CN106072967A - a shell structure - Google Patents

Abstract

The invention relates to a shell structure, which is used on a motorcycle helmet, the motorcycle helmet comprises a helmet body and a face mask, two sides of the helmet body are respectively provided with a connecting mechanism, two sides of the face mask are respectively provided with an ear part, each ear part is respectively connected with one connecting mechanism, and each connecting mechanism comprises: the helmet comprises a helmet body, a shell, a connecting piece and a connecting piece, wherein the shell comprises an inner shell, a middle shell and an outer shell, the outer shell is respectively arranged on two sides of the middle shell, the inner shell is fixedly arranged on the helmet body, the middle shell is rotatably arranged on the inner shell, and a slot for plugging and unplugging an ear part is formed between the outer shell and the middle shell; the helmet body is provided with a mounting stud, the inner shell is provided with a positioning convex column, a central hole is formed in the positioning convex column, the mounting stud is inserted into the central hole, and a screw is inserted into the central hole and is in threaded fit with the mounting stud. The shell structure of the invention enables the screw to be hidden in the shell, plays the roles of dust prevention and water prevention, and avoids the phenomena of rusting, damage and the like caused by exposure of the screw due to sun and rain.

Description

a shell structure

technical field

The invention relates to a shell structure, in particular to a shell structure used on motorcycle helmets.

Background technique

Motorcyclists must wear a helmet to protect their head. Existing motorcycle helmets generally include a helmet body worn on the head and a transparent mask. The mask is rotatably mounted on the helmet body through hinge mechanisms on both sides, and can be pushed upwards away from the face when the mask is not in use. When the mask needs to be used, it can be pushed down to cover the face. The mask is used to prevent wind, rain, dust and other substances from causing damage to the driver's face and eyes.

When the motorcycle helmet is not in use, it needs to be stored. If it is placed outside, it is easy to be stolen, so it is generally stored in the trunk under the seat cushion. Due to the limited space in the trunk, especially after storing supplies such as raincoats, water bottles, and backpacks, the remaining storage space in the trunk becomes even smaller. And face shield and helmet body cause very large space to be taken up because of the assembly relation of both, are not easy to deposit in the carriage.

In the prior art, the face shield is mounted on the helmet body by screws, and the screws are exposed to the outside, and rust occurs due to exposure to the sun and rain, which reduces the service life and fails to effectively protect the screws.

Contents of the invention

In order to overcome the problem of low service life in the prior art, the embodiment of the present invention provides a shell structure, which is used on a motorcycle helmet. The motorcycle helmet includes a helmet body and a face shield, and a coupling mechanism is respectively provided on both sides of the helmet body , the two sides of the mask are respectively provided with an ear, and each ear is respectively connected with a connecting mechanism, and each connecting mechanism includes: a shell, which includes an inner shell, a middle shell and an outer shell, and the inner shell and the outer shell are separated from the middle shell The inner shell is fixedly mounted on the helmet body, the middle shell is rotatably mounted on the inner shell, the outer shell and the middle shell are fastened together, and there is a plug-in ear hole between the outer shell and the middle shell. Slots; the helmet body is provided with mounting studs, the inner shell is provided with positioning bosses, the positioning bosses are provided with a central hole, the middle shell is provided with turning holes, and the positioning bosses are in the shape of a stepped shaft and include a large diameter section And the small diameter section, the connection between the large diameter section and the small diameter section forms a shoulder; the middle shell is rotatably fitted outside the small diameter section of the positioning boss through the turning hole, the mounting stud is inserted into the center hole, and a screw is inserted into the center The hole is matched with the thread of the mounting stud, the head of the screw is against the end of the small diameter section of the positioning boss to fasten the inner shell on the helmet body, and the middle shell is limited between the head of the screw and the shoulder .

The casing structure of the present invention enables the screws to be hidden in the casing, which has the functions of dustproof and waterproof, and avoids rusting and damage of the exposed screws due to exposure to the sun and rain. Finally, the purpose of improving the service life can be achieved.

Description of drawings

Fig. 1 shows the three-dimensional schematic diagram of motorcycle helmet;

Fig. 2 shows the three-dimensional schematic view after the mask is separated from the helmet main body;

Fig. 3 shows the three-dimensional exploded schematic diagram of motorcycle helmet;

Fig. 4 shows a three-dimensional exploded schematic diagram of another angle of a motorcycle helmet, wherein the helmet main body and the mask are hidden;

Fig. 5 shows a schematic diagram after the ear is pulled out of the slot, where the helmet main body and the outer shell are hidden;

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

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

Fig. 8 shows a partial enlarged view of part C of Fig. 6;

Fig. 9 shows a partial enlarged view of part D of Fig. 6;

Figure 10 shows a partial enlarged view of part E of Figure 6;

Fig. 11 shows a partial enlarged view of part F of Fig. 7;

Figure 12 shows a partial enlarged view of part G of Figure 7;

Fig. 13 shows a schematic diagram after the ear is pulled out of the socket on the basis of Fig. 6;

Fig. 14 shows a schematic diagram after the ear is pulled out of the socket on the basis of Fig. 7;

Figure 15 shows a partially enlarged view of part H of Figure 13;

Fig. 16 shows a partial enlarged view of J portion in Fig. 14;

Fig. 17 shows a partially enlarged view of part K of Fig. 14;

Figure 18 shows a schematic perspective view of the ear locking mechanism;

Fig. 19 shows a schematic perspective view of the lug mechanism after the lug shell is separated;

Fig. 20 shows a three-dimensional exploded schematic view of the ear locking mechanism;

Figure 21 shows a schematic perspective view of the ejection mechanism;

Figure 22 shows a perspective exploded view of the ejection mechanism;

Fig. 23 shows a schematic perspective view of a limited-rotation mechanism;

Fig. 24 shows a three-dimensional exploded schematic view of the limited-rotation mechanism;

Figure 25 shows a schematic perspective view of the locking mechanism;

Fig. 26 shows a schematic perspective view of the lock-rotation mechanism after the lock-rotation housing is separated;

Fig. 27 shows an exploded schematic perspective view of the locking mechanism.

detailed description:

A kind of motorcycle helmet as shown in Fig. 1 to Fig. 27, comprises the helmet body 10 that is used to wear on driver's head and transparent face shield 20, the both sides of helmet body 10 are respectively provided with a coupling mechanism 30, the face shield 20 An ear portion 201 is respectively provided on both sides, and each ear portion 201 is respectively connected with a coupling mechanism 30. In particular, each ear portion 201 is detachably inserted into a coupling mechanism 30 respectively, and each coupling mechanism includes:

