Protective plug for USB interface

Abstract

The utility model discloses a protective plug for a USB interface, and relates to the technical field of protective plugs, the protective plug comprises a plug body inserted in a cavity of the USB interface and a plug cap located at the end of the plug body, the wall of the cavity is provided with a slotted hole, the plug body is provided with a clamping hook clamped with the slotted hole, and the plug cap is provided with a clamping groove. The hook-shaped part of the clamping hook is at least clamped with the hole wall of the groove hole in the pulling-out direction of the plug body, the plug cap is attached to the end face of the USB interface or attached to the end face of a shell containing the USB interface, the thickness of the plug cap is gradually increased in the direction from the outer edge of the plug cap to the middle, and therefore a conical surface is formed on the side, away from the plug body, of the plug cap. According to the utility model, the requirement of forbidding the USB interface can be effectively met, and the USB interface is prevented from being forcibly pulled out

Description

Technical Field

[0001] This utility model relates to the field of protective plug technology, and in particular to a protective plug for a USB interface. Background Technology

[0002] For electronic products with USB ports, such as desktop computers and laptops, protective plugs are usually used to seal the USB ports. However, this method cannot securely lock the USB ports in place. Some users can forcibly pull out the protective plugs, and the USB ports can still be used after being pulled out, so it cannot achieve a good disabling effect.

[0003] It is evident that how to prevent the protective plug from being forcibly pulled out is a problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a protective plug for a USB interface, which can effectively meet the requirement of disabling the USB interface and prevent it from being forcibly unplugged.

[0005] To solve the above-mentioned technical problems, this utility model provides a protective plug for a USB interface, including a plug body inserted into the cavity of the USB interface and a plug cap located at the end of the plug body. The cavity wall has a slot, and the plug body is provided with a hook that engages with the slot. The hook-shaped part of the hook engages with the wall of the slot at least in the pull-out direction of the plug body. The plug cap is fitted with the end face of the USB interface or the end face of the housing that accommodates the USB interface. The thickness of the plug cap gradually increases in the direction from its outer edge toward the center, so as to form a conical surface on the side of the plug cap away from the plug body.

[0006] In some embodiments, the plug includes an outer wall that abuts against the inner cavity surface of the cavity wall, the outer wall enclosing a receiving space for accommodating an interface board for accommodating the USB interface.

[0007] In some embodiments, a first clearance groove is provided on the two opposite outer walls, and a spring is provided in the first clearance groove. One end of the spring is connected to the groove wall of the first clearance groove, and the two sides of the spring are spaced apart from the groove wall of the first clearance groove.

[0008] In some embodiments, the hook is disposed at the other end of the spring piece, and the hook-shaped portion of the hook extends beyond the wall surface of the outer wall where the first clearance groove is located.

[0009] In some embodiments, a second clearance groove is provided on the other two opposite outer walls, and the second clearance groove and the first clearance groove are used to avoid the elastic pressure plate on the cavity wall.

[0010] In some embodiments, the plug further includes a base fixedly connected to the plug cap, the outer edge of the base extending away from the plug cap to form the outer wall having the receiving space;

[0011] The outer wall includes two long outer walls and two short outer walls. The long outer walls are perpendicular to the short outer walls. The accommodating space is provided with a partition that is fixedly connected to the base. The partition is parallel to the two long outer walls and forms a clamping space with one of the long outer walls for clamping the interface plate.

[0012] A plastic film is provided on the base corresponding to the clamping space. The plastic film is filled with adhesive and protrudes from the base after being filled with adhesive. The interface plate is squeezed against the plastic film in the clamping space and the plastic film is broken to allow the adhesive to overflow onto the base and the partition. The adhesive cures in the air to fix the interface plate to the base and / or the partition.

[0013] The hooks are disposed on the two short outer walls. There is a first gap between the hooks and the interface plate inserted in the clamping space, and a second gap between the hooks and the partition. The size of the first gap and the second gap satisfies the maximum compressive displacement generated by the hooks when they enter the slot.

[0014] In some embodiments, the inner wall surfaces of one of the long outer walls and the two short outer walls have inner contours that are adapted to the outer contour of one side of the interface plate, so that the position of the interface plate in the clamping space is relatively fixed, and the first gap and the second gap have a fixed spacing.

