A flip-type single-tongue lock body and a lock for a push-pull door lock

Abstract

The present invention relates to the technical field of lock bodies, and in particular to a reversible single-tongue lock body and a lock for a sliding door lock, comprising: a fixed plate, which is installed with the door body; a lock tongue, which is driven by a linkage assembly to be flipped and slidably installed relative to the fixed plate so as to close the door when the lock tongue is flipped and extended out of the fixed plate, and to open the door when the lock tongue is flipped and retracted into the fixed plate; the linkage assembly comprises: a shell, which is fixedly installed relative to the fixed plate; a sliding assembly, which is located inside the shell and is slidably arranged relative to the shell, the sliding assembly is installed in contact with the lock tongue and is provided with a guide mechanism for guiding the flipping of the lock tongue, the sliding assembly is pushed by a lever linked with a handle so as to realize the movement of the sliding assembly along the extension and retraction route of the lock tongue, and an avoidance space is generated when the sliding assembly moves backward, and the avoidance space is used for the lock tongue to flip and retract under the external force of the door frame, so as to solve the technical problems in the prior art that the single-tongue lock body cannot be applied to sliding doors and the lock body itself has a large operating noise.

Description

Technical Field

[0001] The invention relates to the technical field of lock bodies, in particular to a reversible single-tongue lock body and a lock for a push-pull door lock. Background Art

[0002] Push-pull door locks are unlocked and locked by pushing and pulling. Since the unlocking and locking actions only require pushing or pulling, the unlocking method is easy to operate, convenient and fast, so it is more and more widely used. Single-tongue lock bodies are widely used because of their simple hole installation and low labor costs. The lock body structure of conventional push-pull door locks occupies a large longitudinal space, so push-pull door locks cannot be used in single-tongue lock bodies, because the installation space allowed by single-tongue lock bodies is relatively limited, mainly slender installation space, that is, the horizontal space along the movement of the lock tongue when opening and closing, and there is not much space in the longitudinal space for the drive structure of the lock body to be installed, so the single-tongue lock bodies in conventional technology all adopt a rotary door lock structure, but the rotary door lock needs to be rotated when in use, and is not as convenient to use as the push-pull door lock.

[0003] The prior art discloses a door lock named as an independent double single-tongue lock body, and the utility model patent with the announcement number CN222228240U discloses that an oblique-tongue single-tongue lock body is provided between the inner door handle and the outer door handle, and the oblique-tongue single-tongue lock body can be unlocked by rotating the inner door handle and the outer door handle. A square-tongue single-tongue lock body is provided between the locking knob and the lock core, and the square-tongue single-tongue lock body can be locked or unlocked by rotating the locking knob and the lock core. The patent discloses a technical solution of driving the lock body to unlock and lock by rotating the handle, and also represents the rotation driving method of the traditional single-tongue lock body in the conventional technology.

[0004] The prior art also discloses a utility model patent named "A sliding door lock structure" with a publication number of CN210164345U, which includes a handle, a front seat, a rear seat and a lock body. The lock body includes a lock body outer lining, a box cover, a box bottom assembly, a lock tongue assembly, a tilted tongue assembly, a push-pull assembly and a locking assembly. The tilted tongue assembly of the patent adopts a rack and pinion meshing transmission method, which has the advantages of good noise reduction effect, smooth transmission, and convenient and quick door opening.

[0005] However, related technologies including the above-mentioned technical solutions still have many problems such as: ① The lock body of the push-pull door lock requires a large longitudinal installation space, which cannot be integrated with the slender installation space of the conventional single-tongue lock body; ② The telescopic method of the conventional lock body when unlocking and locking requires the lock tongue to be completely retracted into the door body when unlocking, which takes a long time to unlock and the lock body occupies a large lateral space; ③ When the lock body is unlocked and locked, the noise generated between the lock tongue and the door frame and the operation of the lock body itself is relatively large. Summary of the invention

[0006] The object of the present invention is to provide a reversible single-tongue lock body and lock for a push-pull door lock, so as to solve the technical problems in the prior art that the single-tongue lock body cannot be applied to a push-pull door lock and the lock body itself has a large operating noise.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A reversible single-tongue lock body for a push-pull door lock, comprising:

[0009] A fixing plate, the fixing plate being mounted on the door body;

