CN216487268U

CN216487268U - Dumb drum

Info

Publication number: CN216487268U
Application number: CN202122303832.9U
Authority: CN
Inventors: 俞军
Original assignee: Ningbo Hailun Shanggu Education Technology Co ltd
Current assignee: Ningbo Hailun Shanggu Education Technology Co ltd
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2022-05-10
Anticipated expiration: 2031-09-23

Abstract

The utility model discloses a mute drum which comprises an annular shell, and a hitting sheet, a vibration transmitting sheet, first vibration buffering cotton, a bottom shell and second vibration buffering cotton which are sequentially stacked from top to bottom, wherein the hitting sheet, the vibration transmitting sheet, the first vibration buffering cotton, the bottom shell and the second vibration buffering cotton are clamped in the annular shell, a through hole is formed in the center of the first vibration buffering cotton, a buzzer is arranged in the through hole and closely attached to the vibration transmitting sheet, the output end of the buzzer is connected to a main control board, the main control board is arranged in the annular shell, and a through hole matched with a USB interface of the main control board is formed in the annular shell. The user strikes the hitting sheet with the drumstick, the vibration of the hitting sheet is transmitted to the buzzer through the vibration transmission sheet, the buzzer converts mechanical energy into electric energy, signals are transmitted to the main control board, the main control board records the electric energy, and the electric energy is uploaded to devices such as a mobile phone and a computer through the USB. The first cushioning cotton and the second cushioning cotton are used for reducing the sound generated by knocking, and the influence on surrounding personnel is reduced. This scheme is applicable to the drum exercise.

Description

Dumb drum

Technical Field

The utility model relates to a musical instrument for practice, in particular to a dumb drum capable of collecting and uploading striking signals.

Background

The dumb drum is a device for practicing drumming, can avoid drumming and reduce the influence on surrounding personnel. The traditional dumb drum is only a simple rubber plate, and because a user who does not produce sound also can hardly know whether the beating rhythm is accurate or not, the training effect is greatly influenced.

Disclosure of Invention

The utility model mainly solves the technical problem that the beating signals cannot be collected in the prior art, and provides a dumb drum which can convert the beating signals into electric signals for collection and uploading.

The utility model mainly solves the technical problems through the following technical scheme: the utility model provides a mute drum, includes annular shell and from last to down the piece of hitting that stacks gradually, pass and shake piece, first bradyseism cotton, drain pan and second bradyseism cotton, hits the piece, passes and shakes piece, first bradyseism cotton, drain pan and second bradyseism cotton and clamps in annular shell, open at first bradyseism cotton center has the through-hole, is equipped with the buzzing piece in the through-hole, buzzing piece and the inseparable laminating of biography shake piece, and the output of buzzing piece is connected to the main control board, and the main control board is established in annular shell, and last the opening of annular shell has the through-hole that matches with the USB interface of main control board.

When a user uses the electric energy meter, the drum stick is used for knocking the striking piece, the vibration of the striking piece is transmitted to the buzzer piece through the vibration transmission piece, the buzzer piece is a piezoelectric ceramic piece, when the drum stick deforms under the action of external force, the centers of positive charges and negative charges generate relative displacement, different charges are generated on the two faces, the polarization strength is generated, therefore, a potential difference is generated, mechanical energy is converted into electric energy, signals are transmitted to the main control board, the main control board is used for recording, and the signals are uploaded to devices such as a mobile phone and a computer through a USB. First bradyseism cotton and second bradyseism cotton are used for reducing the sound of strikeing and sending, reduce the influence to peripheral personnel, and the drain pan is used for guaranteeing the structural strength of dumb-drum.

Preferably, the striking piece is made of silica gel, the vibration transmission piece is made of plastic, and the striking piece and the vibration transmission piece are tightly attached.

The silica gel material has good elasticity, can simulate the feedback sense of strikeing. The vibration-transmitting sheet made of plastic has higher transmission structure efficiency.

