CN109982196B

CN109982196B - Folding box and sound box

Info

Publication number: CN109982196B
Application number: CN201910315094.4A
Authority: CN
Inventors: 蓝秋玲
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-18
Filing date: 2019-04-18
Publication date: 2024-03-22
Anticipated expiration: 2039-04-18
Also published as: CN109982196A

Abstract

The invention belongs to the technical field of sound boxes, and particularly relates to a folding box body and a sound box, which comprise a corrugated pipe which is hollow in the interior and can be compressed or stretched along the axial direction, wherein the corrugated pipe comprises a plurality of first side walls and a plurality of second side walls; each first side wall and each second side wall are alternately connected along the axial direction and form wave crests and wave troughs; the angle formed by the adjacent first side wall and second side wall at the wave crest is a vertex angle alpha, and the angle formed by the adjacent first side wall and second side wall at the wave trough is a base angle beta; when the corrugated pipe is in a fully unfolded state, the range of the top angle alpha and the bottom angle beta is 15-75 degrees and is unequal; when the bellows is in a fully folded state, both the top angle α and the bottom angle β are 0 °. The invention can control the folding box body to be unfolded or folded completely according to the requirement, and can control the length of stretching or compressing to be in a proper size range, thereby realizing the adjustment and change of the sound quality of the sound box using the folding box body.

Description

Folding box and sound box

Technical Field

The invention belongs to the technical field of sound boxes, and particularly relates to a folding box body and a sound box.

Background

Most of the loudspeaker box products on the market at present are made of hard materials, and the box body of the loudspeaker box products is hard and firm, and is heavier, larger and longer, and the loudspeaker box has the defects that the box body occupies space, is not beneficial to transportation, storage and outgoing carrying, has a single structure, and is heavy and inflexible in shape.

In order to solve the above-mentioned problem that the audio amplifier that exists on the market at present, the industry provides a can folding audio amplifier, realizes compressing and tensile to the audio amplifier through increasing design elastic component, so can make the volume of audio amplifier realize changing to improve the convenience that the audio amplifier carried. However, due to the limitation of the structural design of the elastic component, the existing foldable sound box has the phenomenon of incomplete compression and stretching, namely, the sound box cannot be effectively ensured to be in a completely unfolded or completely folded state.

In addition, the present urban life is more urgent and more busy than any time, and people are more urgent to demand more complex and intelligent products, and the complex aesthetic requirements of people are more required to be met while the functional requirements of people on basic products are met, so that the people can enjoy more delicate psychology and comfort. However, although the current sound box can realize stretching and compression, the stretching or compression length of the sound box cannot be controlled, so that the size of the sound box volume cannot be changed at will to realize diversified music styles. Obviously, the traditional loudspeaker box product can not completely meet the requirements of people on good life.

Disclosure of Invention

The invention aims to provide a folding box body and a sound box, and aims to solve the technical problems that the folding sound box in the prior art cannot ensure that the sound box can be in a fully unfolded or fully folded state in the compression and stretching processes, and the sound box cannot realize tone quality adjustment and change by changing the size of the sound box.

In order to achieve the above object, an embodiment of the present invention provides a folding box, including a bellows that is hollow inside and can be compressed or stretched in an axial direction, the bellows including a plurality of first side walls and a plurality of second side walls;

each first side wall and each second side wall are alternately connected along the axial direction of the corrugated pipe, the outer ends of the first side walls and the outer ends of the second side walls which are adjacently connected form wave crests, and the inner ends of the first side walls and the inner ends of the second side walls which are adjacently connected form wave troughs;

the angle formed by the adjacent first side wall and the second side wall at the wave crest is a vertex angle alpha, and the angle formed by the adjacent first side wall and the adjacent second side wall at the wave trough is a base angle beta; when the corrugated pipe is in a fully unfolded state, the range of the vertex angle alpha and the base angle beta is 15-75 degrees, and the vertex angle alpha and the base angle beta are not equal; when the bellows is in a fully folded state, both the top angle α and the bottom angle β are 0 °.

Optionally, the extension lines of each two adjacent first side walls intersect, and the extension lines of each two adjacent second side walls intersect.

Optionally, a distance between two adjacent wave troughs is defined as a wave width L, a distance between two adjacent wave crests and wave troughs is defined as a wave height H, and a ratio L of the wave width L to the wave height H is defined as: h is more than or equal to 1.1.

Optionally, the L: h is 1.125-2.33.

Optionally, a distance between an inner end of the first side wall and an outer end of the first side wall along an axial direction of the corrugated pipe is L1, a distance between an inner end of the second side wall and an outer end of the second side wall along an axial direction of the corrugated pipe is L2, and a difference between L1 and L2 is 1 mm-10 mm.

Optionally, the ratio L1 of L1 to L2 is: l2 is 1.25-1.67.

Optionally, adjacent first side walls and second side walls form a non-axisymmetric structure.

