Door lock

Abstract

The embodiment of the utility model provides a door lock, which comprises a first lock box, a second lock box and a second lock box, wherein the first lock box comprises a first lock shell, and the first lock shell is provided with a first center hole; the second lock box comprises a second lock shell, the second lock shell is provided with a second center hole, and the first lock box and the second lock box are clamped on the two side faces of the door plate. The knob is rotatably positioned in the second lock box; the lock cylinder structure comprises a lock cylinder barrel and a linkage shaft, and the linkage shaft comprises an inner shaft and an outer shaft; the lock cylinder barrel penetrates into the first center hole and is rotatably located in the first lock box. The outer shaft is connected with the knob; the other end of the inner shaft is inserted into the outer shaft; the spring bolt structure is located in the second lock box in a sliding mode. The lock cylinder barrel and the knob are linked through the linkage shaft, and under the condition that the lock cylinder barrel or the knob rotates, the lock cylinder barrel and the knob rotate together with the spring bolt structure and control the spring bolt structure to enter and exit at the preset position. According to the technical scheme, the door lock can be used more easily and conveniently.

Description

Technical Field

[0001] The present application relates to the technical field of locks, and in particular to a door lock. Background Art

[0002] Locks have been used for thousands of years. Despite the continuous advancement of technology and the continuous updating of locks, traditional mechanical locks are still widely used due to their reliability and safety. In existing double-sided locks, the internal and external mechanisms are not linked to each other. The key on the outside can only operate the outer lock cylinder, while the knob on the inside can only operate the inner lock cylinder. Users need to operate on the outside and inside separately, which increases the complexity and inconvenience of use.

[0003] It should be noted that the above content is not necessarily prior art, nor is it intended to limit the scope of patent protection of this application. Utility Model Content

[0004] The embodiments of the present application provide a door lock to solve or alleviate one or more of the technical problems mentioned above.

[0005] As one aspect of an embodiment of the present application, an embodiment of the present application provides a door lock, including:

[0006] A first lock box, comprising a first lock shell, wherein the first lock shell is provided with a first central hole;

[0007] A second lock box, comprising a second lock shell, wherein the second lock shell is provided with a second central hole, and the first lock box and the second lock box are supported on two sides of the door panel;

[0008] A knob is rotatably located in the second lock box; the end of the knob extends into the second center hole, and the rotation control end of the knob is located outside the second lock box;

[0009] The lock core structure comprises a lock core barrel and a linkage shaft, wherein the linkage shaft comprises an inner shaft and an outer shaft; the lock core barrel penetrates the first central hole and is rotatably located in the first lock box; the outer shaft is connected to the knob; one end of the inner shaft is inserted into the lock core barrel, and the other end is inserted into the outer shaft;

[0010] a locking tongue structure, the locking tongue structure being slidably located in the second lock box;

[0011] The linkage shaft links the lock cylinder and the knob, and when the lock cylinder or the knob rotates, the two rotate together with the lock tongue structure and control the entry and exit of the lock tongue structure at a preset position.

[0012] Optionally, the first lock box is provided with a first fixing block, the first fixing block is located in the first center hole, and the lock cylinder is positioned in the first center hole;

[0013] A key slot is provided in the axial direction of the lock core cylinder, and a lock pin is provided inside the key slot;

[0014] When the key is inserted into the lock cylinder, the tooth shape of the key pushes the lock pin, so that the dividing line of the lock pin is aligned on the shear line, causing the lock cylinder to rotate.

[0015] Optionally, the outer shaft is provided with a first spring, an open groove, an annular groove and a retaining spring; wherein:

[0016] The first spring abuts between the bottom of the outer shaft and the inner shaft;

[0017] The opening groove is arranged on the side wall of the outer shaft, and the notch of the opening groove faces the lock cylinder;

[0018] The annular groove is arranged on the outer wall of the outer shaft, and the annular groove is located at one end of the outer shaft close to the lock cylinder;

[0019] The clamping ring is arranged in the annular groove to block the notch of the opening groove;

[0020] Correspondingly, a limit pin is provided at one end of the inner shaft close to the knob, and the inner shaft is also provided with a groove for inserting a key;

[0021] The limit pin is matched with the opening slot, the limit pin can slide in the opening slot, and the maximum stroke is limited by the retaining spring.

