Handheld device and damping part thereof

Abstract

The handheld device comprises a rear cover and a main body which are in butt joint, the damping part is used for being arranged between the rear cover and the main body, the rear cover is provided with an inner surface facing the main body, and the main body comprises a sound module. The inner surface of the rear cover is provided with a preset area which is opposite to the sound module of the main body; a preset gap is formed between the preset area and the sound module, the damping part of the handheld device comprises a sound absorption powder sheet, the sound absorption powder sheet is in a sheet shape with a certain thickness and has a preset compression ratio, and the thickness of the sound absorption powder sheet in an initial state before compression is larger than that of the preset gap; and the sound absorption powder sheet at least covers the preset area. According to the invention, on the premise of ensuring that the handheld device has better sound quality, vibration which has negative significance to a user is reduced as much as possible, and the use experience of the user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic equipment shock absorption, and in particular to a handheld device and a shock absorption component thereof. Background Art

[0002] In the prior art, a handheld device (taking a mobile phone as an example) may vibrate during use due to various reasons.

[0003] The different degrees of vibration produced by the mobile phone in different scenarios have different meanings for users. For example, when the components in the mobile phone are working, they will generate vibrations themselves (such as the vibration motor in the mobile phone that is specially used to provide vibration), and the vibrations are transmitted to the back shell, and the user can feel the vibrations when holding the phone. The above-mentioned vibrations can serve as a reminder for users and have positive significance.

[0004] For another example, if the speaker module in a mobile phone adopts an open rear cavity (that is, the speaker unit is not enclosed in a specific volume, but is connected to the back shell space of the mobile phone), then when the speaker module is working, the vibration of the diaphragm in the speaker unit will drive the airflow to vibrate, so that the front of the diaphragm emits sound outward, and the back of the diaphragm causes airflow to move inward (inside the mobile phone), causing the back shell of the mobile phone to vibrate due to the impact of the airflow. When the mobile phone is in the public state, the higher the volume is set, the stronger the vibration of the mobile phone, and the worse the user experience. The above-mentioned vibrations are undesirable for users and have negative significance.

[0005] Generally, for the speaker module of a mobile phone, 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 the speaker module monomer 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 an open speaker module, there will be serious shell vibration (back shell vibration) problems after it is assembled into a mobile phone terminal, and this vibration will directly reduce the user experience. On the whole, the sound quality and vibration of the speaker module are contradictory. When the mobile phone speaker or receiver is working, airflow passes between the middle frame and the back cover of the mobile phone, and the airflow will cause resonance of the back cover of the mobile phone.

[0006] In order to reduce vibration as much as possible while ensuring that the speaker module or receiver of the mobile phone has better sound quality, the current existing technology is to provide a cavity on the back cover of the mobile phone or to affix foam or double-sided tape to reduce vibration.

[0007] Among them, as for the method of setting the cavity, if the volume of the cavity is small, the effect of shock absorption is very limited. If the cavity is large, it will directly affect the volume of the mobile phone and cannot meet the needs of actual mobile phone products.

[0008] The use of foam or double-sided tape in the back shell for shock absorption has the following defects:

[0009] 1) It cannot be used in scenes with higher temperatures. When the temperature of the mobile phone is slightly higher, the foam / double-sided adhesive is prone to structural collapse, which reduces the shock absorption effect;

[0010] 2) Large pieces of foam / double-sided tape will release small organic molecules during the operation of the mobile phone, which may have an impact on human health;

[0011] 3) Due to the pore structure of the current foam / double-sided tape itself, it cannot effectively reduce the vibration.

[0012] Therefore, it is necessary to provide a handheld device and a shock absorbing component thereof to solve at least one of the above problems. Summary of the invention

[0013] In view of the defects existing in the prior art, the embodiments of the present invention provide a handheld device and a shock absorbing component thereof, which can minimize the vibration that has a negative impact on the user and improve the user experience while ensuring that the handheld device has a good sound quality.