Optionally, the cross section of the crest is arc-shaped, and the radius R of the arc-shaped crest is less than or equal to 1mm.

Optionally, the first side wall has a first curvature radius R1, and the first curvature radius R1 is 128-129 mm; the second side wall is provided with a second curvature radius R2, and the second curvature radius R2 is 124-125 mm.

Optionally, the foldable box further includes a first connection portion and a second connection portion, the first connection portion is disposed at one axial end of the corrugated tube, and the first connection portion is provided with at least one first boss or first groove formed by bending and used for being connected with the upper shell of the sound box; the second connecting portion is arranged at the other end of the corrugated pipe in the axial direction, and the second connecting portion is provided with at least one second boss or second groove which is formed by bending and is used for being connected with the lower shell of the sound box.

Optionally, the folding box is made of a thermoplastic resin material.

The above technical solutions in the foldable box provided by the embodiments of the present invention have at least one of the following technical effects: the corrugated pipe of the folding box body comprises a plurality of first side walls and second side walls which are alternately connected along the axial direction, and as crease lines are formed between the first side walls and the second side walls which are adjacently connected, wave crests are formed at the outer ends of the first side walls and the outer ends of the second side walls which are adjacently connected, wave troughs are formed at the inner ends of the first side walls and the inner ends of the second side walls which are adjacently connected, so that the corrugated pipe can be ensured to be compressed or stretched along the axial direction; when the corrugated pipe is compressed along the axial direction, the corrugated pipe can be in a fully folded state, the corrugated pipe cannot rebound, and at the moment, the vertex angle alpha and the bottom angle beta formed between the adjacent first side wall and second side wall are both 0; when the corrugated pipe is stretched along the axial direction, the corrugated pipe can be in a fully unfolded state, and each two adjacent connected first side walls and second side walls of the corrugated pipe can keep the unfolded state by enough supporting force and cannot retract. Therefore, when the folding box body is applied to the sound box, the sound box can be in a fully unfolded state without retraction or in a fully folded state without rebound, and the length of the stretching or compression of the folding box body can be controlled in a proper size range according to requirements, so that the size of the volume of a sound cavity formed in the folding box body is changed, the tone quality of the sound box using the folding box body can be adjusted and changed, the requirement of people on the function diversity of the sound box is met, and the requirement of people on fine life is further met.

The sound box comprises a sound box upper shell, a sound box lower shell and the folding box body, wherein one axial end of the folding box body is connected with the sound box upper shell, the other axial end of the folding box body is connected with the sound box lower shell, at least one of the sound box upper shell and the sound box lower shell is internally provided with a loudspeaker monomer, the other one of the sound box upper shell and the sound box lower shell is provided with a circuit board and a through hole communicated with the corrugated pipe and the outside, a detachable soft plug is arranged in the through hole, and the circuit board is electrically connected with the loudspeaker monomer.

Optionally, the sound box further comprises a protection side shell connected with the sound box upper shell or the sound box lower shell, and the protection side shell is located at the periphery side of the corrugated pipe and used for protecting the corrugated pipe in a folded state.

The above technical solutions in the sound box provided by the embodiments of the present invention have at least one of the following technical effects: the sound box provided by the invention has the advantages that the folding box body is adopted, so that the sound box can be in a completely unfolded or completely folded state by compressing or stretching the folding box body, and the folding box body can be unfolded or folded to a proper size according to requirements, so that the size of the volume of the sound cavity formed in the folding box body is changed, the tone quality of the sound box with the folding box body can be adjusted and changed, the requirement of people on the function diversity of the sound box is met, and the requirements of people on fine life are further met.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a sound box according to an embodiment of the present invention.

Fig. 2 is an exploded view of the sound box in fig. 1.

Fig. 3 is a cut-away view of the loudspeaker of fig. 1.

Fig. 4 is an enlarged schematic view of a partial structure at a in fig. 3.

Fig. 5 is a schematic structural diagram of a foldable box according to an embodiment of the present invention.

Fig. 6 is a cut-away view of the folding case of fig. 5.

Fig. 7 is a graph showing impedance characteristics of a sound box having a 4-inch mid-bass speaker unit in a free space state according to the present embodiment.

Fig. 8 is a graph showing impedance characteristics of the folded box of the sound box according to the present embodiment in a fully unfolded state.

Fig. 9 is a graph showing impedance characteristics of the loudspeaker in the fully folded state at the folded cabinet of the loudspeaker according to the present embodiment.

Fig. 10 is a graph showing impedance characteristics of the loudspeaker in the folded 1/2 state of the folded cabinet of the loudspeaker according to the embodiment.

Fig. 11 is a graph showing comparison of impedance characteristic curves of the volume change of the foldable enclosure of the sound box in three states.

Fig. 12 is a graph showing the frequency response of the folding type speaker box according to the present embodiment in a fully unfolded state.

