阅读说明：本技术 一种多功能的智能刀 (Multifunctional intelligent knife ) 是由 黄小穹 于 2021-01-14 设计创作，主要内容包括：本发明公开的一种多功能的智能刀,本发明包括机体,所述机体开口向左的切刀空间,所述切刀空间下侧设有传动空间,所述传动空间下侧设有开口向左的钻刀空间,所述传动空间右侧设有换动空间,所述换动空间右侧设有移动空间,所述移动空间上侧设有带轮空间,设备中设有变速装置可以根据使用者的需求来控制切割的速度,不用人工的手切,大大节省了人的工作量,控制装置可以根据不同的用途控制跟换不同的刀。(The invention discloses a multifunctional intelligent knife which comprises a knife body, wherein a left-opening knife space is formed in the knife body, a transmission space is arranged on the lower side of the knife space, a left-opening drill knife space is arranged on the lower side of the transmission space, a shifting space is arranged on the right side of the transmission space, a moving space is arranged on the right side of the shifting space, a belt wheel space is arranged on the upper side of the moving space, a speed changing device is arranged in the device, the cutting speed can be controlled according to the requirements of a user, manual hand-cutting is not needed, the workload of the user is greatly saved, and a control device can control different knives to be switched according to different purposes.)

1. The utility model provides a multi-functional intelligent sword, includes the organism, its characterized in that: the cutting machine is characterized in that the cutting machine is provided with a cutting space with a left opening, a transmission space is arranged on the lower side of the cutting space, a drilling tool space with a left opening is arranged on the lower side of the transmission space, a changing space is arranged on the right side of the transmission space, a moving space is arranged on the right side of the changing space, a belt wheel space is arranged on the upper side of the moving space, a reciprocating space with an upward opening is arranged on the upper side of the changing space, a speed change device for cutting fast and slow is arranged among the reciprocating space, the speed change device comprises a slide rail fixedly arranged in the reciprocating space, a manual rack is connected on the slide rail in a sliding manner, a rebound spring is connected between the manual rack and the right wall of the reciprocating space, the rear wall of the reciprocating space is rotatably connected with a rotating gear plate shaft, and the front side and the rear side of, the right wall of the reciprocating space is rotatably connected with a movable roller shaft, the movable roller shaft extends rightwards to penetrate through the right wall of the reciprocating space and enters the changing space, the left side and the right side of the movable roller shaft are fixedly connected with a rotary main bevel gear and a movable roller, the rotary main bevel gear is meshed with a rotary auxiliary bevel gear, a sliding block is slidably connected in the movable roller, a friction ring is slidably connected in the sliding block, the left wall of the changing space is fixedly connected with a rotary motor, the right side face of the rotary motor is in power connection with a right motor shaft which is rotatably connected with the left wall and the right wall of the changing space, an upper friction cylinder is fixedly connected on the right motor shaft, the left wall and the right wall of the changing space are rotatably connected with a transmission shaft, the transmission shaft extends leftwards to penetrate through the left wall of the changing space and enters the transmission space, a rotary main belt pulley is fixedly, The hand-held electric tool comprises a lower friction cylinder, wherein the friction ring is in friction fit with the upper friction cylinder, the right wall of the transmission space is rotatably connected with a friction cylinder shaft, the left side and the right side of the friction cylinder shaft are fixedly connected with a friction cylinder and a revolute auxiliary belt wheel, a transmission belt is connected between the revolute auxiliary belt wheel and the revolute main belt wheel, a control device for controlling a tool to stretch out is arranged between the moving space and the belt wheel space, a cutter device for cutting is arranged in the cutter space, a drill tool device for drilling a hard shell is arranged in the drill tool space, and a protection device for protecting a person from being scratched by the tool is arranged in the machine body.

