A latch bolt mechanism and door lock having the same

Abstract

The invention discloses a latch bolt mechanism and a door lock having the same, wherein the latch bolt mechanism comprises: a mounting frame; a latch bolt assembly comprising a first latch bolt and a second latch bolt pivotally connected to the mounting frame and capable of rotating between a locked position and an unlocked position around an axis extending parallel to the side edge of the fan body; a limiting assembly arranged between the mounting frame and the latch bolt assembly, which can reach a first limiting state of releasing the first latch bolt and locking the second latch bolt or a second limiting state of locking the first latch bolt and releasing the second latch bolt through adjustment; the active end of the latch bolt in the released state can rotate under the action of the lock hole wall of the door frame; the active end of the latch bolt in the locked state is locked in the locked position, and is in a self-locking relationship with the lock hole wall on the upper side of the door frame. The invention adjusts the limiting assembly to the first limiting state or the second limiting state when reversing is required, and does not need to rotate the latch bolt mechanism 180° in the lock body, thereby avoiding the opening of a large hollow hole in the lock body, and improving the airtightness and strength of the lock body.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical locks, and in particular to a latch bolt mechanism and a door lock having the same. Background Art

[0002] Common door locks are generally provided with an inclined bolt, which is a component in the door lock that automatically retracts and retracts in the lock body in cooperation with the door frame to lock the door leaf on the door frame when the door is closed, and retracts into the lock body under the drive of a handle, a key or the like when the door is opened to realize the function of releasing the door leaf lock; the anti-theft inclined bolt assembly in the prior art includes a main inclined bolt and an anti-insertion bolt. When the inclined bolt assembly is in a state of being extended and engaged with the door frame, when a card or a thin sheet is inserted into the gap between the door and the door frame and the curved surface of the inclined bolt is moved, the anti-insertion bolt can effectively block the insertion of the card or the thin sheet, thereby preventing the card or the thin sheet from contacting the main inclined bolt, thereby pushing the inclined bolt to retract into the lock body and opening the door lock, and having an anti-theft function; the anti-insertion bolt also has a power assisting effect when closing the door, that is, when closing the door leaf, the anti-insertion bolt can be in an inclined state consistent with the main bolt by rotating itself when colliding with the door frame, thereby driving the inclined bolt assembly as a whole to retract into the lock body together with the main tongue, thereby reducing the noise generated when closing the door.

[0003] However, the above-mentioned inclined bolt assembly is relatively complex as a whole. Since the door leaf has left-opening and right-opening doors in order to adapt to different building opening environments, early door locks were respectively installed with inclined bolt assemblies dedicated to left-opening doors or right-opening doors. However, this method leads to high manufacturing costs and storage costs. For this reason, the prior art has a method of using a unified inclined bolt assembly. When the door leaf is installed on the wall opening, the installation direction of the inclined bolt assembly on the lock body is adjusted in the corresponding direction according to the opening direction of the door leaf before the lock body is installed on the door leaf. When reversing, the inclined bolt assembly needs to be reversed as a whole. Therefore, it is necessary to open a hollow space on the lock body to allow the inclined bolt to flip 180 degrees for reversing. The hollow space required for reversing by this inclined bolt reversing mechanism is large. After the lock body is installed and used, impurities such as iron filings and wood chips are easily infiltrated into the hollow space of the lock body. The large hollow also reduces the strength of the lock body, affecting the service life of the lock body. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the inclined bolt mechanism in the prior art needs to cooperate with a larger hollow hole on the lock body for rotation and reversal, which reduces the airtightness and strength of the lock shell.

[0005] In a first aspect, an embodiment of the present invention provides a latch bolt mechanism, the latch bolt mechanism comprising:

[0006] A mounting frame adapted to be movably mounted in the lock housing between a locked position and a locked out position and subjected to a biasing force toward the locked out position;

[0007] The latch bolt assembly comprises a first latch bolt and a second latch bolt which are pivotally connected to the mounting frame near the end of the lock body panel and can be rotated between a locked position and an unlocked position around an axis extending parallel to the side edge of the fan body; the first latch bolt and the second latch bolt both have an active end which is composed of a locking surface parallel to the extension direction of the latch bolt assembly and an inclined surface extending at an angle to the locking surface in the locked position, and the inclined surfaces of the first latch bolt and the second latch bolt are arranged in opposite directions to the left and right;

[0008] A limiting assembly is arranged between the mounting frame and the inclined bolt assembly. The limiting assembly can be adjusted to reach a first limiting state in which the first inclined bolt is released and the second inclined bolt is locked, or a second limiting state in which the first inclined bolt is locked and the second inclined bolt is released. The active end of the inclined bolt in the released state can rotate under the action of the lock hole wall of the door frame. The active end of the inclined bolt in the locked state is locked in the locked position, and a self-locking relationship is formed between the inclined bolt and the lock hole wall on the upper door opening side of the door frame, so that the inclined bolt assembly cannot move in the locking direction.

[0009] Furthermore, the first latch bolt and the second latch bolt are rotatably pivoted to the mounting end of the mounting frame close to the end of the lock body panel through a latch bolt shaft;

[0010] The first oblique tongue and the second oblique tongue are arranged vertically along the oblique tongue axis.

