CN209103586U - A kind of hand-type rectifier assisting piano practice - Google Patents

Abstract

The utility model belongs to piano auxiliary exercise equipment technical field, specially a kind of hand-type rectifier for assisting piano practice, including hand rest and fixed frame, wherein hand rest is mounted on fixed frame, and the fixed frame includes two vertical fixing rods, evacuation strut and sliding rail；Sliding rail mounting base is set in the upper end of evacuation strut, which is arranged sliding sleeve；Sliding sleeve is arranged in the lower part of the hand rest；It is connected by positioning adjustment bar with reinforcing rod between two vertical fixing rods；Lower supporting leg is arranged in the lower part of the vertical fixing rod, and idler wheel is arranged in the lower part of lower supporting leg, and idler wheel can be retracted inside lower supporting leg.The hand rest of the rectifier can be moved flexibly over long distances, met gesture of the people when practicing qin and corrected demand；In addition, the width of the height of hand rest in the rectifier, rectifier can be adjusted, so that the rectifier can satisfy the use demand of various sizes of piano, and the rectifier will not cause to wear to piano in use, be conducive to protect piano.

Description

A kind of hand-type rectifier assisting piano practice

Technical field

The utility model belongs to piano auxiliary exercise equipment technical field, and specially a kind of hand-type for assisting piano practice is rectified Positive device.

Background technique

As people are to the attention in terms of child's intelligence and art, more and more people can allow child to select to practice in the time after school Piano.In addition, for music speciality student in senior middle school and college days, also can be often in contact with piano.Piano is characterized in that Desk-top musical instrument, and key distribution in a row-shaped, this requires play to lift arm and then can just play.However, for Many people, especially beginner, during playing, often will appear arm or wrist it is unconscious move down, retraction, pressure qin Phenomena such as face, malfunction when this is all piano practice on the piano to people totally unfavorable.Therefore to the gesture of player It is corrected, makes the most elementary teaching target to practice on the piano.Currently, people mainly carry out hand-type correction by ancillary equipment, Namely hand-type rectifier.And currently, relatively conventional hand-type rectifier include two fasteners that can be stuck on piano and The drawbacks of cross bar above fastener, is arranged hand rest on cross bar, this rectifier is that guide rail is fixed, and the moving range of hand rest has Limit, that is, people use this rectifier, can only carry out hand-type correction in the range of body front, and for broader model It encloses, people just do not have to correct using rectifier.This makes the rectification effect of existing rectifier not high.In addition, existing rectifier needs It is stuck on piano, in general, piano production is exquisite, it is expensive, piano body can be caused to grind commonly using existing rectifier Damage, influences the overall appearance of piano.In addition to this, the size of piano is different, and existing rectifier cannot be according to various sizes of Piano is adjusted, and keeps the scope of application of rectifier limited.

Summary of the invention

The purpose of this utility model is to provide a kind of pianos that can be adapted for sizes, and levelling thickness range is long, and solid It is fixed good, the hand-type rectifier of the auxiliary piano practice of abrasion will not be caused to piano.

