Electronic device

Abstract

The utility model relates to the technical field of electronic equipment, in particular to electronic equipment. The electronic equipment comprises a middle frame, wherein a key hole is formed in the middle frame; the elastic sleeve is located in the key hole and is in interference fit with the key hole, and an annular convex part extending in the circumferential direction of the elastic sleeve is formed on the inner wall of the elastic sleeve; and the key module comprises a key cap and a key rod which are connected with each other, the key cap is used for being pressed by a user, the key rod is arranged in the annular convex part in a penetrating manner, and the key rod is in sliding sealing fit with the annular convex part. Sealing between the key rod and the key hole can be achieved through the elastic sleeve, the elastic sleeve can be formed on a large scale, namely, the production period of the elastic sleeve is short, a large number of products can be rapidly and continuously produced, the production cost of unit products is reduced, and obviously, compared with single-time forming of liquid silica gel, the production efficiency is improved. By adopting the elastic sleeve, the manufacturing cost of the electronic equipment can be reduced.

Description

Technical Field

[0001] This application relates to the field of electronic equipment technology, and more particularly to an electronic device. Background Technology

[0002] To ensure the aesthetics and ease of use of smartphones, some function buttons, such as the power button and volume control buttons, are installed on the mid-frame. The mid-frame contains an FPC (Flexible Printed Circuit) board, which has trigger switches. These trigger switches correspond to the buttons on the mid-frame. When a user presses a button, the button triggers the trigger switch to perform the corresponding function.

[0003] Currently, the function buttons are slidably mounted in button holes on the middle frame. A sealing ring is formed on the function button using liquid silicone injection molding. This sealing ring seals the gap between the button hole and the function button, achieving waterproofing. However, forming the sealing ring using liquid silicone injection molding is relatively expensive. Utility Model Content

[0004] This application discloses an electronic device that can reduce the manufacturing cost of electronic devices.

[0005] To achieve the above objectives, embodiments of this application disclose an electronic device, including:

[0006] A middle frame, on which button holes are provided;

[0007] An elastic sleeve is located inside the key hole and is interference-fitted with the key hole. The inner wall of the elastic sleeve has an annular protrusion extending circumferentially along the elastic sleeve.

[0008] A button module includes a button cap and a button lever connected to each other. The button cap is for users to press, and the button lever passes through the annular protrusion. The button lever and the annular protrusion are slidably sealed together to press or release the trigger switch of the electronic device.

[0009] In one alternative embodiment, the annular protrusion has a cylindrical surface that contacts the button lever surface; and / or,

[0010] The contact area between the annular protrusion and the button rod is the first area, and the contact area between the elastic sleeve and the button hole is the second area. The ratio of the first area to the second area is 1 / 5 to 1 / 3.

[0011] In one optional embodiment, the coefficient of friction between the elastic sleeve and the middle frame is greater than the coefficient of friction between the button lever and the elastic sleeve; and / or,

[0012] The button lever is made of polyoxymethylene material.

[0013] In one optional embodiment, the button cap and the button lever are separately disposed, and the end of the button lever opposite to the button cap is provided with a limiting protrusion. The limiting protrusion is integrally formed with the button lever, and the limiting protrusion is in a limiting engagement with the elastic sleeve and / or the inner wall of the middle frame in a first direction, wherein the first direction is the direction from the button lever to the button cap.

[0014] In one alternative embodiment, the limiting protrusion can be positioned in the first direction to engage with the end face of the elastic sleeve opposite to the button cap.

[0015] In one optional embodiment, the end face of the limiting protrusion facing away from the button cap is coplanar with the end face of the button lever facing away from the button cap.

[0016] In one optional embodiment, the button cap has a receiving groove on the end face facing the button rod, a portion of the button rod is located in the receiving groove, and the button rod is connected to the inner wall of the receiving groove through a colloid layer.

[0017] In one optional embodiment, the receiving groove includes a first groove and a second groove arranged sequentially and connected along the first direction. The volume of the first groove is greater than the volume of the second groove. The cross-sectional area of ​​the first groove gradually decreases along the first direction, and the minimum cross-sectional area of ​​the first groove is equal to the cross-sectional area of ​​the second groove.

