CN212406393U

CN212406393U - Square spring bolt anticollision institution and lock

Info

Publication number: CN212406393U
Application number: CN202021264929.2U
Authority: CN
Inventors: 不公告发明人
Original assignee: CMECH Guangzhou Industrial Ltd
Current assignee: CMECH Guangzhou Industrial Ltd
Priority date: 2020-07-01
Filing date: 2020-07-01
Publication date: 2021-01-26
Anticipated expiration: 2030-07-01

Abstract

The utility model discloses a square spring bolt anti-collision mechanism and a door lock, wherein, the square spring bolt anti-collision mechanism comprises a shell, a square spring bolt and a safety piece which can stretch to one side of the shell, and a movable plug-in piece which is slidably arranged in the shell; the safety piece is linked with the movable plug-in unit, and a groove for allowing one end of the movable plug-in unit to extend into is formed in the square bolt; when the safety piece extends out of one side of the shell at least due to opening the door, the movable plug-in unit resets and is inserted into the groove. The square bolt anti-collision mechanism can prevent the square bolt from extending out of the lock body after the door is opened, so that an anti-collision effect is achieved. The utility model discloses a square spring bolt anticollision institution can prevent that square spring bolt from stretching out from the lock body after opening the door, avoids square spring bolt to bump and damage.

Description

Square spring bolt anticollision institution and lock

Technical Field

The utility model belongs to the technical field of the tool to lock, concretely relates to square spring bolt anticollision institution and lock.

Background

The world lock is a kind of tool to lock that can lock door upper and lower side brake piece when closing the lock, and its theory of operation is as follows: when the door is opened, the lock core is opened by a key, the square bolt retracts, the handle is pressed downwards by a certain angle (such as 45 degrees), the latch bolt retracts, meanwhile, the power rod drives the upper brake plate and the lower brake plate to retract, the door is opened, after the handle is released, the latch bolt extends out, and the handle can return; when the door is locked, the handle is lifted by a certain angle (such as 45 degrees), the power rod drives the upper brake piece and the lower brake piece to extend out, the lock core is locked by a key or an indoor operating knob, the square bolt also extends out to be locked, the door is locked, and the handle can return after the handle is released. When the door is locked, the door is simultaneously limited by the upper and lower brake plates, the square bolt and the latch bolt, so that the door has better safety.

However, after the existing home door lock such as a top-bottom door lock is opened, the square bolt is easily partially or even completely extended out of the lock body due to a user misoperation, and the like, and then the square bolt may be damaged by collision (for example, in windy weather, the door is blown by wind force to close, and the square bolt collides with the door frame).

SUMMERY OF THE UTILITY MODEL

In order to overcome the above disadvantages of the prior art, an object of the present invention is to provide a square bolt anti-collision mechanism, which can prevent the square bolt from extending out of the lock body after the door is opened, and avoid the collision of the square bolt and damage.

The utility model discloses a reach its purpose, the technical scheme who adopts as follows:

a square bolt anti-collision mechanism comprises a shell, a square bolt, a safety piece and a movable plug-in piece, wherein the square bolt and the safety piece can stretch out and draw back to one side of the shell; the safety piece is linked with the movable plug-in unit, a groove into which one end of the movable plug-in unit can extend is formed in the square bolt, and when the safety piece retracts to one side of the shell due to at least closing of the door, the safety piece drives the movable plug-in unit to withdraw from the groove; when the safety piece extends out of one side of the shell at least due to opening of the door, the movable plug-in unit is reset and inserted into the groove.

Furthermore, the movable plug-in comprises a sliding block and a first elastic piece which are arranged along the telescopic direction perpendicular to the safety piece, two ends of the sliding block are respectively provided with a stress part and a limiting part which can extend into the groove, one end of the first elastic piece is contacted with the end surface of the stress part, and the other end of the first elastic piece is contacted with the inner wall of the shell; a first notch is formed between the stress part and the limiting part, and a stress boss is formed on one side of the first notch close to the stress part;

the safety part includes bumper and the second elastic component that sets up along its flexible direction, the bumper passes through second elastic component elasticity stretch out and draw back in one side of casing, the afterbody of bumper is arranged in the first breach, just seted up the orientation on the afterbody edge of bumper the second breach that the atress boss set up, wherein be formed with on one side of second breach court the atress inclined plane that the extending direction slope of bumper set up, the atress inclined plane is used for working as the bumper withdrawal during one side of casing, promote the slider is along keeping away from the direction of square spring bolt slides, so that spacing portion is followed withdraw from in the recess.

