Lock cylinder capable of unlocking in emergency

Abstract

The utility model belongs to the field of door locks, and relates to an emergency unlocking lock cylinder which comprises a lock cylinder shell, a mounting hole is formed in the lock cylinder shell, an unlocking guide sleeve and an emergency guide sleeve are rotatably connected in the mounting hole, the unlocking guide sleeve is connected with an unlocking rotating rod, an unlocking guide groove is formed in the unlocking guide sleeve, an emergency guide groove is formed in the emergency guide sleeve, and the emergency guide sleeve is connected with an unlocking rotating rod. A linkage shaft is arranged in the unlocking guide hole, and an unlocking bulge and an emergency bulge are arranged on the linkage shaft; an emergency transmission button is further arranged in the mounting hole, the emergency transmission button extends into the emergency guide groove to form a transmission protrusion, and a guide inclined groove is formed in the emergency transmission button. An emergency rotating rod is further rotationally arranged in the emergency transmission button, a protruding block is arranged on the emergency rotating rod corresponding to the guide inclined groove, the emergency rotating rod extends out of the lock cylinder shell towards the side away from the lock cylinder, and a rotation limiting mechanism is arranged on the emergency transmission button. The device has the advantages of being simple in structure, few in parts and convenient to install.

Description

Technical Field

[0001] This utility model belongs to the field of door locks and relates to a lock cylinder that can be unlocked in an emergency. Technical Background

[0002] Existing smart locks can be unlocked via fingerprints, ID cards, facial recognition, and passwords. However, smart locks consume power quickly and are prone to running out of battery, rendering them unusable. Although smart locks are generally equipped with a key for unlocking when the battery is dead, the convenience of smart locks makes it easy for people to forget to bring their keys, resulting in situations where the door cannot be opened. Summary of the Invention

[0003] In response to the above-mentioned problems, this invention provides a lock cylinder that can be unlocked in an emergency. This installation structure has the advantage of being able to unlock even without a key.

[0004] The objective of this invention is achieved as follows:

[0005] An emergency unlocking lock cylinder includes a lock cylinder shell with a through mounting hole and a lock cylinder groove for rotating the lock cylinder. The lock cylinder is housed within the lock cylinder groove. An unlocking guide sleeve and an emergency guide sleeve are rotatably connected within the mounting hole. The unlocking guide sleeve and the emergency guide sleeve are located on opposite sides of the lock cylinder groove. An unlocking rotating rod is connected to the end of the unlocking guide sleeve furthest from the lock cylinder. An unlocking guide hole is formed within the unlocking guide sleeve, and an unlocking guide groove is formed on the side of the unlocking guide hole. An emergency guide hole is formed within the emergency guide sleeve, and an emergency guide groove is formed on the side of the emergency guide hole. A linkage shaft is provided within the unlocking guide hole, extending through the lock cylinder groove into the emergency guide hole. An unlocking protrusion and an emergency protrusion are provided on the linkage shaft corresponding to the unlocking guide groove. The lock cylinder is fitted onto the linkage shaft, and a rotating groove matching the unlocking protrusion is formed within the lock cylinder. The rotating groove also matches the emergency protrusion.

[0006] An emergency transmission button is also provided in the mounting hole. The emergency transmission button is located on the side of the emergency guide sleeve away from the lock cylinder. The emergency transmission button extends into the emergency guide groove with a transmission protrusion. A guide groove is formed on the emergency transmission button. An emergency rotating rod is also rotatably provided in the emergency transmission button. The emergency rotating rod is provided with a protrusion corresponding to the guide groove. The emergency rotating rod extends to the outside of the lock cylinder housing on the side away from the lock cylinder. A rotation limiting mechanism is provided on the emergency transmission button.

[0007] The unlocking guide sleeve is equipped with a first spring, which always applies a force to the linkage shaft to move towards the emergency transmission button; a second spring is provided between the emergency transmission button and the linkage shaft, which always applies a force to move the emergency transmission button and the linkage shaft away from each other; during normal unlocking, the transmission protrusion of the emergency transmission button separates from the emergency guide groove, and the unlocking rotating rod rotates to drive the lock cylinder to rotate and unlock; during emergency unlocking, the emergency rotating rod rotates to extend the transmission protrusion of the emergency transmission button into the emergency guide groove, and the continued rotation of the emergency rotating rod drives the lock cylinder to rotate and unlock.

