Interior door handle lock

Abstract

The present invention provides an interior door handle lock, comprising an inner handle, a handle inner cover, a locking assembly, a positioning column, and a square rod. The inner handle comprises a first grip portion and a first transmission portion. The first transmission portion comprises a first mounting position at a free end, and the handle inner cover comprises a second mounting position. The positioning assembly is positioned in the first mounting position and, under the push of a locking assembly mounted within the first transmission portion, partially engages with the second mounting position, thereby locking the inner handle and the handle inner cover relative to each other. The locking assembly comprises a pressing member, a buckle box, and a push rod. The buckle box comprises a box body and a telescopic hook, and the buckle box is mounted in a first mounting slot of the pressing member. As the positioning column is pushed by the pressing member into the second mounting position, the buckle box, driven by the pressing member, moves toward the push rod until the push rod pushes the telescopic hook to retract into the box body and firmly embrace the push rod, thereby axially securing the positioning column and the pressing member. The present invention is not only simple to operate but also relatively inexpensive.

Description

Technical Field

[0001] The present invention relates to the field of door locks, and more particularly to an indoor door handle lock. Background Art

[0002] Door locks are security devices used to control the opening and closing of doors, and are widely used in various locations, including residences, commercial buildings, and public facilities. To prevent theft, door locks are typically locked from inside the house and cannot be opened from outside, requiring only a key or other intelligent identification method. These locks are often complex and expensive.

[0003] Locks installed on doors inside homes, offices, or other buildings are primarily used to provide privacy and security. They primarily address internal security concerns rather than defending against external intrusions. Using ordinary locks can result in relatively high costs. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an interior door handle lock to address the problem of high cost caused by using ordinary locks for the above-mentioned interior doors.

[0005] The technical solution of the present invention to solve the above technical problems is to provide an indoor door handle lock, including an inner handle, a handle inner cover, a locking assembly, a positioning column and a square rod;

[0006] The inner handle includes a first grip portion and a first transmission portion connected to one end of the first grip portion; the first transmission portion includes a first mounting position located at a free end, the handle inner cover includes a second mounting position, and the inner handle is rotatably connected to the handle inner cover in a manner such that the first mounting position and the second mounting position are coaxially connected, and the inner handle drives the square rod to rotate to achieve telescopic control of the lock tongue;

[0007] The positioning post is formed of a cylindrical body with a non-circular cross-section, and the cross-sections of the first mounting position and the second mounting position are respectively adapted to the cross-sections of the positioning post; the positioning post is mounted in the first mounting position of the first transmission part, and is partially embedded in the second mounting position of the handle inner cover under the push of a locking assembly installed in the first transmission part, so that the inner handle and the handle inner cover are relatively locked;

[0008] The locking assembly includes a pressing piece, a buckle box and a push rod, the end of the first end of the pressing piece has a first mounting groove, the buckle box is installed in the first mounting groove and includes a box body and a telescopic hook installed on the box body; the head end of the push rod passes through the positioning column and is slidably connected to the positioning column, and in the process of the positioning column being pushed by the pressing piece to slide into the second mounting position, the buckle box moves toward the push rod driven by the pressing piece until the push rod pushes the telescopic hook to retract into the box body and holds the push rod, thereby fixing the positioning column axially.

[0009] As a further improvement of the present invention, a first elastic member is provided between the positioning post and the handle inner cover for pushing the positioning post away from the second installation position, and when the positioning post is pushed by the pressing member to slide into the second installation position, the first elastic member is compressed;

[0010] When the positioning column is axially fixed, the box body of the buckle box is moved forward by pushing the pressing piece again, and the telescopic hook is pushed again by the push rod and pops out of the box body to release the push rod, and the first elastic piece pushes the positioning column to leave the second installation position through its own elastic force, so that the inner handle and the handle inner cover are unlocked.

[0011] As a further improvement of the present invention, the first transmission part is vertically connected to one end of the first handle part, and the first transmission part includes a first through hole, which extends from the bottom of the first mounting position to the outside of the first transmission part, and the pressing piece and the buckle box are assembled in the first through hole and the first mounting position, and abut against the positioning column in the first mounting position, and the tail end of the pressing piece is exposed from the tail end of the first through hole.