[0022] Optionally, the second lock box is provided with a second fixing block, the second fixing block is located in the second center hole, and the end of the knob is positioned in the second center hole;

[0023] A first protrusion is provided on a side of the second fixing block close to the first lock box, and a second protrusion is provided on a circumferential surface of the end of the knob;

[0024] When the knob is rotated by a certain angle, the first protrusion resists the rotation of the second protrusion to limit further rotation of the knob.

[0025] Optionally, the lock tongue structure includes a lock tongue connecting portion and a circular lock tongue;

[0026] One end of the locking tongue connecting portion is fixed to the end of the knob;

[0027] The shape of the circular lock tongue is a semicircular ring, and the circular lock tongue is fixedly connected to the other end of the lock tongue connecting part;

[0028] The locking tongue connecting portion rotates with the knob and drives the annular locking tongue to rotate, so that the end of the annular locking tongue enters and exits the second lock box.

[0029] Optionally, the second lock box further comprises a second lock cover, and the second lock cover is provided with a positioning hole;

[0030] The annular lock tongue is provided with a blind hole, the blind hole faces the first lock cover; the blind hole is provided with a second spring and a round ball, the second spring is located at the bottom of the blind hole, and the round ball is located above the spring and partially extends out of the blind hole;

[0031] Wherein, the positioning hole is relative to the sliding path of the circular lock tongue, and when the circular lock tongue is rotated to a locked or unlocked position, the ball is embedded in the positioning hole.

[0032] Optionally, the second locking cover is further provided with a second through hole;

[0033] Wherein, the outer shaft passes through the second through hole.

[0034] Optionally, the first lock box further comprises a first lock cover, and the first lock cover is provided with a first through hole;

[0035] Wherein, the lock core tube passes through the first through hole.

[0036] Optionally, the first lock box and the second lock box are both semicircular in shape, and the first lock box and the second lock box are symmetrically distributed.

[0037] Optionally, the first lock box and the second lock box are both made of metal material.

[0038] The above technical solution adopted in the embodiment of the present application may have the following advantages:

[0039] The lock cylinder and the knob are linked together by the linkage shaft. When the lock cylinder or the knob rotates, the two rotate together with the lock tongue structure and control the entry and exit of the lock tongue structure at a preset position, thereby realizing the linkage between the first lock box and the second lock box, thereby making the door lock structure simpler and more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0041] Figure 1 It is a schematic diagram of the structure of the door lock provided in an embodiment of the present application.

[0042] Figure 2 It is a schematic diagram of the structure of the first lock box provided in an embodiment of the present application.

[0043] Figure 3 It is an exploded view of the first lock box provided in the embodiment of the present application.

[0044] Figure 4 It is a schematic diagram of the structure of the second lock box provided in an embodiment of the present application.

[0045] Figure 5 It is an exploded view of the lock tongue structure provided in the embodiment of the present application.

[0046] Figure 6 It is a schematic diagram of the structure of the linkage shaft provided in an embodiment of the present application.

[0047] Description of reference numerals:

[0048] 1. First lock box; 11. First lock shell; 111. First center hole; 12. First fixing block; 13. First lock cover; 131. First through hole; 2. Second lock box; 21. Second lock shell; 211. Second center hole; 22. Second fixing block; 221. First convex block; 23. Second lock cover; 231. Positioning hole; 232. Second through hole; 3. Knob; 31. Second convex block; 4. Lock core structure; 41. Lock core barrel; 411. Key slot; 42. Linkage shaft; 421. Inner shaft; 4211. Limit pin; 4212. Groove; 422. Outer shaft; 4221. First spring; 4222. Open groove; 4223. Annular groove; 4224. Retaining spring; 5. Lock tongue structure; 51. Ring lock tongue; 511. Blind hole; 512. Second spring; 513. Round ball; 52. Lock tongue connecting part. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present application more clear, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0050] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0051] The embodiment of the present application provides a technical solution for a door lock. The lock cylinder and the knob are linked by the linkage shaft. When the lock cylinder or the knob rotates, the two rotate together with the lock tongue structure and control the in and out of the lock tongue structure at a preset position, thereby realizing the linkage between the first lock box and the second lock box. The first lock box can unlock the second lock box, and the second lock box can unlock the first lock box, thereby making the door lock structure simpler and more convenient to use. See below for details.

[0052] Hereinafter, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. It should be noted that these exemplary embodiments can be implemented in many different forms and should not be construed as being limited to the embodiments described herein.

