Hollowed-out mobile phone shell capacitance pen combined structure and use method thereof

Abstract

The invention discloses a hollow mobile phone shell capacitance pen combination structure and a use method thereof, the hollow mobile phone shell capacitance pen combination structure is applied to a mobile phone, the hollow mobile phone shell capacitance pen combination structure comprises a first shell, a second shell and a capacitance pen, one end of the first shell is provided with a first coating area, the first coating area is used for coating and protecting a first end of the mobile phone, and the other end of the first shell is provided with a first extension part; one end of the second shell is provided with a first wrapping area used for wrapping and protecting the second end of the mobile phone, the other end of the second shell is provided with a second extension part used for being applied to the back side of the mobile phone, and the first extension part is detachably connected with the second extension part. Hollow areas are arranged in the first extension part, the second extension part and between the first extension part and the second extension part, and the capacitance pen is detachably connected in the first extension part and the second extension part. The storage box has the advantages of stable storage, quick taking and use, convenience in use and the like.

Description

Technical Field

[0001] This invention belongs to the technical field of electronic device accessories, specifically relating to a hollowed-out mobile phone case capacitive pen combination structure and its usage method. Background Technology

[0002] As smartphones become increasingly feature-rich, capacitive pens, with their core advantage of precise operation, have gradually transitioned from being accessories exclusively for professional users to becoming common tools for the general public. Whether it's document annotation for professionals, mobile sketching for designers, electronic note-taking for students, marking up mistakes in children's work, or impromptu doodles for artists, capacitive pens, with their natural, paper-like interaction, have become a key accessory for improving smartphone efficiency and user experience. Especially with the rise of large-screen smartphones, the precise positioning and pressure feedback of capacitive pens further fill the gaps in fine-tuning touchscreen operations, and their applications continue to expand into multiple fields.

[0003] However, the user experience of existing capacitive pens still has significant pain points. The vast majority of capacitive pens are designed independently, not directly linked to the phone or phone case. Users need to store them separately in a pocket, backpack, or dedicated pen case, which not only takes up extra space but is also prone to loss due to carelessness. Loss not only results in financial loss but also directly interrupts work and study processes that rely on the capacitive pen. Some users choose to put the capacitive pen in their bag with their phone to avoid loss, but this easily leads to the pen body getting tangled and worn with accessories such as data cables and earphones, affecting the lifespan of the capacitive pen.

[0004] Meanwhile, traditional phone cases are still limited to basic protection, focusing only on core needs such as drop and scratch prevention, and lacking consideration for the collaborative design of frequently used accessories. In the current market, a few products that claim to support capacitive stylus storage either have bulky and cumbersome storage structures that seriously affect the grip and portability of the phone, or have simple fixing methods that only use simple slots to fix the stylus, causing it to easily slip out during movement. They not only fail to solve the core storage problem, but also sacrifice the original user experience of the phone case.

[0005] Against the backdrop of consumption upgrading, users' demands for mobile phone accessories have shifted from "single-function fulfillment" to a comprehensive experience of "integration, convenience, and scenario-based solutions." The disconnect between independent capacitive pens and traditional phone cases is no longer suitable for users' needs in various scenarios such as commuting, business trips, and studying. Therefore, designing an integrated structure that cleverly combines the protective function of a phone case with the storage needs of a capacitive pen, ensuring both the thinness and protection of the phone case and the stable storage and convenient access of the capacitive pen, has become a key direction for optimizing the user experience of mobile phones and accessories and filling market gaps. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, the present invention provides a hollowed-out mobile phone case capacitive pen combination structure and its usage method, which can be stably stored, quickly accessed, and conveniently used.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A hollowed-out phone case with a capacitive stylus pen assembly structure, used in mobile phones, including: A first housing, one end of which is provided with a first covering area for covering and protecting the first end of the mobile phone, and the other end of which is provided with a first extension for the back side of the mobile phone. The second housing has a second covering area at one end for covering and protecting the second end of the phone. The other end of the second housing has a second extension applied to the back side of the phone. The first extension and the second extension are detachably connected. Hollow areas are provided inside the first extension, inside the second extension, and between the first extension and the second extension. And a capacitive pen, which is detachably connected within the first extension and the second extension.