To achieve the above object, the utility model provides the following technical solutions: a kind of hand-type correction assisting piano practice Device, including hand rest and fixed frame, wherein hand rest is mounted on fixed frame, and the fixed frame includes two vertical fixing rods, keeps away Strut and sliding rail is allowed to avoid the top biased forwards of strut, and top wherein the top of vertical fixing rod is arranged in evacuation strut It keeps parallel with vertical fixing rod；In the upper end of evacuation strut, sliding rail mounting base is set, which is arranged sliding sleeve, The sliding rail is mounted in sliding sleeve, and is installed to sliding rail on the sliding sleeve of mounting base into line-locked positioning bolt, is pacified in sliding rail Telescopic shaft is fixedly installed in the lower part for filling seat, which assigns into the inside of evacuation strut, and in the upper side of evacuation strut Positioning bolt is set；Sliding sleeve is arranged in the lower part of the hand rest, and is sleeved on the slide rail by sliding sleeve；The top of the vertical fixing rod Head is pressed in end setting, presses head and is fixed on preload stud upper end, and pre-tightens stud and telescopically assign into vertical fixing rod Top；It is connected by positioning adjustment bar with reinforcing rod between two vertical fixing rods, wherein positioning adjustment bar includes two Fixed thread pipe and a double threaded screw, are arranged handle among double threaded screw, and double threaded screw both ends thread rotary orientation on the contrary, The fixed thread pipe is separately mounted to the both ends of double threaded screw, and the outer end of fixed thread pipe is respectively fixedly connected with vertical fixation Bar；The reinforcing rod is telescoping rod, the plug connector of the fixing piece and middle part that are fixedly installed including two, two fixing pieces with Movable inserting mode grafting is used between plug connector；Lower supporting leg, the lower part of lower supporting leg is arranged in the lower part of the vertical fixing rod Idler wheel is set, sets inner hole in lower supporting leg, and stretching structure is set inside inner hole, which is mounted under the stretching structure End, and idler wheel can be retracted inside lower supporting leg；In the lower part of lower supporting leg, anti-skid washer is set.

In the above-mentioned technical solutions, hand rest is slidably mounted on sliding rail, people during practice, with The movement of hand in left and right directions, hand rest can follow hand mobile, hand made to be bonded hand rest always；In addition, the height of sliding rail can And the width of entire rectifier can be adjusted according to different pianos, be able to use the rectifier and a plurality of pianos. Meanwhile the rectifier is stuck between piano lower part and ground, will not cause to wear to the surface of piano, is conducive to protect outside piano Sight is not damaged.

Preferably, the top setting cross sectional shape of the vertical fixing rod is non-circular pilot hole, in the case where pre-tightening stud The guide pad of end setting and pilot hole cooperation, the guide pad can only move up and down in pilot hole；On the top of vertical fixing rod Rising-falling tone the whole series are set, and the lower part of rising-falling tone the whole series is fixedly connected with vertical fixing rod by positioning bearing, and top is opened up for pre- The screw hole that tight stud passes through.Using the structure, people need to can be only adjusted by rotating rising-falling tone the whole series to head is pressed, Make to press the tight piano in the crown, completes the fixation of the rectifier, in addition, during the adjustment, pre-tightening stud will not rotate, this It can be conducive to protect qin body not frayed to avoid head friction piano body is pressed.

Further, Anti-slip cover, the grain structure of the surface setting protrusion of the Anti-slip cover is arranged in described rising-falling tone the whole series periphery Or vertical strip structure.Setting Anti-slip cover can be conducive to people and rotate rising-falling tone the whole series, so that the rectifier be rapidly completed Fixation and disassembly.

Preferably, reinforcing rod is set between two evacuation struts.Reinforcing rod is used to improve the stability of rectifier entirety, Setting reinforcing rod may further ensure that the relative position between two evacuation struts is stablized between evacuation strut, to guarantee to slide Rail is in straightened condition, to guarantee the sliding fluency of hand rest.

Preferably, the stretching structure being arranged in lower supporting leg includes inner shaft and compressed spring, the compressed spring set In inner shaft, inner shaft lower end connects idler wheel by lower union joint；The snap ring in inner hole inside upper part is arranged, inner shaft upper end pass through interior Snap ring and upper end setting upper limit potential head.Qin is constantly held out against with head is pressed when fastening the rectifier using the structure Body, idler wheel are slowly retracted inner hole, and lower supporting leg is made to hold out against ground；When being not suitable for the rectifier, idler wheel pop-up comes, Ren Menke It is mobile to push the rectifier, make the more convenient to use of the rectifier.

Preferably, end is arranged in one end of the sliding rail, and spliced eye is arranged in the end of the end, is arranged in the end of sliding rail Grafting axis, grafting axis are inserted in spliced eye with manner, and magnetic is fixedly installed respectively in the end face of sliding rail Yu end joint Iron.Hand rest is component easy to wear, and sliding sleeve is then the component for being easy to be blocked by booty, and detachable end is arranged convenient for later period disassembly Sliding rail and hand rest facilitate the maintenance of the rectifier.

