CN220133739U - Door lock rear panel assembly capable of preventing peephole from opening door - Google Patents

Abstract

The utility model discloses a door lock rear panel assembly capable of preventing a cat eye from opening a door, which comprises a rear panel, wherein a rear handle, a square pin, a clutch mechanism and a cat eye unlocking mechanism are arranged on the rear panel, the clutch mechanism is respectively connected with the square pin and the rear handle, the clutch mechanism comprises a first clutch piece and a second clutch piece, the first clutch piece and the second clutch piece can be movably clamped, the cat eye unlocking mechanism comprises a pushing block and a shifting block, one end of the shifting block extends out of the rear panel and is in sliding clamping connection with the rear panel, the other end of the shifting block extends into the rear panel and is connected with the pushing block, and the shifting block can drive the pushing block to slide on the rear panel so as to push the first clutch piece to be in limiting clamping connection or movable connection with the second clutch piece. According to the utility model, the anti-cat eye unlocking mechanism is arranged on the rear panel, so that the anti-cat eye unlocking function can be realized, the potential safety hazard is eliminated, and the safety of the door lock is improved.

Description

Door lock rear panel assembly capable of preventing peephole from opening door

Technical Field

The utility model relates to the technical field of intelligent door locks, in particular to a door lock rear panel assembly capable of preventing a peephole from opening a door.

Background

The smart door lock industry is developing rapidly, but problems are increasing over time. At present, most intelligent door locks on the market adopt double-quick double-movable lock bodies (double-movable means that handles inside and outside the door can be pressed downwards to realize door opening, double-quick means that handles outside the door can be lifted upwards to realize quick door locking, handles inside the door can also be lifted upwards to realize quick door locking, and the double-quick handles can be pressed downwards to realize quick door opening, but the double-quick handles are used together with the double-quick lock bodies to realize quick locking and quick unlocking). The lock body is characterized by quick opening and quick closing, and can be used for locking a door by lifting the handle and opening the door by pressing the handle downwards indoors and outdoors; but conveniently leaves a safety hazard. Specifically, most of the existing burglary-resisting doors are provided with peepholes, indoor personnel can conveniently observe the outdoor situation through the peepholes, and the peepholes are also security holes. After the peep hole is removed by a burglary, the peep hole stretches into the inner side of the burglary-resisting door by utilizing the iron rod with the hook, and the burglary-resisting door is opened by utilizing the hook to hook and rotate the handle on the inner side of the burglary-resisting door.

Therefore, the existing intelligent door lock has a certain potential safety hazard, and technical improvement on the existing intelligent door lock is necessary.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides a door lock rear panel assembly for preventing a cat eye from opening a door, which comprises a rear panel, wherein a rear handle and a square pin are arranged on the rear panel, the square pin is used for being connected with a lock body of the door lock, a clutch mechanism is arranged on the rear panel and is respectively connected with the square pin and the rear handle, the clutch mechanism comprises a first clutch piece and a second clutch piece, the first clutch piece is connected with the rear handle, the second clutch piece is connected with the square pin, and the first clutch piece is movably clamped with the second clutch piece; be equipped with on the rear panel and prevent cat eye unlocking mechanism, prevent cat eye unlocking mechanism includes impeller block and shifting block, the impeller block with rear panel sliding connection, just the impeller block can with first separation and reunion spare meets, the one end of shifting block stretch out the rear panel, and with rear panel slip joint, the other end of shifting block stretch into behind the rear panel with the impeller block is connected, the shifting block can drive the impeller block slides on the rear panel, and then promotes first separation and reunion spare and the spacing joint of second separation and reunion spare or swing joint.

As a further improvement of the utility model, a blind hole is arranged in the first clutch piece, one end of the second clutch piece is inserted into the blind hole for movable connection, a plug-in mechanism is arranged on the first clutch piece, the pushing block is connected with the plug-in mechanism, and the pushing block can drive the plug-in mechanism to be clamped with the second clutch piece.