Further, the head of the safety lever has an inclined surface disposed toward the door closing direction to allow the head of the safety lever to be pressed to be retracted into one side of the housing when the door is closed.

Furthermore, the bumper has a rod head and a stress rod connected with the rod head, the stress rod is far away from the edge of one end of the rod head and is provided with the second notch, a spring mounting surface is formed at the joint between the rod head and the stress rod, wherein one end of the second elastic part is in contact with the spring mounting surface, and the other end of the second elastic part is in contact with the inner wall of the shell.

Furthermore, a protruding shaft is arranged on the spring mounting surface, the protruding shaft extends into one end of the second elastic piece, and the other end of the second elastic piece is in contact with the inner wall of the shell.

Furthermore, a blind hole is formed in the end face of the stress part, one end of the first elastic piece extends into the blind hole, and the other end of the first elastic piece is in contact with the inner wall of the shell.

Furthermore, an unlocking shifting block which can be driven by a key and a rotating shifting block which is used for driving the square lock bolt to stretch are further arranged in the shell, the rotating shifting block is in transmission connection with the unlocking shifting block, a sliding groove is formed in the square lock bolt, the rotating shifting block is provided with a shifting rod which can slide along the sliding groove, and when the square lock bolt completely extends out of one side of the shell, the shifting rod is abutted against the inner wall of the sliding groove and forms an included angle which can prevent the square lock bolt from retracting.

Furthermore, the deflector rod is in an L shape, wherein one end of the deflector rod is arranged opposite to the sliding groove and extends towards the sliding groove to form a sliding end, and the sliding end extends into the sliding groove and can slide along the sliding groove.

Further, the unlocking shifting block is provided with a first gear part, the rotating shifting block is also provided with a second gear part connected with the shifting lever, and the first gear part is meshed with the second gear.

Correspondingly, the utility model also provides a lock, including aforementioned square spring bolt anticollision institution.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a square spring bolt anticollision institution, through set up the recess on square spring bolt, add insurance spare and the movable plug-in components that link with insurance spare in the casing, so, on the one hand, after closing the door, insurance spare can retract casing one side and drive the one end of movable plug-in components and withdraw from the recess of square spring bolt and realize the unblock, make square spring bolt can normally stretch out casing one side and lock the door, guaranteed the normal use of square spring bolt; on the other hand, after retracting the square bolt into the shell and opening the door, the safety piece can extend out of one side of the shell, so that the movable plug-in unit resets and is locked in the groove of the square bolt, and then the square bolt is clamped by one end of the movable plug-in unit and cannot extend out of the shell, thereby avoiding the situation that the square bolt extends out accidentally and is damaged by collision, and being beneficial to prolonging the service life of the door lock.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.

Fig. 1 is a schematic view of an external structure of a door lock according to an embodiment of the present invention;

fig. 2 is a schematic view of an internal state of the front latch bolt anti-collision mechanism in an embodiment of the present invention;

FIG. 3 is a front view of FIG. 2;

fig. 4 is a schematic view of an internal state of the anti-collision mechanism of the embodiment of the present invention, in which the square bolt extends out of the rear bolt;

FIG. 5 is a front view of FIG. 4;

fig. 6 is a schematic structural view of a square bolt according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a movable plug-in unit according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a safety member according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a rotary shifting block according to an embodiment of the present invention.

Description of reference numerals:

1-shell, 2-square bolt, 21-sliding chute, 22-groove, 3-safety piece, 31-second elastic piece, 32-safety rod, 321-rod head, 3211-inclined plane, 322-stress rod, 3221-stress inclined plane, 3222-second notch, 33-convex shaft, 4-movable plug-in piece, 41-sliding block, 411-stress part, 4111-stress boss, 4112-blind hole, 412-limiting part, 413-first notch, 42-first elastic piece, 5-unlocking shifting block, 51-first gear part, 6-rotating shifting block, 61-shifting rod, 611-sliding end and 62-second gear part.

