Sound-generating device and cleaning device

Abstract

Sound-generating device, characterized in that it comprises: a housing (100) comprising a conduit hole (110) and an interior space communicating with the conduit hole (110); a sound-generating element (200) located in the interior space; an electrical connecting line (300) electrically connected to the sound-generating element (200), the electrical connecting line (300) being guided through the conduit hole (110); a sound-attenuating element (400) located between the electrical connecting line (300) and the conduit hole (110) to seal the gap between the electrical connecting line (300) and the conduit hole (110).

Description

CROSS-REFERENCE TO RELEVANT REGISTRATION The present application claims priority over Chinese patent application No. 202322306718.0 dated August 25, 2023. TECHNICAL AREA The present application relates to the field of smart home technology, in particular a sound-generating device and a cleaning device. STATE OF THE ART With the continuous development of smart home technology, cleaning robots are increasingly being used in everyday cleaning tasks, and their intelligence is constantly improving, offering many conveniences. Control methods for cleaning robots can be categorized as manual button control, remote control, voice control, and the like. Cleaning robots are also typically equipped with sound-generating devices to emit speech for communication purposes. Specifically, with voice control and remote control, the sound-generating device facilitates communication and responds to the control command by emitting speech. The sound-generating device typically comprises a trumpet and a housing. The trumpet is located inside the housing, with the trumpet and housing enclosing a sound chamber to amplify the sound emitted by the sound-generating device and improve its sound output. To enable data transmission between the trumpet and the cleaning robot's main control unit for controlling the trumpet's sound content, the housing is provided with a through-hole. The trumpet's electrical connection cable is routed through this through-hole and connected to the main control unit outside the housing.To facilitate the installation of the electrical connecting cable, the inner diameter of the through-hole is usually larger than the outer diameter of the connecting cable; the gap between the through-hole and the connecting cable will result in an insufficient seal of the trumpet's sound chamber and thus sound leakage, leading to distortions in the trumpet's sound. CONTENT OF THE PRESENT APPLICATION Against this background, the present application offers a sound-generating device and a cleaning device. On the one hand, the present application provides a sound-generating device comprising: a housing 100 comprising a conduit hole 110 and an interior space communicating with the conduit hole 110; a sound-generating element 200 located in the interior space; an electrical connecting line 300 electrically connected to the sound-generating element 200, the electrical connecting line 300 passing through the conduit hole 110, the relative position of the electrical connecting line 300 and the conduit hole 110 comprising the sealing position; a sound-dampening element 400 which, when the electrical connecting line 300 is in the sealing position relative to the conduit hole 110, is located between the electrical connecting line 300 and the conduit hole 110 to seal the gap between the electrical connecting line 300 and the conduit hole 110. The sound damping element 400 is firmly connected to the outer wall of the electrical connecting line 300, wherein the sound damping element 400 moves from the outside of the line hole 110 into the line hole 110 and slides relative to the inner wall of the line hole 110 when the electrical connecting line 300 moves relative to the line hole 110 in the direction of the sealing position, so that when the electrical connecting line 300 and the line hole 110 are in the sealing position, the sound damping element rests against the inner wall of the line hole 110 and seals the gap between the electrical connecting line 300 and the line hole 110. The sound-absorbing element 400 comprises a contact area and a guide area, the guide area being located at an end of the contact area facing away from the sound-generating element 200; the radial cross-sectional area of ​​the guide area decreasing continuously in the direction away from the contact area; the sound-absorbing element 400 projecting through the guide area into the conduit hole 110 and sliding relative to the inner wall of the conduit hole 110 as the electrical connecting conduit 300 moves relative to the conduit hole 110 towards the sealing position, such that when the electrical connecting conduit 300 and the conduit hole 110 are in the sealing position, the contact area rests against the inner wall of the conduit hole 110 and seals the gap between the electrical connecting conduit 300 and the conduit hole 110. The sound damping element 400 is firmly connected to the inner wall of the conduit hole 110 and the sound damping element 400 rests against the outer wall of the electrical connecting conduit 300. The sound-absorbing element 400 completely surrounds the outer circumference of the electrical connecting cable 300. The inner contour of the conduit hole 110 corresponds to the shape of the outer contour