[0015] In some embodiments, the hook-shaped portion of the latch has an arc surface or a slope on its outer side, and the arc surface or the slope is pressed against the cavity wall to generate an inward compressive force on the hook-shaped portion of the latch.

[0016] In some embodiments, the outer edge of the cap extends beyond the plug body, and an adhesive layer is provided on the end face of the cap extending beyond the plug body, the other side of which is adhered to the housing.

[0017] In some embodiments, the cap has a planar portion in the middle of the side opposite to the cap body, and the conical surface is located around the planar portion.

[0018] As can be seen from the above technical solution, the beneficial effect of this utility model is that the hook on the plug body hooks into the slot on the cavity wall of the USB interface, and the hook-shaped part of the hook can engage with the slot at least in the pull-out direction of the plug body, thereby preventing the protective plug from being pulled out by the cooperation of the hook and the slot; at the same time, the plug cap can fit against the end face of the USB interface or the end face of the housing that houses the USB interface, so that there is no gap between the plug cap and the USB interface, or between the plug cap and the housing, preventing the protective plug from being pried open or damaged by external force with tools. In addition, the thickness of the plug cap gradually increases in the direction from its outer edge towards the center, so as to form a conical surface on the side of the plug cap away from the plug body, so that fingers or tools cannot apply a pull-out force to the plug cap, further preventing the protective plug from being pulled out. Attached Figure Description

[0019] To more clearly illustrate the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the assembly structure of the protective plug, shell, and USB interface provided in this embodiment of the utility model;

[0021] Figure 2 A schematic diagram of the assembly structure of the protective plug and the USB interface provided in this embodiment of the utility model;

[0022] Figure 3 A schematic diagram of the protective plug structure for a USB interface provided in this embodiment of the utility model;

[0023] Figure 4 A schematic diagram of the front structure of the protective plug for the USB interface provided in this embodiment of the utility model;

[0024] Figure 5 for Figure 4 AA section view;

[0025] Figure 6 A schematic diagram of the structure of the protective plug and the interface board of the USB interface provided in this embodiment of the utility model.

[0026] In the picture:

[0027] 1-House; 2-USB port; 3-Protective plug;

[0028] 21-Cavity wall; 22-Slot; 23-Elastic pressure plate; 24-Interface plate;

[0029] 31-Plug cap; 32-Plug body;

[0030] 311 - Conical surface; 312 - Planar portion; 313 - Adhesive layer;

[0031] 321-Hook; 322-Spring; 323-Outer wall; 324-First clearance groove; 325-Second clearance groove; 326-Accommodation space; 327-Partition; 328-Plastic film; 329-Base;

[0032] 3231 - Long outer wall; 3232 - Short outer wall. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] The terms "comprising" and "having," and any variations thereof, in the specification and accompanying drawings of this utility model are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may include steps or units not listed.

[0035] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Next, a detailed description of a protective plug for a USB interface provided in this embodiment of the present invention will be provided. The protective plug 3 includes a plug body 32 and a plug cap 31. The plug body 32 can be inserted into the cavity of the USB interface 2, while the plug cap 31 is located at the end of the plug body 32 and is entirely located outside the cavity of the USB interface 2. Typically, the USB interface 2 has a cavity with metal walls 21 surrounding it. Slots 22 are formed in the walls 21, and elastic pressure plates 23 are provided at the positions of the slots 22. Please refer to... Figure 2 The elastic pressure plate 23 can cooperate with the USB plug inserted into the cavity of the USB interface 2 to maintain the tightness of the USB plug to a certain extent and prevent accidental dislodgement. The protective plug 3 in this embodiment utilizes the slot 22 of the USB interface 2 so that when the plug body 32 is inserted into the USB interface 2 and is fully inserted, the hook-shaped part of the hook 321 can engage with the wall of the slot 22. This allows the hook 321 to engage with the wall of the slot 22 in the direction in which the plug body 32 is pulled out, that is, the hook 321 can hook onto the wall of the slot 22 and prevent the plug body 32 from being pulled out by external force.

