A safety door lock

Abstract

The utility model discloses a safety door lock, which relates to the technical field of locks, including a base, a lock body and a locking piece, the base is provided with a handle and a lock core, the lock body includes an active piece, a linkage piece and a passive piece, the linkage piece is provided with a tooth portion, the tooth portion is respectively meshed with the active piece and the passive piece, and the linkage piece and the base are connected by a tension spring; when the safety door lock is in an unlocked state, one end of the locking piece presses and touches the upper surface of the tooth portion, the tension spring is deformed and is in a compressed state, so that the tooth portion is respectively meshed with the active piece and the passive piece, and at this time, the lock body can be controlled by the handle; when the shift block rotates to drive the locking piece to rotate, one end of the locking piece is disengaged from the tooth portion, the tension spring drives the linkage piece to move in a direction away from the active piece, the tooth portion is respectively disengaged from the active piece and the passive piece, and the safety door lock enters an anti-locked state. At this time, the door handle cannot control the rotation of the lock body, so as to prevent the door handle from being subjected to violence during anti-locking, thereby causing damage to the lock body, reducing damage to the components of the door lock, and improving the safety performance of the door lock.

Description

Technical Field

[0001] The utility model relates to the technical field of locks, in particular to a safety door lock. Background Art

[0002] Generally, handle-type mechanical locks have a better appearance than traditional mechanical locks and are widely used in home and commercial scenarios. The handle-type mechanical lock is mainly composed of a door handle, a lock body, a lock cylinder and other parts. The door handle and the key are inserted into the lock cylinder to control the unlocking and locking of the lock body. At present, the anti-locking of the handle-type mechanical lock is achieved by the anti-locking lock tongue penetrating into the lock groove. When the door handle is subjected to violent impact and the lock body is damaged, the security of the door lock is not high enough. Utility Model Content

[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art, to provide a safety door lock, and to improve the safety performance of the door lock.

[0004] According to an embodiment of the utility model, a safety door lock is provided, comprising: a base, a lock body and a locking member, the base is provided with a handle and a lock core, the handle is rotatably connected to the base, and the lock core is provided with a shift block; the lock body is rotatably connected to the base, comprising an active member, a linkage member and a passive member, the linkage member is provided with a tooth portion, the tooth portion is respectively engaged with the active member and the passive member, the handle can drive the active member to rotate, a tension spring is provided between the linkage member and the base, and the tension spring can drive the linkage member to move in a direction away from the active member; the locking member is rotatably connected to the base, one end of the locking member can press and touch the upper surface of the tooth portion, so that the tooth portion is respectively engaged with the active member and the passive member, the safety door lock is in an unlocked state, the handle can drive the passive member to rotate; the shift block can drive the locking member to rotate, so that one end of the locking member is separated from the tooth portion, so that the tension spring drives the tooth portion to contact and engage with the active member and the passive member respectively, and the safety door lock is in an anti-locked state.

[0005] The safety door lock described in the utility model has at least the following beneficial effects: the embodiment is provided with a base, a lock body and a locking member, the base is provided with a handle and a lock core, the handle, the lock body and the locking member are rotatably connected to the base respectively, the lock body includes an active member, a linkage member and a passive member, the linkage member is provided with a tooth portion, the tooth portion is respectively engaged with the active member and the passive member, and the linkage member and the base are connected by a tension spring; when the safety door lock is in an unlocked state, one end of the locking member presses against the upper surface of the tooth portion so that the tooth portion is respectively engaged with the active member and the passive member, and the tension spring is in a deformed state, at this time , turning the handle can drive the passive part to rotate, and the lock body can be controlled by the handle; when the lock core drives the shift block to rotate, the shift block drives the locking part to rotate, so that one end of the locking part is disengaged from the tooth portion, and the tension spring drives the linkage part to move in a direction away from the active part, so that the teeth are disengaged from the active part and the passive part respectively, and the safety door lock enters the reverse lock state; the teeth are disengaged from the active part and the passive part, so that the door handle cannot control the rotation of the passive part, thereby preventing the door handle from being damaged by violence when reverse locking, reducing damage to the components of the door lock, and improving the safety performance of the door lock.

