A latch mechanism for preventing door bolts from prying

Abstract

The present invention relates to the field of safes, and in particular to a bolt locking mechanism for preventing door bolts from prying, comprising a door panel, a door frame and a box body, wherein the door panel is rotatably connected to the box body, the door frame is arranged at the opening of the box body, the door panel is connected to a mounting bracket for transverse sliding, the mounting bracket is fixedly connected to a bolt block, the outer end of the bolt block is rotatably connected to a rotary bolt, an avoidance opening is arranged on the door frame, a driving unit for driving the mounting bracket to slide is provided on the door panel, and a transmission unit for driving the rotary bolt to rotate relative to the bolt block is also provided on the door panel; a driving shaft is rotatably connected to the door panel, a connecting disk is fixedly connected to the driving shaft, the connecting disk is fixedly connected to a second eccentric column, the driving shaft, the connecting disk and the second eccentric column together constitute a driving unit, the mounting bracket and the second eccentric column are connected, and the transmission unit includes a first eccentric column fixedly connected to the connecting disk; the present invention proposes a bolt locking structure for preventing door bolts from prying, which solves the problem that the bolt locking structure on the side of the safe is easily damaged and opened by impact.

Description

Technical Field

[0001] The present invention relates to the field of safes, and in particular to a latch mechanism for preventing door bolts from being pried. Background Art

[0002] Safes are devices used to store valuables, and in recent years, people have increasingly demanded higher levels of security from safes. While innovations have been made based on traditional experience, and a number of effective anti-theft mechanisms have emerged in recent years, including latch-type anti-pry mechanisms, these mechanisms still lack the necessary internal structural features to provide a true anti-pry protection function and offer no protection against side impacts. This is because traditional latches only lock the door frame (the safe) in the forward-backward direction, leaving the door open in the left-right direction. Their security function relies solely on the bending strength of the safe itself. Therefore, impacts applied to the latch from the side of the safe can easily dislodge it. Summary of the Invention

[0003] In order to solve the above problems, the present invention proposes a latch structure for door bolts that is pry-proof, which solves the problem that the latch structure on the side of the safe is easily damaged and opened by impact.

[0004] The technical solution adopted by the present invention is: a bolt lock mechanism for preventing door bolts from prying, comprising a door panel, a door frame and a box body, the door panel being rotatably connected to the box body, the door frame being arranged at the opening of the box body, the door panel being slidably connected to a mounting bracket, the mounting bracket being fixedly connected to a bolt block, the outer end of the bolt block being rotatably connected to a rotary bolt, the door frame being provided with an avoidance opening, the cross-sectional shape of the rotary bolt being adapted to the shape of the avoidance opening, the door panel being provided with a driving unit for driving the mounting bracket to slide, and the door panel being further provided with a transmission unit for driving the rotary bolt to rotate relative to the bolt block;

[0005] The door panel is rotatably connected to a drive shaft, a connecting disk is fixedly connected to the drive shaft, a second eccentric column is fixedly connected to the connecting disk, the drive shaft, the connecting disk and the second eccentric column together constitute the drive unit, the mounting frame is connected to the second eccentric column, the transmission unit includes a first eccentric column, and the first eccentric column is fixedly connected to the connecting disk.

[0006] When the bolt is rotated relative to the bolt block, the portion of the bolt that exceeds the outline of the bolt block is engaged with the door frame portion or the box portion, and the bolt block and the bolt are prevented from retracting and sliding as a whole when the bolt does not rotate relative to the bolt block, thereby increasing the ability of the bolt block and the bolt to withstand the impact and damage in the retraction direction, thereby effectively increasing the anti-theft ability; the rotating drive shaft drives the connecting plate to rotate, and the movement of the transmission unit and the relative movement of the mounting bracket are controlled by the rotation of the first eccentric column and the second eccentric column fixedly connected to the connecting plate. The mounting bracket moving toward the door frame causes the bolt block to move toward the outside of the avoidance opening, and the moving transmission unit causes the bolt to rotate relative to the bolt block. The user can rotate the bolt relative to the bolt block by driving the driving shaft to rotate, so that the transmission mode of the bolt lock mechanism is very fast and the overall structure is more stable.

