阅读说明：本技术 一种车胎漏气后自动充气设备 (Automatic inflation equipment after tire leakage ) 是由 孙凤香 于 2020-08-11 设计创作，主要内容包括：本发明公开了一种车胎漏气后自动充气设备,所述壳体,所述壳体内设有拔钉腔,所述拔钉腔左上侧壁转动设有转动轴,所述转动轴上左侧固定设有第一传动轮,所述转动轴中侧固定设有齿向下的左扇形齿轮,所述转动轴右侧固定设有齿向上的右扇形齿轮,所述转动轴下方转动设有往复轴,所述往复轴上方固定设有齿向上往复轮,本发明的车胎充气设备,能迅速便捷地解决在道路上爆胎后的情况,自动升起千斤顶且降下,抬起漏气车胎面,对车胎进行全方位检测,拔出钉子,同时对内胎内的备用气囊进行充气,使得车胎气压恢复正常,可以进行短距离行驶,找到汽车修理店,对车胎进行更换,更安全和便捷,解决胎漏的尴尬处境。(The invention discloses an automatic inflating device for a tire after air leakage, which comprises a shell, wherein a nail pulling cavity is arranged in the shell, a rotating shaft is rotatably arranged on the upper left side wall of the nail pulling cavity, a first driving wheel is fixedly arranged on the left side of the rotating shaft, a left sector gear with downward teeth is fixedly arranged on the middle side of the rotating shaft, a right sector gear with upward teeth is fixedly arranged on the right side of the rotating shaft, a reciprocating shaft is rotatably arranged below the rotating shaft, and an upward reciprocating wheel is fixedly arranged above the reciprocating shaft. Is safer and more convenient, and solves the embarrassed situation of fetal leakage.)

1. The utility model provides a tire automatic inflation equipment after gas leakage, includes the casing, its characterized in that: a nail pulling cavity is arranged in the shell; the side wall rotates and is equipped with the axis of rotation on the left side of nail pulling cavity, the fixed first drive wheel that is equipped with in the left side of axis of rotation, the fixed left sector gear that is equipped with the tooth downwards in the axis of rotation middle side, the fixed right sector gear that is equipped with the tooth upwards in axis of rotation right side, axis of rotation below rotates and is equipped with reciprocating shaft, reciprocating shaft top is fixed and is equipped with the reciprocating wheel that reciprocates, reciprocating wheel is last to be fixed and is equipped with reciprocating wheel connecting rod, reciprocating wheel connecting rod right side is fixed and is equipped with the anchor clamps piece, the fixed anchor clamps connecting rod that is equipped with in anchor clamps piece left side downside, the rotation is equipped with the calliper axle on the anchor clamps connecting rod, calliper axle rear side is fixed and is equipped with the calliper wheel, calliper wheel is last to be fixed and is equipped with the calliper connecting rod, calliper, a left hinge rod is hinged on the connecting rod fixing block, a middle-end hinge shaft is rotatably arranged on the middle section of the clamp block, a middle-section connecting rod is fixedly arranged on the middle-end hinge shaft, a middle-section hinge rod is hinged between the middle-section connecting rod and the left hinge rod, a first transmission shaft is rotatably arranged at the right lower end of the clamp block, a right hinge rod is fixedly arranged at the front side of the first transmission shaft, the right hinge rod is fixedly connected with the left hinge rod, a second transmission wheel is fixedly arranged at the rear side of the first transmission shaft, a wheel motor is fixedly arranged below the nail pulling cavity, a wheel motor shaft is rotatably arranged on the wheel motor, a wheel shaft bevel gear is fixedly arranged at the rear side of the wheel motor shaft, a second transmission shaft is rotatably arranged at the left side of the wheel shaft bevel gear, a first bevel gear is fixedly arranged at the right side of the second, the pneumatic tire pressure detector is characterized in that a third driving wheel is fixedly arranged on the left side of the second driving shaft, a first driving belt is connected between the third driving wheel and the first driving wheel, an outer tire is fixedly arranged on the front side of a wheel motor shaft, an inner tire is fixedly arranged in the outer tire, a tire pressure detector is fixedly arranged between the inner tire and the outer tire, a standby air bag is fixedly arranged in the inner tire, and an inflating valve is fixedly arranged on the standby air bag.

