阅读说明：本技术 一种便携冰刀更换辅助装置 (Auxiliary device is changed to portable skates ) 是由 杨金田 张卫 贾文彤 董中奇 郭希军 曾文献 于 2021-08-31 设计创作，主要内容包括：本发明提供了一种便携冰刀更换辅助装置,属于体育器械技术领域。本发明提供的一种便携冰刀更换辅助装置,包括：箱体、冰刀放置调节组件、冰鞋放置组件以及支撑组件,冰刀放置调节组件包括冰刀调节架以及冰刀放置架,冰刀调节架上设置有角度调节组件；冰鞋放置组件包括冰鞋放置架、冰鞋位置调节组件以及冰鞋夹紧组件；支撑组件包括多组用于支撑冰刀放置调节组件或者冰鞋放置组件的支撑杆及连接杆。本发明提供的一种便携冰刀更换辅助装置,结构简单,使用简便易行,可以快速的进行冰刀的更换,节省时间,提高冰刀更换效率,易于推广。(The invention provides a portable ice skate blade replacement auxiliary device, and belongs to the technical field of sports equipment. The invention provides a portable ice skate blade replacement auxiliary device, which comprises: the ice skate comprises a box body, an ice skate placing and adjusting assembly, an ice skate placing assembly and a supporting assembly, wherein the ice skate placing and adjusting assembly comprises an ice skate adjusting frame and an ice skate placing frame, and an angle adjusting assembly is arranged on the ice skate adjusting frame; the skate placing assembly comprises a skate placing frame, a skate position adjusting assembly and a skate clamping assembly; the supporting component comprises a plurality of groups of supporting rods and connecting rods, wherein the supporting rods are used for supporting the ice skate placing and adjusting component or the ice skate placing component. The portable ice skate blade replacement auxiliary device provided by the invention is simple in structure, simple and easy to use, can be used for rapidly replacing an ice skate blade, saves time, improves the replacement efficiency of the ice skate blade, and is easy to popularize.)

1. A portable skate blade replacement assistance apparatus comprising:

the box body comprises a first half box and a second half box which can be closed and locked;

the ice skate placing and adjusting assembly comprises an ice skate adjusting frame and an ice skate placing frame arranged on the axis of the ice skate adjusting frame, and an angle adjusting assembly capable of adjusting the angle of the ice skate placing frame is arranged on the ice skate adjusting frame;

the skate placing assembly comprises a skate placing frame, skate position adjusting assemblies arranged on the skate placing frame and skate clamping assemblies arranged between the skate position adjusting assemblies; and

the supporting component comprises a plurality of groups of supporting rods for supporting the ice skate placing and adjusting component or the ice skate placing component and connecting rods for connecting the ice skate placing and adjusting component and the ice skate placing component.

2. The portable ice skate blade replacement assisting device of claim 1, wherein the ice skate blade adjusting frame comprises two sets of oppositely arranged connecting frames and two sets of oppositely arranged arc frames, the connecting frames are sequentially connected with the arc frames end to end, the arc frames are symmetrically arranged, and each arc frame has a radian protruding outwards.

3. The portable ice skate blade replacement assisting device as claimed in claim 2, wherein an angle adjusting groove is formed in the arc-shaped frame along the arc direction, sliding blocks capable of sliding in the angle adjusting groove are arranged at two ends of the ice skate blade placing frame, an ice skate blade frame locking device is arranged at one end of the ice skate blade placing frame, and angle scales are arranged on the upper end face of the arc-shaped frame.

4. The portable skates replacing assisting device according to claim 3, wherein a limiting frame is arranged between two sets of opposite connecting frames, the limiting frame is arranged at the central position of the connecting frames, a limiting post is arranged at the central position of the limiting frame, a limiting groove capable of accommodating the limiting post is arranged on the lower end face of the skates placing frame, and the skates placing frame is rotatably connected with the limiting post.

5. The portable skates replacing assisting device according to claim 1, wherein skates grooves for placing skates are arranged on the skates placing frame, skates limiting assemblies capable of limiting the positions of the skates are arranged in the skates grooves, the skates limiting assemblies are arranged in two groups and are respectively slidably arranged at two ends of the skates grooves, and length scales are arranged on one side of each skate groove.

