Concealed lock body with two-way locking points

Abstract

The utility model provides a concealed lock body with two-way lock points, which belongs to the technical field of locksets and comprises a lock shell, a dead bolt, an inclined bolt, a lock cylinder and a square core shaft, a locking piece is rotatably arranged on the lock shell, a first linkage groove is arranged on the locking piece, a first column is arranged on the lock shell, a transmission piece is rotatably arranged on the first column, a first linkage column is protruded on the transmission piece, and the first linkage column is provided with a second linkage groove. The lock cylinder drives the square tongue to move, drives the transmission piece to rotate, drives the locking piece to rotate and enables the locking piece to be clamped with or separated from the square core shaft. The latch bolt and the dead bolt can be controlled separately, the latch bolt can be locked when the dead bolt extends out, meanwhile, a long transmission distance is needed by only adopting a transition piece originally, and at present, the transmission distance is divided into two appropriate transmission distances through dead bolt transition, so that the problems of dislocation, deformation, gear sliding and the like after the transition piece is stressed are solved, and the safety of the door lock is improved. And a structure that the first linkage column is inserted into the first linkage groove to form linkage matching is adopted, so that more stable and reliable matching can be formed.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, specifically to a concealed two-way locking point lock body. Background Technology

[0002] Mechanical locks are traditional locks based on a purely mechanical structure, achieving opening and closing control through the precise matching of a key and the internal structure of the lock cylinder. They primarily rely on mechanical principles such as gears, springs, and levers, and are characterized by high durability, stability, and independence from power limitations. They are widely used in door locks, cabinet locks, safes, and other similar applications. Due to their simple design and low cost, mechanical locks are very common in daily life, and their reliability and long service life have made them a fundamental security device for homes and businesses.

[0003] The applicant's earlier patent application, CN216197294U, disclosed a hidden locking point multi-point lock for thermally broken aluminum doors, including a lock shell, a square latch, a lock cylinder, a square core shaft, a transition piece, a locking plate, a reverse lifting plate, and a locking assembly. The transition piece has a hinged end that is hinged to the lock shell, a linkage end that is linked to the lock cylinder, and abutting end that abuts against the locking plate. The reverse lifting plate has a linkage part that is linked to the transition piece. The locking assembly includes a rotating plate, a middle sliding plate, and an unlocking plate. The rotating plate has a driving groove that is linked to the linkage part. When the lock shell is in use, the lock cylinder controls the rotation of the transition piece, which drives the locking plate to rotate, thereby locking and unlocking the square core shaft. This requires the linkage end and the abutting end in the transition piece to be set as two slender extension arms. As a result, the transition piece may experience misalignment, deformation, or slippage after long-term stress, affecting the normal function of the lock shell. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings and deficiencies of the existing technology and to provide a concealed two-way locking point lock body.

[0005] The technical solution adopted by this utility model is as follows: This application provides a concealed two-way locking point lock body, including a lock shell, a square latch, a beveled latch, a lock cylinder and a square core shaft. A locking plate is rotatably disposed on the lock shell, and a first linkage groove is disposed on the locking plate. A first column is disposed on the lock shell, and a transmission plate is rotatably disposed on the first column. A first linkage post protrudes from the transmission plate toward the first linkage groove and is inserted into the first linkage groove to form a linkage engagement. The lock cylinder drives the square latch to move, which drives the transmission plate to rotate, which drives the locking plate to rotate and makes it engage or disengage from the square core shaft.

[0006] In some embodiments, a limiting piece is also included. The square tongue is provided with a second linkage groove that cooperates with the lock cylinder. The limiting piece has a first position that extends into the second linkage groove to restrict the linkage between the lock cylinder and the square tongue, and a second position that exits the second linkage groove to allow the lock cylinder and the square tongue to link. The limiting piece is switched from the first position to the second position by reversing the square core shaft.

[0007] In some embodiments, a second linkage post is provided on the square tongue, and a first clearance hole is provided on the transmission plate. The second linkage post is slidably disposed in the first clearance hole, so that the square tongue does not rotate with the square spindle.

