Lock cylinder and lock comprising same

Abstract

This utility model discloses a lock cylinder and a lock device including the same. The lock cylinder is used for a swing door. The lock cylinder includes: a lock cylinder shell; a latch made of plastic, which is disposed in the lock cylinder shell and includes a head that can move between an extended position and a retracted position relative to the lock cylinder shell. The outer wall of the head is provided with a guide surface for colliding with the door frame or lock box to move the head to the retracted position. The head is also provided with a connecting groove; a reinforcing member disposed in the connecting groove; and an elastic member disposed in the lock cylinder shell, which is configured to elastically drive the latch to return the head to the extended position. Thus, by changing the latch to a plastic material, when the latch collides with the door frame or lock box, the plastic material of the latch has a certain buffering performance, resulting in a smaller impact force and effectively reducing damage to the door frame surface. This avoids the unsightly problem caused by a long guide sidewall, making the overall appearance of the swing door simpler and more aesthetically pleasing.

Description

Technical Field

[0001] This utility model belongs to the technical field of door and window hardware accessories, specifically relating to lock cylinders and locks including them. Background Technology

[0002] A typical swing door includes a door frame, a door body, and a lock. The door body is rotatably connected to the first side of the door frame via a hinge structure. The lock includes a lock box and a lock cylinder. The lock box is located on the second side of the door frame and has a lock groove. The lock cylinder includes a lock cylinder housing, a latch, and a spring element. The lock cylinder housing is mounted on the door body. The latch is slidably mounted on the lock cylinder housing and can slide between an extended position and a retracted position relative to the lock cylinder housing. The spring element is located on the lock cylinder housing and is configured to forcefully drive the latch to the extended position. When closing the swing door, the user typically applies a pushing force to the door body, causing it to rotate relative to the door frame. During the closing process, the latch will collide with the door frame and move to the retracted position. The latch is retracted until it aligns with the lock groove. Under the action of the elastic element, the latch returns to its extended position and engages with the lock groove, thus completing the closing process. Specifically, Chinese Patent No. CN214996753U discloses a door lock box flat frame structure. This door lock box flat frame structure includes a lock box, which has a mounting part and a sliding part. The mounting part has an opening, and the base rubber part has a lock box slot corresponding to the shape and structure of the lock box. The lock box slot includes a mounting groove corresponding to the mounting part and a slot corresponding to the sliding part. The length of the sliding part (equivalent to the aforementioned guide sidewall) is obviously relatively long.

[0003] However, latches are usually made of metal, and the collision between the latch and the door frame during closing can easily damage the surface of the door frame. To solve this problem, the commonly used technical means is to add an outwardly extending guide sidewall at the opening of the lock groove, and the latch has a guide surface for colliding with the guide sidewall. In this way, when closing the door, the latch will collide with the guide sidewall instead of directly colliding with the door frame. However, this brings new problems. The guide sidewall needs to extend a considerable length to avoid the latch directly colliding with the door frame, and a long guide sidewall is very unsightly and affects the overall appearance of the swing door. Utility Model Content

[0004] In order to overcome at least one of the defects described in the prior art, the present invention provides a lock cylinder and a lock including the same, to solve the problems in the prior art where the metal material of the latch bolt easily damages the door frame and the addition of guide sidewalls affects the aesthetics, while ensuring the normal use function and structural reliability of the lock cylinder.

[0005] The technical solution adopted by this utility model to solve its problem is:

[0006] A lock cylinder for a swing door includes: a lock cylinder housing; a latch made of plastic, the latch being disposed in the lock cylinder housing, the latch including a head, the head being movable relative to the lock cylinder housing between an extended position and a retracted position, the outer wall of the head being provided with a guide surface, the guide surface being used to collide with a door frame or lock box to move the head to the retracted position, the head also being provided with a connecting groove; a reinforcing member disposed in the connecting groove; and an elastic member disposed in the lock cylinder housing, the elastic member being configured to elastically drive the latch to return the head to the extended position.

