CN111827786A

CN111827786A - Lock head

Info

Publication number: CN111827786A
Application number: CN202010726282.9A
Authority: CN
Inventors: 斯燕方; 殷玲
Original assignee: Individual
Current assignee: Sun Bin
Priority date: 2020-07-25
Filing date: 2020-07-25
Publication date: 2020-10-27
Anticipated expiration: 2040-07-25
Also published as: CN111827786B

Abstract

The invention discloses a lock head, which comprises a lock head body, two groups of lock cylinders, a plurality of groups of balls, a plurality of groups of springs, an outer fixing plate, a door outer plate, an inner fixing plate, two groups of clamping springs and two groups of clamping blocks, wherein the outer fixing plate and the door outer plate are both provided with lock head jacks, the outer fixing plate is riveted with the outer side of the door outer plate, the front part of the lock head body penetrates through the inner fixing plate, and the left end and the right end of the front part of the lock head body; the lubricating unit is arranged, so that the horizontally arranged lock head can be lubricated, the lubricating unit is particularly suitable for lubricating and maintaining the vertically arranged lock head, for example, when the lock is installed on a ceiling or the ground, the lock cylinder is in the vertical direction, when the interior of the lock cylinder needs to be lubricated, the mode of filling the lubricant into the interior of the lock cylinder in the prior art is very inconvenient, and the problem that the lock head is difficult to lubricate and maintain when the lock head is vertically arranged is solved through the design.

Description

Lock head

Technical Field

The invention relates to the technical field of locks, in particular to a lock.

Background

The anti-theft door generally adopts a mortise door lock head, a key general part of the mortise door lock is a lock head, the anti-theft door has great defects for the good installation and installation universality of the lock, a panel of the anti-theft door is provided with an installation hole, the mortise door lock head is installed in the installation hole, a lock core panel is installed on the panel of the anti-theft door to cover the mortise door lock head, the size of the installation hole is usually larger than that of the mortise door lock head, when the lock core panel is damaged, the mortise door lock head is easy to be broken by prying, so that the door lock is damaged, and other people can forcibly rotate the lock head through some tools to forcibly unlock the lock, so that the anti-theft performance of the;

simultaneously, the inside lock core of tapered end is after using a period, must in time lubricate, otherwise unblank will become difficult, the mode of adopting among the prior art is when discovering the lock core needs to lubricate, go into emollient in to the lock core, this at first wastes time and energy, can't just can lubricate the maintenance to the lock core when unblanking at every turn, and simultaneously, to the tapered end of vertical placing, when the inside needs of lock core is lubricated, adopt among the prior art, the mode of pouring into emollient is very inconvenient to the lock core inside, and emollient pours into, because the tapered end is vertical to be placed, emollient receives gravity to drop, can't realize the lubrication of lock core at all.

Therefore, the invention provides a lock head.

Disclosure of Invention

The invention aims to provide a lock head to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a lock head comprises a lock head body, two groups of lock cylinders, a lubricating unit, a plurality of groups of balls and a plurality of groups of unlocking springs, wherein the front part and the rear part of the lock head body are respectively provided with a rotating cavity, the side walls of the two groups of lock cylinders are respectively in sliding connection with the side walls of the two groups of rotating cavities, the middle area of the lock head body is provided with a control cavity, and the control cavity is communicated with the two groups of rotating cavities; the lubricating unit is used for daily lubrication inside the lock head body;

the door lock further comprises an outer fixing plate, a door outer plate, an inner fixing plate, two groups of clamping springs and two groups of clamping blocks, wherein the outer fixing plate and the door outer plate are respectively provided with a lock head jack, the outer fixing plate is riveted with the outer side of the door outer plate, the front part of the lock head body penetrates through the inner fixing plate, the left end and the right end of the front part of the lock head body are respectively provided with a clamping hole, one end of each group of clamping springs is respectively connected with the inner sides of the two groups of clamping holes, the other end of each group of clamping springs is respectively connected with the two groups of clamping blocks, the left wall and the right wall of the lock head jack of the outer fixing plate are respectively provided with a fixing hole, the outer sides of the two groups of clamping blocks respectively extend out of the two groups of clamping holes and are respectively inserted into the two groups of fixing holes, the two groups of lock cylinders are, the lock cylinder is characterized in that two sets of rotating rings are arranged in the lock cylinder cavity, rotating grooves are formed in the side wall of the first lock cylinder and the side wall of the second lock cylinder, the two sets of rotating rings are connected with the two sets of rotating grooves in a sliding mode, unlocking grooves are formed in the outer side of the second lock cylinder and the outer side of the first lock cylinder, multiple sets of unlocking holes are formed in the unlocking grooves of the second lock cylinder, multiple sets of marbles and multiple sets of unlocking springs are located in the multiple sets of unlocking holes respectively, telescopic grooves opposite to the unlocking grooves are formed in the side wall of the lock cylinder cavity, multiple sets of telescopic springs and clamping strips are arranged in the telescopic cavities, one ends of the multiple sets of telescopic springs are connected with the side wall of the telescopic cavity, and the other ends of the multiple sets.