[0012] As a further improvement of the present invention, the positioning column includes a first central through hole arranged along the axial direction, and when the pressing member and the buckle box are assembled in the first through hole and the positioning column is installed in the first mounting position, the front end of the buckle box is embedded in the first central through hole.

[0013] As a further improvement of the present invention, the positioning column includes a cylindrical body and several convex strips protruding from the outer circumference of the cylindrical body and arranged along the axial direction of the cylindrical body, the first mounting position includes a first positioning groove corresponding to the convex strip, the second mounting position includes a second positioning groove corresponding to the convex strip, and when the positioning column is installed in the first mounting position, the convex strip is embedded in the first positioning groove, and when the positioning column is pushed into the second mounting position, at least a portion of the convex strip is embedded in the second positioning groove, and the remaining portion is embedded in the first positioning groove.

[0014] As a further improvement of the present invention, the square rod includes a second central through hole arranged axially, and the interior door handle lock also includes a push rod screw and a push rod spring. The push rod screw is inserted into the second central through hole of the square rod from the head end of the square rod, and is threadedly connected to the push rod located at the tail end of the square rod. The two ends of the push rod spring are respectively abutted against the screw head of the push rod screw and the head end of the square rod, and when the push rod is tightly clamped by the telescopic hook, the telescopic hook pops out of the box body and opens under the push of the push rod screw, and the first elastic member pushes the positioning column to leave the second installation position through its own elastic force, so that the inner handle and the handle inner cover are unlocked.

[0015] As a further improvement of the present invention, the interior door handle lock further comprises an outer handle and a handle outer cover, and the outer handle is rotatably connected to the handle outer cover; the square rod passes through the handle outer cover and is transmission-connected to the outer handle;

[0016] The external handle includes a second grip portion and a second transmission portion connected to one end portion of the second grip portion, the second transmission portion has a second mounting groove, and the opening of the second mounting groove is located on the end face of the free end of the second transmission portion, the screw head of the push rod screw is inserted into the second mounting groove; the second transmission portion includes a second through hole for inserting an emergency device into the second mounting groove and pushing the push rod screw to move axially relative to the square rod.

[0017] As a further improvement of the present invention, the push rod includes a tail end and a connecting portion, and the radial dimension of the connecting portion is smaller than the radial dimension of the tail end, and the telescopic hook holds the push rod by hooking the connecting surface between the tail end and the connecting portion.

[0018] As a further improvement of the present invention, the telescopic hook includes a sliding block, a second elastic member and two rotating arms respectively hinged on the sliding block, and the two rotating arms have hook claws arranged opposite to each other; the second elastic member is located at the bottom of the box body and abuts against the sliding block inside the box body, and the two rotating arms are extended out of the box body by pushing the sliding block; there is a movable buckle inside the box body, and when the rotating arm is extended out of the box body, the sliding block is pushed until the rotating arm is retracted into the box body, and the movable buckle locks the sliding block; when the rotating arm is retracted into the box body, the sliding block is pushed again, and the movable buckle releases the sliding block.

[0019] As a further improvement of the present invention, the free end of the first transmission portion of the inner handle has an axial convex ring, and the convex ring has a third positioning groove;

[0020] The inner cover of the handle is provided with a circular hole for the convex ring to pass through, and the interior door handle lock includes a fixed ring, a reset spring and a retaining spring. The fixed ring is provided with a limiting plate and a square hole for the square rod to pass through, and the square rod passes through the square hole and is assembled with the fixed ring; the fixed ring is assembled on the inner cover of the handle through the reset spring and the retaining spring, and the limiting plate is embedded in the third positioning groove of the convex ring passing through the circular hole.

[0021] The present invention has the following beneficial effects: a pressing piece installed in the inner handle pushes the positioning column in the first installation position to slide into the second installation position of the handle inner cover, and the telescopic hook in the buckle box holds the push rod to axially fix the positioning column and the pressing piece, so that the inner handle cannot rotate relative to the handle inner cover, thereby locking the door. It is not only simple to operate but also relatively low in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the inner side of an indoor door handle lock provided by an embodiment of the present invention.

[0023] Figure 2 Schematic diagram of the outer side of an indoor door handle lock provided by an embodiment of the present invention.

[0024] Figure 3 The figure is a schematic diagram of the exploded structure of an indoor door handle lock provided by an embodiment of the present invention.