[0008] With the above setup, when the battery is dead, rotating the emergency rotating lever will cause the emergency transmission knob to move downwards. Since the rotation of the emergency transmission knob is limited by the rotation-limiting mechanism, the protrusion on the emergency rotating lever moves within the guide groove, causing the emergency transmission knob to extend into the emergency guide groove. This links the emergency transmission knob, the emergency guide sleeve, the linkage shaft, and the lock cylinder, pushing the linkage shaft downwards and causing the emergency protrusion to enter the lock cylinder's rotation groove. The unlocking protrusion then leaves the lock cylinder's rotation groove, allowing the lock cylinder to rotate by rotating the emergency rotating lever, ultimately achieving emergency unlocking. After unlocking, the emergency transmission knob, under the action of the second spring, separates from the linkage shaft, ensuring normal unlocking can be restored.

[0009] The present invention is further configured such that: the rotation limiting mechanism includes a ring of splines formed on the end of the emergency transmission button away from the lock cylinder, and a ring of spline grooves is formed on the inner wall of the mounting hole relative to the position of the splines.

[0010] The design of splines and spline grooves enables the emergency transmission knob to be reset at all angles, reducing the possibility of reset failure and improving the overall stability of the lock body.

[0011] The present invention is further configured such that the distance from the top of the spline groove to the upper end of the emergency guide groove is greater than the length of the emergency transmission button.

[0012] The present invention is further configured such that: the emergency guide hole penetrates the emergency guide sleeve, and the emergency guide groove also penetrates the emergency guide sleeve.

[0013] With the above settings, when the transmission protrusion of the emergency transmission button extends into the emergency guide groove, the emergency protrusion of the linkage shaft is also in the emergency guide groove, which makes it easier for the emergency transmission button, emergency guide sleeve and linkage shaft to work together.

[0014] The present invention is further configured such that the guide groove is "V" shaped.

[0015] With the above settings, regardless of whether the emergency rotating lever is turned to the left or right, it can drive the emergency transmission knob to move downwards, achieving linkage.

[0016] The present invention is further configured such that: the emergency transmission button is formed with two guide grooves, and the emergency rotating rod is provided with two protrusions.

[0017] The present invention is further configured such that: the unlocking guide sleeve is provided with a first snap ring groove, the first snap ring is provided on the first snap ring groove, and the first snap ring abuts between the lower end face of the lock cylinder and the upper end face of the lock cylinder groove; the emergency guide sleeve is provided with a second snap ring groove, the second snap ring is provided on the second snap ring groove, and the second snap ring abuts between the upper end face of the lock cylinder and the lower end face of the lock cylinder groove.

[0018] The above settings ensure that the unlocking guide sleeve, lock cylinder, and emergency guide sleeve can only rotate and will not move axially.

[0019] The present invention is further configured such that: the linkage shaft includes a central shaft, a central shaft groove is provided on the central shaft, a third retaining ring is sleeved on the central shaft groove, an unlocking component and an emergency component are rotatably sleeved on the central shaft, the unlocking component and the emergency component are respectively provided on the upper and lower sides of the third retaining ring; the unlocking protrusion is formed on the unlocking component, and the emergency protrusion is formed on the emergency component.

[0020] Through the above settings, the unlocking component and the emergency component can rotate independently, which in turn allows the unlocking protrusion and the emergency protrusion to rotate independently. This means that when the unlocking lever rotates, causing the lock cylinder to rotate, the emergency component and the emergency guide sleeve will not rotate. This reduces resistance during unlocking, minimizes wear on the emergency component and guide sleeve, and ensures uninterrupted operation should the emergency transmission button not separate from the emergency guide sleeve. During emergency unlocking, rotating the emergency lever causes the lock cylinder to rotate, but the unlocking component and the unlocking guide sleeve will not rotate, making emergency unlocking easier. Because the unlocking component and the emergency component rotate independently, during emergency unlocking, the lock cylinder's rotation groove only interacts with the emergency protrusion. Therefore, after rotation, the unlocking guide groove and the lock cylinder's rotation groove become misaligned. Before resetting, the unlocking component is pressed against the unlocking guide hole. Only after the emergency component accurately resets will the unlocking guide groove and the lock cylinder's rotation groove become parallel. The first spring then pushes the unlocking component into the rotation groove and pushes the emergency component out of the rotation groove. This ensures that unlocking is only possible after a complete reset.