6. The portable skates replacing auxiliary device according to claim 1, wherein the skates placing rack comprises two sets of first placing racks arranged oppositely and two sets of second placing racks arranged oppositely, the first placing racks are connected with the second placing racks in sequence, the side walls of the second placing racks are provided with position adjusting grooves, the skates position adjusting assembly comprises two sets of position adjusting rods arranged oppositely, two ends of each position adjusting rod are slidably arranged in the corresponding position adjusting groove, and the upper end surface of each second placing rack is provided with length scales.

7. The portable ice skate blade replacement assisting device of claim 6, wherein a position adjusting screw is arranged outside the second placing rack, and the position adjusting screw is rotatably arranged between the two sets of the first placing racks and is in threaded connection with one end of the position adjusting rod.

8. The portable skate blade replacement assistance of claim 7 wherein the skate clamp assembly comprises a toe clamp and a heel clamp oppositely disposed on the position adjustment lever, the toe clamp and the heel clamp having a resilient restraining cord disposed therebetween.

9. The portable ice skate blade replacement assisting device of claim 8, wherein a limiting block is arranged on one side of the position adjusting rod, which is in contact with the position adjusting groove, and a limiting groove capable of accommodating the limiting block is arranged on the inner wall of the position adjusting groove.

10. The portable skate blade replacement assisting device of claim 1, wherein the support rod is detachably arranged between the first half box and the skate blade adjusting frame, the support rod is detachably arranged between the second half box and the skate placing frame, and the connecting rod is detachably arranged between the skate blade adjusting frame and the skate placing frame.

Technical Field

The invention belongs to the technical field of sports equipment, and particularly relates to a portable ice skate blade replacement auxiliary device.

Background

Skating has attracted more and more ginseng and wherein as an on-ice motion, the skates are then indispensable sport equipment in the skating motion, the skating motion generally divide into speed skating and style skating, different skating motion has had different requirements to the skates, mainly reflect the difference at the skates and the difference of skates position angle, the skates is as the consumer, inevitable wearing and tearing can take place in the use and even damage, need in time change the skates, but at the skates change in-process, need the use tools, and need carry on spacingly to skates and skates, it is comparatively loaded down with trivial details to operate, should not adjust the skates angle, change the inefficiency ratio.

Disclosure of Invention

The invention aims to provide a portable ice skate blade replacement auxiliary device, and aims to solve the problems that an ice skate blade is not easy to replace and the angle is not easy to adjust.

In order to achieve the purpose, the invention adopts the technical scheme that: provided is a portable ice blade replacement assistance device including: the box body comprises a first half box and a second half box which can be closed and locked;

the ice skate placing and adjusting assembly comprises an ice skate adjusting frame and an ice skate placing frame arranged on the axis of the ice skate adjusting frame, and an angle adjusting assembly capable of adjusting the angle of the ice skate placing frame is arranged on the ice skate adjusting frame;

the skate placing assembly comprises a skate placing frame, skate position adjusting assemblies arranged on the skate placing frame and skate clamping assemblies arranged between the skate position adjusting assemblies; and

the supporting component comprises a plurality of groups of supporting rods for supporting the ice skate placing and adjusting component or the ice skate placing component and connecting rods for connecting the ice skate placing and adjusting component and the ice skate placing component.

In a possible implementation mode, the skate alignment jig includes link and arc frame, the link is including two sets of relative setting, the arc frame is including two sets of relative settings, the link with the arc frame is end to end in order, the arc frame symmetry sets up, just the arc frame has the convex radian in outside.

In a possible implementation mode, an angle adjusting groove along the arc direction is formed in the arc frame, sliding blocks capable of sliding in the angle adjusting groove are arranged at two ends of the ice skate blade placing frame, an ice skate blade frame locking device is arranged at one end of the ice skate blade placing frame, and angle scales are arranged on the upper end face of the arc frame.

In a possible implementation mode, two sets of opposite connecting frames are provided with limiting frames, the limiting frames are arranged at the central positions of the connecting frames, limiting columns are arranged at the central positions of the limiting frames, limiting grooves capable of containing the limiting columns are formed in the lower end faces of the ice skate placing frames, and the ice skate placing frames are rotatably connected with the limiting columns.

