CN113404392A

CN113404392A - Coded helmet lock and installation method

Info

Publication number: CN113404392A
Application number: CN202110583671.5A
Authority: CN
Inventors: 张帆
Original assignee: Hangzhou City University
Current assignee: Hangzhou City University
Priority date: 2021-05-27
Filing date: 2021-05-27
Publication date: 2021-09-17
Anticipated expiration: 2041-05-27
Also published as: CN113404392B

Abstract

The invention relates to a coded helmet lock which comprises a lock catch, a locking machine, a release button, a half-moon card, a small coded gear, a large coded gear, a lock shaft, a lock cover, a large coded wheel, a small coded wheel, a lock shaft cover, a coded wheel cover, a handlebar buckle and a handlebar buckle bolt, wherein the lock catch is arranged on the lock machine; the locking machine bolt sequentially penetrates through the locking retainer, the first locking washer, the lock, the second locking washer and the connecting hole of the locking machine and is fixed; the key seat is connected with the release key through a key shaft, a key spring is arranged between the key seat and the release key, the key seat and one side of the release key are matched and connected with a latch, and the latch, the release key, the key shaft, the key seat and the key spring form a release key assembly and are arranged in a key groove of the lock machine; the half-moon card shaft is matched and connected with the shaft hole of the half-moon card, and the half-moon card is connected with the half-moon card spring. The invention has the beneficial effects that: the helmet locking device can provide a convenient and reliable helmet locking device for an electric bicycle user, and solves the problem that a helmet is likely to be stolen when the user goes out.

Description

Coded helmet lock and installation method

Technical Field

The invention relates to a lock structure, in particular to a coded helmet lock and an installation method.

Background

The existing electric bicycles have a large quantity, and the helmet is required to be worn when the electric bicycles are ridden according to safety regulations, but many electric bicycles are not provided with special helmet locks, so that the helmet theft event happens occasionally. The lock that the electric bicycle rider equipped by oneself because not specially designed for the helmet, there are a lot of inconveniences in the use.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a coded helmet lock which is reasonable in structure, convenient to install and use and reliable and is suitable for an electric bicycle and an installation method.

The coded helmet lock comprises a lock catch, a locking machine, a release button, a half-moon card, a small coded gear, a large coded gear, a lock shaft, a lock cover, a large coded wheel, a small coded wheel, a lock shaft cover, a coded wheel cover, a handlebar buckle and a handlebar buckle bolt; the locking machine bolt sequentially penetrates through the locking retainer, the first locking washer, the lock, the second locking washer and the connecting hole of the locking machine and is fixed; the key seat is connected with the release key through a key shaft, a key spring is arranged between the key seat and the release key, the key seat and one side of the release key are matched and connected with a latch, and the latch, the release key, the key shaft, the key seat and the key spring form a release key assembly and are arranged in a key groove of the lock machine; the half-moon card shaft is matched and connected with the shaft hole of the half-moon card, the half-moon card is connected with the half-moon card spring, and the half-moon card shaft, the half-moon card spring and the half-moon card are arranged in the lock machine; the outer part of the small coded gear is connected with the large coded gear in a matching way, the small coded gear and the large coded gear pass through the lock cover and are arranged in a gear hole of the lock machine, the lock shaft is sleeved outside the lock shaft through a spring, the lock shaft passes through the lock cover and is arranged in a lock shaft hole of the lock machine, and the lock cover is connected with the lock machine; the code gear shaft is connected with the inside of the small code gear in a matching way; the big password wheel is sleeved on the big password gear, the small password wheel is sleeved on the small password gear, the end surface of a gap of the small password gear and the end surface of a gap of the big password gear are matched with the end surface of a gap of the half-moon card, a password wheel bolt penetrates through a password wheel cover on the outer side of the small password wheel and is screwed up through a thread of the small password gear, and the lock shaft cover is arranged on a thread of the lock shaft; the lower part of the locking machine is connected with the left handlebar buckle and the right handlebar buckle and is fixed on a handle steel pipe of the electric bicycle.

