CN112735488B - Detachable music box - Google Patents
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- CN112735488B CN112735488B CN202110210300.2A CN202110210300A CN112735488B CN 112735488 B CN112735488 B CN 112735488B CN 202110210300 A CN202110210300 A CN 202110210300A CN 112735488 B CN112735488 B CN 112735488B
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- 239000004973 liquid crystal related substance Substances 0.000 claims description 13
- 238000004364 calculation method Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 239000007769 metal material Substances 0.000 claims description 7
- 239000012811 non-conductive material Substances 0.000 claims description 6
- 238000005286 illumination Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 6
- 239000002131 composite material Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003086 colorant Substances 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B31/00—Arrangements for the associated working of recording or reproducing apparatus with related apparatus
- G11B31/02—Arrangements for the associated working of recording or reproducing apparatus with related apparatus with automatic musical instruments
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/02—Control of operating function, e.g. switching from recording to reproducing
- G11B19/022—Control panels
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/10—Indicating arrangements; Warning arrangements
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/12—Disposition of constructional parts in the apparatus, e.g. of power supply, of modules
- G11B33/121—Disposition of constructional parts in the apparatus, e.g. of power supply, of modules the apparatus comprising a single recording/reproducing device
- G11B33/122—Arrangements for providing electrical connections, e.g. connectors, cables, switches
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Abstract
The invention relates to a detachable music box, which solves the problem that the traditional music box is not personalized, and provides a music box customized according to quantity requirements, wherein the music box has an independent working mode and a combined working mode, when the music boxes work independently, the music boxes do not influence each other, and when the music boxes work in combination, after the music boxes meeting the customized quantity are connected and combined according to a designed mode, a master music box can start a color LED lighting mode to celebrate successful congregation of a team.
Description
Technical Field
The invention mainly relates to the field of music boxes, in particular to a music box which is split, each music box works independently and can be switched on in a color LED flashing mode after being combined according to a set number.
Background
With the continuous progress of science and technology, people continuously pursue beautiful life and continuously change life, the requirement of people on the commemorative significance of the traditional music box is higher, and the application of high-technology to the music box determines the new trend and the prospect of the development of the music box. For the understanding of the music box, people are not limited to the requirement of playing music any more, the traditional mechanical music box cannot adapt to the life of people of the present age, and the design of the combined electronic music box can just make up the defect that the music box cannot be customized individually, thereby meeting the individual customization and personalized requirements of the public and realizing the dual requirements of function and commemorative significance.
The gifts customized for small groups or folk combinations need to have both ornamental and commemorative significance, and according to the principle that the customized gifts are small and precise, the requirements of different numbers of music box combinations and the requirements of production cost need to be considered when the music boxes are designed.
Disclosure of Invention
The invention aims to solve the problem that the traditional music box is not personalized, and provides a music box customized according to quantity requirements, wherein the music box is provided with an independent working mode and a combined working mode, when the music boxes work independently, the music boxes do not influence each other, and when the music boxes work in a combined mode, the main music box can start a colorful LED lighting mode after the music boxes meeting the customized quantity are connected and combined according to a designed mode, so that the main music box can be used for celebrating the successful gathering of a team.
