Door lock capable of preventing door viewer unlocking

An anti-cat's eye and door lock technology, applied in the field of door locks, can solve the problems of low anti-theft performance of door locks, security loopholes, and not very prominent anti-theft performance of door locks, and achieve the effect of superior anti-theft performance.

Pending Publication Date: 2018-05-08
HUITAILONG DECORATION MATERIAL YUEXIU DIST GUANGZHOU
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AI-Extracted Technical Summary

Problems solved by technology

[0002] Most of the door locks are equipped with peepholes, which are used to observe the situation outside the door. At the same time, the door can be opened directly by pressing down the handle in the house, which brings great convenience to the user, but at the same time, it also allows criminals to take advantage of it. For example, a thief can use a tool to put the tool into the cat's eye, then put the tool on the handle, press the tool from the outside of the door, and the door will be opened, so the anti-theft performance of this kind of door lock is n...
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Abstract

A door lock capable of preventing door viewer unlocking comprises a lock face, a handle, a button, a spring, a torsion soring, a limiting lid, a limiting screw, a square bar sleeve and a limiting block. A mounting accommodating cavity is formed in the back of the lock face. A first fixing hole is formed in the outer side of the mounting accommodating cavity. One end of the handle is provided witha button accommodating cavity and a rotary shaft accommodating cavity. One end of the button is a touch pressing end, and the other end of the button is provided with a plurality of long convex ribs.The long convex ribs extend to the back of the touch pressing end. The button is arranged in the button accommodating cavity of the handle. The spring is arranged between the multiple long convex ribs. One end of the spring abuts against the button, and the other end of the spring abuts against the end face of the button accommodating cavity. The limiting lid comprises a lid face and a rotary shaft. One end of the rotary shaft is connected to the middle of the bottom face of the lid face. The door lock capable of preventing door viewer unlocking can be counter-locked by lifting the handle whether the button is pressed down or not and can only be unlocked after the button is pressed down, and the anti-theft performance is prominent.

Application Domain

Keyhole guardsHandle fasteners

Technology Topic

Anti theftEngineering +1

Image

  • Door lock capable of preventing door viewer unlocking
  • Door lock capable of preventing door viewer unlocking
  • Door lock capable of preventing door viewer unlocking

Examples

  • Experimental program(1)