[0007] Furthermore, an axial hole is provided on the bolt block, a rotating shaft is provided on the rotating bolt, the rotating shaft and the axial hole are rotatably connected, and a side rod extending laterally is provided on the rotating shaft; the transmission unit also includes a connecting frame, a first driving hole and a paddle, the connecting frame is vertically slidably connected to the mounting frame, the connecting frame and the paddle are fixedly connected, and a limiting opening for the side rod to extend into and adapt to is provided on the paddle, the first eccentric column extends into the first driving hole, the first driving hole includes a transverse section and a first circular arc section, and the bottom of the first circular arc section is connected to the transverse section; when the first eccentric column is located in the first circular arc section, the center of the first circular arc section coincides with the rotation center of the first eccentric column.

[0008] Through the above technical solution, when the driving shaft rotates, it drives the first eccentric column to rotate around the driving shaft. The first eccentric column first rotates downward in the first arc segment, the center of the first arc segment and the rotation center of the first eccentric column coincide with each other, the position of the connecting frame remains unchanged, and the cross-sectional profile of the bolt and the cross-sectional profile of the bolt block coincide with each other; after the first eccentric column rotates to the bottom of the first arc segment, the first eccentric column enters the transverse segment and rotates, and begins to drive the connecting frame to slide relative to the door panel, and at the same time, the rotation of the bolt relative to the bolt block is realized by utilizing the cooperation of the limit port and the side rod; the user can realize the rotation of the bolt relative to the bolt block by driving the driving shaft, which is very convenient to use.

[0009] Furthermore, the mounting frame includes a fixedly connected mounting plate and a positioning plate, the positioning plate and the bolt block are fixedly connected, a mounting column is fixedly connected to the door panel, a vertical waist-shaped hole is provided on the connecting frame for the mounting column to extend into, and a limiting plate is fixedly connected to the end of the mounting column, and both sides of the connecting frame are respectively fitted with the limiting plate and the mounting plate.

[0010] Through the above technical solution, the coordinated use of the vertical waist-shaped hole and the mounting column enables the mounting column to limit the connecting frame, and the connecting frame can be reset in time after sliding relative to the mounting frame; the two sides of the connecting frame are respectively fitted with the limiting plate and the mounting plate so that the mounting column is always located in the vertical waist-shaped hole, avoiding separation from each other due to the movement of the connecting frame.

[0011] Furthermore, the mounting frame is provided with a strip-shaped positioning hole for the side rod to extend into, and the strip-shaped positioning hole is vertically arranged; when the side rod is rotated to abut one end of the strip-shaped positioning hole, the cross-sectional profile of the bolt and the cross-sectional profile of the bolt block are intertwined with each other; when the side rod is rotated to abut the other end of the strip-shaped positioning hole, the cross-sectional profile of the bolt and the cross-sectional profile of the bolt block coincide with each other.

[0012] Through the above technical solution, the setting of the strip-shaped positioning hole limits the angular range of rotation of the side rod, and the rotatable angle of the bolt relative to the bolt block is controlled within a relatively reasonable range, avoiding the user from doing useless work and improving the efficiency of controlling the rotation of the bolt relative to the bolt block.

[0013] Furthermore, the mounting plate is provided with a second driving hole for the second eccentric column to extend into, the second driving hole includes a vertical section and a second circular arc section, and the bottom of the vertical section is connected to the second circular arc section; when the second eccentric column is located in the second circular arc section, the center of the second circular arc section coincides with the movement center of the second eccentric column; when the second eccentric column moves to the bottom end of the vertical section, the bolt block extends outward to the limit distance.

[0014] Through the above technical solution, when the driving shaft rotates, it drives the first eccentric column to rotate around the driving shaft, and the second eccentric column first rotates downward in the vertical section on the second driving hole, thereby driving the mounting bracket to slide relative to the door panel, and at the same time utilizes the sliding of the positioning plate to push the bolt block to move to the outside of the avoidance opening; after the second eccentric column rotates to the bottom of the vertical section, the bolt block extends outward to the limit distance, and the second eccentric column begins to enter the second arc section and rotate, and the center of the second arc section coincides with the movement center of the second eccentric column, and the positions of the mounting bracket and the bolt block remain unchanged; the user can achieve the extension of the bolt block by driving the driving shaft, which is very convenient to use.

