CN211500130U

CN211500130U - Hidden split lock

Info

Publication number: CN211500130U
Application number: CN201921676823.0U
Authority: CN
Inventors: 谭炳楠; 林锡杰; 梁锡钊
Original assignee: Jiangmen Keyu Intelligence Co ltd
Current assignee: Jiangmen Keyu Intelligence Co ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-09-15
Anticipated expiration: 2029-09-30

Abstract

The utility model discloses a hidden split lock, which is used for being installed on a door body and comprises an electronic lock body and a control component, wherein the electronic lock body is embedded in the door body; the induction reading head is provided with an extending part extending into the door body, and the extending part of the induction reading head is electrically connected with the controller through a lead. Through setting up the inside electronic lock body and the control assembly of the embedded door body, the main part of control assembly and electronic lock body all can be hidden in the inside of the door body to need not install front panel and rear panel on the door body, can reduce supporting of panel, it is more convenient to let the installation of tool to lock, avoids appearing the panel and outstanding the condition on the door body, and then lets the door body after the installation tool to lock, and is whole more brief, more pleasing to the eye, satisfies customer's demand.

Description

Hidden split lock

Technical Field

The utility model relates to a tool to lock technical field, in particular to hidden components of a whole that can function independently lock.

Background

The electronic electric control lock generally has a front panel and a rear panel arranged on a door body and is used for placing an electric control plate or an electric control assembly, so that the lock body is controlled to realize the functions of unlocking and locking. However, the front panel and the rear panel protrude out of the door body, so that the occupied area is large, the installation is complicated, the door body is complicated in appearance, the appearance is not attractive enough, and the requirements of customers are difficult to meet.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a hidden components of a whole that can function independently lock, hidden components of a whole that can function independently lock has reduced the outfit of panel, and it is more convenient to install.

The utility model provides a hidden components of a whole that can function independently lock for install on the door body, include:

the electronic lock body is embedded into the door body;

the control assembly is used for controlling the electronic lock body and embedded into the door body, and is provided with a controller which is in signal connection with the electronic lock body;

the induction reading head is provided with an extending part extending into the door body, and the extending part of the induction reading head is electrically connected with the controller through a lead.

According to the utility model discloses hidden components of a whole that can function independently lock has following technological effect at least: through setting up the inside electronic lock body and the control assembly of the embedded door body, the main part of control assembly and electronic lock body all can be hidden in the inside of the door body to need not install front panel and rear panel on the door body, can reduce supporting of panel, it is more convenient to let the installation of tool to lock, avoids appearing the panel and outstanding the condition on the door body, and then lets the door body after the installation tool to lock, and is whole more brief, more pleasing to the eye, satisfies customer's demand.

According to the utility model discloses a some embodiments, the response read head stretch into the portion and be provided with the installation rack that moves towards around, control assembly is provided with the pivot seat that has the axis of rotation, the axis of rotation be provided with the gear that the installation rack matches, the pivot seat is provided with first screw hole, the axis of rotation is through installing the first clamp bolt of first screw hole is fixed on the pivot seat, stretch into the portion and still be provided with the spout that moves towards around, the pivot seat with spout sliding connection.

According to some embodiments of the utility model, the rear end of the portion of stretching into of response read head can be dismantled and is connected with the extension, the extension be provided with the extension rack that the installation rack meets and with the extension slot that the spout meets.

According to some embodiments of the invention, the end of the inductive reading head remote from the run-in portion is provided with a decorative lens.

According to the utility model discloses a some embodiments, control assembly is including the installation shell, the pivot seat is provided with waist shape hole, the pivot seat is through passing the second housing bolt in waist shape hole is installed on the installation shell.

According to some embodiments of the utility model, the installation shell is provided with the battery case, the battery case with the controller electricity is connected.

According to some embodiments of the utility model, still including the handle of opening a door and handle lid, the handle of opening a door pass through the handle axle with the electronic lock body is connected, the handle lid is provided with the mounting hole, the handle lid is through passing the connecting piece of mounting hole is fixed on the electronic lock body.