[0010] The lock tongue is driven by the linkage assembly to flip and slide relative to the fixed plate so as to close the door when it flips and extends out of the fixed plate, and open the door when it flips and retracts into the fixed plate;

[0011] Linkage components include:

[0012] The housing is fixedly installed relative to the fixing plate;

[0013] The sliding assembly is located inside the shell and is arranged to slide relative to the shell. The sliding assembly is installed in contact with the lock tongue and is provided with a guide mechanism for guiding the lock tongue to flip. The sliding assembly is pushed by a lever linked to the handle to realize the movement of the sliding assembly along the extension and retraction route of the lock tongue. When the sliding assembly moves backward, an avoidance space is generated, and the avoidance space is used for the lock tongue to flip and retract under the external force of the door frame.

[0014] Furthermore, the sliding assembly includes:

[0015] A sliding enclosure, which is arranged inside the housing and is slidably mounted relative to the housing, a first elastic member is installed between the housing and an end of the sliding enclosure away from the lock tongue, and the first elastic member is used to generate a pre-tightening force on the sliding enclosure to reset the sliding enclosure along the direction of the lock tongue;

[0016] A top block, one side of which is in contact with the lock tongue and the other side of which is connected to the linkage block, and an elastic member is installed between the top block and the sliding enclosure to generate a pre-tightening force on the top block to reset it along the direction of the lock tongue;

[0017] A paddle plate is installed to slide relative to the sliding enclosure plate, and its sliding direction forms an angle α with the telescopic direction of the lock tongue. One end of the paddle plate is connected to the linkage block through a linkage plate, and the linkage block and the paddle plate are all rotatably and slidably connected to the linkage plate. The linkage plate is provided with a long hole, and a rotating shaft is provided on the linkage block. The rotating shaft on the linkage block and one end of the paddle plate are both slidably installed in the long hole of the linkage plate.

[0018] Furthermore, the top block includes a top head, a connecting rod and a connecting block connected to the linkage block, the connecting rod connects the top head and the connecting block, a guiding arc surface is provided on a side of the top head facing the lock tongue, an inwardly concave clamping angle is provided below the guiding arc surface, and the clamping angle is clamped with a clamping platform at the rear end of the lock tongue to limit the flipping of the lock tongue when it contacts the lock tongue.

[0019] Furthermore, the sliding enclosure includes a top plate and a bottom plate arranged in parallel and a side plate connecting the top plate and the bottom plate. Two through holes opened along the extension and retraction direction of the lock tongue are arranged on the top plate. One through hole is used to provide a guide for the reciprocating sliding of the boss of the top block, and the other through hole is used to provide a guide for the reciprocating sliding of the linkage block. A baffle is installed between the top plate and the bottom plate, and the elastic member on the top block is a second elastic member mounted on the connecting rod and located between the top head and the baffle.

[0020] Furthermore, the shift plate is a plate body with convex shafts respectively arranged at both ends, the shift plate includes a first shift plate and a second shift plate arranged in parallel, a plurality of sliding holes are arranged on the top plate and the bottom plate, the angle between the axis of the sliding hole and the extension and retraction direction of the lock tongue is an acute angle, the linkage plate includes a first linkage plate and a second linkage plate, the convex shafts at both ends of the first shift plate and the second shift plate are respectively slidably installed in the sliding holes, and the convex shafts at one end of the first shift plate and the second shift plate close to the lock tongue are respectively slidably installed in the long strip holes of the first linkage plate and the second linkage plate.

[0021] Furthermore, the guide mechanism includes a guide hole arranged on the side plate and a fixed axis and a rotating axis installed on the lock tongue. The side plate is installed on the top plate and the bottom plate at one end close to the lock tongue and is rotatably connected to the fixed axis of the lock tongue. When the lock tongue is subjected to external force, its rotating axis slides along the guide hole with the fixed axis as the center, thereby driving the lock tongue to flip.

[0022] Furthermore, the sliding enclosure is provided with a plurality of wear-resistant protrusions protruding from the surface of the sliding enclosure, and the wear-resistant protrusions are formed by stamping the sliding enclosure in one piece.