[0025] Figure 4 The diagram is a schematic diagram showing an opening of a buckle box in an interior door handle lock provided by an embodiment of the present invention, in which a telescopic hook of the buckle box is exposed to the outside of the box body.

[0026] Figure 5 The diagram is a schematic diagram showing the telescopic hook of the buckle box in the interior door handle lock provided by an embodiment of the present invention being retracted into the opening of the box body.

[0027] Figure 6 It is a schematic diagram of the cross-sectional structure of a buckle box in an indoor door handle lock provided by an embodiment of the present invention.

[0028] Figure 7 Schematic diagram of a push rod in an indoor door handle lock provided by an embodiment of the present invention.

[0029] Figure 8 It is a schematic diagram of a positioning column in an indoor door handle lock provided by an embodiment of the present invention.

[0030] Figure 9 The figure is a schematic cross-sectional structural diagram of an indoor door handle lock provided by an embodiment of the present invention when unlocked.

[0031] Figure 10 It is a schematic cross-sectional structural diagram of the interior door handle lock provided by an embodiment of the present invention when unlocked at another angle.

[0032] Figure 11 The figure is a schematic diagram of the cross-sectional structure of the interior door handle lock provided by an embodiment of the present invention when locked.

[0033] Figure 12 It is a schematic cross-sectional structural diagram of the interior door handle lock provided by an embodiment of the present invention when locked at another angle. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] like Figure 1-Figure 2 Figure 2 shows a schematic diagram of an interior door handle lock provided by an embodiment of the present invention. This interior door handle lock can be used on interior doors such as residential rooms and office interior doors, and can provide privacy and security for indoor spaces. The interior door handle lock of this embodiment includes an inner handle 10, an inner handle cover 20, a locking assembly, a positioning post, a square rod 31, a bolt assembly, and an outer handle. The inner handle cover 20 is mounted on the inner side of the door panel of the interior door. The inner handle 10 is mounted on the inner handle cover 20 and is transmission-connected to the square rod 31, which passes through the door panel and is assembled to the inner handle cover 20. The locking assembly and positioning post are mounted on the inner handle 10 and the inner handle cover 20. The bolt assembly is installed inside the door panel. A square rod 31 passes through the bolt assembly inside the door panel and connects to the outer handle on the outside of the door panel. The inner handle 10, square rod 31, bolt assembly, and outer handle all work in tandem. When the inner handle 10 rotates, the square rod 31, bolt assembly, and outer handle all rotate synchronously. If the inner handle 10 cannot rotate, the square rod 31, bolt assembly, and outer handle also cannot rotate. Rotating either the inner handle 10 or the outer handle drives the square rod 31, thereby controlling the bolt assembly's extension and retraction, allowing the interior door to be opened and closed.

[0036] The inner handle 10 comprises a first grip portion 11 and a first transmission portion 12, wherein the first transmission portion 12 is connected to one end of the first grip portion 11, and the free end of the first transmission portion 12 (i.e., the end away from the first grip portion 11) has a first mounting position, which can be specifically formed by a groove on the end surface of the free section of the first rotating portion 12. The handle inner cover 20 has a second mounting position 21, which can be specifically formed by a groove on the outer side surface of the handle inner cover (i.e., the surface facing away from the door panel). The inner handle 10 is rotatably connected to the handle inner cover 20 in a coaxial manner with the first and second mounting positions 21, and the inner handle 10 drives the square rod 31 to rotate to achieve telescopic control of the lock tongue.

[0037] Combine Figure 3 and Figure 8As shown, the positioning post 45 is formed of a cylindrical body with a non-circular cross-section, and the cross-sections of the first mounting position on the first transmission part 12 and the second mounting position 21 on the handle inner cover 20 are respectively adapted to the cross-section of the positioning post 45 (for example, the shapes are the same but the radial dimensions are slightly different), so that the positioning post 45 can slide within the first and second mounting positions 21. The positioning post 45 is installed in the first mounting position of the first transmission part 12, and after the inner handle 10 is installed on the handle inner cover 20, the first and second mounting positions 21 are connected or the distance between the first and second mounting positions 21 is less than the axial length of the positioning post 45. As a result, the positioning post 45 is partially embedded in the second mounting position 21 of the handle inner cover 20 under the push of the locking assembly installed in the first transmission part 12, thereby locking the inner handle 10 and the handle inner cover 20 relative to each other, that is, the inner handle 10 cannot rotate relative to the handle inner cover 20, and accordingly, the lock tongue cannot be extended or retracted.