[0014] The specific technical solution of the implementation mode of the present invention is:

[0015] A shock absorbing member of a handheld device, the handheld device comprises a rear cover and a main body which are connected to each other, the shock absorbing member is used to be arranged between the rear cover and the main body, the rear cover has an inner surface facing the main body, the main body comprises a sound module, the inner surface of the rear cover has a predetermined area facing the sound module of the main body; a predetermined gap is spaced between the predetermined area and the sound module, and the shock absorbing member of the handheld device comprises:

[0016] A sound-absorbing powder sheet, wherein the sound-absorbing powder sheet has a predetermined compression ratio, and the thickness of the sound-absorbing powder sheet in an initial state before compression is greater than the predetermined gap; the sound-absorbing powder sheet at least covers the predetermined area.

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

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

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

[0020] In a preferred embodiment, the circumferential outer contour of the sound-absorbing powder sheet is gap-matched 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 a preferred embodiment, the surface area of ​​the sound-absorbing powder sheet in contact with the inner surface of the rear cover accounts for more than 90% of the inner surface of the rear cover.

[0022] In a preferred 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 a preferred embodiment, the sound-absorbing powder sheet completely covers the inner surface of the back cover.

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

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

[0026] In a preferred embodiment, the co-formed fiber powder sheet comprises fibrous materials interwoven with each other and a porous powder material disposed on the fibrous materials.

[0027] In a preferred embodiment, the sound-absorbing powder sheet comprises: a main structure in a three-dimensional network interwoven structure, and a porous powder arranged on the surface of the main structure.

[0028] A handheld device comprises the shock absorbing component of any of the above handheld devices.

[0029] In a preferred embodiment, the shock absorbing member is fixed on the back cover, and / or the shock absorbing member is fixed on the main body.

[0030] In a preferred embodiment, the handheld device includes any one of the following: a mobile phone, a tablet computer, a smart watch, and a laptop computer.

[0031] The technical solution of the present invention has the following significant beneficial effects:

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

[0033] With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating the manner in which the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present invention include many changes, modifications and equivalents. Features described and / or shown for one embodiment can be used in one or more other embodiments in the same or similar manner, combined with features in other embodiments, or replace features in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the figures are only schematic, used to help understand the present invention, and are not specifically limited to the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to the teachings of the present invention.

[0035] Figure 1 A schematic diagram of the structure of a mobile phone provided in an embodiment of the present application;

[0036] Figure 2 An exploded diagram of a mobile phone provided in an embodiment of the present application;

[0037] Figure 3 This is a schematic diagram of the measured vibration velocity distribution of the rear cover obtained after the test of Scheme A;

[0038] Figure 4 This is a schematic diagram of the measured vibration velocity distribution of the rear cover obtained after the test of Scheme B;

[0039] Figure 5 This is a schematic diagram of the measured vibration velocity distribution of the rear cover obtained after the test of Scheme C;

[0040] Figure 6 This is a schematic diagram of the measured vibration acceleration distribution of the rear cover obtained after the test of Scheme A;

[0041] Figure 7 This is a schematic diagram of the measured vibration acceleration distribution of the rear cover obtained after the test of Scheme B;

[0042] Figure 8 Schematic diagram of the measured vibration acceleration distribution of the rear cover obtained after testing Scheme C.

[0043] Reference numerals of the present application:

[0044] 100. Mobile phone;

[0045] 001, back cover;

[0046] 002. Sound-absorbing powder flakes;

[0047] 003. Sound module;

[0048] 004. Subject. DETAILED DESCRIPTION

[0049] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0050] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When 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. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0052] The present invention provides a handheld device and a shock absorbing component thereof, which can reduce vibrations having negative effects on users as much as possible and improve the user experience while ensuring that the handheld device has good sound quality.

[0053] Please refer to Figure 1 to Figure 2 In the implementation of the present application, a shock absorbing member for a handheld device is provided. The handheld device may specifically include any one of the following: a mobile phone 100, a tablet computer, a smart watch, a laptop computer, etc. In addition, the handheld device may also be other electronic devices that require shock absorption. In the implementation of the present application, the handheld device is mainly taken as a mobile phone 100 as an example for illustration. When the handheld device is in other forms, the present application may be referred to.