[0007] As an optional implementation, the head moves back and forth in a straight line along a first direction, the head has an abutting plane perpendicular to the first direction, and a chamfer structure is provided between the guide surface and the abutting plane.

[0008] As an optional implementation, the head includes a head body and a head cover, the head cover being fitted onto the head body, the guide surface being disposed on the head cover, and the connecting groove being disposed on the head body.

[0009] As an optional implementation, the head body is provided with a locking block, the head cover is provided with a locking slot, and the locking block is locked in the locking slot.

[0010] As an optional implementation, the latch further includes a sliding body, which is slidably disposed within the lock cylinder housing along a first direction. The head is connected to the first end of the sliding body, and the head and the sliding body slide synchronously. The elastic element is disposed between the sliding body and the lock cylinder housing.

[0011] As an optional implementation, the first end of the sliding body has a limiting sidewall disposed opposite to the locking block, the limiting sidewall abutting against the headgear, and the limiting sidewall and the locking block together restricting the movement of the headgear relative to the head body.

[0012] As an optional implementation, the sliding body is provided with a reinforcing part, which is located at the junction between the sliding body and the head. The reinforcing part is connected to the connecting groove, and the reinforcing member extends into the reinforcing part.

[0013] As an optional implementation, the head body and the sliding body are integrally formed.

[0014] As an optional implementation, the head moves linearly back and forth along a first direction, and the reinforcing member and the connecting groove extend along the first direction.

[0015] As an optional implementation, at least two connecting slots are provided, and the at least two connecting slots are distributed at intervals on the head. The number of reinforcing members is equal to the number of connecting slots, and the reinforcing members are provided one-to-one with the connecting slots.

[0016] This utility model also provides a lock, including a lock cylinder as described in any of the above embodiments, and a lock box, the lock box being used to be installed on a door frame, the lock box being provided with a lock groove, the head being engaged with the lock groove when in the extended position, and being separated from the lock groove when in the retracted position.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] Firstly, by changing the traditional metal latch to a plastic material, the plastic latch has a certain buffering capacity when it collides with the door frame or lock box during the closing process. This reduces the impact force generated by the collision and effectively reduces damage to the door frame surface. The problem of damage when the latch collides with the door frame is solved. As a result, there is no need to set a guide sidewall that extends a long distance from the lock slot opening to prevent the latch from directly colliding with the door frame, as is the case with existing technologies. This allows for a shorter guide sidewall or even a design without a guide sidewall, thus avoiding the unsightly problem caused by a long guide sidewall and making the overall appearance of the swing door simpler and more beautiful.

[0019] Secondly, the latch is made of plastic, which is easy to process and has a low production cost. Furthermore, even though the latch is made of plastic, a reinforcing component is fixed in the connecting groove at the head of the latch. The reinforcing component can enhance the structural strength of the key parts of the latch, ensuring that the latch will not be easily damaged due to the characteristics of plastic during frequent extension and retraction movements and collisions with the door frame or lock box. This ensures the overall reliability and stability of the lock cylinder and extends the service life of the lock cylinder. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of the lock cylinder according to an embodiment of this application;

[0022] Figure 2 This is an exploded view of the lock cylinder according to an embodiment of this application.

[0023] Figure 3 This is an exploded view of the lock cylinder according to an embodiment of this application from a second perspective;

[0024] Figure 4 This is a schematic diagram of the internal structure of the lock cylinder according to an embodiment of this application;

[0025] Figure 5 This is a schematic diagram of the headgear structure according to an embodiment of this application.

