Voice module and cleaning equipment
By designing a voice module with good assembly sound insulation in the cleaning equipment, the noise interference problem is solved, and the voice control effect and user experience are improved.
Patent Information
- Application Number
- CN202421047406.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-05-14
AI Technical Summary
The voice modules of existing cleaning equipment are equipped with poor sealing and sound insulation, which causes the cleaning equipment's own noise to interfere with the voice module's sound collection of user commands, affecting the voice control effect.
Design a voice module, including a mount, sound pickup assembly and seal. The mounting base is equipped with a receiving slot and a sound inlet hole. The sound pickup assembly collects sound through the sound in the receiving slot. The seal is located between the sound pickup assembly and the housing to block noise transmission.
By improving noise isolation, reducing noise interference, improving the sound acquisition accuracy of voice modules for user instructions, enhancing the voice control effect of cleaning equipment, and improving user experience.
Smart Images

Figure CN222622892U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cleaning, in particular to a voice module and cleaning equipment. Background Art
[0002] As people's requirements for quality of life continue to increase, more and more families choose to equip their homes with cleaning equipment such as sweeping robots, scrubbers, and mops. These cleaning equipment can automatically perform heavy and dirty cleaning tasks on behalf of users, freeing users' hands.
[0003] In the related art, some high-end cleaning equipment products are often equipped with voice control modules, which can control the operation of the sweeping robot through voice commands. However, the cleaning equipment with voice modules on the market currently has noise generated during the cleaning operation and movement of the cleaning equipment itself, which will also be received by the voice module, interfering with the voice module's collection of the command sound issued by the user, resulting in poor voice control effect of the cleaning equipment and affecting the user's experience. Utility Model Content
[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a voice module with good assembly sound insulation, which can block the transmission of noise to the microphone and improve the interference of noise on the sound collection of the microphone.
[0005] The utility model also provides a cleaning device with the voice module.
[0006] According to the voice module of the first embodiment of the utility model, applied to a cleaning device, the voice module includes:
[0007] A mounting seat, provided with a receiving groove, the mounting seat comprising a top wall provided on one side of the receiving groove, the top wall being provided with a first sound inlet hole, the first sound inlet hole being communicated with the receiving groove, and the mounting seat being installed on the housing of the cleaning device;
[0008] A sound pickup assembly is disposed in the receiving groove, and the sound pickup assembly collects sound through the first sound inlet hole; and
[0009] A sealing member is located in the receiving groove and is arranged between the sound pickup assembly and the housing.
[0010] The voice module according to the embodiment of the utility model has at least the following beneficial effects:
[0011] By setting a sound pickup component and a mounting seat, the sound pickup component is set in the receiving groove of the mounting seat, and the mounting seat is provided with a first sound inlet hole connected to the receiving groove. The sound pickup component can collect sound through the first sound inlet hole. When the voice module is applied to the sweeping robot, the voice control function can be realized. The voice module also includes a seal. By setting the seal between the sound pickup component and the housing of the cleaning device, the seal has a blocking effect on the sound transmitted from the side of the seal away from the sound pickup component. When the voice module is applied to the sweeping robot, the seal can block the noise transmitted from the sweeping robot to the receiving groove, and can reduce the noise transmitted to the sound pickup component through the receiving groove. It can improve the problem that the working noise of the sweeping robot itself interferes with the sound pickup component in collecting voice commands, so that the sound pickup component can collect clear voice commands, so that the sweeping robot can accurately perform the corresponding functional operations, improve the voice control effect of the sweeping robot, and improve the user experience.
[0012] According to some embodiments of the present invention, the mounting seat includes a groove bottom wall forming the accommodating groove, the groove bottom wall is arranged relatively spaced apart from the top wall, and the sealing member is connected between the pickup assembly and the groove bottom wall.
[0013] According to some embodiments of the utility model, the pickup assembly includes a circuit board and a pickup, the pickup is connected to a side of the circuit board facing the bottom wall of the slot, the circuit board is provided with a second sound inlet hole, the second sound inlet hole penetrates the circuit board along the thickness direction of the circuit board and is connected to the pickup hole of the pickup;
[0014] The sealing member is clamped between the circuit board and the bottom wall of the slot, and the sealing member can be flexibly deformed to cover the pickup.
[0015] According to some embodiments of the present utility model, the circuit board is provided with a first positioning hole penetrating the circuit board along the thickness direction of the circuit board;
[0016] The mounting base comprises:
[0017] A base, provided with the receiving groove and the groove bottom wall, the groove bottom wall is provided with a first positioning column on a side facing the receiving groove, and the first positioning column is provided with a second positioning hole; and
[0018] A top cover is connected to the base and seals the circuit board and the seal in the accommodating groove. A second positioning column is provided on the side of the top cover facing the base. The second positioning column passes through the first positioning hole and is inserted into the second positioning hole.
[0019] According to some embodiments of the utility model, the thickness of the seal is greater than the height of the first positioning column protruding from the bottom wall of the groove, and the seal can lift the circuit board to the side of the first positioning column away from the bottom wall of the groove, so that a gap is formed between the circuit board and the first positioning column.
[0020] According to some embodiments of the present invention, the material of the sealing element is a sound insulation material, and the material of the sealing element includes one or more of sponge, rubber, and silicone.
[0021] According to some embodiments of the utility model, the voice module also includes a waterproof breathable membrane, which is arranged between the circuit board and the top wall, and one end of the waterproof breathable membrane covers the first sound inlet hole, and the other end of the waterproof breathable membrane covers the second sound inlet hole.
[0022] According to some embodiments of the present invention, a convex rib is provided on one side of the top wall facing the bottom wall of the groove, and the convex rib abuts against the circuit board to hold the circuit board against the sealing member.
[0023] According to some embodiments of the present invention, a boss is provided on a side of the top wall away from the receiving groove, and the first sound inlet hole passes through the boss and the top wall;
[0024] The voice module also includes a decorative sheet, which is connected to a side of the top wall away from the receiving groove, and a first notch is provided on the outer periphery of the decorative sheet so that the boss passes through the first notch.