[0053] like Figures 1 to 6 As shown, the door lock may include: a first lock box 1 , a second lock box 2 , a knob 3 , a lock core structure 4 and a lock tongue structure 5 .

[0054] The first lock box 1 comprises a first lock shell 11, and the first lock shell 11 is provided with a first central hole 111. The bottom of the first lock shell 11 is semicircular, or other shapes; the first central hole 111 is rectangular, or other shapes.

[0055] The second lock box 2 includes a second lock shell 21, and the second lock shell 21 is provided with a second central hole 211. The first lock box 1 and the second lock box 2 are attached to the two sides of the door panel. The first lock shell 11 and the second lock shell 21 have the same structure. The first lock box 1 and the second lock box 2 are fixed on both sides of the door panel, and the first lock box 1 can be installed on the inner side of the door panel, and the second lock box 2 can be installed on the inner side of the door panel.

[0056] The knob 3 is rotatably located in the second lock box 2. The end of the knob 3 extends into the second center hole 211, and the rotation control end of the knob 3 is located outside the second lock box 2. The knob 3 is a T-shaped knob, the control part of the knob 3 is located outside the second lock box 2, and the cylindrical connection part of the knob 3 is deeply inserted into the second center hole 211. The knob 3 can be made of nylon material.

[0057] The lock core structure 4 includes a lock core barrel 41 and a linkage shaft 42, and the linkage shaft 42 includes an inner shaft 421 and an outer shaft 422; the lock core barrel 41 penetrates the first central hole 111 and is rotatably located in the first lock box 1; the outer shaft 422 is connected to the knob 3; one end of the inner shaft 421 is inserted into the lock core barrel 41, and the other end is inserted into the outer shaft 422. The lock core barrel 41 of the lock core structure 4 extends into the first lock box, and the linkage shaft 42 of the lock core structure 4 extends into the second lock box 2. The first lock box 1 and the second lock box 2 provide support and partial accommodation space for the lock core structure 4. The lock core structure 4 can be made of brass.

[0058] The locking tongue structure 5 is slidably located in the second lock box 2. The locking tongue structure 5 is fixed to the end of the knob 3.

[0059] Among them, the linkage shaft 42 links the lock cylinder 41 and the knob 3. When the lock cylinder 41 or the knob 3 rotates, the two rotate together with the lock tongue structure 5 and control the entry and exit of the lock tongue structure 5 at a preset position. The linkage shaft 42 is connected to the knob 3 and links with the lock cylinder 41 to form an integral linkage relationship. When the key is inserted into the lock cylinder 41 and rotated, the lock cylinder 41 will drive the linkage shaft 42 to rotate and then drive the knob 3 to rotate. When the knob 3 is rotated, the knob 3 transmits the rotation action to the lock cylinder 41 through the linkage shaft 42. When the lock cylinder structure 4 rotates to the preset position, the lock tongue structure 5 will extend or retract in the second lock box 2 to complete the locking or unlocking operation of the door.

[0060] In this embodiment, the lock cylinder 41 and the knob 3 are linked together by the linkage shaft 42. When the lock cylinder 41 or the knob 3 rotates, the two rotate together with the lock tongue structure 5 and control the entry and exit of the lock tongue structure 5 at a preset position, thereby realizing the linkage between the first lock box 1 and the second lock box 2, thereby making the door lock structure simpler and more convenient to use.

[0061] In an optional embodiment, the first lock box 1 is provided with a first fixing block 12, which is located in the first center hole 111 and positions the lock cylinder 41 in the first center hole 111. The first fixing block 12 is used to limit the lock cylinder 41, which can further improve the stability during use and prevent the lock cylinder 41 from shaking or falling off.

[0062] A key slot 411 is provided in the axial direction of the lock cylinder 41, and a lock pin is provided inside the key slot 411. A plurality of lock pins are installed inside the key slot 411, and these lock pins prevent the lock cylinder 41 from rotating when no key is inserted.

[0063] When the key is inserted into the lock cylinder 41, its tooth shape pushes the lock pin, so that the dividing line of the lock pin is aligned on the shear line, and the lock cylinder 41 rotates. After the lock pin is aligned, when the key drives the lock cylinder 41 to rotate, the linkage shaft 42 drives the lock tongue structure 5 to complete the opening and closing operation of the door lock.

