CN210629827U

CN210629827U - Loudspeaker box for multimedia music production

Info

Publication number: CN210629827U
Application number: CN201920978994.2U
Authority: CN
Inventors: 薛春峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-05-26
Anticipated expiration: 2029-06-25

Abstract

The utility model provides a multi-media is audio amplifier for music preparation, including the audio amplifier body, the audio amplifier body is a cuboid, the left and right sides on the upside surface of body respectively is provided with a fixed block, the preceding side surface of body has the display screen of rectangle, the display screen top is equipped with volume adjuster, electronic display screen's the below is horizontal equidistant to be provided with a plurality of function button, the volume adjuster left and right sides is provided with a pair of loudspeaker, volume adjuster's top transversely is provided with the metronome, function button's below is provided with microphone interface and earphone hole, the supporting legs of four cuboid forms are installed to the bottom surface four corners symmetry of audio amplifier body, the lower part on the right side surface of audio amplifier body is provided with the interface that charges, the upper portion of the rear side surface of audio amplifier body is provided with the link plate, the below of link plate is provided with the.

Description

Loudspeaker box for multimedia music production

Technical Field

The utility model relates to an audio amplifier technical field specifically is an audio amplifier is used in preparation of multimedia music.

Background

The sound box is a device for converting an audio signal into sound, and in popular speaking, the sound box is a sound box main machine box body or a bass box body which is internally provided with a power amplifier, at present, digitalized sound equipment is increasingly popularized, sound box equipment matched with the digitalized sound box equipment also rapidly enters thousands of households, people generally know music theory knowledge at present, and the requirements for making simple music or recomposing the music are large, so that the music editing equipment such as a midi keyboard and the like, and the sound equipment, the computer and the like matched with the midi keyboard and the like also enter common people.

For general song-composing enthusiasts, there is a problem that midi keyboards generally need to be connected with computers and special sound boxes for use, otherwise, playing and storing of songs are not easy to realize, which is easy to realize at home, but if the midi songs are on business trip, out-of-home and the like, the midi songs are expected to be realized through portable equipment, which is difficult to realize. At present, many APPs enable people to use a mobile phone or a pad to cooperate with a midi keyboard to compile music, and one otg patch cord can realize that the midi keyboard is connected with the mobile phone to compile music, but the playing-out functions of the mobile phone and the pad are generally poor, so that a good playing-out effect is difficult to realize.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a audio amplifier is used in preparation of multimedia music, it is emphatic portable characteristic, is suitable for the cell-phone PAD of arranging midi keyboard connection in any occasion, just can realize the better effect of putting outward when compiling song, for compiling song in various occasions in a flexible way and providing the condition.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a audio amplifier is used in preparation of multimedia music, includes the audio amplifier body, its characterized in that: the loudspeaker box comprises a loudspeaker box body, wherein the loudspeaker box body is a cuboid which is close in height and width and slightly flat in front-back distance, the left side and the right side of the upper side surface of the loudspeaker box body are respectively provided with a cylindrical fixed block, the middle part of the front side surface of the loudspeaker box body is transversely provided with a rectangular electronic display screen, a volume regulator is arranged above the electronic display screen, a plurality of function buttons are transversely arranged at equal intervals below the electronic display screen, the left side and the right side of the volume regulator are provided with a pair of loudspeakers, a metronome is transversely arranged above the volume regulator, a microphone interface and an earphone hole are arranged below the function buttons, four rectangular supporting legs are symmetrically arranged at four corners of the bottom surface of the loudspeaker box body, a charging interface is arranged at the lower part of the right side surface of the loudspeaker box body, and a hanging plate is, a shock absorption plate is arranged below the hanging plate, and a plurality of suckers are arranged on the rear side surface of the shock absorption plate in an array manner; the enclosure of the sound box body is selected from one of MDF medium density fiberboard, plywood or solid wood board, and the enclosure has a thickness of more than 5 mm.

The plurality of function buttons comprise a Bluetooth adaptation button, a metronome switch button, a metronome setting button and a metronome adjusting button.

A layer of damping sound film with the thickness of about 3mm is adhered to the inner surface of the sound box body through 3M glue.

