Turnover type latch bolt lock body with anti-insertion function

Abstract

The utility model provides an overturning type latch bolt lock body with an anti-insertion function. The overturning type latch bolt lock body comprises a lock body shell, an overturning bolt assembly, a clutch assembly, a clutch driving assembly and a shifting wheel, wherein the overturning bolt assembly, the clutch assembly, the clutch driving assembly and the shifting wheel are installed in the lock body shell. A spring bolt side plate is arranged on one side face of the lock body shell, and a spring bolt mounting hole for the overturning bolt assembly to stretch out is formed in the spring bolt side plate. The overturning tongue assembly comprises an overturning tongue, an overturning tongue push block and an overturning tongue reset spring. The clutch assembly comprises a separation plate and a separation plate reset spring. The shifting wheel is in transmission connection with the separating plate through a clutch driving assembly and used for driving the separating plate to move up and down in the vertical direction through the clutch driving assembly so as to control the limiting effect of the separating plate on the overturning tongue. The turnover type latch bolt lock body with the anti-insertion function has the anti-insertion and anti-theft functions, and the safety of the turnover type latch bolt lock body is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of lock bodies, in particular to a flip-type oblique bolt lock body with an anti-insertion function. Background Art

[0002] In existing electronic door locks, a latch bolt assembly is provided. The latch bolt assembly of some electronic door locks is a flip latch bolt assembly. The flip latch bolt assembly has a flippable latch bolt. When the door body is in a closed state, the flip latch bolt is inserted into a lock slot on the door frame. When the door body is pushed to open the door, a side wall of the lock slot contacts and pushes the flip latch bolt to flip, so that a surface of the flip latch bolt in contact with a side wall of the lock slot becomes an inclined surface inclined relative to a side wall of the lock slot, and then a side wall of the lock slot can push the flip latch bolt to retract into the lock shell, thereby opening the door.

[0003] However, there is still room for improvement in this type of flip latch bolt. Since the flip latch bolt can be retracted into the lock body by simply applying pressure to it, even when the door is closed, an object can be inserted into the gap between the door and the door frame to apply pressure to the latch bolt, thereby opening the door by abnormal means, posing a safety hazard to the property inside the room. Utility Model Content

[0004] In view of this, it is necessary to provide a flip-type inclined tongue lock body with an anti-insertion function to address the problems existing in the prior art, thereby improving the anti-insertion and anti-theft performance of the lock body and improving the safety of the lock body.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A flip-type oblique tongue lock body with an anti-insertion function comprises a lock body shell, and a flip tongue assembly, a clutch assembly, a clutch drive assembly and a dial wheel installed in the lock body shell;

[0007] A lock tongue side plate is provided on one side of the lock body shell, and a lock tongue mounting hole is provided on the lock tongue side plate for the flip tongue assembly to extend out;

[0008] The flip tongue assembly comprises a flip tongue, a flip tongue push block and a flip tongue return spring;

[0009] The flip tongue is installed in the lock tongue mounting hole of the lock tongue side plate, and the outer end of the flip tongue has a first inclined surface and a second inclined surface parallel to the vertical direction, and the first inclined surface and the second inclined surface intersect at an acute angle, so that the outer end of the flip tongue is wedge-shaped as a whole; the inner end of the flip tongue has an arc-shaped cylindrical surface; the upper and lower sides of the inner end of the flip tongue are provided with protruding limiting bosses, and the limiting bosses make the height of the inner end of the flip tongue greater than the height of the lock tongue mounting hole, so as to limit the inner end of the flip tongue in the lock body shell, so that only the outer end of the flip tongue can extend from the lock tongue mounting hole; wherein, a clutch groove is provided on the lower limiting boss, and the clutch groove passes through the limiting boss in a direction parallel to the first inclined surface;

[0010] The flip tongue push block is slidably connected to the lock body shell in a direction perpendicular to the lock tongue side plate, the outer end of the flip tongue push block abuts against the arc-shaped cylindrical surface of the flip tongue, and the inner end of the flip tongue push block is elastically connected to the lock body shell through a flip tongue reset spring, so that the flip tongue can be elastically and telescopically installed in the lock tongue mounting hole; the outer end of the flip tongue push block has an arc-shaped connecting groove, and the arc-shaped connecting groove matches the arc-shaped cylindrical surface of the inner end of the flip tongue, so that the flip tongue and the flip tongue push block have the freedom of relative rotation along the vertical axis;