[0064] In this embodiment, the design of the first lock box 1 and the first fixing block 12 can stably and accurately install the lock cylinder 41 in the first lock box 1. The key slot 411 guides the key to be inserted, and only a matching key can push the lock pin to the correct position, which can improve the safety of the door lock.

[0065] In an optional embodiment, the outer shaft 422 is provided with a first spring 4221, an opening groove 4222, an annular groove 4223 and a retaining spring 4224; wherein:

[0066] The first spring 4221 abuts against the bottom of the outer shaft 422 and between the inner shaft 421. The first spring 4221 is installed between the bottom of the outer shaft 422 and the inner shaft 421 to provide elastic force to adapt to door panels of different thicknesses.

[0067] The opening groove 4222 is arranged on the side wall of the outer shaft 422, and the notch of the opening groove 4222 faces the lock cylinder 41. The opening groove 4222 is used to provide a sliding path for the limiting pin 4211 of the inner shaft 421.

[0068] The annular groove 4223 is provided on the outer wall of the outer shaft 422, and the annular groove 4223 is located at one end of the outer shaft 422 close to the lock cylinder 41. The annular groove 4223 provides a fixed position for installing a retaining ring 4224 to limit the sliding range of the inner shaft 421.

[0069] The clamping spring 4224 is disposed in the annular groove 4223 to block the notch of the opening groove 4222. The clamping spring 4224 can prevent the limiting pin 4211 of the inner shaft 421 from exceeding a predetermined sliding range.

[0070] Correspondingly, a stop pin 4211 is provided at one end of the inner shaft 421 close to the knob 3, and the inner shaft 421 is also provided with a groove 4212 for inserting a key. After the key is inserted into the groove 4212, the sliding and rotation of the inner shaft 421 can be directly controlled, further driving the operation of the outer shaft 422 and the lock cylinder 41.

[0071] The limiting pin 4211 is matched with the opening slot 4222, and the limiting pin 4211 can slide in the opening slot 4222, and the maximum stroke is limited by the clamping spring 4224. The limiting pin 4211 is matched with the opening slot 4222 to achieve a better limiting effect.

[0072] In this embodiment, the design of the opening groove 4222 and the limit pin 4211 allows the inner shaft 421 to slide in the outer shaft 422, but its travel is limited by the retaining spring 4224, thereby preventing the inner shaft from moving excessively and improving the safety of the door lock. The combined design of the annular groove 4223 and the retaining spring 4224 can improve the stability of the inner and outer shafts and achieve control of their relative motion range, thereby improving the safety and reliability of the entire lock.

[0073] In an optional embodiment, the second lock box 2 is provided with a second fixing block 22, which is located in the second center hole 211 and positions the end of the knob 3 in the second center hole 211. The second fixing block 22 provides support for the knob 3. The second fixing block 22 limits the end of the knob 3 in the second center hole 211 by fastening or snapping.

[0074] A first protrusion 221 is provided on one side of the second fixing block 22 close to the first lock box 1, and a second protrusion 31 is provided on the circumferential surface of the end of the knob 3. The first protrusion 221 interacts with the second protrusion 31 at the end of the knob 3 to form a limiting structure.

[0075] When the knob 3 rotates to a certain angle, the first protrusion 221 resists the rotation of the second protrusion 31, thereby limiting further rotation of the knob 3. The mutual resistance between the first protrusion 221 and the second protrusion 31 limits the maximum rotation angle of the knob 3, preventing the knob 3 from exceeding the preset operating range.

[0076] In this embodiment, the cooperation between the first protrusion 221 and the second protrusion 31 forms a mechanical limit structure to limit the rotation angle of the knob 3. The limit structure prevents excessive rotation of the knob 3 and avoids malfunction or damage of the lock due to excessive operation.

[0077] In an optional embodiment, the locking tongue structure 5 includes a locking tongue connecting portion 52 and a circular locking tongue 51 .

[0078] One end of the bolt connection part 52 is fixed to the end of the knob 3. This connection mode can directly transmit the rotation of the knob 3 to the bolt connection part 52, so that it rotates synchronously.

[0079] The shape of the circular ring lock tongue 51 is a semicircular ring, and the circular ring lock tongue 51 is fixedly connected to the other end of the lock tongue connecting portion 52 .

