when the drive groove 22742 rotates 90 degrees, it is in a vertical state. The limiting groove 2218 contacts the limiting step 2362. The protrusion 22122 disengages from the anti-rotation groove 22862. In this case, since the anti-rotation groove 22862 is not blocked by the protrusion 22122, the locking pin 228 can be rotated freely, for example, to set a password.

[0078] like Figure 7d As shown, under normal circumstances, the locking block 252 engages with the arc-shaped notch 264, meaning the lock plate is in the unlocked state, and the button safety plate 26 faces each button 24, allowing the buttons 24 to be freely operated, such as for entering a password. When the locking block 252 moves laterally, it disengages from the arc-shaped notch 264 and contacts the top edge of the button safety plate 26, causing the entire safety plate 26 to gradually move downwards. When the locking block 252 moves laterally to one end (e.g., ...), Figure 7e As shown, the entire lock plate is in a locked state. Correspondingly, the button safety plate 26 moves downward a certain distance, so that the top edge of the button window 262 inserts into the bottom of the corresponding button 24, thereby blocking the button 24. In this way, when the combination lock box is locked, unauthorized personnel cannot press the button 24, and naturally cannot perceive the correct password by touch.

[0079] Specifically, the button-operated safety plate 26 implements an anti-tactile unlocking function. Unauthorized unlocking occurs when someone, unaware of the combination lock box's password, first presses the push button 23 in the unlocking direction, causing the lock plate 226 and lock pin 228 to be pressed together. They then press the button 24 to feel the tactile sensation along the edges of the lock pin 228 and lock plate 226 to determine which button is the unlocking key, thus unlocking the lock without needing a password.

[0080] Additionally, if a user forgets to rotate the reset pin 227 90 degrees back to its original position after setting or changing the password, the locking groove 2218 of the lock pin safety plate 221 will be in contact with the limiting step 2362, and the toggle pin will be in the locked position, with the lock plate in a higher position, preventing the lock cylinder assembly of the combination lock box from closing. To allow the lock cylinder assembly of the combination lock box to close, the reset pin 227 must be rotated 90 degrees back to its original position, causing the lock pin safety plate 221 to move downwards. At this point, the locking groove 2218 of the lock pin safety plate 221 will disengage from the limiting step 2362.

[0081] Preferably, the push plate 232 of the push button 23 is provided with a protruding handle 234 protruding from the outer surface of the panel 28. The protruding handle 234 makes it easy for the user to push the push plate 232 to move in the horizontal or lateral direction, thereby facilitating the linkage between the push button 23 and the lock plate 226 and / or the button safety plate 26.

[0082] In addition, preferably, the locking pin safety plate 211 is provided with baffles 2214 on the left and right sides; a spring (not labeled) is provided between the bottom of the locking pin box 222 and the baffles 2214, and the spring compression ensures that the locking pin safety plate 211 is always in the first height position under normal circumstances.

[0083] Preferably, refer to Figure 16 The lock plate 226 has flanges 2266 on both sides; a spring (unlabeled) is provided between the bottom of the lock cylinder 222 and the flanges 2266. Through the spring's compression, the top of the lock plate 226 is always hooked to the hook plate 102, so that the entire combination lock box 100 is in a locked state.

[0084] Preferably, refer to Figure 8 A flange 2284 is formed at the bottom of the middle column 2286 of the locking column 228, a bottom column 2282 is formed at the bottom of the flange 2284, a pair of radially distributed inclined plates 2283 are formed on both sides of the top of the middle column 2286, and a push column 2288 is formed at the top of the pair of inclined plates 2283.

[0085] In one embodiment, password characters, including English letters or Arabic numerals, can be engraved on the end face of the base post 2282, so that users can set a password consisting solely of numbers, English letters, or a combination of both according to their preferences. Furthermore, an arrow can also be engraved on the end face to indicate the angle at which the lock post 228 needs to be rotated when setting the password, preventing incomplete rotation.

[0086] refer to Figure 12 The locking pin cover 224 has a limiting hole 2242; the bottom pin 2282 of the locking pin 228 extends into the limiting hole 2242, and the limiting hole 2242 restricts the axial movement path of the locking pin 228, ensuring accuracy. Similarly, refer to... Figure 11 The locking pin box 222 has a positioning hole 2222; the pushing pin 2288 of the locking pin 228 passes through the positioning hole 2222 and extends from the bottom of the locking pin box 222 so as to contact the button 24.

[0087] In one embodiment, reference Figure 7f and Figure 15 And refer to them together. Figure 8The combination lock box 100 also includes a normally open and normally closed assembly 200, which includes a toggle block 223 and a reset knob 2236 that slides obliquely with the toggle block 223. The toggle block 223 includes a sliding frame 2232 and an elastic frame 2234 disposed on the sliding frame 2232. A first ramp 22324 is formed at the bottom of the sliding frame 2232, and elastic pieces 22342 are disposed on the left and right sides of the elastic frame 2234. A second ramp 22362 that cooperates with the first ramp 22324 is formed on the reset knob 2236. The toggle block 2232... 3 is disposed on the side surface of the lock cylinder safety plate 221 near the lock cylinder box 222, and the elastic piece 22342 abuts against the inclined plate 2283, thereby restricting the axial movement of the lock cylinder 228. Therefore, after unlocking, the combination lock box is opened. After taking / putting in the object, the combination lock box is closed (normally open / closed state). That is, the push button 23 can be pushed left or right at any time to temporarily open / close the combination lock box (without needing to enter the password again). After the lock cylinder assembly of the combination lock box is closed, the push button 23 is pushed back to the center position, and the reset button 2236 is pressed to complete the locking.

