Door lock, lockset and anti-theft door
By designing a multi-level guide channel and a baffle structure in the door lock, the theft risk caused by exposed keyholes and the inconvenience of unlocking for users are solved, achieving convenient unlocking and efficient anti-theft effects.
Patent Information
- Application Number
- CN202422924599.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-11-28
AI Technical Summary
The keyhole of existing door locks is exposed on the outside, making it easy for thieves to find and unlock. Furthermore, the key is difficult to insert from the front when it is covered by a cover, affecting the user's convenience in unlocking the door.
A door lock was designed, comprising a lock cylinder, a base, and a guide sleeve. The guide sleeve has a first-stage and a second-stage guide channel along the axial direction. The key can easily enter through the first-stage guide channel and accurately insert into the lock hole through the second-stage guide channel. Combined with a baffle to block the through hole, the theft is made more difficult.
It enables easy key insertion into the keyhole and accurate unlocking, reducing the difficulty of unlocking while improving anti-theft effects and reducing the probability of the keyhole being discovered.
Smart Images
Figure CN223577709U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of door locks, in particular to a door lock, a lock and a security door. BACKGROUND
[0002] As an important part of the security system, the safety performance of the door lock is more and more concerned and valued by people. Usually, the thief enters from the door, and the thief uses the unlocking tool to extend into the lock hole to unlock and steal.
[0003] In life, a lock hole is arranged on the door lock, and the lock hole is exposed on the outside, which is convenient for opening with a key. However, the thief can also easily find the lock hole and open the lock to steal. The lock hole is exposed on the surface of the lock body, and the anti-theft effect is not good.
[0004] In the related art, the lock core is shielded by a shielding piece to achieve the hiding effect of the lock hole, reduce the probability of being found by the thief, and increase the difficulty of the thief using the tool to open the lock, thereby improving the anti-theft effect. However, when the user uses the key to open the lock, the key cannot be inserted into the lock hole due to the shielding of the shielding piece, and it is not easy to align the key with the lock hole, which affects the user to use the key to open the lock. Utility model content
[0005] Therefore, the present application provides a door lock, a lock and a security door to solve or improve the problem of inconvenient user unlocking.
[0006] In a first aspect, the present application provides a door lock, comprising:
[0007] A lock core is provided with a lock hole;
[0008] A base is provided with a through hole corresponding to the lock hole of the lock core;
[0009] A guide sleeve is sequentially provided with a first-stage guide channel, a second-stage guide channel and a connecting channel in the axial direction, one end of the lock core provided with the lock hole penetrates into and is installed in the connecting channel, the diameter of the end of the first-stage guide channel away from the connecting channel is greater than the diameter of the end of the second-stage guide channel away from the connecting channel, the first cross section of the end of the second-stage guide channel close to the lock core is circular, the diameter of the first cross section is equal to the diagonal line of the lock hole, and the second-stage guide channel is used for guiding the key into the lock hole.
[0010] Beneficial effects: The base is installed on the door plate, the lock hole of the lock cylinder corresponds to the through hole of the base, and during the unlocking process of the user, the key is first inserted into the first guide channel, the size of the first guide channel is larger than that of the key, so that the key can easily enter the first guide channel. The second guide channel is communicated with the first guide channel, and the diameter of the end of the first guide channel away from the connecting channel is greater than the diameter of the end of the second guide channel away from the connecting channel, the first guide channel can guide the key into the second guide channel, the first cross section of the end of the second guide channel close to the lock hole is circular, the first cross section is perpendicular to the axial direction of the guide sleeve, the cross section of the lock hole is rectangular, and the diameter of the cross section of the second guide channel is equal to the diagonal of the cross section of the lock hole. Therefore, during the movement of the key along the first guide channel to the lock hole, the key can be accurately inserted into the lock hole under the guidance of the second guide channel, and then the key is rotated to unlock, thereby reducing the unlocking difficulty of the user.
