CN218388216U - Universal case structure applied to audio equipment - Google Patents

Abstract

The utility model relates to an use general type machine case structure on audio equipment, its characteristics lie in including general casing, the front panel, the lamina tecti, two preceding spacers, two back spacers, wherein the installation cavity has been seted up on the general casing, the lamina tecti clamps on the last accent of installation cavity, preceding integrated circuit board dress is on the preceding accent of installation cavity, two preceding spacers can set up on the outer wall about general casing front end and/or the front panel about with dismantling and serve, two back spacers can set up on the outer wall about general casing rear end with dismantling. The utility model discloses can provide the quick-witted case of universalization for audio equipment, this can the large-scale mould that significantly reduces make quantity, and also need not make large-scale mould when upgrading the transformation, it can constitute modularization, standardization and universalization structure to can the manufacturing cost of greatly reduced enterprise reform transform the cost with upgrading, it has simple structure, easily makes, be convenient for pack, packaging cost low, the reliability is high, the suitability advantage such as strong.

Description

Universal case structure applied to audio equipment

Technical Field

The utility model relates to an audio equipment field, especially a machine case structure.

Background

Currently, most audio devices (e.g., power amplifier, microphone host, song-ordering host, video disc player, central control host, sequential power supply, front stage effect, etc.) protect electrical components through a metal chassis.

Most of the existing chassis are composed of a bottom case and a face cover, wherein the bottom case is a box body with an opening at the top, and the face cover is arranged at the top of the bottom case. Because most of the existing bottom cases are formed by stamping and folding metal plates, a die is used in the production process of the bottom cases. Since the bottom box is generally large, a large metal plate is required, which requires a large die to stamp the metal plate.

When an enterprise needs to manufacture various audio devices, a plurality of large molds need to be manufactured, which easily causes the production cost of the enterprise to be very high. When the structure of the bottom box is changed, a large-scale mold needs to be redesigned and produced, which easily causes the upgrading and modification cost of the audio equipment to be very high.

Simultaneously, current audio equipment need be installed on the power amplifier cabinet mostly, so can make integrative location lug respectively on the under casing of most audio equipment and face lid, this whole volume that easily leads to audio equipment is great to just need big packing box to pack, this not only easily leads to packaging cost height, environmental protection not enough.

Therefore, it is necessary to redesign the cabinet structure of the audio device.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve the above-mentioned problem and not enough, a general type machine case structure of using on audio equipment is provided, this general type machine case structure can provide the quick-witted case of universalization for audio equipment, this manufacturing quantity of the large-scale mould that can significantly reduce, and also need not make large-scale mould when upgrading and transforming, it can constitute the modularization, standardization and universalization structure, thereby can the manufacturing cost and the upgrading transformation cost of greatly reduced enterprise, it has simple structure, easily manufacturing, be convenient for pack, low in packaging cost, high reliability, advantages such as suitability is strong.

The technical scheme of the utility model is realized like this:

the utility model provides an use general type machine case structure on audio equipment, its characterized in that includes general casing, front panel, lamina tecti, two preceding spacers, two back spacers, wherein has seted up the installation cavity on the top surface of general casing to make the front end of installation cavity run through to the antetheca of general casing on, the lamina tecti clamps on the last accent of installation cavity, preceding integrated circuit board dress is on the preceding accent of installation cavity, and two preceding spacers can set up on the outer wall about the general casing front end and/or on the end about the front panel with dismantling, and two back spacers can set up on the outer wall about the general casing rear end with dismantling.

Preferably, the universal casing is of a one-piece casing structure.

Preferably, the universal casing comprises a bottom plate, a left side plate, a right side plate and a rear side plate which are integrated, the lower end of the left side plate is connected with the left end of the bottom plate, the lower end of the right side plate is connected with the right end of the bottom plate, the lower end of the rear side plate is connected with the rear end of the bottom plate, the left end and the right end of the rear side plate are respectively connected with the rear end of the left side plate and the rear end of the right side plate, the bottom plate, the left side plate, the right side plate and the rear side plate jointly enclose to form an installation cavity, the top cover plate is clamped at the upper ends of the left side plate, the right side plate and the rear side plate, the front plate is clamped at the front end of the bottom plate, the front end of the left side plate, the front end of the right side plate and the front end of the top cover plate, and the two rear positioning pieces are respectively arranged at the rear end of the left side plate and the rear end of the right side plate.

