Handheld device and vibration-damping member thereof

Abstract

Disclosed in the present application are a handheld device and a vibration-damping member thereof. The handheld device comprises a rear cover and a main body which are fitted to each other, and between which the vibration-damping member is configured to be arranged, wherein the rear cover has an inner surface facing the main body, the main body comprises a sound module, and the inner surface of the rear cover has a predetermined area directly facing the sound module of the main body; the predetermined area is spaced apart from the sound module by a predetermined gap; the vibration-damping member of the handheld device comprises a sound-absorbing sheet, the sound-absorbing sheet having a sheet shape with a certain thickness, having a predetermined compression ratio, and having a thickness, in an initial uncompressed state, that is greater than the predetermined gap; and the sound-absorbing sheet at least covers the predetermined area. The present application, while ensuring a relatively good sound quality of the handheld device, reduces vibrations having negative effects on users as much as possible, thereby improving the user experience.

Description

Handheld devices and their shock absorbers

[0001] cross-application

[0002] This application claims priority to Chinese Patent Application No. 202411981069.7, filed on December 31, 2024, and incorporates the entire contents of the disclosure of the aforementioned patent application as part of this application. Technical Field

[0003] This application relates to the field of vibration damping technology for electronic devices, and in particular to a handheld device and its vibration damping component. Background Technology

[0004] In the existing technology, handheld devices (taking mobile phones as an example) will vibrate during use due to various reasons.

[0005] The varying degrees of vibration a mobile phone produces in different scenarios have different meanings for the user. For example, components within the phone vibrate when they are working (such as the vibration motor specifically designed to provide haptic feedback). This vibration is transmitted to the back cover, and the user can feel it when holding the phone. Such vibrations serve as a reminder and have a positive effect on the user.

[0006] For example, if a mobile phone's speaker module uses an open-back design (meaning the speaker unit is not enclosed in a specific volume but is connected to the phone's back cover), then when the speaker module is working, the vibration of the diaphragm in the speaker unit will cause airflow to vibrate. The front of the diaphragm emits sound outwards, while the back of the diaphragm moves inwards (inside the phone), causing airflow to surge and resulting in vibration of the phone's back cover. When the phone is in an open state, the higher the volume setting, the stronger the vibration, and the worse the user experience. This type of vibration is undesirable for users and has a negative impact.

[0007] Generally, for mobile phone speaker modules, if the speaker module is in a closed state, the sound quality is relatively poor; if the speaker module is in an open state, the sound quality is relatively good. Specifically, the sound quality of a single speaker module unit in an open free field is the best, followed by a sufficiently large back cavity; the smaller the back cavity volume, the worse the sound quality. However, for open speaker modules, after being installed in a mobile phone terminal, there will be a serious shell vibration problem (back shell vibration), which directly reduces the user experience. Overall, there is a contradiction between the sound quality and vibration of the speaker module. When the mobile phone speaker or receiver is working, airflow passes between the mobile phone frame and the back cover, and the airflow will cause the back cover to resonate.

[0008] In order to minimize vibration while ensuring good sound quality in the phone's speaker module or receiver, current technology involves creating cavities in the phone's back cover or using foam / double-sided tape for shock absorption.

[0009] Regarding the method of setting up a cavity, if the cavity volume is small, the shock absorption effect will be very limited. If the cavity volume is large, it will directly affect the size of the phone and cannot meet the needs of actual mobile phone products.

[0010] The method of using foam / double-sided tape in the back shell for shock absorption has the following drawbacks:

[0011] 1) It is not suitable for high-temperature scenarios. When the phone is in a slightly high temperature, the foam / double-sided tape is prone to structural collapse, which reduces the shock absorption effect.

[0012] 2) Large pieces of foam / double-sided tape release small organic molecules during the operation of the mobile phone, which may have an impact on human health;

[0013] 3) Due to the inherent pore structure of the foam / double-sided tape, it cannot effectively reduce vibration. Therefore, it is necessary to propose a handheld device and its shock-absorbing components to solve at least one of the above problems. Summary of the Invention

[0014] In view of the shortcomings of the existing technology, this application provides a handheld device and its shock absorber, which minimizes vibrations that have a negative impact on the user while ensuring that the handheld device has good sound quality, thereby improving the user experience.