[0011] In an alternative embodiment, the second guide channel comprises a first segment and a second segment in communication with each other, the first segment is close to the lock cylinder and communicated with the connecting channel, and the second segment is communicated with the first guide channel, and the second segment gradually narrows from the first guide channel to the connecting channel.
[0012] In an alternative embodiment, the outer wall of the guide sleeve is provided with a limiting plate strip, the limiting plate strip extends along the axial direction of the guide sleeve, and the end close to the first guide channel abuts against the end of the through hole.
[0013] In an alternative embodiment, a plurality of limiting plate strips are provided, the plurality of limiting plate strips are arranged in parallel, and the plurality of limiting plate strips are distributed in the circumferential direction of the guide sleeve.
[0014] In an alternative embodiment, at least one limiting plate strip is provided with a plurality of grooves, and the plurality of grooves are distributed in the axial direction of the guide sleeve.
[0015] In an alternative embodiment, a connecting piece is further provided, a connecting plate is connected to the side wall of the guide sleeve, the connecting plate is provided with a first connecting hole, the lock cylinder is provided with a second connecting hole corresponding to the first connecting hole, and the guide sleeve and the lock cylinder are connected through the connecting piece inserted into the first connecting hole and the second connecting hole.
[0016] In a second aspect, the application further provides a lock, comprising a key, a baffle and a door lock, the baffle is connected to the base and used for shielding the through hole, and a first gap is arranged between the baffle and the through hole.
[0017] The key comprises an unlocking segment, the unlocking segment penetrates into the first gap and is inserted into the lock hole in sequence through the first guide channel and the second guide channel.
[0018] In an alternative embodiment, the key further comprises a handle section, the handle section being pivotally connected to the unlocking section to enable the unlocking section to be inserted into the keyhole through the first gap.
[0019] In an alternative embodiment, the handle section comprises a plurality of articulated members, the plurality of articulated members being pivotally connected, the handle section being insertable into the first level guide channel.
[0020] In a third aspect, the application further provides a security door, the door panel and the lock, the base being mounted on the door panel, the door panel being provided with a mounting slot, the lock cylinder being mounted in the mounting slot, the slot opening of the mounting slot being oppositely arranged with the through hole. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.
[0022] Figure 1 A structural schematic diagram of a door lock according to an embodiment of the present application;
[0023] Figure 2 A structural schematic diagram of a guide sleeve in a door lock according to an embodiment of the present application;
[0024] Figure 3 A sectional view of a guide sleeve in a door lock according to an embodiment of the present application;
[0025] Figure 4 A structural schematic diagram of a connection between a lock cylinder and a guide sleeve in a door lock according to an embodiment of the present application;
[0026] Figure 5 A structural schematic diagram of a guide sleeve in another door lock according to an embodiment of the present application;
[0027] Figure 6 A sectional view of a connection between a second level guide channel and a lock cylinder in a door lock according to an embodiment of the present application;
[0028] Figure 7 An installation schematic diagram of a key, a guide sleeve and a lock cylinder in a lock according to an embodiment of the present application;
[0029] Figure 8 A structural schematic diagram of a key in a lock according to an embodiment of the present application;
[0030] Figure 9 A structural schematic diagram of an articulated seat in a lock according to an embodiment of the present application;
[0031] Figure 10 FIG. 1 is a structural schematic diagram of a hinge in a lock according to an embodiment of the present application;
[0032] Figure 11 FIG. 2 is a structural schematic diagram of a lock according to an embodiment of the present application.