Fig. 13 is a graph showing the frequency response of the folded box of the sound box according to the present embodiment in a fully folded state.

Fig. 14 is a graph showing the frequency response of the loudspeaker in the folded 1/2 state of the folded cabinet of the loudspeaker according to the embodiment.

Fig. 15 is a graph showing the comparison of frequency response curves of the volume change of the folding type cabinet of the sound box in three states.

Wherein, each reference sign in the figure:

10-folding box 11-corrugated pipe 12-first connecting part

13-second connecting part 20-sound box upper shell 30-sound box lower shell

40-protective side shell 50-speaker unit 60-circuit board

70-cork 11 a-crest 11 b-trough

111-first side wall 112-second side wall 113-crease lines

121-first boss 122-first groove 131-second boss

132-second groove.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to fig. 1 to 15 are exemplary and intended to illustrate embodiments of the present invention and should not be construed as limiting the invention.

In the description of the embodiments of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the embodiments of the present invention and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless explicitly defined otherwise.

In the embodiments of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and include, for example, either permanently connected, removably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present invention will be understood by those of ordinary skill in the art according to specific circumstances.

In one embodiment of the present invention, as shown in fig. 4-5, a foldable box 10 is provided, which is suitable for use in a sound box (see fig. 1 and 3), so that the sound box has foldable and compressible functions. Specifically, the folding case 10 includes a bellows 11 whose inside is hollow and can be compressed or stretched in the axial direction, the hollow inside of the bellows 11 forms a cavity, when it is applied to a sound box, the hollow inside of the bellows 11 can form a sound cavity, and the size of the formed sound cavity can be changed by the bellows 11 compressed or stretched in the axial direction. Wherein the bellows 11 comprises a plurality of first side walls 111 and a plurality of second side walls 112. Wherein, the first side wall 111 and the second side wall 112 are preferably annular structures with certain thickness.

Further, as shown in fig. 4 to 5, with the vertical direction of fig. 4 or 5 defined as the axial direction, each first side wall 111 and each second side wall 112 are alternately connected along the axial direction of the bellows 11 (i.e. the vertical direction of fig. 4 or 5), and a crease line 113 is formed between the adjacent connected first side wall 111 and second side wall 112, that is, when the bellows 11 is folded, the crease line 113 serves as a crease, so that the first side wall 111 and the second side wall 112 can be flexibly connected, so that folding is facilitated. And, the outer ends of the first and second sidewalls 111 and 112, which are adjacently connected, form peaks 11a, and the inner ends of the first and second sidewalls 111 and 112, which are adjacently connected, form valleys 11b. Specifically, the first side wall 111 and the second side wall 112 have a certain elasticity, and when the folding is performed, the first side wall 111 and the second side wall 112 on two sides of the crest 11a or the trough 11b are obliquely attached in a wall deformation bending manner; when stretching, the first side wall 111 and the second side wall 112 on both sides of the crest 11a or the trough 11b are separated in a wall deformation bending manner, thereby realizing the two middle states of folding and unfolding of the corrugated tube 11. Further, the arrangement of the peaks 11a and the troughs 11b ensures that the adjacent first side walls 111 and second side walls 112 do not interfere with each other when the corrugated tube 11 is folded, and the corrugated tube 11 can be effectively folded by gradually reducing the angles of the peaks 11a and the troughs 11b.

Further, as shown in fig. 3 to 4, an angle formed by the adjacent first sidewall 111 and the second sidewall 112 at the peak 11a is a vertex angle α, and an angle formed by the adjacent first sidewall 111 and the second sidewall 112 at the trough 11b is a bottom angle β; when the corrugated pipe 11 is in a fully unfolded state, the range of the vertex angle alpha and the base angle beta is 15-75 degrees, and the vertex angle alpha and the base angle beta are not equal; i.e. the top angle a and the bottom angle β can both be selected within the range of values 15 °, 20 °, 25 °, 30 °, 35 °, 40 °, 45 °, 50 °, 55 °, 60 °, 65 °, 70 ° or 75 °, and ensure that the selected top angle a and bottom angle β are not the same. The angle value of the top angle alpha and the bottom angle beta is favorable for the bending force extension strength of the first side wall 111 and the second side wall 112 of the whole corrugated pipe 11, and the deformation stable supporting force of the wall can be effectively improved when the corrugated pipe 11 is folded and extended.

Further, when the bellows 11 is in the fully folded state, the apex angle α and the base angle β are both 0 °. The angle design between the first side wall 111 and the second side wall 112 in the embodiment effectively ensures that when the corrugated pipe 11 is in a fully unfolded state, enough supporting force is provided between the first side wall 111 and the second side wall 112 to ensure that the corrugated pipe 11 cannot retract automatically, and when the corrugated pipe 11 is in a fully folded state, the first side wall 111 and the second side wall 112 are mutually attached to ensure that the corrugated pipe 11 cannot rebound automatically, so that after the sound box with the folding box body 10 is fully unfolded, the sound box outputs stable sound quality effect at the moment, and the sound box cannot change due to retraction; and when the loudspeaker box with the folding box body 10 is completely folded, the volume is small, the loudspeaker box is favorable for transportation, storage and outgoing carrying, and further the cost of transportation, storage, packaging and the like of the loudspeaker box is reduced, and the cost performance is high.

