Microphone, voice structure and electric heater

Abstract

The invention provides a microphone, a voice structure and an electric heater. The microphone comprises a sound receiving part and a first limiting part. The sound receiving part is installed on the installation body and is in limiting fit with the installation body so as to limit the sound receiving part to move in the radial direction. The first limiting part is arranged on the sound receiving part and is in limiting fit with the mounting body so as to limit the sound receiving part to move in the axial direction of the sound receiving part. According to the microphone, radial limiting of the sound receiving part is achieved through limiting cooperation of the sound receiving part and the mounting body, axial limiting of the sound receiving part is achieved through limiting cooperation of the first limiting part and the mounting body, it is guaranteed that the microphone can be stably and reliably mounted on the mounting body, it is guaranteed that the microphone cannot incline after being mounted, and the sound receiving effect of the microphone is improved. Besides, the microphone is directly mounted on the mounting body and does not depend on interference crimping of crimping bosses on parts such as the shell, so that the problem of microphone deviation caused by part sizes, mounting modes and the like is effectively avoided, and the reliability of the microphone, the voice structure and the electric heater is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent voice home appliances, and in particular to a microphone, a voice structure and an electric heater. Background Art

[0002] At present, some home appliances have added offline voice functions, and the circular microphone components used are used to receive voice commands issued by people. For products, the higher the reception and recognition rate of voice commands, the better the effect. However, the home appliances in the prior art have poor microphone sound reception effect. Summary of the invention

[0003] Based on this, it is necessary to provide a microphone, a voice structure and an electric heater to address the problem of poor microphone sound reception in household appliances in the prior art.

[0004] The technical solution is as follows:

[0005] In a first aspect, a microphone is provided, which is mounted on a mounting body, and the microphone comprises:

[0006] A sound receiving part is mounted on the mounting body and cooperates with the mounting body to limit the movement of the sound receiving part along its radial direction;

[0007] The first limiting portion is arranged on the sound receiving portion and cooperates with the mounting body to limit the movement of the sound receiving portion along its own axial direction.

[0008] The technical solution is further described below:

[0009] In one embodiment, the number of the first limiting portion is at least one, and each of the first limiting portions is arranged on the sound receiving portion at intervals along the circumference of the sound receiving portion, and each of the first limiting portions cooperates with the mounting body in a limiting manner.

[0010] In the second aspect, a voice structure is provided, including a mounting body and the microphone, the mounting body being provided with a second limiting portion and a third limiting portion, the second limiting portion being cooperated with the sound receiving portion to limit the radial movement of the sound receiving portion, the third limiting portion being cooperated with the first limiting portion to limit the axial movement of the sound receiving portion.

[0011] In one embodiment, the first limiting portion is arranged on the outer side wall of the sound receiving portion, and the second limiting portion includes at least two first limiting protrusions, each of which is arranged at intervals along the circumference of the sound receiving portion, and each of the first limiting protrusions cooperates with the sound receiving portion to limit the radial movement of the sound receiving portion, and two adjacent first limiting protrusions cooperate to form an avoidance opening for avoiding the first limiting portion.

[0012] In one embodiment, there are two first limiting protrusions, both of which extend along the circumference of the sound receiving part and are respectively located on two opposite sides of the sound receiving part, and at least one limiting rib is provided on each side of the two first limiting protrusions close to each other, and each of the limiting ribs is arranged along the circumference of the sound receiving part and cooperates with the sound receiving part to limit the position.

[0013] In one embodiment, each of the limiting ribs extends along the axial direction of the sound receiving portion, and each of the limiting ribs is provided with a first guide surface on a side away from the mounting body.

[0014] In one embodiment, the first limiting portion is configured as a second limiting protrusion, and the third limiting portion includes at least two elastic clips, each of which is respectively arranged on opposite sides of the second limiting protrusion and cooperates with the mounting body to limit the axial movement of the second limiting protrusion along the sound receiving part.

[0015] In one of the embodiments, each of the elastic buckles is provided with a reinforcing rib on a side away from the second limiting protrusion, and each of the reinforcing ribs is connected to the mounting body.

