CN217760457U

CN217760457U - Lock for door

Info

Publication number: CN217760457U
Application number: CN202121544374.1U
Authority: CN
Inventors: 梁忠; 古雪丰
Original assignee: Consumer 2.0 Inc
Current assignee: Consumer 2.0 Inc
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2022-11-08
Anticipated expiration: 2031-07-07

Abstract

In one embodiment, the present application provides a lockset for a door. The door includes a front face and an opposing back face, and defines a latch mounting aperture therethrough. The lockset includes: a front panel assembly disposed on the front surface; a back panel assembly disposed at the back; the lock body is arranged in the lock mounting hole; and at least one connector. The front panel assembly and the rear panel assembly are fixedly connected to the front face and the rear face respectively through at least one connecting piece, at least one part of the front panel assembly and/or at least one part of the rear panel assembly comprise high-temperature-resistant materials, and in an installation state, at least one part of the front panel and/or at least one part of the rear panel are arranged to cover the lock installation hole. The application provides a tool to lock has fire prevention ability and simple installation.

Description

Lock for door

Technical Field

The present disclosure relates to the field of locks, and more particularly to locks for doors.

Background

The existing door lock adopts a front lock assembly full zinc alloy and aluminum alloy structure, when a fire disaster occurs, the zinc alloy and the aluminum alloy structure of the front lock assembly are heated and melted due to high temperature, the front and the back fixing screws freely fall from the lock mounting through holes on the door at the moment, the back cover plate also falls off from the door, an external fire source and smoke are poured into the room from the lock seam, the human body and property are injured, and the safety and the practicability of the door lock are greatly reduced.

Disclosure of Invention

In some embodiments, this application is for solving prior art door lock after the conflagration takes place, has external source of a fire and the problem that the flue gas pours into the room from the crack into:

summary of the inventionin one aspect, the present application provides a latch for a door, the door including a front face and an opposite rear face and defining a latch mounting hole therethrough, the latch comprising: a front panel assembly disposed on the front surface; a back panel assembly disposed at the back; the lock body is arranged in the lock mounting hole; and at least one connector; the front panel assembly and the back panel assembly are fixedly connected to the front face and the back face respectively through at least one connecting piece, at least one part of the front panel assembly and/or at least one part of the back panel assembly comprise high-temperature-resistant materials, and in an installation state, at least one part of the front panel assembly and/or at least one part of the back panel assembly are arranged to cover the lock installation hole.

In another aspect, the present application provides a latch for a door, the door including a front face and an opposing back face and defining a latch mounting hole therethrough, the latch comprising: the front panel assembly comprises a front panel, and the front panel is arranged on the front side and fixed with the front panel; the back panel assembly comprises a back panel, and the back panel is arranged on the back and fixed with the back panel; the lock body is arranged in the lock mounting hole; and the cover plate assembly comprises a front cover plate and a rear cover plate, the front cover plate is fixedly connected with the front cover plate, the rear cover plate is arranged between the back face and the rear cover plate assembly, and the front cover plate and/or the rear cover plate comprise high-temperature-resistant materials and are arranged to cover the lock mounting hole.

In yet another aspect, the present application provides a lock for a door including a front face and an opposing back face and defining a lock mounting hole therethrough, the lock comprising: a front panel assembly including a front panel fixed to the front surface; the front cover plate comprises a high-temperature-resistant material and is fixedly connected with the front panel; a back panel assembly comprising: a rear panel fixed to the rear surface; and a rear cover plate which comprises a high-temperature resistant material and is fixedly connected between the back surface and the rear panel; the lock body is arranged in the lock mounting hole; the lock also comprises a knob used for unlocking the lock from the back; the connecting shaft comprises a front end and a rear end, the front end of the connecting shaft is fixedly connected with the lock body, the rear end of the connecting shaft is connected with the knob, in an installation state, the front cover plate and/or the rear cover plate cover the lock installation hole, the front cover plate and the rear cover plate respectively comprise at least one threaded hole, and the connecting shaft is configured to be matched with the front cover plate and the rear cover plate to be connected with the front surface and the rear surface through screws; the rear cover plate also comprises a protruding part which is used for being inserted into the lock mounting hole so as to position the mounting position of the rear cover plate.

