A card slot for preventing mobile phone cards from falling off

Abstract

The present invention discloses a card slot for preventing a mobile phone card from falling off, and relates to the technical field of mobile phone card trays, including a card seat, the card seat is fixedly arranged inside a mobile phone, and has an opening facing the side of the mobile phone; a card tray, the card tray is placed inside the card seat, and a square card slot for placing a SIM card is opened on the side of the card tray; a stabilizing mechanism, used to strengthen the connection between the SIM card and the card tray, including a rubber pad and a spring sheet inside the square card slot, the rubber pad and the spring sheet are respectively located on different sides of the square card slot; and a pop-up mechanism, used to pop the card tray out of the card seat. The card slot for preventing a mobile phone card from falling off, when placing a SIM card, adds a connection method between the SIM card and the card slot to make the connection between the two more stable, effectively avoiding the problem of the SIM card falling off when placing and taking the SIM card, and the device does not need a card removal needle when taking the card, avoiding the embarrassment of the user being unable to take out the SIM card in time due to the loss of the card removal needle.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile phone card holders, and in particular to a card slot for preventing mobile phone cards from falling off. Background Art

[0002] The mobile phone card tray, also known as the SIM card tray or SIM card holder, is a device inside the mobile phone that is used to fix and connect the SIM card. In early flip phones, the mobile phone SIM card was generally placed under the battery on the back cover of the phone. With the emergence of smart phones, the integration of the mobile phone itself has been strengthened, and the back cover is difficult to open easily. The SIM card is placed on the side of the phone through the mobile phone card tray, and the size of the SIM card itself is getting smaller and smaller.

[0003] After the existing SIM card is installed in a mobile phone, a card pin or a slender object of suitable size is needed to unlock the card tray. However, the card pin is small and easy to lose, which often causes the mobile phone user to be unable to remove the card tray in time. Therefore, a card removal method that does not require a card pin is needed. In addition, since the SIM card is light, the card is easy to fall out of the card slot after the mobile phone user installs the card, causing the SIM card to be worn. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] The technical problem to be solved by the present invention is to provide a card slot that prevents mobile phone cards from falling out, so that mobile phone users can take out the SIM card without relying on a card pin and strengthen the connection between the SIM card and the card slot.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a card slot for preventing a mobile phone card from falling, comprising a card holder, the card holder is fixedly arranged inside the mobile phone and has an opening facing the side of the mobile phone;

[0007] A card tray is placed inside the card holder, and a square card slot for placing a SIM card is provided on the side of the card tray;

[0008] A stabilizing mechanism, used to strengthen the connection between the SIM card and the card tray, comprising a rubber pad and a spring sheet inside the square card slot, wherein the rubber pad and the spring sheet are respectively located on different sides of the square card slot;

[0009] The ejection mechanism is used to eject the card tray from the card holder, and comprises a clamping member arranged on the inner side of the card holder, elastic members arranged on both sides of the card tray, and a conversion member arranged on the end of the card tray.

[0010] As a preferred solution of the card slot for preventing mobile phone cards from falling described in the present invention, a group of rubber pads and spring sheets are arranged on the inner side of each of the square card slots, the rubber pads are adhered to the inner edge of the square card slot, and multiple spring sheets are arranged and fixedly arranged on the side of the square card slot opposite to the rubber pad.

[0011] As a preferred solution of the card slot for preventing the mobile phone card from falling described in the present invention, the stabilizing mechanism also includes a fixing block and a sliding hole, the fixing block is located at the opening of the card holder, the upper and lower ends of the fixing block are respectively fixedly arranged on the upper and lower sides of the inner wall of the card holder, the sliding hole is opened on both sides of the card holder, the fixing block is located inside the sliding hole and is slidably connected to the inner side of the sliding hole.

[0012] As a preferred solution of the card slot for preventing the mobile phone card from falling described in the present invention, the clamping member includes a card block, a clamping rod, a reset spring 1, a guide wheel, a rubber belt, an extrusion plate, a push rod and a reset spring 2, the card block is fixedly arranged on the side of the card holder, the clamping rod is rotatably arranged on the inner wall of the card seat, the two ends of the reset spring 1 are respectively fixedly arranged on the side of the clamping rod and the inner wall of the card seat, and the reset spring 1 pulls the clamping rod toward the side away from the card block.