Preferably, the method comprises the following steps: the two side bulges of the key base are matched with the key groove of the lock machine.

Preferably, the method comprises the following steps: the thickness of the first lock catch washer and the second lock catch washer is 3mm-4 mm.

Preferably, the method comprises the following steps: the outer diameter of the large code wheel is 4-6mm larger than that of the small code wheel.

Preferably, the method comprises the following steps: the code gear elastic sheet comprises a first code gear elastic sheet, a second code gear elastic sheet and a third code gear elastic sheet, and is arranged on the outer sides of the small code gear and the large code gear in the lock machine.

Preferably, the method comprises the following steps: the first password gear elastic sheet and the second password gear elastic sheet form an included angle of 135 degrees, the third password gear elastic sheet and the second password gear elastic sheet form an included angle of 112.5 degrees, and the first password gear elastic sheet and the third password gear elastic sheet form an included angle of 112.5 degrees by taking the axis of the password gear shaft as the center of a circle.

Preferably, the method comprises the following steps: the locking cover is fixedly connected with the locking machine through a locking cover screw.

Preferably, the method comprises the following steps: the lower part of the locking machine is connected with the left handlebar buckle and the right handlebar buckle in a matching way through the handlebar buckle long bolt, the handlebar buckle short bolt and the handlebar buckle nut and is fixed on a handle steel pipe of the electric bicycle.

Preferably, the method comprises the following steps: the screw heads of the locking machine bolt and the password wheel bolt are matched with an inner hexagon on the installation wrench.

The installation method of the coded helmet lock comprises the following steps:

s1, sequentially connecting the lock retainer, the first lock washer, the lock and the second lock washer with the lock through the lock bolt, and screwing the lock bolt by using an installation wrench;

s2, assembling the latch, the release button, the button shaft, the button seat and the button spring into a release button assembly, and then assembling the release button assembly into a button groove of the lock machine, wherein the bulges at the two sides of the button seat are tightly matched with the button groove of the lock machine; assembling the half-moon card shaft, the half-moon card spring and the half-moon card, and putting the half-moon card spring and the half-moon card into a locking machine after the assembly is finished; the coded gear shaft is matched and connected with the inside of the small coded gear, the outside of the small coded gear is matched and connected with the large coded gear, the small coded gear and the large coded gear pass through the lock cover and are installed in a gear hole of the lock machine, the lock shaft spring is sleeved on the outer side of the lock shaft, the lock shaft passes through the lock cover and is installed in a lock shaft hole of the lock machine, and the lock cover is connected and fixed with the lock machine through a lock cover screw;

s3, sleeving a large password wheel on a large password gear, sleeving a small password wheel on the small password gear, enabling the gap end face of the small password gear and the gap end face of the large password gear to be matched with the gap end face of a half-moon card, enabling password digital positions on the large password wheel and the small password wheel to be aligned with an arrow on a locking machine, enabling the group of numbers to be unlocking passwords of the password helmet lock, screwing a password wheel bolt through a password wheel cover through threads of the small password gear by using an installation wrench, and screwing a lock shaft cover on threads of a lock shaft;

s4, the assembled coded helmet lock main body, the left handlebar buckle and the right handlebar buckle are fixed on a handle steel pipe of the electric bicycle through the handlebar buckle long bolt, the handlebar buckle short bolt and the handlebar buckle nut, and the installation is assisted by using an installation wrench.

The invention has the beneficial effects that: the helmet locking device can provide a convenient and reliable helmet locking device for an electric bicycle user, and solves the problem that a helmet is likely to be stolen when the user goes out. The lock catch not only can lock the helmet buckle belt, but also can lock the raincoat neckline buckle belt and the environment-friendly bag carrying belt, and can provide a comprehensive article security means for electric bicycle users.

