CN110748237B - Door lock handle prevents cat eye opening mechanism and has its lock - Google Patents

Abstract

The invention discloses a door lock handle anti-cat's eye opening mechanism and a door lock with the same. The mechanism includes a handle assembly, a square rod assembly and a cat's eye clutch assembly. The handle assembly includes a handle casing, and the square rod assembly is inserted in the handle casing. , the cat's eye clutch assembly includes a cat's eye clutch piece and a cat's eye clutch pressing piece, the cat's eye clutch pressing piece has a pressing shell and a pressing protrusion; the pressing protrusion moves toward the handle shell, and the pressing shell drives the cat's eye clutch piece to engage with the square bar assembly; or , the pressing protrusion protrudes out of the handle housing from the handle housing, the pressing housing of the cat's eye clutch pressing piece releases the cat's eye clutch piece, and the cat's eye clutch piece is disengaged from the square rod assembly. In the present invention, by adding a cat's eye clutch assembly, the user can switch the anti-cat's eye function on and off at will. In this way, when the door needs to be opened, the handle assembly must be pressed down and the protrusion can be pressed down to unlock the door. Therefore, the difficulty of opening the door is increased, which effectively avoids the need for The indoor handle is pulled through the cat's eye hole outdoors, which improves the safety of the anti-theft door.

Description

A door lock handle anti-cat eye opening mechanism and a door lock with the same

technical field

The invention relates to the technical field of intelligent security products, in particular to a door lock handle anti-cat's eye opening mechanism and a door lock having the same.

Background technique

Anti-theft doors on the market have cat eyes, which are convenient for observing the outdoor situation. Once the criminals destroy the cat eyes, they can hook the inner handle of the door through tools such as iron wires through the cat eye holes. At this time, the door can be quickly opened, resulting in the loss of personal and property safety of the user.

On the other hand, the existing anti-cat-eye opening mechanisms on the market are basically on the front of the handle. When an indoor user opens the door, he must first press the raised cylindrical button on the handle with his thumb, and then press the handle for two actions to open the door. , the added additional action not only reduces the speed and convenience of opening the door, but also destroys the overall aesthetics of the handle.

Therefore, a technical solution is desired to overcome or at least alleviate at least one of the above-mentioned deficiencies of the prior art.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a door lock handle anti-cat-eye opening mechanism to overcome or at least alleviate at least one of the above-mentioned defects of the prior art.

In order to achieve the above purpose, the present invention provides a door lock handle anti-cat's eye opening mechanism, the door lock handle anti-cat's eye opening mechanism includes a handle assembly, a square bar assembly and a cat's eye clutch assembly, wherein: the handle assembly includes a hollow handle shell At least part of the square rod assembly is inserted into the cavity of the handle housing, the cat's eye clutch assembly includes a cat's eye clutch plate and a cat's eye clutch pressing piece, the cat's eye clutch plate is driven by the cat's eye clutch A pressing piece, the cat-eye clutch pressing piece has a pressing shell and a pressing protrusion provided on the outside of the pressing shell, the pressing shell is accommodated in the cavity of the handle shell; the pressing protrusion Moving toward the cavity of the handle housing, the pressing housing drives the cat's eye clutch to engage with the square bar assembly, so that the handle assembly and the square bar assembly are connected into one body; or, the pressing protrusion Since it protrudes from the cavity of the handle housing and protrudes out of the cavity of the handle housing, the pressing housing of the cat's eye clutch presser releases the cat's eye clutch, and the cat's eye clutch is released from the side. The rod assembly is disengaged and the two are independent of each other.

Further, the handle housing includes a rear handle and a rear handle cover, the rear handle cover is fastened on the inside of the rear handle to form the cavity, and the rear handle cover is provided with a hole for the pressing protrusion to pass through. a first through hole out of the cavity.