2. The multifunctional smart knife of claim 1, wherein: the control device comprises a source motor fixedly arranged on the top wall of the moving space, the bottom surface of the source motor is in power connection with a shaft with keys which is rotationally connected with the upper wall and the lower wall of the moving space, the shaft with keys is fixedly connected with a key, a large abutting cam is connected with the shaft with keys in a sliding way, a pulling block is rotationally connected with the large abutting cam, a compression spring is connected between the large abutting cam and the bottom wall of the moving space, the top surface of the source motor is in power connection with an upper motor shaft which is rotationally connected with the bottom wall of the belt wheel space, a transmission main belt wheel is fixedly connected with the upper motor shaft, the bottom wall of the belt wheel space is rotationally connected with a through shaft, the through shaft extends downwards to penetrate through the bottom wall of the belt wheel space to enter the moving space, a transmission auxiliary belt wheel and a half gear are fixedly connected with the upper side and the lower side of the through shaft, and, the upper wall and the lower wall of the moving space are rotatably connected with a pulling belt drum shaft, the upper side and the lower side of the pulling belt drum shaft are fixedly connected with an engaging gear and a pulling belt drum, the engaging gear can be engaged with the half gear, the left wall of the moving space is slidably connected with an upper butt rod and a lower butt rod, the upper butt rod and the left wall of the moving space are connected with a strong spring, the lower butt rod and a return spring are connected between the left walls of the moving space, the upper butt rod extends leftwards to penetrate through the left wall of the moving space to enter the cutter space, and the lower butt rod extends leftwards to penetrate through the left wall of the moving space to enter the drill cutter space.

3. The multifunctional smart knife of claim 1, wherein: the cutter device comprises a cutter changing box fixed on the upper abutting rod, a cutter changing space with a left opening is arranged in the cutter changing box, a transferring space with a downward opening is arranged on the right side of the cutter changing space, thin slide rails are symmetrically and fixedly connected with the cutter changing space up and down, a moving slide block is connected in the two thin slide rails in a sliding manner, a miniature spring is connected between the moving slide block and the right wall of the cutter changing space, a driving shaft is connected in the moving slide block in a rotating manner, a cutter, a pulling belt block and a transferring auxiliary bevel gear are fixedly connected on the upper side and the lower side of the driving shaft, a reciprocating belt drum shaft is connected on the top wall of the transferring space in a rotating manner, a reciprocating belt drum and a telescopic mechanism are fixedly connected on the reciprocating belt drum shaft, the telescopic mechanism can enable the lower side of the reciprocating belt drum shaft to stretch, a pulling belt is connected between the reciprocating belt drum and the pulling belt block, and the lower side, the left side face of the rotating motor is in power connection with a step-by-step main bevel gear which is in rotating connection with the right wall of the cutter space, and the step-by-step main bevel gear can be meshed with the step-by-step auxiliary bevel gear.

4. The multifunctional smart knife of claim 1, wherein: the drill bit device comprises a drill bit which is rotatably arranged on the left side of the lower abutting rod, a friction wheel is fixedly connected onto the drill bit, an engaging mechanism is arranged in the space of the drill bit, and the engaging mechanism can ascend to be in friction fit with the friction cylinder and the friction wheel.

5. The multifunctional smart knife of claim 1, wherein: the protection device comprises an upper magnet and a lower magnet which are symmetrically and fixedly arranged on the machine body, the upper magnet and the lower magnet which are symmetrically and fixedly connected with the shell in the protective shell are respectively attracted with the upper magnet and the lower magnet, and a battery is arranged in the machine body.

Technical Field

The invention relates to the field of power driving, in particular to a multifunctional intelligent knife.

Background

In the original society, ancient people use stones, clams and animal bones to make knives of various shapes, the stone knives made of stone materials are firm and smooth and are also good chopping tools, but some knives cut non-broken beef tendons and some coconut shells cannot be opened, so that a plurality of knives are prepared.