[0011] The clutch assembly comprises a separation plate and a separation plate return spring; the upper part of the separation plate passes through the flip tongue push block in the vertical direction, so that the separation plate can slide in the flip tongue push block in the vertical direction, and the lower part of the separation plate is provided with a plug-in portion matching the clutch groove of the flip tongue; the separation plate return spring is elastically connected between the separation plate and the flip tongue push block, and is used to provide elastic potential energy for the separation plate to move upward, so that the separation plate is maintained at the maximum stroke of the upward movement when not subjected to external force; when the separation plate is at the maximum stroke of the upward movement, the plug-in portion of the separation plate is inserted into the clutch groove of the flip tongue, so that the flip tongue loses the freedom to rotate around the vertical axis; when the separation plate is at the maximum stroke of the downward movement, the plug-in portion of the separation plate is disengaged from the clutch groove of the flip tongue, so that the flip tongue obtains the freedom to rotate around the vertical axis;

[0012] The dial wheel is transmission-connected to the separation plate through a clutch drive assembly, and is used to drive the separation plate to move up and down in a vertical direction through the clutch drive assembly, so as to control the limiting effect of the separation plate on the flip tongue.

[0013] Furthermore, it also includes an unlocking motor, which is transmission-connected to the dial wheel and is used to drive the dial wheel to rotate forward or reverse.

[0014] Furthermore, a door opening and closing detection assembly is also installed in the lock body shell above the flip tongue and the clutch assembly; the door opening and closing detection assembly includes a detection tongue, a detection tongue reset spring, a sliding control plate and a micro-motion detection switch; the detection tongue is elastically connected to the lock body shell through the detection tongue reset spring, so that the detection tongue elastically extends from the side of the lock body shell; the outer end of the detection tongue is in an arc shape, one end of the sliding control plate is fixedly connected to the inner end of the detection tongue, and the other end of the sliding control plate is arranged below the micro-motion detection switch;

[0015] When the detection tongue is retracted into the lock body shell, the other end of the sliding control plate moves inward to the switch part that triggers the micro-motion detection switch; when the detection tongue is extended out of the lock body shell, the other end of the sliding control plate moves outward to the switch part that releases the micro-motion detection switch; the micro-motion detection switch is connected to the unlocking motor through the control circuit.

[0016] Further, the clutch drive assembly includes a release shift ring, a transmission plate and a release shift fork;

[0017] The separation dial ring is fixed on the dial wheel and is connected to rotate synchronously with the dial wheel. The separation dial ring has a radially protruding dial portion.

[0018] The middle part of the transmission plate is rotatably connected to the inner wall of the lock body shell through a first fixed shaft, one end of the transmission plate is provided with a toggle column, and the other end of the transmission plate is provided with a transmission slide groove;

[0019] A transmission connection column is provided at one end of the separation fork, and a hook portion is provided at the other end of the separation fork, and the bending portion of the hook portion is rotatably connected to the inner wall of the lock body shell through a second fixed shaft; a separation toggle column is provided at the lower part of the separation plate, and the separation toggle column is arranged in the hook portion of the separation fork;

[0020] The toggle part on the separation shift ring is transmission-connected to the toggle post at one end of the transmission plate, and the transmission connection post at one end of the separation shift fork is slidably connected to the transmission slide groove at the other end of the transmission plate, so that the transmission plate is transmission-connected to the separation shift fork;

[0021] When the paddle wheel rotates forward, the separation fork is driven to rotate through the separation shift ring and the transmission plate in turn, and the hook portion of the separation fork hooks the separation shift column at the lower part of the separation plate downward, so that the separation plate is disengaged from the clutch groove of the flip tongue.

[0022] Furthermore, a first reset torsion spring is arranged on the dial wheel, and the first reset torsion spring is connected to the separation dial ring and is used to reset the separation dial ring.

[0023] Furthermore, a second reset torsion spring is arranged on the first fixed shaft, and the second reset torsion spring is connected to the transmission plate and is used for resetting the transmission plate.

[0024] Furthermore, a clutch groove is also provided on the limiting boss located at the lower side of the flip tongue, and the clutch groove passes through the limiting boss along a direction parallel to the first inclined surface.