Preferably, the upper end of the left side plate is bent rightwards to form a left limiting piece, the upper end of the right side plate is bent leftwards to form a right limiting piece, the left end and the right end of the top cover plate are bent downwards to form a first limiting piece and a second limiting piece respectively, the rear end of the top cover plate is provided with at least one rear limiting piece, the first limiting piece is pressed against the left surface of the left limiting piece, the second limiting piece is pressed against the right surface of the right limiting piece, and the rear limiting piece is pressed against the rear surface of the rear side plate.

Preferably, the upper front end of the left side plate is provided with a left limit convex block, the front end of the first limit piece is arranged on the rear surface of the left limit convex block in a propping manner, the upper front end of the right side plate is provided with a right limit convex block, and the front end of the second limit piece is arranged on the rear surface of the right limit convex block in a propping manner.

Preferably, the front end of the left side plate is bent rightwards to form a third limiting piece, the front end of the right side plate is bent leftwards to form a fourth limiting piece, the front end of the bottom plate is bent upwards to form a fifth limiting piece, the front end of the top cover plate is bent downwards to form a sixth limiting piece, the left end and the right end of the front panel are bent backwards to form a seventh limiting piece and an eighth limiting piece respectively, the upper end and the lower end of the front panel are bent backwards to form a ninth limiting piece and a tenth limiting piece respectively, the seventh limiting piece is pressed on the left surface of the third limiting piece, the eighth limiting piece is pressed on the right surface of the fourth limiting piece, the ninth limiting piece is pressed on the top surface of the sixth limiting piece, and the tenth limiting piece is pressed on the bottom surface of the fifth limiting piece.

Preferably, the rear end of the ninth limiting piece is provided with at least one inserting piece, the sixth limiting piece is provided with a yielding notch which is equal to the inserting pieces in number and corresponds to the inserting pieces in position, and the inserting pieces are inserted onto the bottom surface of the top cover plate after penetrating through the yielding notch.

Preferably, the front positioning pieces comprise a transverse piece and a longitudinal piece which are integrated, the front ends of the longitudinal pieces are connected with the end parts of the transverse piece, and the longitudinal pieces of the two front positioning pieces are respectively arranged on the seventh limiting piece and the eighth limiting piece.

Preferably, a plurality of through abdicating holes are formed in the rear side plate.

Preferably, the front positioning piece is provided with a front waist-shaped hole, and the rear positioning piece is provided with a rear waist-shaped hole.

The utility model has the advantages that: in the general case structure, a combination structure of the general case, the front panel and the top cover plate is adopted. The universal casing can be used for installing electrical components of a plurality of audio equipment, and the front panel can be used for installing operation buttons, an operation panel, a display and the like of the audio equipment. Like this enterprise in the production process, can make most structure on various audio equipment machine casees have very good commonality, only need select for use small, the front panel of structure difference for use, just can take out the quick-witted case that is applicable to different audio equipment fast, this general type machine case structure's commonality is very good. After the enterprise adopts this general type chassis structure, the enterprise only need make a large-scale mould and make general casing, and the manufacturing front panel only need little mould can. Therefore, enterprises do not need to produce a plurality of large molds, and the production cost of the enterprises is reduced. In the upgrading and transforming process, only a small mould for processing the front panel needs to be manufactured again, and a large mould does not need to be produced, so that the upgrading and transforming cost of the audio equipment is reduced. The universal type case structure can form a modularized, standardized and generalized structure, so that the production cost can be reduced, and the upgrading and transformation cost can be reduced.

Through the setting of lamina tecti, can be convenient for make the installation cavity open big opening to can conveniently overhaul the electrical components of installation cavity, this convenience that helps improving the maintenance.