Disclosure of Invention

In order to solve the problems, the multifunctional intelligent knife comprises a knife body, a left cutter space is arranged on the knife body, a transmission space is arranged on the lower side of the cutter space, a left drill space is arranged on the lower side of the transmission space, a shifting space is arranged on the right side of the transmission space, a moving space is arranged on the right side of the shifting space, a belt wheel space is arranged on the upper side of the moving space, a reciprocating space with an upward opening is arranged on the upper side of the shifting space, a speed change device for increasing and decreasing the cutting speed is arranged among the reciprocating space, the speed change device comprises a slide rail fixedly arranged in the reciprocating space, a manual rack is connected on the slide rail in a sliding manner, a rebound spring is connected between the manual rack and the right wall of the reciprocating space, and a rotary gear disc shaft is rotatably connected on the rear wall of the reciprocating space, the front side and the rear side of the rotating gear disc shaft are fixedly connected with a rotating gear disc and a rotating auxiliary bevel gear, the right wall of the reciprocating space is rotatably connected with a moving roller shaft, the moving roller shaft extends rightwards to penetrate through the right wall of the reciprocating space to enter the changing space, the left side and the right side of the moving roller shaft are fixedly connected with a rotating main bevel gear and a moving roller, the rotating main bevel gear is meshed with the rotating auxiliary bevel gear, the moving roller is connected with a sliding block in a sliding manner, a friction ring is connected in the sliding block in a sliding manner, the left wall of the changing space is fixedly connected with a rotating motor, the right side surface of the rotating motor is in power connection with a right motor shaft which is rotatably connected with the left wall and the right wall of the changing space, an upper friction cylinder is fixedly connected on the right motor shaft, the left wall and the right wall of the changing space are rotatably connected with a transmission shaft, and the, the utility model discloses a hard shell cutting machine, including transmission shaft, friction cylinder, driving wheel, belt wheel, cutter device, the right side fixedly connected with of transmission shaft rotates a main belt wheel, a lower friction cylinder, down the friction cylinder with go up friction fit between the friction cylinder and have the friction ring, transmission space right side wall rotates and is connected with the friction cylinder axle, friction cylinder axle left and right sides fixedly connected with friction cylinder, revolute pair band pulley with rotate and be connected with the drive belt between the main belt wheel, remove the space be equipped with the controlling means who is used for controlling the sword to stretch out between the band wheel space, be equipped with the cutter device who is used for the cutting in the cutter space, be equipped with the boring cutter.

Preferably, the control device comprises a source motor fixedly installed on the top wall of the moving space, the bottom surface of the source motor is in power connection with a key shaft rotatably connected with the upper wall and the lower wall of the moving space, the key shaft is fixedly connected with a key, a large abutting cam is connected with the key shaft in a sliding manner, a pulling block is rotatably connected with the large abutting cam, a compression spring is connected between the large abutting cam and the bottom wall of the moving space, the top surface of the source motor is in power connection with an upper motor shaft rotatably connected with the bottom wall of the belt wheel space, a transmission main belt wheel is fixedly connected with the upper motor shaft, the bottom wall of the belt wheel space is rotatably connected with a through shaft, the through shaft extends downwards to penetrate through the bottom wall of the belt wheel space and enters the moving space, a transmission auxiliary belt wheel and a half gear are fixedly connected with the upper side and the lower side of the through shaft, and a friction belt is connected between the transmission auxiliary, the upper wall and the lower wall of the moving space are rotatably connected with a pulling belt drum shaft, the upper side and the lower side of the pulling belt drum shaft are fixedly connected with an engaging gear and a pulling belt drum, the engaging gear can be engaged with the half gear, the left wall of the moving space is slidably connected with an upper butt rod and a lower butt rod, the upper butt rod and the left wall of the moving space are connected with a strong spring, the lower butt rod and a return spring are connected between the left walls of the moving space, the upper butt rod extends leftwards to penetrate through the left wall of the moving space to enter the cutter space, and the lower butt rod extends leftwards to penetrate through the left wall of the moving space to enter the drill cutter space.

Preferably, the cutter device comprises a cutter changing box fixed on the upper abutting rod, a cutter changing space with a left opening is arranged in the cutter changing box, a transferring space with a downward opening is arranged on the right side of the cutter changing space, thin slide rails are fixedly connected in the cutter changing space in a vertically symmetrical manner, a moving slide block is connected in each of the two thin slide rails in a sliding manner, a miniature spring is connected between the moving slide block and the right wall of the cutter changing space, a driving shaft is rotatably connected in the moving slide block, a cutter, a pulling belt block and a transferring auxiliary bevel gear are fixedly connected on the upper side and the lower side of the driving shaft, a reciprocating belt drum shaft is rotatably connected on the top wall of the transferring space, a reciprocating belt drum and a telescopic mechanism are fixedly connected on the reciprocating belt drum shaft, the telescopic mechanism can enable the lower side of the reciprocating belt drum shaft to stretch, and a pulling belt is connected between the reciprocating belt drum and the, the lower side of the reciprocating belt drum shaft can be abutted to the friction drum, the left side face of the rotating motor is in power connection with a step-by-step main bevel gear rotationally connected with the right wall of the cutter space, and the step-by-step main bevel gear can be meshed with the step-by-step auxiliary bevel gear.

