WO2020147538A1

WO2020147538A1 - Electronic product

Info

Publication number: WO2020147538A1
Application number: PCT/CN2019/128429
Authority: WO
Inventors: 马江羽; 蔡晓东
Original assignee: 歌尔股份有限公司
Priority date: 2019-01-15
Filing date: 2019-12-25
Publication date: 2020-07-23
Also published as: CN209283491U

Abstract

The present invention relates to an electronic product. The electronic product comprises: a sounding device module, the sounding device module comprising a module housing and sounding units, the sounding units being disposed in the module housing and comprising a first sounding unit and a second sounding unit, a diaphragm being provided in each sounding unit, and the area of the diaphragm of the first sounding unit being greater than that of the second sounding unit; a product body, the sounding device module being provided in the product body, and a sound outlet being formed on the product body and allowing the sound generated by the sounding units to come out; and a sound output tube configured to guide the sound generated by the sounding device module to the sound outlet. One of the technical effects of the present invention is that the first sounding unit is used for a loudly playback function, and the second sounding unit is used for a voice answering function.

Description

electronic product

Technical field

The present invention belongs to the technical field of consumer electronic products. Specifically, the present invention relates to an electronic product.

Background technique

In recent years, consumer electronic products such as mobile phones and tablet computers have been widely used by consumers. With the rapid development of related technologies of electronic products, in order to achieve better performance, those skilled in the art have improved the structure and other characteristics of electronic products.

In terms of acoustics, electronic devices capable of generating stereo functions have appeared in the prior art. Electronic devices usually have receivers for users to listen to voices, and loudspeakers that can generate louder volumes for loudspeakers. The receiver is usually arranged at the top of the electronic device, and the speaker is usually arranged at the bottom of the electronic device. When a stereo effect is needed, the electronic device can activate the receiver and the speaker at the same time to produce the same sound, thereby forming a stereo effect.

However, this stereo effect has obvious shortcomings. The receiver is used for both voice calls and stereo loudspeakers, but the two applications have different performance requirements for the receiver. Therefore, it is necessary to correct the sound effect through relatively complicated signal processing, which increases the difficulty of actual product application. On the other hand, since the receiver is set on the top of the electronic device and the direction of the sound outlet is usually toward the front of the electronic device, this structural limitation causes the receiver to have large airflow noise and low loudness when it is used in high-volume loudspeaker applications, thereby causing the overall electronic device The stereo effect is poor.

Summary of the invention

An object of the present invention is to provide an improved stereo technical solution for electronic equipment.

According to an aspect of the present invention, an electronic product is provided, the electronic product including:

The sound emitting device module, the sound emitting device module includes a module housing and a sounding unit, the sounding unit is arranged in the module housing, the sounding unit includes a first sounding unit and a second sounding unit, so The sounding unit has a diaphragm, and the area of the diaphragm of the first sounding unit is larger than the area of the diaphragm of the second sounding unit;

Product body, the sound device module is arranged in the product body, the product body is formed with a sound outlet, and the sound outlet is used for the sound generated by the sound unit to emit;

The sound channel is configured to guide the sound generated by the sound device module to the sound outlet.

Optionally, the sound emission duct includes a first sound emission duct and a second sound emission duct, and the first sound emission duct is configured to guide the sound generated by the first sound emission unit to the sound emission port. The second sounding duct is configured to guide the sound generated by the second sounding unit to the sounding port.

Optionally, the sound duct is formed on the module housing.

Optionally, the sound channel is fixedly arranged in the product body.

Optionally, the first sounding unit and the second sounding unit are stacked on top of each other.

Optionally, the sound generating unit includes a magnetic circuit system and a voice coil, each of the diaphragms is connected with a voice coil, the magnetic circuit system includes a central magnetic part and a side magnetic part, the central magnetic part and the side magnetic part Part is fixed in the module housing, the side magnetic part is arranged around the central magnetic part, a magnetic gap is formed between the central magnetic part and the side magnetic part, and the voice coil is located in the magnetic In the gap, the first sounding unit and the second sounding unit share the same set of magnetic circuit systems, and the voice coil and diaphragm of the first sounding unit and the voice coil and diaphragm of the second sounding unit are located in the The upper and lower sides of the magnetic circuit system.

