CN110611730A

CN110611730A - Protective shell, manufacturing method thereof and electronic device

Info

Publication number: CN110611730A
Application number: CN201910854441.0A
Authority: CN
Inventors: 龚世川; 林楚乔
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-09-10
Filing date: 2019-09-10
Publication date: 2019-12-24

Abstract

The application discloses a protective shell, a manufacturing method of the protective shell and electronic equipment. Specifically, this application provides a protective housing, includes: the protective case comprises a first protective case and a second protective case, wherein the first protective case is provided with a main body part and a side wall part extending from the edge of the main body part, the main body part is provided with a first surface and a second surface which are arranged oppositely, and the side wall part extends towards the direction of the second surface far away from the first surface; and a second protective case provided on a side of the second face away from the first face, the second protective case covering the main body portion and at most a part of the side wall portion of the first protective case, wherein a material forming the first protective case and a material forming the second protective case are not identical. From this, after first protective housing and the range upon range of setting of second protective housing that different materials formed, this protective housing can compromise intensity and use and feel, and the surface is difficult to scrape the flower, and the outward appearance uniformity is better, and comprehensive properties is good.

Description

Protective shell, manufacturing method thereof and electronic device

Technical Field

The application relates to the field of electronic equipment manufacturing, in particular to a protective shell, a manufacturing method of the protective shell and electronic equipment.

Background

With the development of science and technology, electronic products such as mobile phones and the like are widely applied in daily life and work. The protective shell can be sleeved on the outer side of electronic products such as a mobile phone, the protective shell can protect the electronic products such as the mobile phone, the functions of preventing falling, scraping, water and shock are achieved, the appearance of the electronic products such as the mobile phone can be enriched through the protective shell, and the personalized requirements of users are met.

However, the plastic protective shell, the manufacturing method thereof and the electronic device still need to be improved.

Disclosure of Invention

The present application is based on the discovery and recognition by the inventors of the following facts and problems:

the inventor finds that the existing plastic protective shell (such as a mobile phone protective shell) used in the electronic equipment has the problem that hardness strength, holding hand feeling, wear resistance and the like cannot be compatible, and the usability of the plastic protective shell is influenced. Therefore, if a new protective case for an electronic device (e.g., a mobile phone) can be provided, which has high strength and hardness, can protect the electronic device well, is not easy to scratch, has good hand feeling for holding, and has good appearance consistency and appearance effect, the above-mentioned problems can be solved to a great extent.

The present application is directed to solving, at least to some extent, one of the technical problems in the related art.

In one aspect of the present application, a protective case is presented. This protective housing includes: the protective case comprises a first protective case and a second protective case, wherein the first protective case is provided with a main body part and a side wall part extending from the edge of the main body part, the main body part is provided with a first surface and a second surface which are arranged oppositely, and the side wall part extends towards the direction of the second surface far away from the first surface; and a second protective case provided on a side of the second face remote from the first face, the second protective case covering the main body portion and at most a part of the side wall portion of the first protective case, wherein a material forming the first protective case and a material forming the second protective case are not identical. From this, after first protective housing and the range upon range of setting of second protective housing that different materials formed, this protective housing can compromise intensity and use and feel, and the flower is difficult to scraped to the surface, and the outward appearance uniformity is better, and comprehensive properties is good.

In another aspect of the present application, a method of making a protective case is presented. The method comprises the following steps: forming a second protective shell through second injection molding treatment; forming a first protective shell on one side of the second protective shell through a first injection molding process so as to form the protective shell, wherein the first protective shell is provided with a main body part and a side wall part extending from the edge of the main body part, the main body part is provided with a first face and a second face which are arranged oppositely, the side wall part extends towards the direction of the second face far away from the first face, the second protective shell covers the main body part and at most a part of the side wall part, and the material for forming the first protective shell and the material for forming the second protective shell are not identical. Therefore, the method can simply and conveniently obtain the protective shell with both strength and use hand feeling, and the protective shell is not easy to scratch, has better appearance consistency and better use performance.

In yet another aspect of the present application, a protective case is presented. The protective shell is formed by the method described above. Therefore, the protective shell has all the characteristics and advantages of the protective shell manufactured by the method, and the description is omitted. Generally speaking, this protective housing can compromise intensity and use and feel to the difficult flower of scraping of table second, the outward appearance uniformity is better, performance preferred.