Preferably, the two groups of the clamping blocks are in a right-angle trapezoidal structure, and the inclined surfaces of the two groups of the clamping blocks face forwards.

Preferably, the lubricating unit is installed on one side of the second lock cylinder, a key penetrates through the lubricating unit and then enters the lock hole of the second lock cylinder, the lubricating unit comprises a hollow rubber part, the hollow rubber part is made of polyurethane rubber, superfine graphite powder is filled in the hollow rubber part, a through hole is formed in the inner ring of the hollow rubber part, the inner diameter of the hollow rubber part is larger than the diameter of the lock hole of the second lock cylinder, the hollow rubber ring is compressed when the key enters the second lock cylinder from the lock hole, and the superfine graphite powder flows out from the through hole.

Preferably, pull rings are uniformly arranged on the inner wall of the outer ring and the outer wall of the inner ring of the hollow rubber part, an elastic rope is arranged between the inner wall of the outer ring and the inner wall of the outer ring of the hollow rubber part, one end of the elastic rope is fixedly connected with the pull ring on the inner part of the hollow rubber part, the other end of the elastic rope sequentially penetrates through the inner wall of the outer ring and the pull ring on the outer wall of the inner ring of the hollow rubber part and then penetrates out of the inner ring of the hollow rubber part and is connected with a graphite block, and the elastic rope sequentially penetrates through the inner wall of the outer ring and the pull ring on the outer wall of the inner ring of the; the size of the graphite block is smaller than that of the second lock cylinder lock catch, and when a key enters the lock cylinder body through the lubricating unit and the lock hole of the second lock cylinder, the key pushes the graphite block to enter the lock cylinder body to lubricate the graphite block; one side of the lock head body, which is far away from the lubricating unit, is provided with a placing opening for placing a graphite block entering the interior of the lock head body.

Preferably, the surface of the elastic rope is subjected to rough treatment and used for adhering superfine graphite powder in the hollow rubber part, so that the lubricating effect in the lock head body is improved.

Preferably, the two sets of side walls of the rotating cavity are provided with two sets of limiting grooves, the outer wall of the lock cylinder body is provided with two sets of limiting rings, and the four sets of limiting rings are respectively connected with the four sets of limiting grooves in a sliding mode.

Preferably, the door frame further comprises a plurality of sets of fixing screws, and the inner fixing plate and the outer door plate are screwed by the plurality of sets of fixing screws.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the lock disclosed by the invention, the lubricating unit is arranged, so that when the lock is not unlocked for a long time, the inside of the lock body can be lubricated only by sliding the key back and forth between the hollow rubber ring and the lock body for a plurality of times, so that when the lock is not unlocked for a long time, a lubricant does not need to be added into the lock body independently, the lock can be still opened quickly when the lock is not used for a long time, secondly, the key can be lubricated once when entering the lock body once, the inside of the lock body can keep a good lubricating effect for a long time, and the service life of the lock body is prolonged.

2. According to the lock head, the lubricating unit is arranged, so that the horizontally arranged lock head can be lubricated, the lock head is particularly suitable for lubricating and maintaining the vertically arranged lock head, for example, when the lock is installed on a ceiling or the ground, the lock cylinder is in the vertical direction, when the interior of the lock cylinder needs to be lubricated, the mode that the lubricant is filled into the interior of the lock cylinder in the prior art is very inconvenient, and the problem that the lock head is not easy to lubricate when the lock head is vertically arranged is solved through the design.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;

FIG. 3 is a schematic view of the internal structure of the lock body according to the present invention;

fig. 4 is a partial enlarged view of the present invention at B in fig. 3.