of the radial cross-section of the electrical connecting conduit 300, wherein the sound damping element 400 has a uniform thickness in the circumferential direction of the electrical connecting conduit 300. The housing 100 comprises a sound-generating surface, a rear end surface 120, and a circumferential surface 130. The sound-generating surface and the rear end surface 120 are spaced apart from each other. The circumferential surface 130 surrounds the sound-generating surface and the rear end surface 120 by a complete circumference. The circumferential surface 130 is connected to both the sound-generating surface and the rear end surface 120. The sound-generating surface, the rear end surface 120, and the circumferential surface 130 enclose an interior space. The sound-generating element 200 is connected to the sound-generating surface and / or the circumferential surface 130. The sound-emitting side of the sound-generating element 200 faces the sound-generating surface. The electrical connecting line 300 is located on the opposite side of the sound-generating element 200 from the sound-emitting side. The conduit hole 110 is located on the rear end surface. 120 are planned;wherein the axis of the conduit hole 110 is perpendicular to the rear end surface 120.; The sound damping element 400 is elastic and the sound damping element (400) comprises at least one of foam, soft rubber and felt. The housing 100 is a housing made of soft rubber. On the other hand, the present application also provides a cleaning device comprising a sound-generating device as described above and a device body, wherein the sound-generating device is arranged on the device body. The device body comprises an outer shell that encloses a receiving chamber; the outer shell is provided with a sound outlet hole that communicates with the receiving chamber; the sound generating device is located in the receiving chamber and is opposite the sound outlet hole; the housing of the sound generating device is connected to the outer shell, or at least a portion of the housing of the sound generating device is integrally formed with the outer shell. BRIEF DESCRIPTION OF THE DRAWING Fig. 1 is a schematic structural representation of a sound-generating device provided by an embodiment of the present application; Fig. 2 is a schematic structural representation of the housing in a sound-generating device provided by an embodiment of the present application; Fig. 3 is a schematic structural representation of the sound-generating element, the electrical connecting line and the sound-attenuating element in a sound-generating device provided by an embodiment of the present application. DETAILED DESCRIPTION To further illustrate the technical means and effects used in the present application to achieve the intended purpose of the application, the detailed description of the specific implementation, structure, features and effects of a sound-generating device proposed in accordance with the present application is provided below, together with the attached drawings and preferred embodiments. On the one hand, embodiments of the present application, as shown in Figs. 1-3, provide a sound-generating device comprising: a housing 100 comprising a conduit hole 110 and an interior space communicating with the conduit hole 110; a sound-generating element 200 located in the interior space; an electrical connecting line 300 electrically connected to the sound-generating element 200, the electrical connecting line 300 passing through the conduit hole 110, the relative position of the electrical connecting line 300 and the conduit hole 110 also including the sealing position; a sound-dampening element 400 which, when the electrical connecting line 300 is in the sealing position relative to the conduit hole 110, is positioned between the electrical connecting line 300 and the conduit hole 110 to seal the gap between the electrical connecting line 300 and the conduit hole 110.The sound-generating element 200 is a loudspeaker or trumpet, consisting primarily of a frame, a sound-radiating diaphragm, a sound winding, and a magnet. The sound winding is located within the magnetic gap of the magnet, and the sound-radiating diaphragm is connected to both the frame and the sound winding. When the sound-generating device is used in the cleaning machine, the main control unit of the cleaning machine sends an electrical signal to the sound winding. The action of the magnet generates a driving force that causes the sound winding to vibrate, thus producing a sound. The electrical connecting line 300 is connected to the sound winding. This line comprises two signal lines, each connected to one of the two ends of the sound winding, forming an electrical circuit with the sound winding.Two signal lines are routed from the sound-generating element 200 on the rear side of the sound-radiating diaphragm. After the two signal lines exit the sound winding, they can be sheathed with a wire sheath to form an electrical connecting line 300. The outer surface of the electrical connecting line 300 is approximately circular and has a conduit hole 110 through which the entire electrical connecting line 300 passes. Alternatively, in some embodiments, a sound-attenuating element 400 can be used to cover the outer circumference of the two independent signal lines. In this case, the two signal lines are joined by the sound-attenuating