[0023] Furthermore, the angle of the tongue end of the lock tongue is γ, and a silencer is embedded on the tongue end, and the silencer is arranged as a V-shaped structure. The tongue end and the card table are connected by a guide arc surface, and the guide arc surface contacts the guide arc surface of the top block in the unlocked state. When the silencer is installed on the lock tongue, the angles between its two sides and the tongue end are β and the vertical distance between the corner of the silencer and the tongue end surface is the largest. The vertical distance is set to m, and the distance between the tongue end and the fixed plate in the locked state of the lock tongue is N, wherein 30°≤γ≤60°, 1.5°≤β≤3°, 0.45mm≤m≤0.75mm, N≥10mm, the width of the silencer is L, and the width of the lock tongue is H, wherein 2.5L≤H≤4.5L.

[0024] Furthermore, corresponding positions of the shell, top plate and bottom plate are provided with shift holes extending along the extension and retraction direction of the lock tongue, and the shift hole is used for allowing the shift rod to pass through and enter between the first shift plate and the second shift plate, so that the shift rod can push the shift plate when it moves in a direction perpendicular to the extension and retraction direction of the lock tongue to complete the unlocking action.

[0025] A lock comprises the above-mentioned flip-type single-tongue lock body for a push-pull door lock, and also comprises two handles, a limit rod is installed between the two handles, and the limit rod is used to cooperate with the limit hole of the lock body shell when the lock body is installed on the door body to achieve limited installation of the lock body. The two handles are respectively equipped with a lever, and the lever is used to link with the lever plate when the handle is pushed and pulled to drive the lock body to flip and extend the lock tongue and flip and retract it.

[0026] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0027] (1) The present invention provides a linkage component and a sliding component to achieve the avoidance of the lock tongue during unlocking, so that the lock tongue can flip and retract under the action of external force, thereby achieving the unlocking action. Different from the solution in which the lock tongue can only be extended and retracted in the traditional unlocking structure, the present invention can achieve the flipping and retracting action of the lock tongue in a limited space, not only does not require a large longitudinal installation space, but also reduces the lateral installation space of the lock body. At the same time, the flipping and retracting action is faster than the conventional retracting action, thereby shortening the unlocking time.

[0028] (2) The present invention sets a specific structure of a sliding enclosure, a top block and a pull plate. When the pull rod is driven by the handle to push the pull plate in a direction perpendicular to the extension and retraction direction of the lock tongue, the first pull plate and the second pull plate move away from each other along the sliding holes on the bottom plate and the top plate, and then the linkage block is pulled to move away from the lock tongue with the help of the linkage plate. At this time, the top block is simultaneously displaced in a direction away from the lock tongue, the second elastic member is compressed, the top block is separated from the lock tongue, and the lock tongue is flipped under the action of the external force of the door frame so that the lock tongue enters the fixed plate. Under the action of the second elastic member, the sliding enclosure is displaced in a direction away from the lock tongue, thereby realizing the displacement of the lock tongue and realizing the unlocking action. The structural design is compact and does not belong to a complex mechanical structure. It not only realizes the unlocking action of the push-pull door lock in a slender installation space, but also saves the cost of the lock body.

[0029] (3) The present invention greatly reduces the friction between the lock body and the door frame during unlocking and locking by installing a silencer on the lock tongue and limiting the size and angle of the silencer, while combining the wear-resistant protrusions on the sliding panel. It also guides the movement of the lock body, reduces the noise generated by friction and the impact on the life of the lock body, thereby increasing the service life of the lock body and reducing the noise in the lock body application environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1It is a three-dimensional structural schematic diagram of the lock of the present invention;

[0031] Figure 2 It is a schematic diagram of the three-dimensional structure of the lock body of the present invention;

[0032] Figure 3 It is a schematic diagram of the internal three-dimensional structure of the lock body of the present invention;

[0033] Figure 4 It is a schematic diagram of the internal top view of the lock body of the present invention;

[0034] Figure 5 It is a schematic diagram of the three-dimensional structure of the lock body without the housing of the present invention;

[0035] Figure 6 It is a schematic diagram of the three-dimensional structure of the lock body without a slide plate of the present invention;

[0036] Figure 7 It is a front view structural schematic diagram of the lock body without a slide plate of the present invention;

[0037] Figure 8 Schematic diagram of the three-dimensional structure of the top block;

[0038] Fig. 9 It is a schematic diagram of the three-dimensional structure of the lock tongue.