[0016] In one embodiment, the microphone further includes a wire connected to the sound receiving part, and the mounting body includes a fixing part, and the fixing part is fixedly connected to an end of the wire close to the sound receiving part.

[0017] In one embodiment, the second limiting portion is provided with a wire passing hole, and the mounting body is further provided with a wire passing groove connected to the wire passing hole, the wire passing groove is located between the fixing portion and the second limiting portion, and one end of the wire passes through the fixing portion, the wire passing groove and the wire passing hole in sequence and is connected to the sound receiving portion.

[0018] In one embodiment, the fixing portion is configured as a wire buckle, and the mounting body is further provided with a first protrusion and a second protrusion, the first protrusion and the second protrusion are spaced apart on both sides of the wire hole along the circumference of the sound receiving portion, the first protrusion, the second protrusion and the mounting body located between the first protrusion and the second protrusion are arranged to form the wire passing groove, the wire buckle is located on one side of the wire passing groove, and is connected to an end of the first protrusion away from the second limiting portion.

[0019] In a third aspect, an electric heater is provided, comprising the voice structure.

[0020] When the microphone, voice structure and electric heater in the above-mentioned embodiments are used, the sound receiving part and the mounting body limit position cooperate to achieve radial limit of the sound receiving part, and the first limit position cooperates with the mounting body limit position to achieve axial limit of the sound receiving part, so as to ensure that the microphone can be stably and reliably installed on the mounting body, and ensure that the microphone will not tilt after installation, thereby improving the sound receiving effect of the microphone, voice structure and electric heater. In addition, the microphone is directly installed on the mounting body, and no longer relies on the interference crimping of the crimping boss on the shell and other parts, which effectively avoids the problem of microphone deviation caused by part size, installation method, etc., and improves the reliability of the microphone, voice structure and electric heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 FIG. 4 is a schematic diagram of the structure of a microphone according to an embodiment of the present invention.

[0024] Figure 2 A structural diagram of a speech structure of an embodiment.

[0025] Figure 3 for Figure 2 A partial enlarged view of part A.

[0026] Figure 4 for Figure 2 Schematic diagram of the structure of the installation body.

[0027] Figure 5 for Figure 4 A partial enlarged view of part B.

[0028] Description of reference numerals:

[0029] 10. Voice structure; 100. Microphone; 110. Sound receiving part; 120. First limiting part; 121. Second limiting protrusion; 130. Wire; 200. Mounting body; 210. Second limiting part; 211. First limiting protrusion; 212. Avoidance; 213. Limiting rib; 214. Wire hole; 220. Third limiting part; 221. Elastic buckle; 222. Reinforcing rib; 230. Sound receiving hole; 240. Fixing part; 241. Wire buckle; 250. Wire groove; 251. First protrusion; 252. Second protrusion. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0031] For household appliances with poor microphone sound reception, the inventors have found through testing and analysis that for the microphone itself, the best voice effect is achieved when the structure does not form a cavity during assembly and the installation direction is not skewed. The installation method of the microphone in the prior art is: after placing the microphone in the installation slot on the body, the body with the microphone is installed on another shell, which has a threading hole and abutment boss. When the body with the microphone is installed on the shell, the wire of the microphone must be manually pulled to the inside of the shell; then the buckle on the body is fastened to the shell, so that the boss on the shell abuts the back of the microphone, and the microphone is pressed by interference fit.

[0032] During the entire installation process, there are the following problems, which will cause the microphone's voice effect to be poor.

[0033] 1. The microphone may be tilted when installed, resulting in poor sound reception.

[0034] 2. The process of pulling the wire may cause the microphone to be installed at an angle, resulting in poor reception.

[0035] 3. Since the buckle on the main body and the buckle platform on the shell have certain deformation and dimensional tolerance, it is possible that the microphone and the boss cannot fit tightly, resulting in poor sound reception.

[0036] Based on the above problems, the inventors have designed and proposed the microphone 100, the voice structure 10 and the electric heater of the following embodiments of the present application to solve the above technical problems.