[0037] It should be noted that, in the design of the USB interface 2, there is a certain gap between the elastic pressure plate 23 and the hole wall of the slot 22, which will not hinder the elastic pressing performance of the elastic pressure plate 23. Therefore, when the hook 321 of this embodiment is engaged with the hole wall of the slot 22, the hook-shaped part of the hook 321 can be engaged through the gap between the elastic pressure plate 23 and the hole wall of the slot 22.

[0038] In one embodiment, the USB interface 2 is entirely embedded within the housing 1, with the end of the USB interface 2 lower than the outer surface of the housing 1. Please refer to [reference needed]. Figure 1 , Figure 1 This is a schematic diagram of the assembly structure of the protective plug 3, the housing 1, and the USB interface 2 provided in this embodiment of the utility model. The housing 1 can be the host shell of a desktop computer or the shell of a laptop computer, etc. There is a certain height difference between the end of the USB interface 2 and the outer surface of the housing 1. At this time, after the plug 32 is inserted into the cavity of the USB interface 2, the plug cap 31 can fit against the end face of the housing 1, so that there is no gap between the plug cap 31 and the housing 1, avoiding the use of human hands or other tools to pry open or damage the protective plug 3 by inserting them into the gap between the plug cap 31 and the housing 1.

[0039] In another embodiment, although the USB interface 2 is entirely embedded within the housing 1, the end of the USB interface 2 is flush with or higher than the outer surface of the housing 1. In this case, the end face of the plug 31 can fit against the end face of the USB interface 2, thus eliminating any gap between the plug 31 and the USB interface 2 and preventing the use of tools to pry open or damage the protective plug 3. It should be noted that when the end of the USB interface 2 is flush with the outer surface of the housing 1, the end face of the plug 31 can not only fit against the end face of the USB interface 2, but also, if the plug 31 is large enough, fit against the outer surface of the housing 1.

[0040] Furthermore, since the plug cap 31 is located entirely outside the USB interface 2, and considering that it can also be pinched or clamped by hand or other tools with clamping function, the thickness of the plug cap 31 in this embodiment gradually increases from its outer edge towards the center, so as to form a conical surface 311 on the side of the plug cap 31 away from the plug body 32. Please refer to [reference needed]. Figure 3 Since the outer edges of the cap 31 are lower than the center, a smooth or flat conical surface 311 can be formed around the cap 31. There is no stable point of force for a person's hand or a tool with a clamping function at this point, so it is impossible to pinch or clamp the cap 31, thus preventing the protective plug 3 from being forcibly pulled out by pulling the cap 31.

[0041] It should be noted that, based on the conical surface 311 of the cap 31, the thickness of the outer edge of the cap 31 should not be too large. The thickness of the outer edge can be between 1-3mm to prevent human hands or tools with clamping function from pinching or clamping the outer edge of the cap 31. Of course, the outer edge of the cap 31 can also be set as an arc-shaped structure or a chamfered structure that smoothly transitions with the conical surface 311, which can further prevent pinching or clamping the outer edge of the cap 31.

[0042] In summary, this embodiment utilizes the hook 321 on the plug body 32 to engage with the slot 22 on the cavity wall 21 of the USB interface 2. The hook-shaped portion of the hook 321 can engage with the slot 22 at least in the pull-out direction of the plug body 32, thus preventing the protective plug 3 from being pulled out. Simultaneously, the plug cap 31 can fit against the end face of the USB interface 2 or the end face of the housing 1 that houses the USB interface 2, eliminating gaps between the plug cap 31 and the USB interface 2, or between the plug cap 31 and the housing 1, preventing the protective plug 3 from being pried open or damaged by external force using tools. Furthermore, the plug cap 31 gradually increases in thickness from its outer edge towards the center, forming a conical surface 311 on the side of the plug cap 31 facing away from the plug body 32, preventing fingers or tools from applying pull-out force to the plug cap 31, further preventing the protective plug 3 from being pulled out.

[0043] Considering the stability of the protective plug 3 after insertion into the USB interface 2, the plug body 32 in this embodiment includes an outer wall 323 that abuts against the inner cavity surface of the cavity wall 21. After the protective plug 3 is inserted into the cavity of the USB interface 2, the outer wall 323 can stably abut against the inner cavity surface of the cavity. It should be noted that in practical applications, due to the influence of factors such as machining accuracy and assembly errors, there should be a certain amount of clearance between the outer wall 323 and the cavity wall 21 to prevent situations such as the plug body 32 being unable to be inserted into the cavity of the USB interface 2, or being difficult to insert.

