CN105996274B - A kind of limit rotation mechanism - Google Patents

Abstract

The present invention relates to a kind of limit rotation mechanisms, are used for motorcycle helmet, which includes helmet main body and mask, the both sides of helmet main body are respectively equipped with a coupling mechanism, the both sides of mask are respectively equipped with an ear, and each ear couples with a coupling mechanism respectively, and each coupling mechanism includes：Shell；The limit rotation mechanism is installed in shell so that middle case just rotates under scheduled outer force effect；The limit rotation mechanism includes gear, limit transcapsidation, limit turns bayonet lock, limit turns compression spring and limit turns head part；It includes that limit turns top plate, limit turns screw rod and limit changes hands wheel that the limit, which turns head part,；Limit turns compression spring and is installed on limit to turn in sliding slot, and rotation limit changes hands wheel and makees to turn the movement of the bayonet lock portion of being slidably matched closer or far from limit to drive limit to turn top plate.The limit rotation mechanism of the present invention turns head part and can adjust limit and turn the decrement of compression spring to turn the elastic force of compression spring to adjust limit by the way that limit is arranged, and so that limit rotation mechanism is reliably worked, the function of limiting rotation mechanism is maintained always, with the stability for improving service life and using.

Description

A kind of limit rotation mechanism

Technical field

The present invention relates to a kind of limit rotation mechanism, especially a kind of limit rotation mechanisms on motorcycle helmet.

Background technology

Motorcycle driver must put on the helmet to protect its head.Existing motorcycle helmet, which generally comprises, to be worn on the head Helmet main body and transparent mask, mask be installed in rotation in helmet main body by the linkwork of both sides, be not required to Using can be pushed into, far from face, can be pushed into downwards to block face when needing using mask when mask upwards.By mask come Prevent face and eye damage of the substances such as wind, rain, dirt to driver.

When without using motorcycle helmet, need to store it, if place it in it is outer easily stolen, therefore one As be deposited into the railway carriage below cushion.Since the space of railway carriage is limited, especially raincoat, water bottle, knapsack are being housed After equal articles for use, railway carriage it is remaining can parking space just become smaller.And mask and helmet main body are made because of the assembly relation of the two At very big space is occupied, it is stored inconveniently in railway carriage.

It is general to be provided with limit rotation mechanism in order to make mask that can be rested on any turned position in rotation process, make It obtains mask just to rotate under scheduled outer force effect, after cancelling external force, limit rotation mechanism overcomes the gravity of mask to no longer rotate, real Existing mask can rest in rotation process on any turned position.

Existing limit rotation mechanism generally realized using the effect of spring, but spring its elasticity in use for some time Power can be reduced, and cause limit rotation mechanism to lose its effect, service life is short, and stability is poor.

Invention content

In order to overcome the problems, such as that service life is short in the prior art, the embodiment of the present invention provides a kind of limit rotation mechanism, is used for On motorcycle helmet, which includes helmet main body and mask, and the both sides of helmet main body are respectively equipped with a coupling mechanism, The both sides of mask are respectively equipped with an ear, and each ear couples with a coupling mechanism respectively, and each coupling mechanism includes：Shell, Including inside shell, middle case and outer shell, inside shell and outer shell separate from the both sides of middle case, and inside shell is fixedly mounted on head On helmet ontology, middle case is installed in rotation on the shell of inside, and outer shell is fixedly mounted on middle case, outer shell and middle case Between be formed with the slot plugged for ear；Rotation mechanism is limited, is installed in shell so that middle case is in scheduled outer force effect It is lower just to rotate；Helmet main body is equipped with installation stud, and inside shell is equipped with positioning convex column, centre bore is equipped in positioning convex column, in Between shell be equipped with turn hole, positioning convex column includes enlarged diameter section and reduced diameter section in ladder shaft-like, enlarged diameter section and reduced diameter section Junction formed convex shoulder；Middle case is rotationally set in outside the reduced diameter section of positioning convex column through turn hole, and installation stud is inserted into In centre bore, a screw be inserted into centre bore and with installation stud screw-thread fit, the head of screw and the reduced diameter section of positioning convex column End offset and inside shell be fastened in helmet main body, middle case is limited between the head of screw and convex shoulder；The limit Rotation mechanism includes gear, limit transcapsidation, limit turns bayonet lock, limit turns compression spring and limit turns head part；The gear is fixedly mounted in positioning convex column Enlarged diameter section on；The limit transcapsidation is fixedly mounted on middle case, and limit is equipped in the limit transcapsidation and turns sliding slot, is set in the limit transcapsidation Have and turns the limit transcapsidation opening that sliding slot is connected to limit；It includes that limit turns top plate, limit turns screw rod and limit changes hands wheel that the limit, which turns head part, and limit turns Top plate is slippingly installed on limit and turns in sliding slot, and one end that limit turns screw rod is pressed on limit and turns on top plate, and limit turns the other end of screw rod It stretches out outside limit transcapsidation and changes hands wheel with limit and connect, limit turns screw rod and limit transcapsidation screw-thread fit；It includes mutually being connected on one that the limit, which turns bayonet lock, The limit risen turns that bayonet lock is slidably matched portion and limit turns bayonet lock protrusion, which turns the bayonet lock portion of being slidably matched and be slidably mounted on limit to turn In sliding slot, which turns bayonet lock protrusion and stretches out in outside limit transcapsidation and stretched into the tooth socket of gear from limit transcapsidation opening, which turns card Pin protrusion is when middle case is rotated from the tooth socket that the tooth socket of the gear currently stretched into jumps into another gear；Limit turns bayonet lock protrusion Portion is tapered, and the both sides which turns bayonet lock protrusion are respectively equipped with limit and turn bayonet lock inclined-plane；Limit turns compression spring and is installed on limit to turn in sliding slot, One end contact limit that limit turns compression spring turns bayonet lock and is slidably matched portion, and the other end contact limit that limit turns compression spring turns top plate, and rotation limit is changed hands Wheel is made to turn the movement of the bayonet lock portion of being slidably matched closer or far from limit to drive limit to turn top plate.