Further, the cat's eye clutch assembly also includes a cat's eye clutch push plate, the cat's eye clutch push plate is placed between the rear handle and the cat's eye clutch pressing piece, and the cat's eye clutch push plate is close to the square bar assembly. One end is provided with an inclined surface protrusion; the pressing protrusion is provided on one end of the pressing housing close to the square bar assembly, and a rolling component is provided on the side of the pressing housing that is different from the pressing protrusion, and the The rolling assembly is in rolling fit with the arc-shaped concave surface of the bevel protrusion, so that the pressing protrusion protrudes out of the rear handle cover from the first through hole, or retracts from the outside to the handle housing In the cavity, it is flush with the rear handle cover; the end of the pressing housing away from the square rod assembly is hinged to the rear handle.

Further, one end of the rear handle away from the square bar assembly is provided with a rolling groove structure, and one end of the pressing housing away from the square bar assembly is provided with a cat's eye clutch pressing member shaft, and the cat's eye clutch pressing member shaft is hinged to the In the rolling groove structure, the cat's eye clutch pressing member can be rotated around the rear handle through the axis of the cat's eye clutch pressing member.

Further, the rolling assembly includes a bearing rivet and a rolling bearing, the rolling bearing is riveted into one body with the cat's eye clutch pressing piece through the bearing rivet, and the rolling bearing is in rolling fit with the convex arc concave surface of the inclined surface.

Further, the cat's eye clutch plate is U-shaped and has a first protrusion and a second protrusion. It is engaged with or disengaged from the square bar assembly with the movement of the cat's eye clutch push plate.

Further, the square rod assembly includes a square rod and a cat's eye shaft, wherein: the cat's eye shaft is cylindrical, one end is provided with a square blind hole for the square rod to be inserted into, and the other end is provided with a rotatable connection with the rear handle. The circular blind hole is formed; part of the side wall is removed from the outside of the circular blind hole in the circumferential direction to form a semi-annular gap, the protrusion of the rear handle abuts a plane of the semi-annular gap, and the cat's eye clutch The second protrusion of the sheet may engage another flat surface of the semi-annular indentation.

Further, the cat's eye clutch assembly also includes a cat's eye limit switch, the cat's eye limit switch is T-shaped, and the lateral sliding part can be slidably connected to the elongated through hole of the rear handle cover in a vertical direction. Extending through the elongated through hole of the cat's eye clutch pressing piece toward the connecting rod, the vertical connecting rod is connected with a cat's eye clutch paddle, and moving the lateral sliding part in the horizontal direction can make the cat's eye clutch paddle press Tightly until the pressing protrusion is pressed down on the cat's eye clutch pressing piece that is flush with the rear handle cover or separated from the cat's eye clutch pressing piece.

Further, the cat's eye clutch assembly also includes a cat's eye clutch push plate compression spring, and the cat's eye clutch push plate compression spring is arranged between the cat's eye clutch compression member and the handle housing, and extends for the pressing protrusion. Provide elastic force to the outside of the pressing housing.

The present invention also provides a door lock, characterized in that the door lock includes the above-mentioned door lock handle anti-cat-eye opening mechanism.

In the present invention, by adding a cat's eye clutch assembly, the user can switch the anti-cat's eye function on and off at will. In this way, when the door needs to be opened, the handle assembly must be pressed down while pressing the protrusion 6.5 to unlock the door, thus increasing the difficulty of opening the door, effectively The indoor handle is prevented from being pulled through the cat's eye hole outdoors, and the security of the security door is improved.

