Sealed speaker, display device and test method for sealed speaker

Abstract

Provided are a sealed sound box, a display device including the same, and a test method for the sealed sound box. The sealed sound box comprises: a box body; a chamber, the chamber is surrounded by the box body; a through hole, the through hole passes through the box body and communicates with the chamber; and a plug, at least a portion of the plug is inserted into the through hole, wherein the plug comprises a plug body and an air vent passing through the plug body, the air vent communicates the chamber with the external space of the box body.

Description

Technical Field

[0001] The present disclosure relates to the technical field of sound boxes, and in particular to a closed sound box, a display device including the closed sound box, and a testing method for the closed sound box. Background Art

[0002] The speaker is the terminal of the entire sound system. It is a device that converts audio electrical energy into corresponding sound energy and radiates it into space. The speaker generally includes main components such as speakers, cabinets and crossovers. Among them, the cabinet can be used to eliminate the acoustic short circuit of the speaker, suppress the acoustic resonance of the speaker and widen the frequency response range of the speaker, thereby reducing the distortion of the sound.

[0003] According to the internal structure of the cabinet, the speakers can be classified into closed type, bass reflex type and bandpass type. Among them, the speakers of the closed type are installed in a completely closed cabinet, so that the reverse phase sound waves radiated backward by the diaphragm of the speaker are completely blocked by the cabinet and will not run out of the cabinet and cancel out the positive phase sound waves in front of the diaphragm, thus solving the problem of "sound short circuit". Summary of the invention

[0004] Embodiments of the present disclosure provide a sealed sound box, a display device including the sealed sound box, and a testing method for the sealed sound box.

[0005] In one aspect, there is provided a closed speaker, comprising:

[0006] Box;

[0007] a chamber, wherein the chamber is surrounded by the box body;

[0008] a through hole, the through hole penetrating the box body and communicating with the chamber; and

[0009] a plug, at least a portion of which is inserted into the through hole,

[0010] The plug includes a plug body and an air vent penetrating the plug body, and the air vent connects the chamber with the external space of the box.

[0011] For example, the plug includes a central axis extending along the length direction of the plug body, and a size of the air-permeable hole in a direction perpendicular to the central axis is smaller than a size of the through hole in a direction perpendicular to the central axis.

[0012] For example, a size of the vent hole in a direction perpendicular to the central axis is less than or equal to 1 / 10 of a size of the through hole in a direction perpendicular to the central axis.

[0013] For example, the size of the air vent in a direction perpendicular to the central axis is associated with the volume of the chamber.

[0014] For example, the size of the air vent in the direction along the central axis is associated with the size of the air vent in the direction perpendicular to the central axis.

[0015] For example, the plug body includes a head, a neck and a tail, the neck is located between the head and the tail in the direction along the central axis, and the size of the neck in the direction perpendicular to the central axis is smaller than the size of the head in the direction perpendicular to the central axis.

[0016] For example, the ventilation hole penetrates the head, the neck and the tail in the direction along the central axis.

[0017] For example, the tail portion includes a tapered portion and a cylindrical portion, the tapered portion is closer to the neck portion than the cylindrical portion, and a dimension of the tapered portion in a direction perpendicular to the central axis gradually decreases from the neck portion toward the cylindrical portion.

[0018] For example, a portion of the tapered portion close to the neck has a first dimension in a direction perpendicular to the central axis, and a dimension of the neck in a direction perpendicular to the central axis is smaller than the first dimension of the tapered portion.

[0019] For example, the through hole includes a first through hole and a second through hole, and a size of the first through hole in a direction perpendicular to the central axis is larger than a size of the second through hole in a direction perpendicular to the central axis.

[0020] For example, a hole wall of the first through hole contacts an outer surface of the head, and a hole wall of the second through hole contacts an outer surface of the neck.

[0021] For example, the head of the plug includes a first stepped surface facing the neck, the box body includes a protrusion, the protrusion includes a first surface facing the head, and the first stepped surface contacts the first surface.

[0022] For example, the tapered portion of the plug includes a second stepped surface facing the neck portion, the protruding portion includes a second surface facing the tail portion, and the second stepped surface contacts the second surface.

[0023] For example, the plug body is made of elastic material.

[0024] For example, the tail is located within the chamber.