[0039] In the figure, 100 is a handle; 101 is a lever; 102 is a limit lever;

[0040] 200, lock body; 201, lock tongue; 2011, muffler; 2012, fixed axis; 2013, rotating axis; 2014, slot; 2015, slot hole; 2016, slot table; 2017, guide arc surface; 2018, tongue end; 202, housing; 2021, limit hole; 2022, dial hole; 203, top block; 2031, top head; 20311, boss; 20312, guide arc surface; 20313, slot angle; 20 32. connecting rod; 2033. connecting block; 204. top plate; 2041. side plate; 20411. guide hole; 205. linkage block; 206. first shift plate; 2061. first linkage plate; 207. second shift plate; 2071. second linkage plate; 208. first elastic member; 209. bottom plate; 2091. sliding hole; 210. second elastic member; 211. baffle plate; 212. fixing plate; 213. cam shaft; 214. wear-resistant protrusion. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0042] The drawings are for illustrative purposes only and should not be construed as limiting the present patent;

[0043] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present application. The singular forms "a", "the" and "the" used in the embodiments of the present application and the appended claims are not intended to limit the embodiments of the present application.

[0044] "The" is also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

[0045] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0046] In the description of this application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] In addition, in the description of the present application, unless otherwise specified, "plurality" means two or more. "and / or",

[0048] Describing the association relationship of associated objects, it means that there can be three kinds of relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0049] In order to solve the limitations of the prior art, this embodiment provides a technical solution, and the technical solution of the present invention is further described below in conjunction with the drawings and embodiments.

[0050] The present invention is mainly aimed at the traditional single-tongue lock body 200, which can only be driven by a rotary handle. However, the rotary handle is not as convenient as a push-pull door lock when in use. The lock body of a traditional push-pull door lock occupies a large horizontal space and a large vertical space, which makes the push-pull door lock unable to be applied to the single-tongue lock body 200. The vertical space is defined as: the direction perpendicular to the extension and retraction direction of the lock tongue 201, and the horizontal space is defined as the direction same as the extension and retraction direction of the lock tongue 201. In order to break through this technical barrier, the present invention designs the following technical solution.

[0051] See attached Figure 2 A reversible single-tongue lock body 200 for a push-pull door lock includes: a fixing plate 212, the fixing plate 212 is installed with the door body, the fixing plate 212 is mainly used to install the lock body 200 on the door body, and the installation method can be detachably installed by screws. It can be understood that a through hole is set on the fixing plate 212, and the through hole is used to provide avoidance for the reversal and extension of the lock tongue 201;

[0052] The lock tongue 201 is driven by the linkage assembly to flip and slide relative to the fixed plate 212 so that the door can be closed when it flips and extends out of the fixed plate 212, and the door can be opened when it flips and retracts into the fixed plate 212. Figure 6-9The lock tongue 201 includes a V-shaped tongue end 2018 at the front end and a clamping platform 2016 at the rear end. The angle of the tongue end 2018 of the lock tongue 201 is γ. The silencer 2011 is embedded on the tongue end 2018. The silencer 2011 is set as a V-shaped structure. A V-shaped card groove 2014 is set on the tongue end 2018, and a card hole 2015 is set in the card groove 2014. The silencer 2011 is made of POM plastic material (POM is also called polyoxymethylene, which has high strength and rigidity, good elasticity, and good wear resistance). Columns are set at both ends of the silencer 2011 for clamping in the card hole 2015 in the card groove 2014 to achieve the embedding of the silencer 2011. The tongue end 2018 and the clamping platform 2016 are connected by a guide arc surface 2017. The guide arc surface 2017 is connected to the guide arc surface 2017. When the arc surface 2017 is in the unlocked state, it contacts the guide arc surface 20312 of the top block 203. When the muffler 2011 is installed on the lock tongue 201, the angles between its two sides and the tongue end 2018 are β, and the vertical distance between the corner of the muffler 2011 and the two surfaces of the tongue end 2018 is the largest. The vertical distance is set to m. When the lock tongue 201 is in the locked state, the distance between the tongue end 2018 and the fixed plate 212 is N, wherein 30°≤γ≤60°, 1.5°≤β≤3°, 0.45mm≤m≤0.75mm, N≥10mm, the width of the muffler 2011 is L, and the width of the lock tongue 201 is H, wherein 2.5L≤H≤4.5L, the best, γ=45°, β=2°, m=0.5mm, N=12mm, H=3.5L, at this time, it can ensure the pressure-bearing capacity of the lock tongue 201 and the pressure-bearing capacity when locked, and at the same time ensure the wear resistance of the silencer 2011 and the control of noise. When H>4.5L, the wear resistance and anti-noise ability of the lock tongue 201 are insufficient. When H<2.5L, the pressure-bearing capacity of the lock tongue 201 will be greatly reduced, resulting in a significant reduction in the service life of the lock tongue 201.