[0013] As a preferred solution of the card slot for preventing the mobile phone card from falling described in the present invention, wherein: a pair of guide wheels are arranged on the side of each clamping rod close to the SIM card, the guide wheels are rotatably arranged on the side of the clamping rod, the rubber belt is sleeved on the side of the two guide wheels, and the rubber belt abuts against the side of the card tray.

[0014] As a preferred solution of the card slot for preventing mobile phone cards from falling described in the present invention, wherein: the extrusion plate is arranged on the side of the card tray away from the opening of the card holder, the push rod is slidably arranged on the inner side of the card holder through the bracket, one end of the push rod abuts against the side of the extrusion plate, and the other end abuts against the end of the clamping rod away from the card block, the second reset spring is wrapped around the outside of the push rod, one end of the second reset spring is fixedly arranged on the side of the push rod, and the other end is fixedly arranged on the side of the push rod bracket, and the second reset spring pulls the push rod toward the side away from the clamping rod.

[0015] As a preferred solution of the card slot for preventing mobile phone cards from falling described in the present invention, the elastic member includes a side ear plate, a support plate, an ejection spring, a top plate and a limit rod, the side ear plate is fixedly arranged on the side of the card holder and slidingly cooperates with the inner wall of the card holder, the support plate is fixedly arranged on the inner side of the card holder, the ejection spring is fixedly arranged on the side of the side ear plate, the top plate is fixedly arranged on the side of the ejection spring away from the support plate, the top plate abuts against the side of the side ear plate, and the limit rod is fixedly arranged on the side of the top plate and passes through the center of the support plate.

[0016] As a preferred solution of the card slot for preventing the mobile phone card from falling described in the present invention, wherein: the conversion part includes a fixed shell, a card slot, a rotating rod, a card rod, a rotating plate and a clamping spring, the fixed shell is located on the side of the card holder close to the extrusion plate, the fixed shell is fixedly arranged on the inner wall of the card holder, the inner side of the fixed shell is hollow, and the card slot is opened on the inner side of the fixed shell.

[0017] As a preferred solution of the card slot for preventing the mobile phone card from falling described in the present invention, the rotating rod is rotatably arranged at one end of the card holder close to the fixed shell, the card rod is rotatably arranged at one end of the rotating rod away from the card holder, and the positions of the rotating rod and the card rod are opposite to the fixed shell.

[0018] As a preferred solution of the card slot for preventing the mobile phone card from falling described in the present invention, the rotating plate is rotatably arranged on the inner side of the fixed shell, the rotating plate is located directly above the card slot, one end of the rotating plate abuts against the inner side of the card slot, and the other end is slightly higher than the highest point of the side of the card slot, the two ends of the clamping spring are respectively fixed on the side of the rotating plate and the inner side of the fixed shell, and under the action of the clamping spring, the end of the rotating rod is tightly attached to the inner side of the card slot.

[0019] The beneficial effects of the present invention are as follows: when a SIM card is placed in the card slot, a connection method is added between the SIM card and the card slot to make the connection between the two more stable, effectively avoiding the problem of the SIM card falling when taking and placing the SIM card, and the device does not need a card removal needle when taking the card, avoiding the embarrassment of the user not being able to take out the SIM card in time due to the loss of the card removal needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0021] Figure 1 It is a schematic diagram of the connection between the card tray and the card holder of the present invention.

[0022] Figure 2 It is a schematic diagram of the internal structure of the card holder of the present invention.

[0023] Figure 3 It is a schematic diagram of the structure of the stabilizing mechanism of the present invention.

[0024] Figure 4 It is a schematic diagram of the structure of the ejection mechanism of the present invention.

[0025] Figure 5 For the present invention Figure 4 Schematic diagram of the enlarged structure of A.

[0026] Figure 6 It is a schematic diagram of the fixed shell structure of the present invention.

[0027] Figure 7 It is a schematic diagram of the rotating plate structure of the present invention.