As shown in Figures 3 and 4, the housing 40 includes an inner shell 401, a middle shell 402 and an outer shell 403, the inner shell 401 and the outer shell 403 are separated on both sides of the middle shell 402, and the inner shell 401 is fixedly mounted on the helmet On the main body 10, the middle shell 402 is rotatably mounted on the inner shell 401, and the outer shell 403 is fixedly mounted on the middle shell 402. In this embodiment, the outer shell 403 and the middle shell 402 are connected by a buckle structure (not shown in the figure). Out) buckle together, that is, the outer shell 403 and the middle shell 402 are buckled together, so as to facilitate the disassembly of the outer shell, the snap connection structure of this embodiment can adopt the existing snap connection structure, Between 403 and the middle shell 402 is formed a slot 404 that can be plugged in by the ear 201 to realize the connection between the ear 201 and the coupling mechanism 30. In this embodiment, the housing 40 is provided with a notch communicating with the slot 404 405, especially, the notch 405 is arranged between the outer shell 403 and the middle shell 402, the ear 201 is inserted into the slot 404 through the notch 405, and a limited rotation chamber 406 is formed between the inner shell 401 and the middle shell 402; The shell structure of the embodiment is simple, and the rotatable assembly of the middle shell and the outer side is realized, that is, the rotatability of the mask can be realized. When the mask is not needed, it can be pushed up to keep away from the face, and when the mask is needed, it can be pushed down to cover the face. The face; the shell structure of the present invention separates the limited-rotation chamber and the slot independently to avoid collision and friction between the ear and the parts (such as gears) in the first-rotation chamber;

The ear locking mechanism 50 is installed in the housing 40 and is used to lock the ear 201 inserted into the slot 404 to prevent the ear 201 from being pulled out of the slot 404. In particular, the ear locking mechanism 50 is used to lock or release the insertion The ear 201 in the slot 404 prevents or allows the ear 201 to be pulled out of the slot 404; the present invention can prevent the ear inserted into the slot from accidentally breaking away from the slot by setting the ear locking mechanism, that is, avoiding the accidental separation of the mask and the helmet body , to ensure the safety and reliability of use.

The button 60 is installed in the casing 40 and is manually pressed by the driver. The button 60 is connected with the ear locking mechanism 50. When the button 60 is pressed, the ear locking mechanism 50 releases the ear 201 inserted into the slot 404 to allow The ear portion 201 is pulled out of the slot 404; the present invention can facilitate the driver to manually disassemble the mask by setting the button, so that the mask can be disassembled conveniently and quickly; the mask can be disassembled and assembled.

The pop-up mechanism 70 is installed in the housing 40, especially in the slot 404, so that the ears 201 inserted into the slot 404 have a tendency to withdraw from the slot 404, that is, the pop-up mechanism 70 pushes the ears 201 inserted into the slot 404. The ear part 201 moves toward the direction of exiting the slot 404 . In the present invention, by providing an ejection mechanism, when the ear locking mechanism releases the ear, the ejection mechanism actively pushes the ear inserted into the slot to the outside of the slot, so that the driver can easily and quickly pull out the ear.

The limited-rotation mechanism 80 is installed in the housing 40, especially in the limited-rotation chamber 406, so that the middle shell 402 only rotates under the action of a predetermined external force; It rotates under the action of manual thrust), and stops the rotation against the gravity of the mask itself after canceling the predetermined external force, and stays at the position after the rotation.

The locking mechanism 90 is installed in the casing 40, especially in the middle case 402, which allows the middle case 402 to rotate after the ear 201 is inserted into the slot 404, and prevents the middle case after the ear 201 is pulled out of the slot 404. 402 turns. If after the mask is separated from the helmet body, the middle shells (including the outer shells) on both sides of the helmet body rotate relative to each other, causing the slot positions on both sides to be staggered and not parallel. When the mask is to be installed, the ears of the two masks need to be found The position of the slot will cause installation difficulties. In order to solve this technical problem, the present invention sets the locking mechanism so that after the ear is inserted into the slot, the mask and the middle shell (including the outer shell) are allowed to rotate together. After the ear is pulled out of the slot (that is, the mask is separated from the helmet body) rear), the middle shell (including the outer shell) is prohibited from rotating, so that the middle shells (including the outer shell) on both sides of the helmet body can actually only rotate synchronously, and no relative rotation can occur, so as to avoid the slot positions on both sides being staggered and not parallel. Problems with installation difficulties occur.

In this embodiment, the locking and rotating mechanism 90 and the locking ear mechanism 50 are separated on two sides of the slot 404 .

As shown in Figures 3 to 10, the helmet body 10 is provided with mounting studs 101, in particular, the two sides of the helmet body 10 are respectively provided with a mounting stud 101, and each mounting stud 101 is used to install a connecting In the mechanism 30, the inner shell 401 is provided with a positioning boss 407, the positioning boss 407 is provided with a central hole 408, the middle shell 402 is provided with a turning hole 409, and the positioning boss 407 is in the shape of a stepped shaft and includes a large diameter section 410 and A small diameter section 411, a shoulder 412 is formed at the junction of the large diameter section 410 and the small diameter section 411;

The middle shell 402 is rotatably fitted outside the small-diameter section 411 of the positioning boss through the turning hole 409, the mounting stud 101 is inserted into the center hole 408, a screw 413 is inserted into the center hole 408 and threaded with the mounting stud 101, the screw The head 414 abuts against the end 415 of the small diameter section of the positioning boss so that the inner shell 401 is fastened on the helmet body 10, and the middle shell 402 is limited between the head 414 of the screw and the shoulder 412 so that the middle shell 402 is axially positioned and rotated circumferentially, that is to say, the movement of the middle shell 402 along the axial direction of the positioning boss 407 is positioned, and the middle shell 402 can rotate around the small diameter section 411 of the positioning boss, that is, the middle shell 402 rotates around the axis of the positioning boss 407 . The casing structure of the present invention enables the screws to be hidden in the casing, which has the functions of dustproof and waterproof, and avoids rusting and damage of the exposed screws due to exposure to the sun and rain. When you need to disassemble the screws, you only need to open the outer shell.