Preferably, the main control board includes a control module, a signal acquisition module, a USB module and a power module, the control module includes an MCU chip, the MCU chip is STM32F030C8, the first end of the 32 foot connecting resistance R76 of MCU chip, the first foot of the 33 foot connecting resistance R75 of MCU chip, the USB module is connected to the second foot of resistance R76 and the second foot of resistance R75, the signal acquisition module is connected to the 10 feet of MCU chip, the buzzer is connected to the input of signal acquisition module, the power module is the power supply of other modules.

The control module converts the signals collected by the signal collection module into digital signals and uploads the digital signals through the USB module.

Preferably, the signal acquisition module includes an interface P4, a buzzer is connected to an interface P4,

pins

1 and 2 of the interface P4 are grounded, pin 3 of the interface P4 is connected to a first end of a resistor R40 through a magnetic bead FB4, a second end of a resistor R40 is connected to an inverting input terminal of the amplifier U2B through a capacitor C26, a first end of the resistor R40 is further grounded through a resistor R42, a second end of the resistor R40 is further grounded through a resistor R43, a non-inverting input terminal of the amplifier U2 43 is grounded, an output terminal of the amplifier U2 43 is connected to an anode of a diode D43, a cathode of the diode D43 is connected to a pin 10 of the MCU chip through a resistor R43, a first end of the capacitor C43 is connected to a pin 10 of the MCU chip, a second end of the capacitor C43 is grounded, the resistor R43 is connected in parallel with a capacitor C43, a first end of the resistor R43 is connected to the inverting input terminal of the amplifier U2 43, a second end of the resistor R43 is connected to a second end of the amplifier U43 through a resistor R43, a second end of the resistor R43 is connected to a second end of the amplifier U43, and a second end of the amplifier U43 is connected to a second end of the resistor R43 through a resistor 43, the anode of the diode D12 and the cathode of the diode D11 are both connected to the first end of the resistor R25, the cathode of the diode D12 is connected to the second end of the resistor R26, the anode of the diode D11 is connected to the second end of the resistor R25, the first end of the capacitor C21 is connected to the first end of the resistor R26, and the second end of the capacitor C26 is connected to the second end of the resistor R25.

The signal acquisition module amplifies the electric signal of the buzzer and then transmits the electric signal to the control module.

Preferably, the USB module includes a USB interface, the USB interface is a 16-pin Type-C interface, A6 pin and a B6 pin of the USB interface are connected to a second end of the resistor R75, a7 pin and a B7 pin of the USB interface are connected to a second end of the resistor R76, the B5 pin of the USB interface is grounded through the resistor R29, the a5 pin of the USB interface is grounded through the resistor R4, the a1 pin, the B1 pin, the a12 pin and the B12 pin of the USB interface are grounded, and the a4 pin, the a9 pin, the B4 pin and the B9 pin of the USB interface are connected to + 5V.

The USB module is connected with the mobile phone through a Type-C interface.

Preferably, the control module further comprises a Debug interface, and

pins

2, 3 and 5 of the Debug interface are respectively connected with

pins

31, 30 and 44 of the MCU chip.

The debugging or firmware upgrading can be carried out on the main control board through the Debug interface.

The utility model has the advantages that the knocking signal can be converted into the digital signal and uploaded, so that the recording of the exercise process is realized, and a basis is provided for the subsequent comparative analysis.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention;

FIG. 2 is a schematic illustration of an explosive structure according to the present invention;

FIG. 3 is a circuit schematic of a control module of the present invention;

FIG. 4 is a circuit schematic of a signal acquisition module of the present invention;

FIG. 5 is a circuit schematic of a USB module of the present invention;

FIG. 6 is a schematic circuit diagram of a power module of the present invention;

in the figure: 1. an annular housing; 2. striking a sheet; 3. a vibration transmitting sheet; 4. first cushioning cotton; 5. a bottom case; 6. second cushioning cotton; 7. a buzzer; 8. a main control panel.

Detailed Description

The technical scheme of the utility model is further specifically described by the following embodiments and the accompanying drawings.

