CN211666485U - Locking device - Google Patents

Abstract

The utility model belongs to the technical field of locks, in particular to a locking device, which comprises a base, a handle, a transmission mechanism and a lock head component; the base and the lock head assembly are arranged on the door leaf; the handle is mounted on the base; the transmission mechanism is respectively connected with the handle and the lock head assembly. The utility model discloses in, the pedestal mounting is on the door leaf, and the handle is installed on the base, and drive mechanism one end links to each other with the handle, and the other end links to each other with the tapered end subassembly of installing on the door leaf, thereby tapered end subassembly can link to each other locking or unblock door leaf with the door frame. One end of the transmission mechanism is connected with the handle, and the other end of the transmission mechanism can be connected with the plurality of lock head assemblies, so that the handle can simultaneously control the unlocking or locking of the plurality of lock head assemblies, the locking effect is improved, and the firmness and the reliability during locking are improved.

Description

Locking device

Technical Field

The utility model belongs to the technical field of the tool to lock, particularly, the utility model relates to a blocking device.

Background

The lockset is an appliance with a sealing function, and is an essential appliance in daily production and life. Common application scenarios are many, such as locking a cabinet, locking a door, locking a suitcase, and the like. Among them, the lockset is used as a door lock on a door as a general purpose.

When the lockset is used as a door lock, the most common is that one handle controls one lock head to unlock or lock, namely, the door leaf and the door frame are connected through one lock head to play a door locking effect, and the locking effect is not ideal.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model provides a locking device, its technical scheme as follows:

a locking device comprises a base, a handle, a transmission mechanism and a lock head assembly; the base and the lock head assembly are arranged on the door leaf; the handle is mounted on the base; the transmission mechanism is respectively connected with the handle and the lock head assembly.

The above-described locking device is more preferably: the base comprises a first mounting plate, a second mounting plate and a shaft sleeve; the first mounting plate and the second mounting plate are respectively mounted on the inner side and the outer side of the door leaf; the shaft sleeve is arranged in the door leaf, one end of the shaft sleeve penetrates through the first mounting plate and is fixedly connected with the first mounting plate, and the other end of the shaft sleeve penetrates through the second mounting plate and is fixedly connected with the second mounting plate.

The above-described locking device is more preferably: the handles comprise a first outer handle, a second outer handle and an inner handle; the first outer handle and the second outer handle are respectively connected with the inner handle, and the inner handle is installed in the base and is rotatably connected with the base.

The above-described locking device is more preferably: the inner handle is rotatably connected with the base through a bearing; the inner handle is provided with a polygonal end part which is inserted into the first outer handle; and a positioning screw is arranged on the first outer handle and connected with the polygonal end part.

The above-described locking device is more preferably: and two ends of the inner handle are respectively rotatably connected with the base through the bearings.

The above-described locking device is more preferably: the polygonal end part is a regular polygon and is provided with a taper along the axis direction.

The above-described locking device is more preferably: and a bearing retainer ring and a retainer ring nut are arranged between the polygonal end part and the bearing, the bearing retainer ring is connected with the bearing, and the retainer ring nut is connected with the bearing retainer ring.

The above-described locking device is more preferably: the lock head assembly comprises a locking seat, a locking head and a return spring; the locking seat is arranged on the door leaf; the locking head is arranged in the locking seat and is in sliding fit with the locking seat; the reset spring is installed in the locking seat, one end of the reset spring is connected with the locking seat, and the other end of the reset spring is connected with the locking head.

The above-described locking device is more preferably: and a locking gasket is arranged between the locking seat and the door leaf and used for adjusting the installation position of the locking seat.

The above-described locking device is more preferably: and a locking copper sleeve is arranged in the locking seat and is in sliding fit with the locking head.

The above-described locking device is more preferably: one end of the locking head is a wedge-shaped end, and the wedge-shaped end is used for being inserted into the lock hole.

The above-described locking device is more preferably: the locking head is provided with a guide key, and the guide key is in sliding fit with the locking seat and used for providing sliding guide for the locking head.

The above-described locking device is more preferably: and an oil cup is arranged on the locking seat and is used for injecting oil between the locking seat and the locking head.