Preferably, reference block is set in the rear side of evacuation strut, which protrudes towards the side of vertical fixing rod, and Projecting surface is vertical plane.When fixing the rectifier, it is thus necessary to determine that fixed position, setting reference block can pass through The mode that reference block is aligned before piano is quickly slightly positioned, this not only may insure that vertical fixing rod is vertical, simultaneously Piano surface can be hit to avoid hand rest or evacuation strut, be conducive to protect qin body not damaged.

Preferably, the fixing piece in the reinforcing rod is fixed link, and plug connector is docking pipe sleeve, and fixed link one end is fixed to be connected The rod piece of two sides is connect, the other end is plugged in docking pipe sleeve.The structure can well contentedly reinforcing rod to vertical fixing rod Or the support of evacuation strut, meanwhile, and the function adjustable in pitch of vertical fixing rod can not be influenced.Especially when solid at two When being set with uniformly distributed spring in fixed pole, uniformly distributed spring one end is headed on to the rod piece of two sides, one end heads on the end of docking pipe sleeve, It can guarantee to dock the middle part that pipe sleeve is in fixed link always.

Compared with prior art, the utility model has the beneficial effects that the utility model is novel in design, and it is structurally reasonable, it should The hand rest of rectifier can be moved flexibly over long distances, met gesture of the people when practicing qin and corrected demand；In addition, in the rectifier The height of hand rest, the width of rectifier can be adjusted, so that the use that the rectifier can satisfy various sizes of piano needs It asks, and the rectifier will not cause to wear to piano in use, is conducive to protect piano；In addition, the rectifier structure Stablize, is moved easily, it is very convenient to use.

Detailed description of the invention

The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, this Shen Illustrative embodiments and their description please are not constituted an undue limitation on the present application for explaining the application.

Fig. 1 is the main view of the utility model.

Fig. 2 is the right view of the utility model.

Fig. 3 is the perspective view of the utility model.

Fig. 4 is the mounting structure schematic diagram of the sliding rail of the utility model.

Fig. 5 is the mounting structure schematic diagram of the evacuation strut of the utility model.

Fig. 6 is the mounting structure schematic diagram for pressing head of the utility model.

Fig. 7 is the schematic diagram of internal structure of the lower supporting leg of the utility model.

Fig. 8 is the fractionation structural representation of the extreme of the utility model.

Fig. 9 is the left view that the utility model is in use state.

Figure 10 is the front-side perspective view that the utility model is in use state.

In figure, vertical fixing rod 1, lower supporting leg 2, sliding rail 3, hand rest 4, positioning adjustment bar 5, reinforcing rod 6, sliding rail mounting base 7, Sliding sleeve 8, telescopic shaft 10, presses first 12, rising-falling tone the whole series 13, evacuation strut 14, fixed thread pipe 15, double end spiral shell at positioning bolt 9 Bar 16, fixed link 18, docking pipe sleeve 19, uniformly distributed spring 20, pre-tightens stud 21, guide pad 22, pilot hole 23, positioning at handle 17 Bearing 24, screw hole 25, idler wheel 26, lower union joint 27, inner hole 28, inner shaft 29, compressed spring 30, interior snap ring 31, upper limit potential head 32, Anti-skid washer 33, piano 34, reference block 35, Anti-slip cover 36, grafting axis 37, spliced eye 38, magnet 39, end 40.

Specific embodiment

Presently filed embodiment is described in detail below in conjunction with accompanying drawings and embodiments, how the application is applied whereby Technological means solves technical problem and reaches the realization process of technical effect to fully understand and implement.