[0044] Currently, the USB interface 2 is usually equipped with an interface board 24, which enables signal connection with the USB plug. Therefore, when the plug 32 is inserted into the USB interface 2, it should be considered that the plug 32 should not interfere with the interface board 24 to avoid the protective plug 3 being unable to be inserted smoothly or not being able to be inserted in place. In this embodiment, an accommodating space 326 for accommodating the interface board 24 can be formed by the outer wall 323. When the protective plug 3 is inserted into the USB interface 2, the interface board 24 can be inserted into the accommodating space 326 accordingly.

[0045] Furthermore, due to the presence of the elastic pressure plate 23, to prevent interference between the outer wall 323 and the elastic pressure plate 23 when the plug 32 is inserted into the USB interface 2, thus preventing the plug 32 from being inserted smoothly, multiple clearance grooves can be formed on the outer wall 323. Specifically, a first clearance groove 324 is formed on two opposite outer walls 323, and a second clearance groove 325 is formed on the other two opposite outer walls 323. Please refer to [reference needed]. Figure 3 The presence of the clearance groove allows the plug 32 to be inserted into the cavity of the USB interface 2 more smoothly.

[0046] It should be noted that, while meeting the width requirement of the elastic pressure plate 23, the width of the clearance groove should not be too large, ensuring that the outer wall 323 has sufficient wall surface to abut against the inner wall surface of the cavity wall 21. Generally speaking, the cavity of the USB interface 2 is a cuboid structure, and the outer contour of the corresponding outer wall 323 should also be a cuboid structure that matches the inner contour of the cavity. Therefore, there are two opposing outer walls 323.

[0047] In addition, a spring piece 322 is provided in the first clearance groove 324. As the name suggests, the spring piece 322 has a certain elastic deformation property. One end of the spring piece 322 is connected to the groove wall of the first clearance groove 324. Please refer to... Figure 3 The two sides of the spring piece 322 are spaced apart from the groove wall of the first relief groove 324, so that the spring piece 322 will produce a certain elastic deformation when it is subjected to external pressure. The buckle in this embodiment is provided at the other end of the spring piece 322, the hook-shaped part of the hook 321 faces outward, and the hook-shaped part of the hook 321 extends beyond the wall surface of the outer wall 323 where the first relief groove 324 is located.

[0048] Specifically, after the protective plug 3 is inserted into place, the hook 321 needs to engage with the slot 22 on the cavity wall 21. Therefore, when the hook-shaped part of the hook 321 reaches the position of the slot 22, the hook-shaped part of the hook 321 needs to extend beyond the wall surface of the outer wall 323 and into the slot 22 in order to achieve the engagement between the hook-shaped part and the wall of the slot 22.

[0049] It should be noted that the end face of the spring piece 322 should be flush with or lower than the wall surface of the corresponding outer wall 323 to prevent the root of the spring piece 322 from being squeezed against the inner cavity surface of the cavity wall 21, which would affect the smooth insertion of the plug body 32.

[0050] In some embodiments, the plug 32 further includes a base 329, please refer to Figure 5The base 329 is fixedly connected to the plug 31, which can be a one-piece connection. The outer edge of the base 329 extends away from the plug 31, thereby forming an outer wall 323 with a receiving space 326. It is foreseeable that the outer wall 323 is an extension of the base 329. The outer wall 323 and the base 329 can also be a one-piece structure. The outer wall 323 extends based on the outer edge of the base 329. Therefore, the wall surface of the outer wall 323 and the outer surface of the base 329 can be coplanar. That is, the base 329 and the outer wall 323 form a smooth wall structure, which is conducive to the plug 32 being smoothly inserted into the USB interface 2. At the same time, it is conducive to the base 329 and the outer wall 323 abutting against the cavity wall 21 together, improving the stability of the protective plug 3 after insertion.