[0080] The lock tongue connection part 52 rotates with the knob 3 and drives the ring lock tongue 51 to rotate, so that the end of the ring lock tongue 51 enters and exits the second lock box 2. When the knob 3 rotates, the lock tongue connection part 52 rotates synchronously, and realizes the rotation of the ring lock tongue 51 through the ring lock tongue 51 connected to its other end.

[0081] In this embodiment, the lock tongue connecting portion 52 directly connects the knob 3 and the annular lock tongue 51, so that the rotation of the knob 3 can be effectively transmitted to the lock tongue structure, thereby simplifying the structure and improving the transmission efficiency.

[0082] In an optional embodiment, the second lock box 2 further includes a second lock cover 23, and the second lock cover 23 is provided with a positioning hole 231. The second lock cover 23 is adapted to the second lock shell 22, and the second lock cover 23 is covered on the second lock shell 22.

[0083] The annular lock tongue 51 is provided with a blind hole 511, and the blind hole 511 faces the second lock cover 23. The blind hole 511 is a circular hole, which is used to accommodate the second spring 511 and the ball 512. The blind hole 511 is provided with a second spring 512 and a ball 513, the second spring 512 is located at the bottom of the blind hole 511, and the ball 513 is located above the spring and partially extends out of the blind hole 511. The function of the second spring 512 is to push the ball 513 upward and partially out of the blind hole 511, so that the ball 513 can cooperate with the positioning hole 231.

[0084] The positioning hole 231 is relative to the sliding path of the ring lock tongue 51, and when the ring lock tongue 51 rotates to the locking or unlocking position, the ball 513 is embedded in the positioning hole 231. When the ring lock tongue 51 rotates to the predetermined locking or unlocking position, the ball 513 is pushed by the second spring 512 and embedded in the positioning hole 231.

[0085] In this embodiment, the positioning hole 231 and the ball 513 are embedded to prevent the ring lock tongue 51 from loosening or shifting when locked or unlocked, thereby enhancing the stability of the lock. The user can also obtain clear feedback when operating the knob 3, knowing that the lock tongue structure 5 has reached the specified position.

[0086] In an optional embodiment, the second locking cover 23 is further provided with a second through hole 232. The second through hole is reserved for the outer shaft 422. The outer shaft 422 passes through the second through hole 232.

[0087] In an optional embodiment, the first lock box 1 further includes a first lock cover 13, and the first lock cover 13 is provided with a first through hole 131. The first lock cover 13 is adapted to the first lock housing 12, and the first through hole 131 is reserved for the lock cylinder 41. The lock cylinder 41 passes through the first through hole 131.

[0088] In an optional embodiment, the first lock box 1 and the second lock box 2 are both semicircular in shape, and the first lock box 1 is symmetrically distributed with the second lock box 2. The first lock box 1 and the second lock box 2 are installed on both sides of the door and are symmetrically distributed.

[0089] In an optional embodiment, the first lock box 1 and the second lock box 2 are both made of metal materials. The first lock box 1 and the second lock box 2 can also be made of other materials according to actual conditions.

[0090] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0091] For the convenience of description, the orientation or position relationship indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, vertical, horizontal" and "top, bottom" is usually based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these directional words 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, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Therefore, the exemplary term "above..." can include both "above..." and "below..." orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here are interpreted accordingly.

[0092] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0093] Unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is lower in level than the second feature.

[0094] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0095] It should also be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of this application.

[0096] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0097] It should also be noted that the above are only preferred embodiments of the present application, and the patent protection scope of the present application is not limited thereto. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A door lock, characterized in that: include: A first lock box (1) comprises a first lock shell (11), wherein the first lock shell (11) is provided with a first central hole (111); A second lock box (2), comprising a second lock shell (21), wherein the second lock shell (21) is provided with a second central hole (211), and the first lock box (1) and the second lock box (2) are supported on two side surfaces of the door panel; A knob (3) is rotatably located in the second lock box (2); the end of the knob (3) extends into the second center hole (211), and the rotation control end of the knob (3) is located outside the second lock box (2); A lock core structure (4), comprising a lock core barrel (41) and a linkage shaft (42), wherein the linkage shaft (42) comprises an inner shaft (421) and an outer shaft (422); the lock core barrel (41) penetrates the first central hole (111) and is rotatably located in the first lock box (1); the outer shaft (422) is connected to the knob (3); one end of the inner shaft (421) is inserted into the lock core barrel (41), and the other end is inserted into the outer shaft (422); A locking tongue structure (5), wherein the locking tongue structure (5) is slidably located in the second lock box (2); The linkage shaft (42) links the lock cylinder (41) and the knob (3), and when the lock cylinder (41) or the knob (3) rotates, the two rotate together with the lock tongue structure (5) and control the entry and exit of the lock tongue structure (5) at a preset position.