Fig. 5 is a schematic structural view of a lubricating unit in the present invention.

In the figure: the lock comprises a lock body 1, a lubricating unit 2, a hollow rubber part 21, a through hole 22, a pull ring 23, an elastic rope 24, a graphite block 25, a placing port 26, a marble 3, an unlocking spring 4, an outer fixing plate 5, an outer door plate 6, an inner fixing plate 7, a clamping spring 8, a clamping block 9, a first lock core 10, a second lock core 11, a lock core body 12, a rotary ring 13, an expansion spring 14, a clamping strip 15, a limiting ring 16 and a fixing screw 17.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 5 (fig. 1 does not show the lubrication unit 2 to represent the position of the second lock cylinder 11), the present invention provides a technical solution: a lock head comprises a lock head body 1, two groups of lock cylinders, a lubricating unit 2, a plurality of groups of balls 3 and a plurality of groups of unlocking springs 4, wherein the front part and the rear part of the lock head body 1 are respectively provided with a rotating cavity, the side walls of the two groups of lock cylinders are respectively in sliding connection with the side walls of the two groups of rotating cavities, the middle area of the lock head body 1 is provided with a control cavity, and the control cavity is communicated with the two groups of rotating cavities; the lubricating unit 2 is used for daily lubrication inside the lock head body 1;

the lock is characterized by further comprising an outer fixing plate 5, an outer door plate 6, an inner fixing plate 7, two sets of clamping springs 8 and two sets of clamping blocks 9, wherein the outer fixing plate 5 and the outer door plate 6 are provided with lock jacks, the outer fixing plate 5 is riveted with the outer side of the outer door plate 6, the front portion of the lock body 1 penetrates through the inner fixing plate 7, the left end and the right end of the front portion of the lock body 1 are provided with clamping holes, one ends of the two sets of clamping springs 8 are respectively connected with the inner sides of the two sets of clamping holes, the other ends of the two sets of clamping springs 8 are respectively connected with the two sets of clamping blocks 9, the left wall and the right wall of the lock jack of the outer fixing plate 5 are provided with fixing holes, the outer sides of the two sets of clamping blocks 9 respectively extend out of the two sets of clamping holes and are respectively inserted into the two sets of fixing holes, the lock comprises a second lock cylinder 11 and a lock cylinder body 12, wherein a lock cylinder cavity is arranged in the lock cylinder body 12, two sets of rotating rings 13 are arranged in the lock cylinder cavity, rotating grooves are formed in the side wall of the first lock cylinder 10 and the side wall of the second lock cylinder 11, the two sets of converting are respectively in sliding connection with the two sets of rotating grooves, unlocking grooves are formed in the outer side of the second lock cylinder 11 and the outer side of the first lock cylinder 10, multiple groups of unlocking holes are formed in the unlocking grooves of the second lock cylinder 11, multiple groups of marbles 3 and multiple groups of unlocking springs 4 are respectively located in the multiple groups of unlocking holes, a telescopic groove opposite to the unlocking grooves is formed in the side wall of the lock cylinder cavity, multiple groups of telescopic springs 14 and clamping strips 15 are arranged in the telescopic cavity, one ends of the multiple groups of telescopic springs 14 are connected with the side wall of the telescopic cavity, and the other ends of the multiple;

when the lock is used, the outer fixing plate 5 is riveted with the door outer plate 6, the clamping spring 8 enables the clamping block 9 to extend into the fixing hole, the inner fixing plate 5 is matched with the fixing hole through the clamping block 9 and is connected with the lock body 1, the inner fixing plate 7 is connected with the front part of the lock body 1 and is tightly attached to the door outer plate 6, the lock can be fixedly installed with the door plate, the lock core panel is prevented from being damaged, when other people use a tool of an unpaired key to forcibly rotate the lock core, because the tool cannot be perfectly matched with the lock core, a plurality of groups of pins 3 cannot be completely contracted back to open the lock hole, the clamping strip 15 cannot be inserted into the lock opening groove, when the tool is rotated by other people, the second lock core 11 can only be driven to rotate, the first lock core 10 cannot be driven to rotate, the lock cannot be opened, when the matched key is inserted into the key hole, the clamping strip 15 extends into the unlocking groove under the action of the telescopic spring 14, a user rotates a key, the key drives the second lock cylinder 11 to rotate, the second lock cylinder 11 drives the first lock cylinder 10 to rotate through the clamping strip 15, so that the lock is unlocked, the lock head and the door plate can be fixedly installed, the lock cylinder panel is prevented from being damaged, other people can be prevented from forcibly rotating the lock head through a tool, the lock is forcibly unlocked, and the safety of the lock head is enhanced;