[0037] like Figure 1 and Figure 2As shown, in one embodiment, a microphone 100 is provided, which is mounted on a mounting body 200. The microphone 100 includes a sound receiving portion 110 and a first position limiting portion 120. The sound receiving portion 110 is mounted on the mounting body 200 and is limited in position with the mounting body 200 to limit the sound receiving portion 110 from moving in its radial direction. The first position limiting portion 120 is disposed on the sound receiving portion 110 and is limited in position with the mounting body 200 to limit the sound receiving portion 110 from moving in its axial direction.

[0038] When the microphone 100 in the above embodiment is used, the sound receiving part 110 is limited in radial direction by the cooperation between the sound receiving part 110 and the mounting body 200, and the first limiting part 120 is limited in axial direction by the cooperation between the sound receiving part 110 and the mounting body 200, so as to ensure that the microphone 100 can be stably and reliably installed on the mounting body 200, and ensure that the microphone 100 will not tilt after installation, thereby improving the sound receiving effect of the microphone 100. In addition, the microphone 100 is directly installed on the mounting body 200, and no longer relies on the interference crimping of the crimping boss on the shell and other parts, which effectively avoids the problem of microphone 100 displacement caused by part size, installation method, etc., and improves the reliability of the microphone 100.

[0039] The sound receiving unit 110 can be configured as any structure in the prior art that can receive voice commands. The shape of the sound receiving unit 110 can be flexibly adjusted according to the needs of actual use. Specifically in this embodiment, the sound receiving unit 110 is configured in a cylindrical shape. In other embodiments, when the sound receiving unit 110 can also be configured in a non-cylindrical shape, the radial direction of the sound receiving unit 110 is a direction perpendicular to the axial direction of the sound receiving unit 110.

[0040] The first limiting portion 120 can be configured as a limiting block, a limiting groove or other limiting structures. The number and installation position of the first limiting portion 120 can be flexibly adjusted according to actual use needs. For example, the number of the first limiting portion 120 can be one, two or four.

[0041] like Figure 2 As shown, specifically in this embodiment, when the mounting body 200 is placed vertically, the sound receiving part 110 cooperates with the mounting body 200 to limit the freedom of the sound receiving part 110 in four directions: up, down, left and right; the first limiting part 120 cooperates with the mounting body 200 to limit the freedom of the sound receiving part 110 in two directions: front and back.

[0042] like Figure 1As shown, optionally, the number of the first limiting parts 120 is at least one, and each of the first limiting parts 120 is arranged on the sound receiving part 110 at intervals along the circumference of the sound receiving part 110, and all of them are limited and matched with the mounting body 200. In this way, by increasing the number of the first limiting parts 120, the limiting area between the first limiting parts 120 and the mounting body 200 is increased, and the limiting surface distribution is more uniform, ensuring that the sound receiving part 110 will not tilt, thereby improving the reliability of the microphone 100.

[0043] like Figure 1 , Figure 2 and Figure 3 As shown, in one embodiment, a voice structure 10 is provided, comprising a mounting body 200 and a microphone 100 in any of the above embodiments. The mounting body 200 is provided with a second limiting portion 210 and a third limiting portion 220. The second limiting portion 210 is limitedly matched with the sound receiving portion 110 to limit the sound receiving portion 110 from moving in its radial direction. The third limiting portion 220 is limitedly matched with the first limiting portion 120 to limit the sound receiving portion 110 from moving in its axial direction.

[0044] When the speech structure 10 in the above embodiment is used, the sound receiving part 110 is limited in radial direction by the cooperation between the sound receiving part 110 and the second limiting part 210 on the mounting body 200, and the sound receiving part 110 is limited in axial direction by the cooperation between the first limiting part 120 and the third limiting part 220 on the mounting body 200, so as to ensure that the microphone 100 can be stably and reliably installed on the mounting body 200, and ensure that the microphone 100 will not tilt after installation, thereby improving the sound receiving effect of the microphone 100. In addition, the microphone 100 is directly installed on the mounting body 200 through the second limiting part 210 and the third limiting part 220, and no longer relies on the interference crimping of the crimping boss on the shell and other parts, which effectively avoids the problem of microphone 100 displacement caused by part size, installation method, etc., and improves the reliability of the speech structure 10.