Description of drawings

Fig. 1 is the first state schematic diagram of the door lock handle anti-cat's eye opening mechanism provided by the present invention;

Fig. 2 is the second state schematic diagram of the door lock handle anti-cat's eye opening mechanism provided by the present invention;

Fig. 3 is the structural exploded view of the door lock handle anti-cat's eye opening mechanism shown in Fig. 1 and Fig. 2;

Fig. 4 is another perspective structural schematic diagram of the door lock handle anti-cat's eye opening mechanism shown in Fig. 3;

5 to 7 are schematic structural diagrams of the cat-eye clutch pressing member in the door lock handle anti-cat-eye opening mechanism shown in FIG. 3;

Fig. 8 is the structural representation of the cat's eye clutch push plate in the door lock handle anti-cat's eye opening mechanism shown in Fig. 3;

Fig. 9 is the structural representation of the rear handle in the door lock handle anti-cat's eye opening mechanism shown in Fig. 3;

Fig. 10 is the assembly schematic diagram of the rear handle and the cat's eye clutch push plate in the door lock handle anti-cat's eye opening mechanism shown in Fig. 3;

Fig. 11 is the structural representation of the cat's eye clutch in the door lock handle anti-cat's eye opening mechanism shown in Fig. 3;

Fig. 12 is the structural representation of the cat's eye shaft in the door lock handle anti-cat's eye opening mechanism shown in Fig. 3;

Figure 13 and Figure 14 are schematic structural diagrams of the rear handle cover in the door lock handle anti-cat's eye opening mechanism shown in Figure 3;

Figure 15 is a schematic diagram of the mating state of the cat's eye shaft assembly and the handle assembly in the door lock handle anti-cat's eye opening mechanism shown in Figure 3;

Figure 16 is a schematic diagram of the unlocked state of the cat's eye limit toggle in the door lock handle anti-cat's eye opening mechanism shown in Figure 3;

FIG. 17 is a schematic diagram of the locked state of the cat-eye limit switch in the anti-cat-eye opening mechanism of the door lock handle shown in FIG. 3 .

Detailed ways

In the drawings, the same or similar reference numerals are used to denote the same or similar elements or elements having the same or similar functions. The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In the description of the present invention, the terms "center", "portrait", "horizontal", "front", "rear", "left", "right", "vertical", "horizontal", "top", " The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated device or element. It must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of the present invention.

As shown in Figure 1, Figure 2 and Figure 5 to Figure 7, the door lock handle anti-cat's eye opening mechanism provided by this embodiment includes a handle assembly, a square bar assembly and a cat's eye clutch assembly, wherein:

The handle assembly includes a handle housing with a cavity, at least part of the square rod assembly is inserted into the cavity of the handle housing, and the cat's eye clutch assembly includes a cat's eye clutch piece 1 and a cat's eye clutch pressing piece 6 . .

The cat's eye clutch piece 1 is driven by the cat's eye clutch pressing piece 6. The cat's eye clutch pressing piece 6 has a pressing shell 6.6 and a pressing protrusion 6.5 arranged on the outside of the pressing shell 6.6. The pressing shell 6.6 is accommodated in the cavity of the handle shell. Inside. Fig. 1 shows that the cat's eye clutch pressing member 6 is in a free state that is not pressed. When the pressing protrusion 6.5 is pressed, the pressing protrusion 6.5 moves toward the cavity of the handle housing, and the pressing housing 6.6 of the cat's eye clutch pressing member 6 is pressed. Drive the cat's eye clutch 1 to engage with the square bar assembly, so that the handle assembly and the square bar assembly are connected into one (as shown in Figure 2), and the door can be unlocked by pressing the handle 5 at this time. Release the pressing of the cat's eye clutch pressing piece 6, the pressing protrusion 6.5 protrudes out of the cavity of the handle housing from the cavity of the handle housing, and the pressing housing 6.6 of the cat's eye clutch pressing piece 6 is released The cat's eye clutch piece 1, the cat's eye clutch piece 1 is disengaged from the square rod assembly, and the two are independent of each other.

In this embodiment, by adding a cat's eye clutch assembly, the user can switch the anti-cat's eye function on and off at will. In this way, when the door needs to be opened, the handle assembly must be pressed down while pressing the protrusion 6.5 to unlock the door, thus increasing the difficulty of opening the door. It can effectively prevent the indoor handle from being pulled through the cat's eye hole outdoors, and improve the safety of the anti-theft door.