The present invention limits rotation mechanism by setting and mask is rotated under scheduled external force (such as manual dynamicthrust) effect, Overcome the gravity of mask itself to stop operating after cancelling scheduled external force, and rests on the position after rotation.

The present invention limit rotation mechanism by be arranged limit turn head part can adjust limit turn the decrement of compression spring with adjust limit turn press The elastic force of spring makes limit rotation mechanism reliably work, and maintains the function of limit rotation mechanism always, to improve service life and use Stability.

Description of the drawings

Fig. 1 shows the stereoscopic schematic diagram of motorcycle helmet；

Fig. 2 shows mask is detached to the stereoscopic schematic diagram after helmet body；

Fig. 3 shows the perspective exploded view of motorcycle helmet；

Fig. 4 shows the perspective exploded view of another angle of motorcycle helmet, wherein hiding helmet body and mask；

Fig. 5 shows that the schematic diagram after slot is extracted by ear, wherein hiding helmet body and outer shell；

Fig. 6 shows the A-A sectional views of Fig. 1；

Fig. 7 shows the B-B sectional views of Fig. 6；

Fig. 8 shows the portions the C partial enlarged view of Fig. 6；

Fig. 9 shows the portions the D partial enlarged view of Fig. 6；

Figure 10 shows the portions the E partial enlarged view of Fig. 6；

Figure 11 shows the portions the F partial enlarged view of Fig. 7；

Figure 12 shows the portions the G partial enlarged view of Fig. 7；

Figure 13, which is shown, extracts ear on the basis of Fig. 6 in the schematic diagram after slot；

Figure 14, which is shown, extracts ear on the basis of Fig. 7 in the schematic diagram after slot；

Figure 15 shows the portions the H partial enlarged view of Figure 13；

Figure 16 shows the portions the J partial enlarged view of Figure 14；

Figure 17 shows the portions the K partial enlarged views of Figure 14；

Figure 18 shows the stereoscopic schematic diagram of lock ear mechanism；

Figure 19 shows the stereoscopic schematic diagram of the lock ear mechanism after separation lock ear shell；

Figure 20 shows the perspective exploded view of lock ear mechanism；

Figure 21 shows the stereoscopic schematic diagram of ejecting mechanism；

Figure 22 shows the perspective exploded view of ejecting mechanism；

Figure 23 shows the stereoscopic schematic diagram of limit rotation mechanism；

Figure 24 shows the perspective exploded view of limit rotation mechanism；

Figure 25 shows the stereoscopic schematic diagram of lock rotation mechanism；

Figure 26 shows the stereoscopic schematic diagram of the lock rotation mechanism after separation lock transcapsidation；

Figure 27 shows the perspective exploded view of lock rotation mechanism.

Specific implementation mode：

A kind of motorcycle helmet as shown in Fig. 1 to Figure 27 includes 10 He of helmet main body for being worn on driver's head The both sides of transparent mask 20, helmet main body 10 are respectively equipped with a coupling mechanism 30, and the both sides of mask 20 are respectively equipped with an ear 201, each ear 201 couples with a coupling mechanism 30 respectively, and especially, each ear 201 is inserted respectively in a manner of removable Enter in a coupling mechanism 30, each coupling mechanism includes：

As shown in Figure 3 and Figure 4, shell 40 comprising inside shell 401, middle case 402 and outer shell 403, inside shell 401 The both sides of middle case 402 are separated from outer shell 403, inside shell 401 is fixedly mounted in helmet main body 10, and middle case 402 can Be rotatably mounted inside shell 401 on, outer shell 403 is fixedly mounted on middle case 402, in the present embodiment, outer shell 403 with Middle case 402 is connected by a snap structure (not shown) and snaps together, i.e., outer shell 403 is fastened on middle case 402 Together, in order to the dismounting of outer shell, existing buckle connecting structure may be used in the buckle connecting structure of the present embodiment, The slot 404 plugged for ear 201 is formed between outer shell 403 and middle case 402 to realize ear 201 and coupling mechanism 30 connection, in the present embodiment, shell 40 is equipped with the notch 405 be connected to slot 404, and especially, notch 405 is set on outer shell Between 403 and middle case 402, ear 201 is inserted into through notch 405 in slot 404, is formed between inside shell 401 and middle case 402 There is a limit to turn room 406；The shell structure of the present embodiment is simple, realizes the rotatable assembly in middle case and outside, that is, realizes mask It is rotatable, can be pushed into far from face, can be pushed into downwards to block when needing using mask upwards when mask need not be used Face；Limit is turned room and is independently separated with slot by the shell mechanism of the present invention, is avoided ear and is first turned indoor parts (such as tooth Wheel) it collides, rub；

Lock ear mechanism 50 is installed in shell 40, for locking the ear 201 being inserted into slot 404 to prevent ear 201 Extract slot 404, especially, the lock ear mechanism 50 be used for lock or unclamp be inserted into slot 404 in ear 201 with prevent or Person allows ear 201 to extract slot 404；The present invention can surprisingly be taken off by the way that lock ear mechanism is arranged to avoid the ear being inserted into slot From slot, that is, mask and helmet main body accidental separation are avoided, ensures the safety and reliability used.