[0025] The utility model provides a flip-type oblique bolt lock body with anti-insertion function, which has anti-insertion and anti-theft functions, greatly improving the safety of the flip-type oblique bolt lock body. At the same time, the transmission structure of the clutch assembly inside the lock body is more scientific, which reduces the force when the motor drives the switch lock, reduces the unlocking power consumption of the lock body, and greatly improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of a flip-type latch bolt lock body with an anti-insertion function provided by an embodiment of the utility model;

[0027] Figure 2 It is a structural schematic diagram of a flip tongue assembly and a clutch assembly in an embodiment of the utility model;

[0028] Figure 3 It is a structural exploded view of the flip tongue assembly and the clutch assembly in the embodiment of the utility model;

[0029] Figure 4 It is a plan view of a flip-type latch bolt lock body with an anti-insertion function provided by an embodiment of the utility model in an unlocked state;

[0030] Figure 5 The utility model is provided in an embodiment of a plan view of a flip-type inclined bolt lock body with an anti-insertion function in a locked state. DETAILED DESCRIPTION

[0031] The technical solution of the utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] like Figures 1 to 5 As shown, the embodiment of the utility model provides a flip-type oblique tongue lock body with an anti-insertion function, comprising a lock body shell 1, and a flip tongue assembly 2, a clutch assembly 3, a clutch drive assembly 4 and a dial wheel 5 installed in the lock body shell 1;

[0033] A lock tongue side plate 10 is disposed on one side of the lock body housing 1 , and a lock tongue mounting hole is disposed on the lock tongue side plate 10 for the flip tongue assembly 2 to extend out.

[0034] Combination Figure 2 and Figure 3 As shown, the flip tongue assembly 2 includes a flip tongue 21, a flip tongue push block 22 and a flip tongue return spring 23;

[0035] The flip tongue 21 is installed in the lock tongue mounting hole of the lock tongue side plate 10, and the outer end of the flip tongue 21 has a first inclined surface and a second inclined surface parallel to the vertical direction, and the first inclined surface and the second inclined surface intersect at an acute angle, so that the outer end of the flip tongue 21 is wedge-shaped as a whole; the inner end of the flip tongue 21 has an arc-shaped cylinder; the upper and lower sides of the inner end of the flip tongue 21 are provided with protruding limiting bosses 211, and the limiting bosses 211 make the height of the inner end of the flip tongue 21 greater than the height of the lock tongue mounting hole, so as to limit the inner end of the flip tongue 21 in the lock body shell 1, so that only the outer end of the flip tongue 21 can extend from the lock tongue mounting hole; wherein, a clutch groove 210 is provided on the limiting boss 211 located on the lower side, and the clutch groove 210 passes through the limiting boss 211 in a direction parallel to the first inclined surface;

[0036] The flip tongue push block 22 is slidably connected to the lock body shell 1 in a direction perpendicular to the lock tongue side plate 10. Specifically, protruding ear seats are respectively provided on both sides of the flip tongue push block 22, and the flip tongue push block 22 is slidably limited and connected to the lock body shell 1 through the protruding ear seats. Furthermore, the outer end of the flip tongue push block 22 abuts against the arc-shaped cylindrical surface of the flip tongue 21, and the inner end of the flip tongue push block 22 is elastically connected to the lock body shell 1 through the flip tongue return spring 23, so that the flip tongue 21 can be elastically and telescopically installed in the lock tongue mounting hole; the outer end of the flip tongue push block 22 has an arc-shaped connecting groove, and the arc-shaped connecting groove matches the arc-shaped cylindrical surface of the inner end of the flip tongue 21, so that the flip tongue 21 and the flip tongue push block 22 have the freedom of relative rotation along the vertical axis;

