TWI499366B - Case of hand-held electronic device - Google Patents

Description

Handheld electronic device sheath

The present invention relates to a sheath for a handheld electronic device, and more particularly to a sheath for a handheld electronic device having a heat dissipation function.

Please refer to FIG. 1 for a sheath 9 of a hand-held electronic device disclosed in the "Mobile Phone Case" of the Republic of China Announcement No. M452536. The conventional sheath 9 is respectively combined on the inner and outer surfaces of a support plate. An inner protective layer and an outer decorative layer. Accordingly, when the existing sheath 9 is sleeved outside a handheld electronic device, the support plate and the inner protective layer can jointly provide a protection function, and the portable electronic device can be protected from scratching under normal use conditions. And when the portable electronic device is accidentally dropped or impacted, the chance of occurrence of screen cracking and deformation of the casing is reduced; at the same time, the existing sheath 9 can also exhibit a multi-style by its outer decorative layer. The pattern allows the existing sheath 9 to have a decorative effect to stimulate the consumer's willingness to purchase. The existing sheath 9 can also be provided with a plurality of penetrating circular holes 91 to form a three-dimensional touch with the outer decorative layer, thereby enhancing the sense of product value.

In addition, other such as the Republic of China Announcement No. M451861 "protective cover", M453334 "improved structure of mobile phone protective case", M453329 "mobile phone protective cover structure" and M453300 "sound-optimized portable electronic device" The patents of protective casings and the like also respectively disclose the sheaths of various existing hand-held electronic devices; in general, the existing sheaths are only added in addition to the functions of protection and decoration, and may be added. Additional additional features such as placing cards, optimizing sound effects, and stereo support for reading.

However, in order to enhance the market competitiveness, the current trend of high-performance handheld electronic devices has led to an increase in the heating temperature of handheld electronic devices, and the demand for thinner and lighter products has further compressed the electronic components. The heat dissipation space often causes overheating of the handheld electronic device during operation; at this time, if the handheld electronic device is covered with a sheath, the heat dissipation efficiency of the handheld electronic device is further reduced, and the performance is unstable. The situation affects the reliability of electronic products, and causes functional characteristics to decline, unable to play or even crash.

Therefore, the use of the sheath of any of the existing handheld electronic devices described above may affect the heat dissipation efficiency of the handheld electronic device during operation, but does not provide protection and reduce the probability of damage, thereby causing the user's A dilemma. On the other hand, with the above-mentioned conventional sheath 9, even if the plurality of circular holes 91 can serve as a passage for the airflow, the high-temperature airflow generated by the operation of the handheld electronic device can pass through the plurality of circular holes 91. The spillage to the outside, but when the handheld electronic device is placed on a flat surface (such as a desktop), the plurality of circular holes 91 will be completely enclosed and lose heat dissipation.

For the above reasons, the sheath of the existing hand-held electronic device does still have to be improved.

The object of the present invention is to provide a sheath for a handheld electronic device, which can also have the function of assisting heat dissipation to improve the heat dissipation efficiency of the handheld electronic device during operation.

Another object of the present invention is to provide a sheath for a hand-held electronic device that can effectively utilize the auxiliary heat dissipation function of the sheath even if the handheld electronic device equipped with the sheath is placed on a flat surface.

In order to achieve the foregoing objectives, the technical content of the present invention includes: a sheath for a handheld electronic device, comprising: a substrate having an opposite inner surface and an outer surface, the substrate being disposed through the inner surface and outside At least one air guiding opening of the surface, the substrate is further provided with an anti-shadowing structure, so that the air guiding opening to the circumference of the ring of the substrate An air duct for airflow is provided to maintain the air guiding port of the substrate to communicate with the outside; a positioning member is disposed on the circumference of the substrate to form an accommodation space with the substrate; and a fan module. Located in the accommodating space.

Wherein, the accommodating space can be divided into an electronic device housing and a fan chamber, and the inner surface of the positioning member is provided with a shoulder portion, and the extending plane of the shoulder portion is between the extending planes of the free end edges of the positioning member Forming the electronic device housing, the fan module is received in the fan chamber, and the fan chamber and the electronic device housing are stacked in an axial direction of the fan module.

