Mechanical lock and movement mechanism

Abstract

The application discloses a mechanical lock and a movement mechanism, and belongs to the field of mechanical equipment. The mechanical lock comprises a sleeve, a lock core, a reset member and a first trigger member. The sleeve wall has a guide groove. The first end of the lock core is located in the sleeve, the second end is located outside the sleeve, and the lock core can be extended and contracted relative to the sleeve. The reset member is located in the guide groove and extends relative to the sleeve wall. The reset member is connected with the lock core and can move along the guide groove to cooperate with the guide groove to lock the lock core. The first trigger member is located outside the sleeve and close to the second end of the lock core, and is connected with the lock core to drive the lock core to rotate under the action of external force to release the lock. The lock core is configured to move outward after the lock is released, so that the length of the lock core extending relative to the sleeve is increased. After the lock core is elongated, the lock core is used to contact a movement member to lock the movement member.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the field of mechanical equipment, and in particular, to a mechanical lock and a movement mechanism. BACKGROUND

[0002] Movement mechanisms exist in many mechanical devices, and the movement forms that can be achieved by movement mechanisms in different mechanical devices are also different. Common movement forms include linear movement, rotational movement, and combined movement.

[0003] When a moving part in a movement mechanism moves to a predetermined position, it is usually necessary to lock the moving part to stop the movement mechanism, and then unlock the moving part after a period of time to restore the movement. In some mechanical devices, in order to improve the safety and stability of the mechanical device, the locking and unlocking of the moving part are manually operated. However, the reliability is low and there is a certain risk. SUMMARY

[0004] The present application provides a mechanical lock and a movement mechanism, which has high reliability and is conducive to reducing the risk of movement mechanism operation. The technical solution is as follows:

[0005] In a first aspect, a mechanical lock is provided, which includes a sleeve, a lock core, a reset part, and a first trigger part. The sleeve has a guide groove in the wall, which is used to limit the movement path of the structure located therein. The lock core is inserted into the sleeve, the first end of the lock core is located in the sleeve, the second end is located outside the sleeve, and the lock core can be extended and retracted relative to the sleeve. The reset part is located in the guide groove and extends relative to the wall of the sleeve. The reset part is connected to the lock core and can move along the guide groove. The reset part is used to cooperate with the guide groove to lock the lock core, so that the lock core cannot move axially relative to the sleeve. The first trigger part is located outside the sleeve and close to the second end of the lock core. The first trigger part is connected to the lock core and is used to rotate the lock core under the action of external force to release the lock. The lock core is configured to move outward after releasing the lock, so that the length of the lock core extending relative to the sleeve increases.

[0006] Based on the above features, the mechanical lock is applied to a movement mechanism, and the movement of a moving part in the movement mechanism is used to trigger the first trigger part, so that when the moving part moves to a set position, the lock core is unlocked. After the lock core is unlocked, it moves outward from the sleeve. After the lock core is extended, the lock core is in contact with the moving part to lock the moving part, for example, the lock core extends into the locking hole provided on the moving part, so that the moving part cannot continue to move. Since the first trigger part is triggered directly by the moving part, manual triggering is not required, so the reliability is high. The lock core can lock the moving part every time the moving part moves to a set position. Since the reset part is connected to the lock core and extends relative to the pipe wall of the sleeve, after the moving part is locked, the lock core can be pulled from the outside of the sleeve through the reset part to re-lock the lock core, so that the lock core is retracted and separated from the moving part, achieving the purpose of manual unlocking and avoiding false unlocking.

[0007] In some examples, the guide groove includes a guide section and a locking section. The guide section extends along the length direction of the sleeve. The locking section is located at one end of the guide section away from the first trigger part and is connected to the guide section. The locking section is at an angle to the guide section. For example, the locking section is perpendicular to the guide section. When the reset part is located in the locking section, the lock core is locked. When the reset part is located in the guide section, the lock core is unlocked.

[0008] Based on the above features, when the reset part is located in the locking section, the reset part can abut against the side wall of the locking section, thereby limiting the axial movement of the lock core and locking the lock core. When the reset part moves to the guide section with the rotation of the lock core, the lock core is unlocked, and the lock core can move axially, i.e., can be extended and retracted relative to the sleeve.

[0009] Optionally, the middle part of the locking section is connected to the guide section, or one end of the locking section is connected to the guide section. When the middle part of the locking section is connected to the guide section, the reset part can lock the lock core at both ends of the locking section. When one end of the locking section is connected to the guide section, the reset part can lock the lock core at the end of the locking section away from the guide section.

[0010] In other examples, the guide groove extends along the length direction of the sleeve, and the side wall of the guide groove has a stop protrusion. When the reset part is located at one side of the stop protrusion away from the first trigger part, the lock core is locked. When the reset part is located at the other side of the stop protrusion close to the first trigger part, the lock core is unlocked.

[0011] Based on the above features, when the reset member is located at the side of the stop protrusion away from the first trigger member, the reset member abuts against the stop protrusion, and under the support of the stop protrusion, the lock cylinder cannot move axially relative to the sleeve, so as to lock the lock cylinder. When the reset member moves to the side of the stop protrusion close to the first trigger member along with the lock cylinder, the reset member loses the support of the stop protrusion, so as to unlock the lock cylinder.

[0012] Optionally, the side of the stop protrusion away from the first trigger member is a plane, and the plane is perpendicular to the length direction of the sleeve. The side close to the first trigger member is a slope, and the slope forms an acute angle with the length direction of the sleeve.

[0013] Based on the above features, the plane is perpendicular to the extension direction of the guide groove. When the reset member is located at the side of the stop protrusion away from the first trigger member, the support force provided by the plane is along the extension direction of the guide groove, so that the lock cylinder can be locked more stably. After the lock cylinder is unlocked, when the lock cylinder is locked again, the slope can play a guiding role, so that the reset member can pass the stop protrusion and reach the side of the stop protrusion away from the first trigger member.

[0014] As an example, the sleeve has two guide grooves, and the two guide grooves are rotationally symmetrical about the axis of the sleeve. The reset member is in the form of a rod, and the reset member is located in the two guide grooves and has two ends located outside the sleeve. Based on the above features, the two ends of the reset member extend out of the two guide grooves, and the lock cylinder can be locked more stably. After unlocking, the two ends of the reset member can also be used to apply force when the lock cylinder is locked again, and the operation is more convenient.