[0008] In some embodiments, a safety plate and a rotating plate are rotatably disposed on the first column, a synchronously rotating anti-lifting plate is disposed on the square core shaft, a third linkage column and a fourth linkage column are respectively disposed on the upper and lower sides of the anti-lifting plate, a third linkage groove is disposed on the safety plate for the third linkage column to be inserted to form a linkage engagement, and a fourth linkage groove is disposed on the rotating plate for the fourth linkage column to be inserted to form a linkage engagement.

[0009] In some embodiments, a fifth linkage post is provided between the safety plate and the rotating plate, and a second clearance hole is provided on the square tongue. The second clearance hole has a first abutting end and a second abutting end. When the limiting plate is in the first position, the fifth linkage post abuts against the first abutting end. When the limiting plate is in the second position, the fifth linkage post abuts against the second abutting end.

[0010] In some embodiments, the lock further includes an upper locking bar and a lower locking bar. The upper locking bar is slidably disposed on the lock housing along the direction from the lock cylinder to the square core shaft. The lower locking bar is slidably disposed on the lock housing in the opposite direction to the upper locking bar. A first linkage hole is provided at the end of the upper locking bar near the lower locking bar. A sixth linkage post is provided on the rotating plate to cooperate with the first linkage hole. A second linkage hole is provided at the end of the lower locking bar near the upper locking bar. A second post and a third post are provided on the lock housing. A seventh linkage post is provided to cooperate with the second linkage hole, a third linkage hole is provided to cooperate with the fifth linkage post, a hinge hole is provided to rotatably cooperate with the second post, and a fourth linkage hole is provided to slidably cooperate with the third post. The limiting plate has a limiting protrusion. When the square core shaft is lifted in reverse, the lifting plate drives the safety plate and the rotating plate to rotate, causing the upper locking bar and the lower locking bar to move in opposite directions, so that the limiting protrusion exits the second linkage groove.

[0011] In some embodiments, the square tongue is provided with a spring positioning post and a movable hole along its moving direction, the third column is slidably engaged with the movable hole, and a first return spring is provided on the third column and the spring positioning post.

[0012] In some embodiments, the device further includes a sliding plate and a second return spring. The sliding plate is disposed between the square tongue and the limiting plate. The lower end of the sliding plate extends into the second linkage groove and engages with the lock cylinder. The upper end of the square tongue is provided with a locking slide and a locking groove in sequence along the retraction direction of the square tongue. The sliding plate is provided with a locking pin that engages with the locking slide. When the lock cylinder controls the square tongue to extend out of the lock housing, the sliding plate moves toward the square core shaft, causing the second return spring to be pressed and stored, and causing the locking pin to slide into the locking groove along the locking slide, thereby locking the square tongue.

[0013] In some embodiments, an auxiliary spring is provided between the upper locking bar and the lock housing to assist the upper locking bar in extending.

[0014] In some embodiments, the square core shaft is provided with a synchronously rotating central locking plate and a paddle. The central locking plate is disposed between the paddle and the reverse lifting plate. The lock cylinder drives the square tongue to move, which drives the transmission plate to rotate, which drives the locking plate to rotate and engage or disengage it from the central locking plate. The paddle is provided with a paddle arm facing the oblique tongue. Rotating the square core shaft in the forward direction causes the paddle arm to drive the oblique tongue to unlock.

[0015] The beneficial effects of this utility model are as follows: In this utility model, the oblique latch and the square latch can be controlled separately. The square core shaft controls the oblique latch, and the lock cylinder controls the square latch. When the square latch extends, it can lock the oblique latch, forming a double locking mechanism. Secondly, previously, only a transition piece was used, which required a long transmission distance. Now, with the square latch as a transition, the transmission distance is divided into two suitable segments, thus avoiding problems such as misalignment, deformation, and slippage of the transition piece after long-term stress. In addition, the structure of inserting the first linkage column into the first linkage slot to form a linkage engagement can create a more stable and reliable engagement. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0017] Figure 1 This is an exploded view of a concealed two-way locking point lock body according to the present invention;

[0018] Figure 2 This is a schematic diagram of a concealed two-way locking point lock body according to the present invention;

[0019] Figure 3 This is a schematic diagram of the locking plate, the locking plate, and the transmission plate in this utility model;

[0020] Figure 4 This is a schematic diagram of the Chinese tongue, transmission plate, safety plate, and rotating plate of this utility model;