Optionally, the first sound emitting unit and the second sound emitting unit are arranged side by side.

Optionally, the sound unit includes a magnetic circuit system and a voice coil, each of the diaphragms is connected with a voice coil, and the magnetic circuit system includes a lower magnetic conductive plate, a central magnetic part and a side magnetic part. The magnetic part and the side magnetic part are arranged on the lower magnetic conductive plate, the side magnetic part is arranged around the central magnetic part, a magnetic gap is formed between the central magnetic part and the side magnetic part, and the sound The ring is located in the magnetic gap, the first sounding unit and the second sounding unit share the lower magnetic conductive plate, and the adjacent sides of the first sounding unit and the second sounding unit share the side magnet unit.

Optionally, the sound outlet includes a first sound outlet and a second sound outlet, the first sound outlet is configured to transmit the sound generated by the first sound unit, and the second sound outlet The sound mouth is used to transmit the sound generated by the second sound emitting unit.

Optionally, the first sound outlet is located on the side wall of the product main body, and the second sound outlet is located on the front surface of the product main body.

Optionally, the electronic product includes two sets of the sound emitting device modules, and the two sets of sound emitting device modules are respectively arranged at the top and bottom ends of the product body.

One technical effect of the present invention is that the sound emitting device module integrated with two sound emitting units can simultaneously meet the acoustic performance requirements of a receiver and a speaker.

Other features and advantages of the present invention will become clear by the following detailed description of exemplary embodiments of the present invention with reference to the drawings.

BRIEF DESCRIPTION

The drawings constituting a part of the specification describe the embodiments of the present invention, and together with the specification are used to explain the principle of the present invention.

1 is a schematic diagram of a three-dimensional structure of a sound device module provided by an embodiment of the present invention;

2 is a schematic side sectional view of a sound device module provided by an embodiment of the present invention;

3 is an exploded schematic diagram of parts of a sound device module provided by an embodiment of the present invention;

4 is a partial schematic diagram of an electronic product provided by an embodiment of the present invention;

FIG. 5 is an overall schematic diagram of an electronic product provided by an embodiment of the present invention;

6 is an overall schematic diagram of an electronic product provided by another embodiment of the present invention;

7 is a schematic top view of a sound device module provided by another embodiment of the present invention;

8 is a schematic side sectional view of a sound device module provided by another embodiment of the present invention;

9 is an exploded schematic diagram of parts of a sound device module provided by another embodiment of the present invention;

10 is a partial schematic diagram of an electronic product provided by another embodiment of the present invention;

FIG. 11 is an overall schematic diagram of an electronic product provided by another embodiment of the present invention;

FIG. 12 is an overall schematic diagram of an electronic product provided by another embodiment of the present invention.

detailed description

Various exemplary embodiments of the present invention will now be described in detail with reference to the drawings. It should be noted that, unless specifically stated otherwise, the relative arrangement of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention.

The following description of at least one exemplary embodiment is actually merely illustrative, and in no way serves as any limitation on the invention and its application or use.

The technology and equipment known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the technology and equipment should be regarded as part of the specification.

In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiment may have different values.

It should be noted that similar reference numerals and letters indicate similar items in the following drawings, therefore, once an item is defined in one drawing, there is no need to discuss it further in subsequent drawings.

The invention provides an electronic product, which includes a sound device module, a product body and a sound pipe.

The sound device module 1 includes a module housing and a sound unit. The module housing is used to carry various parts of the sound unit, and the sound device module 1 of the present invention is an independent and detachable module. The sounding unit is arranged in the module housing 12, and the sounding unit includes two parts, a first sounding unit 111 and a second sounding unit 112, as shown in FIGS. 2 and 8. The sound generating unit has a diaphragm 101 that can be driven to vibrate to generate sound. The area of the diaphragm 101 of the first sounding unit 111 is larger than the area of the diaphragm 101 of the second sounding unit 112, so that the effective sound radiation area of the first sounding unit 111 is larger than the effective sound radiation of the second sounding unit 112 area. The first sounding unit 111 may be mainly used to implement a speaker's sound output function, and the second sounding unit 112 may be mainly used to provide a receiver's function of answering calls. In the embodiments shown in FIGS. 1 and 2, the first sounding unit 111 is located on the lower side, the second sounding unit 112 is located on the upper side, and the two sounding units each have an independent and complementary interference diaphragm 101. The sounding directions of the two sounding units can be different.

