Ignition switch lock capable of being started without key and with key

Abstract

The ignition switch lock comprises a lock body, a lock cylinder linkage assembly, a rotary knob and an end cover, the lock cylinder linkage assembly comprises a lock cylinder and a lock cylinder sleeve arranged on the periphery of the lock cylinder in a sleeved mode, the lock body is provided with a rotor switch, a driving piece and a spring bolt, an electromagnetic controller with a pin shaft is arranged on the lock body, a pin shaft groove is formed in the peripheral face of the lock cylinder sleeve, and the rotary knob is arranged in the pin shaft groove. The pin shaft groove is communicated with a guide hole, a pushing piece is arranged in the guide hole, a linkage structure is arranged between the lock cylinder and the lock cylinder sleeve, after a key is inserted, the lock cylinder can move in the axis direction of the lock cylinder sleeve through the linkage structure and extrude the pushing piece to move in the axis direction of the guide hole, and meanwhile the pushing piece can push the pin shaft to retreat from the pin shaft groove. The ignition switch lock has the advantages that the ignition switch lock can be started without a key or with the key, operation convenience is improved, friction force and abrasion are reduced, meanwhile, the key can be pulled out at all gears, and in principle, the key cannot be pulled out at the ON gear.

Description

Technical Field

[0001] The utility model specifically relates to an ignition switch lock for keyless and keyed ignition. Background Technique

[0002] The ignition switch of the keyless system is applicable to the ignition, flameout and anti-theft of motorcycles and electric vehicles. This ignition switch has the three basic functions of "ON, OFF, LOCK" required by the complete vehicle like traditional similar products. However, the keyless system has defects. When the relay that receives the electronic signal fails, the motorcycle cannot be started, and at this time, the key cannot be inserted into the lock core to start either. So, there appears an ignition switch that combines keyless start and keyed start.

[0003] For example, the Chinese utility model patent with the publication number of "CN218447690U" discloses an ignition switch lock that can be started without a key and with a key. The main structure includes a lock body, a pin shaft, a knob, a lock core linkage assembly and a rotating shaft. The lock core linkage assembly consists of a lock core and a lock core sleeve sleeved on the outer periphery of the lock core. The blade and the blade hole structure are used in cooperation, and keyless start is realized through the linkage connection between the knob and the lock core sleeve. Among them, a pin groove positioning block is arranged on the outer periphery of the lock core sleeve, and the pin groove positioning block is fixedly connected with the lock core. The design of the pin shaft groove enables the pin shaft to withdraw or insert into the pin shaft groove when the lock core moves axially along the lock core sleeve. A sliding plane is arranged between the lock core and the lock core sleeve to ensure that the two move downward synchronously and to promote the lock core to rotate with the lock core sleeve when the pin shaft withdraws from the pin shaft groove. In addition, a rotor switch, a driving piece and a lock tongue are also arranged on the lock body, and the rotating shaft controls the expansion and contraction of the lock tongue through the driving piece. The whole design not only ensures the convenience of operation, but also improves the safety and reliability of the ignition switch lock.

[0004] However, the above ignition switch lock still has the following defects:

[0005] Combined with the content disclosed in paragraphs 0053 and 0058 of the specification of this published document, it can be known that when the lock core moves along the axis direction of the lock core sleeve, it will drive the pin groove positioning block to rotate synchronously. Therefore, during the process of keyed start or locking the front of the vehicle, not only the friction between the lock core and the lock core sleeve needs to be overcome (and the contact area between the pin groove positioning block and the lock core sleeve is large, and this frictional resistance is large), but also the friction between the pin groove positioning block and the lock core sleeve and the friction between the pin groove positioning block and the pin shaft need to be overcome. Therefore, a relatively large force needs to be applied during the process of turning the key for ignition, which greatly affects the operation feel.

[0006] Further, combined with the attached Figure 5 、 6, 7 can clearly show the structures of the pin slot positioning block, the lock core, and the lock core sleeve and their assembly relationship. To meet the working requirements of each gear of the ignition lock, multiple groups of inclined surfaces must be provided on the surface of the pin slot positioning block and arranged in a certain shape and direction. The processing of the special-shaped pin slot positioning block is relatively difficult, and at the same time, the cost of the ignition switch lock is increased. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide an ignition switch lock for keyless and keyed start-up aiming at the deficiencies of the above-mentioned existing technologies, improving the operation convenience, reducing the friction and wear, and at the same time enabling the key to be pulled out in each gear.

[0008] To achieve the above object, this utility model provides the following technical solution: An ignition switch lock for keyless and keyed start-up, including a lock body, a lock core linkage assembly, a knob, and an end cover. The end cover is installed at the end of the lock body. The knob is rotatably arranged on the end cover. The lock core linkage assembly includes a lock core and a lock core sleeve sleeved on the outer periphery of the lock core. A plurality of groups of blades are provided on the lock core. A blade hole structure for the blades to insert is provided on the lock core sleeve. One end of the lock core sleeve is linked with the knob, and the other end is linked with a rotating shaft. The rotating shaft can move along the axis direction of the lock core. A rotor switch is provided at the end position of the lock body on the side away from the lock core sleeve of the rotating shaft. A driving piece and a lock tongue are also provided on the lock body. The driving piece is connected with the lock tongue. The rotating shaft controls the telescopic movement of the lock tongue through the driving piece. An electromagnetic controller with a pin shaft is provided on the lock body. A pin shaft groove is provided on the outer peripheral surface of the lock core sleeve. The unlocking or locking of the lock core sleeve is realized by the pin shaft disengaging from or inserting into the pin shaft groove. It is characterized in that: the pin shaft groove communicates with a guiding hole penetrating through the side wall of the lock core sleeve. The guiding hole is distributed along the direction parallel to the axis of the pin shaft, and a pushing member is arranged in the guiding hole. A linkage structure is provided between the lock core and the lock core sleeve. When the key is inserted, the lock core can move along the axis direction of the lock core sleeve through the linkage structure and squeeze the pushing member to move along the axis direction of the guiding hole. At the same time, the pushing member can push the pin shaft out of the pin shaft groove.

