Lock tongue silent mechanism

Abstract

The present invention relates to the technical field of locks, and provides a locking tongue silencing mechanism comprising: a shell having an accommodating cavity, a sliding portion slidably arranged in the accommodating cavity, a tongue portion arranged on the sliding portion and capable of extending out of the accommodating cavity, a strip hole provided on the sliding portion and extending along the expansion and contraction direction of the tongue portion, a positioning rod arranged on the inner wall of the accommodating cavity and passing through the strip hole, and an elastic sleeve sleeved on the positioning rod; the inner wall of the strip hole has a first stop wall and a second stop wall respectively located on the moving path of the elastic sleeve. When the sliding portion is sliding, when the side wall of the elastic sleeve abuts against the first stop wall, collision and sound are avoided; when the sliding portion is sliding, when the side wall of the elastic sleeve abuts against the second stop wall, collision and sound are avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of locks, and more specifically, relates to a lock tongue silencing mechanism. Background Art

[0002] Locks are widely used in modern life. Locks are usually set on door bodies. Existing locks usually have a housing with a cavity. The lock tongue extends from the tongue hole on the housing into the lock hole of the door frame (or the lock tongue retracts from the lock hole of the door frame) to lock the door. However, the main tongue (main tongue: the cross section is usually rectangular) is prone to produce impact noise during the extension and retraction process. Summary of the invention

[0003] The object of the present invention is to provide a locking tongue silencing mechanism to solve the technical problem in the prior art that the locking tongue is prone to generate impact noise.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a lock tongue silencing mechanism including: a shell having an accommodating cavity, a sliding portion slidably arranged in the accommodating cavity, a tongue portion arranged on the sliding portion and capable of extending out of the accommodating cavity, a strip hole opened on the sliding portion and extending along the telescopic direction of the tongue portion, a positioning rod arranged on the inner wall of the accommodating cavity and passing through the strip hole, and an elastic sleeve sleeved on the positioning rod; the inner wall of the strip hole has a first stop wall and a second stop wall respectively located on the moving path of the elastic sleeve.

[0005] Furthermore, an annular flange is formed on the inner wall of the strip hole; a limiting sleeve is sleeved on the positioning rod; the elastic sleeve and the limiting sleeve are spaced apart, and the annular flange is clamped between the elastic sleeve and the limiting sleeve.

[0006] Furthermore, it also includes a positioning cylinder which is sleeved on the rod body and located between the elastic sleeve and the limiting cylinder, and the positioning cylinder is located on the inner side of the annular flange.

[0007] Furthermore, the positioning cylinder and the limiting cylinder are an integrally formed part;

[0008] And / or the end surface of the positioning cylinder and the end surface of the elastic sleeve abut against each other.

[0009] Furthermore, the elastic sleeve is an integral piece made of rubber material.

[0010] Furthermore, the elastic sleeve is convexly arranged outside the strip-shaped hole.

[0011] Further, the first stop wall is a first concave surface, and the first concave surface is concave toward the elastic sleeve; and / or the second stop wall is a second concave surface, and the second concave surface is concave toward the elastic sleeve.

[0012] Further, the central area of ​​the first concave surface protrudes toward the inner side of the strip-shaped hole to form a first plane, and / or the central area of ​​the first concave surface protrudes toward the inner side of the strip-shaped hole to form a first plane.

[0013] Furthermore, a first convex rib is provided on the sliding portion on one side of the strip hole, and a second convex rib is provided on the sliding portion on the other side of the strip hole; and the extension directions of the first convex rib and the second convex rib are respectively the same as the extension direction of the strip hole.

[0014] Furthermore, a positioning hole is opened on the inner wall of one side of the accommodating cavity; a boss inserted into the positioning hole is arranged on one end face of the positioning rod, and the other end face of the positioning rod is detachably fixed to the inner wall of the other side of the accommodating cavity by a fastener.

[0015] The beneficial effects of the lock tongue silent mechanism provided by the present invention are as follows: compared with the prior art, the lock tongue silent mechanism provided by the present invention has a sliding portion that is slidably arranged in the accommodating cavity, a tongue portion that is arranged on the sliding portion and slides with the sliding portion; the tongue portion can be switched between an extended position and a retracted position; when the tongue portion is in the extended position, it can cooperate with the lock hole on the door frame; when the tongue portion is in the retracted position, it can be pulled out of the lock hole on the door frame; a strip hole is provided on the sliding portion, the extension direction of the strip hole is the same as the sliding direction of the sliding portion, a positioning rod is passed through the strip hole, so that when the sliding portion is sliding, the positioning rod can prevent the sliding portion from shifting during the sliding process; an elastic sleeve is sleeved on the positioning rod; when the sliding portion is sliding, when the side wall of the elastic sleeve abuts against the first stop wall, the impact and sound are avoided; when the sliding portion is sliding, when the side wall of the elastic sleeve abuts against the second stop wall, the impact and sound are avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 Schematic diagram of the three-dimensional installation of the tongue provided in an embodiment of the present invention Figure 1 ;