According to some embodiments of the present invention, the handle shaft is provided with a first torsion spring limiting plate coaxially rotating at a position inside the handle cover, one side of the first torsion spring limiting plate close to the handle cover is provided with a first torsion spring limiting plate, the handle shaft is sleeved with a second torsion spring limiting plate between the first torsion spring limiting plate and the handle cover, a handle torsion spring is sleeved between the second torsion spring limiting plate and the first torsion spring limiting plate, one side of the second torsion spring limiting plate close to the first torsion spring limiting plate is provided with a second torsion spring limiting plate, and the second torsion spring limiting plate is mounted on the handle cover through screws; when the door-opening handle is placed still, the two torsion arms of the handle torsion spring are both abutted to the first torsion spring limiting block and the second torsion spring limiting block.

According to some embodiments of the utility model, the second torsional spring limiting plate is provided with a plurality of locating holes around the handle axle, the handle lid be provided with the second screw hole that the screw matches, the screw passes one of them the locating hole is installed on the second screw hole.

According to the utility model discloses a some embodiments, second torsional spring limiting plate is provided with and is used for dodging dodge the opening of dodging of connecting piece.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a hidden split lock according to an embodiment of the present invention installed on a door body;

FIG. 2 is a schematic view of the concealed split lock shown in FIG. 1;

FIG. 3 is an exploded schematic view of the control assembly shown in FIG. 2;

FIG. 4 is a cross-sectional structural schematic view of the control assembly shown in FIG. 2;

FIG. 5 is an exploded view of the inductive read head shown in FIG. 2;

FIG. 6 is a cross-sectional view of the door handle of FIG. 2;

fig. 7 is an assembly structure view of the first torsion spring restriction plate shown in fig. 6.

Reference numerals:

the electronic lock body 100,

A control assembly 200, a controller 210, a rotating shaft 220, a rotating shaft seat 230, a first pressing bolt 231, a gear 240, a mounting shell 250, a kidney-shaped hole 260, a second pressing bolt 270, a battery box 280,

The inductive reading head 300, the extending part 310, the mounting rack 320, the sliding groove 330, the extending part 340, the extending rack 341, the extending groove 342, the decorative lens 350,

A door opening handle 400, a handle shaft 410, a first torsion spring limit plate 420, a first torsion spring limit block 421, a second torsion spring limit plate 430, a first torsion spring limit block 431, a locating hole 432, an avoiding gap 433, a handle torsion spring 440, a screw 450, a bolt,

A handle cover 500, a mounting hole 510,

A door body 600,

Mechanical lock head 700, lock head cover 710.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 to 3, according to the utility model discloses a hidden components of a whole that can function independently lock for install on door body 600, include:

the electronic lock body 100 is embedded into the door body 600;

the control assembly 200 is used for controlling the electronic lock body 100 and is embedded into the door body 600, the control assembly 200 is provided with a controller 210, and the controller 210 is in signal connection with the electronic lock body 100;

the inductive reading head 300 has an insertion portion 310 that is inserted into the door body 600, and the insertion portion 310 of the inductive reading head 300 is electrically connected to the controller 210 through a conductive wire.