Detailed Description

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in detail with reference to the accompanying drawings and detailed description. In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, and the described embodiments are merely some embodiments, rather than all embodiments, of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1, 2, 4, 6, 7 and 8, an embodiment of the present invention provides a square bolt anti-collision mechanism, which includes a housing 1, a square bolt 2 and a safety element 3 that are retractable on one side of the housing 1, and a movable plug-in unit 4 slidably mounted in the housing 1; the safety piece 3 is linked with the movable plug-in 4, a groove 22 (illustratively, the groove 22 is arranged on one side edge of the square bolt 2 close to the safety piece 3) for allowing one end of the movable plug-in 4 to extend into is arranged on the square bolt 2, wherein, when the safety piece 3 retracts to one side of the shell 1 at least because of closing the door, the safety piece 3 drives the movable plug-in 4 to withdraw from the groove 22; when the safety member 3 is protruded from one side of the housing 1 at least by opening the door, the movable insert 4 is restored and inserted into the groove 22.

According to the square bolt anti-collision mechanism, the groove 22 is formed in the square bolt 2, the safety piece 3 and the movable plug-in 4 linked with the safety piece 3 are additionally arranged in the shell 1, so that on one hand, after the door is closed, the safety piece 3 can retract to one side of the shell 1 and drive one end of the movable plug-in 4 to withdraw from the groove 22 of the square bolt 2 to realize unlocking, the square bolt 2 can normally extend out of one side of the shell 1 to lock the door, and the normal use of the square bolt 2 is ensured; on the other hand, after retracting square bolt 2 in casing 1 and opening the door (the user is when opening the door, can use the key earlier or in the mode of indoor operation hand button with square bolt 2 withdrawal casing 1), insurance piece 3 can stretch out casing 1 one side, make movable plug-in components 4 reset and lock in inserting square bolt 2's recess 22, and then make square bolt 2 blocked and can't stretch out casing 1 by movable plug-in components 4's one end, thereby can avoid square bolt 2 to stretch out by accident (if rotate the key carelessly and make square bolt 2 stretch out by accident) and lead to being hit badly, be favorable to improving the life of door lock.

Further, referring to fig. 2 to 8, in an exemplary embodiment, the movable insert 4 includes a sliding block 41 and a first elastic member 42 arranged along a direction perpendicular to the telescopic direction of the safety member 3, two ends of the sliding block 41 respectively have a force-receiving portion 411 and a position-limiting portion 412 capable of extending into the groove 22, one end of the first elastic member 42 contacts with an end surface of the force-receiving portion 411, and the other end contacts with an inner wall of the housing 1; a first notch 413 is formed between the force-receiving portion 411 and the limiting portion 412, and a force-receiving boss 4111 is formed on one side of the first notch 413 close to the force-receiving portion 411; the safety member 3 includes a safety lever 32 and a second elastic member 31 arranged along the extension direction thereof, the safety lever 32 is elastically extended and retracted in one side of the housing 1 through the second elastic member 31, the tail of the safety lever 32 is disposed in the first notch 413, and a second notch 3222 arranged toward the force receiving protrusion 4111 is disposed on the edge of the tail of the safety lever 32, wherein a force receiving inclined surface 3221 inclined toward the extension direction of the safety lever 32 is formed on one side of the second notch 3222, and the force receiving inclined surface 3221 is configured to push the slider 41 to slide along the direction away from the square bolt 2 when the safety lever 32 retracts into one side of the housing 1, so that the limiting portion 412 is withdrawn from the groove 22. The first elastic member 42 and the second elastic member 31 may be elastic members such as a spring, a spring plate, and an elastic band, as long as the use requirements can be met, and this embodiment is not particularly limited thereto, and illustratively, the first elastic member 42 and the second elastic member 31 are both pressure springs.

In the present embodiment, based on the above structural design, after the square bolt 2 is retracted into the housing 1 and the door is opened, the safety lever 32 can extend out of one side of the housing 1, the sliding block 41 is reset under the action of the first elastic element 42, and the limiting part 412 can be inserted into the groove 22 of the square bolt 2 for locking, so that the square bolt 2 is clamped by the limiting part 412 and cannot extend out of the housing 1; on the other hand, after the door is closed, the safety lever 32 can retract to the side of the housing 1 and drive the limiting part 412 of the sliding block 41 to withdraw from the groove 22 of the square bolt 2, so as to unlock the door, and the square bolt 2 can normally extend out of the side of the housing 1 to lock the door.