[0025] The cleaning device according to the second embodiment of the utility model comprises a housing and a voice module according to any of the above embodiments, wherein the voice module is installed on the housing.
[0026] The cleaning device according to the embodiment of the utility model has at least the following beneficial effects: the voice module of the embodiment of the first aspect is adopted, the voice module is provided with a sound pickup component and a mounting seat, the sound pickup component is provided in the receiving groove of the mounting seat, the mounting seat is provided with a first sound inlet hole connected to the receiving groove, the sound pickup component can collect sound through the first sound inlet hole, so that the cleaning device can realize the voice control function. The voice module also includes a seal, by arranging the seal between the sound pickup component and the housing of the cleaning device, the seal has a blocking effect on the sound transmitted from the side of the seal away from the sound pickup component, that is, the seal can block the noise transmitted from the inside of the cleaning device to the receiving groove, the noise transmitted to the sound pickup component through the receiving groove can be reduced, the problem that the working noise of the cleaning device itself interferes with the sound pickup component collecting voice commands can be improved, the sound pickup component can collect clear voice commands, so that the cleaning device can accurately perform the corresponding functional operation, improve the voice control effect of the cleaning device, and improve the user experience.
[0027] According to some embodiments of the utility model, the mounting seat is provided with a mounting groove, and the mounting groove is arranged on a side of the groove bottom wall away from the accommodating groove;
[0028] The cleaning device also includes a ranging radar, which is arranged in the installation groove.
[0029] According to some embodiments of the utility model, the housing includes a first surface, the first surface is provided with an opening; the cleaning device also includes a flip cover, the flip cover is rotatably connected to the first surface to cover or reveal the opening, and one end of the flip cover rotatably connected to the first surface is provided with a second notch;
[0030] The mounting seat is connected to the outer shell and penetrates the second notch. The mounting seat includes a top cover. The outer periphery of the top cover includes a first outer peripheral surface. The distance from the first outer peripheral surface to the center line of the top cover decreases from one end of the first outer peripheral surface close to the outer shell to the other end away from the outer shell.
[0031] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:
[0033] Figure 1 A first cross-sectional view of a voice module according to an embodiment of the present utility model;
[0034] Figure 2 for Figure 1 A partial enlarged view of the middle A;
[0035] Figure 3 An exploded diagram of a voice module according to an embodiment of the present utility model;
[0036] Figure 4 A second cross-sectional view of the voice module of an embodiment of the utility model;
[0037] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;
[0038] Figure 6 A top view of a voice module according to an embodiment of the present utility model;
[0039] Figure 7 This is a schematic diagram of the structure of a cleaning device according to an embodiment of the utility model;
[0040] Figure 8This is a schematic diagram of the cleaning device according to an embodiment of the utility model when the flip cover is in a rotating state.
[0041] Figure Number:
[0042] Cleaning device 10; housing 100; first surface 100a; flip cover 110; second notch 110a;
[0043] Voice module 200; mounting seat 210; base 211; receiving groove 211a; mounting groove 211b;
[0044] Groove bottom wall 2111; connecting hole 2111a; first positioning column 2112; second positioning hole 2112a;
[0045] Top cover 212; top wall 2121; first sound inlet hole 2121a; second positioning column 2122; threaded hole 2122a;
[0046] convex rib 2123; boss 2124; first outer peripheral surface 2125; fastening screw 201;
[0047] Sound pickup assembly 220; circuit board 221; second sound inlet hole 221a; first positioning hole 221b; sound pickup 222;
[0048] Sound pickup hole 222a; sealing member 230; waterproof breathable membrane 240; decorative sheet 250; first notch 250a. DETAILED DESCRIPTION
[0049] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0050] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0051] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
[0052] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.
[0053] In the related art, some cleaning equipment, such as sweeping robots, are often equipped with voice control modules on high-end products, which can control the operation of sweeping robots through voice commands. However, the assembly sealing and sound insulation of the voice modules of cleaning equipment currently on the market are poor, and the noise generated by the cleaning operation and movement of the cleaning equipment itself will also be received by the voice module, interfering with the voice module's collection of the command sound issued by the user, resulting in poor voice control effect of the cleaning equipment and affecting the user's experience.
[0054] To solve the above problems, the present application provides a voice module.
[0055] Specifically, the voice module provided in this application is applied to cleaning equipment, and the voice module is used to collect voice commands issued by the user. The cleaning equipment can perform corresponding functional operations according to the collected voice commands, so that the cleaning equipment has voice control function. Among them, the cleaning equipment can be cleaning equipment such as a sweeping robot, a sweeping and mopping machine, a mopping robot, a floor scrubber, etc. The following will mainly take the application of the voice module to a sweeping robot as an example for detailed description.
[0056] Please refer to Figure 1 , Figure 1 FIG. 2 is a first cross-sectional view of the voice module of the embodiment of the present utility model. In the embodiment of the present application, the voice module 200 includes a mounting seat 210 and a sound pickup assembly 220 .
[0057] The mounting seat 210 is used as a positioning, mounting and bearing component of the voice module 200, and can form the main external contour of the voice module 200. The mounting seat 210 is provided with a receiving groove 211a, so that the electronic components and functional components of the voice module 200 can be arranged in the receiving groove 211a, for example, the pickup assembly 220 can be arranged in the receiving groove 211a. At the same time, the mounting seat 210 can also be used as a connecting member, and the mounting seat 210 is also used to be installed on the housing of the cleaning equipment. For example, the mounting seat 210 can be connected to the housing of the sweeping robot so that the entire voice module 200 is installed on the housing of the sweeping robot.
[0058] The mounting base 210 includes a top wall 2121 disposed on one side of the receiving groove 211a. It can be understood that the top wall 2121 is a wall of the mounting base 210 away from the cleaning device housing. The top wall 2121 is provided with a first sound inlet hole 2121a, which is connected to the receiving groove 211a. The sound pickup assembly 220 is disposed in the receiving groove 211a, and the sound pickup assembly 220 can collect sound through the first sound inlet hole 2121a.
[0059] It can be understood that the sound pickup component 220 is used to collect external sounds through the first sound inlet hole 2121a. For example, the voice command issued by the user is transmitted to the first sound inlet hole 2121a through the ambient air, and can enter the receiving groove 211a through the first sound inlet hole 2121a and be collected by the sound pickup component 220.