[0038] Combine Figure 3-Figure 7 As shown, the locking assembly includes a pressing member, a buckle box 44, and a push rod 47, wherein the first end of the pressing member has a first mounting groove, the buckle box 44 includes a box body 441 and a telescopic hook 442 mounted on the box body 441, and the buckle box 44 is mounted in the first mounting groove of the pressing member. The head end of the push rod 47 passes through the positioning column 45 and is slidably connected to the positioning column 45. When the positioning column 45 is pushed by the pressing member to slide into the second mounting position 21, the buckle box 44 moves toward the push rod 47 driven by the pressing member until the push rod 47 pushes the telescopic hook 442 to retract into the box body 441 and hold the push rod 47 tightly, thereby axially fixing the positioning column 45 and the pressing member. That is, when the telescopic hook 442 holds the push rod 47 tightly, neither the positioning column 45 nor the pressing member can move axially. In one embodiment of the present invention, the pressing member is composed of an inner button 41, a connecting post 42, and a screw 43. The inner button 41 and the connecting post 42 are axially locked and fixed together by the screw 43. The first mounting slot is formed by a groove on the end surface of the connecting post 42 facing away from the inner button 41. Of course, in actual applications, the pressing member can also adopt an integrated structure.

[0039] The interior door handle lock utilizes a pressing member installed within the interior handle 10 to push a positioning post 45 in a first mounting position into a second mounting position 21 of the handle inner cover 20. A retractable hook 442 within the buckle box 44 then grips the push rod 47, securing the positioning post 45 and the pressing member axially. This prevents the interior handle 10 from rotating relative to the handle inner cover 20, thereby locking the door. This design is both simple to operate and relatively cost-effective. Furthermore, since the locking assembly is installed within both the interior handle 10 and the handle inner cover 20, it avoids occupying additional space, resulting in a relatively compact interior door handle lock.

[0040] In one embodiment of the present invention, a first elastic member 46 is installed between the positioning column 45 and the handle inner cover 20. The first elastic member 46 can be a spring, and the two ends of the first elastic member 46 are respectively in contact with the handle inner cover 20 and the positioning column 45. When the positioning column 45 does not enter the second installation position 21 of the handle inner cover 20, the first elastic member 46 is not compressed or the compression amount is small. Figure 9 、 Figure 10 When the positioning column 45 is pushed into the second mounting position 21, the compression amount of the first elastic member 46 is large, as shown Figure 11 、 Figure 12 As shown, at this time, the first elastic member 46 applies a force to the positioning column 45 to push it away from the second installation position 21, as shown in FIG. Figure 10 and Figure 12 shown.

[0041] When the positioning column 45 is axially fixed, the box body 441 of the buckle box 44 is moved forward by pushing the pressing piece again, and the telescopic hook 442 that follows the forward movement of the box body 441 is pushed again by the unmoved push rod 47 and pops out of the box body 441 to release the tail end of the push rod 47, and the first elastic member 46 pushes the positioning column 45 to leave the second installation position 21 through its own elastic force. At this time, the positioning column 45 is only located in the first installation position of the inner handle 10, and the inner handle 10 and the handle inner cover 20 are unlocked.

[0042] Through the above method, the interior door handle lock can lock and unlock the interior door without a key, thereby reducing costs while ensuring indoor privacy.

[0043] like Figure 6 As shown, in one embodiment of the present invention, the body 441 of the buckle box 44 has a receiving cavity 4411 with an opening located at an end surface. The retractable hook 442 includes a sliding block 4421, a second elastic member 4423, and two rotating arms 4422. The second elastic member 4423 may be a spring or a similar device capable of elastic deformation. The cross-sectional shape and dimensions of the sliding block 4421 match those of the receiving cavity 4411 of the body 441. The two rotating arms 4422 are respectively hinged to the sliding block 4421 and have opposing hook claws on each of the rotating arms. The sliding block 4421 is installed in the accommodating cavity 4411 of the box body 441 and can slide up and down in the accommodating cavity 4411. The second elastic member 4423 is also installed in the accommodating cavity 4411 and its two ends are respectively abutted against the bottom wall of the accommodating cavity 4411 and the sliding block 4421, and by pushing the sliding block 4421, the two rotating arms 4422 are extended out of the box body 441 (when the sliding block 4421 is not subjected to external force).