[0021] The invention is further configured such that: the first spring rests between the bottom end of the unlocking guide hole and the unlocking member, and the first spring always applies a force to the unlocking member to move in the direction of the emergency guide sleeve.

[0022] The invention is further configured such that: the second spring rests between the emergency component and the emergency transmission button, and the second spring always exerts a force that keeps the emergency transmission button and the emergency component away from each other.

[0023] The present invention is further configured such that: a spring fixing groove is formed on the transmission protrusion of the emergency transmission button, the upper end of the second spring is disposed in the spring fixing groove, the central shaft portion of the linkage shaft extends out of the emergency component to form a spring guide end, and the lower end of the second spring is sleeved outside the spring guide end and abuts against the upper surface of the emergency component.

[0024] The above settings make the second spring run more stably.

[0025] The outstanding and beneficial technical effect of this invention compared with the prior art is that when the battery is dead, the emergency rotating rod can be rotated to make the transmission protrusion extend into the emergency guide groove to realize the linkage of the emergency transmission button, the emergency guide sleeve, the linkage shaft and the lock cylinder, and push the linkage shaft to move downward, so that the emergency protrusion enters the rotation groove of the lock cylinder. Thus, by rotating the emergency rotating rod, the lock cylinder can be rotated, and finally the emergency unlocking can be achieved. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 It is a structural schematic diagram of the present invention.

[0028] Figure 2 This is one of the exploded views of the structure of the present invention.

[0029] Figure 3 This is the second exploded view of the structure of the present invention.

[0030] Figure 4 This is the outer shell of the lock cylinder.

[0031] Figure 5 for Figure 4 Sectional view at point AA.

[0032] Figure 6 This is a diagram of the internal structure when the lock is normally opened.

[0033] Figure 7 This is a diagram of the internal structure for emergency unlocking.

[0034] Figure 8 This is a schematic diagram of the linkage shaft.

[0035] Figure 9 This is a schematic diagram of the emergency transmission button.

[0036] 1-Lock cylinder housing; 101-Mounting hole; 102-Lock cylinder groove; 103-Spline groove;

[0037] 2-Lock cylinder; 201-Rotating groove;

[0038] 3-Unlocking guide sleeve; 301-Unlocking rotating rod; 302-Unlocking guide hole; 303-Unlocking guide groove; 304-First spring; 305-First snap ring groove; 306-First snap ring;

[0039] 4-Emergency guide sleeve; 402-Emergency guide hole; 403-Emergency guide groove; 404-Second snap ring groove; 405-Second snap ring;

[0040] 5-Linkage shaft; 51-Central shaft; 501-Unlocking protrusion; 502-Emergency protrusion; 503-Central shaft groove; 504-Third retaining ring; 505-Unlocking component; 506-Emergency component; 507-Spring guide end;

[0041] 6-Emergency transmission button; 601-Transmission protrusion; 602-Guide groove; 603-Emergency rotating rod; 604-Protrusion; 605-Second spring; 606-Spline; 607-Spring fixing groove. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0043] An emergency unlocking lock cylinder includes a lock cylinder housing 1, on which a through mounting hole 101 is formed, and a lock cylinder groove 102 for the lock cylinder to rotate. A lock cylinder 2 is disposed within the lock cylinder groove. An unlocking guide sleeve 3 and an emergency guide sleeve 4 are rotatably connected within the mounting hole 101. The unlocking guide sleeve 3 and the emergency guide sleeve 4 are disposed on opposite sides of the lock cylinder groove 102. An unlocking rotating rod 301 is connected to the end of the unlocking guide sleeve 3 furthest from the lock cylinder 2. An unlocking guide hole 302 is formed within the unlocking guide sleeve 3, and an unlocking guide groove 303 is formed on the side of the unlocking guide hole 302. An emergency guide hole 402 is formed inside the sleeve 4, and an emergency guide groove 403 is formed on the side of the emergency guide hole. A linkage shaft 5 is provided inside the unlocking guide hole 402. The linkage shaft 5 extends through the lock cylinder groove 102 into the emergency guide hole 402. An unlocking protrusion 501 is provided on the linkage shaft 5 corresponding to the unlocking guide groove 303. An emergency protrusion 502 is provided on the linkage shaft 5 corresponding to the emergency guide groove 403. The lock cylinder 2 is sleeved on the linkage shaft 5. A rotating groove 201 matching the unlocking protrusion 501 is formed inside the lock cylinder 2. The rotating groove 201 also matches the emergency protrusion 502.