By making both the front and rear splines of a sheet-like structure, this allows for good control of the space occupancy. Through making before two spacer, two back spacer all adopt can dismantle the mounting means, can be when packing, all dismantle the packing with before two spacer, two back spacers, this just need not big carton and packs, and this can not only reduce the cost of packing, can also play very good environmental protection. And can be convenient for match different preceding spacer, back spacer like this to can be convenient for assemble more various general type machine case structure, and then help improving this general type machine case structure's suitability.

The universal case structure has the advantages of simple structure, easiness in manufacturing, convenience in packaging, low packaging cost, high reliability, strong applicability and the like.

Drawings

Fig. 1 is one of the schematic three-dimensional structures of the universal case structure of the present invention.

Fig. 2 is a second schematic perspective view of the universal case structure of the present invention.

Fig. 3 is one of the schematic diagrams of the split structure of the universal case structure of the present invention.

Fig. 4 is a second schematic view of the split structure of the universal chassis structure of the present invention.

Fig. 5 is a schematic perspective view of the universal housing of the present invention.

Fig. 6 is a schematic perspective view of the front panel of the present invention.

Fig. 7 is a schematic perspective view of the middle top cover plate of the present invention.

Fig. 8 is a schematic view of a three-dimensional structure of the middle-front positioning plate of the present invention.

Fig. 9 is a schematic view of a three-dimensional structure of the middle and rear positioning plates of the present invention.

Detailed Description

As shown in fig. 1 to 5, a general type chassis structure who uses on audio equipment, including general casing 1, front panel 2, lamina tecti 3, two preceding spacers 4, two back spacers 5, wherein installation cavity 10 has been seted up on the top surface of general casing 1 to make the front end of installation cavity 10 run through to on the antetheca of general casing 1, lamina tecti 3 clamps on the last accent of installation cavity 10, front panel 2 clamps on the preceding accent of installation cavity 10, two preceding spacers 4 can set up on the outer wall about general casing 1 front end and/or on the end about front panel 2 with dismantling, two back spacers 5 can set up on the outer wall about general casing 1 rear end with dismantling.

In the general-purpose casing structure, a combination structure of the general-purpose casing 1, the front panel 2 and the top cover plate 3 is adopted. The universal casing 1 can be used for installing electrical components of a plurality of audio equipment, and the front panel 2 can be used for installing operation buttons, an operation panel, a display and the like of the audio equipment. Therefore, in the production process of enterprises, most of structures on various audio equipment cases can have very good universality, the cases suitable for different audio equipment can be quickly collocated only by selecting the front panels 2 with small volumes and different structures, and the universality of the general case structure is very good. After the enterprise adopts the universal case structure, the enterprise only needs to manufacture a large-scale die to manufacture the universal case 1, and only needs a small die to manufacture the front panel 2. Therefore, enterprises do not need to produce a plurality of large molds, and the production cost of the enterprises is reduced. In the upgrading and transforming process, only a small mould for processing the front panel 2 needs to be manufactured again, and a large mould does not need to be produced, so that the upgrading and transforming cost of the audio equipment is reduced. The universal type case structure can form a modularized, standardized and generalized structure, so that the production cost can be reduced, and the upgrading and transformation cost can be reduced.

Through the setting of lamina tecti 3, can be convenient for make installation cavity 10 open big opening to can conveniently overhaul the electrical components of installation cavity 10, this helps improving the convenience of maintaining.

By making both the front and rear splines 4, 5 adopt a lamellar structure, this allows for a good control of the space occupancy. Through making two preceding spacers 4, two back spacers 5 all adopt the mounting means with dismantling, can be when the packing, all dismantle the packing with two preceding spacers 4, two back spacers 5, this just need not big carton and packs, and this cost that can not only reduce the packing can also play very good environmental protection. And can be convenient for match different preceding spacer 4, back spacer 5 like this to can be convenient for assemble more various general type machine case structures, and then help improving this general type machine case structure's suitability.

The universal case structure has the advantages of simple structure, easiness in manufacturing, convenience in packaging, low packaging cost, high reliability, strong applicability and the like.