[0044] The housing 441 has a movable buckle (not shown) in the housing 441, and when the two rotating arms 4422 extend out of the housing 441, as shown in FIG. Figure 4 As shown, when the sliding block 4421 is pushed until the rotating arm 4422 is retracted into the box body 441 (overcoming the elastic force of the second elastic member 4423), the movable buckle locks the sliding block 4421 so that the two rotating arms 4422 remain in the box body 441, as shown in FIG. Figure 5 When the arm 4422 is retracted into the box body 441, as shown Figure 5 As shown, if the sliding block 4421 is pushed again (towards the bottom of the box body 441), the movable buckle releases the sliding block 4421, and the sliding block 4421 slides outward under the push of the second elastic member 4423, and the two rotating arms 4422 extend out of the box body 441, as shown in FIG. Figure 4 shown.

[0045] In practical applications, the buckle box 44 may also adopt any existing structure, as long as the telescopic hook can hold the push rod 47 tightly when pressed once, and release the push rod 47 when pressed again while holding the push rod 47 tightly.

[0046] In one embodiment of the present invention, the above-mentioned first transmission part 12 is vertically connected to one end of the first handle part 11, and the first transmission part 12 includes a first through hole, and the first through hole extends from the bottom of the first mounting position to the outside of the first transmission part 12, and the pressing member and the buckle box 44 are assembled in the first through hole and abut against the positioning column 45 in the first mounting position. The tail end of the pressing member (for example, the tail end of the inner button 41) is exposed from the tail end of the first through hole. When in use, you only need to hold the first handle part 11 and press the inner button 41 from the outside of the first transmission part 12 with your thumb to achieve the locking and unlocking of the interior door handle lock, which greatly facilitates the locking and unlocking operations of the interior door handle lock.

[0047] like Figure 8 As shown, in one embodiment of the present invention, the positioning column 45 includes a cylindrical body 451 and a plurality of ridges 452, each ridge 452 protruding from the outer periphery of the cylindrical body 451 and arranged along the axial direction of the cylindrical body 451. Figure 3 As shown, the first mounting position includes a first positioning groove 123 corresponding to the ridge 452, and the second mounting position 21 includes a second positioning groove 22 corresponding to the ridge 452, and when the positioning column 45 is installed in the first mounting position, the ridge 452 is embedded in the first positioning groove 123, and when the positioning column 45 is pushed into the second mounting position 21, at least a portion of the ridge 452 is embedded in the second positioning groove 22, and the other portion is embedded in the first positioning groove 123. That is, the positioning column 45 is respectively embedded in the first positioning groove 123 and the second positioning groove 22 through the ridge 452 to lock the inner handle 10 and the handle inner cover 20. The above-mentioned ridge 452 can also cooperate with the first positioning groove 123 and the second positioning groove 22 to guide the sliding direction of the positioning column 45. Similarly, as shown in FIG. Figure 4 、 Figure 5As shown, the pressing member (eg, the connecting column 42 ) may also have a corresponding convex wing 421 , which may be embedded in the first positioning groove 123 , thereby guiding the moving direction of the pressing member during its axial movement to ensure smooth movement.

[0048] In practical applications, the positioning column 45 may also be in the shape of a polygonal column, which can also lock the inner handle 10 and the handle inner cover 20 .

[0049] The positioning post 45 further includes a first central through-hole 453 disposed axially. The first central through-hole 453 is sufficiently sized to allow the telescopic hook 442 to open. When the pressing member and the buckle box 44 are assembled in the first through-hole of the inner handle 10 and the positioning post 45 is installed in the first mounting position, the front end of the buckle box 44 extends into the first central through-hole 453. This structure makes the entire locking assembly and positioning post 45 relatively compact, occupying relatively little space.

[0050] like Figure 7 As shown, in one embodiment of the present invention, the push rod 47 specifically includes a tail end 471, a connecting portion 472, a middle portion 473 and a front end 475, and the radial dimension of the connecting portion 472 is smaller than the radial dimension of the tail end 471. In this way, the telescopic hook 442 can hold the push rod 47 tightly by hooking the cross-section connecting the tail end 471 and the connecting portion 472 to prevent it from loosening.

