Double-operation type anti-misoperation cam lock and application thereof

Abstract

The invention relates to the technical field of cam locks, in particular to a double-operation type anti-misoperation cam lock and application thereof. The end face of the inner side of the lock body sinks inwards along the center to form a positioning groove, and step bosses are formed on the two sides of the positioning groove respectively; a mounting hole matched with the lock cylinder is formed in one end of the spring bolt, and a U-shaped groove matched with the stop lever is formed in the other end of the spring bolt; a wedge-shaped boss is arranged on the inner side of the mounting hole, and the wedge-shaped boss is matched with the stepped boss to act; double-operation rotary unlocking of the spring bolt is achieved through front face pressurization of a key or back face pulling force of a twisting handle, unlocking convenience of a traditional key is reserved, a twisting handle operation mode is added, more choices are provided for a user, and the lock is suitable for different scenes. The lock body step boss is matched with the lock tongue wedge-shaped boss, and the spring pretightening force is added, so that the lock tongue rotates by 180 degrees in one direction, and misoperation is prevented; the high boss prevents the wedge-shaped boss from being separated, the short boss guides one-way rotation, it is ensured that the spring bolt is stable, and the function that the roller shutter is locked at the fixed position is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of cam locks, and in particular to a dual-operation anti-misoperation cam lock and application thereof. Background Art

[0002] As rail transit speeds up, the demand for roller shutters becomes more diverse. Although conventional roller shutters can stop at any position, they cannot be locked at the corresponding position. To solve this problem, those skilled in the art are constantly exploring. For example, Chinese Patent Publication No. CN116988694A discloses an oblique lock tongue structure and a door lock, which uses a locking member to reverse the oblique lock tongue to achieve left-opening or right-opening of the door lock. However, this solution still has shortcomings: on the one hand, the existing roller shutter locks have a single operation mode, either only able to be unlocked with a key, or lack a convenient backup operation mode; on the other hand, the lock tongue lacks an effective anti-misoperation design. During normal use, it is easy to rotate accidentally due to external vibration, collision or human error, causing the roller shutter to be unable to be stably fixed, affecting normal use and safety. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a dual-operation anti-misoperation cam lock and application thereof.

[0004] The technical solution adopted in the present invention is as follows: A dual-operation anti-misoperation cam lock comprises a lock body, a lock core, a lock tongue and a twist handle. One end of the lock core passes through the lock body and is connected to the twist handle at the other end. The lock tongue is fixed in the middle of the lock core. The lock body is in the shape of a hollow column, with an enlarged outer end face and a gasket sleeved thereon, and an inner end face concave inward along the center to form a positioning groove, with semi-circular stepped bosses of different heights formed on both sides of the positioning groove; The lock core is a solid rod, one side of which is clamped in the lock body by a spring, and the other side is fixed to the twist handle by a limit screw, and a limit nut is provided in the middle to match the lock tongue; The lock tongue is in the shape of an elongated plate, with a mounting hole at one end for cooperating with the lock core and a U-shaped groove at the other end for cooperating with the blocking rod; a wedge-shaped boss is provided inside the mounting hole, and the wedge-shaped boss cooperates with the stepped boss to operate.

[0005] In this technical solution, a lock body and a twist handle are respectively provided on both sides of the lock cylinder, and the double-operation rotary lock tongue can be opened or locked on the front and back sides; the lock body has a stepped boss, and the lock tongue has a wedge-shaped boss, which cooperates with the preload force of the spring to realize one-way rotation of the lock tongue, which can effectively prevent misoperation; the lock tongue also has a U-shaped groove for matching the lock to ensure one-way rotation within a 180° range. Specifically, the positioning groove on the inside of the lock body and the high and low stepped bosses provide guidance and limitation for the lock core; the spring clamping device enables the lock core to have elastic reset ability, the limit screw is connected to the twist handle to realize the transmission of rotational force, and the limit nut fixes the position of the lock tongue; the lock tongue is slender and plate-shaped, matching the mounting hole and the U-shaped groove, and the wedge-shaped boss and the stepped boss in the mounting hole are used to prevent misoperation. When the lock core rotates, the wedge-shaped boss needs to pass through in a specific height step sequence. If the operation is improper, the wedge-shaped boss will be blocked by the higher step, and the unlocking or locking action cannot be completed, effectively preventing misoperation; at the same time, the U-shaped groove cooperates with the stop rod to ensure that the lock tongue can realize the opening and closing function of the lock under correct operation. The overall structure is compact, and the effect of locking in a fixed position is achieved.