In a possible implementation manner, an ice skate groove for placing an ice skate is formed in the ice skate placing frame, ice skate limiting assemblies capable of limiting the position of the ice skate are arranged in the ice skate groove, the ice skate limiting assemblies are provided with two groups and are arranged at two ends of the ice skate groove in a sliding mode respectively, and length scales are arranged on one side of the ice skate groove.

In a possible implementation mode, the skate placing rack comprises two sets of first placing racks which are arranged oppositely and two sets of second placing racks which are arranged oppositely, the first placing racks are sequentially connected with the second placing racks, position adjusting grooves are formed in the side walls of the second placing racks, the skate position adjusting assemblies comprise two sets of position adjusting rods which are arranged oppositely, two ends of each position adjusting rod are slidably arranged in the corresponding position adjusting groove, and length scales are arranged on the upper end face of each second placing rack.

In a possible implementation manner, a position adjusting screw is arranged outside the second placing rack, and the position adjusting screw is rotatably arranged between the two sets of first placing racks and is in threaded connection with one end of the position adjusting rod.

In one possible implementation manner, the skate clamping assembly comprises a toe clamping piece and a heel clamping piece which are oppositely arranged on the position adjusting rod, and an elastic limiting rope is arranged between the toe clamping piece and the heel clamping piece.

In a possible implementation manner, a limiting block is arranged on one side of the position adjusting rod, which is in contact with the position adjusting groove, and a limiting groove capable of accommodating the limiting block is arranged on the inner wall of the position adjusting groove.

In a possible implementation mode, the supporting rod is detachably arranged between the first half box and the skate blade adjusting frame, the supporting rod is detachably arranged between the second half box and the skate placing frame, and the connecting rod is detachably arranged between the skate blade adjusting frame and the skate placing frame.

The portable ice skate blade replacement auxiliary device provided by the invention has the beneficial effects that:

compared with the prior art, the device comprises the box body, is convenient to store and easy to carry, can provide a stable mounting platform, and improves the use stability of the device; the ice skate placing and adjusting assembly comprises an ice skate adjusting frame and an ice skate placing frame, the ice skate can be placed on the ice skate placing frame to limit the ice skate, and the angle of the ice skate placing frame can be adjusted by the ice skate adjusting frame; the ice skate positioning device is provided with an ice skate placing assembly, wherein the ice skate placing assembly comprises an ice skate placing frame, an ice skate position adjusting assembly and an ice skate clamping assembly; the supporting component is arranged and comprises a plurality of groups of supporting rods and connecting rods, the supporting rods can be arranged on the first half box, the second half box, the ice skate adjusting frame and the ice skate placing frame and used for supporting the ice skate adjusting frame or the ice skate placing frame on the first half box or the second half box, meanwhile, the connecting rods can be connected with the ice skate adjusting frame and the ice skate placing frame to position the ice skate and the ice skate, and the ice skate is convenient to install.

Drawings

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

Fig. 1 is a schematic structural diagram of a portable ice skate blade replacement auxiliary device according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an angle indicator block according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a locking device for a iceblade holder employed in an embodiment of the present invention.

In the figure: 1. a first half-tank; 2. a second half-tank; 3. placing a skate rack; 4. a tool holder; 5. a screw placement platform; 6. a connecting frame; 7. an arc-shaped frame; 8. a slider; 9. an angle observation groove; 10. an angle pointer block; 11. an ice skate blade frame locking block; 12. the ice skate blade frame locking bolt; 13. a limiting frame; 14. a cutter groove; 15. an ice skate limiting block; 16. a runner locking bolt; 17. a first placing rack; 18. a second rack; 19. a position adjusting rod; 20. a position adjusting screw; 21. a toe clip; 22. a heel clamp; 23. an elastic limiting rope.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, a description will now be given of an embodiment of a portable ice skate replacement assisting device provided by the present invention, including: the ice skate comprises a box body, an ice skate placing and adjusting assembly, an ice skate placing assembly and a supporting assembly, wherein the box body comprises a first half box 1 and a second half box 2 which can be closed and locked; the ice skate placing and adjusting assembly comprises an ice skate adjusting frame and an ice skate placing frame 3 arranged on the axis of the ice skate adjusting frame, and an angle adjusting assembly capable of adjusting the angle of the ice skate placing frame 3 is arranged on the ice skate adjusting frame; the skate placing assembly comprises a skate placing frame, skate position adjusting assemblies arranged on the skate placing frame and skate clamping assemblies arranged between the skate position adjusting assemblies; the supporting component comprises a plurality of groups of supporting rods for supporting the ice skate placing and adjusting component or the ice skate placing component, and a connecting rod for connecting the ice skate placing and adjusting component and the ice skate placing component.