element 400, and the number of conduit holes 110 is one, so that the sound-attenuating element 400 and the signal line it covers can be integrally penetrated.Alternatively, in some embodiments, two conduit holes 110 may be provided, each through which two signal lines pass. The electrical connecting line 300 is described below as an example of a complete cable consisting of a signal line enclosed by a sheath. The relative position of the electrical connecting line 300 and the line hole 110 also includes the sealing position, i.e., the relative position of the electrical connecting line 300 and the line hole 110 when the sound-generating device is installed and ready for operation; alternatively, the sealing position is a position to which the electrical connecting line 300 moves relative to the line hole 110 so that the sound-absorbing element 400 can seal the gap; alternatively, the sound-absorbing element 400 plugs the gap at least when the relative position of the electrical connecting line 300 and the line hole 110 reaches a sealing position.The sound-absorbing element 400 can be arranged in various shapes between the conduit hole 110 and the electrical connecting cable 300. It can be positioned according to the shape of the conduit hole 110 and the connecting cable 300 so that all gaps between the conduit hole 110 and the electrical connecting cable 300 are blocked, thus preventing sound from escaping. For example, the sound-absorbing element 400 can be provided only on one side of the outer circumference of the electrical connecting cable 300, with the outer circumferential surface of the electrical connecting cable 300, which differs from the sound-absorbing element 400, being used in such a way that it rests against the inner wall of the conduit hole 110.More specifically, the electrical connecting conductor 300 can be a cable with a square radial cross-section, and the conduit hole 110 is a square hole larger than the outer contour of the electrical connecting conductor 300, and the sound-absorbing element 400 can cover the three adjacent sides of the outer circumferential surface of the electrical connecting conductor 300. When the electrical connecting conductor 300 is passed through the conduit hole 110, the outer wall of one side not covered by the sound-absorbing element 400 lies directly against the inner wall of that side of the conduit hole 110, while the sound-absorbing element 400 lies against the inner walls of the other three sides of the conduit hole 110.Alternatively, the electrical connecting line 300 can be a cable with a circular outer contour in radial cross-section, and the line hole 110 is a circular hole that is larger than the outer contour of the connecting line 300. The sound damping element 400 can cover half of the circumference of the outer wall of the electrical connecting line 300 and seamlessly transition into the part of the outer wall of the electrical connecting line 300 not covered by the sound damping element 400.Alternatively, the sound-dampening element 400 can be wrapped around the outer circumference of the electrical connecting cable 300 in a complete circuit to achieve an effective seal of the electrical connecting cable 300 in all directions. This prevents a gap from forming between any side of the electrical connecting cable 300 and the inner wall of the cable hole 110 as a result of external forces or vibrations, which would impair the stability of the sound effect. More specifically, the electrical connecting cable 300 can be a cable with a square outer contour of the radial cross-section or a circular outer contour of the cross-section, and the sound-dampening element 400 surrounds the outer circumference of the square or circular cable in a complete circuit.Furthermore, in some embodiments the electrical connecting line 300 can also be a cable with an irregular radial cross-section, for example a semicircle or an ellipse, the sound damping element 400 can adapt to the irregular shape of the electrical connecting line 300 by changing its shape, so that the gap between the electrical connecting line 300 and the line hole 110 is completely blocked. Furthermore, the sound-absorbing element 400 is elastic, such that its material comprises at least one of foam, soft rubber, and felt, preferably foam. During installation of the electrical connecting cable 300, the sound-absorbing element 400, through its elastic deformation, allows the electrical connecting cable 300 to be easily inserted through the cable hole 110. Upon rebounding, the sound-absorbing element 400 fills the space between the electrical connecting cable 300 and the cable hole 110, thus sealing it. The sound-generating device and the cleaning device proposed in embodiments of the present application prevent sound leakage by providing a sound-attenuating element between the electrical connecting cable and the cable opening and ensure the sealing of the sound chamber, thereby guaranteeing the sound-generating performance of the sound-generating device. In the prior art, the housing is provided with a through-hole; the electrical connecting cable of the trumpet is routed through this through-hole and connected to the main control unit located outside the housing.To allow the installation of the electrical connecting cable, the inner diameter of the through-hole is usually larger than the outer diameter of the electrical