In order to achieve the above object, a detachable music box of the present invention comprises: 1 main music box and 1 to 8 sub music boxes,
the main music box and the auxiliary music box jointly comprise a bottom box, a first contact frame, a second contact frame, a first supporting platform, a second supporting platform, a first guide hole, a second guide hole, a parallel resistor, a loudspeaker, a cylinder and a liquid crystal screen, the main music box also comprises a main controller, the auxiliary music box also comprises an auxiliary controller, a first contact piece and a second contact piece,
the first supporting table and the second supporting table are fixed at the bottom of the bottom box, the first contact frame and the second contact frame are respectively fixed on the first supporting table and the second supporting table, two ends of the parallel resistor are respectively and fixedly connected on the first contact frame and the second contact frame, the center distance between the first contact piece and the second contact piece is equal to the center distance between the first guide hole and the second guide hole, the first supporting table and the second supporting table are made of non-conductive materials,
the main controller comprises a main power supply unit, a main key, a main music playing unit, a voltage comparison unit and a color LED, the main controller is connected with the main power supply unit, the main key, the main music playing unit, the voltage comparison unit and the color LED through circuits, the auxiliary music box comprises an auxiliary controller, an auxiliary power supply unit, an auxiliary key and an auxiliary music playing unit, the auxiliary controller is connected with the auxiliary power supply unit, the auxiliary key and the auxiliary music playing unit through circuits,
the voltage comparison unit is used for detecting the number of connected auxiliary music boxes and comprises a first comparator, a second comparator, an AND gate circuit, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R11, a resistor R15, a resistor R16, a resistor R17 and a resistor R18, wherein the resistance of the resistor R11 is the same as the resistance of parallel resistors, one end of the resistor R1 is connected with a power supply, the other end of the resistor R1 is connected with the parallel resistor R11 in parallel, one end of the resistor R2 is connected with the power supply, the other end of the resistor R3 is connected with the ground after being connected with the resistor R3 in series, the other end of the resistor R3 is connected with the positive input end of the first comparator, the negative input end of the first comparator is connected with the point of the resistor R1 and the resistor R11 in series and the positive input end of the second comparator at the same time, one end of the resistor R16 is connected with the power supply, the other end of the resistor R16 is connected with the negative input end of the second comparator and is connected with the ground through the resistor R17, the first comparator and the second comparator are connected with the main control input end of the AND gate comparator and the output of the LED through the resistor R4 and the LED lighting box, the LED lighting box is in a high-color mode, and the LED lighting mode is kept in a low-color LED lighting mode,
and when the resistance values of the resistor R3 and the resistor R17 are adjusted to ensure that the number of the connected auxiliary music boxes is equal to a set value, the step of outputting high level by the AND gate comprises the following steps:
step one, calculating the resistance range of a resistor R3 according to the expected number N of the auxiliary music boxes, wherein N is an integer and satisfies the requirement
Setting the power supply voltage to VCC, calculating the voltage at the negative input terminal of the first comparator
Step two, when N-1 auxiliary music boxes are connected in parallel, the voltage of the negative input end of the first comparator is calculated
Step three, according to the positive input end voltage of the first comparator, the condition is satisfied
Further calculation results
Step four, calculating the value range of R3, taking R3 as the middle value of the range,
step five, when 1 main music box is calculated to be connected with N auxiliary music boxes in parallel, the positive input end voltage of the second comparator
Step six, when calculating that 1 main music box is connected with N +1 auxiliary music boxes in parallel, the positive input end voltage of the second comparator
Step seven, according to the voltage of the negative input end of the second comparator
Satisfies the conditions
Further calculation results
Step eight, calculating the value range of R17, and taking R17 as the middle value of the range;
the invention has the beneficial effects that: when the music boxes are cascaded, the first contact piece is connected with the first contact frame and the second contact piece is connected with the second contact frame, the parallel resistor is connected into the main music box, under the condition that 1 main music box is connected with N auxiliary music boxes in parallel, the first comparator outputs high level, when the parallel number is less than N, the first comparator outputs low level, under the condition that 1 main music box is connected with N auxiliary music boxes in parallel, the second comparator outputs high level, when the parallel number is more than N, the second comparator outputs low level, only when the outputs of the first comparator and the second comparator are both high level, the output of the AND gate is high level, therefore, the main music box can judge whether the number of the connected auxiliary music boxes is just N or not, when the number of the connected auxiliary music boxes is just equal to a set value N, the main music box starts an LED flickering function, otherwise, the LED flickering function is extinguished, and the main music box can only play music under the operation of a user.
The customization method of the detachable music box is simple, the function of connecting and triggering the LED to flicker by the aid of different numbers of the auxiliary music boxes can be realized only by adjusting the resistor, and the detachable music box has commemorative significance. The user can customize 1 main music box, 1 to 9 vice music boxes, according to the vice music box quantity of customization, calculate and adjust resistance R3 and resistance R17 can, each music box can independently play the music, realizes the function of music box usually, but when the music box of settlement quantity links together, can open distinctive function of lighting LED, has more increased the sense of commemoration and has worth as the uniqueness of present.
Furthermore, the main music box and the auxiliary music box both comprise liquid crystal screens.
The beneficial effect of adopting the above further scheme is: the liquid crystal display can display pictures, and can also display different pictures under the operation of a user, so that the ornamental value and the practicability of the music box are expanded.
Further, the main music box and the sub music box each include a cylinder.