As shown in Fig. 5, Fig. 7, Fig. 11, Fig. 14, Fig. 16, Fig. 18, Fig. 19 and Fig. 20, the lug mechanism 50 includes a lug shell 501, a lug pin 502, a lug drive rod 503, a lock lug Ear connecting rod 504, lock ear crutch bar 505 and lock ear torsion spring 506;

In this embodiment, the lug shell 501 is composed of two half shells, and it is installed in the middle shell 402 through the first screw 507;

The lug shell 501 is provided with a lug chamber 508, and the lug chamber 508 is provided with a lug fixing shaft 509. The lug shell 501 is provided with a first opening 510 for the lug and a second opening 511 for the lug. Both the first opening 510 of the lock ear and the second opening 511 of the lock ear communicate with the cavity 508 of the lock ear;

The lock ear pin 502 includes a lock ear pin sliding fit portion 512 and a lock ear pin protruding portion 513, the lock ear pin sliding fit portion 512 is slidably installed in the lock ear cavity 508, and the lock The sliding fit part 512 of the ear pin slides under the guidance of the inner wall of the ear shell 501 surrounding the ear cavity 508 , and the protruding part 513 of the ear pin protrudes from the first opening 510 of the ear to the outside of the ear cavity 508 and extend into the slot 404;

The lock ear driving rod 503 includes a lock ear driving rod sliding fit part 514 and a lock ear driving rod protruding part 515 connected together, and the lock ear driving rod sliding fit part 514 is slidably installed in the lock ear receiving chamber 508 , and the sliding fit part 514 of the lock ear driving rod slides under the guidance of the inner wall of the lock ear shell 501 that encloses the lock ear cavity 508, and the protrusion 515 of the lock ear driving rod protrudes from the second opening 511 of the lock ear Outside the lock ear cavity 508, the button 60 is fixedly installed on the protrusion 515 of the lock ear driving rod;

The sliding direction of the lock ear bolt 502 is perpendicular to the sliding direction of the lock ear driving rod 503;

The lock lug lever 505 includes a short arm 516 and a long arm 517 connected together, one end of the short arm 516 is connected to an end of the long arm 517, the other end of the short arm 516 is provided with a lock ear roller 518, and the long arm 517 The other end of the lock ear link 504 is hinged with one end of the lock ear link 504, and the other end of the lock ear link 504 is hinged with the lock ear latch sliding fit part 512;

The junction of the short arm 516 and the long arm 517 is provided with a lock ear through hole 519, and the lock ear turning rod 505 is rotatably set on the lock ear fixing shaft 509 through the lock ear through hole 519;

The lug driving rod sliding fitting part 514 is provided with a lug driving rod inclined surface 520, and the lug roller 518 is pressed against the lug driving rod inclined surface 520 so that the locking lug roller 518 slides along the locking lug driving rod inclined surface 520, and the button is pressed 60 so that the lock ear driving rod 503 drives the lock ear crutch 505 to rotate clockwise around the lock lug fixed shaft 509, and when the button 60 is released, the lock lug torsion spring 506 drives the lock lug crutch 505 around the lock lug fixed shaft 509 Rotate in the counterclockwise direction P to drive the locking lug driving rod 503 to reset;

The lock ear torsion spring 506 is set on the lock ear fixed shaft 509, an elastic arm 521 of the lock ear torsion spring is installed on the lock ear fixed shaft 509, and the other elastic arm 522 of the lock ear torsion spring is installed on the lock ear crutch On the rod 505, in particular, the other elastic arm 522 of the lock ear torsion spring is installed on the long arm 517, and the lock ear torsion spring 506 makes the lock ear crutch bar 505 rotate around the lock ear fixing shaft 509 in the counterclockwise direction P. trend, the lock ear torsion spring 506 acts on the lock ear lever 505 so that the lock ear roller 518 always contacts and presses against the lock ear driving rod slope 520;

When the lock ear lever 505 rotates, it drives the lock ear bolt 502 to switch between a locked position (as shown in Figures 7 and 11) and a released position (as shown in Figures 14 and 16), and the lock ear bolt 502 When in the locked position, the ear locking mechanism 50 locks the ear 201 inserted into the slot 404 to prevent the ear 201 from being pulled out of the slot 404; when the ear locking pin 502 is in the released position, the ear locking mechanism 50 is released and inserted The ear portion 201 in the slot 404 to allow the ear portion 201 to be pulled out of the slot 404;

The ear 201 is provided with a notch 202, and in this embodiment, the notch 202 is located at the upper edge 203 of the ear;

When the lock lug lever 505 rotates in the clockwise direction O around the lock lug fixing shaft 509, the lock lug latch 502 switches from the locked position to the released position;

When the lock lug lever 505 rotates in the counterclockwise direction P around the lock lug fixing shaft 509, the lock lug latch 502 is switched from the released position to the locked position; wherein,

When the lock ear pin 502 is in the locked position, the lock ear pin protrusion 513 extends into the notch 202 of the ear inserted into the slot 404 to prevent the ear 201 from being pulled out of the slot 404;

When the lug pin 502 is in the released position, the lug pin protrusion 513 exits the notch 202 of the ear inserted into the socket 404 to allow the ear 201 to be pulled out of the socket 404 .

In this embodiment, when the ear portion 201 is not inserted into the slot 404 , the locking ear pin 502 is in the locking position.

The lock ear mechanism of the present invention makes the sliding direction of the lock ear bolt and the sliding direction of the lock ear drive rod (ie the pressing direction of the button) perpendicular to each other by setting the lock ear turning lever, so that the button can be arranged on the outer end surface of the housing conveniently. After taking off the motorcycle helmet, since the outer end surface of the housing is all exposed in the driver's line of sight, it is convenient for the driver to find the button. In addition, the lug locking mechanism of the present invention is simple in structure and reasonable in design. Through reasonable selection of the length of the short arm and the length of the long arm, the small stroke movement of the lock lug driving rod can drive the large stroke movement of the lock lug bolt, and the large stroke movement of the lock lug bolt is conducive to stably and reliably locking the lug Part, the small stroke movement of the lock lug driving rod is conducive to the spatial layout design of the entire coupling mechanism, which is convenient to reduce the space occupied by the coupling mechanism, especially the dimension in the thickness direction (ie, the pressing direction of the button) of the coupling mechanism can be reduced.