The fan module includes a heat dissipation fan that is fixedly coupled to an inner surface of the substrate. Moreover, the fan module may further comprise a controller and a battery, the controller and the battery are combined and fixed on the inner surface of the substrate, and the controller electrically connects the cooling fan and the battery.

The cooling fan may be disposed at a position opposite to or adjacent to the air guiding port of the substrate.

Wherein, the positioning member is provided with at least one drainage opening, so that the fan chamber communicates with the outside.

The cooling fan may be a centrifugal fan having a main air inlet in the axial direction, the main air inlet facing the air guiding port of the substrate, and the cooling fan has an air outlet in a radial direction, the air outlet facing The drainage port of the positioning member.

Among them, the battery is preferably a rechargeable battery.

The sheath of the handheld electronic device may be further provided with a spacer that abuts against the shoulder to cover the fan module.

The cooling fan further has an auxiliary air inlet in the axial direction, and the spacer is provided with at least one through hole, and the through hole is axially opposite to the auxiliary air inlet of the heat dissipation fan.

The inner surface of the substrate faces the accommodating space, and the outer surface of the substrate is provided with at least one supporting protrusion to constitute the anti-shadowing structure, the outer surface of the substrate to the supporting convex The air duct is formed between the extending planes of the free end edges of the portions.

Alternatively, the substrate is wavy and has a relatively concave configuration at the arrangement of the heat dissipation fan to form the anti-shadow structure from the opposite protrusions of the substrate.

The substrate has at least one inner concave portion and at least one outer convex portion adjacent to each other to make the substrate have a wave shape, and the air passage is formed between a tangential plane of the inner concave portion and a tangential plane of the outer convex portion.

The number of the inner concave portions may be one, and the number of the outer convex portions may be two, the inner concave portion is located between the two outer convex portions, and the inner concave portion extends to the opposite sides of the substrate.

The inner surface of the substrate may be in a planar shape at a top portion corresponding to the inner concave portion for the heat radiating fan to be combined.

Alternatively, the substrate may have a convex arc shape and have a most protruding portion, so that the most protruding portion constitutes the anti-shadowing structure, and the air guiding opening of the substrate is disposed at a portion other than the most protruding portion, and the most convex portion The air duct is formed between the tangential plane of the exit portion and the periphery of the substrate ring on both sides of the most convex portion.

Wherein the substrate protrudes from the inner surface toward the outer surface, and the shortest distance of the inner surface of the substrate from the most protruding portion to the extending plane of the free end edge of the positioning member is greater than the inner surface from the side end to the positioning member freely The shortest distance of the extending plane of the end edge, and the shortest distance from the side end of the inner surface to the most convex portion is an increasing tendency.

The most protruding portion of the substrate may be located at the center of the substrate, and the number of air guiding openings of the substrate is several, and the plurality of air guiding openings are respectively disposed at two sides of the most protruding portion.

According to the foregoing structure, the sheath of the handheld electronic device can not only have the function of assisting heat dissipation, but also improve the heat dissipation efficiency of the handheld electronic device during operation, and can be used in the handheld electronic device equipped with the sheath. When placed on a flat surface, it still functions effectively to assist in heat dissipation.

〔this invention〕

1‧‧‧Substrate

1a‧‧‧ inner surface

1b‧‧‧ outer surface

11‧‧‧air guide

12‧‧‧Support convex

2‧‧‧ Positioning parts

21‧‧‧ Ring Wall

22‧‧‧Auxiliary Positioning Department

23‧‧‧ Shoulder

24‧‧‧Drainage

3‧‧‧Fan module

31‧‧‧ cooling fan

311‧‧‧ main air inlet

312‧‧‧Auxiliary air inlet

313‧‧‧air outlet

32‧‧‧ Controller

33‧‧‧Battery

4‧‧‧ spacer

41‧‧‧Perforation

5‧‧‧Substrate

5a‧‧‧ inner surface

5b‧‧‧ outer surface

51‧‧‧air guide

52‧‧‧ Inside recess

53‧‧‧Outer convex

6‧‧‧Substrate

6a‧‧‧ inner surface

6b‧‧‧ outer surface

61‧‧‧air guide

62‧‧‧The most protruding part

W‧‧‧ duct

S‧‧‧ accommodating space

S1‧‧‧Electronic device room

S2‧‧‧fan room

E‧‧‧Handheld electronic device

P‧‧‧ plane

[Use]

9‧‧‧ sheath

91‧‧‧ round hole

Figure 1: Schematic diagram of a prior art handheld electronic device sheath.