[0026] Explanation of key figure labels:

[0027] 1. Lock cylinder shell; 11. Guide post; 2. Slanted tongue; 21. Head; 211. Head body; 212. Head cover; 213. Guide surface; 214. Connecting groove; 215. Locking block; 216. Locking groove; 217. Abutting surface; 218. Chamfered structure; 22. Sliding body; 221. Limiting sidewall; 222. Reinforcing part; 223. Guide groove; 3. Reinforcing member; 4. Elastic member; 5. Drive assembly. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0030] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0031] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0032] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0033] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0034] Please see Figures 1 to 5 This application provides a lock cylinder for a swing door. The lock cylinder includes a lock cylinder shell 1, a latch 2, a reinforcing member 3, and an elastic member 4. The latch 2 is made of plastic and is disposed in the lock cylinder shell 1. The latch 2 includes a head 21, which can move relative to the lock cylinder shell 1 between an extended position and a retracted position. The outer wall of the head 21 is provided with a guide surface 213, which is used to collide with the door frame or lock box to move the head 21 to the retracted position. The head 21 is also provided with a connecting groove 214. The reinforcing member 3 is fixed in the connecting groove 214. The elastic member 4 is disposed in the lock cylinder shell 1 and is configured to elastically drive the latch 2 to reset the head 21 to the extended position.

[0035] The lock cylinder provided in this application embodiment, in the first aspect, changes the traditional metal material of the latch 2 to a plastic material. During the closing process, when the latch 2 collides with the door frame or lock box, the plastic material of the latch 2 has a certain buffering performance, which reduces the impact force generated by the collision and effectively reduces the damage to the surface of the door frame. The problem of damage when the latch 2 collides with the door frame is solved. In this way, it is not necessary to set a guide sidewall with a large extension at the lock groove opening to avoid the latch 2 from directly colliding with the door frame, as in the prior art. It allows for a shorter guide sidewall or even a design without a guide sidewall, thereby avoiding the unsightly problem caused by setting a long guide sidewall, and making the overall appearance of the swing door simpler and more beautiful. Secondly, the latch 2 is made of plastic, which is easy to process and has a low production cost. Furthermore, even though the latch 2 is made of plastic, a reinforcing member 3 is fixed within the connecting groove 214 of the head 21 of the latch 2. The reinforcing member 3 enhances the structural strength of key parts of the latch 2, ensuring that the latch 2 will not be easily damaged due to the characteristics of plastic during frequent extension and retraction movements and collisions with the door frame or lock box. This ensures the overall reliability and stability of the lock cylinder and extends its service life. Thirdly, the elastic member 4 is located inside the lock cylinder housing 1 and can elastically drive the latch 2, like in existing technologies, to reset the head 21 of the latch 2 to the extended position. During closing, when the guide surface 213 of the outer wall of the head 21 of the latch 2 collides with the door frame or lock box, the head 21 can still move smoothly to the retracted position. When it aligns with the lock groove, the head 21 can reset under the action of the elastic member 4 and engage with the lock groove, thus ensuring the normal closing and locking functions of the swing door lock without affecting the user experience.

[0036] In one embodiment, the reinforcing member 3 is made of a metal with high hardness. Thus, the high-hardness metal reinforcing member 3 effectively enhances the overall structural strength of the latch 2, making it less prone to deformation or damage when subjected to external impacts. Furthermore, the reinforcing member 3 can withstand greater external forces, reducing fatigue damage to the latch 2 caused by frequent collisions, thereby significantly extending the service life of the latch 2. This not only reduces the frequency of lock maintenance and replacement, reducing user costs, but also improves the overall reliability and stability of the lock.

[0037] It should be noted that in some other embodiments, the reinforcing member 3 may also be made of a synthetic material with a hardness greater than that of plastic, and the choice can be made according to actual needs, without making a unique limitation here.