[0045] The first limiting portion 210 can be configured as any structure in the prior art that can limit the sound receiving portion 110 to move along its own radial direction. The third limiting portion 220 and the first limiting portion 120 can be configured as any structure in the prior art that can limit the sound receiving portion 110 to move along its own axial direction relative to the mounting body 200.

[0046] like Figure 1 and Figure 3As shown, further, the first limiting portion 120 is arranged on the outer side wall of the sound receiving portion 110. The second limiting portion 210 includes at least two first limiting protrusions 211, and each first limiting protrusion 211 is arranged at intervals along the circumference of the sound receiving portion 110. Each first limiting protrusion 211 is limitedly matched with the sound receiving portion 110 to limit the sound receiving portion 110 from moving along its own radial direction. Two adjacent first limiting protrusions 211 cooperate to form an avoidance opening 212 for avoiding the first limiting portion 120.

[0047] Specifically in this embodiment, the number of the avoidance openings 212 is the same as the number of the first limiting portions 120. Each first limiting portion 120 is provided corresponding to each avoidance opening 212. The first limiting portion 120 and the inner wall of the corresponding avoidance opening 212 cooperate with each other along the circumferential limit of the sound receiving portion 110. In this way, the second limiting portion 210 can limit the translation of the sound receiving portion 110 on the mounting body 200, and can also limit the rotation of the sound receiving portion 110 around its own axis, thereby improving the reliability of the voice structure 10.

[0048] like Figure 3 , Figure 4 and Figure 5 As shown, optionally, there are two first limiting protrusions 211, both of which extend along the circumference of the sound receiving part 110 and are respectively located on opposite sides of the sound receiving part 110. At least one limiting rib 213 is provided on the side where the two first limiting protrusions 211 are close to each other, and each limiting rib 213 is arranged along the circumference of the sound receiving part 110 and is limitedly matched with the sound receiving part 110. In this way, all the limiting ribs 213 are evenly distributed on the outer periphery of the sound receiving part 110, so that the radial force of the sound receiving part 110 is evenly distributed to ensure that the sound receiving part 110 will not tilt after installation, thereby improving the sound receiving effect of the voice structure 10.

[0049] Specifically in this embodiment, two first limiting protrusions 211 are arranged to form an installation space. Each limiting rib 213 is located in the installation space and is interference fit with the sound receiving part 110. The installation body 200 is also provided with a sound receiving hole 230, which is located between the two first limiting protrusions 211 and is connected to the installation space. The sound receiving hole 230 is configured to be arranged corresponding to the sound receiving part 110 when the sound receiving part 110 is installed in the installation space for voice reception. Specifically, the installation space is coaxially arranged with the sound receiving hole 230.

[0050] Specifically in this embodiment, each limiting rib 213 extends along the axial direction of the sound receiving part 110, and each limiting rib 213 is provided with a first guide surface on a side away from the mounting body 200. In this way, during assembly, the first guide surface can guide the sound receiving part 110, ensuring that the sound receiving part 110 can be smoothly installed in the installation space, thereby improving the convenience of assembling the voice structure 10.

[0051] The first guide surface can be configured as a guide inclined surface, a guide arc surface or a guide spherical surface.

[0052] like Figure 1 , Figure 3 and Figure 5 As shown, in one embodiment, the first limiting portion 120 is configured as a second limiting protrusion 121. The third limiting portion 220 includes at least two elastic buckles 221, each of which is respectively disposed on opposite sides of the second limiting protrusion 121, and cooperates with the mounting body 200 to limit the axial movement of the second limiting protrusion 121 along the sound receiving portion 110.

[0053] Specifically in this embodiment, each third position limiting portion 220 includes two elastic buckles 221. The two elastic buckles 221 are provided with a second guide surface on one side away from the installation body 200 and close to the installation space. The second protrusion 252 is provided with a third guide surface on both sides of the opposite end close to the installation body 200. The two second guide surfaces are arranged corresponding to the two third guide surfaces, so that the second position limiting protrusion 121 can be smoothly installed between the corresponding two elastic buckles 221.