[0009] The technical solution has the following advantages: 1. When the key is inserted into the lock cylinder and the lock cylinder is pressed along the axis of the lock cylinder, due to the linkage structure, the lock cylinder moves axially relative to the lock cylinder sleeve. During the movement, the pushing member is squeezed, and the pushing member further drives the pin shaft to move until the pin shaft exits the pin shaft groove. Then, the knob can be rotated. The knob will drive the lock cylinder sleeve to rotate. Since the lock cylinder sleeve is directly linked to the rotating shaft, the rotating shaft rotates to start the ignition, or the lock cylinder can be directly rotated. Due to the linkage structure, the lock cylinder will drive the lock cylinder sleeve to rotate, and then drive the rotating shaft to rotate, and the ignition can also be carried out. When the lock cylinder is reset and the key is removed, since the electromagnetic controller is equipped with a spring, the pin shaft will automatically reset, and the pushing member corresponding to the pin shaft will also automatically reset. Compared with the prior art, the pushing member replaces the pin slot positioning block, and the volume of the pushing member can be designed to be smaller. The friction force is smaller than the sum of the friction forces between the pin slot positioning block and the lock cylinder sleeve and between the pin slot positioning block and the pin shaft. The customer experience is improved. Further, the relationship between the pushing member and the pin shaft is a pushing relationship, rather than a friction relationship between the pin slot positioning block and the pin shaft. Therefore, the wear between the pushing member and the pin shaft is also smaller, and the service life is longer. 2. It is possible to remove the key in each gear (in principle, the key cannot be removed in the ON gear). By using the linkage structure, the lock cylinder and the lock cylinder sleeve can slide relative to each other along the axis of the lock cylinder sleeve (or the lock cylinder), and at the same time, the lock cylinder and the lock cylinder sleeve can rotate synchronously. Therefore, during the gear shifting process, the blades on the lock cylinder and the blade hole structure are always in the same direction. Once the lock cylinder moves upward relative to the lock cylinder sleeve until the blade of the blade and blade hole structure corresponds to the blade hole position, the key can be removed. It should be noted that since the ignition switch lock usually has multiple gears, such as the ignition gear and the ignition-off gear, a set of pin shaft grooves is provided at each gear, and a set of pushing members is installed in each set of pin shaft grooves. No matter which set of pin shaft grooves the pin shaft is inserted into, during the axial movement of the lock cylinder along the lock cylinder sleeve, the pushing members that are not linked to the pin shaft will also be pushed, and will not interfere with the axial movement of the lock cylinder.

[0010] The above ignition switch lock with keyless and keyed start can be further set as follows: The linkage structure includes a first sliding plane and a second sliding plane. The lock cylinder sleeve is provided with a lock cylinder mounting hole distributed along its own axis. The first sliding plane is arranged on the inner wall of the lock cylinder mounting hole and is arranged axially along the lock cylinder mounting hole. The second sliding plane is arranged on the outer circumference of the lock cylinder, and when the lock cylinder and the lock cylinder sleeve are installed, the first sliding plane and the second sliding plane are in corresponding positions.

[0011] With the above technical solution, the linkage structure is designed as a first sliding plane and a second sliding plane, enabling the key to be pulled out in each gear position. During the process of changing gears, neither the lock core nor the blade is stressed, protecting the lock core and the blade and extending their service life. The specific explanation is as follows: A first sliding plane is provided in the lock core mounting hole, and a corresponding second sliding plane is provided on the lock core, enabling the lock core to slide axially relative to the lock core sleeve. At the same time, the lock core sleeve and the lock core can rotate synchronously. Therefore, the blade hole of the blade hole structure on the lock core sleeve and the blade are always in the same direction and will not shift relative to each other circumferentially on the lock core sleeve or the lock core. Thus, the key can be pulled out in any gear position, enriching the functions of the ignition switch. Due to the provision of the first sliding plane and the second sliding plane, the lock core sleeve and the lock core can rotate synchronously, but they will not slide relative to each other circumferentially. When changing gears, the lock core sleeve and the lock core need to rotate synchronously. Therefore, the first sliding plane and the second sliding plane bear the torsion force. During the process of changing gears, neither the lock core nor the blade is stressed, protecting the lock core and the blade and extending their service life. The locking of the blade mainly relies on the block between the blade and the blade hole. Due to the circumferential limitation of the first sliding plane and the second sliding plane, it will not rotate circumferentially, that is, no torsion force is generated.

[0012] The above ignition switch lock with keyless and keyed start can be further configured as follows: A counterbore is provided between the guide hole and the pin shaft groove. The inner diameter of the counterbore is larger than the inner diameter of the guide hole. The pushing member includes a guide rod that is slidably engaged with the guide hole. One end of the guide rod is connected with a cap body that is slidably engaged with the counterbore. The outer diameter of the cap body is larger than the outer diameter of the guide rod. A first inclined surface is provided at the other end of the guide rod or the end of the lock core.

[0013] With the above technical solution, the counterbore and the cap body are designed so that when the pushing member moves under the push of the pin shaft, the pushing member will not slide out of the guide hole. The guide rod and the guide hole are designed to ensure that the moving track of the pushing member is unique, improving the moving stability of the pushing member and enabling it to accurately correspond to the pin shaft. The first inclined surface is further designed to improve the smoothness of the movement between the lock core and the pushing member and prevent jamming.

[0014] The above keyless and key-start ignition switch lock can be further set as follows: the lock core is provided with a first mounting hole distributed in a direction perpendicular to the axis of the lock core, a first spring is arranged in the first mounting hole, one end of the first spring abuts against the bottom of the first mounting hole, and the other end abuts and is connected with a steel ball. A first limiting hole is arranged at the inner wall of the lock core sleeve near the end of the knob. When no key is inserted, the steel ball is clamped with the first limiting hole under the push of the first spring; a second limiting hole is arranged at the inner wall of the lock core sleeve, a plug rod is inserted in the second limiting hole, and a strip-shaped groove is arranged on the lock core in a direction parallel to the axis of the lock core. The end of the plug rod away from the second limiting hole is inserted into the strip-shaped groove.

[0015] The first spring, the steel ball and the first limiting hole are designed. When the lock core is reset axially along the lock core sleeve until the steel ball is clamped into the first limiting hole under the push of the first spring, the blade corresponds to the blade hole structure. At this time, the blade can be accurately inserted into the blade groove, and then the key can be pulled out. The second limiting hole, the plug rod and the strip-shaped groove are further designed to limit the maximum moving stroke of the lock core along the axial direction of the lock core sleeve and avoid excessive axial position movement of the lock core.