The present application has many advantages in various embodiments. In some embodiments, the lock for the door provided by the application is characterized in that materials capable of resisting high temperature in a fire scene are arranged in the front panel assembly and the rear panel assembly of the lock, at least the high-temperature material part is firmly fixed on one side or two sides of the lock mounting hole in a special fixing mode, and even if other parts of the lock are melted by high temperature, the high-temperature material part can basically cover all or most of the range of the lock mounting hole so as to prevent fire from spreading and prevent smoke from diffusing into a room from a lock seam, and the safety is greatly improved. In some embodiments, the whole lock has a very simple structure, so that the lock is quick and easy to install, and has outstanding advantages.

Drawings

Further understanding of the nature and advantages of the present application may be realized by reference to the remaining portions of the specification and the drawings; the same components are numbered the same throughout the several views. In some cases, a sublabel is placed after a reference numeral and hyphen to denote one of many similar components. When a reference numeral is used to refer to a particular feature, but not necessarily any particular element, it is intended to refer to that feature.

Fig. 1 is an exploded view of a lock according to an embodiment of the present invention.

Fig. 2 is an exploded view of the embodiment of fig. 1, partially assembled.

FIG. 3 shows a lock according to one embodiment of the present application in a fire environment.

FIG. 4 illustrates another condition of the latch according to one embodiment of the present application in a fire environment.

Detailed Description

Embodiments are described in more detail below with reference to the following examples, which are provided herein by way of illustration only and are not intended to be limiting.

The present application is susceptible to numerous modifications as would be apparent to one skilled in the art and which will achieve the intended uses of the present application.

The words for defining the space or position, such as inner, outer, upper, lower, left, right, top, bottom, front and back, are defined by reference to the position of the lock in the installed state.

In the present application, the term "comprising" is intended to include, but not be limited to, the following elements, i.e., not to exclude other elements.

In the present application, the term "front panel" refers to a support structure provided in correspondence of the front of the door, constituting the main profile of the front of the lock, without limiting it to a plane structure only. For example, a "front panel" may include a planar or non-planar portion.

In the present application, the term "rear panel" refers to a support structure provided in correspondence of the rear face of the door, constituting the main profile behind the lock, without limiting it to a plane structure only. For example, a "back panel" may include a planar or non-planar portion.

In this application, the term "covering" is not limited to absolute conditions in which smoke is completely unable to pass through the lock mounting hole, but also includes relative conditions in which a substantial portion of the lock mounting hole is covered.

The terms "inner", "outer", "upper", "lower", "left", "right", "top", "bottom", "front" and "back" used herein for spatial or positional limitations are defined with reference to the position of the door lock of the embodiment in the installed state. The terminology is used for the purpose of describing reference points only for convenience of description and thus will not limit the example embodiments to any particular orientation or configuration.

As used herein and in the claims, "connected" refers to the physical joining of one element to another element, either directly or indirectly.

As used herein and in the claims, the terms "substantially", "approximately" and "approximately" mean that the stated features, angles, shapes, states, structures or values need not be achieved exactly, but may not preclude deviations or variations in the amounts of the effects that the features are intended to provide, including for example tolerances, measurement errors, measurement accuracy limitations and other factors known to those of skill in the art. For example, an object that is "substantially" perpendicular to an axis, line, or surface would mean that the object is either completely perpendicular to the axis, line, or surface or nearly completely perpendicular to the axis, line, or surface, e.g., with a 5% deviation.