[0037] The clutch assembly 3 includes a separation plate 31 and a separation plate return spring 32; the upper portion of the separation plate 31 passes through the flip tongue push block 22 in the vertical direction, so that the separation plate 31 can slide in the flip tongue push block 22 in the vertical direction, and the lower portion of the separation plate 31 is provided with a plug-in portion matching the clutch groove 210 of the flip tongue 21; the separation plate return spring 32 is elastically connected between the separation plate 31 and the flip tongue push block 22, and is used to provide elastic potential energy for upward movement to the separation plate 31, so that the separation plate 31 is maintained at the maximum stroke of upward movement when not subjected to external force; when the separation plate 31 is located at the maximum stroke of upward movement, the plug-in portion of the separation plate 31 is inserted into the clutch groove 210 of the flip tongue 21, so that the flip tongue 21 loses the degree of freedom to rotate around the vertical axis; when the separation plate 31 is located at the maximum stroke of downward movement, the plug-in portion of the separation plate 31 is disengaged from the clutch groove 210 of the flip tongue 21, so that the flip tongue 21 obtains the degree of freedom to rotate around the vertical axis;

[0038] The dial wheel 5 is transmission-connected to the separation plate 31 via the clutch drive assembly 4 , and is used to drive the separation plate 31 to move up and down in the vertical direction via the clutch drive assembly 4 , so as to control the limiting effect of the separation plate 31 on the flip tongue 21 .

[0039] Furthermore, the clutch drive assembly 4 includes a release shift ring 41, a transmission plate 42 and a release shift fork 43;

[0040] The separation dial ring 41 is fixed on the dial wheel 5 and is connected to rotate synchronously with the dial wheel 5. The separation dial ring 41 has a radially protruding dial portion.

[0041] The middle part of the transmission plate 42 is rotatably connected to the inner wall of the lock body shell 1 through the first fixed shaft 71, and a toggle column 421 is provided at one end of the transmission plate 42, and a transmission slide groove 422 is provided at the other end of the transmission plate 42;

[0042] A transmission connection column 431 is provided at one end of the separation fork 43, and a hook portion 432 is provided at the other end of the separation fork 43, and the bending portion of the hook portion 432 is rotatably connected to the inner wall of the lock body shell 1 through the second fixed shaft 72; a separation toggle column 310 is provided at the lower part of the separation plate 31, and the separation toggle column 310 is arranged in the hook portion 432 of the separation fork 43;

[0043] The toggle portion on the separation toggle ring 41 is transmission-connected to the toggle column 421 at one end of the transmission plate 42, and the transmission connection column 431 at one end of the separation fork 43 is slidably connected to the transmission slide groove 422 at the other end of the transmission plate 42, so that the transmission plate 42 is transmission-connected to the separation fork 43;

[0044] When the dial wheel 5 rotates forward, the separation fork 43 is driven to rotate through the separation ring 41 and the transmission plate 42 in turn, and the hook portion 432 of the separation fork 43 hooks the separation activation column 310 at the lower part of the separation plate 31 downward, so that the separation plate 31 is disengaged from the clutch groove 210 of the flip tongue 21.

[0045] Furthermore, the dial wheel 5 is provided with a first reset torsion spring 81, which is connected to the separation dial ring 41 and used to reset the separation dial ring 41. The first fixed shaft 71 is provided with a second reset torsion spring 82, which is connected to the transmission plate 42 and used to reset the transmission plate 42.

[0046] When the dial 5 rotates in the opposite direction, the separation ring 41 is reset together with the dial 5 under the action of the first reset torsion spring 81, and the transmission plate 42 is reset under the action of the second reset torsion spring 82. At the same time, the transmission slide groove 422 on the transmission plate 42 resets the separation fork 43 through the transmission connecting column 431 on the separation fork 43. Finally, the separation plate 31 is reset upward under the action of the separation plate reset spring 32 and reinserted into the clutch groove 210 of the flip tongue 21.

[0047] As an improvement, a clutch groove 210 is also provided on the limiting boss 211 located at the lower side of the flip tongue 21, and the clutch groove 210 passes through the limiting boss 211 in a direction parallel to the first inclined surface. Based on this design, since the limiting bosses 211 on the upper and lower sides of the flip tongue 21 are both provided with clutch grooves 210, the flip tongue 21 can flexibly adapt to different door opening directions when installed and used. During installation, the opposite door opening direction can be achieved by simply switching the installation direction of the flip tongue 21 up and down.

