A high strength lock

Abstract

The utility model discloses a high strength lockset, including lock shell, mechanical lock core and lock pin. The lock shell has annular inner wall, and the annular inner wall forms the lock core cavity, and the mechanical lock core at least partially extends into the lock core cavity, and the lock pin has two position states of locking and unlocking, and forms transmission cooperation with the mechanical lock core. The inner cavity gap is formed between the mechanical lock core and the annular inner wall, and the gap is equipped with the reinforcing support. The utility model discloses a high strength reinforcing support is arranged in the gap, makes up the defect of the mechanical strength deficiency of plastic lock shell, effectively disperses the stress of lockset stress, avoids the deformation and the cracking of lock shell annular inner wall, and significantly improves the anti -impact, the anti -prying ability of lockset, and the reinforcing support is matched with the first positioning groove through the first positioning convex rib and the second positioning convex rib and the second positioning groove, realizes accurate positioning and firm connection with the lock shell, prevents displacement in use, guarantees the overall structure stability of lockset, and the guiding channel formed by the guide rib has the limiting guiding effect to the transmission rod, avoids transmission jam.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, specifically to a high-strength lock suitable for furniture, vehicles, security equipment and other scenarios, and particularly to a locking structure that combines a plastic lock shell with a metal / high-performance material reinforced bracket. Background Technology

[0002] As a commonly used security component, the structural strength of locks directly affects their safety and service life.

[0003] Referring to prior art 1, such as patent document CN111188537B, a lock cylinder, lock, and key are disclosed. The lock cylinder includes: a housing; a lock cylinder assembly, at least a portion of which is disposed inside the housing, having an axial hole for the key's unlocking section to pass through, and capable of rotating relative to the housing; a mechanical locking assembly, movably disposed between the housing and the lock cylinder assembly, having an unlocked position and a locked position; an electronic locking assembly, at least a portion of which is disposed inside the lock cylinder assembly, capable of locking and unlocking the mechanical locking assembly; and a locking assembly, disposed between the housing and the lock cylinder assembly, capable of locking and unlocking the electronic locking assembly.

[0004] Referring to prior art 2, such as patent document CN213980349U, an intelligent mechanical dual-verification lock cylinder and lock are disclosed. This intelligent mechanical dual-verification lock cylinder includes a mechanical lock cylinder and an electronic lock cylinder. The mechanical lock cylinder has a rotating column into which a key can be inserted, and pins or blades for engaging the lock body to achieve locking. The electronic lock cylinder has a motor and a cam located at the motor's output shaft. The rotating column has a cavity for accommodating the motor and the cam, and a through hole for accommodating a locking block that engages with the cam. When the protruding part of the cam presses against the locking block, the locking block engages the lock body. The key has an insertion part that can be inserted into the mechanical lock cylinder through the pins or blades to release the lock body from locking.

[0005] In summary, in existing technologies, to reduce production costs and weight, some locks use plastic to make the lock case. However, the mechanical strength of plastic is limited, especially at the mating point between the lock case and the mechanical lock cylinder: the inner wall of the lock case needs to form a cylinder cavity to accommodate the mechanical lock cylinder, inevitably resulting in an internal gap between the mechanical lock cylinder and the annular inner wall. When the lock is subjected to external impact, prying, or repeated locking and unlocking over a long period, this gap will cause the annular inner wall of the plastic lock case to bear uneven stress, making it prone to deformation and cracking. This can lead to the mechanical lock cylinder jamming, lock pin transmission failure, seriously affecting the locking reliability of the lock, and even causing damage to the lock.

[0006] Furthermore, existing lock transmission structures often suffer from insufficient assembly precision and poor guiding properties, leading to unsmooth locking / unlocking processes. Simultaneously, the unreasonable design of the positioning structure between the lock case and internal components makes them prone to displacement, further reducing the lock's stability and lifespan. Therefore, there is an urgent need for a high-strength lock that can compensate for the strength deficiencies of plastic lock cases while ensuring assembly precision and transmission stability. Summary of the Invention

[0007] To address the technical problems of insufficient strength, easy deformation, and poor transmission stability of existing plastic lock shells, this invention provides a high-strength lock with simple structure, convenient assembly, high strength, and stable locking. By setting a reinforcing bracket in the gap of the lock cylinder cavity, combined with a precise positioning structure and a stable transmission mechanism, the overall strength and service life of the lock are effectively improved.