[0011] Furthermore, the limiting component comprises:

[0012] A first limiting portion, disposed on the mounting frame and used to limit the first inclined tongue from rotating toward one side;

[0013] A second limiting portion, disposed on the mounting frame and used to limit the second inclined tongue from rotating toward an opposite side;

[0014] A reversing member is movably arranged on the mounting frame between a first limit position and a second limit position, and abuts against the first oblique tongue and the second oblique tongue, restricting the second oblique tongue from rotating toward the other side at the first limit position, and restricting the first oblique tongue from rotating toward the other side at the second limit position;

[0015] The adjusting mechanism is arranged between the mounting frame and the switching member, and is used for moving the switching member and locking the switching member at a first limit position or a second limit position.

[0016] Furthermore, the mounting end of the mounting frame has two side walls that are arranged opposite to each other in an inner and outer direction, the inclined tongue shaft is located between the two side walls, the first limiting portion is a first limiting protrusion on one side wall of the mounting frame corresponding to the first inclined tongue, and the side wall is a first avoidance recess corresponding to the second inclined tongue; the second limiting portion is a second limiting protrusion on the other side wall of the mounting frame corresponding to the second inclined tongue, and the side wall is a second avoidance recess corresponding to the first inclined tongue.

[0017] Further, the reversing member is a reversing plate movably arranged in the installation space between the two side walls of the installation frame; in the first limiting position, the reversing plate is close to the first avoidance recess and cooperates with the second limiting protrusion to abut on the second oblique tongue, so as to limit the second oblique tongue from rotating between the locked position and the unlocked position; in the second limiting position, the reversing plate is close to the second avoidance recess and cooperates with the first limiting protrusion to abut on the first oblique tongue, so as to limit the first oblique tongue from rotating between the locked position and the unlocked position;

[0018] The adjusting mechanism comprises a driving member installed on the mounting frame and threadedly connected to the reversing plate, and the driving member drives the reversing plate to move between a first limit position and a second limit position by rotating.

[0019] Furthermore, the driving member is a screw, and the reversing plate is provided with a threaded hole that cooperates with the screw.

[0020] Optionally, the mounting frame is composed of an inclined tongue frame and a matching plate, and the matching plate is correspondingly mounted and connected to the mounting end of the inclined tongue frame;

[0021] The first limiting protrusion and the first avoiding recess are formed on the side wall formed by the mounting end of the inclined tongue holder, and the second avoiding recess and the second limiting protrusion are formed on the side wall formed by the matching plate;

[0022] The installation space for installing the reversing plate is formed between the inner wall of the matching plate and the inner wall of the installation end of the inclined tongue frame; the inclined tongue shaft is installed on the inclined tongue frame.

[0023] Furthermore, the oblique tongue bracket and the matching plate are correspondingly provided with mounting holes for screws to pass through, and the screw rod of the screw can extend from a mounting hole into the mounting space to be connected with the reversing plate, and the reversing plate matched with its thread can be driven to move toward the side close to the nut by rotating the screw.

[0024] Optionally, the mounting end of the mounting frame includes a first side wall formed with a first limiting protrusion and a first avoiding recess, and a second side wall formed with the second limiting protrusion, the second side wall is a bent wall integrally bent on the first side wall, and the mounting space is formed between the bent wall and the first side wall;

[0025] The second avoidance recess is an avoidance space located at one side of the second side wall.

[0026] Furthermore, a mounting hole for a screw to pass through is provided on the first side wall of the mounting frame. One end of the screw rod can pass through the threaded hole on the reversing plate and the mounting hole on the first side wall in sequence, and then be rotatably mounted on the mounting frame with a retaining spring at the rear end of the mounting hole.

[0027] Optionally, the connecting ends of the first oblique tongue and the second oblique tongue are both provided with a boss suitable for abutting and cooperating with the end of the lock body panel. When the oblique tongue in a released state rotates from an unlocked position to an upper locked position under the action of the door frame lock hole wall, the boss can abut against the lock body panel and drive the mounting frame to move in the locking direction.

[0028] Beneficial effects:

[0029] 1. In the embodiment of the present invention, when the limiting assembly reaches the first limiting state of releasing the first inclined bolt and locking the second inclined bolt through adjustment, when the door leaf is closed, the active end of the first inclined bolt can rotate from the locked position to the unlocked position by itself when colliding with the door frame, thereby driving the inclined bolt mechanism as a whole to retract into the lock body, that is, to move in the locking direction; after the door leaf is closed, the mounting frame is subjected to the biasing force tending to the locked-out position, driving the inclined bolt assembly as a whole to extend out of the lock shell, at this time, the active end of the second inclined bolt is locked in the locked position by the limiting assembly, and the second inclined bolt and the lock hole wall on the door opening side of the door frame are in a self-locking relationship, so that the inclined bolt assembly cannot move in the locking direction. At this time, the function of the first inclined bolt is equivalent to the anti-insertion bolt, and the function of the second inclined bolt is equivalent to the main inclined bolt. Similarly, when the limiting assembly reaches the first limiting state of locking the first inclined bolt and releasing the second inclined bolt through adjustment, the first inclined bolt is equivalent to the main inclined bolt, and the second inclined bolt is equivalent to the anti-insertion bolt.