As shown in FIGS. 3 and 4 , in one embodiment, the handle housing includes a rear handle 5 and a rear handle cover 4 , and the rear handle cover 4 is fastened inside the rear handle 5 to form the cavity. The "inside" here is relative to the user. When the user normally uses the handle, the side close to the user is regarded as the outer side of this embodiment, and the side away from the user is regarded as the inner side of this embodiment. The rear handle cover 4 is provided with a first through hole 4.1 for the pressing protrusion 6.5 to pass out of the cavity. When the user holds the handle, the thumb is usually placed on the rear handle cover 4. In this embodiment, the pressing protrusion 6.5 is arranged on the back of the handle. Pressing is performed, therefore, this embodiment achieves an efficient and smooth user experience of "one-grip unlocking" on the premise of ensuring the integrity of the appearance.

As shown in Figures 8 and 10, in one embodiment, the cat's eye clutch assembly further includes a cat's eye clutch push plate 7, and the cat's eye clutch push plate 7 is accommodated in the cavity of the handle housing, and is placed at the rear Between the handle 5 and the cat's eye clutch pressing member 6, an inclined surface protrusion 7.2 is provided on the outer side of the cat's eye clutch push plate 7 near the end of the square bar assembly. As shown in Figures 5 to 7, the plate body of the pressing shell 6.6 is elongated, and the pressing shell 6.6 is formed by extending from the edge of the plate body to its inner side along the normal direction of the plate body, and the pressing protrusion 6.5 is set. At one end of the pressing shell 6.6 close to the square bar assembly, a rolling assembly is provided on the side of the pressing shell 6.6 that is different from the pressing protrusion 6.5. The pressing protrusion 6.5 protrudes out of the rear handle cover 4 from the first through hole 4.1 , or retracts from the outside into the cavity of the handle housing, and is flush with the rear handle cover 4 . The end of the pressing housing 6.6 away from the square bar assembly is hinged to the rear handle 5.

Through this embodiment, pressing the pressing protrusion 6.5 of the cat's eye clutch pressing member 6, the rolling component rolls on the inclined surface protrusion 7.2 of the cat's eye clutch push plate 7, and the cat's eye clutch push plate 7 moves along the rear handle 5 under the action of the inclined surface component force. Sliding in the groove drives the cat's eye clutch 1 to move together. When the cat's eye clutch pressing member 6 is pressed down to the bottom, the cat's eye clutch 1 is engaged with the square bar assembly, and the rear handle 5, the cat's eye shaft 3 and the square bar 10 are connected into one body (as shown in Fig. 2 ), press down The rear handle 5 can realize the indoor door unlocking.

5 and 9, in one embodiment, the inner side of the rear handle 5 is provided with a rolling groove structure 5.1 at one end away from the square bar assembly, and the end of the pressing housing 6.6 away from the square bar assembly is provided with a cat's eye clutch. The pressing piece shaft 12 and the cat's eye clutch pressing piece shaft 12 are hinged into the rolling groove structure 5.1, so that the cat's eye clutch pressing piece 6 can rotate around the rear handle 5 through the cat's eye clutch pressing piece shaft 12. The rolling groove structure 5.1 is equivalent to the lever fulcrum of the pressing shell 6.6, and the pressing protrusion 6.5 can be pressed with a small pressing force.

As shown in FIG. 5 , in one embodiment, the rolling assembly includes a bearing rivet 17 and a rolling bearing 18 , the rolling bearing 18 is riveted into a whole with the cat's eye clutch pressing piece 6 through the bearing rivet 17 , and the rolling bearing 18 is connected to the inclined plane protrusion 7.2 Curved concave rolling fit. The cat's eye clutch pressing member 6 is hingedly connected to the rear handle 5 at 5.1 through the cat's eye clutch pressing member shaft 12 , and the cat's eye clutch pressing member 6 can rotate around the cat's eye clutch pressing member shaft 12 .