In yet another aspect of the present application, an electronic device is presented. The electronic device includes: a housing defining an accommodating space; the main board and the memory are positioned in the accommodating space; the screen is arranged in the accommodating space and is connected with the main board; the protective shell or the protective shell manufactured by the method is sleeved on the shell, and the second protective shell is in contact with the shell. Therefore, the electronic device has all the features and advantages of the protective shell or the protective shell manufactured by the method, which are not described herein again. Generally speaking, the protective shell can better protect the electronic equipment, can also improve the holding hand feeling of the electronic equipment, and has good appearance effect and better use performance.

Drawings

FIG. 1 shows a schematic structural view of a protective case according to one example of the present application;

FIG. 2 shows a schematic cross-sectional structure of a protective case according to an example of the present application;

FIG. 3 shows a schematic structural view of a protective case according to another example of the present application;

FIG. 4 shows a flow chart of a method of making a protective case according to one example of the present application;

FIG. 5 shows a flow chart of a method of making a protective case according to another example of the present application; and

fig. 6 shows a flow chart of a method of making a protective case according to yet another example of the present application.

Description of reference numerals:

100: a protective shell; 110: a first protective case; 120: a second protective shell; 130: a first opening; 140: a second opening; 10: a main body portion; 11: a first side; 12: a second face; 20: a sidewall portion.

Detailed Description

Examples of the present application are described in detail below and are illustrated in the accompanying drawings. The examples described below with reference to the drawings are illustrative and intended to be used for explaining the present application and are not to be construed as limiting the present application.

In one aspect of the present application, a protective case is presented. According to some examples of the present application, referring to fig. 1 and fig. 2 (fig. 2 is a schematic cross-sectional structure along the direction AA' in fig. 1), the protective case 100 includes a first protective case 110 and a second protective case 120, wherein the first protective case 110 has a main body portion 10 and a sidewall portion 20 extending from an edge of the main body portion 10, the main body portion 10 has a first face 11 and a second face 12 disposed opposite to each other, and the sidewall portion 20 extends toward the second face 12 in a direction away from the first face 11; the second protective shell 120 is disposed on a side of the second face 12 away from the first face 11, and the second protective shell 120 covers the main body portion 10 and at most a part of the side wall portion 20 of the first protective shell 110, wherein a material forming the first protective shell 110 and a material forming the second protective shell 120 are not identical. Therefore, after the first protective shell 110 and the second protective shell 120 which are made of different materials are stacked, the protective shell 100 can have both strength and use hand feeling, the outer surface is not prone to scratching, the appearance consistency is good, and the comprehensive performance is good.

In addition, the "main body portion 10" of the first protective casing 110 is shown in fig. 1 and 2, and is a portion corresponding to the first protective casing 110 and a battery cover (back cover) of an electronic device (not shown), for example, the main body portion 10 may have a rectangular parallelepiped structure; the "side wall portion 20" of the first protection shell 110 is shown in fig. 1 and fig. 2, and is a portion of the first protection shell 110 corresponding to a middle frame of an electronic device (not shown), for example, the side wall portion 20 extends from the main body 10 and forms an included angle (for example, an included angle of 90 degrees) with a plane where the main body 10 is located, and the side wall portion 20 may include two first side walls oppositely disposed along a length direction of the main body 10, two second side walls oppositely disposed along a width direction of the main body, and the like.

For ease of understanding, the following is a brief explanation of the principle by which the protective case 100 according to the example of the present application can achieve the above-described advantageous effects:

as described above, the plastic protective cases (e.g., pure PC mobile phone protective cases, pure TPU mobile phone protective cases, etc.) used in electronic devices at present have the problem that hardness strength, hand-holding feeling, wear resistance, etc. cannot be considered at the same time, and even if the protective cases are made of PC materials for the main body surface and TPU materials for the side walls, the problems that the main body surface of the protective cases is easily scratched, the protective cases are easily degummed and broken, and the appearance uniformity of the protective cases is poor, etc. still exist. In the protective case 100 of the present application, the protective case 100 is formed by using the first protective case 110 and the second protective case 120 which are stacked, that is, the second protective case 120 is disposed on the inner side of the first protective case 110 (refer to the "inner" direction shown in fig. 2, the inner side is the side of the protective case 100 close to the electronic device when in use, and the outer side is the side of the protective case 100 facing the outside when in use), and the materials forming the first protective case 110 and the second protective case 120 are different, for example, a soft rubber material (i.e., a high molecular material with better flexibility, such as a thermoplastic elastomer (TPU), etc.) may be used to form the first protective case 110, and a hard rubber material (i.e., a high molecular material with higher hardness, such as Polycarbonate (PC), etc.) may be used to form the second protective case 120. The second protective shell 120 covers the main body 10 and at least a part of the sidewall 20 of the first protective shell 110, and the second protective shell 120 has better strength and hardness, so that the electronic device can be better protected; the first protective shell 110 is located outside the second protective shell 120, so that the protective shell 100 is not easily scratched, and the use performance of the protective shell 100 is improved; moreover, the side wall part 20 of the first protective shell 110 formed by the soft rubber material can improve the holding and keying comfort of the user, and improve the user experience; moreover, the appearance of the protective shell 100 is consistent, that is, the outer sides of the protective shell 100 are the first protective shell 110, and there is no boundary line of different materials, so that the appearance effect of the protective shell 100 is further improved.