[0025] For example, the size of the neck in the direction along the central axis is equal to the size of the second through hole in the direction along the central axis, and the size of the head in the direction along the central axis is equal to the size of the first through hole in the direction along the central axis.

[0026] For example, the orthographic projection of any one of the through hole, the plug body and the vent hole in a direction perpendicular to the central axis is a circle.

[0027] For example, the sealed speaker includes only 1 of the plugs.

[0028] In another aspect, a display device is provided, comprising the above-mentioned closed sound box.

[0029] In yet another aspect, a method for testing a sealed speaker according to the above is provided, comprising:

[0030] Before the plug is inserted into the through hole, inflating the chamber through the through hole;

[0031] Performing airtightness test on the speaker; and

[0032] After the airtightness test is completed, at least a portion of the plug is inserted into the through hole.

[0033] In the embodiments of the present disclosure, by designing the structure of a closed speaker, the air pressure inside and outside the speaker can be balanced, and the heat accumulated inside the speaker can be discharged in time, thereby improving the product quality of the speaker and the display device including it. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Other objects and advantages of the present disclosure will be apparent from the following description of the present disclosure with reference to the accompanying drawings, and will help to have a comprehensive understanding of the present disclosure.

[0035] Figure 1 is a schematic cross-sectional view of a sealed speaker in the related art;

[0036] Figure 2 is a schematic cross-sectional view of another sealed speaker in the related art;

[0037] Figure 3 is a front view of a sealed speaker according to an embodiment of the present disclosure;

[0038] Figure 4 is a rear view of a sealed speaker according to an embodiment of the present disclosure;

[0039] Figure 5 is a top view of a sealed speaker according to an embodiment of the present disclosure;

[0040] Figure 6 is a side view of a sealed speaker according to an embodiment of the present disclosure;

[0041] Figure 7 is a cross-sectional view of a sealed speaker according to an embodiment of the present disclosure;

[0042] Figure 8 shows a partial enlarged view of a sealed speaker according to an embodiment of the present disclosure, schematically showing a plug in an assembled state;

[0043] Fig. 9 A partial enlarged view of a sealed speaker according to an embodiment of the present disclosure is shown, schematically showing a plug in a separated state;

[0044] Fig. 10A is a front view of a plug included in a sealed speaker according to an embodiment of the present disclosure;

[0045] Fig. 10B is a top view of a plug included in a sealed speaker according to an embodiment of the present disclosure;

[0046] Fig. 10C is a cross-sectional view of a plug included in a sealed speaker according to an embodiment of the present disclosure;

[0047] Fig.11 is a schematic diagram of a display device including the sealed sound box according to an embodiment of the present disclosure; and

[0048] Fig.12 It is a flow chart of a testing method for a closed speaker according to an embodiment of the present disclosure.

[0049] It should be noted that, for the sake of clarity, in the drawings used to describe the embodiments of the present disclosure, the sizes of layers, structures or regions may be enlarged or reduced, that is, these drawings are not drawn according to the actual scale. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0051] Unless otherwise defined, the technical terms or scientific terms used in this disclosure should be understood by ordinary technicians in the field. "First", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0052] In this document, unless otherwise specifically stated, directional terms such as "upper", "lower", "left", "right", "inner", "outer", "front", "back", etc. are used to indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing the present disclosure, and do not indicate or imply that the device, element or component referred to must have a specific orientation, be constructed or operate in a specific orientation. It should be understood that when the absolute position of the described object changes, the relative positional relationship they represent may also change accordingly. Therefore, these directional terms should not be understood as limiting the present disclosure.

[0053] In this document, the expression "central axis" refers to the axis of an object or a hole along the direction in which the object or the hole extends in length. Generally, the object or the hole extends along its central axis. It should be understood that the central axis is an imaginary line used to indicate the direction in which the object or the hole extends, and does not mean that the object or the hole has a solid central axis; moreover, the central axis of an object or a hole is not necessarily a straight line, but can be a straight line, a curve or a broken line.

[0054] Moreover, in this document, the expressions "dimension in a direction perpendicular to the central axis" and "dimension in a direction along the central axis" are used to indicate the sizes of the object or the hole in two directions. For example, for a through hole or air vent with a circular cross section, "dimension in a direction perpendicular to the central axis" refers to the diameter of the through hole or air vent, and "dimension in a direction along the central axis" refers to the length of the through hole or air vent.