[0018] Figure 2 Schematic diagram of the three-dimensional installation of the tongue provided in an embodiment of the present invention Figure 2 ;

[0019] Figure 3 Schematic diagram of the three-dimensional installation of the tongue provided in an embodiment of the present invention Figure 3 ;

[0020] Figure 4 A schematic diagram of the installation of a first tongue and a second tongue provided in an embodiment of the present invention;

[0021] Figure 5 Schematic diagram of the three-dimensional installation of the first tongue provided in an embodiment of the present invention Figure 1 ;

[0022] Figure 6 Schematic diagram of the three-dimensional installation of the first tongue provided in an embodiment of the present invention Figure 2 ;

[0023] Figure 7 Schematic diagram of the three-dimensional installation of the second tongue provided in an embodiment of the present invention Figure 1 ;

[0024] Figure 8 Schematic diagram of the three-dimensional installation of the second tongue provided in an embodiment of the present invention Figure 2 ;

[0025] Fig. 9 Schematic diagram of the three-dimensional installation of the second tongue provided in an embodiment of the present invention Figure 3 .

[0026] Among them, the reference numerals in the figure are:

[0027] 1-shell; 11-accommodating cavity; 21-first tongue; 211-guide strip; 2111-first surface; 2112-second surface; 212-first pivot; 2131-first abutting portion; 2132-second abutting portion; 214-slot; 2151-first inclined surface; 2152-second inclined surface; 216-bayonet; 22-first sliding member; 221-boss; 231-rotation limiting platform; 232-second pivot; 233-stopping member; 234-elastic member; 235-waiting lever; 24-elastic body; 25-rotation lever; 251-third pivot; 31-second tongue; 311-stopping portion; 3111-first abutting surface; 3112-second abutting surface; 32-second sliding member; 321-limiting portion; 33-elastic plate; 34-reinforcement plate; 351-stop plate; 3511-slide groove; 352-positioning plate; 3521-through hole; 36-columnar spring; 37-fourth pivot; 41-tongue; 42-sliding portion; 421-strip hole; 4211-first concave surface; 4212-first plane; 4213-second concave surface; 4214-second plane; 422-annular flange; 43-positioning rod; 44-elastic sleeve; 45-limiting sleeve; 46-positioning cylinder; 471-first convex rib; 472-second convex rib; 481-sliding rod; 482-sliding groove; 51-lock cylinder; 511-first convex portion; 52-rotating cylinder; 521-first arc groove; 522-second arc groove; 523-sliding portion; 53-gear. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0030] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] Please also read Figures 1 to 3 The locking tongue silencing mechanism provided by the present invention is now described. The locking tongue silencing mechanism comprises: a housing 1 having an accommodating cavity 11, a sliding portion 42 slidably disposed in the accommodating cavity 11, a tongue portion 41 disposed on the sliding portion 42 and capable of extending out of the accommodating cavity 11, a strip hole 421 provided on the sliding portion 42 and extending along the extension direction of the tongue portion 41, a positioning rod 43 disposed on the inner wall of the accommodating cavity 11 and passing through the strip hole 421, and an elastic sleeve 44 sleeved on the positioning rod 43; the inner wall of the strip hole 421 has a first stop wall and a second stop wall respectively located on the moving path of the elastic sleeve 44.

[0033] In this way, the sliding portion 42 is slidably arranged in the accommodating cavity 11, and the tongue portion 41 is arranged on the sliding portion 42 and slides with the sliding portion 42; the tongue portion 41 can switch between the extended position and the retracted position; when the tongue portion 41 is in the extended position, it can cooperate with the lock hole on the door frame; when the tongue portion 41 is in the retracted position, it can be drawn out from the lock hole on the door frame; a strip hole 421 is opened on the sliding portion 42, and the extension direction of the strip hole 421 is the same as the sliding direction of the sliding portion 42, and a positioning rod 43 is penetrated in the strip hole 421, so that when the sliding portion 42 slides, the positioning rod 43 can prevent the sliding portion 42 from deviating during the sliding process; an elastic sleeve 44 is sleeved on the positioning rod 43; when the sliding portion 42 slides, when the side wall of the elastic sleeve 44 abuts against the first stop wall, the impact sound is avoided; when the sliding portion 42 slides, when the side wall of the elastic sleeve 44 abuts against the second stop wall, the impact sound is avoided.