Fig. 2 is a perspective view showing the exploded structure of the first embodiment of the present invention.

Fig. 3 is a top plan view showing the first embodiment of the present invention.

Figure 4: Schematic diagram of the cross-sectional structure and assembly of the cross-section of Figure 4-4.

Figure 5 is a schematic view showing the implementation of the first embodiment of the present invention.

Figure 6 is a perspective exploded perspective view of a second embodiment of the present invention.

Figure 7: Figure 6-7 shows the cross-sectional structure and assembly of the line.

Figure 8 is a perspective view showing a perspective exploded structure of a third embodiment of the present invention.

Figure 9: Section 8 Figure 9-9 is a cross-sectional structure and assembly diagram.

The above and other objects, features, and advantages of the present invention will become more apparent from the aspects of the invention. The jacket can be used for mobile phones, tablets, handheld game consoles, music players, digital cameras, digital cameras and other handheld electronic devices, especially for mobile phones. Not limited to this.

Referring to FIGS. 2 and 3 , in a first preferred embodiment of the present invention, the sheath of the handheld electronic device of the present invention substantially includes a substrate 1 , a positioning member 2 and a fan module 3 , and the positioning member 2 is disposed on the circumference of the substrate 1 to enable the sheath to be coupled to a handheld electronic device. The fan module 3 is disposed on the inner side of the substrate 1. When the fan module 3 is in operation, the airflow can be guided. The substrate 1 is removed to assist in heat dissipation of the handheld electronic device. The substrate 1 and the positioning member 2 may be made of a material having good elasticity such as rubber, silicone or resin, or may be made of a hard material such as metal or plastic, and the invention is not limited thereto.

The substrate 1 has an opposite inner surface 1a and an outer surface 1b. The substrate 1 mainly corresponds to a backplane of the handheld electronic device. When the sheath is coupled to the handheld electronic device, the inner surface 1a of the substrate 1 faces the handheld The back panel of the electronic device. The substrate 1 is provided with at least one air guiding opening 11 extending through the inner surface 1a and the outer surface 1b, so that the space between the substrate 1 and the handheld electronic device can communicate with the outside, and the number, size and shape of the air guiding opening 11 It is not particularly limited, and the shape design of the air guiding port 11 can be arbitrarily changed to improve the decorative effect of the sheath under the premise that sufficient air guiding effect can be provided. In addition, the substrate 1 can also be designed according to a camera, a speaker or a function key of the handheld electronic device, and can be understood by those skilled in the art, so that the substrate 1 should not be subjected to the drawings of the present invention. The structural form of the disclosure is limited.

It should be noted that the substrate 1 of the sheath is further provided with an anti-shadowing structure, so that the air duct W (as shown in FIG. 5) is provided between the air guiding port 11 and the circumference of the ring of the substrate 1 (as shown in FIG. 5). The air guiding port 11 of the substrate 1 is kept in communication with the outside world, so that when the handheld electronic device with the sheath is placed on a plane (for example, a table top), the air guiding port 11 is shielded and the heat dissipation function is lost. In this embodiment, the substrate 1 may be provided with at least one supporting protrusion 12 on the outer surface 1b thereof to constitute the anti-shading structure, and the plurality of supporting protrusions 12 provide the effect of raising the substrate 1 so that the substrate 1 The air passage W can be formed between the outer surface 1b of the substrate 1 to the plane of extension of the free end edge of the support protrusion 12 (overlapping the plane in which the sheath is placed).

More specifically, please refer to FIG. 5 , the support protrusion 12 may be additionally bonded to the substrate of the substrate 1 by means of bonding, screwing, riveting or even welding, or may be integrally formed with the substrate 1 . The resulting convex structure. In addition, when the number of the supporting protrusions 12 is one or two, an angle is formed between the substrate 1 and the plane P, so that the handheld electronic device and the sheath are obliquely placed on the plane P; When the number of the supporting protrusions 12 is three or more, the substrate 1 and the plane P may be parallel to each other, so that the handheld electronic device and the sheath can be laid flat on the plane P; The number of the supporting protrusions 12 is preferably three, to provide a more stable supporting effect.