[0055] Figure 1 is a schematic cross-sectional view of a sealed speaker in the related art. Figure 1As shown, a closed sound box generally includes a box body 1 and a speaker 2 as main components. The box body 1 surrounds a chamber 3, and the speaker 2 is installed in the box body 1, thereby forming a closed chamber 3. In this way, the reverse phase sound waves radiated backward by the diaphragm of the speaker are completely blocked by the box body, and will not run out of the box body and offset the positive phase sound waves in front of the diaphragm, thus solving the "sound short circuit" problem. However, in this closed sound box, the space inside the box body 1 (i.e., the chamber 3) is completely isolated from the space outside the box body 1. In this way, when the speaker is used in different environments (such as low pressure environment, high pressure environment), the air pressure in the space inside the box body 1 (i.e., the chamber 3) is inconsistent with the air pressure in the space outside the box body 1, that is, the air pressure inside and outside the box cannot reach equilibrium, thereby affecting the acoustic characteristics of the speaker and even affecting the life of the speaker. Furthermore, when the speaker is working, some heat will accumulate inside the box. Since the space inside the box 1 (i.e., the chamber 3) is completely isolated from the space outside the box 1, the accumulated heat cannot be discharged, which further affects the acoustic characteristics of the speaker and even the life of the speaker. In addition, since the sealed speaker has no holes for inflation, it is impossible to perform an airtightness test after the sealed speaker product is manufactured, which is not conducive to ensuring the stability of product quality.

[0056] In order to overcome the above-mentioned defects, a closed sound box with ventilation holes is proposed in the related art. Figure 2 FIG. 1 is a schematic cross-sectional view of another closed-type speaker in the related art. Figure 2 As shown, the speaker box includes main components such as a box body 1 and a speaker 2. The box body 1 surrounds a chamber 3, and the speaker 2 is installed in the box body 1. An air vent 4 is provided on the shell of the box body 1. In order to reduce the manufacturing difficulty and shorten the inflation time during the air tightness test, the aperture of the air vent 4 is generally designed to be larger. However, for a speaker box with a large-aperture air vent 4, when it is working, a large air flow sound may be generated at the large-aperture air vent 4, which may cause abnormal sound, thereby affecting the acoustic characteristics of the speaker box.

[0057] In order to resolve the above contradiction, an embodiment of the present disclosure proposes a closed speaker. Figure 3 is a front view of a sealed speaker according to an embodiment of the present disclosure, Figure 4 is a rear view of a closed speaker according to an embodiment of the present disclosure, Figure 5 is a top view of a closed speaker according to an embodiment of the present disclosure, Figure 6 is a side view of a closed speaker according to an embodiment of the present disclosure. Figure 3-Figure 6The speaker box includes: a box body 10, a speaker 20, a chamber 30 and a radiator 40. The box body 10 defines the chamber 30. Specifically, the box body 10 includes a front shell 11 and a rear shell 12, and the front shell 11 and the rear shell 12 are assembled together to form the chamber 30. A part of the front shell 11 constitutes a sound output panel 14 of the speaker box. A part of the speaker 20 is arranged in the chamber 30, and another part of the speaker 20 is arranged on the sound output panel 14.

[0058] It should be understood that a speaker is a device that converts an electrical signal into an acoustic signal, and it mainly includes components such as a coil, a magnet, and a paper cone. The amplifier outputs current (alternating current) signals of varying magnitudes, and the coil moves under the action of a magnetic field. The coil is connected to the paper cone to drive the paper cone to vibrate, and the vibration of the paper cone pushes the air, thereby producing sound. For example, the speaker 20 can be a woofer speaker. The specific structure of the speaker can refer to the specific structure of the speaker in the related art, and will not be repeated here.

[0059] The radiator 40 may be a passive radiator. For example, the passive radiator may include a paper cone but does not include a coil and a magnet. In the embodiment of the present disclosure, the speaker 20 serves as an active unit and the radiator 40 serves as a passive unit. The radiator 40 passively emits sound under the influence of the speaker 20 on the air in the chamber 30. The specific structure of the radiator 40 can refer to the specific structure of the passive radiator in the related art, which will not be repeated here.