Fig. 1-10 is please referred to, the utility model provides a kind of technical solution: a kind of hand-type rectifier assisting piano practice, Including hand rest 4 and fixed frame, wherein hand rest 4 is mounted on fixed frame, and the fixed frame includes two vertical fixing rods 1, keeps away Allow strut 14 and sliding rail 3, wherein the top of vertical fixing rod 1 is arranged in evacuation strut 14, the top for avoiding strut 14 is inclined forward It moves, and top keeps parallel with vertical fixing rod 1；In the upper end of evacuation strut 14, sliding rail mounting base 7, the sliding rail mounting base are set Sliding sleeve 8 is arranged in 7 tops, and the sliding rail 3 is mounted in sliding sleeve 3, and is installed on the sliding sleeve of mounting base 78 and locked to sliding rail 3 Positioning bolt 9, telescopic shaft 10 is fixedly installed in the lower part of sliding rail mounting base 7, which assigns into evacuation strut 14 Inside, and positioning bolt 9 is set in the upper side of evacuation strut 14；Sliding sleeve 8 is arranged in the lower part of the hand rest 4, and passes through cunning Set 8 is sleeved on sliding rail 3；The top setting of the vertical fixing rod 1 presses first 12, presses first 12 and is fixed on preload stud 21 End, and pre-tighten stud 21 and telescopically assign into 1 top of vertical fixing rod；By fixed between two vertical fixing rods Position adjustment bar 5 and reinforcing rod 6 connect, wherein positioning adjustment bar 5 includes two fixed thread pipes 15 and a double threaded screw 16, Handle 17 is set among double threaded screw 16, and the thread rotary orientation at 16 both ends of double threaded screw is on the contrary, the fixed thread pipe 15 is distinguished The both ends of double threaded screw 16 are mounted on, and the outer end of fixed thread pipe 15 is respectively fixedly connected with vertical fixing rod 1；It is avoided at two Reinforcing rod 6 is set between strut 14.Reinforcing rod 6 is used to improve the stability of rectifier entirety, is arranged between evacuation strut 14 Reinforcing rod 6 may further ensure that the relative position between two evacuation struts 14 is stablized, to guarantee that sliding rail 3 is in flat State, to guarantee the sliding fluency of hand rest 4.Fixing piece in the reinforcing rod 6 is fixed link 18, and plug connector is docking pipe sleeve 19,18 one end of fixed link is fixedly connected with the rod piece of two sides, and the other end is plugged in docking pipe sleeve 19.The structure can expire well Support of the foot ground reinforcing rod 6 to vertical fixing rod 1 or evacuation strut 14, meanwhile, and the spacing of vertical fixing rod 1 can not be influenced Adjustable function.Especially when being set with uniformly distributed spring 20 in two fixed links 18, uniformly distributed 20 one end of spring is headed on The rod piece of two sides, one end head on the end of docking pipe sleeve 19, it is ensured that docking pipe sleeve 19 is in the middle part of fixed link 18 always. Lower supporting leg 2 is arranged in the lower part of the vertical fixing rod 1, and the lower part of lower supporting leg 2 is arranged idler wheel 26, sets inner hole 28 in lower supporting leg 2, and Stretching structure is set inside inner hole 28, which is mounted on the lower end of the stretching structure, and idler wheel 26 can be retracted lower branch Inside leg 2；In the lower part of lower supporting leg 2, anti-skid washer 33 is set.

In the above-mentioned technical solutions, hand rest 4 is slidably mounted on sliding rail 3, people during practice, with Set about movement in left and right directions, hand rest 4 can follow hand mobile, hand is made to be bonded hand rest 4 always；In addition, the height of sliding rail 3 Degree can and the width of entire rectifier can be adjusted according to different pianos, be able to use the rectifier and a plurality of steel Qin.Meanwhile the rectifier is stuck between piano lower part and ground, will not cause to wear to the surface of piano, is conducive to protect steel Qin appearance is not damaged.