connecting cable; the gap between the through-hole and the electrical connecting cable leads to an insufficient seal of the trumpet's sound chamber, and the sound leakage in turn leads to a distorted sound reproduction of the trumpet.In the technical solution of the present application, the sound damping element is located between the electrical connecting cable and the cable hole. The sound damping element fits tightly to the electrical connecting cable and the cable hole in order to seal the gap between the electrical connecting cable and the cable hole. This creates a sealed sound chamber, ensuring that the sound is concentrated and emitted through the sound outlet hole of the housing, thereby achieving a loud sound and ensuring good sound quality. To simplify the explanation, the following example is used in which the sound-absorbing element 400 completely encloses the outer circumference of the electrical connecting cable 300. Naturally, the features of the following embodiments also apply if the sound-absorbing element 400 is only partially arranged circumferentially around the cable 300. The connection between the sound-absorbing element 400, the electrical connecting cable 300, and the cable hole 110 can be made in various ways. In one embodiment, for example, the sound-absorbing element 400 is firmly connected to the outer wall of the electrical connecting cable 300, and the sound-absorbing element 400 rests against the inner wall of the cable hole 110. The sound-absorbing element 400 and the electrical connecting cable 300 are firmly connected. For example, an adhesive can be used to bond the sound-absorbing element 400 to the outer wall of the electrical connecting cable 300 around a complete circumference. This prevents any displacement between the sound-absorbing element 400 and the electrical connecting cable 300 during installation and use. The sound-absorbing element 400 is in close contact with the outer wall of the electrical connecting cable 300 within the area that covers the electrical connecting cable 300. This ensures that there is no gap between the outer walls of the sound-absorbing element 400 and the electrical connecting cable 300, thus preventing any sound leakage.The shape of the outer circumferential surface of the sound damping element 400 can be adapted to the shape of the inner wall of the conduit hole 110, whereby it is understood that the outer diameter of the sound damping element 400 should be slightly larger than the inner diameter of the conduit hole 110, so that the sound damping element 400 can rest against the inner wall of the conduit hole 110 and thus ensure a sealing effect. During the assembly of the electrical connecting cable 300, when the electrical connecting cable 300 is guided through the cable hole 110 and moves relative to the cable hole 110 towards the sealing position, the sound damping element 400, which is rigidly connected to the electrical connecting cable 300, moves from the outside of the cable hole 110 into the cable hole 110, taking the electrical connecting cable 300 with it, and slides relative to the inner wall of the cable hole 110, so that when the electrical connecting cable 300 and the cable hole 110 are in the sealing position, the sound damping element rests against the inner wall of the cable hole 110 to seal the gap between the electrical connecting cable 300 and the cable hole 110.The sound-absorbing element 400 and the electrical connecting cable 300 can be penetrated and installed synchronously without the need for separate installation of the sound-absorbing element 400. To further facilitate the insertion of the sound-absorbing element 400 into the conduit hole 110 and to prevent the end of the sound-absorbing element 400 from getting caught on the edge of the conduit hole 110, the sound-absorbing element 400 in one embodiment has a contact area and a guide area, the guide area being located at the end of the contact area opposite the sound-generating element 200. The radial cross-sectional area of ​​the guide area decreases continuously in the direction away from the contact area.The sound damping element 400 projects through the guide area into the conduit hole 110 and slides relative to the inner wall of the conduit hole 110 when the electrical connecting conduit 300 moves relative to the conduit hole 110 in the direction of the sealing position, so that when the electrical connecting conduit 300 and the conduit hole 110 are in the sealing position, the contact area rests against the inner wall of the conduit hole 110 to seal the gap between the electrical connecting conduit 300 and the conduit hole 110. The contact area and the guide area are two regions in the axial direction of the sound-absorbing element 400. The radial cross-sectional area of ​​the guide area gradually decreases away from the contact area, with the decrease being uniform in the circumferential direction, so that the outer circumferential surface of the guide area is conically shaped. The guide area has a small end surface facing away from the contact area, which facilitates the insertion of the guide area into the conduit hole 110. As the electrical connecting conductor 300 moves relative to the conduit hole 110, the inclined surface of the guide area gradually comes into contact with the conduit hole 110 and is compressed by the inner wall of the conduit hole 110, before transitioning