[0016] The above keyless and key-start ignition switch lock can be further set as follows: the lock core is provided with a second mounting hole distributed in a direction perpendicular to the axis of the lock core, a limiting member is arranged in the second mounting hole. At the inner wall of the lock core sleeve near the end of the knob, an upward slot and a downward slot are arranged in sequence along the axis of the lock core sleeve. The upward slot is distributed on the side close to the knob. The upward slot and the downward slot are in a stepped shape and the downward slot is close to the central axis direction of the lock core sleeve. One end of the limiting member is provided with a second inclined surface and the other end is in a curved surface. The key is provided with a groove. After the key is inserted and the lock core is pushed along the axis of the lock core sleeve, one end of the limiting member slides from the upward slot to the downward slot, and the other end of the limiting member is clamped with the groove.

[0017] After the key is inserted and during the process of axially pressing the lock core, the limiting member moves from the upward slot to the downward slot. During this process, due to "the upward slot and the downward slot are in a stepped shape and the downward slot is close to the central axis direction of the lock core sleeve", the limiting member will move towards the key. When the limiting member completely enters the downward slot, the other end of the limiting member will be clamped into the groove of the key to limit the key and prevent the key from moving up and down. Among them, "one end of the limiting member is provided with a second inclined surface" to prevent the limiting member from getting stuck during the movement between the upward slot and the downward slot. When the key needs to be pulled out, the lock core is driven to reset, and the limiting member moves from the downward slot to the upward slot. Due to "the upward slot and the downward slot are in a stepped shape and the downward slot is close to the central axis direction of the lock core sleeve" and "the other end of the limiting member is in a curved surface", when pulling out the key, the groove and the limiting member can be smoothly separated, and at the same time, the flat surface of the key will push the limiting member towards the upward slot, and the limiting member will not interfere with the key, so the key can be smoothly pulled out.

[0018] The above keyless and key-start ignition switch lock can be further set as follows: a guide post is connected to the end of the lock core away from the knob, the outer diameter of the guide post is smaller than that of the lock core, a sliding hole adapted to the guide post is provided in the lock core sleeve, guide holes are distributed on the side wall of the sliding hole and the two are communicated, a first inclined surface is distributed at the end of the guide post, and a rounded corner is provided at the end of the guide rod.

[0019] The guide post and the sliding hole are designed to further guide the movement of the lock core, improve the transmission stability between the lock core and the pushing member, and be able to more accurately press the pushing member. At the same time, the design of the sliding hole is beneficial to increasing the wall thickness of the lock core sleeve at the pin shaft groove part, facilitating the machining of the guide hole and the counterbore, and also providing space for the movement of the pushing member.

[0020] The above keyless and key-start ignition switch lock can be further set as follows: the pin shaft groove is arranged as a long groove. When the pin shaft locks the lock core sleeve, the lock core sleeve can move along its own axis direction. A micro switch is provided on the lock body. A third inclined surface is provided at the end of the lock core sleeve away from the knob. The lock core sleeve can contact the contact of the micro switch through the third inclined surface to turn on the micro switch. A second spring capable of driving the lock core sleeve and the rotating shaft to reset is provided in the lock body.

[0021] Adopting the above technical solution, a micro switch is provided in the lock body. Only after the micro switch is triggered and turned on can the electromagnetic controller operate to make the pin shaft disengage from the pin shaft groove. Before rotating the knob, first push the knob into the lock body to drive the lock core sleeve to move. Since the pin shaft groove is arranged as a long groove, the pin shaft groove only restricts the rotation of the lock core sleeve and does not affect the movement of the lock core sleeve. When the lock core sleeve moves, it will contact the contact of the micro switch to turn on the micro switch. Subsequently, under the action of the second spring, it drives the lock core sleeve and the rotating shaft to complete the reset. At this time, rotating the knob can realize keyless start and stop operations. Only by turning on the micro switch first can keyless start be performed, which can effectively avoid various misoperations, such as accidental activation when children are playing, and is safer and more reliable. Among them, the design of the third inclined surface avoids jamming during the process of the lock core sleeve pushing the micro switch.

[0022] The above keyless and key-start ignition switch lock can be further configured as follows: The end cover is provided with a mounting portion sleeved on the lock body. The lock body is provided with a convex block. The mounting portion is provided with an opening for the convex block to be inserted axially. One side of the opening is provided with a card slot formed by the rotation of the mounting portion and the convex block. A backstop structure for limiting the rotation of the mounting portion is further provided between the mounting portion and the lock body. The backstop structure includes a bolt and a slider slidably arranged on the lock body. After the mounting portion is inserted into the lock body and rotated, one end of the slider is inserted axially into the opening of the mounting portion and abuts against the other side of the opening opposite to the card slot, so as to limit the rotation of the mounting portion and the end cover, that is, effectively prevent the convex block from sliding out of the card slot, and further realize the fixed installation of the end cover. In addition, the slider can only linearly slide relative to the lock body under the action of the bolt, and the structure is more stable and reliable.

[0023] With the above technical solution, when the mounting portion of the end cover is axially inserted into the convex block on the lock body, the mounting portion of the end cover first pushes the slider to slide backward, that is, the slider moves in the direction of overcoming the acting force of the third spring. After the mounting portion is inserted into the lock body and rotated, that is, at this time, the convex block on the lock body is engaged into the card slot, one end of the slider is inserted axially into the opening of the mounting portion and abuts against the other side of the opening opposite to the card slot, thereby restricting the rotation of the mounting portion and the end cover, that is, effectively preventing the convex block from sliding out of the card slot, and further realizing the fixed installation of the end cover. In addition, the slider can only linearly slide relative to the lock body under the action of the bolt, and the structure is more stable and reliable.

[0024] The above keyless and key-start ignition switch lock can be further configured as follows: A connecting member is provided between the knob and the lock core sleeve. The outer periphery of the connecting member is provided with several groups of first insertion blocks. Each group of first insertion blocks is correspondingly provided with a group of first slots at the end of the lock core sleeve. The end face of the connecting member facing the knob is provided with several groups of second insertion blocks. Each group of second insertion blocks is correspondingly provided with a group of second slots on the knob. The connecting member and the knob are also detachably connected by screws. The connecting member is provided with a through hole through which the key can pass.

[0025] With the above technical solution, a connecting member is designed to realize a stable connection between the knob and the lock core sleeve. Further, the connecting member limits the lock core, so that the lock core is stably installed in the lock core sleeve.