One aspect of the present application provides a latch for a door, the door including a front face and an opposing back face, and defining a latch mounting hole therethrough, the latch comprising: a front panel assembly disposed on the front surface; a rear panel assembly disposed at the rear; the lock body is arranged in the lock mounting hole; and at least one connector; the front panel assembly and the back panel assembly are fixedly connected to the front face and the back face respectively through at least one connecting piece, at least one part of the front panel assembly and/or at least one part of the back panel assembly comprise high-temperature-resistant materials, and in an installation state, at least one part of the front panel assembly and/or at least one part of the back panel assembly are arranged to cover the lock installation hole. This embodiment makes tool to lock itself have fire prevention ability, even the conflagration high temperature melts most materials of tool to lock, and some high temperature resistant material makes it stay one side or both sides of tool to lock mounting hole through unique connected mode in addition, makes the tool to lock mounting hole keep hindering the cigarette ability.

In one embodiment, at least a portion of the front panel assembly includes a front cover panel of a high temperature resistant material sufficient to cover the lock mounting hole; and/or at least a portion of the back panel assembly includes a back cover plate that is made of a high temperature resistant material and is sufficient to cover the lock mounting hole.

In one embodiment, the front panel assembly further comprises a front panel, and the front cover plate is disposed within and fixedly attached to the front panel.

In one embodiment, the back panel assembly further comprises a back panel, and the back cover plate is fixedly connected with the back panel.

In some embodiments, the refractory material of the back cover plate is carbon steel.

In one embodiment, the front cover plate and the rear cover plate respectively comprise at least one corresponding front fixing hole and rear fixing hole, and the front cover plate and the rear cover plate are configured to be fixedly connected through at least one connecting piece, so that the lock mounting holes are covered.

In one embodiment, the front fixing holes and the rear fixing holes are threaded holes, and the connecting members are screws.

In one embodiment, the rear cover plate includes a protrusion thereon configured to fit into the lock mounting hole for insertion into the lock mounting hole to locate the mounting position of the rear cover plate.

In one embodiment, the front panel includes a guide portion thereon, the guide portion including an outer perimeter that matches at least a portion of a contour of the lock mounting hole for insertion into the lock mounting hole to locate a mounting position of the front panel and/or define a position of the lock body. The lockset can be accurately positioned between simpler components and between doors.

In one embodiment, the front panel further comprises a main body part made of an alloy material with good ductility, and the main body part is fixedly connected with the front cover plate.

In one embodiment, the front panel assembly further includes a screen that allows user interaction to control the lock so that the user can complete the unlocking by entering a password, fingerprint, etc. from the screen.

In one embodiment, the lock body further comprises a connecting shaft; and the knob is used for unlocking the lockset from the back, and the connecting shaft penetrates through the rear cover plate to connect the lock body and the knob.

Another aspect of the present application provides a latch for a door including a front face and an opposing back face and defining a latch mounting hole therethrough, the latch comprising: the front panel assembly comprises a front panel, and the front panel is arranged on the front side and fixed with the front panel; the back panel assembly comprises a back panel, and the back panel is arranged on the back and fixed with the back panel; the lock body is arranged in the lock mounting hole; and the cover plate assembly comprises a front cover plate and a rear cover plate, the front cover plate is fixedly connected with the front cover plate, the rear cover plate is arranged between the back face and the rear cover plate assembly, and the front cover plate and/or the rear cover plate comprise high-temperature-resistant materials and are arranged to cover the lock mounting hole.

In one embodiment, the front cover plate comprises at least one front fixing hole and the rear cover plate is provided with at least one rear fixing hole, and the front fixing hole and the rear fixing hole are configured to be matched with the front cover plate and the rear cover plate to be fixedly connected with the front surface and the rear surface through connecting pieces.

In one embodiment, the front panel includes a guide portion thereon, the guide portion having an outer periphery conforming to at least a portion of the contour of the lock mounting hole for insertion into the lock mounting hole to locate the mounting position of the front panel and/or define the position of the lock body.