Through this embodiment, pressing the pressing protrusion 6.5 of the cat's eye clutch pressing member 6, the rolling bearing 18 rolls on the inclined surface protrusion 7.2 of the cat's eye clutch push plate 7, and under the action of the inclined surface component force, the cat's eye clutch push plate 7 moves along the groove of the rear handle 5. Slide to drive the cat's eye clutch 1 to move together. When the cat's eye clutch pressing member 6 is pressed down to the bottom, the cat's eye clutch 1 is engaged with the square bar assembly, and the rear handle 5, the cat's eye shaft 3 and the square bar 10 are connected into one body (as shown in Fig. 2 ), press down The rear handle 5 can realize the indoor door unlocking.

As shown in FIG. 11 , in one embodiment, the cat-eye clutch plate 1 is U-shaped and has a first protrusion 1.1 and a second protrusion 1.2 , and the first protrusion 1.1 is matched with the groove 7.1 of the cat-eye clutch push plate 7 Fixed together, the second protrusion 1.2 is engaged with or disengaged from the square rod assembly with the movement of the cat's eye clutch push plate 7 .

As shown in Figure 8, in one embodiment, the cat's eye clutch push plate 7 is provided with an elongated through slot 7.3, and the inner side of the rear handle 5 is provided with a guide post 5.2, which passes through the elongated through slot 7.3, so that it can be Slide left and right along the guide column 5.2 of the rear handle 5.

As shown in Figure 1, Figure 12 and Figure 15, in one embodiment, the square rod assembly includes a square rod 10 and a cat's eye shaft 3, wherein: the cat's eye shaft 3 is cylindrical, and one end is provided with a square blind for the square rod 10 to be inserted into. The square rod 10 is inserted into the square blind hole of the cat's eye shaft 3, so that the square rod 10 is linked with the cat's eye shaft 3. The other end of the cat-eye shaft 3 is provided with the circular blind hole 3.2 which can be rotatably connected with the rear handle 5 . Part of the sidewalls are removed from the outside of the circular blind hole 3.2 in the circumferential direction to form a semi-annular gap 3.1. The semi-annular gap 3.1 has two planes in the axial direction, the protrusion 5.4 of the rear handle 5 abuts against one plane of the semi-annular gap 3.1, and the second protrusion 1.2 of the cat-eye clutch 1 can be engaged with the semi-annular gap 3.1. another plane. Lift the rear handle 5 (Z direction shown in FIG. 15 ), and the protrusion 5.4 of the rear handle 5 is inserted into the surface 3.1 of the cat’s eye shaft 3. At this time, the rear handle 5, the cat’s eye shaft 3 and the square bar 10 are connected into one body, so The handle 5 can be locked after being lifted at any time.

As shown in Figure 7, Figure 13, Figure 14, Figure 16 and Figure 17, in one embodiment, the cat's eye clutch assembly further includes a cat's eye limit switch 8, and the cat's eye limit switch 8 is T-shaped, The lateral sliding portion 8.1 is slidably connected to the laterally extending elongated through hole 4.2 of the rear handle cover 4, and the vertical connecting rod portion 8.2 extends through the laterally extending elongated through hole 6.7 of the cat-eye clutch pressing piece 6. . The vertical connecting rod portion 8.2 is connected with a cat's eye clutch paddle 2, and the plane where the cat's eye clutch paddle 2 is located is horizontal. The length of the cat’s eye clutch paddle 2 along the direction of the vertical connecting rod portion 8.2 to the lateral sliding portion 8.1 is smaller than that of the pressing protrusion 6.5 when the cat’s eye clutch pressing member 6 is pressed down to be flush with the rear handle cover 4 . From the direction of the vertical connecting rod part 8.2 to the length of the lateral sliding part 8.1, the lateral sliding part 8.1 can be moved in the lateral direction to press the cat's eye clutch paddle 2 until the pressing protrusion 6.5 is pressed down to the rear handle. When the cover 4 is flush with the cat's eye clutch pressing piece 6 or separate from the cat's eye clutch pressing piece 6 . "Lateral direction" is the lengthwise extending direction of the handle housing, that is, the X direction shown in the drawings. "Vertical" is the direction in which the pressing protrusion 6.5 is pressed or ejected, that is, the Y direction shown in the figure.