[0015] In some examples, the first trigger member includes a connecting ring and a trigger rod. The trigger rod is arranged outside the connecting ring along the radial direction of the connecting ring and is connected to the connecting ring. The connecting ring is sleeved outside the lock cylinder and is fixed to the lock cylinder. By arranging the connecting ring, the trigger rod is connected to the lock cylinder, and the installation of the trigger rod is facilitated.

[0016] In some examples, the mechanical lock further includes an elastic member located in the sleeve. The elastic member is used to provide an action force to the lock cylinder to move outwardly relative to the sleeve.

[0017] In the absence of the elastic member, the force for moving the lock cylinder out of the sleeve can be gravity. By providing the elastic member, the lock cylinder can be moved under the action of the elastic member without gravity, making the installation direction of the mechanical lock more free, and facilitating the adjustment of the force by the elastic member, such as replacing elastic members with different stiffness coefficients.

[0018] Optionally, the sleeve comprises a stroke sleeve and an end cover, the end cover being located at one end of the stroke sleeve. The end cover is connected with the stroke sleeve. The lock cylinder is inserted at the other end of the stroke sleeve, and the elastic member is located between the lock cylinder and the end cover, and abuts against the lock cylinder.

[0019] Based on the above features, the stroke sleeve is the main part of the sleeve, and the end cover closes one end of the stroke sleeve, so that the elastic member is accommodated between the end cover and the lock cylinder. The elastic member is kept in a compressed state, and one end of the elastic member abuts against the lock cylinder, so that when the lock cylinder is unlocked, the lock cylinder can move out of the sleeve under the elastic force of the elastic member.

[0020] In some examples, the mechanical lock further comprises an elastic force adjusting structure. The elastic force adjusting structure is located at the end of the elastic member away from the lock cylinder and abuts against the elastic member, and the elastic member is used to adjust the distance between the elastic member and the end cover. The elastic force adjusting structure adjusts the distance between the elastic member and the end cover, so as to change the deformation amount of the elastic member, thereby adjusting the elastic force of the elastic member on the lock cylinder.

[0021] As an example, the elastic force adjusting structure comprises a pushing member and an adjusting member. The pushing member is located in the stroke sleeve and between the elastic member and the end cover, and the elastic member abuts against the pushing member. The end cover has a mounting hole, and the adjusting member is inserted into the mounting hole and threadedly connected with the end cover, and the adjusting member abuts against the side of the pushing member away from the elastic member.

[0022] Based on the above features, since the adjusting member is threadedly connected with the mounting hole, screwing the adjusting member can adjust the length of the adjusting member extending into the end cover, thereby adjusting the distance between the pushing member and the end cover and changing the distance between the elastic member and the end cover.

[0023] As another example, the side wall of the stroke sleeve has an adjusting groove extending along the length direction of the stroke sleeve, the side wall of the adjusting groove has a plurality of clamping openings arranged along the length direction of the adjusting groove; the elastic force adjusting structure comprises a pushing member and a sliding block, the pushing member is located in the stroke sleeve and between the elastic member and the end cover, the elastic member abuts against the pushing member, and the sliding block is located in the adjusting groove and selectively arranged in one of the clamping openings and connected with the pushing member.

[0024] Based on the above features, the distance between the pushing member and the end cover can be adjusted by withdrawing the sliding block from the clamping opening, pushing the sliding block along the adjusting groove, and arranging the sliding block in another clamping opening.

[0025] Optionally, the mechanical lock further comprises a flange, the flange is sleeved outside the lock core and connected with the sleeve. The flange is used to connect the mechanical lock with an external structure.

[0026] In a second aspect, a motion mechanism is provided, which comprises a motion member, a mechanical lock and a second trigger member, the mechanical lock is any of the mechanical locks as described in the preceding aspect, the motion member has a locking hole, the mechanical lock and the second trigger member are located on the same side of the motion member, the lock core of the mechanical lock is opposite to the motion member and used to extend into the locking hole after being unlocked to lock the motion member, and the second trigger member is located on one side of the locking hole and connected with the motion member to apply an external force to the first trigger member to make the lock core be unlocked.

[0027] Based on the above features, the motion of the motion member triggers the first trigger member, so that the lock core is unlocked when the motion member moves to a set position. After being unlocked, the lock core moves outwardly relative to the sleeve, and after being elongated, the lock core is locked to the motion member by contacting the motion member, for example, the lock core extends into the locking hole arranged on the motion member to make the motion member unable to continue moving. Since the first trigger member is triggered by directly using the motion member as power, manual triggering is not needed, and thus the reliability is high. The lock core can lock the motion member every time the motion member moves to a set position. Since the reset member is connected with the lock core and extends outwardly relative to the wall of the sleeve, after the motion member is locked, the lock core can be pulled by the reset member from outside the sleeve to re-lock the lock core, so that the lock core is retracted and separated from the motion member, to achieve the purpose of manual unlocking and avoid the situation of false unlocking. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 FIG. 1 is a structural schematic view of a motion member of a motion mechanism provided by an embodiment of the present application;

[0029] Figure 2 is a structural schematic view of a moving part of a moving mechanism provided by an embodiment of the present application;

[0030] Figure 3 is a structural schematic view of a moving mechanism provided by an embodiment of the present application;

[0031] Figure 4 is an assembly structural schematic view of a mechanical lock provided by an embodiment of the present application;

[0032] Figure 5 is a structural schematic view of a lock cylinder being locked provided by an embodiment of the present application;

[0033] Figure 6 is an unlocking process schematic view of a mechanical lock provided by an embodiment of the present application;

[0034] Figure 7 is an unlocking process schematic view of a mechanical lock provided by an embodiment of the present application;

[0035] Figure 8 is a structural schematic view of a sleeve provided by an embodiment of the present application;

[0036] Figure 9 is a structural schematic view of a sleeve provided by an embodiment of the present application;

[0037] Figure 10 is a structural schematic view of a mechanical lock provided by an embodiment of the present application;

[0038] Figure 11 is an assembly schematic view of a lock cylinder and a reset part provided by an embodiment of the present application;

[0039] Figure 12 is a structural schematic view of a mechanical lock provided by an embodiment of the present application;

[0040] Figure 13 is a partial sectional view of a mechanical lock provided by an embodiment of the present application;