[0054] The handheld device may include a rear cover 001 and a main body 004 connected to each other, the shock absorbing member is used to be arranged between the rear cover 001 and the main body 004, the rear cover 001 has an inner surface facing the main body 004, the main body 004 includes a sound module 003, the inner surface of the rear cover 001 has a predetermined area directly facing the sound module 003 of the main body 004; a predetermined gap is spaced between the predetermined area and the sound module 003, the shock absorbing member of the handheld device includes: a sound absorbing powder sheet 002, the sound absorbing powder sheet 002 has a predetermined compression ratio, the thickness of the sound absorbing powder sheet 002 in an initial state before compression is greater than the predetermined gap; the sound absorbing powder sheet 002 at least covers the predetermined area.

[0055] For the mobile phone 100, the main body 004 may include: a front shell of the mobile phone, a weight and a sound module 003, etc. The sound module 003 may include a speaker and a receiver.

[0056] In the implementation manner of the present application, the sound-absorbing powder sheet 002 is mainly filled in the gap between the back cover 001 and the main body 004. The sound-absorbing powder sheet 002 is specifically a shock-absorbing component with a small compression ratio. The thickness of the sound-absorbing powder sheet 002 in the initial state before compression is greater than the gap between the back cover 001 and the main body 004. When the sound-absorbing powder sheet 002 is filled between the back cover 001 and the main body 004, the advantages of the sound-absorbing powder sheet 002 itself and its cooperation with the back cover 001 and the main body 004 can be utilized to achieve an ideal vibration reduction effect.

[0057] Among them, the shock absorption effect of the sound-absorbing powder sheet 002 is brought about by its rich pore structure and large specific surface area. Taking zeolite + fiber as an example, zeolite itself is a material with rich pore structure (including micropores, mesopores, etc.), and in the process of preparing zeolite, due to its crystal structure defects, it brings more intercrystalline mesopores, macropores, etc. The staggered distribution of pores of different dimensions makes the air movement that brings the vibration quickly disappear in the aforementioned pores, thereby significantly reducing the hand-held vibration caused by the impact of air movement on the back cover 001. In addition, the staggered distribution between fibers will further enhance the aforementioned effect. The airflow impacts the fibers, causing the friction between the fibers and between the fibers and the zeolite, and the large pores between them to further slow down the impact of the airflow, reducing the hand-held vibration.

[0058] In this embodiment, the sound-absorbing powder sheet 002 may include any one of the following: a powder sheet, a composite material powder sheet, and a co-molded fiber powder sheet.

[0059] The composite material powder sheet is obtained by impregnating powder slurry with melamine sponge.

[0060] The co-molded fiber powder sheet includes mutually interwoven fibrous materials and porous powder materials arranged on the fibrous materials.

[0061] In one embodiment, the sound-absorbing powder sheet 002 includes: a main body 004 structure having a three-dimensional network interlaced structure, and a porous powder disposed on the surface of the main body 004 structure.

[0062] Of course, the specific composition and arrangement of the powder sheet may also be in other forms and are not limited to the above description. Technical personnel in the relevant field may make other changes inspired by the technical essence of this application, but as long as the functions and effects achieved are the same or similar to those of this application, they should be covered within the scope of protection of this application.

[0063] In this embodiment, the sound-absorbing powder sheet 002 is a sheet-like thin sheet with a predetermined outer contour shape. The sound-absorbing powder sheet 002 has a first surface and a second surface opposite to each other in the thickness direction. The first surface of the sound-absorbing powder sheet 002 is used to fit with the inner surface of the back cover 001, and the second surface of the sound-absorbing powder sheet 002 is used to fit with the main body 004.