According to some examples of the present application, the first protective shell 110 may be formed of a first material and the second protective shell 120 may be formed of a second material, wherein the hardness of the second material is greater than the hardness of the first material. That is, the second protective casing 120 located inside the protective casing 100 is made of the second material with greater hardness, and the second protective casing 120 has better strength and hardness, so as to better protect and support the electronic device; adopt the less first material of hardness to form the first protective housing 110 that is located the protective housing 100 outside, this first protective housing 110's pliability is better, is difficult for being scraped the flower, and this first protective housing 110 grips and the button is felt good, consequently, this protective housing 100 can compromise intensity and use and feel, and the surface is difficult to scrape the flower, and comprehensive properties is good.

According to some examples of the present invention, the shore hardness of the first material may be 85-95A, for example, 87A, 90A, 92A, 94A, etc., and when the shore hardness of the first material is in the above range, the formed first protective shell 110 has good usability, that is, the first protective shell 110 is not easily scratched, and has good hand-holding feeling, so that the usability of the protective shell 100 is improved, and the user experience is improved. When the shore hardness of the first material is small (for example, less than 85A), the formed first protective shell is soft, and the surface is easily scratched; when the shore hardness of the first material is large (for example, greater than 90A), the formed first protective shell is hard, the use hand feeling is affected, and the injection molding is not facilitated.

According to some examples of the present application, as previously described, the first protective shell 110 may be formed using a soft rubber material, for example, the first material forming the first protective shell 110 may include a thermoplastic elastomer, for example, at least one of a thermoplastic polyurethane elastomer (TPU), a thermoplastic rubber (TPR), and a polypropylene-modified polycarbonate. Therefore, the first protective shell 110 formed by the materials is not easy to scratch on the surface, has better hand feeling for holding and pressing keys and has good service performance. Specifically, the thickness of the first protective shell 110 may be 0.5 to 0.7mm, for example, 0.55mm, 0.6mm, or 0.65mm, and thus, when the thickness of the first protective shell 110 is within the above range, the protective shell 100 may be well prevented from being scratched, the holding hand feeling of a user may be improved, and the light and thin design of the protective shell 100 may be facilitated, so that the appearance effect of the protective shell 100 may be further improved.

According to some examples of the present application, as mentioned above, the second protective casing 120 may be formed of a hard glue material, for example, the second material forming the second protective casing 120 may include at least one of Polycarbonate (PC) and polymethyl methacrylate (PMMA), so that the second protective casing 120 formed of the above materials has better strength and hardness, and may better protect electronic devices. Specifically, the thickness of the second protective shell 120 may be 0.6 to 0.9mm, for example, 0.65mm, 0.7mm, 0.75mm, 0.8mm, and the like, so that the second protective shell 120 having the thickness has better strength and hardness, and can better protect electronic devices, and when the thickness of the second protective shell 120 is within the above range, the second protective shell is favorable for injection molding, is not easy to generate injection deformation, and the like, and further improves the appearance effect and the usability of the second protective shell 120.

According to some examples of the present application, the first protective shell 110 may have a first texture therein, for example, the first texture may be formed on the surface of the first protective shell 110 at the same time when the first protective shell 110 is formed by injection molding; the second protective case 120 has a second texture therein, and likewise, the second texture may be formed on the surface of the second protective case 120 at the same time when the second protective case 120 is injection-molded, and the first texture and the second texture may not be identical. Therefore, the first texture and the second texture are mutually overlapped, so that a rich texture effect can be formed, and the appearance effect of the protective shell 100 is further improved. Specifically, the specific type of the first texture and the second texture is not particularly limited, for example, the first texture may be a highlight dot texture, the second texture may be a dermatoglyph texture, and the like, and thus, the first texture and the second texture are superimposed to form a good appearance effect.