The above-described locking device is more preferably: the transmission mechanism comprises a rotating arm plate arranged on the handle and a connecting rod connected with the rotating arm plate; the rotating arm plate comprises a first opening and a second opening, the handle is inserted into the first opening, one end of the connecting rod is rotatably connected with the second opening, and the other end of the connecting rod is directly or indirectly connected with the lock head assembly; the connecting rod is one or more, and with the tapered end subassembly one-to-one corresponds.

The above-described locking device is more preferably: the number of the connecting rods is an even number not less than 2; half of the connecting rods are positioned above the handle, and the other half of the connecting rods are positioned below the handle; the connecting rod above the handle and the connecting rod below the handle are distributed in a central symmetry manner with respect to the first opening.

The above-described locking device is more preferably: the connecting rod comprises a rod body, a movable rod head and a rod head nut; the rod body is in threaded connection with the movable rod head; the rod head nut is arranged on the rod body and connected with the movable rod head.

The above-described locking device is more preferably: one end of the rod body is in threaded connection with the movable rod head, and the other end of the rod body is provided with a fixed rod head.

The above-described locking device is more preferably: the movable rod head or the fixed rod head is hinged with the second opening.

The above-described locking device is more preferably: the lock head assembly is hinged with the transmission mechanism.

The above-described locking device is more preferably: the transmission mechanism is connected with the lock head assembly through the plectrum assembly; the shifting piece assembly comprises a fixed shaft, a lock head shifting piece, a shifting piece retainer ring, a fastening nut and a nut split pin; the fixed shaft is arranged on the door leaf and used for providing an installation position; the lock head shifting piece is rotatably connected with the fixed shaft, one end of the lock head shifting piece is hinged with the transmission mechanism, and the other end of the lock head shifting piece is sleeved on the lock head assembly; the shifting piece retainer ring is arranged on the fixed shaft and connected with the lock head shifting piece, and the fastening nut is arranged on the fixed shaft and connected with the shifting piece retainer ring; the nut cotter pin is mounted on the fastening nut.

The above-described locking device is more preferably: the lock head shifting piece is further provided with a limiting device used for abutting against the lock head assembly during action, the limiting device comprises a limiting bolt and a limiting nut, the limiting bolt is in threaded connection with the lock head shifting piece, and the limiting nut is in threaded connection with the limiting bolt.

The above-described locking device is more preferably: and a shifting sheet copper sleeve is arranged at the rotatable connection part of the fixed shaft and the lock head shifting sheet.

The above-described locking device is more preferably: and the two sides of the lock head shifting piece are provided with shifting piece adjusting gaskets which are arranged on the fixed shaft.

The analysis can know, compare with prior art, the utility model discloses an advantage and beneficial effect lie in:

the utility model provides an among the locking device, the pedestal mounting is on the door leaf, and the handle is installed on the base, and drive mechanism one end links to each other with the handle, and the other end links to each other with the tapered end subassembly of installing on the door leaf, thereby tapered end subassembly can link to each other locking or unblock door leaf with the door frame. One end of the transmission mechanism is connected with the handle, and the other end of the transmission mechanism can be connected with the plurality of lock head assemblies, so that the handle can simultaneously control the unlocking or locking of the plurality of lock head assemblies, the locking effect is improved, and the firmness and the reliability during locking are improved.

Furthermore, in the utility model, the lock head component is provided with a return spring which can automatically return; the locking copper sleeve and the guide key are arranged, so that the movement precision can be improved; the oil cup is arranged, so that the abrasion of the locking copper sleeve and the locking head can be reduced. The length of the connecting rod of the transmission mechanism is adjustable, so that the assembly difficulty can be reduced; the quantity of connecting rod can set up in a flexible way, can select the use quantity of tapered end subassembly according to actual demand, reaches the purpose of a plurality of tapered end subassemblies of handle drive. The lock head assembly and the transmission mechanism can be directly connected or indirectly connected, and the implementation scheme can be enriched.

Drawings

Fig. 1 is a first schematic view of the installation of the locking device of the present invention.

Fig. 2 is a cross-sectional view at a-a of fig. 1.

Fig. 3 is a cross-sectional view at B-B of fig. 1.

Fig. 4 is a cross-sectional view at C-C of fig. 1.

