Back locking mechanism of door lock

Abstract

A back locking mechanism of a door lock comprises a panel and a handle, the handle is rotatably connected to the panel through a transmission mechanism, a rotating shaft is fixedly connected to the inner side of the panel and the tail end of the transmission mechanism of the handle, and the back locking mechanism is arranged below the handle. According to the back locking mechanism of the door lock, the rotating shaft is arranged on the inner side of the handle, the back locking mechanism matched with the rotating shaft is arranged on the panel, the back locking mechanism comprises the knob device and the locking block matched with the rotating shaft, the ball screw is arranged at the top end of the knob device, the positioning groove is formed in the bottom end of the locking block, and the knob device is rotated upwards. The cam can abut against the locking block to move upwards, the glass bead screw and the positioning groove are matched to play a positioning role, the lower end of the rotating shaft and the upper end of the locking block are matched to be in a locking state, the rotary knob device is rotated downwards, the locking block is driven by the reset spring to move downwards and return to an unlocking state, the counter locking mechanism is simple in structure and convenient to assemble, and the material and manufacturing cost is reduced. And a good locking effect is achieved.

Description

Technical Field

[0001] This utility model relates to a deadbolt mechanism for a door lock. Background Technology

[0002] Currently, most mechanical door locks on the market are equipped with a deadbolt mechanism to lock the door. When in use, simply rotating or moving the deadbolt knob or lever will activate the locking mechanism inside the door lock to lock the door, increasing the security performance of the door lock. However, the deadbolt mechanism of current door locks is complex, difficult to assemble, and has high material and labor costs. Utility Model Content

[0003] This utility model provides a deadbolt mechanism for a door lock.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0005] A door lock deadbolt mechanism includes a panel and a handle. The handle is rotatably connected to the panel via a transmission mechanism. On the inner side of the panel, a rotating shaft is fixedly connected to the end of the transmission mechanism of the handle. A deadbolt mechanism is provided below the handle. The deadbolt mechanism includes a cooperating knob device and a locking block. A through hole is provided on the panel. The knob device includes a manual knob and a cam arranged opposite each other. The manual knob is located on the outer side of the panel, and the cam is located on the inner side of the panel. The manual knob is connected to the cam through the through hole of the panel via the transmission mechanism. The upper end of the locking block is provided with a groove that cooperates with the lower end of the rotating shaft. The distance between the locking block and the bottommost point of the cam is less than the longest radial distance of the cam.

[0006] Preferably, the lower end of the rotating shaft is a rounded rectangle, and the groove is a rounded rectangle.

[0007] Preferably, the bottom end of the rotating shaft is provided with an outward protrusion, and the lower end of the groove is provided with an extension groove that mates with the protrusion. The inner side of the panel is also provided with a limit post, which is hollow inside and located inside the extension groove. A spring is provided at the lower end of the extension groove, with the upper end of the spring abutting against the limit post and the lower end abutting against the locking block.

[0008] Preferably, the lower end of the cam is fixedly connected to the manual knob using a screw.

[0009] Preferably, a first limiting block and a second limiting block are respectively provided on the left and right sides of the lower end of the cam, and the first limiting block and the second limiting block limit the range of motion of the cam and the manual knob.

[0010] Preferably, the locking block is positioned above the cam, the lower end of the locking block is provided with a positioning groove, the top of the cam is provided with a ball screw that mates with the positioning groove, the ball screw body is fitted inside the cam, and the steel ball is positioned on the outside of the cam and mates with the positioning groove.

[0011] Preferably, the extension groove includes a first arc-shaped groove, a second arc-shaped groove, and a spring groove from top to bottom. The width of the first arc-shaped groove is greater than that of the second arc-shaped groove, and the first arc-shaped groove cooperates with the protrusion.

[0012] Preferably, a pressure plate is fixed to the front of the locking block relative to the spring groove.

[0013] Preferably, a cover plate is provided on the outer side of the rotating shaft and the locking block, and the lower end of the cover plate is in contact with the upper end plate surface of the locking block.

[0014] Preferably, the upper end of the cover plate is fixed above the rotating shaft, and the lower end is fixed on the limiting post.

[0015] Compared with the prior art, the deadbolt mechanism of this utility model door lock is provided by setting a rotating shaft on the inside of the handle and setting a deadbolt mechanism on the panel that cooperates with the rotating shaft. The deadbolt mechanism includes a knob device and a locking block that cooperates with the rotating shaft. The top of the knob device is provided with a ball screw, and the bottom of the locking block is provided with a positioning groove. When the knob device is rotated upward, the cam will push the locking block upward. The ball screw cooperates with the positioning groove to play a positioning role. The lower end of the rotating shaft cooperates with the upper end of the locking block to be in the locked state. When the knob device is rotated downward, the locking block is driven downward by the reset spring to return to the unlocked state. The deadbolt mechanism has a simple structure, is easy to assemble, reduces material and manufacturing costs, and achieves a good locking effect. Attached Figure Description

[0016] Figure 1 This is a first perspective view of the deadbolt mechanism of the door lock of this utility model.

