KR101884610B1 - Expandable digital amplifier with lightweight modular case - Google Patents

Abstract

The present invention relates to a rack mount type digital amplifier. More specifically, the rack mount type digital amplifier is configured such that support fixing bars are fastened to upper and lower sides of front and rear sides between side plates separated from each other, an upper plate and a lower plate are fastened by using the support fixing bars and the side plates, a circuit substrate having an expandable connector and an electric wire connection hole is coupled to the support fixing bar at the back side, and the rear plate is coupled to a rear side of the circuit substrate, such that an individual amplifier module is inserted through a space between the support fixing bars at the front side, and then, is mounted and fixated through the support fixing bars at the front side while being connected with the circuit substrate. Accordingly, durability of the entire modular case is remarkably enhanced by the side plates having robust rigidity and the support fixing bars connecting the side plates from the four sides, such that it is possible to prevent other individual amplifier modules from moving or having a connection failure when one individual amplifier module adjacent to the other individual amplifier modules is inserted or separated. The individual amplifier module which is to be guided and inserted to an accurate position is inserted into a case and connected with the circuit substrate at the same time, such that the individual amplifier module can be used alone. It is possible to configure parallel type expandable amplifiers according to the number of mounted individual amplifier modules. Therefore, the number of individual amplifier modules can be varied depending on an installation purpose or an installation location of a digital amplifier, thus, it is possible to efficiently and economically install the amplifiers.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an expandable digital amplifier with a lightweight modular case,

The present invention relates to a rack-mounted digital amplifier, and more particularly, to a digital amplifier module used for various broadcasting equipment or sound equipment, which can be expanded in parallel by a single or a plurality of amplifier modules using a lightweight modular case Of course, this is a scalable digital amplifier that enables stable mounting of multiple digital amplifier modules due to a modular, lightweight modular case, and stable operation without shaking even when vibration or shock is applied.

In general, digital PA (Public Address) amplifiers are used for announcements in public buildings such as schools, churches, playgrounds, public offices or subway stations, unlike home audio and devices.

Here, the digital amplifier used in the above-mentioned announcement broadcasting apparatus is typically mounted in a cabinet having a rack-mounted structure and connected together with various equipment. In the rack-mounted cabinet, a keyboard, a monitor, a computer, And an automatic position controller, a voice automatic broadcasting unit, a remote broadcasting interface, a fire broadcast unit, and a surveillance auditor are mounted.

In the case of the above digital amplifier, a single-unit digital amplifier module may be used or a plurality of digital amplifier modules may be connected in parallel in accordance with a required output standard. In this case, the digital amplifier module may be mounted in a cabinet of the rack- It is common that a single or a plurality of digital amplifier modules are simultaneously mounted in a case.

In the case of a conventional digital amplifier and an amplifier case for accommodating the same, an inner groove is formed on the lower side of the upper surface, and a lower portion of the inner groove is formed to be inclined so as to form a spiral hole in the center, as shown in Japanese Utility Model Registration No. 20-1991-0004242 , And the side surface of the other side is formed with the same size as the upper surface of the upper surface protruding portion and the "A" -shaped groove is formed at the lower side of the side surface and the bolt hole is drilled. The assembly of the amplifier case has been found so that it can be made.

Further, in the case of the Utility Model Laid-open No. 20-1995-0002507, a front panel having a plurality of insertion holes formed at the step side by bending the step to be formed at an upper part thereof, and an insertion protrusion coupled to the insertion hole formed on the front panel And the front panel is coupled to the main chassis so that the stepped portions formed on the front panel are bent over the top ends of the main chassis and are assembled through the screws, The assembly structure of the amplifier case has been devised so that the assembly can be easily assembled without using a fastener such as a screw or the like so as not to expose the fastener.