[0041] Figure 14 is an assembly schematic view of a spring force adjusting structure provided by an embodiment of the present application;

[0042] Figure 15 is a structural schematic view of a moving mechanism provided by an embodiment of the present application;

[0043] Figure 16 is a moving process schematic view of a moving mechanism provided by an embodiment of the present application;

[0044] Figure 17 is a moving process schematic view of a moving mechanism provided by an embodiment of the present application;

[0045] Figure 18 is a schematic diagram of a movement process of a movement mechanism provided by an embodiment of the present application;

[0046] Figure 19 is a schematic diagram of a movement process of a movement mechanism provided by an embodiment of the present application;

[0047] Figure 20 is a schematic diagram of a movement process of a movement mechanism provided by an embodiment of the present application;

[0048] Figure 21 is a schematic diagram of a structure of a movement mechanism provided by an embodiment of the present application. DETAILED DESCRIPTION

[0049] Movement mechanisms exist in many mechanical devices, and the movement forms that can be achieved by movement mechanisms in different mechanical devices are also different.

[0050] For example, Figure 1 is a schematic diagram of a structure of a movement piece of a movement mechanism provided by an embodiment of the present application. As shown in the figure, Figure 1 when the movement mechanism is in operation, the movement piece 100 reciprocates between position A and position B along the arrow direction shown in the figure, and needs to be locked when moving to position A, stops for a period of time, then is unlocked, moves to position B, moves back to position A again, and is locked again, and so on.

[0051] For another example, Figure 2 is a schematic diagram of a structure of a movement piece of a movement mechanism provided by an embodiment of the present application. As shown in the figure, Figure 2 when the movement mechanism is in operation, the movement piece 100 reciprocates rotationally along the arrow direction shown in the figure. Figure 2 In the figure, a mark 101 is shown on the movement piece 100, which is only for facilitating the display of the rotation of the movement piece 100, and for actual movement mechanisms, this mark can not exist. In the process of the reciprocating rotation of the movement piece 100, the mark 101 reciprocates rotationally between state C and state D with the movement piece 100. When the mark 101 moves to state C with the movement piece 100, it needs to be locked, stops for a period of time, then is unlocked, changes the rotation direction to rotate to state D where the mark 101 arrives, then changes the rotation direction again to rotate to state C where the mark 101 arrives, and the movement piece 100 is locked again, and so on.

[0052] In some mechanical devices, the movement of the movement piece must be strictly in accordance with the set movement mode, otherwise it can cause damage to the mechanical device or product, or even cause a safety accident. For example, Figure 1Taking the moving part shown as an example, the moving part must be locked every time it moves to position A, and it must be locked for a sufficient period of time each time before it can be unlocked. This requires the moving mechanism to have extremely high reliability to ensure that it can lock every time and will not unlock incorrectly. However, if the locking is done manually, there is a possibility of forgetting to operate, thus missing the locking opportunity, which poses a certain safety risk.

[0053] Figure 3 This is a schematic diagram of a motion mechanism provided in an embodiment of this application. Figure 3 As shown, the motion mechanism includes a moving member 100, a mechanical lock 200, and a second trigger 102. The moving member 100 has a locking hole 103, and the mechanical lock 200 and the second trigger 102 are located on the same side of the moving member 100. The second trigger 102 is located on one side of the locking hole 103 and is connected to the moving member 100. The second trigger 102 is used to trigger the mechanical lock 200 to lock the moving member 100.

[0054] Figure 4 This is a schematic diagram of the assembly structure of a mechanical lock provided in an embodiment of this application. Figure 4 As shown, the mechanical lock includes a sleeve 10, a lock cylinder 20, a reset member 30, and a first trigger member 40.

[0055] The sleeve 10 has a guide groove 11a on its wall.

[0056] The first end of the lock cylinder 20 is inserted into the sleeve 10, and the second end of the lock cylinder 20 is located outside the sleeve 10. The lock cylinder 20 and the sleeve 10 can be clearance-fitted, so that the lock cylinder 20 can move relative to the sleeve 10, such as rotating relative to the sleeve 10 and moving axially relative to the sleeve 10.

[0057] The reset member 30 is located in the guide groove 11a and extends relative to the wall of the sleeve 10. The reset member 30 is connected to the lock cylinder 20, allowing it to move relative to the sleeve 10 together with the lock cylinder 20. The reset member 30 engages with the guide groove 11a to lock the lock cylinder 20. When the lock cylinder 20 is locked, the state of the mechanical lock is as follows: Figure 5 As shown.

[0058] The first trigger 40 is located outside the sleeve 10, close to the second end of the lock cylinder 20, and connected to the lock cylinder 20. The first trigger 40 is used to drive the lock cylinder 20 to rotate under the action of external force, so as to release the lock.

[0059] Figures 6-7 This is a schematic diagram illustrating the unlocking process of a mechanical lock according to an embodiment of this application. After the lock cylinder 20 is unlocked, the state of the mechanical lock can be referred to... Figure 7 .like Figure 7 As shown, the lock cylinder 20 is configured to move outward from the sleeve 10 after being unlocked, thereby increasing the length of the lock cylinder 20 extending relative to the sleeve 10.

[0060] The mechanical lock is arranged with the lock core 20 opposite to the moving part 100, the lock core 20 is used to extend into the locking hole 103 of the moving part 100 after being unlocked, and the moving part 100 is locked. The second trigger 102 is used to apply an external force to the first trigger 40, so that the lock core 20 is unlocked.

[0061] The mechanical lock is applied to the moving mechanism, and the movement of the moving part 100 is used to trigger the first trigger 40, so that the lock core 20 is unlocked when the moving part 100 moves to a set position. After being unlocked, the lock core 20 moves out of the sleeve 10, the length of the lock core 20 extending out of the sleeve 10 increases, and after the lock core 20 is extended, the moving part 100 is locked by the contact between the lock core 20 and the moving part 100. Since the first trigger 40 is directly triggered by the moving part 100 to unlock the lock core 20 and lock the moving part 100, manual triggering is not required, and the reliability is high. The lock core 20 can lock the moving part 100 every time the moving part 100 moves to a set position. In addition, the reset part 30 is connected to the lock core 20 and extends out of the wall of the sleeve 10, so that after the moving part 100 is locked, the lock core 20 can be pulled out of the sleeve 10 by the reset part 30, and the lock core 20 is re-locked by the cooperation between the reset part 30 and the guide groove 11a, so that the lock core 20 is retracted and separated from the moving part 100, thereby achieving the purpose of manual unlocking and avoiding the situation of false unlocking.

