CN109998278A - A kind of portable spool music easel - Google Patents
A kind of portable spool music easel Download PDFInfo
- Publication number
- CN109998278A CN109998278A CN201910390337.0A CN201910390337A CN109998278A CN 109998278 A CN109998278 A CN 109998278A CN 201910390337 A CN201910390337 A CN 201910390337A CN 109998278 A CN109998278 A CN 109998278A
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- stepper motor
- page turning
- friction pulley
- roll shaft
- panel
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- 238000007514 turning Methods 0.000 claims abstract description 97
- 244000309464 bull Species 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000005096 rolling process Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 2
- 230000007306 turnover Effects 0.000 abstract description 3
- 230000001360 synchronised effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002146 bilateral effect Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B19/00—Reading-desks; Lecterns; Pulpits, i.e. free-standing
- A47B19/002—Free-standing music stands
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Abstract
The invention discloses a kind of portable spool music easel, solve it is existing turn over spectrometer mechanism complexity, huge structure, the technical issues of the practicability is poor.The present invention is connected to the panel on bracket, the book-groove for connecting and fixing music score is provided in the middle part of panel, Xian Bian mechanism and page turning mechanism are provided on panel, Xian Bian mechanism includes the friction pulley of the side setting of panel, friction pulley is in contact with the outside margin of music score, friction pulley is driven by friction pulley stepper motor, page turning mechanism includes the page turning stepper motor that panel upper lateral part is arranged in, page turning stepper motor is arranged between book-groove and friction pulley, the output shaft of page turning stepper motor is connected with L-shaped page turning bull stick, friction pulley stepper motor is connected by friction pulley stepper motor switch with single-chip microcontroller, page turning stepper motor passes through page turning stepper motor rotating forward switch respectively and page turning stepper motor reversal switch is connected with single-chip microcontroller.The present invention is not only simple in structure, size is small, and can be realized the automatic page turning of open-close type music score and Scroll music score.
Description
Technical field
The present invention relates to music easel technical fields, particularly relate to a kind of portable spool music easel.
Background technique
Music score is a kind of to print or hand-written production, and the method for music is recorded with symbol.Musical performer and music refer to
The person of waving needs to be guided by music score when carrying out musical performance, with performance carry out need to stir music score therewith.But
It is that musical performer and conductor person need both hands to be used in combination when playing, the operation for stirring music score can upset performance section
It plays, seriously affects the quality of performance.
It in order to solve the problems, such as flipbook, book leaf turner and turns over spectrometer and comes into being, existing book leaf turner and turn over spectrometer there are two types of shapes
Formula:
1, it inhales paper mode: using aerodynamic principle, carry out taking paper using atm difference, but this mode needs to design gas
Motivation structure and motor drive mechanism, not only mechanism is complicated, huge structure, and it is of long duration after take paper effect with regard to poor, application effect is simultaneously
It is undesirable;
2, determine paper mode: doing several page turning rods, each page turning rod is responsible for turning over one page book.Due to page turning rod limited amount, and
It needs to carry out corresponding clipping operation before each use, so the practicability is poor, application effect is also undesirable.
Summary of the invention
For the deficiency in above-mentioned background technique, the present invention proposes a kind of portable spool music easel, solves existing turn over
Spectrometer mechanism complexity, huge structure, the technical issues of the practicability is poor.