Further, referring to fig. 2 to 8, in an exemplary embodiment, the head of the safety lever 32 has an inclined surface 3211 disposed toward the door closing direction to press the head of the safety lever 32 to retract into one side of the housing 1 when the door is closed. Illustratively, the head of the safety lever 32 is triangular in shape with two inclined surfaces 3211.

In the present embodiment, based on the above-mentioned structural design, when the head of the safety lever 32 contacts with the edge of the corresponding door frame or another door when the door is closed, the head of the safety lever 32 is pressed to retract into one side of the housing 1, so that the safety lever 32 can drive the limiting portion 412 of the sliding block 41 to withdraw from the groove 22 of the square bolt 2 to unlock the opposite bolt 2; when the door is opened, when the head of the safety rod 32 is separated from the edge of the corresponding door frame or another door, the head of the safety rod 32 can extend out of one side of the housing 1 under the elastic restoring force of the second elastic member 31, so that the limiting portion 412 of the sliding block 41 can be inserted into the groove 22 of the square bolt 2 to clamp the square bolt 2, and the square bolt 2 cannot extend out.

Further, referring to fig. 2 to 8, in an exemplary embodiment, the safety lever 32 has a rod head 321 and a force-bearing rod 322 connected to the rod head 321, an edge of one end of the force-bearing rod 322 far from the rod head 321 is provided with a second notch 3222, and a spring mounting surface (not labeled in the figures) is formed at a connection position between the rod head 321 and the force-bearing rod 322, wherein one end of the second elastic member 31 contacts with the spring mounting surface, and the other end contacts with an inner wall of the housing 1. The club head 321 is triangular, but in other embodiments, the club head 321 may be conical or truncated cone as long as the desired effect is achieved, and the embodiment is not limited thereto.

In the present embodiment, based on the above-mentioned structural design, the safety lever 32 can elastically extend and contract into one side of the housing 1.

Further, referring to fig. 2, 4 and 8, in an exemplary embodiment, a protruding shaft 33 is provided on the spring mounting surface, the protruding shaft 33 extends into one end of the second elastic member 31, and the other end of the second elastic member 31 contacts the inner wall of the housing 1. Therefore, the stability of the second elastic member 31 in extension and retraction is improved, so that the extension and retraction of the safety lever 32 can be more stable.

Further, referring to fig. 3 and 7, in an exemplary embodiment, a blind hole 4112 is formed on an end surface of the force-receiving portion 411, and one end of the first elastic member 42 extends into the blind hole 4112, and the other end of the first elastic member contacts with an inner wall of the housing 1. Thus, the stability of the first elastic element 42 in stretching is improved, so that the movement of the slider 41 can be more stable.

Further, referring to fig. 4, 5, 6 and 9, in an exemplary embodiment, an unlocking dial block 5 for driving by a key and a rotating dial block 6 for driving the square bolt 2 to extend and retract are further installed in the housing 1, the rotating dial block 6 is in transmission connection with the unlocking dial block 5, a sliding slot 21 is formed in the square bolt 2 (illustratively, the length direction of the sliding slot 21 is perpendicular to the extending and retracting direction of the square bolt 2), the rotating dial block 6 has a shift lever 61 capable of sliding along the sliding slot 21, wherein when the square bolt 2 completely extends out of one side of the housing 1, the shift lever 61 abuts against the inner wall of the sliding slot 21 and forms an included angle capable of preventing the square bolt 2 from retracting (illustratively, the included angle formed between the shift lever 61 and the sliding slot 21 is a right angle).

In this embodiment, based on the above structural design, not only make the square bolt scalable in one side of casing 1, when square bolt 2 stretches out one side of casing 1 completely moreover, driving lever 61 can offset and form 90 dead angles with spout 21 with the inner wall of spout 21, so, can prevent that square bolt 2 from stretching out in being prized back casing 1 maliciously to the security of lock can effectively be improved.

Further, referring to fig. 4, 5, 6 and 9, in an exemplary embodiment, the shift lever 61 is L-shaped, wherein one end of the shift lever 61 is disposed opposite to the slide groove 21 and extends toward the slide groove 21 to form a sliding end 611, and the sliding end 611 extends into the slide groove 21 and can slide along the slide groove 21.