According to some examples of the present application, referring to fig. 3, the protective case 100 may have a first opening 130 and a second opening 140 therein, wherein the first opening 130 is located in the body portion 10 of the first protective case 110 and penetrates through the body portion 10 of the first protective case 110 and a portion of the second protective case 120 covering the body portion 10, and the second opening 140 is located in a sidewall portion of the first protective case 110 and penetrates through the first protective case 110. Specifically, as will be understood by those skilled in the art, the first opening 130 may include an opening corresponding to a rear cover of a battery of an electronic device (e.g., a mobile phone), for example, the first opening 130 may include a camera opening, a flash opening, and the like; the second opening 140 may include an opening corresponding to a middle frame of an electronic device (e.g., a mobile phone), for example, the second opening 140 may include a volume key opening, a data line opening, an earphone line opening, and the like. Specifically, the first hole 130 penetrates through the main body 10 of the first protective shell 110 and a portion of the second protective shell 120 covering the main body 10, and for example, after the second protective shell 120 and the first protective shell 110 are sequentially formed by injection molding, the first hole 130 may be formed by punching through corresponding profiling tools. Specifically, as described above, the second protective shell 120 may cover the main body 10 and at most a part of the side wall portion 20, for example, the second protective shell 120 may cover the main body 10 and the side wall portion 20 without the second opening 140, so that the second opening 140 only penetrates through the first protective shell 110, thereby providing a better touch feeling for the user, and improving the user experience, and the protective shell 100 has a better wear resistance at the second opening 140, so that the user does not scratch the periphery of the second opening 140 due to frequent contact during operations such as pressing a key and charging, and further improving the appearance and usability of the protective shell 100.

In summary, the protective shell 100 according to the present application example has high strength and hardness, can protect electronic devices well, is not prone to scratching, has good hand feeling of holding and pressing keys, and has good appearance consistency, good appearance effect and good comprehensive performance.

In another aspect of the present application, a method of making a protective case is presented. According to some examples of the present application, the protective shell manufactured by the method may be the protective shell described above, and thus, the protective shell manufactured by the method has all the features and advantages of the protective shell described above, and will not be described herein again. Specifically, the protective shell comprises a main body part and a side wall part arranged around the main body part, the protective shell with both strength and use hand feeling can be simply and conveniently obtained by the method, and the protective shell is not easy to scratch, good in appearance consistency and good in use performance.

According to some examples of the present application, referring to fig. 4, the method includes:

s100: forming a second protective shell by a second injection molding process

In this step, a second protective case is formed by a second injection molding process. Specifically, the shape of the second protective case may be the same as that described above. According to some examples of the present application, a second material may be subjected to a second injection molding process using a second mold to form a second protective shell. Specifically, the second material may be the same as previously described, for example, the second material may include polycarbonate, polymethyl methacrylate, or the like. Specifically, the injection temperature of the second injection molding treatment may be 270-310 ℃, for example, 270 ℃, 280 ℃, 290 ℃, 300 ℃ and the like, and a person skilled in the art may select the injection temperature according to the specific type of the second material; specifically, the temperature of the second mold may be 80 to 100 ℃, for example, 85 ℃, 90 ℃, 95 ℃ or the like. Therefore, when the injection temperature of the second injection molding treatment and the temperature of the second mold are in the above ranges, the injection molding of the second material is facilitated, and the second protective shell with better strength and hardness can be formed. Specifically, the injection pressure, injection speed, pressure holding time, and the like of the second injection process may be adjusted according to the shape of the second protective case to be manufactured, the mold gate method, and the like.

Specifically, the surface of the second mold may have a fourth texture, for example, the fourth texture may be formed on the surface of the second mold in advance by etching or the like, and therefore, the surface of the second protective case formed by the second injection molding process in this step has a second texture corresponding to the fourth texture, and thus, the second texture may be simply formed on the surface of the second protective case formed by injection molding, and the appearance effect of the second protective case is enriched.

According to some examples of the present application, referring to fig. 6, prior to forming the second protective shell by the second injection molding process, the method may further comprise:

s110: drying the second material

In this step, the injection-molded particles for injection-molding the second protective case, i.e., the second material, are subjected to a drying process in order to remove moisture absorbed by the second material during transportation and storage, further improving the properties of the second protective case prepared. Specifically, the second material (e.g., polycarbonate injection molded pellets) may be baked at 95-100 ℃ for 3-5 hours.