The technical scheme of the present invention is realized as follows: a kind of portable spool music easel, including bracket and it is connected to branch
Panel on frame is provided with the book-groove for connecting and fixing music score in the middle part of the panel, Xian Bian mechanism and page turning is provided on panel
Mechanism, Xian Bian mechanism include the friction pulley of the side setting of panel, and friction pulley is in contact with the outside margin of music score, and friction pulley is solid
Surely it is connected with worm screw, worm screw is arranged on panel by axle bed, and the back of panel is provided with friction pulley stepper motor, friction pulley step
Output shaft into motor is connected with the worm gear with worm-drive cooperation, and the page turning mechanism includes that turning over for panel upper lateral part is arranged in
Page stepper motor, page turning stepper motor are arranged between book-groove and friction pulley, and the output shaft of page turning stepper motor is connected with L-shaped
Page turning bull stick, the friction pulley stepper motor are connected by friction pulley stepper motor switch with single-chip microcontroller, and friction pulley stepping is closed
Friction pulley stepper motor rotates 90 degree after motor switch, and the page turning stepper motor passes through page turning stepper motor respectively and rotates forward switch
It is connected with page turning stepper motor reversal switch with single-chip microcontroller, page turning stepper motor rotates forward after closure page turning stepper motor rotates forward switch
90 degree, it is closed the anti-90 turns of degree of page turning stepper motor after page turning stepper motor reversal switch.
There are two the friction pulley settings, and two friction pulleys are separately positioned on the upper and lower part of music score outer side edges, axle bed
There are two settings, and two axle beds are arranged between two friction pulleys.
There are two the page turning stepper motor settings, and two page turning stepper motors are symmetrical set and pass through about book-groove
The same page turning stepper motor rotates forward switch, the same page turning stepper motor reversal switch is connected with single-chip microcontroller, two page turning steps
Angle degree of being between two page turning bull sticks on motor.
There are four the friction pulley settings, and four friction pulleys include two one group of left set friction pulley and right group of friction pulley,
Two groups of friction pulleys are about book-groove bilateral symmetry and are in contact respectively with the outside margin of the left and right sides of music score, the friction pulley step
It include left friction pulley stepper motor switch and right friction pulley stepper motor switch into motor switch.
There are four roll shaft seat, four roll shaft seats are above other member heights on panel for the quadrangle setting of the panel,
It is respectively arranged with a roll shaft in two roll shaft seats in left side and in two roll shaft seats on right side, is provided with roll shaft stepping on panel
Motor, roll shaft stepper motor are connected by transmission belt with roll shaft, and roll shaft stepper motor is switched by roll shaft stepper motor and monolithic
Machine is connected.
Clamping through slot is offered on the axial direction of the roll shaft, the both ends for being clamped through slot are provided with compressed spring, pressure
One end of contracting spring is fixedly connected with the side wall of clamping through slot, the other end is fixedly connected with T-shaped block, the horizontal segment clamping of T-shaped block
Between clamping through slot and compressed spring.
There are two roll shaft stepper motor settings, two roll shaft stepper motors by two transmission belts respectively with two rollers
Axis transmission connection, the roll shaft stepper motor switch include that roll shaft stepper motor rotating forward switch and the reversion of roll shaft stepper motor are opened
Close, two roll shaft stepper motors by roll shaft stepper motor rotate forward switch and roll shaft stepper motor reversal switch respectively with single-chip microcontroller
It is connected.
The bracket includes support base, and support base bottom surface is provided with the universal rolling wheel of brake, sets above universal rolling wheel
It is equipped with the support rod being connected with panel.
The present invention can be started the margin of music score by the friction pulley in Xian Bian mechanism, then turning over by page turning mechanism
Page bull stick overturns the page after lifting side, and then realizes the page turning of music score, the present invention can also music score to Scroll into
Row is automatic to be played, and can either realize the automatic page turning of open-close type music score, additionally it is possible to realize the page turning of Scroll music score.Every side setting
Two friction pulleys have fully ensured that music score lifts the reliability on side, effectively reduce the probability for lifting side failure.Friction pulley passes through worm screw
The drive form of worm wheel, is not only simple in structure, and can effectively reduce overall dimensions.In the driving circuit of single-chip microcontroller
Setting page turning stepper motor rotates 90 ° every time, it is ensured that the reliability of page turning avoids page turning not in place or overturning is excessive.If
Two page turning bull sticks and mutually 90 ° each other are set, two-way page turning can either be realized, and block can be carried out to the page after page turning, prevent
Only because caused by the factors such as wind the music score page turn round.