Drawings

FIG. 1 is an overall external view of the present invention;

FIG. 2 is an exploded view of the components of the present invention;

FIG. 3 is a schematic installation diagram of the installation step S1 in the second embodiment of the present invention;

fig. 4 is a schematic diagram of the second embodiment of the present invention after the installation step S1 is completed;

FIG. 5 is a sectional view taken along line A-A of FIG. 4;

FIG. 6 is a schematic installation diagram of the installation step S2 in the second embodiment of the present invention;

FIG. 7 is a schematic view of a key slot of the present invention;

fig. 8 is a schematic diagram of the second embodiment of the present invention after the installation step S2 is completed;

FIG. 9 is a cross-sectional view B-B of FIG. 8;

fig. 10 is an installation diagram of the installation step S3 in the second embodiment of the present invention;

fig. 11 is a schematic diagram of the second embodiment of the present invention after the installation in the installation step S3 is completed;

FIG. 12 is a cross-sectional view C-C of FIG. 11;

fig. 13 is an installation diagram of the installation step S4 in the second embodiment of the present invention;

FIG. 14 is a top view of the coded helmet lock of the present invention in use;

FIG. 15 is a perspective view of the combination helmet lock of the present invention in use;

fig. 16 is a schematic view of an unlocked state of the coded helmet lock according to the third embodiment of the present invention;

figure 17 is a cross-sectional view of a third embodiment of the present invention taken at 45 deg. from the perspective of the unlocked combination helmet lock (cross-sectional view of figure 16, D-D);

FIG. 18 is a schematic view of a third embodiment of the present invention showing a locking state of the combination helmet lock;

FIG. 19 is a schematic view of the internal components of a third embodiment of the present invention showing the locked state of the combination helmet lock;

fig. 20 is a schematic diagram of an anti-cracking state of a password helmet in the fourth embodiment of the present invention;

FIG. 21 is a schematic view of the inner components of a password helmet in a cracking-proof state according to a fourth embodiment of the present invention;

FIG. 22 is a perspective view of the handlebar fastening long bolt and the handlebar fastening nut being installed using the installation wrench;

FIG. 23 is a side view of the handlebar fastening long bolt and the handlebar fastening nut being installed using the installation wrench;

FIG. 24 is a cross-sectional view E-E of FIG. 23;

FIG. 25 is a perspective view of the handlebar fastening studs and nuts being installed using an installation wrench;

FIG. 26 is a side view of the handlebar fastening studs and nuts being installed using an installation wrench;

FIG. 27 is a sectional view F-F of FIG. 26;

FIG. 28 is a schematic view of the installation wrench, lockmachine bolt and combination wheel bolt;

fig. 29 is a sectional view G-G in fig. 28.

Description of reference numerals: the coded helmet lock 1, a locking machine bolt 2, a locking retainer 3, a locking shaft 3a, a first locking washer 4, a second locking washer 5, a locking machine 6, a locking machine 7, a key pressing groove 7a, an arrow 7b, a coded gear shaft 8, a first coded gear spring sheet 9, a second coded gear spring sheet 10, a third coded gear spring sheet 11, a locking shaft spring 12, a latch 13, an end face 13a of the latch, a release button 14, a button position 14a of the release button, a button shaft 15, a button seat 16, two-side bulges 16a, a button spring 17, a half-moon card shaft 18, a half-moon card spring 19, a half-moon card 20, a notch end face 20a of the half-moon card, an arc concave face 20c of the half-moon card, a small coded gear 21, a notch end face 21a of the small coded gear, a large coded gear 22, a notch end face 22a of the large coded gear, a locking shaft 23, a notch 23a of the locking shaft, an end face 23b of the locking shaft, and a protrusion end face 23c of the locking shaft, The lock cover 24, the large password wheel 25, the small password wheel 26, the lock shaft cover 27, the password wheel cover 28, the lock cover screw 29, the password wheel bolt 30, the left handle buckle 31, the right handle buckle 32, the handle buckle long bolt 33, the handle buckle short bolt 34, the handle buckle nut 35 and the installation wrench 36.