According to some examples of the present application, referring to fig. 6, after forming the second protective shell by the second injection molding process, the method may further include:

s120: shaping the second protective shell

In this step, the second protective case formed by the second injection molding process in the previous step is subjected to a shaping process. It should be noted that, after the second protective shell is formed by injection molding in the previous step, the thickness of the second protective shell may be 0.6-0.9 mm. Namely, the thickness of the second protective shell is thin, so that the second protective shell is easy to bend and deform, namely, the second protective shell is arched outwards, therefore, in this step, the second protective shell needs to be shaped, namely, 2-3kg of pressure is applied to the second protective shell by using a jig, the part of the second protective shell corresponding to the main body part of the first protective shell prepared subsequently is flattened, and the time for applying the pressure can be 3-5min, so that the appearance effect and the service performance of the second protective shell are further improved.

S130: performing a cutting process

In the step, the shaped second protective shell is cut, and an injection molding sprue of the second material and burrs in the second protective shell are removed. According to some examples of the present application, in order to avoid that the injection gate of the second protective shell and the burr in the second protective shell affect the bonding tightness between the first protective shell and the second protective shell when the first protective shell is injection molded on the outer side of the second protective shell in the subsequent step, the injection gate of the second material and the burr in the second protective shell may be removed in advance, for example, the injection gate of the second material may be cut (the injection gate usually protrudes outward), and the burr may be cut (i.e., the portion of the second protective shell where the thickness of the edge is thicker than the middle portion).

S200: forming a first protective case by a first injection molding process

In this step, a first protective shell is formed on one side of the second protective shell manufactured in the previous step through a first injection molding process so as to form the protective shell, specifically, the first protective shell has a main body portion and a side wall portion extending from an edge of the main body portion, the main body portion has a first face and a second face which are oppositely arranged, the side wall portion extends in a direction in which the second face is away from the first face, and an orthographic projection of the second protective shell manufactured in the previous step on the first protective shell is located on the main body portion and at most a part of the side wall portion, wherein a material forming the second protective shell and a material forming the first protective shell are not completely the same. According to some examples of the present application, a first material may be subjected to a first injection molding process using a first mold to form a first protective case. Specifically, the first material may be the same as previously described, for example, the first material may comprise a thermoplastic elastomer, such as a thermoplastic polyurethane elastomer, a thermoplastic rubber, a polypropylene-modified polycarbonate, or the like; the shore hardness of the first material may be 85-95A, for example, may be 90A. Therefore, the first protective shell formed by the material can better avoid scraping of the protective shell, the hand feeling of holding and pressing keys of a user can be improved, and the service performance of the prepared protective shell is further improved.

Specifically, the injection temperature of the first injection molding process may be 210-230 ℃, for example, 215 ℃, 220 ℃, 225 ℃ or the like, and those skilled in the art may select the injection temperature according to the specific type of the first material; specifically, the temperature of the second mold may be 30 to 50 ℃, for example, 35 ℃, 40 ℃, 55 ℃ or the like. Therefore, when the injection temperature of the first injection molding treatment and the temperature of the first mold are in the above ranges, the injection molding of the first material is facilitated, and the first protective shell with better flexibility can be formed. Specifically, the injection pressure, injection speed, holding time, and the like of the first injection molding process may be adjusted according to the shape of the first protective case to be manufactured, the mold gate method, and the like.

Specifically, the thickness of the first protective case formed in this step may be 0.5 to 0.7 mm. Therefore, when the thickness of the first protective shell is within the range, the protective shell can be well prevented from being scratched, the holding hand feeling of a user can be improved, the light and thin design of the protective shell is facilitated, and the appearance effect of the manufactured protective shell is further improved.

Specifically, the surface of the first mold may have a third texture, for example, the third texture may be formed on the surface of the first mold in advance by etching or the like, and therefore, the surface of the first protective case formed by the first injection molding process in this step has a first texture corresponding to the third texture, and thus, the first texture may be simply formed on the surface of the first protective case formed by injection molding, and the appearance effect of the first protective case is enriched. Moreover, the first texture and the second texture in the second protective shell can be different, so that abundant texture effects can be formed by overlapping the first texture and the second texture, and the appearance effect of the prepared protective shell is further improved.