Example Embodiment

[0035] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.
[0036] A door lock preventing cat's eye unlocking, comprising a lock face 1, a handle 2, a button 3, a spring 4, a torsion spring 5, a limit cover 6, a limit screw 7, a square sleeve 8 and a limit block 9;
[0037] The back of the lock surface 1 is provided with an installation cavity 11; the outside of the installation cavity 11 is provided with a first fixing hole 12;
[0038] One end of the handle 2 is provided with a button cavity 21 and a rotating shaft cavity 22;
[0039] One end of the button 3 is a touch end 31, and the other end of the button 3 is provided with a plurality of long ribs 32, and the plurality of long ribs 32 extend toward the back of the touch end 31; the button 3 is provided with In the button cavity 21 of the handle 2, the spring 4 is arranged between a plurality of long ribs 32, one end of which is against the button 3, and the other end is against the end surface of the button cavity 21;
[0040] The limit cover 6 includes a cover surface 61 and a rotating shaft 62. One end of the rotating shaft 62 is connected to the middle part of the bottom surface of the cover surface 61, and an action rib 63 is provided at the edge of the bottom surface of the cover surface 61. The rotating shaft The outer edge of 62 is provided with a plurality of locking grooves 64, and the locking grooves 64 are parallel to the axis of the rotating shaft 62; the rotating shaft 62 is provided with a clutch through hole 65 along the axial direction;
[0041] The square bar sleeve 8 includes a cylindrical tube 81 and a limiting plate 82, the limiting plate 82 is arranged at one end of the cylindrical tube 81, and is perpendicular to the central axis of the cylindrical tube 81; the limiting plate 82 One end of the stop plate 82 is set as a blocking end 821, and the other end of the limiting plate 82 is provided with a follow-up rib 822, the follow-up rib 822 is perpendicular to the limit plate 82, and the follow-up rib 822 faces The other end of the cylindrical barrel 81 extends; the other end of the cylindrical barrel 81 is provided with a plurality of clutch grooves 811; One fixing hole 12 is relatively 180°;
[0042] The stop screw 7 is installed in the first fixing hole 12, the torsion spring 5 is set outside the installation cavity 11, and the two pins of the torsion spring 5 are stuck on the stop screw 7 Above, the rotating shaft 62 of the limit cover 6 passes through the installation cavity 11 and the rotating shaft cavity 22 and is fixedly connected with the handle 2, and the action rib 63 on the cover surface 61 is stuck on the torsion spring 5 between the two pins; the other end of the cylinder 81 does not cross the other end of the shaft 62;
[0043] The cylindrical tube 81 is arranged in the clutch through hole 65, and one end of the limit plate 82 of the square sleeve 8 is pressed on the cover surface 61 but not crushed to death; Clamped between the two pins of the torsion spring 5, the blocking end 821 of the limiting plate 82 abuts against the limiting block 9; the clutch groove 811 is located in the slot 64 of the limiting cover 6 The radial rear of , corresponding to each other.
[0044]When the button 3 is not pressed, the button 3 is in the button cavity 21, and the long rib 32 on it can be inserted into the slot 64 on the rotating shaft 62, and the long rib 32 is axially connected to the slot 64. There is a travel space, because the axial direction of the square bar sleeve 8 is not crushed to death at this time, at this moment, the square bar sleeve 8 and the limit cover 6 can move independently of each other. At this time, when the handle 2 is pressed down (pressing the handle downward is the action of opening the door), because the limit cover 6 is fixedly connected with the handle 2, the downward movement of the handle 2 drives the limit cover 6 Rotate clockwise, the action rib 63 on the limit cover 6 drives a pin of the torsion spring 5 to rotate clockwise, but the square sleeve 8 remains motionless, so the action of opening the door cannot be realized at this time, so even at this time A thief can press down the handle 2 with a tool and cannot open the door. After releasing the hand, a pin of the torsion spring 5 is reset, driving the limit cover 6 to rotate counterclockwise until the two pins of the torsion spring 5 are stuck on the limit screw 7 again, and the handle 2 Reset again. When the handle 2 is lifted up, the limit cover 6 rotates counterclockwise with the handle 2. At this time, the limit block 9 and the blocking end 821 of the square sleeve 8 continue to abut against each other, and the square The bar sleeve 8 is turned counterclockwise, and the square bar sleeve 8 is equipped with a square bar, which is also called a square core, and the square bar is reversed, so that the lock body can be locked back, so the handle is lifted when the button 3 is not pressed. 2 can realize anti-locking.
[0045] When the button 3 is pressed, the long rib 32 of the button 3 penetrates into the slot 64 of the limit cover 6, the spring 4 is compressed, and the two ends of the button abut against the end surface of the button cavity 21 and the On the button 3, the engagement between the button 3 and the rotating shaft 62 is completed. In addition, the engagement between the button 3 and the clutch groove 811 of the square sleeve 8 is also completed. At this time, when the handle 2 is pressed (pressing the handle down is the door opening action), the clockwise rotation of the handle 2 drives the button 3 and the limit cover 6 to rotate clockwise, and the button 3 also drives the square bar The sleeve 8 rotates clockwise, so that the action rib 63 of the limit cover 6 and the follower rib 822 of the square sleeve 8 drive a pin of the torsion spring 5 to rotate clockwise, thereby realizing the action of opening the door. After releasing the hand, a pin of the torsion spring 5 is reset, driving the limit cover 6 and the square sleeve 8 to rotate counterclockwise until the two pins of the torsion spring 5 are stuck in the limit again. On the screw 7, the handle 2 is reset again. During the reset process, the spring 4 resumes to elongate at this time, so that the long rib 32 of the button 3 withdraws from the engagement with the clutch groove 811 of the square sleeve 8. When the handle 2 is lifted up, the limit cover 6 rotates counterclockwise with the handle 2. At this time, the limit block 9 and the square sleeve 8 continue to abut against each other, and the square sleeve 8 Turn counterclockwise, the square bar sleeve 8 is equipped with a square bar, the square bar is also called a square core, and the square bar is reversed, so that the lock body can be locked back, so the lifting handle 2 can also be realized when the button 3 is not pressed. Anti-lock.