Example (b): the dumb drum of this embodiment, as shown in fig. 1 and 2, including annular shell 1 and from last to stacking gradually down hit piece 2, pass and shake piece 3, first bradyseism cotton 4, drain pan 5 and the cotton 6 of second bradyseism, hit and beat the piece, pass and shake the piece, first bradyseism cotton, drain pan and the cotton clamp of second bradyseism in annular shell, open at first bradyseism cotton center has the through-hole, is equipped with buzzing piece 7 in the through-hole, buzzing piece and pass and shake the piece and closely laminate, the output of buzzing piece is connected to main control board 8, and the main control board is established in annular shell, and it has the through-hole that matches with the USB interface of main control board to open on the annular shell.

The beating sheet is a silica gel beating sheet, the vibration transmission sheet is a plastic vibration transmission sheet, and the beating sheet and the vibration transmission sheet are tightly attached. The silica gel material has good elasticity, can simulate the feedback sense of strikeing. The vibration-transmitting sheet made of plastic has higher transmission structure efficiency.

The main control board comprises a control module, a signal acquisition module, a USB module and a power supply module. As shown in fig. 3, the control module includes an MCU chip, the MCU chip is STM32F030C8, the first end of the 32-pin connecting resistor R76 of the MCU chip, the first pin of the 33-pin connecting resistor R75 of the MCU chip, the USB module is connected to the second pin of the resistor R76 and the second pin of the resistor R75, and the signal acquisition module is connected to the 10 pins of the MCU chip. The control module further comprises a Debug interface, and

pins

2, 3 and 5 of the Debug interface are respectively connected with

pins

31, 30 and 44 of the MCU chip. The input end of the signal acquisition module is connected with the buzzer, and the power supply module supplies power to other modules.

The control module converts the signals collected by the signal collection module into digital signals and uploads the digital signals through the USB module. The debugging or firmware upgrading can be carried out on the main control board through the Debug interface.

As shown in fig. 4, the signal acquisition module includes an interface P4, a buzzer is connected to an interface P4,

pins

1 and 2 of the interface P4 are grounded, pin 3 of the interface P4 is connected to a first end of a resistor R40 through a magnetic bead FB4, a second end of a resistor R40 is connected to an inverting input terminal of the amplifier U2B through a capacitor C26, a first end of the resistor R40 is further grounded through a resistor R42, a second end of the resistor R40 is further grounded through a resistor R43, a non-inverting input terminal of the amplifier U2 43 is grounded, an output terminal of the amplifier U2 43 is connected to an anode of a diode D43, a cathode of the diode D43 is connected to a pin 10 of the MCU chip through a resistor R43, a first end of the capacitor C43 is connected to a pin 10 of the MCU chip, a second end of the capacitor C43 is connected to the second end of the resistor R43, the resistor R43 is connected in parallel with the capacitor C43, a first end of the amplifier U2 43 is connected to the inverting input terminal of the amplifier U43, a second end of the resistor R43 is connected to a second end of the resistor R43 through a resistor R43, a second end of the resistor R43 is connected to a second end of the resistor 43, and a second end of the amplifier U43 is connected to the second end of the amplifier U43, and a second end of the amplifier U43 is connected to the second end of the resistor 43, the anode of the diode D12 and the cathode of the diode D11 are both connected to the first end of the resistor R25, the cathode of the diode D12 is connected to the second end of the resistor R26, the anode of the diode D11 is connected to the second end of the resistor R25, the first end of the capacitor C21 is connected to the first end of the resistor R26, and the second end of the capacitor C26 is connected to the second end of the resistor R25.

As shown in fig. 5, the USB module includes a USB interface, the USB interface is a 16-pin Type-C interface, A6 pin and B6 pin of the USB interface are connected to a second end of the resistor R75, a7 pin and B7 pin of the USB interface are connected to a second end of the resistor R76, the B5 pin of the USB interface is grounded through the resistor R29, the a5 pin of the USB interface is grounded through the resistor R4, the a1 pin, the B1 pin, the a12 pin and the B12 pin of the USB interface are grounded, and the a4 pin, the a9 pin, the B4 pin and the B9 pin of the USB interface are connected to + 5V.

The USB module is connected with the mobile phone through a Type-C interface.

Fig. 6 is a schematic circuit diagram of a power module, which converts a 5V power supply into a 3.3V power supply.

The scheme can convert the knocking signal into a digital signal and upload the digital signal to the mobile phone, so that the recording of the exercise process is realized. The digital signal is compared with a music score APP (original digital signal) on the mobile phone, and the deviation of the comparison result is the percussion level of the experiencer which can be visually identified.