[0062] As shown in Figure 4 , the mechanical lock further comprises a flange 70, the flange 70 is sleeved outside the lock core 20 and connected to the sleeve 10.

[0063] Exemplarily, the flange 70 is connected to one end of the sleeve 10 by a bolt. By arranging the flange 70, the mechanical lock is fixed to the moving mechanism.

[0064] In other examples, the flange 70 can be welded to the sleeve 10 or integrally formed with the sleeve 10.

[0065] Figure 8 is a structural schematic diagram of a sleeve provided by an embodiment of the present application. As shown in Figure 8 , the guide groove 11a comprises a guide section 111 and a locking section 112. The guide section 111 extends along the length direction of the sleeve 10, and the locking section 112 is located at one end of the guide section 111 away from the first trigger 40 and connected to the guide section 111. The locking section 112 is at an angle with the guide section 111. The angle here can be an acute angle, a right angle or an obtuse angle. When the reset part 30 is located in the locking section 112, the lock core 20 is locked, and when the reset part 30 is located in the guide section 111, the lock core 20 is unlocked.

[0066] The reset member 30 is located in the locking section 112 and can abut against the side wall of the locking section 112, thereby limiting the axial movement of the lock cylinder 20 and locking the lock cylinder 20. Since the reset member 30 is located in the guide groove 11a, the reset member 30 can only move along the guide groove 11a, and the reset member 30 is connected to the lock cylinder 20, thereby limiting the movement of the lock cylinder 20. When the reset member 30 is located in the locking section 112, the axial movement of the lock cylinder 20 is limited, and the lock cylinder 20 is locked. When the reset member 30 rotates with the lock cylinder 20 to the guide section 111, the lock cylinder 20 is unlocked, and the lock cylinder 20 can move axially, that is, can extend relative to the sleeve 10. At this time, the reset member 30 moves along the guide section 111 with the lock cylinder 20.

[0067] In the present example, the locking section 112 is perpendicular to the guide section 111. In this way, when the reset member 30 is located in the locking section 112, the support force of the side wall of the locking section 112 on the reset member 30 is just parallel to the axial direction of the lock cylinder 20, so that the lock cylinder 20 can be more stably locked.

[0068] As shown in Figure 8 , the middle part of the locking section 112 is connected to the guide section 111, that is, when the reset member 30 moves to the connection between the guide section 111 and the locking section 112, the lock cylinder 20 can rotate in both directions to enter the locking section 112 and be locked. After the mechanical lock 200 locks the moving member 100, this arrangement also facilitates relocking the lock cylinder 20 after the lock of the moving member 100 is released. For details, please refer to the relevant description below.

[0069] In other examples, one end of the locking section 112 is connected to the guide section 111, that is, when the reset member 30 moves to the connection between the guide section 111 and the locking section 112, the lock cylinder 20 rotates in one direction to enter the locking section 112.

[0070] Figure 9 is a structural schematic diagram of a sleeve provided by an embodiment of the present application. As shown in Figure 9 , in the sleeve 10, the guide groove 11a extends along the length direction of the sleeve 10, and the side wall of the guide groove 11a has a stop protrusion 113. When the reset member 30 is located on the side of the stop protrusion 113 away from the first trigger member 40, the lock cylinder 20 is locked, and when the reset member 30 is located on the side of the stop protrusion 113 close to the first trigger member 40, the lock cylinder 20 is unlocked.

[0071] The reset member 30 can move in the guide groove 11a along with the movement of the lock cylinder 20. The stop protrusion 113 is used to limit the axial movement of the reset member 30. When the reset member 30 moves to the side of the stop protrusion 113 away from the first trigger member 40, the reset member 30 abuts against the stop protrusion 113, and the lock cylinder 20 cannot move axially relative to the sleeve 10 under the support of the stop protrusion 113, thereby locking the lock cylinder 20. When the reset member 30 moves to the side of the stop protrusion 113 close to the first trigger member 40 along with the lock cylinder 20, the reset member 30 loses the support of the stop protrusion 113, and the lock cylinder 20 is unlocked.

[0072] As an example, Figure 9 In some examples, the guide groove 11a has two stop protrusions 113, which are respectively located on the opposite side walls of the guide groove 11a and oppositely arranged. The distance between the two stop protrusions 113 is greater than the size of the reset member 30, i.e., the distance between the two stop protrusions 113 is sufficient for the reset member 30 to pass through.

[0073] In other examples, the stop protrusion 113 can also be arranged on only one side wall of the guide groove 11a.

[0074] As shown in Figure 9 the side of the stop protrusion 113 away from the first trigger member 40 is a plane 113a, which is perpendicular to the length direction of the sleeve 10. The side of the stop protrusion 113 close to the first trigger member 40 is an inclined plane 113b, which forms an acute angle with the length direction of the sleeve 10.

[0075] The plane 113a is perpendicular to the length direction of the sleeve 10, and the guide groove 11a extends along the length direction of the sleeve 10, i.e., the plane 113a is perpendicular to the extension direction of the guide groove 11a. When the reset member 30 is located on the side of the stop protrusion 113 away from the first trigger member 40, the support force provided by the plane 113a is along the extension direction of the guide groove 11a, so that the lock cylinder 20 can be locked more stably. After the lock cylinder 20 is unlocked, the inclined plane 113b can play a guiding role when the lock cylinder 20 is locked again, so as to facilitate the reset member 30 to pass through the stop protrusion 113 and reach the side of the stop protrusion 113 away from the first trigger member 40.

[0076] Figure 10 FIG. 1 is a structural schematic diagram of a mechanical lock provided by an example of the present application. Figure 10 In some examples, at least the flange 70 is omitted. As shown in Figure 10 the sleeve 10 has two guide grooves 11a, which are rotationally symmetrical about the axis of the sleeve 10. The reset member 30 is rod-shaped, and is located in the two guide grooves 11a and has both ends located outside the sleeve 10.