[0030] The inclined bolt mechanism in this embodiment cooperates with the first inclined bolt and the second inclined bolt to make the inclined bolt mechanism and the door lock using the same have the functions of anti-theft and reducing door closing noise; in addition, the limit assembly can be used to limit the rotation of one of the two inclined bolts and allow the other inclined bolt to rotate between the locked position and the unlocked position. By adjusting the limit assembly, it can be switched between the first limit state and the second limit state. When the inclined bolt mechanism needs to be reversed, it only needs to adjust the limit assembly to the first limit state or the second limit state, without rotating the entire inclined bolt mechanism 180° in the lock body. The reversal is convenient and easy to operate, and it can avoid the need to cooperate with the opening of a larger hollow hole on the lock body for the inclined bolt mechanism to rotate, thereby improving the airtightness of the lock body and reducing the possibility of impurities such as iron filings and wood chips penetrating into the hollow space of the lock body. At the same time, the strength of the lock body can be improved and the service life of the lock body can be extended.

[0031] 2. In the present invention, during the movement of the reversing member between the first limit position and the second limit position, when the reversing member moves to the first limit position, the reversing member and the second limit portion can cooperate to limit the rotation of the second oblique tongue around the pivot axis, so that the second oblique tongue is in a locked state; when the reversing member moves to the second limit position, the reversing member and the first limit portion can cooperate to limit the rotation of the first oblique tongue around the pivot axis, so that the first oblique tongue is in a locked state; by setting an adjustment mechanism, the position of the reversing member can be adjusted, and the reversing member can be locked in the first limit position or the second limit position.

[0032] 3. In the present invention, the first limiting protrusion and the second avoiding recess are both arranged corresponding to the first oblique tongue, and are used to allow the first oblique tongue in the released state to rotate between its unlocked position and the locked position, and limit the first oblique tongue within a preset allowable rotation range; the second limiting protrusion and the first avoiding recess are both arranged corresponding to the second oblique tongue, and are used to allow the second oblique tongue in the released state to rotate between its unlocked position and the locked position, and limit the second oblique tongue within a preset allowable rotation range. The structure is simple and easy to implement.

[0033] In a second aspect, to achieve the above-mentioned object, an embodiment of the present invention further provides a door lock, comprising a lock housing, and a latch bolt mechanism as described in any one of the aforementioned embodiments, wherein the mounting frame is movably mounted in the lock housing between a locked position and a locked-out position and is subjected to a biasing force tending to the locked-out position;

[0034] The handle and the lock core are both linked and coordinated with the oblique bolt mechanism.

[0035] Beneficial effects:

[0036] The door lock provided by the present invention includes the aforementioned oblique bolt mechanism, wherein the technical advantages and effects achieved by the door lock also include the technical advantages and effects achieved by the oblique bolt mechanism, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 It is a schematic diagram of the assembly of the latch bolt mechanism in the first embodiment of the present invention;

[0039] Figure 2 for Figure 1 The schematic diagram of the structure of the latch mechanism when the latch shaft is not installed;

[0040] Figure 3 for Figure 1 Exploded view of the latch mechanism when the drive element is not installed;

[0041] Figure 4 for Figure 1 A partial cross-sectional view of the middle latch mechanism at the point where the cross section passes through the driving member;

[0042] Figure 5a It is a partial cross-sectional view of the inclined tongue mechanism at the section passing through the second inclined tongue when the reversing plate is located at the first limit position;

[0043] Figure 5b It is a partial cross-sectional view of the inclined tongue mechanism at the section passing through the first inclined tongue when the reversing plate is located at the first limit position;

[0044] Figure 6a A partial cross-sectional view of the inclined tongue mechanism at a section passing through the second inclined tongue when the reversing plate is located at the second limit position;

[0045] Figure 6b for Figure 6a A schematic diagram of the structure when the second latch bolt rotates from its locked position to the unlocked position;

[0046] Figure 6c A partial cross-sectional view of the inclined tongue mechanism at a section passing through the first inclined tongue when the reversing plate is located at the second limit position;

[0047] Figure 7a A partial cross-sectional view of the latch bolt mechanism when the door leaf is closed and the first latch bolt has not yet hit the door frame;

[0048] Figure 7b A partial cross-sectional view of the latch bolt mechanism after the door leaf is closed and the first latch bolt hits the door frame;

[0049] Figure 8 This is a schematic diagram of the assembly of the latch bolt mechanism when the latch bolt shaft is not installed in the second embodiment of the present invention;

[0050] Fig. 9 This is a partial cross-sectional view of the latch mechanism in the second embodiment of the present invention, where the cross section passes through the driving member.

