Sound production apparatus and electronic device

Abstract

The present application relates to the technical field of loudspeakers, and discloses a sound production apparatus and an electronic device. The sound production apparatus is applied to an electronic device, and comprises a loudspeaker body, a plate, and a filter screen. The plate is provided with a sound outlet. The sound outlet is located between a first plate portion and a second plate portion of the plate. The first plate portion is located on a sound outlet side of the loudspeaker body. The first plate portion has a first plate surface facing the loudspeaker body. The second plate portion is arranged at an interval on the side which a first reference plane where the first plate surface of the first plate portion is located faces, and on the side which a second reference plane where a side surface of the first plate portion is located faces. The filter screen extends from the second plate portion to the first plate portion to cover the sound outlet. A first end of the filter screen is fixed to the plate surface of the second plate portion facing the first reference plane, and / or a second end of the filter screen is fixed to the plate surface of the first plate portion facing away from the loudspeaker body. The sound production performance of the sound production apparatus can be improved.

Description

Sound production device and electronic device TECHNICAL FIELD

[0001] The present application belongs to the technical field of loudspeakers, and particularly relates to a sound production device and an electronic device. BACKGROUND

[0002] The sound production device is an audio output device of the electronic device, and the sound output effect of the sound production device directly affects the product performance of the electronic device. In the sound production device of the traditional scheme, the sound signal generated by the loudspeaker body is output to the outside of the electronic device through the sound outlet hole of the electronic device. A filter screen is arranged in the sound transmission path to play a filtering role.

[0003] In order to reduce the space occupied by the filter screen in the thickness direction of the electronic device, a fixed scheme of fixing the filter screen relative to the thickness direction of the electronic device is often adopted. This fixed scheme deteriorates the sound production performance of the sound production device.

[0004] SUMMARY

[0005] The embodiments of the present application provide a sound production device and an electronic device, which can shorten the distance from the loudspeaker body to the sound outlet hole of the electronic device, thereby optimizing the sound production performance of the sound production device.

[0006] To achieve the above object, the embodiments of the present application adopt the following technical scheme:

[0007] In a first aspect, the embodiments of the present application provide a sound production device. The sound production device comprises a loudspeaker body, a plate body, and a filter screen. The loudspeaker body is configured to generate a sound signal. The plate body is provided with a sound outlet hole, and the sound outlet hole is configured to transmit the sound signal to the outside of the electronic device through a sound outlet hole on the frame (such as a first frame) of the electronic device (the frame segment where the sound outlet hole is located on the frame is referred to as an opening segment in the embodiments of the present application). The first plate portion has a first plate surface facing the loudspeaker body; the second plate portion is arranged on one side of the first plate surface of the first plate portion facing the first reference surface and on one side of the side surface of the first plate portion facing the second reference surface. The first plate surface and the side surface of the first plate portion intersect. The filter screen extends from the second plate portion to the first plate portion to cover the sound outlet hole. The first end of the filter screen is fixed to the plate surface of the second plate portion facing the first reference surface, and / or the second end of the filter screen is fixed to the plate surface of the first plate portion facing away from the loudspeaker body.

[0008] The second plate portion is arranged at one side of the first plate portion facing the first reference surface and at one side of the first plate portion facing the second reference surface, and the second plate portion is arranged at the oblique side of the first plate portion. In this way, the sound outlet between the first plate portion and the second plate portion is inclined relative to the thickness direction of the first plate portion. In this case, the filter screen extending from the second plate portion to the first plate portion to cover the sound outlet is also inclined relative to the thickness direction of the first plate portion, so that the thickness of the sound production device can be reduced. In the case where the sound production device is assembled into the electronic device, the electronic device can be thinned.

[0009] It should be noted that, in the case where the sound production device is assembled into the electronic device, the sound hole on the opening section is located at the side of the second plate portion away from the second reference surface. In the above embodiment, because the filter screen is inclined relative to the thickness direction of the first plate portion, the distance from the loudspeaker body to the opening section of the frame is far, so that the distance from the loudspeaker body to the sound hole of the electronic device is far.

[0010] Compared with the fixing scheme that the first end of the filter screen is fixed to the plate surface of the second plate portion away from the first reference surface and the second end of the filter screen is fixed to the plate surface of the first plate portion facing the loudspeaker body, the filter screen in the sound production device adopts the following fixing scheme: the first end of the filter screen is fixed to the plate surface of the second plate portion facing the first reference surface, and / or the second end of the filter screen is fixed to the plate surface of the first plate portion away from the loudspeaker body. The fixing scheme of the filter screen can move the filter screen in the thickness direction of the first plate portion to the direction away from the loudspeaker body, so as to leave space to avoid the movement of the loudspeaker body in the direction perpendicular to the thickness direction. In this way, in the case where the sound production device is assembled into the electronic device, the loudspeaker body can be moved in the direction perpendicular to the thickness direction to a position closer to the opening section of the frame of the electronic device, so as to shorten the distance from the loudspeaker body to the opening section of the frame. It can be understood that, as the distance from the loudspeaker body to the opening section of the frame is shortened, the distance from the loudspeaker body to the sound hole is also shortened, so that the performance of the loudspeaker body such as airflow speed and frequency response can be optimized, and the sound production performance of the sound production device is further optimized.

[0011] In some embodiments of the first aspect, the first plate portion further has a second plate surface away from the loudspeaker body; the second plate portion has a first plate surface away from the first reference surface and a second plate surface facing the first reference surface. The first end of the filter screen is fixed to the second plate surface of the second plate portion, and the second end of the filter screen is fixed to the first plate surface of the first plate portion; or, the first end of the filter screen is fixed to the first plate surface of the second plate portion, and the second end of the filter screen is fixed to the second plate surface of the first plate portion.

[0012] The embodiment refines the technical solution of the first end of the filter screen being fixed to the plate surface of the second plate portion facing the first reference surface or the second end of the filter screen being fixed to the plate surface of the first plate portion facing away from the loudspeaker main body in the previous embodiment, and provides two fixing solutions of the filter screen, i.e., the first end of the filter screen is fixed to the second plate surface of the second plate portion, the second end of the filter screen is fixed to the first plate surface of the first plate portion, the first end of the filter screen is fixed to the first plate surface of the second plate portion, and the second end of the filter screen is fixed to the second plate surface of the first plate portion. Through the two fixing solutions, the fixing position of the unfixed end of the filter screen in the above technical solution is illustrated. The first fixing solution further limits that the second end of the filter screen is fixed to the first plate surface of the first plate portion, and the second fixing solution further limits that the first end of the filter screen is fixed to the first plate surface of the second plate portion.

[0013] Compared with the solution that the first end of the filter screen is fixed to the first plate surface of the second plate portion and the second end of the filter screen is fixed to the first plate surface of the first plate portion, in the first fixing solution, the first end of the filter screen moves away from the loudspeaker main body in the thickness direction of the first plate portion, and in the second fixing solution, the second end of the filter screen moves away from the loudspeaker main body in the thickness direction of the first plate portion. Obviously, both the two fixing solutions can leave more space for the loudspeaker main body in the thickness direction of the first plate portion. In this case, the loudspeaker main body can move to a position closer to the opening section of the frame of the electronic device in a direction perpendicular to the thickness direction, so as to shorten the distance between the loudspeaker main body and the opening section of the frame, thereby optimizing the airflow speed and frequency response of the loudspeaker main body, and further optimizing the sound performance of the sound generating device.

[0014] In some embodiments of the first aspect, the projection of the filter screen and the loudspeaker main body in the thickness direction of the loudspeaker main body has an overlapping area. The embodiment provides a representation of the distance between the loudspeaker main body and the opening section of the frame: in this case, the distance between the loudspeaker main body and the opening section no longer spans the entire filter screen, and based on this, even if the fixing solution of the filter screen increases the span of the filter screen, the distance between the loudspeaker main body and the opening section is shortened because the span of the entire filter screen no longer needs to be considered.

[0015] In some embodiments of the first aspect, the first plate portion has a front cavity plate portion. The front cavity plate portion is arranged opposite to and spaced from the loudspeaker main body to construct a front sound cavity of the loudspeaker main body between the loudspeaker main body and the front cavity plate portion.

[0016] In the related art, the area opposite to the loudspeaker body of the first plate part is a hole for the loudspeaker body to extend into the hole and the structure (such as a display screen) on the side of the first plate part away from the loudspeaker body to construct a front sound cavity. On the one hand, to avoid the loudspeaker body colliding with the edge area of the hole of the first plate part during vibration and to ensure that the sound signal is output through the filter screen, the loudspeaker body needs to keep a space away from the edge area of the hole, and the existence of the space makes the distance from the loudspeaker body to the opening section of the frame larger. On the other hand, because the loudspeaker body extends into the hole, the loudspeaker body needs to cross the filter screen to the sound hole, and therefore, the distance from the loudspeaker body to the frame needs to consider the span of the filter screen in the direction from the loudspeaker body to the sound hole. The fixed scheme of the above-mentioned filter screen inclined in the thickness direction relative to the first plate part makes the span of the filter screen larger, which makes the distance from the loudspeaker body to the opening section of the frame further larger.

[0017] In this embodiment, the position opposite to the loudspeaker body of the first plate part is a front cavity plate part arranged in a spaced manner, instead of a hole. It can be understood that, in the case that the front cavity plate part is a structure for constructing a front sound cavity of the loudspeaker body, on the one hand, the loudspeaker body does not need to pass through the hole, and naturally does not need to avoid the edge area of the hole, so that the distance from the loudspeaker body to the opening section of the frame can be shortened. On the other hand, because there is no hole, there is no blockage of the edge area of the hole, plus the space benefit brought by the change of the fixed position of the filter screen, so that the loudspeaker body can be moved to a position closer to the opening section of the frame of the electronic device in the direction perpendicular to the thickness direction, to shorten the distance from the loudspeaker body to the opening section of the frame.

[0018] In some embodiments of the first aspect, the plate body further comprises an annular table. The annular table is connected to the first plate part and forms a groove with the first plate part; the groove opening is towards the loudspeaker body to at least form a front sound cavity of the loudspeaker body with the loudspeaker body; and the sound outlet communicates with the front sound cavity. Part of the ring segment of the annular table forms the second plate part.

[0019] This embodiment provides an implementation of the second plate part realized by part of the ring segment of the annular table. It can be understood that the annular table forming the groove with the groove opening towards the loudspeaker body is naturally located on the side towards the first reference surface, and has the condition of forming the second plate part, so that part of the ring segment of the annular table can be used to form the second plate part, and in this case, the part of the ring segment forming the second plate part has the structural characteristics of the second plate part. In this embodiment, the part of the ring segment of the annular table is reused to form the second plate part, so that the second plate part can no longer be additionally arranged, thereby simplifying the structural design.

[0020] In some embodiments of the first aspect, the plate body further comprises an inclined part. The inclined part is inclined from the first plate part to the side towards the first reference surface; part of the ring segment is connected to the first plate part through the inclined part to construct the groove; and the sound outlet is arranged in the inclined part to communicate with the front sound cavity.

[0021] The embodiment provides a specific implementation of the sound outlet. In the embodiment, part of the ring segment is connected to the first plate portion through the inclined portion, and part of the ring segment forms the second plate portion, that is, the second plate portion is connected to the first plate portion through the inclined portion. The sound outlet formed in the inclined portion is naturally located between the second plate portion and the first plate portion. In addition, because the inclined portion is inclined from the side of the first plate portion to the first reference surface, the sound outlet formed in the inclined portion is inclined relative to the thickness direction of the first plate portion, so that the thickness of the sound production device can be reduced. In the case of applying the sound production device to the electronic device, the thickness of the electronic device can be reduced.