[0026] The above-mentioned keyless and key-start ignition switch lock can be further configured as follows: the knob includes an inner cover, an outer cover installed outside the inner cover, and a top cover installed on the top of the outer cover, the inner cover is provided with a slide for inserting a key, the outer cover is provided with a third mounting hole for accommodating the top cover, the top cover is detachably connected to the inner cover by screws, a keyhole connected to the slide is provided in the middle of the top cover, a baffle is provided at the keyhole, one end of the baffle is hinged to the inner cover through a hinge shaft, a torsion spring is sleeved at the hinge shaft, one end of the torsion spring is in contact with the baffle, and the other end is in contact with the inner cover.

[0027] With the above technical solution, the baffle plays the role of blocking dust and water when the key is not inserted. When the key needs to be inserted, the key can be directly inserted into the keyhole and the slide. After the key is pulled out, the baffle can automatically cover the through hole for inserting the key, which is more convenient to operate than the existing technology. Among them, a torsion spring is designed, and when the key is pulled out, the baffle can automatically reset and block the keyhole.

[0028] The utility model is further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the assembly state of an embodiment of the utility model;

[0030] Figure 2 A cross-sectional view of an embodiment of the present invention Figure 1 ;

[0031] Figure 3 A cross-sectional view of an embodiment of the present invention Figure 2 ;

[0032] Figure 4 This is a schematic diagram of the internal structure of the lock body of an embodiment of the utility model;

[0033] Figure 5 This is a schematic diagram of an exploded view of a knob according to an embodiment of the utility model;

[0034] Figure 6 This is an exploded schematic diagram of the lock body, connecting piece, and inner cover of an embodiment of the utility model;

[0035] Figure 7 This is an exploded schematic diagram of a lock cylinder linkage assembly according to an embodiment of the utility model;

[0036] Figure 8 A schematic diagram of a lock core according to an embodiment of the utility model;

[0037] Figure 9 A schematic diagram of a lock cylinder linkage assembly and an electromagnetic controller according to an embodiment of the utility model;

[0038] Figure 10 for Figure 9Schematic cross-sectional view in the A-A direction

[0039] Figure 11 is Figure 9 Schematic cross-sectional view in the B-B direction

[0040] Label annotation: lock body 1, knob 2, end cover 3, lock core 4, lock core sleeve 5, rotating shaft 6, rotor switch 7, driving piece 8, lock tongue 9, pin shaft 10, electromagnetic controller 11, pin shaft groove 12, guiding hole 13, first sliding plane 14, second sliding plane 15, pushing piece 16, counterbore 17, guiding rod 18, cap body 19, first mounting hole 20, first spring 21, steel ball 22, first limiting hole 23, second limiting hole 24, inserting rod 25, strip-shaped groove 26, second mounting hole 27, upward groove 28, downward groove 29, limiting piece 30, second inclined plane 31, guiding column 32, sliding hole 33, first inclined plane 34, microswitch 35, third inclined plane 36, mounting part 37, convex block 38, bolt 39, slider 40, clamping groove 41, third spring 42, connecting piece 43, first slot 44, first inserting block 45, second inserting block 46, second slot 47, inner cover 48, outer cover 49, top cover 50, slideway 51, keyhole 52, baffle 53, groove 54 Specific implementation manners

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention

[0042] Such as Figures 1 to 11The shown keyless and keyed ignition switch lock includes a lock body 1, a lock core linkage assembly, a knob 2, and an end cap 3. The end cap 3 is installed at the end of the lock body 1. The knob 2 is rotatably arranged on the end cap 3. The lock core linkage assembly includes a lock core 4 and a lock core sleeve 5 sleeved on the outer periphery of the lock core 4. The lock core 4 is provided with multiple groups of blades, and the lock core sleeve 5 is provided with a blade hole structure for the blades to insert. One end of the lock core sleeve 5 is linked with the knob 2, and the other end is linked with a rotating shaft 6. The rotating shaft 6 can move along the axis direction of the lock core 4. At the end position of the lock body 1 on the side where the rotating shaft 6 is away from the lock core sleeve 5, there is a rotor switch 7. The lock body 1 is also provided with a driving piece 8 and a lock tongue 9. The driving piece 8 is connected with the lock tongue 9. The rotating shaft 6 controls the telescopic movement of the lock tongue 9 through the driving piece 8. The lock body 1 is provided with an electromagnetic controller 11 with a pin shaft 10. The outer peripheral surface of the lock core sleeve 5 is provided with a pin shaft groove 12. The unlocking or locking of the lock core sleeve 5 is realized by the pin shaft 10 disengaging from or inserting into the pin shaft groove 12. The pin shaft groove 12 communicates with a guiding hole 13 penetrating through the side wall of the lock core sleeve 5. The guiding hole 13 is distributed along the direction parallel to the axis of the pin shaft 10, and a pushing piece 16 is arranged in the guiding hole 13. A linkage structure is provided between the lock core 4 and the lock core sleeve 5.

[0043] The linkage structure includes a first sliding plane 14 and a second sliding plane 15. The lock core sleeve 5 is provided with a lock core installation hole distributed along its own axial direction. The first sliding plane 14 is arranged on the inner wall of the lock core installation hole and arranged along the axial direction of the lock core installation hole. The second sliding plane 15 is arranged on the outer periphery of the lock core 4. When the lock core 4 and the lock core sleeve 5 are installed, the positions of the first sliding plane 14 and the second sliding plane 15 correspond to each other.

[0044] After the key is inserted into the lock core 4, press the lock core 4 along the axis direction of the lock core 4. Due to the linkage structure, the lock core 4 moves axially along the lock core sleeve 5 relative to the lock core sleeve 5. During the movement, the pushing piece 16 is extruded. The pushing piece 16 further drives the pin shaft 10 to move until the pin shaft 10 withdraws from the pin shaft groove 12. Then the knob 2 can be rotated. The knob 2 will drive the lock core sleeve 5 to rotate. Since the lock core sleeve 5 is directly linked with the rotating shaft 6, the rotating shaft 6 rotates for ignition, or directly rotate the lock core 4. Due to the linkage structure, the lock core 4 will drive the lock core sleeve 5 to rotate, and then drive the rotating shaft 6 to rotate, and ignition can also be carried out. When the lock core 4 is reset and the key is pulled out, since the electromagnetic controller 11 is equipped with a spring itself, the pin shaft 10 will automatically reset, and the pushing piece 16 corresponding to the pin shaft 10 will also automatically reset.