The electronic lock body 100 is a lock body which utilizes electric energy to control a lock switch, and can be a common motor lock body or an electric control lock body on the market, and the controller 210 of the control component 200 can control the on-off lock of the electronic lock body 100 through electric signals or wireless wifi signals, bluetooth signals and the like, so as to achieve the purpose of opening and locking a door. Specifically, the controller 210 transmits an electrical signal to the electronic lock body 100 through a wire, so that the electronic lock body performs a lock opening and closing operation. The electronic lock body 100 and the control assembly 200 are embedded into the door body 600 from the side surface of the door body 600, so that the lock tongue of the electronic lock body 100 can extend out from the side surface of the door body 600, and the functions of locking and unlocking the door are achieved. The control assembly 200 is separated from the electronic lock body 100, so that the structural strength of a hole dug by the door body 600 is better, and the hole cannot be damaged randomly; the extending portion 310 of the inductive reading head 300 extends into the door body 600 and is electrically connected to the controller 210, and the inductive reading head 300 is used for acquiring information of a magnetic card, that is, the switch of the electronic lock body 100 can be controlled by the magnetic card. One end of the inductive reading head 300, which is far away from the extending part 310, is exposed out of the door body 600, so that the magnetic card can be better sensed, and the magnetic card can be conveniently unlocked. Through setting up the inside electronic lock body 100 and the control assembly 200 of the embedding door body 600, the inside at door body 600 can all be hidden to the main part of control assembly 200 and electronic lock body 100 to need not install front panel and rear panel on door body 600, can reduce supporting of panel, it is more convenient to let the installation of tool to lock, avoid appearing the condition that the panel is outstanding on door body 600, and then let door body 600 after the installation tool to lock, wholly more succinct, more pleasing to the eye, satisfy customer's demand. It should be noted that the controller 210 may be an integrated control arithmetic unit having a control circuit, such as an MCU or a single chip microcomputer.

In some embodiments of the present invention, the extending portion 310 of the inductive reading head 300 is provided with the mounting rack 320 moving forward and backward, the control assembly 200 is provided with the rotating shaft seat 230 with the rotating shaft 220, the rotating shaft 220 is provided with the gear 240 matching with the mounting rack 320, the rotating shaft seat 230 is provided with the first threaded hole, the rotating shaft 220 is fixed on the rotating shaft seat 230 through the first pressing bolt 231 installed in the first threaded hole, the extending portion 310 is further provided with the sliding groove 330 moving forward and backward, and the rotating shaft seat 230 is slidably connected with the sliding groove 330. Here, the outdoor side of the door body 600 is referred to as the front side, and the indoor side is referred to as the rear side, as well as the following description. As shown in fig. 2 to 4, the mounting rack 320 is matched with the gear 240, the rotating shaft base 230 is slidably connected with the sliding groove 330 of the induction reading head 300 through a sliding fastening groove, wherein specifically, two sliding grooves 330 are respectively arranged at two sides of the induction reading head 300, when the induction reading head 300 is mounted, the induction reading head 300 is extended into the door body 600 from the outer side of the door body 600, the sliding groove 330 is slidably connected with the rotating shaft base 230 in the front-back direction, the moving direction of the induction reading head 300 is defined, then the rack is engaged with the gear 240, when the induction reading head 300 is extended into the door body 600 to a sufficient depth, the first pressing bolt 231 is screwed, the extending section of the first pressing bolt 231 presses the rotating shaft 220, so that the gear 240 is fixed, the induction reading head 300 can be fixed on the rotating shaft base 230, when the induction reading head 300 is mounted, an installer can directly extend the induction reading head 300 into the door body 600, when the preset depth is reached, the first pressing bolt 231 can be screwed, and the sensing reading head 300 is stably and fixedly mounted on the control assembly 200, so that the lock is more convenient to mount, the sensing reading head 300 can be prevented from easily falling off, and the lock can be prevented from being easily damaged by thieves.

In some embodiments of the present invention, the extension portion 340 is detachably connected to the rear end of the extension portion 310 of the inductive reading head 300, and the extension portion 340 is provided with an extension rack 341 connected to the mounting rack 320 and an extension groove 342 connected to the sliding groove 330. As shown in fig. 5, the extension portion 340 is used to extend the length of the extending portion 310 of the inductive reading head 300, and by increasing the length of the extending portion 310, when the lock is used to install a thicker door body 600, the extending portion 310 can extend deeper, and the sliding groove 330 and the installation rack 320 of the extending portion 310, and the extension groove 342 and the extension rack 341 of the extension portion 340 can better contact with the rotating shaft base 230, so that the inductive reading head 300 can be better fixed, and the use of the lock can be ensured.