Button 60 is installed in shell 40, and for driver's Manual press, button 60 couples with lock ear mechanism 50, in button 60 when being pressed, which unclamps the ear 201 being inserted into slot 404 to allow ear 201 to extract slot 404；This Invention can be convenient for driver that dismounting mask is manually operated by the way that button is arranged so that the convenient disassembly of mask, quick；Mask can be with It tears open with dress.

Ejecting mechanism 70, is installed in shell 40, is especially mounted in slot 404, makes the ear in insertion slot 404 201 have the trend of slot 404 of exiting, i.e., ejecting mechanism 70, which pushes away, makes ear 201 in insertion slot 404 towards exiting slot 404 direction movement.The present invention is by being arranged ejecting mechanism, and when ear is unclamped by lock ear mechanism, ejecting mechanism will initiatively be inserted Enter ear in slot toward pushing outside slot, can enable driver easily, rapidly extract ear.

Rotation mechanism 80 is limited, is installed in shell 40, limit is especially mounted to and turns in room 406 so that middle case 402 is predetermined Outer force effect under just rotate；The present invention limits rotation mechanism by setting and makes mask at scheduled external force (such as manual dynamicthrust) The lower rotation of effect, overcomes the gravity of mask itself to stop operating after cancelling scheduled external force, and after resting on rotation Position.

Rotation mechanism 90 is locked, is installed in shell 40, is especially mounted in middle case 402, slot is inserted into ear 201 Allow middle case 402 to rotate after 404, and prevents middle case 402 from rotating after slot 404 is extracted by ear 201.If mask with After helmet main body separation, the middle case (including outer shell) of helmet main body both sides relatively rotates, and causes the slot position of both sides It sets and is staggered not parallel, when mask to be installed, the ear of both masks needs to find the position of slot respectively, will produce installation in this way Difficult problem.In order to solve the technical problem, the present invention locks rotation mechanism by setting so that after ear is inserted into slot, face Cover allows to rotate together with middle case (including outer shell), after slot is extracted by ear (after i.e. mask is detached from helmet main body), in Between shell (including outer shell) forbid rotating, the middle cases (including outer shell) of such helmet main body both sides, which can only actually synchronize, to be turned It is dynamic, it cannot relatively rotate, the slot position of both sides is avoided to be staggered not parallel and problem difficult to install is caused to occur.

In the present embodiment, lock rotation mechanism 90 separates from the both sides of slot 404 with lock ear mechanism 50.

As shown in Figures 3 to 10, which is equipped with installation stud 101, especially, the two of the helmet main body 10 Side is respectively equipped with an installation stud 101, and each installation stud 101 is equipped with fixed for installing a coupling mechanism 30, inside shell 401 Position pillar 407 is equipped with centre bore 408 in positioning convex column 407, and middle case 402 is equipped with turn hole 409, and positioning convex column 407 is in ladder Shaft-like and include enlarged diameter section 410 and reduced diameter section 411, the junction of enlarged diameter section 410 and reduced diameter section 411 forms convex shoulder 412；

Middle case 402 is rotationally set in through turn hole 409 outside the reduced diameter section 411 of positioning convex column, and installation stud 101 is inserted Enter in centre bore 408, a screw 413 be inserted into centre bore 408 and with installation 101 screw-thread fit of stud, the head 414 of screw with it is fixed The end 415 of the reduced diameter section of position pillar offsets and inside shell 401 is fastened in helmet main body 10, and middle case 402 is placed restrictions on So that middle case 402 is axially located and circumferentially rotates between the head of screw 414 and convex shoulder 412, that is to say, that middle case 402 along the movement of the axis direction of positioning convex column 407 be that located, and middle case 402 can be around the reduced diameter section 411 of positioning convex column Rotation, i.e. middle case 402 are rotated around the axis of positioning convex column 407.The shell structure of the present invention makes screw be hidden in shell In, play the role of dust-proof, waterproof, avoids screw is exposed from generating phenomena such as getting rusty, damaging because exposing to the sun and rain.It needs to dismount spiral shell When nail, only outer shell need to be opened.

As shown in Fig. 5, Fig. 7, Figure 11, Figure 14, Figure 16, Figure 18, Figure 19 and Figure 20, which includes lock ear shell 501, lock ear bolt 502, lock ear drive rod 503, lock ear connecting rod 504, lock ear abduction rod 505 and lock ear torsional spring 506；

In the present embodiment, during which is put together by two half-shells, and it is mounted on by the first screw 507 Between in shell 402；

It is equipped with lock ear vessel 508 in the lock ear shell 501, lock ear fixing axle 509, the lock ear shell are equipped in lock ear vessel 508 501 are equipped with the opening of lock ear first 510 and the opening of lock ear second 511, the lock ear first opening 510 and the opening of lock ear second 511 It is connected to lock ear vessel 508；

The lock ear bolt 502 includes that the lock ear bolt that is connected together is slidably matched portion 512 and lock ear bolt protrusion 513, the lock ear bolt portion 512 that is slidably matched is slidably mounted in lock ear vessel 508, and the lock ear bolt is slidably matched portion 512 the inner wall for the lock ear shell 501 for surrounding lock ear vessel 508 guiding lower slider, the lock ear bolt protrusion 513 is from lock ear One opening 510 is stretched out in outside lock ear vessel 508 and is stretched into slot 404；