[0008] It also includes a connecting block. The bottom of the first extension is provided with a first groove and a second groove at a distance from front to back. The end of the first groove away from the second extension is provided with a first mounting hole. The end of the second groove away from the second extension is provided with a second mounting hole. A first spring is provided in the first mounting hole. A second spring is provided in the second mounting hole. A first connector is provided in the first groove. A second connector is provided in the second groove. The first end of the first connector is sleeved on the first spring and the first end of the first connector is provided with a first protrusion. The second end of the first connector is provided with a first hook. The first end of the second connector is sleeved on the second spring and the first end of the second connector is provided with a second protrusion. The second end of the second connector is provided with a second hook. The second extension is provided with a first protrusion and a second protrusion at intervals on the side near the first extension. The first protrusion and the second protrusion are respectively provided with a first through hole and a second through hole. The first protrusion is adapted to be installed in the first groove on the side of the first protrusion near the second extension. The second protrusion is adapted to be installed in the second groove on the side of the second protrusion near the second extension. The first hook is engaged in the first through hole and the second hook is engaged in the second through hole. The connecting block is connected to the first extension by screws and both the first protrusion and the second protrusion are engaged in the connecting block.

[0009] Preferably, an adapter groove is provided between the first extension and the second extension, and the capacitive pen is detachably connected to the adapter groove.

[0010] Preferably, the capacitive pen is magnetically connected to the adapter slot.

[0011] Preferably, the adapter groove is provided with a silicone anti-slip pad or an anti-slip coating.

[0012] Preferably, the body of the capacitive pen is flat or cylindrical.

[0013] Preferably, both the first housing and the second housing are made of metal.

[0014] Preferably, the second housing has a notch at the center of its bottom side at the end away from the first housing.

[0015] This invention also discloses a method for using the above-mentioned hollowed-out mobile phone case capacitive stylus combination structure, including the following steps: S1. Take the first housing and the second housing, and fit the first housing and the second housing onto the two ends of the mobile phone respectively. Then, install the first spring into the first mounting hole and the second spring into the second mounting hole. Next, take the first connector and the second connector, and set the first connector in the first groove and fit the first end of the first connector onto the first spring. Then, set the second connector in the second groove and fit the first end of the second connector onto the second spring. Next, fit the first protrusion into the first groove on the side of the first protrusion near the second extension, fit the second protrusion into the second groove on the side of the second protrusion near the second extension, and fit the first hook into the first through hole and the second hook into the second through hole. S2. Take the screw and the connecting block, insert the connecting block between the bottom sides of the first extension and the second extension so that the first protrusion and the second protrusion are both engaged on the connecting block, and then pass the screw through the connecting block to connect to the first extension. S3. Take the capacitive pen and connect it into the adapter slot along the direction from the notch to the first extension. After installation, when you need to use the capacitive pen, remove it along the direction from the first extension to the notch.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects: This invention provides a hollowed-out mobile phone case capacitive pen combination structure and its usage method, realizing the combination of capacitive pen and mobile phone case. In specific applications, it can achieve stable storage of capacitive pen, improve functionality and convenience, and make it easy to quickly retrieve and put away the capacitive pen when using the mobile phone, while ensuring the protection effect of the mobile phone and making it convenient to use. In summary, this invention has the advantages of stable storage, quick access, and ease of use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention when used in conjunction with a mobile phone; Figure 2 yes Figure 1A schematic diagram of the structure when the capacitive stylus and the mobile phone are removed; Figure 3 yes Figure 2 A structural diagram from another direction; Figure 4 yes Figure 3 A schematic diagram of the structure after removing the connecting block and screws; Figure 5 yes Figure 4 A structural diagram showing the structure with the second shell, first connector, and second connector removed. Figure 6 yes Figure 4 A structural diagram showing the structure after removing the first housing, the first connector, and the second connector; The components include: a first housing 1, a first extension 2, a second housing 3, a second extension 4, a capacitive pen 5, a connecting block 6, a first groove 7, a second groove 8, a first spring 9, a second spring 10, a first connector 11, a second connector 12, a first protrusion 13, a first hook 14, a second protrusion 15, a second hook 16, a first extension 17, a second extension 18, an adapter groove 19, and a notch 20. Detailed Implementation

[0018] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0020] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Example 1 In this embodiment, a hollowed-out mobile phone case capacitive pen 5 combination structure and its usage method are proposed. It can realize the structure of capacitive pen 5 and mobile phone case. The mobile phone case is made of metal hollow material to reduce weight as much as possible and protect the mobile phone case. The capacitive pen 5 can be taken out and stored at any time, which is convenient to use and solves the problem of existing capacitive pens 5 needing to be used frequently but not easy to store. It should be noted that the back side of the mobile phone described in this application is the side of the mobile phone that is not the display screen when the mobile phone is in normal use.