[0018] In one optional embodiment, the electronic device further includes a circuit board disposed within the middle frame, and a trigger switch is provided on the circuit board, the trigger switch being configured corresponding to the button lever;

[0019] The trigger switch is elastic, and after being pressed, the trigger switch can apply a restoring force to the button rod in a first direction, the first direction being the direction from the button rod to the button cap.

[0020] In one optional embodiment, the button hole includes a first hole segment and a second hole segment distributed sequentially along a first direction, the cross-sectional area of ​​the first hole segment is smaller than the cross-sectional area of ​​the second hole segment, the elastic sleeve is interference-fitted with the first hole segment, and the first direction is the direction from the button rod to the button cap;

[0021] The button cap includes a first part and a second part that are sequentially distributed and connected along the first direction. Along the radial direction of the elastic sleeve, the outer peripheral surface of the second part extends beyond the outer peripheral surface of the first part.

[0022] When the button lever releases the trigger switch, at least a portion of the second part is located within the second hole segment.

[0023] Compared with related technologies, the beneficial effects of this application are:

[0024] In this application, a button hole is provided on the middle frame, and an elastic sleeve is provided inside the button hole. The elastic sleeve and the button hole are interference-fitted to achieve a seal between the elastic sleeve and the button hole. Furthermore, the inner wall of the elastic sleeve has an annular protrusion extending circumferentially along the elastic sleeve. The button rod of the button module slides and seals with the annular protrusion to achieve a seal between the elastic sleeve and the button rod. It is evident that this application can achieve a seal between the button rod and the button hole using an elastic sleeve. Moreover, the elastic sleeve can be mass-produced, meaning its production cycle is short, allowing for rapid and continuous production of large quantities of products, reducing the unit production cost. Clearly, compared to the one-time molding of liquid silicone, this application's use of an elastic sleeve can reduce the manufacturing cost of electronic devices.

[0025] Furthermore, since the elastic sleeve of this application has an annular protrusion inside, the diameter and axial extension length of the annular protrusion are smaller than the diameter and axial extension length of the elastic sleeve. Therefore, the contact area between the button rod and the annular protrusion is smaller, the annular protrusion obstructs the button rod less, and the user presses the button module with less effort. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is an exploded view of a portion of the structure of the electronic device disclosed in an embodiment of this application;

[0028] Figure 2 This is a side view of a portion of the structure of the electronic device disclosed in the embodiments of this application;

[0029] Figure 3 This is a top view of a portion of the structure of the electronic device disclosed in the embodiments of this application;

[0030] Figure 4 For this application Figure 3 The structure shown is a cross-sectional view at section XX;

[0031] Figure 5 For this application Figure 4 Enlarged diagram of point A in the middle.

[0032] Explanation of reference numerals in the attached figures:

[0033] 100, Middle frame; 110, Button hole; 111, First hole segment; 112, Second hole segment; 200, Elastic sleeve; 210, Annular protrusion; 300, Button module; 301, First groove; 302, Second groove; 310, Button cap; 311, Receiving groove; 312, First part; 313, Second part; 320, Button lever; 321, Limiting protrusion; 400, Glue layer; 500, Circuit board; 510, Trigger switch. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0036] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0037] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0038] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0039] To ensure the aesthetics and ease of use of smartphones, some function buttons, such as the power button and volume control buttons, are installed on the mid-frame. The mid-frame contains an FPC (Flexible Printed Circuit) board, which has trigger switches. These trigger switches correspond to the buttons on the mid-frame. When a user presses a button, the button triggers the trigger switch to perform the corresponding function.

[0040] Currently, the function buttons are slidably mounted in button holes on the middle frame. A sealing ring is formed on the function button using liquid silicone injection molding. This sealing ring seals the gap between the button hole and the function button, achieving waterproofing. However, forming the sealing ring using liquid silicone injection molding is relatively expensive.

[0041] This application discloses an electronic device that can reduce the manufacturing cost of electronic devices. The electronic device provided in this application will be described in detail below with reference to the accompanying drawings and specific embodiments and application scenarios.