The bellows 11 of the folding box 10 according to the embodiment of the present invention includes a plurality of first side walls 111 and second side walls 112 that are alternately connected in the axial direction, and since crease lines 113 are formed between the first side walls 111 and the second side walls 112 that are adjacently connected, and peaks 11a are formed at the outer ends of the first side walls 111 and the outer ends of the second side walls 112 that are adjacently connected, valleys 11b are formed at the inner ends of the first side walls 111 and the inner ends of the second side walls 112 that are adjacently connected, it is ensured that the bellows 11 can be compressed or stretched in the axial direction; when the bellows 11 is compressed in the axial direction, the bellows 11 is not rebounded when the bellows 11 is in a fully folded state, and at this time, the apex angle α and the base angle β formed between the adjacent first side wall 111 and second side wall 112 are both 0; when the corrugated tube 11 is stretched along the axial direction, when the corrugated tube 11 is in a fully unfolded state, each two adjacent connected first side walls 111 and second side walls 112 of the corrugated tube 11 can keep the unfolded state by having enough supporting force, and cannot retract, at the moment, the range of the top angle alpha and the bottom angle beta formed between the adjacent first side walls 111 and second side walls 112 is between 15 degrees and 75 degrees, and the top angle alpha and the bottom angle beta are not equal. Therefore, when the folding box 10 is applied to the sound box, the sound box can be in a fully unfolded state without retraction or in a fully folded state without rebound, and the length of the folding box 10 in stretching or compression can be controlled within a proper size range according to requirements, so that the size of the volume of a sound cavity formed in the folding box 10 is changed, the tone quality of the sound box using the folding box 10 can be adjusted and changed, the requirement of people on the diversification of the functions of the sound box is met, and the requirement of people on fine life is further met.

In the following embodiments, the working principle and beneficial effects of the foldable box 10 will be further described by taking the case that the foldable box 10 is applied to a sound box as an example:

in another embodiment of the present invention, as shown in fig. 4 to 6, extension lines of each two adjacent first sidewalls 111 of the foldable box 10 are intersected, and extension lines of each two adjacent second sidewalls 112 are intersected. For example, when the wall surfaces of each adjacent two of the first side walls 111 are flat wall surfaces, then the extension lines of the flat wall surfaces intersect at a point at the distal end, and similarly, when the wall surfaces of each adjacent two of the second side walls 112 are flat wall surfaces, then the extension lines of the flat wall surfaces intersect at a point at the distal end, thus ensuring that when each adjacent two of the first side walls 111 and when each adjacent two of the second side walls 112 are non-parallel wall surfaces. For another example, when the wall surfaces of the first side wall 111 and the second side wall 112 are both curved wall surfaces, then such design also ensures that when each adjacent two of the first side walls 111 and when each adjacent two of the second side walls 112 are non-parallel wall surfaces. The structural design is more beneficial to the bending force extension strength of the first side wall 111 and the second side wall 112 of the whole corrugated pipe 11, and the deformation stable supporting force of the wall can be effectively improved when the corrugated pipe 11 is folded and stretched.

In another embodiment of the present invention, as shown in fig. 4 to 6, a space between two adjacent wave troughs 11b of the folding box 10 is defined as a wave width L, a space between two adjacent wave crests 11a and wave troughs 11b is defined as a wave height H, and a ratio L of the wave width L to the wave height H: h is more than or equal to 1.1. In this embodiment, for example, the wave width L is 23mm, the wave height H is 13mm, L: h=1.77; the wave width L is 15mm, the wave height H is 10mm, L: h=1.5; the wave width L is 18mm, the wave height H is 16mm, L: h=1.125; the wave width L is 7mm, the wave height H is 3mm, L: h=2.33; the wave width L is 6mm, the wave height H is 3mm, L: h=2; wave width L is 8mm, wave height H is 4mm, L: h=2. Preferably, the L: h is 1.125-2.33.