[0051] Description of reference numerals:

[0052] 100, door frame; 200, lock panel;

[0053] 1. Mounting frame; 11. First limiting protrusion; 12. First avoiding recess; 13. Second avoiding recess; 14. Second limiting protrusion; 15. Mounting space; 16. Connector; 111. Oblique tongue frame; 1111. Positioning step; 112. Matching plate; 1121. Positioning matching step; 121. First side wall; 122. Second side wall;

[0054] 2. Oblique tongue assembly; 21. First oblique tongue; 22. Second oblique tongue; 211. Boss; 23. Oblique tongue shaft;

[0055] 3. Limiting assembly; 31. Reversing plate; 32. Screw; 33. Circlip. DETAILED DESCRIPTION

[0056] The technical solution of the present invention will be described clearly and completely below 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0058] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0060] like Figures 1 to 7b In the embodiment shown, it should be noted that the direction indicated by the arrow in FIG. 1 is the direction in which the mounting bracket 1 is locked in and out of the housing; Figure 7b The direction indicated by the middle arrow is the locking direction.

[0061] The embodiment of the present invention provides a latch bolt mechanism, which includes a mounting frame 1, a latch bolt assembly 2 and a stop assembly 3. The mounting frame 1 is movably mounted in a lock housing between a locked position and a locked position, and is biased toward the locked position. The mounting frame 1 has a mounting end close to the end of a lock body panel 200 and used to mount the latch bolt assembly 2, such as Figure 2 and Figure 3 As shown, the mounting frame 1 is composed of an inclined tongue frame 111 and a matching plate 112, and the matching plate 112 is arranged on the mounting end of the inclined tongue frame 111. The plate-shaped portion of the mounting end of the inclined tongue frame 111 is arranged parallel to the matching plate 112, and the mounting end of the inclined tongue frame 111 and the matching plate 112 respectively form two side walls arranged opposite to each other in the inner and outer directions, and an inclined tongue shaft 23 extending parallel to the side edge of the fan body and the door and window seam is arranged between the two side walls.

[0062] The latch bolt assembly 2 comprises a first latch bolt 21 and a second latch bolt 22 which are rotatably pivoted to the top end of the mounting end of the mounting frame 1 through a latch bolt shaft 23, and the first latch bolt 21 and the second latch bolt 22 are arranged side by side up and down along the latch bolt shaft 23. The first latch bolt 21 and the second latch bolt 22 both have an active end which is composed of a locking surface parallel to the telescopic direction of the latch bolt assembly 2 and an inclined surface extending at an angle to the locking surface in the locked position, and the inclined surfaces of the first latch bolt 21 and the second latch bolt 22 are arranged in opposite directions to the left and right.

[0063] The limiting assembly 3 is arranged between the mounting frame 1 and the latch bolt assembly 2, and the limiting assembly 3 includes a first limiting protrusion 11 as a first limiting part, a second limiting protrusion 14 as a second limiting part, a reversing member and an adjusting mechanism. The first limiting protrusion 11 is fixedly arranged on a side wall formed by the mounting end of the latch bolt frame 111 on one side of the latch bolt shaft 23, and a first avoidance recess 12 is arranged in parallel with the first limiting protrusion 11 on the side wall formed by the mounting end of the latch bolt frame 111. The second limiting protrusion 14 is fixedly arranged on a side wall formed by the matching plate 112 on the other side of the latch bolt shaft 23, and a second avoidance recess 13 is arranged in parallel with the second limiting protrusion 14 on the side wall formed by the matching plate 112. The first limiting protrusion 11 and the second avoidance recess 13 are opposite to each other, and the first avoidance recess 12 and the second limiting protrusion 14 are opposite to each other on the mounting frame 1 perpendicular to the locking and unlocking direction. The first oblique tongue 21 corresponds to the first limiting protrusion 11 and the second avoiding recess 13, and the second oblique tongue 22 corresponds to the second limiting protrusion 14 and the first avoiding recess 12. The reversing member is a reversing plate 31 movably arranged between the first limiting position and the second limiting position in the installation space 15 formed between the inner wall of the matching plate 112 and the inner wall of the installation end of the oblique tongue frame 111. Figure 2 and Figure 4As shown, the adjustment mechanism includes mounting holes respectively arranged on the inclined tongue frame 111 and the matching plate 112, and a screw 32 as a driving member which is suitable for selectively passing through one of the mounting holes and being threadedly connected to the reversing plate 31. The rotation axis of the screw 32 is perpendicular to the locking and unlocking direction of the mounting frame 1 and the axis of the inclined tongue shaft 23. The reversing plate 31 is provided with a threaded hole threadedly matched with the screw 32. The screw 32 selectively passes through one of the mounting holes on the two side walls and rotates in cooperation with the threaded hole to drive the reversing plate 31 threadedly matched with it to approach the side wall where the mounting hole through which the screw 32 passes on the mounting frame 1 is located. Optionally, the driving member can also be replaced by a bolt, which is not limited in this embodiment.

[0064] When installing the latch mechanism of this embodiment on the door leaf, Figure 4 As shown, select from Figure 4 The screw 32 passes through the mounting hole on the corresponding side wall in the direction of the solid line graphic or the direction of the dotted line graphic.