The beneficial effect of adopting the above further scheme is: the column can support the liquid crystal screen and the keys, and facilitate operation and view and admire displayed pictures.
Furthermore, the first contact piece and the second contact piece are both made of metal materials, and the center distance between the first contact piece and the second contact piece is equal to the center distance between the first guide hole and the second guide hole.
The beneficial effect of adopting the further scheme is that: the connection between the auxiliary music box and the main music box or other auxiliary music boxes is easy to position, and the metal material ensures that the parallel resistor can be connected into the voltage detection point of the main music box without being influenced and is not interfered by other part of resistors.
Furthermore, the first supporting table and the second supporting table are made of non-conductive materials.
The beneficial effect of adopting the further scheme is that: the first contact frame, the second contact frame and the bottom box are isolated from each other in conductivity, and the influence of the resistance of other parts on the parallel resistance is avoided.
Furthermore, first contact piece and second contact piece are located the end box outside and are the inclined plane, and the top surface is longer, and the lower part is shorter, first contact frame and second contact frame be oblique long form, slope towards first guide hole and second guide hole bottom respectively, the material is the metal material.
The beneficial effect of adopting the further scheme is that: the first contact piece and the second contact piece can be well kept in good contact with the first contact frame and the second contact frame respectively.
Drawings
FIG. 1 is a schematic bottom view of a master music box according to the present invention;
FIG. 2 is a bottom structure diagram of the auxiliary music box according to the present invention;
FIG. 3 is a combined effect diagram of the music box of the present invention;
FIG. 4 is a schematic diagram of the main music box control portion of the present invention;
FIG. 5 is a schematic diagram of the control part of the sub music box according to the present invention;
FIG. 6 is a schematic circuit diagram of the voltage comparison unit of the present invention when 3 music boxes are connected in parallel;
FIG. 7 is a schematic circuit diagram of the voltage comparison unit of the present invention when connecting 7 sub-music boxes in parallel;
FIG. 8 is a schematic diagram of a color LED driving circuit according to the present invention;
FIG. 9 is a schematic diagram of a key driving circuit according to the present invention.
Wherein the reference numerals are: 1-bottom box, 11-first contact frame; 12-a second contact holder; 13-a first guide hole; 14-a second guide hole; 15-parallel resistance; 16-a first support table; 17-a second support table; 18-a first contact pad; 19-a second contact sheet; 2-a control box; 3, a loudspeaker; 31-a music playing unit; 4-a liquid crystal screen; 5-pressing a key; 6-column; 7-master music box; 71-a master controller; 72-a main power supply unit; 73-a voltage comparison unit; 74-color LED; 8-pair of music boxes; 81-secondary controller; 82-secondary power supply unit.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Example 1:
as shown in fig. 1 to 6, 8 and 9, a detachable music box includes: 1 main music box 7 and 3 sub music boxes 8,
the main music box 7 and the auxiliary music box 8 jointly comprise a bottom box, a first contact frame 11, a second contact frame 12, a first supporting platform 16, a second supporting platform 17, a first guide hole 13, a second guide hole 14, a parallel resistor 15, a music playing unit 31, a loudspeaker 3, a column 6 and a liquid crystal screen 4, the auxiliary music box 8 also comprises a first contact piece 18 and a second contact piece 19,
the first supporting platform 16 and the second supporting platform 17 are both fixed at the bottom of the bottom case 1, the first contact frame 11 and the second contact frame 12 are respectively fixed on the first supporting platform 16 and the second supporting platform 17, two ends of the parallel resistor 15 are respectively fixedly connected on the first contact frame 11 and the second contact frame 12, the center distance between the first contact piece 18 and the second contact piece 19 is equal to the center distance between the first guide hole 13 and the second guide hole 14, the first supporting platform 16 and the second supporting platform 17 are made of non-conductive materials,
the main music box 7 also comprises a main controller 71, a main power supply unit 72, a voltage comparison unit 73 and a color LED74, the main controller 71 is connected with the main power supply unit 72, the keys 5, the liquid crystal screen 4, the music playing unit 31, the voltage comparison unit 73 and the color LED74 through circuits, the auxiliary music box 8 comprises an auxiliary controller 81 and an auxiliary power supply unit 82, the auxiliary controller 81 is connected with the power supply unit, the keys 5, the liquid crystal screen 4 and the music playing unit 31 through circuits,