In another embodiment of the present invention, as shown in fig. 4 to 6, a distance between an inner end of the first sidewall 111 and an outer end of the first sidewall 111 of the foldable box 10 along an axial direction of the corrugated tube 11 is L1, a distance between an inner end of the second sidewall 112 and an outer end of the second sidewall 112 along the axial direction of the corrugated tube 11 is L2, and a difference between the L1 and the L2 is 1mm to 10 mm. For example, L1 is 12mm, L2 is 8mm, and the difference between L1 and L2 is 4mm; l1 is 8mm, L2 is 6mm, and the difference between L1 and L2 is 2mm; l1 is 10mm, L2 is 8mm, and the difference between L1 and L2 is 2mm; l1 is 4mm, L2 is 3mm, and the difference between L1 and L2 is 1mm; l1 is 5mm, L2 is 3mm, and the difference between L1 and L2 is 2mm; l1 is 4mm, L2 is 3mm, and the difference between L1 and L2 is 1mm. In this embodiment, the structural design can ensure the bending force stretching strength of the first side wall 111 and the second side wall 112, and can effectively improve the deformation stable supporting force of the walls when the folding and stretching are performed. And ensure that when folding, the distance along the axial direction of the corrugated tube 11 is longer on one side of the first side wall 111 and the second side wall 112, so that a larger accommodating space is formed, a shorter side can be accommodated, and the compressive force support formed after accommodating is reinforced, so that rebound is not easy.

In another embodiment of the present invention, as shown in fig. 4 to 6, a ratio L1 of the L1 to the L2 of the folding box 10 is provided: l2 is 1.25-1.67. For example, L1 is 12mm, L2 is 8mm, L1: l2=1.5; l1 is 8mm, L2 is 6mm, L1: l2=1.33; l1 is 10mm, L2 is 8mm, L1: l2=1.25; l1 is 4mm, L2 is 3mm, L1: l2=1.33; l1 is 5mm, L2 is 3mm, L1: l2=1.67; l1 is 4mm, L2 is 3mm, L1: l2=1.33. Also, in this embodiment, the structural design can ensure the bending force stretching strength of the first side wall 111 and the second side wall 112, and can effectively improve the deformation stable supporting force of the walls when folding and stretching.

In another embodiment of the present invention, as shown in fig. 4 to 6, the adjacent first side wall 111 and the second side wall 112 of the foldable box 10 form a non-axisymmetric structure. Specifically, the crease line 113 formed at the connection position of the first side wall 111 and the second side wall 112 is taken as a central axis, so that the first side wall 111 and the second side wall 112 cannot form symmetry about the central axis, the folded first side wall 111 and the folded second side wall 112 cannot form complete superposition, and therefore when any two interconnected first side walls 111 and second side walls 112 form complete unfolding, sufficient supporting force is provided to ensure the unfolding state, the folding state cannot retract or rebound by themselves, and the structural stability is very good. Namely, the structural design is different from the corrugated pipe 11 with symmetrical structural design in the prior art, so that the corrugated pipe 11 can be fully folded when the corrugated pipe 11 is compressed, and the corrugated pipe 11 can be fully unfolded when the corrugated pipe 11 is stretched; simultaneously, can also adjust the size of the cavity that the cavity of bellows 11 inside formed according to the demand, when this folding box 10 was applied to the audio amplifier on, can realize adjusting the tone quality of audio amplifier, satisfy the demand of difference to tone quality effect.

In another embodiment of the present invention, as shown in fig. 4 to 6, the cross section of the peak 11a of the folding box 10 is provided in an arc shape, and the radius R of the arc-shaped peak 11a is less than or equal to 1mm. For example, the radius R of the arc-shaped peak 11a may be 1mm, 0.9mm, 0.8mm, 0.7mm, or the like, and by designing the cross section of the peak 11a to be arc-shaped, the first side wall 111 and the second side wall 112 at this position can be folded to have a vertex angle α of 0 °, so that the bellows 11 after being fully folded does not rebound.

In another embodiment of the present invention, as shown in fig. 4 to 6, the radius of curvature of the adjacent first side wall 111 and the radius of curvature of the second side wall 112 of the foldable box 10 are not equal. Compared with the prior art in which two adjacent side walls of the bellows 11 are designed with the same radius of curvature, the radius of curvature of the first side wall 111 and the radius of curvature of the second side wall 112 in this embodiment are not equal, so that when the two connected first side walls 111 and second side walls 112 are fully unfolded, sufficient supporting force is ensured between the first side walls 111 and second side walls 112 to ensure that the two side walls are always in an unfolded state, and when the two connected first side walls 111 and second side walls 112 are fully folded, the first side walls 111 and the second side walls 112 can be fully attached without bouncing to cause the first side walls 111 and the second side walls 112 to form an angle again, and of course, the two states are kept under the condition that no external force is applied. Like this, not only can be with bellows 11 folding completely or expansion completely, can also compress with tensile suitable length with the length of bellows 11 according to the demand, can realize adjusting out the sound chamber of equidimension when meeting on it is applied to the audio amplifier, and then realize the regulation change of different tone quality.