[0033] Legend of reference signs:
[0034] 1, lock cylinder; 101, mounting hole; 102, lock hole; 2, base; 3, through hole; 4, guide sleeve; 401, first-stage guide channel; 402, second-stage guide channel; 4021, first section; 4022, second section; 403, connecting channel; 5, limiting plate; 6, key; 601, unlocking section; 602, handle section; 6021, hinge; 60211, first connecting end; 60212, second connecting end; 60213, first opening; 60214, second opening; 60215, first connecting plate; 60216, second connecting plate; 60217, second gap; 6022, connecting shaft; 603, hinge seat; 6031, plate; 6032, pin shaft; 6033, third gap; 6034, fixed shaft; 7, groove; 8, baffle; 9, first gap; 10, connecting piece; 11, connecting plate; 12, first connecting hole; 13, step; X, axial direction; Y, first direction. DETAILED DESCRIPTION
[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.
[0036] In life, a lock hole is arranged on a door lock, which is exposed to the outside, facilitating opening with a key. However, a thief can also easily find the lock hole and open the lock to steal. The lock hole is exposed on the surface of the lock body, and the anti-theft effect is poor.
[0037] In the related art, a shielding piece is used to shield the lock cylinder to achieve the hiding effect of the lock hole, reduce the probability of being found by a thief, and increase the difficulty for the thief to use a tool to open the lock, thereby improving the anti-theft effect. However, when a user uses a key to open the lock, the key cannot be inserted into the lock hole in a front direction due to the shielding of the shielding piece, which increases the difficulty of inserting the key into the lock hole and affects the user's use of the key to open the lock. To solve the problem of inconvenient opening by the user, the present application provides a door lock, a lock, and a security door.
[0038] The following will be described in detail with reference to the accompanying drawings. Figures 1 to 11, describe the embodiments of the present application.
[0039] According to the embodiments of the present application, in one aspect, a door lock is provided, comprising: a lock cylinder 1, a base 2 and a guide sleeve 4.
[0040] Specifically, the lock cylinder 1 is arranged in the door panel, the base 2 is arranged on the door panel, the base 2 is provided with a through hole 3, the through hole 3 is arranged corresponding to the lock hole 102 of the lock cylinder 1, the guide sleeve 4 is provided with a first level guide channel 401, a second level guide channel 402 and a connecting channel 403 in sequence along the axial direction X, one end of the lock cylinder 1 provided with the lock hole 102 is arranged in the connecting channel 403, the diameter of the first level guide channel 401 far away from the connecting channel 403 is larger than the diameter of the second level guide channel 402 far away from the connecting channel 403, the first cross section of the second level guide channel 402 close to the lock cylinder 1 is circular, the diameter of the first cross section is equal to the diagonal of the lock hole 102, and the second level guide channel 402 is used for guiding the key 6 into the lock hole 102.
[0041] The base 2 is arranged on the door panel, the lock hole 102 of the lock cylinder 1 corresponds to the through hole 3 of the base 2, as shown in Figure 3 , in the process of unlocking, the user first inserts the key 6 into the first level guide channel 401, the size of the first level guide channel 401 is larger than the size of the key 6, so that the key 6 can easily enter the first level guide channel 401.
[0042] As shown in Figure 3 and Figure 6 , the first cross section of the second level guide channel 402 close to the lock hole 102 is circular, the first cross section is perpendicular to the axial direction X of the guide sleeve 4, the cross section of the lock hole 102 is rectangular, and the diameter of the cross section of the second level guide channel 402 is equal to the diagonal of the cross section of the lock hole 102, so that the key 6 can be accurately inserted into the lock hole 102 in the process of moving along the first level guide channel 401 to the lock hole 102 under the guidance of the second level guide channel 402, and then the key 6 is rotated to unlock, thereby reducing the difficulty of unlocking for the user.
[0043] It should be further explained that, as shown in Figure 3 and Figure 6 , the four corners of the rectangle are located on the circular edge to form a circumscribed rectangle, the key 6 matches the lock hole 102, when the key 6 abuts against the lock cylinder 1, the four corners of the key 6 close to the lock cylinder 1 abut against the inner wall of the second level guide channel 402, so that the axis of the key 6 coincides with the axis of the second level guide channel 402, thus the key 6 can rotate around the central axis of the second level guide channel 402 by rotating the key 6, the key 6 can be aligned with the lock hole 102 by slightly rotating, the user applies pressure to the key 6 in the process of rotating, and when the key 6 is aligned with the lock hole 102, the key 6 can be inserted into the lock hole 102.