[0064] Specifically, the sound-absorbing powder sheet 002 can be filled between the back cover 001 and the main body 004 by interference fit. When the sound-absorbing powder sheet 002 is filled between the back cover 001 and the main body 004 by interference fit, it can reliably ensure that the sound-absorbing powder sheet 002 is closely attached to the back cover 001 and the sound-absorbing powder sheet 002, thereby achieving an ideal sound-absorbing and shock-reducing effect.

[0065] In one embodiment, the predetermined compression ratio of the sound absorbing powder sheet 002 is between 1% and 10%.

[0066] When the compression ratio of the sound-absorbing powder sheet 002 is greater than 1%, and the compression ratio of the sound-absorbing powder sheet 002 is less than 10%, that is, the compression ratio of the sound-absorbing powder sheet 002 is within the above-mentioned specific compression ratio range, the sound-absorbing powder sheet 002 can play a shock-absorbing effect, but beyond this range, the shock-absorbing effect is significantly reduced. Specifically, when the compression ratio is too small / no, or even when there is a gap fit, the elasticity of the powder sheet's own structure is difficult to work in terms of shock absorption; and when the compression ratio is too large, the material pores are compressed completely, then the material's own rigidity increases significantly, and the originally beneficial pores can no longer play a role.

[0067] Furthermore, the predetermined compression ratio of the sound-absorbing powder sheet 002 is between 1% and 5%.

[0068] The compression ratio of the sound-absorbing powder sheet 002 is less than 5%, so that the sound-absorbing powder sheet 002 reaches a slightly compressed state. When the sound-absorbing powder sheet 002 reaches a slightly compressed state, its sound-absorbing and vibration-reducing effect is optimal.

[0069] In one embodiment, the circumferential outer contour of the sound-absorbing powder sheet 002 is gap-matched with the back cover 001 , and the overall contour of the sound-absorbing powder sheet 002 is adapted to the structure of the inner surface of the back cover 001 .

[0070] In this embodiment, the outer circumferential contour of the sound-absorbing powder sheet 002 can be matched with the inner surface of the back cover 001. For example, when the back cover 001 is a rectangle with rounded corners, the sound-absorbing powder sheet 002 can also be a rectangle with rounded corners.

[0071] In addition, when an opening is provided near a top corner on the back cover 001 for setting up modules such as a camera, the sound-absorbing powder sheet 002 can also be provided with an opening at the position of the opening, or a notch can be directly provided, so as to ensure that the sound-absorbing powder sheet 002 does not block the opening and cause interference.

[0072] Of course, the specific structure of the sound-absorbing powder sheet 002 may vary depending on the specific shape and structure of the back cover 001 of the handheld device to which it is applied, and the present application does not make any specific limitation here.

[0073] When the circumferential outer contour of the sound-absorbing powder sheet 002 is matched with the inner surface of the back cover 001 , it can reliably and effectively absorb the sound from the sound module 003 of the main body 004 toward the back cover 001 .

[0074] Specifically, the surface area of ​​the sound-absorbing powder sheet 002 accounts for more than 90% of the inner surface of the back cover 001 .

[0075] Theoretically, without affecting the assembly efficiency of the sound-absorbing powder sheet 002, the closer the surface area of ​​the sound-absorbing powder sheet 002 is to the area of ​​the inner surface of the back cover 001, the larger the sound-absorbing area that can be formed in the sound propagation direction between the sound module 003 of the main body 004 and the back cover 001, and the better the shock absorption effect. Therefore, the surface area of ​​the sound-absorbing powder sheet 002 that fits the inner surface of the back cover 001 can account for more than 90% of the inner surface of the back cover 001.

[0076] Taking into account that the sound-absorbing powder sheet 002 may have certain deformation requirements during the assembly process and the use process, for the case where the predetermined compression ratio of the sound-absorbing powder sheet 002 is between 1% and 10%, the surface area of ​​the sound-absorbing powder sheet 002 accounts for more than 90% of the inner surface of the back cover 001, which can be adapted to the compression ratio of the sound-absorbing powder sheet 002.