[0060] Among them, the top wall 2121 has a certain isolation effect. The top wall 2121 is used to seal the pickup assembly 220 in the receiving groove 211a. The part of the top wall 2121 except the first sound inlet hole 2121a can isolate the receiving groove 211a from the external environment to block and reduce the dust and water vapor in the external air from entering the receiving groove 211a, avoid corrosion damage to the pickup assembly 220, and improve the service life of the pickup assembly 220.
[0061] When the voice module 200 is installed on the housing of the sweeping robot, the sweeping robot itself will generate noise during cleaning and movement, and these bottom noises will be transmitted upward to the receiving groove 211a through the housing and the mounting seat 210, causing these noises to be collected by the sound pickup component 220, interfering with the collection of external voice commands by the sound pickup component 220. In this regard, the voice module 200 of the embodiment of the present application is also provided with a seal 230.
[0062] Please continue to refer to Figure 1 The sealing member 230 is located in the receiving groove 211a and is disposed between the sound pickup assembly 220 and the housing of the cleaning device.
[0063] It is understandable that the seal 230 can be made of sound insulation material, so that the seal 230 has a good sound insulation effect and can block or weaken the transmission of sound to a certain extent. For example, the material of the seal 230 can be a sound insulation material such as sponge, rubber, foam, etc.
[0064] The seal 230 is arranged between the sound pickup assembly 220 and the housing of the cleaning device, that is, the seal 230 is arranged on the side of the sound pickup assembly 220 away from the top wall 2121, that is, the side of the seal 230 away from the sound pickup assembly 220 to pick up sound. Based on the sealing barrier effect of the seal 230, the sound of the seal 230 away from the side of the sound pickup assembly 220 can be blocked from being transmitted toward the side of the sound pickup assembly 220 to pick up sound.
[0065] Then, by setting the seal 230 between the sound pickup component 220 and the housing of the cleaning device, the seal 230 has a blocking effect on the sound transmitted from the side of the seal 230 away from the sound pickup component 220 (that is, the bottom of the mounting base 210). When the voice module 200 is applied to a sweeping robot, the seal 230 can block the noise transmitted from the inside of the sweeping robot to the receiving groove 211a, and can reduce the noise transmitted to the sound pickup component 220 through the receiving groove 211a. It can improve the problem that the sweeping robot's own working noise interferes with the sound pickup component 220 in collecting voice commands, so that the sound pickup component 220 can collect clear voice commands, so that the sweeping robot can accurately perform corresponding functional operations.
[0066] According to the voice module 200 provided by the utility model, it includes a sound pickup component 220 and a mounting base 210. The sound pickup component 220 is arranged in a receiving groove 211a of the mounting base 210. The mounting base 210 is provided with a first sound inlet hole 2121a connected to the receiving groove 211a. The sound pickup component 220 can collect sound through the first sound inlet hole 2121a. When the voice module 200 is applied to a sweeping robot, a voice control function can be realized. The voice module 200 also includes a seal 230, which is arranged between the sound pickup component 220 and the housing of the cleaning device. The seal 230 has a blocking effect on the sound transmitted from the side of the seal 230 away from the sound pickup component 220. When the voice module 200 is applied to a sweeping robot, the seal 230 can block the noise transmitted from the inside of the sweeping robot to the receiving groove 211a, and can reduce the noise transmitted to the sound pickup component 220 through the receiving groove 211a. It can improve the problem that the sweeping robot's own working noise interferes with the sound pickup component 220 in collecting voice commands, so that the sound pickup component 220 can collect clear voice commands, so that the sweeping robot can accurately perform corresponding functional operations, thereby improving the voice control effect of the sweeping robot and improving the user experience.
[0067] Please refer to Figure 1 The mounting base 210 further includes a groove bottom wall 2111 forming the accommodating groove 211a, the groove bottom wall 2111 and the top wall 2121 are arranged relatively spaced apart, and the sealing member 230 is connected between the pickup assembly 220 and the groove bottom wall 2111.
[0068] The mounting base 210 is also provided with a groove bottom wall 2111. When the voice module 200 is installed on the sweeping robot, the groove bottom wall 2111 can separate the receiving groove 211a from the internal space of the sweeping robot. Then, the noise generated during the working process of the sweeping robot needs to be transmitted to the receiving groove 211a and received by the sound pickup component 220. It needs to pass through the groove bottom wall 2111 and the seal 230 in turn before it can be transmitted to the sound pickup component 220. When the noise passes through the groove bottom wall 2111, the propagation medium is changed from air to a solid structure, which blocks and weakens the noise to a certain extent, reduces the noise intensity and transmission ability, and then through the blocking effect of the seal 230, the noise is weakened twice, which can effectively improve the noise blocking effect.
[0069] Please refer to Figure 2 , Figure 2 for Figure 1 A partial enlarged view of the A in the middle. The sound pickup assembly 220 includes a circuit board 221 and a sound pickup 222. The sound pickup 222 is connected to the side of the circuit board 221 facing the bottom wall 2111 of the groove. The circuit board 221 is provided with a second sound inlet hole 221a. The second sound inlet hole 221a penetrates the circuit board 221 along the thickness direction of the circuit board 221 and is connected to the sound pickup hole 222a of the sound pickup 222. The sound pickup 222 can collect sound through the first sound inlet hole 2121a, the second sound inlet hole 221a and the sound pickup hole 222a. The sound pickup 222 can be a microphone.
[0070] Among them, the first sound inlet hole 2121a and the second sound inlet hole 221a can be coaxially arranged, that is, the axis of the first sound inlet hole 2121a coincides with the axis of the second sound inlet hole 221a. It can be understood that the first sound inlet hole 2121a and the second sound inlet hole 221a are coaxially arranged, so that the first sound inlet hole 2121a and the second sound inlet hole 221a can be directly connected, and there is no need to set other sound channels to change the sound propagation direction between the two, avoiding the meandering of the sound channel, and the external sound can be propagated in one direction into the pickup 222, which can reduce the loss of the sound transmission process, so that the pickup 222 can collect loud and clear sound, so that the sweeping robot can more accurately identify the voice command issued by the user.