[0021] Figure 5 This is a schematic diagram of the lifting plate, safety plate, and rotating plate in this utility model;

[0022] Figure 6 This is a partial schematic diagram of a concealed two-way locking point lock body according to the present invention. Figure 1 ;

[0023] Figure 7 This is a partial schematic diagram of a concealed two-way locking point lock body according to the present invention. Figure 2 ;

[0024] Figure 8 This is a partial schematic diagram of a concealed two-way locking point lock body according to the present invention. Figure 3 ;

[0025] Figure 9 This is a partial schematic diagram of a concealed two-way locking point lock body according to the present invention. Figure 4 . Detailed Implementation

[0026] The following description provides specific application scenarios and requirements for this specification, intended to enable those skilled in the art to make and use the contents of this specification. Various partial modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the embodiments shown, but rather to the widest scope consistent with the claims.

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "longitudinal", "lateral", "radial", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element or component to have a specific orientation, or to be constructed and operated in a specific orientation.

[0028] Secondly, the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different components and should not be construed as limiting the embodiments of this application.

[0029] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral constructions; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two devices, components, or parts.

[0030] Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] Regarding the accompanying drawings of this application, it should be clearly understood that the drawings are for illustrative and descriptive purposes only and are not intended to limit the scope of this specification. It should also be understood that the drawings are not drawn to scale.

[0032] This application is based on the applicant's earlier patent application with publication number CN216197294U, which discloses an improved version of a multi-point lock for a thermally broken aluminum door with a hidden locking point. In this lock, the transition component may experience problems such as misalignment, deformation, and slippage after long-term stress.

[0033] Based on the above issues, such as Figures 1 to 9 As shown in the figure, this specification provides a concealed two-way locking lock body, including a lock shell 1, a square bolt 2, a beveled bolt 3, a lock cylinder, and a square core shaft 4. A locking plate 5 is rotatably mounted on the lock shell 1, and a first linkage groove 500 is provided on the locking plate 5. A first column 100 is provided on the lock shell 1, and a transmission plate 6 is rotatably mounted on the first column 100. A first linkage post 600 protrudes from the transmission plate 6 toward the first linkage groove 500 and inserts into the first linkage groove 500 to form a linkage engagement. The lock cylinder drives the square bolt 2 to move, which in turn drives the transmission plate 6 to rotate, thereby driving the locking plate 5... The lock cylinder rotates to engage or disengage from the square core shaft 4. When engaged, the square core shaft 4 cannot rotate; when disengaged, it can rotate. With this configuration, the lock cylinder needs to drive the transmission plate 6 and locking plate 5 through the square tongue 2 to lock and unlock the square core shaft 4. Compared to the original lock cylinder directly locking and unlocking the square core shaft 4 through the transition piece, both the square tongue and the latch are controlled by the square core shaft. In this lock, the two can be controlled separately. The square core shaft controls the latch, and the lock cylinder controls the square tongue. When the square tongue extends, it can lock the latch, forming a dual locking mechanism.

[0034] Secondly, the original method of using only a transition piece required a long transmission distance. Now, by using a square tongue transition piece, the transmission distance is divided into two suitable segments. Therefore, problems such as misalignment, deformation, and slippage of the transition piece after long-term stress will not occur.

[0035] Furthermore, the structure of inserting the first linkage column 600 into the first linkage slot 500 to form a linkage fit can create a more stable and reliable fit.

[0036] In some embodiments, a limiting piece 7 is also included. The square tongue 2 is provided with a second linkage groove 200 that cooperates with the lock cylinder. The limiting piece 7 has a first position that extends into the second linkage groove 200 to restrict the linkage between the lock cylinder and the square tongue 2, and a second position that exits the second linkage groove 200 to allow the lock cylinder and the square tongue 2 to be linked. The limiting piece 7 can be switched from the first position to the second position by reversing the square core shaft 4. Generally, the square core shaft 4 is connected to the door handle. The door handle rotates downwards in the forward direction, and the door handle is rotated upwards in the reverse direction. Reversing the lifting refers to the latter. It can be understood that when the square core shaft 4 is lifted up by a certain angle, such as 15°-30°, the limiting piece 7 can be switched from the first position to the second position. At this time, the lock cylinder can control the movement of the square tongue 2. When the square core shaft 4 has not been lifted, the lock cylinder cannot control the movement of the square tongue, but at this time the square core shaft 4 can control the latch 3.