Yet another aspect of the present application provides a latch for a door including a front face and an opposing back face and defining a latch mounting hole therethrough, the latch comprising: a front panel assembly including a front panel fixed to a front surface of the door; the front cover plate comprises a high-temperature-resistant material and is fixedly connected with the front panel; a back panel assembly comprising: a rear panel fixed to the rear surface; and a rear cover plate including a high temperature resistant material and fixedly connected between the rear surface of the door and the rear panel; the lock body is arranged in the lock mounting hole; the lock also comprises a knob used for unlocking the lock from the back; the connecting shaft comprises a front end and a rear end, the front end of the connecting shaft is fixedly connected with the lock body, the rear end of the connecting shaft is connected with the knob, in an installation state, the front cover plate and/or the rear cover plate cover the lock installation hole, the front cover plate and the rear cover plate respectively comprise at least one threaded hole, and the connecting shaft is configured to be matched with the front cover plate and the rear cover plate to be connected with the front surface and the rear surface through screws; the rear cover plate also comprises a protruding part which is used for being inserted into the lock mounting hole so as to position the mounting position of the rear cover plate.

In some embodiments, the refractory material of the front cover plate and the back cover plate is carbon steel.

Various embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

As shown in fig. 1, the lock 100 of one embodiment is configured to be disposed on an exploded view of a door 10, the door 10 includes a front surface 11 (e.g., located outside a space defined by the door) and a back surface 12 (e.g., located inside the space defined by the door) opposite to the front surface 11, and the door 10 is further provided with lock mounting holes 13 penetrating through the front surface 11 and the back surface 12 of the door 10. In the illustrated embodiment, the lock 100 basically includes a front panel assembly 200, a rear panel assembly 300, a lock body 500 and a connector 400. The front panel assembly 200 is disposed at the front 11 and the rear panel assembly 300 is disposed at the rear 12. Connector 400 secures front panel assembly 200 and back panel assembly 300 to each other through latch mounting hole 13. Lock body 500 is disposed within lock mounting hole 10, and lock body 500 is the main body that actuates bolt 510 to eject or retract into door 10. The latch 510 locks the door when ejected and the latch 510 allows the door to open when retracted into the door. The lock body 500 and the locking tongue 510 are shown in a schematic manner and are not intended to exclude other prior art. The lock body may comprise a lock body driven by a motor.

Referring to fig. 2 and 1, the front panel assembly 200 is disposed on the front surface 11 of the door 10 and includes a front panel 210, a front cover 220, and a screen 230. The front cover 220 is disposed inside the front panel 210 and is fixedly coupled to the front panel 210. The front panel 210 includes an outer frame and a main body portion 2120 constituting an integral supporting frame structure of the front panel assembly 200. The outline of the whole outline of the outer frame is approximately a round corner cuboid. The body portion 2120 is made of a good ductility metal including, but not limited to, a zinc alloy or an aluminum alloy. In one embodiment, the body portion 2120 is provided with outwardly extending guides 2123 on a side facing the front face 11 for locating the relative position of the front panel 210 and the lock mounting hole 13 and the relative position of the lock body 500 within the lock mounting hole 13. As shown in fig. 1, the guide 2123 has an outer periphery 2125 that matches at least a portion of the inner diameter of the lock mounting hole 13, the outer periphery 2125 including upper and