Fig. 5 is a cross-sectional view at D-D of fig. 4.

Fig. 6 is a second schematic view of the installation of the locking device of the present invention.

Fig. 7 is a cross-sectional view at E-E of fig. 6.

In the figure: 1-a lock cylinder assembly; 101-a locking seat; 102-a latch head; 103-a return spring; 104-a locking washer; 105-locking the copper sleeve; 106-a guide key; 107-oil cup; 2-a plectrum assembly; 201-a lock head plectrum; 202-shifting sheet copper sleeve; 203-a fixed shaft; 204-plectrum adjusting shim; 205-fastening a nut; 206-nut cotter pin; 207-a pick collar; 3-a transmission mechanism; 301-a swing arm plate; 302-a rod body; 303-a movable head; 4-a base; 401-a first mounting plate; 402-a second mounting plate; 403-shaft sleeve; 5-door leaf; 6-a handle; 601-a first outer handle; 602-a second outer handle; 603-inner handle; 604-a bearing; 605-a bearing ring; 606-a retainer nut; 607-set screw.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention and do not require that the present invention must be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense, and may be, for example, either fixed or detachable; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.

Please refer to fig. 1 to 7, wherein fig. 1 is a first schematic view illustrating an installation of a locking device according to the present invention; FIG. 2 is a cross-sectional view at A-A of FIG. 1; FIG. 3 is a cross-sectional view at B-B of FIG. 1; FIG. 4 is a cross-sectional view at C-C of FIG. 1; FIG. 5 is a cross-sectional view taken at D-D of FIG. 4; fig. 6 is a second schematic view of the installation of the locking device of the present invention; fig. 7 is a cross-sectional view at E-E of fig. 6.

As shown in fig. 1 and 6, the present invention provides a locking device, which comprises a base 4, a handle 6, a transmission mechanism 3 and a lock assembly 1; the base 4 and the lock head assembly 1 are arranged on the door leaf 5; the handle 6 is arranged on the base 4; the transmission mechanism 3 is respectively connected with the handle 6 and the lock head assembly 1.

Particularly, the utility model provides an among the locking device, base 4 is installed on door leaf 5, and handle 6 is installed on base 4, and 3 one end of drive mechanism link to each other with handle 6, and the other end links to each other with tapered end subassembly 1 of installing on door leaf 5, thereby tapered end subassembly 1 can link to each other locking or unblock door leaf 5 with the door frame. The utility model discloses in, 3 one ends of drive mechanism link to each other with handle 6, and the other end can link to each other with a plurality of tapered end subassemblies 1 to can realize a plurality of tapered end subassemblies of 6 simultaneous control of a handle unblocks or locking, improve the locking effect, fastness and reliability when improving the locking.

Further, as shown in fig. 1, 4 and 5, in the present invention, the base 4 includes a first mounting plate 401, a second mounting plate 402 and a shaft sleeve 403; the first mounting plate 401 and the second mounting plate 402 are respectively installed on the inner side and the outer side of the door leaf 5, preferably, the first mounting plate 401 is installed below the inner surface of the door leaf 5, and the second mounting plate 402 is installed below the outer surface of the door leaf 5, that is, both the first mounting plate 401 and the second mounting plate 402 are installed inside the door leaf 5. The shaft sleeve 403 is installed in the door leaf 5, and has one end penetrating through the first mounting plate 401 and fixedly connected with the first mounting plate 401, for example, welded connection or interference fit connection, and the other end penetrating through the second mounting plate 402 and fixedly connected with the second mounting plate 402, for example, welded connection or interference fit connection. The first mounting plate 401, the second mounting plate 402 and the bushing 403 are combined into a whole, which can provide mounting and rotating space for the rotating movement of the handle 6.

In the present invention, the handle 6 is installed in the base 4, specifically in the shaft sleeve 403, and rotatably connected to the shaft sleeve 403. The handle 6 includes a first outer handle 601, a second outer handle 602, and an inner handle 603; the first outer handle 601 and the second outer handle 602 are respectively connected with an inner handle 603, and the inner handle 603 is installed in the shaft sleeve 403 of the base 4 and is rotatably connected with the shaft sleeve 403. In the rotatable connection scheme, preferably, the inner handle 603 is rotatably connected with the shaft sleeve 403 through a bearing 604, that is, the inner handle 603 and the shaft sleeve 403 are movably connected through a mounting bearing 604, and meanwhile, in order to balance the loads at two ends when the handle 6 rotates, two bearings 604 are respectively sleeved at two ends of the inner handle 603, and are connected with the shaft sleeve 403 through the two bearings 604.