[0015] The specific technical solution for the implementation of this application is as follows:

[0016] This application provides a shock absorber for a handheld device, the handheld device including a rear cover and a main body that are opposed to each other. The shock absorber is disposed between the rear cover and the main body, the rear cover having an inner surface facing the main body. The main body includes a sound module, and the inner surface of the rear cover has a predetermined area directly opposite the sound module of the main body. A predetermined gap is spaced between the predetermined area and the sound module. The shock absorber of the handheld device includes a sound-absorbing powder sheet with a predetermined compression ratio, the thickness of the sound-absorbing powder sheet in its initial state before compression being greater than the predetermined gap. The sound-absorbing powder sheet at least covers the predetermined area.

[0017] In an alternative embodiment, the sound-absorbing powder sheet is filled between the back cover and the body by an interference fit.

[0018] In an optional embodiment, the predetermined compression ratio of the sound-absorbing powder sheet is between 1% and 10%.

[0019] In an optional embodiment, the predetermined compression ratio of the sound-absorbing powder sheet is between 1% and 5%.

[0020] In one optional embodiment, the circumferential outer contour of the sound-absorbing powder sheet is clearance-fitted with the rear cover, and the overall contour of the sound-absorbing powder sheet is adapted to the structure of the inner surface of the rear cover.

[0021] In one optional embodiment, the surface area of ​​the sound-absorbing powder sheet that is in contact with the inner surface of the back cover accounts for more than 90% of the inner surface of the back cover.

[0022] In one alternative embodiment, the surface area of ​​the sound-absorbing powder sheet accounts for 95% to 99% of the inner surface of the rear cover.

[0023] In an alternative embodiment, the sound-absorbing powder sheet completely covers the inner surface of the back cover.

[0024] In one optional embodiment, the sound-absorbing powder sheet includes any one of the following: powder sheet, composite material powder sheet, and co-formed fiber powder sheet.

[0025] In one alternative embodiment, the composite material powder sheet is obtained by impregnating a melamine sponge with a powder slurry.

[0026] In one alternative embodiment, the co-formed fiber powder sheet comprises interwoven fibrous material and a porous powder material disposed on the fibrous material.

[0027] In one optional embodiment, the sound-absorbing powder sheet includes: a main structure with a three-dimensional network structure and porous powder disposed on the surface of the main structure.

[0028] This application also provides a handheld device, which includes the shock-absorbing component of any of the handheld devices described above.

[0029] In one alternative embodiment, the shock absorber is fixed to the rear cover, and / or the shock absorber is fixed to the body.

[0030] In one alternative implementation, the handheld device includes any one of the following: mobile phone, tablet computer, smartwatch, or laptop computer.

[0031] The technical solution of this application has the following significant beneficial effects:

[0032] In the embodiments of this application, sound-absorbing powder is mainly filled in the gap between the back cover and the main body. The sound-absorbing powder is a damping component with a small compression ratio. The thickness of the sound-absorbing powder in its initial state before compression is greater than the gap between the back cover and the main body. When the sound-absorbing powder is filled between the back cover and the main body, the advantages of the sound-absorbing powder itself and its cooperation with the back cover and the main body can be utilized to achieve an ideal vibration reduction effect. Attached Figure Description

[0033] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this application in any way. Furthermore, the shapes and scales of the components in the drawings are merely illustrative to aid in understanding this application and do not specifically limit the shapes and scales of the components. Those skilled in the art, guided by the teachings of this application, can select various possible shapes and scales to implement this application according to specific circumstances.

[0034] Figures 1 and 2 are schematic diagrams of the structure of a mobile phone provided in the embodiments of this application;

[0035] Figures 3 and 4 are exploded perspective views of a mobile phone provided in the embodiments of this application;

[0036] Figure 5 is a partial assembly diagram of a mobile phone provided in an embodiment of this application;

[0037] Figure 6 is a schematic diagram of the measured vibration velocity distribution of the back cover obtained after the test of Scheme A;

[0038] Figure 7 is a schematic diagram of the measured vibration velocity distribution of the back cover obtained after the test of scheme B;

[0039] Figure 8 is a schematic diagram of the measured vibration velocity distribution of the back cover obtained after the test of scheme C;

[0040] Figure 9 is a schematic diagram of the measured vibration acceleration distribution of the back cover obtained after the test of Scheme A;

[0041] Figure 10 is a schematic diagram of the measured vibration acceleration distribution of the back cover obtained after the test of scheme B;

[0042] Figure 11 is a schematic diagram of the measured vibration acceleration distribution of the back cover obtained after the test of scheme C.