The lug bolt protruding portion 513 is provided with a lock lug bolt slope 523, and the ear portion 201 is provided with a first ear portion slope 204. When the ear portion 201 is inserted into the slot 404 from the outside of the slot 404, the first ear portion slope 204 presses against the slope 523 of the lock ear pin to make the lock ear pin 502 slide from the locked position to the released position, that is, at this time, the lock ear pin 502 rotates in the clockwise direction O. During this process, the lock ear lever 505 does not drive The lock lug drive rod slides, so that the ear can be inserted more easily, at least in the process of inserting the ear, it does not need to spend the force to drive the button and the lock lug drive rod to slide; the present invention can make the ear part While inserting the slot from the outside of the slot, the lock ear pin is driven to slide from the locked position to the released position, and after the ear is fully inserted into the slot, the lock ear pin protrudes and falls into the notch on the ear; by setting the first ear The inclined surface at the top can facilitate the sliding of the lug pin driven by the ear;

As shown in Figures 3 and 4, the housing 40 includes an inner end face 416, a side face 417 and an outer end face 418 opposite to the inner end face 416, the side face 417 is connected between the inner end face 416 and the outer end face 418, and the inner end face 416 faces the helmet body 10, the outer end surface 418 faces outward, that is, the outer end surface 418 faces away from the helmet body 10, and the button 60 protrudes from the outer end surface 418;

The included angle between the short arm 516 and the long arm 517 is a right angle;

The length of the short arm 516 is less than the length of the long arm 517;

The inner end surface 416 is located on the inner shell 401, the outer end surface 418 is located on the outer shell 403, and the side surface 417 is located on the middle shell. Of course, the side surface 417 can also be composed of the sides of the inner shell 401, the middle shell 402 and the outer shell 403 at the same time.

As shown in Fig. 5, Fig. 6, Fig. 9, Fig. 13, Fig. 15, Fig. 21 and Fig. 22, the eject mechanism 70 includes an eject shell 701, an eject push block 702 and an eject spring 703;

The pop-up shell 701 is also composed of two half-shells, and it is installed in the middle shell 402 through the second screw 704. The pop-up shell 701 is provided with a pop-up cavity 705, and the pop-up shell 701 is provided with a pop-up The pop-up opening 706 communicating with the cavity 705;

The eject push block 702 includes an outer plate 707, an intermediate connecting portion 708 and an inner plate 709, the inner plate 709 is slidably installed in the ejecting cavity 705, one end of the intermediate connecting portion 708 is connected to the inner plate 709, and the intermediate connecting portion 708 The other end of the part 708 extends out of the pop-up cavity 705 through the pop-up opening 706 and connects with the outer plate 707;

The pop-up compression spring 703 is installed in the pop-up cavity 705;

One end of the ejection spring 703 is pressed against the ejection shell 701, and the other end of the ejection spring 703 is pressed against the inner plate 709;

The eject push block 702 slides between a compressed position (as shown in Figure 6 and Figure 9 ) and an eject position (as shown in Figure 13 and Figure 15 ), and the eject spring 703 makes the eject push block 702 have a return to eject The trend of the position, that is, the pop-up pressure spring 703 acts on the pop-up push block 702 to make the pop-up push block 702 move from the compressed position to the pop-up position;

When the ear portion 201 is inserted into the slot 404 from the slot 404, the ear portion 201 presses against the outer plate 707 (especially the end face 205 of the ear portion presses against the outer plate 707) to push the pop-up push block 702 to slide from the pop-up position to the compressed position. Location.

When the pop-up push block 702 is in the compressed position, the outer plate 707 is against the pop-up shell 701;

When the pop-up push block 702 is at the pop-up position, the inner plate 709 is against the pop-up shell; thus, the movement of the pop-up push block 702 is limited by the pop-up shell 701 .

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

As shown in Figure 6, Figure 8, Figure 13, Figure 23 and Figure 24, the rotation limiting mechanism 80 includes a gear 801 located in the rotation limiting chamber 406, a rotation limiting housing 802, a rotation limiting bayonet pin 803, and a rotation limiting compression spring 804 And limit rotation top piece 805;

In this embodiment, the rotation limiting shell 802 is also composed of two half shells, and it is installed in the middle shell 402 through the third screw 806;

The gear 801 is fixedly mounted on the large diameter section 410 of the positioning boss;

The limited-rotation shell 802 is fixedly installed on the middle shell 402 so that the limited-rotation shell 802 follows the rotation of the middle shell 402. The limited-rotation shell 802 is provided with a limited-rotation chute 807, and the limited-rotation shell 802 is provided with a limit-rotation slide. The opening 808 of the limited-rotation casing communicated with the groove 807;

The rotation-limiting top piece 805 includes a rotation-limiting top plate 809, a rotation-limiting screw 810 and a rotation-limiting handwheel 811. The rotation-limiting top plate 809 is slidably installed in the rotation-limiting chute 807, and one end of the rotation-limiting screw 810 presses against the rotation-limiting On the top plate 809, the other end of the rotation-limiting screw 810 extends out of the rotation-limiting housing 802 and connects with the rotation-limiting handwheel 811. The rotation-limiting screw 810 is threadedly matched with the rotation-limiting housing 802, and can be driven by manually driving the rotation-limiting handwheel 811 to rotate. The rotation-limiting top plate 809 slides in the rotation-limiting chute 807;

The rotation-limiting bayonet 803 includes a rotation-limiting bayonet sliding fit portion 812 and a rotation-limiting bayonet protruding portion 813 connected together, and the rotation-limiting bayonet sliding fitting portion 812 is slidably installed in the rotation-limiting bayonet chute 807 , the limited-rotation bayonet protrusion 813 protrudes from the rotation-limiting housing opening 808 outside the rotation-limiting housing 802 and into the tooth groove of the gear 801 , and the rotation-limiting bayonet protrusion 813 moves from the center housing 402 to The tooth groove of the currently protruding gear 801 jumps into the tooth groove of another gear 801;

The two sides of the limited-rotation bayonet protruding part 813 are respectively provided with a limited-rotation bayonet slope 814 for cooperating with the tooth surface of the gear 801. When the middle shell 402 rotates, jump into the tooth groove of another gear 801 from the tooth groove of the gear 801 that is currently inserted;

The limit-rotation pressure spring 804 is installed in the limit-rotation chute 807, one end of the limit-rotation pressure spring 804 pushes against the sliding fit part 812 of the limit-rotation bayonet, and the other end of the limit-rotation pressure spring 804 pushes against the limit-rotation top plate 809, and the rotation limiter hand The wheel 811 drives the rotation-limiting top plate 809 to move closer to or away from the sliding fitting part 812 of the rotation-limiting bayonet to control the compression amount of the rotation-limiting compression spring 804 .

The elastic force of the rotation-limiting compression spring will decrease after being used for a period of time, causing the rotation-limiting mechanism to lose its function, and the mask cannot stay in the expected position under the action of its own gravity. The rotation limiting mechanism of this embodiment can adjust the compression amount of the rotation limiting compression spring by setting the rotation limiting top piece to adjust the elastic force of the rotation limiting compression spring, so that the rotation limiting mechanism can work reliably and maintain the function of the rotation limiting mechanism all the time.