Detailed Description

The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Example one

The embodiment provides a coded helmet lock 1, which comprises a lock catch 6, a lock machine 7, a release button 14, a half-moon card 20, a small coded gear 21, a large coded gear 22, a lock shaft 23, a lock cover 24, a large coded wheel 25, a small coded wheel 26, a lock shaft cover 27, a coded wheel cover 28, a handlebar buckle and a handlebar buckle bolt. The locking machine bolt 2 sequentially penetrates through connecting holes of the locking retainer 3, the first locking washer 4, the locking buckle 6, the second locking washer 5 and the locking machine 7 and is fixed, and the locking machine bolt 2 is screwed down by using a special installation wrench 36. The key base 16 is connected with the release key 14 through a key shaft 15, a key spring 17 is arranged between the key base 16 and the release key 14, the latch 13 is connected with one side of the key base 16 and one side of the release key 14 in a matching manner, the latch 13, the release key 14, the key shaft 15, the key base 16 and the key spring 17 form a release key assembly and are installed in a key groove 7a of the lock machine 7, and bulges 16a on two sides of the key base 16 are tightly matched with the key groove 7a of the lock machine 7. Half moon card axle 18 is connected with half moon card 20's shaft hole cooperation, and half moon card 20 is connected half moon card spring 19, and half moon card axle 18, half moon card spring 19 and half moon card 20 are installed in lock machine 7. The outside of the small coded gear 21 is connected with the large coded gear 22 in a matching way, the small coded gear 21 and the large coded gear 22 pass through the lock cover 24 and are arranged in a gear hole of the lock machine 7, the lock shaft 23 passes through the lock cover 24 and is arranged in a lock shaft hole of the lock machine 7, the lock cover 24 is fixedly connected with the lock machine 7 through four lock cover screws 29, and the lock shaft spring 12 is sleeved on the outer side of the lock shaft 23. The code gear shaft 8 is connected with the inner part of the small code gear 21 in a matching way. The big code wheel 25 is sleeved on the big code gear 22, the small code wheel 26 is sleeved on the small code gear 21, the notch end face 21a of the small code gear and the notch end face 22a of the big code gear are matched with the notch end face 20a of the half-moon card, the code number positions on the big code wheel 25 and the small code wheel 26 are ensured to be aligned with an arrow 7b on the locking machine 7, the group of numbers are the unlocking codes of the code helmet lock 1, the code wheel bolt 30 penetrates through the code wheel cover 28 on the outer side of the small code wheel 26 and is screwed through the thread of the small code gear 21 by using the mounting wrench 36, and the lock shaft cover 27 is mounted on the thread of the lock shaft 23. The lower part of the locking machine 7 is connected with a left handlebar buckle 31 and a right handlebar buckle 32 in a matching way through a handlebar buckle long bolt 33, a handlebar buckle short bolt 34 and a handlebar buckle nut 35 and is fixed on a handlebar steel pipe of the electric bicycle, and in order to facilitate installation, an installation wrench 36 can be used for assisting installation.

As a preferred embodiment, the left handlebar fastener 31 and the right handlebar fastener 32, the mounting holes reserved for the handlebars can be selected with proper diameters according to the handlebar size, so as to be suitable for different vehicle types without affecting the whole structure of the helmet lock.

As a preferred embodiment, the thickness of the first lock washer 4 and the second lock washer 5 is about 3mm-4mm, and the gap formed by the thickness is suitable for locking two helmets.

As a preferred embodiment, the code wheels are two groups, namely a large code wheel 25 and a small code wheel 26, the number of each code wheel is preferably 4-8, the number of the code wheels and the number of the numbers are too large, so that the using steps are too complicated, and the code is easy to crack if the number of the code wheels and the number of the numbers are too small. The large cipher wheel 25 is 4-6mm larger than the small cipher wheel 26, which is convenient for not easy to drive one cipher wheel when rotating the other cipher wheel, and increases the convenience of use.