[0048] The clutch assembly of the flip-type oblique tongue lock body of the utility model embodiment has a high transmission efficiency and is suitable for being made into an electronic smart lock. Specifically, when applied to an electronic smart lock, the flip-type oblique tongue lock body also includes an unlocking motor, which is transmission-connected to the dial wheel 5 and is used to drive the dial wheel 5 to rotate forward or reversely. A door opening and closing detection assembly 6 is also installed in the lock body housing 1 above the flip tongue 21 and the clutch assembly 3; the door opening and closing detection assembly 6 includes a detection tongue 61, a detection tongue reset spring 62, a sliding control plate 63 and a micro-motion detection switch 64; the detection tongue 61 is elastically connected to the lock body housing 1 through the detection tongue reset spring 62, so that the detection tongue 61 elastically extends from the side of the lock body housing 1; the outer end of the detection tongue 61 is in an arc shape, one end of the sliding control plate 63 is fixedly connected to the inner end of the detection tongue 61, and the other end of the sliding control plate 63 is arranged below the micro-motion detection switch 64;

[0049] When the detection tongue 61 is retracted into the lock body shell 1, the other end of the sliding control plate 63 moves inward to the switch part that triggers the micro-motion detection switch 64; when the detection tongue 61 is extended out of the lock body shell 1, the other end of the sliding control plate 63 moves outward to the switch part that releases the micro-motion detection switch 64; the micro-motion detection switch 64 is connected to the unlocking motor through the control circuit.

[0050] When this embodiment is working, the dial wheel 5 can be connected to the lock core or to the unlocking motor. Figure 4 and Figure 5 The specific working process of this embodiment is as follows:

[0051] When the unlocking action is performed, the unlocking motor drives the dial wheel 5 to rotate clockwise, and the dial wheel 5 drives the separation dial ring 41 to rotate synchronously. The toggle part of the separation dial ring 41 pushes the toggle column 421 at one end of the transmission plate 42, so that the transmission plate 42 rotates counterclockwise with the first fixed shaft 71 as the axis. During the counterclockwise rotation of the transmission plate 42, the transmission connection column 431 at one end of the separation fork 43 slides in the transmission slide groove 422 at the other end of the transmission plate 42, so that the separation fork 43 rotates clockwise with the second fixed shaft 72 as the axis. When the separation fork 43 rotates to the maximum stroke, the hook part 432 of the separation fork 43 hooks the separation toggle column 310 at the lower part of the separation plate 31 downward, so that the separation plate 31 is separated from the clutch groove 210 of the flip tongue 21. At this time, the flip tongue 21 can be flipped freely. Whether it is the door opening action or the door closing action, the flip tongue 21 can automatically flip to meet the operation requirements.

[0052] Specifically, when the door is pulled out in the direction of the first inclined surface of the flip tongue 21, it is a door opening action; when the door is pushed in the direction of the second inclined surface of the flip tongue 21, it is a door closing action. When the door is opened, the first inclined surface of the flip tongue 21 abuts against the inner side wall of the lock tongue groove on the side of the door frame, thereby causing the flip tongue 21 to flip toward the second inclined surface; when the flip tongue 21 flips toward the second inclined surface to the maximum stroke, the first inclined surface of the flip tongue 21 is converted from being parallel to the inner side wall of the lock tongue groove to being inclined against it. At this time, if the door is continued to be pulled in the direction of the first inclined surface, the flip tongue 21 is squeezed by the inner side wall of the lock tongue groove to generate kinetic energy to shrink into the lock body shell 1, thereby pushing the flip tongue push block 22 to move into the lock body shell 1 together. When the flip tongue 21 is completely retracted into the lock body shell 1, the entire door opening action is completed. When the door is fully opened, the flip tongue push block 22 is pushed outward to the initial position by the flip tongue reset spring 23, so that the flip tongue 21 also pops out to the outside of the lock body shell 1 again.

[0053] When the door is fully opened, the detection tongue return spring 62 causes the detection tongue 61 to extend out of the lock body housing 1, thereby causing the sliding control plate 63 to move to the left. At this time, the micro-motion detection switch 64 is released, and after receiving the release signal of the micro-motion detection switch 64, the control circuit keeps the unlocking motor in the current state, thereby keeping the separation plate 31 and the flip tongue 21 in the separated state, and the flip tongue 21 is always in an active state that can be freely flipped, so as to facilitate the door closing action.