According to some examples of the present application, referring to fig. 6, before forming the first protective case by the first injection molding process, the method may further include:

s210: drying the first material

In this step, the injection-molded particles for injection-molding the first protective shell, i.e., the first material, are subjected to a drying process in order to remove moisture absorbed by the first material during transportation and storage, further improving the properties of the first protective shell produced. Specifically, the first material (e.g., thermoplastic elastomer injection molded particles) may be baked at 85-95 ℃ for 3-5 hours.

According to some examples of the present application, referring to fig. 5, after forming the first protective shell, the method further comprises:

s300: performing a first punching process to form a first opening

In this step, the protective cases (i.e., the stacked second protective case and first protective case) formed in the previous step are subjected to a first punching process to form first openings that penetrate the body portion of the first protective case and the second protective case covering the body portion. Specifically, the type of the first opening and the like may be the same as those described above, and will not be described herein, for example, a corresponding profiling tool may be used to punch a hole to form the first opening, and the first opening may include a camera opening, a flash lamp opening, and the like.

S400: performing a second punching process to form a second opening

In this step, the protective case formed in the previous step is subjected to a second punching process to form a second opening hole, which is located in the side wall portion of the first protective case and which penetrates the first protective case. Specifically, the type of the second opening and the like may be the same as those described above, and will not be described herein again, for example, a corresponding profiling jig may be used to punch a hole to form the second opening, and the second opening may include a volume key opening, a data line opening, an earphone line opening and the like. Specifically, as mentioned before, the main part that the second protective housing can cover first protective housing and the lateral wall portion that does not set up the second trompil, consequently, the second trompil only runs through first protective housing, and from this, user's button is felt better, has promoted user experience, and, this protective housing is better at the wearability of second trompil department, and the user is in the button, in the operation process such as charging, can not be scraped flower etc. because of frequent contact around this second trompil, the appearance effect and the performance of this protective housing have further been improved.

In yet another aspect of the present application, a protective case is presented. The protective shell is formed by the method described above. Therefore, the protective shell has all the characteristics and advantages of the protective shell manufactured by the method, and the description is omitted. Generally speaking, this protective housing can compromise intensity and use and feel to the difficult scratch of table second, the appearance uniformity is better, performance preferred.

In yet another aspect of the present application, an electronic device is presented. According to some examples of the present application, the electronic device includes: the protective shell comprises a shell body, a mainboard, a memory, a screen and the protective shell or the protective shell manufactured by the method, wherein the shell body limits an accommodating space, the mainboard and the memory are positioned in the accommodating space, the screen is arranged in the accommodating space and is connected with the mainboard, the protective shell is sleeved on the shell body, and the second protective shell is in contact with the shell body. Therefore, the electronic device has all the features and advantages of the protective shell or the protective shell manufactured by the method, and the description is omitted here. Generally speaking, the protective shell can better protect the electronic equipment, can also improve the holding hand feeling of the electronic equipment, and has good appearance effect and better use performance.

The present invention is described below with reference to specific examples, which are intended to illustrate the present invention and should not be construed as limiting the scope of the present invention. The examples do not specify particular techniques or conditions, according to techniques or conditions described in the literature within the art or according to the product specifications.

Example 1

(1) And manufacturing a second protective shell. Drying the polycarbonate plastic particles in advance, namely baking the polycarbonate plastic particles at 95-100 ℃ for 4 h; and injecting the baked polycarbonate plastic particles into a second mold for second injection molding, wherein the injection molding temperature is 300 ℃, and the temperature of the second mold is 95 ℃ to form a second protective shell.

(2) Shaping the second protective shell manufactured in the previous step, applying 2kg of pressure to the center of the second protective shell by using a jig for 3-5 minutes, and flattening the second protective shell; and cutting the second protective shell subjected to the shaping treatment, and cutting off a sprue during second injection molding treatment and a flash at the edge of the second protective shell.

(3) And manufacturing a first protective shell. Drying thermoplastic polyurethane elastomer (TPU) plastic particles in advance, namely baking the thermoplastic polyurethane elastomer (TPU) plastic particles at 90 ℃ for 4 hours; and putting the second protective shell formed in the previous step into a first mould, injecting the baked thermoplastic polyurethane elastomer (TPU) plastic particles into the first mould for first injection molding treatment, wherein the injection molding temperature is 220 ℃, the temperature of the first mould is 50 ℃, and the first protective shell is formed on the outer side of the second protective shell.

(4) And punching the protective shell formed in the previous step by using a profiling jig so as to form a first hole and a second hole, wherein the first protective shell comprises a main body part and a side wall part extending from the main body part, and the second protective shell covers the main body part of the first protective shell and the side wall part without the second hole.