[0051] In particular, the first elastic member 46 disposed between the positioning post 45 and the handle inner cover 20 can be sleeved onto the push rod 47, thereby ensuring the direction of the elastic force of the first elastic member 46. Accordingly, a support wing 474 can be provided between the middle portion 473 and the front end 475, and one end of the first elastic member 46 can abut against the support wing 474, that is, the first elastic member 46 indirectly abuts against the handle inner cover 20.

[0052] like Figure 9 As shown, in one embodiment of the present invention, the square rod 31 includes a second central through hole arranged along the axial direction. Accordingly, the interior door handle lock also includes a push rod screw 48 and a push rod spring 49. The head end of the push rod 47 has a threaded hole. The push rod screw 48 is inserted into the second central through hole of the square rod 31 from the head end of the square rod 31 and is threadedly connected to the push rod 47 located at the tail end of the square rod 31. The two ends of the push rod spring 49 are respectively in contact with the screw head of the push rod screw 48 and the head end of the square rod 31. When the push rod 47 is tightly held by the telescopic hook 442, the push rod screw 48 can be pushed, and the push rod 47 can push the telescopic hook 442, so that the telescopic hook 442 pops out of the box body 441 and opens (the push rod 47 is released), so that the first elastic member 46 pushes the positioning column 45 to leave the second mounting position 21 through its own elastic force, so that the inner handle 10 and the handle inner cover 20 are unlocked.

[0053] In particular, Figure 12As shown, the interior door handle lock further includes an outer handle 50 and an outer handle cover 60, with the outer handle 50 being rotatably connected to the outer handle cover 60. The square rod 31 passes through the outer handle cover 60 and is in transmission connection with the outer handle 50. The outer handle 50 includes a second grip portion 51 and a second transmission portion 52 connected to one end of the second grip portion 51. The second transmission portion 52 has a second mounting slot 521, with the opening of the second mounting slot 521 located on the end surface of the free end of the second transmission portion 52. The screw head of the push rod screw 48 is inserted into the second mounting slot 521. The second transmission portion 52 also has a second through-hole 522 for inserting an emergency device 70 (e.g., a thin rod) into the second mounting slot 521 to push the push rod screw 48 axially relative to the square rod 31. That is, from outside the interior door, the emergency device 70 can be inserted into the second through-hole 522 to push the push rod screw 48 axially, thereby achieving emergency unlocking of the interior door handle lock.

[0054] In one embodiment of the present invention, the free end of the first transmission portion 12 of the inner handle 10 has an axial protrusion 121, and the protrusion 121 has a third positioning groove 122 (for example, the third positioning groove 122 can be formed by a notch on the protrusion 121). Correspondingly, the handle inner cover 20 has a circular hole for the protrusion 121 to pass through (the second mounting position 21 can be formed by a portion of the circular hole). The tail end of the square rod 31 is provided with a fixing ring 311, and the fixing ring 311 is provided with a limiting piece 3111. The above-mentioned fixing ring 311 is assembled on the handle inner cover 20 through a return spring 32 and a retaining ring 33, and the limiting piece 3111 on the fixing ring 311 is embedded in the third positioning groove 122 of the convex ring 121 passing through the circular hole 21. Therefore, when the inner handle 10 rotates, the fixing ring 311 can be driven to rotate by the limiting piece 3111 embedded in the third positioning groove 122, thereby driving the square rod 31 to rotate, thereby realizing the extension and retraction control of the lock tongue; similarly, when the square rod 31 is driven to rotate by the outer handle 50, the square rod 31 also drives the inner handle 10 to rotate through the limiting piece 3111.

[0055] When locking the above interior door handle, Figure 9-10, press the inner button 41 toward the handle inner cover 20, and the connecting column 42 continues to push the positioning column 45 under the push of the inner button 41, so that the front end of the positioning column 45 slides from the first installation position into the second installation position 21 on the handle inner cover 20 (the first elastic member 46 is compressed). At the same time, the telescopic hook 442 in the buckle box 44 that moves with the connecting column 42 is blocked by the push rod 47 and retracts into the box body 441 under the push of the push rod 47 and holds the tail end 471 of the push rod 47 tightly (the telescopic hook 442 is blocked by the inner end of the box body 441). The movable buckle is fastened and cannot extend out of the box body 441, and the second elastic member 4423 is also compressed). The buckle box 44 cannot move backward when the push rod is pulled (even if the inner button 41 is released). Similarly, the connecting column 42 and the inner button cannot move backward. The positioning column 45 is blocked by the connecting column 42, and its front end remains in the second installation position 21 of the handle inner cover 20. The inner handle 10 and the handle inner cover 20 are locked and cannot rotate relative to each other, so that the outer handle connected to the square rod 31 cannot rotate relative to each other, thereby realizing the locking of the interior door handle.