As a further improvement of the utility model, a first radial hole is arranged on the side wall of the blind hole, a second radial hole is arranged on the side wall of one end of the second clutch member, which is inserted into the blind hole, the plug-in mechanism comprises a plug pin which is arranged in the first radial hole, the plug pin is slidably connected with the first radial hole, one end of the plug pin extends out of the first clutch member and can be connected with the pushing block, and the pushing block can drive the plug pin to slide in the first radial hole so as to push the plug pin to extend into the blind hole and be inserted into the second radial hole.

As a further improvement of the utility model, a limiting boss is arranged in the middle of the bolt, an elastic piece is sleeved on the bolt, two ends of the elastic piece are respectively connected with the first clutch piece and the limiting boss, a limiting piece is arranged on the first clutch piece and used for limiting the bolt in the first radial hole, and one side of the limiting boss, which is far away from the elastic piece, can be abutted with the limiting piece.

As a further improvement of the utility model, an abutting surface is arranged at one end of the pushing block, which is close to the first clutch piece, and the abutting surface can be abutted with a bolt and push the bolt into the first radial hole; the pushing block is provided with an inclined slot hole, one end of the pushing block, which stretches into the rear panel, is provided with a poking rod, the poking rod penetrates through the inclined slot hole and is in sliding connection with the inclined slot hole, and the poking block can drive the poking rod to slide in the inclined slot hole so as to push the pushing block to move up and down.

As a further improvement of the utility model, the toggle rod is sleeved with a bearing, the bearing is arranged at the corresponding position of the toggle rod and the chute hole, and the outer side wall of the bearing is connected with the inner side wall of the chute hole.

As a further improvement of the utility model, the rear panel is provided with the elastic snap spring, two ends of the elastic snap spring are respectively connected with the rear panel, the position, corresponding to the chute hole, of the elastic snap spring is provided with the convex angle, and the toggle rod can be respectively abutted with two sides of the convex angle.

As a further improvement of the utility model, a fixed block is arranged in the rear panel, a reset torsion spring is sleeved on the rear handle, and two ends of the reset torsion spring are respectively connected with the fixed block and the rear handle.

As a further improvement of the utility model, the back panel is provided with a back locking knob, the back locking knob is provided with a back locking pin, and the back locking pin can be connected with a lock body of the door lock.

As a further improvement of the utility model, a protection plate is arranged on one side of the rear panel away from the rear handle, and a silica gel pad is arranged on one side of the protection plate away from the rear panel.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, the anti-cat eye unlocking mechanism is arranged on the rear panel, so that the anti-cat eye unlocking function can be realized, the potential safety hazard is eliminated, and the safety of the door lock is improved. Specifically, under normal conditions, the pushing block is connected with the first clutch piece, so that the first clutch piece is in limiting clamping connection with the second clutch piece, the first clutch piece is driven to move by pressing down the rear handle, and the first clutch piece drives the second clutch piece and the square pin to move simultaneously, so that unlocking is realized; when the cat eye prevention door opening function is required to be opened, a user can stir the shifting block, the shifting block slides on the rear panel, and then the pushing block is driven to slide on the rear panel, so that the pushing block is separated from the first clutch piece, and the first clutch piece is movably connected with the second clutch piece; at this time, the rear handle is pressed down again, and the rear handle can drive the first clutch piece to move, and because the first clutch piece is movably connected with the second clutch piece, the second clutch piece cannot move along with the first clutch piece, so that unlocking cannot be realized, and the function of preventing the peep hole from unlocking is realized.

Drawings

In order to more clearly illustrate the utility model or the solutions of the prior art, a brief description will be given below of the drawings used in the description of the embodiments or the prior art, it being obvious that the drawings in the description below are some embodiments of the utility model and that other drawings can be obtained from them without the inventive effort of a person skilled in the art.

FIG. 1 is a schematic view of the overall structure of an embodiment of the present utility model;

FIG. 2 is an exploded view of an embodiment of the present utility model;

FIG. 3 is an exploded view of a clutch mechanism according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of an exploded view of a cat eye prevention unlocking mechanism in an embodiment of the present utility model;

FIG. 5 is a schematic cross-sectional elevation view of a first clutch according to an embodiment of the present utility model;

FIG. 6 is a schematic front view of a rear panel in accordance with an embodiment of the present utility model;

FIG. 7 is a schematic diagram of the clutch mechanism and the anti-cat eye unlocking mechanism according to the embodiment of the present utility model;

fig. 8 is a schematic structural view of an elastic snap spring in an embodiment of the utility model.