The universal casing structure can be applied to audio equipment such as power amplifiers, microphone hosts, song ordering hosts, video disc players, central control hosts, sequential power supplies, front stage effects and the like.

When an enterprise produces, the universal casing 1 can be produced, and then other components are specially processed according to the requirements of customers, so that the requirements of the customers can be quickly met.

The universal casing 1 can be matched with 40 kinds of front panels 2, the types of the front panels 2 can be further increased according to different use requirements, and the types of the two front positioning pieces 4 and the two rear positioning pieces 5 can reach hundreds. This general type quick-witted case structure can be convenient for arrange many kinds of general type quick-witted case structure to can produce many kinds of general type quick-witted case structure through little cost, this general type quick-witted case structure's suitability is very strong.

The universal casing 1, the front panel 2, the top cover plate 3, the two front positioning pieces 4 and the two rear positioning pieces 5 are all made of metal structures, such as aluminum, stainless steel and the like. This enables the universal chassis structure to have high structural strength and durability.

As shown in fig. 5, the universal casing 1 is a one-piece casing structure. This enables the universal case 1 to have high structural strength and durability, thereby contributing to further improvement in reliability and life of the universal case structure.

As shown in fig. 1 to 5, the universal casing 1 includes a bottom plate 11, a left side plate 12, a right side plate 13, and a rear side plate 14, wherein a lower end of the left side plate 12 is connected to a left end of the bottom plate 11, a lower end of the right side plate 13 is connected to a right end of the bottom plate 11, a lower end of the rear side plate 14 is connected to a rear end of the bottom plate 11, and left and right ends of the rear side plate 14 are respectively connected to a rear end of the left side plate 12 and a rear end of the right side plate 13, the bottom plate 11, the left side plate 12, the right side plate 13, and the rear side plate 14 together enclose and form a mounting cavity 10, the top cover plate 3 is mounted on upper ends of the left side plate 12, the right side plate 13, and the rear side plate 14, the front panel 2 is mounted on a front end of the bottom plate 11, a front end of the left side plate 12, a front end of the right side plate 13, and a front end of the top cover plate 3, and two rear positioning pieces 5 are respectively disposed on a rear end of the left side plate 12 and a rear end of the right side plate 13. The structure of the universal casing 1 is very simple and reliable, which not only facilitates the manufacture of the universal casing 1, but also enables the universal casing 1 to have a very good protection effect, which helps to further improve the reliability of the universal casing structure.

As shown in fig. 5, the left side plate 12, the right side plate 13 and the rear side plate 14 are formed by bending a plate material upward, and the left and right ends of the rear side plate 14 are fixed to the rear end of the left side plate 12 and the rear end of the right side plate 13, respectively, by welding, so that the highly reliable universal casing 1 can be constructed.

The two rear positioning pieces 5 are fixed to the rear ends of the left side plate 12 and the right side plate 13 by screws (not shown). Therefore, the purpose of stably fixing the rear positioning plate 5 can be achieved, and the mounting and positioning of the rear positioning plate 5 can be guaranteed to be stable and reliable.

As shown in fig. 1 to 5 and 7, the upper end of the left side plate 12 is bent rightward to form a left limiting piece 121, the upper end of the right side plate 13 is bent leftward to form a right limiting piece 131, the left end and the right end of the top cover plate 3 are respectively bent downward to form a first limiting piece 31 and a second limiting piece 32, the rear end of the top cover plate 3 is provided with at least one rear limiting piece 33, the first limiting piece 31 presses against the left surface of the left limiting piece 121, the second limiting piece 32 presses against the right surface of the right limiting piece 131, and the rear limiting piece 33 presses against the rear surface of the rear side plate 14. Can be convenient for like this stably, accurately inject lamina tecti 3 to help improving lamina tecti 3 installation positioning's accuracy and stability, and then help further improving the reliability of this general type chassis structure. And the left and right surfaces of the universal case structure can be flattened conveniently, the appearance harmony of the universal case structure can be improved, the attractiveness can be improved, the scratch is reduced, and the applicability of the universal case structure is further improved.

