WO2017039872A1

WO2017039872A1 - Sim card connector and manufacturing method thereof

Info

Publication number: WO2017039872A1
Application number: PCT/US2016/043804
Authority: WO
Inventors: Chong CHEN; Bocheng HOU
Original assignee: Microsoft Technology Licensing, Llc
Priority date: 2015-08-28
Filing date: 2016-07-25
Publication date: 2017-03-09
Also published as: CN106486802B; CN106486802A

Abstract

A card connector (100) and a method of manufacturing the card connector are provided. The card connector (100) includes a base (120) including a grounding contact (130); and a shielding tray (110) for holding a card, the shielding tray (110) being operable to form a detachable connection with the base (120), wherein the shielding tray (110) comprises a fixing portion (111) operable to fix the SIM card (200) in position within the shielding tray (110) and mate with the grounding contact (130). The card connector (100) provides a fixing mechanism (111) to both fix the SIM card (200) within the shielding tray (110) and fix the shielding tray (110) to the base (120), with an exposed area of the card minimized so as to improve the shielding performance. The entire shielding tray (110) is automatically grounded upon being fixed to the base (120). A mobile device (1200) utilizing the SIM card connector (100) is also provided.

Description

SI M CARD CONNECTOR AND MANUFACTURING METHOD THEREOF

BACKGROUND

[0001] A card connector may be used in an electronic device to receive a storage card or a subscriber identity module (SIM) card so as to read the information recorded thereon. For example, a typical mobile device may include at least one card connector allowing a user to insert a SIM card into the mobile device or extracting the SIM card out of the mobile device.

SUMMARY

[0002] Example embodiments of the subject matter described herein proposes a card connector, a mobile device, and a method of manufacturing the card connector.

[0003] In one aspect, example embodiments of the subject matter described herein provide a card connector. The card connector includes a base including a grounding contact; and a shielding tray for holding a card, the shielding tray being operable to form a detachable connection with the base, wherein the shielding tray comprises a fixing portion operable to fix the card in position within the shielding tray and mate with the grounding contact.

[0004] In another aspect, example embodiments of the subject matter described herein provide a mobile device. The mobile device includes a main body; a card connector including: a base fixed to the main body; a grounding contact positioned on the base; and a shielding tray for holding a SIM card, the shielding tray being operable to form a detachable connection with the base, wherein the shielding tray comprises a fixing portion operable to fix the SIM card in position within the shielding tray and mate with the grounding contact; and a battery to be installed to the main body, abutting against the shielding tray in case that the shielding tray is installed to the base.

[0005] In another aspect, example embodiments of the subject matter described herein provide a method of manufacturing a card connector. The method includes providing a base including a grounding contact; and providing a shielding tray for holding a card, the shielding tray being operable to form a detachable connection with the base, wherein the shielding tray comprises a fixing portion operable to fix the card in position within the shielding tray and mate with the grounding contact.

[0006] Through the following description, it would be appreciated that the card connector in accordance with the embodiments of the subject matter described herein provides a fixing mechanism to both fix the card within the shielding tray and fix the shielding tray to the base, with an exposed area of the card minimized during data/power transmissions so as to improve the shielding performance in terms of anti-interference. The entire shielding tray is automatically grounded upon being fixed to the base. In addition, the card connector according to the embodiments of the subject matter described herein allows the shielding tray to be installed to the base in various directions, which enables different configurations of the card connector to be formed within a device.