Detailed description of the invention
In order to illustrate the embodiments of the present invention more clearly, attached drawing needed in describing below to embodiment makees letter
Singly introduce, it should be apparent that, drawings in the following description are only some embodiments of the invention, skill common for this field
For art personnel, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural diagram of the present invention;
Fig. 2 is the rearview of Fig. 1;
Fig. 3 is the structural schematic diagram of roll shaft in Fig. 1;
Fig. 4 is the cross-sectional view of compressed spring position in Fig. 3;
Fig. 5 is the top view of T-shaped block in Fig. 3;
Fig. 6 is circuit control principle schematic diagram of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under that premise of not paying creative labor
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1, a kind of portable spool music easel including bracket and are connected on bracket as depicted in figs. 1 and 2
Panel 1, the middle part of the panel 1 are provided with the book-groove 2 of clamping music score 10, and the binding end of music score 10 is connected in book-groove 2, in turn
It is capable of fixing and is supported on panel 1.Bracket bracket includes support base 1-1, and the bottom surface support base 1-1 is provided with the universal rolling of brake
1-2 is taken turns, the support rod 1-3 being connected with panel 1 is provided with above support base 1-1, can easily be moved by universal rolling wheel 1-2
It is dynamic.
Xian Bian mechanism and page turning mechanism are provided on the panel 1, Xian Bian mechanism includes the friction of the side setting of panel 1
Wheel 3, friction pulley 3 is in contact with the outside margin of music score 10, and friction pulley 3 is fixedly connected with worm screw 4, and worm screw 4 is arranged by axle bed 5
On panel 1, the rotation of worm screw 4 will drive the rotation of friction pulley 3, and then friction pulley 3 can start the margin of music score 10.
The back of the panel 1 is provided with friction pulley stepper motor 5, the output shaft of friction pulley stepper motor 5 be connected with
The worm gear 6 of the transmission cooperation of worm screw 4.The rotation of friction pulley stepper motor 5 is able to drive the rotation of worm gear 6, worm gear 6 and then drive worm screw 4
Rotation, then friction pulley 3 is driven therewith.The friction pulley stepper motor 5 passes through friction pulley stepper motor switch and single-chip microcontroller 20
It is connected, single-chip microcontroller 20 is connected with power supply and is stored with friction pulley Step-by-step Motor Device Driver, is closed friction pulley stepper motor
Friction pulley stepper motor 5 rotates 90 degree after switch, then friction pulley 3 rotates with it 90 degree, just starts the margin of music score 10.
The page turning mechanism includes the page turning stepper motor 7 that 1 upper lateral part of panel is arranged in, and the setting of page turning stepper motor 7 exists
Between book-groove 2 and friction pulley 3, the output shaft of page turning stepper motor 7 is connected with L-shaped page turning bull stick 8.7 energy of page turning stepper motor
Enough page turning bull stick 8 is driven to rotate, with the rotation of page turning bull stick 8, is inserted on the downside of the page started, then will gradually start
The page turn to the other side.
As shown in fig. 6, the page turning stepper motor 7 rotates forward switch K1 and page turning stepping electricity by page turning stepper motor respectively
Machine reversal switch K2 is connected with single-chip microcontroller 20, and page turning Step-by-step Motor Device Driver, page turning stepper motor are stored in single-chip microcontroller 20
It rotates forward switch K1 and page turning stepper motor reversal switch K2 to be arranged above support base 1-1, be trampled convenient for operator's foot-propelled.
When carrying out page turning, closure page turning stepper motor first rotates forward switch K1, then page turning stepper motor 7 is just turn 90 degrees, therewith page turning
Then the page scroll that bull stick 8 starts friction pulley 3 is closed page turning stepper motor reversal switch K2, then page turning walks to the other side
It is turn 90 degrees into motor 7 is counter, page turning bull stick 8 is back to original position therewith, that is, may wait for page turning next time.
Embodiment 2, a kind of portable spool music easel, there are two the settings of friction pulley 3, and two friction pulleys 3 are set respectively
It sets in the upper and lower part of 10 outer side edges of music score, there are two the settings of axle bed 5, and two axle beds 5 are arranged between two friction pulleys 3.