the voltage comparison unit 73 is used for detecting the number of the connected auxiliary music boxes 8 and comprises a first comparator, a second comparator, an AND gate circuit, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R11, a resistor R15, a resistor R16, a resistor R17 and a resistor R18, wherein the resistance of the resistor R11 is the same as the resistance of the parallel resistor 15, one end of the resistor R1 is connected with a power supply, the other end of the resistor R1 is connected with the parallel resistor 15R11, one end of the resistor R2 is connected with the power supply, the other end of the resistor R3 is connected with the ground after being connected with the resistor R3 in series, the other end of the resistor R3 is connected with the positive input end of the first comparator, the negative input end of the first comparator is simultaneously connected with the point where the resistor R1 and the resistor R11 are connected in series and the positive input end of the second comparator, one end of the resistor R16 is connected with a power supply, the other end of the resistor R16 is connected to the negative input end of the second comparator and is grounded through the resistor R17, the first comparator and the second comparator are respectively connected with the power supply through the resistor R4 and the resistor R18 in an upward pulling mode and are respectively connected with two input ends of the AND gate through the series resistor R5 and the resistor R15, the output end of the AND gate is connected to the main controller 71 through a line, the AND gate outputs a high level signal to trigger the music box to enter a combined working mode, the color LED74 lighting mode is started, when the AND gate outputs a low level, the music box is in an independent working mode, and the color LED74 keeps an off state.
The detachable music box is customized into 1 main music box 7 and 3 vice music boxes 8, calculates and adjusts the resistance of resistance R3 and resistance R17 for when connecting vice music box 8 quantity and equals 3, and the step of AND gate output high level is:
in the first step, the comparator is LM393, except R3 and R17, other resistance values are respectively:
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，/>
，
in the case of 1 master music box 7 in parallel with 3 slave music boxes 8, the negative input of the first comparator, pin 2 of the U1A chip, is at a voltage of
Second, in the case of 1 main music box 7 connected in parallel to 2 sub music boxes 8, the voltage at the negative input of the first comparator, pin 2 of the U1A chip, is
Thirdly, the condition that the value of R3 needs to be satisfied is that
Further calculation results
The fourth step, taking the middle value of the range, and taking the value of R3 as
Thus, the first comparator only connects 3 and more than 3 pieces of music in parallelThe high level is output in case of box 8;
in the same way, the method for preparing the composite material,
fifth, in the case where 1 main music box 7 is connected in parallel to 3 sub music boxes 8, the voltage at the positive input terminal of the second comparator U1B is
，
Sixth, in the case where 1 main music box 7 is connected in parallel to 4 sub music boxes 8, the voltage at the positive input terminal of the second comparator U1B is
，
Seventhly, taking the value of R17 requires that the voltage of the sixth pin of the second comparator be made
Satisfy the requirement of
Further calculation results
The eighth step, the middle value of the range is taken, and R17 takes the value as
Whereby the second comparator outputs a high level only in the case of connecting 3 and less than 3 sub-music boxes 8 in parallel.
The lighting function of the color LED74, as a commemorative meaning of the return of the celebratory team, can be turned on only when the main music box 7 and the 3 sub music boxes 8 are collected together by inserting the first contact piece 18 and the second contact piece 19 of the sub music box 8 into the first guide hole 13 and the second guide hole 14 of the main music box 7, respectively, and contacting the first contact frame 11 and the second contact frame 12 of the main music box 7, respectively, and according to this method, inserting the first contact piece 18 and the second contact piece 19 of the remaining sub music boxes 8 into the first guide hole 13 and the second contact frame 14 of the previous sub music box 8, respectively, and contacting the first contact frame 11 and the second contact frame 12 of the sub music box 8, respectively, completing the access of the 3 sub music boxes 8, and the main controller 71 detects the output level state of the and gate in real time, and enters the combined operation mode when detecting a high level signal, turns on the color LED74 lighting mode, otherwise, the music boxes are independent operation mode, and the color LED74 is turned off.
Referring to fig. 8, the color LED74 is composed of three color LEDs of red, yellow, and green, and different colors can be obtained by mixing by adjusting the brightness of different LEDs, and the driving signal is given by the main controller 71, and the current is amplified and enhanced by a triode.
Furthermore, the main music box 7 and the auxiliary music box 8 both comprise the liquid crystal screen 4, the liquid crystal screen 4 can display pictures, different pictures can be displayed under the operation of a user, and the ornamental value and the practicability of the music boxes are expanded.