[0053] See attached Figure 1-7, a linkage component includes: a shell 202, which is fixedly installed relative to a fixed plate 212. Here, the shell 202 is installed in a split-type card-mounted or other combined manner, and is convenient to install, disassemble and maintain, and is easy to process; a sliding component, which is located inside the shell 202 and is slidably arranged relative to the shell 202. The sliding component is installed in contact with the lock tongue 201 and is provided with a guide mechanism for guiding the flipping of the lock tongue 201. The sliding component is pushed by a lever 101 linked to the handle 100 to realize the movement of the sliding component along the extension and retraction route of the lock tongue 201. When the sliding component moves backward, an avoidance space is generated, and the avoidance space is provided for the lock tongue 201 to flip and retract under the external force of the door frame. Specifically, the sliding assembly includes: a sliding enclosure, the sliding enclosure is provided with a plurality of wear-resistant protrusions 214 protruding from the surface of the sliding enclosure, the wear-resistant protrusions 214 are formed by stamping the sliding enclosure, the sliding enclosure is arranged inside the shell 202 and is installed relative to the shell 202 for sliding, a first elastic member 208 is installed between the end of the sliding enclosure away from the lock tongue 201 and the shell 202, the first elastic member 208 is used to generate a pre-tightening force for the sliding enclosure to reset it along the direction of the lock tongue 201, and the first elastic member 208 is a spring. The sliding enclosure includes a top plate 204 and a bottom plate arranged in parallel. 209 and a side plate 2041 connecting the top plate 204 and the bottom plate 209, the two sides of the side plate 2041 are respectively installed vertically with the top plate 204 and the bottom plate 209, and a plurality of side plates 2041 are used here to realize the relative fixed installation between the top plate 204 and the bottom plate 209. The top plate 204 is provided with two through holes opened along the telescopic direction of the lock tongue 201, one through hole is used to provide a guide for the reciprocating sliding of the boss 20311 of the top block 203, and the other through hole is used to provide a guide for the reciprocating sliding of the linkage block 205. Specifically, a round table is provided on the linkage block 205, and the round table reciprocates along the through hole. Figure 6 In the embodiment, a baffle 211 is installed between the top plate 204 and the bottom plate 209. Here, the baffle 211 is vertically installed between the top plate 204 and the bottom plate 209. It can be installed by plugging or other methods. The elastic member on the top block 203 is a second elastic member 210 that is sleeved on the connecting rod 2032 and is located between the top head 2031 and the baffle 211. Here, the second elastic member 210 is a spring that is sleeved on the connecting rod 2032, and one end of the spring is pressed against the top head 2031, and the other end is pressed against the connecting block 2033. For details, see the attached Figure 8, one side of the top block 203 is installed in contact with the lock tongue 201, and the other side is connected to the linkage block 205. A first elastic member 208 is installed between the top block 203 and the sliding enclosure to generate a pre-tightening force for the top block 203 to reset it along the direction of the lock tongue 201. Specifically, the top block 203 includes a top head 2031, a connecting rod 2032 and a connecting block 2033 connected to the linkage block 205. The connecting rod 2032 connects the top head 2031 and the connecting block 2033. A guide arc surface 20312 is provided on the side of the top head 2031 facing the lock tongue 201, and an inwardly concave clamping angle 20313 is provided below the guide arc surface 20312. The clamping angle 20313 is clamped with a clamping platform 2016 at the rear end of the lock tongue 201 to limit the lock tongue 201 from turning over when it contacts the lock tongue 201. The connecting block 203 3 is plugged and installed with the linkage block 205, and the pin shaft is used for limiting, and the two are relatively fixedly installed; the dial plate, which is installed to slide relatively with the sliding enclosure, and its sliding direction forms an angle α with the extension and contraction direction of the lock tongue 201. One end of the dial plate is connected to the linkage block 205 through the linkage plate, and the linkage block 205 and the dial plate are all rotatably and slidably connected with the linkage plate. The linkage plate is provided with a long hole, and a rotating shaft is provided on the linkage block 205. The rotating shaft on the linkage block 205 and one end of the dial plate are both slidably installed in the long hole of the linkage plate. The rotation and sliding connection here can be understood as when the dial plate is subjected to a force perpendicular to the extension and contraction direction of the lock tongue 201, the dial plate is displaced along the sliding enclosure, and at the same time, one end of the dial plate slides along the long hole of the linkage plate, and the linkage plate drives the linkage block 205 to generate a rotational action.