2. A post-tire-leak automatic inflation apparatus according to claim 1, wherein: an inflation cavity is arranged on the right side of the nail pulling cavity, an inflation motor is fixedly arranged on the right lower portion of the inflation cavity, an inflation motor shaft is rotatably arranged on the left side of the inflation motor, a fourth transmission wheel is fixedly arranged on the right side of the inflation motor shaft, a second bevel gear is fixedly arranged on the left side of the inflation motor shaft, a mixing chamber is arranged in the nail pulling cavity, a mixing shaft is rotatably arranged on the rear side of the inflation cavity and extends into the mixing chamber, a mixing rod is fixedly arranged on the front end of the mixing shaft and can seal the mixing chamber, a third bevel gear is fixedly arranged in the middle section of the mixing shaft and can be meshed with the second bevel gear, a ratchet wheel is fixedly arranged on the rear end of the mixing shaft, a ratchet fixing block is fixedly arranged on the left side of the ratchet wheel and is rotatably provided with a ratchet shaft, a ratchet spring is connected between the ratchet wheel and the ratchet fixing block, the improved mixing chamber is characterized in that a clamping block cavity is arranged above the mixing chamber, a clamping block is arranged in the clamping block cavity in a sliding mode, a clamping block connecting rod is fixedly arranged on the clamping block, a clamping block spring is connected between the clamping block connecting rod and the side wall of the clamping block cavity, a sliding groove block is fixedly arranged on the clamping block connecting rod, a sealing shaft is arranged on the upper left side of the mixing chamber in a rotating mode, a sealing plate is fixedly arranged on the sealing shaft, the sealing plate can control the opening and closing of the mixing chamber in a rotating mode, a rotating block is fixedly arranged at the right end of the sealing shaft, a chute is fixedly arranged on the rotating block, the sliding groove block stretches into the chute, and a.

3. A post-tire-leak automatic inflation apparatus according to claim 1, wherein: a vertically symmetrical jack block is fixedly arranged at the lower right part of the shell, a left jack connecting rod is hinged at the left end of the jack block, a right jack connecting rod is hinged at the right end of the jack block, a third transmission shaft is rotatably arranged at the left side of the jack block, a fourth bevel gear is fixedly arranged at the rear side of the third transmission shaft, a third transmission belt is connected between the fourth bevel gear and the second transmission wheel, a fifth bevel gear is fixedly arranged at the front side of the third transmission shaft, a lead screw is rotatably arranged below the fifth bevel gear, a sixth bevel gear is fixedly arranged at the left side of the lead screw and can be meshed with the fifth bevel gear, the lead screw penetrates through the left jack connecting rod and the right jack connecting rod, the lead screw is in threaded connection with the left jack connecting rod and the right jack connecting rod, and a third transmission wheel is fixedly arranged at the right side of the lead screw, and a fourth transmission belt is connected between the third transmission wheel and the fourth transmission wheel.

Technical Field

The invention relates to the field of vehicle tires, in particular to automatic inflation equipment for a tire after air leakage.

Background

As is known to all, when a vehicle runs on a road, a tire is broken, the vehicle cannot run continuously, safety accidents are easy to happen, and therefore a spare tire must be replaced, and some vehicle owners cannot replace the spare tire, so that the vehicle owners can only call trailers or seek help, time and financial resources are wasted, and the vehicle owners are rare in people and dangerous in part of road sections, so that the problem needs to be solved by designing an automatic inflation device after the tire leaks.

Disclosure of Invention

The invention aims to provide an automatic inflating device after a tire leaks, which is used for overcoming the defects in the prior art.

The invention is realized by the following technical scheme.