[0034] Specifically, in one embodiment, the strip-shaped holes 421 extend in a straight direction.

[0035] Specifically, in one embodiment, when the tongue 41 reaches the extended position, the elastic sleeve 44 abuts against the first stop wall.

[0036] Specifically, in one embodiment, when the tongue portion 41 reaches the retracted position, the elastic sleeve 44 abuts against the second stop wall.

[0037] Specifically, in one embodiment, the sliding portion 42 slides along a straight line.

[0038] Specifically, in one embodiment, the outer diameter of the elastic sleeve 44 is smaller than the width of the strip-shaped hole 421 , thereby reducing the friction between the elastic sleeve 44 and the inner wall of the strip-shaped hole 421 .

[0039] For further information, see Figures 1 to 3 As a specific embodiment of the locking tongue silencing mechanism provided by the present invention, an annular flange 422 is formed on the inner wall of the strip hole 421; a limiting sleeve 45 is sleeved on the positioning rod 43; the elastic sleeve and the limiting sleeve 45 are spaced apart, and the annular flange 422 is clamped between the elastic sleeve and the limiting sleeve 45. In this way, during the sliding process of the sliding part 42, the annular flange 422 is limited between the elastic sleeve 44 and the limiting sleeve 45, reducing the shaking / vibration of the sliding part 42 in the extending direction of the positioning rod 43; the inner wall of the strip hole 421 on one side of the annular flange 422 contacts the elastic sleeve 44 to reduce friction, and the inner wall of the strip hole 421 on the other side of the annular flange 422 contacts the limiting sleeve 45 to reduce friction.

[0040] For further information, see Figures 1 to 3 As a specific embodiment of the locking tongue silencing mechanism provided by the present invention, it also includes a positioning cylinder 46 which is sleeved on the rod body and located between the elastic sleeve 44 and the limiting cylinder, and the positioning cylinder 46 is located inside the annular flange 422. In this way, the existence of the limiting cylinder can maintain the spacing between the elastic sleeve 44 and the positioning cylinder 46, and reduce the direct squeezing / collision of the annular flange 422 by the elastic sleeve 44 and the positioning cylinder 46; the positioning rod 43 is separated from the annular flange 422 by the positioning cylinder 46, and the annular flange 422 is prevented from scratching the positioning rod 43.

[0041] For further information, see Figures 1 to 3 As a specific embodiment of the locking tongue silencing mechanism provided by the present invention, the positioning cylinder 46 and the limiting cylinder are integrally formed; and / or the end surface of the positioning cylinder 46 abuts against the end surface of the elastic sleeve 44. In this way, the relative position between the positioning cylinder 46 and the limiting cylinder is more secure; the end surfaces of the positioning cylinder 46 and the elastic sleeve 44 fit together, and the contact between the positioning cylinder 46 and the elastic sleeve 44 is more intimate.

[0042] For further information, see Figures 1 to 3 As a specific embodiment of the locking tongue silencing mechanism provided by the present invention, the elastic sleeve 44 is an integral piece made of rubber material. In this way, the rubber has good elasticity and is easy to manufacture.

[0043] For further information, see Figures 1 to 3As a specific embodiment of the locking tongue silent mechanism provided by the present invention, the elastic sleeve 44 is convexly arranged outside the strip hole 421. In this way, the elastic sleeve 44 is convexly arranged outside the strip hole 421, so that the elastic sleeve 44 forms a space outside the sliding part 42, thereby reducing the collision between the sliding part 42 and the housing 1.

[0044] For further information, see Figures 1 to 3 As a specific implementation of the lock tongue silencing mechanism provided by the present invention, the first stop wall is a first concave surface 4211, and the first concave surface 4211 is concave toward the elastic sleeve 44; and / or the second stop wall is a second concave surface 4213, and the second concave surface 4213 is concave toward the elastic sleeve 44. In this way, when the outer wall of the elastic sleeve 44 contacts the first concave surface 4211, the first concave surface 4211 and the outer side wall of the elastic sleeve 44 abut against each other, and the first concave surface 4211 is wrapped around the outer side wall of the elastic sleeve 44, thereby ensuring the contact between the first concave surface 4211 and the elastic sleeve 44, and the first concave surface 4211 concave toward the elastic sleeve 44 can prevent the elastic sleeve 44 from sliding sideways during the contact with the elastic sleeve 44; when the outer wall of the elastic sleeve 44 contacts the second concave surface 4213, the second concave surface 4213 and the outer side wall of the elastic sleeve 44 abut against each other, and the second concave surface 4213 is wrapped around the outer side wall of the elastic sleeve 44, thereby ensuring the contact between the second concave surface 4213 and the elastic sleeve 44, and the second concave surface 4213 concave toward the elastic sleeve 44 can prevent the elastic sleeve 44 from sliding sideways during the contact with the elastic sleeve 44.