[0015] Furthermore, a positioning column is fixedly connected to the door panel, and a transverse waist-shaped hole for the positioning column to extend into is provided on the mounting frame. A positioning piece is connected to the end of the positioning column, and the positioning piece is fitted with the mounting plate.

[0016] Through the above technical solution, the cooperation between the transverse waist-shaped hole and the positioning column enables the positioning column to limit the mounting bracket, and the mounting bracket can be reset in time after sliding relative to the door panel to avoid separation due to movement of the mounting bracket.

[0017] Furthermore, an electromagnetic lock is provided on the door panel, and the electromagnetic lock includes a lock head. When the mounting bracket slides outward to a limit distance, the lock head extends out to abut against and lock the mounting bracket.

[0018] Through the above technical solution, the mounting frame can be locked after the lock head is extended, so that the bolt block and the rotary bolt remain in the extended state. If the electromagnetic lock is not unlocked, the rotary bolt and the rotary bolt cannot be retracted, further improving the anti-pry performance.

[0019] Furthermore, the cross-sectional shape of the rotary bolt and the shape of the avoidance opening are both square, rectangular, triangular, diamond, racetrack or elliptical.

[0020] Through the above technical solution, the profile of the bolt is regularly arranged in the circumferential direction, and the portion of the bolt that exceeds the cross-sectional profile of the bolt block is evenly distributed in the circumferential direction, so that the force applied to the bolt during engagement is more uniform.

[0021] Furthermore, a locking bolt is fixedly connected to the positioning plate, and the number of the bolt block and the locking bolt on the positioning plate are both two, and the locking bolt and the bolt block are equidistantly distributed and vertically arranged on the positioning plate; the two bolt blocks are located at the ends of the positioning plate, and the rotary bolt rotates with the sliding of the connecting frame; the two locking bolts are located in the middle of the positioning plate, and the cross-sectional profile of the rotary bolt and the cross-sectional profile of the bolt block always coincide with each other.

[0022] Through the above technical solution, the bolt block and the locking bolt are evenly distributed on the positioning plate and are arranged vertically, so that the bolt block and the locking bolt are subjected to more uniform force when in use. The two bolt blocks at the ends of the positioning plate rotate as the positioning plate slides, so that the user can drive the positioning plate to realize the rotation of the bolt relative to the bolt block, which is very convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of a portion of the structure of the present invention when the bolt block and the rotary bolt are unlocked;

[0026] Figure 3 The second schematic diagram of the partial structure of the present invention is shown in the unlocked state of the bolt block and the rotary bolt;

[0027] Figure 4 This is a partial structural diagram of the present invention with the bolt block and the rotary bolt locked;

[0028] Figure 5 The second schematic diagram of the partial structure of the present invention with the bolt block and the rotary bolt locked;

[0029] Figure 6 The third schematic diagram of the partial structure of the present invention with the bolt block and the rotary bolt locked;

[0030] Figure 7 It is an exploded view of part of the structure of the present invention;

[0031] Figure 8 This is a schematic diagram of the door frame structure of the present invention;

[0032] Figure 9 This is a schematic structural diagram of the connecting frame of the present invention;

[0033] Figure 10 It is a schematic diagram of the mounting frame structure of the present invention;

[0034] The invention number information is as follows:

[0035] 1. Door panel; 2. Door frame; 3. Box body; 4. Mounting bracket; 401. Mounting plate; 402. Positioning plate; 5. Bolt block; 6. Rotary bolt; 7. Avoidance opening; 8. Drive shaft; 9. Connecting plate; 10. First eccentric column; 11. Second eccentric column; 12. Axis hole; 13. Rotating shaft; 14. Side rod; 15. Connecting bracket; 16. First drive hole; 161. Horizontal section; 162. First arc section; 17. Paddle; 18. Limiting opening; 19. Mounting column; 20. Vertical waist-shaped hole; 21. Limiting plate; 22. Strip-shaped positioning hole; 23. Second drive hole; 231. Vertical section; 232. Second arc section; 24. Positioning column; 25. Horizontal waist-shaped hole; 26. Positioning plate; 27. Electromagnetic lock; 271. Lock head; 28. Lock bolt; 29. ​​Knob