As a preferred embodiment, the cipher gear spring plates are three, that is, a first cipher gear spring plate 9, a second cipher gear spring plate 10 and a third cipher gear spring plate 11, which are installed outside the small cipher gear 21 and the large cipher gear 22 in the lock machine 7, and the axis of the cipher gear shaft 8 is taken as the center of circle, the first cipher gear spring plate 9 and the second cipher gear spring plate 10 form an included angle of 135 degrees, the third cipher gear spring plate 11 and the second cipher gear spring plate 10 form an included angle of 112.5 degrees, and the first cipher gear spring plate 9 and the third cipher gear spring plate 11 form an included angle of 112.5 degrees, so as to ensure that no matter which angle the small cipher gear 21 and the large cipher gear 22 are located, at least two cipher gear spring plates are tightly matched with the small cipher gear 21 and the large cipher gear 22, thereby preventing the two cipher gear spring plates from sliding.

As a preferred embodiment, the bolt 2 and the code wheel bolt 30 are designed by adopting a non-industry standard inner reverse hexagon head, and the heads can only be matched with an inner hexagon on the installation wrench 36, and cannot be opened by adopting an industry standard wrench, so that the anti-theft capability is improved.

Example two

The installation method of the coded helmet lock comprises the following steps:

and S1, sequentially connecting the locking retainer 3, the first locking washer 4, the lock 6, the second locking washer 5 and the locking machine 7 through the locking machine bolt 2, and screwing the locking machine bolt 2 by using the special installation wrench 36.

S2, assembling the latch 13, the release button 14, the button shaft 15, the button seat 16 and the button spring 17 into a release button assembly, and then placing the release button assembly into a button groove 7a of the locking machine 7, wherein the bulges 16a at the two sides of the button seat 16 are tightly matched with the button groove 7a of the locking machine 7; then assembling the half-moon card shaft 18, the half-moon card spring 19 and the half-moon card 20, and putting the half-moon card into the locking machine 7 after the assembly is finished; the coded gear shaft 8 is connected with the inside of the small coded gear 21 in a matching mode, the outside of the small coded gear 21 is connected with the large coded gear 22 in a matching mode, the small coded gear 21 and the large coded gear 22 penetrate through the lock cover 24 and are installed in a gear hole of the locking machine 7, the lock shaft spring 12 is sleeved on the outer side of the lock shaft 23, the lock shaft 23 penetrates through the lock cover 24 and is installed in a lock shaft hole of the locking machine 7, and the lock cover 24 is connected and fixed with the locking machine 7 through four lock cover screws 29.

S3, firstly sleeving the large password wheel 25 on the large password gear 22, then sleeving the small password wheel 26 on the small password gear 21, enabling the notch end face 21a of the small password gear and the notch end face 22a of the large password gear to be matched with the notch end face 20a of the half-moon card, ensuring that the password number positions on the large password wheel 25 and the small password wheel 26 are aligned with an arrow on the locking machine 7, enabling the group of numbers, namely the unlocking password of the password helmet lock 1, screwing the password wheel bolt 30 through the password wheel cover 28 through the thread of the small password gear 21 by using the installation wrench 36, and screwing the lock shaft cover 27 on the thread of the lock shaft 23.

S4, the assembled coded lock body, the left handle buckle 31 and the right handle buckle 32 are fixed on a handle steel pipe of the electric bicycle through the handle buckle long bolt 33, the handle buckle short bolt 34 and the handle buckle nut 35, and the installation can be assisted by the installation wrench 36 for facilitating installation. The helmet combination lock is in the unlocked state in the above step S3 and step S4.