[0038] like Figure 4 and Figure 5As shown, in one embodiment, the head 21 reciprocates linearly along a first direction. The head 21 has an abutment plane 217 perpendicular to the first direction, and a chamfer structure 218 is provided between the guide surface 213 and the abutment plane 217. Thus, when the guide surface 213 is pressed by the door frame or lock box, causing the head 21 to move to a near-retracted position, the chamfer structure 218 will first contact the door frame or lock box. Due to the shape of the chamfer structure 218, it can transform the rigid contact that might have directly acted on the abutment plane 217 and the surface of the door frame or lock box into a smoother transition contact, effectively dispersing the contact pressure and preventing the abutment plane 217 from scratching the surface of the door frame or lock box in a sharp and direct manner, thereby protecting the appearance integrity of the door frame and lock box.

[0039] In one implementation, the first direction may be referenced. Figure 4 In the e1 direction.

[0040] like Figure 1 , Figure 2 and Figure 3 As shown, in one embodiment, the head 21 includes a head body 211 and a head cover 212. The head cover 212 is fitted onto the head body 211, a guide surface 213 is disposed on the head cover 212, and a connecting groove 214 is disposed on the head body 211. Thus, firstly, since the head cover 212 is detachable, when the head 21 of the latch 2 is damaged, only the head cover 212 needs to be replaced, without replacing the entire latch 2. This design makes maintenance of the latch 2 more convenient and quick, reducing maintenance costs. Secondly, by placing the guide surface 213 on the head cover 212, the design and adjustment of the guiding function become more flexible. Since the head cover 212 is an independently replaceable component, head covers 212 with different guide surface 213 designs can be easily replaced to achieve precise guiding, taking into account the differences in shape and size of different types of door frames or lock boxes. Thirdly, by setting the connecting groove 214 on the head body 211, a stable and precise installation position is provided for the reinforcing member 3. During the manufacturing process, the reinforcing member 3 can be more easily and accurately installed into the connecting groove 214, ensuring a tight fit between the reinforcing member 3 and the head body 211, and improving the installation quality and stability of the reinforcing member 3. Moreover, the head sleeve 212, which is fitted onto the head body 211, can provide a certain degree of protection for the head body 211 and the reinforcing member 3 in the connecting groove 214, preventing the reinforcing member 3 from being directly corroded and impacted by the external environment, further ensuring the performance and structural integrity of the reinforcing member 3, thereby enhancing the overall structural strength of the oblique tongue 2.

[0041] like Figure 2 and Figure 3As shown, in one embodiment, the head body 211 is provided with a locking block 215, and the head cover 212 is provided with a locking groove 216, with the locking block 215 locking into the locking groove 216. Thus, firstly, this locking design of the locking block 215 and the locking groove 216 makes the assembly process of the head body 211 and the head cover 212 extremely simple. Operators only need to align the locking block 215 on the head body 211 with the locking groove 216 on the head cover 212, and gently press or push to achieve a quick and accurate connection between the two, greatly shortening assembly time, improving production efficiency, and effectively reducing production costs. Furthermore, this locking method is easy to understand and operate for non-professionals or ordinary users. Even without professional assembly skills and experience, the assembly of the head body 211 and the head cover 212 can be easily completed, improving the product's assemblability and the convenience for users to repair and replace parts themselves. Secondly, the structural design of the locking block 215 being locked in the slot 216 can provide a reliable connection force, ensuring that the head body 211 and the head cover 212 will not easily separate during use; during the frequent opening and closing of the swing door, the latch 2 will be subjected to repeated collisions and friction from the door frame or lock box, and the locking structure between the head body 211 and the head cover 212 can withstand these external forces, maintain a stable connection state, and ensure that the normal use function of the lock cylinder is not affected.

[0042] It should be noted that in some other embodiments, the slot 216 can be provided on the head body 211, and the card block 215 can be correspondingly provided on the head cover 212.