[0044] In one embodiment, as shown in Figure 3 The second-stage guide channel 402 comprises a first section 4021 and a second section 4022 which are in communication with each other, the first section 4021 is close to the lock cylinder 1 and in communication with the connecting channel 403, and the second section 4022 is in communication with the first-stage guide channel 401 and gradually narrows from the first-stage guide channel 401 to the connecting channel 403.
[0045] The size of the first-stage guide channel 401 is larger than that of the key 6, facilitating the insertion of the key 6 and guiding the key 6 into the second section 4022 of the second-stage guide channel 402, which gradually narrows when extending from the second section 4022 to the first section 4021, facilitating the guiding of the key 6 from the second section 4022 to the first section 4021, and the first section 4021 can guide the key 6 into the lock hole 102.
[0046] Specifically, a step 13 is formed between the end of the first section 4021 close to the lock hole 102 and the end of the connecting channel 403, and one end of the lock cylinder 1 abuts against the step 13.
[0047] Specifically, the second cross section of the first section 4021 perpendicular to the axial direction X is the same as the first cross section.
[0048] In one embodiment, as shown in Figure 2 and Figure 4 The outer wall of the guide sleeve 4 is provided with a limiting plate strip 5 which extends along the axial direction X of the guide sleeve 4 and abuts against the end of the through hole 3 close to the first-stage guide channel 401. The end of the first-stage guide channel 401 away from the second-stage guide channel 402 corresponds to the through hole 3, the limiting plate strip 5 abuts against the base 2, and the base 2 can press the guide sleeve 4 tightly in the door plate through the limiting plate strip 5, thereby pressing the lock cylinder 1 tightly and limiting the movement of the lock cylinder 1.
[0049] In one embodiment, a plurality of limiting plate strips 5 are provided, and the plurality of limiting plate strips 5 are arranged in parallel and distributed along the circumferential direction of the guide sleeve 4. The plurality of limiting plate strips 5 all abut against the base 2, improving the stability of the base 2 in pressing the lock cylinder 1 tightly.
[0050] In one embodiment, as shown in Figure 5 At least one limiting plate strip 5 is provided with a plurality of grooves 7 which are distributed along the axial direction X of the guide sleeve 4.
[0051] It should be explained that in order to meet various sizes of door plates, the size of the guide sleeve 4 produced will be slightly larger, and after the installation of the lock cylinder 1 and the guide sleeve 4 is completed, the guide sleeve 4 will protrude out of the door plate by a certain length, and the excess guide sleeve 4 needs to be cut off at the grooves 7, which can ensure the accuracy of the cutting.
[0052] It should be noted that, as shown in Figure 5 The limiting plate strip 5 is provided with a digital scale, which represents the distance from the position to the lock hole 102. The marked digital scale can clearly know the distance from the cutting position to the lock hole 102.
[0053] In one embodiment, as shown in Figure 4 The side wall of the guide sleeve 4 is connected with a connecting plate 11, the connecting plate 11 is provided with a first connecting hole 12, the lock cylinder 1 is provided with a second connecting hole corresponding to the first connecting hole 12, and the guide sleeve 4 and the lock cylinder 1 are connected through the connecting piece 10 inserted into the first connecting hole 12 and the second connecting hole.
[0054] Specifically, the connecting piece 10 is a screw or a bolt, the second connecting hole is a threaded hole, and the screw or the bolt is screwed through the first connecting hole 12 and the second connecting hole to fixedly connect the guide sleeve 4 and the lock cylinder 1.
