阅读说明：本技术 半圆形螺旋扩大器开锁器 (Unlocking device for semicircular spiral expander ) 是由 陈一文 于 2021-01-25 设计创作，主要内容包括：本发明提供一种半圆形螺旋扩大器开锁器,其包括套壳、手柄和推动杆,所述套壳内部设有圆弧滑道和开锁机构,开锁机构底端与圆弧滑道活动连接,且套壳与手柄一端固定连接；手柄内部设有直线滑道和滑杆,滑杆可在直线滑道内滑动；推动杆一端与开锁机构连接,另一端铰接于滑杆,开锁机构、推动杆和滑杆构成曲柄滑块机构,滑杆在直线滑道内移动,带动推动杆移动,从而驱动开锁机构在圆弧滑道内滑动,当开锁机构滑动到螺旋扩大器钥匙孔上方,设置在开锁机构内部的开锁器钥匙自动弹出,实现开锁效果,完成扩弓操作。本发明在使用过程中可以很好地避免钥匙脱落或扩弓不到位等情况出现,同时操作者无需将手伸入口腔即可完成扩弓操作,减少误伤的可能性,提高治疗效率。(The invention provides a semicircular spiral expander unlocking device which comprises a casing, a handle and a push rod, wherein an arc slideway and an unlocking mechanism are arranged in the casing; a linear slideway and a sliding rod are arranged in the handle, and the sliding rod can slide in the linear slideway; one end of the push rod is connected with the unlocking mechanism, the other end of the push rod is hinged to the slide rod, the unlocking mechanism, the push rod and the slide rod form a slider-crank mechanism, the slide rod moves in the linear slide way to drive the push rod to move, so that the unlocking mechanism is driven to slide in the arc slide way, when the unlocking mechanism slides to the position above the key hole of the spiral expander, the key of the unlocking device arranged in the unlocking mechanism automatically pops up, the unlocking effect is achieved, and the bow expanding operation is completed. The invention can well avoid the situation that the key falls off or the bow expansion is not in place and the like in the using process, and meanwhile, the bow expansion operation can be completed without the need of putting the hand into the oral cavity, thereby reducing the possibility of accidental injury and improving the treatment efficiency.)

1. The unlocking device for the semicircular spiral expander is characterized by comprising a casing, a handle and a push rod, wherein an arc slideway and an unlocking mechanism matched with the spiral expander are arranged in the casing; a linear slideway and a sliding rod are arranged in the handle, and the sliding rod can slide in the linear slideway; one end of the push rod is connected with the unlocking mechanism, the other end of the push rod is hinged to the sliding rod, and the unlocking mechanism, the push rod and the sliding rod form a crank-slider mechanism.

2. The semicircular spiral expander unlocking device according to claim 1, wherein the unlocking mechanism comprises a conical tube, an unlocking device key, a spring and a limiting device, the unlocking device key, the spring and the limiting device are all placed in the conical tube, the unlocking device key is fixed in the spring, the limiting device is arranged above the spring, the bottom of the limiting device is fixedly connected with the spring, and the other end of the spring is fixedly connected to the bottom of the conical tube.

3. The semicircular expander opener according to claim 2, wherein the top of the position-limiting device is provided with an elastic connecting piece which can pass through the side wall of the taper pipe, one end of the elastic connecting piece is fixedly connected to the top of the position-limiting structure, and the other end of the elastic connecting piece is hinged to the push rod.

4. The semicircular spiral expander unlocking device according to claim 2, wherein flanges are arranged at the upper end and the lower end of the conical pipe, and the flanges are clamped in the arc slideway; the arc slideway comprises an inner layer and an outer layer, and flanges at the upper end and the lower end of the unlocking mechanism are respectively clamped in the outer layer arc slideway and the inner layer arc slideway.

5. The semicircular spiral expander unlocking device according to claim 1, wherein the linear slideway in the handle is a double-layer slideway, and a small raised baffle is arranged at the middle position of the lower layer of the double-layer slideway; one end of the push rod, which is close to the slide rod, is provided with a diameter increasing area.

6. The semicircular helical expander opener according to claim 1, wherein a baffle is further provided inside the casing, and the baffle is provided at an extreme position where the middle shaft of the helical expander is driven to rotate by the unlocking mechanism.