The loudspeaker is provided with a central core, a bass definition sheet, a middle-high vibration film and a central core, wherein the central core is arranged at the center of the loudspeaker, and the middle-high vibration film is arranged on the inner surface of the sound outlet surface of the loudspeaker; the middle core is approximately cylindrical, and the side surface of the middle core is wrapped with a layer of bass vibration film.

The sound box body is internally provided with a PCB which is fixed on the inner surface of the front side of the sound box body by fixing bolts at four corners, the PCB is parallel to the inner surface of the front side of the sound box body, and the upper edge of the PCB is as high as the upper edge of the electronic display screen; a Bluetooth device connector is fixed in the middle of the PCB and powered by a circuit on the PCB, and the Bluetooth device connector is connected with the Bluetooth adaptive button; the volume adjuster is connected to a damping type volume adjusting circuit part in a sound output circuit on the PCB, and the sound output circuit is connected with the damping part of the volume adjuster and outputs electric signals to a pair of loudspeakers; the bass boost button and treble boost button are connected to the sound output circuit.

The loudspeaker box comprises a loudspeaker box body and is characterized in that a 8000mA lithium battery is fixed at the bottom inside the loudspeaker box body, a first power supply interface of the lithium battery is connected to a power supply interface of a PCB (printed circuit board), a second power supply interface of the lithium battery is connected to a power supply interface of a pair of loudspeakers, and a charging interface of the lithium battery is connected to the charging interface through an extension line.

Preferably, the eight corners of the sound box body are rounded and have no sharp shape.

Preferably, the charging interface is a micro charging interface or a type-c charging interface.

Preferably, the fixed block is provided with two, two the material of fixed block all sets up to the stainless steel, two the lower part of fixed block all has a self tapping screw portion that is stainless steel together for attack in the blind hole of two reservations on audio amplifier body upside surface in order to realize threaded connection, two 2 upper portion centers of fixed block department respectively has an integral type pull ring, and a fag end both ends are tied on two integral type pull rings.

Preferably, the supporting legs are made of one of deep color PVC or rubber wood or rubber coated with galvanized iron sheet, and are adhered to the bottom surface of the sound box body through strong glue.

Preferably, the damping plate is made of milky white butyl rubber, a plurality of buffer springs perpendicular to the back surface are connected between the damping plate and the back surface of the sound box body in an array mode, the length of each buffer spring is 3-10cm, the outer diameter of each buffer spring is not larger than 2cm, the front end of each buffer spring is sleeved on a fixing column vertically extending out of the back side surface of the sound box body, the thread head at the foremost end of each buffer spring is inserted into a fixing pin at the root of the fixing column and reversely bent and hooked, and the rear end of each buffer spring is connected with the damping plate.

Preferably, the material of link plate sets up to the stainless steel, the link plate front end inserts in the horizontal groove that the rear side surface of audio amplifier body 1 leaned on the upper portion, and both sides all are stained with the damping plate of butyl rubber system about this horizontal groove in order to keep the fixed of male link plate, the link plate sets up to "L" shape that front end level and rear end were upwarped perpendicularly, still has the link plate groove that the rear end can be fixed, and this link plate groove is the regular quadrangular prism form that falls and inside cavity, and the side is the square, openly leans on the lower part to have a height to be about the slot of link plate thickness twice, link plate groove rear portion has a plurality of screw hole.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model has small volume, and the rope belt is arranged above the sound box body, so that the sound box is convenient to carry; the utility model discloses solved the fixed problem of audio amplifier betterly, the convenience that link plate and link plate groove combined is firm moreover, and the audio amplifier is because relatively flat, is not suitable for vertical placing on the table, hangs here on the wall, effectively combines with the wall through a plurality of sucking discs and shock attenuation board for the audio amplifier can not produce excessive vibration, can play sound well.

2. The utility model discloses be provided with the metronome, often unable simultaneous start-up metronome when cell-phone or pad switch to the app of using the midi keyboard, this metronome can show the beat, and can every beat send buzzing prompt tone for play and compile music and play prompt effect.