[0008] The technical solution of this utility model to solve its technical problem is: a high-strength lock, comprising: Lock case; A mechanical lock cylinder, wherein the lock shell has an annular inner wall, the annular inner wall forming a lock cylinder cavity, and the mechanical lock cylinder extends at least partially into the lock cylinder cavity; The locking pin has at least a locked position and an unlocked position, and the mechanical lock cylinder and the locking pin form a transmission engagement. An inner cavity gap is formed between the mechanical lock core and the annular inner wall, and a reinforcing bracket is provided in the inner cavity gap.

[0009] Preferably, the reinforcing bracket is inverted U-shaped, so that a movable space is formed in the middle of the reinforcing bracket, and the mechanical lock cylinder has a locking plate that can extend into the movable space or retract into the mechanical lock cylinder.

[0010] In some preferred embodiments of this utility model, the bottom of the annular inner wall has a first flange, and the bottom of the reinforcing bracket abuts against the first flange.

[0011] Furthermore, a first positioning groove is provided in the first flange, and a first positioning rib is provided at the bottom of the reinforcing bracket, the first positioning rib being inserted into the first positioning groove.

[0012] In some preferred embodiments of this utility model, the annular inner wall is provided with a plurality of support columns protruding inward, and the side wall of the reinforcing bracket abuts against the support columns.

[0013] Furthermore, a second positioning groove is provided on the support column, and a second positioning rib is provided on the side wall of the reinforcing bracket, the second positioning rib being inserted into the second positioning groove.

[0014] In some preferred embodiments of this utility model, the locking pin is rotatably connected to the lock housing via a rotating shaft; When the locking pin is in the unlocked position, the locking pin retracts into the lock housing; When the locking pin is in the locked position, the locking pin extends at least partially outside the lock housing.

[0015] Furthermore, the mechanical lock cylinder forms a transmission engagement with the lock pin via a transmission rod; The transmission rod has a straight tooth section, and the locking pin has an annular tooth section, wherein the straight tooth section and the annular tooth section mesh with each other; The lock housing has several protruding guide ribs inside, forming a guide channel between the guide ribs, and the transmission rod is at least partially movably disposed in the guide channel.

[0016] More specifically, the lock housing has a clearance groove on its side wall, and when the lock pin is in the locked position, the lock pin is at least partially inserted into the clearance groove. The front end face of the lock housing is provided with a window slot, and the transmission rod has a locking mark and an unlocking mark. The window slot can be aligned with either the locking mark or the unlocking mark.

[0017] Optionally, the lock shell is made of plastic, and the reinforcing bracket is made of zinc alloy, aluminum alloy, copper alloy, titanium alloy, or PEEK.

[0018] The assembly process of this utility model is as follows: Insert the reinforcing bracket into the lock cylinder cavity of the lock case: align the first positioning rib at the bottom of the reinforcing bracket with the first positioning groove of the first flange and insert it, while aligning the second positioning ribs on both side walls with the second positioning grooves of the support columns and inserting them, until the bottom of the reinforcing bracket is completely against the first flange and the side walls are tightly against each support column. The mechanical lock cylinder is inserted from the front end of the lock case, with the lock plate of the mechanical lock cylinder facing the movable space of the reinforcing bracket, ensuring that the lock plate can enter the movable space when it extends, and that the mechanical lock cylinder fits against the inner wall of the reinforcing bracket. Insert the transmission rod into the guide channel of the lock housing, so that the straight tooth section of the transmission rod meshes with the ring tooth section of the lock pin. Then, rotate the lock pin to the preset shaft hole of the lock housing through the rotating shaft to ensure that the end of the lock pin enters the clearance groove when it retracts and there is no interference when it extends. Adjust the position of the transmission rod so that when the locking pin is in the locked position, the locking mark of the transmission rod is aligned with the window slot of the lock housing; when it is in the unlocked position, the unlocking mark is aligned with the window slot, thus completing the overall assembly.