[0054] When the door is closed, the flip tongue 21 is blocked by the outer edge of the door frame and flips toward the first inclined surface. When the flip tongue 21 flips toward the first inclined surface to the maximum stroke, the second inclined surface of the flip tongue 21 changes from being parallel to the outer side of the door frame to being inclined against it. At this time, if the door is pushed toward the second inclined surface, the flip tongue 21 is squeezed by the outer edge of the door frame and generates kinetic energy to shrink into the lock body shell 1, thereby pushing the flip tongue push block 22 to move into the lock body shell 1. When the flip tongue 21 is completely retracted into the lock body shell 1, the entire door closing action is completed. When the door is completely closed, the flip tongue push block 22 is pushed outward to the initial position by the flip tongue reset spring 23, so that the flip tongue 21 is also re-popped out to the outside of the lock body shell 1 and inserted into the lock tongue groove on the side of the door frame.

[0055] After the door is closed, the detection tongue 61 is also compressed by the door frame, causing the sliding control plate 63 to slide to the right; at this time, the other end of the sliding control plate 63 closes the micro-motion detection switch 64 to trigger the detection signal. When the control circuit receives the signal of the micro-motion detection switch 64 being closed, it controls the dial wheel 5 to rotate counterclockwise through the unlocking motor. At this time, the separation dial ring 41 is reset together with the dial wheel 5 under the action of the first reset torsion spring 81; the transmission plate 42 is no longer resisted by the separation dial ring 41, and is reset under the action of the second reset torsion spring 82; at the same time, the transmission slide groove 422 on the transmission plate 42 resets the separation fork 43 through the transmission connecting column 431 on the separation fork 43. Finally, the separation plate 31 is reset upward under the action of the separation plate reset spring 32, and is reinserted into the clutch groove 210 of the flip tongue 21 to achieve the door locking operation.

[0056] In the locked state, the flip tongue 21 is locked and cannot rotate freely. At this time, even if an object is inserted from the first inclined surface side of the flip tongue 21, the flip tongue 21 cannot be pushed, so that the flip-type oblique tongue lock body of the utility model embodiment has the function of anti-insertion and anti-theft, preventing the lock body from being opened by abnormal means, and protecting the personal and property safety of the user.

[0057] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A flip-type latch bolt lock body with anti-insertion function, characterized in that: It includes a lock body shell, and a flip tongue assembly, a clutch assembly, a clutch drive assembly and a dial wheel installed in the lock body shell; A lock tongue side plate is provided on one side of the lock body shell, and a lock tongue mounting hole is provided on the lock tongue side plate for the flip tongue assembly to extend out; The flip tongue assembly comprises a flip tongue, a flip tongue push block and a flip tongue return spring; The flip tongue is installed in the lock tongue mounting hole of the lock tongue side plate, and the outer end of the flip tongue has a first inclined surface and a second inclined surface parallel to the vertical direction, and the first inclined surface and the second inclined surface intersect at an acute angle, so that the outer end of the flip tongue is wedge-shaped as a whole; the inner end of the flip tongue has an arc-shaped cylindrical surface; the upper and lower sides of the inner end of the flip tongue are provided with protruding limiting bosses, and the limiting bosses make the height of the inner end of the flip tongue greater than the height of the lock tongue mounting hole, so as to limit the inner end of the flip tongue in the lock body shell, so that only the outer end of the flip tongue can extend from the lock tongue mounting hole; wherein, a clutch groove is provided on the lower limiting boss, and the clutch groove passes through the limiting boss in a direction parallel to the first inclined surface; The flip tongue push block is slidably connected to the lock body shell in a direction perpendicular to the lock tongue side plate, the outer end of the flip tongue push block abuts against the arc-shaped cylindrical surface of the flip tongue, and the inner end of the flip tongue push block is elastically connected to the lock body shell through a flip tongue reset spring, so that the flip tongue can be elastically and telescopically installed in the lock tongue mounting hole; the outer end of the flip tongue push block has an arc-shaped connecting groove, and the arc-shaped connecting groove matches the arc-shaped cylindrical surface of the inner end of the flip tongue, so that the flip tongue and the flip tongue push block have the freedom of relative rotation along the vertical axis; The clutch assembly comprises a separation plate and a separation plate return spring; the upper part of the separation plate passes through the flip tongue push block in the vertical direction, so that the separation plate can slide in the flip tongue push block in the vertical direction, and the lower part of the separation plate is provided with a plug-in portion matching the clutch groove of the flip tongue; the separation plate return spring is elastically connected between the separation plate and the flip tongue push block, and is used to provide elastic potential energy for the separation plate to move upward, so that the separation plate is maintained at the maximum stroke of the upward movement when not subjected to external force; when the separation plate is at the maximum stroke of the upward movement, the plug-in portion of the separation plate is inserted into the clutch groove of the flip tongue, so that the flip tongue loses the freedom to rotate around the vertical axis; when the separation plate is at the maximum stroke of the downward movement, the plug-in portion of the separation plate is disengaged from the clutch groove of the flip tongue, so that the flip tongue obtains the freedom to rotate around the vertical axis; The dial wheel is transmission-connected to the separation plate through a clutch drive assembly, and is used to drive the separation plate to move up and down in a vertical direction through the clutch drive assembly, so as to control the limiting effect of the separation plate on the flip tongue.