3. The utility model discloses the bottom is provided with the supporting legs, and the placing of this audio amplifier of being convenient for can play absorbing effect, and the rear side of audio amplifier body is provided with the link plate, and link plate groove combine, can hang this audio amplifier on the wall, save space, and the sucking disc of shock attenuation board rear side makes this audio amplifier hang stably on the wall, within sucking disc embedding shock attenuation board, shock attenuation board itself to and the buffer spring between shock attenuation board and the audio amplifier body can effectually alleviate the vibrations that the audio amplifier during operation produced.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic side view of the present invention.

Fig. 3 is a schematic view of the back structure of the present invention.

In the figure: 1. the loudspeaker box comprises a loudspeaker box body, 2, a fixing block, 3, a rope belt, 4, an electronic watch, 5, a volume adjuster, 6, a loudspeaker, 7, an electronic display screen, 8, a function button, 9, a fixing bolt, 10, a microphone interface, 11, supporting legs, 12, a charging interface, 13, a damping plate, 14, a buffer spring, 15, a sucker, 16, a hanging plate, 17, a hanging hole, 18, an earphone hole, 19, a PCB (printed circuit board), 21 and a lithium battery.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides an embodiment: the utility model provides a audio amplifier is used in preparation of multimedia music, includes audio amplifier body 1, its characterized in that: the sound box body 1 is a cuboid which is close in height and width and slightly flat in front-back distance, the shape is convenient to hang on a wall, the left side and the right side of the upper side surface of the sound box body 1 are respectively provided with a cylindrical fixed block 2, the middle part of the front side surface of the sound box body 1 is transversely provided with a rectangular electronic display screen 7, a volume regulator 5 is arranged above the electronic display screen 7, a plurality of function buttons 8 are transversely arranged at equal intervals below the electronic display screen 7, the left side and the right side of the volume regulator 5 are provided with a pair of loudspeakers 6, a metronome 4 is transversely arranged above the volume regulator 5, a microphone interface 10 and an earphone hole 18 are arranged below the function buttons 8, four cuboid-shaped supporting legs 11 are symmetrically arranged at four corners of the bottom surface of the sound box body 1, and a charging interface 12 is arranged at the lower part of the right side surface of the sound box body 1, a hanging plate 16 is arranged at the upper part of the rear side surface of the sound box body 1, a shock absorption plate 13 is arranged below the hanging plate 16, a plurality of suckers 15 are arranged on the rear side surface of the shock absorption plate 13 in an array manner, the suckers are made of transparent plastic materials such as PC, PP and the like, and are fixed on the shock absorption plate 13 in a manner that the root parts of the suckers are embedded into preset grooves; the shell of the sound box body 1 is selected from one of MDF medium density boards, plywood or solid wood boards, and any part of the shell has the thickness of more than 5 mm; the microphone port 10 is, for example, a cannon XLR port or a TRS port and is connected to an adapter port on the PCB board, and the earphone hole 18 is connected to a 3.5mm audio port on the PCB board and to an adapter port on the PCB board.

The display screen is, for example, a commercially available product such as L320240A, COG12864TM545A, COG12864TM75A, T12232A, etc., acquires the percentage of the current output volume from the sound output circuit on the PCB and displays the percentage, and the display screen obtains and displays the information about whether the bluetooth device is connected or not and the name of the connected device from the bluetooth device connector. The metronome comprises a simple LED backlight display module, such as T12232A, a buzzer and a singlechip with a storage function, such as an MCU singlechip.

The plurality of function buttons 8 comprise a Bluetooth adaptation button, a metronome switch button, a metronome setting button and a metronome adjusting button, the metronome switch button is used for switching the metronome, the metronome setting button can be switched between an X/Y beat setting state and a non-setting/determining state when being pressed, X is a small beat number, Y is a beat with a few minutes of notes, for example, 6/8 beats down, the metronome setting button is pressed until X flickers, the metronome adjusting button is pressed and adjusted to be 6, then the metronome setting button is pressed, and the metronome adjusting button is pressed and adjusted to be 8; the functional buttons can be further expanded here, and there can be more than the above four buttons, for example, including a main power switch for cutting off the output current from the lithium battery.