[0077] By arranging two symmetrical guide grooves 11a, the two ends of the reset member 30 extend from the two guide grooves 11a, and when the lock cylinder 20 is locked, the lock cylinder 20 can be more stable. When the lock cylinder 20 is unlocked, the lock cylinder 20 is reset, and the lock cylinder 20 is locked again, force can also be applied from the two ends of the reset member 30 to pull the lock cylinder 20, and the operation is more convenient.

[0078] Figure 11 is an assembly diagram of the lock cylinder and the reset member provided by the embodiment of the present application. As shown in Figure 11 , the lock cylinder 20 has a plug hole 20a and a locking hole 20b. The plug hole 20a penetrates the lock cylinder 20 along the radial direction of the lock cylinder 20, and the locking hole 20b intersects with the plug hole 20a, for example, the locking hole 20b intersects with the plug hole 20a perpendicularly. The reset member 30 is inserted into the plug hole 20a, and the locking hole 20b can be provided with a locking screw 21. By tightening the locking screw 21, the reset member 30 is clamped by the locking screw 21, so that the reset member 30 and the lock cylinder 20 are firmly connected together.

[0079] As shown in Figure 11 , the reset member 30 has a notch 30a at the middle position in the length direction of the reset member 30. The reset member 30 is inserted into the plug hole 20a, and the notch 30a is opposite to the locking hole 20b. The locking screw 21 can extend into the notch 30a and form a cooperation with the notch 30a, so that the reset member 30 and the lock cylinder 20 are more firmly connected, and the reset member 30 is prevented from being pulled out of the plug hole 20a.

[0080] As shown in Figure 10 , the pipe wall of the sleeve 10 also has a through hole 11b. When the locking hole 20b of the lock cylinder 20 is opposite to the through hole 11b, the plug hole 20a of the lock cylinder 20 is opposite to the guide groove 11a, which is to facilitate the assembly of the mechanical lock. When assembling, the lock cylinder 20 can be inserted into the sleeve 10, and the position of the lock cylinder 20 is adjusted so that the locking hole 20b is opposite to the through hole 11b. Then the reset member 30 is inserted into the plug hole 20a from the guide groove 11a. Then the locking screw 21 is put into the locking hole 20b from the through hole 11b, and the locking screw 21 is tightened from the through hole 11b by using a screwdriver or the like.

[0081] As shown in Figure 4 , the first trigger member 40 includes a connecting ring 41 and a trigger rod 42. The trigger rod 42 is arranged outside the connecting ring 41 along the radial direction of the connecting ring 41 and is connected with the connecting ring 41. The connecting ring 41 is sleeved outside the lock cylinder 20 and is fixed with the lock cylinder 20.

[0082] The trigger rod 42 and the connecting ring 41 can be fixedly connected or detachably connected, for example, through threaded connection. By adopting the detachable connection of the trigger rod 42, different sizes of the trigger rod 42 can be replaced according to different use scenarios.

[0083] The fixing of the connecting ring 41 to the lock cylinder 20 is at least circumferential, meaning that the connecting ring 41 and the lock cylinder 20 cannot rotate relative to each other. The connecting ring 41 and the lock cylinder 20 can be fixed in various ways. For example, they can be connected by a key, such as a flat key or a spline connection. Alternatively, they can be connected by screws, welding, etc. Even an interference fit between the connecting ring 41 and the lock cylinder 20 can achieve the same level of fixation.

[0084] As an example, in this embodiment of the application, the side wall of the lock cylinder 20 is provided with a keyway 20c, and a key 411 is connected to one side of the connecting ring 41. The connecting ring 41 is sleeved on the outside of the lock cylinder 20, and the key 411 is located in the keyway 20c, so that the connecting ring 41 is circumferentially fixed to the lock cylinder 20.

[0085] like Figure 4 As shown, the mechanical lock also includes a baffle 80, which is located at the end of the second end of the lock cylinder 20 and connected to the lock cylinder 20. The baffle 80 is used to provide axial restraint for the connecting ring 41 to prevent the connecting ring 41 from coming off the lock cylinder 20.

[0086] For example, the baffle 80 is connected to the lock cylinder 20 by screws.

[0087] Optionally, the mechanical lock also includes a bushing 90, which is fitted over the lock cylinder 20 and located between the baffle 80 and the connecting ring 41. The bushing 90 is used to fill the axial gap between the baffle 80 and the connecting ring 41, so that when the baffle 80 is installed, the connecting ring 41 can be axially pressed against the baffle 80 by tightening the screws.

[0088] Figure 4 The structure shown is only one example. In other examples, the first trigger rod 42 can also be fixedly connected to the side wall of the lock cylinder 20, for example by welding or threaded connection, thereby eliminating the need for the connecting ring 41, the baffle 80, and the bushing 90.

[0089] In this example, since the connecting ring 41 is fixed to the lock cylinder 20, when the first trigger lever 42 is pushed by an external force, the connecting ring 41 can drive the lock cylinder 20 to rotate, thereby releasing the lock cylinder 20 from its locking position. Figure 5 Taking the structure shown as an example, when the lock cylinder 20 is locked, the reset member 30 is located in the locking section 112 of the guide groove 11a, for example... Figure 5 As shown. During the process of pushing the first trigger lever 42 and causing the lock cylinder 20 to rotate, the reset member 30 moves along the locking section 112 to the connection between the guide section 111 and the locking section 112, enters the guide section 111, and the lock cylinder 20 extends outwards towards the sleeve 10, releasing the lock. For example... Figure 6 and Figure 7 As shown.

[0090] After the lock cylinder 20 is unlocked, the force that allows the lock cylinder 20 to extend outward from the sleeve 10 can be the gravity of the lock cylinder 20. That is, when the mechanical lock is installed, the second end of the lock cylinder 20 faces downward, so that after the lock cylinder 20 is unlocked, it can move outward from the sleeve 10 under the action of gravity.

[0091] Using gravity as the power source for the lock cylinder 20 to move outwards from the sleeve 10 inevitably restricts the installation method. To remove this restriction, allowing for more flexible installation of the mechanical lock and enabling the lock cylinder 20 to move outwards from the sleeve 10 more quickly, the mechanical lock may also include a resilient element 50. The resilient element 50 is located within the sleeve and provides the lock cylinder 20 with the force required to move outwards from the sleeve 10. Thus, after the lock cylinder 20 is unlocked, it can quickly extend outwards from the sleeve 10 under the action of the resilient element 50.