2. The flip-type latch bolt lock body with anti-insertion function according to claim 1, characterized in that: It also includes an unlocking motor, which is transmission-connected to the thumbwheel and is used to drive the thumbwheel to rotate forward or reverse.

3. The flip-type latch bolt lock body with anti-insertion function according to claim 2, characterized in that: A door opening and closing detection assembly is also installed in the lock body shell above the flip tongue and the clutch assembly; the door opening and closing detection assembly includes a detection tongue, a detection tongue reset spring, a sliding control plate and a micro-motion detection switch; the detection tongue is elastically connected to the lock body shell through the detection tongue reset spring, so that the detection tongue elastically extends from the side of the lock body shell; the outer end of the detection tongue is in an arc shape, one end of the sliding control plate is fixedly connected to the inner end of the detection tongue, and the other end of the sliding control plate is arranged below the micro-motion detection switch; When the detection tongue is retracted into the lock body housing, the other end of the sliding control plate moves inward to the switch portion that triggers the micro-motion detection switch; When the detection tongue extends out of the lock body shell, the other end of the sliding control plate moves outward to release the switch portion of the micro-motion detection switch; the micro-motion detection switch is connected to the unlocking motor through the control circuit.

4. The flip-type latch bolt lock body with anti-insertion function according to claim 1, characterized in that: The clutch drive assembly includes a release shift ring, a transmission plate and a release shift fork; The separation dial ring is fixed on the dial wheel and is connected to rotate synchronously with the dial wheel. The separation dial ring has a radially protruding dial portion. The middle part of the transmission plate is rotatably connected to the inner wall of the lock body shell through a first fixed shaft, one end of the transmission plate is provided with a toggle column, and the other end of the transmission plate is provided with a transmission slide groove; A transmission connection column is provided at one end of the separation fork, and a hook portion is provided at the other end of the separation fork, and the bending portion of the hook portion is rotatably connected to the inner wall of the lock body shell through a second fixed shaft; a separation toggle column is provided at the lower part of the separation plate, and the separation toggle column is arranged in the hook portion of the separation fork; The toggle part on the separation shift ring is transmission-connected to the toggle post at one end of the transmission plate, and the transmission connection post at one end of the separation shift fork is slidably connected to the transmission slide groove at the other end of the transmission plate, so that the transmission plate is transmission-connected to the separation shift fork; When the paddle wheel rotates forward, the separation fork is driven to rotate through the separation shift ring and the transmission plate in turn, and the hook portion of the separation fork hooks the separation shift column at the lower part of the separation plate downward, so that the separation plate is disengaged from the clutch groove of the flip tongue.

5. The flip-type latch bolt lock body with anti-insertion function according to claim 4, characterized in that: The thumbwheel is provided with a first reset torsion spring, which is connected to the separation thumbwheel and is used for resetting the separation thumbwheel.

6. The flip-type latch bolt lock body with anti-insertion function according to claim 5, characterized in that: A second reset torsion spring is arranged on the first fixed shaft, and the second reset torsion spring is connected to the transmission plate and is used for resetting the transmission plate.

7. The flip-type latch bolt lock body with anti-insertion function according to claim 1, characterized in that: A clutch groove is also provided on the limiting boss located at the lower side of the flip tongue, and the clutch groove passes through the limiting boss along a direction parallel to the first inclined surface.

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