BRIEF DESCRIPTION OF THE DRAWINGS

[0007] FIG. 1 illustrate a block diagram of a card connector according to one embodiment of the subject matter described herein;

[0008] FIG. 2 illustrates a perspective view of the card connector according to one embodiment of the subject matter described herein;

[0009] FIG. 3 illustrates a perspective view of a shielding tray with a card being installed to the shielding tray according to one embodiment of the subject matter described herein;

[0010] FIG. 4 illustrates a top view of the shielding tray with the card fixed within the shielding tray according to one embodiment of the subject matter described herein;

[0011] FIG. 5 illustrates a perspective view of the shielding tray according to one embodiment of the subject matter described herein;

[0012] FIG. 6 illustrates a perspective view of the base according to one embodiment of the subject matter described herein;

[0013] FIG. 7 illustrates a sectional view of the card connector with the card fixed within the shielding tray according to one embodiment of the subject matter described herein;

[0014] FIG. 8 illustrates a perspective view of the card connector with the shielding tray being installed to the base disposed on a substrate of an electronic device according to one embodiment of the subject matter described herein, in which arrows show possible directions for installing the shielding tray to the base;

[0015] FIG. 9 illustrates a sectional view of the card connector sandwiched between a battery and the substrate of the electronic device according to one embodiment of the subject matter described herein;

[0016] FIG. 10 illustrates a perspective view of a shielding tray according to another embodiment of the subject matter described herein; [0017] FIG. 11 illustrates a sectional view of the card connector of FIG. 10 sandwiched between two of the substrates of the electronic device;

[0018] FIG. 12 illustrates a block diagram of a mobile device according to one embodiment of the subject matter described herein; and

[0019] FIG. 13 illustrates a flowchart of a method of manufacturing the card connector in accordance with embodiments of the subject matter described herein.

DETAILED DESCRIPTION

[0020] The subject matter described herein will now be discussed with reference to several example embodiments. These embodiments are discussed only for the purpose of enabling those skilled persons in the art to better understand and thus implement the subject matter described herein, rather than suggesting any limitations on the scope of the subject matter.

[0021] The term "includes" and its variants are to be read as open terms that mean "includes, but is not limited to." The term "or" is to be read as "and/or" unless the context clearly indicates otherwise. The term "based on" is to be read as "based at least in part on." The term "one embodiment" and "an embodiment" are to be read as "at least one embodiment." The term "another embodiment" is to be read as "at least one other embodiment." Unless specified or limited otherwise, the terms "mounted," "connected," "supported," and "coupled" and variations thereof are used broadly and encompass direct and indirect mountings, connections, supports, and couplings. Further, "connected" and "coupled" are not restricted to physical or mechanical connections or couplings. In the description below, like reference numerals and labels are used to describe the same, similar or corresponding parts in the several views of FIGS. 1-13. Other definitions, explicit and implicit, may be included below.

[0022] A card connector may be implemented as a component within an electronic device. For example, card connectors are widely used in mobile phones in order to receive and hold SIM cards so that information stored on the SIM card can be read by the mobile phones. In some instances, the card connector requires end users to put out a tray for holding the SIM card, and position the card in such a tray, and finally install the tray into the phone in order to install or switch a SFM card. However, such a mechanism usually requires a relatively complicated structure within the phone to allow the ejection of the tray together with the SIM card. For example, a particular phone requires the end user to use a needle so as to eject the tray to a certain extent with regard to the housing of the phone, allowing the tray to be accessible.

[0023] Due to the smaller and smaller size of cards such as SIM cards, Micro-SIM cards and Nano-SIM cards, the operational space for the card (as well as its tray) is reduced significantly and thus it becomes more and more difficult for the users to extract the tray out of the device. Some solutions use trays exposing a considerable portion of the surface area of the card in order to facilitate the card installation and extraction. Meanwhile, this may pose a problem because the reduced area of shielding also negatively affects the performance in terms of anti-interference.

[0024] FIG. 1 illustrates a block diagram of a card connector 100 according to one embodiment of the subject matter described herein. The card connector 100 is described only for the purpose of illustration without suggesting any limitations as to the scope of the subject matter described herein. Different embodiments with different structures can realize the purpose and concept of the subject matter described herein.

[0025] As shown, the card connector 100 includes a base 120 and a shielding tray 110 that can be detachably connected to the base 120. The shielding tray 110 has a fixing portion 111 operable to fix a card 200 in a fixing position within the shielding tray 110. Namely, the shielding tray 110 is adapted to let an end user install the card 200 on the shielding tray 110. A grounding contact 130 is provided on the base 120 for mating with the fixing portion 111 arranged on the shielding tray 110 in order to fix the shielding tray 110 tightly.