[0022] It can be understood that, in the embodiment, because part of the ring segment is connected to the first plate portion through the inclined portion to form the groove, it indicates that the inclined portion is part of the groove. Therefore, the sound outlet formed in the inclined portion is naturally formed in the groove forming the front sound cavity, so that the front sound cavity can be communicated.

[0023] In some embodiments of the first aspect, the annular table has an annular table surface facing away from the first reference surface; the annular table surface corresponds to the area of the part of the ring segment, and forms a plate surface of the second plate portion facing away from the first reference surface; the annular table surface is provided with a ring of sealing members. The sound production device further comprises a front cavity structure; one end of the front cavity structure is fixed to the annular table surface through the sealing members, and the other end of the front cavity structure is fixed to the loudspeaker body to form a front sound cavity of the loudspeaker body together with the groove and the loudspeaker body.

[0024] It can be understood that the annular table surface is located at the edge of the groove, and therefore one end of the front cavity structure is fixed to one side of the annular table surface, and the other end of the front cavity structure is fixed to the loudspeaker body to form a front sound cavity of the loudspeaker body together with the groove and the loudspeaker body.

[0025] It should be noted that there can be a gap between one end of the front cavity structure and the annular table surface, so that the sound signal of the loudspeaker body in the front sound cavity is transmitted to the outside of the front sound cavity along the gap. In the embodiment, one end of the front cavity structure is fixed to the annular table surface through the sealing members, which can block the channel of the front sound cavity connected to the outside of the front sound cavity through the gap between the annular table surface and the bonding portion, thereby improving the sealing performance of the front sound cavity.

[0026] In the related art, the fixing of the first end of the filter screen and the sealing of the front sound cavity of the loudspeaker body are both achieved by glue. Specifically, the first end of the filter screen is embedded in the glue and fixed on a slope with a larger inclination angle (the angle between the slope and the thickness direction of the middle plate) by the glue; the front cavity structure of the loudspeaker body is also fixed on the slope by the glue that fixes the filter screen, thereby sealing the front sound cavity. This binding scheme of achieving both the sealing of the front sound cavity and the fixing of the filter screen by the glue has the following problems: because the filter screen adopts a fixing scheme that is inclined relative to the thickness direction of the first plate part, the first end of the filter screen is fixed on the slope with a larger inclination angle by the glue, which makes the front cavity structure that is also fixed by the glue need to be fixed on the slope with a larger inclination angle. However, the scheme of fixing the front cavity structure on the slope with a larger inclination angle by the glue has poor sealing performance of the glue due to the influence of the force direction perpendicular to the slope, and it is difficult to achieve X8 level sealing of the front sound cavity, and the sealing process is complex. Further, in order to improve the sealing performance, screws are used for compression, which occupies a lot of space of the whole machine.

[0027] In this embodiment, in the case that the first end of the filter screen is fixed with the plate face of the second plate part facing the first reference plane, the sealing member for sealing the front sound cavity is fixed on the annular table face of the annular table facing away from the first plate part. Since the annular table face forms the plate face of the second plate part facing away from the first reference plane in the area corresponding to the partial ring segment, the sealing member is equivalent to being fixed on the plate face of the second plate part facing away from the first reference plane. Obviously, in this embodiment, the fixing of the filter screen and the sealing of the front sound cavity are decoupled. In the case of decoupling, the sealing of the front sound cavity is not affected by the fixing of the filter screen, and it is easier to achieve X8 level sealing of the front sound cavity. Further, in the case that the area of the annular table face corresponding to the partial ring segment extends along the extension direction of the first reference plane or extends approximately along the extension direction of the first reference plane (i.e., the extension direction of the annular table face and the extension direction of the first reference plane form a smaller angle, such as less than 15°), the area of the annular table face corresponding to the partial ring segment is no longer a slope with a larger inclination angle relative to the thickness direction of the first plate part, and thus the sealing member has a larger force in the direction perpendicular to the area of the annular table face corresponding to the partial ring segment, so that the sealing performance of the sealing member is better, and X8 level sealing of the front sound cavity is achieved. Moreover, the sealing process of this embodiment is simpler, and there is no need for additional compression by screws, thereby saving the space of the whole machine.

[0028] In some embodiments of the first aspect, the front cavity structure includes a carrier. One end of the carrier extends to one side of the annular table face to form one end of the front cavity structure; the other end of the carrier extends to the sound outlet side of the loudspeaker body to carry the loudspeaker body, and the other end of the carrier forms the other end of the front cavity structure.

[0029] The embodiment takes the carrier frame carrying the loudspeaker body as an example to illustrate the specific implementation of the front cavity structure, the groove, and the loudspeaker body constructing the front sound cavity. It can be understood that one end of the carrier frame extends to one side of the annular table, and there can be a gap between the carrier frame and the annular table, so that the sound signal of the loudspeaker body in the front sound cavity is transmitted to the outside of the front sound cavity along the gap. In the embodiment, one end of the carrier frame is fixed to the annular table by a sealing element, which can block the channel of the front sound cavity through the gap between the annular table and the bonding part to the outside of the front sound cavity, thereby improving the sealing performance of the front sound cavity.

[0030] In some embodiments of the first aspect, in the case where the second plate part of the second plate part is fixed to the plate face of the first reference face, the first end of the filter screen is fixed to the area of the corresponding ring segment of the annular table by a sealing element.

[0031] It can be understood that, in the case where the second plate part is implemented by the partial ring segment of the annular table, the plate face of the second plate part facing away from the first reference face is the area of the corresponding ring segment of the annular table, and the sealing element is arranged on the annular table. Therefore, in the case where the second plate part of the second plate part is fixed to the plate face of the first plate part, the first end of the filter screen can reuse the sealing element to fix the plate face of the second plate part facing away from the first plate part, such as embedding the first end of the filter screen in the sealing element, and the like. In this case, the fixing of the first end of the filter screen and the sealing of the front sound cavity are bound together, and no additional space is occupied in the direction perpendicular to the thickness direction of the first plate part, so as not to increase the distance from the loudspeaker body to the opening segment of the frame.

[0032] In addition, it needs to be noted that although the fixing of the first end of the filter screen and the sealing of the front sound cavity are bound together, in the case where the area of the corresponding ring segment of the annular table extends along the extension direction of the first reference face or extends approximately along the extension direction of the first reference face, the sealing element is subjected to a greater force in the direction perpendicular to the area of the corresponding ring segment of the annular table, so that the sealing performance of the sealing element is better.

[0033] In some embodiments of the first aspect, the plate body is further provided with a mounting hole. The second plate part has a second plate face facing the first reference face; and the mounting hole is located on one side of the second plate face of the second plate part. The first end of the filter screen is fixed to the second plate face of the second plate part and opposite to the mounting hole.

[0034] In the case where the first end of the filter screen is fixed to the second plate face of the second plate part, in order to facilitate the fixing of the first end of the filter screen to the second plate face of the second plate part, the embodiment is provided with a mounting hole on one side of the second plate face of the second plate part. Since the first end of the filter screen is opposite to the mounting hole, that is, opposite to the second plate face of the second plate part. In this way, the first end of the filter screen can be fixed to the plate face of the second plate part facing the first reference face through the mounting hole, so as to facilitate the installation of the filter screen.

[0035] In a second aspect, the embodiments of the present application provide an electronic device. The electronic device comprises a display screen and the sound production apparatus as mentioned in any of the embodiments of the first aspect. Wherein the side of the display screen is fixed with a frame, and the frame is provided with a sound outlet hole. The first plate part in the sound production apparatus has a second plate surface facing away from the loudspeaker main body; the back of the display screen faces the second plate surface of the first plate part; and the sound outlet hole is located on the side of the second plate part facing away from the second reference surface and communicates with the sound outlet.

[0036] It can be understood that the beneficial effects of the electronic device provided by the embodiments of the second aspect can refer to the related description of the sound production apparatus in the first aspect, which will not be repeated here.

[0037] In some embodiments of the second aspect, the back of the display screen comprises a component boundary area, and the component boundary area extends from the COP bending part of the display screen to the flexible circuit board of the display screen. Obviously, the component boundary area includes the boundary position of the COP bending part and the flexible circuit board of the display screen. The front cavity plate part of the first plate part is opposite to the component boundary area, and is naturally opposite to the boundary position of the COP bending part and the flexible circuit board of the display screen.

[0038] It should be noted that the loudspeaker main body is opposite to the component boundary area of the display screen. The COP bending part and the flexible circuit board have a step difference, so that the boundary position of the COP bending part and the flexible circuit board of the display screen is prone to have a gap. In the related art, the front sound cavity of the loudspeaker main body is constructed by the component boundary area of the display screen, and it is difficult to realize the X8 level sealing of the front sound cavity of the loudspeaker main body at the boundary position of the component boundary area.

[0039] In this embodiment, the front cavity plate part opposite to the component boundary area of the display screen is arranged between the display screen and the loudspeaker main body, so as to replace the component boundary area of the display screen to construct the front sound cavity of the loudspeaker main body between the front cavity plate part and the loudspeaker main body. In this case, the component boundary area of the display screen is no longer used to construct the front sound cavity of the loudspeaker main body. It can be understood that the front cavity plate part is an integral structure and does not have the aforementioned step difference, so that it is easier to realize the X8 level sealing of the front sound cavity of the loudspeaker main body when the front cavity plate part is used to construct the front sound cavity of the loudspeaker main body.

[0040] In some embodiments of the second aspect, the plate body of the sound production apparatus is used as a middle plate (e.g., the first middle plate) of the electronic device. The middle plate is located at the back side of the display screen to carry the display screen, and the middle plate fixes the frame. In this embodiment, when the plate body is used as the middle plate of the electronic device, the thickness of the sound production apparatus can be reduced, thereby thinning the electronic device. It should be noted that when the plate body of the sound production apparatus is a structure for constructing the front sound cavity of the loudspeaker main body, this embodiment is equivalent to multiplexing the middle plate to construct the front sound cavity of the loudspeaker main body. In this case, the constructed front sound cavity of the loudspeaker main body is an open sound cavity. This embodiment provides an embodiment of the fixing scheme of the above-mentioned filter screen applied to the scenario of the open front cavity. Of course, in other embodiments, the front sound cavity constructed by the plate body can also be a closed front cavity.

[0041] In some embodiments of the second aspect, the sound production apparatus further comprises a frame (e.g., the first frame); an inner surface of the frame fixes a side surface of the middle plate; and the plate surface of the middle plate intersects with the side surface. It can be understood that, generally speaking, the middle plate and the frame are integrally formed. Based on this, when the plate body is used as the middle plate, the middle plate is generally integrally connected with the frame. This embodiment provides a sound production apparatus comprising a frame.

[0042] In some embodiments of the second aspect, the second plate surface of the first plate portion carries the display screen; the middle plate further has an inner screen bonding portion; the inner screen bonding portion is distributed on the side surface side of the first plate portion and is bonded to the area of the display screen distributed on the side surface side of the first plate portion. On the side toward the second reference surface, the inner screen bonding portion is provided with a notch. The notch is farther away from the second reference surface than the second plate portion and the loudspeaker main body; and the notch faces the first plate portion.

[0043] In this embodiment, on the side toward the second reference surface, the inner screen bonding portion is provided with a notch, which indicates that the notch is located on the side toward the second reference surface. It can be understood that the notch is located on the side toward the second reference surface and faces the first plate portion, and the first plate portion is located on the side toward the notch. In addition, in the extension direction of the first reference surface, because the notch is farther away from the second reference surface than the second plate portion and the loudspeaker main body, it indicates that the second plate portion and the loudspeaker main body are also located on the side toward the notch. It can be understood that the first plate portion, the second plate portion and the loudspeaker main body located on the side toward the notch can move together toward the notch, thereby being closer to the sound outlet hole. It can be understood that the loudspeaker main body being closer to the sound outlet hole can further shorten the distance between the loudspeaker main body and the hole section of the frame.