The first limiting sheet 31 is fixed on the left limiting sheet 121 through a screw (not shown in the figure), the second limiting sheet 32 is fixed on the right limiting sheet 131 through a screw (not shown in the figure), and the rear limiting sheet 33 is fixed on the rear side plate 14 through a screw (not shown in the figure). Therefore, the purpose of stably installing the top cover plate 3 can be achieved, and the top cover plate 3 is guaranteed to be installed stably and reliably.

As shown in fig. 1 to 3 and 5, the left side plate 12 is provided with a left limit protruding stop 122 at the upper front end thereof, the front end of the first limit piece 31 abuts against the rear surface of the left limit protruding stop 122, the right side plate 13 is provided with a right limit protruding stop 132 at the upper front end thereof, and the front end of the second limit piece 32 abuts against the rear surface of the right limit protruding stop 132. This can play more accurate, reliable limiting displacement to lamina tecti 3 to help further improving lamina tecti 3 installation positioning's accuracy and stability, and then help further improving the reliability of this general type computer case structure.

As shown in fig. 1 to 7, a third limiting piece 123 is formed by bending the front end of the left side plate 12 to the right, a fourth limiting piece 133 is formed by bending the front end of the right side plate 13 to the left, a fifth limiting piece 111 is formed by bending the front end of the bottom plate 11 to the upward, a sixth limiting piece 34 is formed by bending the front end of the top cover plate 3 to the downward, a seventh limiting piece 21 and an eighth limiting piece 22 are respectively formed by bending the left end and the right end of the front panel 2 to the backward, a ninth limiting piece 23 and a tenth limiting piece 24 are respectively formed by bending the upper end and the lower end of the front panel 2 to the backward, the seventh limiting piece 21 is pressed against the left surface of the third limiting piece 123, the eighth limiting piece 22 is pressed against the right surface of the fourth limiting piece 133, the ninth limiting piece 23 is pressed against the top surface of the sixth limiting piece 34, and the tenth limiting piece 24 is pressed against the bottom surface of the fifth limiting piece 111. Therefore, the front panel 2 can be conveniently, stably and accurately limited, the accuracy and the stability of the installation and the positioning of the front panel 2 are improved, and the reliability of the universal case structure is further improved. And the left surface, the right surface, the upper surface and the lower surface of the universal case structure can be flattened conveniently, the harmony of the appearance of the universal case structure can be improved, the attractiveness can be improved, the scratch is reduced, and the applicability of the universal case structure is further improved.

The seventh position-limiting piece 21 is fixed to the third position-limiting piece 123 by a screw (not shown), the eighth position-limiting piece 22 is fixed to the fourth position-limiting piece 133 by a screw (not shown), and the tenth position-limiting piece 24 is fixed to the fifth position-limiting piece 111 by a screw (not shown). Thus, the purpose of stably installing the front panel 2 can be achieved, and the front panel 2 is guaranteed to be installed stably and reliably.

As shown in fig. 1, 3, 6 and 7, at least one insertion piece 231 is disposed at the rear end of the ninth limiting piece 23, the sixth limiting piece 34 is provided with abdication notches 341 with the same number and corresponding positions as the insertion pieces 231, and the insertion pieces 231 are inserted onto the bottom surface of the top cover plate 3 after passing through the abdication notches 341. Enable lamina tecti 3 and front panel 2 like this and produce mutual limiting displacement to help further improving lamina tecti 3 and front panel 2 installation positioning's stability and accuracy, and then help further improving the reliability of this general type computer case structure.

As shown in fig. 1 to 4 and 8, the front positioning piece 4 includes a transverse piece 41 and a longitudinal piece 42, the front end of the longitudinal piece 42 is connected to the end of the transverse piece 41, and the longitudinal pieces 42 of the two front positioning pieces 4 are respectively disposed on the seventh limiting piece 21 and the eighth limiting piece 22. The structure of the front positioning piece 4 is very simple and reliable, so that the front positioning piece 4 not only can be conveniently manufactured, but also can be conveniently used for ensuring that the front positioning piece 4 has a very good positioning effect, and the reliability of the general type case structure is further improved.