Detailed Description

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs; the terminology used in the description of the applications herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description of the utility model and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In order to make the person skilled in the art better understand the solution of the present utility model, the technical solution of the embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

As shown in fig. 1, a door lock back panel assembly for preventing a cat eye from opening a door comprises a back panel 1, wherein a back handle 3 and a square pin 4 are arranged on the back panel 1, and the square pin 4 is used for being connected with a lock body of the door lock; when unlocking, the lock body is driven to unlock by rotating the rear handle 3 and then driving the square pin 4 to rotate. The back panel 1 is provided with a back locking knob 5, the back locking knob 5 is inserted with a back locking pin 6, and the back locking pin 6 is inserted into the lock body when the door lock is installed; when a user needs to be locked in a house, the user only needs to rotate the locking knob 5 to drive the locking pin 6 to rotate, and the locking pin 6 can drive the lock body to work to realize locking.

As shown in fig. 2 and 3, the rear panel 1 is provided with a clutch mechanism which is respectively connected with the square pin 4 and the rear handle 3, and the clutch mechanism is used for controlling the connection or disconnection of the square pin 4 and the rear handle 3. The clutch mechanism comprises a first clutch piece 21 and a second clutch piece 22, the first clutch piece 21 is connected with the rear handle 3, the second clutch piece 22 is in limit insertion connection with the square pin 4, and the first clutch piece 21 and the second clutch piece 22 can be movably clamped.

The back panel 1 is provided with a cat eye prevention unlocking mechanism, and the cat eye prevention unlocking mechanism only needs to be capable of controlling the first clutch member 21 to be clamped with the second clutch member 22 or movably connected with the first clutch member. When the first clutch piece 21 is clamped with the second clutch piece 22, the handle 3 can drive the first clutch piece 21 to rotate after rotation, and the first clutch piece 21 can drive the second clutch piece 22 to rotate together with the square pin 4, so that the lock body is driven to work, and the normal unlocking function is realized; when the first clutch piece 21 is movably connected with the second clutch piece 22, the handle 3 can only drive the first clutch piece 21 to rotate after rotation, but can not drive the second clutch piece 22 and the square pin 4 to rotate, so that unlocking can not be realized, and the function of preventing the peephole from unlocking is realized at the moment.

As shown in fig. 2 and 4, specifically, the cat eye prevention unlocking mechanism comprises a pushing block 23 and a shifting block 24, wherein the pushing block 23 is installed on the rear panel 1 and is in sliding connection with the rear panel 1, the shifting block 24 is installed on the pushing block 23, one end of the shifting block 24 extends out of the rear panel 1 and is in sliding clamping connection with the rear panel 1, and the other end of the shifting block 24 extends into the rear panel 1 and is in sliding connection with the pushing block 23. When in use, a user can drive the pushing block 23 to slide on the rear panel 1 by poking the poking block 24, so that the pushing block 23 is abutted or separated from the first clutch piece 21. When the pushing block 23 is abutted with the first clutch piece 21, the pushing block 23 can push the first clutch piece 21 to be in limiting clamping connection with the second clutch piece 22; when the pushing block 23 is separated from the first clutch member 21, the first clutch member 21 is movably connected with the second clutch member 22.

Normally, the pushing block 23 is in an abutting state with the first clutch piece 21, at this time, the first clutch piece 21 and the second clutch piece 22 are in a limiting and clamping state, and the second clutch piece 22 and the square pin 4 can be driven to rotate by rotating the rear handle 3, so that unlocking is realized. When the cat eye unlocking prevention function is required to be opened, a user can toggle the shifting block 24, the shifting block 24 slides on the pushing block 23 and pushes the pushing block 23 to slide on the rear panel 1, so that the pushing block 23 is separated from the first clutch piece 21; at this time, the first clutch member 21 is separated from the second clutch member 22, so that the rear handle 3 cannot drive the second clutch member 22 and the square pin 4 to rotate, thereby realizing the function of preventing the cat eye from unlocking. This prevent intelligent lock that cat eye unblanked is through setting up on rear panel 1 and preventing cat eye unlocking mechanism, makes it can realize preventing the function that cat eye unblanked, has eliminated the potential safety hazard, has promoted the security of lock.