The positioning member 2 is disposed on the circumference of the substrate 1 and is mainly used for combining with the handheld electronic device. For example, when the positioning member 2 is made of a material with better elasticity such as silicone rubber, the positioning member 2 may be a ring wall formed on the circumference of the ring of the substrate 1, and the inner circumferential surface of the ring wall and the ring The inner surface 1a of the substrate 1 is extended, and an inner hook shape is formed at the free end of the positioning member 2 to enhance the stability of the bonding to the handheld electronic device; when the positioning member 2 is made of, for example, metal or plastic When the hard material is made, the positioning member 2 may be a plurality of claw pieces arranged on the circumference of the ring of the substrate 1, and the inner circumferential surfaces of the plurality of claw pieces are extended to the inner surface 1a of the substrate 1, or As shown in the figure of the embodiment, the positioning member 2 is formed as a ring wall portion 21 formed on the circumference of the ring of the substrate 1, and the inner circumferential surface of the ring wall portion 21 is extended to the inner surface 1a of the substrate 1. And a plurality of auxiliary positioning portions 22 are disposed at the free end of the positioning member 2, so that the positioning member 2 can be covered by the annular wall portion 21 at the side edge of the handheld electronic device, and the auxiliary positioning portions 22 are The card is attached to the front side of the handheld electronic device to enable the sheath to be securely coupled to the handheld electronic device.

The locating member 2 can form an accommodating space S with the substrate 1 and the inner surface 1a of the substrate 1 faces the accommodating space S for accommodating the fan module 3 and the handheld electronic device. The positioning member 2 can be combined with the substrate 1 by any combination or integrally formed with the substrate 1. The invention is not limited. More specifically, with reference to FIG. 4, the accommodating space S formed by the positioning member 2 and the substrate 1 can be further divided into an electronic device housing S1 and a fan housing S2; The positioning member 2 may be provided with a shoulder portion 23 on the inner surface thereof to form the electronic device housing S1 between the extending plane of the shoulder portion 23 and the extending plane of the free end edge of the positioning member 2. The handheld electronic device is disposed, and the back plate of the handheld electronic device is abutted against the shoulder portion 23; the fan chamber S2 is configured to receive the fan module 3, and the fan chamber S2 and the electronic device The chambers S1 are stacked in the axial direction of the fan module 3. The positioning member 2 is further provided with at least one drainage opening 24, so that the fan chamber S2 can communicate with the outside; that is, when the positioning member 2 is in the shape of a ring wall, the drainage opening 24 can penetrate through the positioning member 2, Through holes in the outer surface.

The fan module 3 of the present embodiment may include a heat dissipation fan 31, a controller 32, and a battery 33. The heat dissipation fan 31, the controller 32, and the battery 33 may be combined and fixed on the inner surface of the substrate 1. 1a, and the combination is not limited, the controller 32 is electrically connected to the cooling fan 31 and the battery 33, so that when there is a heat dissipation requirement, the battery 33 provides power to drive the cooling fan 31 to operate. The cooling fan 31 is preferably disposed at a position opposite to or adjacent to the air guiding opening 11 to improve heat dissipation efficiency. In addition, the cooling fan 31 can be selected as a centrifugal fan, and is preferably a double-sided air inlet centrifugal fan; the cooling fan 31 has a main air inlet 311 and an auxiliary air inlet 312 in the axial direction, and The main air inlet 311 is preferably oriented toward the air guiding opening 11 of the substrate 1. The cooling fan 31 has an air outlet 313 in the radial direction, and the air outlet 313 preferably faces the drainage opening 24 of the positioning member 2. The battery 33 can be a primary battery or a rechargeable battery, and a rechargeable battery is preferably used so that the user can charge it from outside the sheath, thereby avoiding the need to repeatedly disassemble the sheath to improve ease of use.

In addition, the fan chamber S2 can accommodate other electronic devices (such as a backup power source, a speaker, a flash, etc.) in addition to the fan module 3 to provide different additional functions; for example, When the fan chamber S2 is further provided with a backup power source, the backup power source can be electrically connected to the battery of the handheld electronic device housed in the electronic device housing S1 to charge the battery of the handheld electronic device; Alternatively, the backup power source can also be electrically connected to the battery 33 of the fan module 3 to charge the battery 33. Moreover, the backup power source can be formed in a detachable form to facilitate the user to take out the charging from the fan chamber S2, and the power consumption of the battery of the handheld electronic device or the battery 33 of the fan module 3. When the battery is exhausted, the backup power source is placed in the fan chamber S2 to supply power to the handheld electronic device or the fan module 3. Accordingly, the backup power source has the function of the mobile power source, and the standby power source can be accommodated in the fan chamber S2, thereby eliminating the need for additional space when using the conventional mobile power source.