lower portions

2125A, 2125B, each having an arcuate surface that is the same or slightly smaller in diameter than the lock mounting hole 13; the center of the perimeter 2125 defines a space 2124 configured to cooperate with the lock body 500 such that after the guide 2123 is inserted into the lock mounting hole 13, the front panel 210 is secured to the door 10 to maintain its position against movement, and a portion or the entirety of the lock body 500 cooperates with the space 2124 to place the lock body 500 in a relatively fixed position within the lock mounting hole 13. The body portion 2120 is also provided with a plurality of through holes for connection holes to a front cover plate, a rear cover plate, or the like, or for passage of signal lines or the like. The front cover plate 220 may be made of a high temperature resistant material, such as carbon steel. The fixing method of the front cover plate 220 and the front panel 210 includes welding, clamping, screwing, etc., so that the front cover plate 220 and the front panel 210 can be an integral component in a combined state. In one embodiment, the front cover plate 220 is sized to completely or substantially cover the latch mounting hole 13. The front cover plate 220 may be provided with a plurality of through holes, such as two front fixing holes 2221A, 2221B as shown in the drawings. In this embodiment, the front fixing holes 2221A, 2221B may be screw holes. In this embodiment, the front cover 220 may be provided with a signal line hole 2222 for passing an electrical signal connection with the screen 230. In one embodiment, the front cover plate 220 may further include one or more additional coupling holes for fixing with other components. Optionally, the lock 100 further includes a screen 230 fixedly connected to the front panel 210 for interacting with a user, such as for enabling the user to input an unlock code, enter an unlock fingerprint, or capture an unlock video, etc. The screen 230 may be formed integrally with the front panel 210 after being assembled to form the front panel assembly 200 as shown in fig. 2, which is convenient for a user to install and use the front panel assembly 200 as a unit.

With continued reference to fig. 1 and 2, a back panel assembly 300 is disposed at the back 12 of the door 10, the back panel assembly 300 including a back panel 310 and a back cover 320, wherein the back cover 320 is disposed between the back 12 and the back panel 310. In one embodiment, the rear panel 310 may be a unitary component, which is provided with other components for cooperating with the lock body 500, and the rear panel 310 may be further provided with a knob 3132, the knob 3132 being connected to the lock body 500 through a connecting shaft (not shown). When the knob 3132 is rotated, the lock body 500 may be controlled and the latch tongue 510 may be pushed out or pulled back, i.e., the lock body 500 may be controlled to be opened and closed from the inside of the door. In some embodiments, the rear cover plate 320 may be made of a high temperature resistant material, such as stainless steel, carbon steel, or the like. In this embodiment, the rear cover plate 320 is sized to completely cover the latch mounting holes 13. In some embodiments, the back cover 320 is sized to substantially cover the latch mounting hole 13. In this embodiment, the rear cover plate 320 may be provided with a plurality of holes for fixing different members to each other by screws, bolts, etc., and two rear fixing holes 3231A, 3231B shown in fig. 1 are two of the plurality of holes of the rear cover plate, which are sized and shaped so that the connection member 400 can pass therethrough. In this embodiment, the connecting member 400 is two screws, and can be threaded through the

rear fixing holes

3231A and 3231B and the threaded holes of the front fixing

holes

2221A and 2221B when being mounted. In one embodiment, the connector 400 may be a screw made of a high temperature resistant material. The threaded end of the connector 400 passes through the rear fixing hole 3231 of the rear cover 320, passes through the

rear fixing holes

3231A and 3231B, and is in threaded connection with the threaded holes of the front fixing

holes

2221A and 2221B through the lock mounting hole 13. In one embodiment, a boss 3230 may also be disposed on the back cover plate 320. Boss 3230 has a flanged perimeter 3234 that mates with at least a portion of latch mounting hole 13 to locate the mounting position of back cover 320 to door 10. In one embodiment, the back plate 320 is fixedly coupled to the back plate 310 by back plate screws 3233 when installed. In one embodiment, the rear cover plate 320 and the rear plate 310 may be fixed as one integral component in a combined state.

In one embodiment, when a user installs the lock 100 on the door 10, the user removes the front panel assembly 200, inserts the guide 2123 into the lock installation hole 13 from the front or front 11 of the door 10, then puts the lock body 500 into the space defined by the guide 2123 and the lock installation hole 13 from the side hole of the door 10, and connects the signal line to the screen 230 through the signal line hole 2222 on the front panel assembly 200, and then installs the rear panel assembly 300 as a whole into the lock installation hole 13 from the back of the door, so that the threaded end of the connecting member 400 is connected to the corresponding hole on the front panel assembly 200 through the lock installation hole 13, and screws the threads tightly, thereby fixedly connecting the front panel assembly 200 and the rear panel assembly 300.