As shown in fig. 5, one end of the first clutch member 21 is fixedly connected with the rear handle 3, a blind hole 211 is formed in the end face of the other end, one end of the second clutch member 22 is inserted into the blind hole 211, the second clutch member 22 can freely rotate in the blind hole 211, a plug-in mechanism is arranged on the first clutch member 21, the push block 23 is connected with the plug-in mechanism, the push block 23 can drive the plug-in mechanism to be clamped with the second clutch member 22, and therefore the first clutch member 21 and the second clutch member 22 are clamped and limited through the plug-in mechanism, and the unlocking function of the handle 3 after daily rotation is achieved. The side wall of the blind hole 211 is provided with first radial holes 212, in this embodiment, the number of the first radial holes 212 and the number of the plugging mechanisms are two respectively, and the two first radial holes 212 are symmetrically distributed along the central axis of the blind hole 211; through setting up two first radial holes 212 and two grafting mechanisms make this intelligent lock can satisfy the installation demand that opens the door to the left side and opens the door to the right side two kinds of room doors, and open the door to the left side and open the door to the right side and can both directly use, need not to disassemble the lock to promote the practicality.

As shown in fig. 3 and 5, a second radial hole 221 is formed in a side wall of one end of the second clutch member 22 inserted into the blind hole 211, the plugging mechanism comprises a plug 213 disposed in the first radial hole 212, the plug 213 is slidably connected with the first radial hole 212, one end of the plug 213 extends out of the first clutch member 21 and is connected with the pushing block 23, and the pushing block 23 can drive the plug 213 to slide in the first radial hole 212, so that the plug 213 is pushed to extend into the blind hole 211 and is inserted into the second radial hole 221. The middle part of bolt 213 is provided with spacing boss 214, and the cover is equipped with elastic component 215 on the bolt 213, and elastic component 215's both ends are connected with first separation and reunion piece 21 and spacing boss 214 respectively, are equipped with spacing piece 216 on the first separation and reunion piece 21, and spacing piece 216 fixed mounting is in first radial downthehole 212, and spacing piece 216 is used for spacing bolt 213 in first radial downthehole 212, and spacing boss 214 is kept away from one side of elastic component 215 can with spacing piece 216 butt.

Normally, the pushing block 23 is connected to the plug 213, and the plug 213 is pushed into the blind hole 211 by the pushing block 23 and inserted into the second radial hole 221, so that the first clutch member 21 and the second clutch member 22 are clamped and limited; the user can rotate the rear handle 3 to drive the square pin 4 to rotate, so that unlocking is realized, and the peep hole unlocking prevention function is not started. It should be noted that, in the process that the plug 213 extends into the blind hole 211, the limiting boss 214 compresses the elastic member 215 to elastically deform. When the cat eye unlocking prevention function is required to be opened, a user can dial the dial block 24, and the dial block 24 drives the pushing block 23 to slide on the rear panel 1, so that the pushing block 23 is separated from the bolt 213; after the pushing block 23 is separated from the plug 213, the plug 213 is driven to slide in the first radial hole 212 under the elastic force of the elastic member 215 until the limiting boss 214 abuts against the limiting member 216; the elastic member 215 extends out of the second radial hole 221 during resetting of the driving pin 213, so that the first clutch member 21 is separated from the second clutch member 22; at this time, the handle 3 can not drive the second clutch member 22 and the square pin 4 to rotate after rotating, so that the function of preventing the peephole from unlocking is realized. When the cat eye unlocking prevention function is required to be closed, a user can dial the dial block 24 reversely, the dial block 24 drives the pushing block 23 to slide on the rear panel 1, the pushing block 23 is driven to be connected with the bolt 213, and the bolt 213 is pushed to slide in the first radial hole 212. In the sliding process of the latch 213, the limiting boss 214 compresses the elastic member 215, so that the elastic member 215 is elastically deformed; meanwhile, the bolt 213 can extend into the blind hole 211 in the sliding process and is inserted into the second radial hole 221, so that the first clutch piece 21 and the second clutch piece 22 are clamped and limited, and a user can rotate the square pin 4 through the handle 3 after rotating, thereby unlocking.