[0045] For further information, see Figures 1 to 3 As a specific embodiment of the locking tongue silencing mechanism provided by the present invention, the central area of ​​the first concave surface 4211 protrudes toward the inner side of the strip hole 421 to form a first plane 4212, and / or the central area of ​​the first concave surface 4211 protrudes toward the inner side of the strip hole 421 to form a first plane 4212. In this way, when the elastic sleeve 44 moves toward the first concave surface 4211 and contacts the first concave surface 4211, when the elastic sleeve 44 contacts the first plane 4212 in the central area of ​​the first concave surface 4211, the first plane 4212 can enhance the braking effect on the elastic sleeve 44; when the elastic sleeve 44 moves toward the second concave surface 4213 and contacts the second concave surface 4213, when the elastic sleeve 44 contacts the second plane 4214 in the central area of ​​the second concave surface 4213, the second plane 4214 can enhance the braking effect on the elastic sleeve 44.

[0046] For further information, see Figures 1 to 3As a specific embodiment of the locking tongue silencing mechanism provided by the present invention, a first rib 471 is provided on the sliding portion 42 on one side of the strip hole 421, and a second rib 472 is provided on the sliding portion 42 on the other side of the strip hole 421; the extension directions of the first rib 471 and the second rib 472 are respectively the same as the extension direction of the strip hole 421. In this way, the first rib 471 and the second rib 472 can protect the elastic sleeve 44 located between the first rib 471 and the second rib 472, and prevent the elastic sleeve 44 from being affected when the shell 1 is deformed; in addition, the extension directions of the first rib 471 and the second rib 472 are the same as the extension direction of the strip hole 421, so that the first rib 471 and the second rib 472 can play a guiding role during the sliding of the sliding portion 42.

[0047] For further information, see Figures 1 to 3 As a specific embodiment of the locking tongue silencing mechanism provided by the present invention, a positioning hole is provided on the inner wall of one side of the accommodating chamber 11; a boss 221 inserted into the positioning hole is provided on one end face of the positioning rod 43, and the other end face of the positioning rod 43 is detachably fixed to the inner wall of the other side of the accommodating chamber 11 by a fastener. In this way, it is very convenient to separate the positioning rod 43, and only needs to separate the positioning rod 43 from the inner wall of the accommodating chamber 11 by the fastener, and then remove the positioning rod 43 from the positioning hole on the inner wall of the accommodating chamber 11, which is very convenient.

[0048] Specifically, in one embodiment, the extension and retraction of the tongue 41 is controlled by the lock core 51 , and when the lock core 51 rotates, the tongue 41 moves in an extended and retracted manner.

[0049] Specifically, in one embodiment, it further includes a toggle rod 481 pivotally connected to the inner wall of the accommodating cavity 11 and transmission-connected to the lock core, the extension direction of the toggle rod 481 is perpendicular to the rotation axis of the toggle rod 481; the sliding portion 42 is provided with a toggle groove 482 recessed in a direction perpendicular to the sliding of the sliding portion 42, and one end of the toggle rod 481 is inserted into the toggle groove 482. During the rotation of the toggle rod 481, the toggle rod 481 inserted into the toggle groove 482 can push the sliding portion 42 to move.

[0050] For further information, see Figures 4 to 6 As a specific embodiment of the lock tongue silencing mechanism provided by the present invention, it also includes: a shell 1 with an accommodating cavity 11, a first sliding member 22 slidably arranged in the accommodating cavity 11, and a first tongue body 21 arranged on the first sliding member 22 and can extend out of the accommodating cavity 11; a guide strip 211 is arranged on the surface of the first tongue body 21, and the guide strip 211 has a guide surface protruding from the outside of the first tongue body 21 and used to contact the door frame when closing the door; in the extending direction of the first tongue body 21, the end of the guide surface is smoothly connected to the surface of the first tongue body 21.

[0051] In this way, during the sliding process of the first sliding member 22, the first sliding member 22 drives the first tongue 21 to extend and retract; the tongue can switch between an extended position and a retracted position; when the first tongue 21 is in the extended position, it can cooperate with the lock hole on the door frame; when the first tongue 21 is in the retracted position, it can be pulled out from the lock hole on the door frame; a guide strip 211 is provided on the surface of the first tongue 21, and during the contact between the door frame and the guide strip 211, the contact area between the door frame and the first tongue 21 can be reduced, the friction force can be reduced, and the generation of noise can be reduced; in addition, in the extending direction of the first tongue 21, when the door frame slides from the surface of the first tongue 21 to the guide strip 211, the door frame and the guide strip 211 are prevented from colliding with each other, thereby reducing noise.