7. The semicircular expander opener according to claim 1, wherein the casing has semicircular positioning holes formed at both ends of the bottom thereof, and a semicircular middle positioning hole formed at the middle of the bottom thereof, the radius of the positioning holes matching the radius of the cross bars at both sides of the spiral expander, and the radius of the middle positioning hole matching the radius of the middle shaft of the spiral expander.

8. The semicircular spiral expander unlocking device according to claim 1, wherein a rocker is further provided outside the handle, and the rocker is fixedly connected with one end of the sliding rod.

9. The semicircular expander opener according to claim 2, wherein said opener key is in the form of a truncated cone with the smaller diameter end facing the bottom of the cone.

10. The semicircular expander opener according to claim 2, wherein said cone is provided with an inward protrusion at a wall of the tube near a bottom end of the stopper.

Technical Field

The invention belongs to the field of medical instruments for oral cavity, and particularly relates to a semicircular spiral expander unlocking device.

Background

The expander, which is typically comprised of a screw expander, a retention clasp, a doubly curved labial arch and a base, is opened by rotation of a keyhole on a middle metal shaft by an opener, thereby transmitting an orthodontic or corrective force through the base or bracket to the teeth and alveolar bone to open the palatal slit and/or expand the width of the upper and lower dental arch.

The existing unlocking device for opening the spiral expander is mainly a steel wire bending adjusting rod which is in accordance with the diameter of a key hole of the spiral expander, and is shown in figure 1. However, in daily oral treatment, the lock opener has the following disadvantages:

1. the children patients are younger, the oral cavity volume is limited, the parents need to put the hands into the mouth of the patient when carrying out the bow-expanding operation,

accidental injury is easy to occur, bacteria are easy to be brought into oral cavities, and health hidden danger is brought;

2. the 'keyhole' of the spiral expander has a small aperture, so that a proper angle is difficult to find and insert into the 'keyhole' in the operation process, and the lock hole position is probably rotated when one-time bow expanding operation is finished and the lock opener is about to be drawn out, so that the next bow expanding operation is difficult to find a hole when the bow expanding amount is influenced;

3. the working end of the traditional unlocking device is of a linear structure, the whole is longer, the tip is sharper, and the possibility that the palatal mucosa of a child patient is stabbed by passing through a key hole or an expanded base gap exists in the operation process.

Therefore, there is a need to provide a novel unlocking device for a screw expander, which facilitates the operation of expanding the arch by the operator, reduces the possibility of the above problems, and improves the efficiency of orthodontic treatment.

Disclosure of Invention

In view of the above, the invention provides a semicircular spiral expander unlocking device, which integrates an unlocking adjusting rod inside the unlocking device, so that an operator only needs to operate outside the oral cavity, thereby avoiding inconvenient operation caused by narrow operation space, reducing the probability of bacterial infection possibly caused by hand entering the oral cavity, well controlling the length of the adjusting rod entering a 'keyhole', and avoiding the situation of mistaken swallowing.

The invention provides a semicircular spiral expander unlocking device, which is realized by the following technical scheme:

a semicircular spiral expander unlocking device comprises a casing, a handle and a push rod, wherein an arc slideway and an unlocking mechanism matched with the spiral expander are arranged in the casing, the bottom end of the unlocking mechanism is movably connected with the arc slideway, and the casing is fixedly connected with one end of the handle; a linear slideway and a sliding rod are arranged in the handle, and the sliding rod can slide in the linear slideway; one end of the push rod is connected with the unlocking mechanism, the other end of the push rod is hinged to the sliding rod, and the unlocking mechanism, the push rod and the sliding rod form a crank-slider mechanism.

Compared with the prior art, the invention has the following technical effects:

the invention adopts a crank-slider mechanism, a lock opener is sleeved on a spiral expander, a slide rod moves on a linear slideway, and a push rod is pulled, so that the unlocking mechanism is driven to slide on an arc slideway in a casing, the reciprocating linear movement of a driving slider is converted into the rotation of a driven crank, namely, the unlocking mechanism does circular motion in the arc slideway of the casing, the unlocking mechanism automatically matches and enters a key hole of the spiral expander in the sliding process, and the spiral lock part of the spiral expander is driven to rotate under the motion effect of the crank-slider mechanism, so that the bow expanding effect is realized. The device can well prevent an operator from directly stretching the hand into the oral cavity, can realize the bow expansion operation outside the oral cavity, can find the operation angle easily in the operation process, and can drive the unlocking mechanism to pop out by moving the sliding rod after finishing the once bow expansion operation, thereby avoiding the rotation of the position of the lock hole and avoiding the required bow expansion amount.