[0060] Optionally, the sound box may include a speaker 20 and a plurality of radiators 40. For example, one radiator 40 may be disposed on the sound output panel 14, one radiator 40 may be disposed on the rear shell 12, and four radiators 40 may be disposed at four corners of the front shell 11, respectively. The number and position of the radiators shown in the figure are only exemplary, and the embodiment of the present disclosure does not impose any particular limitation on the number and position of the radiators.

[0061] The speaker 20 and the radiator 40 are both fixed to the front shell 11 and / or the rear shell 12 of the box body 10 through a fixing element 50. For example, the fixing element may be a screw.

[0062] Figure 7 is a cross-sectional view of a sealed speaker according to an embodiment of the present disclosure. Figure 7 As shown, the speaker box further includes a plug 60. Figure 4 , Figure 6 and Figure 7 The speaker box includes a plug 60, and the plug 60 is disposed at a position close to the lower side of the rear housing 12. However, the embodiment of the present disclosure is not intended to limit the location of the plug, and in other embodiments, the plug 60 may be disposed at any other suitable location.

[0063] Figure 8 shows a partial enlarged view of a sealed speaker according to an embodiment of the present disclosure, schematically showing a plug in an assembled state; Fig. 9 FIG. 1 shows a partially enlarged view of a sealed speaker according to an embodiment of the present disclosure, which schematically shows the plug in a separated state. Figure 8 and Fig. 9 The speaker box includes a through hole 70 disposed on the box body 10, and the through hole 70 can penetrate the box body 10. For example, the through hole 70 can be disposed on the rear shell 12 of the box body 10 and penetrate the rear shell 12. The through hole 70 communicates the chamber 30 with the space outside the box body 10. The plug 60 is inserted into the through hole 70.

[0064] Fig. 10A is a front view of a plug included in a sealed speaker according to an embodiment of the present disclosure, Fig. 10B is a top view of a plug included in a sealed speaker according to an embodiment of the present disclosure, Fig. 10C is a cross-sectional view of a plug included in a sealed speaker according to an embodiment of the present disclosure. Figure 8 , Fig. 9 and Figure 10A-10C The plug 60 includes a plug body 61 and a vent hole 62 penetrating the plug body 61. When the plug 60 is inserted into the through hole 70, the vent hole 62 communicates with the chamber 30 and the space outside the box body 10.

[0065] The plug body 61 includes a head 611, a neck 612, and a tail 613. The neck 612 is located between the head 611 and the tail 613. The tail 613 may include a tapered portion 6131 and a cylindrical portion 6132.

[0066] For example, the plug 60 may include a central axis 60S extending along its length direction. It should be understood that the central axis 60S is an imaginary straight line and does not mean that the plug 60 has a physical central axis. The vent 62 and the plug body 61 both extend along the central axis 60S. In one example, the orthographic projections of the vent 62 and the plug body 61 in a direction perpendicular to the central axis 60S both have a circular shape, such as Fig. 10B Optionally, the center of the positive projection of the vent hole 62 in a direction perpendicular to the central axis 60S (eg Fig. 10B The center of the circle 62) and the center of the orthographic projection of the plug body 61 in a direction perpendicular to the central axis 60S (for example Fig. 10B The center of the circle 611 coincides.

[0067] The head 611, the neck 612, the tapered portion 6131 and the cylindrical portion 6132 are sequentially arranged in a direction parallel to the central axis 60S. The dimension of the tapered portion 6131 in a direction perpendicular to the central axis 60S gradually decreases from the neck 612 toward the cylindrical portion 6132. For example, the portion of the tapered portion 6131 close to the neck 612 has a first dimension, and the portion of the tapered portion 6131 close to the cylindrical portion 6132 has a second dimension, and the first dimension is greater than the second dimension.

[0068] The size of the neck 612 in a direction perpendicular to the central axis 60S (eg Fig. 10C The dimension w in the figure is smaller than the dimension of the head 611 in the direction perpendicular to the central axis 60S (e.g. Fig. 10B The diameter of the circle 611 in the middle is smaller than the first dimension of the conical portion 6131 in the direction perpendicular to the central axis 60S (for example Fig. 10B In this way, a first step surface is formed between the head 611 and the neck 612, that is, a surface 614 of the head 611 facing the neck 612; a second step surface is formed between the neck 612 and the tapered portion 6131, that is, a surface 615 of the tapered portion 6131 facing the neck 612. It should be understood that the first step surface 614 and the second step surface 615 are both farther away from the central axis 60S than the neck 612.