[0044] In some embodiments of the second aspect, the sound production apparatus further comprises a rear cavity structure; the rear cavity structure comprises a back cover of the electronic device. The loudspeaker main body is located on the side of the second plate portion away from the first reference surface.

[0045] It should be noted that the rear cavity structure is a structure for constructing a rear sound cavity of the electronic device. The rear cavity structure includes a structure serving as a back cover of the electronic device, that is, the back cover of the electronic device is reused as a structure for constructing a rear sound cavity of the electronic device. In this case, the rear sound cavity of the constructed loudspeaker body is an open rear cavity. The embodiment provides an embodiment of the fixing scheme of the filter screen described above applied to the scenario of the open rear cavity.

[0046] In the embodiment, on the one hand, the sound generating device reuses the back cover to construct the rear sound cavity of the loudspeaker body, which can reduce the thickness of the sound generating device. In the case where the sound generating device is applied to the electronic device, the electronic device can be thinned. On the other hand, in the case of the same thickness size, compared with the closed rear cavity, the open rear cavity constructed by reusing the back cover has a larger volume, and therefore, the loudspeaker body can move in the thickness direction to the side close to the back cover to pass the second plate part. In this case, the second plate part does not hinder the movement of the loudspeaker body to the opening section of the frame, and the loudspeaker body can further move to the opening section of the frame, thereby further shortening the distance between the loudspeaker body and the opening section of the frame. As a manifestation of the distance between the loudspeaker body and the opening section of the frame being shortened, the loudspeaker body is located on the side of the second plate part away from the first reference surface, that is, the loudspeaker body moves to the side of the second plate part away from the first reference surface.

[0047] In addition, it should be noted that the side of the loudspeaker body away from the opening section is the battery. In the case where the loudspeaker body moves to the opening section, more space can be left for the battery. In this case, the battery can use the space to increase the volume, thereby increasing the battery capacity of the battery itself, and further improving the standby time of the electronic device. It can be seen that the embodiment provides a use scenario of the open rear cavity. Of course, in some other embodiments, the rear sound cavity constructed by the rear cavity structure can also be a closed rear cavity. BRIEF DESCRIPTION OF DRAWINGS

[0048] FIG. 1 is a structural schematic diagram of an electronic device provided by an embodiment of the present application;

[0049] FIG. 2 is a structural exploded schematic diagram of the electronic device shown in FIG. 1;

[0050] FIG. 3 is a partial structural exploded schematic diagram of the electronic device shown in FIG. 1;

[0051] FIG. 4 is a partial structural schematic diagram of a sound generating device in a conventional technology;

[0052] FIG. 5 is a partial structural schematic diagram of a sound generating device in another conventional technology;

[0053] FIG. 6 is a partial structural schematic diagram of a sound generating device provided by an embodiment of the present application;

[0054] Fig. 7 is a structural exploded view of the sound production device shown in Fig. 6 along the Z-axis direction;

[0055] Fig. 8 is a structural exploded view of the loudspeaker shown in Fig. 7 along the Z-axis direction;

[0056] Fig. 9 is a structural view of the loudspeaker shown in Fig. 7 along the section line B-B;

[0057] Fig. 10 is a structural view of the first middle frame in Fig. 6 along a first perspective;

[0058] Fig. 11 is a structural view of the sound production device shown in Fig. 6 along the section line C-C;

[0059] Fig. 12 is an enlarged view of the region E2 shown in Fig. 11;

[0060] Fig. 13 is a structural view of the first middle frame in Fig. 6 along a second perspective;

[0061] Fig. 14 is a schematic view of the filter mesh covering the sound outlet on the first middle plate;

[0062] Fig. 15 is a schematic view of the airflow simulation and frequency response simulation of the sound production device shown in Fig. 12;

[0063] Fig. 16 is a structural view of the sound production device shown in Fig. 6 along the section line C-C;

[0064] Fig. 17 is a structural exploded view of the first middle frame and the loudspeaker body in Fig. 6;

[0065] Fig. 18 is a view of the relative position relationship between the loudspeaker body and the back of the first display area according to an embodiment of the present application;

[0066] Fig. 19 is an enlarged view of the region E2 in Fig. 11;

[0067] Fig. 20 is a schematic view of the position of the sealing member according to an embodiment of the present application;

[0068] Fig. 21 is a schematic view of the cross section of the sound production device shown in Fig. 6 fixing the first display area;

[0069] Fig. 22 is a schematic view of the position of the inner screen bonding portion and the notch in Fig. 21 along another perspective;

[0070] Fig. 23 is a schematic view of the cross section of a sound production device with an open back cavity according to an embodiment of the present application.

[0071] In the drawings, various reference numerals are used to refer to the same or similar parts throughout the several views of the drawings.

[0072] 00 - electronic device; 01 - foldable display screen; 011 - first display area; 0110 - component demarcation area; 011a - COP bending part; 011b - flexible circuit board; 012 - second display area; 013 - third display area; 02 - housing assembly; 021 - first housing; 022 - second housing; 023 - rotating shaft mechanism; 03 - A housing;

[0073] 10 - sound production device;

[0074] 100 - first middle frame; 110 - first middle plate; 110a - hole; 110b - sink; 110b1 - opening sidewall; 110c - recess; 110d - sound outlet; 111 - first plate part; 1111 - front cavity plate body; 112 - annular table; 112a - annular table surface; 1121 - second plate part; 113 - inclined part; 114 - inner screen bonding part; 114a - notch; 120 - first bezel; 121 - opening section; 120a - sound hole; 120b - inclined surface;

[0075] 200 - first back cover; 210 - camera decoration cover;

[0076] 300 - loudspeaker; 310 - loudspeaker body; 310a - front sound cavity; 310b - rear sound cavity; 320 - carrier frame; 320a - through hole; 321 - first fixing part; 330 - rear cavity structure; 331 - second fixing part; 350 - glue body; 360 - sealing member;

[0077] 400 - battery; 500 - key; 600 - camera module; 700 - filter screen. DETAILED DESCRIPTION

[0078] Embodiments of the present application are described in detail below with reference to examples illustrated in the accompanying drawings, in which the same or similar elements or elements having the same or similar functions are denoted by the same or similar reference numerals throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0079] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "top", "bottom", "inner", "outer", "upper", "lower", "left", "right", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0080] The terms "first", "second", "third", "fourth" and the like in the description and in the claims, if any, are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the descriptive terms "first", "second", "third", "fourth", etc. are to be interpreted, by the applicant or the skilled person, as a structural or positional description and not by rank, sequence, or order. Furthermore, the terms "comprise", "comprising", "comprises", "include", "including", and "includes" are to be construed as non-exhaustive, in that they do not exclude additional, unrecited elements or steps.

[0081] In the present application, unless specifically defined otherwise, the terms "connected", "connected to", "connected with", "connected together", "connecting", "connection", and the like are to be construed as a broad term, in that they are used to connote a relationship between or among two or more elements, and may be used in the case of a direct connection or an indirect connection, that is, a connection through one or more additional elements. In addition, the described or claimed connection between the elements may be a mechanical connection, an electrical connection, an electromagnetic connection, a magnetic connection, a logical connection, a physical connection, or an indirect connection that is made by way of one or more other intervening elements or intervening connections.

[0082] In the present application, "and / or" is merely used to represent an associated relationship between an associated object, and can represent three relationships; for example, A and / or B can represent three cases of A alone, A and B together, and B alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

[0083] It should be noted that the words "in some embodiments", "in an exemplary way", "for example" and the like in the present application are used to represent an example, illustration or description. Any embodiment or design scheme described as "in some embodiments", "in an exemplary way", "for example" in the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the words "in some embodiments", "in an exemplary way", "for example" and the like are intended to present the relevant concept in a specific way.

[0084] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and embodiments.

[0085] An electronic device is provided. The electronic device is a device with a sound emitting device serving as a sound emitting component of the electronic device, for realizing sound output functions of the electronic device, such as voice call, music playing, etc. The electronic device can be a mobile phone, a tablet computer, a laptop, a notebook computer, a personal digital assistant (PDA), a wearable device (e.g., a watch), a vehicle-mounted device, an augmented reality (AR) / virtual reality (VR) device, etc., but is not limited thereto. Hereinafter, the electronic device is taken as a foldable mobile phone for example.

[0086] Exemplarily, refer to FIG. 1 and FIG. 2, FIG. 1 is a structural schematic diagram of an electronic device provided by an embodiment of the present application. FIG. 2 is a structural exploded schematic diagram of the electronic device 00 shown in FIG. 1.

[0087] The electronic device 00 is a foldable mobile phone, which can include a housing assembly 02 and a foldable display screen 01 disposed on the housing assembly 02. The foldable display screen 01 includes a first display area 011, a second display area 012, and a third display area 013. The third display area 013 is connected between the first display area 011 and the second display area 012. Among the three display areas, at least the third display area 013 has a foldable feature.

[0088] The housing assembly 02 includes a first housing 021, a second housing 022, and a hinge mechanism 023. The hinge mechanism 023 is connected between the first housing 021 and the second housing 022, the first housing 021 carries the first display area 011, the second housing 022 carries the second display area 012, and the hinge mechanism 023 carries the third display area 013. The first housing 021 and the second housing 022 are rotationally connected through the hinge mechanism 023 to drive the foldable display screen 01 to fold or unfold, so as to switch the foldable mobile phone between a folded state and an unfolded state. FIG. 1 shows the unfolded state of the foldable mobile phone.

[0089] It can be understood that only some components included in the foldable mobile phone are shown in FIG. 1, and the actual shape, actual size, actual position, and actual structure of each component are not limited by the structure shown in the drawing. In order to facilitate the description below, an O-XYZ coordinate system is established, and the width direction of the foldable mobile phone in the folded state is defined as the X-axis direction, the length direction of the foldable mobile phone is defined as the Y-axis direction, and the thickness direction of the foldable mobile phone is defined as the Z-axis direction. It should be noted that the coordinate system of the foldable mobile phone can be flexibly set according to actual needs.

[0090] Please refer to FIG. 3, which is a partial structural exploded view of the electronic device 00 shown in FIG. 1. FIG. 3 shows the back perspective view of the electronic device 00 and further disassembles the housing assembly 02. The following description takes the first housing 021 as an example, and the second housing 022 can be adaptively understood.

[0091] The first housing 021 includes the first middle frame 100 and the first back cover 200. In other embodiments, the first back cover 200 can also not be regarded as a part of the first housing 021.

[0092] The first middle frame 100 serves as the structural "skeleton" of the electronic device 00, for mounting and fixing the components of the electronic device 00, such as the speaker 300, the battery 400, the key 500, the camera module 600, and so on. Specifically, the first middle frame 100 includes the first middle plate 110 and the first bezel 120.

[0093] The thickness direction of the first middle plate 110 can be the above-mentioned Z-axis direction, the first back cover 200, the first middle plate 110, and the first display area 011 shown in FIG. 1 are sequentially arranged in the Z-axis direction, and the first middle plate 110 is located on the side (referred to as the back side) facing the back of the first display area 011.

[0094] The first bezel 120 includes an inner surface and an outer surface arranged in opposite directions, and the outer surface of the first bezel 120 is a part of the appearance surface of the electronic device 00. The inner surface of the first bezel 120 fixes the side of the first back cover 200, the first middle plate 110, and the first display area 011. It should be noted that the first back cover 200 includes an outer surface and an inner surface arranged in opposite directions in the Z-axis direction, and the side of the first back cover 200 is distributed between the outer surface and the inner surface of the first back cover 200, such as the surface extending in the O-XZ plane and in the O-YZ plane; the first middle plate 110 includes a first plate surface and a second plate surface arranged in opposite directions in the Z-axis direction, and the side of the first middle plate 110 is distributed between the first plate surface and the second plate surface of the first middle plate 110, such as the surface extending in the O-XZ plane and in the O-YZ plane; the first display area 011 includes a display surface and a back surface arranged in opposite directions in the Z-axis direction, and the side of the first display area 011 is distributed between the display surface and the back surface of the first display area 011 arranged in opposite directions in the Z-axis direction, such as the surface extending in the O-XZ plane and in the O-YZ plane.