The product body 2 is used to carry the sound device module 1 and also used to carry other electrical components in the electronic product, as shown in FIGS. 5 and 6. The invention does not limit the specific structure and type of the electronic product. For example, the electronic product can be a mobile phone or a tablet computer. The front surface of the electronic product may be provided with a screen 23, and a battery, microphone, processor, etc. may be provided inside. The product main body 2 is formed with a sound outlet, and the sound outlet is used for transmitting the sound generated by the sound unit.

The sound channel is used to guide the sound generated by the sound device module to the sound outlet. The present invention does not limit the specific structural form of the sound channel, and different structural characteristics of the sound channel are suitable for different application conditions. The invention provides specific optional implementations. The position of the sound outlet and the shape and cross-sectional area of the sound outlet will affect the final acoustic performance and ease of use of the electronic product. For example, for the second sounding unit mainly used as a receiver, the corresponding sound outlet may be located on the front of the product body, so that the user can bring the sound outlet close to the ear. Correspondingly, in order to make the sound outlet occupy as little as possible the front area of the electronic product, the area of the sound outlet and the cross section of the sound duct are relatively small, and the sound duct connects the sound area of the second sound unit with the corresponding sound口通。 Mouth connected. For the first sounding unit mainly used as a loud-volume loudspeaker function, the corresponding sound outlet may be located on the side of the product body. Correspondingly, the cross-sectional area of the sounding duct can be made larger, and by increasing the cross-section of the sounding duct, the smoothness of the sound of the first sounding unit is improved, thereby improving its loudness and sound quality. The sound pipe connects the sound area of the first sound unit with the corresponding sound outlet. The area of the sound outlet corresponding to the first sound emitting unit may also have a relatively larger area to improve the smoothness of sound.

The advantage of the electronic product provided by the present invention is that two sounding units are provided in the sounding device module to realize the functions of a receiver and a speaker respectively. The two sounding units can work independently, and at least the vibrating diaphragm part does not cause interference to each other. In addition, the complicated signal processing required by a sound unit in the prior art to realize the functions of a receiver and a speaker at the same time is eliminated. The electronic product of the present invention can simultaneously ensure the reliable receiver function and the loudspeaker output function, and further, it is more convenient to realize the stereo function on the electronic product.

On the other hand, the present invention concentrates the first sounding unit and the second sounding unit in the same sounding device module. The two sounding units can share the same module housing and other parts, which reduces the cost of the sounding device module. Material and processing costs also reduce the difficulty of assembling electronic products. The high level of integration of the sound device module can effectively reduce the space occupied by the product body, thereby meeting the design requirements of the light and thin structure of the electronic product.

Optionally, the sound emission duct may include a first sound emission duct 31 and a second sound emission duct 32, as shown in FIGS. 1-4 and 10. The first sounding duct 31 is configured to guide the sound generated by the first sounding unit 111 to the sounding port, and the second sounding duct 32 is configured to be used for generating the second sounding unit 112 The voice is guided to the utterance. One end of the first sounding duct 31 may be connected to the sounding area of the first sounding unit 111, and the other end may be connected to the sounding opening of the product main body 2. Similarly, one end of the second sounding duct 32 is connected to the sounding area of the second sounding unit 112, and the other end is connected to the sounding port of the product body 2. The advantage of using the first and second sounding ducts 32 is that different acoustic ducts can be configured for the acoustic performance required by different sounding units, so that the first sounding unit and the second sounding unit can respectively achieve the speaker function and the receiver function.

Optionally, the sound channel may be formed on the module housing 12, as shown in FIGS. 1-4. In the embodiment shown in FIGS. 1-4, the first sounding duct 31 corresponding to the first sounding unit 111 is directly formed by the module housing 12, and one end of the first sounding duct 31 is directly connected to the first The front surface of the diaphragm 101 of the sound generating unit 111, that is, below the lower diaphragm in FIG. 2, in order to derive the sound generated by the vibration of the diaphragm 101. As shown in FIG. 4, the other end of the first sound outlet pipe 31 is connected to the sound outlet of the product body 2 from the inner side of the product body 2 to guide the sound of the first sound emitting unit 111. The length of the first sound outlet pipe 31 is relatively long, and the first sound outlet pipe 31 is formed by the module housing 12, which eliminates the assembly step of separately assembling the first sound outlet pipe 31 into the product body 2 and reduces It is difficult to assemble.