The lock ear drive rod 503 include the lock ear drive rod that is connected together be slidably matched portion 514 and lock ear drive rod it is convex Go out portion 515, the lock ear drive rod portion 514 that is slidably matched is slidably mounted in lock ear vessel 508, and the lock ear drive rod is slided Dynamic auxiliary section 514 is in the guiding lower slider of the inner wall for the lock ear shell 501 for surrounding lock ear vessel 508, the lock ear drive rod protrusion 515 stretch out in from the opening of lock ear second 511 outside lock ear vessel 508, which is fixedly mounted in lock ear drive rod protrusion On 515；

The glide direction of the lock ear bolt 502 is vertical with the glide direction of lock ear drive rod 503；

The lock ear abduction rod 505 includes the galianconism 516 and long-armed 517 being connected together, one end of galianconism 516 and long-armed 517 One end connect, the other end of galianconism 516 is equipped with lock ear idler wheel 518, one end of long-armed 517 other end and lock ear connecting rod 504 Hinged, the other end and the lock ear bolt of lock ear connecting rod 504 portion 512 that is slidably matched are hinged；

The joint of the galianconism 516 and long-armed 517 is equipped with lock ear perforation 519, which perforates through lock ear 519 are rotatably mounted around in lock ear fixing axle 509；

The lock ear drive rod is slidably matched portion 514 equipped with lock ear drive rod inclined-plane 520, and lock ear idler wheel 518 is pressed on lock So that lock ear idler wheel 518 is slided along lock ear drive rod inclined-plane 520 on ear drive rod inclined-plane 520, presses button 60 and lock ear is made to drive Lever 503 drives lock ear abduction rod 505, and around lock ear fixing axle 509, O is rotated along clockwise direction, when release button 60, lock ear torsional spring 506 drive lock ear abduction rod 505, and around lock ear fixing axle 509, P is rotated and lock ear drive rod 503 is driven to reset in the counterclockwise direction；

The lock ear torsional spring 506 is sleeved in lock ear fixing axle 509, and an elastic arm 521 of the lock ear torsional spring is solid mounted on lock ear On dead axle 509, another elastic arm 522 of the lock ear torsional spring is mounted in lock ear abduction rod 505, especially, the lock ear torsional spring it is another Elastic arm 522 is mounted on long-armed 517, and lock ear torsional spring 506 makes lock ear abduction rod 505 have around lock ear fixing axle 509 along side counterclockwise The trend rotated to P, lock ear torsional spring 506 acts in lock ear abduction rod 505 so that lock ear idler wheel 518 contacts and compresses lock ear always Drive rod inclined-plane 520；

Lock ear bolt 502 is driven to be unclamped in a latched position (as seen in figs. 7 and 11) and one when lock ear abduction rod 505 rotates Switch between position (as shown in Figure 14 and Figure 16), when which is in the locked position, the lock ear mechanism 50 locking is inserted Enter the ear 201 in slot 404 to prevent ear 201 from extracting slot 404；When the lock ear bolt 502 is in released position, the lock Ear mechanism 50 unclamps the ear 201 being inserted into slot 404 to allow ear 201 to extract slot 404；

Ear 201 is equipped with recess 202, and in the present embodiment, recess 202 is located at 203 position of top edge of ear；

Lock ear abduction rod 505 around lock ear fixing axle 509 O is rotated along clockwise direction when, lock ear bolt 502 is from latched position Switch to released position；

Lock ear abduction rod 505 around lock ear fixing axle 509 P is rotated in the counterclockwise direction when, lock ear bolt 502 is from released position Switch to latched position；Wherein,

When lock ear bolt 502 is in the locked position, lock ear bolt protrusion 513 stretches into the ear being inserted into slot 404 To prevent ear 201 from extracting slot 404 in recess 202；

When lock ear bolt 502 is in released position, lock ear bolt protrusion 513 exits the ear being inserted into slot 404 Recess 202 is to allow ear 201 to extract slot 404.

In the present embodiment, does not have in ear 201 and be inserted into slot 404, lock ear bolt 502 is in the locked position.

The lock ear mechanism of the present invention makes the glide direction and lock ear drive rod of the lock ear bolt by the way that lock ear abduction rod is arranged Glide direction (i.e. the pressing direction of button) be mutually perpendicular to, in this way can in order to which button is arranged at the outer end face of shell, After removing motorcycle helmet, since the outer end face of shell is all revealed in the range of visibility of driver, it can be convenient for driving The person of sailing looks for button.In addition, the lock ear mechanism structure of the present invention is simple, reasonable design.By length to galianconism with it is long-armed The reasonable selection that length carries out can make the small stroke motion of lock ear drive rod drive the big stroke motion of lock ear bolt, lock ear The big stroke motion of bolt is conducive to steadily and reliably lock ear, and the small stroke motion of lock ear drive rod is conducive to entirely The space layout of coupling mechanism designs, and convenient for reducing the occupied space of coupling mechanism, can especially reduce the thickness of coupling mechanism Spend the size on direction (i.e. the pressing direction of button).