[0056] When unlocking the interior door handle when it is locked, Figure 11-12 By continuing to press the inner button 41 toward the handle inner cover 20, the connecting column 42 and the positioning column 45 move forward further, causing the first elastic member 46 to be further compressed. At the same time, the telescopic hook 442 in the buckle box 44 that moves with the connecting column 42 is blocked by the push rod 47 and pushes the second elastic member 4423 to be further compressed. At the same time, the active buckle in the box body 441 releases the telescopic hook 442. After the inner button 41 is released, the first elastic member 46 pushes the positioning column 45 back, and the connecting column 42 and the buckle box 44 also retreat accordingly. The telescopic hook 442 is released by the active buckle in the box body 441, and therefore also moves forward and extends out of the box body 441 under the push of the second elastic member 4423 and releases the push rod 47, so that the first elastic member 46 further pushes the positioning column 45 to leave the second mounting position 21, and the inner handle 10 and the handle inner cover 20 are unlocked. At this time, both the inner handle 10 and the outer handle 50 can drive the square rod 31 to rotate.

[0057] In addition, when the above-mentioned indoor door handle is locked, it can also be unlocked outdoors and emergency unlocking can be performed. Specifically, the emergency device 70 can be inserted into the second through hole 522 and the push rod screw 48 can be pushed to move toward the inner handle 10. The push rod 47 connected to the push rod screw 48 pushes the telescopic hook 442, so that the telescopic hook 442 also slides toward the inner handle 10 and pushes the second elastic member 4423 to be further compressed until the movable buckle in the box body 441 releases the telescopic hook 442. After the emergency device 70 is removed, the push rod spring 49 pushes the push rod screw 48 and the push rod 47 to reset (during this process, the first elastic member 46 will also push the positioning column 45, the connecting column 42 and the buckle box 44 back). The telescopic hook 442 is released by the movable buckle in the box body 441, so it is also pushed forward by the second elastic member 4423 to extend out of the box body 441 and release the push rod 47. At this time, the first elastic member 46 pushes the positioning column 45 back and leaves the second installation position 21, and the inner handle 10 and the handle inner cover 20 are unlocked. At this time, the inner handle 10 and the outer handle 50 can both drive the square rod 31 to rotate.

[0058] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An interior door handle lock, characterized in that: Including inner handle, handle inner cover, locking assembly, positioning column and square rod; The inner handle includes a first grip portion and a first transmission portion connected to one end of the first grip portion; the first transmission portion includes a first mounting position located at a free end, the handle inner cover includes a second mounting position, and the inner handle is rotatably connected to the handle inner cover in a manner such that the first mounting position and the second mounting position are coaxially connected, and the inner handle drives the square rod to rotate to achieve telescopic control of the lock tongue; The positioning post is formed of a cylindrical body with a non-circular cross-section, and the cross-sections of the first mounting position and the second mounting position are respectively adapted to the cross-sections of the positioning post; the positioning post is mounted in the first mounting position of the first transmission part, and is partially embedded in the second mounting position of the handle inner cover under the push of a locking assembly installed in the first transmission part, so that the inner handle and the handle inner cover are relatively locked; The locking assembly includes a pressing piece, a buckle box and a push rod, the end of the first end of the pressing piece has a first mounting groove, the buckle box is installed in the first mounting groove and includes a box body and a telescopic hook installed on the box body; the head end of the push rod passes through the positioning column and is slidably connected to the positioning column, and in the process of the positioning column being pushed by the pressing piece to slide into the second mounting position, the buckle box moves toward the push rod driven by the pressing piece until the push rod pushes the telescopic hook to retract into the box body and holds the push rod, thereby fixing the positioning column axially.

2. The interior door handle lock according to claim 1, characterized in that: A first elastic member is provided between the positioning post and the handle inner cover for pushing the positioning post away from the second installation position, and when the positioning post is pushed by the pressing member to slide into the second installation position, the first elastic member is compressed; When the positioning column is axially fixed, the box body of the buckle box is moved forward by pushing the pressing piece again, and the telescopic hook is pushed again by the push rod and pops out of the box body to release the push rod, and the first elastic piece pushes the positioning column to leave the second installation position through its own elastic force, so that the inner handle and the handle inner cover are unlocked.