[0028] Reference numerals: 100, card holder; 200, card tray; 300, square card slot; 400, stabilizing mechanism; 401, rubber pad; 402, spring sheet; 403, fixing block; 404, sliding hole; 500, ejection mechanism; 501, clamping member; 501a, card block; 501b, clamping rod; 501c, return spring 1; 501d, guide wheel; 501e, rubber belt; 501f, extrusion Pressure plate; 501g, push rod; 501h, return spring 2; 502, elastic member; 502a, side ear plate; 502b, support plate; 502c, ejection spring; 502d, push plate; 502e, limit rod; 503, conversion member; 503a, fixed shell; 503b, snap-in groove; 503c, rotating rod; 503d, snap rod; 503e, rotating plate; 503f, compression spring. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0032] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0033] Example 1

[0034] Reference Figure 1 to Figure 4, which is the first embodiment of the present invention, provides a card slot for preventing a mobile phone card from falling, comprising:

[0035] The card holder 100 is fixedly arranged inside the mobile phone and has an opening facing the side of the mobile phone;

[0036] The card tray 200 is placed inside the card holder 100, and a square card slot 300 for placing a SIM card is provided on the side of the card tray 200;

[0037] The stabilizing mechanism 400 is used to strengthen the connection between the SIM card and the card tray 200, including a rubber pad 401 and a spring sheet 402 inside the square card slot 300, and the rubber pad 401 and the spring sheet 402 are respectively located on different sides of the square card slot 300;

[0038] The ejection mechanism 500 is used to eject the card tray 200 from the card holder 100 , and includes a clamping member 501 disposed on the inner side of the card holder 100 , elastic members 502 disposed on both sides of the card tray 200 , and a conversion member 503 disposed at the end of the card tray 200 .

[0039] Example 2

[0040] Reference Figure 3-4 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that a group of rubber pads 401 and spring sheets 402 are arranged on the inner side of each square card slot 300, the rubber pad 401 is adhered to the inner edge of the square card slot 300, and a plurality of spring sheets 402 are arranged and fixedly arranged on the side of the square card slot 300 opposite to the rubber pad 401.

[0041] The stabilizing mechanism 400 also includes a fixed block 403 and a sliding hole 404. The fixed block 403 is located at the opening of the card holder 100. The upper and lower ends of the fixed block 403 are respectively fixed on the upper and lower sides of the inner wall of the card holder 100. The sliding hole 404 is opened on both sides of the card holder 200. The fixed block 403 is located inside the sliding hole 404 and is slidably connected to the inner side of the sliding hole 404.

[0042] When in use: Compared with the existing method of directly placing the SIM card inside the card slot, a rubber pad 401 and a spring sheet 402 are also installed on the inner side of the square card slot 300. When installing, first squeeze the SIM card into the bottom of the spring sheet 402 from one side of the SIM card, and then press the SIM card into the inside of the square card slot 300 from the other side, so that the SIM card and the rubber pad 401 are in contact.

[0043] The spring sheet 402 is relatively thin and is connected to the card tray 200 by welding, which does not increase the thickness of the card tray 200 and thus does not affect the transmission of the SIM card signal. The rubber pad 401 can increase the friction between the SIM card and the square card slot 300, thereby strengthening the connection between the SIM card and the square card slot 300. In order to further prevent the SIM card from falling out, the fixing block 403 is arranged inside the sliding hole 404, so that the card tray 200 and the card holder 100 are connected together, and the card tray 200 cannot be completely removed. In this way, while not affecting the placement of the SIM card, it also ensures that the card tray 200 will not fall out of the mobile phone card holder 100 due to accidental touch.

[0044] The remaining structures are the same as those of Example 1.

[0045] Example 3

[0046] Reference Figure 3 to Figure 7 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: the clamping member 501 includes a clamping block 501a, a clamping rod 501b, a return spring 501c, a guide wheel 501d, a rubber belt 501e, an extrusion plate 501f, a push rod 501g and a return spring 501h. The clamping block 501a is fixedly arranged on the side of the card holder 200, the clamping rod 501b is rotatably arranged on the inner wall of the card holder 100, and the two ends of the return spring 501c are respectively fixedly arranged on the side of the clamping rod 501b and the inner wall of the card holder 100, and the return spring 501c pulls the clamping rod 501b toward the side away from the clamping block 501a.