[0006] In addition, the dual-operation anti-misoperation cam lock according to the present invention also has the following additional technical features: According to one embodiment of the present invention, a mounting plate and a mounting nut are provided on the outside of the lock body. The mounting plate has a U-shaped cross section, one end of the mounting plate contacts the mounting surface, and the other end is limited to the mounting nut.

[0007] In this technical solution, the mounting nut can adjust the tightness. During installation, the fit between the mounting plate and the mounting surface can be adjusted according to the actual situation of the mounting surface to ensure that the mounting plate is tightly fixed on the mounting surface.

[0008] According to one embodiment of the present invention, the stepped boss is divided into a high boss and a low boss. The high boss is used to prevent the wedge-shaped boss on the lock tongue from detaching, and the low boss is used for the lock tongue to rotate unidirectionally within a range of 180° along its surface.

[0009] In this technical solution, on the one hand, the lock tongue needs to be stably maintained in a specific position to achieve the locking function, and on the other hand, it needs to slide along the surface of the short boss when unlocking or changing the state of the lock tongue; the high boss is used to prevent the wedge-shaped boss from easily moving outward or leaving the predetermined track, thereby ensuring that the lock tongue will not retract accidentally; the shape and height of the short boss ensure that the lock tongue can only rotate according to the set 180° one-way path, avoiding excessive rotation or wrong direction of the lock tongue.

[0010] According to one embodiment of the present invention, the spring limiter is located between the shoulder of the inner wall of the lock body and the flange of the lock core, and the spring applies a pre-tightening force to the lock tongue through the lock core; the lock core applies pressure through the front of the key, or the lock core applies tension through the back of the twist handle, so that the wedge-shaped boss of the lock tongue leaves the positioning groove of the lock body, thereby realizing the dual-operation rotation of the lock tongue.

[0011] In this technical solution, the spring applies a pre-tightening force to the lock tongue through the lock core, so that the lock tongue maintains a stable position under normal conditions, ensuring that the lock is in a locked state. When the lock needs to be unlocked, there are two operating methods. One is to apply pressure through the front of the key. After the key is inserted into the lock core, inward pressure is applied to the lock core, compressing the spring. The lock core drives the lock tongue to move, so that the wedge-shaped boss of the lock tongue leaves the positioning groove of the lock body. At this time, the lock tongue can rotate to unlock. The second is to use the back of the twist handle to apply tension. When the twist handle is turned, the twist handle generates an outward pulling force on the lock core, and similarly compresses the spring, driving the lock tongue to move, so that the wedge-shaped boss leaves the positioning groove, and the lock tongue can be rotated to unlock. The dual-operation setting retains the convenience and versatility of traditional key unlocking, and adds the twist handle operation method, providing users with more choices and suitable for different scenarios.

[0012] According to one embodiment of the present invention, the spring is a pre-stressed coil spring, and the compression stroke requirement is: greater than the height of the wedge-shaped boss and less than the height of the high boss, so that after the lock tongue leaves the positioning groove, it is only allowed to rotate along the low boss.

[0013] In this technical solution, the spring compression stroke is greater than the height of the wedge-shaped boss, ensuring that when external force is applied to the lock core, the restoring force generated by the spring compression pushes the lock core to drive the lock tongue to move; only when the compression stroke exceeds the height of the wedge-shaped boss can the wedge-shaped boss of the lock tongue completely break away from the restriction of the positioning groove; and the compression stroke is less than the height of the high boss, which plays a role in limiting the movement range of the lock tongue. When the spring is compressed to a certain extent, the lock tongue moves under the action of the spring elastic force, but because the compression stroke is less than the height of the high boss, the lock tongue will not cross the high boss and can only rotate along the surface of the short boss.