[0044] An emergency transmission button 6 is also provided in the mounting hole 101. The emergency transmission button 6 is located on the side of the emergency guide sleeve 4 away from the lock cylinder 2. The emergency transmission button 6 extends into the emergency guide groove 403 with a transmission protrusion 601. A guide groove 602 is formed on the emergency transmission button 6. An emergency rotating rod 603 is also rotatably provided in the emergency transmission button 6. The emergency rotating rod 603 is provided with a protrusion 604 corresponding to the guide groove 602. The emergency rotating rod 603 extends to the outside of the lock cylinder housing 1 on the side away from the lock cylinder. A rotation limiting mechanism is provided on the emergency transmission button 6.

[0045] The unlocking guide sleeve 3 is provided with a first spring 304, which always applies a force to the linkage shaft 5 to move in the direction of the emergency transmission button 6; a second spring 605 is provided between the emergency transmission button 6 and the linkage shaft 5, which always applies a force to move the emergency transmission button 6 and the linkage shaft 5 away from each other; during normal unlocking, the transmission protrusion 601 of the emergency transmission button and the emergency guide groove 403 separate, and the unlocking rotating rod 301 rotates to drive the lock cylinder 2 to rotate and unlock; during emergency unlocking, the emergency rotating rod 603 rotates to extend the transmission protrusion 601 of the emergency transmission button into the emergency guide groove 403, and the emergency rotating rod 603 continues to rotate to drive the lock cylinder 2 to rotate and unlock.

[0046] With the above settings, when the battery runs out of power, the emergency turning rod 603 can be rotated. The driving method of the emergency turning rod 603 can adopt a password motor or a mechanical password knob, etc. Since the rotation direction of the emergency transmission knob 6 is restricted by the rotation limiting mechanism, the bump 604 on the emergency turning rod 6 moves in the guiding inclined groove 602, which can drive the emergency transmission knob 6 to move downward, so that the transmission protrusion 601 extends into the emergency guiding groove 403. The transmission protrusion 601 pushes the linkage shaft 5 downward, so that the emergency protrusion 502 enters the rotation groove 201 of the lock core, and the unlocking protrusion 501 leaves the rotation groove 201 of the lock core, realizing the linkage of the emergency transmission knob 6, the emergency guiding sleeve 4, the linkage shaft 5 and the lock core 2. Thus, the rotation of the lock core 2 can be realized by rotating the emergency turning rod 603, and finally the emergency unlocking is realized. After unlocking, under the action of the second spring 605, the emergency transmission knob 6 moves the emergency transmission knob 6 and the linkage shaft 5 away from each other, so that the transmission protrusion 601 of the emergency transmission knob leaves the emergency guiding groove 403 and separates, thus ensuring the restoration of normal unlocking.

[0047] The rotation limiting mechanism includes a circle of splines 606 formed at one end of the emergency transmission knob 6 away from the lock core. A circle of spline grooves 103 is formed on the inner wall of the mounting hole 101 at the position corresponding to the splines 606. The distance from the top of the spline groove 103 to the upper end of the emergency guiding groove 403 is greater than the length of the emergency transmission knob 6. Through the design of the splines 606 and the spline grooves 103, the emergency transmission knob can be reset at any angle, reducing the possibility of reset failure and improving the overall stability of the lock body.

[0048] The emergency guiding hole 402 penetrates through the emergency guiding sleeve 4, and the emergency guiding groove 403 also penetrates through the emergency guiding sleeve 4. With the above settings, when the transmission protrusion 601 of the emergency transmission knob 6 extends into the emergency guiding groove 403, the emergency protrusion 502 of the linkage shaft 5 is also in the emergency guiding groove 403, which is more convenient for the linkage of the emergency transmission knob 6, the emergency guiding sleeve 4 and the linkage shaft 5.

[0049] The guiding inclined groove 602 is "V"-shaped. Two guiding inclined grooves 602 are formed on the emergency transmission knob 6, and two bumps 604 are provided on the emergency turning rod 603. With the above settings, no matter whether the emergency turning rod rotates to the left or to the right, it can drive the emergency transmission knob to move downward and realize the linkage.