A layer of damping sound film with the thickness of about 3mm is adhered to the inner surface of the sound box body 1 by 3M;

the loudspeaker 6 is provided with a central core, a bass definition sheet, a middle-high vibration film, wherein the central core is arranged at the center of the loudspeaker, and the middle-high vibration film is arranged on the inner surface of the sound outlet surface of the loudspeaker; the central core is approximately cylindrical, and the side surface of the central core is wrapped with a layer of bass vibration film; the loudspeaker can have a general full-frequency output effect, low-frequency sound and high-frequency sound can meet general requirements, sound breaking is avoided, the loudspeaker can be manufactured by using commercially available materials in a self-made mode as in the above configuration mode, a commercially available small full-frequency loudspeaker meeting the above requirements can also be purchased for installation, a general middle core of a commercially available product cannot be completely wrapped by a low-frequency vibrating diaphragm, and the loudspeaker can be automatically processed on the basis of the commercially available product.

The sound box body 1 is internally provided with a PCB which is fixed on the inner surface of the front side of the sound box body 1 by fixing bolts at four corners, the PCB is parallel to the inner surface of the front side of the sound box body 1, and the upper edge of the PCB is consistent with the upper edge of the electronic display screen 7 in height; a Bluetooth device connector is fixed in the middle of the PCB and powered by a circuit on the PCB, and is connected with the Bluetooth adaptive button, specifically, when the Bluetooth adaptive button is pressed down, an on-board trigger switch of the Bluetooth device connector on the PCB is triggered, wherein the Bluetooth device connector is default to be set to be matched by pressing the button for 3 seconds, and the power supply of the connector is cut off by pressing the button for more than 10 seconds; the volume adjuster 5 is connected to a damping type volume adjusting circuit part in a sound output circuit on the PCB, the damping part is a damping resistance circuit and can be fixedly connected to the PCB by adopting a commercially available product, the position of the volume potentiometer connected to the damping is changed by rotating a knob, so that the volume is adjusted, and the sound output circuit is connected with the damping part of the volume adjuster 5 and outputs an electric signal to a pair of loudspeakers 6; the bass boost button and treble boost button are connected to the sound output circuit.

The inside bottom of audio amplifier body 1 is fixed with a 8000mA lithium cell, and the first power supply interface of lithium cell is connected to PCB board power source, and the second power supply interface of lithium cell is connected to the power supply interface of a pair of loudspeaker, and the interface that charges of lithium cell is connected to with the extension line interface 12 that charges. The first power supply port and the second power supply port are usb lead-out power supply ports, and the direct-current power supply voltage is between 2 and 5 v.

Eight corners of the sound box body 1 are smooth and have no sharp shape. Thus avoiding collision damage and injury to people.

The charging interface 12 is a micro charging interface or a type-c charging interface, and the two interfaces can be adapted to the most common wires, so that the battery can be charged conveniently.

Fixed block 2 is provided with two, two the material of fixed block 2 all sets up to the stainless steel, two the lower part of fixed block 2 all has a self tapping screw portion that is stainless steel together for attack in the blind hole of two reservations on 1 side surface of audio amplifier body, the size of two blind holes is little less than self tapping screw portion, two 2 upper portion centers of fixed block department respectively has an integral type pull ring, and 3 both ends of a fag end are tied on two integral type pull rings. The integrated pull ring is in a semicircular ring shape and is adhered to the adaptive blind hole on the fixing block 2 by 3M glue to keep relative fixation.

The supporting legs 11 are made of one of deep color PVC or rubber wood or rubber coated with galvanized iron sheet, and the supporting legs 11 are adhered to the bottom surface of the sound box body 1 through super glue or 3M glue.

The material of shock attenuation board 13 sets up to milk white butyl rubber material, be connected with the buffer spring 14 at a plurality of perpendicular to backs between the back of shock attenuation board 13 and audio amplifier body 1 in array, each buffer spring 14's length is between 3-10cm, and the external diameter is not more than 2cm, each buffer spring 14's front end cover is on the fixed column that the rear side surface of audio amplifier body 1 stretches out perpendicularly, just buffer spring 14's foremost end screw inserts in a fixed pin of fixed column root and the inflection hooks, buffer spring 14's rear end is connected with shock attenuation board 13. The length of above-mentioned spring sets up to, stretches into the hanging board inslot and when the body is vertical at the link plate, sucking disc 15 can not very tight top on the wall, at this moment power slightly, closely laminate the sucking disc that arranges the array on the wall, accomplished the shockproof and fixed of audio amplifier body.