[0026] The card connector 100 further includes a number of terminals 140 in order to form an electrical connection to an electronic device 300. Such an electrical connection may be used for data and power transmissions. The electrical connection may be made only when the card 200 is received in the shielding tray 110 and the shielding tray 110 is inserted in the fixing position onto the base 120.

[0027] In this configuration, when an end user would like to install the card 200 to the card connector 100, he/she can form a detachable connection between the card 200 and the shielding tray 110 fixed by the fixing portion 111, and then insert the shielding tray 110 to the base 120. The fixing portion 111 and the terminals 140 arranged on the base 120 form both an electrical and a mechanical connection with each other. On the other hand, when an end user would like to take out the card 200 from the card connector 100, he/she can firstly remove the shielding tray 110 from the base 120, and then remove the card 200 from the shielding tray 110. [0028] As a result, the shielding tray 110 can be manually removed from the base 120 by the end user. Due to the detachability of the shielding tray 110, this configuration allows the user to easily remove the card from the shielding tray 110 or install the card 200 to the shielding tray 110. When the shielding tray 110 is installed onto the base 120, the fixing portion 111 is electrically and mechanically connected to the shielding tray 110 and provides a grounding level to the shielding tray 110. Meanwhile, most of the surface area of the card 200 can be covered by the shielding tray 110 that is able to be grounded by the grounding contact 130 located on the base 120, resulting in an improved anti-interference during data/power transmission. Additionally, the fixing portion 111 interacts with both the card 200 and the grounding contact 130 to form the detachable connection.

[0029] With reference to FIG. 2, a perspective view of a card connector 100 according to one embodiment of the subject matter described herein is shown. In this embodiment, the shielding tray 110 may be removably coupled with the base 120. In this view, the shielding tray 110 is in the fixing position. A positioning feature 121 can be provided on the base in order to help the end user install the shielding tray 110 that is correctly orientated to the base 120.

[0030] In one embodiment, a grasping member 115 is arranged at one end of the shielding tray 110, which allows the end user to grasp the shielding tray 110 in an ergonomic manner by providing a slot 117 on the surface of the grasping member 115. The slot 117 can be sized to match the size of a nail.

[0031] In some embodiments, the shielding tray 110 may be made of electrically conductive materials such as stainless steel and copper. Alternatively, the shielding tray 110 may be made of any suitable material plated with electrically conductive materials. The base 120 may be made of insulating materials. The grasping member 115 may be made of insulating materials or conductive materials.

[0032] Now FIGs. 3-5 will be described together to explain the principle of operation of the shielding tray 110. FIG. 3 shows the shielding tray 110 with the card 200 being installed to the shielding tray 110. FIG. 4 shows a top view of the shielding tray 110 with the card installed. FIG. 5 shows a perspective view of the shielding tray 110 without any card or the grasping member 115.

[0033] A number of card contacts 210 are usually provided on a surface of the card 200 in order to carry out data/power transmission to the electronic device 300 via the terminals 140 in case that the card 200 is installed to the shielding tray 110 and the shielding tray 110 is inserted to the base 120. The position, number and arrangement of these card contacts 210 are not to be limited.

[0034] A flat portion 112 may be arranged on the shielding tray 110 so that the card 200 can be laid against the flat portion 112 upon having been installed to the shielding tray 110. A surrounding portion 113 may be arranged on the shielding tray 110 and the fixing portion 111 may be provided on the surrounding portion 113. In the example embodiments shown in these figures, there are two surrounding portions 113 arranged on opposite sides of the flat portion 112. In some embodiments, the surrounding portions 113 can be implemented as a wall perpendicular to the flat portion 112. The height of the surrounding portions 113 may be set in such a way that the top edge of the surrounding portions 113 is aligned to the card 200 when being fixed on the flat portion 112.