[0051] Further, please refer to Figure 6 As mentioned above, the outer contour of the outer wall 323 is a cuboid structure, and combined with its internal accommodating space 326, the outer wall 323 has two opposing long outer walls 3231 and two opposing short outer walls 3232, with the long outer walls 3231 and short outer walls 3232 arranged perpendicularly. Of course, a transition arc surface can be provided at the transition point between the long outer walls 3231 and the short outer walls 3232 to reduce the possibility of interference between the transition point and the cavity of the USB interface 2.

[0052] Since the interface board 24 of the USB interface 2 is usually eccentrically positioned, after the interface board 24 enters the receiving space 326, if the receiving space 326 is large enough, some unused space will be reserved. A partition 327 can be installed in this space. The partition 327 is fixedly connected to the base 329. The partition 327 can cooperate with one of the long outer walls 3231 to form a clamping space for holding the interface board 24. It should be noted that the partition 327 has a certain length and can be set parallel to the long outer wall 3231.

[0053] Based on this, the clamping space formed between the partition 327 and the long outer wall 3231 can limit the interface plate 24 to a certain extent, and can also improve the assembly accuracy of the protective plug 3, further improving the assembly stability of the protective plug 3. Of course, there should also be a certain amount of allowance between the partition 327 and the interface plate 24, and between the long outer wall 3231 and the interface plate 24, to avoid the situation where the interface plate 24 cannot enter the clamping space.

[0054] Please refer to Figure 4 and Figure 5A plastic film 328 is provided on the base 329 corresponding to the clamping space. The plastic film 328 is usually a soft plastic film with poor pressure resistance, such as PE plastic film 328 (low-density polyethylene film) or PVC (polyvinyl chloride) plastic film 328. The plastic film 328 is filled with liquid adhesive, and after the adhesive is filled, the plastic film 328 can protrude from the base 329. When the protective plug 3 is inserted into place, the interface plate 24 can extend into the clamping space to the contact position with the base 329, thereby squeezing the plastic film 328 protruding from the base 329. When the plastic film 328 is squeezed, the pressure generated by the liquid adhesive inside it will cause the plastic film 328 to break, thereby causing the liquid adhesive to overflow and flow onto the base 329 and the partition 327 during the overflow process. The adhesive cures in the air, fixing the interface plate 24 to the base 329 and / or the partition 327. The adhesive can be instant glue, 401 glue, cyanoacrylate glue, etc., which will not be described in detail here, but all fall within the protection scope of this utility model.

[0055] In addition, to prevent the adhesive from overflowing to other places besides the base 329 and partition 327, such as onto the spring 322, which may cause the elasticity of the spring 322 to deteriorate, a certain thickness of sponge can be provided at the edge of the base 329 or partition 327. The sponge will not affect the smooth insertion of the interface plate 24 into the clamping space, and can also prevent the adhesive from overflowing excessively.

[0056] Two hooks 321 are set on the two short outer walls 3232. Please refer to [reference needed]. Figure 6 There is a first gap between the hook 321 and the interface plate 24 inserted into the clamping space, and a second gap between the hook 321 and the partition 327. The size of the first gap and the second gap is sufficient to satisfy the maximum compression displacement generated by the hook 321 when it enters the slot 22. It should be noted that since the hook-shaped part of the hook 321 protrudes from the wall surface of the short outer wall 3232, the hook-shaped part will be squeezed by the cavity wall 21 during the insertion of the plug 32 into the cavity, thereby generating an inward compression displacement. At the same time, due to the presence of the interface plate 24 and the partition 327, in order to avoid the interface plate 24 and the partition 327 interfering with the inward compression displacement of the hook-shaped part, it is necessary to ensure that the first gap and the second gap are large enough. However, considering that the cavity space of the USB interface 2 is limited, the first gap and the second gap should not be too large, just enough to satisfy the above conditions, which will not be elaborated here.

[0057] Furthermore, the adhesive allows the interface board 24 to be fixedly connected to the base 329, and also to the partition 327, further improving the anti-pull-out performance of the protective plug 3. On this basis, when the adhesive overflows onto the partition 327, the adhesive on the partition 327 may come into contact with the metal piece (used for signal transmission) on the interface board 24, thereby allowing the metal piece to also be fixedly connected to the partition 327. Therefore, under the action of the adhesive, if the protective plug 3 is forcibly pulled out by external force, the metal piece can be damaged, causing the metal piece to lose its signal transmission function, thus preventing personnel from using the USB interface 2 to leak information.