[0024] like Figures 1-6 As shown, in one embodiment of the present invention, the hollowed-out mobile phone case capacitive pen 5 assembly structure of the present invention is applied to a mobile phone (the present invention can also be adapted to electronic devices such as tablet computers), specifically including a first shell 1, a second shell 3, a capacitive pen 5, and a connecting block 6. One end of the first shell 1 is provided with a first covering area, which is used to cover and protect the first end of the mobile phone. The other end of the first shell 1 is provided with a first extension 2, which is applied to the back side of the mobile phone. One end of the second shell 3 is provided with a second covering area, which is used to cover and protect the second end of the mobile phone. The other end of the second shell 3 is provided with a second extension 4, which is applied to the back side of the mobile phone. The first extension 2 and the second extension 4 are detachably connected. Hollowed-out areas are provided in the first extension 2, the second extension 4, and between the first extension 2 and the second extension 4. The capacitive pen 5 is detachably connected in the first extension 2 and the second extension 4.

[0025] Please continue to refer to Figures 1-6The bottom of the first extension 2 is provided with a first groove 7 and a second groove 8 spaced apart. The end of the first groove 7 away from the second extension 4 is provided with a first mounting hole (blind hole). The end of the second groove 8 away from the second extension 4 is provided with a second mounting hole (blind hole). A first spring 9 is provided in the first mounting hole and a second spring 10 is provided in the second mounting hole. A first connector 11 is provided in the first groove 7 and a second connector 12 is provided in the second groove 8. The first end of the first connector 11 is sleeved on the first spring 9 and the first end of the first connector 11 is provided with a first protrusion 13. The second end of the first connector 11 is provided with a first hook 14. The first end of the second connector 12 is sleeved on the second spring 10 and the first end of the second connector 12 is provided with a second protrusion 15. The second end of the second connector 12 is provided with a second hook 16. The second extension 4 has a first protrusion 17 and a second protrusion 18 spaced apart on the side near the first extension 2. The first protrusion 17 and the second protrusion 18 are respectively provided with a first through hole and a second through hole. The first protrusion 17 is adapted to be installed in the first groove 7 on the side of the first protrusion 13 near the second extension 4. The second protrusion 18 is adapted to be installed in the second groove 8 on the side of the second protrusion 15 near the second extension 4. The first hook part 14 is engaged in the first through hole, and the second hook part 16 is engaged in the second through hole. The connecting block 6 is connected to the first extension 2 by screws, and the first protrusion 13 and the second protrusion 15 are both engaged in the connecting block 6. The bottom side of the second housing 3 away from the first housing 1 has a notch 20 in the middle. The width of the notch 20 is slightly larger than the diameter or thickness of the capacitive pen 5, so that the user can insert his finger into the notch 20 and quickly pick up the capacitive pen 5, improving the ease of use.

[0026] The various components of this invention work together to achieve mobile phone protection, stable connection, and storage of the capacitive stylus 5, as explained in more detail below: First housing 1: One end of the first housing 1 is provided with a first covering area. The shape of the first covering area is adapted to the outline of the first end of the mobile phone (such as the top or bottom) to completely cover and protect the first end of the mobile phone and prevent the end from being damaged by collision or scratch. The other end of the first housing 1 is integrally formed with a first extension 2. The first extension 2 extends along the length direction of the mobile phone and fits the back side of the mobile phone without obstructing the core functional areas such as the mobile phone screen and camera.

[0027] Second housing 3: One end of the second housing 3 is provided with a second covering area, which is adapted to the contour of the second end of the phone (the end opposite to the first end) and is used to cover and protect the second end of the phone. The other end of the second housing 3 is integrally formed with a second extension 4, which is also fitted to the back side of the phone and is arranged opposite to the first extension 2 along the length direction of the back side of the phone. The two are detachably connected, which facilitates assembly, disassembly and replacement. At the same time, hollow areas are provided in the first extension 2, the second extension 4, and between the first extension 2 and the second extension 4. This can reduce the weight of the entire assembly structure, improve portability and grip, and enhance the heat dissipation performance of the back of the phone, preventing heat accumulation during phone use.