[0036] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, the descriptions of "first", "second", etc. in the present invention are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0040] See Figures 1 to 10 As shown, a bolt locking mechanism for preventing door bolts from prying includes a door panel 1, a door frame 2 and a box body 3. The door panel 1 is rotatably connected to the box body 3, and the door frame 2 is arranged at the opening of the box body 3. The door panel 1 is laterally slidably connected to a mounting bracket 4, and a bolt block 5 is fixedly connected to the mounting bracket 4. The outer end of the bolt block 5 is rotatably connected to a bolt 6, and an avoidance opening 7 is provided on the door frame 2. The cross-sectional shape of the bolt 6 is adapted to the shape of the avoidance opening 7. A driving unit for driving the mounting bracket 4 to slide is provided on the door panel 1, and a transmission unit for driving the bolt 6 to rotate relative to the bolt block 5 is also provided on the door panel 1; a driving shaft 8 is rotatably connected to the door panel 1, and a connecting disk 9 is fixedly connected to the driving shaft 8. The connecting disk 9 is fixedly connected to a second eccentric column 11. The driving shaft 8, the connecting disk 9 and the second eccentric column 11 together constitute a driving unit. The mounting bracket 4 and the second eccentric column 11 are connected, and the transmission unit includes a first eccentric column 10, and the first eccentric column 10 and the connecting disk 9 are fixedly connected. When the bolt 6 is rotated relative to the bolt block 5, the portion of the bolt 6 that exceeds the outline of the bolt block 5 is engaged with the door frame 2 or the box body 3. When the bolt 6 does not rotate relative to the bolt block 5, the bolt block 5 and the bolt 6 can be prevented from retracting and sliding as a whole, thereby increasing the ability of the bolt block 5 and the bolt 6 to withstand the impact damage in the retraction direction, thereby effectively increasing the anti-theft ability; the rotating drive shaft 8 drives the connecting plate 9 to rotate, and the rotation of the first eccentric column 10 and the second eccentric column 11 fixedly connected to the connecting plate 9 controls the movement of the transmission unit and the relative movement of the mounting bracket 4. The mounting bracket 4 moving toward the door frame 2 causes the bolt block 5 to move toward the outside of the avoidance opening 7, and the moving transmission unit causes the bolt 6 to rotate relative to the bolt block 5. The user can rotate the bolt 6 relative to the bolt block 5 by driving the driving shaft 8 to rotate, so that the transmission mode of the latch mechanism is very fast and the overall structure is more stable.

[0041] Preferably, a knob 29 is fixedly connected to the drive shaft 8 , and the knob 29 and the connecting plate 9 are respectively located on both sides of the door panel 1 .

[0042] Preferably, the distance between the first eccentric column 10 and the drive shaft 8 is the same as the distance between the second eccentric column 11 and the drive shaft 8 .

[0043] Preferably, there are four avoidance openings 7 on the door frame 2 .

[0044] See Figure 2 、 3 As shown in , 4, 5, 6, 7, and 9, an axial hole 12 is provided on the bolt block 5, and a rotating shaft 13 is provided on the bolt 6. The rotating shaft 13 and the axial hole 12 are rotatably connected, and a side rod 14 extending laterally is provided on the rotating shaft 13; the transmission unit also includes a connecting frame 15, a first driving hole 16 and a paddle 17. The connecting frame 15 is vertically slidably connected to the mounting frame 4, and the connecting frame 15 and the paddle 17 are fixedly connected. A limiting opening 18 for the side rod 14 to extend into and adapt to is provided on the paddle 17. The first eccentric column 10 extends into the first driving hole 16. The first driving hole 16 includes a transverse section 161 and a first circular arc section 162. The bottom of the first circular arc section 162 is connected to the transverse section 161; when the first eccentric column 10 is located in the first circular arc section 162, the center of the first circular arc section 162 coincides with the rotation center of the first eccentric column 10. When the drive shaft 8 rotates, it drives the first eccentric column 10 to rotate around the drive shaft 8. The first eccentric column 10 first rotates downward in the first arc segment 162. The center of the first arc segment 162 coincides with the rotation center of the first eccentric column 10. The position of the connecting frame 15 remains unchanged. The cross-sectional profile of the bolt 6 and the cross-sectional profile of the bolt block 5 coincide with each other. After the first eccentric column 10 rotates to the bottom of the first arc segment 162, the first eccentric column 10 enters the transverse section 161 and rotates, and begins to drive the connecting frame 15 to slide relative to the door panel 1. At the same time, the rotation of the bolt 6 relative to the bolt block 5 is achieved by utilizing the cooperation of the limit opening 18 and the side rod 14. The user can realize the rotation of the bolt 6 relative to the bolt block 5 by driving the drive shaft 8, which is very convenient to use.