The material of link plate 16 sets up to the stainless steel, link plate 16 front end inserts in the horizontal groove that the rear side surface of audio amplifier body 1 leaned on the upper portion, and the damping plate that butyl rubber made is all stained with on both sides about this horizontal groove is with keeping the fixed of the link plate 16 of male, and here horizontal groove is not shown, but the skilled person in the art can understand, so adopt great power to insert the horizontal part of link plate in the horizontal groove, the damping plate on upper and lower two sides can keep the relatively fixed of link plate, link plate 16 sets up to "L" shape that the front end level and rear end are upwarped perpendicularly, still has the link plate groove 19 that the rear end can be fixed, and this link plate groove 19 is the regular quadrangular prism form that falls and inside cavity, and the side is the square, and the front leans on the lower part to have a groove that highly is about link plate 16 thickness twice, link plate groove 19 rear portion has a plurality of screw hole. Through these a plurality of screw hole, hanger plate groove 19 is fixed on the wall, and when using, holds roughly the level form with the body for the L shape perk portion of hanger plate 16 stretches into the hanger plate groove, and it is vertical to slowly make the body again, and L shape perk portion has just hooked the preceding part in hanger plate groove like this, makes relatively fixed.

The working principle is as follows: the utility model discloses when using, it is right to need the utility model discloses carry out simple structure and know, audio amplifier body 1's top is provided with fag end 3, be convenient for mention audio amplifier body 1 through fag end 3, make audio amplifier body 1 portable, 1 bottom of audio amplifier body is provided with supporting legs 11, be convenient for place audio amplifier body 1 on the desk, the material of supporting legs 11 is rubber, audio amplifier body 1's rear side surface is provided with link plate 16, link plate 16 can insert link plate groove 19, can hang audio amplifier body 1 on the wall through link plate groove 19, save space, the sucking disc 15 of shock attenuation board 13 rear side, sucking disc 15 adsorbs on the wall, buffer spring 14 between shock attenuation board 13 and the audio amplifier body 1 can effectually alleviate the vibrations that audio amplifier body 1 during operation produced, make audio amplifier body 1 hang stably on the wall. The length of above-mentioned spring sets up to, stretches into the hanging board inslot and when the body is vertical at the link plate, sucking disc 15 can not very tight top on the wall, at this moment power slightly, closely laminate the sucking disc that arranges the array on the wall, accomplished the shockproof and fixed of audio amplifier body.

The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a audio amplifier is used in preparation of multimedia music, includes audio amplifier body (1), its characterized in that: the loudspeaker box comprises a loudspeaker box body (1), wherein the loudspeaker box body (1) is a cuboid which is approximate in height and width and slightly flat in front-back distance, the left side and the right side of the upper side surface of the loudspeaker box body (1) are respectively provided with a cylindrical fixed block (2), the middle of the front side surface of the loudspeaker box body (1) is transversely provided with a rectangular electronic display screen (7), a volume adjuster (5) is arranged above the electronic display screen (7), a plurality of function buttons (8) are transversely arranged at equal intervals below the electronic display screen (7), the left side and the right side of the volume adjuster (5) are provided with a pair of loudspeakers (6), a metronome (4) is transversely arranged above the volume adjuster (5), a microphone interface (10) and an earphone hole (18) are arranged below the function buttons (8), four rectangular supporting legs (11) are symmetrically arranged at four corners of the bottom surface of the loudspeaker box body (1), a charging interface (12) is arranged at the lower part of the right side surface of the sound box body (1), a hanging plate (16) is arranged at the upper part of the rear side surface of the sound box body (1), a damping plate (13) is arranged below the hanging plate (16), and a plurality of suckers (15) are arranged on the rear side surface of the damping plate (13) in an array manner; the shell of the sound box body (1) is selected from one of an MDF medium density board, a plywood or a solid wood board, and the shell has a thickness of more than 5 mm;