[0071] The pickup 222 is arranged on the side of the circuit board 221 facing the bottom wall 2111 of the groove, that is, the side of the circuit board 221 facing away from the top wall 2121, so that the circuit structure connecting the pickup 222 and the circuit board 221 is located on the side of the circuit board 221 facing away from the top wall 2121. These circuit structures are far away from the first sound inlet hole 2121a, and have better waterproof and dustproof effects.
[0072] The number of the sound pickups 222 can be one or more. When the number of the sound pickups 222 is more, the number of the first sound inlet holes 2121a and the second sound inlet holes 221a are also more, and the number of the first sound inlet holes 2121a and the number of the second sound inlet holes 221a are the same as the number of the sound pickups 222.
[0073] In order to improve the voice control effect, in one embodiment, the number of microphones 222 is set to be multiple. It can be understood that by setting multiple microphones 222, the sound data can be processed according to the sounds collected by the multiple microphones 222, for example, volume compensation or noise reduction processing can be performed, and finally a clearer sound can be obtained to accurately identify the voice command issued by the user.
[0074] Moreover, multiple microphones 222 can be arranged at a certain distance or angle to form a microphone array. By analyzing the sound collected by each microphone 222, the angle and distance position of the sound source relative to the voice module 200 can be calculated and determined, so that the voice module 200 has the function of sound source positioning. When the voice module 200 using multiple microphones 222 is applied to a sweeping robot, the sweeping robot can approach or move away from the user through the sound source positioning function according to the specific usage scenario / mode, so as to better serve the user.
[0075] In one embodiment, the number of the pickups 222 is three, and the three pickups 222 are evenly distributed around the center line of the mounting base 210 .
[0076] In one embodiment, please refer to Figure 1 and Figure 2 The sealing member 230 is clamped between the circuit board 221 and the groove bottom wall 2111 , and the sealing member 230 can be flexibly deformed to cover the pickup 222 .
[0077] It can be understood that the material used to make the seal 230 is a flexible material, and the seal 230 can be interference fitted between the circuit board 221 and the groove bottom wall 2111, so that the seal 230 can produce flexible deformation under the clamping force of the circuit board 221 and the groove bottom wall 2111.
[0078] like Figure 2 As shown, the seal 230 is tightly attached to the circuit board 221 and the bottom wall 2111 of the groove under the clamping force between the circuit board 221 and the bottom wall 2111 of the groove, and the pickup 222 is connected to the side of the circuit board 221 facing the bottom wall 2111 of the groove, and the pickup 222 occupies part of the space. Then, the part of the seal 230 close to the pickup 222 is flexibly deformed under the pressure of the pickup 222, so that the pickup 222 can be fully surrounded and contacted by the seal 230, as shown in FIG. Figure 2As shown, except for a surface where the pickup 222 is connected to the circuit board 221, the rest of the outer surface of the pickup 222 can be covered by the seal 230. Then, the seal 230 can flexibly deform to cover the pickup 222, and the seal 230 can isolate the pickup 222 from the air in the receiving groove 211a, further preventing the noise transmitted to the receiving groove 211a through the mounting base 210 from entering the pickup 222, thereby greatly improving the effect of isolating noise.
[0079] It should be pointed out that the seal 230 can not only isolate and seal the pickup 222, but also be used to be in close contact with the surface of the circuit board 221 to isolate and seal other electronic devices and circuit structures on the surface of the circuit board 221 from the receiving groove 211a, thereby achieving a waterproof function for the circuit board 221 and preventing water vapor from accidentally entering the receiving groove 211a and causing corrosion damage to the circuit board 221.
[0080] Moreover, since the material used to make the seal 230 is a flexible material such as sponge, rubber, etc., based on the material properties of these materials, the seal 230 has a certain buffering and shock-absorbing ability. The seal 230 can absorb part of the vibration transmitted to the mounting base 210 when the sweeping robot is working, thereby weakening the vibration transmitted to the circuit board 221 through the mounting base 210, and avoiding the vibration of the circuit board 221 from affecting the collection of the pickup 222.
[0081] The material of the sealing member 230 may include one or more of sponge, rubber and silicone.
[0082] In one embodiment, the material of the sealing member 230 is EPDM (Ethylene-Propylene-Diene Monomer), commonly known as foam rubber. The EPDM material has good waterproofness and good sound insulation performance, and is also a flexible material, which can well meet the sealing requirements of the sealing member 230.
[0083] In some optional embodiments, the seal 230 may also be composed of multiple layers of different materials. For example, the seal 230 may include two layers stacked up and down, the layer close to the pickup 222 may be a rubber material, and the layer close to the groove bottom wall 2111 may be a sponge material.
[0084] Please refer to Figure 3 , Figure 4 and Figure 5 , Figure 3 This is an exploded view of the voice module of an embodiment of the utility model. Figure 4 This is a second cross-sectional view of the voice module of an embodiment of the utility model. Figure 5 for Figure 4The mounting base 210 includes a base 211 and a top cover 212. The base 211 is provided with the above-mentioned receiving groove 211a and the groove bottom wall 2111. The groove bottom wall 2111 is provided with a first positioning column 2112 on the side facing the receiving groove 211a. The first positioning column 2112 is provided with a second positioning hole 2112a. The top cover 212 is connected to the base 211 and seals the circuit board 221 and the sealing member 230 in the receiving groove 211a. The top cover 212 is provided with a second positioning column 2122 on the side facing the base 211. The second positioning column 2122 is inserted into the second positioning hole 2112a.
[0085] Then, the mounting base 210 of the present embodiment is composed of a base 211 and a top cover 212 connected to facilitate the assembly of the pickup assembly 220 and the sealing member 230 .
[0086] In one embodiment, please refer to 4 and Figure 5 The circuit board 221 is provided with a first positioning hole 221b penetrating the circuit board 221 along the thickness direction of the circuit board 221. When the top cover 212 is connected to the base 211, the second positioning column 2122 is penetrated through the first positioning hole 221b and inserted into the second positioning hole 2112a.