[0046] Therefore, the door lock that prevents cat's eye unlocking can only be opened when the button 3 is pressed, and the door cannot be opened in other cases. The long rib 32 of the button 3 and the clutch groove of the square sleeve 8 The interlocking process between 811 actually realizes the function of clutch, and the door can be opened if they are interlocked, and the door will not be opened if they are not interlocked. In addition, no matter whether the button 3 is pressed or not, the stop block 9 and the blocking end 821 on the square sleeve 8 are against each other, and the door can be locked by lifting the handle at will after entering the door, and people can Don't worry about whether the button 3 is pressed or not at this time, because after pressing the button 3 and pressing down the handle 2 to open the door, after opening the door and releasing the handle 2, the button 3 will pop up automatically under the action of the spring 4, so The door lock has superior anti-theft performance, and can achieve anti-locking effect at any time.
[0047] Furthermore, it also includes a pressing plate 91;
[0048] The limiting plate 82 is arranged at the non-end of one end of the cylinder 81;
[0049] The middle part of the pressing plate 91 is set as a circular through hole 91, and the diameter of the circular through hole 91 is larger than the diameter of the cylindrical tube 81; On one end, both ends of the pressure plate 91 are fixedly connected to the limit cover 6;
[0050] The pressure plate 91 does not press the square sleeve 8, and one end of the cylinder 81 can pass through the circular through hole 91, but the limiting plate 82 will be restricted by the pressure plate 91 , so that the axial movement of the square sleeve 8 can only be restricted.
[0051] Furthermore, the rotating shaft 62 of the limiting cover 6 is fixedly connected to the handle 2 through a cup head screw 92 .
[0052] The fixed connection between the limiting cover 6 and the handle 2 can be released by unscrewing the cup head screw 92. The method of releasing the fixing is simple and fast, which is beneficial to realize quick installation and quick replacement of parts.
[0053] Furthermore, a bushing 93 is also included;
[0054] The bushing 93 is sleeved on the rotating shaft 62 and disposed in the installation cavity 11 respectively.
[0055] The bushing 93 can prevent the rotating shaft 62 of the limit cover 6 and the button 3 from directly rubbing against the installation cavity 11, reducing the damage to the rotating shaft 62 and the button 3, and protecting the shaft so that the shaft is inside the bushing 93 For reciprocating rotation.
[0056] Furthermore, the back of the locking surface 1 is also provided with a second fixing hole 13 , the second fixing hole 13 is located on the outside of the installation body and is 180° opposite to the first fixing hole 12 .
[0057] Both the first fixing hole 12 and the second fixing hole 13 are used to fix the position of the limit screw 7 . When the handle 2 is reversing left and right, the limit screw 7 needs to be unscrewed from the first fixing hole 12, and the handle 2 is rotated at an angle of 180° to the other side. The action rib 63 of the limit cover 6 drives the torsion spring 5 to rotate, and the torsion spring The two pins of 5 clamp the follow-up rib 822 of the square sleeve 8 to drive the rotation of the square sleeve 8. After the rotation position, the stop screw 7 is installed in the second fixing hole 13, and the torsion spring 5 The two pins are still stuck on the limit screw 7. Then the limit block 9 is removed from the cover surface 61, and then the limit block 9 is installed on the other side of the blocking end 821 of the limit plate 82. The entire handle 2 has been reversing and can realize fast reversing. It is convenient for the installation of door locks in different directions.
[0058] Furthermore, the handle 2 includes a handle 23 and a handle cover 24, the button cavity 21 and the rotating shaft cavity 22 are arranged at one end of the handle 23, and the handle 23 and the handle cover 24 are connected to each other. Fixed connection.
[0059] The handle 2 is divided into two parts, and the button 3 and the spring 4 can be easily taken out by removing the handle cover 24, and the button 3 can also be conveniently placed in the button cavity 21 during installation, and aligned with the card of the limit cover 6. Slot 64.
[0060] Furthermore, two limiting protrusions are provided on the edge of the cover surface 61 , including an upper protrusion 66 and a lower protrusion 67 .
[0061] The upper protrusion 66 and the lower protrusion 67 are used to limit the swing angle of the handle 2, which is convenient for unlocking and locking, and also limits the tension angle of the two pins of the torsion spring 5 to avoid excessive tension of the torsion spring 5 , handle 2 swings fast when resetting.
[0062] Furthermore, the upper protrusion 66 and the lower protrusion 67 are arranged on the outer edge of the semicircle on the same side of the cover surface 61, that is, the angle between the upper protrusion 66 and the lower protrusion 67 is less than 180° .
[0063] The swing range of the handle 2 for unlocking and closing is small, which is convenient for unlocking and closing.
[0064] The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. limits.

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