before a key enters a lock hole of the second lock cylinder 11, firstly, the lubricating unit 2 can lubricate the inside of the lock cylinder body 1 through the lubricating unit 2, so that the first lock cylinder 10 and the second lock cylinder 11 can be conveniently opened, the opening time of the first lock cylinder 10 and the second lock cylinder 11 is shortened, and meanwhile, the service life of the lock cylinder body 1 is prolonged.

As a specific embodiment of the present invention, the two groups of fixture blocks 9 are both in a right trapezoid structure, and the inclined surfaces of the two groups of fixture blocks 9 are forward; the inclined plane of the fixture block 9 is forward, so that the lock head body 1 and the outer fixing plate 5 can be conveniently installed, the fixture block 9 is of a right trapezoid structure, the rear end of the fixture block 9 is a trapezoid long bottom end, the fixture block 9 can be prevented from being separated from the fixing hole, and the stability of the lock head is enhanced.

As a specific embodiment of the present invention, the lubricating unit 2 is installed at one side of the second lock cylinder 11, a key passes through the lubricating unit 2 and enters into a lock hole of the second lock cylinder 11, the lubricating unit 2 includes a hollow rubber member 21, the hollow rubber member 21 is made of polyurethane rubber, the hollow rubber member 21 is filled with ultrafine graphite powder, an inner ring of the hollow rubber member 21 is provided with a through hole 22, an inner diameter of the hollow rubber member 21 is larger than a diameter of the lock hole of the second lock cylinder 11, so as to ensure that when the key enters into the second lock cylinder 11 from the lock hole, a center rubber ring is compressed, and the ultrafine graphite powder flows out from the through hole 22;

when the key enters the hollow rubber part 21, because the inner diameter of the hollow rubber part 21 is larger than the diameter of the lock hole of the second lock cylinder 11, when the key enters the lock hole of the second lock cylinder 11, the inner ring of the hollow rubber part 21 is extruded, when the inner ring of the hollow rubber part 21 is extruded, the superfine graphite powder in the hollow rubber part 21 is extruded to the surface of the key through the through hole 22, and when the key enters the lock body 1, the superfine graphite powder can be brought into the interior of the lock body 1 to lubricate the interior of the lock body 1, so that once lubrication maintenance can be carried out on the key when the key enters the interior of the lock body 1, firstly, when the key is not unlocked for a long time, the key only needs to slide back and forth between the hollow rubber part 21 and the lock body 1 for a plurality of times to realize the lubrication in the interior of the lock body 1, so that when the key is not unlocked for a long time, the lubricant does not need to be, the lock can be opened quickly when the lock is not used for a long time, and then once lubrication maintenance can be performed on the key once the key enters the lock body 1, so that the inside of the lock body 1 can keep a good lubrication effect for a long time, and the service life of the lock body 1 is prolonged;

as for the through hole 21, in the actual production, first, a hole is formed in the hollow rubber member 21, and then a hollow cylinder made of hard plastic is put into the formed hole to form the through hole 21, so that when the hollow rubber member 21 is deformed by compression, the through hole 21 is prevented from being compressed and reduced, so that the ultra-fine graphite powder can not be discharged normally, and as for the diameter of the through hole 21, during manufacturing, the lubricating unit 2 can be detachably mounted on one side of the second lock cylinder 11, so that when the superfine graphite powder in the hollow rubber part 21 is insufficient, the lubricating unit is detached to supplement the superfine graphite powder, therefore, the hollow rubber member 21 is further provided with an ultrafine graphite powder supplementing port, and the shape of the hollow rubber member 21 is not limited to the shape shown in fig. 5, and can be reasonably set according to the actual shape of the lock hole of the second lock cylinder 11.