[0065] See also Figure 5a and Figure 5b As shown, when the screw rod of the screw 32 extends from the mounting hole on the tongue bracket 111 into the mounting space 15, the screw 32 is rotated to extend into the threaded hole of the reversing plate 31 and is threadedly connected with the reversing plate 31, and the screw 32 is continuously rotated to drive the reversing plate 31 to move toward the side close to the tongue bracket 111 until the reversing plate 31 is locked in the first limit position. When the reversing plate 31 moves to the first limit position, as shown in FIG. Figure 5a and Figure 5b As shown, the reversing plate 31 is close to the first avoidance recess 12 and cooperates with the second limiting protrusion 14 to abut against the second oblique tongue 22 to limit the second oblique tongue 22 from rotating between the locked position and the unlocked position. Figure 5a As shown, at this time, the second latch bolt 22 is in a locked state and cannot rotate around the latch bolt shaft 23; at the same time, as Figure 5b As shown, one side of the connection end of the first inclined tongue 21 is limited by the reversing plate 31 and the first limiting protrusion 11, and the other side of the connection end of the first inclined tongue 21 is the second avoidance recess 13 corresponding thereto. At this time, the first inclined tongue 21 is in a released state and can be rotated counterclockwise from its locked position to the unlocked position. In this way, in the process of closing the door leaf, Figure 7a and Figure 7b As shown, the active end of the first latch bolt 21 encounters the door frame 100, and since the second avoidance recess 13 corresponding to the other side of the connection end of the first latch bolt 21 is in a released state, it can rotate counterclockwise around the latch bolt shaft 23 from the locked position to the unlocked position, that is, the first latch bolt 21 is in a follow-up state, as shown in FIG. Figure 7bAs shown, the inclined surface of the second inclined bolt 22 at the action end acts on the door frame 100, and the inclined surface of the second inclined bolt 22 pushes the inclined bolt mechanism to overcome the biasing force tending to the lock-out position, and moves in the lock-in direction, and the first inclined bolt 21 and the second inclined bolt 22 encounter the lock hole in the door frame 100 and the biasing force tending to the lock-out position, and pops out in the lock-out direction, thus completing the locking process. After locking, since the second inclined bolt 22 is blocked by the second limiting protrusion 14 and constrained by the reversing plate 31, the second inclined bolt 22 is stuck in the lock hole in the door frame 100, and the second inclined bolt 22 and the lock hole wall on the door opening side of the door frame 100 are in a self-locking relationship, so that the inclined bolt assembly 2 cannot move in the lock-in direction, and the door leaf cannot be opened from the door frame. The unlocking process is the same as the ordinary inclined bolt door lock, and the inclined bolt mechanism is driven to move in the lock-in direction by twisting the key or the handle to complete the unlocking process.

[0066] See also Figures 6a to 6c As shown, when the screw rod of the screw 32 extends from the mounting hole on the matching plate 112 into the mounting space 15, the screw 32 is rotated to extend into the threaded hole of the reversing plate 31 and is threadedly connected with the reversing plate 31, and the screw 32 is continuously rotated to drive the reversing plate 31 to move toward the side close to the matching plate 112 until the reversing plate 31 is locked in the second limit position. When the reversing plate 31 moves to the second limit position, as shown in FIG. Figures 6a to 6c As shown, the reversing plate 31 is close to the second avoidance recess 13 and cooperates with the first limiting protrusion 11 to resist against the first oblique tongue 21 to limit the first oblique tongue 21 from rotating between the locked position and the unlocked position. Figure 6c As shown, at this time, the first latch bolt 21 is in a locked state and cannot rotate around the latch bolt shaft 23; at the same time, as Figure 6a and Figure 6b As shown, one side of the connection end of the second oblique tongue 22 is jointly restricted by the reversing plate 31 and the second limiting protrusion 14, and the other side of the connection end of the second oblique tongue 22 is the first avoidance recess 12 corresponding thereto. At this time, the second oblique tongue 22 is in a released state and can be rotated clockwise from its locked position to an unlocked position. The process of opening and closing the door lock at this time is as described above, except that the first oblique tongue 21 is locked at this time, and the second oblique tongue 22 is in a released state due to no obstruction at the first avoidance recess 12. During operation, the second oblique tongue 22 can rotate around the oblique tongue shaft 23 without playing a locking role. The first oblique tongue 21 is blocked by the first limiting protrusion 11 and constrained by the reversing plate 31, so that the first oblique tongue 21 is stuck in the lock hole in the door frame 100, so that the door leaf cannot be opened from the door frame 100.

[0067] In this way, the limiting assembly 3 can adjust the position of the reversing plate 31 relative to the side edges of the tails of the first oblique tongue 21 and the second oblique tongue 22 by adjusting the screw 32 to achieve a first limiting state of releasing the first oblique tongue 21 and locking the second oblique tongue 22 or a second limiting state of locking the first oblique tongue 21 and releasing the second oblique tongue 22, thereby realizing the switching of the first oblique tongue 21 and the second oblique tongue 22 between the locked state and the released state, thereby realizing the rapid change of the opening direction of the oblique tongue.

[0068] In the above embodiment, it is also possible to Figure 7a and Figure 7b As shown, the connecting ends of the first inclined tongue 21 and the second inclined tongue 22 are both provided with a boss 211 suitable for abutting and cooperating with the end of the lock body panel 200. When the inclined tongue in the released state rotates from the unlocking position to the locking position under the action of the lock hole wall of the door frame 100, the boss 211 can abut against the lock body panel 200 and drive the mounting frame 1 to move in the locking direction. Figure 7b The direction indicated by the arrow is the locking direction.