According to the automatic inflation device after the tire leaks, the shell is internally provided with the nail pulling cavity; the side wall rotates and is equipped with the axis of rotation on the left side of nail pulling cavity, the fixed first drive wheel that is equipped with in the left side of axis of rotation, the fixed left sector gear that is equipped with the tooth downwards in the axis of rotation middle side, the fixed right sector gear that is equipped with the tooth upwards in axis of rotation right side, axis of rotation below rotates and is equipped with reciprocating shaft, reciprocating shaft top is fixed and is equipped with the reciprocating wheel that reciprocates, reciprocating wheel is last to be fixed and is equipped with reciprocating wheel connecting rod, reciprocating wheel connecting rod right side is fixed and is equipped with the anchor clamps piece, the fixed anchor clamps connecting rod that is equipped with in anchor clamps piece left side downside, the rotation is equipped with the calliper axle on the anchor clamps connecting rod, calliper axle rear side is fixed and is equipped with the calliper wheel, calliper wheel is last to be fixed and is equipped with the calliper connecting rod, calliper, a left hinge rod is hinged on the connecting rod fixing block, a middle-end hinge shaft is rotatably arranged on the middle section of the clamp block, a middle-section connecting rod is fixedly arranged on the middle-end hinge shaft, a middle-section hinge rod is hinged between the middle-section connecting rod and the left hinge rod, a first transmission shaft is rotatably arranged at the right lower end of the clamp block, a right hinge rod is fixedly arranged at the front side of the first transmission shaft, the right hinge rod is fixedly connected with the left hinge rod, a second transmission wheel is fixedly arranged at the rear side of the first transmission shaft, a wheel motor is fixedly arranged below the nail pulling cavity, a wheel motor shaft is rotatably arranged on the wheel motor, a wheel shaft bevel gear is fixedly arranged at the rear side of the wheel motor shaft, a second transmission shaft is rotatably arranged at the left side of the wheel shaft bevel gear, a first bevel gear is fixedly arranged at the right side of the second, the pneumatic tire pressure detector is characterized in that a third driving wheel is fixedly arranged on the left side of the second driving shaft, a first driving belt is connected between the third driving wheel and the first driving wheel, an outer tire is fixedly arranged on the front side of a wheel motor shaft, an inner tire is fixedly arranged in the outer tire, a tire pressure detector is fixedly arranged between the inner tire and the outer tire, a standby air bag is fixedly arranged in the inner tire, and an inflating valve is fixedly arranged on the standby air bag.

Further, an inflation cavity is arranged on the right side of the nail pulling cavity, an inflation motor is fixedly arranged on the right lower portion of the inflation cavity, an inflation motor shaft is rotatably arranged on the left side of the inflation motor, a fourth driving wheel is fixedly arranged on the right side of the inflation motor shaft, a second bevel gear is fixedly arranged on the left side of the inflation motor shaft, a mixing chamber is arranged in the nail pulling cavity, a mixing shaft is rotatably arranged on the rear side of the inflation cavity and extends into the mixing chamber, a mixing rod is fixedly arranged on the front end of the mixing shaft and can seal the mixing chamber, a third bevel gear is fixedly arranged in the middle section of the mixing shaft and can be meshed with the second bevel gear, a ratchet wheel is fixedly arranged on the rear end of the mixing shaft, a ratchet fixing block is fixedly arranged on the left side of the ratchet wheel, a ratchet shaft is rotatably arranged on the ratchet fixing block, and a, the improved mixing chamber is characterized in that a ratchet spring is connected between the ratchet and the ratchet fixing block, a clamping block cavity is arranged above the mixing chamber, a clamping block is arranged in the clamping block cavity in a sliding mode, a clamping block connecting rod is fixedly arranged on the clamping block, the clamping block spring is connected between the clamping block connecting rod and the side wall of the clamping block cavity, a sliding groove block is fixedly arranged on the clamping block connecting rod, a sealing shaft is arranged on the upper left side of the mixing chamber in a rotating mode, a sealing plate is fixedly arranged on the sealing shaft and can control the mixing chamber to be opened and closed through rotation, a rotating block is fixedly arranged at the right end of the sealing shaft, a chute is fixedly arranged on the rotating block, the sliding groove block stretches into the chute, and a hose is.