As a specific embodiment of the present invention, pull rings 23 are uniformly arranged on the inner wall of the outer ring and the outer wall of the inner ring of the hollow rubber member 21, an elastic cord 24 is arranged between the inner wall of the outer ring and the inner wall of the outer ring of the hollow rubber member 21, one end of the elastic cord 24 is fixedly connected to the pull ring 23 on the inner part of the hollow rubber member 21, the other end of the elastic cord passes through the pull rings 23 on the inner wall of the outer ring and the outer wall of the inner ring of the hollow rubber member 21 in sequence, and then passes through the inner ring of the hollow rubber member 21 after passing through the pull rings 23 on the inner wall and the outer wall of the outer ring of the hollow rubber member 21 in sequence, and then passes through the inner ring of the hollow rubber member 21; the size of the graphite block 25 is smaller than that of the lock catch of the second lock cylinder 11, and when a key enters the lock body 1 through the lubricating unit 2 and the lock hole of the second lock cylinder 11, the key pushes the graphite block 25 to enter the lock body 1 to lubricate the graphite block; a placing port 26 is formed in one side, away from the lubricating unit 2, of the lock head body 1 and used for placing a graphite block 25 entering the interior of the lock head body 1;

when the key passes through the inner ring of the hollow rubber part 21, the graphite block 25 is brought into the lock body 1 from the lock hole of the second lock cylinder 11, so as to further lubricate the inside of the lock body 1, and further prolong the service life of the lock body 1, when the key completely enters the lock body 1, the graphite block 25 enters the placing opening 26, and when the graphite block 25 enters the inside of the lock body 1, the elastic rope 24 is stretched, so that the inner ring and the outer ring of the hollow rubber part 21 are compressed, because the hollow rubber part 21 is made of polyurethane rubber, the hollow rubber part 21 has good restoring force, when the key is pulled out from the lock body 1, under the restoring force of the hollow rubber part 21, the graphite block 25 returns to reset along with the elastic rope 24 after being retracted, so that when the next key enters, the graphite block 25 can lubricate the inside of the lock body 1 along with the key, and the graphite block 25 can also block the through hole 21 when being reset, the design of the invention can lubricate the horizontally arranged lock head, and is particularly suitable for lubricating and maintaining the vertically arranged lock head, for example, when the lock head is arranged on a ceiling or the ground, the lock cylinder is in the vertical direction, when the interior of the lock cylinder needs to be lubricated, the mode of filling lubricant into the interior of the lock cylinder in the prior art is very inconvenient, but the invention solves the problem that the lock head is difficult to lubricate when vertically arranged through the design;

for the elastic rope 24 in the invention, when the lock head is actually produced and manufactured, the thickness and the material of the elastic rope 24 can be actually selected according to the size of the second lock cylinder 11 in the lock head, the actually selected standard is that after the elastic rope 24 enters the interior of the lock head body 1, the key is not influenced to be matched with the lock head body 1 for use, for the connection mode of the elastic rope 24 and the graphite block 25, the elastic rope 24 can be selected to be manually bound after penetrating through the graphite block 25, so that the graphite block 25 can be conveniently and timely replaced after consuming a certain amount of amount or when being affected with damp, for the graphite block 25, not only the shape shown in the attached figure 5 is limited, but also other different shapes can be adopted, as long as the shape of the graphite block 25 ensures that when the key enters the interior of the lock head body 1, the graphite block 25 can normally enter the interior of the lock head body 1, and the initial position of the graphite block 25 can be placed, and the graphite block 25 can enter normally as long as the key enters the lock body 1.

As a specific embodiment of the present invention, the surface of the elastic cord 24 is roughened to adhere the ultrafine graphite powder inside the hollow rubber member 21, so as to improve the lubricating effect inside the lock body 1; after the surface of the elastic rope 24 is roughened, a part of superfine graphite powder can be attached, and when the superfine graphite powder enters the inside of the locking head body 1, the auxiliary graphite block 25 lubricates the inside of the locking head body 1, so that the effect of lubricating and maintaining the inside of the locking head body 1 is improved.

As a specific embodiment of the present invention, two sets of limiting grooves are respectively formed on the side walls of two sets of the rotating cavities, two sets of the limiting rings 16 are respectively formed on the outer walls of two sets of the lock cylinder bodies 12, and four sets of the limiting rings 16 are respectively connected with four sets of the limiting grooves in a sliding manner;

by adopting the technical scheme, the lock core can be prevented from falling off from the lock body 1, and the reliability of the lock head is enhanced.