[0045] Preferably, the length direction of the side rod 14 is perpendicular to the axial direction of the rotating shaft 13 to improve the efficiency of the side rod 14 in driving the rotating shaft 13 to rotate.

[0046] See Figure 2 、 3As shown in Figures 4, 5, 6, 9, and 10, the mounting frame 4 includes a fixedly connected mounting plate 401 and a positioning plate 402. The positioning plate 402 is fixedly connected to the bolt block 5. A mounting post 19 is fixedly connected to the door panel 1. A vertical waist-shaped hole 20 for the mounting post 19 to extend into is provided on the connecting frame 15. The end of the mounting post 19 is fixedly connected to a limiting piece 21. Both sides of the connecting frame 15 are respectively fitted with the limiting piece 21 and the mounting plate 401. The coordinated use of the vertical waist-shaped hole 20 and the mounting post 19 allows the mounting post 19 to limit the connecting frame 15, and the connecting frame 15 can be reset in time after sliding relative to the mounting frame 4; the two sides of the connecting frame 15 are respectively fitted with the limiting piece 21 and the mounting plate 401 so that the mounting post 19 is always located in the vertical waist-shaped hole 20, avoiding separation due to the movement of the connecting frame 15.

[0047] See Figure 2 、 3 As shown in Figures 5, 6, and 10, the mounting frame 4 is provided with a strip-shaped positioning hole 22 for the side rod 14 to extend into. The strip-shaped positioning hole 22 is arranged vertically. When the side rod 14 is rotated to abut one end of the strip-shaped positioning hole 22, the cross-sectional profile of the bolt 6 and the cross-sectional profile of the bolt block 5 intersect with each other; when the side rod 14 is rotated to abut the other end of the strip-shaped positioning hole 22, the cross-sectional profile of the bolt 6 and the cross-sectional profile of the bolt block 5 overlap with each other. The provision of the strip-shaped positioning hole 22 limits the angular range of rotation of the side rod 14, controlling the rotatable angle of the bolt 6 relative to the bolt block 5 within a relatively reasonable range, avoiding unnecessary work by the user and improving the efficiency of controlling the rotation of the bolt 6 relative to the bolt block 5.

[0048] Preferably, the number of the rotary bolt 6 , the number of the side rods 14 , the number of the rotating shaft 13 and the strip-shaped positioning hole 22 are two, and all the side rods 14 are inserted into the corresponding strip-shaped positioning holes 22 .

[0049] Preferably, when the side rod 14 abuts the bottom end of the strip-shaped positioning hole 22, the cross-sectional profile of the bolt 6 and the cross-sectional profile of the bolt block 5 are intertwined; preferably, when the side rod 14 abuts the top end of the strip-shaped positioning hole 22, the cross-sectional profile of the bolt 6 and the cross-sectional profile of the bolt block 5 coincide with each other.

[0050] The description herein that the cross-sectional profiles of the bolt 6 and the bolt block 5 are interlaced specifically means that the cross-sectional profiles of the bolt 6 partially overlap with the cross-sectional profiles of the bolt block 5 and a portion of the cross-sectional profile of the bolt 6 exceeds the cross-sectional profile range of the bolt block 5 .