[0069] Preferably, the bosses 211 are arranged on both sides of the connecting end of the inclined tongue. When the mounting bracket 1 is located at the locked position, the bosses 211 can abut against the end of the lock body panel 200 to prevent the mounting bracket 1 from escaping from the lock housing.

[0070] In this embodiment, when the door leaf is closed, the end of the boss 211 on one side of the first latch bolt 21 can be against the lock body panel 200 during the rotation of the first latch bolt 21 when it collides with the door frame 100, and the end of the boss 211 on the side is used as a fulcrum. As the first latch bolt 21 rotates, a torsion force with the fulcrum as the axis is applied to the latch bolt shaft 23, and the torsion force drives the mounting frame 1 to move in the locking direction, that is, the mounting frame 1 moves to the locked position, thereby driving the latch bolt mechanism as a whole to retract into the lock housing. In this way, the collision of the first latch bolt 21 with the door frame 100 can be transformed into a movement of the latch bolt retracting into the lock body, so that the latch bolt retracts into the lock body more smoothly and can reduce noise. After the door leaf is closed, the mounting frame 1 moves in the locking direction under the biasing force tending to the locking position, driving the latch bolt assembly 2 to extend out of the lock housing as a whole. At this time, the action end of the second latch bolt 22 is locked in the locking position by the limiting assembly 3, and the second latch bolt 22 and the lock hole wall on the door opening side of the door frame 100 are in a self-locking relationship, so that the latch bolt assembly 2 cannot move in the locking direction. At this time, the first latch bolt 21 rotates in the opposite direction and returns to the locking position under the abutment and cooperation between the boss 211 set at the connecting end and the lock body panel 200. In this way, since the same side of the inclined surface of the first latch bolt 21 and the second latch bolt 22 is perpendicular to the locking direction, at this time, the first latch bolt 21 acts as an anti-insertion latch, and the second latch bolt 22 acts as a main latch bolt.

[0071] In this embodiment, the first latch bolt 21 can be rotated forward from its locked position to the unlocked position in the released state, and can be rotated in the reverse direction to return to the locked position; the second latch bolt 22 can be rotated in the reverse direction from its locked position to the unlocked position in the released state, and can be rotated forward to return to its locked position. It should be noted that in this embodiment, "forward" refers to Figures 5a to 7b The direction of rotation is counterclockwise. "Reverse" means Figures 5a to 7b Clockwise rotation direction.

[0072] The inclined bolt mechanism in this embodiment is provided with a first inclined bolt 21 and a second inclined bolt 22, so that the inclined bolt mechanism and the door lock using the same have the functions of both anti-theft and reducing door closing noise; in addition, the limit assembly 3 can be used to limit the rotation of one of the two inclined bolts and allow the other inclined bolt to rotate between the locked position and the unlocked position. By adjusting the limit assembly 3, it can be switched between the first limit state and the second limit state. When the inclined bolt mechanism needs to be reversed, it only needs to adjust the limit assembly 3 to the first limit state or the second limit state, without rotating the entire inclined bolt mechanism 180° in the lock body. Not only is the reversal convenient and easy to operate, but it can also avoid the need to provide a larger hollow hole on the lock body for the inclined bolt mechanism to rotate, thereby improving the airtightness of the lock body and reducing the possibility of impurities such as iron filings and wood chips penetrating into the hollow space of the lock body. At the same time, the strength of the lock body can be improved and the service life of the lock body can be extended.

[0073] like Figure 2 and Figure 3 In the illustrated embodiment, the mounting end of the inclined tongue frame 111 is in a U-shaped structure, the matching plate 112 is arranged opposite to the bottom edge of the U-shaped mounting end, and is installed and connected by at least one connecting member 16, and the first limiting protrusion 11 and the first avoidance recess 12 are formed on the bottom edge of the U-shaped mounting end. Optionally, one end of the inclined tongue shaft 23 is rotatably connected to one side of the U-shaped mounting end, and the other end of the inclined tongue shaft 23 is rotatably installed on the opposite other side.

[0074] In this embodiment, positioning steps 1111 are respectively provided on the opposite sides of the U-shaped mounting end, and positioning and matching steps 1121 for matching and limiting with the positioning steps 1111 are relatively provided on the matching plate 112. In this way, the matching plate 112 is spliced ​​and installed on the two sides of the U-shaped mounting end through the positioning and matching steps 1121, and the matching plate 112 and the oblique tongue bracket 111 can be installed by matching the installation of the connecting member 16, and the installation positioning can be reliable, which can prevent the connection between the matching plate 112 and the oblique tongue bracket 111 from loosening, thereby reducing the number of maintenance times of the mounting frame 1.