[0069] Accordingly, if Figure 8 As shown, the through hole 70 is in the form of a stepped hole. The through hole 70 may include a central axis 70S extending along its length direction. It should be understood that the central axis 70S is an imaginary straight line and does not mean that the through hole 70 has a solid central axis. When the plug 60 is inserted into the through hole 70, the central axis 60S coincides with the central axis 70S. In one example, the orthographic projection of the through hole 70 in a direction perpendicular to the central axis 70S has a circular shape. The through hole 70 includes a first through hole 701 and a second through hole 702, and the size (e.g., diameter) of the first through hole 701 in a direction perpendicular to the central axis 70S is greater than the size (e.g., diameter) of the second through hole 702 in a direction perpendicular to the central axis 70S. When the plug 60 is inserted into the through hole 70, the head 611 cooperates with the first through hole 701, that is, the outer surface of the head 611 contacts the hole wall of the first through hole 701; the neck 612 cooperates with the second through hole 702, that is, the outer surface of the neck 612 contacts the hole wall of the second through hole 702.

[0070] In this embodiment, the through hole 70 is disposed on the rear shell 12 of the box body 10, and the step hole 70 will correspondingly form a step-shaped structure on the rear shell 12. Figure 8As shown, the hole wall of the second through hole 702 is closer to the central axis 70S than the hole wall of the first through hole 701, so that the rear shell 12 has a protrusion 121, and the protrusion 121 is sandwiched between the head 611 and the tapered portion 6131. ​​More specifically, the protrusion 121 has a first surface 1211 facing the head 611 and a second surface 1212 facing the tapered portion 6131, the first surface 1211 contacts the first step surface 614, and the second surface 1212 contacts the second step surface 615.

[0071] For example, the plug 60 is made of elastic materials such as rubber, silicone, etc. In this way, the plug 60 can be elastically deformed under the action of external force. In this way, since materials such as rubber and silicone are relatively soft, it is not easy to produce resonance sound, thereby not affecting the acoustic characteristics of the speaker.

[0072] The dimension of the cylindrical portion 6132 of the plug 60 in a direction perpendicular to the central axis 60S (eg Fig. 10B The diameter of the circular portion 6132 in the through hole 70 may be less than or equal to the size (eg, diameter) of the second through hole 702 in a direction perpendicular to the central axis 70S. In this way, the cylindrical portion 6132 may be conveniently inserted into the through hole 70 and pass through the through hole 70 into the chamber 30.

[0073] The portion of the conical portion 6131 close to the neck 612 has a first size, and the portion of the conical portion 6131 close to the cylindrical portion 6132 has a second size. The first size is greater than the second size, that is, Figure 8 The structure of "small at the bottom and large at the top" shown in FIG. For example, the second size is less than or equal to the size (e.g., diameter) of the second through hole 702 in the direction perpendicular to the central axis 70S, and the first size is greater than the size (e.g., diameter) of the second through hole 702 in the direction perpendicular to the central axis 70S, and is less than or equal to the size (e.g., diameter) of the first through hole 701 in the direction perpendicular to the central axis 70S. In this way, when the plug 60 is inserted into the through hole 70, the tapered portion 6131 is elastically deformed under the extrusion force of the rear shell 12, and the structure of "small at the bottom and large at the top" is conducive to the tapered portion 6131 passing through the first through hole 701 and the second through hole 702 in sequence, thereby entering the chamber 30. After entering the chamber 30, the tapered portion 6131 returns to its original state, so that the plug 60 will not detach from the through hole 70.

[0074] The size of the neck 612 in the direction perpendicular to the central axis 60S may be equal to the size of the second through hole 702 in the direction perpendicular to the central axis 70S, so that the outer surface of the neck 612 contacts the hole wall of the second through hole 702. Optionally, the size of the neck 612 in the direction perpendicular to the central axis 60S may also be slightly larger than the size of the second through hole 702 in the direction perpendicular to the central axis 70S, so that a tight fit (i.e., an interference fit) is formed between the neck 612 and the second through hole 702. It should be understood that "slightly larger" here means that the difference between the size of the neck 612 in the direction perpendicular to the central axis 60S and the size of the second through hole 702 in the direction perpendicular to the central axis 70S is within the tolerance range of the two.