EXAMPLE III

The locking step of the coded helmet lock comprises the following steps: the top view projection position of the lock catch 6 of the coded helmet lock 1 is positioned in the notch 23a of the lock shaft, the lock catch 6 can be opened by rotating the lock catch shaft 3a of the lock catch guard ring 3 upwards, the helmet buckle belt is plugged into the arc-shaped notch of the lock catch 6, the lock catch 6 is closed by rotating the lock catch shaft 3a of the lock catch guard ring 3 downwards, the lock shaft cover 27 and the lock shaft 23 are pushed inwards by pointing with hands, so that the end face 23b of the lock shaft is contacted with the end face 13a of the latch under the action of the elastic force of the lock shaft spring 12, at the moment, the key spring 17 is in a pressed state, the elastic force is applied to the latch 13 through the release key 14, and the lock shaft 23 is prevented from moving; then, clockwise rotation big password wheel big 25 or little password wheel little 26, or rotate both clockwise simultaneously, make the breach terminal surface 20a of half moon card misplace with the breach terminal surface 21a of little password gear or the breach terminal surface 22a of big password gear, force half moon card 20 to rotate 16 degrees through half moon card axle 18 anticlockwise, block the space that lock shaft 23 pops out outwards, half moon card spring 19 is in the compression state. At this time, the notch 23a of the lock shaft extends into the lock retainer 3, the lock catch 6 cannot rotate through the lock catch shaft 3a of the lock retainer 3, and the coded helmet lock 1 is in a locked state.

The unlocking step of the coded helmet lock comprises the following steps: the code numbers of the large code wheel 25 and the small code wheel 26 are rotated clockwise, the unlocking code numbers set in the mounting step S3 of the second embodiment are respectively rotated to the positions aligned with the arrows on the locking machine 7, so that the notch end face 21a of the small code gear and the notch end face 22a of the large code gear are in the positions matched with the notch end face 20a of the semilunar card, at the moment, the semilunar card spring 19 is released, the semilunar card 20 is pushed to the initial position in the step S3 of the second embodiment, and the space for outwards ejecting the lock shaft 23 is left. When the button position 14a of the release button is pressed, the release button 14 rotates clockwise by about 8 degrees through the button shaft 15, the latch 13 moves outwards by about 1mm, the lock shaft 23 is separated from the blocking of the latch 13, under the action of the elastic force of the lock shaft spring 12, the lock shaft 23 returns to the unlocking state in the installation step S3 of the second embodiment, at this time, the top view projection position of the lock catch 6 is located in the notch 23a of the lock shaft, the lock catch 6 can be rotated upwards through the lock catch shaft 3a of the lock catch retainer 3 to be unlocked, the helmet lock catch is taken out from the arc notch of the lock catch 6, and the coded helmet lock 1 is in the unlocking state.

Example four

The coded helmet lock 1 provided by the invention has a special structure, and is used for solving the problem that the coded helmet lock is easy to crack by an exhaustion method because only 2 groups of 8 coded numbers are adopted for convenient operation and only 64 coded combinations are adopted. When the coded helmet lock 1 in the third embodiment is in the locked state, if a person rotates the large code wheel 25 or the small code wheel 26 at will, as long as the arrow on the lock 7 is aligned with more numbers on the large code wheel 25 or the small code wheel 26 after the first rotation is finished and the number on the large code wheel 25 or the small code wheel 26 is not the code set by the user, the half-moon card 20 is still in the position for blocking the lock shaft 23 from popping out, at this time, the release button 14 is pressed at the button position 14a of the release button, the release button 14 rotates clockwise by about 8 degrees through the button shaft 15, the latch 13 moves outwards by about 1mm, the lock shaft 23 is separated from the blocking of the latch 13, the lock shaft 23 pops out under the elastic force of the lock shaft spring 12, but because the half-moon card 20 does not return to the unlocked state at this time, the protruding end surface 23c of the lock shaft can be embedded into the arc-shaped concave surface 20c of the half-moon card, and the half-moon card 20 is locked in the third embodiment. At this time, no matter what kind of password combination is adopted, the half-moon card 20 cannot return to the unlocking position in the unlocking state all the time, and the helmet password lock 1 cannot be unlocked. At the moment, the helmet coded lock 1 is in an anti-cracking state.