into the contact area and entering the conduit hole 110.When the electrical connecting cable 300 and the cable hole 110 are in the sealing position, the contact area seals the gap between the electrical connecting cable 300 and the cable hole 110, making the installation of the sound damping element 400 smoother. In another embodiment, the sound damping element 400 is firmly connected to the inner wall of the conduit hole 110 and the sound damping element 400 rests against the outer wall of the electrical connecting conduit 300. The sound-absorbing element 400 and the conduit hole 110 are firmly connected. For example, the sound-absorbing element 400 can be glued to the inner wall of the conduit hole 110 with an adhesive around a complete circumference, so that the sound-absorbing element 400 and the conduit hole 110 do not move during installation and use. The sound-absorbing element 400 is in close contact with the inner wall of the conduit hole 110 in the area that covers the inner wall of the conduit hole 110. This ensures that there is no gap between the sound-absorbing element 400 and the inner wall of the conduit hole 110, and thus no sound leakage occurs. The sound-absorbing element 400 includes a central opening for threading the electrical connecting cable 300, the shape of which is adapted to the outer contour of the electrical connecting cable 300.However, it is understandable that the inner diameter of the central opening of the sound-absorbing element 400 should be slightly smaller than the outer diameter of the electrical connecting cable 300 so that the sound-absorbing element 400 can rest against the outer wall of the electrical connecting cable 300 and thus ensure a sealing effect. It should be noted that the embodiment for attaching the sound-absorbing element 400 to the electrical connecting cable 300 differs from the method for attaching the sound-absorbing element 400 to the cable hole 110. The sound-absorbing element 400 can cover a larger area along the length of the electrical connecting cable 300, resulting in greater connection strength and reduced susceptibility to detachment.The structure of the electrical connecting cable 300 is, meanwhile, relatively stable, while the cable hole 110 in the housing 100 made of flexible material deforms slightly and pulls on the sound damping element 400. In one embodiment, the inner contour of the conduit hole 110 corresponds to the shape of the outer contour of the radial cross-section of the electrical connecting conductor 300. The shape of the conduit hole 110 can assume several forms and be adjusted according to the outer contour of the electrical connecting conductor 300. In one embodiment, the conduit hole 110 is a circular hole, the outer contour of the radial section of the electrical connecting conductor 300 is circular, and the sound-dampening element 400 has a uniform thickness in the circumferential direction of the electrical connecting conductor 300. The sound-dampening element 400 is a circular cylindrical structure with a uniform circumferential thickness; in its natural state, the degree of deformation and the force are uniform in every direction and position.In comparison to a square or irregularly shaped hole such as the conduit hole 110, this avoids uneven compression of the sound damping element 400 at the sides and corners of the conduit hole 110, which could lead to weak points in the sealing of the sound damping element 400. In one embodiment, the end surface of the sound-absorbing element 400, which faces the end of the sound-generating element 200 along the longitudinal direction of the electrical connecting line 300, rests against the sound-generating element 200. This stabilizes the relative position between the electrical connecting line 300 and the sound-generating element 200, reduces the amplitude of the relative movement of the electrical connecting line 300 to the conduit hole 110 caused by the vibration of the electrical connecting line due to the sound wave, and prevents the sound-absorbing element 400 from being compressed on one side due to the movement of the electrical connecting line 300, thus preventing a gap from forming between it and the electrical connecting line 300 or the conduit hole 110. In one embodiment, the housing 100 comprises a sound-generating surface, a rear end surface 120 and a circumferential surface 130, the sound-generating surface and the rear end surface 120 are spaced apart from each other, the circumferential surface 130 surrounds the sound-generating surface and the rear end surface 120 by a complete circumferential circumference, the circumferential surface 130 is connected to the sound-generating surface and the rear end surface 120, the sound-generating surface, the rear end surface 120 and the circumferential surface 130 form an enclosed interior space.The sound-generating element 200 is connected to the sound-generating surface and / or the circumferential surface 130, the sound-emitting side of the sound-generating element 200 is opposite the sound-generating surface, the electrical connecting line 300 is located on one other side of the sound-generating element 200 facing away from the sound-emitting side, and the line hole 110 is provided on the rear end surface 120. The rear end surface 120 is located opposite the side of the electrical connecting cable 300 of the sound-generating element 200, and