The lock ear bolt protrusion 513 is equipped with lock ear bolt inclined-plane 523, and ear 201 is equipped with the first ear inclined-plane 204, when ear 201 is inserted into slot 404 outside slot 404, the first ear inclined-plane 204 compresses lock ear bolt inclined-plane 523 and makes Lock ear bolt 502 is slided from latched position to released position, i.e., O is rotated lock ear bolt 502 along clockwise direction at this time, at this In the process, lock ear abduction rod 505 can more easily be inserted into ear, at least exist in this way there is no the sliding of lock ear drive rod is driven During being inserted into ear, the power for driving button and the sliding of lock ear drive rod need not be spent；The present invention is inserted by the way that lock ear is arranged Pin inclined-plane drives lock ear bolt to be slided from latched position to released position while ear can be made to be inserted into slot outside slot, And after ear is fully inserted into slot, lock ear bolt protrusion is fallen into the recess in ear；By the way that the first ear inclined-plane is arranged Lock ear bolt can be driven to slide conducive to ear；

As shown in Figure 3 and Figure 4, shell 40 includes inner face 416, side 417 and the outer end face opposite with inner face 416 418, side 417 is connected between inner face 416 and outer end face 418, and inner face 416 is towards helmet main body 10,418 court of outer end face Outside, i.e., outer end face 418 protrudes from outer end face 418 backwards to helmet main body 10, button 60；

The galianconism 516 and long-armed 517 angle are right angles；

The length of galianconism 516 is less than long-armed 517 length；

Inner face 416 is located on inside shell 401, and outer end face 418 is located in outer shell 403, and side 417 is located at middle case On, certainly, side 417 can also be made of the side of inside shell 401, middle case 402 and outer shell 403 simultaneously.

As shown in Fig. 5, Fig. 6, Fig. 9, Figure 13, Figure 15, Figure 21 and Figure 22, which includes pop-up shell 701, pop-up Pushing block 702 and pop-up compression spring 703；

It is also put together by two half-shells the pop-up shell 701, and it is mounted on middle case 402 by the second screw 704 In, pop-up vessel 705 is equipped in the pop-up shell 701, which is equipped with the pop-up being connected to pop-up vessel 705 and is open 706；

It includes outside plate 707, middle interconnecting piece 708 and inner panel 709 to pop up pushing block 702, which is slidably mounted on It pops up in vessel 705, one end of the middle interconnecting piece 708 connects with inner panel 709, and the other end of the middle interconnecting piece 708 is through bullet Go out opening 706 to stretch out outside pop-up vessel 705 and with outside plate 707 connect；

Pop-up compression spring 703 is installed in pop-up vessel 705；

One end contact for popping up compression spring 703 pops up shell 701, pops up the other end contact inner panel 709 of compression spring 703；

Pushing block 702 is popped up in a compression position (as shown in figure Fig. 6 and Fig. 9) and an ejected position (such as Figure 13 and Figure 15 institutes Show) between slide, pop-up compression spring 703 makes pop-up pushing block 702 have the trend of ejected position of returning to, that is, pops up compression spring 703 and act on Pop-up pushing block 702 is set to be moved from compression position to ejected position on pop-up pushing block 702；

When ear 201 is inserted into slot 404 outside slot 404,201 top pressure outside plate of ear, 707 (the especially end face of ear 205 top pressure outside plates 707) and pushing away makes pop-up pushing block 702 slide into compression position from ejected position.

Pushing block 702 is popped up in compression position, outside plate 707 offsets with pop-up shell 701；

Pushing block 702 is popped up in ejected position, inner panel 709 is supported with pop-up shell phase；Realize therefrom by pop up shell 701 come Movement to popping up pushing block 702 limits.

The ejecting mechanism of the present invention is simple in structure.

As shown in Fig. 6, Fig. 8, Figure 13, Figure 23 and Figure 24, which includes being located at the gear for limiting and turning in room 406 801, transcapsidation 802 is limited, limit turns bayonet lock 803, limit turns compression spring 804 and limit turns head part 805；

In the present embodiment, which is also put together by two half-shells, and it is mounted on by third screw 806 In middle case 402；

The gear 801 is fixedly mounted on the enlarged diameter section 410 of positioning convex column；

The limit transcapsidation 802, which is fixedly mounted on middle case 402 so as to limit transcapsidation 802, follows middle case 402 to rotate, the limit It is equipped with limit in transcapsidation 802 and turns sliding slot 807, which is equipped with turns the limit transcapsidation opening 808 that sliding slot 807 is connected to limit；

It includes that limit turns top plate 809, limit turns screw rod 810 and limit changes hands wheel 811 that the limit, which turns head part 805, and limit turns top plate 809 can It is slippingly installed on limit to turn in sliding slot 807, one end that limit turns screw rod 810 is pressed on limit and turns on top plate 809, and limit turns screw rod 810 The other end, which stretches out outside limit transcapsidation 802 and changes hands wheel 811 with limit, to connect, and limit turns screw rod 810 and limit 802 screw-thread fit of transcapsidation, passes through Driving limit to change hands 811 rotation of wheel manually can drive limit to turn top plate 809 to turn to slide in sliding slot 807 in limit, easy to adjust quick, It is the elastic force that adjustable limit turns compression spring without disassembling limit transcapsidation；

It includes that the limit that is connected together turns that bayonet lock is slidably matched portion 812 and limit turns bayonet lock protrusion that the limit, which turns bayonet lock 803, 813, which turns the bayonet lock portion 812 that is slidably matched and is slidably mounted on limit and turns in sliding slot 807, the limit turn bayonet lock protrusion 813 from Limit transcapsidation opening 808 is stretched out in outside limit transcapsidation 802 and is stretched into the tooth socket of gear 801, which turns bayonet lock protrusion 813 in centre When shell 402 rotates from the tooth socket that the tooth socket of the gear 801 currently stretched into jumps into another gear 801；

The both sides that limit turns bayonet lock protrusion 813 are respectively provided with the limit coordinated with the flank of tooth of gear 801 and turn bayonet lock inclined-plane 814, limit turns that bayonet lock protrusion 813 is tapered, turns bayonet lock 803 when middle case 402 is rotated from the tooth currently stretched into order to limit The tooth socket of wheel 801 is jumped into the tooth socket of another gear 801；

Limit turns compression spring 804 and is installed on limit to turn in sliding slot 807, and one end contact limit that limit turns compression spring 804 turns bayonet lock and is slidably matched Portion 812, the other end contact limit that limit turns compression spring 804 turn top plate 809, and rotation limit is changed hands wheel 811 and leaned on driving limit to turn top plate 809 Turn bayonet lock close or remote from limit and is slidably matched the movement of portion 812 to control the decrement that limit turns compression spring 804.