[0006] According to a safety door lock described in the utility model, the linkage member is provided with an abutment sheet, the abutment sheet is located on a side of the tooth portion close to the locking member, and one end of the locking member abuts against an upper surface of the abutment sheet.

[0007] According to a safety door lock described in the utility model, the locking member includes a rotating shaft, an active column and a passive column, the active column and the passive column are respectively located at two ends of the rotating shaft, the passive column is used to press the upper surface of the tooth portion, and the shift block can push the active column to rotate in a vertical plane, thereby driving the passive column to rotate and disengage from the tooth portion.

[0008] According to a safety door lock described in the utility model, the base is provided with a first limiting plate and a second limiting plate, the locking member is located between the first limiting plate and the second limiting plate, the first limiting plate is provided with a rotation groove, and the rotating shaft is located in the rotation groove.

[0009] According to a safety door lock described in the utility model, the second limiting plate is arranged with a first groove and a second groove at intervals, the active column passes through the first groove and is located at one end of the first groove, the passive column passes through the second groove and is located at one end of the second groove, and the length of the second groove is greater than the length of the passive column.

[0010] According to a safety door lock described in the utility model, the length of the first groove is smaller than the length of the active column, and the shift block can push the active column to rotate in a vertical plane, thereby driving the passive column to rotate so that the passive column presses against the upper surface of the tooth portion.

[0011] According to a safety door lock described in the utility model, the second limiting plate is provided with a guide hole, and the linkage member passes through the guide hole and can move along the guide hole.

[0012] According to a safety door lock described in the utility model, the linkage member is provided with a mounting hole, one end of the tension spring passes through the mounting hole and abuts against the lower wall surface of the linkage member, and the other end abuts against the upper surface of the second limiting plate.

[0013] According to a safety door lock described in the utility model, a connecting portion is provided on the upper surface of the passive component, and a connecting tube is provided on the lower surface of the second limiting plate. The connecting portion is located inside the connecting tube, and the lower end surface of the connecting tube contacts the upper surface of the passive component.

[0014] According to a safety door lock described in the utility model, the active component is provided with a connecting hole, the handle passes through the connecting hole, the inner wall of the connecting hole is provided with a convex key, the handle is provided with a groove, and the convex key is located in the groove.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0017] Figure 1 An exploded view of a safety door lock in an embodiment of the utility model;

[0018] Figure 2 This is an axonometric view of a safety door lock in an embodiment of the utility model;

[0019] Figure 3 A top view of a safety door lock in an embodiment of the utility model;

[0020] Figure 4 for Figure 3 Sectional view of AA in the middle;

[0021] Figure 5 for Figure 4 A partial enlarged view of the B area;

[0022] Figure 6 This is an axonometric view of a locking member in an embodiment of the utility model;

[0023] Figure 7 An axonometric view of a linkage member and a tension spring in an embodiment of the utility model.

[0024] Reference numerals:

[0025] Base 100; handle 110; groove 111; fixing sleeve 112; lock core 120; shift block 121; first limit plate 130; rotation groove 131; second limit plate 140; first groove 141; second groove 142; guide hole 143; connecting pipe 144;

[0026] Lock body 200; active member 210; connecting hole 211; convex key 212; linkage member 220; tooth portion 221; abutment piece 222; mounting hole 223; passive member 230; connecting portion 231;

[0027] Locking member 300; active column 310; rotating shaft 320; passive column 330;