[0014] According to one embodiment of the present invention, the width of the wedge-shaped boss is smaller than the width of the positioning groove, and the height of the wedge-shaped boss ensures that its range of movement is limited to between the positioning groove and the short boss.

[0015] In this technical solution, the width of the wedge-shaped boss is smaller than the width of the positioning groove, and the narrower wedge-shaped boss can be easily inserted into the positioning groove, avoiding malfunctions due to rigid jamming; and the height of the wedge-shaped boss ensures that its range of movement is limited to between the positioning groove and the short boss. When the lock needs to be unlocked, the wedge-shaped boss is moved away from the positioning groove by using a key or a twist handle. Due to the height limitation, it can only rotate in one direction along the surface of the short boss, thereby driving the lock tongue to rotate, realizing the unlocking function, and preventing it from excessive rotation or wrong direction.

[0016] According to one embodiment of the present invention, the locking tongue is limited between the stepped boss and the limiting nut when rotating in the dual-operation mode.

[0017] In this technical solution, during the dual-operation rotation process, the stepped boss and the limit nut effectively limit the lock tongue from different directions. When the lock tongue rotates, the high boss can prevent the lock tongue from excessively rotating and out of the reasonable range, avoiding malfunction or damage to the lock due to excessive rotation; the short boss guides the lock tongue to rotate along a specific 180° one-way path. The limit nut is fixed to the lock core and moves with the lock core, restraining the lock tongue from the other side. The stepped boss and the limit nut cooperate with each other to ensure that the lock tongue can rotate flexibly within the limited range and stop accurately at the desired position during dual-operation rotation. To achieve the above objectives, the present invention also provides an application of a rolling blind.

[0018] An application of a rolling curtain includes a rolling curtain and side slides arranged on both sides of the rolling curtain, a stop rod is provided at the bottom of the back of the side slide, and a tongue lock is provided extending inward along the stop rod, the lock body of the tongue lock is arranged toward the front of the rolling curtain through a mounting plate, and the twist handle of the tongue lock is arranged toward the back of the rolling curtain; the lock tongue of the tongue lock rotates unidirectionally within a range of 180° relative to the lock core, and when the U-shaped groove of the tongue lock rotates to the stop rod, the stop rod falls into the U-shaped groove, the lock tongue stop rod is limited, and the rolling curtain cannot be pulled, thereby achieving the locking of the rolling curtain.

[0019] In this technical solution, the lock body is directed toward the front of the roller shutter through the mounting plate, making it convenient to insert the key from the front; the twist handle is directed toward the back of the roller shutter, making it convenient to unlock and lock the roller shutter from the back, which is in line with daily usage habits. When the roller shutter needs to be locked, the key is turned or the twist handle is twisted to rotate the lock tongue, and its U-shaped groove rotates to the position of the blocking rod, and the blocking rod naturally falls into the U-shaped groove; the blocking rod forms a blockage for the lock tongue, and the fixed lock tongue restricts the movement of the roller shutter. Because the roller shutter and the lock tongue are connected by an integral structure, the lock tongue cannot move, and the roller shutter cannot be pulled, thereby achieving locking. The overall structure of the roller shutter is simple but efficient, utilizing the principle of mechanical limiting, without the need for complex electronic components, low cost and high stability, and can effectively ensure the safety of the roller shutter in the locked state and prevent it from being opened at will.

[0020] According to one embodiment of the present invention, a key is used to drive a lock tongue to be opened or locked at the front of the roller shutter, and a twist handle is used to rotate the lock tongue to open or lock at the back of the roller shutter.

[0021] In this technical solution, two different operating modes are integrated into one lock core, sharing the same lock tongue opening and closing mechanism, simplifying the structure and reducing costs.

[0022] According to one embodiment of the present invention, the size of the mounting plate is adapted to the pull rod of the rolling shutter, and is used to fix the lock body on the pull rod of the rolling shutter.