[0035] In some embodiment, each of the surrounding portions 113 includes fixing portions 111 thereon, as shown in FIGs. 4 and 5. It is to be understood that the number, shape, location and arrangement of the fixing portions 111 are not to be limited to those shown in the figures. In one embodiment, it is also possible to arrange only one fixing portion on one of the surrounding portions 113, for example.

[0036] The connection between the card 200 and the shielding tray 110 can be reinforced in a variety of ways. In one embodiment, as shown in FIG. 5, one or more protrusions 118 can be arranged on the fixing portion 111 on a side of the surrounding portion 113. The protrusion(s) 118 faces the flat portion 112 and the card 200 when it is installed to the shielding tray 110. Such a protrusion 118 is helpful to form an interference fit with the card 200 so as to tightly fix the card 200 within the shielding tray 110.

[0037] Alternatively or additionally, a spring 116 can be arranged on the shielding tray 110 at one edge of the flat portion 112, and a stopper 114 can be arranged on the shielding tray 110 at an opposite edge of the flat portion 112 to where the spring 116 is located. In the figures, two springs 116 and three stoppers 114 are shown. However, the number, shape, location and arrangement of the spring 116 or stopper 114 are not to be limited to those in the shown examples. When the card 200 is laid on the flat portion 112, the spring 116 is distorted and provides a reactive force to push the card 200 against the stopper 114. By providing the fixing portions 111 and additionally the spring 116 and stopper 114, the card 200 can be tightly fixed with regard to the shielding tray 110.

[0038] In one embodiment, a recess 119 may be arranged on the fixing portion 111, facing outwards, on an opposite side of the surrounding portion 113. The protrusion 118 together with the recess 119 constructs the entire fixing portion 111 from both sides of the surrounding portion 113.

[0039] As shown in FIG. 4, the flat portion 112 may cover a predefined percentage of a surface area of the card 200 (one side) in case that the card is fixed in the shielding tray 110. For example, in one embodiment, the surface area of the card 200 may be fully covered so as to maximize the shielding performance.

[0040] In one embodiment, the shielding tray 110, including the flat portion 112, the surrounding portions 113, the fixing portions 111, the springs 116 and the stoppers 114, can be made from a single piece of metal. The protrusions 118 and the recesses 119 can be punched on the surrounding portions 113. In this way, the protrusions 118 and the recesses 119 can be formed together. For example, the shielding tray 110 can be machined from a piece of copper. Additionally, the shielding tray 110 may be constructed from different pieces. For example, the springs 116 can be coil springs fixed to the shielding tray 110, and the fixing portions 111 can be made by depositing additional materials onto the surrounding portions 113 for the protrusions 118 while drilling holes on the surrounding portions 113 for the recesses 119.

[0041] With reference to FIG. 6, the base 120 installed with various contacts is shown. A number of terminals 140 are paired with the respective transmission contacts 141. The terminals 140 and the contacts 141 can be made of a same material or different materials and electrically connected with each other. The terminals 140 are directed to circuits on a substrate of the electronic device 300, and the transmission contacts 141 are used to couple with the corresponding card contacts 210 in case that the card 200 is installed to the shielding tray 110 and the shielding tray 110 is in turn installed to the base 120. The transmission contacts 141 can be made of a conductive material such as copper. Alternatively, it can be made of any suitable material plated with a conductive metal layer such as a gold layer, so as to improve the conductivity. In one embodiment, each of the transmission contacts 141 and its corresponding terminal 140 can be made from a single piece of material, for example.