[0045] A first sliding plane 14 is provided in the lock core installation hole, and a corresponding second sliding plane 15 is provided on the lock core 4, enabling the lock core 4 to slide axially relative to the lock core sleeve 5, while the lock core sleeve 5 and the lock core 4 can rotate synchronously. Therefore, the blade hole and the blade of the blade hole structure on the lock core sleeve 5 are always in the same direction and will not shift in the circumferential direction of the lock core sleeve 5 or the lock core 4. Thus, the key can be pulled out in any gear position, enriching the functions of the ignition switch (in principle, the key cannot be pulled out in the ON gear).

[0046] Due to the provision of the first sliding plane 14 and the second sliding plane 15, the lock core sleeve 5 and the lock core 4 can rotate synchronously, but they will not slide relative to each other in the circumferential direction. When changing gears, the lock core sleeve 5 and the lock core 4 need to rotate synchronously. Therefore, the first sliding plane 14 and the second sliding plane 15 bear torsion. During the process of changing gears, the lock core and the blades are not stressed, protecting the lock core and the blades and extending their service life. The lock on the blade mainly relies on the block between the blade and the blade hole to lock. Due to the limitation of the first sliding plane 14 and the second sliding plane 15 in the circumferential direction, there is no circumferential rotation, that is, no torsion is generated.

[0047] A counterbore 17 is provided between the guide hole 13 and the pin shaft groove 12. The inner diameter of the counterbore 17 is larger than the inner diameter of the guide hole 13. The pushing member 16 includes a guide rod 18 that slidably cooperates with the guide hole 13. One end of the guide rod 18 is connected with a cap body 19 that slidably cooperates with the counterbore 17. The outer diameter of the cap body 19 is larger than the outer diameter of the guide rod 18; a first inclined surface 34 is provided at the other end of the guide rod 18 or the end of the lock core 4. By designing the counterbore 17 and the cap body 19, when the pushing member 16 is pushed by the pin shaft 10 to move, the pushing member 16 will not slide out of the guide hole 13. By designing the guide rod 18 and the guide hole 13, the movement trajectory of the pushing member 16 is ensured to be unique, improving the movement stability of the pushing member 16 and enabling it to accurately correspond to the pin shaft 10. Further designing the first inclined surface 34 improves the action smoothness between the lock core 4 and the pushing member 16 and prevents jamming. Since the ignition switch lock usually has multiple gear positions, such as the ignition gear and the ignition-off gear, a set of pin shaft grooves 12 is provided at each gear position, and a set of pushing members 16 is installed in each set of pin shaft grooves 12. No matter which set of pin shaft grooves 12 the pin shaft 10 is inserted into, during the process of the lock core 4 moving axially along the lock core sleeve 5, the pushing members 16 not linked with the pin shaft 10 will also be pushed and will not interfere with the axial movement of the lock core 4, and the pushing members 16 will not slide out of the guide hole 13, mainly because the lock body 1 blocks the pin shaft grooves 12 that do not participate in the work.

[0048] The lock core 4 is provided with first mounting holes 20 distributed in a direction perpendicular to the axis of the lock core 4. A first spring 21 is arranged in the first mounting hole 20. One end of the first spring 21 abuts against the bottom of the first mounting hole 20, and the other end abuts against and is connected to a steel ball 22. A first limiting hole 23 is provided at the end of the inner wall of the lock core sleeve 5 close to the knob 2. When no key is inserted, the steel ball 22 is clamped with the first limiting hole 23 under the push of the first spring 21. A second limiting hole 24 is provided on the inner wall of the lock core sleeve 5, and a plug rod 25 is inserted into the second limiting hole 24. A strip-shaped groove 26 is provided on the lock core 4 and is distributed in a direction parallel to the axis of the lock core 4. The end of the plug rod 25 away from the second limiting hole 24 is inserted into the strip-shaped groove 26. By designing the first spring 21, the steel ball 22 and the first limiting hole 23, when the lock core 4 is axially reset along the lock core sleeve 5, until the steel ball 22 is clamped into the first limiting hole 23 under the push of the first spring 21, the blade and the blade hole structures correspond to each other. At this time, the blade can be accurately inserted into the blade groove, and the key can be pulled out. By further designing the second limiting hole 24, the plug rod 25 and the strip-shaped groove 26, the maximum moving stroke of the lock core 4 along the axis of the lock core sleeve 5 is limited, and excessive axial position movement of the lock core 4 is avoided.

[0049] The lock core 4 is provided with second mounting holes 27 distributed in a direction perpendicular to the axis of the lock core 4. A limiting member 30 is arranged in the second mounting holes 27. The inner wall of the lock core sleeve 5 is provided with an upward groove 28 and a downward groove 29 in sequence along the axis direction of the lock core sleeve 5 at the end close to the knob 2. The upward groove 28 is distributed on the side close to the knob 2. The upward groove 28 and the downward groove 29 are in a stepped shape and the downward groove 29 is close to the central axis direction of the lock core sleeve 5. One end of the limiting member 30 is provided with a second inclined surface 31 and the other end is a curved surface. The key is provided with a groove 54. After the key is inserted and the lock core 4 is pushed along the axis direction of the lock core sleeve 5, one end of the limiting member 30 slides from the upward groove 28 to the downward groove 29, and the other end of the limiting member 30 is clamped with the groove 54. After the key is inserted, during the process of axially pressing the lock core 4, the limiting member 30 moves from the upward groove 28 to the downward groove 29. During this process, due to "the upward groove 28 and the downward groove 29 are in a stepped shape and the downward groove 29 is close to the central axis direction of the lock core sleeve 5", the limiting member 30 will move towards the key. When the limiting member 30 completely enters the downward groove 29, the other end of the limiting member 30 will be clamped into the groove 54 of the key to limit the key and prevent the key from moving up and down. Among them, "one end of the limiting member 30 is provided with a second inclined surface 31" to prevent the limiting member 30 from getting stuck during the movement between the upward groove 28 and the downward groove 29. When the key needs to be pulled out, the lock core 4 is driven to reset. The limiting member 30 moves from the downward groove 29 to the upward groove 28. Due to "the upward groove and the downward groove 29 are in a stepped shape and the downward groove 29 is close to the central axis direction of the lock core sleeve 5" and "the other end of the limiting member 30 is a curved surface", when pulling out the key, the groove 54 and the limiting member 30 can be separated smoothly. At the same time, the flat surface of the key will push the limiting member 30 to move towards the upward groove 28, and the limiting member 30 will not interfere with the key, so the key can be pulled out smoothly.