In another embodiment of the present invention, as shown in fig. 4, the first sidewall 111 of the folding box 10 has a first radius of curvature R1, where the first radius of curvature R1 is 128 mm-129 mm; for example, the first radius of curvature R1 may be 128mm, 128.1mm, 128.2mm, 128.3mm, 128.4mm, 128.5mm, 128.6mm, 128.7mm, 128.8mm, 128.9mm, or 129mm; the second side wall 112 has a second curvature radius R2, and the second curvature radius R2 is 124 mm-125 mm; for example, the second radius of curvature R2 may be 124mm, 124.1mm, 124.2mm, 124.3mm, 124.4mm, 124.5mm, 124.6mm, 124.7mm, 124.8mm, 124.9mm, or 124mm. In this embodiment, when the radius of curvature of the first side wall 111 is selected to be the above value, the radius of curvature R2 of the second side wall 112 connected to the first side wall 111 is different from the radius of curvature R1 of the first side wall 111, so that when the two connected first side walls 111 and second side walls 112 are fully unfolded, a sufficient supporting force between the first side walls 111 and second side walls 112 can be ensured to be always in an unfolded state, and when the two connected first side walls 111 and second side walls 112 are fully folded, the first side walls 111 and second side walls 112 can be fully attached without bouncing back to cause the first side walls 111 and second side walls 112 to form an angle again.

In another embodiment of the present invention, as shown in fig. 2 and 5 to 6, the folding box 10 of the folding box 10 further includes a first connecting portion 12 and a second connecting portion 13, and preferably, the first connecting portion and the second connecting portion 13 are formed integrally with the bellows 11. The first connecting portion 12 is disposed at one axial end of the bellows 11 and is used for being connected with the upper shell 20 of the sound box, and the second connecting portion 13 is disposed at the other axial end of the bellows 11 and is used for being connected with the lower shell 30 of the sound box. Specifically, in this embodiment, through the first connection portion 12 provided, the adaptive connection between one end of the foldable box 10 and the upper shell 20 of the sound box can be more easily achieved, and similarly, through the second connection portion 13 provided, the adaptive connection between the other end of the foldable box 10 and the lower shell 30 of the sound box can be more easily achieved; in addition, when the folding case 10 needs to be disassembled, the connection between the first connection portion 12 and the upper case 20 of the speaker and the connection between the second connection portion 13 and the lower case 30 of the speaker are also conveniently released. The shape and structure of the first connecting portion 12 and the second connecting portion 13 may be designed and set according to practical requirements, so as to meet the requirements of adapting to different speaker housing structures.

In another embodiment of the present invention, as shown in fig. 5 to 6, the first connecting portion 12 of the provided folding box 10 is provided with at least one first boss 121 or first groove 122 formed by bending and used for connecting with the upper shell 20 of the sound box, that is, the first connecting portion 12 may be connected with the upper shell 20 of the sound box in an adapting manner through one or more first bosses 121/first grooves 122; similarly, the second connecting portion 13 is provided with at least one second boss 131 or second groove 132 formed by bending and used for connecting with the lower enclosure 30, that is, the second connecting portion 13 may be connected with the lower enclosure 30 in an adaptive manner through one or more second bosses 131/second grooves 132. For example, the structure that adopts boss or recess can realize dismantling the connection through the cardboard with the casing of audio amplifier, not only easy to assemble, also be convenient for the later stage to the dismantlement maintenance and the maintenance of audio amplifier. In another embodiment of the present invention, as shown in fig. 1 to 3, the two axial ends of the provided folding box 10 are formed with a head port and a tail port, and the head port and the tail port can be respectively formed on the first connecting portion 12 and the second connecting portion 13 and are communicated with the hollow interior of the bellows 11.

In another embodiment of the present invention, as shown in fig. 5, the corrugated tube 11 of the folding case 10 is provided with both axial ends forming peaks 11a by the first side wall 111 and the second side wall 112.

In another embodiment of the present invention, the folding case 10 is provided to be made of a thermoplastic resin material, i.e., the bellows 11 is made of a thermoplastic resin material. Specifically, the bellows 11 is integrally formed by a blow molding process, preferably polypropylene, and of course, the bellows 11 may be made of thermoplastic resin material such as polyethylene, polyester, etc., so as to form the bellows 11 having a bellows structure, and the bellows 11 has a plurality of first side walls 111 and second side walls 112, and crease lines 113 formed between the first side walls 111 and the second side walls 112.

In another embodiment of the present invention, the folding case 10 is provided to be made of a thermoplastic resin material, that is, the bellows 11, and the first and second connection parts 12 and 13 are made of a thermoplastic resin material to be the folding case 10.