[0087] The first positioning column 2112 defines the assembly position of the circuit board 221 in the receiving groove 211 a , and the first positioning column 2112 limits the freedom of horizontal movement of the circuit board 221 , thereby preventing the circuit board 221 from moving horizontally.
[0088] Specifically, through the above-mentioned arrangement, during the assembly process of the mounting base 210, the second positioning column 2122 of the top cover 212 passes through the first positioning hole 221b of the circuit board 221 and is connected to the second positioning column 2122 of the base 211. In this way, while the top cover 212 is positioned and connected to the base 211 through the first positioning column 2112, the first positioning column 2112 also positions the circuit board 221 by cooperating with the first positioning hole 221b. In other words, the top cover 212 and the circuit board 221 are positioned based on the same set of positioning structures.
[0089] Then, the top cover 212 and the circuit board 221 can be positioned based on the same set of positioning structures, so that the positioning and assembly of the top cover 212 and the circuit board 221, as well as the positioning and assembly of the top cover 212 and the base 211 can be carried out simultaneously, which can improve the assembly efficiency of the mounting base 210; moreover, by setting only one set of positioning structures to position the top cover 212 and the circuit board 221, the number of positioning structures is reduced, the overall structure of the mounting base 210 can be simplified, and the accommodating space of the accommodating groove 211a can be increased.
[0090] It can be understood that the offset between the axis of the first sound inlet hole 2121a and the axis of the second sound inlet hole 221a is also an important factor affecting the sound collection effect of the pickup 222. When the first sound inlet hole 2121a and the second sound inlet hole 221a are completely coaxial, the two holes do not block or obstruct each other, so that external sound can pass smoothly and enter the pickup 222. In this embodiment, the top cover 212 and the circuit board 221 are positioned by using the same set of positioning structures to reduce assembly errors, reduce the offset between the axis of the first sound inlet hole 2121a and the axis of the second sound inlet hole 221a, and more easily achieve complete or nearly coincidence of the axis of the first sound inlet hole 2121a and the axis of the second sound inlet hole 221a, thereby improving the sound pickup effect of the pickup 222.
[0091] In order to firmly connect the top cover 212 and the base 211 together and prevent the top cover 212 from falling off and causing the pickup assembly 220 to fall out of the receiving groove 211a, the top cover 212 and the base 211 can be connected and fixed by fasteners.
[0092] In one embodiment, please refer to Figure 5 The base 211 is provided with a connecting hole 2111a, which is coaxially arranged with the second positioning hole 2112a, and the connecting hole 2111a extends from the side of the groove bottom wall 2111 away from the receiving groove 211a toward the second positioning column 2122 until it is connected with the second positioning hole 2112a. The connecting hole 2111a is connected with the second positioning hole 2112a to penetrate the groove bottom wall 2111 and the second positioning column 2122. The connecting hole 2111a can be provided with a thread or directly be a through hole.
[0093] The first positioning column 2112 is provided with a threaded hole 2122a extending along its axial direction. During the assembly process, after the first positioning column 2112 of the top cover 212 is inserted into the second positioning hole 2112a of the second positioning column 2122, a fastening screw 201 can be arranged to pass through the connecting hole 2111a and extend into the threaded hole 2122a of the first positioning column 2112 to be screwed together, thereby firmly connecting the top cover 212 and the base 211.
[0094] Please continue to refer to Figure 5 In one embodiment, the thickness of the seal 230 is greater than the height of the first positioning column 2112 protruding from the bottom wall 2111 of the groove. The seal 230 can lift the circuit board 221 to the side of the first positioning column 2112 away from the bottom wall 2111 of the groove, so that a gap is formed between the circuit board 221 and the first positioning column 2112.
[0095] It should be noted that the thickness of the sealing member 230 is greater than the height of the first positioning column 2112 protruding from the bottom wall 2111 of the groove, which means that after the sealing member 230 is assembled between the circuit board 221 and the bottom wall 2111 of the groove, the thickness of the sealing member 230 is greater than the height of the first positioning column 2112 protruding from the bottom wall 2111 of the groove. Since the sealing member 230 is a flexible material and can produce flexible deformation under the action of external force, the thickness of the sealing member 230 before assembly needs to be provided with sufficient margin, so that after the sealing member 230 is clamped and compressed by the circuit board 221 and the bottom wall 2111, its thickness after compression is still greater than the height of the first positioning column 2112 protruding from the bottom wall 2111 of the groove.
[0096] Then, in this embodiment, the sealing member 230 supports the circuit board 221 so that a gap is formed between the circuit board 221 and the first positioning column 2112. That is to say, the circuit board 221 and the first positioning column 2112 do not contact each other, and the circuit board 221 is actually only supported by the sealing member 230, so that there is no rigid connection between the circuit board 221 and the base 211, which can prevent bottom noise from being transmitted to the circuit board 221 through the base 211 (first positioning column 2112), and further prevent noise from being transmitted to the microphone 222 through the circuit board 221 and interfering with the sound collection of the microphone 222, which can further improve the effect of isolating bottom noise and further reduce the influence of the noise of the sweeping robot's own work on the microphone 222.
[0097] In one embodiment, please refer to Figure 2 and Figure 3 The voice module 200 further includes a waterproof breathable membrane 240, which is disposed between the circuit board 221 and the top wall 2121, and one end of the waterproof breathable membrane 240 covers the first sound inlet hole 2121a, and the other end of the waterproof breathable membrane 240 covers the second sound inlet hole 221a. The number of the waterproof breathable membranes 240 is the same as the number of the microphones 222.
[0098] The waterproof and breathable membrane 240 is a sealing structure that is waterproof but sound-permeable. Figure 2 As shown, the waterproof and breathable membrane 240 includes sealing cotton (not marked) and a breathable film (not marked) arranged in the sealing cotton, wherein the sealing cotton has waterproof and sound insulating properties, the sealing cotton can be arranged in a hollow cylindrical shape, a sound hole is formed in the middle of the sealing cotton, and the breathable film is arranged in the sound hole, the breathable film can allow sound to pass through and block water vapor.