[0075] The size of the head 611 in the direction perpendicular to the central axis 60S may be equal to the size of the first through hole 701 in the direction perpendicular to the central axis 70S, so that the outer surface of the head 611 contacts the hole wall of the first through hole 701. Optionally, the size of the head 611 in the direction perpendicular to the central axis 60S may also be slightly larger than the size of the first through hole 701 in the direction perpendicular to the central axis 70S, so that a tight fit (i.e., interference fit) is formed between the head 611 and the first through hole 701. It should be understood that "slightly larger" here means that the difference between the size of the head 611 in the direction perpendicular to the central axis 60S and the size of the first through hole 701 in the direction perpendicular to the central axis 70S is within the tolerance range of the two.

[0076] In this embodiment, such a design can ensure that the plug 60 is locked in the through hole 70 , thereby preventing the plug 60 from being separated from the through hole 70 .

[0077] The air hole 62 passes through the plug body 61, that is, the air hole 62 passes through the head 611, the neck 612, the conical portion 6131 and the cylindrical portion 6132 along the central axis 60S. When the plug 60 is inserted into the through hole 70, the air hole 62 connects the chamber 30 with the space outside the box 10. In this way, the air hole 62 can play the role of connecting the space inside and outside the box, so that the air pressure inside and outside the box can be balanced, so that the speaker can adapt to different environments (such as low pressure environment, high pressure environment). In addition, when the speaker is working, the heat accumulated inside the box can also be discharged through the air hole, which is conducive to improving the acoustic characteristics that affect the speaker and prolonging the life of the speaker.

[0078] For example, the size of the vent hole 62 in a direction perpendicular to the central axis 60S (eg Fig. 10B The diameter of the middle circle 62 is smaller than the size of any one of the first through hole 701 and the second through hole 702 in the direction perpendicular to the central axis 70S. For another example, the size of the vent hole 62 in the direction perpendicular to the central axis 60S (for example Fig. 10B The diameter of the middle circle 62) is much smaller than the size of any one of the first through hole 701 and the second through hole 702 in the direction perpendicular to the central axis 70S. "Much smaller than" here can be understood as the size of the air-permeable hole 62 in the direction perpendicular to the central axis 60S is not in the same order of magnitude as the size of any one of the first through hole 701 and the second through hole 702 in the direction perpendicular to the central axis 70S. For example, the size of the air-permeable hole 62 in the direction perpendicular to the central axis 60S can be 1 μm, that is, at the μm level. At this time, the size of any one of the first through hole 701 and the second through hole 702 in the direction perpendicular to the central axis 70S can be 1 mm, that is, at the mm level; for another example, the size of the air-permeable hole 62 in the direction perpendicular to the central axis 60S can be 1 mm, that is, at the mm level. At this time, the size of any one of the first through hole 701 and the second through hole 702 in the direction perpendicular to the central axis 70S can be 1 cm, or even 1 m, that is, at the cm or m level. In other words, the size of the vent hole 62 in the direction perpendicular to the central axis 60S (eg Fig. 10B The diameter of the middle circle 62 may be less than or equal to 1 / 10 of the dimension of any one of the first through hole 701 and the second through hole 702 in the direction perpendicular to the central axis 70S.

[0079] With such a design, the air tightness test can be performed when the plug 60 is not inserted into the through hole 70. Since the through hole 70 has a large aperture, the gas can quickly enter the chamber 30, so that the air tightness test can be completed quickly. After the plug 60 is inserted into the through hole 70, only the air vent 62 with a smaller aperture is left to connect the space inside and outside the chamber. Since the aperture of the air vent 62 is very small, the air vent 62 can achieve balanced air pressure and discharge heat while avoiding abnormal sounds caused by gas flow, so as not to affect the acoustic characteristics of the speaker. In this way, it is beneficial to improve the acoustic characteristics of the speaker and increase the service life of the speaker. In addition, if a small-aperture air vent is directly formed on the box without providing a plug, then the mold structure for manufacturing the box needs to be changed. Moreover, the box is generally made of hard plastic, wood and other materials. Forming a small-aperture air vent on it will increase the difficulty of manufacturing. In comparison, in the embodiments of the present disclosure, since the plug is made of elastic materials such as rubber, silicone, etc., small-diameter air holes can be formed in the plug by one-piece molding methods such as injection molding and molding, that is, it is conducive to the manufacture of small-diameter air holes.