[0092] The elastic element 50 can be a spring, sheet metal, or other structure that provides elastic force. This application uses a spring as an example to illustrate the embodiment of the elastic element 50.

[0093] Figure 12 This is a schematic diagram of a mechanical lock provided in an embodiment of this application. At least a portion of the sidewall of the sleeve 10 and the flange 70 have been removed from the figure. Figure 12 As shown, the sleeve 10 includes a travel sleeve 11 and an end cap 12. The end cap 12 is located at one end of the travel sleeve 11 and is connected to the travel sleeve 11. The lock cylinder 20 is inserted at the other end of the travel sleeve 11, and the elastic element 50 is located between the lock cylinder 20 and the end cap 12. The elastic element 50 at least abuts against the lock cylinder 20.

[0094] The travel sleeve 11 is the main body of the sleeve 10, and the guide groove 11a is located on the side wall of the travel sleeve 11. The end cap 12 closes one end of the travel sleeve 11, so that the elastic element 50 can be accommodated between the end cap 12 and the lock cylinder 20. One end of the elastic element 50 abuts against the lock cylinder 20, and the other end abuts against the end cap 12. The elastic element 50 is kept in a compressed state, so that when the lock cylinder 20 is unlocked, the lock cylinder 20 can move out of the sleeve 10 under the elastic force of the elastic element 50.

[0095] In this embodiment, the end cap 12 and the travel sleeve 11 are detachably connected, for example by bolts, to facilitate the assembly of the mechanical lock. In other examples, the end cap 12 and the travel sleeve 11 may also be fixedly connected, for example by welding, or as an integral structure.

[0096] Figure 13 This is a partial cross-sectional view of a mechanical lock provided in an embodiment of this application. For example... Figure 13 As shown, the mechanical lock also includes a spring adjustment structure 60. The spring adjustment structure 60 is located at the end of the elastic member 50 away from the lock cylinder 20 and abuts against the elastic member 50. The spring adjustment structure 60 is used to adjust the distance between the elastic member 50 and the end cover 12.Figure 13 The image shows a comparison of the elastic adjustment structure 60 before and after adjustment.

[0097] The elastic adjustment structure 60 adjusts the distance between the elastic element 50 and the end cap 12, thereby changing the deformation of the elastic element 50 and adjusting the elastic force of the elastic element 50 on the lock cylinder 20. Increased elastic force of the elastic element 50 on the lock cylinder 20 allows the lock cylinder 20 to extend out of the sleeve 10 more quickly after unlocking. Furthermore, when the lock cylinder 20 is locked, the reset element 30 and the side wall of the locking section 112 are pressed together under the elastic force of the elastic element 50, creating friction. The greater the elastic force of the elastic element 50, the greater the friction, requiring a larger external force to drive the lock cylinder 20 to rotate and unlock via the first trigger element 40. Therefore, it can also adjust the sensitivity of the mechanical lock's triggering, allowing the mechanical lock to adapt to different usage scenarios.

[0098] like Figure 13 As shown, the elastic adjustment structure 60 includes a pusher 61 and an adjuster 62. The pusher 61 is located within the stroke sleeve 11 and between the elastic member 50 and the end cap 12. The elastic member 50 abuts against the pusher 61. The end cap 12 has a mounting hole 12a, into which the adjuster 62 is inserted and threadedly connected. The adjuster 62 abuts against the side of the pusher 61 away from the elastic member 50.

[0099] Since the adjusting member 62 is threadedly connected to the mounting hole 12a, the length of the adjusting member 62 extending into the end cap 12 can be adjusted by screwing on the adjusting member 62, thereby adjusting the distance between the pushing member 61 and the end cap 12, which in turn changes the distance between the elastic member 50 and the end cap 12. Adjusting the adjusting member 62 by screwing on it allows for relatively precise adjustment of the elastic force of the elastic member 50.

[0100] like Figure 13 As shown, the pusher 61 has a support shaft 611 on the side away from the end cap 12, and the elastic member 50 is sleeved on the support shaft 611. For springs, bending deformation may occur during compression. By sleeved on the support shaft 611, the support shaft 611 provides support for the spring, preventing bending deformation of the spring during compression.

[0101] Figure 14 This is an assembly schematic diagram of an elastic adjustment structure provided in an embodiment of this application. Figure 14 As shown in the example, the side wall of the travel sleeve 11 has an adjustment groove 11c, which extends along the length direction of the travel sleeve 11. The side wall of the adjustment groove 11c has multiple latches 11d, which are distributed sequentially along the length direction of the adjustment groove 11c.

[0102] The elastic force adjusting structure 60 comprises a pusher 61 and a slider 63. The pusher 61 is located in the stroke sleeve 11 and between the elastic member 50 and the end cover 12. The elastic member 50 abuts against the pusher 61. The slider 63 is connected with the pusher 61 and is located in the adjusting groove 11c and selectively placed in one of the notches 11d.

[0103] The distance between the pusher 61 and the end cover 12 can be adjusted by taking the slider 63 out of the notch 11d and then pushing the slider 63 along the adjusting groove 11c to place the slider 63 in another notch 11d, so as to adjust the elastic force of the elastic member 50.

[0104] On the wall of the stroke sleeve 11, a mark, such as a character mark or a scale, can be arranged beside each notch 11d to indicate that the slider 63 is located in the corresponding notch 11d and the maximum acting force provided by the elastic member 50. The maximum acting force refers to the force of the elastic member 50 acting on the lock cylinder 20 when the lock cylinder 20 is locked. When the slider 63 has been placed in the notch 11d, the distance between the lock cylinder 20 and the end cover 12 is the smallest, the deformation of the elastic member 50 is the largest, and the force of the elastic member 50 acting on the lock cylinder 20 is the largest. After the lock is released, the distance between the lock cylinder 20 and the end cover 12 increases, the deformation of the elastic member 50 decreases, and the force of the elastic member 50 acting on the lock cylinder 20 decreases.

[0105] Figure 15 is a structural schematic diagram of a movement mechanism provided by an embodiment of the present application. As shown in Figure 15 , the movement mechanism comprises a movement member 100, a second trigger member 102 and any one of the mechanical locks 200 as shown in Figures 4-14 .

[0106] The movement member 100 is a movement component in the movement mechanism, Figure 15 and the structure for driving the movement member 100 to move is omitted. For different mechanical devices, the structure and shape of the movement member 100 in the movement mechanism can be different, Figure 15 and only one is shown in the embodiment.