Two friction pulleys are set, have fully ensured that music score lifts the reliability on side, effectively reduce the probability for lifting side failure.
The other structures of the present embodiment are same as Example 1.
Embodiment 3, a kind of portable spool music easel, as shown in figs. 1,2 and 6, the page turning stepper motor 7 are arranged
There are two, two page turning stepper motors 7 are symmetrical set about book-groove 2 and are rotated forward by the same page turning stepper motor and switched
K1, the same page turning stepper motor reversal switch K2 are connected with single-chip microcontroller 20.After being then closed page turning stepper motor rotating forward switch K1,
After the synchronous rotating forward closure page turning stepper motor reversal switch K2 of two page turning stepper motors 7 can be controlled, two can be controlled and turned over
The synchronous return of page stepper motor 7.The angle between two page turning bull sticks 8 on two page turning stepper motors 7 is 90 degree, Neng Goubao
Two page turning bull sticks will not influence each other when demonstrate,proving positive page turning and reversed page turning.
The other structures of the present embodiment are identical as embodiment 1 or 2.
Embodiment 4, a kind of portable spool music easel, as shown in Figure 1 and Figure 2, there are four the settings of friction pulley 3, and four
Friction pulley 3 includes two one group of left set friction pulley and right group of friction pulley, and two groups of friction pulleys 3 are about 2 bilateral symmetry of book-groove and divide
It is not in contact with the outside margin of the left and right sides of music score 10.As shown in fig. 6, the friction pulley stepper motor switch rubs including a left side
Wipe wheel stepper motor switch K3 and right friction pulley stepper motor switch K4, left friction pulley stepper motor switch K3 and right friction pulley step
It is arranged above support base 1-1 into motor switch K4, is trampled convenient for operator's foot-propelled.By controlling left friction pulley step respectively
Into motor switch K3 and right friction pulley stepper motor switch K4, it is able to control left friction pulley group and starts left margin and right friction
Wheel group starts right margin, and page turning mechanism is then cooperated to can be realized the beneficial effect of two-way page turning.
The other structures of the present embodiment are identical as embodiment 1 or 3.
Embodiment 5, a kind of portable spool music easel, as shown in Figure 1, there are four roll shafts for the quadrangle setting of the panel 1
Seat 9, four roll shaft seats 9 are above other member heights on panel 1, interior two rollers with right side of two roll shaft seats 9 in left side
A roll shaft 11 is respectively arranged in axle bed 9, roll shaft 11 can rotate in roll shaft seat 9.
Roll shaft stepper motor 12 is provided on the panel 1, roll shaft stepper motor 12 passes through transmission belt 13 and 11 phase of roll shaft
Even, by the drive of roll shaft stepper motor 12, it can be controlled separately the rotation of two roll shafts 11.The roll shaft stepper motor 12 is set
There are two setting, two roll shaft stepper motors 12 are sequentially connected with two roll shafts 11 respectively by two transmission belts 13.
As shown in fig. 6, the roll shaft stepper motor 12 is connected by roll shaft stepper motor switch with single-chip microcontroller 20, single-chip microcontroller
It is stored with the driver of control roll shaft stepper motor in 20, roll shaft driven circle each time can be modified according to actual needs
Number.The roll shaft stepper motor switch includes that roll shaft stepper motor rotates forward switch K5 and roll shaft stepper motor reversal switch K6, roller
Shaft step motor rotates forward switch K5 and roll shaft stepper motor reversal switch K6 and is arranged above support base 1-1, is convenient for operator
Member's foot-propelled is trampled.Two roll shaft stepper motors 12 rotate forward switch K5 and roll shaft stepper motor reversal switch by roll shaft stepper motor
K6 is connected with single-chip microcontroller 20 respectively.It being closed roll shaft stepper motor and rotates forward switch K5, then two roll shaft stepper motors 12 are synchronous rotates forward,
It is closed roll shaft stepper motor reversion K6 switch, the synchronous reversion of the two roll shaft stepper motors 12.