As shown in Figure 5, Figure 7, Figure 12, Figure 14, Figure 17, Figure 25, Figure 26 and Figure 27, the lock rotation mechanism 90 includes a lock rotation housing 901, a lock rotation bayonet 902, and a lock rotation driving rod 903 , lock rotation crankshaft 904, lock rotation cam 905, lock rotation torsion spring 906, lock rotation pressure spring 907 and lock rotation connecting rod 900;

In this embodiment, the lock rotary housing 901 is also composed of two half housings, and it is installed in the middle housing 402 through the fourth screw 908;

The lock rotation housing 901 is provided with a lock rotation accommodation cavity 909, the lock rotation housing 901 is provided with a lock rotation first opening 910 and a lock rotation second opening 911, the lock rotation first opening 910 and the lock rotation second opening 911 All communicate with the lock-rotating cavity 909;

The lock-twist bayonet 902 includes a lock-twist bayonet sliding fit portion 912 and a lock-twist bayonet protruding portion 913 connected together, and the lock-twist bayonet sliding fit portion 912 is slidably installed in the lock-twist bayonet cavity 909 , and the sliding fitting part 912 of the lock rotation bayonet slides under the guidance of the inner wall of the lock rotation housing 901 surrounding the lock rotation volume chamber 909, and the lock rotation bayonet protruding part 913 protrudes from the lock rotation first opening 910 in The lock-rotation chamber 909 extends into the limited-rotation chamber 406. The lock-rotation bayonet sliding fit part 912 is provided with a lock-rotation wheel frame 914, and the lock-rotation wheel frame 914 is equipped with a lock-rotation roller 915;

The locking rotation driving rod 903 includes a locking rotation driving rod sliding fit part 916 and a locking rotation driving rod protruding part 917 connected together, and the locking rotation driving rod sliding fitting part 916 is slidably installed in the locking rotation rotating cavity 909 , and the sliding fitting part 916 of the lock-rotation driving rod slides under the guidance of the inner wall of the lock-rotation housing 901 enclosing the lock-rotation chamber 909, and the lock-rotation driving rod protruding part 918 protrudes from the second opening 911 of the lock-rotation Out of the lock-rotation chamber 909 and extending into the slot 404, the lock-rotation driving rod protrusion 918 is provided with a lock-rotation driving rod slope 919;

The sliding direction of the locking pin 902 is parallel to the sliding direction of the locking driving rod 903;

The lock-rotation crankshaft 904 is rotatably installed in the lock-rotation crankshaft 909, and the lock-rotation cam 905 is fixedly mounted on the lock-rotation crankshaft 904, so that the lock-rotation cam 905 follows the lock-rotation crankshaft 904 around the axis of the lock-rotation crankshaft 904 center rotation, the lock-rotation crankshaft 904 is provided with a connecting rod journal 920, in particular, the lock-rotation crankshaft 904 is provided with a radially offset connecting rod journal 920, and one end of the lock-rotation connecting rod 900 is hinged on the connecting rod journal 920, the other end of the lock-rotation connecting rod 900 is hinged on the sliding fit part 916 of the lock-rotation drive rod;

The profile of the locking cam 905 has a far end Q and a proximal end R. The distance between the far end Q and the center of rotation of the locking cam 905 (i.e. the axis of the locking crankshaft 904) is N, and the near end R is far from the locking cam. The distance of the rotation center of 905 is M, wherein, N>M;

The lock rotation compression spring 907 is installed in the lock rotation volume chamber 909, one end of the lock rotation compression spring 907 abuts the lock rotation casing 901, and the other end of the lock rotation compression spring 907 abuts the lock rotation bayonet sliding fit part 912, The lock rotation compression spring 907 keeps the lock rotation roller 915 of the lock rotation bayonet in contact with the profile of the lock rotation cam 905;

The lock torsion spring 906 is sleeved on the lock torsion crankshaft 904, an elastic arm of the lock torsion spring is installed on the lock torsion housing 901, and the other elastic arm of the lock torsion spring is installed on the lock torsion crankshaft 904. The torsion spring 906 makes the locking crankshaft 904 have a tendency to rotate in the clockwise direction O;

When the locking pin 902 slides, it switches between a bayonet lockout position (as shown in Figures 14 and 17 ) and a bayonet quasi-rotation position (as shown in Figures 7 and 12 );

When the lock lock pin 902 is in the locked pin rotation prohibited position, the lock lock roller 915 is in contact with the distal end Q on the profile of the lock lock cam 905, and the lock lock lock pin protruding part 913 extends into the tooth groove of the gear 801 to prevent The middle shell 402 rotates;

When the locking pin 902 is in the quasi-rotating position of the locking pin, the locking roller 915 contacts the proximal end R on the profile of the locking cam 905, and the locking pin protrusion 913 withdraws from the tooth groove of the gear 801 to allow the intermediate housing to 402 turn;

When the lock-rotation driving rod 903 slides, it switches between a non-rotating position of the driving rod (as shown in Figures 14 and 17) and a quasi-rotating position of the driving rod (as shown in Figures 7 and 12);

When the lock-rotation driving rod 903 is in the position of the drive rod, the locking pin 902 is in the position of the lock-pin rotation prohibition;

When the lock-rotation driving rod 903 is in the quasi-rotation position of the drive rod, the lock-rotation bayonet 902 is in the bayonet quasi-rotation position;

When the lock-rotation drive rod 903 slides from the drive rod prohibited rotation position to the drive rod quasi-rotation position, the lock-rotation drive rod 903 drives the lock-rotation crankshaft 904 to rotate in the counterclockwise direction P, and the lock-rotation roller 915 moves along the contour of the lock-rotation cam 905 The end Q moves to the proximal end R, and the locking pin 902 slides from the detent rotation prohibited position to the bayonet quasi-rotation position;

When the lock-rotation drive rod 903 slides from the quasi-rotation position of the drive rod to the prohibited-rotation position of the drive rod, the lock-rotation drive rod 903 drives the lock-rotation crankshaft 904 to rotate in the clockwise direction O, and the lock-rotation roller 915 moves along the contour of the lock-rotation cam 905 from close to The end R moves to the far end Q, and the locking pin 902 slides from the detent quasi-rotation position to the detent rotation prohibition position;

When the ear part 201 is inserted into the slot 404 from the slot 404, the ear part 201 presses against the inclined surface 919 of the lock-rotation drive rod to make the lock-rotation drive rod 903 slide from the drive rod non-rotation position to the drive rod quasi-rotation position, and finally locks The protruding part 918 of the rotating driving rod is against the lower edge 206 of the ear, and the locking rotating driving rod 903 is in the quasi-rotating position of the driving rod.