[0107] As shown in Figure 15 , the movement member 100 has a locking hole 103, the mechanical lock 200 and the second trigger member 102 are located on the same side of the movement member 100, and the lock cylinder 20 of the mechanical lock 200 is opposite to the movement member 100. The lock cylinder 20 of the mechanical lock 200 is used to extend into the locking hole 103 after the lock is released, so as to lock the movement member 100. The second trigger member 102 is located on one side of the locking hole 103 and is connected with the movement member 100. The second trigger member 102 is used to apply an external force to the first trigger member 40, so that the lock cylinder 20 is released.

[0108] The second trigger 102 can be a structure protruding from the surface of the moving member 100, and the height of the protrusion is not less than the vertical distance between the first trigger 40 and the moving member 100. For example, the second trigger 102 can be a bolt connected to the moving member 100. In other examples, it can also be a bump or the like. As long as it can push the first trigger 40.

[0109] Figure 15 In the embodiment, the moving member 100 moves linearly. The reset member 30 cooperates with the guide groove 11a to lock the lock cylinder 20 first. The moving member 100 moves linearly to the position where the second trigger 102 contacts the first trigger 40. Under the driving of the moving member 100, the second trigger 102 pushes the first trigger 40, so that the first trigger 40 drives the lock cylinder 20 to rotate, and the lock cylinder 20 is unlocked. After the lock cylinder 20 is unlocked, it moves out of the sleeve 10, and the length of the lock cylinder 20 extending out of the sleeve 10 increases, so that the moving member 100 is locked in the locking hole 103, and the movement of the moving member 100 is stopped. Then, the lock cylinder 20 is re-locked by manually adjusting the reset member 30, so that the lock cylinder 20 exits the locking hole 103, and the moving member 100 is unlocked. After the moving member 100 is unlocked, it continues to move.

[0110] In some examples, the moving member 100 moves linearly in a reciprocating manner. For example, in combination with Figure 1 As shown in the figure, the moving member 100 moves reciprocally between position A and position B. When it moves to position A, the lock cylinder 20 extends into the locking hole 103 to lock the moving member 100. After the moving member 100 is unlocked, it moves to position B, and then moves from position B to position A again. When it reaches position A, the mechanical lock is triggered again, so that the moving member 100 is locked again, and the reciprocating movement is continued.

[0111] In the embodiment, the guide groove 11a includes a guide section 111 and a locking section 112, and the middle part of the locking section 112 is connected to the guide section 111. The reset member 30 can lock the lock cylinder 20 at both ends of the locking section 112. For the moving mechanism provided with such a mechanical lock, the reset block 104 and the reset protrusion 105 can also be included. The reset block 104 and the mechanical lock 200 are located on the same side of the moving member 100, and the reset block 104 and the second trigger 102 are arranged along the movement direction of the moving member 100. The reset block 104 is connected to the moving member 100, and the reset protrusion 105 is located on the surface of the reset block 104 away from the moving member 100, and the distance between the reset protrusion 105 and the second trigger 102 is greater than the distance between the reset block 104 and the second trigger 102. The distance between the surface of the reset block 104 away from the moving member 100 and the moving member 100 is the same as the vertical distance between the first trigger 40 and the surface of the moving member 100 when the lock cylinder 20 is locked.

[0112] Still takingFigure 15 As shown in the motion mechanism, the mechanical lock 200 is taken as a reference, during the movement of the moving part 100 from position B to position A, the reset part 30 is located at the first end of the locking section 112, i.e. the end close to the second trigger 102. When reaching position A, as shown in Figure 16 As shown, the second trigger 102 pushes the first trigger 40, so that the lock core 20 rotates to the joint of the guiding section 111 and the locking section 112, and the locking is released. As shown in Figure 17 As shown, the lock core 20 extends into the locking hole 103, and the moving part 100 is locked. When the locking of the moving part 100 is released, as shown in Figure 18 As shown, the lock core 20 is pulled out of the locking hole 103 by artificial, and then the lock core 20 is rotated, and the reset part 30 is located at the second end of the locking section 112, i.e. the end close to the reset protrusion 105. As shown in Figure 19 As shown, after the moving part 100 is unlocked, the moving part 100 moves from position A to position B. When the reset protrusion 105 contacts the first trigger 40, as shown in Figure 20 As shown, with the further movement of the moving part 100, the reset protrusion 105 pushes the first trigger 40 to rotate, so as to drive the lock core 20 to rotate, and the reset part 30 moves from the second end of the locking section 112 to the first end. During the process, since the distance from the surface of the reset block 104 to the moving part 100 is the same as the vertical distance from the first trigger 40 to the surface of the moving part 100 when the lock core 20 is locked, the reset block 104 is located between the first trigger 40 and the moving part 100, and supports the first trigger 40, so as to avoid the reset part 30 entering the guiding section 111 when the reset part 30 moves to the joint of the locking section 112 and the guiding section 111. When the moving part 100 moves to position B, the reset part 30 moves to the first end of the locking section 112, and the mechanical lock is reset. The moving direction of the moving part 100 is changed, and the moving part 100 moves from position B to position A.

[0113] Figure 21 It is a structural schematic diagram of a motion mechanism provided by the embodiment of the application. As shown in Figure 21 In this example, the second trigger 102 is also connected to the moving part 100. The locking of the moving part 100 by the mechanical lock and the reset process of the mechanical lock in the motion mechanism can be similar to the motion mechanism shown in Figures 15-20 The difference is only that the movement mode of the moving part 100 is different. Figure 21 In the example shown, the moving part 100 rotates around the axis of the moving part 100, which is the same as the rotating part 100 shown in Figure 2

[0114] ​The terms used in the description of the embodiments of the present application are only used to explain the embodiments of the present application and are not intended to limit the present application. Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be understood as the common meanings to those having ordinary skills in the art to which the present application pertains. The terms "first", "second", "third" and the like used in the description of the present patent application and the claims are not intended to denote any sequence, quantity, or importance, but are only used to distinguish different components. Similarly, the terms "one" or "a" and the like do not denote a quantity limitation, but denote the presence of at least one. The terms "include" or "contain" and the like mean that the elements or objects appearing before the "include" or "contain" cover the elements or objects listed after the "include" or "contain" and their equivalents, and do not exclude other elements or objects. The terms "connected" or "connected" and the like are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships may also be changed accordingly.