Specifically, a T-shaped groove is formed at one end of the extending portion 310 close to the extending portion 340, and a T-shaped projection matched with the T-shaped groove is formed at one side of the extending portion 340 close to the extending portion 310, so that the extending portion 340 can be better slidably buckled on the extending portion 310 to complete fixation, and the extending portion 340 can be directly slid out of the T-shaped groove during disassembly, thereby facilitating disassembly; through the cooperation of T type groove and T type lug, can prolong the length of portion 310 of stretching into effectively to let the inductive reading head 300 fix on the pivot seat 230 better, guarantee the use of tool to lock.

It is understood that the extension portion 310 and the extension portion 340 can be detachably connected by a bolt-fit connection or a snap-fit connection, but not limited thereto.

In some embodiments of the present invention, the end of the inductive reading head 300 remote from the protruding portion 310 is provided with a decorative lens 350. As shown in fig. 1 and 5, the end of the induction reading head 300 far away from the extending portion 310 is the end of the induction reading head 300 located on the surface of the door body 600, which is exposed out of the door body 600, so that the induction magnetic card can be conveniently induced, and the end of the induction reading head 300 exposed out of the door body 600 can be decorated by arranging the decorative lens 350, so that the induction reading head 300 is more attractive and simpler to install on the door body 600, and the requirements of customers are met.

In some embodiments of the present invention, as shown in fig. 4, the control assembly 200 includes a mounting shell 250, the rotating shaft seat 230 is provided with a waist-shaped hole 260, and the rotating shaft seat 230 is mounted on the mounting shell 250 through a second pressing bolt 270 passing through the waist-shaped hole 260. The second pressing bolt 270 is fixed on the mounting shell 250, the second pressing bolt 270 passes through the waist-shaped hole 260, the position of the rotating shaft seat 230 can be adjusted through the matching of the waist-shaped hole 260 and the second pressing bolt 270, and when the position required by a user is adjusted, the second pressing bolt 270 can be screwed, so that the rotating shaft seat 230 is clamped between the screw nut and the mounting shell 250.

It can be understood that the mounting shell 250 can be provided with a screw hole matched with the second pressing bolt 270, so that the second pressing bolt 270 can directly clamp and fix the rotating shaft seat 230 on the mounting shell 250, and the rotating shaft seat 230 can be better fixed.

In some embodiments of the present invention, as shown in fig. 3 and 4, the mounting case 250 is provided with a battery case 280, and the battery case 280 is electrically connected to the controller 210. The battery box 280 is used for accommodating a battery, and provides electric energy for the controller 210, the electronic lock body 100 and the inductive reading head 300, so as to ensure the normal use of the lock.

In some embodiments of the utility model, as shown in fig. 1, fig. 2, fig. 7, still including the handle 400 and the handle lid 500 of opening the door, the handle 400 of opening the door is connected with electronic lock body 100 through handle axle 410, and handle lid 500 is provided with mounting hole 510, and handle lid 500 is fixed on electronic lock body 100 through the connecting piece that passes mounting hole 510. The handle shaft 410 of the door opening handle 400 is connected to the door opening square bar of the electronic lock body 100, so that the door opening handle 400 can be unlocked or locked. The connecting piece can be the part that bolt, pin etc. can carry out the connection, can let handle cover 500 install on the lock body, lets handle cover 500 closing cover the space between door opening handle 400 and the lock body, avoids scoundrel to destroy door opening handle 400 or lock body, guarantees the normal use of tool to lock.