[0095] Optionally, the first bezel 120 can be an integral molding structure with the first middle plate 110, and the inner surface of the first bezel 120 can fix the side of the first back cover 200 and the first display area 011 through adhesive. Of course, in other embodiments, the first bezel 120 can be an integral molding structure with the first back cover 200.

[0096] The above-mentioned key 500 can be mounted on the first bezel 120. For example, the volume key 500 can be arranged on the side frame section of the first bezel 120, which refers to the frame section of the first bezel 120 extending in the Y-axis direction. In addition, in FIG. 2, one or more sound outlets 120a can also be arranged on the first bezel 120, and eight sound outlets 120a are shown in FIG. 3.

[0097] For example, the sound outlet 120a can be arranged on the bottom frame section of the first bezel 120, which refers to the frame section of the first bezel 120 extending in the X-axis direction and farther away from the camera module 600. In the embodiments of the present application, the frame section of the first bezel 120 is referred to as the opening section 121. For example, in FIG. 3, the opening section 121 is the bottom frame section. The sound outlet 120a penetrates the inner surface and the outer surface of the opening section 121 arranged back to back and distributed in the Y-axis direction, and the outer surface of the opening section 121 is the appearance surface.

[0098] The above-mentioned loudspeaker 300, battery 400, and camera module 600 can be mounted on the first middle plate 110.

[0099] Specifically, the first plate surface of the first middle plate 110 faces the first back cover 200, and the second plate surface of the first middle plate 110 faces the back surface of the first display area 011 and carries the first display area 011. The loudspeaker 300 is fixed to the first plate surface of the first middle plate 110, and the loudspeaker 300 is fixed to the position of the first middle plate 110 close to the sound outlet 120a and communicates with the sound outlet 120a on the first bezel 120, so that the sound signal output by the loudspeaker 300 can be transmitted to the outside of the electronic device 00 through the sound outlet 120a.

[0100] It can be understood that the positions of the above-mentioned sound outlet 120a and loudspeaker 300 are not limited to the schematic in FIG. 3, and in some other embodiments, the positions of the sound outlet 120a and loudspeaker 300 can be arranged on the corresponding positions of the second housing 022. The battery 400 is fixed to the side of the loudspeaker 300 away from the sound outlet 120a. The camera module 600 is fixed to the side of the battery 400 away from the loudspeaker 300 and opposite to the camera decoration cover 210 on the first back cover 200.

[0101] It should be noted that in some embodiments, the loudspeaker 300 in FIG. 3 is not sufficient to provide a complete structure capable of forming an acoustic cavity, and a peripheral structure such as the first middle frame 100 is needed to jointly enclose the acoustic cavity. The acoustic cavity in the embodiments of the present application is regarded as an open acoustic cavity, and accordingly, the front acoustic cavity is referred to as an open front cavity, and the rear acoustic cavity is referred to as an open rear cavity. In this case, the sound generating device mentioned above can be regarded as a device formed by the loudspeaker 300 and the peripheral structure (such as the first middle frame 100) and the like. For example, the first middle frame 100 and the loudspeaker 300 arranged on the first middle frame 100 in FIG. 3 can be regarded as the sound generating device 10, and the subsequent embodiments of the present application are based on this. Of course, in the specific implementation process, the sound generating device 10 can also include more or less structures, for example, the first bezel 120 of the first middle frame 100 can not be part of the sound generating device 10.

[0102] In other embodiments, the loudspeaker 300 in FIG. 3 itself has a complete structure capable of forming an acoustic cavity, and does not need to be enclosed by a peripheral structure such as the first middle frame 100 to form an acoustic cavity by itself. The acoustic cavity in the embodiments of the present application is regarded as a closed acoustic cavity, and accordingly, the front acoustic cavity is referred to as a closed front cavity, and the rear acoustic cavity is referred to as a closed rear cavity. In this case, the sound generating device mentioned above can be regarded as the loudspeaker 300 itself in FIG. 3, and of course the sound generating device can also include more structures, such as the first middle frame 100 shown in FIG. 3.

[0103] Please refer to FIG. 4, which is a partial structure schematic diagram of a sound generating device 10 in a conventional technology. FIG. 4 can be understood as a structure schematic diagram obtained by cutting the sound generating device 10 shown in FIG. 3 along the cutting line A-A. The cutting line A-A passes through the loudspeaker 300 of the sound generating device 10. In order to facilitate understanding, the first display area 011 is also shown in the figure.

[0104] The sound generating device 10 includes a loudspeaker. The loudspeaker includes a loudspeaker body 310 and a base for supporting the loudspeaker body 310, which can be implemented by the first middle frame 100 in FIG. 3. The first middle plate 110 of the first middle frame 100 is provided with a sink groove 110b for the loudspeaker to sit in. The sink groove 110b has an opening side wall 110b1 opposite the opening section 121. The opening side wall 110b1 is provided with a sound outlet 110d opposite and communicating with the sound hole 120a on the opening section 121.

[0105] The loudspeaker body 310 and the first middle plate 110 of the first middle frame 100 are distributed along the Z-axis direction. The first middle plate 110 is provided with a hole 110a opposite the position of the loudspeaker body 310, so as to communicate the loudspeaker body 310 and the first display area 011 on the side of the first middle plate 110 away from the loudspeaker body 310, thereby forming a front sound cavity 310a of the loudspeaker body 310. The front sound cavity 310a of the loudspeaker body 310 has a sound outlet channel that communicates to the sound outlet hole 120a on the opening segment 121 of the first middle frame 100 through the sound outlet 110d.

[0106] The sound generating device 10 further comprises a filter screen 700. The filter screen 700 is fixed to the inner surface of the opening side wall 110b1 to cover the sound outlet 110d, thereby playing a role of filtering dust and other impurities. Since the inner surface of the opening side wall 110b1 is distributed along the Z-axis direction or substantially along the Z-axis direction, the filter screen 700 fixed to the inner surface of the opening side wall 110b1 also extends along the Z-axis direction or substantially along the Z-axis direction, so that the filter screen 700 occupies less space in the Y-axis direction, which makes the loudspeaker body 310 closer to the opening segment 121. It should be noted that the distance between the loudspeaker body 310 and the opening segment 121 (specifically the outer surface of the opening segment 121) affects the length of the sound outlet channel. The longer the sound outlet channel, the worse the performance of the loudspeaker body 310 in terms of airflow speed and frequency response; the shorter the sound outlet channel, the better the performance of the loudspeaker body 310 in terms of airflow speed and frequency response. Therefore, the loudspeaker body 310 in FIG. 4 has better performance in terms of airflow speed and frequency response.

[0107] However, on the one hand, since the entire filter screen 700 is fixed to the inner surface of the opening side wall 110b1, it occupies a large area of the inner surface of the opening side wall 110b1, resulting in a relatively narrow sound outlet 110d; on the other hand, the inner surface of the opening side wall 110b1 extends along the Z-axis direction or substantially along the Z-axis direction, and the filter screen 700 fixed to the inner surface of the opening side wall 110b11 occupies a large space in the Z-axis direction, resulting in a large height of the opening side wall 110b1 in the Z-axis direction. Therefore, the filter screen 700 fixing scheme shown in FIG. 4 is suitable for electronic devices 00 with a large frame height (i.e., electronic devices 00 with a large thickness), and cannot be applied to electronic devices 00 with extremely thin requirements.

[0108] Please refer to FIG. 5, which is a partial structure diagram of a sound generating device 10 in another conventional technology. FIG. 5 can be understood as another structure diagram of the sound generating device 10 shown in FIG. 3 along the cutting line A-A.

[0109] Different from the embodiment shown in FIG. 4, the first end of the filter screen 700 in FIG. 5 extends towards the direction where the top end of the opening section 121 (one end of the opening section 121 away from the first display area 011 in the Z-axis direction) is located and is fixed on the inclined surface 120b, and the second end of the filter screen 700 is fixed on the hole edge area of the first plate surface of the first middle plate 110. The entire filter screen 700 is inclined relative to the Z-axis direction. In this way, the filter screen 700 occupies a smaller space in the Z-axis direction, compared with the embodiment shown in FIG. 4. Therefore, the filter screen 700 fixing scheme shown in FIG. 5 is suitable for the electronic device 00 with a smaller thickness, and can improve the narrow condition of the sound outlet 110d.

[0110] However, because the filter screen 700 is inclined relative to the Z-axis direction, the filter screen 700 occupies a larger space in the Y-axis direction, so that the loudspeaker body 310 is farther away from the opening section 121 (generally more than 7 mm), thereby deteriorating the airflow speed and frequency response performance of the loudspeaker body 310.

[0111] Based on this, the embodiment of the present application provides a sound generating device, which can be applied to the electronic device 00, such as the electronic device 00 shown in FIGS. 1 to 2. Compared with the sound generating device shown in FIG. 5, the sound generating device can shorten the distance between the loudspeaker body 310 and the opening section 121 on the premise of being applied to the electronic device 00 with a smaller thickness, thereby optimizing the airflow speed and frequency response performance of the loudspeaker body 310.

[0112] Exemplarily, refer to FIGS. 6 and 7, FIG. 6 is a partial structure schematic diagram of a sound generating device provided by an embodiment of the present application, and FIG. 7 is a structure exploded schematic diagram of the partial structure of the sound generating device shown in FIG. 6 along the Z-axis direction. It can be understood that the partial structure shown in FIG. 6 can be roughly understood as the structure corresponding to the area E1 circled by the dashed line in FIG. 3, which shows the complete loudspeaker 300 and part of the first middle frame 100. It can be understood that the complete structure of the sound generating device 10 can include the complete first middle frame 100.

[0113] The sound generating device 10 includes the loudspeaker 300 and the first middle frame 100. The positional relationship and connection relationship of the first middle plate 110 and the first side frame 120 can refer to the description of the related content in the foregoing FIG. 3. It can be seen that in this embodiment, the first side frame 120 of the first middle frame 100 belongs to the sound generating device 10. Of course, in some other embodiments, the sound generating device 10 can also not include the first side frame 120, which is not limited in the embodiments of the present application.

[0114] The loudspeaker 300 is mounted on the first middle plate 110 of the first middle frame 100. Exemplarily, the first middle plate 110 of the first middle frame 100 is provided with a sink 110b, and the loudspeaker 300 is seated in the sink 110b and flush or substantially flush with the area of the first middle plate 110 distributed around the sink 110b.

[0115] Please refer to FIG. 8 and FIG. 9, FIG. 8 is a structural exploded view of the loudspeaker 300 shown in FIG. 7 along the Z-axis direction, and FIG. 9 is a structural view of the loudspeaker 300 shown in FIG. 7 along the section line B-B.

[0116] The loudspeaker 300 includes a loudspeaker body 310, a carrier 320, and a back cavity structure 330.

[0117] The loudspeaker body 310 is used to push the air in the sound cavity to vibrate by mechanical vibration to form sound waves, thereby generating a sound signal. For example, the loudspeaker body 310 can include a diaphragm, a voice coil, etc.