[0028] Extension spring 400. DETAILED DESCRIPTION

[0029] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0030] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0033] Reference Figures 1 to 4The embodiment of the utility model provides a safety door lock, including a base 100, a lock body 200 and a locking member 300. The base 100 is provided with a handle 110 and a lock core 120. The handle 110 is rotatably connected to the base 100. The lock core 120 is provided with a shift block 121. The shift block 121 can be driven to rotate by a key. The lock body 200 is rotatably connected to the base 100. The lock body 200 includes an active member 210, a linkage member 220 and a passive member 230. The handle 110 is connected to the active member 210. The handle 110 can drive the active member 210 to rotate; the linkage member 2 ... There is a tooth portion 221, which is respectively engaged with the active member 210 and the passive member 230. The linkage member 220 is penetrated by the base 100. A tension spring 400 is provided between the linkage member 220 and the base 100. The tension spring 400 can drive the linkage member 220 to move in a direction away from the active member 210; the locking member 300 is rotatably connected to the base 100, and one end of the locking member 300 can press and contact the upper surface of the tooth portion 221 so that the tooth portion 221 is respectively engaged with the active member 210 and the passive member 230; the rotation of the shift block 121 can drive the locking member 300 to rotate in a vertical plane.

[0034] When a safety door lock is in an unlocked state, one end of the locking member 300 presses against the upper surface of the tooth portion 221 so that the tooth portion 221 engages with the active member 210 and the passive member 230 respectively, and the tension spring 400 is in a deformed state. At this time, the passive member 230 can be driven to rotate by rotating the handle 110, and the lock body 200 can be controlled by the handle 110. The locking member 300 is driven to rotate by rotating the paddle so that one end of the locking member 300 is disengaged from the tooth portion 221, and the tension spring 400 is used to restore the deformation so that the tension spring 400 drives the linkage member 220 to move in a direction away from the active member 210, thereby disengaging the tooth portion 221 of the linkage member 220 from the active member 210 and the passive member 230 respectively. A safety door lock of an embodiment of the utility model enters an anti-locking state. At this time, the passive member 230 cannot be driven to rotate by rotating the handle 110, and the door lock cannot be controlled by the handle 110. When the door handle 110 is subjected to a violent impact, the passive member 230 and other components of the lock body 200 are not damaged, and the lock tongue and other components of the door lock cannot be damaged by destroying the door handle 110, thereby protecting other components in the door lock and improving the safety of the door lock.

[0035] Reference Figure 5 and Figure 7In some embodiments of the present invention, the linkage member 220 is provided with an abutment sheet 222, which is located on the side of the tooth portion 221 close to the locking member 300, and one end of the locking member 300 abuts against the upper surface of the abutment sheet 222. By abutting against the abutment sheet 222 at one end of the locking member 300, the contact area between the linkage member 220 and the locking member 300 is increased, ensuring that the locking member 300 can abut against the linkage member 220, and ensuring the stability of the unlocked state of the door lock. It can be understood that the abutment sheet 222 is directly sleeved on the linkage member 220, and the abutment sheet 222 can reduce the wear between the tooth portion 221 and the locking member 300, so as to increase the service life of the locking member 300 and the linkage member 220.

[0036] It is understandable that the material of the abutment sheet 222 can be polyethylene (PE), plastic, rubber, etc. The polyethylene material has good wear resistance and corrosion resistance. The material of the abutment sheet 222 can be selected according to the actual application, and this application is not limited here.

[0037] Reference Figure 1 , Figure 4 and Figure 6 In some embodiments of the present invention, the locking member 300 includes a rotating shaft 320, an active column 310 and a passive column 330. The active column 310 and the passive column 330 are respectively located at two ends of the rotating shaft 320. The passive column 330 is used to press the upper surface of the tooth portion 221. The rotation of the shift block 121 can push the active column 310 to rotate in the vertical plane, thereby driving the passive column 330 to rotate in the vertical plane, so as to drive the passive column 330 to disengage from or press the tooth portion 221. The rotation of the shift block 121 drives the rotation of the active column 310 to drive the passive column 330 to disengage from or press the tooth portion 221, thereby adjusting a safety door lock to be in an unlocked or locked state.