[0028] Connecting block 6 and detachable connection structure: To achieve a stable and detachable connection between the first extension 2 and the second extension 4, a dedicated connecting block 6 is provided, and the specific connection structure is as follows: The bottom of the first extension 2 is provided with a first groove 7 and a second groove 8 spaced apart along the front-back direction. The extension directions of the first groove 7 and the second groove 8 are both towards the second extension 4. The first groove 7 is provided with a first mounting hole (blind hole) at the end away from the second extension 4, and the second groove 8 is provided with a second mounting hole (blind hole) at the end away from the second extension 4. The blind hole structure can prevent the spring from penetrating through the hole and ensure installation stability. A first spring 9 is adapted to be installed in the first mounting hole, and a second spring 10 is adapted to be installed in the second mounting hole.

[0029] A first connector 11 is movably disposed in the first groove 7, and a second connector 12 is movably disposed in the second groove 8. The first end of the first connector 11 is sleeved on the first spring 9, and the first end is integrally formed with a first protrusion 13. One end of the first spring 9 abuts against the closed end of the first mounting hole, and the other end abuts against the first protrusion 13, providing elastic restoring force for the first connector 11. The second end of the first connector 11 is integrally formed with an outwardly protruding first hook portion 14. Similarly, the first end of the second connector 12 is sleeved on the second spring 10, and the second end is integrally formed with a second protrusion 15. The two ends of the second spring 10 abut against the closed end of the second mounting hole and the second protrusion 15, respectively. The second end of the second connector 12 is integrally formed with a second hook portion 16.

[0030] The second extension 4 is located on the side of the first extension 2. It is provided with a first protrusion 17 and a second protrusion 18 that correspond one-to-one with the first groove 7 and the second groove 8 in the front-back direction. The size of the first protrusion 17 is adapted to the first groove 7, and the size of the second protrusion 18 is adapted to the second groove 8. A first through hole is provided through the first protrusion 17, and a second through hole is provided through the second protrusion 18.

[0031] During assembly, the first protrusion 17 is fitted into the first groove 7 and is located on the side of the first protrusion 13 near the second extension 4. The second protrusion 18 is fitted into the second groove 8 and is located on the side of the second protrusion 15 near the second extension 4. At this time, the first connector 11 is pushed towards the second extension 4 under the elastic action of the first spring 9, so that the first hook 14 is engaged in the first through hole. The second connector 12 is pushed under the elastic action of the second spring 10, so that the second hook 16 is engaged in the second through hole, thus achieving the initial engagement and fixation of the first extension 2 and the second protrusion 18. Subsequently, the connecting block 6 is fitted between the bottom sides of the first extension 2 and the second extension 4, and the first protrusion 13 and the second protrusion 15 are both engaged in the corresponding slots of the connecting block 6. Then, the connection is secured with screws. Block 6 is fixedly connected to the first extension 2, further locking the position of the connector and preventing the spring from loosening the connector, ensuring the stability of the connection between the first extension 2 and the second extension 4. At the same time, when disassembling, simply unscrew the screw, remove the connector 6, and press the hook to separate the two, making the operation convenient. The present invention provides an adapter groove 19 between the first extension 2 and the second extension 4. The capacitive pen 5 is detachably connected to the adapter groove 19. Specifically, the capacitive pen 5 is magnetically connected to the adapter groove 19 or detachably connected to the adapter groove 19 through a buckle structure. When connected and used, in order to prevent slipping and prevent the capacitive pen 5 from falling, the adapter groove 19 is provided with a silicone anti-slip pad or anti-slip coating. The pen body of the capacitive pen 5 is flat or cylindrical, and the shape of the corresponding adapter groove 19 can be improved to adapt to the shape of the pen body of the capacitive pen 5.