[0118] The carrier 320 is used to carry the loudspeaker body 310. Exemplarily, the carrier 320 is a ring structure, and the loudspeaker body 310 extends into the inside of the ring structure of the carrier 320. As shown in FIG. 9, the carrier 320 surrounds the loudspeaker body 310, one end of the carrier 320 is fixed with the back cavity structure 330, and the other end of the carrier 320 extends to the sound emitting side of the loudspeaker body 310 to hold the loudspeaker body 310, thereby achieving the carrying of the loudspeaker body 310. It should be noted that the sound emitting side of the loudspeaker body 310 refers to the side to which the front surface of the loudspeaker body 310 faces, and the front surface of the loudspeaker body 310 is usually also called the sound generating surface, i.e., the surface where the diaphragm is located.

[0119] The back cavity structure 330 is used to construct the back sound cavity of the loudspeaker body 310. Exemplarily, as shown in FIG. 9, the back cavity structure 330 is arranged in a spaced manner with the back surface of the loudspeaker body 310, and the carrier 320 is fixed on the side of the loudspeaker body 310 facing the side surface. In this way, the back cavity structure 330, the carrier 320, and the loudspeaker body 310 form a back sound cavity 310b of the loudspeaker body 310. It should be noted that the back surface of the loudspeaker body 310 faces away from the front surface of the loudspeaker body 310 in the Z-axis direction, and the Z-axis direction is the thickness direction of the loudspeaker body 310. The side surface of the loudspeaker body 310 is the surface between the front surface and the back surface of the loudspeaker body 310, for example, the surface extending in the O-XZ plane and the surface extending in the O-YZ plane.

[0120] As can be seen from the above, in the loudspeaker 300 shown in FIG. 8, the rear sound cavity 310b of the loudspeaker body 310 is a closed rear cavity; the loudspeaker 300 does not have a complete structure sufficient to form a front sound cavity of the loudspeaker body, and the front sound cavity of the loudspeaker body 310 in FIG. 8 is an open front cavity.

[0121] In some embodiments, the first middle frame 100 in FIGS. 6 and 7 is used to construct the front sound cavity of the loudspeaker body 310, and the loudspeaker 300 and the first middle frame 100 enclose to form the front sound cavity of the loudspeaker body 310.

[0122] Exemplarily, refer to FIG. 10, which is a structural schematic diagram of the first middle frame 100 in FIG. 6 in a first perspective view.

[0123] The first middle plate 110 of the first middle frame 100 includes a first plate part 111 and an annular table 112.

[0124] The first plate part 111 can include a first plate face and a second plate face arranged back to back in the Z-axis direction, which is the thickness direction of the first plate part 111. It can be understood that the first plate face of the first plate part 111 can be the corresponding face of the first plate face of the first middle plate 110, and the second plate face of the first plate part 111 can be the corresponding face of the second plate face of the first middle plate 110. In other words, the first plate face of the first plate part 111 serves as a partial plate face of the first plate face of the first middle plate 110, and the second plate face of the first plate part 111 serves as a partial plate face of the second plate face of the first middle plate 110.

[0125] The annular table 112 is constructed as a closed annular structure. It should be noted that the annular structure can be a circular ring structure, a square ring structure, etc. The annular table 112 is connected with the first plate part 111 and encloses to form a groove 110c, which is located on the first plate face side of the first plate part 111, and the slot of the groove 110c faces away from the first plate face of the first plate part 111.

[0126] The groove 110c is used to construct the front sound cavity of the loudspeaker body. It should be noted that the groove 110c is used to construct the front sound cavity of the loudspeaker body, which means that the groove 110c serves as a structure for constructing the front sound cavity of the loudspeaker body, and can at least jointly enclose with the loudspeaker body to form the front sound cavity of the loudspeaker body. Exemplarily, the groove 110c can jointly enclose with the front cavity structure and the loudspeaker body to construct the front sound cavity of the loudspeaker body. For example, because the annular table is located at the edge of the groove, in the case that the annular table is fixed at one end of the front cavity structure and the loudspeaker body is fixed at the other end, the front cavity structure can construct the front sound cavity of the loudspeaker body together with the groove and the loudspeaker body. It should be noted that this does not emphasize that the groove 110c alone can form the front sound cavity of the loudspeaker body, and the concept of “constructing” appearing in other positions in the embodiments can refer to the explanation herein.

[0127] Exemplarily, refer to FIG. 11, which is a structural schematic diagram of the sound production device 10 shown in FIG. 6 along the cutting line C-C.

[0128] The first plate part 111 is located at the sound output side of the loudspeaker body 310, and the notch of the groove 110c at the first plate surface side of the first plate part 111 faces the loudspeaker body 310. Optionally, in FIG. 11, the loudspeaker body 310 extends into the groove 110c, so that the height of the sound production device 10 in the Z-axis direction can be reduced, thereby achieving the thinning of the electronic device. Of course, in some other embodiments, the loudspeaker body 310 can also not extend into the groove 110c.

[0129] The front cavity structure can include a carrier 320. One end of the carrier 320 (forming one end of the front cavity structure) extends to one side of the annular table surface of the annular table 112 and fixes the annular table surface of the annular table 112, and the other end of the carrier 320 (forming the other end of the front cavity structure) extends into the groove 110c (i.e., the inner side of the annular table 112) and fixes the loudspeaker body 310 at the sound output side of the loudspeaker body 310. In this case, the carrier 320, the groove 110c, and the loudspeaker body 310 jointly enclose the front sound cavity 310a of the loudspeaker body 310. It can be understood that in some other embodiments, the front cavity structure can also be implemented by other structures, for example, one end of the front cavity structure can extend to one side of the annular table surface of the annular table 112 for fixation, and the other end of the front cavity structure can directly extend to the side surface of the loudspeaker body 310 for fixation, to jointly construct the front sound cavity of the loudspeaker body 310 with the groove 110c and the loudspeaker body 310, and the embodiments of the present application do not limit this.

[0130] In order to output the sound signal, refer to FIG. 12, which is an enlarged view I of the region E2 shown in FIG. 11.

[0131] The first middle plate 110 (i.e., the plate body) is provided with a sound outlet 110d. The sound outlet 110d is used for the front sound cavity 310a of the loudspeaker body 310 to communicate with the sound hole 120a on the opening section 121, so that the sound signal of the loudspeaker body 310 is transmitted to the outside of the electronic device through the sound hole 120a, and the sound propagation path is shown by the dashed line S1 with an arrow in FIG. 12.

[0132] Specifically, the first middle plate 110 includes the first plate part 111 and the second plate part 1121, and the sound outlet 110d is located between the first plate part 111 and the second plate part 1121.

[0133] The first plate portion 111 can include a first plate surface and a second plate surface disposed in a Z-axis direction. The first plate portion 111 is located at the sound outlet side of the speaker body 310, and the first plate surface of the first plate portion 111 faces the front surface of the speaker body 310, and the second plate surface of the first plate portion 111 faces away from the front surface of the speaker body 310.

[0134] It should be noted that the surface between the first plate surface and the second plate surface of the first plate portion 111 is a side surface of the first plate portion 111, and the first plate surface and the second plate surface of the first plate portion 111 respectively intersect the side surface of the first plate portion 111. The first plate portion 111 can have a plurality of side surfaces, for example, in the case of a rectangular plate surface of the first plate portion 111, the first plate portion 111 has four side surfaces corresponding to the four edges of the rectangle.

[0135] The first reference surface P1 on which the first plate surface of the first plate portion 111 is located refers to a reference surface extending in the extension direction of the first plate surface of the first plate portion 111; and the second reference surface P2 on which the side surface of the first plate portion 111 is located refers to a reference surface extending in the extension direction of the side surface of the first plate portion 111. It can be understood that the first reference surface P1 and the second reference surface P2 are virtual reference surfaces and do not actually exist, and therefore are schematically shown by dashed lines in the figure. In the case that the sound generating device shown in FIG. 12 is installed in the electronic device shown in FIGS. 1 to 3, the side surface corresponding to the second reference surface P2 faces the sound outlet hole 120a, so that the sound outlet hole 120a is located on the side facing the second reference surface P2.

[0136] The second plate portion 1121 is spaced apart from the side on which the first reference surface P1 on which the first plate surface of the first plate portion 111 is located faces, and the side on which the second reference surface P2 on which the side surface of the first plate portion 111 is located faces. And the second plate portion 1121 can include a first plate surface and a second plate surface disposed in a Z-axis direction. The first plate surface of the second plate portion 1121 faces away from the first reference surface P1, and the second plate surface of the second plate portion 1121 faces the first reference surface P1.

[0137] It should be noted that the side to which the first reference surface P1 faces is the side of the first reference surface P1 facing the loudspeaker body 310, and the side to which the second reference surface P2 faces is the side of the second reference surface P2 facing away from the geometric center of the loudspeaker body 310. In the case where the sound production device shown in FIG. 12 is installed in the electronic device shown in FIGS. 1-3, the sound outlet 120a is located on the side of the second plate portion 1121 facing away from the second reference surface P2. In this case, the second plate portion 1121 is offset from the first plate portion 111 in the Z-axis direction and the Y-axis direction, so that the sound outlet 110d located between the first plate portion 111 and the second plate portion 1121 has an extension direction S2 extending from the first plate portion 111 to the second plate portion 1121, which is inclined with respect to the first reference surface P1. By inclined, it is meant that the included angle between the two is greater than 0° and less than 90°.

[0138] It should be noted that the extension direction S2 of the sound outlet 110d extending from the first plate portion 111 to the second plate portion 1121 refers to the direction of the sound outlet 110d extending in the direction in which the first plate portion 111 points to the second plate portion 1121, and the extension direction S2 is shown by a dashed line in the figure.

[0139] It can be understood that the first reference surface P1 of the first plate portion 111 is perpendicular to the thickness direction (i.e., the Z-axis direction) of the first plate portion 111, and therefore, in the case where the extension direction S2 of the sound outlet 110d is inclined with respect to the first reference surface P1 of the first plate portion 111, the extension direction S2 of the sound outlet 110d is also inclined with respect to the thickness direction (i.e., the Z-axis direction) of the first plate portion 111. In this way, the space occupied by the sound outlet 110d in the Z-axis direction can be reduced, thereby reducing the height of the sound production device 10 in the Z-axis direction, and further reducing the thickness of the electronic device.

[0140] Alternatively, in FIG. 12, the second plate portion 1121 is located between the side surface of the loudspeaker body 310 and the opening section 121, so that the loudspeaker body 310 reuses the space occupied by the second plate portion 1121 in the Z-axis direction, and the height of the sound production device 10 in the Z-axis direction can be reduced.

[0141] It can be understood that the aforementioned annular platform 112 is located on the side to which the first reference surface P1 faces, and has the condition of forming the second plate portion 1121, and based on this, in some embodiments, the second plate portion 1121 can be realized by a partial ring segment of the aforementioned annular platform 112. This will be described below in conjunction with FIG. 13.

[0142] By way of example, reference is made to FIG. 13, which is a structural schematic view of the first middle frame 100 in FIG. 6 from a second perspective.

[0143] The first middle plate 110 further comprises an inclined portion 113, which is inclined from the first plate portion 111 to the side facing the first reference plane P1. One end of the partial ring segment of the annular platform 112 is connected to the first plate portion 111 through the inclined portion 113, and the remaining ring segment of the annular platform 112 can directly extend to the first plate portion 111 to form the groove 110c. In this case, the inclined portion 113 serves as a sidewall of the groove 110c, or the inclined portion 113 serves as a region transitioning from the sidewall of the groove 110c to the bottom of the groove 110c, which is part of the groove 110c.

[0144] In FIG. 13, the partial ring segment of the annular platform 112 connected to the inclined portion 113 can be used to form the second plate portion 1121. In this case, the partial ring segment has the structural characteristics of the second plate portion 1121 in the foregoing FIG. 12, i.e., being arranged at the side facing the first reference plane P1 and the side facing the second reference plane P2.