In this embodiment, the top setting cross sectional shape of the vertical fixing rod 1 is non-circular pilot hole 23, pre- The guide pad 22 that tight 21 lower end of stud setting cooperates with pilot hole 23, the guide pad 22 can only move up and down in pilot hole 23； Rising-falling tone the whole series 13 are set on the top of vertical fixing rod 1, the lower part of the rising-falling tone the whole series 13 connects by the way that positioning bearing 24 is fixed Vertical fixing rod 1 is connect, top opens up the screw hole 25 passed through for pre-tightening stud 21.Using the structure, people need to only be risen by rotation Falling tone the whole series 13 can be adjusted to pressing first 12, made to press first 12 and held out against piano, and the fixation of the rectifier is completed, this Outside, during the adjustment, pre-tightening stud 21 will not rotate, this can be conducive to avoid first 12 friction piano body is pressed Protect qin body not frayed.Anti-slip cover 36 is arranged in a whole set of 13 peripheries of the rising-falling tone, the surface setting protrusion of the Anti-slip cover 36 Grain structure or vertical strip structure.Setting Anti-slip cover 36 can be conducive to people and rotate rising-falling tone the whole series 13, thus quickly Complete the fixation and disassembly of the rectifier.

In addition, the stretching structure being arranged in lower supporting leg 2 includes inner shaft 29 and compressed spring 30, the compressed spring 30 sets in inner shaft 29,29 lower end of inner shaft by lower union joint 27 connect idler wheel 26；The snap ring in 28 inside upper part of inner hole is arranged 31,29 upper end of inner shaft passes through interior snap ring 31 and upper limit potential head 32 is arranged in upper end.Using the structure, fasten the rectifier when It waits, constantly holds out against qin body with pressing first 12, idler wheel 26 is slowly retracted inner hole 28, and lower supporting leg 2 is made to hold out against ground；It is somebody's turn to do using to use When rectifier, the pop-up of idler wheel 26 comes, and people can push rectifier movement, makes the more convenient to use of the rectifier.

Preferably, end 40 is arranged in one end of the sliding rail 3, and spliced eye 38 is arranged in the end of the end 40, in sliding rail 3 Grafting axis 37 is arranged in end, and grafting axis 37 is inserted in spliced eye 38 with manner, and at the end of sliding rail 3 and 40 joint of end Magnet 39 is fixedly installed in face respectively.Hand rest 4 is component easy to wear, and for sliding sleeve 8 then to be easy the component blocked by booty, setting can It dismantles end 40 and is convenient for later period disassembly sliding track 3 and hand rest 4, facilitate the maintenance of the rectifier.

Preferably, reference block 35 is set in the rear side of evacuation strut 14, the reference block 35 is towards the side of vertical fixing rod 1 Protrusion, and projecting surface is vertical plane.When fixing the rectifier, it is thus necessary to determine that reference block is arranged in fixed position 35 quickly can slightly be positioned by the way that reference block 35 to be aligned to the mode before piano, this not only may insure vertical fixation Bar 1 is vertical, while can hit piano surface to avoid hand rest 4 or evacuation strut 14, is conducive to protect qin body not damaged.

Working principle: in the state of not the using of the rectifier, idler wheel 26 pops up lower supporting leg 2, so that idler wheel 2 lands, people Can be convenient the mobile rectifier；When in use, mobile rectifier presses first 12 to the front of piano 34, appropriate lower, Make to press first 12 lower than piano bottom surface, reference block 35 is then directed at the panel of 34 front of piano and reference block 35 is made to be adjacent to steel Qin, then hand steered rectifier, slowly up-regulation presses first 12 on the other hand, makes to press first 12 and heads on qin body bottom surface, to rectifier Carry out tentatively fixed, then both hands rotate rising-falling tone the whole series 13 simultaneously, make to press first 12 and constantly hold out against qin body bottom surface, until idler wheel 26 are retracted inside lower supporting leg 2, just complete the fixation of rectifier, then loosen the positioning bolt 9 on evacuation 14 top of strut again, adjust The height of whole hand rest 4 fastens the positioning bolt 9 after adjustment, complete the fixation of rectifier entirety；During the installation process, it needs pair When the width of rectifier is adjusted, the positioning bolt 9 in sliding rail mounting base 7 is loosened first, then rotational handle 17, in double end Under the cooperation of screw rod 16 and fixed thread pipe 15,1 constant speed of vertical fixing rod is moved backward, at this time fixed link 18 and docking pipe sleeve 19 Between also relatively move, this is adjusted the lateral dimension of the rectifier；Certainly, in the effect of uniformly distributed spring 20 Under, docking pipe sleeve 19 can be in the middle part of two fixed links 18 always, realize the stress equalization of fixed link 18；It is horizontal to complete rectifier To after the adjustment of size, shifting sledge 3 makes sliding rail 3 be positioned evenly over rectifier top, then fixed by positioning bolt 9 Sliding rail 3, just than the integrated regulation of completion rectifier；When disassembly, rising-falling tone the whole series 13 only need to be rotated backward, make to press head at leisure 12 are detached from qin body, and idler wheel 26 can be stretched slowly at this time, and people can push the rectifier and leave, very convenient.