[0019] The beneficial effects of this utility model are as follows: I. Significantly Improved Strength: By setting a high-strength reinforcing bracket in the gap between the mechanical lock cylinder and the inner wall of the lock shell, the defect of insufficient mechanical strength of the plastic lock shell is made up, effectively dispersing the stress when the lock is subjected to force, avoiding deformation and cracking of the annular inner wall of the lock shell, and improving the lock's impact resistance and pry resistance. II. Precise and Stable Assembly: The reinforced bracket achieves precise positioning and firm connection with the lock housing through the cooperation of the first positioning rib and the first positioning groove, and the second positioning rib and the second positioning groove, preventing the reinforced bracket from shifting during use and ensuring the overall structural stability of the lock; the guide channel formed by the guide rib plays a limiting and guiding role for the transmission rod, avoiding transmission jamming. 3. Reliable and smooth transmission: The straight tooth section of the transmission rod meshes with the ring tooth section of the locking pin, resulting in high transmission efficiency and strong stability; the clearance groove of the lock housing provides room for the locking pin to move, avoiding interference between the locking pin and the lock housing when locking, further ensuring smooth locking / unlocking actions. IV. Simple structure and strong adaptability: The overall structure does not require complex processing technology and the assembly of each component is convenient; the material selection of the reinforced bracket and lock shell is flexible, and the appropriate material can be selected according to the strength requirements and cost budget of different usage scenarios, making it widely applicable. 5. Long service life: The high-strength reinforced bracket reduces wear on the lock case and mechanical lock cylinder, and the stable design of the transmission structure reduces component wear, significantly extending the overall service life of the lock; the alignment design of the window slot and the marking improves ease of use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is an exploded view of this utility model.

[0022] Figure 3 This is a cross-sectional view of the present invention.

[0023] Figure 4 This is a schematic diagram showing the fit between the lock case and the reinforcing bracket.

[0024] Figure 5 This is a schematic diagram of the front face structure of the lock case.

[0025] Figure 6 This is a schematic diagram of the rear end face of the lock case.

[0026] Figure 7 This is a structural diagram of the reinforced support.

[0027] Figure 8 This is a schematic diagram comparing the unlocked and locked positions of the locking pin.

[0028] In the diagram: 1. Lock housing; 11. Annular inner wall; 111. First flange; 112. First positioning groove; 12. Lock cylinder cavity; 13. Inner cavity gap; 14. Support column; 141. Second positioning groove; 15. Guide rib; 16. Guide channel; 17. Clearance groove; 18. Window groove; 2. Mechanical lock cylinder; 21. Lock plate; 3. Locking pin; 3a. Locking position; 3b. Unlocking position; 31. Rotating shaft; 32. Annular tooth section; 4. Reinforcing bracket; 41. Movement space; 42. First positioning rib; 43. Second positioning rib; 5. Transmission rod; 51. Straight tooth section. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments are merely specific descriptions of the present invention, and their purpose is to enable those skilled in the art to better understand the technical solution of the present invention, and should not be regarded as limitations on the present invention.

[0030] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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 utility model.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example 1

[0032] Reference Figures 1 to 8A high-strength lock includes: a lock housing 1, providing installation space for internal components and capable of being mounted on various doors and cabinets; a mechanical lock cylinder 2, wherein the lock housing 1 has an annular inner wall 11 forming a lock cylinder cavity 12, and the mechanical lock cylinder 2 extends at least partially into the lock cylinder cavity 12; the mechanical lock cylinder 2 and the annular inner wall 11 form a coaxial fit to ensure radial stability during rotation; and a locking pin 3, having at least a locked position 3a and an unlocked position 3b, and the mechanical lock cylinder 2 and the locking pin 3 form a transmission fit. An inner cavity gap 13 is formed between the mechanical lock cylinder 2 and the annular inner wall 11, and a reinforcing bracket 4 is provided in the inner cavity gap 13. The shape of the reinforcing bracket 4 matches the gap contour of the annular inner wall 11, completely or partially filling the inner cavity gap 13, forming a rigid support layer between the lock cylinder and the lock housing 1, thus providing structural reinforcement.