The utility model discloses a handle 6 includes first outer handle 601, the outer handle 602 of second and interior handle 603, and handle 6 is whole to be the U type, is convenient for operate from the inside and outside both sides of door leaf 5 when installing on base 4. In order to facilitate the installation of the handle 6 on the base 4, the utility model discloses a joint and the mode of fastening realize the connection between the first outer handle 601, the second outer handle 602, the interior handle 603. Specifically, interior handle 603 is equipped with the polygon tip, and the polygon tip alternates in first outer handle 601, is connected with first outer handle 601 joint to can realize rotating with first outer handle 601 is synchronous. Be equipped with set screw 607 on first outer handle 601, set screw 607 and polygon tip threaded connection to can guarantee the fastness of being connected in interior handle 603 axis direction between first outer handle 601 and the interior handle 603. Preferably, the polygonal end is a regular polygon, which is convenient for processing and manufacturing, and the polygonal end is provided with a taper along the axial direction, which is convenient for inserting into the first outer handle 601.

When implementing, in order to reduce assembly work load, interior handle 603 links to each other with first outer handle 601 through polygon tip, and second outer handle 602 is the integral type structure with interior handle 603 to can remove the assembly link between second outer handle 602 and the interior handle 603, reduce simultaneously the utility model discloses a spare part total amount. Specifically, when the device is installed, a bearing retainer ring 605 is installed between a bearing 604 close to the second outer handle 602 and the second outer handle 602, one end of the bearing retainer ring 605 abuts against the second outer handle 602, and the other end abuts against the bearing 604; a bearing retainer ring 605 and a retainer ring nut 606 are arranged between the polygonal end part and the bearing 604, one end of the bearing retainer ring 605 abuts against the bearing 604, the other end of the bearing retainer ring 605 abuts against the retainer ring nut 606, and the retainer ring nut 606 is in threaded connection with the inner handle 603 and can play a role in fixing the bearing 604.

Further, as shown in fig. 1 and 2, in the present invention, the lock cylinder assembly 1 includes a locking seat 101, a locking head 102 and a return spring 103; the locking seat 101 is installed on the door leaf 5, specifically on the inner side of the door leaf 5, and can provide installation positions for the locking head 102 and the return spring 103; the locking head 102 is installed in the locking seat 101 and is in sliding fit with the locking seat 101, so that locking and unlocking can be realized; the return spring 103 is installed in the locking seat 101, one end of the return spring is connected to the locking seat 101, the other end of the return spring is connected to the locking head 102, and the return spring 103 is always in a compressed state in the locking seat 101, so that the return power can be provided for the locking head 102 (the return means that the return spring 103 can enable the locking head 102 to be in a locking state under the action of elastic force).

Preferably, in the present invention, a locking gasket 104 is disposed between the locking seat 101 and the door leaf 5, and by adjusting the thickness of the locking gasket 104, the installation position of the locking seat 101 at the inner side of the door leaf 5, i.e. the distance between the locking seat 101 and the inner surface of the door leaf 5, can be adjusted, and then the installation position of the locking head 102 can be adjusted.

Meanwhile, in order to facilitate smooth operation of the lock head assembly 1, a locking copper sleeve 105 is arranged at the sliding fit position of the locking head 102 in the locking seat 101, and the locking copper sleeve 105 is installed in the locking seat 101 in an interference fit mode and is in sliding fit with the locking head 102, so that the precision of the locking head 102 during translation can be improved. To facilitate the entry and exit of the latch head 102 into and out of the lock hole, the end of the latch head 102 that mates with the lock hole is wedge-shaped. In order to ensure the translational precision of the locking head 102 and prevent the locking head 102 from twisting during translational motion, the utility model discloses be equipped with the guide key 106 on the locking head 102, the guide key 106 is connected with the locking head 102 interference fit to with the sliding fit of locking seat 101, can provide sliding guide for the locking head 102. As a maintenance structure of the latch head assembly 1, an oil cup 107 is provided on the latch base 101, and oil can be injected between the latch base 101 and the latch head 102, so that oil lubrication or grease lubrication is constantly maintained between the latch base 101 (the latch copper 105 on the latch base 101) and the latch head 102, thereby reducing wear of the latch copper 105 and the latch head 102.