In this embodiment, the elastic member 215 is a coil spring, and in other embodiments, the elastic member 215 may be a spring plate or the like.

As shown in fig. 4, in order to make the pushing block 23 stably push the latch 213 into the first radial hole 212, one end of the pushing block 23, which is close to the first clutch member 21, is provided with an arc-shaped abutment surface 231, and the shape of the abutment surface 231 is adapted to the shape of the outer sidewall of the first clutch member 21, when the pushing block 24 is pushed to drive the pushing block 23 to move, the abutment surface 231 is firstly abutted against the latch 213, so as to push the latch 213 to extend into the first radial hole 212. The abutting surface 231 is arranged in an arc shape, so that the latch 213 can be prevented from being shifted in the abutting process, the transmission precision is affected, and meanwhile, interference caused by the pushing block 23 to the rotation of the first clutch piece 21 can be avoided.

In one embodiment, as shown in fig. 4 and 6, the pushing block 23 is provided with a chute hole 232, the chute hole 232 is in an inclined structure, one end of the shifting block 24 extending into the rear panel 1 is provided with a shifting rod 241, and the shifting rod 241 passes through the chute hole 232 and is in sliding connection with the chute hole 232; one end of the shifting block 24 extending out of the rear panel 1 is provided with a shifting lever 242, the rear panel 1 is provided with a transverse chute 25, and the shifting lever 242 penetrates through the transverse chute 25 and is in sliding limit connection with the transverse chute 25; when the cat eye unlocking prevention function is required to be closed or opened, a user slides in the transverse chute 25 by poking the poking rod 242; the deflector rod 242 is limited by the transverse chute 25 and can only move transversely, so that the deflector rod 242 drives the deflector block 24 and the deflector rod 241 to move transversely, the deflector rod 241 slides in the chute hole 232, and the chute hole 232 is arranged in an inclined mode, so that the deflector rod 241 can push the push block 23 to move up and down on the rear panel 1, and the abutting surface 231 on the push block 23 moves towards a direction approaching or far away from the plug pin 213.

In order to make the movement of the toggle rod 241 in the chute hole 232 smoother, a bearing 243 is sleeved on the toggle rod 241, the bearing 243 is arranged at the corresponding position of the toggle rod 241 and the chute hole 232, the outer diameter of the bearing 243 is matched with the width of the chute hole 232, and the outer side wall of the bearing 243 is connected with the inner side wall of the chute hole 232. After the user dials the toggle lever 242, the toggle lever 241 can be driven to move transversely, so that the bearing 243 rotates and rolls in the chute hole 232; friction can be reduced by providing the bearing 243, thereby improving the stability of the movement of the tap lever 241.

One end of the toggle rod 241 penetrating through the inclined slot hole 232 is sleeved with a limiting gasket 244, and the diameter of the limiting gasket 244 is larger than the width of the inclined slot hole 232; the bearing 243 can be prevented from being shifted by arranging the limiting gasket 244, so that the stirring process can be ensured to be smoothly carried out, and the stability of the structure is improved.

A prompting label 245 is stuck on the surface of one side of the shifting block 24 close to the shifting lever 242, the prompting label 245 is arranged at a position corresponding to the transverse chute 25, and in the embodiment, the prompting label 245 is arranged at the left side of the shifting lever 242; when the user dials the deflector rod 242 to move to the right limit position on the transverse chute 25, the prompt tag 245 can be seen through the transverse chute 25, so that the cat eye unlocking prevention function is closed at the moment; when the user dials the thumb lever 242 to move to the left limit position on the lateral chute 25, the prompt tag 245 cannot be seen through the lateral chute 25, which indicates that the cat eye unlocking prevention function is already on. In other embodiments, the prompt tag 245 may also be disposed on the right side of the lever 242, so that the prompt tag 245 can be seen when the cat eye unlocking prevention function is turned on; or the prompt labels 245 are respectively arranged on the left side and the right side of the deflector rod 242, and the prompt labels 245 on the left side and the right side of the deflector rod 242 are only required to be ensured to be different in color or different in prompt characters.