In some embodiments of the present invention, as shown in fig. 6 and 7, the handle shaft 410 is provided with a first torsion spring limiting plate 420 rotating coaxially at the inner side of the handle cover 500, one side of the first torsion spring limiting plate 420 close to the handle cover 500 is provided with a first torsion spring limiting block 421, the handle shaft 410 is sleeved with a second torsion spring limiting plate 430 between the first torsion spring limiting plate 421 and the handle cover 500, a handle torsion spring 440 is sleeved between the second torsion spring limiting plate 430 and the first torsion spring limiting plate 420, one side of the second torsion spring limiting plate 430 close to the first torsion spring limiting block 421 is provided with a second torsion spring limiting block 431, and the second torsion spring limiting plate 430 is mounted on the handle cover 500 through a screw 450; when the door opening handle 400 is in a standing state, two torsion arms of the handle torsion spring 440 are respectively abutted against the first torsion spring limiting block 421 and the second torsion spring limiting block 431. When handle 400 stews opening the door promptly, first torsion spring stopper 421 and second torsion spring limiting plate 430 all are in the same position of handle axle 410, also be exactly first torsion spring stopper 421 and second torsion spring limiting plate 430 in the same footpath of handle axle 410, the user rotates handle 400 opening the door toward arbitrary direction like this, first torsion spring stopper 421 all can drive one of them torque arm of handle torsional spring 440 and rotate, second torsion spring stopper 431 all can support another torque arm, then handle 400 opening the door can be after opening the door, reset reliably, the production in virtual position clearance can not have.

In some embodiments of the present invention, as shown in fig. 7, the second torsion spring limiting plate 430 is provided with a plurality of positioning holes 432 around the handle shaft 410, the handle cover 500 is provided with a second threaded hole matched with the screw 450, and the screw 450 is mounted on the second threaded hole through one of the positioning holes 432. When the screw 450 passes through one of different positioning holes 432, the relative position between the second torsion spring limiting block 431 and the handle cover 500 can be changed, namely, the relative position between the door opening handle 400 and the mounting hole 510 can be changed, so as to match the reserved hole positions on different lock bodies, if the reserved hole positions of the lock bodies of American standard and European standard are different from the horizontal angle, the relative position between the door opening handle 400 and the mounting hole 510 can be adjusted by selecting different positioning holes 432, and therefore the purpose that the door opening handle 400 is kept static horizontally after the handle cover 500 is installed is achieved.

In some embodiments of the present invention, as shown in fig. 7, the second torsion spring limiting plate 430 is provided with an avoiding gap 433 for avoiding the connecting member. Avoiding the opening 433 can ensure that when the positioning hole 432 is selected for use, the second torsion spring limiting plate 430 can rotate conveniently, and the relative position between the door opening handle 400 and the mounting hole 510 can be adjusted conveniently.

Specifically, there is a mechanical lock 700 for unlocking, the mechanical lock 700 is connected with the electronic lock body 100, protrudes from the front door, and is closed by the lock cover 710

Other constructions and operations of the concealed split lock according to embodiments of the present invention are known to those skilled in the art and will not be described in detail herein.

A concealed type split lock according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 7 as a specific embodiment. It is to be understood that the following description is illustrative only and is not intended as a specific limitation on the invention.

Electronic lock body 100 imbeds the inside of a body 600, the inside of the body 600 is imbedded to control assembly 200, the outside that the handle 400 is located a body 600 opens the door, handle cover 500 is used for sealing the space between handle 400 and the lock body opens the door, the one end that the response read head 300 is located a body 600 surface has decorative lens 350, and be located the top of the handle that opens the door, response read head 300 passes through wire connection control assembly 200's controller 210, controller 210 passes through wire connection electronic lock body 100, thereby let response read head 300 when reading the magnetic card that opens the door, can let electronic lock body 100 unblank, then rotate the handle 400 that opens the door and open the door. When the hidden lock is installed, the electronic lock body 100 is installed from the side of the door body 600, then the lead of the controller 210 is connected with the electronic lock body 100, the installation control assembly 200 is installed on the side of the door body 600, then the installation rack 320 of the induction reading head 300 is meshed with the gear 240, the sliding groove 330 on the induction reading head 300 is connected with the rotating shaft seat 230 in a sliding mode, the rotating shaft 220 is fixed through the first compression bolt 231, the induction reading head 300 is fixed, finally the control assembly 200 is sealed inside the door body 600 through the sealing cover plate, the door opening handle 400 and the handle cover 500 are installed, and the whole installation is completed. After the installation of this hidden components of a whole that can function independently lock is accomplished, door body 600 does not have front panel or rear panel, can be with the supporting of reducing the panel, and it is more convenient to let the installation of tool to lock, avoids appearing the outstanding condition on with the door body 600 of panel, and then lets door body 600 after the installation tool to lock, and is whole more brief, more pleasing to the eye, satisfies customer's demand.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A hidden split lock for mounting on a door body (600), comprising:

the electronic lock body (100) is embedded into the door body (600);

the control assembly (200) is used for controlling the electronic lock body (100) and embedded into the door body (600), the control assembly (200) is provided with a controller (210), and the controller (210) is in signal connection with the electronic lock body (100);

the induction reading head (300) is provided with an extending part (310) extending into the door body (600), and the extending part (310) of the induction reading head (300) is electrically connected with the controller (210) through a lead.

2. A concealed, split lock according to claim 1, wherein: the utility model discloses an induction reading head, including sensing reading head (300) stretch into portion (310) and be provided with the installation rack (320) that move towards from beginning to end, control assembly (200) are provided with pivot seat (230) that have axis of rotation (220), axis of rotation (220) be provided with gear (240) that installation rack (320) match, pivot seat (230) are provided with first screw hole, axis of rotation (220) are fixed through installing first housing bolt (231) of first screw hole on pivot seat (230), stretch into portion (310) still are provided with spout (330) that move towards from beginning to end, pivot seat (230) with spout (330) sliding connection.

3. A concealed, split lock according to claim 2, wherein: the rear end of the extending part (310) of the induction reading head (300) is detachably connected with an extending part (340), and the extending part (340) is provided with an extending rack (341) connected with the mounting rack (320) and an extending groove (342) connected with the sliding groove (330).

4. A concealed, split lock according to claim 2, wherein: and a decorative lens (350) is arranged at one end of the induction reading head (300) far away from the extending part (310).

5. A concealed, split lock according to claim 2, wherein: the control assembly (200) comprises an installation shell (250), the rotating shaft seat (230) is provided with a waist-shaped hole (260), and the rotating shaft seat (230) is installed on the installation shell (250) through a second compression bolt (270) penetrating through the waist-shaped hole (260).

6. The concealed split lock according to claim 5, wherein: the mounting shell (250) is provided with a battery box (280), and the battery box (280) is electrically connected with the controller (210).

7. A concealed, split lock according to claim 1, wherein: still including handle (400) and handle lid (500) open the door, handle (400) open the door through handle axle (410) with electronic lock body (100) are connected, handle lid (500) are provided with mounting hole (510), handle lid (500) are through passing the connecting piece of mounting hole (510) is fixed on the electronic lock body (100).

8. The concealed split lock according to claim 7, wherein: a first torsion spring limiting plate (420) which coaxially rotates is arranged at the inner side of the handle cover (500) of the handle shaft (410), a first torsion spring limiting plate (421) is arranged at one side, close to the handle cover (500), of the first torsion spring limiting plate (420), a second torsion spring limiting plate (430) is sleeved between the first torsion spring limiting plate (421) and the handle cover (500) of the handle shaft (410), a handle torsion spring (440) is sleeved between the second torsion spring limiting plate (430) and the first torsion spring limiting plate (420), a second torsion spring limiting plate (431) is arranged at one side, close to the first torsion spring limiting plate (421), of the second torsion spring limiting plate (430), and the second torsion spring limiting plate (430) is installed on the handle cover (500) through a screw (450); when the door-opening handle (400) is in standing, two torsion arms of the handle torsion spring (440) are respectively abutted against the first torsion spring limiting block (421) and the second torsion spring limiting block (431).

9. The concealed split lock according to claim 8, wherein: the second torsion spring limiting plate (430) is provided with a plurality of positioning holes (432) around the handle shaft (410), the handle cover (500) is provided with a second threaded hole matched with the screw (450), and the screw (450) is mounted on the second threaded hole through one of the positioning holes (432).

10. The concealed split lock according to claim 8, wherein: the second torsion spring limiting plate (430) is provided with an avoidance gap (433) for avoiding the connecting piece.