[0055] According to the embodiment of the present application, on the other hand, a lock is also provided, which comprises a key 6, a baffle 8 and a door lock. The baffle 8 is connected to the base 2 and used for shielding the through hole 3. A first gap 9 is formed between the baffle 8 and the through hole 3. The key 6 comprises an unlocking section 601. The unlocking section 601 penetrates into the first gap 9 and is inserted into the lock hole 102 through the first level guide channel 401 and the second level guide channel 402 in sequence.
[0056] The baffle 8 is arranged on the base 2. The baffle 8 can shield the through hole 3, and the first gap 9 is formed between the baffle 8 and the through hole 3. The key 6 penetrates into the through hole 3 through the first gap 9 and is then inserted into the lock hole 102.
[0057] When a user needs to unlock, the unlocking section 601 is first inserted into the first gap 9 and the through hole 3. The key 6 enters the first level guide channel 401 through the through hole 3. The size of the first level guide channel 401 is greater than the size of the key 6, so that the key 6 can easily enter the first level guide channel 401.
[0058] The first cross section of the second level guide channel 402 close to the lock hole 102 is circular, and the first cross section is perpendicular to the axial direction X of the guide sleeve 4. The cross section of the lock hole 102 is rectangular, and the cross section is perpendicular to the axial direction X. The diameter of the first cross section of the second level guide channel 402 is equal to the diagonal line of the cross section of the lock hole 102. Therefore, during the movement of the unlocking section 601 along the first level guide channel 401 to the lock hole 102, the unlocking section 601 can be accurately inserted into the lock hole 102 under the guidance of the second level guide channel 402. Then, the key 6 is rotated to unlock, thereby reducing the unlocking difficulty of the user.
[0059] The baffle 8 is connected to the base 2 to shield the through hole 3, so as to reduce the probability of the lock hole 102 being found and reduce the risk of theft. The first gap 9 is formed between the baffle 8 and the base 2, and the through hole 3 is located in the first gap 9. When the thief opens the lock by using the opening tool, the opening tool needs to be inserted into the lock hole 102 from the first gap 9, so as to increase the difficulty of opening the lock and improve the anti-theft effect.
[0060] Specifically, the baffle 8 can also be used as a handle to facilitate opening the door.
[0061] In an embodiment, the key 6 further includes a handle section 602, which is rotationally connected with the opening section 601, so as to facilitate the insertion of the opening section 601 into the lock hole 102 through the first gap 9.
[0062] In an embodiment, the handle section 602 includes a plurality of hinged pieces 6021, which are hingedly connected with each other, and the handle section 602 can be inserted into the first-stage guide channel 401.
[0063] Specifically, as shown in Figure 8 and Figure 9 , the handle section 602 includes a plurality of hinged pieces 6021 and a plurality of connecting shafts 6022. Each hinged piece 6021 is provided with opposite first and second connecting ends 60211 and 60212. The first connecting end 60211 is provided with a first opening hole 60213, and the second connecting end 60212 is provided with a second opening hole 60214. The connecting shaft 6022 is inserted into the second opening hole 60214 of one hinged piece 6021 and the first opening hole 60213 of the hinged piece 6021 adjacent to the one hinged piece 6021, so as to hinge the adjacent two hinged pieces 6021. The first opening hole 60213 of the first hinged piece 6021 is hinged with the opening section 601. Each connecting shaft 6022 is arranged along the first direction Y, and the first direction Y is perpendicular to the axial direction X.
[0064] It should be noted that, as shown in Figure 8 and Figure 9 , the plurality of hinged pieces 6021 are connected by the connecting shaft 6022, and the adjacent two hinged pieces 6021 can rotate relative to each other. The rotation surface of the hinged piece 6021 is perpendicular to the first direction Y. Therefore, the handle section 602 formed by the plurality of hinged pieces 6021 is flexible on the rotation surface perpendicular to the first direction Y and rigid on the rotation surface perpendicular to the axial direction X. Therefore, when the opening section 601 is inserted into the lock hole 102, the handle section 602 is flexible, which facilitates the insertion of the opening section 601 into the lock hole 102. The opening section 601 rotates on the rotation surface perpendicular to the axial direction X. When the opening section 601 is rotated to open the lock, the handle section 602 is rigid, which can rotate the opening section 601.