Furthermore, a jack block which is symmetrical up and down is fixedly arranged at the lower right part of the shell, a left jack connecting rod is hinged at the left end of the jack block, a right jack connecting rod is hinged at the right end of the jack block, a third transmission shaft is rotatably arranged at the left side of the jack block, a fourth bevel gear is fixedly arranged at the rear side of the third transmission shaft, a third transmission belt is connected between the fourth bevel gear and the second transmission wheel, a fifth bevel gear is fixedly arranged at the front side of the third transmission shaft, a lead screw is rotatably arranged below the fifth bevel gear, a sixth bevel gear is fixedly arranged at the left side of the lead screw and can be meshed with the fifth bevel gear, the lead screw penetrates through the left jack connecting rod and the right jack connecting rod, the lead screw is in threaded connection with the left jack connecting rod and the right jack connecting rod, and a third transmission wheel is fixedly arranged at the right side of the lead screw, and a fourth transmission belt is connected between the third transmission wheel and the fourth transmission wheel.

The invention has the beneficial effects that: the tire inflation device can rapidly and conveniently solve the problem after tire burst on a road, automatically raise the jack and lower the jack, lift the tire surface of a deflated tire, carry out all-around detection on the tire, pull out nails, and simultaneously inflate the spare air bag in the tire, so that the air pressure of the tire is recovered to be normal, the tire can run for a short distance, an automobile repair shop can be found, the tire can be replaced, the tire inflation device is safer and more convenient, and the embarrassing situation of tire leakage is solved.

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.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of the structure A-A of FIG. 1;

FIG. 3 is a schematic diagram of B-B of FIG. 1;

fig. 4 is a schematic diagram of the structure C-C in fig. 3.

Detailed Description

The invention will now be described in detail with reference to fig. 1-4, for convenience of description, the following orientations will now be defined: 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.

Combine the automatic inflation equipment behind tire gas leakage of attached figure 1-4, including casing 10, be equipped with in the casing 10 and pull out nail chamber 72, it is equipped with axis of rotation 13 to pull out nail chamber 72 upper left side wall rotation, the fixed first drive wheel 14 that is equipped with in left side on the axis of rotation 13, the fixed left sector gear 12 that is equipped with the tooth downwards in the axis of rotation 13 middle side, the fixed ascending right sector gear 11 that is equipped with the tooth in axis of rotation 13 right side, axis of rotation 13 below is rotated and is equipped with reciprocating shaft 16, the fixed reciprocal wheel 74 that is equipped with in reciprocal shaft 16 top, the fixed reciprocal wheel connecting rod 73 that is equipped with on the reciprocal wheel 74, the fixed anchor clamps piece 71 that is equipped with in reciprocal wheel connecting rod 73 right side, the fixed anchor clamps connecting rod 17 that is equipped with in anchor clamps piece 71 left downside, the rotation is equipped with clamp shaft 18 on the anchor clamps connecting rod 17, the fixed callipers, the caliper wheel 19 is fixedly provided with a caliper connecting rod 22, a caliper fixing block 24 is fixedly arranged below the caliper connecting rod 22, a caliper 25 is fixedly arranged below the caliper fixing block 24, a connecting rod fixing block 20 is fixedly arranged on the right side of the caliper connecting rod 22, a left hinge rod 23 is hinged on the connecting rod fixing block 20, a middle-end hinge shaft 69 is rotatably arranged on the middle section of the clamp block 71, a middle-end hinge rod 68 is fixedly arranged on the middle-end hinge shaft 69, a middle-section hinge rod 70 is hinged between the middle-section hinge rod 68 and the left hinge rod 23, a first transmission shaft 65 is rotatably arranged at the right lower end of the clamp block 71, a right hinge rod 66 is fixedly arranged on the front side of the first transmission shaft 65, the right hinge rod 66 is fixedly connected with the left hinge rod 23, a second transmission wheel 67 is fixedly arranged on the rear side of the first transmission shaft 65, and a wheel motor 75, the tire pressure monitoring device is characterized in that a wheel motor shaft 33 is arranged on the wheel motor 75 in a rotating mode, a wheel shaft bevel gear 76 is fixedly arranged on the rear side of the wheel motor shaft 33, a second transmission shaft 27 is arranged on the left side of the wheel shaft bevel gear 76 in a rotating mode, a first bevel gear 77 is fixedly arranged on the right side of the second transmission shaft 27, the first bevel gear 77 can be meshed with the wheel shaft bevel gear 76, a third transmission wheel 26 is fixedly arranged on the left side of the second transmission shaft 27, a first transmission belt 15 is connected between the third transmission wheel 26 and the first transmission wheel 14, an outer tire 30 is fixedly arranged on the front side of the wheel motor shaft 33, an inner tire 31 is fixedly arranged in the outer tire 30, a tire pressure detector 34 is fixedly arranged between the inner tire 31 and the outer tire 30, a standby air bag 32 is fixedly arranged in.