Further, as shown in fig. 1 and 6, in the present invention, the transmission mechanism 3 includes a rotating arm plate 301 mounted on the handle 6 and a connecting rod connected to the rotating arm plate 301; the swing arm plate 301 comprises a first opening and a second opening, the handle 6 is inserted into the first opening and is in interference fit with the first opening, one end of the connecting rod is rotatably connected with the second opening, and the other end of the connecting rod is directly or indirectly connected with the lock head assembly 1. When the locking head is used, the rotating arm plate 301 is driven to rotate through the handle 6, the rotating arm plate 301 drives the connecting rod to move, and then the locking head 102 is driven to leave the locking hole; when the first outer handle 601 and/or the second outer handle 602 do not receive force directly, the return spring 103 drives the locking head 102 to return, and thus the handle 6 is driven to return through the connecting rod.

For the convenience of assembly, the connecting rod comprises a rod body 302, a movable rod head 303 and a rod head nut; the body of rod 302 and activity pole head 303 threaded connection, through adjusting the length of pole body 302 and activity pole head 303 threaded connection, can finely tune the length of connecting rod to can eliminate the assembly problem that assembly error and/or manufacturing error brought, reduce the assembly degree of difficulty. Simultaneously, for the length of messenger's connecting rod remains unchanged after the assembly, the utility model discloses a mode of two nut fastenings locks the length of connecting rod, and head nut installs on body of rod 302 promptly to link to each other with activity pole head 303, head nut supports and leans on activity pole head 303, thereby forms the fastening structure of two nut fastenings together with activity pole head 303. In practice, one connecting rod may be provided with one movable rod head 303, or two movable rod heads 303. Preferably, one connecting rod is provided with a movable rod head 303, one end of the rod body 302 is in threaded connection with the movable rod head 303, and the other end of the rod body 302 is provided with a fixed rod head, so that the assembly workload can be reduced. The movable rod head 303 or the fixed rod head is hinged with the second opening.

In the embodiment, the number of the connecting rods may be one or more. When the connecting rod is one, a handle 6 corresponds a connecting rod, corresponds a tapered end subassembly 1 simultaneously, and a handle 6 drives a tapered end subassembly 1 promptly, can lock door leaf 5 at a side of door leaf 5. When the connecting rod is a plurality of, a handle 6 corresponds a plurality of connecting rods and a plurality of tapered end subassembly 1, and the quantity of connecting rod and tapered end subassembly 1 equals, the one-to-one, a handle 6 drives a plurality of tapered end subassemblies 1 action this moment, can lock door leaf 5 at a side of door leaf 5, also can lock door leaf 5 at two sides of door leaf 5, can also lock door leaf 5 at three side or four sides of door leaf 5.

Preferably, the number of the connecting rods is an even number not less than 2; half of the connecting rods are positioned above the handle 6, and the other half of the connecting rods are positioned below the handle 6; the connecting rod above the handle 6 and the connecting rod below the handle 6 are distributed in central symmetry with respect to the first opening, so that the door leaf 5 is stressed evenly when being locked.

Further, as shown in fig. 1 to 7, in the present invention, the lock assembly 1 and the transmission mechanism 3 may be directly connected or indirectly connected. When the locking head is directly connected with the handle 6, the transmission mechanism 3 is driven to act by the handle 6, so that the locking head 102 is driven to act by the transmission mechanism 3; when indirectly connected, the handle 6 drives the actuator 3, which in turn drives the locking head 102 via the medium, to move the actuator 3.