After the ear portion 201 is pulled out of the slot 404, the lock-rotation torsion spring 906 drives the lock-rotation crankshaft 904 to rotate in the clockwise direction O, the lock-rotation drive lever 903 returns from the quasi-rotation position of the drive lever to the prohibited rotation position of the drive lever, and the lock-rotation cam 905 drives the locking pin 902 to overcome the active force of the locking spring 907, the locking roller 915 moves from the near end R to the far end Q along the profile of the locking cam, and the locking pin 902 moves from the quasi-rotating position of the locking pin to the locking pin. The pin slides in the locked position.

The ear 201 is provided with a second ear slope 207. When the ear 201 is inserted into the slot 404 from the outside of the slot 404, the second ear slope 207 of the ear presses against the lock driving rod slope 919 to drive the lock. The rod 903 slides from the non-rotating position of the driving rod to the quasi-rotating position of the driving rod; in the present invention, by setting the inclined surface of the second ear part, the ear part can facilitate the sliding of the lock-rotation driving rod.

A lock-rotation bracket 923 is provided in the lock-rotation chamber 909, and the lock-rotation crankshaft 904 is rotatably supported on the lock-rotation bracket 923;

The lock rotation crankshaft 904 is provided with a fixed mounting plate 924, one elastic arm of the lock rotation torsion spring is installed on the lock rotation bracket 923, and the other elastic arm of the lock rotation torsion spring is installed on the fixed installation plate 924;

The lock rotation housing 901 straddles between the rotation limiting chamber 406 and the slot 404 .

In this embodiment, when the ear is not inserted into the slot, the lock-rotation driving rod is in the non-rotating position of the driving rod.

In this embodiment, the first ear slope of the ear is connected between the upper edge of the ear and the end surface of the ear,

The second ear slope of the ear is connected between the lower edge of the ear and the end surface of the ear.

The two sides of the locking pin protrusion 913 in this embodiment are respectively provided with the same locking pin slopes as the two sides of the limited rotation bayonet protrusion 813 for cooperating with the tooth surface of the gear 801, and the locking lock The pin protrusion 913 is tapered.

In this embodiment, the lock rotation compression spring 907 is sleeved outside the lock rotation bayonet protrusion 913 .

The lock-rotation mechanism of the present invention adopts a cam mechanism (that is, the cooperation of the lock-rotation cam and the lock-rotation roller) to realize the control of the sliding of the lock-rotation bayonet, which can avoid the relative action of the gear when the lock-rotation bayonet is in the bayonet-locked position The phenomenon of moving to the quasi-rotation position of the bayonet pin is actually to avoid the phenomenon that the middle shell can still rotate when the lock-rotation bayonet is in the bayonet-locked position, that is, the lock-rotation bayonet is in the situation that the lock-rotation cam does not rotate. Non-slidable, this ensures locking of the middle case.

The lock-rotation mechanism of the present invention uses the lock-rotation torsion spring to realize that after the ear is pulled out of the slot, the lock-rotation drive rod returns from the quasi-rotation position of the drive rod to the quasi-rotation position of the drive rod. The reciprocating movement of the lock-rotation drive rod can be realized by using the spare parts.

The lock-rotation mechanism of the present invention makes the lock-rotation roller always keep in contact with the contour of the lock-rotation cam by setting the lock-rotation pressure spring, so that the lock-rotation cam and the lock-rotation roller can cooperate effectively.

The ear locking mechanism, the rotation limiting mechanism, the locking rotation mechanism and the pop-up mechanism of the present invention are all independent modular structures, which can be easily installed in the housing, improve production efficiency and reduce production costs.

The creation of the present invention stems from the following assumptions and problems: if the face shield can be assembled with the helmet body when in use, and the helmet body can be detached when not in use, then a lot of space can be saved when storing, and even the removed face shield can be inserted into the In the helmet body, like this, the actual occupied space of the whole motorcycle helmet is equal to the space taken by the helmet body, which saves the space occupied by the mask and the space taken by the assembly relationship between the mask and the helmet body. But the face shields of existing motorcycle helmets need to be disassembled by means of specific tools (such as screwdrivers). This makes disassembly and assembly of the mask difficult and time-consuming. In order to realize the above assumption and solve the difficult problem of mask dismounting, the present invention has been created.

When the mask is disassembled in the present invention, only the buttons of the coupling mechanisms on both sides need only be pressed, and the lug latch protrusions of the ear locking mechanisms of each coupling mechanism withdraw from the notches of the ears, and the pop-up push block of the pop-up mechanism goes from the compressed position to The pop-up position slides and pushes the ear to move out of the slot. When the ear is pulled out of the slot, the protrusion of the lock-rotation drive rod breaks away from the lower edge of the ear, so that the lock-rotation drive rod returns to the non-rotation position of the drive rod. ;

When the mask is installed in the present invention, the ears on both sides of the mask are respectively inserted into the slots of a coupling mechanism. During the process of inserting the ears into the slots, the slope of the first ear of the ear presses against the slope of the lock ear pin so that The lock lug pin slides from the locked position to the released position, and the second ear slope of the ear presses against the slope of the lock-rotation drive rod to make the lock-rotation drive rod slide from the non-rotation position of the drive rod to the normal rotation position of the drive rod. The end face pushes against the outer plate to push the pop-up push block from the pop-up position to the compressed position, and finally, the locking lug pin protrudes and falls into the notch on the ear, and the protrusion of the lock-rotation driving rod is against the lower edge of the ear. The lock-rotation drive rod is in the quasi-rotation position of the drive rod, and the pop-up push block is pushed to the compression position.

Claims (7)

1. The utility model provides a shell structure for on the motorcycle helmet, this motorcycle helmet includes helmet body and face guard, and helmet body's both sides are equipped with a coupling mechanism respectively, and the both sides of face guard are equipped with an ear respectively, and every ear is respectively with a coupling mechanism hookup, and its characterized in that, each coupling mechanism includes: the helmet comprises a helmet body, a shell, a connecting piece and a connecting piece, wherein the shell comprises an inner shell, a middle shell and an outer shell, the inner shell and the outer shell are respectively arranged on two sides of the middle shell, the inner shell is fixedly arranged on the helmet body, the middle shell is rotatably arranged on the inner shell, the outer shell and the middle shell are buckled together, and a slot for inserting and pulling an ear part is formed between the outer shell and the middle shell;

the helmet body is provided with a mounting stud, the inner shell is provided with a positioning convex column, a central hole is formed in the positioning convex column, the middle shell is provided with a rotating hole, the positioning convex column is in a stepped shaft shape and comprises a large-diameter section and a small-diameter section, and a convex shoulder is formed at the joint of the large-diameter section and the small-diameter section;

the middle shell is rotatably sleeved outside the small-diameter section of the positioning convex column through the rotating hole, the mounting stud is inserted into the central hole, a screw is inserted into the central hole and is in threaded fit with the mounting stud, the head of the screw abuts against the end part of the small-diameter section of the positioning convex column to fasten the inner shell on the helmet body, and the middle shell is limited between the head of the screw and the convex shoulder.