[0043] Reference numerals in the figures of this application:

[0044] 100. Mobile phone; 1. Back cover; 2. Sound-absorbing powder sheet; 3. Sound module; 4. Main body. Detailed Implementation

[0045] The technical solutions of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate this application and are not intended to limit the scope of this application. After reading this application, any modifications of this application in various equivalent forms by those skilled in the art fall within the scope defined by the appended claims.

[0046] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0048] This application provides a handheld device and its shock absorber, which minimizes vibrations that have a negative impact on the user while ensuring that the handheld device has good sound quality, thereby improving the user experience.

[0049] Please refer to Figures 1 to 4. This application provides a shock-absorbing component for a handheld device. The handheld device can specifically include any of the following: a mobile phone 100, a tablet computer, a smartwatch, a laptop computer, etc. Furthermore, the handheld device can also be other electronic devices requiring shock absorption. In this application, the handheld device is primarily described using a mobile phone 100 as an example. When the handheld device is of other forms, this application can be consulted.

[0050] As shown in Figures 1 to 5, the handheld device may include a rear cover 1 and a main body 4 that are connected to each other. The shock absorber is disposed between the rear cover 1 and the main body 4. The rear cover 1 has an inner surface facing the main body 4. The main body 4 includes a sound module 3. The inner surface of the rear cover 1 has a predetermined area that is directly opposite the sound module 3 of the main body 4. A predetermined gap is spaced between the predetermined area and the sound module 3. The shock absorber of the handheld device includes a sound-absorbing powder sheet 2. The sound-absorbing powder sheet 2 has a predetermined compression ratio. The thickness of the sound-absorbing powder sheet 2 in its initial state before compression is greater than the predetermined gap. The sound-absorbing powder sheet 2 at least covers the predetermined area.

[0051] For the mobile phone 100, the main body 4 may include: a front cover, a mid-frame, and a sound module 3. The sound module 3 may include a speaker and a receiver.

[0052] In the embodiments of this application, the gap between the back cover 1 and the main body 4 is mainly filled with sound-absorbing powder sheet 2. The sound-absorbing powder sheet 2 is specifically a damping component with a small compression ratio. The thickness of the sound-absorbing powder sheet 2 in its initial state before compression is greater than the gap between the back cover 1 and the main body 4. When the sound-absorbing powder sheet 2 is filled between the back cover 1 and the main body 4, the advantages of the sound-absorbing powder sheet 2 itself and its cooperation with the back cover 1 and the main body 4 can be utilized to achieve an ideal vibration reduction effect.

[0053] The vibration damping effect of the sound-absorbing powder sheet 2 is due to its rich porous structure and large specific surface area. Taking zeolite + fiber as an example, zeolite itself is a material with a rich porous structure (including micropores, mesopores, etc.). In addition, due to the defects in its crystal structure during the zeolite preparation process, more intergranular mesopores and macropores are introduced. The interlacing distribution of pores of different dimensions allows the air movement that causes vibration to be quickly eliminated within the aforementioned pores, thereby significantly reducing the hand-held vibration caused by the impact of air movement on the back cover 1. In addition, the interlacing distribution between fibers further enhances the aforementioned effect. The airflow impacts the fibers, causing friction between fibers and between fibers and zeolite, and the large pores between them, further slowing down the airflow impact and reducing the hand-held vibration.

[0054] In this embodiment, the sound-absorbing powder sheet 2 may include any one of the following: powder sheet, composite material powder sheet, or co-molded fiber powder sheet.

[0055] The composite material powder sheet is obtained by impregnating a melamine sponge with a powder slurry.

[0056] The co-formed fiber powder sheet comprises interwoven fibrous materials and porous powder materials disposed on the fibrous materials.

[0057] In one embodiment, the sound-absorbing powder sheet 2 includes: a main structure with a three-dimensional network structure and porous powder disposed on the surface of the main structure.

[0058] Of course, the specific composition and arrangement of the sound-absorbing powder sheet can also be in other forms, and are not limited to the above description. Those skilled in the art may make other changes under the guidance of the technical essence of this application, but as long as the function and effect achieved are the same as or similar to this application, they should be covered within the scope of protection of this application.