Furthermore, the main music box 7 and the auxiliary music box 8 both comprise a column 6, and the column 6 can support the liquid crystal screen 4 and the keys 5, so as to facilitate operation and view displayed pictures.
Example 2:
as shown in fig. 1 to 5, and fig. 7 to 9, the detachable music box is customized to 1 main music box 7 and 7 sub music boxes 8.
The main music box 7 and the auxiliary music box 8 jointly comprise a bottom box 1, a first contact frame 11, a second contact frame 12, a first supporting platform 16, a second supporting platform 17, a first guide hole 13, a second guide hole 14, a parallel resistor 15, a loudspeaker 3, a music playing unit 31, a column 6 and a liquid crystal screen 4, the auxiliary music box 8 also comprises a first contact piece 18 and a second contact piece 19,
the first supporting platform 16 and the second supporting platform 17 are both fixed at the bottom of the bottom case 1, the first contact frame 11 and the second contact frame 12 are respectively fixed on the first supporting platform 16 and the second supporting platform 17, two ends of the parallel resistor 15 are respectively fixedly connected on the first contact frame 11 and the second contact frame 12, the center distance between the first contact piece 18 and the second contact piece 19 is equal to the center distance between the first guide hole 13 and the second guide hole 14, the first supporting platform 16 and the second supporting platform 17 are made of non-conductive materials,
the main music box 7 also comprises a main controller 71, a main power supply unit 72, a voltage comparison unit 73 and a color LED74, the main controller 71 is connected with the main power supply unit 72, the key 5, the music playing unit 31, the voltage comparison unit 73 and the color LED74 through lines, the auxiliary music box 8 comprises an auxiliary controller 81 and an auxiliary power supply unit 82, the auxiliary controller 81 is connected with the power supply unit, the key 5 and the music playing unit 31 through lines,
the voltage comparison unit 73 is used for detecting the number of the connected auxiliary music boxes 8 and comprises a first comparator, a second comparator, an AND gate circuit, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R11, a resistor R15, a resistor R16, a resistor R17 and a resistor R18, wherein the resistance of the resistor R11 is the same as the resistance of the parallel resistor 15, one end of the resistor R1 is connected with a power supply, the other end of the resistor R1 is connected with the parallel resistor 15R11, one end of the resistor R2 is connected with the power supply, the other end of the resistor R3 is connected with the ground after being connected with the resistor R3 in series, the other end of the resistor R3 is connected with the positive input end of the first comparator, the negative input end of the first comparator is simultaneously connected with the point where the resistor R1 and the resistor R11 are connected in series and the positive input end of the second comparator, one end of the resistor R16 is connected with a power supply, the other end of the resistor R16 is connected to the negative input end of the second comparator and is grounded through the resistor R17, the first comparator and the second comparator are respectively connected with the power supply through the resistor R4 and the resistor R18 in a pull-up mode, and are respectively connected with the two input ends of the AND gate through the series resistor R5 and the resistor R15, the output end of the AND gate is connected to the main controller 71 through a line, the AND gate outputs a high level signal to trigger the music box to enter a combined working mode, the color LED74 lighting mode is started, when the AND gate outputs a low level, the music box is in an independent working mode, and the color LED74 keeps an off state.
The detachable music box is customized into 1 main music box 7 and 7 auxiliary music boxes 8, and the resistance values of the resistor R3 and the resistor R17 are calculated and adjusted, so that when the number of the auxiliary music boxes 8 is equal to 7, the AND gate outputs high level, and the method comprises the following steps:
step one, the model of the comparator is selected as LM393, except R3 and R17, the resistance values of other resistors are respectively as follows:
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，
，
in the case of 1 master music box 7 in parallel with 7 slave music boxes 8, the negative input of the first comparator, pin 2 of the U1A chip, is at a voltage of
Step two, under the condition that 1 main music box 7 is connected with 6 auxiliary music boxes 8 in parallel, the voltage of the negative input end of the first comparator, namely the No. 2 pin of the U1A chip is
Step three, the condition required to be met according to the value of R3 is
Further calculation results
Step four, taking the middle value of the range, and taking the value of R3 as
Whereby the first comparator outputs a high level only in the case where 7 or more than 7 sub-music boxes 8 are connected in parallel, and the first comparator outputs a low level when the number of the sub-music boxes 8 connected in parallel is 6 and 6 or less;
in the same way, the method for preparing the composite material,
step five, under the condition that 1 main music box 7 is connected with 7 auxiliary music boxes 8 in parallel, the voltage of the positive input end of the second comparator U1B
，
Step six, under the condition that 1 main music box 7 is connected with 8 auxiliary music boxes 8 in parallel, the positive input end voltage of the second comparator U1B
，
Step seven, therefore, the value of R17 needs to make the negative input terminal of the second comparator U1B, i.e., the voltage of the sixth pin
Satisfy the requirement of
Further calculation results
Step eight, taking the middle value of the range, and taking the value of R17 as
Thus, the first comparator outputs a high level only in the case where 7 or less than 7 sub-music boxes 8 are connected in parallel, and the second comparator outputs a low level when the number of music boxes connected in parallel is 8 or more than 8.