[0043] like Figure 2 and Figure 3 As shown, in one embodiment, the latch 2 further includes a sliding body 22, which is slidably disposed within the lock cylinder housing 1 along a first direction. A head 21 is connected to the first end of the sliding body 22, and the head 21 and the sliding body 22 slide synchronously. An elastic element 4 is disposed between the sliding body 22 and the lock cylinder housing 1. Thus, in the first aspect, the sliding body 22 slides within the lock cylinder housing 1 along the first direction, providing a clear and stable guide for the overall movement of the latch 2. This design allows the latch 2 to move strictly in a predetermined direction during its extension and retraction, avoiding abnormal collisions or jamming with components such as the door frame and lock box caused by deviations in the direction of movement, greatly improving the accuracy of the lock cylinder operation. Secondly, the elastic element 4 is located between the sliding body 22 and the lock cylinder shell 1, and can directly apply elastic force to the sliding body 22. Since the head 21 is connected to the sliding body 22, this direct elastic force transmission makes the drive of the latch 2 by the elastic element 4 more efficient and direct. During the closing process, when the latch 2 needs to be reset and extended, the elastic element 4 can quickly transmit the elastic force to the sliding body 22, thereby driving the head 21 to quickly and accurately return to the extended position, ensuring the timeliness and reliability of the locking action.

[0044] like Figure 2 and Figure 3 As shown, in one embodiment, the first end of the sliding body 22 has a limiting sidewall 221 disposed opposite to the locking block 215. The limiting sidewall 221 abuts against the headgear 212, and the limiting sidewall 221 and the locking block 215 together restrict the movement of the headgear 212 relative to the head body 211. Thus, in the first aspect, by the combined action of the limiting sidewall 221 and the locking block 215 at the first end of the sliding body 22, the movement of the headgear 212 relative to the head body 211 is restricted from two different directions. This bidirectional constraint mechanism can more accurately control the position of the headgear 212 and prevent it from shaking, shifting, or falling off when subjected to external forces. Secondly, during the assembly of the lock cylinder, the setting of the limiting sidewall 221 and the locking block 215 makes the installation of the head cover 212 easier. The operator only needs to place the head cover 212 in a suitable position on the head body 211, so that the limiting sidewall 221 abuts against the head cover 212, and the locking block 215 and the slot 216 can be engaged. This design reduces the adjustment and calibration steps required during the assembly process, reduces the assembly difficulty, and improves the assembly efficiency.

[0045] like Figure 1 , Figure 2 and Figure 3 As shown, in one embodiment, the sliding body 22 has a guide groove 223 extending along a first direction. The guide groove 223 is used to slide with the guide post 11 of the lock cylinder shell 1. Thus, the guide groove 223 extending along the first direction and slidingly connecting with the guide post 11 of the lock cylinder shell 1 provides a precise track for the movement of the sliding body 22 within the lock cylinder shell 1. This ensures that the sliding body 22 can only move linearly along the predetermined first direction, avoiding irregular movements such as deviation or torsion during its movement.

[0046] It should be noted that in some other embodiments, the guide post 11 can be disposed on the sliding body 22, and the guide groove 223 can be disposed on the lock cylinder shell 1 accordingly.

[0047] like Figure 1 , Figure 2 and Figure 3As shown, in one embodiment, the sliding body 22 is provided with a reinforcing portion 222, which is located at the junction between the sliding body 22 and the head 21. The reinforcing portion 222 is connected to the connecting groove 214, and the reinforcing member 3 extends into the reinforcing portion 222. Thus, firstly, during the long-term use of the lock cylinder, the sliding body 22 and the head 21 will continuously undergo relative movement and bear alternating loads, which can easily lead to fatigue cracks at the junction. The presence of the reinforcing portion 222 can increase the material thickness and strength in this area, slow down the generation and propagation rate of fatigue cracks, extend the service life of the lock cylinder, and reduce lock cylinder failures caused by fatigue fracture. Secondly, after the reinforcing member 3 extends into the reinforcing portion 222, it forms a tight integral with the sliding body 22 and the head 21. This connection method increases the contact area and friction between the components, making the connection between the reinforcing member 3 and the sliding body 22 and the head 21 more robust and reliable. Furthermore, when the lock cylinder is subjected to torsional force, the longer reinforcing member 3 can provide greater torsional stiffness.