[0080] For example, the size of the vent hole 62 in a direction perpendicular to the central axis 60S (eg Fig. 10B The diameter of the central circle 62) can be related to the volume of the chamber 30. For example, the size of the vent hole 62 in a direction perpendicular to the central axis 60S (e.g. Fig. 10BThe diameter of the middle circle 62 can be increased as the volume of the chamber 30 increases. When the volume of the chamber 30 is large, the size of the vent hole 62 in the direction perpendicular to the central axis 60S can be designed to be larger; when the volume of the chamber 30 is small, the size of the vent hole 62 in the direction perpendicular to the central axis 60S can be designed to be smaller.

[0081] Furthermore, the dimension of the vent hole 62 along the central axis 60S (i.e., the length) is equal to the dimension of the vent hole 62 in a direction perpendicular to the central axis 60S (i.e., the width). Fig. 10B Optionally, the size of the vent hole 62 along the central axis 60S (i.e., the length) and the size of the vent hole 62 in a direction perpendicular to the central axis 60S (i.e., the diameter of the central circle 62) are related. Fig. 10B The diameter of the middle circle 62 can be designed so that the air flow velocity through the air vent 62 meets the design value requirement, for example, the air flow velocity is less than a predetermined velocity threshold. For example, the size (i.e., length) of the air vent 62 along the central axis 60S can be increased along with the size (e.g., length) of the air vent 62 in a direction perpendicular to the central axis 60S. Fig. 10B When the size of the air hole 62 in the direction perpendicular to the central axis 60S is small, the air hole 62 can be designed to be shorter; when the size of the air hole 62 in the direction perpendicular to the central axis 60S is large, the air hole 62 can be designed to be longer. In this way, the flow rate of the air flow through the air hole 62 can meet the requirements of the design value, that is, the flow rate of the air flow through the air hole 62 will not be too fast, thereby avoiding the generation of abnormal sound.

[0082] Optionally, the size of the neck 612 in the direction along the central axis 60S is substantially equal to the size of the second through hole 702 in the direction along the central axis 70S, and the size of the head 611 in the direction along the central axis 60S is substantially equal to the size of the first through hole 701 in the direction along the central axis 70S. In this way, the head and neck of the plug 60 can be accommodated in the first through hole and the second through hole, respectively.

[0083] In the embodiment of the present disclosure, the number of the plug 60 may be 1, and accordingly, the number of the through hole 70 may also be 1. Since the structures of the plug and the through hole will affect the sound characteristics of the speaker, only one plug and one through hole are provided, which is conducive to designing the structures of the plug and the through hole, so as not to affect the design characteristics of the speaker as much as possible.

[0084] It should be noted that in the illustrated embodiment, the air hole is shown as a straight hole, and accordingly, the central axis of the air hole is shown as a straight line. However, the embodiments of the present disclosure are not limited to this. In other embodiments, the air hole can be in the form of a curved hole or a bent hole, and accordingly, the central axis of the air hole is a curve or a broken line.

[0085] It should be noted that, in the above embodiments, the technical concept of the present invention is described in detail by taking the example that the orthographic projections of the through holes, air holes and the plug body in the direction perpendicular to the central axis are circular. However, the embodiments of the present invention are not limited to this. In other embodiments, the orthographic projections of the through holes, air holes and the plug body in the direction perpendicular to the central axis may be other shapes, such as rectangles, squares, hexagons, etc.

[0086] The embodiment of the present disclosure also provides a display device, such as Fig.11 As shown, the display device includes a display panel 100 and the speaker 200 provided in the above embodiment. For example, the display device may be a display device such as a television. Of course, the embodiments of the present disclosure are not limited thereto. For example, the display device may be any product or component having a display function, such as a smart phone, a tablet computer, a display, a car display, etc.

[0087] The embodiment of the present disclosure also provides a method for testing the sealed speaker provided in the embodiment of the present disclosure. Fig.12 As shown, the testing method may include steps S121 to S123.

[0088] In step S121, before the plug 60 is inserted into the through hole 70, air is inflated into the chamber 30 through the through hole 70. In this way, since the through hole 70 has a larger diameter, the inflation step can be completed quickly.