[0075] The connecting member 16 is located in the installation space 15 and its central axis is perpendicular to the locking direction of the mounting frame 1 and the axis of the oblique tongue shaft 23. One end of the connecting member 16 is installed on the matching plate 112, and the other end is installed on the side wall formed by the mounting end of the oblique tongue frame 111 on the opposite side of the matching plate 112; optionally, the middle position of the connecting member 16 is smoothly set, and the reversing plate 31 is provided with a guide groove for the connecting member 16 to pass through. The reversing plate 31 slides with the connecting member 16 through the guide groove thereon, and the connecting member 16 can provide guidance for the reversing plate 31 to move between the first limit position and the second limit position. Preferably, the connecting member 16 is set to two, of course, the connecting member 16 can also be set to one or more, and this embodiment does not limit this. Optionally, the connecting member 16 can be a rivet; optionally, the connecting member 16 can also be a stud, and both ends are respectively provided with external threads for threaded connection to the matching plate 112 and the mounting end of the oblique tongue frame 111.

[0076] like Figures 8 to 9 In the embodiment shown, the oblique tongue mechanism in this embodiment is the same as the rest of the structure of the embodiment 1, except that, in this embodiment, the mounting frame 1 is not provided with a matching plate 112, and the mounting end of the mounting frame 1 includes a first side wall 121 formed with a first limiting protrusion 11 and a first avoidance recess 12, and a second side wall 122 formed with a second limiting protrusion 14, the second side wall 122 is a bending wall integrally bent on the first side wall 121, and a mounting space 15 is formed between the bending wall and the first side wall 121; the second avoidance recess 13 is an avoidance space formed by a gap located on one side of the second side wall 122. The first side wall 121 of the mounting frame 1 is provided with a mounting hole for the screw 32 to pass through, and one end of the screw rod of the screw 32 can be sequentially passed through the threaded hole on the reversing plate 31 and the mounting hole on the first side wall 121, and then rotatably mounted on the mounting frame 1 with the retaining ring 33 at the rear end of the mounting hole.

[0077] The position adjustment principle of the reversing plate 31 in this embodiment is as follows: rotating the screw 32 in the first direction can drive the reversing plate 31 threadedly connected thereto to move toward the second side wall 122, and the reversing plate 31 and the first limiting protrusion 11 cooperate to abut against the first oblique tongue 21 to limit the rotation of the first oblique tongue 21, while the second oblique tongue 22 is in a released state; similarly, rotating the screw 32 in the second direction opposite to the first direction can drive the reversing plate 31 threadedly connected thereto to move toward the first side wall 121, so that the first oblique tongue 21 is in a released state and the second oblique tongue 22 is in a locked state. The position of the reversing plate 31 relative to the side edge of the tail of the first oblique tongue 21 and the second oblique tongue 22 is adjusted by adjusting the screw 32, so as to realize the switching between the locked state and the released state of the first oblique tongue 21 and the second oblique tongue 22, thereby realizing the rapid change of the opening direction of the oblique tongue.

[0078] This embodiment can achieve the above Figures 1 to 7bThe beneficial effects that can be achieved by the illustrated embodiment will not be described in detail in this embodiment.

[0079] The present invention further provides a door lock, which includes a lock housing and a latch bolt mechanism of any one of the aforementioned embodiments, wherein a mounting frame 1 of the latch bolt mechanism can be movably mounted in the lock housing between a locked position and a locked-out position and is subjected to a biasing force tending toward the locked-out position; the handle and the lock core are both linked and cooperated with the latch bolt mechanism.

[0080] The door lock provided by the present invention includes the aforementioned oblique bolt mechanism, wherein the technical advantages and effects achieved by the door lock also include the technical advantages and effects achieved by the oblique bolt mechanism, which will not be repeated here.

[0081] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, the obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A latch bolt mechanism, characterized in that: include: A mounting frame (1) adapted to be movably mounted in the lock housing between a locked position and a locked out position and subjected to a biasing force tending toward the locked out position; The latch assembly (2) comprises a first latch (21) and a second latch (22) which are pivotally connected to the mounting frame (1) near the end of the lock body panel (200) and can rotate around an axis extending parallel to the side edge of the fan body between a locked position and an unlocked position; the first latch (21) and the second latch (22) both have an active end composed of a locking surface parallel to the extension direction of the latch assembly (2) and an inclined surface extending at an angle to the locking surface in the locked position; the inclined surfaces of the first latch (21) and the second latch (22) are arranged in opposite directions to the left and right; A limit assembly (3) is arranged between the mounting frame (1) and the latch bolt assembly (2); the limit assembly (3) can be adjusted to reach a first limit state in which the first latch bolt (21) is released and the second latch bolt (22) is locked, or a second limit state in which the first latch bolt (21) is locked and the second latch bolt (22) is released; the active end of the latch bolt in the released state can rotate under the action of the lock hole wall of the door frame (100); the active end of the latch bolt in the locked state is locked in a locked position, and a self-locking relationship is formed between the active end of the latch bolt and the lock hole wall on the door opening side of the door frame (100), so that the latch bolt assembly (2) cannot move in the locking direction.

2. The latch mechanism according to claim 1, characterized in that: The first inclined tongue (21) and the second inclined tongue (22) are rotatably pivoted to the mounting end of the mounting frame (1) close to the end of the lock body panel (200) via an inclined tongue shaft (23); The first oblique tongue (21) and the second oblique tongue (22) are arranged vertically along the oblique tongue axis (23).