When the user wants to turn off the anti-cat's eye function under certain circumstances, he only needs to press down the cat's eye clutch pressing member 6 to the end and at the same time move the cat's eye limit switch 8 to the opposite direction of the unlocking mark (as shown in Figure 3). The end face of the cat's eye clutch paddle 2 (as shown in Figure 13) fixed to it is stuck into the plane 6.3 of the cat's eye clutch pressing member 6, and the cat's eye clutch pressing member 6 is restricted in the pressed state to turn off the anti-cat's eye function, at any time at this time. Press the handle down to unlock the door.

As shown in Fig. 10, in one embodiment, the cat's eye clutch assembly further comprises a cat's eye clutch push plate compression spring 11, and the cat's eye clutch push plate compression spring 11 is arranged between the cat's eye clutch pressing member 6 and the handle housing, Provide elastic force for the pressing protrusion 6.5 to protrude to the outside of the pressing housing 6.6. Release the pressing of the cat's eye clutch pressing member 6, and under the force of the cat's eye clutch push plate pressing spring 11, the cat's eye clutch pressing member 6 returns to a free state.

The reason why the above actions can be reliably guaranteed is the existence of the square bar reset member 19, which is always in a horizontal position under the bidirectional force of the handle torsion spring, ensuring that the handle is lifted up or down. After the pressure is released, it can return to the initial horizontal state, which ensures that the cat's eye clutch 1 can be stuck into the cat's eye shaft 3 every time it is lifted up or pressed down.

The present invention also provides a door lock, which includes the above-mentioned door lock handle anti-cat-eye opening mechanism.

Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them. Those of ordinary skill in the art should understand that: the technical solutions described in the foregoing embodiments can be modified, or some technical features thereof can be equivalently replaced; these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the various aspects of the present invention. The spirit and scope of the technical solutions of the embodiments.

Claims (8)

1. The utility model provides a door lock handle prevents cat eye opening mechanism which characterized in that, includes handle subassembly, square bar subassembly and cat eye clutch module, wherein: the handle assembly comprises a handle shell with a cavity, at least part of the square bar assembly is inserted into the cavity of the handle shell, the cat eye clutch assembly comprises a cat eye clutch plate (1) and a cat eye clutch pressing piece (6), the cat eye clutch plate (1) is driven by the cat eye clutch pressing piece (6), the cat eye clutch pressing piece (6) is provided with a pressing shell (6.6) and a pressing bulge (6.5) arranged on the outer side of the pressing shell (6.6), and the pressing shell (6.6) is accommodated in the cavity of the handle shell; the pressing bulge (6.5) moves towards the cavity of the handle shell, and the pressing shell (6.6) drives the cat eye clutch plate (1) to be jointed with the square rod assembly, so that the handle assembly and the square rod assembly are connected into a whole; or the pressing bulge (6.5) extends out of the cavity of the handle shell from the cavity of the handle shell, the pressing shell (6.6) of the cat eye clutch pressing piece (6) releases the cat eye clutch plate (1), the cat eye clutch plate (1) is separated from the square rod component, and the cat eye clutch plate and the square rod component are independent,

the handle shell comprises a rear handle (5) and a rear handle cover (4), the rear handle cover (4) is buckled on the inner side of the rear handle (5) to form the cavity, the rear handle cover (4) is provided with a first through hole (4.1) for the pressing bulge (6.5) to penetrate out of the cavity,

the cat eye clutch assembly further comprises a cat eye limiting shifting piece (8), the cat eye limiting shifting piece (8) is T-shaped, a transverse sliding portion (8.1) can be connected to a long through hole (4.2) of the rear handle cover (4) in a transverse sliding mode, a vertical connecting rod portion (8.2) extends through a long through hole (6.7) of the cat eye clutch pressing piece (6), the vertical connecting rod portion (8.2) is connected with a cat eye clutch shifting piece (2), and the cat eye clutch shifting piece (2) can be pressed onto the cat eye clutch pressing piece (6) when the transverse sliding portion (8.1) is shifted in the transverse direction to enable the cat eye clutch shifting piece (2) to be pressed down to be flush with the rear handle cover (4) or separated from the cat eye clutch pressing piece (6).