Furthermore, the unlocking mechanism comprises a taper pipe, a lock opener key, a spring and a limiting device, the lock opener key, the spring and the limiting device are all placed in the taper pipe, the lock opener key is fixed in the spring, the limiting device is arranged above the spring, the bottom of the limiting device is fixedly connected with the spring, and the other end of the spring is fixedly connected to the bottom of the taper pipe. The unlocking device key and the spring are fixed at the lower end of the taper pipe, the limiting device is arranged above the spring, the bottom of the limiting device is fixedly connected with the spring, when the spring is in a compressed state and the taper pipe structure slides to the position of the key hole of the spiral expander, the unlocking device key is bounced into the key hole from the taper pipe opening, and the push rod is continuously pushed to realize unlocking.

Furthermore, the top of the limiting device is provided with an elastic connecting piece which can penetrate through the side wall of the taper pipe, one end of the elastic connecting piece is fixedly connected to the top of the limiting structure, and the other end of the elastic connecting piece is hinged to the push rod. The device adopts an elastic connecting piece to connect a push rod and an unlocking mechanism, the push rod and a slide rod form a slider-crank mechanism, the slide rod moves in a linear slideway to drive the unlocking mechanism to slide in an arc slideway, under the motion effect of the slider-crank mechanism, a limiting device fixed with one end of the elastic connecting piece receives the pressure from the elastic connecting piece to press an unlocking device key to a conical tube opening, if the conical tube opening faces to the shaft wall of a spiral expander at the moment, a spring is in a compression state, namely the unlocking device key is in an activated state, when the unlocking mechanism slides to the upper part of a key hole, and the conical tube opening is aligned to the key hole, the unlocking device key is bounced into the key hole.

Furthermore, flanges are arranged at the upper end and the lower end of the taper pipe and are clamped in the arc slide ways; the arc slideway comprises an inner layer and an outer layer, and flanges at the upper end and the lower end of the unlocking mechanism are respectively clamped in the outer layer arc slideway and the inner layer arc slideway. Flanges are arranged at the upper end and the lower end of the unlocking mechanism, so that the two ends of the unlocking mechanism are clamped in the arc slide ways and can freely slide in the arc slide ways, and the unlocking effect of the spiral amplifier is realized.

Furthermore, the linear slideway in the handle is a double-layer slideway, and a small raised baffle is arranged in the middle of the lower layer of the double-layer slideway; one end of the push rod, which is close to the slide rod, is provided with a diameter increasing area. When the sliding rod moves on the lower layer slideway, one end of the pulling push rod is pulled to move towards the far end of the handle, meanwhile, the other end of the push rod pulls the unlocking mechanism to do reverse circular motion along the arc slideway, when the sliding rod moves through the small baffle plate of the lower layer slideway, the diameter increasing area on the push rod is abutted against the small baffle plate, the end part of the push rod connected with the sliding rod continues to move along with the sliding rod, but the whole rod body is pressed downwards under the jacking action of the small baffle plate, so that a key of the unlocking device in the unlocking mechanism has the tendency of protruding out of the taper pipe downwards and is in an activated state, and when a new round of bow expanding operation is started, the unlocking mechanism automatically enters the spiral expander when moving to the.

Furthermore, a baffle is further arranged inside the casing, and the baffle is arranged at the limit position where the unlocking mechanism drives the spiral expander to rotate along the axial far end in the middle, so that the sliding range of the unlocking mechanism on the arc slideway is limited. When the unlocking mechanism in the shell slides to the position of the baffle, the unlocking mechanism is prevented from continuing to do circular motion, and at the moment, the sliding rod is positioned at one end, close to the shell, of the linear double-layer slideway in the handle and continuously pushes forwards to withdraw the key of the unlocking device in the unlocking mechanism.