[0058] In some embodiments, the inner wall surfaces of one long outer wall 3231 and two short outer walls 3232 have inner contours that adapt to the outer contour of one side of the interface plate 24. Please refer to... Figure 6 The above indicates that the clamping space is used to clamp the interface plate 24, so that the position of the interface plate 24 in the clamping space can be relatively fixed, thereby forming a first gap and a second gap with a fixed distance, so that the two hooks 321 are not affected by the interface plate 24 and the partition 327.

[0059] In addition, the hook-shaped part of the hook 321 has an arc surface or a slope on the outside, and the arc surface or slope is pressed against the cavity wall 21 so that the hook-shaped part of the hook 321 generates an inward compressive force. When using the protective plug 3, it is inserted into the corresponding USB interface 2. During the insertion process, the outer wall 323 on the plug body 32 can first be inserted into the cavity along the cavity wall 21 of the USB interface 2. After being inserted to a certain depth, the arc or inclined surface of the hook-shaped part can be squeezed against the end of the cavity wall 21, thereby compressing the hook-shaped part inward. As the protective plug 3 is continuously inserted, the hook-shaped part can smoothly enter the cavity. As the protective plug 3 is further inserted, the interface plate 24 can be inserted into the clamping space between the partition 327 and the long outer wall 3231. After being inserted into place, the hook-shaped part of the hook 321 reaches the position of the slot 22. Using the elastic properties of the spring piece 322, the hook 321 is driven to engage with the slot 22. At the same time, the interface plate 24 can break the plastic film 328, causing the adhesive to overflow onto the base 329 and the partition 327. After a certain period of time, the adhesive cures and fixes the interface plate 24 and the base 329, and the interface plate 24 and the partition 327.

[0060] Please refer to Figure 4The outer edge of the plug cap 31 extends beyond the plug body 32, and an adhesive layer 313 is provided on the end face of the plug cap 31 that extends beyond the plug body 32. One side of the adhesive layer 313 is connected to the plug body 32, and the adhesive layer 313 can be arranged in a ring shape. The other side of the adhesive layer 313 can be adhered to the housing 1, thereby further improving the anti-tampering effect of the protective plug 3 after it is inserted into the USB interface 2. At the same time, the ring-shaped adhesive layer 313 can also prevent dust from entering the USB interface 2 from the gap between the plug cap 31 and the housing 1, thus playing a certain role in dust prevention. Of course, if the end of the USB interface 2 is flush with or higher than the outer surface of the housing 1, the adhesive layer 313 can be directly adhered to the end of the USB interface 2, which can also achieve the above-mentioned function, and will not be elaborated here.

[0061] Please refer to Figure 3 The cap 31 has a flat portion 312 in the middle of the side away from the cap body 32, and a conical surface 311 is located around the flat portion 312. The flat portion 312 can be used to attach a sticker with a warning function, such as a red sticker or a sticker with anti-tamper / anti-pull function, so as to visually warn people not to pull out the protective cap 3.

[0062] The protective plug 3 of this embodiment has a clever structure, is stable and reliable, and is easy to use, which can well meet customer needs and effectively improve customer satisfaction. The protective plug 3 of this embodiment is applicable to all USB ports, such as those in servers, laptops, and desktops, offering wide application, reliability, ease of use, and high value. Furthermore, the protective plug 3 of this embodiment can be extended to scenarios where I / O (input / output) interfaces of servers, laptops, and desktops need to be disabled, such as Type-C, DP, and HDMI interfaces. The hook 321 and the conical surface 311 can be used to meet the need to disable the interface and prevent it from being forcibly pulled out.

[0063] Considering the protective plug's ability to resist pull-out and damage, the protective plug as a whole needs to have a certain degree of rigidity, and high-density polyethylene (HDPE), polystyrene (PS), and polycarbonate (PC) can be used as the main materials.