[0042] like Figures 1 to 5 As shown in the illustration, this application discloses an electronic device. Exemplary examples include mobile phones, tablets, e-book readers, etc. This application does not limit the types of electronic devices, including:

[0043] The middle frame 100 has a button hole 110. For example, the button hole 110 extends from the inner peripheral wall of the middle frame 100 to the outer peripheral wall of the middle frame 100.

[0044] An elastic sleeve 200 is located within the keyhole 110 and is interference-fitted with it. The inner wall of the elastic sleeve 200 has an annular protrusion 210 extending circumferentially along the sleeve. For example, the elastic sleeve 200 can be mass-produced from materials such as silicone, rubber, or thermoplastic elastomers using conventional hydraulic, injection molding, or thermoforming processes, without requiring injection molding with liquid silicone. Therefore, the manufacturing cost of the elastic sleeve 200 is relatively low.

[0045] The button module 300 includes a button cap 310 and a button lever 320 connected to each other. The button cap 310 is for user pressing, and the button lever 320 passes through an annular protrusion 210. The button lever 320 and the annular protrusion 210 are in a sliding sealing fit for pressing or releasing the trigger switch 510 of the electronic device. Specifically, the annular protrusion 210 is integrally formed with the elastic sleeve 200 and is also elastic. The outer diameter of the button lever 320 is slightly larger than the inner diameter of the annular protrusion 210. Therefore, after the button lever 320 passes through the annular protrusion 210, the annular protrusion 210 can squeeze the button lever 320, causing the annular protrusion 210 to deform, thereby sealing the gap between the annular protrusion 210 and the button lever 320. Furthermore, when the button lever 320 is under pressure, the button lever 320 can slide relative to the annular protrusion 210 to achieve a sliding sealing fit. For example, the button module 300 here can be a volume button module, a power button module, etc. This application does not limit the type of button module 300.

[0046] In this application, the middle frame 100 is provided with a button hole 110, and an elastic sleeve 200 is provided inside the button hole 110. The elastic sleeve 200 and the button hole 110 are interference-fitted to achieve a seal between the elastic sleeve 200 and the button hole 110. The inner wall of the elastic sleeve 200 is provided with an annular protrusion 210 extending circumferentially along the elastic sleeve 200. The button rod 320 of the button module 300 is slidably sealed with the annular protrusion 210 to achieve a seal between the elastic sleeve 200 and the button rod 320. It can be seen that this application can achieve a seal between the button rod 320 and the button hole 110 using the elastic sleeve 200. Furthermore, the elastic sleeve 200 can be mass-produced, meaning its production cycle is short, allowing for rapid and continuous production of large quantities of products, reducing the unit production cost. Clearly, compared to the one-time molding of liquid silicone, this application using the elastic sleeve 200 can reduce the manufacturing cost of electronic devices.

[0047] Furthermore, since the elastic sleeve 200 of this application has an annular protrusion 210 inside, the diameter and axial extension length of the annular protrusion 210 are smaller than the diameter and axial extension length of the elastic sleeve 200. Therefore, the contact area between the button rod 320 and the annular protrusion 210 is smaller, the annular protrusion 210 obstructs the button rod 320 less, and the user presses the button module 300 with less effort.

[0048] In one alternative embodiment, please refer to Figure 5 The annular protrusion 210 has a cylindrical surface that contacts the surface of the button lever 320. In other words, the inner circumferential surface of the annular protrusion 210 is a cylindrical surface, and the cylindrical surface contacts the surface of the button lever 320.

[0049] In this embodiment, the inner circumferential surface of the annular protrusion 210 is cylindrical, and the shape of the outer circumferential surface of the button lever 320 matches the shape of the inner circumferential surface of the annular protrusion 210. Therefore, the contact between the annular protrusion 210 and the button lever 320 is a surface contact, with a large contact area, which improves the sealing reliability between the annular protrusion 210 and the button lever 320. Furthermore, the increased contact area between the annular protrusion 210 and the button lever 320 optimizes the guiding performance of the annular protrusion 210 on the button lever 320, preventing the button lever 320 from deflecting during sliding relative to the annular protrusion 210. Of course, the cross-section of the inner circumferential surface of the annular protrusion 210 can also be arc-shaped, in which case the annular protrusion 210 and the button lever 320 are in line contact. This application does not limit the specific shape of the inner circumferential surface of the annular protrusion 210.