[0033] The above content constitutes the basic structural scheme of this utility model, and its features include at least the following: 1. After the mechanical lock cylinder extends into the lock cylinder cavity 12, the radial constraint of the annular inner wall 11 and the axial limitation of the reinforcing bracket 4 prevent transmission failure caused by lock cylinder shaking. 2. The reinforcing bracket 4 simultaneously achieves dual structural reinforcement: firstly, radial reinforcement, filling the gap between the mechanical lock cylinder 2 and the lock shell 1, preventing deformation of the annular wall of the lock shell 1 under external force; secondly, axial bearing, dispersing the axial force generated when the mechanical lock cylinder 2 rotates, and preventing stress concentration and cracking at the edge of the lock cylinder cavity 12.

[0034] Optionally, the lock housing 1 is made of plastic, which offers advantages such as lightweight, high molding precision, and controllable cost. The reinforcing bracket 4 is made of zinc alloy, aluminum alloy, copper alloy, titanium alloy, or PEEK, giving it significantly higher structural strength than the lock housing 1 itself. Simultaneously, the reinforcing bracket 4 acts on the lock housing 1, improving the overall strength of the lock, thus addressing the insufficient strength of plastic while avoiding the weight and cost disadvantages of an all-metal lock housing 1.

[0035] Preferably, refer to Figure 7 The reinforcing bracket 4 is inverted U-shaped, with an outline structure of "opening + bottom + two side walls," creating a movable space 41 in the middle. The mechanical lock cylinder 2 contains a locking plate 21, which can extend into the movable space 41 or retract into the mechanical lock cylinder 2. When extended, the locking plate 21 can fully enter the movable space 41; when retracted, it maintains a safe gap with the inner wall of the bracket, solving the problem of incompatibility of locking plate 21 movement in traditional structures. On the other hand, the U-shaped reinforcing bracket 4 remains tightly fitted to the annular inner wall 11 of the lock housing 1, ensuring that the radial support strength is not weakened and improving the structural integration.

[0036] Reference Figure 8In some optional structural configurations, the locking pin 3 is rotatably connected to the lock housing 1 via a pivot 31. When the locking pin 3 is in the unlocked position 3b, the locking pin 3 retracts into the lock housing 1. At this time, the locking pin 3 does not interfere with the external structure to be locked (such as a latch, a slot, etc.), and the locking constraint on the target component is achieved through the retracted state. When the locking pin 3 is in the locked position 3a, the locking pin 3 extends at least partially out of the lock housing 1. The extended part can contact or engage with the external unlocking structure (such as an unlocking push rod, a limiting groove, etc.), and the constraint on the target component is released through the extension action, thus completing the unlocking.

[0037] Furthermore, referring to Figures 2-3 The mechanical lock cylinder 2 is connected to the locking pin 3 via a transmission rod 5. The transmission rod 5 has a straight tooth section 51, and the locking pin 3 has a ring tooth section 32. The straight tooth section 51 and the ring tooth section 32 mesh with each other. Several guide ribs 15 are protruding inside the lock housing 1, forming a guide channel 16 between the guide ribs 15. The transmission rod 5 is at least partially movably disposed in the guide channel 16. First, the rotational motion of the mechanical lock cylinder 2 is converted into the linear motion of the transmission rod 5, and then the linear motion of the transmission rod 5 is converted into the rotational motion of the locking pin 3. This achieves efficient driving of the locking pin 3 by the mechanical lock cylinder 2, and ensures the stability and reliability of the transmission through the guide ribs 15. It is suitable for lock systems with high requirements for transmission accuracy and structural durability.