2. A shell structure according to claim 1, wherein:

each coupling mechanism further comprises:

the lug locking mechanism is arranged in the shell and used for locking the lug part inserted into the slot so as to prevent the lug part from being pulled out of the slot;

a button installed in the housing for a driver to manually press, the button being coupled with the lug locking mechanism, the lug locking mechanism releasing the lug inserted into the slot to allow the lug to be pulled out of the slot when the button is pressed;

the ejection mechanism is arranged in the shell, so that the ear part inserted into the slot has a tendency of exiting the slot;

the rotation limiting mechanism is arranged in the shell, so that the middle shell can rotate under the action of a preset external force;

and the rotation locking mechanism is arranged in the shell, allows the middle shell to rotate after the lug parts are inserted into the slots, and prevents the middle shell from rotating after the lug parts are pulled out of the slots.

3. A shell structure according to claim 2, wherein:

the lock lug mechanism comprises a lock lug shell, a lock lug bolt, a lock lug driving rod, a lock lug connecting rod, a lock lug turning rod and a lock lug torsion spring;

a lock lug accommodating cavity is formed in the lock lug shell, a lock lug fixing shaft is arranged in the lock lug accommodating cavity, a lock lug first opening and a lock lug second opening are formed in the lock lug shell, and the lock lug first opening and the lock lug second opening are communicated with the lock lug accommodating cavity;

the lock lug bolt comprises a lock lug bolt sliding fit part and a lock lug bolt protruding part which are connected together, the lock lug bolt sliding fit part is slidably arranged in the lock lug cavity, and the lock lug bolt protruding part extends out of the lock lug cavity from a first opening of the lock lug and extends into the slot;

the lock lug driving rod comprises a lock lug driving rod sliding fit part and a lock lug driving rod protruding part which are connected together, the lock lug driving rod sliding fit part is slidably arranged in the lock lug accommodating cavity, the lock lug driving rod protruding part extends out of the lock lug accommodating cavity from a second opening of the lock lug, and the button is fixedly arranged on the lock lug driving rod protruding part;

the sliding direction of the lock lug bolt is vertical to that of the lock lug driving rod;

the lock lug connecting lever comprises a short arm and a long arm which are connected together, one end of the short arm is connected with one end of the long arm, the other end of the short arm is provided with a lock lug roller, the other end of the long arm is hinged with one end of a lock lug connecting rod, and the other end of the lock lug connecting rod is hinged with a lock lug bolt sliding matching part;

a lock lug through hole is arranged at the joint of the short arm and the long arm, and the lock lug connecting lever is rotatably sleeved on the lock lug fixing shaft through the lock lug through hole;

the lock lug driving rod sliding matching part is provided with a lock lug driving rod inclined plane, the lock lug roller is pressed against the lock lug driving rod inclined plane so as to enable the lock lug roller to slide along the lock lug driving rod inclined plane, and the button is pressed so that the lock lug driving rod drives the lock lug connecting rod to rotate around the lock lug fixing shaft in the clockwise direction;

the lock lug torsion spring is sleeved on the lock lug fixing shaft, one elastic arm of the lock lug torsion spring is arranged on the lock lug fixing shaft, the other elastic arm of the lock lug torsion spring is arranged on the lock lug connecting lever, and the lock lug torsion spring enables the lock lug connecting lever to have a tendency of rotating around the lock lug fixing shaft in the anticlockwise direction;

when the lock lug crank rod rotates, the lock lug bolt is driven to switch between a locking position and a releasing position;

notches are arranged on the ear parts;

when the lock lug crank rod rotates around the lock lug fixing shaft in the clockwise direction, the lock lug bolt is switched from the locking position to the releasing position;

when the lock lug crank rod rotates around the lock lug fixing shaft along the anticlockwise direction, the lock lug bolt is switched from the loosening position to the locking position; wherein,

when the lock lug bolt is in a locking position, the convex part of the lock lug bolt extends into the notch of the lug part inserted into the slot;

when the lug bolt is in the release position, the lug bolt projection exits the notch of the lug inserted into the slot.

4. A shell structure as claimed in claim 3, wherein:

the lug bolt protruding part is provided with a lug bolt inclined plane, the lug part is provided with a first lug part inclined plane, when the lug part is inserted into the slot from the outside of the slot, the first lug part inclined plane is pressed against the lug bolt inclined plane to enable the lug bolt to slide from a locking position to a loosening position;

the shell comprises an inner end face, a side face and an outer end face opposite to the inner end face, the side face is connected between the inner end face and the outer end face, the inner end face faces the helmet body, and the button protrudes out of the outer end face;

the included angle between the short arm and the long arm is a right angle;

the length of the short arm is less than that of the long arm;

the inner end surface is positioned on the inner shell, and the outer end surface is positioned on the outer shell.

5. A shell structure according to claim 4, wherein:

the slot is internally provided with a pop-up mechanism which enables the ear part inserted into the slot to have the tendency of exiting the slot;

the ejection mechanism comprises an ejection shell, an ejection push block and an ejection pressure spring;

the pop-up shell is internally provided with a pop-up cavity, and the pop-up shell is provided with a pop-up opening communicated with the pop-up cavity;

the pop-up push block comprises an outer plate, a middle connecting part and an inner plate, the inner plate is slidably arranged in the pop-up containing cavity, one end of the middle connecting part is connected with the inner plate, and the other end of the middle connecting part extends out of the pop-up containing cavity through the pop-up opening and is connected with the outer plate;

one end of the spring is propped against the spring shell, and the other end of the spring is propped against the inner plate;

the ejection push block slides between a compression position and an ejection position, and the ejection pressure spring is ejected to enable the ejection push block to have the tendency of returning to the ejection position;

when the ear part is inserted into the slot from the outside of the slot, the ear part presses the outer plate to push the ejecting push block to slide from the ejecting position to the compression position.