Furthermore, semicircular positioning holes are respectively formed in two ends of the bottom of the casing, a semicircular middle positioning hole is formed in the middle of the bottom surface of the casing, the radius of each positioning hole is matched with the radius of the cross rods on two sides of the spiral expander, and the radius of each middle positioning hole is matched with the radius of the middle shaft of the spiral expander; the casing shell is fixed on the metal shafts on two sides of the spiral expander through the positioning holes at two ends of the bottom, and the middle positioning hole is sleeved on the adjusting ring of the middle metal shaft of the spiral expander, so that the problem that the positioning is difficult in the actual operation process is solved, and the subsequent unlocking and bow expanding operation is facilitated.

Preferably, a rocker is arranged on the outer side of the sleeve handle and fixedly connected with one end of the sliding rod. The rocker connected with the slide bar is arranged on the outer side of the handle, and the rocker drives the slide bar to move in the linear slideway, so that the unlocking effect is realized.

Preferably, the lock opener key is in a round table shape, and one end with a small diameter faces the bottom of the taper pipe. The key of the unlocking device is designed into a round table with a certain taper, so that the key can conveniently enter the key hole.

Preferably, the pipe wall of the taper pipe close to the bottom end of the limiting device is provided with an inward bulge. The conical tube walls on the two sides of the unlocking mechanism are provided with inward bulges to prevent the key of the unlocking device from excessively descending.

Drawings

FIG. 1 is a conventional lock opener of the prior art;

FIG. 2 is a schematic structural diagram of the unlocking device of the semicircular helical expander of the present invention;

FIG. 3 is a top view of the lock opener for the semicircular helical expander of the present invention;

FIG. 4 is a schematic view of an unlocking mechanism in the unlocking device of the semicircular screw expander according to the present invention;

FIG. 5 is a diagram illustrating a state of movement of a slide bar on an upper slide rail in the unlocking device of the semicircular expander according to the present invention;

FIG. 6 is a view showing the state that the slide bar is moved to the lower slide rail in the unlocking device for the semicircular expander according to the present invention.

Wherein, 1-a casing; 2-a handle; 3-pushing the rod; 11-an unlocking mechanism; 12-inner layer arc slideway; 13-outer layer arc slideway; 14-a baffle; 15-positioning holes; 16-middle positioning hole; 21-double-layer linear slideway; 22-a slide bar; 23-small baffles; 24-a rocker; 31-a diameter increasing area; 111-an opener key; 112-a spring; 113-a restriction device; 114-a lower end flange; 115-an upper end flange; 116-a spring plate; 117-cone.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the specification, but the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and the scope of the present invention is not limited thereto.

In the description of the present invention, it is to be understood that the orientations and positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like are based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The invention provides a semicircular unlocking device for a spiral expander, which at least solves the problem that the unlocking device for the arch expander in the prior art is inconvenient to operate, and please refer to fig. 2, wherein the unlocking device comprises a casing 1, a handle 2 and a push rod 3, wherein the casing 1 and the handle 2 are integrally formed, the width of the casing 1 is slightly larger than the length of an adjusting ring on a metal shaft in the middle of the spiral expander, an unlocking mechanism 11 and an arc slideway are arranged in the casing 1, a double-layer linear slideway 21 and a slide rod 22 are arranged in the handle 2, one end of the push rod 3 is hinged to the unlocking mechanism 11, and the other end of the push rod is hinged to the slide rod 22, so that a crank-slider structure is formed, the push rod 3 is pulled by moving the slide rod 22 in the linear slideway, the unlocking mechanism 11 makes circular motion in the arc slideway, and is matched with.