Limit turns compression spring, and its elastic force can be reduced in use for some time, cause limit rotation mechanism to lose its effect, mask exists Expected position can not be rested under the action of its own gravity.The limit rotation mechanism of the present embodiment turns head part by setting limit to be adjusted Section limit turns the decrement of compression spring to adjust the elastic force that limit turns compression spring, and limit rotation mechanism is made reliably to work, and maintains limit favourable turn always The function of structure.

As shown in Fig. 5, figure Fig. 7, Figure 12, Figure 14, Figure 17, Figure 25, Figure 26 and Figure 27, which includes lock transcapsidation 901, lock turns bayonet lock 902, lock turns drive rod 903, lock turns bent axle 904, lock rotating cam 905, lock turn torsional spring 906, lock turns compression spring 907 Turn connecting rod 900 with lock；

In the present embodiment, which is also put together by two half-shells, and it is mounted on by the 4th screw 908 In middle case 402；

It is equipped with lock in the lock transcapsidation 901 and turns vessel 909, which is equipped with that lock turns the first opening 910 and lock turns the Two openings 911, which turns the first opening 910 and the second opening 911 of lock turn turns vessel 909 with lock and is connected to；

It includes that the lock that is connected together turns that bayonet lock is slidably matched portion 912 and lock turns bayonet lock protrusion that the lock, which turns bayonet lock 902, 913, which turns the bayonet lock portion 912 that is slidably matched and is slidably mounted in lock and turns in vessel 909, and the lock turns bayonet lock and is slidably matched portion 912 surround lock turn vessel 909 lock transcapsidation 901 inner wall guiding lower slider, which turns bayonet lock protrusion 913 and turns the from lock One opening 910 stretches out in lock, and to turn vessel 909 outer and stretch into limit and turn in room 406, which turns the bayonet lock portion 912 that is slidably matched and be equipped with lock Rotary wheel frame 914 is locked and is equipped with lock tumbler wheel 915 on rotary wheel frame 914；

The lock turn drive rod 903 include the lock that is connected together turn drive rod be slidably matched portion 916 and lock to turn drive rod convex Go out portion 917, which turns the drive rod portion 916 that is slidably matched and be slidably mounted in lock and turn in vessel 909, and the lock turns drive rod cunning Dynamic auxiliary section 916 turns drive rod protrusion in the guiding lower slider for surrounding the inner wall for locking the lock transcapsidation 901 for turning vessel 909, the lock 918, which from lock turn the second opening 911, stretches out in lock and turns that vessel 909 is outer and stretch into slot 404, which turns drive rod protrusion 918 It is equipped with lock and turns drive rod inclined-plane 919；

The lock turns the glide direction of bayonet lock 902, and to turn the glide direction of drive rod 903 with lock be parallel；

The lock turns bent axle 904 and is rotatably installed on lock to turn in vessel 909, which is fixedly mounted in lock Turn on bent axle 904, and make lock rotating cam 905 that lock be followed to turn the axis rotation that bent axle 904 turns bent axle 904 around lock, which turns bent axle 904 are equipped with rod journal 920, and especially, which turns the rod journal 920 that bent axle 904 is equipped with radial deflection, and lock turns connecting rod 900 One end be hinged on rod journal 920, the other end that lock turns connecting rod 900 is hinged on lock and turns drive rod and is slidably matched in portion 916；

There is distal end Q and proximal end R, centers of rotation of the distal end Q from lock rotating cam 905 is (i.e. on the profile of the lock rotating cam 905 Lock turns the axle center of bent axle 904) distance be N, proximal end R is M with a distance from the center of rotation from lock rotating cam 905, wherein N>M；

The lock turns compression spring 907 and turns in vessel 909 mounted on lock, which turns one end contact lock transcapsidation 901 of compression spring 907, should The other end contact lock that lock turns compression spring 907 turns bayonet lock and is slidably matched portion 912, which turns the lock tumbler that compression spring 907 makes lock turn bayonet lock Wheel 915 and the profile of lock rotating cam 905 are kept in contact；

The lock turns torsional spring 906 and is sleeved on lock to turn on bent axle 904, and the elastic arm which turns torsional spring is mounted in lock transcapsidation 901, Another elastic arm that the lock turns torsional spring turns mounted on lock on bent axle 904, and lock, which turns torsional spring 906, makes lock turn bent axle 904 with along clockwise The trend of direction O rotations；

The lock turns to set (as shown in figure Figure 14 and Figure 17) in a bayonet lock taboo indexing when bayonet lock 902 slides and a bayonet lock is accurate indexable Switch between setting (as shown in figures 7 and 12)；

The lock turns bayonet lock 902 and is in bayonet lock to prohibit indexing when setting, and lock tumbler wheel 915 is remote on the profile for locking rotating cam 905 Q contacts, lock is held to turn bayonet lock protrusion 913 and stretch into the tooth socket of gear 801 to prevent middle case 402 from rotating；