[0115] The above is only one embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A mechanical lock, characterized in that, The lock cylinder (10), the lock core (20), the reset member (30) and the first trigger member (40) are provided. The pipe wall of the lock cylinder (10) has a guide groove (11a). The first end of the lock core (20) is located in the lock cylinder (10), the second end is located outside the lock cylinder (10), and the lock core (20) can be extended and contracted relative to the lock cylinder (10). The reset member (30) is located in the guide groove (11a) and extends relative to the pipe wall of the lock cylinder (10), the reset member (30) is connected with the lock core (20) and can move along the guide groove (11a), so as to cooperate with the guide groove (11a) to lock the lock core (20). The first trigger member (40) is located outside the lock cylinder (10) and close to the second end of the lock core (20), and is connected with the lock core (20) to drive the lock core (20) to rotate under the action of external force to release the lock. The lock core (20) is configured to move outwardly to the lock cylinder (10) after releasing the lock, so that the length of the lock core (20) extending out of the lock cylinder (10) increases.

2. The mechanical lock of claim 1, wherein, The guide groove (11a) includes a guide section (111) and a locking section (112), the guide section (111) extends along the length direction of the lock cylinder (10), the locking section (112) is located at one end of the guide section (111) away from the first trigger member (40) and is connected with the guide section (111), the locking section (112) is at an angle with the guide section (111), when the reset member (30) is located in the locking section (112), the lock core (20) is locked, and when the reset member (30) is located in the guide section (111), the lock core (20) is released.

3. The mechanical lock of claim 2, wherein, The middle part or one end of the locking section (112) is connected with the guide section (111).

4. Mechanical lock according to claim 2 or 3, characterized in that The locking section (112) is perpendicular to the guide section (111).

5. The mechanical lock of claim 1, wherein, The guide groove (11a) extends along the length direction of the lock cylinder (10), the side wall of the guide groove (11a) has a stop protrusion (113), when the reset member (30) is located at one side of the stop protrusion (113) away from the first trigger member (40), the lock core (20) is locked, and when the reset member (30) is located at one side of the stop protrusion (113) close to the first trigger member (40), the lock core (20) is released.

6. The mechanical lock of claim 5, wherein, The side surface of the stop protrusion (113) away from the first trigger member (40) is a plane (113a), the plane (113a) is perpendicular to the length direction of the lock cylinder (10), and the side surface close to the first trigger member (40) is an inclined surface (113b), the angle between the inclined surface (113b) and the length direction of the lock cylinder (10) is an acute angle.

7. The mechanical lock according to any one of claims 1 to 6, characterized in that The lock cylinder (10) has two guide grooves (11a), and the two guide grooves (11a) are rotationally symmetrical about the axis of the lock cylinder (10). The reset member (30) is rod-shaped, and the reset member (30) is located in the two guide grooves (11a) and both ends thereof are located outside the lock cylinder (10).

8. The mechanical lock according to any one of claims 1 to 7, characterized in that The first trigger (40) comprises a connecting ring (41) and a trigger rod (42), the trigger rod (42) is arranged outside the connecting ring (41) along the radial direction of the connecting ring (41) and is connected with the connecting ring (41), the connecting ring (41) is sleeved outside the lock core (20) and is fixed with the lock core (20).

9. The mechanical lock according to any one of claims 1 to 8, characterized in that The mechanical lock further comprises a resilient member (50) located in the sleeve (10) for providing an acting force to the lock core (20) to move outwardly of the sleeve (10).

10. The mechanical lock of claim 9, wherein, The sleeve (10) comprises a stroke sleeve (11) and an end cover (12), the end cover (12) is located at one end of the stroke sleeve (11) and is connected with the stroke sleeve (11). The lock core (20) is inserted at the other end of the stroke sleeve (11), the resilient member (50) is located between the lock core (20) and the end cover (12) and abuts against at least the lock core (20).

11. The mechanical lock of claim 10, wherein, Further comprising a spring force adjusting structure (60), the spring force adjusting structure (60) is located at one end of the resilient member (50) away from the lock core (20) and abuts against the resilient member (50) for adjusting the distance between the resilient member (50) and the end cover (12).

12. The mechanical lock of claim 11, wherein, The spring force adjusting structure (60) comprises a pushing member (61) and an adjusting member (62), the pushing member (61) is located in the stroke sleeve (11) and between the resilient member (50) and the end cover (12), the resilient member (50) abuts against the pushing member (61); The end cover (12) has a mounting hole (12a), the adjusting member (62) is inserted in the mounting hole (12a) and is threadedly connected with the end cover (12), the adjusting member (62) abuts against one side of the pushing member (61) away from the resilient member (50).

13. The mechanical lock of claim 11, wherein, The side wall of the stroke sleeve (11) has an adjusting groove (11c), the adjusting groove (11c) extends along the length direction of the stroke sleeve (11), the side wall of the adjusting groove (11c) has a plurality of clamping holes (11d), the plurality of clamping holes (11d) are sequentially distributed along the length direction of the adjusting groove (11c); The spring force adjusting structure (60) comprises a pushing member (61) and a sliding block (63), the pushing member (61) is located in the stroke sleeve (11) and between the resilient member (50) and the end cover (12), the resilient member (50) abuts against the pushing member (61), the sliding block (63) is located in the adjusting groove (11c) and is selectively placed in one of the plurality of clamping holes (11d) and is connected with the pushing member (61).

14. The mechanical lock according to any one of claims 1 to 13, characterized in that Further comprising a flange (70), the flange (70) is sleeved outside the lock core (20) and is connected with the sleeve (10).

15. A motion mechanism characterized by, The application relates to a lock device comprising a moving part (100), a mechanical lock (200) and a second trigger part (102), wherein the mechanical lock (200) is as claimed in any one of claims 1 to 14, the moving part (100) has a locking hole (103), the mechanical lock (200) and the second trigger part (102) are located on the same side of the moving part (100), the lock core (20) of the mechanical lock (200) is opposite to the moving part (100) and is used for extending into the locking hole (103) after being unlocked to lock the moving part (100), and the second trigger part (102) is located on one side of the locking hole (103) and is connected with the moving part (100) and is used for applying external force to the first trigger part (40) to make the lock core (20) be unlocked.

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