In addition, in the case of Registration Practical Utility Model No. 20-0443205, the radiating bar of the amplifier device is directly connected to the frame having one side by the radiating plate formed with the radiating vane, and the heat generated from the amplifiers attached to the radiating bar is transferred to the radiating plate of the frame, Since the heat dissipation function can be provided, the heat dissipation area can be greatly increased to improve the heat dissipation effect. As the heat dissipation capacity increases, the output capacity can be easily increased by adding an amplifier in the form of add- , The heat dissipation ability has been improved so that the amplifier can be expanded as an add-on card, so that it is not necessary to replace the entire system when it is necessary to expand the output after the system is installed. Expandable Amplifier Devices have been developed and registered for expansion. .

In addition, in the case of Japanese Patent No. 10-1080534, at least one digital amplifier having an overcurrent protection function according to parallel connection; And a mother case for receiving the at least one digital amplifier connected in parallel, wherein the digital amplifier comprises: an ADC circuit section for converting an analog signal into a digital signal; A DSP (Digital Signal Processor) circuit unit for processing the digital signal; A PWM circuit section for modulating a pulse width of the digital signal; A power stage circuit unit for amplifying the modulated signal through the PWM circuit unit; A matching transformer circuit portion for matching the impedance with the speaker; SMPS for power supply; And a control unit (MICOM) for controlling the DSP and the amplifier protection function. The parallel-connected high-impedance PA amplifiers have been registered and registered.

However, in the case of the conventional expansion type digital amplifier as described above, it is not possible to mount and separate the case between the case and the amplifier module in the process of attaching and detaching the individual digital amplifier module. Therefore, It is often the case that an operation failure or malfunction occurs due to the coupling.

Also, in the process of mounting the above-mentioned digital amplifier in a cabinet of a rack-mount structure, the amplifier case is not rigid, so that the connection state of the built-in amplifier module becomes poor or deformation of the case occurs. The case is manufactured by bending a plate material or by assembling a plurality of divided plate members by joining or bolt-fixing the case, so that the above-mentioned amplifier case has a serious disadvantage.

Particularly, in the case of a conventional parallel expanding type amplifier, when a plurality of amplifier modules are to be used, a circuit board for connecting the respective amplifier modules, that is, a control means is additionally provided and connected to the respective amplifier modules In the case of the above-described parallel control means, since it is separately installed in the cabinet of the rack mount structure, expansion or contraction of the amplifier module is very cumbersome and inconvenient.

Korea Utility Model Notification 20-1991-0004242 (Notice of June 29, 1991) Korea Utility Model Disclosure 20-1993-0002507 (Published April 1, 1995) Korea Registered Utility Model 20-0443205 (Registered on January 14, 2009) Korean Registered Patent No. 10-1080534 (registered on 31st October, 2011)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems as described above, and it is an object of the present invention to provide an apparatus and a method for assembling the upper plate and the lower plate by fastening the supporting and fixing bars to the upper and lower sides, And a circuit board having an expansion connector and a wire connection port is coupled to the rear support fixing bar, and a back plate is coupled to the rear side of the circuit board, so that an individual amplifier module is inserted through the front support support bars, And the individual amplifier module is mounted and fixed via the front support fixing bar while being connected to the substrate,

The rigid rigid extruded support bars enhance the overall durability of the modular case and allow the individual amplifier modules to be guided into the correct positions through the top and bottom plates, while the parallel expansion of the digital amplifiers The present invention has been made in view of the above problems, and it is an object of the present invention to provide an expandable digital amplifier using a lightweight modular case.

According to an aspect of the present invention for achieving the above object, there is provided a heat exchanger comprising: a support fixing bar formed at a front side, a rear side, and a lower side between two side plates spaced apart from each other; Wherein a circuit board having an extension connector facing inward and a wire connection port directed to the outside is coupled to the rear support fixing bar and the wire connection port is inserted into a rear side of the circuit board, A thick plate having a through hole formed therein,

And the individual amplifier module is connected to the extension connector of the circuit board while the individual amplifier module is fixed to the front support bar.