[0077] Specifically, when the sound-absorbing powder sheet 002 is compressed, the surface area of ​​the sound-absorbing powder sheet 002 may be able to expand and extend to a certain extent, and a new deformed surface area may be obtained. The outer contour shape of the sound-absorbing powder sheet 002 with the new surface area may be basically or completely the same as the inner surface of the back cover 001.

[0078] Furthermore, the surface area of ​​the sound-absorbing powder sheet 002 accounts for 95% to 99% of the inner surface of the back cover 001 .

[0079] Taking into account that the sound-absorbing powder sheet 002 may have certain deformation requirements during the assembly process and the use process, for the case where the predetermined compression ratio of the sound-absorbing powder sheet 002 is between 1% and 5%, when the surface area of ​​the sound-absorbing powder sheet 002 occupies 95% to 99% of the inner surface of the back cover 001, it can be adapted to the compression ratio of the sound-absorbing powder sheet 002.

[0080] In one embodiment, the sound absorbing powder sheet 002 completely covers the inner surface of the back cover 001 .

[0081] When the thickness of the sound-absorbing powder sheet 002 is equal to the predetermined gap, the sound-absorbing powder sheet 002 does not need to be compressed. In this case, the thickness of the sound-absorbing powder sheet 002 can be equal to the predetermined gap between the inner surface of the back cover 001 and the main body 004. When the sound-absorbing powder sheet 002 completely covers the inner surface of the back cover 001, a better sound-absorbing and vibration-reducing effect can be achieved.

[0082] The applicant has conducted experimental verification on the shock absorbing component of the handheld device provided in the embodiment of the present application. The applicant will illustrate the beneficial effects that can be achieved by the shock absorbing component of the handheld device provided in the present application in combination with specific experimental data.

[0083] For solution A, the vibration source: area 70mm2, 800Hz, sine single-sided amplitude 0.5mm. Back cavity: 4cc, air domain: length, width and height 150×60×0.4mm. Back cover 001: thickness 0.6mm, material FR4.

[0084] Scheme B is different from Scheme A in that foam is provided in the air domain.

[0085] Scheme C is different from scheme A in that a shock absorbing member (sound absorbing powder sheet 002 ) in the embodiment of the present application is provided in the air domain.

[0086] Please refer to Figure 3 , Figure 4 and Figure 5 , taking the vibration velocity in the middle as an example, it can be seen intuitively:

[0087] The vibration velocity in the middle of Scheme A is 6.1 m / s;

[0088] The vibration velocity in the middle of Scheme B is 4.1 m / s;

[0089] The vibration velocity in the middle of Scheme C is 1.7 m / s;

[0090] The three decrease in sequence, and solution C using the shock-absorbing member provided in the embodiment of the present application has the smallest vibration speed.

[0091] Please refer to Figure 6 , Figure 7 and Figure 8 , taking the vibration acceleration in the middle as an example, it can be seen intuitively:

[0092] The vibration acceleration in the middle of Scheme A is 18.5m / s 2 ;

[0093] The vibration acceleration in the middle of Scheme B is 12.1m / s 2 ;

[0094] The vibration acceleration in the middle of Scheme C is 5.8m / s 2 ;

[0095] The three decrease in sequence, and solution C using the shock-absorbing member provided in the embodiment of the present application has the smallest vibration acceleration.

[0096] A handheld device is also provided in an embodiment of the present application, and the handheld device includes the above-mentioned shock absorbing component. The handheld device can achieve the technical effect achieved by the shock absorbing component implementation embodiment by setting the shock absorbing component. For details, please refer to the specific description of the above-mentioned implementation embodiment, and the present application will not repeat them here.

[0097] The handheld device may include any one of the following: a mobile phone 100, a tablet computer, a smart watch, and a laptop computer.

[0098] Of course, the specific form of the handheld device is not limited to the above description. Technical personnel in the relevant field may make other changes inspired by the technical essence of this application. However, as long as the functions and effects achieved are the same or similar to those of this application, they should be covered within the scope of protection of this application.