[0051] See Figure 2 、 3As shown in Figures 4, 5, 6 and 10, a second driving hole 23 for the second eccentric column 11 to extend into is provided on the mounting plate 401, and the second driving hole 23 includes a vertical section 231 and a second arc section 232, and the bottom of the vertical section 231 is connected to the second arc section 232; when the second eccentric column 11 is located in the second arc section 232, the center of the second arc section 232 coincides with the movement center of the second eccentric column 11; when the second eccentric column 11 moves to the bottom end of the vertical section 231, the bolt block 5 extends outward to the limit distance. When the driving shaft 8 rotates, it drives the first eccentric column 10 to rotate around the driving shaft 8, and the second eccentric column 11 first rotates downward in the vertical section 231 on the second driving hole 23, thereby driving the mounting bracket 4 to slide relative to the door panel 1, and at the same time uses the sliding of the positioning plate 402 to push the bolt block 5 to move to the outside of the avoidance opening 7; after the second eccentric column 11 rotates to the bottom of the vertical section 231, the bolt block 5 extends outward to the limit distance, and the second eccentric column 11 begins to enter the second arc section 232 and rotate. The center of the second arc section 232 coincides with the movement center of the second eccentric column 11, and the positions of the mounting bracket 4 and the bolt block 5 remain unchanged; the user can drive the driving shaft 8 to achieve the extension of the bolt block 5, which is very convenient to use.

[0052] See Figure 2 、 3 As shown in Figures 4, 5, 6, and 10, a positioning post 24 is fixedly connected to the door panel 1, and a transverse waist-shaped hole 25 is provided on the mounting frame 4 for the positioning post 24 to extend into. A positioning piece 26 is connected to the end of the positioning post 24, and the positioning piece 26 is in contact with the mounting plate 401. The cooperation between the transverse waist-shaped hole 25 and the positioning post 24 allows the positioning post 24 to limit the position of the mounting frame 4, so that the mounting frame 4 can be promptly reset after sliding relative to the door panel 1, preventing separation due to the movement of the mounting frame 4.

[0053] See Figures 2 to 6 As shown, the door panel 1 is provided with an electromagnetic lock 27, which includes a lock head 271. When the mounting bracket 4 slides outward to the limit, the lock head 271 extends to abut and lock the mounting bracket 4. The extension of the lock head 271 locks the mounting bracket 4, so that the bolt block 5 and the rotary bolt 6 remain extended. Without unlocking the electromagnetic lock 27, the rotary bolt 6 and the rotary bolt 6 cannot be retracted, further improving the anti-pry performance.

[0054] See Figures 2 to 6 As shown, the cross-sectional shape of the bolt 6 and the shape of the escape opening 7 are both square, rectangular, triangular, rhombus, racetrack-shaped, or elliptical. This allows the profile of the bolt 6 to be regularly arranged in the circumferential direction, and the portion of the bolt 6 that extends beyond the cross-sectional profile of the bolt block 5 is evenly distributed in the circumferential direction, thereby ensuring a more uniform force applied to the bolt 6 during engagement.

[0055] See Figures 2 to 6As shown, a locking bolt 28 is fixedly connected to the positioning plate 402. There are two bolt blocks 5 and two locking bolts 28 on the positioning plate 402. The locking bolts 28 and bolt blocks 5 are equidistantly spaced and vertically arranged on the positioning plate 402. The two bolt blocks 5 are located at the ends of the positioning plate 402, and the rotating bolt 6 rotates as the connecting frame 15 slides. The two locking bolts 28 are located in the middle of the positioning plate 402, and the cross-sectional profiles of the rotating bolt 6 and the cross-sectional profiles of the bolt blocks 5 always coincide. The equidistant distribution of the bolt blocks 5 and the vertical arrangement of the locking bolt 28 on the positioning plate 402 ensures more uniform force on the bolt blocks 5 and the locking bolt 28 during use. The two bolt blocks 5 at the ends of the positioning plate 402 rotate as the positioning plate 402 slides, allowing the user to rotate the rotating bolt 6 relative to the bolt blocks 5 by driving the positioning plate 402, making it very convenient to use.