The present invention can greatly improve the durability of the entire modular case by the rigid rigid side plate and the support and fixing bars connecting the side plates in all directions, so that the adjacent individual amplifier modules can be moved or connected It is possible to prevent the occurrence of defects and the individual amplifier module to be guided and inserted into the correct position is inserted into the case and connected to the circuit board. Therefore, individual amplifier modules can be used alone, and the number of individual amplifier modules Therefore, it is possible to construct a parallel-type expansion type amplifier, so that the number of the individual amplifier modules can be varied according to the installation purpose or the installation place of the digital amplifier, so that the most efficient and economical type of amplifier can be installed.

1 is an overall perspective view of a digital amplifier according to the present invention;
FIG. 2 is a diagram showing the overall case isolation of the digital amplifier according to the present invention
3 is a perspective view of an individual amplifier module of a digital amplifier according to the present invention
4 is a side view of the entire cross-section of the digital amplifier according to the present invention
5 is a front cross-sectional view of a digital amplifier according to the present invention
FIG. 6 is a rear cross-sectional view of a digital amplifier according to the present invention
FIG. 7 is an enlarged perspective view of a support fixing bar of a digital amplifier according to the present invention.
FIG. 8 is a detailed view of the connection between the side plate and the support fixing bar of the digital amplifier according to the present invention
9 is a detailed view of the circuit board and the supporting and fixing bar of the digital amplifier according to the present invention
Fig. 10 is a detail view showing the coupling between the side plate and the back plate of the digital amplifier according to the present invention
11 is a detailed view of the upper and lower plate coupling of the digital amplifier according to the present invention
12 is an enlarged cross-sectional view of the upper and lower plate coupling portions of the digital amplifier according to the present invention
13 is a flowchart illustrating a process of inserting an individual amplifier module of a digital amplifier according to the present invention
Fig. 14 is an example of use of the digital amplifier according to the present invention

Further objects, features and advantages of the present invention will become more apparent from the following detailed description and the accompanying drawings.

Before describing the present invention in detail, it is to be understood that the present invention is capable of various modifications and various embodiments, and the examples described below and illustrated in the drawings are intended to limit the invention to specific embodiments It is to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Also, when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may be present in between . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Also, the terms " part, "" unit," " module, "and the like, which are described in the specification, refer to a unit for processing at least one function or operation, Software. ≪ / RTI >

In the following description of the present invention with reference to the accompanying drawings, the same components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof will be omitted. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a perspective view of an individual amplifier module of a digital amplifier according to the present invention, and FIG. 4 is a perspective view of the digital amplifier according to the present invention. FIG. 5 is a front cross-sectional view of the digital amplifier according to the present invention, FIG. 6 is a rear cross-sectional view of the digital amplifier according to the present invention, and FIG. 7 is a cross- Is an enlarged perspective view.

As shown in the drawing, the digital amplifier according to the present invention is formed by assembling a modular case by using a lightweight non-ferrous metal such as aluminum to bend or extrude the side plates 10 and 10 ' The support bars 20 and 20 'are fastened to the front and back sides of the side plates 10 and 10' in a state where the side plates 10 'are spaced apart from each other.

The upper and lower plates 30 and 30 'having the same shape are fastened and coupled to the upper and lower portions by using the side plates 10 and 10' and the supporting and fixing bars 20 and 20 ' The digital amplifier modular case of the present invention can be completed by sequentially forming the circuit board 40 and the thick plate 50 by using the fixing bars 20 and 20 ' By inserting and mounting a plurality of individual amplifier modules 60 and 60 ', an expandable digital amplifier of the present invention is produced.

Here, the side plates 10 and 10 'have a plurality of fastening pins 12 and 12' formed on the back side, that is, one side facing the inside of the modular case, with the bolt holes 11 passing therethrough, And the fastening pins 12 and 12 'are used for the purpose of engaging the thick plate 50 described above.