[0059] In this embodiment, the sound-absorbing powder sheet 2 is a sheet-like thin sheet with a predetermined outer contour shape. The sound-absorbing powder sheet 2 has a first surface and a second surface opposite each other in the thickness direction. The first surface of the sound-absorbing powder sheet 2 is used to adhere to the inner surface of the rear cover 1, and the second surface of the sound-absorbing powder sheet 2 is used to adhere to the main body 4.

[0060] Specifically, the sound-absorbing powder sheet 2 can be filled between the back cover 1 and the main body 4 by an interference fit. When the sound-absorbing powder sheet 2 is filled between the back cover 1 and the main body 4 by an interference fit, it can reliably ensure that the sound-absorbing powder sheet 2 is tightly fitted with the back cover 1 and the main body 4, thereby achieving an ideal sound absorption and vibration reduction effect.

[0061] In one embodiment, the predetermined compression ratio of the sound-absorbing powder sheet 2 is between 1% and 10%.

[0062] When the compression ratio of the sound-absorbing powder sheet 2 is greater than 1% and less than 10%, that is, within the specific compression ratio range mentioned above, the sound-absorbing powder sheet 2 can achieve a vibration damping effect. However, beyond this range, the vibration damping effect decreases significantly. Specifically, when the compression ratio is too small / absent, or even when there is a gap fit, the elasticity of the powder sheet's own structure is difficult to be effective in damping; while when the compression ratio is too large, the material pores are compressed to the point of exhaustion, and the material's own rigidity increases significantly, and the originally advantageous pores can no longer play a role.

[0063] Furthermore, the predetermined compression ratio of the sound-absorbing powder sheet 2 is between 1% and 5%.

[0064] The compression ratio of the sound-absorbing powder sheet 2 is less than 5%, which makes the sound-absorbing powder sheet 2 reach a slightly compressed state. When the sound-absorbing powder sheet 2 reaches a slightly compressed state, its sound absorption and vibration reduction effect is optimal.

[0065] In one embodiment, the circumferential outer contour of the sound-absorbing powder sheet 2 is fitted with the rear cover 1 with a gap, and the overall contour of the sound-absorbing powder sheet 2 is adapted to the structure of the inner surface of the rear cover 1.

[0066] In this embodiment, the circumferential outer contour of the sound-absorbing powder sheet 2 can be adapted to the inner surface of the back cover 1. For example, when the back cover 1 is a rectangle with rounded corners on all four sides, the sound-absorbing powder sheet 2 can also be a rectangle with rounded corners on all four sides.

[0067] In addition, when the back cover 1 has an opening near one of the top corners for mounting modules such as cameras, the sound-absorbing powder sheet 2 can also have an opening at the same position as the opening, or a notch can be directly provided, so as to ensure that the sound-absorbing powder sheet 2 does not block the opening and cause interference.

[0068] Of course, the specific structure of the sound-absorbing powder sheet 2 can vary depending on the specific shape and structure of the back cover 1 of the handheld device to which it is applied, and this application does not make any specific limitations here.

[0069] When the circumferential outer contour of the sound-absorbing powder sheet 2 is adapted to the inner surface of the back cover 1, it can reliably and effectively absorb the sound from the sound module 3 of the main body 4 toward the back cover 1.

[0070] Specifically, the surface area of ​​the sound-absorbing powder sheet 2 accounts for more than 90% of the inner surface of the rear cover 1.

[0071] Theoretically, without affecting the assembly efficiency of the sound-absorbing powder sheet 2, the closer the surface area of ​​the sound-absorbing powder sheet 2 is to the area of ​​the inner surface of the back cover 1, the larger the sound-absorbing area that can be formed in the sound propagation direction between the sound module 3 of the main body 4 and the back cover 1, and the better the vibration reduction effect. Therefore, the surface area of ​​the sound-absorbing powder sheet 2 that is in contact with the inner surface of the back cover 1 can account for more than 90% of the inner surface of the back cover 1.

[0072] Considering that the sound-absorbing powder sheet 2 may have certain deformation requirements during assembly and use, and for the case where the predetermined compression ratio of the sound-absorbing powder sheet 2 is between 1% and 10%, the surface area of ​​the sound-absorbing powder sheet 2 accounts for more than 90% of the inner surface of the back cover 1, which can be adapted to the compression ratio of the sound-absorbing powder sheet 2.

[0073] Specifically, when the sound-absorbing powder sheet 2 is compressed, the surface area of ​​the sound-absorbing powder sheet 2 may be able to expand and extend to a certain extent, resulting in a new deformed surface area. The outer contour shape of the sound-absorbing powder sheet 2 with the new surface area can be basically or completely the same as the inner surface of the back cover 1.