[0145] In this embodiment, the partial ring segment of the annular platform 112 forming the second plate portion 1121 can no longer be additionally provided with the second plate portion 1121, thereby simplifying the structural design. Of course, in other embodiments, the second plate portion 1121 can also not be implemented through the partial ring segment of the annular platform 112, which is not limited in the embodiments of the present application.

[0146] The aforementioned sound outlet 110d can be correspondingly formed on the inclined portion 113. Since the inclined portion 113 is connected between the partial ring segment forming the second plate portion 1121 and the first plate portion 111, the sound outlet 110d formed on the inclined portion 113 is naturally located between the second plate portion 1121 and the first plate portion 111. It can be understood that since the inclined portion 113 is inclined from the first plate portion 111 to the side facing the first reference plane P1, the extension direction of the inclined portion 113 from the first plate portion 111 to the partial ring segment of the annular platform 112 is inclined relative to the first reference plane P1. Based on this, the aforementioned sound outlet 110d is formed on the inclined portion 113, which can obtain the sound outlet 110d having the aforementioned extension direction S2.

[0147] It can be understood that since the inclined portion 113 is part of the groove 110c, the sound outlet 110d formed on the inclined portion 113 is naturally formed on the groove 110c forming the front sound cavity 310a, thereby realizing the communication of the front sound cavity 310a. Of course, in other embodiments, the sound outlet 110d can also be arranged on the sound outlet channel communicating the front sound cavity 310a and the sound hole, which is not limited in the embodiments of the present application. Thus, the sound outlet 110d inclined relative to the Z-axis direction is obtained.

[0148] Please continue to refer to FIG. 12, the sound production device 10 further comprises a filter screen 700. The filter screen 700 extends from the second plate portion 1121 to the first plate portion 111 to cover the sound outlet 110d, so as to play a role of filtering dust and other impurities. Exemplarily, the filter screen 700 is a dustproof screen. FIG. 14 also shows a schematic view of the filter screen 700 covering the sound outlet 110d on the first middle plate 110 from another perspective. The filter screen 700 is extended by the second plate surface of the second plate portion 1121 along the inclined portion 113 to the second plate surface of the first plate portion 111, so as to cover the sound outlet 110d.

[0149] Please refer to FIG. 12 and FIG. 14, the first end of the filter screen 700 is fixed to the second plate surface of the second plate portion 1121; the second end of the filter screen 700 is fixed to the second plate surface of the first plate portion 111.

[0150] In order to facilitate the installation of the filter screen 700, please continue to refer to FIG. 12 and FIG. 14, the first middle plate 110 is provided with a mounting hole 110e, which penetrates the first plate surface and the second plate surface of the first middle plate 110. The mounting hole 110e is located on one side of the second plate surface of the second plate portion 1121 and opposite to the first end of the filter screen 700.

[0151] The mounting hole 110e is opposite to the first end of the filter screen 700, which means that the projection of the mounting hole 110e and the first end of the filter screen 700 in the Z-axis direction has an overlapping area. In the case that the first end of the filter screen 700 is fixed to the second plate surface of the second plate portion 1121, in order to facilitate the fixation of the first end of the filter screen 700 to the second plate surface of the second plate portion 1121, the mounting hole 110e is arranged on one side of the second plate surface of the second plate portion 1121. Since the first end of the filter screen 700 is opposite to the mounting hole 110e, that is, opposite to the second plate surface of the second plate portion 1121. In this way, the first end of the filter screen 700 can be fixed to the second plate surface of the second plate portion 1121 through the mounting hole 110e, so as to facilitate the installation of the filter screen 700.

[0152] It can be understood that in the case that the second plate surface of the first plate portion 111 of the first middle frame 100 is fixed to the first display area 011, the mounting hole 110e is blocked by the first display area 011, so that the sound signal transmitted by the front sound cavity 310a will not be transmitted to other positions outside the sound outlet hole 120a through the mounting hole 110e.

[0153] In the embodiment shown in FIG. 12, the filter screen 700 is fixed as a whole on the second plate surface of the first middle plate 110. Compared with the fixing scheme in which the filter screen 700 is fixed as a whole on the first plate surface of the first middle plate 110 in FIG. 5, the filter screen 700 is moved downward, providing more Z-direction (abbreviation of Z-axis direction) space for the loudspeaker body 310 to avoid the loudspeaker body 310 moving in the Y-axis direction. In this case, the loudspeaker body 310 can move leftward in the Y-axis direction to a position closer to the opening section 121 (about 6 mm leftward), shortening the distance L2 between the loudspeaker body 310 and the opening section 121 (specifically, the outer surface of the opening section 121), thereby optimizing the air flow speed and frequency response and other performances of the loudspeaker body 310.

[0154] Please refer to FIG. 15, which is an air flow simulation and frequency response simulation diagram of the sound generating device 10 shown in FIG. 12. As shown in (a) of FIG. 15, the maximum value of the air flow speed of the sound generating device 10 shown in FIG. 12 is about 29 m / s, while the air flow speed in FIG. 5 is as high as 46 m / s. Obviously, the air flow speed simulation result of the sound generating device 10 in FIG. 12 is better. In addition, as shown in (b) of FIG. 15, the loudness of the sound generating device 10 shown in FIG. 12 in the high frequency band of 4-7 kHz is obviously improved.

[0155] In addition, for the case in which the rear sound cavity 310b of the loudspeaker body 310 in FIG. 12 is a closed rear cavity, the sound generating device 10 can convert the space left by moving the loudspeaker body 310 leftward in the Y-axis direction into the space of the rear sound cavity 310b, which makes the volume of the rear sound cavity 310b increase by about 0.06 cc (cubic centimeter). It should be noted that the volume of the rear sound cavity 310b mainly affects the low frequency part of the sound generating device 10. With the increase of the volume of the rear sound cavity 310b, the low frequency peak moves leftward, so that the low frequency characteristics are improved, the bass is more prominent, and the sound is more mellow and powerful.

[0156] It should be noted that the above embodiments take the example that both ends of the filter screen 700 are fixed on the second plate surface of the first middle plate. In other embodiments, as shown in (a) of FIG. 16, the first end of the filter screen 700 is fixed on the second plate surface of the second plate part 1121, and the second end of the filter screen 700 is fixed on the first plate surface of the first plate part 111; or as shown in (b) of FIG. 16, the first end of the filter screen 700 is fixed on the first plate surface of the second plate part 1121, and the second end of the filter screen 700 is fixed on the second plate surface of the first plate part 111. It can be understood that, compared with the fixing scheme in which both ends of the filter screen 700 are fixed on the first plate surface side of the first middle plate 110 in FIG. 5, in the two embodiments in FIG. 16, one end is fixed on the second plate surface side of the first middle plate 110, so that more Z-direction space and Y-direction space can be provided for the loudspeaker body 310 at this end, so that the loudspeaker body 310 can move left on the Y-axis to a position closer to the opening section 121, thereby shortening the distance between the loudspeaker body 310 and the opening section 121, and optimizing the airflow speed and frequency response performance of the loudspeaker body 310, and the present application is not limited in this regard.

[0157] It should be noted that in (a) of FIG. 16, compared with the embodiment shown in FIG. 12, because the second end of the filter screen 700 is fixed on the first plate surface of the first plate part 111, the filter screen 700 is closer to the loudspeaker body 310, especially in the case where the loudspeaker body 310 moves left on the Y-axis. Based on this, the loudspeaker body 310 can be lifted upward while moving left on the Y-axis, so as to reduce the risk of the loudspeaker body 310 colliding with the second end of the filter screen 700 during vibration.

[0158] Referring to FIG. 5, a hole 110a is formed in the position opposite to the loudspeaker body 310 of the first middle plate 110, the loudspeaker body 310 extends into the hole 110a, and forms a front sound cavity 310a with the first display area 011. In this case, the distance L1 between the loudspeaker body 310 and the opening section 121 at least includes the following three parts:

[0159] The first part: the distance L11 between the loudspeaker body 310 and the hole edge region of the first middle plate 110. It can be understood that, in order to avoid the loudspeaker body 310 colliding with the hole edge region of the first middle plate 110 during vibration and to ensure that the sound signal is output through the filter screen 700, the loudspeaker body 310 needs to keep a distance L11 as a clearance space in the Y-axis direction from the hole edge region of the first middle plate 110. The existence of the distance L11 makes the distance L1 between the loudspeaker body 310 and the opening section 121 larger.

[0160] Second part: the span L12 of the filter screen 700 in the Y-axis direction. It can be understood that, because the loudspeaker body 310 extends into the hole 110a, the loudspeaker body 310 to the opening section 121 needs to span the filter screen 700, and therefore the distance L1 of the loudspeaker body 310 to the opening section 121 needs to consider the span L12 of the filter screen 700 in the Y-axis direction. The fixing scheme of the filter screen 700 in FIG. 5 makes the span L12 of the filter screen 700 in the Y-axis direction increase, which makes the distance L1 of the loudspeaker body 310 to the opening section 121 further increase.

[0161] Third part: the distance L13 of the filter screen 700 to the outer surface of the opening section 121.

[0162] As can be seen from the above, in FIG. 5, the loudspeaker body 310 extends into the hole 110a, and forms a front sound cavity 310a with the first display area 011, so that the distance L1 of the loudspeaker body 310 to the opening section 121 is large.

[0163] In order to shorten the distance of the loudspeaker body 310 to the opening section 121, in some embodiments, please refer to FIG. 17, which is a structural exploded schematic view of the first middle frame 100 and the loudspeaker body 310 in FIG. 6.

[0164] Among them, the first plate part 111 has a front cavity plate part 1111, and the front cavity plate part 1111 is opposite to the loudspeaker body 310 to construct a front sound cavity of the loudspeaker body 310 between the loudspeaker body 310.

[0165] The front cavity plate part 1111 opposite to the loudspeaker body 310 means that the front cavity plate part 1111 is located in the projection of the loudspeaker body 310 on the first reference surface P1 in the Z-axis direction. For example, the front cavity plate part 1111 can be understood as the area of the groove bottom of the groove 110c opposite to the loudspeaker body 310. Different from the front cavity plate part 1111, the first plate part 111 can include the groove bottom of the groove 110c (if a part of the groove bottom of the groove 110c comes from the inclined part 113, then this part does not belong to the first plate part 111) and the area of the first middle plate 110 connecting the annular table 112.

[0166] As can be seen, in the embodiment shown in FIG. 17, the position opposite to the loudspeaker body 310 of the first plate part 111 is provided as the front cavity plate part 1111 instead of the hole 110a shown in FIG. 5. In this case, the front cavity plate part 1111 serves as a structure for configuring the front sound cavity 310a of the loudspeaker body 310. Optionally, the distance between the loudspeaker body 310 and the front cavity plate part 1111 is 0.7 mm, i.e., the front cavity height of the loudspeaker body 310 is 0.7 mm. Compared with the embodiment shown in FIG. 5, please refer to FIG. 12, on the one hand, the loudspeaker body 310 does not need to pass through the hole 110a shown in FIG. 5, and naturally does not need to avoid the hole edge region shown in FIG. 5, so that the distance L2 between the loudspeaker body 310 and the opening section 121 can be shortened; on the other hand, because there is no hole 110a shown in FIG. 5, there is no blockage of the hole edge region shown in FIG. 5, plus the Z-direction space gain brought by the change of the fixed position of the filter screen 700, so that the loudspeaker body 310 can be moved upward in the Z-axis direction and leftward in the Y-axis direction, so that the distance L2 between the loudspeaker body 310 and the opening section 121 shown in FIG. 12 can be shortened.

[0167] As a manifestation of the shortening of the distance L2 between the loudspeaker body 310 and the opening section 121, optionally, please continue to refer to FIG. 12, the loudspeaker body 310 is moved leftward to above the filter screen 700 in the Z-axis direction, which is manifested as: the projection of the filter screen 700 and the loudspeaker body 310 in the thickness direction of the loudspeaker body 310 (i.e., the Z-axis direction) has an overlapping region.