In addition, in one embodiment, an inflation cavity 82 is arranged on the right side of the nail pulling cavity 72, an inflation motor 79 is fixedly arranged on the right lower side of the inflation cavity 82, an inflation motor shaft 51 is rotatably arranged on the left side of the inflation motor 79, a fourth transmission wheel 49 is fixedly arranged on the right side of the inflation motor shaft 51, a second bevel gear 81 is fixedly arranged on the left side of the inflation motor shaft 51, a mixing chamber 54 is arranged in the nail pulling cavity 72, a mixing shaft 53 is rotatably arranged on the rear side of the inflation cavity 82, the mixing shaft 53 extends into the mixing chamber 54, a mixing rod 52 is fixedly arranged at the front end of the mixing shaft 53, the mixing rod 52 can seal the mixing chamber 54, a third bevel gear 80 is fixedly arranged at the middle section of the mixing shaft 53, the third bevel gear 80 can be meshed with the second bevel gear 81, a ratchet 50 is fixedly arranged at the rear end of the mixing shaft 53, and a ratchet, a ratchet shaft 44 is rotatably arranged on the ratchet fixing block 43, a ratchet 45 is fixedly arranged on the ratchet shaft 44, a ratchet spring 78 is connected between the ratchet 45 and the ratchet fixing block 43, a clamping block cavity 57 is arranged above the mixing chamber 54, a clamping block 55 is arranged in the clamping block cavity 57 in a sliding manner, a clamping block connecting rod 58 is fixedly arranged on the clamping block 55, a clamping block spring 56 is connected between the clamping block connecting rod 58 and the side wall of the clamping block cavity 57, a sliding groove block 59 is fixedly arranged on the clamping block connecting rod 58, a closed shaft 62 is rotatably arranged at the upper left of the mixing chamber 54, a closed plate 63 is fixedly arranged on the closed shaft 62, the closing plate 63 can control the opening and closing of the mixing chamber 54 by rotating, a rotating block 61 is fixedly arranged at the right end of the closing shaft 62, the rotating block 61 is fixedly provided with a chute 60, the chute block 59 extends into the chute 60, a hose 29 is rotatably connected between the upper left end of the mixing chamber 54 and the valve 28.

In addition, in one embodiment, a vertically symmetrical jack block 41 is fixedly arranged at the lower right of the housing 10, a left jack connecting rod 39 is hinged at the left end of the jack block 41, a right jack connecting rod 39 is hinged at the right end of the jack block 41, a third transmission shaft 37 is rotatably arranged at the left side of the jack block 41, a fourth bevel gear 35 is fixedly arranged at the rear side of the third transmission shaft 37, a third transmission belt 64 is connected between the fourth bevel gear 35 and the second transmission wheel 67, a fifth bevel gear 36 is fixedly arranged at the front side of the third transmission shaft 37, a lead screw 40 is rotatably arranged below the fifth bevel gear 36, a sixth bevel gear 38 is fixedly arranged at the left side of the lead screw 40, the sixth bevel gear 38 can be meshed with the fifth bevel gear 36, the lead screw 40 passes through the left jack connecting rod 39 and the right jack connecting rod 39, and the lead screw 40 is in threaded connection with the left jack connecting rod 39 and the right jack connecting rod 39, a third driving wheel 47 is fixedly arranged on the right side of the screw rod 40, and a fourth driving belt 48 is connected between the third driving wheel 47 and the fourth driving wheel 49.