[0054] See attached Figure 4-6 The dial plate is a plate body with convex shafts 213 respectively arranged at both ends, and the dial plate includes a first dial plate 206 and a second dial plate 207 arranged in parallel. A plurality of sliding holes 2091 are arranged on the top plate 204 and the bottom plate 209. Here, the sliding hole 2091 is arranged as a long hole. The angle between the axis of the sliding hole 2091 and the telescopic direction of the lock tongue 201 is an acute angle α, that is, the angle between the long axis of the long hole and the telescopic direction of the lock tongue 201 is α, where 25°≤α≤60°, preferably α is 35°, and the linkage plate includes a first linkage plate 2061 and a second linkage plate 20 71, the convex shafts 213 at both ends of the first dial plate 206 and the second dial plate 207 are respectively slidably installed in the sliding hole 2091, and the convex shafts 213 at one end of the first dial plate 206 and the second dial plate 207 close to the lock tongue 201 are respectively slidably installed in the long strip holes of the first linkage plate 2061 and the second linkage plate 2071. It can be understood that the positions of the first linkage plate 2061 and the second linkage plate 2071 are respectively installed at both ends of the linkage block 205, that is, between the linkage block 205 and the top plate 204 and between the linkage block 205 and the bottom plate 209.

[0055] See attached Figure 5The guide mechanism includes a guide hole 20411 arranged on the side plate 2041 and a fixed shaft 2012 and a rotating shaft 2013 installed on the lock tongue 201. The guide hole 20411 here is an arc-shaped long hole. The side plate 2041 is installed on the top plate 204 and the bottom plate 209 at one end close to the lock tongue 201 and is rotatably connected with the fixed shaft 2012 of the lock tongue 201. When the lock tongue 201 is subjected to external force, its rotating shaft 2013 slides along the guide hole 20411 with the fixed shaft 2012 as the center of the circle, thereby driving the lock tongue 201 to flip.

[0056] See attached Figure 2 and Figure 5 , the shell 202, the top plate 204 and the bottom plate 209 are provided with a shift hole 2022 extending along the extension direction of the lock tongue 201 at corresponding positions, and the shift hole 2022 is used for the shift rod 101 to pass through and enter between the first shift plate 206 and the second shift plate 207, so that the shift rod 101 can push the shift plate when it moves in a direction perpendicular to the extension direction of the lock tongue 201 to complete the unlocking action. The setting of the shift hole 2022 here can also make the lock body 200 suitable for door margins of different sizes.

[0057] See attached Figure 1 and Figure 2 A lock comprises the above-mentioned reversible single-tongue lock body 200 for a push-pull door lock, and also comprises two handles 100, a limiting rod 102 is installed between the two handles 100, and the limiting rod 102 is used to cooperate with the limiting hole 2021 of the shell 202 of the lock body 200 when the lock body 200 is installed on the door body, so as to realize the limited installation of the lock body 200, and the two handles 100 are respectively installed with a lever 101, and the lever 101 is used to link with the lever plate when the handle 100 is pushed and pulled, so as to drive the lock body 200 to flip and extend the lock tongue 201 and flip and retract it.