[0038] Reference Figure 1 , Figure 4 and Figure 5 In some embodiments of the utility model, the base 100 is provided with a first limit plate 130 and a second limit plate 140. In the vertical direction, the first limit plate 130 is located above the second limit plate 140. A rotation groove 131 is provided on the surface of the first limit plate 130 close to the second limit plate 140. The rotating shaft 320 of the locking member 300 is located in the rotation groove 131. The locking member 300 can rotate in the rotation groove 131 so that the rotation of the locking member 300 in the vertical plane is more stably.

[0039] Reference Figure 1 , Figure 3 and Figure 4Optionally, the second limiting plate 140 is alternately arranged with a first groove 141 and a second groove 142, the active column 310 passes through the first groove 141 and is located at one end of the first groove 141, and the passive column 330 passes through the second groove 142 and is located at one end of the second groove 142; the active column 310 passes through the first groove 141 and the passive column 330 passes through the second groove 142, so as to realize the positioning of the locking member 300 in the axial direction of the rotating shaft 320; the active column 310 is located at one end of the first groove 141 and the passive column 330 is located at one end of the second groove 142 to limit the rotation direction of the locking member 300.

[0040] It can be understood that the length of the second groove 142 is greater than the length of the passive column 330. When the safety door lock is in an anti-locked state, the passive column 330 is received in the second groove 142 to prevent the passive column 330 from affecting the linkage part 220 to move in a direction away from the active part 210, thereby ensuring that the safety door lock is in an anti-locked state.

[0041] It can be understood that the length of the first slot 141 is smaller than the length of the active pillar 310 . When the locking cam 310 is in the unlocked state, the first locking cam 310 is in the unlocked state, and the second ... The length of the first slot 141 is smaller than the length of the active column 310 , so that the rotating dial block 121 can adjust a safety door lock to an unlocked state or an anti-locked state.

[0042] It can be understood that the first direction can be a clockwise direction, in which case the opposite direction of the first direction is a counterclockwise direction; the first direction can also be a counterclockwise direction, in which case the opposite direction of the first direction is a clockwise direction. The specific direction of the first direction can be set according to the specific positions of the locking piece 300, the first groove 141, and the second groove 142, and this application is not limited here.

[0043] Reference Figure 4 and Figure 5Optionally, the second limiting plate 140 is provided with a guide hole 143, and the guide hole 143 is arranged in the vertical direction. The linkage member 220 passes through the guide hole 143 and can move along the guide hole 143 to ensure the stability of the movement of the linkage member 220 driven by the tension spring 400, so as to ensure that the passive column 330 presses the tooth portion 221, so that the tooth portion 221 moves closer to the active member 210 more stably.

[0044] Reference Figure 4 and Figure 5 Optionally, the linkage member 220 is provided with a mounting hole 223, one end of the tension spring 400 passes through the mounting hole 223 and abuts against the lower wall surface of the linkage member 220, and the other end of the tension spring 400 abuts against the upper surface of the second limiting plate 140, so that when the linkage member 220 moves along the guide hole 143 close to the active member 210, the tension spring 400 can be deformed.

[0045] Reference Figure 1 , Figure 4 and Figure 5 Optionally, a connecting portion 231 is provided on the upper surface of the passive component 230, and a connecting tube 144 is provided on the lower surface of the second limiting plate 140. The connecting portion 231 is sleeved on the inner wall of the connecting tube 144 to realize the rotational connection of the passive component 230 to the base 100. The lower end surface of the connecting tube 144 contacts the upper surface of the passive component 230 to limit the movement of the passive component 230 in the vertical direction, ensuring that the tooth portion 221 can engage with the passive component 230.

[0046] Reference Figure 1 and Figure 4 The active member 210 is provided with a connecting hole 211, the handle 110 passes through the connecting hole 211, the inner wall of the connecting hole 211 is provided with a convex key 212, the handle 110 is provided with a groove 111, and the convex key 212 is located in the groove 111, so that the handle 110 can drive the active member 210 to rotate.