Preferably, the drill device comprises a drill rotatably mounted on the left side of the lower abutting rod, a friction wheel is fixedly connected to the drill, and an engaging mechanism is arranged in the space of the drill and can ascend to be in friction fit with the friction cylinder and the friction wheel.

Preferably, the protection device comprises an upper magnet and a lower magnet which are symmetrically and fixedly arranged on the machine body, the upper magnet and the lower magnet which are symmetrically and fixedly connected on the shell in the protection shell are respectively attracted by the upper magnet and the lower magnet, and a battery is arranged in the machine body.

The invention has the beneficial effects that: the multifunctional intelligent knife is characterized in that a speed change device is arranged in the multifunctional intelligent knife, the cutting speed can be controlled according to the requirements of a user, manual hand cutting is not needed, the workload of a user is greatly saved, a control device can control different knives to be replaced according to different purposes, a cutter device can automatically cut without manual cutting, a hole can be formed in a hard shell by a drill knife device, and the protection device can protect the user from being accidentally injured.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

The invention is further illustrated with reference to the following figures and examples.

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

FIG. 2 is a schematic diagram of the structure A in FIG. 1;

FIG. 3 is an enlarged schematic view of B-B of FIG. 1;

fig. 4 is a left side view of the cutter of fig. 1.

Detailed Description

The invention will now be described in detail with reference to fig. 1-4, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The invention relates to a multifunctional intelligent knife, which comprises a knife body 21, wherein a left cutter space 23 is arranged on the knife body 21, a transmission space 29 is arranged on the lower side of the cutter space 23, a left drill space 22 is arranged on the lower side of the transmission space 29, a shifting space 48 is arranged on the right side of the transmission space 29, a moving space 50 is arranged on the right side of the shifting space 48, a belt wheel space 55 is arranged on the upper side of the moving space 50, a reciprocating space 36 with an upward opening is arranged on the upper side of the shifting space 48, a speed change device for cutting speed is arranged among the reciprocating space 36, the shifting space 48 and the transmission space 29, the speed change device comprises a slide rail 37 fixedly arranged in the reciprocating space 36, a manual rack 35 is connected on the slide rail 37 in a sliding manner, and a rebound spring is connected between the manual rack 35 and the right wall of the reciprocating space 36, a rotating gear disc shaft 39 is rotatably connected to the rear wall of the reciprocating space 36, a rotating gear disc 38 and a rotating auxiliary bevel gear 80 are fixedly connected to the front side and the rear side of the rotating gear disc shaft 39, a moving roller shaft 40 is rotatably connected to the right wall of the reciprocating space 36, the moving roller shaft 40 extends rightwards to penetrate through the right wall of the reciprocating space 36 to enter the changing space 48, a rotating main bevel gear 81 and a moving roller 41 are fixedly connected to the left side and the right side of the moving roller shaft 40, the rotating main bevel gear 81 is engaged with the rotating auxiliary bevel gear 80, a sliding block 42 is slidably connected in the moving roller 41, a friction ring 49 is slidably connected in the sliding block 42, a rotating motor 43 is fixedly connected to the left wall of the changing space 48, a right motor shaft 45 rotatably connected to the left wall and the right wall of the changing space 48 is dynamically connected to the right side surface of the rotating motor 43, and an upper friction cylinder 46 is fixedly connected, the left wall and the right wall of the changing space 48 are rotatably connected with a transmission shaft 31, the transmission shaft 31 extends leftwards to penetrate through the left wall of the changing space 48 to enter the transmission space 29, the left side and the right side of the transmission shaft 31 are fixedly connected with a rotating main belt wheel 30 and a lower friction cylinder 47, the friction ring 49 is in friction fit between the lower friction cylinder 47 and the upper friction cylinder 46, the right wall of the transmission space 29 is rotatably connected with a friction cylinder shaft 33, the left side and the right side of the friction cylinder shaft 33 are fixedly connected with a friction cylinder 34 and a rotating auxiliary belt wheel 32, a transmission belt is connected between the rotating auxiliary belt wheel 32 and the rotating main belt wheel 30, a control device for controlling the extension of a knife is arranged between the moving space 50 and the belt wheel space 55, a cutter device for cutting is arranged in the cutter space 23, and a drill knife device for drilling a hard shell is arranged in the drill knife, a protection device for protecting people from being scratched by the knife is arranged in the machine body 21.