[0099] By arranging a waterproof breathable membrane 240 between the top wall 2121 and the circuit board 221, the first sound inlet 2121a is connected to the second sound inlet 221a through the waterproof breathable membrane 240, so that the second sound inlet 221a can be waterproofly sealed, preventing external water vapor from entering the pickup 222 through the first sound inlet 2121a and the second sound inlet 221a, thereby preventing the pickup 222 from being corroded and damaged. In addition, the waterproof breathable membrane 240 isolates the top wall 2121 from the circuit board 221, thereby preventing the noise transmitted from the sweeping robot to the mounting seat 210 from being transmitted to the circuit board 221 through the top wall 2121, thereby preventing the noise from being transmitted to the pickup 222 through the circuit board 221 and interfering with the sound collection of the pickup 222, thereby improving the sound pickup effect of the pickup 222.
[0100] In order to clamp the sealing member 230 between the circuit board 221 and the groove bottom wall 2111, in one embodiment, please refer to Figure 5 A convex rib 2123 is disposed on one side of the top wall 2121 facing the groove bottom wall 2111 , and the convex rib 2123 abuts against the circuit board 221 to hold the circuit board 221 against the sealing member 230 .
[0101] It can be understood that since the seal 230 is arranged between the circuit board 221 and the groove bottom wall 2111 by interference fitting, the seal 230 will generate a reverse extrusion force on the circuit board 221 after being clamped and compressed. The extrusion force continuously acts on the circuit board 221 to push the circuit board 221 upward, which will cause extrusion on the waterproof breathable membrane 240.
[0102] In this embodiment, a convex rib 2123 is provided on the side of the top wall 2121 facing the groove bottom wall 2111, and the circuit board 221 abuts against the convex rib 2123 under the support of the sealing member 230. The convex rib 2123 can limit the circuit board 221 to prevent the circuit board 221 from being excessively lifted up under the action of the extrusion force, so that a certain distance is formed between the circuit board 221 and the top wall 2121, thereby preventing the waterproof breathable membrane 240 from being excessively squeezed by the circuit board 221, and reducing the squeezing force of the circuit board 221 on the waterproof breathable membrane 240, thereby preventing the waterproof breathable membrane 240 from being excessively squeezed and deformed, thereby causing poor sound pickup by the microphone 222 (deformation of the waterproof breathable membrane 240 will cause deformation of the sound channel between the first sound inlet hole 2121a and the second sound inlet hole 221a, thereby affecting sound transmission).
[0103] The assembly process of the voice module 200 is described below:
[0104] First, stick the waterproof breathable membrane 240 on the surface of the circuit board 221 (the side without the pickup 222), then pass the second positioning column 2122 of the top cover 212 through the first positioning hole 221b of the circuit board 221, so that the top cover 212 and the circuit board 221 are positioned and matched together, then install the seal 230 into the accommodating groove 211a of the base 211, and then insert the second positioning column 2122 of the top cover 212 into the second positioning hole 2112a of the first positioning column 2112 on the base 211. At this time, the top cover 212, the circuit board 221, the seal 230 and the base 211 are connected as a whole, and finally the fastening screw 201 is passed through the connecting hole 2111a of the base 211 and threadedly connected with the threaded hole 2122a of the top cover 212. At this time, the seal 230 is compressed and deformed under the clamping of the circuit board 221 and the bottom wall 2111 of the groove, so that the overall connection is tightened, thereby completing the overall assembly of the voice module 200.
[0105] It is understandable that as the sweeping robot products on the market become more and more homogeneous, the appearance of the sweeping robot has gradually become an important criterion for users to choose a sweeping robot. A sweeping robot with a beautiful appearance is more likely to be liked by users. In this regard, in one embodiment, please refer to Figure 3 and Figure 4 The voice module 200 further includes a decorative sheet 250, which is connected to a side of the top wall 2121 away from the receiving groove 211a. The decorative sheet 250 can be bonded to the top wall 2121 by glue.
[0106] The decorative sheet 250 can be made of glass, metal, ceramic or other materials with good texture, and a decorative pattern can also be provided on the surface of the decorative sheet 250. By further providing the decorative sheet 250 on the side of the top wall 2121 of the mounting seat 210 away from the receiving groove 211a (i.e., the surface of the top cover 212), the aesthetics of the voice module 200 and the cleaning robot can be increased.
[0107] Please combine Figure 3 , Figure 4 And refer to Figure 6 , Figure 6 2 is a top view of the voice module of the embodiment of the utility model. A boss 2124 is provided on the side of the top wall 2121 away from the receiving groove 211a, and the first sound inlet hole 2121a passes through the boss 2124 and the top wall 2121; a first notch 250a is provided on the outer periphery of the decorative sheet 250 so that the boss 2124 passes through the first notch 250a. The number of bosses 2124 and the number of first notches 250a are the same as the number of first sound inlet holes 2121a.
[0108] It can be understood that the boss 2124 is passed through the first notch 250a. In other words, the decorative sheet 250 is surrounded by the boss 2124 through the first notch 250a, so that the boss 2124 and the first notch 250a can be positioned and matched, and the decorative sheet 250 can be quickly connected to the top wall 2121, thereby improving the assembly efficiency; and the boss 2124 can limit the decorative sheet 250, so that the decorative sheet 250 can be firmly connected to the top wall 2121, preventing the decorative sheet 250 from being easily separated from the bottom wall due to external force.
[0109] It should also be noted that, in this embodiment, by providing a boss 2124 on the top wall 2121 and a first notch 250a on the decorative sheet 250, compared with directly covering the decorative sheet 250 on the surface of the top wall 2121 and opening a hole in the decorative sheet 250 to communicate with the first sound inlet hole 2121a, when connecting the decorative sheet 250, the positioning and matching of the boss 2124 and the first notch 250a makes it easier to control the assembly accuracy of the decorative sheet 250, and can avoid the situation in which the decorative sheet 250 blocks the first sound inlet hole 2121a due to manufacturing and assembly errors during the assembly process, thereby affecting the sound pickup. In addition, the first sound inlet hole 2121a is provided on the boss 2124, and the boss 2124 is penetrated in the first notch 250a, so that the external sound does not need to pass through the decorative sheet 250, but directly enters the pickup 222 through the first sound inlet hole 2121a, which can ensure the sound pickup effect.