[0047] Reference Figure 4 and Figure 5 Optionally, the handle 110 is provided with a fixing sleeve 112, which is detachably connected to the handle 110, and the two ends of the fixing sleeve 112 respectively abut against the second limiting plate 140 and the active member 210, and the fixing sleeve 112 limits the movement of the active member 210 in the vertical direction to ensure that the tooth portion 221 can engage with the active member 210.

[0048] It is understandable that the fixing sleeve 112 can be made of polyethylene, rubber or other materials. Polyethylene has good wear resistance to reduce the wear between components when the handle 110 drives the active part 210 to rotate, thereby increasing the service life of the components. The material of the fixing sleeve 112 can be selected according to actual production, and this application does not limit it here.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0050] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A safety door lock, characterized in that: include: The base is provided with a handle and a lock core, the handle is rotatably connected to the base, and the lock core is provided with a shift block; The lock body is rotatably connected to the base, and comprises an active part, a linkage part and a passive part. The linkage part is provided with a tooth portion, and the tooth portion is respectively engaged with the active part and the passive part. The handle can drive the active part to rotate. A tension spring is provided between the linkage part and the base, and the tension spring can drive the linkage part to move in a direction away from the active part. A locking member is rotatably connected to the base, one end of the locking member can press against the upper surface of the tooth portion so that the tooth portion engages with the active member and the passive member respectively, and the safety door lock is in an unlocked state, and the handle can drive the passive member to rotate; the rotation of the shift block can drive the locking member to rotate, so that one end of the locking member is disengaged from the tooth portion, so that the tension spring drives the tooth portion to contact and engage with the active member and the passive member respectively, and the safety door lock is in an anti-locked state.

2. A safety door lock according to claim 1, characterized in that: The linkage member is provided with an abutment sheet, and the abutment sheet is located on a side of the tooth portion close to the locking member, and one end of the locking member abuts against an upper surface of the abutment sheet.

3. A safety door lock according to claim 1, characterized in that: The locking member includes a rotating shaft, an active column and a passive column, wherein the active column and the passive column are respectively located at two ends of the rotating shaft, and the passive column is used to press the upper surface of the tooth portion, and the shift block can push the active column to rotate in a vertical plane, thereby driving the passive column to rotate and disengage from the tooth portion.

4. A safety door lock according to claim 3, characterized in that: The base is provided with a first limiting plate and a second limiting plate, the locking member is located between the first limiting plate and the second limiting plate, the first limiting plate is provided with a rotation groove, and the rotating shaft is located in the rotation groove.

5. A safety door lock according to claim 4, characterized in that: The second limiting plate is alternately arranged with a first slot and a second slot, the active column passes through the first slot and is located at one end of the first slot, the passive column passes through the second slot and is located at one end of the second slot, and the length of the second slot is greater than the length of the passive column.

6. A safety door lock according to claim 5, characterized in that: The length of the first slot is smaller than the length of the active column, and the shift block can push the active column to rotate in a vertical plane, thereby driving the passive column to rotate, so that the passive column presses against the upper surface of the tooth portion.

7. A safety door lock according to claim 4, characterized in that: The second limiting plate is provided with a guide hole, and the linkage member passes through the guide hole and can move along the guide hole.

8. A safety door lock according to claim 7, characterized in that: The linkage member is provided with a mounting hole, one end of the tension spring passes through the mounting hole and abuts against the lower wall surface of the linkage member, and the other end abuts against the upper surface of the second limiting plate.

9. A safety door lock according to claim 4, characterized in that: A connecting portion is provided on the upper surface of the passive component, and a connecting pipe is provided on the lower surface of the second limiting plate. The connecting portion is located in the connecting pipe, and the lower end surface of the connecting pipe contacts the upper surface of the passive component.

10. A safety door lock according to claim 1, characterized in that: The active component is provided with a connecting hole, the handle is passed through the connecting hole, a convex key is provided on the inner wall of the connecting hole, the handle is provided with a groove, and the convex key is located in the groove.

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