In another embodiment of the present invention, as shown in fig. 1 to 3, the sound box includes a sound box upper shell 20, a sound box lower shell 30, and the above-mentioned folding box body 10, one axial end of the folding box body 10 is connected with the sound box upper shell 20, the other axial end of the folding box body 10 is connected with the sound box lower shell 30, at least one of the sound box upper shell 20 and the sound box lower shell 30 is internally provided with a speaker unit 50, and the other of the sound box upper shell 20 and the sound box lower shell 30 is provided with a circuit board 60 and a through hole (not shown) for communicating the bellows 11 with the outside, the through hole is provided with a detachable soft plug 70, and the circuit board 60 is electrically connected with the speaker unit 50, wherein, the circuit board 60 and the speaker unit 50 are all in the structure of the prior art, and typically, the circuit board 60 is integrated with components such as an IC chip, a lamp tube, a battery, an audio interface, a function key, and an electric wire; the speaker unit 50, the folding case 10, the upper case 20 and the lower case 30 together form an acoustic chamber, and the size of the acoustic chamber can be adjusted by compressing or stretching the folding case 10. After the cork 70 is taken out, the cork is communicated with the hollow of the corrugated pipe 11 of the folding box body 10 through the through hole, so that the folding box body 10 can be compressed or stretched, the folding box body 10 can realize the discharge or suction of air, and further the expansion or folding of the sound box is realized.

Because the loudspeaker box provided by the embodiment of the invention uses the folding box body 10, the loudspeaker box can be in a fully unfolded or fully folded state by compressing or stretching the folding box body 10, and the folding box body 10 can be unfolded or folded to a proper size according to requirements, so that the size of the volume of the sound cavity formed in the folding box body 10 is changed, and the tone quality of the loudspeaker box using the folding box body 10 can be adjusted and changed, the requirement of people on the function diversification of the loudspeaker box is met, and the requirement of people on fine life is further met.

In another embodiment of the present invention, as shown in fig. 1 to 3, the provided sound box further includes a protective side case 40 connected to the upper case 20 of the sound box, and the protective side case 40 is located at a side of a circumference of the corrugated tube 11 and is used for protecting the corrugated tube 11 in a folded state. Specifically, when the bellows 11 is fully folded or partially folded, it is accommodated in the protective side case 40, so that the bellows 11 can be protected by the protective side case 40. The protective side shell 40 may be integrally formed with the upper enclosure 20, or the protective side shell 40 may be detachably connected with the upper enclosure 20.

In another embodiment of the present invention, as shown in fig. 1 to 3, the provided sound box further includes a protective side shell 40 connected to the lower shell 30 of the sound box, where the protective side shell 40 is located at a side of the periphery of the corrugated tube 11 and is used for protecting the corrugated tube 11 in a folded state. Specifically, when the bellows 11 is fully folded or partially folded, it is accommodated in the protective side case 40, so that the bellows 11 can be protected by the protective side case 40. The protective side shell 40 may be integrally formed with the lower speaker shell 30, or the protective side shell 40 may be detachably connected with the lower speaker shell 30.

In this embodiment, the speaker unit 50 can work normally in the unfolded or folded state, and the volume change of the folded box 10 is adjusted by pulling the length of the folded box 10, so as to realize diversified music styles.

The effect of the volume change of the folding box 10 of the loudspeaker box on the sound is illustrated by a practical test.

The test provides a 4 inch middle bass speaker unit 50, which is arranged in a sound box upper shell 20 of a folding box body 10 made of polypropylene material with an outer diameter of 158mm and a height of 165mm, of course, the sound box upper shell 20 can also be perfectly showing high-frequency sound, a 1 inch tweeter unit is also arranged in the sound box upper shell 20 and is responsible for sounding high-frequency sound, wherein the speakers are connected by wires, and a capacitor is used for dividing frequency to form a two-sound-path folding sound box with a closed cavity volume.

As shown in fig. 7, in an embodiment of the present invention, a 4 inch mid-bass speaker unit 50 is shown, which is an impedance characteristic diagram in free space, wherein the resonant frequency FO:80HZ.

As shown in fig. 8, the folding case 10 is stretched to 100%, i.e., the fully opened state, and the folding case 10 obtains the maximum cavity volume, and it is found that the impedance curve 120HZ thereof generates a resonance peak around and a lower resonance peak around 35HZ through the test.

Through analysis, the low-frequency response of the folding box 10 of the loudspeaker box provided by the embodiment of the invention has two impedance resonance peaks, which are relatively close to the impedance characteristics of the passive radiation loudspeaker box, so that the folding box 10 participates in resonance radiation by the acoustic characteristics of the elastic box.

The low frequency of the bass is extended, the bass is better in sound sense, the bass is full, the bass is high in sound definition, the distortion is better in control, and the bass is suitable for indoor places such as bedroom study rooms.

As shown in fig. 9, the folding type case 10 to 100%, i.e., the fully folded state, is compressed, and the folding type case 10 obtains the smallest cavity volume, and it is found that the impedance curve thereof generates a resonance peak around 140Hz and a lower resonance peak around 48Hz through the test.

By analysis, the folding box 10 of the sound box is compressed, the volume of the cavity is reduced, the overall resonant frequency of the folding box 10 is increased, the frequency response characteristic is shown in fig. 13, compared with the folding box 10 in a fully unfolded state, the lower frequency is 65Hz-100Hz, the sound pressure is reduced by about 1-3dB, the sound pressure is increased by about 1-3dB in a middle bass 100Hz-250Hz frequency band, the sound pressure is increased by about 1-3dB at a middle high frequency, due to the changes of the shape, the height and the volume of the cavity of the box, and the box structure which is different from the traditional sound box hard shell material is added.