[0052] The oblique tongue is a locking tongue having an inclined surface which is arranged obliquely with respect to the extension and retraction direction of the first tongue body 21 .

[0053] Optionally, in one embodiment, the guide surface has a first surface 2111; in the extension direction of the first tongue 21, the distance between the first surface 2111 and the surface of the first tongue 21 gradually decreases. In this way, when the first tongue 21 is extended and inserted into the lock hole of the door frame, the guide surface gradually contacts the door frame more closely.

[0054] Optionally, in one embodiment, a slot 214 is provided on the surface of the first tongue 21, and the guide bar 211 is locked in the slot 214. In this way, the guide bar 211 is locked in the slot 214 more firmly.

[0055] Optionally, in one embodiment, the guide strip 211 is an integral piece formed by plastic injection molding. In this way, the integral piece made of plastic is not easy to generate noise when rubbing and bumping.

[0056] Optionally, in one embodiment, there are multiple guide bars 211, and the multiple guide bars 211 are arranged in parallel. In this way, when the multiple guide bars 211 are in contact with the door frame, the multiple guide bars 211 can share the friction force they are subjected to.

[0057] Optionally, in one embodiment, the first tongue 21 is pivotally connected to the first sliding member 22 via the first pivot 212; the first tongue 21 has a first abutting portion 2131 and a second abutting portion 2132 for abutting against the inner wall of the accommodating cavity 11; the first abutting portion 2131 and the second abutting portion 2132 are respectively located on opposite sides of the first pivot 212. In this way, after the first abutting portion 2131 and the second abutting portion 2132 abut against the inner wall of the accommodating cavity 11, since the first abutting portion 2131 and the second abutting portion 2132 are respectively located on opposite sides of the first pivot 212, the first tongue 21 is not easy to rotate relative to the first sliding member 22.

[0058] Optionally, in one embodiment, a slot 214 is provided on the first tongue 21, one end of the first sliding member 22 has a boss 221 inserted into the slot 214, and the first pivot 212 is passed through the boss 221. In this way, the shaking between the first sliding member 22 and the first tongue 21 can be reduced through the cooperation between the boss 221 and the slot 214.

[0059] Optionally, in one embodiment, the first tongue 21 has a first inclined surface 2151 and a second inclined surface 2152 at a predetermined angle; the axis of the first pivot 212 is located on the bisector of the predetermined angle; and guide strips 211 are respectively provided on the first inclined surface 2151 and the second inclined surface 2152. In this way, the first inclined surface 2151 and the second inclined surface 2152 can both cooperate with the lock hole on the door frame, and the first inclined surface 2151 and the second inclined surface 2152 are respectively provided with guide strips 211, and the guide strips 211 can reduce noise when the first inclined surface 2151 or the second inclined surface 2152 cooperates with the lock hole.

[0060] Optionally, in one embodiment, the guide surface further has a second curved surface 2112; the second surface 2112 is disposed around the outer side of the first pivot 212. In this way, when the first tongue 21 rotates around the first pivot 212, objects in contact with the first surface 2111 (such as the inner wall of the lock hole of the door frame) are not easily scratched.

[0061] Optionally, in one embodiment, the invention further comprises: a bayonet 216 formed on the first sliding member 22 and recessed in a direction perpendicular to the sliding path of the first sliding member 22, a rotation limiter 231 pivotally connected to the inner wall of the accommodating chamber 11 through a second pivot 232 and connected to the lock cylinder 51 in a transmission manner, a stopper 233 disposed on the rotation limiter 231 and used for snapping in / sliding out of the bayonet 216, and an elastic member 234 connecting the rotation limiter 231 and the housing 1 and driving the rotation limiter 231 to rotate so that the stopper 233 snaps into the bayonet 216. In this way, the rotation limiter 231 is pivotally connected to the inner wall of the accommodating chamber 11, and the lock cylinder 51 can drive the rotation limiter 231 to rotate when rotating. During the rotation of the rotation limiter 231, the stopper 233 on the rotation limiter 231 snaps into the bayonet 216 on the first sliding member 22 to prevent the first sliding member 22 from retracting, thereby positioning the first sliding member 22.

[0062] Specifically, in one embodiment, when the stopper 233 is inserted into the slot 216 , the first sliding member 22 is located at the extended position.

[0063] Specifically, in one embodiment, the elastic member 234 is a coil spring sleeved on the second pivot 232, one end of the elastic member 234 is connected to the inner wall of the accommodating chamber 11, and the other end of the elastic member 234 is connected to the waiting lever 235 of the rotation limit platform 231. In the absence of external force, the elastic member 234 pushes the rotation limit platform 231 to rotate so that the stopper 233 is clamped into the clamping hole 216 on the first sliding member 22.