[0047] A pair of guide wheels 501d is provided on one side of each clamping rod 501b close to the SIM card. The guide wheels 501d are rotatably provided on the side of the clamping rod 501b. The rubber belt 501e is sleeved on the sides of the two guide wheels 501d, and the rubber belt 501e abuts against the side of the card tray 200.

[0048] The extrusion plate 501f is arranged on the side of the card holder 200 away from the opening of the card holder 100, the push rod 501g is slidably arranged on the inner side of the card holder 100 through the bracket, one end of the push rod 501g abuts against the side of the extrusion plate 501f, and the other end abuts against the end of the clamping rod 501b away from the block 501a, the second return spring 501h surrounds the outer side of the push rod 501g, one end of the second return spring 501h is fixedly arranged on the side of the push rod 501g, and the other end is fixedly arranged on the side of the support of the push rod 501g, and the second return spring 501h pulls the push rod 501g toward the side away from the clamping rod 501b. Among them, a pair of clamping members 501 are arranged symmetrically on both sides of the card holder 200.

[0049] The elastic member 502 includes a side ear plate 502a, a support plate 502b, an ejection spring 502c, a top plate 502d and a limiting rod 502e. The side ear plate 502a is fixedly arranged on the side of the card tray 200 and slidingly cooperates with the inner wall of the card holder 100. The support plate 502b is fixedly arranged on the inner side of the card holder 100. The ejection spring 502c is fixedly arranged on the side of the side ear plate 502a. The top plate 502d is fixedly arranged on the side of the ejection spring 502c away from the support plate 502b. The top plate 502d abuts against the side of the side ear plate 502a. The limiting rod 502e is fixedly arranged on the side of the top plate 502d and passes through the center of the support plate 502b.

[0050] There are a plurality of elastic members 502 symmetrically arranged on both sides of the card tray 200. Under the action of the ejection spring 502c, the top plate 502d always pushes the card tray 200 toward the side away from the inner side of the card holder 100, and the limiting rod 502e is used to limit the top plate 502d to prevent the top plate 502d from tilting when the ejection spring 502c is activated.

[0051] The conversion member 503 includes a fixed shell 503a, a snap-in groove 503b, a rotating rod 503c, a snap-in rod 503d, a rotating plate 503e and a clamping spring 503f. The fixed shell 503a is located on the side of the card tray 200 close to the extrusion plate 501f. The fixed shell 503a is fixedly set on the inner wall of the card base 100. The inner side of the fixed shell 503a is hollow, and the snap-in groove 503b is opened on the inner side of the fixed shell 503a.

[0052] The function of the conversion member 503 is mainly to lock and release the connection between the card tray 200 and the card holder 100 by pressing.

[0053] The rotating rod 503c is rotatably disposed at one end of the card holder 200 close to the fixed shell 503a, and the clamping rod 503d is rotatably disposed at one end of the rotating rod 503c away from the card holder 200. The rotating rod 503c and the clamping rod 503d are located opposite to the fixed shell 503a.

[0054] The rotating plate 503e is rotatably set on the inner side of the fixed shell 503a, and the rotating plate 503e is located directly above the clamping groove 503b. One end of the rotating plate 503e abuts against the inner side of the clamping groove 503b, and the other end is slightly higher than the highest point of the side of the clamping groove 503b. The two ends of the clamping spring 503f are respectively fixed on the side of the rotating plate 503e and the inner side of the fixed shell 503a. Under the action of the clamping spring 503f, the end of the rotating rod 503c is tightly attached to the inner side of the clamping groove 503b.

[0055] When in use: The purpose of the ejection mechanism 500 is to replace the original card tray 200's ejection method using a card pin with a push-type ejection method.

[0056] After the SIM card is installed into the square card slot 300, the card tray 200 is inserted into the card holder 100 again. When the card tray 200 slides down, human power pushes the card tray 200 and overcomes the elastic force of the ejection spring 502c. As the extrusion plate 501f abuts against the ejector rod 501g, the ejector rod 501g moves sideways and abuts against the side of the clamping rod 501b, so that the clamping rod 501b overcomes the elastic force of the return spring 501c and rotates toward the side close to the card block 501a, and finally abuts against the side of the card block 501a.