[0042] The grounding contacts 130 are arranged on the base 120 for interacting with the corresponding fixing portions 111 on the surrounding portions 113 of the shielding tray 110. The number of the grounding contacts 130 may be identical to the number of the fixing portions 111, and the shape of the grounding contacts 130 may correspond to the shape of the protrusions 118 so as to facilitate the detachable connection. In one embodiment, the base 120 may include two grounding terminals 131, each being electrically connected to the grounding contacts 130 located at one edge of the base 120. The two grounding terminals 131 may be electrically connected in case that the shielding tray 110 is installed onto the base 120. At this point, the grounding contacts 130 at one edge of the base 120 are coupled to the recesses 119 at the corresponding edge of the shielding tray 110. The recesses 119 at the opposite edge of the shielding tray 110 are in turn coupled to the grounding contacts 130 at the opposite edge of the base 120. If the shielding tray 110 is fixed by the base 120, a first one of the terminals 131, the grounding contacts 130 connected to the first grounding terminal 131 and the fixing portions 111 connected to such grounding contacts 130 may form a route to the flat portion 112. Then, the fixing portion 111 on the opposite side, the grounding contacts 130 on the opposite side, and a second one of the grounding terminals 131 may complete the route. As a result, the shielding tray 110 can be grounded by forming a loop with the electronic device 300 via the two grounding terminals 131, and therefore the shielding capability is provided.

[0043] Additionally, a detecting contact 150 may be arranged on the base 120. The detecting contact 150 is adapted to be deformed and connected with a conductor beneath in case that the card 200 is pressed against it. The conductor is in turn connected to a detecting terminal 151, so that a signal may be returned upon connecting the detecting contact 150 to the detecting terminal 151, indicating that the card 200 fixed in the shielding tray 110 is installed to the base 120.

[0044] The grounding contacts 130, the detecting contact 150 and the detecting terminal 151 can be made of a conductive material such as copper. Alternatively, they can be made of any suitable material plated with a conductive metal layer such as a gold layer, so as to improve the conductivity. In one embodiment, the grounding contacts 130 at one side of the base 120 and their corresponding grounding terminal 131 can be made from a single piece of material, or can be made from different materials but electrically connected with each other.

[0045] FIG. 7 shows a sectional view of the card connector 100 with the card 200 fixed within the shielding tray 110 and the shielding tray 110 fixed within the base 120. The recess 119 of the fixing portion 111 is operable to mate with the grounding contact 130 in order to ground the shielding tray 110, as discussed above, and to detachably fix the shielding tray 110 to the base 120. In this view, it is shown that the top of the card 200 is covered by the flat portion 112 of the shielding tray 110 and the lateral sides of the card 200 is covered by the surrounding portions 113 of the shielding tray 110. In addition, the shielding tray 110, after being installed onto the base 120, can be flush with the perimeter of the base 120 at the top.

[0046] In one embodiment, the grounding contact 130 may be shaped in a curved surface to facilitate installing the shielding tray 110 to the base 120. In another embodiment, the grounding contact 130 may be spherically shaped or as a portion of a ball. Advantages of this configuration can be shown by FIG. 8, as the shielding tray 110 is allowed to be installed from both a first direction (indicated by arrow Di) perpendicular to a surface of the base 120 and a second direction (indicated by arrow D₂) parallel to the surface of the base 120. The shape of the grounding contact 130 also allows the end user to install the shielding tray 110 from various directions other than Di and D₂ (for instance, in an angle between Di and D₂). Such configurations of the grounding contact 130 allow a flexible installation of the shielding tray 110 in different angles. Meanwhile, the grounding contact 130 is also used to ground the shielding tray 110, thereby protecting the card 200 from electromagnetic interference.

[0047] FIG. 9 illustrates a sectional view of the card connector 100 sandwiched between a battery 320 and the substrate 310 of the electronic device 300. The battery 320 is used to power up the electronic device 300, and can be connected to the electronic device 300 after the shielding tray 110 carrying the card 200 is installed onto the base 120 of the card connector 100. For example, the shielding tray 110 can be installed onto the base 120 in the directions shown by FIG. 8. The battery 320 abuts against the card connector 100 at the top. As explained previously, the top surface of the shielding tray 110 can be arranged to be flush with the perimeter of the base 120. As a result, the battery 320 can be laid flat and positioned steadily with respect to the card connector 100. Moreover, this arrangement allows a sound positioning of the shielding tray 110 on the base 120.