[0032] That is, the capacitive pen 5 is detachably connected within the first extension 2 and the second extension 4. The specific storage structure is as follows: an adapter groove 19 is formed between the first extension 2 and the second extension 4. The shape of the adapter groove 19 perfectly matches the shape of the capacitive pen 5, ensuring a secure and snug fit when stored. Two detachable connection methods are available between the capacitive pen 5 and the adapter groove 19: one is a magnetic connection, where a permanent magnet is embedded in the adapter groove 19, and a magnetic element (such as a permanent magnet or ferromagnetic material) is provided at the corresponding position of the capacitive pen 5, allowing for quick assembly and disassembly through magnetic attraction; the other is a snap-fit ​​connection, where the adapter groove... The inner wall of adapter slot 19 is equipped with elastic buckles, and the corresponding position of capacitive pen 5 is equipped with a slot. During assembly, the elastic buckles are locked into the slots to secure the pen. During disassembly, pressing the elastic buckles allows the capacitive pen 5 to be removed. The inner wall of adapter slot 19 is also equipped with a silicone anti-slip pad or anti-slip coating, which can increase the friction between capacitive pen 5 and adapter slot 19, preventing the capacitive pen 5 from slipping during movement or shaking, and further improving storage stability. The pen body of capacitive pen 5 can be designed to be flat or cylindrical. The flat pen body can better fit the back of the phone, reduce the protrusion, and improve the grip. The cylindrical pen body is more in line with traditional grip habits. Users can choose according to their needs.

[0033] In practical applications, both the first housing 1 and the second housing 3 are made of metal materials, such as aluminum alloy. The surface of the metal material can also be coated with wear-resistant material to prevent wear of the invention. The metal material not only has high strength and good protective performance, but also improves the overall texture and durability of the structure.

[0034] This invention also discloses a method for using the above-mentioned hollowed-out mobile phone case capacitive stylus 5 combination structure, including the following steps: S1. Take the first housing 1 and the second housing 3, and put the first housing 1 and the second housing 3 on the two ends of the mobile phone respectively. Then, install the first spring 9 in the first mounting hole and the second spring 10 in the second mounting hole. Next, take the first connector 11 and the second connector 12, and set the first connector 11 in the first groove 7 and put the first end of the first connector 11 on the first spring 9. Then, set the second connector 12 in the second groove 8 and put the first end of the second connector 12 on the second spring 10. Next, make the first protrusion 17 fit and install the first protrusion 13 in the first groove 7 on the side near the second extension 4, and the second protrusion 18 fit and install the second protrusion 15 in the second groove 8 on the side near the second extension 4. And make the first hook 14 engage in the first through hole and the second hook 16 engage in the second through hole. S2. Take the screw and connecting block 6, insert the connecting block 6 between the bottom sides of the first extension 2 and the second extension 4, and make the first protrusion 13 and the second protrusion 15 both snap onto the connecting block 6, and then pass the screw through the connecting block 6 to connect to the first extension 2. S3. Take the capacitive pen 5 and connect it into the adapter slot 19 along the direction from the notch 20 to the first extension 2. After installation, when you need to use the capacitive pen 5, remove the capacitive pen 5 along the direction from the first extension 2 to the notch 20.

[0035] In this invention, since the first housing 1 and the second housing 3 are made of metal, if the first housing 1 and the second housing 3 were directly integrally formed, it would be very difficult to assemble the mobile phone because the first housing 1 and the second housing 3 are not easily deformed. Therefore, in this invention, the first housing 1 and the second housing 3 are set separately and connected by connecting blocks 6, etc., to facilitate the assembly and use of the mobile phone.

[0036] The present invention, by adopting the above technical solution, has the following beneficial effects: The integrated design solves the pain point of storage: the storage of the capacitive pen 5 is integrated with the protection function of the phone case. The capacitive pen 5 is securely connected to the phone case through the adapter slot 19, eliminating the need to carry it separately and completely avoiding the problems of loss, tangling and wear of the capacitive pen 5. It is also convenient to use and adapts to the needs of multiple scenarios such as commuting, studying and working.

[0037] Stable connection and easy disassembly: The first extension 2 and the second extension 4 are connected by a combination structure of "spring + connector + hook + connecting block 6", which not only ensures the connection stability of the main body of the phone case and avoids loosening and separation during use, but also allows for quick disassembly by unscrewing the screws and pressing the hook, making it easy to replace or repair.

[0038] Lightweight and heat dissipation are both achieved: the first extension 2, the second extension 4, and the area between them are all hollowed out, which greatly reduces the weight and improves the grip while ensuring structural strength; at the same time, the hollowed-out structure enhances heat dissipation on the back of the phone and prevents heat accumulation from affecting the use of the phone.

[0039] Stable storage and convenient access: The capacitive pen 5 is connected to the adapter slot 19 via a magnetic or snap-fit ​​structure, and with the help of a silicone anti-slip pad / coating, it ensures that it will not slip during movement; the notch 20 of the second shell 3 is designed to make it easy to insert and pry with your fingers, so as to quickly assemble and disassemble the capacitive pen 5.