[0050] In one optional embodiment, the contact area between the annular protrusion 210 and the button lever 320 is the first area, and the contact area between the elastic sleeve 200 and the button hole 110 is the second area. The ratio of the first area to the second area is 1 / 5 to 1 / 3. For example, the ratio of the first area to the second area can be 0.25, 0.28, 0.3, etc., and this application does not limit it.

[0051] Taking the second area as a constant as an example, if the ratio of the first area to the second area is less than 1 / 5, the first area is too small, and the contact area between the annular protrusion 210 and the button rod 320 is too small. Obviously, this will reduce the sealing reliability between the annular protrusion 210 and the button rod 320, and weaken the guiding performance of the annular protrusion 210 on the button rod 320. If the ratio of the first area to the second area is greater than 1 / 3, the first area is too large, and the contact area between the annular protrusion 210 and the button rod 320 is too large. The friction generated when the button rod 320 slides relative to the annular protrusion 210 is also too large. This requires the user to apply greater pressing force to the button cap 310 to make the button rod 320 slide relative to the elastic sleeve 200, which obviously will ruin the user's user experience.

[0052] Therefore, in this embodiment, the ratio of the first area to the second area is controlled between 1 / 5 and 1 / 3, so that the contact area between the annular protrusion 210 and the button rod 320 is within a suitable range. This ensures the sealing reliability between the annular protrusion 210 and the button rod 320 and the guiding performance of the annular protrusion 210 on the button rod 320, while reducing the friction generated when the button rod 320 slides relative to the annular protrusion 210, thus improving the user's experience.

[0053] In one optional embodiment, the coefficient of friction between the elastic sleeve 200 and the middle frame 100 is greater than the coefficient of friction between the button lever 320 and the elastic sleeve 200. For example, the coefficient of friction between the elastic sleeve 200 and the middle frame 100 can be greater than or equal to 1, such as 1.1, 1.5, etc.; the coefficient of friction between the button lever 320 and the elastic sleeve 200 can be less than or equal to 0.5, such as 0.1, 0.2, 0.3, etc.

[0054] In this embodiment, the coefficient of friction between the elastic sleeve 200 and the middle frame 100 is greater than the coefficient of friction between the button lever 320 and the elastic sleeve 200. That is, the coefficient of friction between the elastic sleeve 200 and the middle frame 100 is larger, while the coefficient of friction between the elastic sleeve 200 and the button lever 320 is smaller. The coefficient of friction is directly proportional to the frictional force; the larger the coefficient of friction, the greater the frictional force. Therefore, with this embodiment, the friction between the elastic sleeve 200 and the middle frame 100 is larger, which ensures the connection stability between them. The friction between the elastic sleeve 200 and the button lever 320 is smaller, which ensures that the button lever 320 can slide smoothly relative to the elastic sleeve 200. Of course, the coefficient of friction between the elastic sleeve 200 and the middle frame 100 can also be less than or equal to the coefficient of friction between the button lever 320 and the elastic sleeve 200; this application does not impose any limitation on this.

[0055] In one alternative embodiment, the button lever 320 is made of polyoxymethylene (POM), which has a lubricating effect. This reduces the friction between the button lever 320 and the elastic sleeve 200, thereby allowing the button lever 320 to slide smoothly relative to the elastic sleeve 200.

[0056] In one alternative embodiment, please refer to Figure 5 The button cap 310 and the button lever 320 are separately configured. The end of the button lever 320 opposite to the button cap 310 has a limiting protrusion 321. The limiting protrusion 321 and the button lever 320 are integrally formed. The limiting protrusion 321 and the inner wall of the elastic sleeve 200 and / or the middle frame 100 are in the first direction ( Figure 5 The upper limit engagement (in the direction indicated by the arrow m) prevents the button lever 320 from disengaging from the button hole 110. The first direction is from the button lever 320 towards the button cap 310. It should be noted that when the limiting protrusion 321 engages with the inner wall of the middle frame 100 in the first direction, the limiting protrusion 321 extends beyond the outer circumference of the elastic sleeve 200 along its radial direction. Furthermore, the inner wall of the middle frame 100 has high structural strength, thus providing high stability for limiting the limiting protrusion 321 using the middle frame 100, ensuring the stability of the button lever 320's position.