As shown in fig. 2, 7 and 8, the back panel 1 is provided with an elastic snap spring 26, two ends of the elastic snap spring 26 are respectively and fixedly connected with the back panel 1, a convex angle 261 is arranged at a position, corresponding to the chute hole 232, on the elastic snap spring 26, and bearings 243 on the toggle rod 241 can be respectively abutted with two sides of the convex angle 261. Specifically, in the process that the user toggles the shift lever 242 to open or close the cat eye unlocking prevention function, the shift lever 241 moves along with the shift lever 242, a bearing 243 on the shift lever 241 presses a convex angle 261 on the elastic clamp spring 26 to enable the convex angle 261 to elastically deform, and when the shift lever 241 moves to the other side of the convex angle 261, the elastic clamp spring 26 automatically resets to enable the other side of the convex angle 261 to be abutted with the bearing 243; at this time, the pushing block 23 is just switched to the position where the cat eye preventing function is turned on or off. The elastic clamp spring 26 is arranged, so that the hand feeling of poking and poking can be improved, and a user can know whether the poking rod 241 moves in place or not; on the other hand, the two sides of the lobe 261 can be respectively abutted with the bearing 243, so that the positions of the bearing 243 and the poking rod 241 in the chute hole 232 can be limited, unnecessary displacement of the poking rod 241 is prevented, and the stability of the structure is improved.

As shown in fig. 2, a fixed block 7 is arranged in the rear panel 1, a reset torsion spring 8 is sleeved on the rear handle 3, and two ends of the reset torsion spring 8 are respectively connected with the fixed block 7 and the rear handle 3. When the user rotates the rear handle 3, the reset torsion spring 8 is elastically deformed; when the user releases the rear handle 3, the rear handle 3 can be driven to automatically reset under the elastic force of the reset torsion spring 8. The protection plate 9 is arranged on one side, far away from the rear handle 3, of the rear panel 1, the protection plate 9 is fixedly connected with the rear panel 1 through screws, a relatively sealed space is formed inside the protection plate 9, and the clutch mechanism and the cat eye preventing unlocking mechanism are respectively arranged in the relatively sealed space, so that the protection plate is not easily affected by the outside, and damage to an internal structure caused by the outside force can be reduced; one side of the protection plate 9, which is far away from the rear panel 1, is provided with a silica gel pad 10, and when the silica gel pad 10 is arranged, the friction between the door and the protection plate 9 can be reduced when the intelligent door lock is installed, and the door and the intelligent door lock are protected.

A battery box 11 is arranged in the rear panel 1, the battery box 11 is used for installing a battery, and the battery box 11 is electrically connected with a control main board of the door lock and is used for supplying power to the intelligent door lock; the battery case 11 is provided with a battery cover 12, and the battery cover 12 is detachably connected with the rear panel 1, thereby facilitating replacement of the battery.

It is apparent that the above-described embodiments are only some embodiments of the present utility model, but not all embodiments, and the preferred embodiments of the present utility model are shown in the drawings, which do not limit the scope of the patent claims. This utility model may be embodied in many different forms, but rather, embodiments are provided in order that the present disclosure may be more fully understood. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing description, or equivalents may be substituted for elements thereof. All equivalent structures made by the content of the specification and the drawings of the utility model are directly or indirectly applied to other related technical fields, and are also within the scope of the utility model.