[0037] The square tongue 2 is provided with a second linkage post 201, and the transmission plate 6 is provided with a first clearance hole 601. The first clearance hole 601 is an arc-shaped hole. The second linkage post 201 is slidably disposed in the first clearance hole 601, so that the square tongue 2 does not follow the square spindle 4 to rotate. That is, at this time, the square spindle 4 controls the oblique tongue 3 alone.

[0038] Furthermore, a safety plate 8 and a rotating plate 9 are rotatably mounted on the first column 100, and a synchronously rotating anti-lifting plate 10 is mounted on the square core shaft 4. The anti-lifting plate 10 has a third linkage column 1000 and a fourth linkage column 1001 respectively mounted on its upper and lower sides. The third linkage column 1000 and the fourth linkage column 1001 are coaxially mounted. The safety plate 8 is provided with a third linkage groove 800 for the third linkage column 1000 to be inserted to form a linkage engagement, and the rotating plate 9 is provided with a fourth linkage groove 900 for the fourth linkage column 1001 to be inserted to form a linkage engagement. Thus, when the square core shaft 4 is reversed, the anti-lifting plate 10 can simultaneously drive the safety plate 8 and the rotating plate 9 to rotate, improving the stability of the transmission structure, especially compared to a structure that only uses single-sided transmission.

[0039] A fifth linkage post 11 is provided between the safety plate 8 and the rotating plate 9. Optionally, the fifth linkage post 11 is formed by the protrusion of the rotating plate 9. A second clearance hole 202 is provided on the square tongue 2. The second clearance hole 202 is an arc-shaped hole with a first abutting end 2020 and a second abutting end 2021. When the limiting plate 7 is in the first position, the fifth linkage post 11 abuts against the first abutting end 2020. When the limiting plate 7 is in the second position, the fifth linkage post 11 abuts against the second abutting end 2021. At this time, the lock cylinder can control the square tongue 2 to move. This arrangement avoids interference between the square core shaft 4 and the square tongue 2 when the square core shaft 4 is lifted in reverse through the second clearance hole 202.

[0040] Specifically, such as Figure 7As shown, it also includes an upper locking bar 12 and a lower locking bar 13. The upper locking bar 12 is slidably disposed on the lock housing 1 along the direction from the lock cylinder to the square core shaft 4. The lower locking bar 13 is slidably disposed on the lock housing 1 in the opposite direction to the upper locking bar 12. The upper locking bar 12 is provided with a first linkage hole 1200 at one end near the lower locking bar 13. The rotating plate 9 is provided with a sixth linkage post 901 that cooperates with the first linkage hole 1200. The lower locking bar 13 is provided with a second linkage hole 1300 at one end near the upper locking bar 12. The lock housing 1 is provided with a second post 101 and a third post 102. The limiting plate 7 is provided with a part that cooperates with the second linkage hole 1300. The lock cylinder has a seventh linkage post 700, a third linkage hole 701 that cooperates with the fifth linkage post 11, a hinge hole 702 that rotatably cooperates with the second post 101, and a fourth linkage hole 703 that slidably cooperates with the third post 102. The first linkage hole 1200 and the second linkage hole 1300 are elongated holes arranged along the moving direction of the square tongue 2. The limiting piece 7 has a limiting protrusion 704. When the square core shaft 4 is lifted in reverse, the lifting piece 10 drives the safety piece 8 and the rotating piece 9 to rotate, which drives the upper locking bar 12 and the lower locking bar 13 to move in opposite directions, so that the limiting protrusion 704 exits the second linkage groove 200. Only then can the lock cylinder control the movement of the square tongue 2.

[0041] In some embodiments, the square tongue 2 is provided with a spring positioning post 203 and a movable hole 204 along its moving direction. The third post 102 is slidably engaged with the movable hole 204. The third post 102 and the spring positioning post 203 are provided with a first return spring 14. The structure of the first return spring 14 is shown in Figure 6. The first return spring 14 can improve the stability of the square tongue 2 in the locked position and the unlocked position, as well as improve the speed of the square tongue 2 extending and retracting.