[0057] In this embodiment, a limiting protrusion 321 is provided at the end of the button lever 320 opposite to the button cap 310. The limiting protrusion 321 is integrally formed with the button lever 320. This integral forming eliminates the need to connect the limiting protrusion 321 to the connection point on the button lever 320, reducing the risk of loosening, detachment, or breakage of the connection, thereby ensuring the limiting stability between the limiting protrusion 321 and the inner wall of the elastic sleeve 200 and / or the middle frame 100. Of course, the limiting protrusion 321 can also be separately provided from the button lever 320. In this case, the limiting protrusion 321 can be a retaining spring, which can be detachably connected to the button lever 320.

[0058] The steps for assembling the button module 300 onto the middle frame 100 in this embodiment are as follows: the end of the button rod 320 away from the limiting protrusion 321 is inserted into the annular protrusion 210 of the elastic sleeve 200 along the direction from the inside of the middle frame 100 to the outside of the middle frame 100, and the button cap 310 is connected to the end of the button rod 320 away from the limiting protrusion 321.

[0059] In one alternative embodiment, please refer to Figure 5 The limiting protrusion 321 can be limited to engage with the end face of the elastic sleeve 200 away from the button cap 310 in the first direction.

[0060] In this embodiment, the end of the elastic sleeve 200 facing away from the keycap 310 is used to limit the engagement of the keycap 310 in the first direction. This eliminates the need for additional limiting structures, such as stepped surfaces, on the elastic sleeve 200, which simplifies the structure of the elastic sleeve 200 and reduces the manufacturing difficulty of the elastic sleeve 200.

[0061] In one alternative embodiment, please refer to Figure 5 The end face of the limiting protrusion 321 facing away from the button cap 310 is coplanar with the end face of the button lever 320 facing away from the button cap 310. In other words, the end face of the limiting protrusion 321 facing away from the button cap 310 and the end face of the button lever 320 facing away from the button cap 310 are both planar.

[0062] Since the end face of the button lever 320 facing away from the button cap 310 is used to press the trigger switch 510, in this embodiment, the end face of the limiting protrusion 321 facing away from the button cap 310 is coplanar with the end face of the button lever 320 facing away from the button cap 310. This allows both the end face of the button lever 320 facing away from the button cap 310 and the end face of the limiting protrusion 321 facing away from the button cap 310 to press the trigger switch 510 together. This results in a larger contact area between the button module 300 and the trigger switch 510, reducing the pressure exerted by the button module 300 on the trigger switch 510 and thus reducing the risk of damage to the trigger switch 510. Of course, along the axial direction of the button lever 320, the end face of the limiting protrusion 321 facing away from the button cap 310 can also be spaced apart from the end face of the button lever 320 facing away from the button cap 310; this application does not impose any limitation on this.

[0063] In one alternative embodiment, please refer to Figure 5 The button cap 310 has a receiving groove 311 on its end face facing the button rod 320. A portion of the button rod 320 is located within the receiving groove 311, and the button rod 320 is connected to the inner wall of the receiving groove 311 by an adhesive layer 400. Specifically, the adhesive layer 400 can be formed by curing an adhesive.

[0064] In this embodiment, the button lever 320 and the receiving groove 311 on the button cap 310 are connected by an adhesive layer 400, which enables the button cap 310 and the button lever 320 to be tightly bonded, reducing loosening and detachment, thereby improving the service life of the button module 300 and ensuring that the button module 300 will not become unresponsive or malfunction due to connection problems during frequent use. Furthermore, the end face of the button cap 310 has a receiving groove 311, and a portion of the button lever 320 is located within the receiving groove 311. After the button lever 320 is placed in the receiving groove 311, adhesive is injected into the receiving groove 311. The adhesive can fully fill the space around the button lever 320 and the receiving groove 311, and the adhesive can contact the sides and bottom of the button lever 320, greatly increasing the contact area between the adhesive and the button lever 320, thereby enhancing the connection strength between the button lever 320 and the button cap 310.