[0054] like Figure 5 As shown, optionally, each elastic buckle 221 is provided with a reinforcing rib 222 on one side away from the second limiting protrusion 121, and each reinforcing rib 222 is connected to the mounting body 200. In this way, the reinforcing rib 222 can increase the strength of the elastic buckle 221 and improve the reliability of the voice structure 10.

[0055] like Figure 3 and Figure 5 As shown, in one embodiment, the microphone 100 further includes a wire 130 connected to the sound receiving part 110. The mounting body 200 includes a fixing part 240, and the fixing part 240 is fixedly connected to one end of the wire 130 close to the sound receiving part 110. In this way, the end of the wire 130 close to the sound receiving part 110 is fixed to the mounting body 200 through the fixing part 240, ensuring that the sound receiving part 110 will not be subjected to force when the wire 130 is pulled, thereby ensuring that the relative position between the sound receiving part 110 and the sound receiving hole 230 remains fixed, thereby improving the reliability of the voice structure 10.

[0056] The fixing portion 240 may be configured as any structure in the prior art that can fix the wire 130 on the mounting body 200 .

[0057] like Figure 3 and Figure 5As shown, further, the second limiting portion 210 is provided with a wire hole 214. The mounting body 200 is also provided with a wire groove 250 connected to the wire hole 214, and the wire groove 250 is located between the fixing portion 240 and the second limiting portion 210. One end of the wire 130 passes through the fixing portion 240, the wire groove 250 and the wire hole 214 in sequence and is connected to the sound receiving portion 110. In this way, the wire 130 between the fixing portion 240 and the sound receiving portion 110 can be hidden in the wire hole 214 and the wire groove 250, so as to avoid the wire 130 between the fixing portion 240 and the sound receiving portion 110 being pulled by external force and causing the sound receiving portion 110 to tilt, thereby improving the reliability of the voice structure 10.

[0058] like Figure 3 and Figure 5 As shown, optionally, the fixing portion 240 is provided with a wire buckle 241. The mounting body 200 is further provided with a first protrusion 251 and a second protrusion 252, and the first protrusion 251 and the second protrusion 252 are arranged at intervals on both sides of the wire hole 214 along the circumference of the sound receiving portion 110. The first protrusion 251, the second protrusion 252 and the mounting body 200 located between the first protrusion 251 and the second protrusion 252 are arranged to form a wire groove 250. The wire buckle 241 is located on one side of the wire groove 250 and is connected to an end of the first protrusion 251 away from the second limiting portion 210.

[0059] Specifically in this embodiment, the first limiting protrusion 211, the limiting rib 213, the elastic buckle 221, the reinforcing rib 222, the wire buckle 241, the first protrusion 251 and the second protrusion 252 are all integrally formed with the mounting body 200. The wire hole 214 is provided on either of the two first limiting protrusions 211.

[0060] In one embodiment, an electric heater is further provided, comprising the voice structure 10 in any of the above embodiments. Thus, the electric heater comprises the voice structure 10 and thus has all the advantages of the above voice structure 10.

[0061] It should be noted that this embodiment is described by taking the application of the voice structure 10 to an electric heater as an example. In other embodiments, the voice structure 10 can also be applied to other household appliances such as electric fans and sweepers.

[0062] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply 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 application.

[0063] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0064] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0065] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0066] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0067] It should also be understood that when explaining the connection relationship or positional relationship of elements, although not explicitly described, the connection relationship and positional relationship are interpreted as including an error range, which should be within the acceptable deviation range of a specific value determined by those skilled in the art. For example, "approximately", "approximately" or "substantially" may mean within one or more standard deviations, which are not limited here.

[0068] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A microphone, mounted on a mounting body (200), characterized in that: include: A sound receiving part (110) is mounted on the mounting body (200) and cooperates with the mounting body (200) to limit the movement of the sound receiving part (110) along its radial direction; The first limiting portion (120) is arranged on the sound receiving portion (110) and cooperates with the mounting body (200) to limit the movement of the sound receiving portion (110) along its own axial direction.