The utility model devises a kind of hand-type rectifier for assisting piano practice, and the hand rest of the rectifier can be over long distances It is flexibly mobile, meet gesture of the people when practicing qin and corrects demand；In addition, the width of the height of hand rest in the rectifier, rectifier Degree can be adjusted, so that the rectifier can satisfy the use demand of various sizes of piano.The utility model is novel in design, It is structurally reasonable, and the rectifier will not cause to wear to piano in use, be conducive to protect piano；In addition, the correction Device stable structure, is moved easily, very convenient to use.

As used some vocabulary to censure specific components in the specification and claims.Those skilled in the art answer It is understood that hardware manufacturer may call the same component with different nouns.This specification and claims are not with name The difference of title is as the mode for distinguishing component, but with the difference of component functionally as the criterion of differentiation.Such as logical The "comprising" of piece specification and claim mentioned in is an open language, therefore should be construed to " include but do not limit In "." substantially " refer within the acceptable error range, those skilled in the art can within a certain error range solve described in Technical problem basically reaches the technical effect.In addition, " coupling " word includes any direct and indirect electric property coupling herein Means.Therefore, if it is described herein that a first device is coupled to a second device, then representing the first device can directly electrical coupling It is connected to the second device, or the second device indirectly electrically coupled through other devices or coupling means.Specification Subsequent descriptions be implement the application better embodiment, so it is described description be for the purpose of the rule for illustrating the application, It is not intended to limit the scope of the present application.The protection scope of the application is as defined by the appended claims.

It should be noted that the terms "include", "comprise" or its any other variant are intended to the packet of nonexcludability Contain, so that commodity or system including a series of elements not only include those elements, but also including not arranging clearly Other element out, or further include for this commodity or the intrinsic element of system.The case where not limiting more Under, the element that is limited by sentence "including a ...", it is not excluded that also deposited in the commodity or system for including the element In other identical element.

Several preferred embodiments of the present invention have shown and described in above description, but as previously described, it should be understood that this Utility model is not limited to forms disclosed herein, and should not be regarded as an exclusion of other examples, and can be used for various Other combinations, modification and environment, and above-mentioned introduction or related fields can be passed through within the scope of the inventive concept described herein Technology or knowledge be modified.And changes and modifications made by those skilled in the art do not depart from the spirit and model of the utility model It encloses, then it all should be in the protection scope of the appended claims for the utility model.

Claims (9)