Claims (10)

1. Prevent door lock rear panel subassembly that cat eye opened door, including the rear panel, be equipped with back handle and square pin on the rear panel, square pin is used for being connected its characterized in that with the lock body of lock: the rear panel is provided with a clutch mechanism which is respectively connected with the square pin and the rear handle, the clutch mechanism comprises a first clutch piece and a second clutch piece, the first clutch piece is connected with the rear handle, the second clutch piece is connected with the square pin, and the first clutch piece is movably clamped with the second clutch piece;

be equipped with on the rear panel and prevent cat eye unlocking mechanism, prevent cat eye unlocking mechanism includes impeller block and shifting block, the impeller block with rear panel sliding connection, just the impeller block can with first separation and reunion spare meets, the one end of shifting block stretch out the rear panel, and with rear panel slip joint, the other end of shifting block stretch into behind the rear panel with the impeller block is connected, the shifting block can drive the impeller block slides on the rear panel, and then promotes first separation and reunion spare and the spacing joint of second separation and reunion spare or swing joint.

2. The door lock rear panel assembly for preventing a cat eye from opening a door according to claim 1, wherein: the clutch comprises a first clutch piece, a second clutch piece, a pushing block and a second clutch piece, wherein a blind hole is formed in the first clutch piece, one end of the second clutch piece is inserted into the blind hole and is movably connected with the blind hole, a plug-in mechanism is arranged on the first clutch piece, the pushing block is connected with the plug-in mechanism, and the pushing block can drive the plug-in mechanism to be clamped with the second clutch piece.

3. The door lock rear panel assembly for preventing a cat eye from opening a door according to claim 2, wherein: be equipped with first radial hole on the lateral wall of blind hole, the second separation and reunion piece inserts be equipped with the radial hole of second on the one end lateral wall of blind hole, grafting mechanism is including setting up the bolt in the radial hole of first, the bolt with but first radial hole sliding connection, the one end of bolt stretches out first separation and reunion piece and can with the impeller block meets, the impeller block can drive the bolt slides in first radial hole, and then promotes the bolt stretches into in the blind hole, and inserts in the radial hole of second.

4. The door lock rear panel assembly for preventing a cat eye from opening a door according to claim 3, wherein: the middle part of bolt is provided with spacing boss, the cover is equipped with the elastic component on the bolt, the both ends of elastic component respectively with first separation and reunion spare and spacing boss are connected, be equipped with the locating part on the first separation and reunion spare, the locating part be used for with the bolt is spacing in the first radial downthehole, spacing boss keep away from one side of elastic component can with the locating part butt.

5. The door lock rear panel assembly for preventing a cat eye from opening a door according to claim 3, wherein: an abutting surface is arranged at one end, close to the first clutch piece, of the pushing block, and can be abutted with a bolt and push the bolt into the first radial hole;

the pushing block is provided with an inclined slot hole, one end of the pushing block, which stretches into the rear panel, is provided with a poking rod, the poking rod penetrates through the inclined slot hole and is in sliding connection with the inclined slot hole, and the poking block can drive the poking rod to slide in the inclined slot hole so as to push the pushing block to move up and down.

6. The door lock rear panel assembly for preventing a cat eye door according to claim 5, wherein: the toggle rod is sleeved with a bearing, the bearing is arranged at the corresponding position of the toggle rod and the chute hole, and the outer side wall of the bearing is connected with the inner side wall of the chute hole.

7. The door lock rear panel assembly for preventing a cat eye door according to claim 5, wherein: the rear panel is provided with an elastic snap spring, two ends of the elastic snap spring are respectively connected with the rear panel, a convex angle is arranged at the corresponding position of the elastic snap spring and the chute hole, and the toggle rod can be respectively abutted to two sides of the convex angle.

8. The anti-cat eye door lock rear panel assembly according to any one of claims 1-7, wherein: the rear panel is internally provided with a fixed block, the rear handle is sleeved with a reset torsion spring, and two ends of the reset torsion spring are respectively connected with the fixed block and the rear handle.

9. The door lock rear panel assembly for preventing a cat eye door according to claim 8, wherein: the back panel is provided with a back locking knob, the back locking knob is provided with a back locking pin, and the back locking pin can be connected with a lock body of the door lock.

10. The door lock rear panel assembly for preventing a cat eye door according to claim 8, wherein: the rear panel is provided with a protection plate on one side far away from the rear handle, and a silica gel pad is arranged on one side far away from the rear panel.