[0050] The end of the lock core 4 far from the knob 2 is connected with a guide post 32. The outer diameter of the guide post 32 is smaller than the outer diameter of the lock core 4. A sliding hole 33 adapted to the guide post 32 is arranged in the lock core sleeve 5. A guide hole 13 is distributed on the side wall of the sliding hole 33 and the two are communicated. A first inclined surface 34 is distributed at the end of the guide post 32. The end of the guide rod 18 is provided with a rounded corner. The guide post 32 and the sliding hole 33 are designed to further guide the movement of the lock core 4, improve the transmission stability between the lock core 4 and the pushing member 16, and be able to squeeze the pushing member 16 more accurately. At the same time, the design of the sliding hole 33 is beneficial to increasing the wall thickness of the part of the lock core sleeve 5 at the pin shaft groove 12, facilitating the machining of the guide hole 13 and the counterbore 17, and also providing space for the movement of the pushing member 16.

[0051] The pin shaft groove 12 is set as a long groove. When the pin shaft 10 locks the lock core sleeve 5, the lock core sleeve 5 can move along its own axial direction. A micro switch 35 is provided on the lock body 1. A third inclined surface 36 is provided at the end of the lock core sleeve 5 away from the knob 2. The lock core sleeve 5 can contact the contact of the micro switch 35 through the third inclined surface 36 to open the micro switch 35. A second spring that can drive the lock core sleeve 5 and the rotating shaft 6 to return to their original position is provided in the lock body 1. A micro switch 35 is provided in the lock body 1. Only after the micro switch 35 is triggered and turned on, the electromagnetic controller 11 can operate to make the pin shaft 10 disengage from the pin shaft groove 12. Before rotating the knob 2, the knob 2 is first pushed into the lock body 1 to drive the lock core sleeve 5 to move. Since the pin shaft groove 12 is set as a long groove, the pin shaft groove 12 only limits the rotation of the lock core sleeve 5 and does not affect the movement of the lock core sleeve 5. When the lock core sleeve 5 moves, it will conflict with the contact of the micro switch 35, turning on the micro switch 35. Then, under the action of the second spring, it drives the lock core sleeve 5 and the rotating shaft 6 to complete the reset. At this time, the knob 2 is rotated again to realize the keyless start and flameout operation. Only after the micro switch 35 is turned on first can the keyless start be performed, which can effectively avoid various misoperations, such as accidental opening when children are playing, and is safer and more reliable. Among them, the third inclined surface 36 is designed to prevent the lock core sleeve 5 from getting stuck in the process of pushing the micro switch 35.

[0052] The end cover 3 is provided with a mounting portion 37 which is sleeved on the lock body 1, and a protrusion 38 is provided on the lock body 1. The mounting portion 37 is provided with an opening for the protrusion 38 to be inserted axially, and a groove 41 is provided on one side of the opening for the protrusion 38 to be clamped with the mounting portion 37 after the mounting portion 37 is rotated. A stop structure for limiting the mounting portion 37 after the mounting portion 37 is rotated is also provided between the mounting portion 37 and the lock body 1. The stop structure includes a bolt 39 and a slider 40 slidably provided on the lock body 1. After the mounting portion 37 is inserted into the lock body 1 and rotated, one end of the slider 40 is axially inserted into the opening of the mounting portion 37 along the mounting portion 37, and abuts against the other side of the opening provided with the groove 41. A third spring 42 is provided between the slider 40 and the lock body 1. A long groove is provided on the slider 40 along its sliding direction. The screw body of the bolt 39 passes through the long groove and is screwed and fixed to the lock body 1, and the cap of the bolt 39 presses against the slider 40. When the mounting portion 37 of the end cover 3 is axially plugged into the protrusion 38 on the lock body 1, the mounting portion 37 of the end cover 3 first pushes the slider 40 to slide backward, that is, the slider 40 moves in the direction of overcoming the force of the third spring 42; and after the mounting portion 37 is plugged into the lock body 1 and rotated, that is, at this time, the protrusion 38 on the lock body 1 is inserted into the slot 41, and one end of the slider 40 is axially inserted into the opening of the mounting portion 37 along the mounting portion 37, and abuts against the other side of the opening where the slot 41 is provided, thereby limiting the rotation of the mounting portion 37 and the end cover 3, that is, effectively preventing the protrusion 38 from sliding out of the slot 41, and then achieving the fixed installation of the end cover 3. In addition, the action of the bolt 39 makes the slider 40 only slide linearly relative to the lock body 1, and the structure is more stable and reliable.

[0053] A connector 43 is provided between the knob 2 and the lock core sleeve 5. Two groups of first plug blocks 45 are provided on the outer periphery of the connector 43. A group of first slots 44 are provided at the end of the lock core sleeve 5 corresponding to each group of first plug blocks 45. Two groups of second plug blocks 46 are provided on the end surface of the connector 43 facing the knob 2. The knob 2 is provided with a group of second slots 47 corresponding to each group of second plug blocks 46. The connector 43 and the knob 2 are also detachably connected by screws. The connector 43 is provided with a through hole through which a key can pass. The connector 43 is designed to achieve a stable connection between the knob 2 and the lock core sleeve 5. Furthermore, the connector 43 limits the position of the lock core 4, so that the lock core 4 is stably installed in the lock core sleeve 5.

[0054] The knob 2 includes an inner cover 48, an outer cover 49 installed outside the inner cover 48, and a top cover 50 installed on the top of the outer cover 49. The inner cover 48 is provided with a slideway 51 for inserting a key, and the outer cover 49 is provided with a third mounting hole for accommodating the top cover 50. The top cover 50 is detachably connected to the inner cover 48 by screws. A keyhole 52 connected to the slideway 51 is provided in the middle of the top cover 50. A baffle 53 is provided at the keyhole 52. One end of the baffle 53 is hinged to the inner cover 48 through a hinge shaft. A torsion spring (not shown in the figure) is sleeved at the hinge shaft. One end of the torsion spring contacts the baffle 53 and the other end contacts the inner cover 48. When the key is not inserted, the baffle 53 serves to block dust and water. When the key needs to be inserted, the key can be directly inserted into the keyhole 52 and the slideway 51. After the key is pulled out, the baffle 53 can automatically cover the through hole for inserting the key. Compared with the prior art, the operation is more convenient. Among them, a torsion spring is designed, and when the key is pulled out, the baffle 53 can automatically reset to block the keyhole 52.