In some embodiments, when a user installs the latch to the door, the user removes the front panel assembly 200 and inserts the positioning portion 23 into the latch installation hole 13 from the front or front of the door 10. The lock body 500 is then placed in the space defined by the position fixing part 23 and the lock body installation hole 13, and a signal line is connected to the screen 230 through the signal line hole on the front panel assembly. The rear cover plate 320 is then coupled to the front panel assembly 200 through the rear fixing hole 3231 thereof by the coupling member 400. For example, to the front fixing hole 2221 provided on the front cover plate 220, and then screwed. Then, the rear panel 310 and the rear cover panel 320 are fixedly coupled by the screws 3233. Accordingly, the front panel assembly 200 and the rear panel assembly 300 are fixedly coupled to each other.

In a fire situation, smoke cannot pass through the latch installation hole 13 of the door 10 since the front panel assembly 200 and the rear panel assembly 300 are fixedly coupled to each other and at least one of the front panel assembly 200 and the rear panel assembly 300 completely covers the latch installation hole 13. Even in the case where the screen 230 and the main portion 2120 of the front panel 210 are burned to be melted, since the front cover 220 and/or the rear cover 320 are or include high temperature resistant materials, the front cover 220 can resist high temperature without melting, the front cover 220 is in the blocking state as shown in fig. 3, and further the rear cover 320 on the rear surface 12 is engaged, the whole lock mounting hole 13 can block smoke from entering the opposite side of the door or the room through the lock mounting hole 13, and safety and fire protection are greatly improved. Moreover, the whole lockset has a very simple integral structure, so that the lockset is quick and easy to install and has outstanding advantages.

The methods provided by the example embodiments in this specification are by way of example only, and the examples of one method are not intended to limit the examples of another method. The apparatus/methods discussed in one figure may be added to or exchanged with the apparatus/methods in other figures. Moreover, specific numeric data values (e.g., specific numbers, quantities, categories, etc.) or other specific information are used only to discuss the example embodiments and are not used to limit the example embodiments to such specific information.

For example, the connector secures the front and back panel assemblies to each other through the lock mounting hole, but may also secure the two through an additional separate aperture in the door. For example, the front panel assembly and the back panel assembly are fixedly connected to each other by screws and threaded holes, but may be fixed in other manners, including welding, clamping, adhesive connection, and the like.

For example, the structure and arrangement of the lock body and the lock tongue are shown in the examples, but the lock body and the lock tongue with various specific structures and starting modes in the field can also be applied to the lock, and other structures and arrangements in the prior art are not excluded.

Claims

1. A latch for a door, the door including a front face and an opposing back face and defining a latch mounting hole therethrough, the latch comprising:

(a) A front panel assembly disposed on the front side;

(b) A rear panel assembly disposed on the rear surface;

(c) The lock body is arranged in the lock mounting hole; and

(d) At least one connecting piece is arranged on the base,

the method is characterized in that: the front panel assembly and the back panel assembly are fixedly connected to the front face and the back face respectively through the at least one connecting piece, at least one part of the front panel assembly and/or at least one part of the back panel assembly comprise high-temperature-resistant materials, and in an installation state, at least one part of the front panel assembly and/or at least one part of the back panel assembly are arranged to cover the lock installation hole.

2. The lock according to claim 1,

at least one part of the front panel assembly comprises a front cover plate, and the front cover plate is made of high-temperature-resistant materials and is enough to cover the lock mounting hole; and/or

At least a portion of the back panel assembly includes a back cover plate of a high temperature resistant material sufficient to cover the lock mounting hole.

3. The lockset of claim 2 wherein said front panel assembly further comprises a front panel, said front cover being disposed within said front panel and fixedly attached thereto.

4. The lockset of claim 2 wherein said rear panel assembly further comprises a rear panel, said rear cover panel being fixedly secured to said rear panel.