2. The door lock according to claim 1, characterized in that: The first lock box (1) is provided with a first fixing block (12), the first fixing block (12) is located in the first center hole (111), and the lock cylinder (41) is positioned in the first center hole (111); The lock core barrel (41) is provided with a key slot (411) in the axial direction, and a lock pin is provided inside the key slot (411); When the key is inserted into the lock cylinder (41), the tooth shape thereof pushes the lock pin, so that the dividing line of the lock pin is aligned on the shear line, causing the lock cylinder (41) to rotate.

3. The door lock according to claim 1, characterized in that: The outer shaft (422) is provided with a first spring (4221), an opening groove (4222), an annular groove (4223) and a retaining spring (4224); wherein: The first spring (4221) abuts against the bottom of the outer shaft (422) and between the inner shaft (421); The opening groove (4222) is arranged on the side wall of the outer shaft (422), and the notch of the opening groove (4222) faces the lock cylinder (41); The annular groove (4223) is arranged on the outer wall of the outer shaft (422), and the annular groove (4223) is located at one end of the outer shaft (422) close to the lock cylinder (41); The clamping ring (4224) is arranged in the annular groove (4223) to seal the notch of the opening groove (4222); Correspondingly, a stop pin (4211) is provided at one end of the inner shaft (421) close to the knob (3), and the inner shaft (421) is also provided with a groove (4212) for inserting a key; The limit pin (4211) is matched with the opening slot (4222), the limit pin (4211) is slidable in the opening slot (4222), and the maximum stroke is limited by the retaining spring (4224).

4. The door lock according to claim 1, characterized in that: The second lock box (2) is provided with a second fixing block (22), the second fixing block (22) is located in the second center hole (211), and the end of the knob (3) is positioned in the second center hole (211); A first protrusion (221) is provided on a side of the second fixing block (22) close to the first lock box (1), and a second protrusion (31) is provided on a circumferential surface of the end of the knob (3); When the knob (3) is rotated by a certain angle, the first protrusion (221) resists the rotation of the second protrusion (31) to limit further rotation of the knob (3).

5. The door lock according to claim 1, characterized in that: The locking tongue structure (5) comprises a locking tongue connecting portion (52) and a circular locking tongue (51); One end of the locking tongue connecting portion (52) is fixed to the end of the knob (3); The shape of the circular lock tongue (51) is a semicircular ring, and the circular lock tongue (51) is fixedly connected to the other end of the lock tongue connecting part (52); The locking tongue connecting portion (52) rotates with the knob (3) and drives the annular locking tongue (51) to rotate, so that the end of the annular locking tongue (51) enters and exits the second lock box (2).

6. The door lock according to claim 5, characterized in that: The second lock box (2) further comprises a second lock cover (23), and the second lock cover (23) is provided with a positioning hole (231); The annular lock tongue (51) is provided with a blind hole (511), and the blind hole (511) faces the second lock cover (23); the blind hole (511) is provided with a second spring (512) and a round ball (513), the second spring (512) is located at the bottom of the blind hole (511), and the round ball (513) is located above the spring and partially extends out of the blind hole (511); The positioning hole (231) is located relative to the sliding path of the circular locking tongue (51), and when the circular locking tongue (51) is rotated to a locked or unlocked position, the ball (513) is embedded in the positioning hole (231).

7. The door lock according to claim 6, characterized in that: The second locking cover (23) is also provided with a second through hole (232); Wherein, the outer shaft (422) passes through the second through hole (232).

8. The door lock according to claim 1, characterized in that: The first lock box (1) further comprises a first lock cover (13), wherein the first lock cover (13) is provided with a first through hole (131); Wherein, the lock core barrel (41) passes through the first through hole (131).

9. The door lock according to claim 1, characterized in that: The first lock box (1) and the second lock box (2) are both semicircular in shape, and the first lock box (1) and the second lock box (2) are symmetrically distributed.

10. The door lock according to claim 1, characterized in that: The first lock box (1) and the second lock box (2) are both made of metal material.

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