3. The latch bolt mechanism according to claim 2, characterized in that: The limiting component (3) comprises: A first limiting portion, arranged on the mounting frame (1) and used to limit the first inclined tongue (21) from rotating toward one side; A second limiting portion, arranged on the mounting frame (1) and used to limit the second inclined tongue (22) from rotating toward an opposite side; A reversing member is movably arranged on the mounting frame (1) between a first limit position and a second limit position, and abuts against the first oblique tongue (21) and the second oblique tongue (22), restricting the second oblique tongue (22) from rotating toward the other side at the first limit position, and restricting the first oblique tongue (21) from rotating toward the other side at the second limit position; An adjustment mechanism is arranged between the mounting frame (1) and the switching member, and is used to move the switching member and lock the switching member at a first limit position or a second limit position.

4. The latch bolt mechanism according to claim 3, characterized in that: The mounting end of the mounting frame (1) has two side walls which are arranged opposite to each other in an inner and outer direction, the inclined tongue shaft (23) is located between the two side walls, the first limiting portion is a first limiting protrusion (11) on one side wall of the mounting frame (1) corresponding to the first inclined tongue (21), and the side wall is a first avoidance recess (12) corresponding to the second inclined tongue (22); the second limiting portion is a second limiting protrusion (14) on the other side wall of the mounting frame (1) corresponding to the second inclined tongue (22), and the side wall is a second avoidance recess (13) corresponding to the first inclined tongue (21).

5. The latch bolt mechanism according to claim 4, characterized in that: The reversing member is a reversing plate (31) movably arranged in the installation space (15) between the two side walls of the installation frame (1); in a first limiting position, the reversing plate (31) is close to the first avoidance recess (12) and cooperates with the second limiting protrusion (14) to abut against the second oblique tongue (22), so as to limit the second oblique tongue (22) from rotating between the locked position and the unlocked position; in a second limiting position, the reversing plate (31) is close to the second avoidance recess (13) and cooperates with the first limiting protrusion (11) to abut against the first oblique tongue (21), so as to limit the first oblique tongue (21) from rotating between the locked position and the unlocked position; The adjustment mechanism comprises a driving member mounted on the mounting frame (1) and threadedly connected to the reversing plate (31), wherein the driving member drives the reversing plate (31) to move between a first limit position and a second limit position by rotating.

6. The latch bolt mechanism according to claim 5, characterized in that: The driving member is a screw (32), and the reversing plate (31) is provided with a threaded hole that cooperates with the screw (32).

7. The latch bolt mechanism according to claim 5 or 6, characterized in that: The mounting frame (1) is composed of an inclined tongue frame (111) and a matching plate (112), wherein the matching plate (112) is correspondingly mounted and connected to the mounting end of the inclined tongue frame (111); The first limiting protrusion (11) and the first avoiding recess (12) are formed on the side wall formed by the mounting end of the inclined tongue frame (111), and the second avoiding recess (13) and the second limiting protrusion (14) are formed on the side wall formed by the matching plate (112); The installation space (15) for installing the reversing plate (31) is formed between the inner wall of the matching plate (112) and the inner wall of the installation end of the inclined tongue frame (111); the inclined tongue shaft (23) is installed on the inclined tongue frame (111).

8. The latch bolt mechanism according to claim 7, characterized in that: The oblique tongue frame (111) and the matching plate (112) are correspondingly provided with mounting holes for the screw (32) to pass through. The screw rod of the screw (32) can extend from one mounting hole into the mounting space (15) to be connected with the reversing plate (31), and the reversing plate (31) threadedly matched with the screw (32) can be driven to move toward a side close to the nut by the rotation of the screw (32).

9. The latch bolt mechanism according to claim 5 or 6, characterized in that: The mounting end of the mounting frame (1) comprises a first side wall (121) formed with a first limiting protrusion (11) and a first avoiding recess (12), and a second side wall (122) formed with the second limiting protrusion (14), the second side wall (122) being a bent wall integrally bent on the first side wall (121), and the mounting space (15) is formed between the bent wall and the first side wall (121); The second avoidance recess (13) is an avoidance space located on one side of the second side wall (122).

10. The latch bolt mechanism according to claim 9, characterized in that: The first side wall (121) of the mounting frame (1) is provided with a mounting hole for a screw (32) to pass through; one end of the screw rod of the screw (32) can pass through the threaded hole on the reversing plate (31) and the mounting hole on the first side wall (121) in sequence, and then be rotatably mounted on the mounting frame (1) together with a retaining spring (33) at the rear end of the mounting hole.

11. The latch bolt mechanism according to any one of claims 1 to 6, characterized in that: The connecting ends of the first inclined tongue (21) and the second inclined tongue (22) are both provided with a boss (211) suitable for abutting and cooperating with the end of the lock body panel (200); when the inclined tongue in a released state rotates from an unlocking position to an upward locking position under the action of the lock hole wall of the door frame (100), the boss (211) can abut against the lock body panel (200) and drive the mounting frame (1) to move in the locking direction.

12. A door lock, characterized in that: The invention comprises a lock housing and a latch bolt mechanism according to any one of claims 1 to 11, wherein the mounting frame (1) is movably mounted in the lock housing between a locked position and a locked-out position and is subjected to a biasing force tending to the locked-out position; The handle and the lock core are both linked and coordinated with the oblique bolt mechanism.

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