[0017] Figure 2 This is a second perspective view of the deadbolt mechanism of the door lock of this utility model.

[0018] Figure 3 This is a schematic diagram of the locking state of the deadbolt mechanism of the door lock of this utility model.

[0019] Figure 4 The deadbolt mechanism of the door lock of this utility model Figure 3 Enlarged view of point A.

[0020] Figure 5 This is a schematic diagram showing the unlocking state of the deadbolt mechanism of the door lock of this utility model.

[0021] Figure 6 The deadbolt mechanism of the door lock of this utility model Figure 5 Enlarged view at point B. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] like Figures 1 to 6As shown, a door lock deadbolt mechanism includes a panel 1 and a handle 2. The handle 2 is rotatably connected to the panel 1 via a transmission mechanism. On the inner side of the panel 1, a rotating shaft 4 is fixedly connected to the end of the transmission mechanism of the handle 2. The rotating shaft 4 can rotate with the handle 2. The lower end of the rotating shaft 4 is rounded rectangular, and an outward protrusion 41 is provided at the bottom end of the rotating shaft 4.

[0024] A locking mechanism 3 is provided below the handle 2. The locking mechanism 3 includes a cooperating knob device 31 and a locking block 32. A through hole is provided on the panel 1. The knob device 31 includes a manual knob 311 and a cam 312 arranged opposite each other. The manual knob 311 is located on the outer side of the panel 1, and the cam 312 is located on the inner side of the panel 1. The manual knob 311 is connected to the cam 312 through the through hole of the panel 1 via a transmission mechanism. The lower end of the cam 312 is fixedly connected to the manual knob 311 with a screw. When the manual knob 311 is rotated on the outer side of the panel 1, it can drive the cam 312 to rotate. A first limiting block and a second limiting block are respectively provided on the left and right sides of the lower end of the cam 312. The first limiting block and the second limiting block limit the range of motion of the cam 312 and the manual knob 311. The cam 312 is oval-shaped.

[0025] The locking block 32 is positioned above the cam 312. The distance between the locking block 32 and the bottom of the cam 312 is less than the longest radial distance of the cam 312. The locking block 32 has a symmetrical structure. The lower end of the locking block 32 is provided with a positioning groove 321. The top of the cam 312 is provided with a ball screw 8 that cooperates with the positioning groove 321. The ball screw 8 is fitted inside the cam 312. The steel ball is positioned on the outside of the cam 312 and cooperates with the positioning groove 321.

[0026] The upper end of the locking block 32 is provided with a groove 322 that mates with the lower end of the rotating shaft 4. The groove 322 is rounded rectangular in shape. The lower end of the groove 322 is provided with an extension groove that mates with the protrusion 41. The locking block 32 and the rotating shaft 4 are arranged vertically opposite each other. The extension groove includes a first arc groove, a second arc groove, and a spring groove from top to bottom. The width of the first arc groove is greater than that of the second arc groove. The first arc groove mates with the protrusion 41. A limit post 11 is also provided on the inner side of the panel 1. The limit post 11 is hollow inside and is located inside the extension groove. A spring 5 is provided in the spring groove. The upper end of the spring 5 abuts against the limit post 11, and the lower end abuts against the locking block 32. A pressure plate 6 is also fixed on the front of the locking block 32 opposite to the spring groove to prevent the spring 5 from falling off.

[0027] A cover plate 7 is provided on the outside of the rotating shaft 4 and the locking block 32. The upper end of the cover plate 7 is fixed above the rotating shaft 4, and the lower end is fixed on the limiting post 11. The lower end of the cover plate 7 is in contact with the upper plate surface of the locking block 32, thereby restricting the locking block 32 to the inside of the panel 1.

[0028] When locking is required, rotate the manual knob 311 on the outside of panel 1 to rotate the cam 312 upward. During the upward rotation, the cam 312 will push the locking block 32 upward. The ball screw 8 and the positioning groove 321 cooperate to play a positioning role. At this time, the cam 312 abuts against the first limit block and the lower end of the rotating shaft 4 cooperates with the upper end of the locking block 32 to be in a locked state, and the handle 2 cannot be rotated. During the upward movement of the locking block 32, the spring 5 is compressed and the limit post 11 enters the second arc-shaped groove. When the manual knob 311 is rotated to reset the cam 312, it forces the ball screw 8 to leave the positioning groove 321, the cam 312 abuts against the second limit block, the compressed spring 5 is reset, and the locking block 32 is pushed downward. The locking block 32 is reset, the groove 322 of the locking block 32 leaves the lower end of the rotating shaft 4, the rotating shaft 4 is in an unlocked state, and the handle 2 can be rotated.