the plurality of function buttons (8) comprise a Bluetooth adaptation button, a metronome switch button, a metronome setting button and a metronome adjusting button;

a layer of damping sound film with the thickness of about 3mm is adhered to the inner surface of the sound box body (1) by 3M;

the loudspeaker (6) is provided with a central core, a bass definition sheet, a middle and high sound vibrating diaphragm, wherein the central core is arranged at the center of the loudspeaker, and the middle and high sound vibrating diaphragm is arranged on the inner surface of the sound outlet surface of the loudspeaker; the central core is approximately cylindrical, and the side surface of the central core is wrapped with a layer of bass vibration film;

the sound box comprises a sound box body (1), wherein a PCB fixed on the inner surface of the front side of the sound box body (1) through fixing bolts at four corners is arranged in the sound box body (1), the PCB is parallel to the inner surface of the front side of the sound box body (1), and the upper edge of the PCB is consistent with the upper edge of an electronic display screen (7) in height; a Bluetooth device connector is fixed in the middle of the PCB and powered by a circuit on the PCB, and the Bluetooth device connector is connected with the Bluetooth adaptive button; the volume adjuster (5) is connected to a damping type volume adjusting circuit part in a sound output circuit on the PCB, and the sound output circuit is connected with the damping part of the volume adjuster (5) and outputs electric signals to a pair of loudspeakers (6); the bass boost button and the treble boost button are connected to the sound output circuit;

the inside bottom of audio amplifier body (1) is fixed with a 8000mA lithium cell, and the first power supply interface of lithium cell is connected to PCB board power interface, and the second power supply interface of lithium cell is connected to the power supply interface of a pair of loudspeaker, and the interface that charges of lithium cell is connected to with the extension line interface that charges (12).

2. The speaker box for multimedia music production according to claim 1, wherein: eight corners of the sound box body (1) are smooth and have no sharp shape;

the charging interface (12) is a micro charging interface or a type-c charging interface.

3. The speaker box for multimedia music production according to claim 1, wherein: fixed block (2) are provided with two, two the material of fixed block (2) all sets up to the stainless steel, two the lower part of fixed block (2) all has one with self tapping screw portion for stainless steel for attack in the blind hole of two reservations on audio amplifier body (1) side surface, two in order to realize threaded connection fixed block (2) upper portion center department respectively has an integral type pull ring, and a fag end (3) both ends are tied on two integral type pull rings.

4. The speaker box for multimedia music production according to claim 1, wherein: the support legs (11) are made of one of deep color PVC or rubber wood or rubber coated with galvanized iron sheets, and the support legs (11) are adhered to the bottom surface of the sound box body (1) through strong glue.

5. The speaker box for multimedia music production according to claim 1, wherein: the material of shock attenuation board (13) sets up to milk white butyl rubber material, be connected with buffer spring (14) at a plurality of perpendicular to backs between the back of shock attenuation board (13) and audio amplifier body (1) array, each buffer spring (14) length is between 3-10cm, and the external diameter is not more than 2cm, each buffer spring (14) front end cover is on the fixed column that the rear side surface of audio amplifier body (1) stretches out perpendicularly, just buffer spring (14) foremost end screw insert in the fixed pin of fixed column root and the inflection is hooked, buffer spring (14)'s rear end is connected with shock attenuation board (13).

6. The speaker box for multimedia music production according to claim 1, wherein: the material of link plate (16) sets up to the stainless steel, the rear side surface that link plate (16) front end inserted audio amplifier body (1) leans on the horizontal groove at upper position, and both sides all are stained with the damping plate of butyl rubber system about this horizontal groove in order to keep the fixed of male link plate (16), link plate (16) set up "L" shape that front end level and rear end were upwarped perpendicularly, still have rear end fixable's link plate groove (19), and this link plate groove (19) are the regular quadrangular form and the inside cavity of falling, and the side is the square, openly leans on the lower part to have a height to be about the slot of link plate (16) thickness twice, link plate groove (19) rear portion has a plurality of screw hole.