The lighting function of the color LED74 is turned on only when the main music box 7 and the 7 sub-music boxes 8 are collected together, by first inserting the first contact piece 18 and the second contact piece 19 of one of the sub-music boxes 8 into alignment with the first guide hole 13 and the second guide hole 14 of the main music box 7 and into contact with the first contact frame 11 and the second contact frame 12 of the main music box 7, respectively, and by this method, inserting the first contact piece 18 and the second contact piece 19 of the remaining sub-music box 8 into alignment with the first guide hole 13 and the second guide hole 14 of the previous sub-music box 8 and into contact with the first contact frame 11 and the second contact frame 12 of the sub-music box 8, respectively, and sequentially completing the access of the 7 sub-music boxes 8, while the main controller 71 detects the output level state of the and gate in real time, and enters the combination operation mode when detecting a high level signal, turns on the color LED74 lighting mode, otherwise, in the case where the output level of the and gate is low, the color LED74 remains off.
Further, the main music box 7 and the sub-music box 8 respectively include a main music playing unit 31 and a sub-music playing unit 31, and the functions of playing songs can be provided under the control of the main music box 7 and the sub-music box 8, respectively, so that the practicability of the music boxes is enhanced.
Furthermore, the first contact piece 18 and the second contact piece 19 are both made of metal, and the center distance between the two contact pieces is equal to the center distance between the first guide hole 13 and the second guide hole 14, so that the connection between the auxiliary music box 8 and the main music box 7 or other auxiliary music boxes 8 is easy to locate, and the metal material ensures that the parallel resistor 15 can be connected to the voltage detection point of the main music box 7 without being affected by other part of resistors.
Furthermore, the first support table 16 and the second support table 17 are made of non-conductive materials, so that the first contact frame 11, the second contact frame 12 and the bottom case 1 are isolated from conductivity, and the influence of the resistance of other parts on the parallel resistor 15 is avoided.
Furthermore, the first contact piece 18 and the second contact piece 19 are located outside the bottom case 1 and have inclined surfaces, the upper part is longer, the lower part is shorter, the first contact frame 11 and the second contact frame 12 are in inclined long shapes and are inclined towards the bottoms of the first guide hole 13 and the second guide hole 14 respectively, the materials are all metal materials, and therefore the first contact piece 18 and the second contact piece 19 can be well contacted with the first contact frame 11 and the second contact frame 12 respectively.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. A detachable music box, comprising: 1 main music box (7) and 1 to 8 auxiliary music boxes (8),
the main music box (7) and the auxiliary music box (8) jointly comprise a bottom box (1), a first contact frame (11), a second contact frame (12), a first supporting platform (16), a second supporting platform (17), a first guide hole (13), a second guide hole (14), a parallel resistor (15), a music playing unit (31), a loudspeaker (3), a cylinder (6) and a liquid crystal screen (4), and the auxiliary music box (8) also comprises a first contact piece (18) and a second contact piece (19),
the first supporting platform (16) and the second supporting platform (17) are fixed at the bottom of the bottom box (1), the first contact frame (11) and the second contact frame (12) are respectively fixed on the first supporting platform (16) and the second supporting platform (17), two ends of the parallel resistor (15) are respectively and fixedly connected on the first contact frame (11) and the second contact frame (12),
the main music box (7) also comprises a main controller (71), a main power supply unit (72), a voltage comparison unit (73) and a color LED (74), the main controller (71) is connected with the main power supply unit (72), the keys (5), the music playing unit (31), the voltage comparison unit (73) and the color LED (74) through lines, the auxiliary music box (8) comprises an auxiliary controller (81) and an auxiliary power supply unit (82), the auxiliary controller (81) is connected with the power supply unit, the keys (5) and the music playing unit (31) through lines,