[0064] Specifically, in one embodiment, an elastic body 24 is further included; the elastic body 24 is a coil spring sleeved on the positioning pin (wherein the positioning pin is fixed on the housing 1), one end of the elastic body 24 is connected to the inner wall of the accommodating cavity 11, and the other end of the elastic body 24 is clamped in the clamping groove 214 on the first tongue 21. In the absence of external force, the elastic body 24 pushes the first tongue 21 to and keeps it in the extended position.

[0065] For further information, see Figures 7 to 9As a specific embodiment of the locking tongue silencing mechanism provided by the present invention, a rotating rod 25 pivotally connected to the inner wall of the accommodating chamber 11 by a second pivot 232, a second sliding member 32 slidably arranged in the accommodating chamber 11, a second tongue 31 arranged on the second sliding member 32 and capable of extending out of the accommodating chamber 11, a stopper 311 arranged on the first tongue 21 and having a first abutting surface 3111, and an elastic plate 33 laid and fixed on the inner wall of the accommodating chamber 11; the second tongue 31 switches between an extended position and a retracted position; when the first tongue 21 is in the extended position, the first abutting surface 3111 abuts against the elastic plate 33; when the second tongue 31 is in the extended position, the second sliding member 32 drives the rotating limit platform 231 to rotate through the rotating rod 25 to allow the stopper 233 to slide out of the bayonet 216. In this way, the rotation limit platform 231 is pivotally connected to the inner wall of the accommodating chamber 11, and the rotation of the lock cylinder 51 can drive the rotation limit platform 231 to rotate. During the rotation of the rotation limit platform 231, the stopper 233 on the rotation limit platform 231 is inserted into the bayonet 216 on the first sliding member 22 to prevent the first sliding member 22 from retracting, thereby positioning the first sliding member 22; during the movement of the second tongue 31 from the retracted position to the extended position, the second sliding member 32 pushes one end of the rotating rod 25 to rotate the rotating rod 25, and the other end of the rotating rod 25 pushes the rotation limit platform 231 to rotate when rotating so that the stopper 233 slides out of the bayonet 216, thereby releasing the positioning of the first sliding member 22 by the stopper 233; during the movement of the second tongue 31 from the extended position to the retracted position, the second sliding member 32 no longer pushes the rotating rod 25 One end, so that the other end of the rotating rod 25 releases the driving force on the rotating limit platform 231, and the rotating limit platform 231, driven by the elastic member 234, snaps the stop member 233 into the slot 216 to position the first sliding member 22; in addition, during the sliding process of the second sliding member 32, the second sliding member 32 drives the second tongue 31 to move telescopically; the tongue can switch between the extended position and the retracted position; when the first tongue is in the extended position, it can cooperate with the lock hole on the door frame; when the first tongue is in the retracted position, it can be drawn out from the lock hole on the door frame; a stop portion 311 is provided on the second tongue 31, and the stop portion 311 has a first abutting surface 3111, and an elastic plate 33 is laid on the inner wall of the container; when the second tongue 31 is in the extended position, the first abutting surface 3111 abuts against the elastic plate 33 for buffering to reduce noise.

[0066] Specifically, in one embodiment, the rotating rod 25 is pivotally connected to the housing 1 via a third pivot 251 .

[0067] Specifically, in one embodiment, a rotating cylinder 52 is sleeved on the outer side of the lock core 51, and a first arc-shaped groove 521 extending around the circumferential direction of the rotating cylinder 52 is provided on the inner wall of the rotating cylinder 52, and a first convex portion 511 is provided on the outer wall of the lock core 51, which is inserted into the first arc-shaped groove 521 and can slide along the first arc-shaped groove 521. In this way, when the lock core 51 rotates, the lock core 51 drives the first convex portion 511 to slide along the first arc-shaped groove 521, and when the first convex portion 511 reaches the end of the first arc-shaped groove 521 and continues to rotate, it can drive the rotating cylinder 52 to rotate.

[0068] Specifically, in one embodiment, a toggle portion 523 is provided on the outer wall of the rotating drum 52 . When the rotating drum 52 rotates, the rotating drum 52 drives the rotation limit platform 231 to rotate through the toggle portion 523 .

[0069] Specifically, in one embodiment, the outer wall of the rotating drum 52 is provided with a second arc-shaped groove 522 extending in the circumferential direction of the rotating drum 52, and the lock core 51 is sleeved with a gear 53, and the gear 53 is provided with a second convex portion that is inserted into the second arc-shaped groove 522 and can slide along the second arc-shaped groove 522. In this way, when the gear 53 rotates, the gear 53 drives the second convex portion to slide along the second arc-shaped groove 522, and when the second convex portion reaches the end of the second arc-shaped groove 522 and continues to rotate, it can drive the rotating drum 52 to rotate.