[0088] Specifically, when the reset button 2236 is pressed, the second ramp 22362 pushes the first ramp 22324, causing the entire toggle block 223 to move downwards. This causes the elastic piece 22342 to also move downwards and away from the locking pin 228. This releases the axial restriction effect of the elastic piece 22342 on the ramp 2283 of the locking pin 228, allowing the locking pin 228 to move axially elastically and return to the locked position.

[0089] In one embodiment, reference Figure 6a Preferably, the combination lock box 100 further includes a hook unlocking assembly 50 for... Figure 4 The hook 40 shown is removed from the top of the lock box body 12.

[0090] The hook unlocking assembly 50 is disposed on the top inner side of the lock box body 12, and includes: a sliding seat 52 with a lower hook hole 522 thereon and an upper sliding seat 54 with an upper hook hole 542 thereon. The upper sliding seat 54 and the sliding seat 52 are engaged with each other. A pair of unlocking handles 56 are slidably disposed in the sliding seat 52, and the bottom ends of the pair of unlocking handles 56 extend from the bottom of the sliding seat 52. Each unlocking handle 56 has a latch 58 at its top, and a transverse spring 51 is disposed between the two latches 58. The ends of the two latches 58 that are far apart from each other form an arc-shaped concave edge 582. When a user opens the combination lock box 100, they can access two unlocking handles 56 located on the inner top side of the lock box body 12. By pushing the two unlocking handles 56 towards each other, after overcoming the pressure of the horizontal spring 51, the two unlocking handles 56 move closer together, causing the corresponding arc-shaped concave edges 582 on the two latches 58 to leave the hook 40, thus releasing the obstruction to the hook 40. For example, the end of the hook 40 can form a stepped structure (such as...). Figure 4 As shown, when the hook 40 passes through the upper hook hole 542 and extends into the lower hook hole 522, the arc-shaped concave edge 582 leaves the step structure, thus removing the obstruction to the step structure, allowing the user to easily remove the hook 40 from the lock box body 12.

[0091] To enhance the waterproof performance of the entire combination lock box 100, preferably, refer to Figure 6b A sealing ring 18 is provided on the side wall edge of the lock box body 12, and the sealing ring 18 forms a sealing effect between the side wall edge of the lock box body 12 and the side wall edge of the lock cylinder assembly 10.

[0092] In addition, a cover plate 16 can be provided on the inner rear end of the lock box body 12. A key hook 11 can be provided on the cover plate 16 so that the user can put the key inside the lock box body 12 and hang it on the key hook 11.

[0093] Preferably, the lock box assembly 10 includes a lock box shell 14 and a lock box body 12 disposed within the lock box shell 14. The lock box body 12 is typically made of metal to provide sufficient structural strength and rigidity for good fit with other components; while the lock box shell 14 is typically made of plastic to enclose the lock box body 12 for protection, preventing rust. In addition, the plastic lock box shell 14 also has a certain aesthetic and decorative function, making the combination lock box 100 look attractive and thus attracting consumers' attention.

[0094] Preferably, the combination lock box 100 further includes a protective shell 30 rotatably connected to the lock box assembly 10. The protective shell 30 can be pivotally connected to the bottom of the lock box assembly 10 at its own bottom. When the protective shell 30 is fastened to the lock box assembly 10, it can isolate the lock cylinder assembly 20 from external moisture, thereby improving the service life of the combination lock box 100.

[0095] Furthermore, preferably, to facilitate hanging the entire combination lock box 100 on the wall, a detachable hook 40 can be provided on the top of the lock box assembly 10. The user can install nails on the wall and then hang the hook 40 on the nails, thereby hanging the combination lock box 100 on the wall.

[0096] Alternatively, one can drill holes in the wall to install expansion bolts, then make through holes in the lock box assembly 10 at appropriate locations, and use self-tapping screws to drive through these through holes into the expansion bolts in the wall, thereby fixing the combination lock box 100 to the wall for use.

[0097] Those skilled in the art will understand that the steps, measures, and solutions in the various operations, methods, and processes discussed in this application can be alternated, modified, combined, or deleted. Furthermore, other steps, measures, and solutions in the various operations, methods, and processes discussed in this application can also be alternated, modified, rearranged, decomposed, combined, or deleted. Furthermore, steps, measures, and solutions in the prior art that are similar to those disclosed in this application can also be alternated, modified, rearranged, decomposed, combined, or deleted.