The cover can also be provided with a spacer 4 to protect the fan module 3 from damage. The spacer 4 can abut the shoulder 23 to cover the fan module 3 (in particular, the fan module 3 is covered). The controller 32 is mainly used to avoid the problem that the user inadvertently presses the fan module 3 when the sheath is installed. It should be noted that when the sheath is provided with the spacer 4, the spacer 4 abuts against the shoulder 23, and the handheld electronic device is attached to the other side of the spacer 4 without The shoulder 23 is in contact. When the spacer 4 is also covered by the heat dissipation fan 31 of the fan module 3, the spacer 4 can be provided with at least one through hole 41, and the through hole 41 and the auxiliary air inlet 312 of the heat dissipation fan 31 are axially disposed. Relatively, to achieve the effect of assisting the wind.

Referring to FIG. 5, according to the foregoing structure, the sheath of the present invention can be coupled to a handheld electronic device E, and guide the airflow in the accommodating space S when the cooling fan 31 of the fan module 3 operates. The venting opening 24 of the locating member 2 is discharged to the outside, so that the accommodating space S forms a negative pressure, thereby guiding the external airflow to flow into the accommodating space S through the air guiding opening 11 of the substrate 1; thus, the sheath The external low-temperature air can flow into the accommodating space S to discharge the high-temperature airflow generated by the operation of the handheld electronic device E from the accommodating space S, thereby improving the heat dissipation efficiency of the handheld electronic device E; Therefore, the use of the sheath of the present invention not only provides a protection function for the handheld electronic device E, but also enhances the heat dissipation efficiency of the handheld electronic device E, so that the handheld electronic device E does not overheat when it operates. In addition, even if the handheld electronic device E equipped with the sheath is placed on the plane P, the sheath can still be supported by the shielding structure of the substrate 1 (ie, the supporting convex portion disposed on the outer surface 1b of the substrate 1). The portion 12) provides a heightening effect so that a space communicating with the outside can be left between the outer surface 1b of the substrate 1 and the plane P, and the air passage W is formed to allow airflow to flow; thus, the substrate 1 The air guiding port 11 is not shielded, so that the cooling fan 31 of the fan module 3 can smoothly guide the airflow into and out of the accommodating space S, so that the heat dissipation efficiency of the handheld electronic device E is not affected. The sheath can effectively perform its function of assisting heat dissipation.

Please refer to FIGS. 6 and 7 for a second preferred embodiment of the sheath of the present invention. This embodiment is substantially the same as the first embodiment described above, and the difference mainly lies in the form of the substrate 5; The substrate 5 is substantially wavy, and has a relatively concave shape at the heat dissipating fan 31. The anti-shadowing structure is formed by the opposite convex portions of the substrate 5 to ensure that the air guiding port 51 of the substrate 5 is not shielded.

In more detail, the substrate 5 is provided with at least one air guiding opening 51 extending through the inner surface 5a and the outer surface 5b. The substrate 5 has adjacent at least one inner concave portion 52 and at least one outer convex portion 53 to make the substrate 5 The air can be formed in a wave shape, and the air passage W is formed between the tangent plane of the inner concave portion 52 and the tangent plane of the outer convex portion 53; the number of the inner concave portion 52 and the outer convex portion 53 is not special Limiting, the handheld electronic device and the sheath can be tilted or laid flat on the plane P. In this embodiment, the substrate 5 can have an inner concave portion 52 and two outer convex portions 53 . The inner concave portion 52 is located between the two outer convex portions 53 , and the inner concave portion 52 extends through the opposite sides of the substrate 5 . On the other hand, the inner surface 5a of the substrate 5 is preferably disposed in a planar shape at a top portion corresponding to the inner concave portion 52, so that the heat dissipation fan 31 of the fan module 3 can be stably coupled to the substrate 5 Inner surface 5a. Accordingly, the sheath can also improve the heat dissipation efficiency of the handheld electronic device during operation, and the anti-shadow structure of the substrate 5 when the handheld electronic device equipped with the sheath is placed on the plane P. (that is, the inner concave portion 52 and the outer convex portion 53 provided on the substrate 5) provide a heightening effect, so that a space communicating with the outside can be left between the outer surface 5b of the substrate 5 and the plane P (ie, the aforementioned wind The passage W) allows the heat dissipation fan 31 of the fan module 3 to smoothly guide the airflow, so that the jacket can effectively perform its function of assisting heat dissipation.