[0023] In this technical solution, the installation position of the lock body and the rolling shutter is selected on the pull rod, and can also be other positions; the U-shaped setting of the mounting plate matches the pull rod of the rolling shutter for better fixation.

[0024] Compared with the prior art, the present invention has the following beneficial effects: (1) By applying pressure from the front of the key or pulling force from the back of the handle, the lock tongue can be opened by dual-operation rotation. This not only retains the convenience of traditional key opening, but also adds a twist handle operation method, providing users with more choices and suitable for different scenarios.

[0025] (2) The stepped boss of the lock body cooperates with the wedge-shaped boss of the lock tongue, and the spring preload force allows the lock tongue to rotate 180° in one direction to prevent misoperation; the high boss prevents the wedge-shaped boss from detaching, and the low boss guides the one-way rotation, ensuring the stability of the lock tongue and realizing the function of locking the roller shutter in a fixed position. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a perspective view of the present invention.

[0027] Figure 2 It is a cross-sectional view of the present invention.

[0028] Figure 3 It is a three-dimensional diagram of the lock body.

[0029] Figure 4 It is one of the usage state diagrams of the present invention.

[0030] Figure 5 This is the second usage diagram of the present invention.

[0031] Figure 6 This is one of the usage status diagrams of the side slide.

[0032] Figure 7 This is the second diagram of the side slide in use.

[0033] Figure 8 This is the main view of the roller blind.

[0034] Figure 9 This is the rear view of the roller blind.

[0035] In the figure: 1. Lock body; 11. Positioning groove; 12. High boss; 13. Low boss; 14. Lock cylinder; 15. Spring; 2. Gasket; 3. Mounting plate; 4. Mounting nut; 5. Lock tongue; 51. Wedge-shaped boss; 52. U-shaped groove; 6. Limit nut; 7. Twist handle; 8. Limit screw; 9. Side slide; 91. Stop lever. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] Example 1 like Figure 1 and Figure 2 As shown, this embodiment provides a dual-operation anti-misoperation cam lock, including a lock body 1, a lock core 14, a lock tongue 5 and a twist handle 7. One end of the lock core 14 passes through the lock body 1 and is connected to the twist handle 7 at the other end. The lock tongue 5 is fixed in the middle of the lock core 14, wherein: like Figure 3 As shown, the lock body 1 is arranged in a hollow cylindrical shape, the outer end surface of which is expanded and sleeved with a gasket 2, and the inner end surface of which is recessed inward along the center to form a positioning groove 11, and semi-circular stepped bosses of different heights are formed on both sides of the positioning groove 11; The lock core 14 is a solid rod, one side of which is clamped in the lock body 1 by a spring 15, and the other side is fixed to the twist handle 7 by a limit screw 8. The center is provided with a limit nut 6 that cooperates with the lock tongue 5 to fix; like Figure 4 and Figure 5 As shown, the lock tongue 5 is arranged in the shape of a slender plate, one end of which is provided with a mounting hole that cooperates with the lock core 14, and the other end is provided with a U-shaped groove 52 that cooperates with the blocking rod 91; a wedge-shaped boss 51 is provided inside the mounting hole, and the wedge-shaped boss 51 cooperates with the stepped boss to operate.