[0070] Specifically, in one embodiment, the gear 53 is drivingly connected to the motor.

[0071] Specifically, in one embodiment, a to-be-shifted rod 235 is disposed on the rotation limit platform 231 , and the second protrusion drives the rotation limit platform 231 to rotate by shifting the to-be-shifted rod 235 .

[0072] Specifically, in one embodiment, the stopper 311 further has a second abutting surface 3112, and the first abutting surface 3111 and the second abutting surface 3112 are arranged at intervals; when the second tongue 31 is in the extended position, the second abutting surface 3112 abuts against the elastic plate 33. In this way, when the second tongue 31 is in the extended position, the first abutting surface 3111 and the second abutting surface 3112 both abut against the elastic plate 33, and the first abutting surface 3111 and the second abutting surface 3112 can share the impact force, and the first abutting surface 3111 and the second abutting surface 3112 are arranged at intervals, which is conducive to maintaining the stability of the second tongue 31.

[0073] Specifically, in one embodiment, the second tongue 31 is pivotally connected to the second sliding member 32 via the fourth pivot 37; in a direction perpendicular to the moving path of the second sliding member 32, the first abutting surface 3111 and the second abutting surface 3112 are respectively located on opposite sides of the pivot. In this way, after the second tongue 31 rotates around the pivot, the second tongue 31 can quickly return to the abutting state of the first abutting surface 3111 and the second abutting surface 3112.

[0074] Specifically, in one embodiment, the second sliding member 32 moves along a predetermined straight line; a plane passing through the axis of the fourth pivot 37 and parallel to the predetermined straight line is set as a predetermined plane; the first abutting surface 3111 and the second abutting surface 3112 are symmetrically arranged on opposite sides of the predetermined plane. In this way, after the first abutting surface 3111 and the second abutting surface 3112 abut against the elastic plate 33, the second tongue 31 is not easy to rotate around the pivot.

[0075] Specifically, in one embodiment, the elastic plate 33 is a rubber plate, which has good elasticity and low cost.

[0076] Specifically, in one embodiment, the second tongue 31 is pivotally connected to the second sliding member 32 via a fourth pivot 37 .

[0077] Specifically, in one embodiment, a reinforcing plate 34 is further included which is fixed on the inner wall of the accommodating cavity 11, and the reinforcing plate 34 is fixedly connected to the elastic plate 33. In this way, the reinforcing plate 34 is connected to the elastic plate 33, which can effectively position the elastic plate 33 and reduce the movement of the elastic plate 33.

[0078] Specifically, in one embodiment, the reinforcing plate 34 is laid on the inner wall of the accommodating cavity 11 to enhance the tightness between the reinforcing plate 34 and the inner wall of the accommodating cavity 11. Specifically, in one embodiment, the reinforcing plate 34 is glued to the inner wall of the accommodating cavity 11.

[0079] Specifically, in one embodiment, the reinforcing plate 34 is disposed perpendicularly to the elastic plate 33. In this way, the reinforcing plate 34 can reduce loosening / flagging in the thickness direction of the reinforcing plate 34.

[0080] Specifically, in one embodiment, the stopper 311 is a U-shaped member, and the first abutting surface 3111 and the second abutting surface 3112 are the two end surfaces of the U-shaped member. In this way, the U-shaped stopper 311 can have stronger anti-bending and anti-deformation capabilities, and the first abutting surface 3111 and the second abutting surface 3112 are the two end surfaces of the U-shaped member, so that when the first abutting surface 3111 and the second abutting surface 3112 are impacted onto the elastic plate 33, the relative position between the first abutting surface 3111 and the second abutting surface 3112 can remain stable.