[0168] In this case, the distance L2 between the loudspeaker body 310 and the opening section 121 no longer spans the entire filter screen 700, based on this, even if the fixing scheme of the filter screen 700 in FIG. 12 makes the span of the filter screen 700 in the Y-axis direction increase, the distance L2 between the loudspeaker body 310 and the opening section 121 is shortened compared with the distance L1 between the loudspeaker body 310 and the opening section 121 in FIG. 5, because the span of the entire filter screen 700 in the Y-axis direction no longer needs to be considered.

[0169] In addition, it needs to be explained that because the sound signal needs to be output through the sound outlet hole 120a on the opening section 121, the loudspeaker body 310 is usually arranged at the edge position of the first middle plate 110 close to the opening section 121. Generally speaking, this region is opposite to the boundary position between the chip on plastic (COP) bending part of the foldable display screen 01 and the flexible circuit board (FPC). The COP bending part refers to the area of the foldable display screen 01 adopting the COP packaging scheme that is bent to the back of the first display area 011, and the FPC is a circuit that connects the foldable display screen 01 and the mainboard of the electronic equipment 00 to realize signal transmission.

[0170] Exemplarily, refer to FIG. 18, which is a diagram of the relative position relationship between the loudspeaker body 310 and the back of the first display area 011 according to an embodiment of the present application. The position of the rectangular block in the diagram is the position of the loudspeaker body 310. The area on the back of the first display area 011 directly opposite to the loudspeaker body 310 is referred to as the component boundary area 0110. The area directly opposite to the loudspeaker body 310 is the area corresponding to the projection of the loudspeaker body 310 on the back of the first display area 011 along the Z-axis direction. As shown in the diagram, the component boundary area 0110 extends from the COP bending part 011a to the flexible circuit board 011b. Obviously, the component boundary area 0110 includes the boundary position of the COP bending part 011a and the flexible circuit board 011b. Based on this, the loudspeaker body 310 is directly opposite to the boundary position. In the specific implementation process, the COP bending part 011a and the flexible circuit board 011b of the first display area 011 have a step difference, so that the boundary position of the COP bending part 011a and the flexible circuit board 011b is prone to have a gap. In the related art, the component boundary area 0110 of the first display area 011 is used to construct the front sound cavity of the loudspeaker body 310, and it is difficult to achieve the X8 level sealing of the front sound cavity of the loudspeaker body 310 at the boundary position of the component boundary area 0110.

[0171] Please continue to refer to FIG. 17. The embodiment shown in FIG. 17 uses the front cavity plate part 1111 to construct the front sound cavity of the loudspeaker body 310 between the front cavity plate part 1111 and the loudspeaker body 310.

[0172] It can be understood that, because the front cavity plate part 1111 is opposite to the loudspeaker body 310, and the component boundary area 0110 in FIG. 18 is directly opposite to the loudspeaker body 310, the front cavity plate part 1111 is naturally opposite to the component boundary area 0110 in FIG. 18. In the case that the front cavity plate part 1111 is opposite to the component boundary area 0110 in FIG. 18, the front cavity plate part 1111 replaces the component boundary area 0110 in FIG. 18 to construct the front sound cavity of the loudspeaker body 310 between the front cavity plate part 1111 and the loudspeaker body 310. In this case, the component boundary area 0110 in FIG. 18 is no longer used to construct the front sound cavity of the loudspeaker body 310. It can be understood that the front cavity plate part 1111 is an integral structure, and does not have the aforementioned step difference. Therefore, when the front cavity plate part 1111 is used to construct the front sound cavity of the loudspeaker body 310, it is easier to achieve the X8 level sealing of the front sound cavity of the loudspeaker body 310.

[0173] Please continue to refer to FIG. 5, the fixing of the other end of the filter screen 700 and the sealing of the front sound cavity 310a of the speaker body 310 are both realized by the adhesive 350. Specifically, the other end of the filter screen 700 is embedded in the adhesive 350 and is fixed on the inclined surface 120b with a larger inclined angle by the adhesive 350; the front cavity structure 311 of the speaker body 310 is also fixed on the inclined surface 120b by the adhesive 350 that fixes the filter screen 700, thereby sealing the front sound cavity 310a.

[0174] The binding scheme that realizes both the sealing of the front sound cavity 310a and the fixing of the filter screen 700 by the adhesive 350 has the following problems: due to the change of the fixing scheme of the filter screen 700, the other end of the filter screen 700 is fixed on the inclined surface 120b with a larger inclined angle by the adhesive 350, which makes the front cavity structure 311 that is also fixed by the adhesive 350 need to be fixed on the inclined surface 120b. However, the scheme of fixing the front cavity structure 311 on the inclined surface 120b by the adhesive 350 has poor sealing performance due to the influence of the force direction, and it is difficult to realize the X8 level sealing of the front sound cavity 310a, and the sealing processing is complex. Further, in order to improve the sealing performance, screws are used for compression, which occupies a lot of space of the whole machine.

[0175] In order to better seal the front sound cavity 310a of the speaker body 310, in some embodiments of the present application, please refer to FIG. 19, which is an enlarged view two of the region E2 in FIG. 11. The annular table 112 has an annular table surface 112a facing away from the first reference surface P1. The annular table surface 112a is provided with a ring of sealing members 360 (such as sealing adhesive). The sealing members 360 surround the speaker body 310, and the sealing members 360 are shown from another perspective in FIG. 20.

[0176] As shown in FIG. 19, one end of the carrier frame 320 extends to one side of the annular table surface 112a to form a first fixing portion 321. In addition, the rear cavity structure 330 also has a second fixing portion 331 extending to one side of the annular table surface 112a, and the second fixing portion 331 and the first fixing portion 321 are distributed side by side on one side of the annular table surface 112a and are fixed to each other.

[0177] It can be understood that, in the case that the carrier 320 and the groove 110c and the loudspeaker body 310 enclose the front sound cavity 310a of the loudspeaker body 310, a gap can exist between the other end of the carrier 320 extending into the groove 110c and the groove 110c, and a gap can also exist between the end of the carrier 320 extending to the annular table 112a and the annular table 112a. In this case, the sound signal of the loudspeaker body 310 is transmitted to the outside of the front sound cavity 310a along the gap between the other end of the carrier 320 and the groove 110c, and then transmitted to the outside of the front sound cavity 310a through the gap between the annular table 112a and the end of the carrier 320 (i.e., the first fixing part 321), which is shown by a dashed line S3 in FIG. 19. In order to block the sound transmission channel, the sealing member 360 is bonded to the second fixing part 331 and the first fixing part 321 to block the channel of the front sound cavity 310a to the outside of the front sound cavity 310a through the gap between the annular table 112 and the first fixing part 321.

[0178] Here, the carrier 320 is taken as an example of a front cavity structure for constructing the front sound cavity 310a with the groove 110c and the loudspeaker body 310, and the sealing scheme of the front sound cavity 310a is described. In other embodiments, the front cavity structure can also be implemented by other structures, which are not limited in the embodiments of the present application.

[0179] It should be noted that, in the case that the second plate surface of the second plate part 1121 is fixed at the first end of the filter screen 700, the sealing member 360 for sealing the front sound cavity 310a is bonded to the annular table surface 112a of the annular table 112 facing away from the first plate part 111, and bonded to the first plate surface of the second plate part 1121. Apparently, in this embodiment, the fixing of the filter screen 700 and the sealing of the front sound cavity 310a achieve decoupling. In the case of achieving decoupling, the sealing of the front sound cavity 310a is not affected by the fixing of the filter screen 700, and the sealing processing of this embodiment is simpler.

[0180] Further, in the case that the first plate surface and the second plate surface of the second plate part 1121 both extend in the O-XY plane (in a direction perpendicular to the Z-axis direction) or substantially extend in the O-XY plane, the sealing member 360 and the filter screen 700 are not easy to peel off and fall off, and in this embodiment, screw pressing and reinforcement is not required, thereby saving the space of the whole machine. Of course, in the specific implementation process, screws can also be used for further pressing and reinforcement.

[0181] In addition, it can be understood that when the second plate portion 1121 is implemented by the partial ring segment of the ring-shaped platform, the first plate surface of the second plate portion 1121 is a partial area of the ring-shaped platform surface 112a, and the sealing member 360 is bonded on the ring-shaped platform surface 112a. Based on this, in the case that the first end of the filter screen 700 fixes the first plate surface of the second plate portion 1121 as shown in (b) of FIG. 16, the first end of the filter screen 700 can fix the first plate surface of the second plate portion 1121 through the sealing member 360, for example, the first end of the filter screen 700 is embedded in the sealing member 360, and the like.

[0182] FIGS. 6 to 20 introduce the internal structure of the sound production device 10. The cooperation relationship between the sound production device 10 and the first display area 011 shown in FIGS. 6 to 20 will be described below in combination with FIG. 21.

[0183] Exemplarily, please refer to FIG. 21, which is a cross-sectional schematic view of the sound production device 10 fixing the first display area 011 shown in FIG. 6.

[0184] Generally, the first middle plate 110 is provided with an inner screen bonding portion 114, which is distributed on the side surface side (i.e., the side toward each side surface of the first plate portion 111) of the first plate portion 111 and is flush or substantially flush with the second plate surface of the first plate portion 111 to carry the first display area 011. The inner screen bonding portion 114 and the first display area 011 are bonded in the area distributed on the side surface side of the first plate portion 111. For example, the inner screen bonding portion 114 is bonded with the first display area 011 through adhesive or the like, so that the sound production device 10 can fix the first display area 011.

[0185] Please refer to FIG. 22 in combination, which shows the inner screen bonding portion 114 from the perspective of the second plate surface of the first plate portion 111. In the specific implementation process, the inner screen bonding portion 114 can be understood as a region of a circle of the edge of the first middle plate 110 (since the complete first middle plate 110 is not shown, the partial region of the inner screen bonding portion 114 is shown in the figure by the unfilled dashed line), and the first plate portion 111 is distributed on the inner side of the inner screen bonding portion 114.

[0186] In order to further shorten the distance L2 from the loudspeaker body 310 to the opening segment 121, please refer to FIG. 21, on the side toward the second reference surface P2, the inner screen bonding portion 114 is provided with a notch 114a. The notch 114a is farther away from the second reference surface P2 than the second plate portion 1121 and the loudspeaker body 310, and the notch 114a faces the first plate portion 111. The notch 114a is shown by a dashed line in FIG. 21. The corresponding position of the notch 114a in the O-XY plane is shown by the region filled with a dotted pattern in FIG. 22.

[0187] The gap 114a can provide more space in the Z-axis direction and the Y-axis direction. The space in the Z-axis direction provided by the gap 114a can allow the second plate portion 1121 and the speaker body 310 to move downward in the Z-axis direction. The space in the Y-axis direction provided by the gap 114a can allow the first plate portion 111, the second plate portion 1121, and the speaker body 310 to move leftward in the Y-axis direction (e.g., 1 mm leftward).

[0188] It can be understood that the speaker body 310 continues to move leftward in the Y-axis direction, so that the distance L2 between the speaker body 310 and the opening section 121 can be further shortened. Optionally, the distance L2 between the speaker body 310 and the opening section 121 is about 5 mm. Compared with 7 mm, the distance L2 has benefits.

[0189] As a manifestation of shortening the distance L2 between the speaker body 310 and the opening section 121, the speaker body 310 moves above the filter screen 700, and the overlapping area of the projection of the speaker body 310 and the filter screen 700 in the Z-axis direction is larger than that in FIG. 12. It can also be understood that the speaker body 310 moves downward in the Z-axis direction and leftward in the Y-axis direction, so that the volume of the back sound cavity 310b in the Z-axis direction and the Y-axis direction can be increased.