Optionally, the sound outlet pipe can also be fixedly arranged in the product body 2. In this embodiment, the sound outlet pipe may be an independent sound outlet pipe component, or may be a structure integrally formed in the product body 2. In the embodiment shown in Figures 8-10, the sound device module 1 does not have a sound channel. After the sound device module 1 is assembled into the product body 2, the sound area on the sound device module 1 can be The sound pipes form a butt joint. In the embodiment shown in FIG. 10, the first sound outlet pipe 31 and the second sound outlet pipe 32 may be independent components, which may form a snap connection with the sound device module 1 and the product body 2. Fixed connection. This embodiment can simplify the structure of the sound device module 1 and the module housing.

The present invention provides a preferred structural implementation of a sound device module, as shown in Figures 1-3. In this embodiment, the diaphragms of the first sounding unit and the second sounding unit are independent of each other without interference. Moreover, the first sounding unit and the second sounding unit share the other parts of the sounding device module to the greatest extent, saving materials, reducing the processing difficulty, and reducing the space occupied by the sounding device module.

As shown in FIG. 2, the first sounding unit 111 and the second sounding unit 112 are arranged in a stack up and down. This embodiment is suitable for applications where the structure of an electronic product requires high length and width dimensions. When the space for the sounding device module provided by the electronic product is limited in the length and width directions, this embodiment is preferably adopted.

As shown in FIGS. 2 and 3, the sounding unit includes a magnetic circuit system and a voice coil 102, and the diaphragm 101 of each sounding unit is connected to a corresponding voice coil 102. The magnetic circuit system includes a central magnetic part 104 and a side magnetic part 103, and the central magnetic part 104 and the side magnetic part 103 are fixedly arranged in the module housing 12. The side magnetic portion 103 is arranged around the central magnetic portion 104, and a magnetic gap 105 is formed between the central magnetic portion 104 and the side magnetic portion 103. The central magnetic portion 104 and the edge magnetic portion 103 are located in the middle position in the thickness direction of the module housing 12. The spaces above and below the magnetic circuit system are used to accommodate the diaphragm 101 and the voice coil 102 of the two sounding units, respectively.

In particular, the first sounding unit 111 and the second sounding unit 112 share the same set of magnetic circuit systems. Since the magnetic circuit system is located in the middle of the thickness direction of the module housing 12, the voice coil 102 of the first sounding unit 111 is The diaphragm 101 and the voice coil 102 and the diaphragm 101 of the second sounding unit 112 can be respectively located on the upper and lower sides of the magnetic circuit system, and the module housing has enough space to accommodate the upper and lower diaphragms and the voice coil, As shown in Figure 2, space can be effectively used through this structural design.

Located on the lower side is the first sound emitting unit 111, the area of the diaphragm 101 is larger, and the effective radiation area of vibration and sound is larger, and it is preferably used for the sound output function of the speaker. The sound emission direction is guided from the lower side of the sound device module 1 to the side surface of the sound device module 1 through the first sound pipe 31 formed on the module housing 12. On the upper side is the second sounding unit 112, the area of the diaphragm 101 is relatively small, which is suitable for the call answering function of the receiver. The sound output direction is located above the sound device module 1 to facilitate the transmission of sound to the front of the electronic product main body 2.

When the sound device module 1 is assembled into the main body 2 of the electronic product, the first sound unit 111 located below can communicate with the sound outlet on the side of the product body through the sound pipe formed on the module housing 12. The first sound unit is used for the speaker function, and its corresponding sound outlet is located on the side to achieve a better stereo effect. The second sounding unit 112 located above can communicate with the sound outlet on the front of the product main body 2 through a sound outlet that is separately assembled to the product main body 2. The second sounding unit is used for the receiver function, so its corresponding sound outlet can be on the front of the product body, and the second sounding unit can be directly connected to the sound outlet through the sound pipe from above, and the sound does not need to be led to the side.