[0055] The working principle of this embodiment is as follows:

[0056] When starting with a key, insert the key. Due to the limiting effect of the first spring 21 and the steel ball 22, the key can be fully inserted until the blade is separated from the blade hole structure. Press the lock core 4 axially along the lock core sleeve 5. Due to the linkage structure, the lock core 4 can move axially. The guide column 32 at the end of the lock core 4 squeezes the pusher 16. The pusher 16 pushes the pin 10 out of the pin slot 12, and the lock core sleeve 5 is unlocked. When the knob 2 is turned clockwise, the lock core sleeve 5 drives the rotating shaft 6 to rotate and ignite. This gear position can realize the function of pulling out the key. The lock core 4 is reset until the steel ball 22 is inserted into the first limiting hole 23 under the push of the first spring 21. The blade corresponds to the blade hole structure. At this time, the blade can be accurately inserted into the blade slot, and the key can be pulled out.

[0057] During keyless start, before rotating the knob 2, first push the knob 2 into the lock body 1 to drive the lock core sleeve 5 to move. When the lock core sleeve 5 moves, it will conflict with the contact of the micro switch 35, turning on the micro switch 35. Then, under the action of the second spring, it drives the lock core sleeve 5 and the rotating shaft 6 to complete the reset. Then, the electromagnetic controller 11 can be selectively unlocked by external components such as remote control or NFC, and the pin shaft 10 automatically exits the pin shaft groove 12, and the lock core sleeve 5 is unlocked. When the knob 2 is turned clockwise, the lock core sleeve 5 drives the rotating shaft 6 to rotate, and ignition is performed.

[0058] When locking the front of the vehicle, (i) the keyless front locking method, selectively use the remote control or NFC and other external components to unlock the electromagnetic controller 11, the pin 10 automatically exits the pin slot 12, and the lock cylinder sleeve 5 is unlocked. Press the knob 2, the lock cylinder sleeve 5 drives the shaft 6 to move axially until the shaft 6 is linked with the drive plate 8 (the drive plate 8 is provided with an inclined groove that can be adapted to the shaft 6, which is the prior art), and then turn the knob 2 counterclockwise, the lock cylinder sleeve 5 drives the shaft 6 to rotate, and the shaft 6 controls the lock tongue 9 to extend through the drive plate 8 to complete the locking of the vehicle. (ii) The key-locking method, insert the key, due to the limiting effect of the first spring 21 and the steel ball 22, the key can be fully inserted until the blade and the blade hole structure are separated. Press the lock cylinder 4 axially along the lock cylinder sleeve 5, due to the linkage structure, the lock cylinder 4 can move axially, the guide column 32 at the end of the lock cylinder 4 squeezes the pusher 16, and the pusher 16 pushes the pin 10 out of the pin slot 12, and the lock cylinder sleeve 5 is unlocked. By pressing the knob 2 (or the key), the lock core sleeve 5 drives the rotating shaft 6 to move axially until the rotating shaft 6 is linked with the driving plate 8 (the driving plate 8 is provided with an inclined groove that can be adapted to the rotating shaft 6, which is the prior art), and then the knob 2 (or the key) is turned counterclockwise, the lock core sleeve 5 drives the rotating shaft 6 to rotate, and the rotating shaft 6 controls the lock tongue 9 to extend through the driving plate 8 to complete the locking of the car.

[0059] It should be noted that: since the ignition switch lock is usually provided with multiple gears, such as the ignition gear and the flameout gear, a group of pin shaft grooves 12 are provided at each gear position, and a group of pushing members 16 are installed in each group of pin shaft grooves 12. No matter which group of pin shaft grooves 12 the pin shaft 10 is inserted into, during the axial movement of the lock core 4 along the lock core sleeve 5, the pushing member 16 that is not linked with the pin shaft 10 will also be pushed and will not interfere with the axial movement of the lock core 4.

[0060] This embodiment has the following advantages:

[0061] Compared with the prior art, the pushing member 16 replaces the pin groove positioning block, and the volume of the pushing member 16 can be designed to be smaller. The friction force is smaller compared to the sum of the friction forces between the pin groove positioning block and the lock core sleeve 5 and between the pin groove positioning block and the pin shaft 10, thus improving the customer experience. Further, the relationship between the pushing member 16 and the pin shaft 10 is a pushing relationship, rather than a friction relationship between the pin groove positioning block and the pin shaft 10. Therefore, the wear between the pushing member 16 and the pin shaft 10 is also smaller, and the service life is longer.

[0062] To enable the key to be pulled out in each gear position, by using a linkage structure, the lock core 4 and the lock core sleeve 5 can slide relative to each other along the axis of the lock core sleeve 5 (or the lock core 4), and at the same time, the lock core 4 and the lock core sleeve 5 can rotate synchronously. Therefore, during the gear shifting process, the blades on the lock core 4 and the blade hole structure are always in the same direction. Once the lock core 4 moves upward relative to the lock core sleeve 5 until the blades are aligned with the blade holes of the blade hole structure, the key can be pulled out.

[0063] A baffle 53 is designed at the keyhole 52. When the key is not inserted, the baffle 53 serves to block dust and water, and the baffle 53 is linked with a torsion spring. When the key is pulled out, the baffle 53 can automatically reset to block the keyhole 52.

Claims

1. Keyless and keyed ignition switch locks, including a lock body, a lock core linkage assembly, a knob, and an end cap. The end cap is installed at the end of the lock body. The knob is rotatably arranged on the end cap. The lock core linkage assembly includes a lock core and a lock core sleeve sleeved on the outer periphery of the lock core. A number of groups of blades are provided on the lock core. A blade hole structure for the blades to insert is provided on the lock core sleeve. One end of the lock core sleeve is linked with the knob, and the other end is linked with a rotating shaft. The rotating shaft can move along the axis direction of the lock core. A rotor switch is provided at the end position of the lock body on the side away from the lock core sleeve of the rotating shaft. A driving piece and a lock tongue are also provided on the lock body. The driving piece is connected with the lock tongue. The rotating shaft controls the telescopic movement of the lock tongue through the driving piece. An electromagnetic controller with a pin shaft is provided on the lock body. A pin shaft groove is provided on the outer peripheral surface of the lock core sleeve. The unlocking or locking of the lock core sleeve is realized by the pin shaft disengaging from or inserting into the pin shaft groove. It is characterized in that: The pin shaft groove communicates with a guide hole penetrating through the side wall of the lock core sleeve. The guide holes are distributed along the direction parallel to the axis of the pin shaft, and a pushing member is arranged in the guide holes. A linkage structure is provided between the lock core and the lock core sleeve. When the key is inserted, the lock core can move along the axis direction of the lock core sleeve through the linkage structure and squeeze the pushing member to move along the axis direction of the guide hole. At the same time, the pushing member can push the pin shaft out of the pin shaft groove.