[0065] Specifically, as shown in Figure 10As shown, the hinge 6021 includes a first connecting plate 60215 and a second connecting plate 60216. The first connecting plate 60215 and the second connecting plate 60216 have a Z-shaped structure and are arranged symmetrically about the X-axis. One end of the first connecting plate 60215 and the second connecting plate 60216 abuts and is fixedly connected to form a first connecting end 60211, and the other end is arranged at intervals to form a second gap 60217.
[0066] like Figure 8 As shown, the first connecting end 60211 of a plurality of hinge members 6021 and the second gap 60217 of the adjacent hinge member 6021 are hinged by a connecting shaft 6022.
[0067] The first connecting end 60211 of the hinge 6021 is inserted into the second gap 60217 of the adjacent hinge 6021 for connection.
[0068] In one embodiment, such as Figure 8 As shown, the key 6 also includes a hinge seat 603, which has a fixed end and a hinge end. The fixed end is fixedly connected to the unlocking section 601, and the hinge end is hinged to the first opening 60213 of the hinge member 6021.
[0069] The fixed end of the hinge seat 603 is fixed to the unlocking section 601, and the hinge end is hinged to the first hinge piece 6021, which facilitates the connection between the handle section 602 and the unlocking section 601.
[0070] In one embodiment, such as Figure 9 As shown, the hinge base 603 includes two plates 6031 and a pin 6032. The two plates 6031 are arranged opposite each other and each has a first end and a second end. The first ends of the two plates 6031 are respectively fixed to both sides of the unlocking section 601. A third gap 6033 is formed between the second ends of the two plates 6031. The second ends of the two plates 6031 are respectively provided with through holes. The first connecting end 60211 of the hinge member 6021 passes through the third gap 6033. The through holes and the first opening 60213 are connected by the pin 6032. Both the through holes and the first opening 60213 are rotatably connected to the pin 6032.
[0071] In one embodiment, the hinge base 603 further includes a fixing shaft 6034. The first ends of the two plates 6031 are provided with first fixing holes, and the unlocking section 601 is provided with a second fixing hole corresponding to the first fixing hole. The fixing shaft 6034 is inserted into the first fixing hole and the second fixing hole to fix the two plates 6031 to the unlocking section 601.
[0072] According to the embodiment of the present application, the other aspect further provides a security door, comprising a door panel and a lockset, the base 2 is installed on the door panel, the door panel is provided with an installation slot, the lock cylinder 1 is installed in the installation slot, and the slot opening of the installation slot is arranged opposite to the through hole 3.
[0073] Specifically, the lock cylinder 1 is further provided with a fixing member, the fixing member passes through the installation hole 101 to fix the lock cylinder 1 on the door panel.
[0074] Specifically, the fixing member can be a screw or a bolt, the screw or the bolt passes through the installation hole 101 to fix the lock cylinder 1 on the door panel.
[0075] The following describes an embodiment in combination with the drawings. Figures 1 to 11 The above all solutions are comprehensively described.
[0076] In the process of unlocking by the user, the unlocking section 601 of the key 6 is inserted into the through hole 3 from the first gap 9 and enters the first level guide channel 401, the size of the first level guide channel 401 is greater than that of the unlocking section 601, so that the unlocking section 601 can easily enter the first level guide channel 401 and continue to extend along the first level guide channel 401 to reach the second section 4022, the second section 4022 gradually narrows when extending to the first section 4021, and can guide the unlocking section 601 into the first section 4021, the second cross section of the first section 4021 is the same as the first cross section, and the cross section of the keyhole 102 is rectangular, four corners of the rectangle are located on the circular edge to form a circle-inscribed rectangle, the unlocking section 601 matches the keyhole 102, when the unlocking section 601 abuts against the lock cylinder 1, four corners of the end of the unlocking section 601 close to the lock cylinder 1 abut against the inner wall of the second level guide channel 402, so that the axis of the key 6 coincides with the axis of the second level guide channel 402, therefore, the unlocking section 601 can rotate around the central axis of the second level guide channel 402 by rotating the handle section 602 to drive the unlocking section 601 to rotate, the unlocking section 601 can be aligned with the keyhole 102 by slightly rotating, the user applies pressure to the unlocking section 601 during the rotation process, and when the unlocking section 601 is aligned with the keyhole 102, the unlocking section 601 can be inserted into the keyhole 102.