The longitudinal piece 42 of the left front positioning piece 4 is fixed on the seventh limiting piece 21 by a screw (not shown in the figure), and the screw for fixing the left front positioning piece 4 is simultaneously screwed on the third limiting piece 123. The longitudinal piece 42 of the right front positioning piece 4 is fixed on the eighth limiting piece 22 by a screw (not shown in the figure), and the screw for fixing the right front positioning piece 4 is simultaneously screwed on the fourth limiting piece 133. Thus, the two front positioning pieces 4 can be stably and reliably installed, and a reliable universal case structure can be formed.

As shown in fig. 5, the rear side plate 14 is provided with a plurality of through-going receding holes 141. By providing the back side plate 14 with the relief hole 141, it is possible to easily arrange the electric connector and the power supply module on the back side of the universal casing structure, and thus it is possible to easily construct a reliable universal casing structure.

As shown in fig. 6, the front panel 2 is provided with at least one mounting hole 25. The mounting holes 25 can be used for arranging a display panel, a control key, an indicator light and the like, so that the universal case structure can well meet the requirements of actual use.

In the actual manufacturing process, the electrical components on the audio device can be set according to actual needs, for example: 1. welding the potentiometer and the switch on a control circuit board without a power line, a short-circuit device and a display board; 2. the potentiometer is separated from the switch independently, the flat cable is connected, and the potentiometer is provided with no power line or short-circuit device and a display panel.

One of them hole 141 of stepping down can constitute the power supply hole, and the power supply unit mount promptly, in the position of power supply hole, can change the mounting means of power cord, insurance through changing different power supply units to just can be convenient for constitute different electric energy input structures, this user demand that just can be convenient for satisfy more kinds.

In the actual assembly process, the power input structure can adopt the following two types: first, with a power socket, the power cord can be disconnected, with a short-circuiting device. And the second mode is that the power line is installed in a wire clamping mode, the power line is connected with a host, and the short-circuit device is not used and has a safety function. This can meet different use requirements.

As shown in fig. 8 and 9, the front positioning sheet 4 is provided with a front waist-shaped hole 43, and the rear positioning sheet 5 is provided with a rear waist-shaped hole 51. Can conveniently fix preceding spacer 4, back spacer 5 on the power amplifier cabinet through the screw like this, and can suitably adjust the position to just can satisfy the fixed demand of installation of general type machine case structure better, and then help further improving the suitability of this general type machine case structure.

As shown in fig. 1 to 4, 8 and 9, the front waist-shaped holes 43 are formed in the transverse plate 41, the rear waist-shaped holes 51 are formed in the rear end of the rear positioning plate 5, and the rear end of the rear positioning plate 5 is disposed obliquely behind the rear side plate 14, so that the fixing requirements of the general chassis structure can be well satisfied.

Claims (10)

1. The utility model provides an use general type chassis structure on audio equipment which characterized in that: the multifunctional combined type automobile front panel is characterized by comprising a universal casing (1), a front panel (2), a top cover plate (3), two front positioning pieces (4) and two rear positioning pieces (5), wherein a mounting cavity (10) is formed in the top surface of the universal casing (1), the front end of the mounting cavity (10) penetrates through the front wall of the universal casing (1), the top cover plate (3) is clamped on an upper cavity opening of the mounting cavity (10), the front panel (2) is clamped on the front cavity opening of the mounting cavity (10), the two front positioning pieces (4) can be detachably arranged on the left and right outer walls of the front end of the universal casing (1) and/or the left and right ends of the front panel (2), and the two rear positioning pieces (5) can be detachably arranged on the left and right outer walls of the rear end of the universal casing (1).

2. The universal chassis structure for audio equipment according to claim 1, wherein: the general casing (1) is of an integrated casing structure.