1. a kind of hand-type rectifier for assisting piano practice, including hand rest and fixed frame, wherein hand rest is mounted on fixed frame, It is characterized by: the fixed frame includes two vertical fixing rods, evacuation strut and sliding rail, wherein evacuation strut is arranged vertical The top of fixed link avoids the top biased forwards of strut, and top and vertical fixing rod keeping parallelism；In the upper of evacuation strut Sliding sleeve is arranged in end setting sliding rail mounting base, the sliding rail mounting base top, and the sliding rail is mounted in sliding sleeve, and in the cunning of mounting base Installation is put on to sliding rail into line-locked positioning bolt, telescopic shaft, telescopic shaft peace is fixedly installed in the lower part of sliding rail mounting base It is inserted in the inside of evacuation strut, and positioning bolt is set in the upper side of evacuation strut；Sliding sleeve is arranged in the lower part of the hand rest, And it is sleeved on the slide rail by sliding sleeve；Head is pressed in the top setting of the vertical fixing rod, presses head and is fixed on preload stud End, and pre-tighten stud and telescopically assign at the top of vertical fixing rod；Pass through positioning between two vertical fixing rods Adjustment bar is connected with reinforcing rod, wherein positioning adjustment bar includes two fixed thread pipes and a double threaded screw, in double threaded screw Centre setting handle, and the thread rotary orientation at double threaded screw both ends is on the contrary, the fixed thread pipe is separately mounted to double threaded screw Both ends, and the outer end of fixed thread pipe is respectively fixedly connected with vertical fixing rod；The reinforcing rod is telescoping rod, including two are consolidated Surely the plug connector of the fixing piece and middle part that are arranged, two use movable inserting mode grafting between fixing piece and plug connector； Lower supporting leg is arranged in the lower part of the vertical fixing rod, and the lower part of lower supporting leg is arranged idler wheel, sets inner hole in lower supporting leg, and in inner hole Stretching structure is arranged in portion, which is mounted on the lower end of the stretching structure, and idler wheel can be retracted inside lower supporting leg；In lower supporting leg Lower part be arranged anti-skid washer.

2. a kind of hand-type rectifier for assisting piano practice as described in claim 1, it is characterised in that: the vertical fixing rod Top setting cross sectional shape be non-circular pilot hole, pre-tighten stud lower end setting with pilot hole cooperation guide pad, should Guide pad can only move up and down in pilot hole；On the top of vertical fixing rod, setting rising-falling tone is a whole set of, rising-falling tone the whole series Lower part is fixedly connected with vertical fixing rod by positioning bearing, and top opens up the screw hole passed through for pre-tightening stud.

3. a kind of hand-type rectifier for assisting piano practice as claimed in claim 2, it is characterised in that: the rising-falling tone is a whole set of Anti-slip cover, the grain structure or vertical strip structure of the surface setting protrusion of the Anti-slip cover is arranged in periphery.

4. a kind of hand-type rectifier for assisting piano practice as described in claim 1, it is characterised in that: in two evacuation struts Between reinforcing rod is set.

5. a kind of hand-type rectifier for assisting piano practice as described in claim 1, it is characterised in that: described to be arranged in lower branch Stretching structure in leg includes inner shaft and compressed spring, and the compressed spring covers in inner shaft, and inner shaft lower end passes through lower union joint Connect idler wheel；The snap ring in inner hole inside upper part is arranged, inner shaft upper end passes through interior snap ring and upper limit potential head is arranged in upper end.

6. a kind of hand-type rectifier for assisting piano practice as described in claim 1, it is characterised in that: one end of the sliding rail End is set, and spliced eye is arranged in the end of the end, grafting axis is arranged in the end of sliding rail, grafting axis is inserted in slotting with manner It connects in hole, and magnet is fixedly installed respectively in the end face of sliding rail Yu end joint.

7. a kind of hand-type rectifier for assisting piano practice as described in claim 1, it is characterised in that: after avoiding strut Reference block is arranged in side, which protrudes towards the side of vertical fixing rod, and projecting surface is vertical plane.

8. a kind of hand-type rectifier of auxiliary piano practice as described in any one of claims 1 to 7 claim, feature Be: the fixing piece in the reinforcing rod is fixed link, and plug connector is docking pipe sleeve, and fixed link one end is fixedly connected with the bar of two sides Part, the other end are plugged in docking pipe sleeve.

9. a kind of hand-type rectifier for assisting piano practice as claimed in claim 8, it is characterised in that: in two fixed links It is set with uniformly distributed spring, which heads on the rod piece of two sides, and one end heads on the end of docking pipe sleeve.