After the release button 14 is pressed for the first time, if the helmet coded lock 1 is in the anti-cracking state, unlocking cannot be performed by adopting any code combination, only the lock shaft cover 27 and the lock shaft 23 are pushed inwards by the finger again to separate the protruding end surface 23c of the lock shaft from the arc-shaped concave surface 20c of the semilunar card, at the moment, the helmet lock returns to the locking state in the third embodiment, and unlocking can be completed by re-executing the unlocking step in the third embodiment. Because the latch 13 has certain possibility to break away from the position of blocking the lock shaft 23 because of vibrations when the electric motor car is driven under the bad condition of road conditions, this moment the helmet trick lock 1 also can get into the anti-crack state, only need to carry out above-mentioned step repeatedly and can remove the anti-crack state.

EXAMPLE five

When the coded helmet lock 1 is in an unlocked state, the lock shaft cover 27 is firstly unscrewed from the lock shaft 23 counterclockwise, the code wheel bolt 30 is unscrewed from the small code gear 21 counterclockwise by using the mounting wrench 36, the small code wheel 26 and the large code wheel 25 are sequentially taken out, new code numbers on the large code wheel 25 and the small code wheel 26 are aligned with arrows on the locking machine 7 and then sequentially loaded, the code wheel bolt 30 is screwed from the small code gear 21 clockwise by using the mounting wrench 36, the lock shaft cover 27 is screwed on the lock shaft 23 clockwise, and the step of changing the unlocking code is completed.

Claims

1. A password helmet lock which is characterized in that: the bicycle lock comprises a lock catch (6), a lock machine (7), a release button (14), a half-moon card (20), a small password gear (21), a large password gear (22), a lock shaft (23), a lock cover (24), a large password wheel (25), a small password wheel (26), a lock shaft cover (27), a password wheel cover (28), a handlebar buckle and a handlebar buckle bolt; the locking machine bolt (2) sequentially penetrates through the locking retainer (3), the first locking washer (4), the locking buckle (6), the second locking washer (5) and a connecting hole of the locking machine (7) and is fixed; the key seat (16) is connected with the release key (14) through a key shaft (15), a key spring (17) is arranged between the key seat (16) and the release key (14), one sides of the key seat (16) and the release key (14) are matched and connected with a latch (13), and the latch (13), the release key (14), the key shaft (15), the key seat (16) and the key spring (17) form a release key assembly and are installed in a key pressing groove (7a) of the lock machine (7); the half-moon card shaft (18) is matched and connected with the shaft hole of the half-moon card (20), the half-moon card (20) is connected with the half-moon card spring (19), and the half-moon card shaft (18), the half-moon card spring (19) and the half-moon card (20) are arranged in the lock machine (7); the outer part of the small coded gear (21) is connected with the large coded gear (22) in a matched mode, the small coded gear (21) and the large coded gear (22) penetrate through the lock cover (24) and are installed in a gear hole of the lock machine (7), the lock shaft spring (12) is sleeved on the outer side of the lock shaft (23), the lock shaft (23) penetrates through the lock cover (24) and is installed in a lock shaft hole of the lock machine (7), and the lock cover (24) is connected with the lock machine (7); the code gear shaft (8) is connected with the inside of the small code gear (21) in a matching way; the big code wheel (25) is sleeved on the big code gear (22), the small code wheel (26) is sleeved on the small code gear (21), the notch end face (21a) of the small code gear and the notch end face (22a) of the big code gear are matched with the notch end face (20a) of the half-moon card, a code wheel bolt (30) penetrates through a code wheel cover (28) on the outer side of the small code wheel (26) and is screwed tightly through the thread of the small code gear (21), and the lock shaft cover (27) is installed on the thread of the lock shaft (23); the lower part of the locking machine (7) is connected with a left handlebar buckle (31) and a right handlebar buckle (32) and is fixed on a handle steel pipe of the electric bicycle.

2. The combination helmet lock of claim 1, wherein: the bulges (16a) at the two sides of the key base (16) are matched with the key pressing groove (7a) of the lock (7).

3. The combination helmet lock of claim 1, wherein: the thickness of the first lock washer (4) and the second lock washer (5) is 3mm-4 mm.