the cable hole 110 is arranged on the rear end surface 120 to avoid complicated wiring of the electrical connecting cable 300 inside the unit. The rear end surface 120, the circumferential surface 130, and the side of the sound-generating element 200 opposite the sound-generating surface together form the rear sound chamber of the sound-generating element 200. The electrical connecting cable 300 runs within the rear sound chamber to prevent interference from strong sound waves in the front sound chamber on the side of the sound-generating surface.The rear end surface 120 is a plane, and the hole axis of the conduit hole 110 is perpendicular to the rear end surface 120, ensuring that the sound damping element 400 can effectively rest against the conduit hole 110 on each side in the circumferential direction of the electrical connecting conduit 300. In one embodiment, the housing 100 is made of soft rubber, which exhibits good sealing performance and ensures a seal between the front and rear sound chambers. The soft rubber housing also has good elasticity and provides a damping effect. During the cleaning process of the cleaning device, this damping effect can dampen the vibrations of the cleaning device, allowing the sound-generating device to maintain good sound quality even under vibration. On the other hand, embodiments of the present application also include a cleaning device comprising a sound-generating device as described above and a device body, wherein the sound-generating device is arranged on the device body. More specifically, the device body consists of an outer shell that encloses a recording chamber, the outer shell is provided with a sound outlet hole that communicates with the recording chamber, the sound generation device is located in the recording chamber and the sound generation device is opposite the sound outlet hole. The device body is designed for mobile cleaning. Its outer contour is an approximately flat, circular cylindrical shape. The outer shell comprises a base surface that faces the floor during cleaning, a top surface that faces the top, and side walls that enclose the top and bottom. The sound-generating device or sound outlet can be positioned at multiple locations on the device body, and the sound can be generated from multiple locations. For example, it can be located on the top, bottom, or side. The cleaning device may consist of a single sound-generating device or be equipped with multiple sound-generating devices at different locations.The sound generation device is electrically connected to the main control unit of the device body and can control different sound generation devices depending on the operating conditions to produce a sound. For example, when interacting with and responding to the user, the number of sound generation devices for sound output can be selected depending on the distance to the user, and the sound generation device directed towards the user can be selected to perform the sound output. Alternatively, in cases where an alarm is required, several sound generation devices can be selected to emit a sound simultaneously as a warning. The housing 100 of the sound-generating device can be connected to the outer shell of the device via a connecting element. In an embodiment where the housing 100 of the sound-generating device is made of soft rubber, a connecting element with higher hardness can be incorporated into the soft rubber housing, which, in conjunction with the outer shell of the device, secures the sound-generating device.Alternatively, at least a part of the housing 100 of the sound-generating device can be integrally formed with the outer shell of the device. For example, the housing 100 of the sound-generating device can comprise an upper shell that forms a front sound chamber and a rear shell that forms a rear sound chamber. When machining the outer shell of the device, the outer shell and the upper shell are formed in one piece. The rear shell is connected to the upper shell, and the sound-generating element 200 of the sound-generating device is sealed inside it. This makes the position of the sound-generating device more stable and simplifies installation. Furthermore, the cleaning device includes special features such as loud sound and good sound effect from the aforementioned sound generation device, which will not be discussed in detail here. The above description does not constitute a limitation of the scope of protection of the present application, but merely serves to illustrate specific embodiments of the present application. Any modification or substitution that would be obvious to those skilled in the art in this field and that can be derived from the disclosure of the present application falls within the scope of protection of the present application as defined by the accompanying claims. Therefore, the scope of protection of the present application should be subject to the scope of protection of the claims. QUOTES INCLUDED IN THE DESCRIPTION This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature CN 202322306718.0

[0001]

Claims