2. The microphone according to claim 1, characterized in that The number of the first limiting portions (120) is at least one, and each of the first limiting portions (120) is arranged on the sound receiving portion (110) at intervals along the circumference of the sound receiving portion (110), and each of the first limiting portions (120) cooperates with the mounting body (200) in limiting manner.

3. A speech structure, characterized in that: The invention comprises a mounting body (200) and the microphone (100) as claimed in claim 1 or 2, wherein the mounting body (200) is provided with a second limiting portion (210) and a third limiting portion (220), wherein the second limiting portion (210) cooperates with the sound receiving portion (110) to limit the sound receiving portion (110) from moving in its radial direction, and the third limiting portion (220) cooperates with the first limiting portion (120) to limit the sound receiving portion (110) from moving in its axial direction.

4. The speech structure according to claim 3, characterized in that: The first limiting portion (120) is arranged on the outer wall of the sound receiving portion (110), and the second limiting portion (210) includes at least two first limiting protrusions (211), each of which is arranged at intervals along the circumference of the sound receiving portion (110), and each of the first limiting protrusions (211) cooperates with the sound receiving portion (110) to limit the movement of the sound receiving portion (110) along its own radial direction, and two adjacent first limiting protrusions (211) cooperate to form an avoidance opening (212) for avoiding the first limiting portion (120).

5. The speech structure according to claim 4, characterized in that: There are two first limiting protrusions (211), both of which extend along the circumference of the sound receiving part (110) and are respectively located on two opposite sides of the sound receiving part (110), and at least one limiting rib (213) is provided on a side of the two first limiting protrusions (211) close to each other, and each of the limiting ribs (213) is arranged along the circumference of the sound receiving part (110) and cooperates with the sound receiving part (110) to limit the position.

6. The speech structure according to claim 5, characterized in that: Each of the limiting ribs (213) extends along the axial direction of the sound receiving portion (110), and each of the limiting ribs (213) is provided with a first guide surface on a side away from the installation body (200).

7. The speech structure according to claim 3, characterized in that: The first limiting portion (120) is configured as a second limiting protrusion (121), and the third limiting portion (220) comprises at least two elastic buckles (221), each of the elastic buckles (221) being respectively arranged on two opposite sides of the second limiting protrusion (121) and cooperating with the mounting body (200) to limit the axial movement of the second limiting protrusion (121) along the sound receiving portion (110).

8. The speech structure according to claim 7, characterized in that: A reinforcing rib (222) is provided on one side of each of the elastic buckles (221) away from the second limiting protrusion (121), and each of the reinforcing ribs (222) is connected to the mounting body (200).

9. The speech structure according to any one of claims 3 to 8, characterized in that: The microphone (100) further comprises a wire (130) connected to the sound receiving part (110), and the mounting body (200) comprises a fixing part (240), wherein the fixing part (240) is fixedly connected to an end of the wire (130) close to the sound receiving part (110).

10. The speech structure according to claim 9, characterized in that: The second limiting portion (210) is provided with a wire passing hole (214), and the mounting body (200) is further provided with a wire passing groove (250) connected to the wire passing hole (214), and the wire passing groove (250) is located between the fixing portion (240) and the second limiting portion (210), and one end of the wire (130) passes through the fixing portion (240), the wire passing groove (250) and the wire passing hole (214) in sequence and is connected to the sound receiving portion (110).

11. The speech structure according to claim 10, characterized in that: The fixing portion (240) is configured as a wire buckle (241), and the mounting body (200) is further provided with a first protrusion (251) and a second protrusion (252), the first protrusion (251) and the second protrusion (252) being arranged at intervals on both sides of the wire hole (214) along the circumference of the sound receiving portion (110), the first protrusion (251), the second protrusion (252) and the mounting body (200) located between the first protrusion (251) and the second protrusion (252) forming the wire groove (250), the wire buckle (241) being located at one side of the wire groove (250) and being connected to an end of the first protrusion (251) away from the second limiting portion (210).

12. An electric heater, characterized in that: Comprising a speech structure (10) as claimed in any one of claims 3 to 11.

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