[0110] The present application also provides a cleaning device, which includes the voice module 200 of any of the above embodiments. Specifically, the cleaning device provided by the present application can be a sweeping robot, a sweeping and mopping machine, a mopping robot, a floor washing robot, etc. The sweeping robot is used as an example for explanation below.
[0111] Please refer to Figure 7 , Figure 7 The schematic diagram of the structure of the cleaning device of the embodiment of the utility model is shown in FIG. The cleaning device 10 includes a housing 100, and a voice module 200 is installed on the housing 100. The voice module 200 can be connected to the control mainboard inside the cleaning device 10, and the control mainboard receives the voice data sent by the voice module 200 to identify the voice command issued by the user, thereby controlling the cleaning device 10 to perform the corresponding functional operation, so that the cleaning device 10 has a voice control function.
[0112] According to the cleaning device 10 provided by the utility model, by adopting the voice module 200 conceived in the above embodiment, the voice module 200 includes a sound pickup component 220 and a mounting seat 210, the sound pickup component 220 is arranged in a receiving groove 211a of the mounting seat 210, and the mounting seat 210 is provided with a first sound input hole 2121a connected to the receiving groove 211a, the sound pickup component 220 can collect sound through the first sound input hole 2121a, so that the cleaning device 10 can realize the voice control function. The voice module 200 also includes a seal 230. By arranging the seal 230 between the sound pickup component 220 and the housing 100, the seal 230 has a blocking effect on the sound transmitted from the bottom of the mounting base 210 (that is, the sound transmitted from the inside of the cleaning device 10), which can reduce the noise transmitted to the sound pickup component 220 through the mounting base 210, and improve the problem of the working noise of the cleaning device 10 itself interfering with the sound pickup component 220 in collecting voice commands, so that the sound pickup component 220 can collect clear voice commands, so that the cleaning device 10 can accurately perform the corresponding functional operations, thereby improving the voice control effect and improving the user experience.
[0113] In one implementation, the cleaning device 10 may further include a ranging radar. It is understandable that the ranging radar is equivalent to the "eyes" of the cleaning device 10. The ranging radar can transmit signals outward and receive reflected signals reflected back by external obstacles, and can measure the distance between the cleaning device 10 and the external obstacles, thereby controlling the movement of the cleaning device 10 to prevent the cleaning device 10 from colliding.
[0114] Please refer to Figure 1 , Figure 3 and Figure 7 In one embodiment, the mounting seat 210 is further provided with a mounting groove 211b, which is arranged on a side of the groove bottom wall 2111 away from the accommodating groove 211a, and the ranging radar is arranged in the mounting groove 211b.
[0115] The ranging radar may be a laser radar, and the mounting seat 210 may also be provided with a window (not shown) connected to the mounting groove 211b for the laser signal emitted by the laser radar to pass through.
[0116] Then, in this embodiment, by further providing a mounting groove 211b on the mounting base 210 and disposing the ranging radar in the mounting groove 211b, the ranging radar and the voice module 200 are integrated in one module, which can facilitate the overall assembly of the sweeping robot.
[0117] Moreover, in this embodiment, the installation groove 211b is arranged on the side of the groove bottom wall 2111 away from the receiving groove 211a, that is, the installation groove 211b is arranged at intervals on the lower side of the receiving groove 211a, that is, the ranging radar is arranged on the lower side of the sound pickup component 220, and the ranging radar is closer to the cleaning robot housing 100. Then, during the cleaning operation of the cleaning robot, the noise generated by it will be transmitted upward through the installation groove 211b first, and will be blocked to a certain extent by the ranging radar, which can weaken the intensity of the noise. Then, when the weakened noise continues to be transmitted upward to the receiving groove 211a, it is blocked by the sealing member 230 for sound insulation, which further improves the problem of the cleaning robot's own noise interfering with the sound collection of the microphone 222, and can significantly improve the sound pickup effect.
[0118] Please combine Figure 7 And refer to Figure 8 , Figure 8 The schematic diagram of the cleaning device of the embodiment of the utility model is shown in the state where the flip cover is in a rotating state. The housing 100 comprises a first surface 100a, and the first surface 100a is provided with an opening (not shown).
[0119] A storage box may be provided in the cleaning device 10, for example, the storage box may be a dust collection box to collect dust, debris and impurities swept by the sweeping robot. It is understandable that when the cleaning device 10 is a sweeping and mopping machine, a mopping robot, or a floor washing robot, the storage box may also be used as a clean water box, a sewage box, etc.
[0120] By providing an opening on the first surface 100a, it is convenient for the user to take out the storage box from the opening, so that the user can regularly clean or otherwise process the storage box.
[0121] In one embodiment, the cleaning device 10 further includes a flip cover 110. Figure 8 As shown, the flip cover 110 is rotatably connected to the first surface 100a to cover or expose the above-mentioned opening. Specifically, when the flip cover 110 closes the opening, the storage box can be sealed inside the cleaning device 10 to prevent the medium stored in the storage box from leaking out. When the flip cover 110 is rotated to expose the opening, it is convenient for the user to take the storage box out of the opening.
[0122] Then, by setting the flip cover 110 to be rotatably connected to the housing 100, when the user needs to take out the storage box, the flip cover 110 can be rotated to a certain angle. The user does not need to manually remove the flip cover 110, which can facilitate user operation.
[0123] Since the ranging radar has a detection blind spot, in order to ensure the accuracy and reliability of the ranging radar detection, the ranging radar needs to be set at a certain distance from the side of the housing 100. In one embodiment, the ranging radar is configured as follows: the minimum distance from the center of the radar to the side of the housing 100 is 10-14 cm.
[0124] Then, in order to set the radar at the above position, the mounting base 210 needs to be installed in the middle area close to the first surface 100a, and cannot be installed close to the outer edge of the first surface 100a.
[0125] Since the mounting seat 210 needs to be installed in the middle area close to the first surface 100a, and the flip cover 110 also needs to occupy a larger area of the first surface 100a, in order to take into account the assembly of the mounting seat 210 and the flip cover 110, in one embodiment, a second notch 110a is provided at one end of the flip cover 110 that is rotatably connected to the first surface 100a, and the mounting seat 210 is inserted into the second notch 110a. The shape of the second notch 110a is adapted to the outer contour of the mounting seat 210.