Referring to Figures 8 and 9, a third preferred embodiment of the sheath of the present invention is substantially the same as the first embodiment described above, the difference being mainly in the form of the substrate 6; The substrate 6 is convexly curved to form the anti-shadowing structure, so that the sheath can be substantially boat-shaped, and the air guiding port 61 is disposed at the ship's side (ie, the portion other than the most protruding portion of the substrate 6), thereby avoiding the guide. The effect that the tuyere 61 is shielded.

More specifically, the substrate 6 is provided with at least one air guiding opening 61 extending through the inner surface 6a and the outer surface 6b. The substrate 6 protrudes from the inner surface 6a toward the outer surface 6b and has a most protruding portion 62 for the substrate The inner surface 6a of the 6 extends from the most protruding portion 62 to the free end edge of the positioning member 2 The shortest distance of the face is greater than the shortest distance of the inner surface 6a from the side end to the extending plane of the free end edge of the positioning member 2, and the shortest distance from the side end of the inner surface 6a to the most protruding portion 62 is increasing That is, when the sheath is placed on the plane P, the most protruding portion 62 of the substrate 6 is in contact with the plane P, so that the tangent plane of the most convex portion 62 is to the most convex portion 62. The air passage W is formed between the circumferential edges of the substrate 6 on both sides, so that the substrate 6 does not contact the plane P at the portions on both sides of the most protruding portion 62. Preferably, the most protruding portion 62 of the substrate 6 is selectively located at the center of the substrate 6. The number of the air guiding openings 61 of the substrate 6 is several, and the plurality of air guiding openings 61 are respectively disposed at the two of the most protruding portions 62. side. Accordingly, the sheath can also improve the heat dissipation efficiency of the handheld electronic device during operation, and the anti-shadow structure of the substrate 6 when the handheld electronic device equipped with the sheath is placed on the plane P. (that is, the most protruding portion 62 of the substrate 6) is in contact with the plane P, so that the air guiding port 61 of the substrate 6 is kept unobstructed, so that the cooling fan 31 of the fan module 3 can smoothly guide the airflow. The sheath can effectively perform its function of assisting heat dissipation.

In summary, the sheath of the handheld electronic device of the present invention can be provided with a fan module, so that the sheath has the functions of auxiliary heat dissipation in addition to the basic functions of protection and decoration, so as to enhance the hand-held type. The heat dissipation efficiency of the electronic device during operation.

The jacket of the handheld electronic device of the present invention can ensure that the air guiding port is not shielded by the anti-shadowing structure even if the handheld electronic device equipped with the sheath is placed on a plane, so that the heat dissipation of the fan module The fan is able to maintain a smooth airflow, so that the jacket can effectively perform its function of assisting heat dissipation.

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

1‧‧‧Substrate

1a‧‧‧ inner surface

1b‧‧‧ outer surface

11‧‧‧air guide

12‧‧‧Support convex

2‧‧‧ Positioning parts

21‧‧‧ Ring Wall

22‧‧‧Auxiliary Positioning Department

23‧‧‧ Shoulder

24‧‧‧Drainage

3‧‧‧Fan module

31‧‧‧ cooling fan

311‧‧‧ main air inlet

312‧‧‧Auxiliary air inlet

313‧‧‧air outlet

32‧‧‧ Controller

33‧‧‧Battery

4‧‧‧ spacer

41‧‧‧Perforation

S‧‧‧ accommodating space

S1‧‧‧Electronic device room

S2‧‧‧fan room

Claims (18)