the voltage comparison unit (73) comprises a first comparator, a second comparator, an AND gate circuit, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R11, a resistor R15, a resistor R16, a resistor R17 and a resistor R18, wherein the resistance of the resistor R11 is the same as the resistance of the parallel resistor (15), one end of the resistor R1 is connected with a power supply, the other end of the resistor R1 is connected with the parallel resistor (15) R11, one end of the resistor R2 is connected with the power supply, the other end of the resistor R3 is connected with the ground after being connected with the resistor R3 in series, the other end of the resistor R3 is connected with the positive input end of the first comparator, the negative input end of the first comparator is connected with a point where the resistor R1 and the resistor R11 are connected in series and the positive input end of the second comparator at the same time, one end of the resistor R16 is connected with the power supply, the other end of the resistor R16 is connected with the negative input end of the second comparator and is connected with the ground through the resistor R17, the first comparator and the second comparator are respectively connected with the power supply through the resistor R4 and the resistor R18, the main control circuit, the two input ends of the AND gate are connected with the output end of the AND gate (71),
the resistance values of the resistor R3 and the resistor R17 are calculated and adjusted according to the number of the customized auxiliary music boxes (8), and the method comprises the following specific steps:
step one, calculating the resistance range of a resistor R3 according to the number N of the customized auxiliary music boxes (8), wherein N is an integer and satisfies the requirement
Setting the power supply voltage to VCC, calculating the voltage at the negative input terminal of the first comparator
Step two, when N-1 auxiliary music boxes (8) are connected in parallel, the voltage of the negative input end of the first comparator is calculated
Step three, according to the positive input end voltage of the first comparator, the condition is satisfied
Further calculation results
Step four, calculating the value range of R3, taking R3 as the middle value of the range,
step five, when calculating that 1 main music box (7) is connected with N auxiliary music boxes (8) in parallel, the positive input end voltage of the second comparator
Step six, when calculating that 1 main music box (7) is connected with N +1 auxiliary music boxes (8) in parallel, the positive input end voltage of the second comparator
Step seven, according to the voltage of the negative input end of the second comparator
Satisfies the conditions
Further calculation results
Step eight, calculating the value range of R17, and taking R17 as the middle value of the range;
when the color LED (74) needs to be turned on for illumination, the first contact piece (18) and the second contact piece (19) of the auxiliary music box (8) are respectively aligned with the first guide hole (13) and the second guide hole (14) of the upper-stage music box to be inserted, and respectively contact with the first contact frame (11) and the second contact frame (12) of the main music box (7) or the upper-stage auxiliary music box (8), the auxiliary music boxes (8) with the customized number are sequentially connected in the method, the main controller (71) detects the output level state of the AND gate in real time, when a high level signal is detected, the combined working mode is started, the color LED (74) is turned on, otherwise, when the AND gate outputs a low level, the music boxes are in an independent working mode, and the color LED (74) keeps in an off state.
2. A detachable music box according to claim 1, wherein: the first contact piece (18) and the second contact piece (19) are made of metal materials, and the center distance between the first contact piece and the second contact piece is equal to the center distance between the first guide hole (13) and the second guide hole (14).
3. A detachable music box according to claim 1, wherein: the first supporting table (16) and the second supporting table (17) are made of non-conductive materials.
4. A detachable music box according to claim 1, wherein: the first contact piece (18) and the second contact piece (19) are positioned on the outer side of the bottom box (1) and are inclined planes.
5. A detachable music box according to claim 1, wherein: the first contact frame (11) and the second contact frame (12) are in an oblique strip shape, are respectively inclined towards the bottoms of the first guide hole (13) and the second guide hole (14), and are made of metal materials.
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Application publication date: 20210430 Assignee: Guangxi Keming Technology Development Co.,Ltd. Assignor: GUILIN University OF AEROSPACE TECHNOLOGY Contract record no.: X2023980046905 Denomination of invention: A detachable music box Granted publication date: 20230411 License type: Common License Record date: 20231110 |
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