[0029] The deadbolt mechanism of this door lock is achieved by setting a rotating shaft 4 inside the handle 2 and setting a deadbolt mechanism 3 on the panel 1 that cooperates with the rotating shaft 4. The deadbolt mechanism 3 includes a knob device 31 and a locking block 32 that cooperates with the rotating shaft 4. A ball screw 8 is set at the top of the knob device 31 and a positioning groove 321 is set at the bottom of the locking block 32. When the knob device 31 is rotated upward, the cam 312 will push the locking block 32 upward. The ball screw 8 cooperates with the positioning groove 321 to play a positioning role. The lower end of the rotating shaft 4 cooperates with the upper end of the locking block 32 to be in a locked state. When the knob device 31 is rotated downward, the locking block 32 is driven downward by the reset spring 5 to return to the unlocked state. The deadbolt mechanism has a simple structure, is easy to assemble, reduces material and manufacturing costs, and achieves a good locking effect.

[0030] Finally, it should be noted that the above embodiments only illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A latch mechanism of a door lock comprising a panel (1) and a handle (2) which is rotatably connected to the panel (1) by a transmission mechanism, characterized in that, On the inner side of the panel (1), a rotating shaft (4) is fixedly connected to the end of the transmission mechanism of the handle (2), and an anti-lock mechanism (3) is arranged below the handle (2). The anti-lock mechanism (3) comprises a knob device (31) and a locking block (32) that cooperate with each other. A through hole is arranged on the panel (1). The knob device (31) comprises a manually operated knob (311) and a cam (312) arranged oppositely. The manually operated knob (311) is arranged on the outer side of the panel (1), and the cam (312) is arranged on the inner side of the panel (1). The manually operated knob (311) is connected with the cam (312) through the through hole of the panel (1) by a transmission mechanism. The upper end of the locking block (32) is provided with a groove (322) matched with the lower end of the rotating shaft (4), and the distance between the locking block (32) and the bottom end of the cam (312) is less than the longest radial distance of the cam (312).

2. A latch mechanism for a door lock according to claim 1, wherein The lower end of the rotating shaft (4) is in the shape of a rounded rectangle, and the groove (322) is in the shape of a rounded rectangle.

3. The deadbolt mechanism of claim 1, wherein, The bottom end of the rotating shaft (4) is provided with an outward protrusion (41), and the lower end of the groove (322) is provided with an extension groove matched with the protrusion (41). The inner side of the panel (1) is further provided with a limiting column (11) which is hollow inside and arranged inside the extension groove. The lower end of the extension groove is provided with a spring (5), the upper end of the spring (5) abuts against the limiting column (11), and the lower end abuts against the locking block (32).

4. The deadbolt mechanism of claim 1, wherein, The lower end of the cam (312) is fixedly connected with the manually operated knob (311) by a screw.

5. The deadbolt mechanism of claim 1, wherein, The left and right sides of the lower end of the cam (312) are respectively provided with a first limiting block and a second limiting block, which limit the movement range of the cam (312) and the manually operated knob (311).

6. The deadbolt mechanism of claim 1, wherein, The locking block (32) is arranged above the cam (312), and the lower end of the locking block (32) is provided with a positioning groove (321). The top end of the cam (312) is internally provided with a wave bead screw (8) matched with the positioning groove (321). The body of the wave bead screw (8) is embedded in the cam (312), and the steel ball is arranged outside the cam (312) and matched with the positioning groove (321).

7. The deadbolt mechanism of claim 3, wherein, The extension groove comprises a first arc-shaped groove, a second arc-shaped groove and a spring groove from top to bottom. The width of the first arc-shaped groove is greater than that of the second arc-shaped groove, and the first arc-shaped groove is matched with the protrusion (41).

8. A latch mechanism for a door lock according to claim 7, wherein The front surface of the locking block (32) is further fixed with a pressing sheet (6) relative to the spring groove.

9. The deadbolt mechanism of claim 3, wherein, The outer sides of the rotating shaft (4) and the locking block (32) are provided with a cover plate (7), and the lower end of the cover plate (7) is in close contact with the upper end plate surface of the locking block (32).

10. The deadbolt mechanism of claim 9, wherein, The upper end of the cover plate (7) is fixed above the rotating shaft (4), and the lower end is fixed on the limiting column (11).

Images