[0056] Preferably, the cross-sectional profiles of the locking bolt 28 , the bolt block 5 , the rotary bolt 6 , and the shape of the escape opening 7 are all square.

[0057] See also Figures 1 to 10 After the door panel 1 is closed on the opening of the box body 3, the knob 29 is rotated to drive the drive shaft 8 to rotate. The second eccentric column 11 moves downward relative to the vertical section 231 of the second drive hole 23. At the same time, the second eccentric column 11 drives the mounting frame 4 to slide outward, and the first eccentric column 10 rotates downward in the first arc section 162 of the first drive hole 16. At this time, the position of the connecting frame 15 remains unchanged, the bolt 6 does not rotate relative to the bolt block 5, and the bolt 6 and the bolt block 5 extend out of the avoidance opening 7 in sequence.

[0058] When the second eccentric column 11 moves into the second arc segment 232, the bolt 6 and the bolt block 5 are completely extended out of the avoidance opening 7, and the knob 29 is continued to be rotated. The second eccentric column 11 rotates in the second arc segment 232. At this time, the overall position of the mounting bracket 4 remains unchanged; when the first eccentric column 10 rotates into the transverse section 161, the first eccentric column 10 is downward relative to the transverse section 161 of the first driving hole 16, and the first eccentric column 10 drives the connecting frame 15 to slide to the left. At this time, the connecting frame 15 slides to the left and slides downward relative to the mounting bracket 4 as a whole. The paddle 17 moves with the movement of the connecting frame 15, driving the side rod 14 to rotate downward, so that the bolt 6 rotates relative to the bolt block 5. When the side rod 14 abuts the bottom end of the strip positioning hole 22, the contours of the bolt block 5 and the bolt 6 are intertwined.

[0059] The present invention can be combined with a mechanical lock or an electronic lock to control the rotation of the drive shaft 8, so that when the mechanical lock or electronic lock connected to the drive shaft 8 is in a locked state, the part of the bolt 6 that exceeds the outline of the bolt block 5 is kept in a state of being engaged with the box body 3 or the door frame 2, thereby greatly increasing the security of the safe.

[0060] The mounting bracket 4 is designed together with a mechanical lock or an electronic lock. When the side rod 14 abuts against the bottom end of the strip positioning hole 22, the drive shaft 8 can be twisted to unlock the lateral displacement of the mounting bracket 4 only after the mechanical lock or the electronic lock is unlocked.

[0061] The lock head 271 extends outward to abut the mounting frame 4 to lock the mounting frame 4 that has moved outward to the limit. The retraction and extension of the lock head 271 are controlled by the password lock. Only by entering the correct password can the electromagnetic lock 27 be unlocked, thereby unlocking the bolt block 5 and the rotary bolt 6, further increasing the safety of use.

[0062] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A latch mechanism for preventing door bolts from being pried open, comprising a door panel (1), a door frame (2) and a housing (3), characterized in that: The door panel (1) is rotatably connected to the box body (3), the door frame (2) is arranged at the opening of the box body (3), the door panel (1) is slidably connected to a mounting bracket (4), the mounting bracket (4) is fixedly connected to a bolt block (5), the outer end of the bolt block (5) is rotatably connected to a rotary bolt (6), the door frame (2) is provided with an avoidance opening (7), the cross-sectional shape of the rotary bolt (6) is adapted to the shape of the avoidance opening (7), the door panel (1) is provided with a driving unit for driving the mounting bracket (4) to slide, and the door panel (1) is also provided with a transmission unit for driving the rotary bolt (6) to rotate relative to the bolt block (5); The door panel (1) is rotatably connected to a drive shaft (8), a connecting disk (9) is fixedly connected to the drive shaft (8), and a second eccentric column (11) is fixedly connected to the connecting disk (9). The drive shaft (8), the connecting disk (9) and the second eccentric column (11) together constitute the drive unit. The mounting frame (4) is connected to the second eccentric column (11). The transmission unit includes a first eccentric column (10), and the first eccentric column (10) is fixedly connected to the connecting disk (9); an axial hole (12) is provided on the bolt block (5). The bolt (6) is provided with a rotating shaft (13), the rotating shaft (13) and the shaft hole (12) are rotatably connected, and a side rod (14) extending laterally is provided on the rotating shaft (13); the transmission unit further comprises a connecting frame (15), a first driving hole (16) and a paddle (17), the connecting frame (15) is vertically slidably connected to the mounting frame (4), the connecting frame (15) and the paddle (17) are fixedly connected, and a limiting opening (18) for the side rod (14) to extend into and fit into is provided on the paddle (17), and the first eccentric column (10) The first driving hole (16) extends into the first driving hole (16), the first driving hole (16) includes a transverse section (161) and a first arc section (162), the bottom of the first arc section (162) is connected to the transverse section (161); when the first eccentric column (10) is located in the first arc section (162), the center of the first arc section (162) and the rotation center of the first eccentric column (10) coincide with each other; the mounting frame (4) includes a mounting plate (401) and a positioning plate (402) that are fixedly connected, and the mounting plate (401) is provided with a The second eccentric column (11) extends into the second driving hole (23), the second driving hole (23) includes a vertical section (231) and a second arc section (232), the bottom of the vertical section (231) is connected to the second arc section (232); when the second eccentric column (11) is located in the second arc section (232), the center of the second arc section (232) and the movement center of the second eccentric column (11) coincide with each other; when the second eccentric column (11) moves to the bottom end of the vertical section (231), the bolt block (5) extends outward to a maximum distance.