Compared with the prior art, the portable ice skate blade replacement auxiliary device provided by the invention comprises the box body, is convenient to store and easy to carry, can provide a stable mounting platform, and improves the use stability of the device; the ice skate placing and adjusting assembly comprises an ice skate adjusting frame and an ice skate placing frame 3, the ice skate can be placed on the ice skate placing frame 3 to limit the ice skate, and the angle of the ice skate placing frame 3 can be adjusted by the ice skate adjusting frame; the ice skate positioning device is provided with an ice skate placing assembly, wherein the ice skate placing assembly comprises an ice skate placing frame, an ice skate position adjusting assembly and an ice skate clamping assembly; be provided with supporting component, including multiunit bracing piece and connecting rod, the bracing piece can set up on first half case 1, half case 2 of second, skates alignment jig and skates rack for support skates alignment jig or skates rack on first half case 1 or half case 2 of second, connecting rod can connect skates alignment jig and skates rack simultaneously, carry out the location of skates and skates, be convenient for carry out the installation of skates.

Specifically, referring to fig. 1, the device comprises a box body, a skate placing and adjusting assembly, a skate placing assembly and a supporting assembly, wherein the box body comprises a first half box 1 and a second half box 2, the first half box 1 and the second half box 2 are completely closed and can be locked, and the skate placing and adjusting assembly, the skate placing assembly, the supporting assembly, other mounting tools and skates can be placed in the box body, so that the carrying is convenient; the ice skate is placed on the ice skate placing frame 3, and the angle of the ice skate placing frame 3 arranged on the ice skate adjusting frame is adjusted by the ice skate adjusting frame, so that the ice skate is convenient to mount; the skate position adjusting assembly adjusts the position of the skate clamping assembly, the skates are placed in the skate clamping assembly, the skates are limited, and the mounting surface of the skate blade faces upwards; according to different ice skate mounting modes, the ice skate placing and adjusting assembly and the ice skate placing assembly are supported by the supporting assembly.

Furthermore, when the ice skate blade needs to be locked from the inside of the ice skate, the supporting rod supports the ice skate blade placement adjusting assembly in the first box body, and the connecting rod supports the ice skate blade placement adjusting assembly on the ice skate blade placement adjusting assembly, so that the ice skate blade is convenient to mount; when the skates need be locked from the outside of the skates sole, the supporting rod supports the skates placing component in the second box body, and the connecting rod supports the skates placing and adjusting component on the skates placing component, so that the skates can be conveniently installed.

Further, the ice skate is placed between adjusting part, skates and is placed subassembly and the supporting component and can carry out the dismouting, can accomodate into in the box when need not to use, increases the convenience that the device used.

Further, be provided with the tool rest 4 that is used for placing mounting tool in the box, be provided with screw place the platform 5 on the tool rest 4, the material can be inhaled for magnetism to 5 bottom surfaces of screw place the platform, avoids placing the screw on screw place the platform 5 and drops.

As a specific embodiment of the portable ice skate blade replacement auxiliary device provided by the present invention, referring to fig. 1, the ice skate blade adjusting frame includes two sets of oppositely disposed connecting frames 6 and two sets of oppositely disposed arc frames 7, the connecting frames 6 and the arc frames 7 are sequentially connected end to end, the arc frames 7 are symmetrically disposed, and the arc frames 7 have an outwardly protruding arc.