The supporting and fixing bars 20 and 20 'are formed by extrusion molding of metal. The supporting and fixing bars 20 and 20' are formed with openings 21 having one side opened along the longitudinal direction. And a fastening hole 23 is formed along the longitudinal direction at an inner end of the opening 21 so that the length of the insertion hole 22 is set to a length Is formed by inserting a separate fastening fixture (25) in which repeated screw holes (24) and (24 ') are formed along the direction.

Therefore, the repeated screw holes 24 and 24 'of the fastening fixture 25 are exposed through the openings 21 of the support and fixing bars 20 and 20' 24 'can be used to mount or fix the individual amplifier modules 60, 60' or fix the circuit board 40 by using the screw holes 24, 24 ' So that the individual amplifier modules 60 and 60 'or the circuit board 40 can be easily mounted and fixed at the best position.

The upper and lower plates 30 and 30 'are provided with heat dissipation holes 31 and 31' repeatedly arranged longitudinally and transversely on the entire surface thereof. Modules 31 and 31 ' The guide protrusions 32 and 32 'are protruded inwardly by cutting and bending in the direction from the front surface to the back surface of the case. The guide protrusions 32 and 32' The individual amplifier modules 60 and 60 'of the inserting process due to the protruding formed guide protrusions 32 and 32' serve as guides for inserting the individual amplifier modules 60 and 60 ' , It is possible to slide and insert straight without moving to the right.

Upwardly bent coupling flanges 33 and 33 'are formed at both ends of the upper and lower plates 30 and 30' so that they can be bolted to the side plates 10 and 10 ' And fixing flanges 34 and 34 'are formed at the front and rear ends of the upper and lower plates 30 and 30', respectively. The fixing flanges 34 and 34 'are formed on the upper surfaces of the front support bar 20 and the rear support bar 20' And it is possible to maintain a firmly fastened state by the fastening flanges 33 and 33 'as well as to secure the heat dissipation holes 31 and 31' by the upwardly bent fastening flanges 34 and 34 ' 'Can be disposed at a position lower than the surface of the modular case so that the heat-releasing holes 31 and 31' are prevented from being obstructed or obstructed by the adjacent interference.

The circuit board 40 can be easily mounted by fixing the circuit board 40 to the back support fixing bars 20 and 20 '. The circuit board 40 is mounted on one side of the circuit board 40, And a plurality of wire connection ports 42 are formed on the other side of the circuit board 40 toward the outside of the modular case. The extension connector 41 is connected to an individual amplifier module 60) 60 'are connected and connected to each other and the wire connection port 42 can be connected to an output means such as a power supply and a speaker.

Particularly, the circuit board 40 is not exposed as it is, but is protected by a separate thick plate 50. The thick plate 50 is fixedly coupled to the side plates 10 and 10 'and the circuit board 40 Thereby protecting the rear side of the digital amplifier and realizing a more rigid modular case structure.

That is, the thick plate 50 is formed by bending a metal plate. The thick plate 50 is provided with through holes 51 and 51 'through which the wire connection port 42 of the circuit board 40 is inserted. And engagement holes 52 at positions corresponding to the bolt holes 11 formed in the fastening pins 12 and 12 'of the side plates 10 and 10' are formed at both sides of the thick plate 50 The fastening bolt is inserted through the coupling hole 52 in a state where the wire connection port 42 of the circuit board 40 is inserted and exposed through the through holes 51 and 51 ' The bolt holes 11 formed in the fastening pins 12 and 12 'of the fastening plate 12 are firmly engaged and fixed.

At this time, a plurality of spacing pins 43 and 43 'are inserted between the circuit board 40 and the thick plate 50 and the spacers 43 and 43' The fixing plate 50 is firmly fixed to the side plates 10 and 10 'and is fixed at a predetermined distance from the circuit board 40 The circuit board 40 can be stably protected even if a shock or a physical impact is generated in a process of performing a wire operation or a variety of connection operations on the rear side of the digital amplifier.