As an embodiment in which the lock cylinder assembly 1 is directly connected to the transmission mechanism 3, as shown in fig. 1 to 5, the lock cylinder assembly 1 is hingedly connected to the transmission mechanism 3. In an embodiment, the rotating arm plate 301 is mounted on the second outer handle 602, and is snap-fitted to the second outer handle 602 to rotate synchronously with the rotation of the handle 6 along the axial direction of the inner handle 603. One end of the connecting rod is hinged with the rotating arm plate 301, and the other end is hinged with the locking head 102. When the locking head is used, the handle 6 drives the rotating arm plate 301 to rotate, and the rotating arm plate 301 drives the connecting rod to move, so that the locking head 102 is driven to translate to the position of the connecting rod.

As an embodiment of the indirect connection between the lock cylinder assembly 1 and the transmission mechanism 3, as shown in fig. 6 and 7, the lock cylinder assembly 1 and the transmission mechanism 3 are indirectly connected through the pick assembly 2. The plectrum assembly 2 comprises a fixed shaft 203, a lock head plectrum 201, a plectrum retainer ring 207, a fastening nut 205 and a nut cotter pin 206; the fixed shaft 203 is arranged on the door leaf 5 and can provide an installation position; the lock pick 201 is rotatably connected with the fixed shaft 203, one end of the lock pick is hinged with the transmission mechanism 3, the other end of the lock pick is sleeved on the locking head 102 of the lock assembly 1, and the locking head 102 can be pulled so as to enable the locking head 102 to move horizontally; the shifting block retainer ring 207 is arranged on the fixed shaft 203, is connected with the lock head shifting block 201, and can limit the lock head shifting block 201 in the axial direction of the fixed shaft 203; the fastening nut 205 is arranged on the fixed shaft 203, is in threaded connection with the fixed shaft 203, is connected with the shifting sheet retainer ring 207, and can limit the shifting sheet retainer ring 207; the nut cotter pin 206 is attached to the fastening nut 205, and can lock the fastening nut 205.

Preferably, the lock pick 201 is further provided with a limiting device which can abut against the lock assembly 1 during action to prevent the return spring 103 from being excessively compressed to reduce the fatigue life. The limiting device comprises a limiting bolt and a limiting nut, the limiting bolt is in threaded connection with the lock head shifting piece 201, and the limiting nut is in threaded connection with the limiting bolt and can lock the limiting bolt. During installation, the longest translational distance of the locking head 102 during action can be adjusted by adjusting the extension length of the limit bolt on the lock head plectrum 201, so that the maximum compression amount of the return spring 103 during use can be adjusted.

Meanwhile, in order to improve the motion precision of the lock head shifting piece 201 and reduce the abrasion, as shown in the figure, a shifting piece copper sleeve 202 is arranged at the rotatable connection part of the lock head shifting piece 201 and the fixed shaft 203. In order to facilitate the adjustment of the length of the lock pick 201 from the inner surface of the door leaf 5, the utility model discloses in, the both sides of the lock pick 201 are equipped with pick adjusting gasket 204, and pick adjusting gasket 204 is installed on the fixed axle 203, can adjust the position of the lock pick 201 to can make the lock pick 201 and the locking head 102, the transmission mechanism 3 move in a plane, operate smoothly laborsavingly.

It should be noted that, in the hinge connection of the present invention, the movable rod head 303, the rotating arm plate 301, the lock pick 201, the fixed rod head, and the locking head 102 are all connected in series by the pin when hinged, and then are locked on the pin by the split pin (the split pin is shown by the short line segment in fig. 3, fig. 4, and fig. 7), so as to realize the hinge connection.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of the invention or which are equivalent to the scope of the invention are embraced by the invention.

Claims (10)

1. A lockout device, comprising:

the lock comprises a base, a handle, a transmission mechanism and a lock head assembly;

the base and the lock head assembly are arranged on the door leaf; the handle is mounted on the base; the transmission mechanism is respectively connected with the handle and the lock head assembly.

2. The lockout device of claim 1, wherein:

the base comprises a first mounting plate, a second mounting plate and a shaft sleeve;

the first mounting plate and the second mounting plate are respectively mounted on the inner side and the outer side of the door leaf; the shaft sleeve is arranged in the door leaf, one end of the shaft sleeve penetrates through the first mounting plate and is fixedly connected with the first mounting plate, and the other end of the shaft sleeve penetrates through the second mounting plate and is fixedly connected with the second mounting plate.