6. A shell structure according to claim 5, wherein:

the rotation limiting mechanism comprises a gear, a rotation limiting shell, a rotation limiting clamping pin, a rotation limiting pressure spring and a rotation limiting jacking piece;

the gear is fixedly arranged on the large-diameter section of the positioning convex column;

the rotation limiting shell is fixedly arranged on the middle shell, a rotation limiting chute is arranged in the rotation limiting shell, and a rotation limiting shell opening communicated with the rotation limiting chute is arranged on the rotation limiting shell;

the rotation limiting jacking piece comprises a rotation limiting top plate, a rotation limiting screw rod and a rotation limiting hand wheel, wherein the rotation limiting top plate is slidably arranged in a rotation limiting chute, one end of the rotation limiting screw rod is pressed against the rotation limiting top plate, the other end of the rotation limiting screw rod extends out of the rotation limiting shell and is connected with the rotation limiting hand wheel, and the rotation limiting screw rod is in threaded fit with the rotation limiting shell;

the rotation limiting bayonet lock comprises a rotation limiting bayonet lock sliding fit part and a rotation limiting bayonet lock bulge which are connected together, the rotation limiting bayonet lock sliding fit part is slidably arranged in the rotation limiting sliding groove, the rotation limiting bayonet lock bulge extends out of the rotation limiting shell from an opening of the rotation limiting shell and extends into a gear tooth groove of the gear, and the rotation limiting bayonet lock bulge jumps into the gear tooth groove of the other gear from the gear tooth groove of the currently extending gear when the middle shell rotates;

the two sides of the protruding part of the rotation limiting bayonet lock are respectively provided with a rotation limiting bayonet lock inclined plane;

the rotation limiting pressure spring is arranged in the rotation limiting sliding groove, one end of the rotation limiting pressure spring abuts against the rotation limiting clamping pin sliding fit portion, the other end of the rotation limiting pressure spring abuts against the rotation limiting top plate, and the rotation limiting hand wheel is rotated to drive the rotation limiting top plate to move close to or far away from the rotation limiting clamping pin sliding fit portion.

7. A shell structure according to claim 6, wherein:

a rotation limiting chamber is formed between the inner shell and the middle shell;

the lock rotation mechanism comprises a lock rotation shell, a lock rotation bayonet lock, a lock rotation driving rod, a lock rotation crankshaft, a lock rotation cam, a lock rotation torsion spring, a lock rotation compression spring and a lock rotation connecting rod;

a lock rotation accommodating cavity is arranged in the lock rotation shell, a lock rotation first opening and a lock rotation second opening are arranged on the lock rotation shell, and the lock rotation first opening and the lock rotation second opening are both communicated with the lock rotation accommodating cavity;

the locking rotating bayonet lock comprises a locking rotating bayonet lock sliding fit part and a locking rotating bayonet lock protruding part which are connected together, the locking rotating bayonet lock sliding fit part is slidably arranged in the locking rotating cavity, the locking rotating bayonet lock protruding part extends out of the locking rotating cavity from a locking rotating first opening and extends into the rotation limiting chamber, a locking rotating wheel frame is arranged on the locking rotating bayonet lock sliding fit part, and a locking rotating roller is arranged on the locking rotating wheel frame;

the lock rotation driving rod comprises a lock rotation driving rod sliding matching part and a lock rotation driving rod protruding part which are connected together, the lock rotation driving rod sliding matching part is slidably arranged in the lock rotation containing cavity, the lock rotation driving rod protruding part extends out of the lock rotation containing cavity from the lock rotation second opening and extends into the slot, and a lock rotation driving rod inclined surface is arranged on the lock rotation driving rod protruding part;

the sliding direction of the locking and rotating bayonet lock is parallel to that of the locking and rotating driving rod;

the lock rotation crankshaft is rotatably arranged in the lock rotation accommodating cavity, the lock rotation cam is fixedly arranged on the lock rotation crankshaft, the lock rotation crankshaft is provided with a radially offset connecting rod journal, one end of the lock rotation connecting rod is hinged on the connecting rod journal, and the other end of the lock rotation connecting rod is hinged on the slide matching part of the lock rotation driving rod;

the profile of the lock rotating cam is provided with a far end and a near end, the distance from the far end to the rotating center of the lock rotating cam is N, the distance from the near end to the rotating center of the lock rotating cam is M, wherein N is larger than M;

the locking rotating pressure spring is arranged in the locking rotating cavity, one end of the locking rotating pressure spring abuts against the locking rotating shell, the other end of the locking rotating pressure spring abuts against the sliding matching part of the locking rotating bayonet lock, and the locking rotating pressure spring enables a locking rotating roller of the locking rotating bayonet lock to keep contact with the outline of the locking rotating cam;

the lock rotating torsion spring is sleeved on the lock rotating crankshaft, one elastic arm of the lock rotating torsion spring is arranged on the lock rotating shell, the other elastic arm of the lock rotating torsion spring is arranged on the lock rotating crankshaft, and the lock rotating torsion spring enables the lock rotating crankshaft to have a tendency of rotating in the clockwise direction;

when the locking and rotating bayonet lock slides, the locking and rotating bayonet lock is switched between a bayonet lock rotation prohibiting position and a bayonet lock rotation aligning position;

when the locking rotary bayonet lock is positioned at the bayonet lock rotation prohibiting position, the locking rotary roller is contacted with the far end on the outline of the locking rotary cam, and the convex part of the locking rotary bayonet lock extends into the gear tooth groove;

when the locking rotating bayonet lock is in the bayonet lock quasi-rotating position, the locking rotating roller is contacted with the near end on the outline of the locking rotating cam, and the convex part of the locking rotating bayonet lock exits from the gear tooth groove;

when the lock rotation driving rod slides, the lock rotation driving rod is switched between a driving rod rotation forbidding position and a driving rod rotation aligning position;

when the locking driving rod is at the rotation prohibiting position of the driving rod, the locking rotary bayonet is at the rotation prohibiting position of the bayonet;

when the locking driving rod is positioned at the driving rod quasi-rotation position, the locking rotating bayonet is positioned at the bayonet quasi-rotation position;

when the locking driving rod slides from the driving rod forbidden position to the driving rod quasi-position, the locking driving rod drives the locking crankshaft to rotate along the anticlockwise direction, the locking roller moves from the far end to the near end along the profile of the locking cam, and the locking bayonet lock slides from the bayonet lock forbidden position to the bayonet lock quasi-position;

when the lock rotation driving rod slides from the driving rod quasi-rotation position to the driving rod forbidden rotation position, the lock rotation driving rod drives the lock rotation crankshaft to rotate clockwise, the lock rotation roller moves from the near end to the far end along the profile of the lock rotation cam, and the lock rotation bayonet lock slides from the bayonet lock quasi-rotation position to the bayonet lock forbidden rotation position;

when the ear part is inserted into the slot from the outside of the slot, the ear part presses the inclined surface of the locking driving rod to enable the locking driving rod to slide from the driving rod forbidden position to the driving rod quasi-position.