The specific embodiments described herein are merely illustrative of the principles of the utility model. Various modifications, additions and substitutions for the specific embodiments described may occur to those skilled in the art without departing from the spirit of the utility model or its scope, as defined by the appended claims.

Although terms such as buzzer, striker, control module, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to the spirit of the present invention.

Claims

1. The utility model provides a mute drum, its characterized in that includes annular shell and from last to stacking gradually down hits the piece, passes and shakes piece, first bradyseism cotton, drain pan and second bradyseism cotton, hits the piece, passes and shakes piece, first bradyseism cotton, drain pan and second bradyseism cotton and clamps in annular shell, first bradyseism cotton center is opened there is the through-hole, is equipped with the buzzing piece in the through-hole, and the buzzing piece closely laminates with passing and shaking the piece, and the output of buzzing piece is connected to the main control board, and the main control board is established in annular shell, and last the opening of annular shell has the through-hole that matches with the USB interface of main control board.

2. The dumb drum as claimed in claim 1, wherein the striking sheet is a silica gel striking sheet, the vibration transmission sheet is a plastic vibration transmission sheet, and the striking sheet and the vibration transmission sheet are closely attached.

3. The drum dummy according to claim 1 or 2, wherein the main control board comprises a control module, a signal acquisition module, a USB module and a power module, the control module comprises an MCU chip, the MCU chip is STM32F030C8, a 32-pin of the MCU chip is connected with a first end of a resistor R76, a 33-pin of the MCU chip is connected with a first pin of a resistor R75, a second pin of the resistor R76 and a second pin of the resistor R75 are connected with the USB module, a 10-pin of the MCU chip is connected with the signal acquisition module, an input end of the signal acquisition module is connected with a buzzer, and the power module supplies power for other modules.

4. The dummy drum according to claim 3, wherein the signal acquisition module comprises an interface P4, a buzzer is connected with an interface P4, pins 1 and 2 of an interface P4 are grounded, pin 3 of an interface P4 is connected with a first end of a resistor R40 through a magnetic bead FB4, a second end of a resistor R40 is connected with an inverting input terminal of an amplifier U2B through a capacitor C26, a first end of a resistor R40 is further connected with ground through a resistor R42, a second end of a resistor R40 is further connected with ground through a resistor R43, a non-inverting input terminal of an amplifier U2B is connected with ground, an output terminal of an amplifier U2B is connected with an anode of a diode D15, a cathode of the diode D15 is connected with a pin 10 of the MCU chip through a resistor R9, a first end of a capacitor C22 is connected with a pin 10 of the MCU chip, a second end of a capacitor C22 is connected with ground, a resistor R22 is connected in parallel with a capacitor C22, a first end of the resistor R22 is connected with an inverting input terminal of the amplifier U2 22, a second end of the resistor R22 is connected with a second end of the resistor R22 through a resistor 22, the second end of the resistor R25 is connected with the output end of the amplifier U2B, the anode of the diode D12 and the cathode of the diode D11 are both connected with the first end of the resistor R25, the cathode of the diode D12 is connected with the second end of the resistor R26, the anode of the diode D11 is connected with the second end of the resistor R25, the first end of the capacitor C21 is connected with the first end of the resistor R26, and the second end of the capacitor C26 is connected with the second end of the resistor R25.

5. The drum set as claimed in claim 4, wherein the USB module includes a USB interface, the USB interface is a 16-pin Type-C interface, pin A6 and pin B6 of the USB interface are connected with the second end of resistor R75, pin A7 and pin B7 of the USB interface are connected with the second end of resistor R76, pin B5 of the USB interface is grounded through resistor R29, pin A5 of the USB interface is grounded through resistor R4, pins A1, B1, pin A12 and pin B12 of the USB interface are grounded, and pin A4, pin A9, pin B4 and pin B9 of the USB interface are connected with +5V power supply.

6. The drum set according to claim 3, wherein the control module further comprises a Debug interface, and pins 2, 3 and 5 of the Debug interface are respectively connected with pins 31, 30 and 44 of the MCU chip.