[0074] Furthermore, the surface area of ​​the sound-absorbing powder sheet 2 accounts for 95% to 99% of the inner surface of the rear cover 1.

[0075] Considering that the sound-absorbing powder sheet 2 may have certain deformation requirements during assembly and use, and for the case where the predetermined compression ratio of the sound-absorbing powder sheet 2 is between 1% and 5%, when the surface area of ​​the sound-absorbing powder sheet 2 occupies 95% to 99% of the inner surface of the back cover 1, it can be adapted to the compression ratio of the sound-absorbing powder sheet 2.

[0076] In one embodiment, the sound-absorbing powder sheet 2 completely covers the inner surface of the back cover 1.

[0077] When the thickness of the sound-absorbing powder sheet 2 is equal to the predetermined gap, the sound-absorbing powder sheet 2 does not need to be compressed. In this case, the thickness of the sound-absorbing powder sheet 2 can be equal to the predetermined gap between the inner surface of the rear cover 1 and the main body 4. When the sound-absorbing powder sheet 2 completely covers the inner surface of the rear cover 1, a better sound absorption and vibration reduction effect can be achieved.

[0078] The applicant has conducted experimental verification of the shock absorber of the handheld device provided in the embodiments of this application, and the following will explain the beneficial effects that the shock absorber of the handheld device provided in this application can achieve, in conjunction with specific experimental data.

[0079] For scheme A, the vibration source has an area of ​​70 mm², a frequency of 800 Hz, and a sinusoidal single-sided amplitude of 0.5 mm. The rear cavity has a capacity of 4 cc, and the air space has dimensions of 150 × 60 × 0.4 mm. The rear cover 1 has a thickness of 0.6 mm and is made of FR4 material.

[0080] The difference between Option B and Option A is that foam is placed in the aforementioned air zone.

[0081] The difference between Scheme C and Scheme A is that a damping element (sound-absorbing powder sheet 2) as described in this application is provided in the aforementioned air domain.

[0082] Please refer to Figures 6, 7, and 8, taking the vibration velocity in the middle as an example, to visually illustrate:

[0083] The vibration velocity in the middle of Scheme A is 6.1 m / s;

[0084] The vibration velocity in the middle of Scheme B is 4.1 m / s;

[0085] The vibration velocity in the middle of Scheme C is 1.7 m / s;

[0086] The three decrease sequentially, and the damping device scheme C provided in the embodiments of this application has the smallest vibration speed.

[0087] Please refer to Figures 9, 10, and 11. Taking the vibration acceleration in the middle as an example, you can intuitively see:

[0088] The vibration acceleration in the middle of Scheme A is 18.5 m / s². 2 ;

[0089] The vibration acceleration in the middle of Scheme B is 12.1 m / s². 2 ;

[0090] The vibration acceleration in the middle of Scheme C is 5.8 m / s². 2 ;

[0091] The three decrease sequentially, and the damping component scheme C provided in the embodiments of this application has the smallest vibration acceleration.

[0092] This application also provides a handheld device, which includes the above-mentioned shock absorber. By setting the shock absorber, the handheld device can achieve the technical effect achieved by the shock absorber implementation. For details, please refer to the specific description of the above implementation, which will not be repeated here.

[0093] The handheld device may include any one of the following: mobile phone 100, tablet computer, smartwatch, or laptop computer.

[0094] Of course, the specific form of the handheld device is not limited to the above description. Those skilled in the art may make other changes based on the technical essence of this application, but as long as the function and effect it achieves are the same as or similar to this application, they should be covered within the scope of protection of this application.

[0095] In one embodiment, the shock absorber is fixed to the rear cover 1, and / or the shock absorber is fixed to the main body 4.

[0096] The shock absorber can be fixed to the rear cover 1, or to the main body 4, or simultaneously to both the rear cover 1 and the main body 4; alternatively, it can be directly fixed between the rear cover 1 and the main body 4 via an interference fit. The specific fixing position of the shock absorber can be adjusted according to the different assembly requirements of the actual product, and this application does not impose specific limitations on it.

[0097] When the shock absorber is fixed to the rear cover 1 and / or the main body 4, it can be fixed locally at multiple points or the entire surface can be fixed. This application does not make specific limitations on the specific fixing method.