As in Figure 3-5, clamping through slot 14 is offered on the axial direction of the roll shaft 11, is clamped the both ends of through slot 14
It is provided with compressed spring 15, one end of compressed spring 15 is fixedly connected with the side wall of clamping through slot 14, the other end is fixedly connected with T
Shape block 16, the horizontal segment of T-shaped block 16 are connected between clamping through slot 14 and compressed spring 15.T-shaped block is pulled up, it can be by Scroll
Music score a side be crimped on T-shaped block and be clamped through slot side wall between, then operation roller shaft step motor switch can be realized
The automatic broadcasting of Scroll music score.The driver of control roll shaft not only motor, each volume of spool are provided in single-chip microcontroller 20
Dynamic length can be adjusted according to actual needs.
The other structures of the present embodiment are identical as embodiment 1 or 2 or 3.
The not detailed place of the present invention is conventional technical means known in those skilled in the art.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of portable spool music easel, including bracket and the panel being connected on bracket (1), it is characterised in that: the face
The book-groove (2) for connecting and fixing music score (10) is provided in the middle part of plate (1), panel is provided with Xian Bian mechanism and page turning mechanism on (1),
Xian Bian mechanism includes the friction pulley (3) of the side setting of panel (1), and friction pulley (3) is in contact with the outside margin of music score (10),
Friction pulley (3) is fixedly connected with worm screw (4), and worm screw (4) is arranged on panel (1) by axle bed (5), and the back of panel (1) is set
It is equipped with friction pulley stepper motor (5), the output shaft of friction pulley stepper motor (5) is connected with the worm gear with worm screw (4) transmission cooperation
(6), the page turning mechanism includes page turning stepper motor (7) of the setting in panel (1) upper lateral part, page turning stepper motor (7) setting
Between book-groove (2) and friction pulley (3), the output shaft of page turning stepper motor (7) is connected with L-shaped page turning bull stick (8), described to rub
It wipes wheel stepper motor (5) to be connected by friction pulley stepper motor switch with single-chip microcontroller, single-chip microcontroller is connected with power supply, the page turning step
Switch and page turning stepper motor reversal switch is rotated forward by page turning stepper motor respectively into motor (7) to be connected with single-chip microcontroller.
2. portable spool music easel according to claim 1, it is characterised in that: there are two friction pulley (3) settings,
Two friction pulleys (3) are separately positioned on the upper and lower part of music score (10) outer side edges, and there are two axle bed (5) settings, two axle beds
(5) it is arranged between two friction pulleys (3).
3. portable spool music easel according to claim 2, it is characterised in that: page turning stepper motor (7) setting
There are two, two page turning stepper motors (7) are symmetrical set about book-groove (2) and are rotated forward by the same page turning stepper motor
Switch, the same page turning stepper motor reversal switch are connected with single-chip microcontroller, and two page turnings on two page turning stepper motors (7) turn
Angle between bar (8) is 90 degree.
4. portable spool music easel according to claim 3, it is characterised in that: there are four friction pulley (3) settings,
Four friction pulleys (3) include two one group of left set friction pulley and right group of friction pulley, and two groups of friction pulleys (3) are about book-groove (2) left side
The right side is symmetrical and is in contact respectively with the outside margin of the left and right sides of music score (10), and the friction pulley stepper motor switch includes a left side
Friction pulley stepper motor switch and right friction pulley stepper motor switch.
5. portable spool music easel according to claim 1-4, it is characterised in that: the four of the panel (1)
There are four roll shaft seat (9), four roll shaft seats (9) are above other member heights on panel (1), two rollers in left side for angle setting
It is respectively arranged with a roll shaft (11) in axle bed (9) and in two roll shaft seats (9) on right side, roll shaft step is provided on panel (1)
Into motor (12), roll shaft stepper motor (12) is connected by transmission belt (13) with roll shaft (11), and roll shaft stepper motor (12) passes through
Roll shaft stepper motor switch is connected with single-chip microcontroller.