Specifically, please refer to fig. 1, the ice skate blade adjusting frame includes a connecting frame 6 and an arc frame 7, the two sets of connecting frames 6 are symmetrically arranged, the two sets of arc frames 7 are symmetrically arranged, the connecting frame 6 is connected with the arc frame 7, the ice skate blade adjusting frame is a square frame, and the arc frame 7 protrudes to the outer side of the ice skate blade adjusting frame, so as to adjust the angle of the ice skate blade.

As a specific embodiment of the portable ice skate blade replacement auxiliary device provided by the present invention, referring to fig. 1 to 3, an angle adjusting groove along an arc direction is provided on an arc-shaped frame 7, sliding blocks 8 capable of sliding in the angle adjusting groove are provided at both ends of an ice skate blade placing frame 3, an ice skate blade frame locking device is provided at one end of the ice skate blade placing frame 3, and an angle scale is provided on an upper end surface of the arc-shaped frame 7.

Specifically, referring to fig. 1 to 3, an angle adjusting groove is formed in the arc-shaped frame 7, sliding blocks 8 are arranged at two ends of the skate blade placing frame 3, the sliding blocks 8 can slide in the angle adjusting groove, the skate blade placing frame 3 is locked on the arc-shaped frame 7 by the skate blade placing frame locking device, an angle scale is arranged on one side of the angle adjusting groove, so that the angle of deflection can be conveniently determined, and the skate blade can be easily installed.

Further, 7 up ends of arc frame are provided with angle observation groove 9, and angle observation groove 9 is unanimous with 7 radians of arc frame, and 8 up ends of sliding block of the skates rack 3 other end are provided with angle pointer piece 10, and the angle scale setting is in one side of angle observation groove 9, and the directional angle scale of angle pointer piece 10 is convenient for carry out reading of angle.

Further, the center of the angle scale is defined as 0 degree, and the angle scale is increased along with the increase of the angle deviated from the center, so that the angle reading is convenient.

Further, one end of the ice skate blade placing frame 3 penetrates through the arc-shaped frame 7, an ice skate blade frame locking block 11 is arranged on the upper end face of one end, located on the outer side of the arc-shaped frame 7, of the ice skate blade frame, an ice skate blade frame locking bolt 12 is arranged on the locking block, and the ice skate blade placing frame 3 and the arc-shaped frame 7 are locked after penetrating through the ice skate blade frame locking block 11.

As a specific embodiment of the portable ice skate blade replacement auxiliary device provided by the present invention, referring to fig. 1, a limiting frame 13 is disposed between two sets of opposite connecting frames 6, the limiting frame 13 is disposed at the center of the connecting frames 6, a limiting post is disposed at the center of the limiting frame 13, a limiting groove capable of accommodating the limiting post is disposed on the lower end surface of the ice skate blade placing frame 3, and the ice skate blade placing frame 3 is rotatably connected to the limiting post.

Specifically, please refer to fig. 1, the limiting frame 13 is disposed between the connecting frames 6, the limiting frame 13 is perpendicular to the connecting frames 6, the limiting frame 13 is disposed in the middle of the connecting frames 6, the connecting frames 6 are equally divided, the limiting frame 13 is provided with a limiting post in the center, the center of the lower end face of the skate blade placing frame 3 is provided with a limiting groove, and the limiting post and the limiting groove are matched to limit the skate blade placing frame 3, so that the stability of the device is improved.

Referring to fig. 1 to 3, an ice skate slot 14 for placing an ice skate is disposed on an ice skate rack 3, an ice skate limiting component capable of limiting the position of the ice skate is disposed in the ice skate slot 14, two sets of the ice skate limiting components are disposed and slidably disposed at two ends of the ice skate slot 14, and a length scale is disposed on one side of the ice skate slot 14.

Specifically, referring to fig. 1 to 3, the skates are placed in the skates grooves 14, and two ends of the skates grooves 14 are provided with skate limiting assemblies, the skate limiting assemblies can slide in the skates grooves 14, and according to length scales arranged on one side of the skates grooves 14, the center of the skates can be ensured to be located at the center of the skates grooves 14, so that the positioning and installation of the skates are facilitated.

Further, the length scale is 0 cm at the center of the ice skate groove 14, and the scale value is gradually increased along with the distance from the center.