2. The keyless and key-operated ignition switch lock according to claim 1, characterized in that: The linkage structure includes a first sliding plane and a second sliding plane. The lock core sleeve is provided with a lock core installation hole distributed along its own axial direction. The first sliding plane is arranged on the inner wall of the lock core installation hole and arranged along the axial direction of the lock core installation hole. The second sliding plane is arranged on the outer circumference of the lock core, and when the lock core and the lock core sleeve are installed, the positions of the first sliding plane and the second sliding plane correspond to each other.

3. The keyless and key-operated ignition switch lock according to claim 1, characterized in that: A countersunk hole is provided between the guide hole and the pin shaft groove. The inner diameter of the countersunk hole is larger than the inner diameter of the guide hole. The pushing member includes a guide rod slidably matched with the guide hole. One end of the guide rod is connected with a cap body slidably matched with the countersunk hole. The outer diameter of the cap body is larger than the outer diameter of the guide rod. A first inclined surface is provided at the other end of the guide rod or the end of the lock core.

4. The keyless and key-operated ignition switch lock according to claim 3, characterized in that: The lock core is provided with a first installation hole distributed along the direction perpendicular to the axis of the lock core. A first spring is arranged in the first installation hole. One end of the first spring abuts against the bottom of the first installation hole, and the other end abuts against and is connected with a steel ball. A first limiting hole is provided at the end of the inner wall of the lock core sleeve close to the knob. When no key is inserted, the steel ball is clamped with the first limiting hole under the push of the first spring. A second limiting hole is provided on the inner wall of the lock core sleeve. A plug rod is inserted in the second limiting hole. The lock core is provided with a strip-shaped groove distributed along the direction parallel to the axis of the lock core. The end of the plug rod far from the second limiting hole is inserted into the strip-shaped groove.

5. The keyless and key-start ignition switch lock according to claim 4, characterized in that: The lock core is provided with a second installation hole distributed along the direction perpendicular to the axis of the lock core. A limiting member is arranged in the second installation hole. The inner wall of the lock core sleeve at the end close to the knob is provided with an upward groove and a downward groove arranged in sequence along the axis direction of the lock core sleeve. The upward groove is distributed on the side close to the knob. The upward groove and the downward groove are in a stepped shape and the downward groove is close to the central axis direction of the lock core sleeve. One end of the limiting member is provided with a second inclined surface and the other end is in a curved surface. The key is provided with a groove. When the key is inserted and the lock core is pushed along the axis direction of the lock core sleeve, one end of the limiting member slides from the upward groove to the downward groove, and the other end of the limiting member is clamped with the groove.

6. The keyless and key-start ignition switch lock according to claim 5, characterized in that: A guide post is connected to the end of the lock core far from the knob. The outer diameter of the guide post is smaller than the outer diameter of the lock core. A sliding hole adapted to the guide post is arranged in the lock core sleeve. The guide holes are distributed on the side wall of the sliding hole and the two are communicated. The first inclined surface is distributed at the end of the guide post. The end of the guide rod is provided with a rounded corner.

7. The keyless and key-operated ignition switch lock according to any one of claims 1 to 6, characterized in that: The pin shaft groove is arranged as a long groove. When the pin shaft locks the lock core sleeve, the lock core sleeve can move along its own axis direction. A micro switch is provided on the lock body. A third inclined surface is provided at the end of the lock core sleeve away from the knob. The lock core sleeve can contact the contact of the micro switch through the third inclined surface to turn on the micro switch. A second spring for driving the lock core sleeve and the rotating shaft to reset is provided in the lock body.

8. The keyless and key-operated ignition switch lock according to any one of claims 1 to 6, characterized in that: The end cover is provided with an installation part sleeved on the lock body. A convex block is provided on the lock body. The installation part is provided with an opening for the convex block to be inserted axially. A clamping groove for forming a clamping connection with the convex block after the installation part rotates is provided on one side surface of the opening. A retaining structure for limiting the installation part after it rotates is also provided between the installation part and the lock body. The retaining structure includes a bolt and a slider slidably arranged on the lock body. After the installation part is inserted into the lock body and rotated, one end of the slider is inserted into the opening of the installation part along the axial direction of the installation part and abuts against the other side surface of the opening provided with the clamping groove. A third spring is provided between the slider and the lock body. A long groove is provided on the slider along its sliding direction. The screw body of the bolt passes through the long groove and is screwed and fixed on the lock body. The cap portion of the bolt presses against the slider.

9. The keyless and key-start ignition switch lock according to any one of claims 1 to 6, characterized in that: A connecting member is provided between the knob and the lock core sleeve. A plurality of groups of first insertion blocks are provided on the outer periphery of the connecting member. A group of first insertion slots are provided at the end of the lock core sleeve corresponding to each group of first insertion blocks. A plurality of groups of second insertion blocks are provided on the end surface of the connecting member facing the knob. A group of second insertion slots are provided on the knob corresponding to each group of second insertion blocks. The connecting member and the knob are also detachably connected by screws. A through hole through which the key can pass is provided on the connecting member.

10. The keyless and key-operated ignition switch lock according to any one of claims 1 to 6, characterized in that: The knob includes an inner cover, an outer cover installed outside the inner cover, and a top cover installed on the top of the outer cover. The inner cover is provided with a slideway for the key to be inserted. The outer cover is provided with a third installation hole for accommodating the top cover. The top cover is detachably connected to the inner cover by screws. A keyhole communicated with the slideway is provided in the middle of the top cover. A baffle is provided at the keyhole. One end of the baffle is hinged to the inner cover through a hinge shaft. A torsion spring is sleeved on the hinge shaft. One end of the torsion spring abuts against the baffle and the other end abuts against the inner cover.

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