In another alternative implementation manner, the first sound emission unit 111 and the second sound emission unit 112 may be arranged side by side in the module housing 12, as shown in the implementation manners shown in FIGS. 7 and 8. This embodiment is suitable for applications where electronic products have high requirements for the thickness direction, and the space provided for the sound device module in the thickness direction is insufficient.

As shown in FIG. 8, the sounding unit further includes a magnetic circuit system and a voice coil 102, and the diaphragm 101 of each sounding unit is connected to the voice coil 102. The magnetic circuit system includes a lower magnetic conductive plate 106, a central magnetic part 104 and a side magnetic part 103. The central magnetic portion 104 and the side magnetic portion 103 are arranged on the lower magnetic conductive plate 106, and a magnetic gap 105 is formed between the central magnetic portion 104 and the side magnetic portion 103. The voice coil can be suspended in the magnetic gap 105 under the connection and suspension action of the diaphragm.

Preferably, as shown in FIGS. 8 and 9, the first sounding unit 111 and the second sounding unit 112 share the same lower magnetic conductive plate 106. A part of the structure used to enclose the edge magnet portion 103 of the first sound emitting unit 111 is also used to form a part of the edge magnet portion 103 of the second sound emitting unit 112. That is, the opposite sides of the first sound emitting unit 111 and the second sound emitting unit 112 share the same edge magnet portion 103. In addition, optionally, the two sound generating units also share an upper cover 121, which is a part of the module housing. The upper cover plate 121 is arranged above the two sound generating units, and the upper cover plate 121 is provided with two hollow parts 1211 for transmitting the sound generated by the vibration of the diaphragm 101. In this design, the birth surfaces of the two sounding units are on the same side. The first sound outlet pipe 31 and the second sound outlet pipe 32 are correspondingly butted on the two hollow parts 1211.

The two sound generating units of the foregoing embodiment are integrated into one module, and share the module housing, the lower magnetic conductive plate 106 and other components, which greatly reduces the material cost and processing cost. Moreover, the integration of the two sound generating units into one body can also reduce the assembly limit, retaining wall and other structures in the product body 2 and save space.

The two sound generating units of the above embodiment are integrated into one module, and share the magnetic circuit system and the module housing, which greatly reduces the material cost and processing cost. This embodiment can produce space saving effects in both the thickness and the length and width directions of the sound emitting device module. Moreover, the integration of the two sound generating units can also reduce the assembly limit, retaining wall and other structures in the product body.

As described in the above embodiment, the sound outlet may include a first sound outlet 21 and a second sound outlet 22. The first sound outlet 21 is for transmitting the sound generated by the first sounding unit, and the second sounding port 22 is for transmitting the sound generated by the second sounding unit. In the embodiment shown in FIGS. 4 and 5, the sound-emitting area of the first sound-producing unit 111 is guided to the sound-producing area on the product body 2 through the first sound-producing duct 31 formed on the module housing 12 The first sound outlet 21 is located on the side wall of the product body 2. The sounding area of the second sounding unit 112 is guided to the second sounding opening 22 of the product body 2 through an independent second sounding duct 32, and the second sounding opening 22 is located on the front side of the product body 2. Edge position. In the embodiment shown in FIG. 10, the sound area of the first sound emitting unit 111 is guided to the first sound outlet 21 on the product body 2 through an independent first sound outlet pipe 31, and the first sound outlet 21 The sound port 21 is located on the side wall of the product body 2. The sounding area of the second sounding unit 112 is guided to the second sounding opening 22 of the product body 2 through an independent second sounding duct 32, and the second sounding opening 22 is located on the front side of the product body 2. Edge position.

Figures 5 and 11 show schematic diagrams of the overall structure of two electronic products, and Figures 5 and 11 show embodiments in which two sounding device modules 1 are respectively provided.

In particular, in a preferred embodiment, the electronic product may include two sets of sound device modules 1. Two sets of sound device modules 1 are respectively arranged on the top and bottom of the product body 2. 6 and 12 respectively show the implementation of two different sounding device modules in an electronic product including a pair of two sounding device modules. Figure 6 shows that the electronic product includes two sounding device modules as shown in Figures 1 and 2, and Figure 12 shows that the electronic product includes two sounding device modules as shown in Figures 7 and 8.