4. The combination helmet lock of claim 1, wherein: the outer diameter of the large code wheel (25) is 4-6mm larger than that of the small code wheel (26).

5. The combination helmet lock of claim 1, wherein: the code gear elastic sheet comprises a first code gear elastic sheet (9), a second code gear elastic sheet (10) and a third code gear elastic sheet (11), and is arranged on the outer sides of a small code gear (21) and a large code gear (22) in the lock machine (7).

6. The combination helmet lock of claim 5, wherein: the center of the axis of the code gear shaft (8) is used as the center of a circle, the first code gear elastic sheet (9) and the second code gear elastic sheet (10) form an included angle of 135 degrees, the third code gear elastic sheet (11) and the second code gear elastic sheet (10) form an included angle of 112.5 degrees, and the first code gear elastic sheet (9) and the third code gear elastic sheet (11) form an included angle of 112.5 degrees.

7. The combination helmet lock of claim 1, wherein: the locking cover (24) is fixedly connected with the locking machine (7) through a locking cover screw (29).

8. The combination helmet lock of claim 1, wherein: the lower part of the locking machine (7) is matched and connected with a left handlebar buckle (31) and a right handlebar buckle (32) through a handlebar buckle long bolt (33), a handlebar buckle short bolt (34) and a handlebar buckle nut (35) and is fixed on a handle steel pipe of the electric bicycle.

9. The combination helmet lock of claim 1, wherein: the screw heads of the locking machine bolt (2) and the password wheel bolt (30) are matched with an inner hexagon on the installation wrench (36).

10. A method of installing a combination helmet lock according to claim 1, comprising the steps of:

s1, sequentially connecting the lock retainer (3), the first lock washer (4), the lock (6), the second lock washer (5) and the lock (7) through the lock bolt (2), and screwing the lock bolt (2) by using an installation wrench (36);

s2, assembling the latch (13), the release key (14), the key shaft (15), the key seat (16) and the key spring (17) into a release key assembly, and then installing the release key assembly into a key pressing groove (7a) of the lock machine (7), wherein the bulges (16a) at the two sides of the key seat (16) are tightly matched with the key pressing groove (7a) of the lock machine (7); then assembling the half-moon card shaft (18), the half-moon card spring (19) and the half-moon card (20), and loading the half-moon card shaft, the half-moon card spring and the half-moon card into the locking machine (7) after the assembly is finished; the coded gear shaft (8) is connected with the inside of the small coded gear (21) in a matching way, the outside of the small coded gear (21) is connected with the large coded gear (22) in a matching way, the small coded gear (21) and the large coded gear (22) penetrate through the lock cover (24) and are arranged in a gear hole of the locking machine (7), the lock shaft spring (12) is sleeved on the outer side of the lock shaft (23), the lock shaft (23) penetrates through the lock cover (24) and is arranged in a lock shaft hole of the locking machine (7), and the lock cover (24) is connected and fixed with the locking machine (7) through a lock cover screw (29);

s3, firstly sleeving a large password wheel (25) on a large password gear (22), then sleeving a small password wheel (26) on the small password gear (21), so that the notch end face (21a) of the small password gear and the notch end face (22a) of the large password gear are matched with the notch end face (20a) of the half-moon card, the password number positions on the large password wheel (25) and the small password wheel (26) are aligned with an arrow (7b) on a locking machine (7), the group of numbers are unlocking passwords of the password helmet lock (1), and a mounting wrench (36) is used for screwing a password wheel bolt (30) through a password wheel cover (28) through the thread of the small password gear (21) and screwing a lock shaft cover (27) on the thread of a lock shaft (23);

s4, fixing the assembled coded helmet lock main body, the left handlebar buckle (31) and the right handlebar buckle (32) on a handle steel pipe of the electric bicycle through the handlebar buckle long bolt (33), the handlebar buckle short bolt (34) and the handlebar buckle nut (35), and using the installation wrench (36) for auxiliary installation.