A sheath for a handheld electronic device, comprising: a substrate having an opposite inner surface and an outer surface, the substrate being provided with at least one air guiding opening extending through the inner surface and the outer surface, the substrate further providing an anti-shadow The structure is configured to maintain a air passage for the airflow between the air guiding port and the circumference of the ring of the substrate to maintain the air guiding port of the substrate to communicate with the outside; a positioning member is disposed on the circumference of the substrate to the substrate Together, a housing space is formed; and a fan module is disposed in the accommodating space. The jacket of the handheld electronic device of claim 1, wherein the accommodating space is divided into an electronic device housing and a fan chamber, and the inner surface of the positioning member is provided with a shoulder. Forming the electronic device housing between the extending plane of the shoulder and the extending plane of the free end edge of the positioning member, the fan module is received in the fan chamber, and the fan chamber is in the same room as the electronic device The fan modules are stacked in the axial direction. The sheath of the handheld electronic device of claim 2, wherein the fan module comprises a heat dissipating fan that is fixedly coupled to an inner surface of the substrate. The jacket of the handheld electronic device of claim 3, wherein the fan module further comprises a controller and a battery, the controller and the battery are combined and fixed on the inner surface of the substrate, the control The device electrically connects the cooling fan and the battery. The sheath of the handheld electronic device of claim 3, wherein the heat dissipating fan is disposed at a position opposite to or adjacent to the air guiding opening of the substrate. The sheath of the handheld electronic device of claim 3, wherein the positioning member is provided with at least one drainage opening to allow the fan chamber to communicate with the outside. The jacket of the handheld electronic device of claim 6, wherein the cooling fan is a centrifugal fan, and the cooling fan has a main air inlet in the axial direction, and the main air inlet is directed toward the substrate. The air outlet has an air outlet in a radial direction, and the air outlet faces the drainage opening of the positioning member. The sheath of the handheld electronic device of claim 4, wherein the battery is a rechargeable battery. The jacket of the handheld electronic device of claim 4 is further provided with a spacer that abuts against the shoulder to cover the fan module. The jacket of the handheld electronic device of claim 9, wherein the cooling fan further has an auxiliary air inlet in the axial direction, and the spacer is provided with at least one perforation, the perforation and the auxiliary of the cooling fan. The air inlets are axially opposite. The sheath of the handheld electronic device according to any one of the preceding claims, wherein the inner surface of the substrate faces the accommodating space, and the outer surface of the substrate is provided with at least one supporting protrusion. The air shield is formed between the outer surface of the substrate and the extending plane of the free end edge of the support protrusion. The sheath of the handheld electronic device according to any one of claims 3 to 10, wherein the substrate is wavy, and is disposed in a relatively concave manner at the arrangement of the heat dissipating fan to be The anti-shadowing structure is formed at a relatively convex portion. The sheath of the handheld electronic device of claim 12, wherein the substrate has at least one inner concave portion and at least one outer convex portion adjacent to each other, so that the substrate is wavy, and the inner concave portion is cut. The air duct is formed between the plane and the tangent plane of the outer convex portion. The sheath of the handheld electronic device of claim 13, wherein the number of the inner recesses is one, and the number of the outer convex portions is two, and the inner concave portion is located between the two outer convex portions. And the inner recess extends through opposite sides of the substrate. The sheath of the handheld electronic device of claim 14, wherein the inner surface of the substrate is in a planar configuration at a top portion corresponding to the inner recess for the heat radiating fan to be coupled. The sheath of the handheld electronic device according to any one of claims 1 to 10, wherein the substrate has a convex arc shape and has a most convex portion, wherein the most protruding portion constitutes the In the anti-shadowing structure, the air guiding opening of the substrate is disposed at a portion other than the most protruding portion, and the air tangential path is formed between the tangential plane of the most protruding portion and the periphery of the substrate ring on both sides of the most protruding portion. The sheath of the handheld electronic device of claim 16, wherein the substrate protrudes from the inner surface toward the outer surface, and the inner surface of the substrate extends from the most protruding portion to the free end edge of the positioning member. The shortest distance of the extending plane is greater than the shortest distance of the inner surface from the side end to the extending plane of the free end edge of the positioning member, and the shortest distance from the side end of the inner surface to the most protruding portion is in an increasing trend. The jacket of the handheld electronic device of claim 16, wherein the most protruding portion of the substrate is located at a center of the substrate, and the number of air guiding openings of the substrate is several, and the plurality of air guiding ports are respectively disposed at Both sides of the most protruding portion.