Accordingly, the side plates 10 and 10 'and the supporting and fixing bars 20 and 20' will serve as a rigid frame, and the assembly and circuitry of the upper and lower plates 30 and 30 ' The board 40 and the thick plate 50 are fixedly coupled to each other so that an amplifier modular case having a durable and stable durability can be completed.

As shown in FIG. 8, the assembly process of the digital amplifier according to the present invention will be described. First, the upper and lower portions of the side plate 10 and 10 ' The fastening bolts are inserted through the outer surfaces of the side plates 10 and 10 'while the fastening bolts 20 and 20' are arranged so that the fastening bolts are formed on the support fastening bars 20 and 20 ' And is screwed into the fastening hole 23, the skeleton of the modular case is completed.

Next, as shown in Fig. 9, the circuit board 40 is fixed by using the rear supporting bar 20 ', and the space retaining pins 43 and 43' are assembled on the outer surface of the circuit board 40 The thick plate 50 is bolted to the fastening pins 12 and 12 'formed on the side plates 10 and 10' as shown in FIG. 10, and at the same time, the spacing pins 43 and 43 ' So that the thick plate 50 can be securely assembled and fixed.

In this state, the mounting flanges 34 and 34 'of the upper and lower plates 30 and 30' are brought into close contact with the supporting and fixing bars 20 and 20 'as shown in FIGS. 11 and 12, A rigid and excellent durability modular case for a digital amplifier can be easily made by tightly bolting the fastening flanges 33 and 33 'of the side plates 30 and 30' to the side plates 10 and 10 ' It is.

Since the upper and lower plates 30 and 30 'are formed in the same shape and shape, the modular case can be used without discrimination between the upper and lower plates 30 and 30', so that damage to any one of the plates 30 and 30 ' In case of breakage, the modular case can be turned upside down (the individual amplifier module is usually used due to its own weight, so that the upper and lower plates on the lower side are damaged) .

In this state, as shown in FIG. 13, the single or multiple individual amplifier modules 60 and 60 'are mounted through the front portion of the modular case, so that the maximum output by the amplifier having the minimum output form or expansion In the present invention, up to six individual amplifier modules 60 and 60 'may be connected in parallel to each other. In the case of a single individual amplifier module 60 (60') having an output of 120 W, So that a high output of 720 W at maximum can be realized.

The individual amplifier modules 60 and 60 'are connected to an amplifier unit 62 formed of a transformer and an amplifier circuit in a module body 61 formed by bending a metal plate. Is configured to have the same width as the guide protrusions 32 and 32 'formed on the upper and lower plates 30 and 30', and guided through the guide protrusions 32 and 32 ' So that the module body 61 can be slidably inserted into the modular case.

A front panel 63 is mounted in front of the module main body 61 so that a power switch and a volume formed on the front panel 63 can be operated in an assembled state. And the front panel 63 is inserted in the process of sliding insertion of the individual amplifier modules 60 and 60 'by connecting the connection connector 64 to the rear of the module body 61, The connecting connector 64 is fully engaged with the extension connector 41 of the circuit board 40 as soon as it contacts the front supporting bars 20 and 20 '

In this case, the front panel 63 may be provided with an assembly bolt that can be fastened to the supporting and fixing bars 20 and 20 'in a non-separable manner. The individual amplifier modules 60 and 60' A handle member or the like can be combined to easily pull out and separate.

The individual amplifier modules 60 and 60 'are slidably inserted into the modular case so that the individual amplifier modules 60 and 60' by the circuit board 40 are simultaneously connected to the connection connector 64 and the expansion connector 41, '), And the output increase can be easily adjusted by adding or subtracting the number of the individual amplifier modules 60 (60').