Advantageously, the control device comprises a source motor 51 fixedly mounted on the top wall of the moving space 50, a keyed shaft 67 rotatably connected with the upper and lower walls of the moving space 50 is connected to the bottom surface of the source motor 51, a key is fixedly connected to the keyed shaft 67, a large pushing cam 64 is connected to the keyed shaft 67 in a sliding manner, a pulling block 63 is rotatably connected to the large pushing cam 64, a compression spring is connected between the large pushing cam 64 and the bottom wall of the moving space 50, an upper motor shaft 52 rotatably connected with the bottom wall of the pulley space 55 is connected to the top surface of the source motor 51 in a sliding manner, a primary transmission pulley 53 is fixedly connected to the upper motor shaft 52, a through shaft 57 is rotatably connected to the bottom wall of the pulley space 55, the through shaft 57 extends downwards to penetrate through the bottom wall of the pulley space 55 to enter the moving space 50, and secondary transmission pulleys 56 are fixedly connected to the upper and lower sides of the through shaft 57, Half gear 59, be connected with friction belt 54 between transmission secondary pulley 56 and the transmission primary pulley 53, it pulls barrel shaft 61 to rotate to be connected with between the upper and lower wall of removal space 50, it has meshing gear 60, pulling barrel 62 to pull the fixedly connected with of the upper and lower side of barrel shaft 61, meshing gear 60 can with half gear 59 meshes, it has last butt pole 66, lower butt pole 65 to move the left wall sliding connection of space 50, go up butt pole 66 with be connected with the powerful spring between the left wall of removal space 50, lower butt pole 65 with be connected with the return spring between the left wall of removal space 50, go up butt pole 66 and extend to the left and run through the left wall of removal space 50 enter into in cutter space 23, lower butt pole 65 extends to the left and runs through the left wall of removal space 50 enters into in drill bit space 22.

Beneficially, the cutter device comprises a cutter changing box 68 fixed on the upper abutting rod 66, a cutter changing space 70 with a left opening is arranged in the cutter changing box 68, a transferring space 69 with a downward opening is arranged on the right side of the cutter changing space 70, thin slide rails 71 are symmetrically and fixedly connected in the cutter changing space 70 from top to bottom, a moving slider 72 is slidably connected in the two thin slide rails 71, a micro spring is connected between the moving slider 72 and the right wall of the cutter changing space 70, a driving shaft 74 is rotatably connected in the moving slider 72, a cutter 73, a pulling belt block 75 and a transferring auxiliary bevel gear 76 are fixedly connected on the upper side and the lower side of the driving shaft 74, a reciprocating belt cylinder shaft 78 is rotatably connected on the top wall of the transferring space 69, a reciprocating belt cylinder 79 and a telescopic mechanism 19 are fixedly connected on the reciprocating belt cylinder shaft 78, and the telescopic mechanism 19 can enable the lower side of the reciprocating belt cylinder shaft 78 to be telescopic, a pulling belt is connected between the reciprocating belt drum 79 and the pulling belt block 75, the lower side of the reciprocating belt drum shaft 78 can be abutted to the friction drum 34, the left side face of the rotating motor 43 is in power connection with a transmission main bevel gear 77 rotationally connected with the right wall of the cutter space 23, and the transmission main bevel gear 77 can be meshed with the transmission auxiliary bevel gear 76.

Advantageously, the drill bit device comprises a drill bit 27 rotatably mounted on the left side of the lower abutment rod 65, a friction wheel 28 is fixedly connected to the drill bit 27, and an engagement mechanism 20 is arranged in the drill bit space 22, wherein the engagement mechanism 20 can be lifted to be in friction fit with the friction cylinder 34 and the friction wheel 28.