5. The lock according to claim 1 or 2, characterized in that said refractory material is carbon steel.

6. The lock according to claim 2,

the front cover plate and the rear cover plate respectively comprise at least one corresponding front fixing hole and at least one corresponding rear fixing hole, and the front cover plate and the rear cover plate are matched and fixedly connected through at least one connecting piece, so that the lock mounting holes are covered.

7. The lock according to claim 6,

the front fixing hole and the rear fixing hole are threaded holes, and the connecting piece is a screw.

8. The lock according to claim 2, wherein the back cover plate includes a protrusion thereon configured to fit into a lock mounting hole for insertion into the lock mounting hole to locate the mounting position of the back cover plate.

9. The lock of claim 3, wherein the front panel includes a guide thereon, the guide including an outer perimeter that matches at least a portion of a profile of the lock mounting hole for insertion into the lock mounting hole to locate an installed position of the front panel and/or to define a position of the lock body.

10. The lockset of claim 3 wherein said front panel further comprises a main body portion of an alloy material, said main body portion being fixedly attached to said front cover plate.

11. The lockset of claim 1 wherein said front panel assembly further comprises a screen allowing user interaction to control the lockset.

12. The lock according to claim 2,

the lock body also comprises

A connecting shaft; and

a knob for unlocking the lock from the back side,

the connecting shaft penetrates through the rear cover plate to be connected with the lock body and the knob.

13. A lock for a door including a front face and an opposing rear face and defining a lock mounting hole therethrough, the lock comprising:

(a) A front panel assembly including a front panel disposed on and secured to the front face;

(b) The rear panel assembly comprises a rear panel, and the rear panel is arranged on the back surface and fixed with the back surface;

(c) The lock body is arranged in the lock mounting hole; and

(d) The cover plate component comprises a front cover plate and a rear cover plate, the front cover plate is fixedly connected with the front plate, the rear cover plate is arranged between the back surface and the rear cover plate component,

wherein the front cover plate and/or the back cover plate comprise a high temperature resistant material and are configured to cover the lock mounting holes.

14. The lock according to claim 13, wherein: the front cover plate comprises at least one front fixing hole and the rear cover plate is provided with at least one rear fixing hole, and the front cover plate and the rear cover plate are matched and fixedly connected with the front surface and the rear surface through connecting pieces.

15. The lock according to claim 13, wherein: the front panel comprises a guide part, the periphery of the guide part is matched with at least one part of the outline of the lock mounting hole, and the guide part is used for being inserted into the lock mounting hole to position the mounting position of the front panel and/or limit the position of the lock body.

16. The lock according to claim 13, wherein: the rear cover plate comprises a protruding portion matched with the lock mounting hole in a configuration mode, and the protruding portion is used for being inserted into the lock mounting hole to position the mounting position of the rear cover plate.

17. A lock for a door, the door including a front face and an opposite rear face and defining a lock mounting hole therethrough, the lock comprising:

(a) A front panel assembly, comprising:

a front panel fixed to the front surface; and

the front cover plate comprises a high-temperature-resistant material and is fixedly connected with the front panel;

(b) A back panel assembly comprising:

a rear panel fixed to the rear surface; and

the rear cover plate comprises a high-temperature-resistant material and is fixedly connected between the back surface and the rear panel; and

(c) The lock body, set up in the tool to lock mounting hole includes:

a knob for unlocking the lock from the back; and

a connecting shaft, which comprises a front end and a rear end, wherein the front end is fixedly connected with the lock body, the rear end is connected with the knob,

in an installation state, the front cover plate and/or the rear cover plate cover the lockset installation hole, the front cover plate and the rear cover plate respectively comprise at least one threaded hole, and the front cover plate and the rear cover plate are matched and connected with the front surface of the front cover plate and the rear surface of the rear cover plate through screws; the rear cover plate further comprises a protruding portion used for being inserted into the lock mounting hole to position the mounting position of the rear cover plate.

18. The lock according to claim 17, wherein: the high-temperature resistant material is carbon steel.