[0050] The unlocking guiding sleeve 3 is provided with a first spring clip groove 305, and a first spring clip 306 is provided on the first spring clip groove 305. The first spring clip 306 abuts between the lower end face of the lock core 2 and the upper end face of the lock core groove 102; the emergency guiding sleeve 4 is provided with a second spring clip groove 404, and a second spring clip 405 is provided on the second spring clip groove 404. The second spring clip 405 abuts between the upper end face of the lock core 2 and the lower end face of the lock core groove 102. With the above settings, the unlocking guiding sleeve 3, the lock core 2 and the emergency guiding sleeve 4 can only rotate and will not move axially.

[0051] The linkage shaft 5 includes a central shaft 51, a central shaft groove 503 is provided on the central shaft 51, a third retaining spring 504 is sleeved on the central shaft groove 503, and an unlocking component 505 and an emergency component 506 are rotatably sleeved on the central shaft 51. The unlocking component 505 and the emergency component 506 are respectively provided on the upper and lower sides of the third retaining spring 504; the unlocking protrusion 501 is formed on the unlocking component 505, and the emergency protrusion 502 is formed on the emergency component 506.

[0052] Through the above settings, the unlocking component 505 and the emergency component 506 can rotate independently, which also allows the unlocking protrusion 501 and the emergency protrusion 502 to rotate independently. This means that when the unlocking lever 301 rotates, causing the lock cylinder 2 to rotate, the emergency component 506 and the emergency guide sleeve 4 will not rotate. This reduces resistance during unlocking, minimizes wear on the emergency component 506 and the emergency guide sleeve 4, and ensures normal unlocking even if the emergency transmission button 6 is not separated from the emergency guide sleeve 4. During emergency unlocking, rotating the emergency lever 603 causes the lock cylinder 2 to rotate, but the unlocking component 505 and the unlocking guide sleeve 3 will not rotate, making emergency unlocking easier. Because the unlocking component 505 and the emergency component 506 rotate independently, during emergency unlocking, the lock cylinder's rotating groove 201 only interacts with the emergency protrusion 502. Therefore, after rotation, the unlocking guide groove 303 and the lock cylinder's rotating groove 201 become misaligned. Before resetting, the unlocking component 505 is pressed against the unlocking guide hole 302. Only after the emergency component 506 is accurately reset will the unlocking guide groove 303 and the lock cylinder's rotating groove 201 become parallel. The first spring 304 then pushes the unlocking component 505 into the rotating groove 201 and pushes the emergency component 506 out of the rotating groove 201. This ensures that unlocking is only possible after resetting is complete.

[0053] The first spring 304 rests between the bottom end of the unlocking guide hole 302 and the unlocking member 505, and the first spring 304 always applies a force to the unlocking member 505 to move in the direction of the emergency guide sleeve 4.

[0054] The second spring 605 rests between the emergency component 506 and the emergency transmission button 6, and the second spring 605 always exerts a force that keeps the emergency transmission button 6 and the emergency component 506 away from each other.

[0055] The emergency transmission button 6 has a spring fixing groove 606 formed on its transmission protrusion 601. The upper end of the second spring 605 is disposed in the spring fixing groove 606. The central shaft 51 of the linkage shaft 5 extends out of the emergency component 506 to form a spring guide end 507. The lower end of the second spring 605 is sleeved on the spring guide end 507 and abuts against the upper surface of the emergency component 506. Through the above arrangement, the operation of the second spring is made more stable.

[0056] This invention has the feature of allowing for emergency unlocking even without a key.