6. portable spool music easel according to claim 5, it is characterised in that: on the axial direction of the roll shaft (11)
Clamping through slot (14) is offered, the both ends of clamping through slot (14) are provided with compressed spring (15), one end of compressed spring (15)
It is fixedly connected with the side wall of clamping through slot (14), the other end is fixedly connected with T-shaped block (16), the horizontal segment clamping of T-shaped block (16)
Between clamping through slot (14) and compressed spring (15).
7. portable spool music easel according to claim 6, it is characterised in that: roll shaft stepper motor (12) setting
There are two, two roll shaft stepper motors (12) are sequentially connected with two roll shafts (11) respectively by two transmission belts (13), described
Roll shaft stepper motor switch includes that roll shaft stepper motor rotates forward switch and roll shaft stepper motor reversal switch, two roll shaft stepping electricity
Machine (12) rotates forward switch by roll shaft stepper motor and roll shaft stepper motor reversal switch is connected with single-chip microcontroller respectively.
8. portable spool music easel according to claim 7, it is characterised in that: the bracket includes support base (1-1),
The bottom surface support base (1-1) is provided with the universal rolling wheel (1-2) of brake, is provided with above universal rolling wheel (1-2) and panel (1)
Connected support rod (1-3).
9. portable spool music easel according to claim 8, it is characterised in that: the page turning bull stick (8) is transparent bar.
Priority Applications (1)
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CN201910390337.0A CN109998278A (en) | 2019-05-10 | 2019-05-10 | A kind of portable spool music easel |
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CN201910390337.0A CN109998278A (en) | 2019-05-10 | 2019-05-10 | A kind of portable spool music easel |
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CN109998278A true CN109998278A (en) | 2019-07-12 |
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CN201910390337.0A Pending CN109998278A (en) | 2019-05-10 | 2019-05-10 | A kind of portable spool music easel |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113142796A (en) * | 2021-05-12 | 2021-07-23 | 安阳师范学院 | Music book placing device for music teaching |
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CN108995431A (en) * | 2018-07-27 | 2018-12-14 | 河南教育学院 | The music easel of automatic page turning |
CN109228729A (en) * | 2018-10-28 | 2019-01-18 | 郑小海 | A kind of working method of music-book on pianoforte automatic leaf turner |
CN208570083U (en) * | 2018-05-30 | 2019-03-01 | 长江大学 | A kind of piano performance music score apparatus with auxiliary page-turning function |
CN208584933U (en) * | 2018-05-22 | 2019-03-08 | 成都九十度工业产品设计有限公司 | A kind of music score electrostatic leaf turner |
CN210076932U (en) * | 2019-05-10 | 2020-02-18 | 黄河科技学院 | Portable scroll music stand |
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2019
- 2019-05-10 CN CN201910390337.0A patent/CN109998278A/en active Pending
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Publication number | Priority date | Publication date | Assignee | Title |
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CN108248244A (en) * | 2018-03-28 | 2018-07-06 | 枣庄学院 | Music score books leaf turner |
CN208584933U (en) * | 2018-05-22 | 2019-03-08 | 成都九十度工业产品设计有限公司 | A kind of music score electrostatic leaf turner |
CN208570083U (en) * | 2018-05-30 | 2019-03-01 | 长江大学 | A kind of piano performance music score apparatus with auxiliary page-turning function |
CN108995431A (en) * | 2018-07-27 | 2018-12-14 | 河南教育学院 | The music easel of automatic page turning |
CN109228729A (en) * | 2018-10-28 | 2019-01-18 | 郑小海 | A kind of working method of music-book on pianoforte automatic leaf turner |
CN210076932U (en) * | 2019-05-10 | 2020-02-18 | 黄河科技学院 | Portable scroll music stand |
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CN113142796A (en) * | 2021-05-12 | 2021-07-23 | 安阳师范学院 | Music book placing device for music teaching |
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