[0064] The above provides a detailed description of a protective plug for a USB interface according to embodiments of the present invention. The various embodiments are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0065] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A protective plug for a USB interface, characterized in that, The device includes a plug (32) inserted into the cavity of the USB interface (2) and a plug cap (31) located at the end of the plug (32). The cavity wall (21) of the cavity has a slot (22). The plug (32) is provided with a hook (321) that engages with the slot (22). The hook-shaped part of the hook (321) engages with the wall of the slot (22) at least in the pull-out direction of the plug (32). The plug cap (31) is attached to the end face of the USB interface (2) or to the end face of the housing (1) that accommodates the USB interface (2). The thickness of the plug cap (31) gradually increases in the direction from its outer edge toward the center to form a conical surface (311) on the side of the plug cap (31) away from the plug (32).

2. The protective plug for a USB interface according to claim 1, characterized in that, The plug (32) includes an outer wall (323) that abuts against the inner cavity surface of the cavity wall (21), and the outer wall (323) encloses a receiving space (326) for accommodating the interface board (24) for accommodating the USB interface (2).

3. The protective plug for a USB interface according to claim 2, characterized in that, A first clearance groove (324) is provided on the two opposite outer walls (323). A spring piece (322) is provided in the first clearance groove (324). One end of the spring piece (322) is connected to the groove wall of the first clearance groove (324), and the two sides of the spring piece (322) are spaced apart from the groove wall of the first clearance groove (324).

4. The protective plug for a USB interface according to claim 3, characterized in that, The hook (321) is located at the other end of the spring piece (322), and the hook-shaped part of the hook (321) extends beyond the wall surface of the outer wall (323) where the first clearance groove (324) is located.

5. The protective plug for a USB interface according to claim 3, characterized in that, The other two outer walls (323) are provided with second clearance grooves (325), and the second clearance grooves (325) and the first clearance grooves (324) are used to avoid the elastic pressure plate (23) on the cavity wall (21).

6. The protective plug for a USB interface according to claim 2, characterized in that, The plug (32) also includes a base (329) which is fixedly connected to the plug cap (31), and the outer edge of the base (329) extends away from the plug cap (31) to form the outer wall (323) having the receiving space (326). The outer wall (323) includes two long outer walls (3231) and two short outer walls (3232). The long outer walls (3231) are perpendicular to the short outer walls (3232). The accommodating space (326) is provided with a partition (327) fixedly connected to the base (329). The partition (327) is parallel to the two long outer walls (3231) and forms a clamping space with one of the long outer walls (3231) for clamping the interface plate (24). A plastic film (328) is provided on the base (329) corresponding to the clamping space. The plastic film (328) is filled with adhesive and the plastic film (328) protrudes from the base (329) after being filled with adhesive. The interface plate (24) is squeezed against the plastic film (328) in the clamping space and breaks the plastic film (328) to make the adhesive overflow onto the base (329) and the partition (327). The adhesive cures in the air to fix the interface plate (24) to the base (329) and / or the partition (327). The hook (321) is disposed on the two short outer walls (3232). There is a first gap between the hook (321) and the interface plate (24) inserted in the clamping space, and there is a second gap between the hook (321) and the partition (327). The size of the first gap and the second gap satisfies the maximum compression displacement generated by the hook (321) when it enters the slot (22).

7. The protective plug for a USB interface according to claim 6, characterized in that, The inner wall surfaces of one of the long outer walls (3231) and the two short outer walls (3232) have an inner contour that is adapted to the outer contour of one side of the interface plate (24) so ​​that the position of the interface plate (24) in the clamping space is relatively fixed, and the first gap and the second gap have a fixed spacing.

8. The protective plug for a USB interface according to claim 1, characterized in that, The hook (321) has an arc or slope on the outside of its hook-shaped part. The arc or slope is pressed against the cavity wall (21) so that the hook-shaped part of the hook (321) generates an inward compressive force.

9. The protective plug for a USB interface according to claim 1, characterized in that, The outer edge of the cap (31) extends beyond the plug body (32), and an adhesive layer (313) is provided on the end face of the cap (31) extending beyond the plug body (32), and the other side of the adhesive layer (313) is adhered to the shell (1).

10. The protective plug for a USB interface according to claim 1, characterized in that, The cap (31) has a flat portion (312) in the middle of the side away from the plug body (32), and the conical surface (311) is located around the flat portion (312).

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