[0098] It should be noted that in the description of this application, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more.

[0099] The various embodiments described in this specification are presented in a progressive manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0100] The above are merely a few embodiments of this application. Although the embodiments disclosed in this application are as described above, the content is only for the purpose of facilitating understanding of this application and is not intended to limit this application. Any person skilled in the art to which this application pertains may make any modifications and changes in the form and details of the embodiments without departing from the spirit and scope disclosed in this application, but the scope of patent protection of this application shall still be determined by the scope defined in the appended claims.

Claims

1. A shock absorber for a handheld device, characterized in that, The handheld device includes a back cover and a main body that are connected to each other. The shock absorber is disposed between the back cover and the main body. The back cover has an inner surface facing the main body. The main body includes a sound module. The inner surface of the back cover has a predetermined area that is directly opposite the sound module of the main body. A predetermined gap exists between the predetermined area and the sound module, and the shock-absorbing component of the handheld device includes: The sound-absorbing powder sheet is in the form of a sheet of a certain thickness, has a predetermined compression ratio, and its initial thickness before compression is greater than the predetermined gap; the sound-absorbing powder sheet at least covers the predetermined area.

2. The shock absorber for a handheld device as described in claim 1, characterized in that, The sound-absorbing powder sheet is filled between the back cover and the main body by an interference fit.

3. The shock absorber for a handheld device as described in claim 2, characterized in that, The predetermined compression ratio of the sound-absorbing powder sheet is between 1% and 10%.

4. The shock absorber for a handheld device as described in claim 3, characterized in that, The predetermined compression ratio of the sound-absorbing powder sheet is between 1% and 5%.

5. The shock absorber for a handheld device as described in claim 1, characterized in that, The circumferential outer contour of the sound-absorbing powder sheet is fitted with the back cover with a gap, and the overall contour of the sound-absorbing powder sheet is adapted to the structure of the inner surface of the back cover.

6. The shock absorber for a handheld device as described in claim 3, characterized in that, The surface area of ​​the sound-absorbing powder sheet that is in contact with the inner surface of the back cover accounts for more than 90% of the area of ​​the inner surface of the back cover.

7. The shock absorber for a handheld device as described in claim 4, characterized in that, The surface area of ​​the sound-absorbing powder sheet accounts for 95% to 99% of the area of ​​the inner surface of the rear cover.

8. The shock absorber for a handheld device as described in any one of claims 1 to 7, characterized in that, The sound-absorbing powder sheet completely covers the inner surface of the back cover.

9. The shock absorber for a handheld device as described in any one of claims 1 to 7, characterized in that, The sound-absorbing powder sheet includes any one of the following: powder sheet, composite material powder sheet, and co-formed fiber powder sheet.

10. The shock absorber for a handheld device as described in claim 9, characterized in that, The composite material powder is obtained by impregnating powder slurry with melamine sponge.

11. The shock absorber for a handheld device as described in claim 9, characterized in that, The co-formed fiber powder sheet comprises interwoven fibrous materials and porous powder materials disposed in the fibrous materials.

12. The shock absorber for a handheld device as described in any one of claims 1 to 7, characterized in that, The sound-absorbing powder sheet includes: a main structure with a three-dimensional network structure and porous powder disposed on the surface of the main structure.

13. A shock absorber for a handheld device, characterized in that, The handheld device includes a back cover and a main body that are connected to each other. The shock absorber is disposed between the back cover and the main body. The back cover has an inner surface facing the main body. The main body includes a sound module. The inner surface of the back cover has a predetermined area that is directly opposite the sound module of the main body. In the thickness direction of the handheld device, a predetermined gap is spaced between the predetermined area and the sound module; the shock-absorbing component of the handheld device includes: The sound-absorbing powder sheet is in the form of a sheet of a certain thickness, has a predetermined compression ratio, and its initial thickness before compression is greater than the predetermined gap; the sound-absorbing powder sheet at least covers the predetermined area; wherein the sound-absorbing powder sheet has staggered channels.

14. A handheld device, characterized in that, The handheld device includes the shock-absorbing component of the handheld device as described in any one of claims 1 to 13.

15. The handheld device as claimed in claim 14, characterized in that, The shock absorber is fixed to the rear cover, and / or the shock absorber is fixed to the main body.

16. The handheld device as claimed in claim 14, characterized in that, The handheld device includes any one of the following: mobile phone, tablet computer, smartwatch, or laptop computer.

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