2. The door lock handle cat eye opening prevention mechanism according to claim 1, wherein the cat eye clutch assembly further comprises a cat eye clutch push plate (7), the cat eye clutch push plate (7) is arranged between the rear handle (5) and the cat eye clutch pressing piece (6), and one end of the cat eye clutch push plate (7) close to the square bar assembly is provided with a slope protrusion (7.2);

the pressing bulge (6.5) is arranged at one end, close to the square rod assembly, of the pressing shell (6.6), a rolling assembly is arranged on one side, opposite to the pressing bulge (6.5), of the pressing shell (6.6), and the rolling assembly is in rolling fit with the arc concave surface of the inclined plane bulge (7.2), so that the pressing bulge (6.5) extends out of the rear handle cover (4) from the first through hole (4.1), or is withdrawn into a cavity of the handle shell from the outside and is flush with the rear handle cover (4);

the end of the pressing shell (6.6) far away from the square rod component is hinged to the rear handle (5).

3. A door lock handle anti-peep hole opening mechanism according to claim 2, characterized in that the end of the rear handle (5) away from the square bar assembly is provided with a roll groove structure (5.1), the end of the pressing housing (6.6) away from the square bar assembly is provided with a peep hole clutch presser shaft (12), the peep hole clutch presser shaft (12) is hinged in the roll groove structure (5.1), so that the peep hole clutch presser (6) can rotate around the rear handle (5) through the peep hole clutch presser shaft (12).

4. The door lock handle cat eye opening prevention mechanism according to claim 2, characterized in that the rolling assembly comprises a bearing rivet (17) and a rolling bearing (18), the rolling bearing (18) is riveted with the cat eye clutch presser (6) into a whole through the bearing rivet (17), and the rolling bearing (18) is in rolling fit with the arc concave surface of the inclined plane protrusion (7.2).

5. The door lock handle cat eye opening prevention mechanism according to claim 2, wherein the cat eye clutch plate (1) is U-shaped and has a first protrusion (1.1) and a second protrusion (1.2), the first protrusion (1.1) is fixedly connected with the slot (7.1) of the cat eye clutch push plate (7), and the second protrusion (1.2) is engaged with or disengaged from the square bar assembly along with the movement of the cat eye clutch push plate (7).

6. The door lock handle anti-peep hole opening mechanism according to any of claims 1-5, characterized in that the square bar assembly comprises a square bar (10) and a peep hole shaft (3), wherein: the cat eye shaft (3) is columnar, one end of the cat eye shaft is provided with a square blind hole for the square rod (10) to insert, and the other end of the cat eye shaft is provided with a round blind hole (3.2) which can be rotatably connected with the rear handle (5); the periphery surrounds the outside of circular blind hole (3.2) and removes partial lateral wall, forms semi-annular breach (3.1), protruding (5.4) butt of back handle (5) are to a plane of semi-annular breach (3.1), second arch (1.2) of cat eye clutch plate (1) can be joined to another plane of semi-annular breach (3.1).

7. The door lock handle cat eye opening prevention mechanism according to claim 1, wherein the cat eye clutch assembly further comprises a cat eye clutch push plate compression spring (11), the cat eye clutch push plate compression spring (11) is arranged between the cat eye clutch pressing member (6) and the handle housing, and provides an elastic force for the pressing protrusion (6.5) to extend to the outside of the pressing housing (6.6).

8. A door lock characterized in that it comprises a door lock handle anti-peep hole opening mechanism as claimed in any one of claims 1-7.

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