[0057] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A lock cylinder capable of emergency unlocking, comprising a lock cylinder housing, a through mounting hole formed on the lock cylinder housing, and a lock cylinder groove for rotating the lock cylinder, wherein a lock cylinder is disposed within the lock cylinder groove, characterized in that: An unlocking guide sleeve and an emergency guide sleeve are rotatably connected inside the mounting hole. The unlocking guide sleeve and the emergency guide sleeve are located on both sides of the lock cylinder groove. An unlocking rotating rod is connected to the end of the unlocking guide sleeve away from the lock cylinder. An unlocking guide hole is formed inside the unlocking guide sleeve, and an unlocking guide groove is formed on the side of the unlocking guide hole. An emergency guide hole is formed inside the emergency guide sleeve, and an emergency guide groove is formed on the side of the emergency guide hole. A linkage shaft is provided inside the unlocking guide hole. The linkage shaft passes through the lock cylinder groove and extends into the emergency guide hole. An unlocking protrusion is provided on the linkage shaft corresponding to the unlocking guide groove, and an emergency protrusion is provided on the linkage shaft corresponding to the emergency guide groove. The lock cylinder is fitted on the linkage shaft. A rotating groove matching the unlocking protrusion is formed inside the lock cylinder. The rotating groove also matches the emergency protrusion. An emergency transmission button is also provided in the mounting hole. The emergency transmission button is located on the side of the emergency guide sleeve away from the lock cylinder. The emergency transmission button extends into the emergency guide groove with a transmission protrusion. A guide groove is formed on the emergency transmission button. An emergency rotating rod is also rotatably provided in the emergency transmission button. The emergency rotating rod is provided with a protrusion corresponding to the guide groove. The emergency rotating rod extends to the outside of the lock cylinder housing on the side away from the lock cylinder. A rotation limiting mechanism is provided on the emergency transmission button. The unlocking guide sleeve is equipped with a first spring, which always applies a force to the linkage shaft to move towards the emergency transmission button; a second spring is provided between the emergency transmission button and the linkage shaft, which always applies a force to move the emergency transmission button and the linkage shaft away from each other; during normal unlocking, the transmission protrusion of the emergency transmission button separates from the emergency guide groove, and the unlocking rotating rod rotates to drive the lock cylinder to rotate and unlock; during emergency unlocking, the emergency rotating rod rotates to extend the transmission protrusion of the emergency transmission button into the emergency guide groove, and the continued rotation of the emergency rotating rod drives the lock cylinder to rotate and unlock.

2. The lock cylinder capable of emergency unlocking according to claim 1, characterized in that: The rotation limiting mechanism includes a ring of splines formed on the end of the emergency transmission button away from the lock cylinder, and a ring of spline grooves formed on the inner wall of the mounting hole relative to the spline position.

3. The lock cylinder capable of emergency unlocking according to claim 2, characterized in that: The distance from the top of the spline groove to the top of the emergency guide groove is greater than the length of the emergency transmission button.

4. The lock cylinder capable of emergency unlocking according to claim 1, characterized in that: The emergency guide hole penetrates the emergency guide sleeve, and the emergency guide groove also penetrates the emergency guide sleeve.

5. A lock cylinder capable of emergency unlocking according to claim 1, characterized in that: The guide groove is V-shaped.

6. The lock cylinder capable of emergency unlocking according to claim 1, characterized in that: The unlocking guide sleeve is provided with a first snap ring groove, and a first snap ring is provided on the first snap ring groove, which abuts between the lower end face of the lock cylinder and the upper end face of the lock cylinder groove; the emergency guide sleeve is provided with a second snap ring groove, and a second snap ring is provided on the second snap ring groove, which abuts between the upper end face of the lock cylinder and the lower end face of the lock cylinder groove.

7. The lock cylinder capable of emergency unlocking according to claim 1, characterized in that: The linkage shaft includes a central shaft with a central shaft groove. A third retaining ring is sleeved on the central shaft groove. An unlocking component and an emergency component are rotatably sleeved on the central shaft. The unlocking component and the emergency component are respectively located on the upper and lower sides of the third retaining ring. The unlocking protrusion is formed on the unlocking component, and the emergency protrusion is formed on the emergency component.

8. A lock cylinder capable of emergency unlocking according to claim 7, characterized in that: The first spring rests between the bottom of the unlocking guide hole and the unlocking component, and the first spring always applies a force to the unlocking component to move in the direction of the emergency guide sleeve.

9. A lock cylinder capable of emergency unlocking according to claim 7, characterized in that: The second spring rests between the emergency component and the emergency actuator, and the second spring always exerts a force that keeps the emergency actuator and the emergency component away from each other.

10. A lock cylinder capable of emergency unlocking according to claim 9, characterized in that: The emergency transmission button has a spring fixing groove formed on its transmission protrusion. The upper end of the second spring is set in the spring fixing groove. The central shaft part of the linkage shaft extends out of the emergency component to form a spring guide end. The lower end of the second spring is sleeved outside the spring guide end and abuts against the upper surface of the emergency component.

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