[0126] like Figure 8 As shown, the mounting seat 210 is inserted into the second notch 110a, or in other words, one end of the flip cover 110 that is rotatably connected to the housing 100 is surrounded by the mounting seat 210 through the second notch 110a, so that the rotation axis of the flip cover 110 can pass through the mounting seat 210. Then, through the above arrangement, the mounting seat 210 and the flip cover 110 can share a part of the first surface 100a in this embodiment, so that the mounting seat 210 can be installed at the position required by the ranging radar, and sufficient area can be left on the first surface 100a to set the flip cover 110, so that the assembly of the mounting seat 210 and the flip cover 110 is achieved, and the housing 100 does not need to be set larger, thereby avoiding increasing the overall volume of the cleaning device 10.
[0127] Please refer to reference 3 and Figure 8 In one embodiment, the mounting base 210 includes a top cover 212, and the outer periphery of the top cover 212 includes a first outer peripheral surface 2125, and the distance from the first outer peripheral surface 2125 to the center line of the top cover 212 decreases from one end of the first outer peripheral surface 2125 close to the outer shell 100 to the end away from the outer shell 100.
[0128] The distance between the first outer peripheral surface 2125 and the center line of the top cover 212 decreases from the end of the first outer peripheral surface 2125 close to the housing 100 to the end away from the housing 100, that is, the first outer peripheral surface 2125 is designed as an inclined surface, so when the flip cover 110 rotates, a clearance space is formed on one side of the first outer peripheral surface 2125 to allow the flip cover 110 to rotate smoothly, thereby avoiding interference between the flip cover 110 and the top cover 212. In this way, the distance between the second notch 110a and the outer side wall of the mounting seat 210 can be designed to be smaller, thereby reducing the gap between the two and improving the appearance of the cleaning device 10.
[0129] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.
Claims
1. Voice module, characterized in that: Applied to cleaning equipment, the voice module includes: A mounting seat, provided with a receiving groove, the mounting seat comprising a top wall provided on one side of the receiving groove, the top wall being provided with a first sound inlet hole, the first sound inlet hole being communicated with the receiving groove, and the mounting seat being installed on the housing of the cleaning device; A sound pickup assembly is disposed in the receiving groove, and the sound pickup assembly collects sound through the first sound inlet hole; and A sealing member is located in the receiving groove and is arranged between the sound pickup assembly and the housing.
2. The voice module according to claim 1, characterized in that: The mounting seat comprises a groove bottom wall forming the accommodating groove, the groove bottom wall is arranged relatively and spaced apart from the top wall, and the sealing member is connected between the pickup assembly and the groove bottom wall.
3. The voice module according to claim 2, characterized in that: The pickup assembly includes a circuit board and a pickup, the pickup is connected to a side of the circuit board facing the bottom wall of the slot, the circuit board is provided with a second sound inlet hole, the second sound inlet hole penetrates the circuit board along the thickness direction of the circuit board and is connected to the pickup hole of the pickup; The sealing member is clamped between the circuit board and the bottom wall of the slot, and the sealing member can be flexibly deformed to cover the pickup.
4. The voice module according to claim 3, characterized in that: The circuit board is provided with a first positioning hole penetrating the circuit board along the thickness direction of the circuit board; The mounting seat comprises: A base, provided with the receiving groove and the groove bottom wall, the groove bottom wall is provided with a first positioning column on a side facing the receiving groove, and the first positioning column is provided with a second positioning hole; and A top cover is connected to the base and seals the circuit board and the seal in the accommodating groove. A second positioning column is provided on the side of the top cover facing the base. The second positioning column passes through the first positioning hole and is inserted into the second positioning hole.
5. The voice module according to claim 4, characterized in that: The thickness of the sealing member is greater than the height of the first positioning column protruding from the bottom wall of the groove. The sealing member can lift the circuit board to the side of the first positioning column away from the bottom wall of the groove, so that a gap is formed between the circuit board and the first positioning column.
6. The voice module according to any one of claims 1 to 5, characterized in that: The material of the sealing member is a sound insulation material, and the material of the sealing member includes one or more of sponge, rubber, and silicone.
7. The voice module according to any one of claims 3 to 5, characterized in that: The voice module also includes a waterproof breathable membrane, which is arranged between the circuit board and the top wall, and one end of the waterproof breathable membrane covers the first sound inlet hole, and the other end of the waterproof breathable membrane covers the second sound inlet hole.
8. The voice module according to any one of claims 3 to 5, characterized in that: A convex rib is provided on one side of the top wall facing the groove bottom wall, and the convex rib abuts against the circuit board to hold the circuit board against the sealing member.
9. The voice module according to any one of claims 1 to 5, characterized in that: A boss is provided on one side of the top wall away from the receiving groove, and the first sound inlet hole passes through the boss and the top wall; The voice module also includes a decorative sheet, which is connected to a side of the top wall away from the receiving groove, and a first notch is provided on the outer periphery of the decorative sheet so that the boss passes through the first notch.
10. A cleaning device, characterized in that It comprises a housing and a voice module according to any one of claims 1 to 9, wherein the voice module is installed in the housing.
11. The cleaning device according to claim 10, characterized in that The mounting seat is provided with a mounting groove, and the mounting groove is arranged on a side of the groove bottom wall away from the accommodating groove; The cleaning device also includes a ranging radar, which is arranged in the installation groove.
12. The cleaning device according to claim 10, characterized in that The housing comprises a first surface, and the first surface is provided with an opening; the cleaning device further comprises a flip cover, the flip cover is rotatably connected to the first surface to cover or reveal the opening, and one end of the flip cover rotatably connected to the first surface is provided with a second notch; The mounting seat is connected to the outer shell and penetrates the second notch. The mounting seat includes a top cover. The outer periphery of the top cover includes a first outer peripheral surface. The distance from the first outer peripheral surface to the center line of the top cover decreases from one end of the first outer peripheral surface close to the outer shell to the other end away from the outer shell.