3. The lockout device of claim 1, wherein:

the handles comprise a first outer handle, a second outer handle and an inner handle; the first outer handle and the second outer handle are respectively connected with the inner handle, and the inner handle is installed in the base and is rotatably connected with the base.

4. A latch defined by claim 3 wherein:

the inner handle is rotatably connected with the base through a bearing;

the inner handle is provided with a polygonal end part which is inserted into the first outer handle; a positioning screw is arranged on the first outer handle and connected with the polygonal end part;

two ends of the inner handle are respectively rotatably connected with the base through the bearings;

the end part of the polygon is a regular polygon, and a taper is arranged along the axis direction;

and a bearing retainer ring and a retainer ring nut are arranged between the polygonal end part and the bearing, the bearing retainer ring is connected with the bearing, and the retainer ring nut is connected with the bearing retainer ring.

5. The lockout device of claim 1, wherein:

the lock head assembly comprises a locking seat, a locking head and a return spring;

the locking seat is arranged on the door leaf; the locking head is arranged in the locking seat and is in sliding fit with the locking seat; the reset spring is arranged in the locking seat, one end of the reset spring is connected with the locking seat, and the other end of the reset spring is connected with the locking head;

a locking gasket is arranged between the locking seat and the door leaf and used for adjusting the installation position of the locking seat;

a locking copper sleeve is arranged in the locking seat and is in sliding fit with the locking head;

one end of the locking head is a wedge-shaped end, and the wedge-shaped end is used for being inserted into the lock hole.

6. The lockout device of claim 5, wherein:

the locking head is provided with a guide key, and the guide key is in sliding fit with the locking seat and is used for providing sliding guide for the locking head;

and an oil cup is arranged on the locking seat and is used for injecting oil between the locking seat and the locking head.

7. The lockout device of claim 1, wherein:

the transmission mechanism comprises a rotating arm plate arranged on the handle and a connecting rod connected with the rotating arm plate;

the rotating arm plate comprises a first opening and a second opening, the handle is inserted into the first opening, one end of the connecting rod is rotatably connected with the second opening, and the other end of the connecting rod is directly or indirectly connected with the lock head assembly; one or more connecting rods are arranged and correspond to the lock head assemblies one by one;

the number of the connecting rods is an even number not less than 2; half of the connecting rods are positioned above the handle, and the other half of the connecting rods are positioned below the handle; the connecting rod above the handle and the connecting rod below the handle are distributed in a central symmetry manner with respect to the first opening.

8. The lockout device of claim 7, wherein:

the connecting rod comprises a rod body, a movable rod head and a rod head nut;

the rod body is in threaded connection with the movable rod head; the rod head nut is arranged on the rod body and connected with the movable rod head;

one end of the rod body is in threaded connection with the movable rod head, and the other end of the rod body is provided with a fixed rod head;

the movable rod head or the fixed rod head is hinged with the second opening.

9. A latch defined by any one of claims 1 to 8 wherein:

the lock head assembly is hinged with the transmission mechanism.

10. A latch defined by any one of claims 1 to 8 further comprising:

the transmission mechanism is connected with the lock head assembly through the plectrum assembly;

the shifting piece assembly comprises a fixed shaft, a lock head shifting piece, a shifting piece retainer ring, a fastening nut and a nut split pin;

the fixed shaft is arranged on the door leaf and used for providing an installation position; the lock head shifting piece is rotatably connected with the fixed shaft, one end of the lock head shifting piece is hinged with the transmission mechanism, and the other end of the lock head shifting piece is sleeved on the lock head assembly; the shifting piece retainer ring is arranged on the fixed shaft and connected with the lock head shifting piece, and the fastening nut is arranged on the fixed shaft and connected with the shifting piece retainer ring; the nut cotter pin is mounted on the fastening nut;

the lock head shifting piece is also provided with a limiting device which is used for abutting against the lock head assembly when in action, the limiting device comprises a limiting bolt and a limiting nut, the limiting bolt is in threaded connection with the lock head shifting piece, and the limiting nut is in threaded connection with the limiting bolt;

a shifting sheet copper sleeve is arranged at the rotatable connection part of the locking head shifting sheet and the fixed shaft;

and the two sides of the lock head shifting piece are provided with shifting piece adjusting gaskets which are arranged on the fixed shaft.

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