In the present embodiment, based on the above structural design, the shift lever 61 can drive the square bolt 2 to extend out of or retract into the housing 1 during the process of sliding back and forth along the sliding slot 21, and the structure is simple and smart.

Further, referring to fig. 2, 3, 4, 5 and 9, in an exemplary embodiment, the unlocking movement block 5 has a first gear portion 51, and the rotating movement block 6 further has a second gear portion 62 connected with the lever 61 (illustratively, the lever 61 is connected with and integrated with the second gear portion 62), wherein the first gear portion 51 is engaged with the second gear. Illustratively, the first gear part 51 is provided with a rectangular preformed hole (not labeled in the figure) for inserting a key, wherein in an actual application scenario, the rectangular preformed hole faces to the outdoor side for inserting the key, so that a user can open/close the square bolt 2 through the key outdoors to lock or unlock the door; and this rectangle preformed hole is towards indoor one side, can cooperate a hand button to the user can open/close square bolt 2 at indoor accessible hand button, realizes locking the door or opens the door.

In this embodiment, based on the above structural design, the transmission connection between the rotating shifting block 6 and the unlocking shifting block 5 is realized, so that when the unlocking shifting block 5 is rotated by a key, the rotating shifting block 6 can drive the shifting rod 61 to rotate synchronously, and further, when the shifting rod 61 rotates, the sliding end 611 of the shifting rod can slide back and forth along the sliding groove 21 to drive the square lock bolt 2 to extend out of or retract into the housing 1.

Correspondingly, the embodiment of the utility model provides a still provide a lock, square spring bolt anticollision institution in above-mentioned arbitrary embodiment.

In this implementation, benefit from the improvement of above-mentioned square spring bolt anticollision institution, the lock of this embodiment has the same technological effect with above-mentioned square spring bolt anticollision institution, and the repeated description is omitted here. It should be noted that the door lock of the present embodiment may be a top-bottom door lock or other type lock, and the present embodiment does not specifically limit this.

For the convenience more fully understand the utility model discloses a square spring bolt anticollision institution explains its theory of operation for the example with a comparatively specific embodiment below:

referring to fig. 1 to 9, when the rod head 321 of the safety lever 32 contacts with the edge of the corresponding door frame or another door when the door is locked, the rod head 321 of the safety lever 32 is partially retracted into one side of the housing 1 due to the pressure, the second elastic member 31 is compressed during the process that the safety lever 32 is retracted into the housing 1, the stressed inclined surface 3221 contacts with the stressed boss 4111 and pushes the stressed boss 4111, so that the first elastic member 42 is compressed, the limiting part 412 of the sliding block 41 is withdrawn from the groove 22 of the square bolt 2 to unlock the square bolt 2, the unlocking dial 5 is rotated by using the key, the rotating dial 6 is driven by the unlocking dial 5, the shift rod 61 slides from the end of the sliding groove 21 close to the unlocking dial 5 to the other end of the sliding groove 21 during the rotation of the rotating dial 6, the shift rod 61 pushes the inner wall of the sliding groove 21 during the sliding of the shift rod 61 along the sliding groove 21, the square bolt 2 slides outwards and gradually extends out of one side of the shell 1, when the square bolt 2 completely extends out of one side of the shell 1, the door locking action is completed, and at the moment, the deflector rod 61 abuts against the inner wall of the sliding groove 21 and forms a 90-degree dead angle with the sliding groove 21, so that the opposite side bolt 2 is jacked; when the door is opened, the unlocking shifting block 5 can be rotated by a key, the unlocking shifting block 5 drives the rotating shifting block 6 to rotate, in the rotating process of the rotating shifting block 6, the shifting rod 61 slides from one end of the sliding groove 21 close to the unlocking shifting block 5 to the other end of the sliding groove 21 far away from the unlocking shifting block 5, in the sliding process of the shifting rod 61 along the sliding groove 21, the shifting rod 61 pushes and presses the inner wall of the other side of the sliding groove 21, so that the square lock bolt 2 slides inwards and gradually retracts to one side of the shell 1, and when the square lock bolt 2 retracts to one side of the shell 1 completely, the groove 22 is arranged opposite to the limiting part 412 of the sliding; when the square bolt 2 retracts to one side of the housing 1 completely and opens the door, the rod head 321 of the safety lever 32 is separated from the edge of the corresponding door frame or the other door, at this time, under the action of the elastic restoring force of the second elastic member 31, the rod head 321 of the safety lever 32 can extend out of one side of the housing 1 completely, in the process that the safety lever 32 extends out of the housing 1, the stress boss 4111 gradually gets rid of the limitation of the stress inclined plane 3221, and under the pushing of the elastic restoring force of the first elastic member 42, the limiting part 412 of the sliding block 41 is inserted into the groove 22 of the square bolt 2 to clamp the square bolt 2, so that the square bolt 2 cannot extend out, thereby preventing the square bolt 2 from extending out accidentally to cause being damaged by collision, and being beneficial to prolonging the service life of.