The advantage of this design is that, firstly, the first sounding units of the two sets of sounding device modules 1 can better produce stereo effects when working at the same time. The sound device modules at both ends of the electronic product are exactly the same, which is more conducive to achieving high-quality stereo effects. Second, since the two sounding device modules 1 both have a second sounding unit, in theory, no matter which end of the mobile phone is used as the top end of the user to listen to voice, the electronic product can provide the receiver function corresponding to the second sounding unit at the end . This structural configuration provides a broader direction for the development and application of full-screen mobile phones. For example, a full-screen mobile phone can no longer distinguish between the top and bottom of a traditional mobile phone, and the second sounding unit at either end can be used as a receiver. This structural design is a design scheme that breaks through the conventional design ideas of the prior art. Through the internal sensors of the full screen mobile phone to recognize the user's holding mode, the function that both ends can answer the voice can be realized, and the application is more convenient.

Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the invention is defined by the appended claims.

Claims

An electronic product, characterized in that it includes:

A sound emitting device module, the sound emitting device module includes a module housing and a sounding unit, the sounding unit is arranged in the module housing, the sounding unit includes a first sounding unit and a second sounding unit, so The sounding unit has a diaphragm, and the area of the diaphragm of the first sounding unit is larger than the area of the diaphragm of the second sounding unit;

Product body, the sound device module is arranged in the product body, the product body is formed with a sound outlet, and the sound outlet is used for the sound generated by the sound unit to emit;

The sound channel is configured to guide the sound generated by the sound device module to the sound outlet.
The electronic product according to claim 1, wherein the sound outlet pipe comprises a first sound outlet pipe and a second sound outlet pipe, and the first sound outlet pipe is configured to generate The sound of is guided to the sound outlet, and the second sound duct is configured to guide the sound generated by the second sound unit to the sound outlet.
The electronic product according to claim 1, wherein the sound channel is formed on the module housing.
The electronic product according to claim 1, wherein the sound outlet pipe is fixedly arranged in the product body.
The electronic product according to claim 1, wherein the first sounding unit and the second sounding unit are stacked on top of each other.
The electronic product according to claim 5, wherein the sound generating unit includes a magnetic circuit system and a voice coil, each of the diaphragms is connected with a voice coil, and the magnetic circuit system includes a central magnetic part and a side magnetic part. Part, the central magnetic part and the side magnetic part are fixed in the module housing, the side magnetic part is arranged around the central magnetic part, and a magnetic field is formed between the central magnetic part and the side magnetic part. The voice coil is located in the magnetic gap, the first sounding unit and the second sounding unit share the same set of magnetic circuit system, and the voice coil and the diaphragm of the first sounding unit and the second sounding unit The voice coil and diaphragm are respectively located on the upper and lower sides of the magnetic circuit system.
The electronic product according to claim 1, wherein the first sounding unit and the second sounding unit are arranged side by side.
The electronic product according to claim 7, wherein the sound generating unit includes a magnetic circuit system and a voice coil, each of the diaphragms is connected with a voice coil, and the magnetic circuit system includes a lower magnetic conductive plate, a center A magnetic part and a side magnetic part, the central magnetic part and the side magnetic part are arranged on the lower magnetic conductive plate, the side magnetic part is arranged around the central magnetic part, the central magnetic part and the side magnetic part A magnetic gap is formed therebetween, the voice coil is located in the magnetic gap, the first sounding unit and the second sounding unit share the lower magnetic conductive plate, and the first sounding unit and the second sounding unit are opposite to each other. Adjacent sides share one side magnet part.
The electronic product according to claim 1, wherein the sound outlet comprises a first sound outlet and a second sound outlet, and the first sound outlet is configured for the first sound emitting unit to generate The second sound outlet is used for the sound generated by the second sound emitting unit.
9. The electronic product according to claim 9, wherein the first sound outlet is located on a side wall of the product main body, and the second sound outlet is located on the front surface of the product main body.
The electronic product according to any one of claims 1-10, wherein the electronic product comprises two sets of the sounding device modules, and the two sets of the sounding device modules are respectively arranged on the top of the product body And the bottom end.