[0048] In another embodiment illustrated by FIGs. 10 and 11, a guiding wing 160 may be arrange on the shielding tray 110, particularly on the surrounding portion 113, extending outwards and away from the flat portion 112. As shown in the sectional view of FIG. 11, a groove 170 may be arranged on the base 120 to interact with the guiding wing 160 and to facilitate installing the shielding tray 110 to the base 120 from a direction parallel to the surface of the base 120 (for example, D₂ as shown in FIG. 8). In addition, the guiding wing 160 and the groove 170 further prevent the shielding tray 110 from moving in a direction perpendicular to the surface of the base 120 (for example, Di as shown in FIG. 8) once having been installed to the base 120. [0049] In another embodiment, additional fasteners (not shown) may be arranged on the base 120 so as to prevent the shielding tray 110 from moving away from the base 120. It is to be understood that there is no fixing portion shown in FIGs. 10 and 11 for the sake of clarity. However, a fixing portion of any appropriate shape may be used for this particular embodiment.

[0050] The card connector according to the embodiments of the subject matter described herein allows the shielding tray to be installed in a flexible way. Meanwhile, the shielding performance is maximized once the shielding tray is installed to the base. In addition, the structure can be relatively simple and the number of parts required can be relatively small, making the manufacturing of the card connector cost efficient.

[0051] The above examples are described only for the purpose of illustration, without suggesting any limitations as to the scope of the subject matter described herein. Any additional or alternative materials can be used to make the components of the switch.

[0052] It is to be understood that "top", "bottom", "front", "rear", "side", "lateral" and the like are only used to describe the relationship between the components in the figures, instead of limiting their orientation or positioning. For example, in FIG. 2, the shielding tray 110 can be seen as being placed above the base 120, and can also be seen as being placed underneath the base 120.

[0053] According to another aspect of the embodiments of the subject matter described herein, a mobile device 1200 is shown in FIG. 12. The mobile device 1200 includes a main body 1230; a card connector 1210 including: a base 1212 fixed to the main body 1230; a grounding contact 1214 positioned on the base 1212; and a shielding tray 1211 for holding a SIM card 1220, the shielding tray 1211 being operable to form a detachable connection with the base 1212, wherein the shielding tray 1211 includes a fixing portion 1213 operable to fix the SIM card 1220 in position within the shielding tray 1211 and mate with a grounding contact 1214; and a battery 1240 to be installed to the main body 1230, abutting against the shielding tray 1211 in case that the shielding tray 1211 is installed to the base 1212.

[0054] In one embodiment, the shielding tray 1211 may comprise a flat portion and a surrounding portion, the flat portion and the surrounding portion defining a space for holding the card, and wherein the fixing portion 1213 is formed on the surrounding portion. [0055] Additionally, the fixing portion 1213 may include a protrusion arranged on a first side of the surrounding portion; and a recess arranged on a second side of the surrounding portion, the second side being opposite to the first side.

[0056] Further additionally, the recess may be operable to mate with the grounding contact to ground the shielding tray 1211 and detachably fix the shielding tray 1211 to the base 1212.

[0057] In another embodiment, the grounding contact 1214 is shaped in a curved surface to facilitate connecting the shielding tray 1211 to the base 1212 from one of the following: a first direction perpendicular to a surface of the base, or a second direction parallel to the surface of the base.

[0058] With reference to FIG. 13, it illustrates a block diagram of a method 1300 of manufacturing the card connector 100 in accordance with embodiments of the subject matter described herein. The method 1300 is entered at step S1301, where a base including a grounding contact is provided.

[0059] At step S1302, a shielding tray for holding a card is provided, the shielding tray being operable to form a detachable connection with the base, in which the shielding tray includes a fixing portion operable to both fix the card in position within the shielding tray and mate with the grounding contact.

[0060] In one embodiment, the method may further include providing a flat portion and a surrounding portion on the shielding tray, the flat portion and the surrounding portion defining a space for holding the card, and wherein the fixing portion is formed on the surrounding portion.

[0061] Additionally, the method may further include providing a protrusion arranged on a first side of the surrounding portion; and providing a recess arranged on a second side of the surrounding portion, the second side being opposite to the first side.