3. The interior door handle lock according to claim 1, characterized in that: The first transmission part is vertically connected to one end of the first handle part, and the first transmission part includes a first through hole, which extends from the bottom of the first mounting position to the outside of the first transmission part, and the pressing piece and the buckle box are assembled in the first through hole and the first mounting position, and abut against the positioning column in the first mounting position, and the tail end of the pressing piece is exposed from the tail end of the first through hole.

4. The interior door handle lock according to claim 3, characterized in that: The positioning column includes a first central through hole arranged along the axial direction, and when the pressing member and the buckle box are assembled in the first through hole and the positioning column is installed in the first installation position, the front end of the buckle box is embedded in the first central through hole.

5. The interior door handle lock according to claim 1, characterized in that: The positioning column includes a cylindrical body and a plurality of convex strips protruding from the outer circumference of the cylindrical body and arranged along the axial direction of the cylindrical body. The first installation position includes a first positioning groove corresponding to the convex strip, and the second installation position includes a second positioning groove corresponding to the convex strip. When the positioning column is installed in the first installation position, the convex strip is embedded in the first positioning groove. When the positioning column is pushed into the second installation position, at least a portion of the convex strip is embedded in the second positioning groove, and the remaining portion is embedded in the first positioning groove.

6. The interior door handle lock according to claim 2, characterized in that: The square rod includes a second central through hole arranged along the axial direction, and the interior door handle lock also includes a push rod screw and a push rod spring. The push rod screw is inserted into the second central through hole of the square rod from the head end of the square rod and is threadedly connected to the push rod located at the tail end of the square rod. The two ends of the push rod spring are respectively in contact with the screw head of the push rod screw and the head end of the square rod, and when the push rod is tightly clamped by the telescopic hook, the telescopic hook pops out of the box body and opens under the push of the push rod screw, and the first elastic member pushes the positioning column to leave the second installation position through its own elastic force, so that the inner handle and the handle inner cover are unlocked.

7. The interior door handle lock according to claim 6, characterized in that: The interior door handle lock further comprises an outer handle and a handle outer cover, wherein the outer handle is rotatably connected to the handle outer cover; the square rod passes through the handle outer cover and is transmission-connected to the outer handle; The external handle includes a second grip portion and a second transmission portion connected to one end portion of the second grip portion, the second transmission portion has a second mounting groove, and the opening of the second mounting groove is located on the end face of the free end of the second transmission portion, the screw head of the push rod screw is inserted into the second mounting groove; the second transmission portion includes a second through hole for inserting an emergency device into the second mounting groove and pushing the push rod screw to move axially relative to the square rod.

8. The interior door handle lock according to claim 6, characterized in that: The push rod includes a tail end and a connecting portion, and the radial dimension of the connecting portion is smaller than the radial dimension of the tail end. The telescopic hook holds the push rod by hooking the connecting surface between the tail end and the connecting portion.

9. The interior door handle lock according to any one of claims 1 to 8, characterized in that: The telescopic hook includes a sliding block, a second elastic member and two rotating arms respectively hinged on the sliding block, and the two rotating arms are provided with hook claws arranged opposite to each other; the second elastic member is located at the bottom of the box body and abuts against the sliding block in the box body, and the two rotating arms are extended out of the box body by pushing the sliding block; a movable buckle is provided in the box body, and when the rotating arm is extended out of the box body, the sliding block is pushed until the rotating arm is retracted into the box body, and the movable buckle locks the sliding block; when the rotating arm is retracted into the box body, the sliding block is pushed again, and the movable buckle releases the sliding block.

10. The interior door handle lock according to any one of claims 1 to 8, characterized in that: The free end of the first transmission part of the inner handle has an axial convex ring, and the convex ring has a third positioning groove; The inner cover of the handle has a circular hole for the convex ring to pass through, the tail end of the square rod has a fixing ring, the fixing ring has a limiting plate, the fixing ring is assembled on the inner cover of the handle through a reset spring and a retaining ring, and the limiting plate is embedded in the third positioning groove of the convex ring passing through the circular hole.

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