When the lock turns bayonet lock 902 and is in the quasi- indexing of bayonet lock and sets, lock tumbler wheel 915 is close on the profile for locking rotating cam 905 R contacts, lock is held to turn bayonet lock protrusion 913 and exit the tooth socket of gear 801 to allow middle case 402 to rotate；

The lock, which turns to prohibit indexing in a drive rod when drive rod 903 slides, to be set (as shown in figure Figure 14 and Figure 17) and a drive rod Quasi- indexing switches between setting (as shown in figures 7 and 12)；

The lock turns drive rod 903 and is in drive rod to prohibit indexing when setting, which turns bayonet lock 902 and be in bayonet lock taboo indexing to set；

When the lock turns drive rod 903 and is in the quasi- indexing of drive rod and sets, which turns bayonet lock 902 and is in the quasi- indexing of bayonet lock to set；

Lock turn drive rod 903 from drive rod prohibit indexing set set sliding to the quasi- indexing of drive rod when, lock turn drive rod 903 drive Lock turns bent axle 904, and P is rotated in the counterclockwise direction, and along the profile of lock rotating cam 905, from distal end Q, proximally R is transported lock tumbler wheel 915 Dynamic, lock, which turns bayonet lock 902, from bayonet lock to be prohibited indexing and sets to the quasi- indexing of bayonet lock and set sliding；

Lock turn drive rod 903 from the quasi- indexing of drive rod set to drive rod prohibit indexing set sliding when, lock turn drive rod 903 drive Lock turns bent axle 904, and O is rotated along clockwise direction, and along the profile of lock rotating cam 905, proximally R is transported lock tumbler wheel 915 to distal end Q Dynamic, lock, which turns bayonet lock 902, to be set from the quasi- indexing of bayonet lock and prohibits indexing to bayonet lock and set sliding；

When ear 201 is inserted into slot 404 outside slot 404, ear 201 compresses lock and turns drive rod inclined-plane 919 and make lock Turn drive rod 903 and from drive rod prohibit indexing and set to the quasi- indexing of drive rod to set sliding, and finally locks and turn drive rod protrusion 918 and ear The lower edge 206 in portion offsets, and lock turns drive rod 903 and be in the quasi- indexing of drive rod to set.

After slot 404 is extracted by ear 201, lock, which turns torsional spring 906, drives lock to turn the O rotations along clockwise direction of bent axle 904, lock Turn drive rod 903 and put back into from the quasi- indexing of drive rod to prohibit indexing to drive rod and set, lock rotating cam 905 drives lock to turn bayonet lock 902 to overcome Lock turns the active force of compression spring 907, and along the profile of lock rotating cam, proximally R is moved lock tumbler wheel 915 to distal end Q, and lock turns bayonet lock 902 It is set from the quasi- indexing of bayonet lock to bayonet lock taboo indexing and sets sliding.

Ear 201 is equipped with the second ear inclined-plane 207, when ear 201 is inserted into slot 404 outside slot 404, ear Second ear inclined-plane 207 compresses lock and turns drive rod inclined-plane 919 and so that lock is turned drive rod 903 and set from drive rod taboo indexing to drive rod Sliding is set in quasi- indexing；The present invention can drive lock to turn drive rod sliding by the way that the second ear inclined-plane is arranged conducive to ear.

Lock turns to be equipped in vessel 909 lock and turns holder 923, and lock turns bent axle 904 and be supported rotatably in lock to turn holder 923 On；

The lock turns bent axle 904 and is equipped with fixed installation disk 924, and the elastic arm which turns torsional spring turns holder 923 mounted on lock On, another elastic arm which turns torsional spring is mounted on fixed installation disk 924；

The lock transcapsidation 901 is across limit and turns between room 406 and slot 404.

In the present embodiment, ear do not have be inserted into slot in, lock turn drive rod be in drive rod taboo indexing set.

In the present embodiment, the first ear inclined-plane of ear is connected between the top edge of ear and the end face of ear,

Second ear inclined-plane of ear is connected between the lower edge of ear and the end face of ear.

The both sides that the lock of this implementation turns bayonet lock protrusion 913 are respectively equipped with that turn the both sides of bayonet lock protrusion 813 identical with limit The lock for coordinating with the flank of tooth of gear 801 turn bayonet lock inclined-plane, it is tapered that lock turns bayonet lock protrusion 913.

The lock of this implementation turns compression spring 907 and is sleeved on lock to turn outside bayonet lock protrusion 913.

The lock rotation mechanism of the present invention realizes control lock using cam mechanism (lock rotating cam and lock the cooperation of tumbler wheel) Turn the sliding of bayonet lock, can turn to be moved to card with respect to effect by gear when bayonet lock prohibits indexable set in bayonet lock to avoid lock occurs The phenomenon that quasi- indexing is set is sold, actually avoids sending out lock and turns bayonet lock and be in bayonet lock to prohibit middle case when indexing is set still rotatably existing As it is not slidable that is, lock, which turns bayonet lock in the case where locking rotating cam and not rotating, can ensure to lock middle case in this way.

The lock rotation mechanism of the present invention turns torsional spring to realize after slot is extracted by ear by lock, and lock turns drive rod from drive rod Quasi- indexing puts back into the quasi- indexing of drive rod and sets, simple in structure, reasonable design, and lock, which can be realized, using less parts turns to drive The reciprocating motion of lever.

The lock rotation mechanism of the present invention turns compression spring by setting lock and lock tumbler wheel is made to remain the wheel of contact lock rotating cam Exterior feature makes lock rotating cam effectively coordinate with lock tumbler wheel.