Further, the skates limiting component is a skates limiting block 15 capable of sliding in the skates groove 14, the skates limiting block 15 is a T-shaped block, a skate locking bolt 16 is arranged above the skates placing frame 3 on the upper portion of the skates limiting block 15, and the skates locking block can be locked on the skates placing frame 3.

As a specific embodiment of the portable ice skate blade replacement assisting device provided by the present invention, referring to fig. 1, the ice skate holding frame comprises two sets of first holding frames 17 arranged oppositely and two sets of second holding frames 18 arranged oppositely, the first holding frames 17 are sequentially connected to the second holding frames 18, a position adjusting groove is formed on a side wall of the second holding frame 18, the ice skate position adjusting assembly comprises two sets of position adjusting rods 19 arranged oppositely, two ends of each position adjusting rod 19 are slidably arranged in the position adjusting groove, and length scales are arranged on an upper end surface of the second holding frame 18.

Specifically, referring to fig. 1, the skate holding frame includes a first holding frame 17, a second holding frame 18 and a position adjusting rod 19, the position adjusting groove is disposed on the opposite side of the second holding frame 18, two ends of the position adjusting rod 19 are slidably disposed in the position adjusting groove, the position adjusting rod 19 can slide along the direction of the second holding frame 18, and the length scale is disposed on the upper end face of the second holding frame 18, so as to facilitate positioning of skates.

Furthermore, the length scale is 0 cm at the central position of the second placing frame 18, and the scale value is gradually increased along with the distance from the central position, so that the positioning of the skates is facilitated.

As a specific embodiment of the portable ice skate blade replacement auxiliary device provided by the present invention, referring to fig. 1, a position adjusting screw 20 is disposed outside the second rack 18, and the position adjusting screw 20 is rotatably disposed between the two sets of first racks 17 and is in threaded connection with one end of the position adjusting rod 19.

Specifically, referring to fig. 3, the position adjusting screw 20 is disposed outside and parallel to the second rack 18, the position adjusting screw 20 is vertically disposed between the two sets of first racks 17 and rotatably connected to the first racks 17, the position adjusting screw 20 is in threaded connection with one end of the position adjusting rod 19, and the positions of the two sets of position adjusting rods 19 can be adjusted by rotating the position adjusting screw 20, so as to facilitate positioning of the skates.

Referring to fig. 1, the skate clamping assembly includes a toe clamping member 21 and a heel clamping member 22 oppositely disposed on a position adjustment lever 19, and an elastic limiting rope 23 is disposed between the toe clamping member 21 and the heel clamping member 22.

Specifically, referring to fig. 1, the toe clip 21 and the heel clip 22 are oppositely disposed on the position adjustment rod 19, and the elastic limiting rope 23 is disposed between the toe clip 21 and the heel clip 22 and disposed on two sides of the toe clip 21 and the heel clip 22, so as to limit the skate.

As a specific embodiment of the portable ice skate blade replacement auxiliary device provided by the present invention, a limiting block is disposed on a side of the position adjusting rod 19 contacting the position adjusting groove, and a limiting groove capable of accommodating the limiting block is disposed on an inner wall of the position adjusting groove.

Specifically, be provided with the stopper between position control pole 19 and the position control groove, the cooperation sets up the spacing groove at position control inslot wall, increases gliding stability.

As a specific implementation mode of the portable ice skate blade replacement auxiliary device provided by the invention, the supporting rod is detachably arranged between the first half box 1 and the ice skate blade adjusting frame, the supporting rod is detachably arranged between the second half box 2 and the ice skate placing frame, and the connecting rod is detachably arranged between the ice skate blade adjusting frame and the ice skate placing frame.

Specifically, the bracing piece can support the skates alignment jig in first half incasement 1, and the bracing piece can support the skates rack between half incasement 2 of second, and skates alignment jig and skates rack are connected to the connecting rod, increase the stability of device.

Further, the bottom of the first half box 1 and the second half box 2 is provided with a support column, and the support holes of the first half box 1 and the second half box 2 are arranged on the support column, so that the stability of the device is improved.

Furthermore, the ice skate blade adjusting frame and the connecting rod are telescopic rod pieces, so that the adaptability of the device is improved.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.