Specifically, as shown in fig. 2 and 4, the jacket 1 includes an unlocking mechanism 11, an arc slideway and a baffle 14, the unlocking mechanism 11 includes a taper pipe 117, a lock opener key 111, a spring 112, a limiting device 113 and an elastic connector, in this embodiment, the limiting device 113 is in an i-shaped structure, one end of the spring 112 is fixedly connected to the bottom of the limiting device 13, the other end of the spring is fixedly connected to a taper pipe opening, the lock opener key 111 is fixed in the spring 112, and the bottom end of the lock opener key 111 can pass through the taper pipe opening; the elastic connecting piece is an elastic sheet 116, one end of the elastic sheet 116 is fixedly connected to the top of the limiting device 113, and the other end of the elastic sheet is hinged to the push rod 3 through the side wall of the taper pipe 117, so that the elastic sheet provides elasticity for the limiting device 113 to stretch or compress the spring 112 on one hand, and the collision between the limiting device 113 and the taper pipe 117 is buffered on the other hand; meanwhile, flanges are arranged at the upper end and the lower end of the taper pipe 117, and the upper end flange 115 and the lower end flange 114 are respectively clamped in the arc slide ways; the arc slideway is divided into an inner arc slideway 12 and an outer arc slideway 13, a lower end flange 114 is clamped in the inner arc slideway 12, and an upper end flange 115 is clamped in the outer arc slideway 13; the baffle 14 sets up unlocking mechanism 11 and slides to the extreme position that the helical expander jackshaft rotated the distal end in cover 1 inside lock mechanism 11, refer to fig. 2, the area that two dotted lines and the circular arc slide of locating hole 15 top are the biggest scope of helical expander jackshaft pivoted, the slip range of unlocking mechanism 11 promptly, baffle 14 sets up in unlocking mechanism 11 and slides to the extreme position department of distal end, when unlocking mechanism 11 slides to baffle 14 position, slide bar 22 moves to the near-end extreme position that is close to double-deck straight line slide 21, continue to promote slide bar 22 to the handle 2 near-end this moment, baffle 14 blocks that unlocking mechanism 11 continues to do the circular motion.

Specifically, as shown in fig. 2 and 3, a double-layer linear slideway 21, a sliding rod 22 and a small baffle 23 are arranged inside the handle 2, the sliding rod 22 moves in the double-layer linear slideway 21, the small baffle 23 is arranged at the middle position of the lower layer slideway of the double-layer linear slideway 21, protrudes downwards and allows the sliding rod 22 to pass through; meanwhile, a rocker 24 is arranged on the outer side of the handle, one end of the rocker 24 is fixedly connected with the sliding rod 22, and the sliding rod 22 is driven to move in the double-layer linear slideway 21 by the rocker 24

Specifically, as shown in fig. 2, the push rod 3 is provided with a diameter increasing region 31 near the end portion thereof close to the slide bar 22.

Based on the above solution, the following movement process of the device is described here:

when the sliding rod 22 is positioned at the far end of the double-layer linear slideway 21 of the handle 2, the included angle between the unlocking mechanism 11 and the pushing rod 3 is nearly 180 degrees, when the driving rocker 24 drives the sliding rod 22 to move towards the casing 1, the included angle between the unlocking mechanism 11 and the pushing rod 3 is reduced, and the unlocking mechanism 11 is gradually changed into a vertical state from a horizontal state; as shown in fig. 5, during the movement, the pushing rod 3 applies upward pulling force to the elastic sheet 116, the other end of the elastic sheet 116 presses the limiting device 113 downward, the spring 112 is compressed by the pressure of the limiting device 113, so that the key 111 of the unlocking device tends to pop out toward the bottom end of the taper pipe 117, that is, the key 111 of the unlocking device is in an activated state, when the unlocking mechanism 11 slides to the keyhole of the spiral expander, the key 111 of the unlocking device automatically pops into the keyhole to be matched with the spiral expander, at this time, the sliding rod 22 is continuously pushed to drive the unlocking mechanism 11 to slide, and the middle metal shaft of the spiral expander is pulled to realize the bow expanding operation; when the unlocking mechanism 11 passes through a position vertical to the horizontal line, the push rod 3 has downward pressure on the elastic sheet 116, the elastic sheet 116 has upward tension on the limiting device 113 connected with the other end of the elastic sheet 116, so that the limiting device 113 is driven to move upwards, the spring 112 is stretched upwards, the unlocking device key 111 is retracted into the unlocking mechanism 11, and at the moment, the unlocking device key 111 is disengaged from the spiral expander; as shown in fig. 6, when the unlocking mechanism 11 slides to the position of the baffle 14, the sliding rod 22 moves to the near-end limit position close to the double-layer linear slideway 21, the unlocking mechanism 11 cannot slide forward any more, at this time, the sliding rod 22 is continuously operated to move to the near-end limit position of the double-layer linear slideway 21, the push rod 3 drives the elastic sheet 116 to move upwards, so that the limiting device 113 moves upwards, the spring 112 is stretched upwards, and the key 111 of the unlocking device is ensured to rebound to the unlocking mechanism 11, thereby realizing one-time bow expansion; the driving rocker 24 drives the slide bar 22 to fall into the lower slideway and starts to move towards the far end of the handle 2 at the lower slideway, pulls one end of the push rod 3 to move towards the far end of the handle 2, meanwhile, the other end of the push rod 3 pulls the unlocking mechanism 11 to do reverse circular motion along the arc slideway, the included angle between the unlocking mechanism 11 and the push rod 3 is increased, as shown in figure 5, after the sliding rod 22 drives one end of the push rod 3 to pass through the small baffle 23 of the lower layer slideway, the diameter increasing area 31 on the push rod 3 is abutted against the small baffle 23, the end part of the push rod 3 connected with the sliding rod 22 continuously moves along with the sliding rod 22, but the whole rod body is pressed downwards under the jacking action of the small baffle 23, i.e., the other end of the push rod 3 is pressed down, the locker key 111 in the unlocking mechanism 11 has a tendency to pop out downward, and in the process of returning, the next key hole on the spiral expander is tried to be matched, and the next expansion bow is prepared.