In the case where only a certain number of individual amplifier modules 60 and 60 'are to be used in a state where a maximum of six individual amplifier modules 60 and 60' can be installed as shown in the drawing, The dummy panels 70 and 70 'having the same size and design as those of the front panel 63 of the individual amplifier modules 60 and 60' are mounted as shown in FIG. 14, It will be able to be beautiful.

Therefore, the digital amplifier of the present invention has a relatively simple structure and a good durability in the modular case structure, so that the individual amplifier modules 60 and 60 'can be mounted or separated while the individual amplifier modules 60 and 60' And the connection state of the individual amplifier modules 60 and 60 'is poor even in the process of rack mounting the digital amplifier itself in the cabinet, since the shape of the rectangular parallelepiped is stably maintained, The use of the individual amplifier modules 60 and 60 'can be extended freely, and the number of the individual amplifier modules 60 and 60' can be freely increased. The output can be controlled by adding and subtracting, so you can quickly and effectively build and use the best digital amplifier.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the present invention as defined by the appended claims. Examples should be understood.

10,10 ': Side plate 11: Bolt hole
12, 12 ': fastening pin
20, 20 ': support and fixing bar 21: opening
22: insertion groove 23: fastening hole
24, 24 ': screw hole 25:
30 and 30 ': upper and lower plates 31 and 31'
32, 32 ': guide projections 33, 33': fastening flanges
34,34 ': Mounting flange
40: circuit board 41: extension connector
42: a wire connection port 43, 43 '
50: Plate 51, 51 ': Through hole
52: coupling ball
60, 60 ': Individual amplifier module 61: Module body
62: Amplifier unit 63: Front panel
64: connection connector
70,70 ': Dummy panel

Claims (8)

The supporting and fixing bars 20 and 20 'are formed at the front and rear sides between the side plates 10 and 10' spaced apart from each other, 31 'and the guide projections 32 and 32' of the inwardly bent portions are formed on the rear supporting bar 20 ', and the rear supporting bar 20' (51) and (51 ') in which the wire connection port (42) is inserted are formed at the rear side of the circuit board. The circuit board (40) The individual amplifier modules 60 and 60 'are inserted into the respective front and rear support bars 20 and the individual amplifier modules 60 and 60' Is connected to the extension connector (41) of the circuit board (40) while being fixed to the front support fixing bar (20) For example,
A fastening pin 12 or 12 'formed with a bolt hole 11 is formed to protrude inward from the rear side of the side plate 10 or 10' And the bolt hole (11) is bolted to the bolt hole (11) through the coupling hole (52) of the thick plate (50) through the hole (52) Expandable digital amplifier with case.
The method according to claim 1,
An opening 21 is formed on one side of the supporting and fixing bars 20 and 20 'along the longitudinal direction and an insertion groove 22 is formed on the inside and the bottom of the opening 21, And the side plates 10 and 10 'are bolted to each other by the fastening holes 23 and the individual amplifier modules 60 And a fastening fixture (25) repeatedly formed along the longitudinal direction is slidably inserted into a screw hole (24) (24 ') for joining the circuit board (40) Digital amplifier.
The method according to claim 1,
Fastening flanges 33 and 33 'for fastening and fixing to the side plates 10 and 10' are formed at both ends of the upper and lower plates 30 and 30 ' And a mounting flange (34) (34 ') for mounting on the outer surface of the bars (20) and (20') is bent.
The method according to claim 1,
The individual amplifier modules 60 and 60 'are provided with the module body 61 having a width corresponding to the interval between the guide protrusions 32 and 32' formed on the upper and lower plates 30 and 30 ' An amplifier unit 62 is fixedly mounted inside the module body 61 and a front panel 63 fastened to the support fixing bars 20 and 20 'is mounted at one end of the module body 61 And a connection connector (64) for coupling with the extension connector (41) of the circuit board (40) is protruded from the other end of the module main body (61).
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