[0038] More specifically, refer to Figure 6 , Figure 8 The lock housing 1 has a clearance groove 17 on its side wall. When the locking pin 3 is in the locked position 3a, the locking pin 3 is at least partially inserted into the clearance groove 17. The front end face of the lock housing 1 has a window groove 18. The transmission rod 5 has a locking mark and an unlocking mark. The window groove 18 can be aligned with either the locking mark or the unlocking mark. The depth and width of the clearance groove 17 need to be precisely matched with the size of the part of the locking pin 3 that enters. This provides space for the retraction of the locking pin 3, avoiding rigid collision or interference between the locking pin 3 and the side wall of the lock housing 1, ensuring smooth locking action. It also provides auxiliary limiting for the locking pin 3 through the edge of the clearance groove 17, preventing the locking pin 3 from deviating from the locked position due to excessive rotation caused by vibration or other factors, further ensuring the stability of the locking state. Example 2

[0039] Reference Figures 3-5 In this embodiment, a preferred installation and positioning structure scheme for the reinforcing bracket 4 is provided, as follows: First positioning structure: The bottom of the annular inner wall 11 has a first flange 111, and the bottom of the reinforcing bracket 4 abuts against the first flange 111. The first flange 111 provides precise axial positioning for the reinforcing bracket 4, providing effective positioning for component installation. At the same time, the bottom of the reinforcing bracket 4 completely abuts against the top surface of the flange, eliminating the risk of axial movement of the bracket. Further, a first positioning groove 112 is formed in the first flange 111, and the bottom of the reinforcing bracket 4 has a first positioning rib 42. The first positioning rib 42 is inserted into the first positioning groove 112, thereby limiting the axial displacement of the reinforcing bracket 4 relative to the annular inner wall 11, forming a reliable positioning fit.

[0040] The second positioning structure: A plurality of support columns 14 protrude inward from the annular inner wall 11, and the sidewall of the reinforcing bracket 4 abuts against the support columns 14. The support columns 14 are arranged at intervals along the circumference (or axial direction, supplemented according to the distribution direction) of the annular inner wall 11, forming a lateral support structure. During assembly, the outer sidewall of the reinforcing bracket 4 abuts against the support columns 14 or their sides, providing lateral support to the reinforcing bracket 4 through the support columns 14, preventing radial swaying of the reinforcing bracket 4 within the annular inner wall 11, and enhancing the overall structure's resistance to deformation. Furthermore, a second positioning groove 141 is provided on the support column 14, and a second positioning rib 43 protrudes from the sidewall of the reinforcing bracket 4. The second positioning rib 43 is inserted into the second positioning groove 141, thereby limiting the circumferential displacement of the reinforcing bracket 4 relative to the annular inner wall 11, forming a reliable positioning fit.

[0041] It should be emphasized that the first positioning rib 42 (axial) and the second positioning rib 43 (circumferential) are set in perpendicular directions to each other, forming a more comprehensive constraint system, which not only plays a synergistic role of bottom support and lateral support, but also plays a synergistic role of axial positioning and circumferential positioning.

[0042] The working principle of this utility model is as follows: Unlocking process: Insert the matching key into the mechanical lock cylinder 2 and turn it. The lock plate 21 inside the mechanical lock cylinder 2 retracts into the mechanical lock cylinder 2. At the same time, the mechanical lock cylinder 2 drives the transmission rod 5 to move along the guide channel 16. The transmission rod 5 engages with the annular tooth section 32 of the lock pin 3 through the straight tooth section 51, driving the lock pin 3 to rotate around the rotating shaft 31 and extend out of the lock housing 1 from the clearance groove 17. At this time, the unlocking mark of the transmission rod 5 is aligned with the window groove 18, and the lock is in the unlocked state.

[0043] Locking process: Turn the key in the opposite direction, the mechanical lock cylinder 2 drives the transmission rod 5 to move in the opposite direction, the lock pin 3 rotates in the opposite direction under the action of meshing transmission, retracts into the lock case 1 and the end enters the relief groove 17, the lock plate 21 extends into the movable space 41 of the reinforcing bracket 4 (restricting the rotation of the mechanical lock cylinder 2), at this time the locking mark of the transmission rod 5 is aligned with the window groove 18, and the lock is in the locked state.