[0057] At the same time, the rotating rod 503c drives the card rod 503d to slide into the cavity of the fixed shell 503a and slide along the inclined surface of the cavity, and finally slides into the card slot 503b through the gap between the rotating plate 503e and the card slot 503b. After the card rod 503d slides into the card slot 503b, the user can let go. Due to the elastic force of the ejection spring 502c, the card tray 200 moves back slightly, but because the card rod 503d and the card slot 503b are engaged, the card tray 200 is finally fixed inside the card holder 100.

[0058] If you want to take out the card tray 200, you only need to press the card tray 200 again, and the card tray 200 will move toward the inside of the mobile phone again, and the card rod 503d will move accordingly and begin to squeeze the rotating plate 503e. After being squeezed, the rotating plate 503e overcomes the elastic force of the compression spring 503f and slightly rotates toward the side away from the clamping groove 503b, so that the card rod 503d slides to the other side of the rotating rod 503c. Then the user stops pressing, and under the action of the ejection spring 502c, the card tray 200 slides outward, and the card rod 503d and the rotating rod 503c move accordingly. Since the card rod 503d slides to the other side of the rotating plate 503e, when it is pulled back by the card tray 200, it directly slides along the inclined surface of the rotating plate 503e and finally slides out of the interior of the fixed shell 503a, thereby separating the card tray 200 from the card holder 100. As the card tray 200 moves, the ejector rod 501g loses the support of the squeezing plate 501f and is reset, and the clamp rod 501b is also reset by the reset spring 1 501c, and the card tray 200 loses its clamping and is directly ejected by the ejection spring 502c.

[0059] During the process of the card tray 200 being ejected, since the card tray 200 is in contact with the rubber belt 501e, and the rubber belt 501e is also squeezing the card tray 200 under the clamping force of the clamping rod 501b, the card tray 200 is also subjected to the friction of the rubber belt 501e while moving outward. This friction force serves to slow down the card tray 200, preventing the card tray 200 from being ejected too quickly and causing the SIM card to fly directly out of the square card slot 300.

[0060] In the above card removal method, no special tools are needed to remove the card tray 200. Instead, only a thin plate of suitable thickness is needed to remove the card tray 200, such as fingernails, keys, etc. Compared with a card removal pin, this card tray 200 removal method is more convenient.

[0061] The remaining structure is the same as that of Example 2.

[0062] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed may be composed of a plurality of parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete element may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0063] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0064] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0065] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A card slot for preventing a mobile phone card from falling, characterized in that: include, A card holder (100), the card holder (100) being fixedly arranged inside the mobile phone and having an opening facing a side of the mobile phone; A card tray (200), the card tray (200) being placed inside the card holder (100), and a square card slot (300) for placing a SIM card is provided on a side surface of the card tray (200); A stabilizing mechanism (400) for strengthening the connection between the SIM card and the card tray (200), comprising a rubber pad (401) and a spring sheet (402) inside the square card slot (300), wherein the rubber pad (401) and the spring sheet (402) are respectively located on different sides of the square card slot (300); The ejection mechanism (500) is used to eject the card tray (200) from the card holder (100), and comprises a clamping member (501) arranged on the inner side of the card holder (100), elastic members (502) arranged on both sides of the card tray (200), and a conversion member (503) arranged at the end of the card tray (200).

2. The card slot for preventing a mobile phone card from falling off according to claim 1, characterized in that: A group of rubber pads (401) and spring sheets (402) are arranged on the inner side of each of the square card slots (300); the rubber pads (401) are adhered to the inner edge of the square card slot (300); a plurality of spring sheets (402) are arranged and fixedly arranged on one side of the square card slot (300) opposite to the rubber pads (401).

3. The card slot for preventing a mobile phone card from falling off according to claim 2, characterized in that: The stabilizing mechanism (400) further comprises a fixing block (403) and a sliding hole (404), wherein the fixing block (403) is located at the opening of the card holder (100), and the upper and lower ends of the fixing block (403) are respectively fixedly arranged on the upper and lower sides of the inner wall of the card holder (100), and the sliding hole (404) is opened on both sides of the card holder (200), and the fixing block (403) is located inside the sliding hole (404) and is slidably connected to the inner side of the sliding hole (404).