[0089] In step S122, the air tightness test is performed on the speaker box. For example, the air tightness test may include: blocking the through hole 70; and then using an instrument to detect or observe whether there is air leakage in the inflated chamber 30.

[0090] In step S123 , after the airtightness test is completed, at least a portion of the plug 60 is inserted into the through hole 70 .

[0091] Therefore, in the embodiment of the present disclosure, inflation can be performed when the plug 60 is not inserted into the through hole 70. Since the through hole 70 has a relatively large aperture, the gas can be quickly filled into the chamber 30, so that the airtightness test can be quickly completed.

[0092] Although some embodiments of the overall technical concept of the present disclosure have been shown and described, those skilled in the art will appreciate that changes may be made to these embodiments without departing from the principles and spirit of the overall technical concept of the present disclosure, and the scope of the present disclosure is defined by the claims and their equivalents.

Claims

1. A closed speaker, comprising: Box; a chamber, wherein the chamber is surrounded by the box body; a through hole, the through hole passing through the box body and communicating with the chamber, the through hole comprising a first through hole and a second through hole, the size of the first through hole in a direction perpendicular to the central axis being greater than the size of the second through hole in a direction perpendicular to the central axis; and A plug, at least a portion of which is inserted into the through hole, the plug body comprising a head, a neck and a tail, the neck being located between the head and the tail in the direction along the central axis, the hole wall of the first through hole being in contact with the outer surface of the head, and the hole wall of the second through hole being in contact with the outer surface of the neck; the head of the plug comprising a first step surface facing the neck, the box comprising a protrusion, the protrusion comprising a first surface facing the head, the first step surface being in contact with the first surface; the tapered portion of the plug comprising a second step surface facing the neck, the protrusion comprising a second surface facing the tail, the second step surface being in contact with the second surface; Wherein, the plug includes a plug body and an air vent running through the plug body, and the air vent connects the chamber with the external space of the box; the plug includes a central axis extending along the length direction of the plug body, and the size of the air vent in a direction perpendicular to the central axis is less than or equal to 1 / 10 of the size of the through hole in a direction perpendicular to the central axis.

2. The closed speaker according to claim 1, wherein: The size of the air vent in a direction perpendicular to the central axis is associated with the volume of the chamber.

3. The closed speaker according to claim 2, wherein: The size of the air vent in a direction along the central axis is associated with the size of the air vent in a direction perpendicular to the central axis.

4. The closed speaker according to any one of claims 1 to 3, wherein: A dimension of the neck in a direction perpendicular to the central axis is smaller than a dimension of the head in a direction perpendicular to the central axis.

5. The closed speaker according to claim 4, wherein: The air vent runs through the head, the neck and the tail in the direction along the central axis.

6. The closed speaker according to claim 5, wherein: The tail portion includes a tapered portion and a cylindrical portion, the tapered portion is closer to the neck portion than the cylindrical portion, and a dimension of the tapered portion in a direction perpendicular to the central axis gradually decreases from the neck portion toward the cylindrical portion.

7. The closed speaker according to claim 6, wherein: A portion of the tapered portion close to the neck has a first dimension in a direction perpendicular to the central axis, and a dimension of the neck in the direction perpendicular to the central axis is smaller than the first dimension of the tapered portion.

8. The closed speaker according to any one of claims 1-3 and 5-7, wherein: The plug body is made of elastic material.

9. The closed speaker according to any one of claims 6-7, wherein: The tail portion is located within the chamber.

10. The closed speaker according to claim 9, wherein: The size of the neck in the direction along the central axis is equal to the size of the second through hole in the direction along the central axis, and the size of the head in the direction along the central axis is equal to the size of the first through hole in the direction along the central axis.

11. The closed speaker according to any one of claims 1-3 and 5-7, wherein: The orthographic projection of any one of the through hole, the plug body and the vent hole in a direction perpendicular to the central axis is a circle.

12. The closed speaker according to any one of claims 1-3 and 5-7, wherein: The sealed speaker includes only 1 of the plugs.

13. A display device, characterized in that: The display device comprises the closed sound box according to any one of claims 1 to 10.

14. A method for testing a closed speaker according to claim 1, comprising: Before the plug is inserted into the through hole, inflating the chamber through the through hole; Performing air tightness test on the speaker; as well as After the airtightness test is completed, at least a portion of the plug is inserted into the through hole.

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