2. The latch mechanism for preventing door bolts from prying according to claim 1, characterized in that: The positioning plate (402) and the bolt block (5) are fixedly connected, a mounting column (19) is fixedly connected to the door panel (1), a vertical waist-shaped hole (20) for the mounting column (19) to extend into is provided on the connecting frame (15), the end of the mounting column (19) is fixedly connected to a limiting plate (21), and both sides of the connecting frame (15) are respectively fitted with the limiting plate (21) and the mounting plate (401).

3. The latch mechanism for preventing door bolts from prying according to claim 2, characterized in that: The mounting frame (4) is provided with a strip-shaped positioning hole (22) for the side rod (14) to extend into, and the strip-shaped positioning hole (22) is arranged vertically; when the side rod (14) is rotated to abut one end of the strip-shaped positioning hole (22), the cross-sectional profile of the rotary bolt (6) and the cross-sectional profile of the bolt block (5) are intertwined with each other; when the side rod (14) is rotated to abut the other end of the strip-shaped positioning hole (22), the cross-sectional profile of the rotary bolt (6) and the cross-sectional profile of the bolt block (5) are overlapped with each other.

4. The latch mechanism for preventing door bolts from prying according to claim 3, characterized in that: A positioning column (24) is fixedly connected to the door panel (1), a transverse waist-shaped hole (25) for the positioning column (24) to extend into is provided on the mounting frame (4), a positioning piece (26) is connected to the end of the positioning column (24), and the positioning piece (26) is fitted to the mounting plate (401).

5. The latch mechanism for preventing door bolts from prying according to claim 1, 2, 3 or 4, characterized in that: An electromagnetic lock (27) is provided on the door panel (1), and the electromagnetic lock (27) includes a lock head (271). When the mounting frame (4) slides outward to a limit distance, the lock head (271) extends to abut against and lock the mounting frame (4).

6. The latch mechanism for preventing door bolts from prying according to claim 5, characterized in that: The cross-sectional shape of the rotary bolt (6) and the shape of the avoidance opening (7) are both square, rectangular, triangular, rhombus, racetrack or elliptical.

7. The latch mechanism for preventing door bolts from prying according to claim 6, characterized in that: A locking bolt (28) is fixedly connected to the positioning plate (402), and the number of the bolt block (5) and the locking bolt (28) on the positioning plate (402) is two, and the locking bolt (28) and the bolt block (5) are equidistantly distributed and vertically arranged on the positioning plate (402); the two bolt blocks (5) are located at the ends of the positioning plate (402), and the rotating bolt (6) rotates with the sliding of the connecting frame (15); the two locking bolts (28) are located in the middle of the positioning plate (402), and the cross-sectional profile of the rotating bolt (6) and the cross-sectional profile of the bolt block (5) always coincide with each other.

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