[0062] Additionally, the recess may be operable to mate with the grounding contact in order to ground the shielding tray and detachably fix the shielding tray to the base.

[0063] In another embodiment, the method may further include providing the grounding contact shaped in a curved surface to facilitate installing the shielding tray to the base from one of the following: a first direction perpendicular to a surface of the base, or a second direction parallel to the surface of the base.

[0064] While operations are depicted in a particular order in the above descriptions, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several details are contained in the above discussions, these should not be construed as limitations on the scope of the subject matter described herein, but rather as descriptions of features that may be specific to particular embodiments. Certain features that are described in the context of separate embodiments may also be implemented in combination in a single embodiment. On the other hand, various features that are described in the context of a single embodiment may also be implemented in multiple embodiments separately or in any suitable sub-combination.

[0065] Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.

Claims

1. A card connector compri sing :

a base including a grounding contact; and

a shielding tray for holding a card, the shielding tray being operable to form a detachable connection with the base,

wherein the shielding tray comprises a fixing portion operable to fix the card in position within the shielding tray and mate with the grounding contact, whereby the shielding tray is electrically grounded.

2. The card connector according to Claim 1, wherein the shielding tray comprises a flat portion and a surrounding portion, the flat portion and the surrounding portion defining a space for holding the card, and

wherein the fixing portion is formed on the surrounding portion.

3. The card connector according to Claim 2, wherein the flat portion covers a predetermined percentage of a surface area of the card in case that the card is fixed in position within the shielding tray.

4. The card connector according to Claim 2, wherein the fixing portion comprises:

a protrusion arranged on a first side of the surrounding portion; and

a recess arranged on a second side of the surrounding portion, the second side being opposite to the first side.

5. The card connector according to Claim 4, wherein the recess is operable to mate with the grounding contact to ground the shielding tray and detachably fix the shielding tray to the base.

6. The card connector according to Claim 1, further comprising:

a detecting contact arranged on the base and operable to be deformed in case that the fixing portion mates with the grounding contact and the card is fixed in the shielding tray.

7. The card connector according to Claim 1, wherein the shielding tray comprises:

a spring and a stopper,

wherein the spring applies force on the card against the stopper in case that the card is fixed in the shielding tray.

8. A mobile device comprising:

a main body;

a card connector including:

a base fixed to the main body,

a grounding contact positioned on the base, and

a shielding tray for holding a subscriber identity module card, the shielding tray being operable to form a detachable connection with the base, wherein the shielding tray comprises a fixing portion operable to fix the SIM card in position within the shielding tray and mate with the grounding contact, whereby the shielding tray is electrically grounded; and

a battery to be installed to the main body, abutting against the shielding tray in case that the shielding tray is installed to the base.

9. The mobile device according to Claim 8, wherein the shielding tray comprises a flat portion and a surrounding portion, the flat portion and the surrounding portion defining a space for holding the card, and

wherein the fixing portion is formed on the surrounding portion.

10. The mobile device according to Claim 9, wherein the fixing portion comprises:

a protrusion arranged on a first side of the surrounding portion; and

11. The mobile device according to Claim 10, wherein the recess is operable to mate with the grounding contact to ground the shielding tray and detachably fix the shielding tray to the base.

12. A method of manufacturing a card connector comprising:

providing a base including a grounding contact; and

providing a shielding tray for holding a card, the shielding tray being operable to form a detachable connection with the base,

13. The method according to Claim 12, further comprising:

providing a flat portion and a surrounding portion on the shielding tray, the flat portion and the surrounding portion defining a space for holding the card, and

wherein the fixing portion is formed on the surrounding portion.

14. The method according to Claim 13, further comprising:

providing a protrusion arranged on a first side of the surrounding portion; and providing a recess arranged on a second side of the surrounding portion, the second side being opposite to the first side.

15. The method according to Claim 14, wherein the recess is operable to mate with the grounding contact in order to ground the shielding tray and detachably fix the shielding tray to the base.