[0038] like Figures 1 to 5As shown, in this technical solution, a lock body 1 and a twist handle 7 are respectively provided on both sides of the lock cylinder 14, and the double-operation rotary lock tongue 5 is opened or locked on the front and back sides; the lock body 1 has a stepped boss, and the lock tongue 5 has a wedge-shaped boss 51, which cooperates with the preload force of the spring 15 to realize one-way rotation of the lock tongue 5, which can effectively prevent misoperation; the lock tongue 5 also has a U-shaped groove 52 for cooperating with the locking to ensure one-way rotation within a 180° range. Specifically, the positioning groove 11 on the inner side of the lock body 1 and the high and low stepped bosses provide guidance and limitation for the lock core 14; the spring 15 is clamped to make the lock core 14 have elastic reset ability, the limit screw 8 is connected to the twist handle 7 to realize the rotational force transmission, and the limit nut 6 fixes the position of the lock tongue 5; the lock tongue 5 is slender and plate-shaped, matching the mounting hole and the U-shaped groove 52, and the wedge-shaped boss 51 and the stepped boss in the mounting hole are used to prevent misoperation. When the lock core 14 rotates, the wedge-shaped boss 51 needs to pass through in a specific height step sequence. If the operation is improper, the wedge-shaped boss 51 will be blocked by the higher step, and the unlocking or locking action cannot be completed, effectively preventing misoperation; at the same time, the U-shaped groove 52 cooperates with the blocking rod 91 to ensure that the lock tongue 5 can realize the opening and closing function of the lock under correct operation. The overall structure is compact and achieves the effect of locking in a fixed position.

[0039] In addition, the dual-operation anti-misoperation cam lock according to the present invention also has the following additional technical features: According to one embodiment of the present invention, a mounting plate 3 and a mounting nut 4 are provided on the outside of the lock body 1 . The mounting plate 3 has a U-shaped cross section, one side of the mounting plate 3 contacts the mounting surface, and the other end is limited by the mounting nut 4 .

[0040] In this technical solution, the mounting nut 4 can adjust the tightness. During installation, the fit between the mounting plate 3 and the mounting surface can be adjusted according to the actual situation of the mounting surface to ensure that the mounting plate 3 is tightly fixed on the mounting surface.

[0041] According to one embodiment of the present invention, the stepped boss is divided into a high boss 12 and a low boss 13. The high boss 12 is used to prevent the wedge-shaped boss 51 on the lock tongue 5 from detaching, and the low boss 13 is used for the lock tongue 5 to perform a unidirectional rotation of 180° along its surface.

[0042] In this technical solution, on the one hand, the lock tongue 5 needs to be stably maintained in a specific position to realize the locking function, and on the other hand, it needs to slide along the surface of the short boss 13 when unlocking or changing the state of the lock tongue 5; the high boss 12 is used to prevent the wedge-shaped boss 51 from easily moving outward or deviating from the predetermined track, thereby ensuring that the lock tongue 5 will not retract accidentally; the shape and height of the short boss 13 ensure that the lock tongue 5 can only rotate according to the set 180° one-way path, avoiding excessive rotation or wrong direction of the lock tongue 5.

[0043] According to one embodiment of the present invention, the spring 15 is limited between the inner wall shoulder of the lock body 1 and the flange of the lock core 14, and the spring 15 applies a pre-tightening force to the lock tongue 5 through the lock core 14; the lock core 14 applies pressure through the front of the key, or the lock core 14 applies tension through the back of the twist handle 7, so that the wedge-shaped boss 51 of the lock tongue 5 leaves the positioning groove 11 of the lock body 1, thereby realizing the dual-operation rotation of the lock tongue 5.

[0044] In this technical solution, the spring 15 applies a pre-tightening force to the lock tongue 5 through the lock core 14, so that the lock tongue 5 maintains a stable position under normal conditions, ensuring that the lock is in a locked state. When unlocking is required, there are two operating methods. One is to apply pressure from the front of the key. After the key is inserted into the lock core 14, inward pressure is applied to the lock core 14, compressing the spring 15. The lock core 14 drives the lock tongue 5 to move, so that the wedge-shaped boss 51 of the lock tongue 5 leaves the positioning groove 11 of the lock body 1. At this time, the lock tongue 5 can rotate to unlock. The second is to use the back of the twist handle 7 to apply a pulling force. When the twist handle 7 is turned, the twist handle 7 generates an outward pulling force on the lock core 14. Similarly, the spring 15 is compressed, driving the lock tongue 5 to move, so that the wedge-shaped boss 51 leaves the positioning groove 11, and the lock tongue 5 rotates to unlock. The dual-operation setting retains the convenience and versatility of traditional key unlocking, and increases the operation method of the twist handle 7, providing users with more choices and suitable for different scenarios.