From the motion process, the device adopts the crank-slider mechanism, can realize automatic hole entering in the use process, can well avoid the problem that proper angle operation is difficult to find in the operation process due to the small aperture of the key hole of the spiral expander, and simultaneously drives the key 111 of the unlocking device to rebound to the unlocking mechanism 11 through the movement of the slide rod 22 after completing one-time bow expanding operation, thereby reducing the possibility of the convolution of the key hole position and achieving the required bow expanding amount as much as possible; moreover, the hand operation required in the arch expanding process is transferred to the outside of the oral cavity through the integrally formed casing 1 and the handle 2, an operator only needs to sleeve the device on the spiral expander and move the rocker 24 outside the oral cavity, the arch expanding operation is realized, the convenience of the arch expanding operation is improved, the time required in the arch expanding process is shortened, and the possibility of bacterial infection is reduced.

According to the bow-expanding operation process, an operator needs to put the device into the mouth to be fixed with the spiral expander, therefore, the two ends of the bottom of the casing 1 are provided with the positioning holes 15 matched with the diameters of the cross rods on the two sides of the spiral expander, the middle part of the bottom surface is provided with the middle positioning hole 16 capable of being sleeved on the metal shaft adjusting ring in the middle of the spiral expander, the casing 1 is fixed on the spiral expander through the positioning holes 15 and the middle positioning hole 16, the problem that the bow-expanding operation process is difficult to position is solved, and the follow-up bow-expanding operation is convenient to carry out.

In one embodiment, the key 111 is designed as a truncated cone structure, the end surface with a large diameter is fixedly connected in the spring, the end with a small diameter faces the conical pipe opening, when the spring 112 is compressed under pressure, the key 111 is in an activated state, and the end with a small diameter is convenient to enter the keyhole of the lock.

In one embodiment, inward protrusions may be provided at appropriate positions of the two side walls of the taper pipe 117 to define the descending position of the limiting device 113, so as to prevent the limiting device 113 from descending excessively, thereby allowing the lock opener key 111 to be ejected excessively downwards, which may cause the lock opener key 111 to pass through the keyhole, and stab a patient.

In summary, the semicircular helical expander unlocking device provided by the invention adopts the crank-slider mechanism to connect the unlocking mechanism 11, the push rod 3 and the slide rod 22, and the rocker 24 is used to drive the slide rod 22 to move, so that the unlocking mechanism 11 moves, and meanwhile, the unlocking device key 111 is integrated in the unlocking mechanism 11, when the unlocking mechanism 11 slides to the upper part of the key hole, the unlocking device key 111 automatically pops into the key hole, so that the unlocking effect is realized, and when the unlocking device key 111 enters the key hole, the rocker 24 is continuously moved, so that the bow expanding operation is completed.

The above description is only a partial example of the present invention, and does not limit the embodiments and the protection scope of the present invention, therefore, it should be recognized that the present invention is covered by the protection scope of the present invention by the equivalent substitution and obvious change made by the description of the present invention for those skilled in the art.