As a specific embodiment of the present invention, the present invention further comprises a plurality of sets of fixing screws 17, wherein the inner fixing plate 7 and the outer door panel are screwed by the plurality of sets of fixing screws 17; through adopting above-mentioned technical scheme, set screw 17 has strengthened the stability and the security of tapered end with inner fixed plate 7 and outer door plant fixed connection.

before a key enters a lock hole of the second lock cylinder 11, firstly, the lubricating unit 2 can lubricate the inside of the lock cylinder body 1 through the lubricating unit 2, so that the first lock cylinder 10 and the second lock cylinder 11 can be conveniently opened, the opening time of the first lock cylinder 10 and the second lock cylinder 11 is reduced, meanwhile, the service life of the lock cylinder body 1 is prolonged, when the key enters the hollow rubber part 21, because the inner diameter of the hollow rubber part 21 is larger than the diameter of the lock hole of the second lock cylinder 11, when the key enters the lock hole of the second lock cylinder 11, the inner ring of the hollow rubber part 21 is extruded, when the inner ring of the hollow rubber part 21 is extruded, the superfine graphite powder inside the hollow rubber part 21 is extruded to the surface of the key through the through hole 22, and when the key enters the lock cylinder body 1, the superfine graphite powder can be brought into the lock cylinder body 1 to lubricate the inside of the lock cylinder 1, so that when the key enters the lock cylinder body 1, the key can be lubricated and maintained for one time, firstly, when the lock is not unlocked for a long time, the key only needs to slide back and forth between the hollow rubber part 21 and the lock body 1 for several times, so that the lubrication inside the lock body 1 can be realized, and when the lock is not unlocked for a long time, the lubricant does not need to be added into the lock body 1 independently, so that the lock can be opened quickly when the lock is not used for a long time;

when the key passes through the inner ring of the hollow rubber part 21, the graphite block 25 is brought into the lock body 1 from the lock hole of the second lock cylinder 11, so as to further lubricate the inside of the lock body 1, and further prolong the service life of the lock body 1, when the key completely enters the lock body 1, the graphite block 25 enters the placing opening 26, and when the graphite block 25 enters the inside of the lock body 1, the elastic rope 24 is stretched, so that the inner ring and the outer ring of the hollow rubber part 21 are compressed, because the hollow rubber part 21 is made of polyurethane rubber, the hollow rubber part 21 has good restoring force, when the key is pulled out from the lock body 1, under the restoring force of the hollow rubber part 21, the graphite block 25 returns to reset along with the elastic rope 24 after being retracted, so that when the next key enters, the graphite block 25 can lubricate the inside of the lock body 1 along with the key, and the graphite block 25 can also block the through hole 21 when being reset, the design of the invention can lubricate the horizontally arranged lock head, and is particularly suitable for lubricating and maintaining the vertically arranged lock head, for example, when the lock head is arranged on a ceiling or the ground, the lock core is in the vertical direction, when the interior of the lock core needs to be lubricated, the mode of filling lubricant into the interior of the lock core in the prior art is very inconvenient, and the invention solves the problem that the lock head is difficult to lubricate when being vertically arranged through the design.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A lock head is characterized in that: the lock comprises a lock body (1), two groups of lock cylinders, a lubricating unit (2), a plurality of groups of balls (3) and a plurality of groups of unlocking springs (4), wherein the front part and the rear part of the lock body (1) are respectively provided with a rotating cavity, the side walls of the two groups of lock cylinders are respectively in sliding connection with the side walls of the two groups of rotating cavities, the middle area of the lock body (1) is provided with a control cavity, and the control cavity is communicated with the two groups of rotating cavities; the lubricating unit (2) is used for daily lubrication inside the lock body (1);