[0042] In some embodiments, the system further includes a sliding plate 15 and a second return spring 16. The sliding plate 15 is disposed between the square tongue 2 and the limiting piece 7. The lower end of the sliding plate 15 extends into the second linkage groove 200 and engages with the lock cylinder. The upper end of the square tongue 2 is provided with a locking slide 205 and a locking groove 206 in sequence along the retraction direction of the square tongue 2. The sliding plate 15 is provided with a locking pin 1500 that engages with the locking slide 205. When the lock cylinder controls the square tongue 2 to extend out of the lock housing 1, the sliding plate 15 moves toward the square core shaft 4, causing the second return spring 16 to be pressed and stored, and causing the locking pin 1500 to slide into the locking groove 206 along the locking slide 205, thereby locking the square tongue 2. The locking slide 205 is an arc-shaped slide, which can ensure that the locking pin 1500 slides into the locking groove 206. This design improves the reliability and security of locking the square tongue 2.

[0043] In some embodiments, such as Figure 1As shown, an auxiliary spring 17 for assisting the extension of the upper locking bar 12 is provided between the upper locking bar 12 and the lock housing 1. Specifically, the upper locking bar 12 is provided with a spring mounting post and a sliding hole. The sliding hole is provided along the moving direction of the upper locking bar 12. The lock housing 1 is provided with a fourth post, which is in sliding cooperation with the sliding mechanism. The auxiliary spring 17 is provided on the spring mounting post and the fourth post. The auxiliary spring 17 assists the upper locking bar 12 in extending, ensuring the stability of the upper locking bar 12 in the extended and retracted positions.

[0044] In some embodiments, the square core shaft 4 is provided with a synchronously rotating central locking plate 18 and a lever 19. The central locking plate 18 is disposed between the lever 19 and the reverse lifting plate 10. The lock cylinder drives the square latch 2 to move, causing the transmission plate 6 to rotate, which in turn causes the locking plate 5 to rotate and engage or disengage with the central locking plate 18. The lever 19 is provided with a lever arm 1900 facing the oblique latch 3. Rotating the square core shaft 4 in the forward direction causes the lever arm 1900 to unlock the oblique latch 3. Figure 2 As shown, under normal conditions, under the action of the elastic element 20, the oblique tongue 3 extends out of the lock housing 1. When the square core shaft 4 rotates in the forward direction, the actuating arm 1900 presses against the oblique tongue 3 and moves backward to unlock.

[0045] In summary, after reading this detailed disclosure, those skilled in the art will understand that the foregoing detailed disclosure is presented by way of example only and is not restrictive. Although not explicitly stated herein, those skilled in the art will understand that the requirements of this application encompass various reasonable changes, improvements, and modifications to the embodiments. These changes, improvements, and modifications are intended to be made by this application and are within the spirit and scope of the exemplary embodiments of this application.

[0046] Furthermore, it should be understood that in the foregoing description of the embodiments of this application, various features are combined in a single embodiment, drawing, or description for the purpose of simplifying the understanding of a feature. However, this does not mean that the combination of these features is necessary, and those skilled in the art may readily identify some of the devices as separate embodiments when reading this application. That is, the embodiments in this application can also be understood as an integration of multiple sub-embodiments. It is also valid when each sub-embodiment contains fewer than all the features of a single foregoing disclosed embodiment.

[0047] Finally, it should be understood that the embodiments disclosed herein are illustrative of the principles of the embodiments of this application. Other modified embodiments are also within the scope of this application. Therefore, the embodiments disclosed herein are merely examples and not limitations. Those skilled in the art can adopt alternative configurations to implement the applications in this application based on the embodiments in this application. Therefore, the embodiments of this application are not limited to the embodiments precisely described in the application.

Claims

1. A concealed, two-way locking point lock body, comprising a lock shell, a square latch, a beveled latch, a lock cylinder, and a square core shaft, wherein a locking plate is rotatably disposed on the lock shell, and a first linkage groove is provided on the locking plate, characterized in that, The lock housing is provided with a first column, and a transmission plate is rotatably provided on the first column. The transmission plate has a first linkage post protruding towards the first linkage groove and is inserted into the first linkage groove to form a linkage engagement. The lock cylinder drives the square tongue to move, which drives the transmission plate to rotate, drives the locking plate to rotate, and makes it engage or disengage from the square core shaft.