Lock ear mechanism, limit rotation mechanism, lock rotation mechanism and the ejecting mechanism of the present invention has been independent modular construction, in this way It can be easily installed in the housing, improve production efficiency, reduce production cost.

The creation of the present invention is derived from following imagination and problem：If mask can be assembled with helmet main body when in use, Helmet main body is separated when not in use, then can save many spaces in storage, it might even be possible to will remove ground mask plug Enter in helmet main body, in this way, the practical occupied space of entire motorcycle helmet is equal to the occupied space of helmet main body, saves Space and mask shared by mask and helmet main body assembly relation occupied space.But the mask of existing motorcycle helmet It needs just dismount by specific tool (such as screwdriver).This so that mask dismounting is difficult, time-consuming.To realize above-mentioned set It thinks of and solves the problems, such as that mask dismounting is difficult, created the present invention.

The present invention need to only press the button of the coupling mechanism of both sides, the lock ear of each coupling mechanism respectively when dismantling mask The lock ear bolt protrusion of mechanism exits the recess of ear, and the pop-up pushing block of ejecting mechanism is slided from compression position toward ejected position And ear is pushed while slot is extracted by ear, to lock toward the movement of slot direction is exited and turn drive rod protrusion disengaging ear Lower edge and make lock turn drive rod return to drive rod prohibit indexing set；

The ear of mask both sides is inserted into the slot of a coupling mechanism, when installing mask in ear by the present invention respectively During being inserted into slot, the first ear inclined-plane of ear compresses lock ear bolt inclined-plane and makes lock ear bolt from latched position to pine Open position is slided, and the second ear inclined-plane of ear compresses lock and turns drive rod inclined-plane and so that lock is turned drive rod and set from drive rod taboo indexing Set sliding to the quasi- indexing of drive rod, the end face top pressure outside plate of ear and pushing away makes pop-up pushing block slide into compressed-bit from ejected position It sets, and final, lock ear bolt protrusion is fallen into the recess in ear, and lock turns lower edge phase of the drive rod protrusion with ear It supports, lock turns drive rod and be in the quasi- indexing of drive rod to set, and pops up pushing block and is pushed to compression position.

Claims (1)

1. a kind of limit rotation mechanism, it to be used for motorcycle helmet, which includes helmet main body and mask, helmet main body Both sides are respectively equipped with a coupling mechanism, and the both sides of mask are respectively equipped with an ear, and each ear couples with a coupling mechanism respectively, Each coupling mechanism includes：

Shell comprising inside shell, middle case and outer shell, inside shell and outer shell separate from the both sides of middle case, inside shell It is fixedly mounted in helmet main body, middle case is installed in rotation on the shell of inside, and outer shell is fixedly mounted on middle case, outside The slot plugged for ear is formed between side shell and middle case；

Rotation mechanism is limited, is installed in shell so that middle case just rotates under scheduled outer force effect；

Helmet main body is equipped with installation stud, and inside shell is equipped with positioning convex column, is equipped with centre bore in positioning convex column, on middle case Equipped with turn hole, positioning convex column includes enlarged diameter section and reduced diameter section in ladder shaft-like, the connection of enlarged diameter section and reduced diameter section Place forms convex shoulder；

Middle case is rotationally set in outside the reduced diameter section of positioning convex column through turn hole, and installation stud is inserted into centre bore, a spiral shell Nail be inserted into centre bore and with installation stud screw-thread fit, the end of the head of screw and the reduced diameter section of positioning convex column offset and incite somebody to action Inside shell is fastened in helmet main body, and middle case is limited between the head of screw and convex shoulder；

It is characterized in that,

The limit rotation mechanism includes gear, limit transcapsidation, limit turns bayonet lock, limit turns compression spring and limit turns head part；

The gear is fixedly mounted on the enlarged diameter section of positioning convex column；

The limit transcapsidation is fixedly mounted on middle case, and limit is equipped in the limit transcapsidation and turns sliding slot, which is equipped with turns with limit The limit transcapsidation opening of sliding slot connection；

It includes that limit turns top plate, limit turns screw rod and limit changes hands wheel that the limit, which turns head part, and limit turns top plate and be slippingly installed on limit to turn a cunning In slot, one end that limit turns screw rod is pressed on limit and turns on top plate, and limit turns the other end of screw rod, and to stretch out limit transcapsidation outer and change hands wheel with limit Connect, limit turns screw rod and limit transcapsidation screw-thread fit；

It includes that the limit being connected together turns that bayonet lock is slidably matched portion and limit turns bayonet lock protrusion that the limit, which turns bayonet lock, which turns bayonet lock cunning Dynamic auxiliary section is slidably mounted on limit and turns in sliding slot, which turns bayonet lock protrusion and stretched out in outside limit transcapsidation simultaneously from limit transcapsidation opening Stretch into the tooth socket of gear, the limit turn bayonet lock protrusion jumped into from the tooth socket of the gear currently stretched into when middle case is rotated it is another In the tooth socket of gear；

Limit turns that bayonet lock protrusion is tapered, and the both sides which turns bayonet lock protrusion are respectively equipped with limit and turn bayonet lock inclined-plane；

Limit turns compression spring and is installed on limit to turn in sliding slot, and one end contact limit that limit turns compression spring turns bayonet lock and is slidably matched portion, and limit turns compression spring Other end contact limit turns top plate, and rotation limit changes hands wheel and makees to turn the bayonet lock portion of being slidably matched fortune closer or far from limit to drive limit to turn top plate It is dynamic.