[0081] Specifically, in one embodiment, a stop plate 351 is arranged on the inner wall of the accommodating cavity 11 and has a sliding groove 3511, a positioning plate 352 is detachably fixed on the stop plate 351 and has a through hole 3521, a columnar spring 36 is sleeved on the second sliding member 32, and a limiting portion 321 is arranged on the second sliding member 32 between the stop plate 351 and the second tongue 31; the second sliding member 32 is slidably arranged in the sliding groove 3511 and penetrated into the through hole 3521; one end of the columnar spring 36 abuts against the limiting portion 321, and the other end of the columnar spring 36 abuts against the positioning plate 352. In this way, the second sliding member 32 is slidably arranged in the stop plate 351 on the positioning plate 352, and the stop plate 351 is fixed on the inner wall of the accommodating chamber 11, so that the direction of the second sliding member 32 is more stable during the sliding process; the second sliding member 32 is inserted into the through hole 3521 of the positioning plate 352, thereby reducing the vibration / shaking of the second sliding member 32 during the sliding process; when the second tongue 31 retracts under the action of external force, the columnar spring 36 is compressed, and when the external force is removed, the columnar spring 36 pushes the second tongue 31 to extend, and the columnar spring 36 is sleeved on the second sliding member 32 to prevent the columnar spring 36 from separating from the second sliding member 32.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Lock tongue silent mechanism, It is characterized in that include: A shell having an accommodating cavity, a sliding portion slidably arranged in the accommodating cavity, a tongue portion arranged on the sliding portion and capable of extending out of the accommodating cavity, a strip hole opened on the sliding portion and extending along the extension direction of the tongue portion, a positioning rod arranged on the inner wall of the accommodating cavity and inserted into the strip hole, an elastic sleeve sleeved on the positioning rod, a first sliding member slidably arranged in the accommodating cavity, and a first tongue body arranged on the first sliding member and capable of extending out of the accommodating cavity; the inner wall of the strip hole has a first stop wall and a second stop wall respectively located on the moving path of the elastic sleeve; a guide strip is arranged on the surface of the first tongue body, the guide strip has a guide surface protruding from the outer side of the first tongue body and used to contact the door frame when closing the door; in the extension direction of the first tongue body, the end of the guide surface is smoothly connected to the surface of the first tongue body; the guide surface has a first surface; in the extension direction of the first tongue body, the distance between the first surface and the surface of the first tongue body gradually decreases; a clamping groove is arranged on the surface of the first tongue body, and the guide strip is clamped in the clamping groove; The first tongue is pivotally connected to the first sliding member through a first pivot; the first tongue has a first inclined surface and a second inclined surface with a predetermined angle; the first pivot axis is located on the bisector of the predetermined angle; the first inclined surface and the second inclined surface are respectively provided with the guide strip; the guide surface also has a second surface with an arc surface; the second surface is arranged around the outer side of the first pivot; It also includes: a bayonet formed on the first sliding member and recessed in a direction perpendicular to the sliding path of the first sliding member, a rotation limit platform pivotally connected to the inner wall of the accommodating cavity through a second pivot and connected to the lock cylinder for transmission, a stopper provided on the rotation limit platform and used for snapping in / sliding out of the bayonet, and an elastic member connecting the rotation limit platform and the shell and driving the rotation limit platform to rotate so that the stopper is snapped into the bayonet.

2. The locking tongue silencing mechanism according to claim 1, It is characterized in that An annular flange is formed on the inner wall of the strip hole; a limiting sleeve is sleeved on the positioning rod; the elastic sleeve and the limiting sleeve are spaced apart, and the annular flange is clamped between the elastic sleeve and the limiting sleeve.

3. The locking tongue silencing mechanism according to claim 2, It is characterized in that It also includes a positioning cylinder which is sleeved on the rod body and located between the elastic sleeve and the limiting cylinder, and the positioning cylinder is located on the inner side of the annular flange.

4. The locking tongue silencing mechanism according to claim 3, It is characterized in that The positioning cylinder and the limiting cylinder are an integrally formed part; And / or the end surface of the positioning cylinder and the end surface of the elastic sleeve abut against each other.

5. The locking tongue silencing mechanism according to claim 1, It is characterized in that The elastic sleeve is an integral piece made of rubber material.

6. The locking tongue silencing mechanism according to claim 1, It is characterized in that The elastic sleeve is convexly arranged on the outside of the strip-shaped hole.

7. The locking tongue silencing mechanism according to claim 1, It is characterized in that The first stop wall is a first concave surface, which is concave toward the elastic sleeve; and / or the second stop wall is a second concave surface, which is concave toward the elastic sleeve.

8. The locking tongue silencing mechanism according to claim 7, It is characterized in that The central area of ​​the first concave surface protrudes toward the inner side of the strip-shaped hole to form a first plane, and / or the central area of ​​the first concave surface protrudes toward the inner side of the strip-shaped hole to form a first plane.

9. The locking tongue silencing mechanism according to claim 1, It is characterized in that A first convex rib is arranged on the sliding part on one side of the strip hole, and a second convex rib is arranged on the sliding part on the other side of the strip hole; the extension directions of the first convex rib and the second convex rib are respectively the same as the extension direction of the strip hole.

10. The locking tongue silencing mechanism according to claim 1, It is characterized in that A positioning hole is provided on the inner wall of one side of the accommodating cavity; a boss inserted into the positioning hole is provided on one end face of the positioning rod, and the other end face of the positioning rod is detachably fixed to the inner wall of the other side of the accommodating cavity by a fastener.

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