[0040] Durable materials and strong protection: The first shell 1 and the second shell 3 are made of metal materials, which are high in strength, drop-resistant and scratch-resistant, and can effectively protect the two ends and back of the phone; the capacitive pen 5 is compatible with flat or cylindrical designs, taking into account both feel and storage fit, further improving the user experience.

[0041] This embodiment does not impose any limitation on the shape, material, structure, etc. of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A hollowed-out mobile phone case with a capacitive stylus pen assembly structure, applied to mobile phones, characterized in that... include: A first housing, one end of which is provided with a first covering area for covering and protecting the first end of the mobile phone, and the other end of which is provided with a first extension for the back side of the mobile phone. The second housing has a second covering area at one end for covering and protecting the second end of the phone. The other end of the second housing has a second extension applied to the back side of the phone. The first extension and the second extension are detachably connected. Hollow areas are provided inside the first extension, inside the second extension, and between the first extension and the second extension. And a capacitive pen, which is detachably connected within the first extension and the second extension.

2. The hollowed-out mobile phone case capacitive stylus assembly structure according to claim 1, characterized in that: It also includes a connecting block. The bottom of the first extension is provided with a first groove and a second groove at a distance from front to back. The end of the first groove away from the second extension is provided with a first mounting hole. The end of the second groove away from the second extension is provided with a second mounting hole. A first spring is provided in the first mounting hole. A second spring is provided in the second mounting hole. A first connector is provided in the first groove. A second connector is provided in the second groove. The first end of the first connector is sleeved on the first spring and the first end of the first connector is provided with a first protrusion. The second end of the first connector is provided with a first hook. The first end of the second connector is sleeved on the second spring and the first end of the second connector is provided with a second protrusion. The second end of the second connector is provided with a second hook. The second extension is provided with a first protrusion and a second protrusion at intervals on the side near the first extension. The first protrusion and the second protrusion are respectively provided with a first through hole and a second through hole. The first protrusion is adapted to be installed in the first groove on the side of the first protrusion near the second extension. The second protrusion is adapted to be installed in the second groove on the side of the second protrusion near the second extension. The first hook is engaged in the first through hole and the second hook is engaged in the second through hole. The connecting block is connected to the first extension by screws and both the first protrusion and the second protrusion are engaged in the connecting block.

3. The hollowed-out mobile phone case capacitive stylus assembly structure according to claim 2, characterized in that: An adapter slot is provided between the first extension and the second extension, and the capacitive pen is detachably connected to the adapter slot.

4. The hollowed-out mobile phone case capacitive stylus assembly structure according to claim 3, characterized in that: The capacitive pen is magnetically connected to the adapter slot.

5. The hollowed-out mobile phone case capacitive stylus assembly structure according to claim 4, characterized in that: The adapter groove is equipped with a silicone anti-slip pad or anti-slip coating.

6. The hollowed-out mobile phone case capacitive stylus assembly structure according to claim 5, characterized in that: The pen body of the capacitive pen is flat or cylindrical.

7. The hollowed-out mobile phone case capacitive stylus assembly structure according to claim 6, characterized in that: Both the first and second housings are made of metal.

8. The hollowed-out mobile phone case capacitive stylus assembly structure according to claim 7, characterized in that: The second housing has a notch in the middle of the bottom side at the end away from the first housing.

9. The method of using the hollowed-out mobile phone case capacitive stylus combination structure according to claim 8, characterized in that: Includes the following steps: S1. Take the first housing and the second housing, and fit the first housing and the second housing onto the two ends of the mobile phone respectively. Then, install the first spring into the first mounting hole and the second spring into the second mounting hole. Next, take the first connector and the second connector, and set the first connector in the first groove and fit the first end of the first connector onto the first spring. Then, set the second connector in the second groove and fit the first end of the second connector onto the second spring. Next, fit the first protrusion into the first groove on the side of the first protrusion near the second extension, fit the second protrusion into the second groove on the side of the second protrusion near the second extension, and fit the first hook into the first through hole and the second hook into the second through hole. S2. Take the screw and the connecting block, insert the connecting block between the bottom sides of the first extension and the second extension so that the first protrusion and the second protrusion are both engaged on the connecting block, and then pass the screw through the connecting block to connect to the first extension. S3. Take the capacitive pen and connect it into the adapter slot along the direction from the notch to the first extension. After installation, when you need to use the capacitive pen, remove it along the direction from the first extension to the notch.

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