[0048] In one embodiment, the head 21 reciprocates linearly along a first direction, and both the reinforcing member 3 and the connecting groove 214 extend along the first direction. Thus, the reinforcing member 3, extending along the moving direction of the head 21, directly provides additional support to the head 21, reducing structural deformation or damage caused by vibration and impact during collisions.

[0049] like Figure 2 and Figure 3 As shown, in one embodiment, the head body 211 and the sliding body 22 are integrally formed. This integral design makes the head body 211 and the sliding body 22 a continuous and complete whole, without any connection gaps or stress concentration points, greatly improving the overall strength and stability of the structure. Furthermore, the integrally formed head body 211 and sliding body 22 have better resistance to deformation. Due to the absence of connecting parts, the entire structure can deform more evenly under stress, reducing the possibility of excessive local deformation.

[0050] It should be noted that in some other embodiments, the head body 211 and the sliding body 22 may be connected by screws or pins, but not limited to screws or pins. The choice can be made according to actual needs, and no single limitation is made here.

[0051] like Figure 2 and Figure 3As shown, in one embodiment, two connecting grooves 214 are provided, which are spaced apart on the head 21. The number of reinforcing members 3 is equal to the number of connecting grooves 214, and the two reinforcing members 3 are correspondingly arranged in the two connecting grooves 214. In this way, when the head 21 is subjected to external force, the two spaced connecting grooves 214 and their corresponding reinforcing members 3 can disperse the stress to different areas. Each reinforcing member 3 can jointly bear and disperse these forces, avoiding excessive concentration of local stress on one connecting groove 214 and reinforcing member 3, thereby reducing the risk of structural damage and improving the overall structural resistance of the head 21.

[0052] It should be noted that in some other embodiments, the number of connecting slots 214 may be, but is not limited to, 1, 3 or 4, and the number of reinforcing members 3 may be equal to the number of connecting slots 214, and no unique limitation is made here.

[0053] In one embodiment, the guide surface 213 is a guide ramp inclined in a first direction.

[0054] In one embodiment, the guide surface 213 is a guide arc surface inclined in the first direction.

[0055] like Figure 1 , Figure 2 and Figure 3 As shown, in one embodiment, the lock cylinder further includes a drive assembly 5. The latch 2 and the drive assembly 5 are both disposed in the lock housing. The latch 2 and the drive assembly 5 are connected in a transmission manner. Under the drive of the drive assembly 5, the latch 2 can slide relative to the lock cylinder housing 1 to extend and retract the head 21.

[0056] In one embodiment, the drive assembly 5 is used for connection with the door handle drive.

[0057] In some embodiments, the plastic material used to make the tongue 2 can be, but is not limited to, PC, PA, PET, ABS, POM, PS, PMMA, PBT, or PPO, etc., and can be selected according to actual needs.

[0058] It should be noted that in some other embodiments, the reinforcing member and the connecting groove may also be arranged in a manner that is inclined to or perpendicular to the first direction. The choice can be made according to actual needs, and no single limitation is made here.

[0059] This application embodiment also provides a lock, including a lock cylinder as described in any of the above embodiments, and a lock box, which is used to be installed on a door frame. The lock box is provided with a lock groove, and the head 21 is engaged with the lock groove when it is in the extended position and separated from the lock groove when it is in the retracted position.

[0060] In summary, the lock cylinder and lock assembly including the present invention disclosed herein can bring at least the following beneficial technical effects:

[0061] (1) During the closing process, when the latch 2 collides with the door frame or lock box, the plastic material of the latch 2 has a certain buffering performance, which makes the impact force generated by the collision smaller and can effectively reduce the damage to the surface of the door frame. The damage problem when the latch 2 collides with the door frame is solved.