[0045] According to one embodiment of the present invention, the spring 15 is a pre-stressed coil spring, and the compression stroke requirement is: greater than the height of the wedge-shaped boss 51 and less than the height of the high boss 12, so that after the lock tongue 5 leaves the positioning groove 11, it is only allowed to rotate along the low boss 13.

[0046] In this technical solution, the compression stroke of the spring 15 is greater than the height of the wedge-shaped boss 51, ensuring that when external force is applied to the lock core 14, the restoring force generated by the compression of the spring 15 pushes the lock core 14 to drive the lock tongue 5 to move; only when the compression stroke exceeds the height of the wedge-shaped boss 51, the wedge-shaped boss 51 of the lock tongue 5 can completely break away from the restriction of the positioning groove 11; and the compression stroke is less than the height of the high boss 12, which plays a role in limiting the movement range of the lock tongue 5. When the spring 15 is compressed to a certain extent, the lock tongue 5 moves under the elastic force of the spring 15, but because the compression stroke is less than the height of the high boss 12, the lock tongue 5 will not cross the high boss 12 and can only rotate along the surface of the short boss 13.

[0047] According to one embodiment of the present invention, the width of the wedge-shaped boss 51 is smaller than the width of the positioning groove 11 , and the height of the wedge-shaped boss 51 ensures that its range of movement is limited to between the positioning groove 11 and the short boss 13 .

[0048] In this technical solution, the width of the wedge-shaped boss 51 is smaller than the width of the positioning groove 11. The narrower wedge-shaped boss 51 can be easily inserted into the positioning groove 11 to avoid malfunctions due to rigid jamming; and the height of the wedge-shaped boss 51 ensures that its range of movement is limited to between the positioning groove 11 and the short boss 13. When it is necessary to unlock, the wedge-shaped boss 51 is moved away from the positioning groove 11 by operating the key or the twist handle 7. Due to the height limitation, it can only rotate unidirectionally along the surface of the short boss 13, thereby driving the lock tongue 5 to rotate, realizing the unlocking function, and preventing it from excessive rotation or wrong direction.

[0049] According to one embodiment of the present invention, the locking tongue 5 is limited between the stepped boss and the limiting nut 6 when rotating in the dual-operation mode.

[0050] In this technical solution, during the double-operation rotation process, the stepped boss and the limit nut 6 respectively form effective limits on the lock tongue 5 from different directions. When the lock tongue 5 rotates, the high boss 12 can prevent the lock tongue 5 from excessively rotating and deviating from the reasonable range, thereby avoiding malfunction or damage to the lock due to excessive rotation; the short boss 13 guides the lock tongue 5 to rotate along a specific 180° one-way path. The limit nut 6 is fixed on the lock core 14, and moves with the lock core 14, constraining the lock tongue 5 from the other side. The stepped boss and the limit nut 6 cooperate with each other to ensure that the lock tongue 5 can rotate flexibly within a limited range and stop accurately at the desired position during the double-operation rotation. Example 2 Based on Example 1, Figures 6 to 9 As shown, this embodiment provides an application of a rolling curtain, including a rolling curtain and side slides 9 arranged on both sides of the rolling curtain, a stop rod 91 is provided at the bottom of the back of the side slide 9, and a tongue lock is provided extending inward along the stop rod, and the lock body 1 of the tongue lock is arranged toward the front of the rolling curtain through the mounting plate 3, and the twist handle 7 of the tongue lock is arranged toward the back of the rolling curtain; the lock tongue 5 of the tongue lock is rotated unidirectionally within a range of 180° relative to the lock core 14, and when the U-shaped groove 52 of the tongue lock is rotated to the stop rod 91, the stop rod 91 falls into the U-shaped groove 52, and the lock tongue 5 is limited by the stop rod 91, and the rolling curtain cannot be pulled, thereby achieving the locking of the rolling curtain.