Advantageously, the protection device comprises upper and lower symmetrical upper and lower magnets 26 fixedly mounted in the machine body 21, upper and lower symmetrical shell magnets 25 are fixedly connected in the protective shell 24, the two shell magnets 25 can respectively attract the two upper and lower magnets 26, and a battery 58 is arranged in the machine body 21.

The use steps herein are described in detail below with reference to fig. 1-4:

in the initial state, the two case magnets 25 and the two on-machine magnets 26 are attracted, the large cam 64 is pushed against the upper side of the keyed shaft 67, the tool changing box 68 is located in the cutter space 23, and the drill 27 is located in the drill space 22.

When the knife is needed, when the cutting is needed, the source motor 51 is reversely started, so that the upper motor shaft 52 rotates, so that the transmission main pulley 53 rotates, so that the power is transmitted to the transmission auxiliary pulley 56 through the friction belt 54, so that the penetrating shaft 57 rotates, so that the half gear 59 rotates, so that the meshing gear 60 rotates, so that the pulling belt drum 62 rotates, so that the abutting large cam 64 moves downward, so that the abutting large cam 64 abuts against the upper abutting rod 66, the source motor 51 is positively started, so that the belt key shaft 67 rotates, so that the abutting large cam 64 rotates, so that the upper abutting rod 66 moves leftward, so that the cutting knife 73 is extended out of the machine body, the rotating motor 43 is reversely started, so that the right motor shaft 45 rotates, the manual rack 35 is pushed by hand, so that the manual rack 35 moves leftward and rightward, so that the rotating fluted disc 38 rotates, thereby rotating the rotary dial shaft 39, thereby rotating the rotary sub-bevel gear 80, thereby rotating the rotary main bevel gear 81, thereby rotating the moving drum shaft 40, thereby rotating the moving drum 41, thereby moving the slide block 42 left and right, thereby moving the friction ring 49 left and right, thereby causing the upper friction cylinder 46 to transmit power to the lower friction cylinder 47 through the friction ring 49, thereby changing the transmission ratio, thereby causing the transmission shaft 31 to rotate, thereby causing the rotary main pulley 30 to rotate, thereby transmitting power to the rotary sub-pulley 32 through the belt, thereby causing the friction cylinder shaft 33 to rotate, thereby causing the friction cylinder 34 to rotate, thereby causing the upper motor shaft 52 to rotate, repeatedly activating the retracting mechanism 19, thereby causing the lower side of the reciprocating drum shaft 78 to abut against the friction cylinder 34 back and forth, thereby causing the reciprocating drum shaft 78 to rotate due to the rotation of the friction cylinder 34, thereby causing the reciprocating drum 79 to rotate, thereby pull back through bringing and pull the area piece 75, thereby make removal slider 72 round trip movement, take away protective housing 24, thereby make cutter 73 round trip movement cut the thing, be as the thing of cutting motionless, again forward start source motor 51, thereby make change the sword case 68 and continue to move forward, thereby make the vice bevel gear of going forward 76 and the meshing of the main bevel gear 77 that goes forward, forward start rotates motor 43, thereby make left motor shaft 44 rotate, thereby make the main bevel gear 77 that goes forward rotate, thereby make the vice bevel gear 76 that goes forward rotate, thereby make drive shaft 74 rotate, thereby make cutter 73 change into the sawtooth surface, thereby go to cut the thing of difficult cutting.

When it is desired to drill a hard shell, the lower abutment bar 65 is ejected by the source motor 51, and the engagement mechanism 20 is actuated, causing the friction wheel 28 to abut the engagement mechanism 20 and the friction cylinder 34 to also abut the engagement mechanism 20, thereby initiating drilling.

The invention has the beneficial effects that: the multifunctional intelligent knife is characterized in that a speed change device is arranged in the multifunctional intelligent knife, the cutting speed can be controlled according to the requirements of a user, manual hand cutting is not needed, the workload of a user is greatly saved, a control device can control different knives to be replaced according to different purposes, a cutter device can automatically cut without manual cutting, a hole can be formed in a hard shell by a drill knife device, and the protection device can protect the user from being accidentally injured.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.