[0044] Throughout the entire process, the reinforced bracket 4 withstands the stress transmitted by the mechanical lock cylinder 2 and external impacts, and maintains a stable position through the first and second positioning structures, effectively protecting the annular inner wall 11 of the lock shell 1 from deformation and ensuring smooth transmission of each component.

[0045] It is worth noting that the other technical solutions of this utility model are all existing technologies, and therefore will not be described in detail.

[0046] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the concept of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A high-strength lock, comprising: Lock case (1); Mechanical lock cylinder (2), the lock shell (1) has an annular inner wall (11), the annular inner wall (11) forms a lock cylinder cavity (12), and the mechanical lock cylinder (2) extends at least partially into the lock cylinder cavity (12); The locking pin (3) has at least a locked position state (3a) and an unlocked position state (3b), and the mechanical lock cylinder (2) and the locking pin (3) form a transmission engagement; Its features are: An inner cavity gap (13) is formed between the mechanical lock core (2) and the annular inner wall (11), and a reinforcing bracket (4) is provided in the inner cavity gap (13).

2. The high-strength lock according to claim 1, characterized in that: The reinforcing bracket (4) is inverted U-shaped so that a movable space (41) is formed in the middle of the reinforcing bracket (4). The mechanical lock cylinder (2) has a locking plate (21) which can extend into the movable space (41) or retract into the mechanical lock cylinder (2).

3. The high-strength lock according to claim 1, characterized in that: The bottom of the annular inner wall (11) has a first flange (111), and the bottom of the reinforcing bracket (4) abuts against the first flange (111).

4. The high-strength lock according to claim 3, characterized in that: The first flange (111) has a first positioning groove (112), and the bottom of the reinforcing bracket (4) has a first positioning rib (42), which is inserted into the first positioning groove (112).

5. The high-strength lock according to claim 1, characterized in that: The annular inner wall (11) is provided with a plurality of support columns (14) protruding inward, and the side wall of the reinforcing bracket (4) abuts against the support columns (14).

6. The high-strength lock according to claim 5, characterized in that: The support column (14) is provided with a second positioning groove (141), and the side wall of the reinforcing bracket (4) is provided with a second positioning rib (43), which is inserted into the second positioning groove (141).

7. The high-strength lock according to claim 1, characterized in that: The locking pin (3) is rotatably connected to the lock housing (1) via a rotating shaft (31); When the locking pin (3) is in the unlocked position (3b), the locking pin (3) retracts into the lock housing (1); When the locking pin (3) is in the locked position (3a), the locking pin (3) extends at least partially out of the lock housing (1).

8. The high-strength lock according to claim 7, characterized in that: The mechanical lock cylinder (2) is connected to the lock pin (3) via a transmission rod (5); The transmission rod (5) has a straight tooth section (51), and the locking pin (3) has an annular tooth section (32). The straight tooth section (51) and the annular tooth section (32) mesh with each other. The lock housing (1) has several guide ribs (15) protruding inside, and a guide channel (16) is formed between the guide ribs (15). The transmission rod (5) is at least partially movably disposed in the guide channel (16).

9. The high-strength lock according to claim 8, characterized in that: The lock housing (1) has a clearance groove (17) on its side wall. When the locking pin (3) is in the locked position (3a), the locking pin (3) is at least partially inserted into the clearance groove (17). The front end face of the lock housing (1) is provided with a window slot (18), and the transmission rod (5) has a locking mark and an unlocking mark. The window slot (18) can be aligned with either the locking mark or the unlocking mark.

10. The high-strength lock according to any one of claims 1-9, characterized in that: The lock shell (1) is made of plastic, and the reinforcing bracket (4) is made of zinc alloy, aluminum alloy, copper alloy, titanium alloy, or PEEK.

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