[0051] like Figures 6 to 9As shown, in this technical solution, the lock body 1 is oriented toward the front of the rolling shutter through the mounting plate 3, making it convenient to insert the key from the front; the twist handle 7 is oriented toward the back of the rolling shutter, making it convenient to unlock and lock the shutter from the back, which is in line with daily usage habits. When the rolling shutter needs to be locked, the key or twist handle 7 is turned to rotate the lock tongue 5, and its U-shaped groove 52 is rotated to the position of the baffle 91, and the baffle 91 naturally falls into the U-shaped groove 52; the baffle 91 forms a block to the lock tongue 5, and the fixation of the lock tongue 5 restricts the movement of the rolling shutter. Because the rolling shutter and the lock tongue 5 are connected by an integral structure, the lock tongue 5 cannot move, and the rolling shutter cannot be pulled, thereby achieving locking. The overall structure of the rolling shutter is simple but efficient, utilizing the principle of mechanical limiting, without the need for complex electronic components, low cost and high stability, and can effectively ensure the safety of the rolling shutter in the locked state and prevent it from being opened at will.

[0052] According to one embodiment of the present invention, a key is used to drive the lock tongue 5 to be opened or locked at the front of the roller shutter, and a twist handle 7 is used to rotate the lock tongue 5 to open or lock at the back of the roller shutter.

[0053] In this technical solution, two different operating modes are integrated into one lock core 14, sharing the same set of opening and closing mechanisms of the lock tongue 5, thereby simplifying the structure and reducing costs.

[0054] According to one embodiment of the present invention, the size of the mounting plate 3 is adapted to the pull rod of the rolling shutter, and is used to fix the lock body 1 on the pull rod of the rolling shutter.

[0055] In this technical solution, the installation position of the lock body 1 and the roller shutter is selected on the pull rod, and can also be other positions; the U-shaped setting of the mounting plate 3 cooperates with the pull rod of the roller shutter for better fixation.

[0056] The usage process of the above embodiment is as follows: In the normal locking state, the spring 15 applies a pre-tightening force to the lock tongue 5 through the lock core 14, the wedge-shaped boss 51 is in the positioning groove 11, the lock tongue 5 is stable, and the roller shutter cannot be pulled; There are two ways to unlock the door: if you use a key, insert the lock cylinder 14 from the front and apply pressure, compressing the spring 15, causing the lock cylinder 14 to drive the lock tongue 5 to move, the wedge-shaped boss 51 to leave the positioning groove 11, and rotate 180 degrees along the short boss 13 in a specific order, and the U-shaped groove 52 to turn away from the blocking rod 91, so that the roller shutter can be pulled; if you use the twist handle 7, apply tension from the back, similarly compressing the spring 15, driving the lock tongue 5 to move, the wedge-shaped boss 51 to leave the positioning groove 11, and realizing the rotation unlocking; To lock, reverse the key or twist handle 7 to rotate the lock tongue 5 back. The U-shaped groove 52 rotates to the stopper 91, which then engages, restricting the movement of the lock tongue 5 and locking the roller shutter. The high boss 12 prevents the wedge-shaped boss 51 from disengaging, while the low boss 13 guides unidirectional rotation. The limit nut 6 cooperates with the stepped boss to limit the position and ensure stable operation.

[0057] Although the present invention is described in detail with reference to the accompanying drawings and in combination with preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and such modifications or substitutions shall be within the scope of the present invention. Any person skilled in the art who can easily conceive of changes or substitutions within the technical scope disclosed in the present invention shall be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope of protection of the claims.

Claims

1. A dual-operation anti-misoperation cam lock, characterized in that: The invention comprises a lock body (1), a lock core (14), a lock tongue (5) and a twist handle (7), wherein one end of the lock core (14) passes through the lock body (1) and is connected to the twist handle (7) at the other end, and a lock tongue (5) is fixed in the middle of the lock core (14), wherein: The lock body (1) is arranged in a hollow columnar shape, the outer end surface of which is enlarged and sleeved with a gasket (2), and the inner end surface of which is recessed inward along the center to form a positioning groove (11), and semi-circular stepped bosses of different heights are formed on both sides of the positioning groove (11); The lock core (14) is in the shape of a solid rod, one side of which is clamped in the lock body (1) by a spring (15), and the other side of which is fixedly connected to the twist handle (7) by a limit screw (8), and a limit nut (6) is provided in the middle thereof for fixing with the lock tongue (5); The lock tongue (5) is in the shape of an elongated plate, one end of which is provided with a mounting hole for cooperating with the lock core (14), and the other end of which is provided with a U-shaped groove (52) for cooperating with the blocking rod (91); a wedge-shaped boss (51) is provided inside the mounting hole, and the wedge-shaped boss (51) cooperates with the stepped boss to perform a movement.