[0190] It should be noted that the first display area 011 cannot be fixed at the gap 114a, so that the sound signal emitted by the speaker body 310 pushes the airflow to hit the first display area 011, which is easy to cause the first display area 011 to shake. To address this issue, the A shell 03 can be arranged to extend from the opening section 121 to the inner screen display surface of the first display area 011 (the first display area 011 includes an inner screen and an outer screen, and the inner screen display surface is also provided with an outer screen), so as to press the first display area 011 to reduce the shaking of the first display area 011.

[0191] The above-described embodiments shown in FIGS. 6 to 21 take the front sound cavity 310a of the speaker body 310 as an open front cavity and the back sound cavity 310b of the speaker body 310 as a closed back cavity as an example for illustration. In this case, the above-described first middle plate 110 is an embodiment in which the plate body is used as the middle plate of the electronic device.

[0192] In some other embodiments, the front sound cavity 310a of the speaker body 310 can be a closed front cavity, the back sound cavity 310b of the speaker body 310 can be an open back cavity; or, the front sound cavity 310a of the speaker body 310 can be a closed front cavity, the back sound cavity 310b of the speaker body 310 can be a closed back cavity; or, the front sound cavity 310a of the speaker body 310 can be an open front cavity, the back sound cavity 310b of the speaker body 310 can be an open back cavity.

[0193] It can be understood that, in the case that the front sound cavity 310a of the speaker body 310 is a closed front cavity, the plate body can be a structure of the speaker itself for constructing the front sound cavity 310a of the speaker body 310, in which case the sound production apparatus 10 is the speaker, and is arranged at the back side of the first display area 011 and fixes the first middle plate 110 of the first middle frame 100; or the plate body can be the first middle frame 100, in which case the structure of the speaker itself is used for constructing the front sound cavity 310a of the speaker body 310, and the first middle frame 100 is used for providing the sound outlet communicating with the front sound cavity 310a of the speaker body 310.

[0194] It can also be understood that, in the case that the back sound cavity 310b of the speaker body 310 is a closed back cavity, the back cavity structure 330 comes from the structure contained in the speaker itself.

[0195] It can also be understood that, in the case that the back sound cavity 310b of the speaker body 310 is an open back cavity, the back cavity structure 330 can include a structure used as the back cover of the electronic device, such as the first back cover 200 shown in FIG. 3, that is, part of the back cavity structure 330 can be provided by the back cover of the electronic device, such as the first back cover 200, in which case the first back cover 200 can be part of the sound production apparatus 10. Of course, the first back cover 200 can also be fixed later, in which case the first back cover 200 can not be part of the sound production apparatus 10.

[0196] Exemplarily, please refer to FIG. 23, which is a cross-sectional schematic view of a sound production apparatus 10 with an open back cavity 310b according to an embodiment of the present application.

[0197] The sound production apparatus 10 in FIG. 23 further includes a first back cover 200, which is used for constructing the open back cavity 310b of the speaker body 310. For example, the first back cover 200, the first middle plate 110 and the speaker body 310 are sealingly connected two by two to form the open back cavity 310b. Compared with the closed back cavity, the sound production apparatus 10 in FIG. 23 reuses the first back cover 200 to construct the back sound cavity 310b of the speaker body 310, which can leave more space for the back sound cavity 310b, and also can thin the electronic device.

[0198] In the case of employing the open back cavity, in order to further shorten the distance L3 from the loudspeaker body 310 to the opening section 121, the loudspeaker body 310 can be moved from the position shown by the dashed line to the position shown by the solid line. Specifically, the loudspeaker body 310 can be moved upward in the Z-axis direction to pass over the second plate portion 1121, in which case the second plate portion 1121 does not hinder the loudspeaker body 310 from being moved in the Y-axis direction, and the loudspeaker body 310 can be further moved leftward in the Y-axis direction, thereby shortening the distance L3 from the loudspeaker body 310 to the opening section 121. Optionally, the distance L3 from the loudspeaker body 310 to the opening section 121 is approximately 5 mm. The distance L3 has a benefit compared to 7 mm. It can be understood that, because the open back cavity has a larger volume, even if the loudspeaker body 310 is moved upward, the effect on the sound quality of the back cavity is small.

[0199] As a manifestation of shortening the distance L3 from the loudspeaker body 310 to the opening section 121: the loudspeaker body 310 is moved to above the second plate portion 1121, i.e., to the side of the second plate portion 1121 that faces away from the first plate portion 111, and the projection of the loudspeaker body 310 and the second plate portion 1121 in the Z-axis direction has an overlapping region. In this way, the loudspeaker body 310 to the opening section 121 no longer spans the entire filter screen 700, and based on this, the distance L3 from the loudspeaker body 310 to the opening section 121 is shortened compared to FIG. 5 because the span of the entire filter screen 700 no longer needs to be considered. Moreover, compared to the case in FIG. 12 in which the loudspeaker body 310 is moved to the side of the filter screen 700 corresponding to the region of the sound outlet 110d, in this embodiment, the loudspeaker body 310 is moved to the side of the filter screen 700 corresponding to the region of the second plate portion 1121, and the distance L3 from the loudspeaker body 310 to the opening section 121 is further shortened.

[0200] It should be noted that, because the loudspeaker body 310 is moved to above the second plate portion 1121, the part of the carrier frame 320 that is used to hold and fix the loudspeaker body 310 in FIG. 23 does not extend to the groove 110c, but also moves to above the second plate portion 1121 along with the loudspeaker body 310, and is naturally located on the side of the annular mesa 112a. In this case, unlike the embodiment of FIG. 19, the upper end of the part of the carrier frame 320 that extends to the sound outlet side of the loudspeaker body 310 (one end of the front cavity structure) fixes the loudspeaker body 310, and the lower end of the part of the carrier frame 320 that holds the loudspeaker body 310 (the other end of the front cavity structure) is fixed to the annular mesa 112a by the sealing member 360.

[0201] In addition, it should be noted that, as can be seen from the adaptive combination of Figure 3, the side of the loudspeaker 300 facing away from the hole section 121 in the Y-axis direction is the battery 400. In the case where the loudspeaker body 310 in Figure 23 is moved to the left in the Y-axis direction, more space can be left for the battery 400 in the Y-axis direction. In this case, the battery 400 can be lengthened in the Y-axis direction, thereby increasing the capacity of the battery 400, and further improving the standby time of the electronic device.

[0202] Finally, it should be noted that in the description of the present specification, specific features, structures, etc. can be combined in any one or more embodiments or examples in a suitable manner. Moreover, the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A sound producing device, characterized by, The sound production device comprises: a speaker body; a plate body; an acoustic outlet is arranged on the plate body; the acoustic outlet is located between a first plate portion and a second plate portion of the plate body; the first plate portion is located on the sound emission side of the speaker body; the first plate portion has a first plate surface facing the speaker body; the second plate portion is arranged on the side of the first plate surface of the first plate portion facing the first reference surface and the side of the first plate portion facing the second reference surface; a filter screen; the filter screen extends from the second plate portion to the first plate portion to cover the acoustic outlet; wherein the first end of the filter screen is fixed to the plate surface of the second plate portion facing the first reference surface, and / or the second end of the filter screen is fixed to the plate surface of the first plate portion facing away from the speaker body.

2. The sound production device of claim 1, wherein, The first plate portion further has a second plate surface facing away from the speaker body; the second plate portion has a first plate surface facing away from the first reference surface and a second plate surface facing the first reference surface; the first end of the filter screen is fixed to the second plate surface of the second plate portion, and the second end of the filter screen is fixed to the first plate surface of the first plate portion; or the first end of the filter screen is fixed to the first plate surface of the second plate portion, and the second end of the filter screen is fixed to the second plate surface of the first plate portion.

3. Sound production device according to claim 1 or 2, characterized in that The filter screen and the speaker body have an overlapping area in the thickness direction of the speaker body.

4. The sound production device of any one of claims 1 to 3, wherein, The first plate portion has a front cavity plate portion; The front cavity plate portion is opposite to the speaker body to form a front sound cavity of the speaker body between the speaker body and the front cavity plate portion.

5. The sound production device of any one of claims 1 to 4, wherein, The plate body further comprises an annular table; The annular table connects the first plate portion and forms a groove with the first plate portion; the groove opening faces the speaker body to at least form the front sound cavity of the speaker body with the speaker body; The acoustic outlet communicates with the front sound cavity; Part of the ring segment of the annular table forms the second plate portion.

6. The sound production device of claim 5, wherein, The plate body further comprises an inclined portion; The inclined portion is inclined from the first plate portion to the side facing the first reference surface; the part of the ring segment connects the first plate portion through the inclined portion to form the groove; the acoustic outlet is arranged in the inclined portion to communicate with the front sound cavity.

7. A sound production device according to claim 5 or 6, characterized in that The annular table has an annular table surface facing away from the first reference surface; the annular table surface corresponds to the area of the part of the ring segment to form the plate surface of the second plate portion facing away from the first reference surface; the annular table surface is provided with a ring of sealing members; The sound production device further comprises a front cavity structure; one end of the front cavity structure is fixed to the annular table surface through the sealing members, and the other end of the front cavity structure is fixed to the speaker body to form the front sound cavity of the speaker body with the groove and the speaker body.

8. The sound production device of claim 7, wherein, The front cavity structure comprises a bearing frame; One end of the bearing frame extends to one side of the annular table surface to form one end of the front cavity structure; the other end of the bearing frame extends to the sound emission side of the speaker body to bear the speaker body, and the other end of the bearing frame forms the other end of the front cavity structure.

9. Sound production device according to claim 7 or 8, characterized in that The annular mesa corresponds to the area of the partial ring segment and extends along the extension direction of the first reference surface.

10. The sound production device of claim 9, wherein, The first end of the filter screen is fixed to the second plate surface of the second plate portion and opposite the mounting hole.

11. The sound production device of any one of claims 1 to 10, wherein, The plate body is further provided with a mounting hole; the second plate portion has a second plate surface facing the first reference surface; the mounting hole is located on one side of the second plate surface of the second plate portion; The first end of the filter screen is fixed to the second plate surface of the second plate portion and opposite the mounting hole.

12. An electronic device, comprising: Comprising: A display screen; the inner surface of the side of the display screen is fixed to the frame; the frame is provided with a sound hole; The sound production device according to any one of claims 1 to 11; wherein the first plate portion of the sound production device has a second plate surface facing away from the loudspeaker body; the back of the display screen faces the second plate surface of the first plate portion; the sound hole is located on one side of the second plate portion facing away from the second reference surface and communicates with the sound outlet.

13. The electronic device of claim 12, wherein, The back of the display screen comprises a component boundary area extending from the chip on plastic (COP) bending portion of the display screen to the flexible circuit board of the display screen; The front cavity plate portion of the first plate portion is opposite the component boundary area.

14. The electronic device of claim 12 or 13, wherein, The plate body of the sound production device serves as a middle plate of the electronic device; the middle plate is located on the back side of the display screen to carry the display screen, and the middle plate fixes the frame.

15. The electronic device of claim 14, wherein, The second plate surface of the first plate portion carries the display screen; the middle plate further has an inner screen bonding portion; the inner screen bonding portion is distributed on the side of the first plate portion and is bonded to the area of the display screen distributed on the side of the first plate portion; On the side facing the second reference surface, the inner screen bonding portion is provided with a notch; the notch is farther away from the second reference surface than the second plate portion and the loudspeaker body; the notch faces the first plate portion.

16. The electronic device of any of claims 12 to 15, wherein, The sound production device further comprises a rear cavity structure; the rear cavity structure comprises a back cover of the electronic device; The loudspeaker body is located on the side of the second plate portion facing away from the first reference surface.

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