[0058] When the lock body 200 of the present invention is in use, the lock body 200 is first installed on the door body through the fixing plate 212. When the lock needs to be unlocked, the handle 100 drives the lever 101 to pry the lever plate, and the lever plate moves along the sliding hole 2091, and at the same time drives the linkage plate and the linkage block 205 to move synchronously. The top block 203 moves synchronously with the linkage block 205 under the action of the connecting rod 2032. At this time, the top block 203 is out of contact with the lock tongue 201. When the external force pushes and pulls the door body, the lock tongue 201 is overturned by force. At this time, the second elastic member 210 is compressed by force. Under the action of the elastic member 210, the baffle 211 transmits the force to the sliding enclosure, and the sliding enclosure moves as a whole, compressing the first elastic member 208, and the lock tongue 201 retracts synchronously to complete the unlocking action. When the external force is eliminated, under the joint action of the first elastic member 208 and the second elastic member 210, the lock tongue 201 flips and extends to reset. It should be pointed out that when the second elastic member 210 drives the top block 203 to reset, the guide arc surface 20312 of the top block 203 cooperates with the guide arc surface 2017 of the lock tongue 201 to realize the flipping and resetting of the lock tongue 201.

[0059] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0060] 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. A reversible single-tongue lock body for a push-pull door lock, comprising a lock tongue (201), characterized in that: Also includes: A fixing plate (212), the fixing plate (212) being mounted on the door body; The lock tongue (201) is driven by the linkage assembly to be flip-slidably installed relative to the fixed plate (212) so as to close the door when it flips and extends out of the fixed plate (212) and to open the door when it flips and retracts into the fixed plate (212); Linkage components include: The housing (202) is fixedly mounted relative to the fixing plate (212); A sliding assembly is located inside the housing (202) and is arranged to slide relative to the housing (202); the sliding assembly is installed in contact with the lock tongue (201) and is provided with a guide mechanism for guiding the lock tongue (201) to flip; the sliding assembly is pushed by a lever (101) linked to the handle (100) to achieve movement of the sliding assembly along a route for the lock tongue (201) to be extended and retracted; when the sliding assembly moves backward, an escape space is generated, and the escape space is used for the lock tongue (201) to flip and retract under the action of an external force of the door frame; The sliding assembly comprises: A sliding enclosure, the sliding enclosure being arranged inside the housing (202) and being slidably mounted relative to the housing (202), a first elastic member (208) being mounted between an end of the sliding enclosure away from the locking tongue (201) and the housing (202), the first elastic member (208) being used to generate a pre-tightening force on the sliding enclosure so as to reset the sliding enclosure in the direction of the locking tongue (201); A top block (203), one side of the top block (203) being installed in contact with the lock tongue (201), and the other side of the top block (203) being connected to the linkage block (205), an elastic member being installed between the top block (203) and the sliding enclosure plate to generate a pre-tightening force on the top block (203) to reset it in the direction of the lock tongue (201); A paddle plate is installed to slide relative to the sliding enclosure plate, and its sliding direction forms an angle α with the extension and retraction direction of the lock tongue (201); one end of the paddle plate is connected to the linkage block (205) via a linkage plate; the linkage block (205) and the paddle plate are all connected to the linkage plate in a rotational and sliding manner.

2. A reversible single-tongue lock body for a push-pull door lock according to claim 1, characterized in that: The top block (203) comprises a top head (2031), a connecting rod (2032) and a connecting block (2033) connected to the linkage block (205); the connecting rod (2032) connects the top head (2031) and the connecting block (2033); a guide arc surface (20312) is provided on a side of the top head (2031) facing the lock tongue (201); an inwardly concave clamping angle (20313) is provided below the guide arc surface (20312); the clamping angle (20313) is clamped with a clamping platform (2016) at the rear end of the lock tongue (201) so as to limit the lock tongue (201) from turning over when the clamping angle (20313) contacts the lock tongue (201).

3. A reversible single-tongue lock body for a push-pull door lock according to claim 2, characterized in that: The sliding enclosure comprises a top plate (204) and a bottom plate (209) arranged in parallel, and a side plate (2041) connecting the top plate (204) and the bottom plate (209); the top plate (204) is provided with two through holes opened along the extension and contraction direction of the lock tongue (201); one through hole is used to provide a guide for the reciprocating sliding of the boss (20311) of the top block (203); and the other through hole is used to provide a guide for the reciprocating sliding of the linkage block (205); a baffle (211) is installed between the top plate (204) and the bottom plate (209); and the elastic member on the top block (203) is a second elastic member (210) which is sleeved on the connecting rod (2032) and is located between the top head (2031) and the baffle (211).