[0062] (2) Unlike existing technologies, there is no need to set a guide sidewall that extends a long distance at the lock slot opening to prevent the tongue 2 from directly colliding with the door frame. This avoids the unsightly problem caused by setting a long guide sidewall, making the overall appearance of the swing door simpler and more beautiful.

[0063] (3) The tongue 2 is made of plastic material, which is easy to process and has a low production cost. Even though the tongue 2 is made of plastic material, a reinforcing member 3 is fixed in the connecting groove 214 of the head 21 of the tongue 2. The reinforcing member 3 can enhance the structural strength of the key parts of the tongue 2, ensuring that the tongue 2 will not be easily damaged due to the characteristics of plastic material, thus ensuring the overall reliability and stability of the lock cylinder.

[0064] (4) The chamfered structure 218 can transform the rigid contact that may have directly acted on the abutting surface 217 and the surface of the door frame or lock box into a smoother transition contact, effectively dispersing the contact pressure and preventing the abutting surface 217 from scratching the surface of the door frame or lock box in a sharp and direct manner, thereby protecting the appearance integrity of the door frame and lock box.

[0065] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A lock cylinder for a side hung door, characterised in that, include: Lock cylinder shell (1); The latch (2) is made of plastic and is disposed on the lock cylinder shell (1). The latch (2) includes a head (21) which can move relative to the lock cylinder shell (1) between an extended position and an inward position. The outer side wall of the head (21) is provided with a guide surface (213) which is used to collide with the door frame or lock box to move the head (21) to the inward position. The head (21) is also provided with a connecting groove (214). A reinforcing member (3) is disposed within the connecting groove (214); An elastic element (4) is disposed in the lock cylinder housing (1), the elastic element (4) being configured to elastically drive the latch (2) to reset the head (21) to the extended position.

2. The lock cylinder of claim 1, wherein, The head (21) moves back and forth in a straight line along the first direction. The head (21) has an abutting plane (217) perpendicular to the first direction. A chamfer structure (218) is provided between the guide surface (213) and the abutting plane (217).

3. The lock cylinder of claim 1, wherein, The head (21) includes a head body (211) and a head cover (212), the head cover (212) is fitted onto the head body (211), the guide surface (213) is disposed on the head cover (212), and the connecting groove (214) is disposed on the head body (211).

4. The lock cylinder of claim 3, wherein, The head body (211) is provided with a locking block (215), and the head cover (212) is provided with a locking groove (216), and the locking block (215) is locked in the locking groove (216).

5. The lock cylinder of claim 4, wherein, The tongue (2) further includes a sliding body (22), which is slidably disposed in the lock cylinder shell (1) along a first direction. The head (21) is connected to the first end of the sliding body (22), and the head (21) and the sliding body (22) slide synchronously. The elastic element (4) is disposed between the sliding body (22) and the lock cylinder shell (1).

6. The lock cylinder of claim 5, wherein, The first end of the sliding body (22) has a limiting sidewall (221) that is disposed opposite to the locking block (215). The limiting sidewall (221) abuts against the headgear (212). The limiting sidewall (221) and the locking block (215) together restrict the movement of the headgear (212) relative to the head body (211).

7. The lock cylinder of claim 5, wherein, The sliding body (22) is provided with a reinforcing part (222), which is located at the junction between the sliding body (22) and the head (21). The reinforcing part (222) is connected to the connecting groove (214), and the reinforcing member (3) extends into the reinforcing part (222).

8. The lock cylinder of claim 5, wherein, The head body (211) and the sliding body (22) are integrally formed.

9. The lock cylinder according to any one of claims 1-8, characterized in that The head (21) moves back and forth in a straight line along the first direction, and the reinforcing member (3) and the connecting groove (214) both extend along the first direction.

10. A lock, characterized by The lock cylinder includes any one of claims 1-9, and also includes a lock box for mounting on a door frame. The lock box has a lock groove, and the head (21) engages with the lock groove when it is in the extended position and separates from the lock groove when it is in the retracted position.

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