the door lock further comprises an outer fixing plate (5), an outer door plate (6), an inner fixing plate (7), two groups of clamping springs (8) and two groups of clamping blocks (9), wherein the outer fixing plate (5) and the outer door plate (6) are respectively provided with a lock head jack, the outer fixing plate (5) is riveted with the outer side of the outer door plate (6), the front part of the lock head body (1) penetrates through the inner fixing plate (7), the left end and the right end of the front part of the lock head body (1) are respectively provided with clamping holes, one ends of the two groups of clamping springs (8) are respectively connected with the inner sides of the two groups of clamping holes, the other ends of the two groups of clamping springs (8) are respectively connected with the two groups of clamping blocks (9), the left wall and the right wall of the lock head jack of the outer fixing plate (5) are respectively provided with fixing holes, the outer sides of the two groups of clamping blocks (9), the lock cylinder comprises a first lock cylinder (10), a second lock cylinder (11) and a lock cylinder body (12), wherein a lock cylinder cavity is arranged in the lock cylinder body (12), two sets of rotating rings (13) are arranged in the lock cylinder cavity, rotating grooves are formed in the side wall of the first lock cylinder (10) and the side wall of the second lock cylinder (11), the two sets of converting mechanisms are respectively in sliding connection with the two sets of rotating grooves, unlocking grooves are formed in the outer side of the second lock cylinder (11) and the outer side of the first lock cylinder (10), a plurality of sets of unlocking holes are formed in the unlocking grooves of the second lock cylinder (11), a plurality of sets of marbles (3) and a plurality of sets of unlocking springs (4) are respectively located in the plurality of unlocking holes, telescopic grooves opposite to the unlocking grooves are formed in the side wall of the lock cylinder cavity, and a plurality of sets of telescopic springs (14) and clamping strips (15) are arranged in the telescopic grooves, one end of the multiple groups of the telescopic springs (14) is connected with the side wall of the telescopic cavity, and the other end of the multiple groups of the telescopic springs (14) is connected with the clamping strip (15).

2. The lock cylinder according to claim 1, wherein: the two groups of the clamping blocks (9) are in right-angle trapezoidal structures, and the inclined planes of the two groups of the clamping blocks (9) are forward.

3. The lock cylinder according to claim 2, wherein: lubricating unit (2) are installed in one side of second lock core (11), and the key gets into in the lockhole of second lock core (11) after passing lubricating unit (2), lubricating unit (2) include hollow rubber spare (21), and hollow rubber spare (21) adopt polyurethane rubber to make, and hollow rubber spare (21) intussuseption is filled with superfine graphite powder, and the inner circle of hollow rubber spare (21) is equipped with through-hole (22), and the internal diameter of hollow rubber spare (21) is greater than the diameter of second lock core (11) lockhole for guarantee that the key gets into second lock core (11) space-time core rubber ring compression from the lockhole, superfine graphite powder flows out in from through-hole (22).

4. The lock cylinder according to claim 3, wherein: pull rings (23) are uniformly arranged on the inner wall of the outer ring and the outer wall of the inner ring of the hollow rubber part (21), an elastic rope (24) is arranged between the inner wall of the outer ring and the inner wall of the outer ring of the hollow rubber part (21), one end of the elastic rope (24) is fixedly connected with the pull ring (23) on the inner part of the hollow rubber part (21), the other end of the elastic rope (24) sequentially penetrates through the pull rings (23) on the inner wall of the outer ring and the outer wall of the inner ring of the hollow rubber part (21) and then penetrates out of the inner ring of the hollow rubber part (21) and is connected with a graphite block (25), and the elastic rope (24) sequentially penetrates through the pull rings (23) on the inner wall of the outer ring and the outer wall of the inner ring of the hollow rubber part (21); the size of the graphite block (25) is smaller than that of the lock catch of the second lock cylinder (11), and when a key enters the lock body (1) through the lubricating unit (2) and the lock hole of the second lock cylinder (11), the key pushes the graphite block (25) to enter the lock body (1) to lubricate the graphite block; one side of the lock body (1) far away from the lubricating unit (2) is provided with a placing port (26) for placing a graphite block (25) entering the interior of the lock body (1).

5. The lock cylinder according to claim 4, wherein: the surface of the elastic rope (24) is subjected to rough treatment and is used for adhering superfine graphite powder in the hollow rubber part (21) so as to improve the lubricating effect in the lock body (1).

6. The lock cylinder according to claim 5, wherein: the side wall of the two groups of rotating cavities is provided with two groups of limiting grooves, the outer wall of the lock cylinder body (12) is provided with two groups of limiting rings (16), and the four groups of limiting rings (16) are respectively connected with the four groups of limiting grooves in a sliding mode.

7. The lock cylinder according to claim 6, wherein: the inner fixing plate (7) and the outer door plate are screwed by the multiple groups of fixing screws (17), and the multiple groups of fixing screws (17).