4. A reversible single-tongue lock body for a push-pull door lock according to claim 3, characterized in that: The shift plate is a plate body with convex shafts (213) respectively arranged at both ends. The shift plate comprises a first shift plate (206) and a second shift plate (207) arranged in parallel. A plurality of sliding holes (2091) are arranged on the top plate (204) and the bottom plate (209). The included angle between the axis of the sliding hole (2091) and the extension direction of the lock tongue (201) is an acute angle. The linkage plate comprises a first linkage plate (2061) and a second linkage plate (2071). The convex shafts (213) at both ends of the first shift plate (206) and the second shift plate (207) are respectively slidably mounted in the sliding holes (2091). The convex shafts (213) at one end of the first shift plate (206) and the second shift plate (207) close to the lock tongue (201) are respectively slidably mounted in the long strip holes of the first linkage plate (2061) and the second linkage plate (2071).

5. A reversible single-tongue lock body for a push-pull door lock according to claim 4, characterized in that: The guide mechanism comprises a guide hole (20411) arranged on the side plate (2041) and a fixed shaft (2012) and a rotating shaft (2013) installed on the lock tongue (201); the side plate (2041) is installed on one end of the top plate (204) and the bottom plate (209) close to the lock tongue (201) and is rotatably connected to the fixed shaft (2012) of the lock tongue (201); when the lock tongue (201) is subjected to an external force, the rotating shaft (2013) slides along the guide hole (20411) with the fixed shaft (2012) as the center of the circle, thereby driving the lock tongue (201) to flip.

6. A reversible single-tongue lock body for a push-pull door lock according to any one of claims 2 to 5, characterized in that: The sliding enclosure is provided with a plurality of wear-resistant protrusions (214) protruding from the surface of the sliding enclosure, and the wear-resistant protrusions (214) are formed by stamping the sliding enclosure in one piece.

7. A reversible single-tongue lock body for a push-pull door lock according to claim 6, characterized in that: The tongue end (2018) of the lock tongue (201) has an angle of γ, a silencer (211) is embedded on the tongue end (2018), the silencer (211) is arranged in a V-shaped structure, the tongue end (2018) is connected to the clamping table (2016) by a guide arc surface (2017), the guide arc surface (2017) contacts the guide arc surface (20312) of the top block (203) when in an unlocked state, and when the silencer (2011) is installed on the lock tongue (201), its two sides are in contact with the tongue end (2018). The angles are all β and the vertical distance between the corner of the silencer (2011) and the tongue end (2018) is the largest. The vertical distance is set to m. When the lock tongue (201) is in a locked state, the distance between the tongue end (2018) and the fixed plate (212) is N, wherein 30°≤γ≤60°, 1.5°≤β≤3°, 0.45mm≤m≤0.75mm, and N≥10mm. The width of the silencer (2011) is L, and the width of the lock tongue (201) is H, wherein 2.5L≤H≤4.5L.

8. A reversible single-tongue lock body for a push-pull door lock according to claim 4, characterized in that: The housing (202), the top plate (204) and the bottom plate (209) are provided with shift holes (2022) extending in the extension direction of the lock tongue (201) at corresponding positions. The shift holes (2022) are used for allowing the shift rod (101) to pass through and enter between the first shift plate (206) and the second shift plate (207), so that the shift rod (101) can push the shift plate when it moves in a direction perpendicular to the extension direction of the lock tongue (201), thereby completing the unlocking action.

9. A lock comprising a reversible single-tongue lock body for a push-pull door lock as claimed in any one of claims 1 to 8, characterized in that: The invention also comprises two handles (100), wherein a limiting rod (102) is installed between the two handles (100), and the limiting rod (102) is used to cooperate with a limiting hole (2021) of a housing (202) of the lock body (200) when the lock body (200) is installed on the door body, so as to realize limited installation of the lock body (200), and the two handles (100) are respectively installed with a lever (101), and the lever (101) is used to link with a lever plate when the handles (100) are pushed and pulled, so as to realize driving the lock body (200) to make the lock tongue (201) flip out and retract.

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