Sound-generating device, characterized in that it comprises: a housing (100) comprising a conduit hole (110) and an interior space communicating with the conduit hole (110); a sound-generating element (200) located in the interior space; an electrical connecting line (300) electrically connected to the sound-generating element (200), the electrical connecting line (300) being guided through the conduit hole (110); a sound-attenuating element (400) located between the electrical connecting line (300) and the conduit hole (110) to seal the gap between the electrical connecting line (300) and the conduit hole (110). Sound-generating device according to claim 1, characterized in that the relative position of the electrical connecting line (300) and the line hole (110) comprises a sealing position; wherein the sound-absorbing element (400) is firmly connected to the outer wall of the electrical connecting line (300), wherein, when the electrical connecting line (300) moves relative to the line hole (110) in the direction of the sealing position, the sound-absorbing element (400) moves from the outside of the line hole (110) into the line hole (110) and slides relative to the inner wall of the line hole (110), so that when the electrical connecting line (300) and the line hole (110) are in the sealing position, the sound-absorbing element rests against the inner wall of the line hole (110) and seals the gap between the electrical connecting line (300) and the line hole (110). Sound-generating device according to claim 1 or 2, characterized in that the sound-absorbing element (400) comprises a contact area and a guide area, wherein the guide area is located at an end of the contact area facing away from the sound-generating element (200); wherein the radial cross-sectional area of ​​the guide area decreases continuously in the direction away from the contact area; wherein, when the electrical connecting line (300) moves relative to the line hole (110) in the direction of the sealing position, the sound-absorbing element (400) projects through the guide area into the line hole (110) and slides relative to the inner wall of the line hole (110), so that when the electrical connecting line (300) and the line hole (110) are in the sealing position, the contact area rests against the inner wall of the line hole (110) and seals the gap between the electrical connecting line (300) and the line hole (110). Sound generating device according to one of claims 1 to 3, characterized in that the sound damping element (400) is firmly connected to the inner wall of the conduit hole (110), wherein the sound damping element (400) rests against the outer wall of the electrical connecting conduit (300). Sound generating device according to one of claims 1 to 4, characterized in that the sound damping element (400) completely surrounds the outer circumference of the electrical connecting line (300). Sound generating device according to one of claims 3 to 5, characterized in that the inner contour of the conduit hole (110) corresponds to the shape of the outer contour of the radial cross-section of the electrical connecting line (300), wherein the sound damping element (400) has a uniform thickness in the circumferential direction of the electrical connecting line (300). Sound-generating device according to one of claims 1 to 6, characterized in that the housing (100) comprises a sound-generating surface, a rear end surface (120) and a circumferential surface (130), wherein the sound-generating surface and the rear end surface (120) are arranged at a certain distance from each other, wherein the circumferential surface (130) surrounds the sound-generating surface and the rear end surface (120) by a complete revolution, wherein the circumferential surface (130) is connected to the sound-generating surface and the rear end surface (120) respectively, wherein the sound-generating surface, the rear end surface (120) and the circumferential surface (130) enclose the interior space;wherein the sound-generating element (200) is connected to the sound-generating surface and / or the circumferential surface (130), wherein the sound-emitting side of the sound-generating element (200) is opposite the sound-generating surface, wherein the electrical connecting line (300) is located on a different side of the sound-generating element (200) facing away from the sound-emitting side, wherein the line hole (110) is arranged at the rear end surface (120); wherein the axis of the line hole (110) is perpendicular to the rear end surface (120). Sound-generating device according to one of claims 1 to 7, characterized in that the sound-absorbing element (400) is elastic, wherein the material of the sound-absorbing element (400) comprises foam, soft rubber or felt; and / or that the housing (100) is a housing made of soft rubber. Cleaning device, characterized in that the cleaning device comprises the sound generating device according to one of claims 1 to 8 and the device body, wherein the sound generating device is arranged on the device body. Cleaning device according to claim 9, characterized in that the device body comprises an outer shell, wherein the outer shell encloses the receiving space, wherein the outer shell is provided with a sound outlet hole which communicates with the receiving space, wherein the sound generating device is located within the receiving space, and wherein the sound generating device is located opposite the sound outlet hole; wherein the housing of the sound generating device is connected to the outer shell, or wherein at least a portion of the housing of the sound generating device is integrally formed with the outer shell.

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