[0077] Although the embodiments of the present application are described in combination with the drawings, various modifications and variations can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and variations all fall within the scope defined by the appended claims.
Claims
1. A door lock characterized by comprising: The door lock comprises a lock core (1) provided with a lock hole (102), a base (2) provided with a through hole (3) corresponding to the lock hole (102) of the lock core (1), and a guide sleeve (4) provided with a first-stage guide channel (401), a second-stage guide channel (402) and a connecting channel (403) in sequence along an axial direction (X) of the guide sleeve (4), wherein one end of the lock core (1) provided with the lock hole (102) is inserted into and mounted in the connecting channel (403), the first-stage guide channel (401) is provided with a diameter larger than that of the second-stage guide channel (402) at an end away from the connecting channel (403), and the second-stage guide channel (402) is provided with a circular first cross section at an end close to the lock core (1), and the diameter of the first cross section is equal to a diagonal line of the lock hole (102), so that the second-stage guide channel (402) is used for guiding a key (6) into the lock hole (102). The second-stage guide channel (402) comprises a first segment (4021) close to the lock core (1) and a second segment (4022) in communication with the first-stage guide channel (401), and the second segment (4022) is gradually narrowed from the first-stage guide channel (401) to the connecting channel (403). The outer wall of the guide sleeve (4) is provided with a limiting baffle (5) extending along the axial direction (X) of the guide sleeve (4) and abutting against an end of the through hole (3) close to the first-stage guide channel (401). A plurality of limiting baffles (5) are arranged in parallel and are distributed along a circumferential direction of the guide sleeve (4).
2. The door latch of claim 1, wherein At least one limiting baffle (5) is provided with a plurality of grooves (7) distributed along the axial direction (X) of the guide sleeve (4).
3. The door latch of claim 1, wherein The guide sleeve (4) is connected with a connecting plate (11) provided with a first connecting hole (12), the lock core (1) is provided with a second connecting hole corresponding to the first connecting hole (12), and the guide sleeve (4) and the lock core (1) are connected through the connecting piece (10) inserted into the first connecting hole (12) and the second connecting hole.
4. The door latch of claim 3, wherein The door lock comprises a key (6), a baffle (8) connected to the base (2) for shielding the through hole (3), and a first gap (9) between the baffle (8) and the through hole (3).
5. The door latch defined in claim 4, characterised in that The key (6) comprises an unlocking segment (601) inserted into the first gap (9) and sequentially penetrating through the first-stage guide channel (401) and the second-stage guide channel (402) and being inserted into the lock hole (102).
6. The door lock according to any one of claims 1 to 5, characterized in that 7. A lock, characterized in that 8. The lock of claim 7, wherein, The key (6) further comprises a handle section (602) which is rotationally connected with the unlocking section (601) to enable the unlocking section (601) to be inserted into the lock hole (102) through the first gap (9).
9. The lock of claim 8, wherein, The handle section (602) comprises a plurality of articulated members (6021) which are articulatedly connected with each other, and the handle section (602) can be inserted into the first-stage guide channel (401).
10. A security door comprising: Comprise: The lock as claimed in any one of claims 7 to 9, wherein the base (2) is mounted on a door panel, the door panel is provided with a mounting groove, the lock cylinder (1) is mounted in the mounting groove, and the opening of the mounting groove is arranged opposite to the through hole (3).