2. The concealed two-way locking point lock body according to claim 1, characterized in that, It also includes a limiting piece, on which a second linkage groove is provided to cooperate with the lock cylinder. The limiting piece has a first position that extends into the second linkage groove to restrict the linkage between the lock cylinder and the square tongue, and a second position that exits the second linkage groove to allow the lock cylinder and the square tongue to link. The limiting piece can be switched from the first position to the second position by reversing the square core shaft.

3. The concealed two-way locking point lock body according to claim 2, characterized in that, The square tongue is provided with a second linkage post, and the transmission plate is provided with a first clearance hole. The second linkage post is slidably disposed in the first clearance hole, so that the square tongue does not rotate with the square spindle.

4. A concealed two-way locking point lock body according to claim 2, characterized in that, The first column is rotatably equipped with a safety plate and a rotating plate. The square core shaft is equipped with a synchronously rotating anti-lifting plate. The anti-lifting plate is equipped with a third linkage column and a fourth linkage column on its upper and lower sides, respectively. The safety plate is equipped with a third linkage groove for the third linkage column to be inserted to form a linkage engagement. The rotating plate is equipped with a fourth linkage groove for the fourth linkage column to be inserted to form a linkage engagement.

5. A concealed two-way locking point lock body according to claim 4, characterized in that, A fifth linkage post is provided between the safety plate and the rotating plate. A second clearance hole is provided on the square tongue. The second clearance hole has a first abutment end and a second abutment end. When the limiting plate is in the first position, the fifth linkage post abuts against the first abutment end. When the limiting plate is in the second position, the fifth linkage post abuts against the second abutment end.

6. A concealed two-way locking point lock body according to claim 5, characterized in that, It also includes an upper locking bar and a lower locking bar. The upper locking bar is slidably disposed on the lock housing along the direction from the lock cylinder to the square core shaft. The lower locking bar is slidably disposed on the lock housing in the opposite direction to the upper locking bar. The upper locking bar has a first linkage hole at one end near the lower locking bar. The rotating plate has a sixth linkage post that cooperates with the first linkage hole. The lower locking bar has a second linkage hole at one end near the upper locking bar. The lock housing has a second post and a third post. The limiting plate has a seventh linkage post that cooperates with the second linkage hole, a third linkage hole that cooperates with the fifth linkage post, a hinge hole that rotatably cooperates with the second post, and a fourth linkage hole that slidably cooperates with the third post. The limiting plate has a limiting protrusion. When the square core shaft is lifted in reverse, the lifting plate drives the safety plate and the rotating plate to rotate, causing the upper locking bar and the lower locking bar to move in opposite directions, so that the limiting protrusion exits the second linkage groove.

7. A concealed two-way locking point lock body according to claim 6, characterized in that, The square tongue is provided with a spring positioning post and a movable hole along its moving direction. The third column is slidably engaged with the movable hole, and a first return spring is provided on the third column and the spring positioning post.

8. A concealed two-way locking point lock body according to claim 6, characterized in that, It also includes a sliding plate and a second return spring. The sliding plate is disposed between the square tongue and the limiting plate. The lower end of the sliding plate extends into the second linkage groove and is linked with the lock cylinder. The upper end of the square tongue is provided with a locking slide and a locking groove in sequence along the retraction direction of the square tongue. The sliding plate is provided with a locking pin that is linked with the locking slide. When the lock cylinder controls the square tongue to extend out of the lock housing, the sliding plate moves toward the square core shaft, so that the second return spring is pressed and stored, and the locking pin slides into the locking groove along the locking slide, thereby locking the square tongue.

9. A concealed two-way locking point lock body according to claim 6, characterized in that, An auxiliary spring is provided between the upper locking bar and the lock housing to assist the upper locking bar in extending.

10. A concealed two-way locking point lock body according to claim 6, characterized in that, The square core shaft is provided with a synchronously rotating central locking plate and a lever plate. The central locking plate is located between the lever plate and the reverse lifting plate. The lock cylinder drives the square tongue to move, which drives the transmission plate to rotate, and drives the locking plate to rotate, making it engage or disengage with the central locking plate. The lever plate is provided with a lever arm facing the oblique tongue. Rotating the square core shaft in the forward direction causes the lever arm to drive the oblique tongue to unlock.

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