In addition, it should be noted that the utility model discloses a square spring bolt anticollision institution and other contents of lock can refer to prior art, no longer describe herein.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made by the technical spirit of the present invention to the above embodiments do not depart from the technical solution of the present invention, and still fall within the scope of the technical solution of the present invention.

Claims

1. The square bolt anti-collision mechanism is characterized by comprising a shell, a square bolt, a safety piece and a movable plug-in piece, wherein the square bolt and the safety piece can stretch out and draw back to one side of the shell; the safety piece is linked with the movable plug-in unit, a groove into which one end of the movable plug-in unit can extend is formed in the square bolt, and when the safety piece retracts to one side of the shell due to at least closing of the door, the safety piece drives the movable plug-in unit to withdraw from the groove; when the safety piece extends out of one side of the shell at least due to opening of the door, the movable plug-in unit is reset and inserted into the groove.

2. The square bolt anti-collision mechanism according to claim 1, wherein the movable plug-in component comprises a sliding block and a first elastic component which are arranged along a direction perpendicular to the extension direction of the safety component, two ends of the sliding block are respectively provided with a stressed part and a limiting part which can extend into the groove, one end of the first elastic component is in contact with the end surface of the stressed part, and the other end of the first elastic component is in contact with the inner wall of the shell; a first notch is formed between the stress part and the limiting part, and a stress boss is formed on one side of the first notch close to the stress part;

3. The square bolt crash mechanism of claim 2, wherein the head of the safety lever has an inclined surface facing the door closing direction to allow the head of the safety lever to be pressed to retract into one side of the housing when the door is closed.

4. The square bolt anti-collision mechanism according to claim 2, wherein the bumper has a head and a stress rod connected to the head, the edge of one end of the stress rod away from the head is provided with the second notch, and a spring mounting surface is formed at the connection between the head and the stress rod, wherein one end of the second elastic member contacts the spring mounting surface and the other end contacts the inner wall of the housing.

5. The square bolt anti-collision mechanism according to claim 4, wherein a protruding shaft is arranged on the spring mounting surface, the protruding shaft extends into one end of the second elastic piece, and the other end of the second elastic piece is in contact with the inner wall of the shell.

6. The square bolt anti-collision mechanism according to claim 2, wherein the end surface of the force-bearing part is provided with a blind hole, one end of the first elastic member extends into the blind hole, and the other end of the first elastic member contacts with the inner wall of the housing.

7. The square bolt anti-collision mechanism according to any one of claims 1 to 6, wherein an unlocking shifting block which can be driven by a key and a rotating shifting block which is used for driving the square bolt to stretch are further installed in the housing, the rotating shifting block is in transmission connection with the unlocking shifting block, a sliding groove is formed in the square bolt, the rotating shifting block is provided with a shifting rod which can slide along the sliding groove, and when the square bolt completely extends out of one side of the housing, the shifting rod abuts against the inner wall of the sliding groove and forms an included angle which can prevent the square bolt from retracting.

8. The square bolt anti-collision mechanism according to claim 7, wherein the shift lever is L-shaped, wherein one end of the shift lever is opposite to the sliding slot and extends toward the sliding slot to form a sliding end, and the sliding end extends into the sliding slot and can slide along the sliding slot.

9. The square bolt anti-collision mechanism according to claim 7, wherein the unlocking shift block has a first gear portion, and the rotating shift block further has a second gear portion connected to the shift lever, wherein the first gear portion is engaged with the second gear.

10. A door lock comprising a square bolt anticollision mechanism as claimed in any one of claims 1 to 9.