Comparative example 1

The pure PC protective shell, namely the main body surface and the side wall of the protective shell are both formed by polycarbonate.

Comparative example 2

The pure TPU protective shell, namely the main body surface and the side wall of the protective shell are both formed by thermoplastic polyurethane elastomer.

Comparative example 3

The main body surface of the protective shell is only of a single-layer structure formed by polycarbonate, and the periphery of the main body surface is a side wall formed by a single-layer thermoplastic polyurethane elastomer.

Performance testing

(1) The protective cases formed in example 1 and comparative example 3 were subjected to a reliability test: boiling the protective shell with water at 80 ℃ for 30 minutes, and after the shell in the comparative example 1 is boiled with water, degumming and cracking occur; after the shell in example 1 was boiled in water, no degumming occurred. The above results indicate that in the protective shell of the present application, the first protective shell formed by the TPU material is stacked on the outer surface of the second protective shell formed by the PC material, so that the second protective shell and the first protective shell formed by different materials have good bonding force and good appearance consistency; in contrast, in the protective case of comparative example 3, the joint between PC and TPU had poor bonding strength and was easily degummed and broken.

(2) The protective shells formed in example 1 and comparative examples 1 and 3 were subjected to an abrasion resistance test: the outer surface of the protective shell (i.e., the main body surface of the protective shell facing the outside during use) was rubbed with steel wool, the steel wool area was 2cm × 2cm, the load was 1kg, the protective shell in comparative example 1 was rubbed 30 to 50 times and then scratched, the protective shell in comparative example 3 was rubbed 30 to 50 times and then scratched, and the protective shell in example 1 was rubbed 1000 times and still had no scratch. The above results show that, in the protective shell of the present application, the outer surface of the second protective shell formed by the PC material is provided with the first protective shell formed by the TPU material, and the wear resistance is good.

(3) The protective shells formed in example 1 and comparative example 2 were subjected to a drop resistance test: the protective cases formed in the example 1 and the comparative example 2 are sleeved on the corresponding mobile phones, the mobile phones sleeved with the protective cases are dropped from a high position, and repeated tests are carried out for many times, so that the mobile phones cannot fall out of the protective cases after the mobile phones sleeved with the protective cases in the example 1 are dropped, and the drop-resistant protective performance of the protective cases is good; after the mobile phone provided with the protective shell in the comparative example 1 falls down, the mobile phone can fall out of the protective shell, and the fact that the pure TPU protective shell in the comparative example 2 is poor in strength and hardness and protective performance is proved, the mobile phone can easily slide out of the protective shell when falling, and the falling protection effect cannot be achieved.

In addition, the pure PC protective shell in the comparative example 1 has high hardness, poor hand feeling of holding and pressing keys and influence the experience of users.

In summary, the protective cases in comparative examples 1 to 3 all have the problem that hardness strength, hand-holding feeling, wear resistance, appearance consistency and the like cannot be considered at the same time, and the usability of the plastic protective case is affected, while the protective case in example 1 has high strength and hardness, can better protect electronic equipment, is not easy to scratch, has good hand-holding feeling, and has good appearance consistency and appearance effect.

The embodiments of the present application have been described in detail above, but the present application is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present application within the technical idea of the present application, and these simple modifications all belong to the protection scope of the present application. It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention.

In the description herein, references to the description of the terms "example," "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the example or example is included in at least one example or example of the application. In this specification, a schematic representation of the above terms does not necessarily refer to the same example or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more examples or examples. Furthermore, those of skill in the art may combine and combine features of different examples or illustrations and features of different examples or illustrations described in this specification without undue conflict.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Although examples of the present application have been shown and described above, it is understood that the above examples are illustrative and not to be construed as limiting the present application, and that variations, modifications, substitutions and alterations in the above examples may be made by those of ordinary skill in the art within the scope of the present application.

Claims

1. A protective case, comprising:

the protective case comprises a first protective case and a second protective case, wherein the first protective case is provided with a main body part and a side wall part extending from the edge of the main body part, the main body part is provided with a first surface and a second surface which are arranged oppositely, and the side wall part extends towards the direction of the second surface far away from the first surface; and

a second protective case provided on a side of the second face remote from the first face, the second protective case covering the main body portion and at most a part of the side wall portion of the first protective case, wherein,

the material forming the first protective shell and the material forming the second protective shell are not identical.

2. A protective case according to claim 1, wherein the first protective case is formed of a first material and the second protective case is formed of a second material having a hardness greater than that of the first material.