The working state is as follows: in the initial state, the tire pressure of the inner tube 31 is normal, the tire pressure detector 34 does not alarm, the wheel motor 75 is not started, the wheel motor shaft 33 does not rotate, the wheel shaft bevel gear 76 does not rotate, the first bevel gear 77 does not rotate, the second transmission shaft 27 does not rotate, the third transmission wheel 26 does not rotate, the first transmission wheel 14 does not rotate, the rotating shaft 13 does not rotate, the clamp block 71 is kept stationary, the inflation motor 79 does not start, the inflation motor shaft 51 does not rotate, the second bevel gear 81 does not rotate, the third bevel gear 80 does not rotate, the mixing shaft 53 does not rotate, the mixing rod 52 does not rotate, the mixing chamber 54 is not pushed, the latch connecting rod 58 does not move, the chute block 59 does not slide in the chute 60, the sealing shaft 62 does not rotate, the sealing plate 63 seals the mixing chamber 54, powder in the mixing chamber 54 does not contact and does not generate gas, the backup airbag 32, the jack right link 39 and the jack left link 39 are maintained in a nearly horizontal state, the sixth bevel gear 38 does not rotate, the fifth bevel gear 36 does not rotate, the third transmission shaft 37 does not rotate, the fourth bevel gear 35 does not rotate, the second transmission wheel 67 does not rotate, the first transmission shaft 65 does not rotate, the right hinge lever 66 is maintained in a vertical state, and the caliper 25 is retracted.

When the tire starts to work, the outer tire 30 is pricked by a nail, the air pressure in the inner tire 31 is reduced, the tire pressure detector 34 gives an alarm, the inflation motor 79 is started, the inflation motor shaft 51 rotates to drive the fourth transmission wheel 49 to rotate, the third transmission wheel 47 to rotate, the lead screw 40 to rotate, the jack left connecting rod 39 and the jack right connecting rod 39 to rotate, the jack block 41 moves downwards to jack the vehicle, the sixth bevel gear 38 rotates to drive the fifth bevel gear 36 to rotate, the third transmission shaft 37 to rotate, the fourth bevel gear 35 to rotate, the second transmission wheel 67 to rotate, the first transmission shaft 65 to rotate, the right hinge rod 66 to rotate, the left hinge rod 23 to rotate, the caliper shaft 18 to rotate, the caliper connecting rod 22 to rotate, the caliper 25 is in a vertical state, the wheel motor 75 is started to drive the wheel motor shaft 33 to rotate, and the outer tire 30 is driven to rotate, the wheel shaft bevel gear 76 rotates to drive the first bevel gear 77 to rotate, and drive the second transmission shaft 27 to rotate, so that the third transmission wheel 26 rotates, and drives the first transmission wheel 14 to rotate, so that the rotation shaft 13 rotates, the left sector gear 12 downwards engages with the reciprocating wheel 74, and drives the reciprocating wheel 74 to rotate inwards, and drives the clamp block 71 to move inwards, the right sector gear 11 further downwards engages with the reciprocating wheel 74, and drives the clamp block 71 to move outwards, and the nails on the tire are extracted in an S shape, meanwhile, the inflation motor shaft 51 rotates to drive the second bevel gear 81 to rotate, and drives the third bevel gear 80 to rotate, and drives the mixing shaft 53 to rotate, so that the mixing rod 52 rotates, the mixing rod 52 rotates to push the fixture block 55, so that the fixture block link 58 moves upwards, so that the rotation block 61 rotates, and drives the sealing shaft 62 to rotate, so that the sealing plate 63 opens the pipeline of the mixing chamber 54, and discharges, the air pressure of the inner tube 31 is increased and kept normal until the vehicle can simply run.

After inflation, the inflation motor 79 rotates reversely to drive the fourth transmission wheel 49 to rotate reversely, drive the third transmission wheel 47 to rotate reversely, drive the screw 40 to rotate reversely, so that the jack left connecting rod 39 and the jack right connecting rod 39 contract, the automobile is put down, at the same time, the fourth bevel gear 35 rotates reversely to drive the second transmission wheel 67 to rotate reversely, drive the first transmission shaft 65 to rotate reversely, so that the first transmission shaft 65 contracts, drive the caliper 25 to contract, stop the inflation motor 79, stop the wheel motor 75, the wheel motor shaft 33 does not rotate, the wheel shaft bevel gear 76 does not rotate, the first bevel gear 77 stops rotating, the second transmission shaft 27 stops rotating, the first transmission wheel 14 does not rotate, and the rotating shaft 13 does not rotate.

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.