[0098] The above description is only a partial embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A combination lock box, comprising: A lock box assembly and a lock cylinder assembly rotatably fastened together with the lock box assembly, the lock cylinder assembly having a lock pin assembly, the lock pin assembly having a lock plate and a lock pin cooperating with the lock plate; characterized in that: a lock plate hole is formed on the lock plate hole, a curved lock groove is formed on the lock plate hole, the curved lock groove includes at least a first gradient section and a second gradient section connected to the first gradient section; the lock pin has a central pin, and a groove is formed on the circumferential surface of the central pin to slide and cooperate with the first gradient section and the second gradient section.

2. The combination lock box according to claim 1, characterized in that: The curved locking groove also includes a third gradient segment that connects with the second gradient segment.

3. The combination lock box according to claim 1, characterized in that: The locking pin assembly also includes a locking pin box with the locking plate disposed therein, a locking pin safety plate disposed on the locking plate, and a locking pin cover fixed to the locking pin box; the locking pin passes through the locking pin safety plate and the locking plate, and the locking pin elastically presses against the locking pin box and the locking pin cover.

4. The combination lock box according to claim 3, characterized in that: The central column has a pair of radially symmetrical and axially extending anti-rotation grooves; the locking pin safety plate has a locking pin opening for the locking pin to pass through, and a protrusion that can be inserted into the anti-rotation groove is formed in the locking pin opening; the protrusion is configured such that: when the locking pin safety plate is at a first height position, the protrusion disengages from the anti-rotation groove; when the locking pin safety plate is at a second height position lower than the first height position, the protrusion extends into the anti-rotation groove.

5. The combination lock box according to claim 4, characterized in that: The locking pin assembly also includes a reset pin, which has an arc-shaped rotating portion with a flat surface. One end of the rotating portion forms a drive pin, and a drive groove is formed on the end face of the drive pin. A drive hole is formed at the bottom of the locking pin safety plate. The arc-shaped rotating portion of the reset pin extends into the drive hole. The reset pin is configured such that: when the drive groove is rotated, the reset pin rotates; when the arc-shaped rotating portion contacts the bottom of the drive hole, the locking pin safety plate is at the second height position; when the drive groove continues to rotate, causing the drive groove to contact the bottom of the drive hole, the locking pin safety plate moves upward from the second height position to the first height position.

6. The combination lock box according to claim 5, characterized in that: The lock cylinder assembly also includes a button safety plate disposed at the bottom of the lock cylinder box, a panel disposed on the button safety plate, and a button elastically disposed between the panel and the bottom of the lock cylinder box; the lock cylinder protrudes from the bottom of the lock cylinder box, and the button maintains contact with the corresponding lock cylinder.

7. The combination lock box according to claim 6, characterized in that: The lock box assembly has a hook plate extending laterally outward from the top inner side of the lock box body; the top of the lock plate hooks onto the hook plate to lock the combination lock box; the top of the lock plate has a lifting hole with a top groove, a bottom groove, and an oblique groove communicating with both; the button safety plate has a button window corresponding to the button, and the bottom of the button safety plate forms a positioning tongue; the safety plate spring is elastically disposed between the positioning tongue and the panel; the lock cylinder assembly further includes a push button, which includes a push plate horizontally slidably disposed on the panel and an actuating pin extending from one end face of the push plate; the actuating pin passes through the panel and extends into the lifting hole.

8. The combination lock box according to claim 7, characterized in that: A limiting step is formed on the end face of the actuating column of the push button; an arc-shaped notch is opened at the top of the button safety plate; the lock cylinder assembly further includes a pressure plate, and a locking block is formed at the bottom of the pressure plate; a limiting groove is opened at the top of the lock column safety plate; the pressure plate passes through the actuating column and is installed on the end face of the push plate; the limiting step is configured to be locked in the limiting groove, and the locking block is configured to be locked in the arc-shaped notch.

9. The combination lock box according to claim 8, characterized in that: The device further includes a normally open and normally closed assembly, comprising an actuating block and a reset knob that slides obliquely with the actuating block. The actuating block includes a sliding frame and an elastic frame disposed on the sliding frame. A first slope is formed at the bottom of the sliding frame, and elastic plates are disposed on the left and right sides of the elastic frame. A second slope is formed on the reset knob that cooperates with the first slope. A pair of radially distributed inclined plates are formed on both sides of the circumference of the top of the central column. The actuating block is disposed on the side surface of the locking column safety plate near the locking column box, and the elastic plates abut against the inclined plates, thereby restricting the axial movement of the locking column.

10. The combination lock box according to claim 9, characterized in that: The lock box further includes a hook unlocking assembly for removing the hook from the top of the lock box body. The hook unlocking assembly is located on the inner side of the top of the lock box body and includes: a lower sliding seat with a lower hook hole and an upper sliding seat with an upper hook hole. The upper sliding seat and the lower sliding seat are engaged with each other. A pair of unlocking handles are slidably disposed laterally in the lower sliding seat, and the bottom ends of the pair of unlocking handles extend from the bottom of the lower sliding seat. Each unlocking handle has a latch at its top, and a transverse spring is disposed between the two latches. The ends of the two latches that are far apart from each other form an arc-shaped concave edge.

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