2. The dual-operation anti-misoperation cam lock according to claim 1, characterized in that: A mounting plate (3) and a mounting nut (4) are provided on the outside of the lock body (1); the mounting plate (3) has a U-shaped cross section; one end of the mounting plate (3) contacts the mounting surface, and the other end is limited to the mounting nut (4).

3. The dual-operation anti-misoperation cam lock according to claim 1, characterized in that: The stepped boss is divided into a high boss (12) and a low boss (13). The high boss (12) is used to prevent the wedge-shaped boss (51) on the lock tongue (5) from detaching, and the low boss (13) is used to allow the lock tongue (5) to perform a 180° one-way rotation along its surface.

4. The dual-operation anti-misoperation cam lock according to claim 2, characterized in that: The spring (15) is limited between the inner wall shoulder of the lock body (1) and the flange of the lock core (14), and the spring (15) applies a pre-tightening force to the lock tongue (5) through the lock core (14); the lock core (14) applies pressure through the front of the key, or the lock core (14) applies tension through the back of the twist handle (7), so that the wedge-shaped boss (51) of the lock tongue (5) leaves the positioning groove (11) of the lock body (1), thereby realizing the double-operation rotation of the lock tongue (5).

5. The dual-operation anti-misoperation cam lock according to claim 4, characterized in that: The spring (15) is a pre-stressed coil spring, and the compression stroke requirement is: greater than the height of the wedge-shaped boss (51) and less than the height of the high boss (12), so that after the lock tongue (5) leaves the positioning groove (11), it is only allowed to rotate along the low boss (13).

6. The dual-operation anti-misoperation cam lock according to claim 4, characterized in that: The width of the wedge-shaped boss (51) is smaller than the width of the positioning groove (11), and the height of the wedge-shaped boss (51) ensures that its range of movement is limited to between the positioning groove (11) and the short boss (13).

7. The dual-operation anti-misoperation cam lock according to claim 1, characterized in that: The locking tongue (5) is limited between the stepped boss and the limiting nut (6) when the locking tongue (5) is rotated in a dual-operation mode.

8. An application of a rolling shutter, using the dual-operation anti-misoperation cam lock according to any one of claims 1 to 7, characterized in that: The invention comprises a rolling curtain and side slides (9) arranged on both sides of the rolling curtain, a stop rod (91) is arranged at the bottom of the back of the side slide (9), and a tongue lock is arranged extending inwardly along the stop rod, a lock body (1) of the tongue lock is arranged toward the front of the rolling curtain through a mounting plate (3), and a twist handle (7) of the tongue lock is arranged toward the back of the rolling curtain; the lock tongue (5) of the tongue lock is unidirectionally rotated within a range of 180 degrees relative to the lock core (14), and when the U-shaped groove (52) of the tongue lock is rotated to the stop rod (91), the stop rod (91) falls into the U-shaped groove (52), and the lock tongue (5) is limited by the stop rod (91), and the rolling curtain cannot be pulled, thereby achieving the locking of the rolling curtain.

9. Use of the roller blind according to claim 8, characterized in that: The front side of the rolling curtain is driven by a key to drive the lock tongue (5) to be opened or locked, and the back side of the rolling curtain is driven by a twist handle (7) to rotate and drive the lock tongue (5) to be opened or locked.

10. Use of the roller blind according to claim 8, characterized in that: The size of the mounting plate (3) is adapted to the pull rod of the rolling shutter, and is used to fix the lock body (1) on the pull rod of the rolling shutter.

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