[0099] In one embodiment, the shock absorbing member is fixed on the back cover 001 , and / or the shock absorbing member is fixed on the main body 004 .

[0100] The shock absorber can be fixed on the back cover 001, or can be fixed on the main body 004, or can be fixed on both the back cover 001 and the main body 004; or can be directly fixed between the back cover 001 and the main body 004 by interference fit. The specific fixed position of the shock absorber can be adaptively adjusted according to the different assembly requirements of the actual product, etc., and this application does not make any specific limitation here.

[0101] When the shock-absorbing component is fixed to the back cover 001 and / or the main body 004, it can be fixed at multiple points locally or the entire surface can be fixed. The specific fixing method is not specifically limited in this application.

[0102] It should be noted that, in the description of this application, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, and they cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0103] The above-mentioned various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0104] The above are only a few embodiments of the present invention. Although the embodiments disclosed by the present invention are as above, the contents are only embodiments adopted for facilitating the understanding of the present invention and are not used to limit the present invention. Any technician in the technical field to which the present invention belongs can make any modification and change in the form and details of the embodiments without departing from the spirit and scope disclosed by the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined by the attached claims.

Claims

1. A shock absorbing member for a handheld device, characterized in that: The handheld device comprises a rear cover and a main body connected to each other, the shock absorbing member is used to be arranged between the rear cover and the main body, 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 facing the sound module of the main body; There is a predetermined gap between the predetermined area and the sound module, and the shock absorbing member of the handheld device includes: The sound-absorbing powder sheet is in the form of a sheet with a certain thickness, has a predetermined compression ratio, and has an initial thickness before compression that is greater than the predetermined gap; the sound-absorbing powder sheet at least covers the predetermined area.

2. The shock absorbing member of the handheld device according to claim 1, characterized in that: The sound-absorbing powder sheet is filled between the rear cover and the main body in an interference fit manner.

3. The shock absorbing member of the handheld device according to claim 2, characterized in that: The predetermined compression ratio of the sound-absorbing powder sheet is between 1% and 10%.

4. The shock absorbing member of the handheld device according to claim 3, characterized in that: The predetermined compression ratio of the sound-absorbing powder sheet is between 1% and 5%.

5. The shock absorbing member of the handheld device according to claim 1, characterized in that: The circumferential outer contour of the sound-absorbing powder sheet is gap-matched 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.

6. The shock absorbing member of the handheld device according to claim 3, characterized in that: The surface area of ​​the sound-absorbing powder sheet that is in contact with the inner surface of the rear cover accounts for more than 90% of the area of ​​the inner surface of the rear cover.

7. The shock absorbing member of the handheld device according to 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 absorbing member of the handheld device according to claim 1, characterized in that: The sound-absorbing powder sheet completely covers the inner surface of the back cover.

9. The shock absorbing member of the handheld device according to claim 1, characterized in that: The sound-absorbing powder sheet includes any one of the following: a powder sheet, a composite material powder sheet, and a co-molded fiber powder sheet.

10. The shock absorbing member of the handheld device according to claim 9, characterized in that: The composite material powder sheet is obtained by impregnating powder slurry with melamine sponge.

11. The shock absorbing member of the handheld device according to claim 9, characterized in that: The co-formed fiber powder sheet includes fibrous materials interwoven with each other and a porous powder material arranged on the fibrous materials.

12. The shock absorbing member of the handheld device according to claim 1, characterized in that: The sound-absorbing powder sheet comprises: a main structure in a three-dimensional network interlaced structure, and porous powder arranged on the surface of the main structure.

13. A handheld device, characterized in that: The handheld device comprises the shock absorbing component of the handheld device according to any one of claims 1 to 12.

14. The handheld device according to claim 13, wherein: The shock absorbing member is fixed on the rear cover, and / or the shock absorbing member is fixed on the main body.

15. The handheld device according to claim 13, wherein: The handheld device includes any one of the following: a mobile phone, a tablet computer, a smart watch, and a laptop computer.

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