As shown in fig. 10, the case is optionally compressed to 50%, that is, the foldable case 10 is in a semi-folded state, and its volume is between the above two states, and it is found that a resonance peak is generated around 130Hz of its impedance curve and a lower resonance peak is generated around 40Hz by testing its parameter characteristics.

As can be seen from analysis, the resonance peak characteristic and the frequency response characteristic of the impedance curve are shown in FIG. 14, which is between the two states of the fully opened and fully folded folding type case 10, but in the middle-high frequency band, 1KHz-4KHz, the frequency response curve is smoother, meaning that the sound in the frequency band is less distorted, and the sound is better restored.

As shown in FIG. 11, as shown in FIG. 15, the comparison of the impedance characteristic curve and the frequency response characteristic curve of the folding box 10 of the sound box in three states shows that the folding box 10 of the sound box in the embodiment of the invention has obvious sound changes of low frequency and medium and high frequency by adjusting the volume change of the folding box 10, realizes diversified music styles, meets different places and different user preferences, and has wide product application.

In summary, the sound box using the foldable box 10 according to the embodiment of the present invention has at least the following advantages:

1. the folding box 10 is a wave bending link technology, can be unfolded when in use, can be folded and folded when not in use, is used for loudspeaker box products, and is beneficial to transportation, storage and outgoing carrying.

2. The sound box product is interesting and practical, has simple and elegant structure, low production cost, high added value and high quality and low price.

3. Under the unfolding or folding state of the loudspeaker box, the loudspeaker unit 50 can work normally, the volume change of the folding box 10 is regulated by pulling the length of the folding box 10, diversified music styles are realized, different places are satisfied, different user favorites are met, and the product application is wide.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims

1. A collapsible container comprising a bellows hollow in the interior and capable of axial compression or stretching, the bellows comprising a plurality of first side walls and a plurality of second side walls;

2. A folding carton as claimed in claim 1 wherein the extensions of each adjacent two of the first side walls intersect and the extensions of each adjacent two of the second side walls intersect.

3. A folding carton according to claim 1, wherein the spacing between two adjacent wave troughs is defined as the wave width L, the spacing between adjacent wave crests and wave troughs is defined as the wave height H, and the ratio L of the wave width L to the wave height H is defined as: h is more than or equal to 1.1.

4. A folding case according to claim 3, wherein said L: h is 1.125-2.33.

5. The collapsible housing of claim 1 wherein the distance between the inner end of the first side wall and the outer end of the first side wall in the axial direction of the bellows is L1, the distance between the inner end of the second side wall and the outer end of the second side wall in the axial direction of the bellows is L2, and the difference between L1 and L2 is between 1mm and 10 mm.

6. The folding box according to claim 5, characterized in that the ratio L1 of L1 to L2 is L1: l2 is 1.25-1.67.

7. The folding carton of claim 1, wherein adjacent first side walls and second side walls form a non-axisymmetric structure.

8. The folding box according to claim 1, wherein the cross section of the peak is arc-shaped, and the radius R of the arc-shaped peak is equal to or less than 1mm.

9. The folding box of claim 1, wherein the first sidewall has a first radius of curvature R1, the first radius of curvature R1 being between 128mm and 129mm; the second side wall is provided with a second curvature radius R2, and the second curvature radius R2 is 124-125 mm.

10. The foldable box body according to any one of claims 1 to 8, further comprising a first connecting portion and a second connecting portion, wherein the first connecting portion is disposed at one axial end of the corrugated tube, and the first connecting portion is provided with at least one first boss or first groove which is formed by bending and is used for being connected with an upper shell of the sound box; the second connecting portion is arranged at the other end of the corrugated pipe in the axial direction, and the second connecting portion is provided with at least one second boss or second groove which is formed by bending and is used for being connected with the lower shell of the sound box.

11. The folding box according to any one of claims 1 to 8, wherein the folding box is made of a thermoplastic resin material.

12. The utility model provides a sound box, includes sound box epitheca and sound box inferior valve, its characterized in that, the sound box still includes the folding box of any one of claims 1~11, folding box axial one end with the sound box epitheca is connected, folding box axial other end with the sound box inferior valve is connected, the sound box epitheca with at least one embeds in the sound box inferior valve has the speaker monomer, just the sound box epitheca with another in the sound box inferior valve is provided with circuit board and intercommunication bellows and outside through-hole, be provided with detachable cork in the through-hole, the circuit board with speaker monomer electric connection.

13. The sound box of claim 12, further comprising a protective side shell connected to the sound box upper shell or the sound box lower shell, the protective side shell being located circumferentially laterally of the bellows and configured to protect the bellows in a folded state.