3. The structure of a general-purpose cabinet for use in an audio apparatus according to claim 1 or 2, wherein: the universal machine shell (1) comprises an integrated bottom plate (11), a left side plate (12), a right side plate (13) and a rear side plate (14), the lower end of the left side plate (12) is connected with the left end of the bottom plate (11), the lower end of the right side plate (13) is connected with the right end of the bottom plate (11), the lower end of the rear side plate (14) is connected with the rear end of the bottom plate (11), the left end and the right end of the rear side plate (14) are respectively connected with the rear end of the left side plate (12) and the rear end of the right side plate (13), the bottom plate (11), the left side plate (12), the right side plate (13) and the rear side plate (14) jointly enclose to form an installation cavity (10), the top cover plate (3) is clamped on the upper ends of the left side plate (12), the right side plate (13) and the rear side plate (14), the front panel (2) is clamped on the front end of the bottom plate (11), the front end of the left side plate (12), the front end of the right side plate (13) and the front end of the top cover plate (3), and two rear side plates (5) are respectively arranged on the rear end of the rear side plate (12).

4. The universal chassis structure for use in audio equipment according to claim 3, wherein: the upper end of the left side plate (12) is bent rightwards to form a left limiting piece (121), the upper end of the right side plate (13) is bent leftwards to form a right limiting piece (131), the left end and the right end of the top cover plate (3) are bent downwards to form a first limiting piece (31) and a second limiting piece (32), the rear end of the top cover plate (3) is provided with at least one rear limiting piece (33), the first limiting piece (31) is pressed on the left surface of the left limiting piece (121), the second limiting piece (32) is pressed on the right surface of the right limiting piece (131), and the rear limiting piece (33) is pressed on the rear surface of the rear side plate (14).

5. The universal chassis structure for use in audio equipment according to claim 4, wherein: the last front end of left side board (12) is provided with left spacing protruding fender (122), the front end top of first spacing piece (31) is arranged in on the rear surface of left spacing protruding fender (122), the last front end of right side board (13) is provided with right spacing protruding fender (132), the front end top of second spacing piece (32) is arranged in on the rear surface of right spacing protruding fender (132).

6. The universal chassis structure for use in audio equipment according to claim 3, wherein: the front end of the left side plate (12) is bent rightwards to form a third limiting piece (123), the front end of the right side plate (13) is bent leftwards to form a fourth limiting piece (133), the front end of the bottom plate (11) is bent upwards to form a fifth limiting piece (111), the front end of the top cover plate (3) is bent downwards to form a sixth limiting piece (34), the left end and the right end of the front panel (2) are bent backwards to form a seventh limiting piece (21) and an eighth limiting piece (22), the upper end and the lower end of the front panel (2) are bent backwards to form a ninth limiting piece (23) and a tenth limiting piece (24), the seventh limiting piece (21) is pressed against the left surface of the third limiting piece (123), the eighth limiting piece (22) is pressed against the right surface of the fourth limiting piece (133), the ninth limiting piece (23) is pressed against the top surface of the sixth limiting piece (34), and the tenth limiting piece (24) is pressed against the bottom surface of the fifth limiting piece (111).

7. The universal chassis structure for use in audio equipment according to claim 6, wherein: the rear end of the ninth limiting piece (23) is provided with at least one inserting piece (231), a yielding notch (341) which is equal to the inserting piece (231) in number and corresponds to the position is formed in the sixth limiting piece (34), and the inserting piece (231) penetrates through the yielding notch (341) and then is inserted into the bottom surface of the top cover plate (3).

8. The universal chassis structure for use in audio equipment according to claim 6, wherein: the front positioning pieces (4) comprise a transverse piece (41) and a longitudinal piece (42) which are integrated, the front ends of the longitudinal pieces (42) are connected with the end parts of the transverse piece (41), and the longitudinal pieces (42) of the two front positioning pieces (4) are respectively arranged on the seventh limiting piece (21) and the eighth limiting piece (22).

9. The universal chassis structure for use in audio equipment according to claim 3, wherein: the rear side plate (14) is provided with a plurality of through yielding holes (141).

10. The universal chassis structure for audio equipment according to claim 1, wherein: the front positioning piece (4) is provided with a front waist-shaped hole (43), and the rear positioning piece (5) is provided with a rear waist-shaped hole (51).

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