4. The card slot for preventing a mobile phone card from falling off according to claim 3, characterized in that: The clamping member (501) comprises a clamping block (501a), a clamping rod (501b), a return spring 1 (501c), a guide wheel (501d), a rubber belt (501e), an extrusion plate (501f), a push rod (501g) and a return spring 2 (501h); the clamping block (501a) is fixedly arranged on the side of the card holder (200); the clamping rod (501b) is rotatably arranged on the inner wall of the card holder (100); the two ends of the return spring 1 (501c) are respectively fixedly arranged on the side of the clamping rod (501b) and the inner wall of the card holder (100); the return spring 1 (501c) pulls the clamping rod (501b) toward a side away from the clamping block (501a).

5. The card slot for preventing a mobile phone card from falling off according to claim 4, characterized in that: A pair of guide wheels (501d) is arranged on one side of each clamping rod (501b) close to the SIM card, and the guide wheels (501d) are rotatably arranged on the side of the clamping rod (501b). The rubber belt (501e) is sleeved on the side of the two guide wheels (501d), and the rubber belt (501e) abuts against the side of the card tray (200).

6. The card slot for preventing a mobile phone card from falling off according to claim 5, characterized in that: The extrusion plate (501f) is arranged on a side of the card holder (200) away from the opening of the card base (100), and the push rod (501g) is slidably arranged on the inner side of the card base (100) through a bracket. One end of the push rod (501g) abuts against the side of the extrusion plate (501f), and the other end abuts against the end of the clamping rod (501b) away from the block (501a). The second return spring (501h) surrounds the outer side of the push rod (501g), one end of the second return spring (501h) is fixedly arranged on the side of the push rod (501g), and the other end is fixedly arranged on the side of the push rod (501g) bracket. The second return spring (501h) pulls the push rod (501g) toward the side away from the clamping rod (501b).

7. The card slot for preventing a mobile phone card from falling off according to claim 6, characterized in that: The elastic member (502) includes a side ear plate (502a), a support plate (502b), an ejection spring (502c), a top plate (502d) and a limiting rod (502e); the side ear plate (502a) is fixedly arranged on the side of the card holder (200) and slidingly cooperates with the inner wall of the card holder (100); the support plate (502b) is fixedly arranged on the inner side of the card holder (100); the ejection spring (502c) is fixedly arranged on the side of the side ear plate (502a); the top plate (502d) is fixedly arranged on the side of the ejection spring (502c) away from the support plate (502b); the top plate (502d) abuts against the side of the side ear plate (502a); and the limiting rod (502e) is fixedly arranged on the side of the top plate (502d) and penetrates through the center of the support plate (502b).

8. The card slot for preventing a mobile phone card from falling off according to claim 7, characterized in that: The conversion member (503) comprises a fixed shell (503a), a snap-fit ​​groove (503b), a rotating rod (503c), a snap-fit ​​rod (503d), a rotating plate (503e) and a pressing spring (503f); the fixed block (403) is located on a side of the card holder (200) close to the extrusion plate (501f); the fixed shell (503a) is fixedly arranged on the inner wall of the card holder (100); the inner side of the fixed shell (503a) is hollow; and the snap-fit ​​groove (503b) is provided on the inner side of the fixed shell (503a).

9. The card slot for preventing a mobile phone card from falling off according to claim 8, characterized in that: The rotating rod (503c) is rotatably arranged at one end of the card holder (200) close to the fixed shell (503a), and the clamping rod (503d) is rotatably arranged at one end of the rotating rod (503c) away from the card holder (200), and the positions of the rotating rod (503c) and the clamping rod (503d) are directly opposite to the fixed shell (503a).

10. The card slot for preventing a mobile phone card from falling off according to claim 9, characterized in that: The rotating plate (503e) is rotatably arranged on the inner side of the fixed shell (503a), and the rotating plate (503e) is located directly above the clamping groove (503b). One end of the rotating plate (503e) abuts against the inner side of the clamping groove (503b), and the other end is slightly higher than the highest point of the side of the clamping groove (503b). The two ends of the clamping spring (503f) are respectively fixedly arranged on the side of the rotating plate (503e) and the inner side of the fixed shell (503a). Under the action of the clamping spring (503f), the end of the rotating rod (503c) is tightly attached to the inner side of the clamping groove (503b).

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