3. The protective case of claim 2, wherein the first material has a shore hardness of 85-95A.

4. The protective case of claim 2, wherein the first material comprises a thermoplastic elastomer; the second material comprises at least one of polycarbonate and polymethyl methacrylate;

optionally, the first material comprises at least one of a thermoplastic polyurethane elastomer, a thermoplastic rubber, a polypropylene modified polycarbonate.

5. A protective casing according to claim 1 wherein the first protective casing is 0.5 to 0.7mm thick and the second protective casing is 0.6 to 0.9mm thick.

6. A protective case according to claim 1, wherein the first protective case has a first texture therein and the second protective case has a second texture therein, the first texture and the second texture not being identical.

7. The protective case of claim 1, wherein the protective case has a first opening in the body portion of the first protective case and extending through the body portion and the second protective case covering the body portion, and a second opening in the sidewall portion of the first protective case and extending through the first protective case.

8. The protective case of claim 7, wherein the second protective case covers the body portion and the side wall portion where the second opening is not provided.

9. A method of making a protective case, comprising:

forming a second protective shell through second injection molding treatment;

forming a first protective case on one side of the second protective case through a first injection molding process to form the protective case, wherein,

the first protective shell has a main body portion and a side wall portion extending from an edge of the main body portion, the main body portion has a first surface and a second surface which are arranged oppositely, the side wall portion extends toward a direction in which the second surface is away from the first surface, the second protective shell covers the main body portion and at most a part of the side wall portion,

10. The method of claim 9, wherein forming a second protective shell by a second injection molding process further comprises:

and performing the second injection molding treatment on the second material by using a second mold, wherein the injection molding temperature of the second injection molding treatment is 270-310 ℃, and the temperature of the second mold is 80-100 ℃.

11. The method of claim 10, wherein the second material comprises at least one of polycarbonate, polymethylmethacrylate;

optionally, the second protective shell is formed to have a thickness of 0.6 to 0.9 mm.

12. The method of claim 10, wherein the forming a first protective shell by a first injection molding process further comprises:

and carrying out the first injection molding treatment on the first material by using a first mold, wherein the injection molding temperature of the first injection molding treatment is 210-230 ℃, and the temperature of the first mold is 30-50 ℃.

13. The method of claim 12, wherein the first material comprises a thermoplastic elastomer;

optionally, the first material comprises at least one of a thermoplastic polyurethane elastomer, a thermoplastic rubber, a polypropylene modified polycarbonate;

optionally, the first protective shell is formed to have a thickness of 0.5 to 0.7 mm;

optionally, the shore hardness of the first material is 85-95A.

14. The method of claim 12, wherein the surface of the first mold has a third texture, the surface of the first protective case formed by the first injection molding process has a second texture corresponding to the third texture, the surface of the second mold has a fourth texture, the surface of the second protective case formed by the second injection molding process has a second texture corresponding to the fourth texture, wherein,

the first texture and the second texture are not identical.

15. The method of claim 9, wherein after forming the first protective shell, the method further comprises:

performing a first punching process on the protective case so as to form a first opening that penetrates the body portion of the first protective case and a portion of the second protective case that covers the body portion;

performing a second punching process on the side wall portion of the protective case so as to form a second opening that penetrates the first protective case.

16. The method of claim 12, wherein prior to performing the second injection molding process, and prior to performing the first injection molding process, the method further comprises:

drying the second material and the first material;

optionally, the drying process comprises: baking the second material at 95-100 ℃ for 3-5 h; baking the first material at 85-95 ℃ for 3-5 h.

17. The method of claim 9, wherein after the second injection molding process and before the first injection molding process, the method further comprises:

performing a shaping process on the second protective case formed by a second injection molding process, the shaping process including: applying 2-3kg of pressure to the second protective shell, flattening the corresponding parts of the second protective shell and the main body part, and applying the pressure for 3-5 min;

and cutting the shaped second protective shell, and removing the injection molding sprue of the second material and the flash in the second protective shell.

18. A protective casing, wherein the protective casing is made by the method of any one of claims 9 to 17.

19. An electronic device, comprising:

a housing defining an accommodating space;

the main board and the memory are positioned in the accommodating space; and

the screen is arranged in the accommodating space and is connected with the main board;

the protective case of any one of claims 1-8 or the protective case made by the method of any one of claims 9-17, wherein the protective case is fitted over the case and the second protective case is in contact with the case.