[0065] In one alternative embodiment, please refer to Figure 5 The receiving tank 311 includes a first tank 301 and a second tank 302 arranged sequentially and connected along a first direction. The volume of the first tank 301 is greater than the volume of the second tank 302. The cross-sectional area of ​​the first tank 301 gradually decreases along the first direction. The minimum cross-sectional area of ​​the first tank 301 is equal to the cross-sectional area of ​​the second tank 302.

[0066] In this embodiment, the cross-sectional area of ​​the first groove 301 gradually decreases along the first direction. Therefore, the inner wall of the first groove 301 can form a guiding structure. When the button rod 320 is inserted into the receiving groove 311, the inner wall of the first groove 301 can guide the button rod 320 into the second groove 302, reducing the difficulty of assembling the button rod 320 into the receiving groove 311. Furthermore, the volume of the first groove 301 is greater than the volume of the second groove 302. Compared to a situation where the volume of the first groove 301 is equal to the volume of the second groove 302, the receiving groove 311 in this embodiment can hold more adhesive, thereby increasing the volume of the adhesive layer 400, increasing the structural strength of the adhesive layer 400, and ensuring the stability of the adhesive layer 400 in fixing the button rod 320 to the receiving groove 311.

[0067] In one alternative embodiment, please refer to Figure 4The electronic device also includes a circuit board 500, which is located inside the middle frame 100. The circuit board 500 is provided with a trigger switch 510, which is set corresponding to the button lever 320. The trigger switch 510 is elastic and can apply a reset force in a first direction to the button lever 320 after being pressed. The first direction is the direction from the button lever 320 to the button cap 310.

[0068] When the user presses the button module 300, the button module 300 moves in the opposite direction of the first direction. The button lever 320 presses the trigger switch 510, causing the trigger switch 510 to elastically deform and thus triggering the trigger switch 510. When the user releases the button module 300, the trigger switch 510 returns to its elastic deformation, thereby applying a reset force in the first direction to the button lever 320, which in turn drives the button module 300 to move in the first direction. Therefore, this embodiment utilizes the elasticity of the trigger switch 510 itself to reset the button module 300, eliminating the need for additional elastic components to reset the button module 300, thus simplifying the structure of the electronic device.

[0069] In one alternative embodiment, please refer to Figure 5 The button hole 110 includes a first hole segment 111 and a second hole segment 112 distributed sequentially along a first direction. The cross-sectional area of ​​the first hole segment 111 is smaller than that of the second hole segment 112. The elastic sleeve 200 is interference-fitted with the first hole segment 111. The first direction is the direction from the button rod 320 to the button cap 310.

[0070] The button cap 310 includes a first part 312 and a second part 313 that are sequentially distributed and connected along a first direction. Along the radial direction of the elastic sleeve 200, the outer peripheral surface of the second part 313 extends beyond the outer peripheral surface of the first part 312. That is, the cross-sectional area of ​​the area enclosed by the outer peripheral surface of the first part 312 is smaller than the cross-sectional area of ​​the area enclosed by the outer peripheral surface of the second part 313. When the button lever 320 releases the trigger switch 510, at least a portion of the second part 313 is located within the second hole segment 112. That is, when the user has not yet pressed the button module 300, at least a portion of the second part 313 is located within the second hole segment 112.

[0071] In this embodiment, when the button lever 320 releases the trigger switch 510, at least a portion of the second part 313 is located within the second hole segment 112. Therefore, the first part 312 is completely located within the second hole segment 112. Since the cross-sectional area of ​​the region enclosed by the outer peripheral surface of the first part 312 is smaller than the cross-sectional area of ​​the region enclosed by the outer peripheral surface of the second part 313, the gap between the first part 312 and the second hole segment 112 is larger, while the gap between the second part 313 and the second hole segment 112 is smaller. During the sliding process of the button cap 310 relative to the second hole segment 112, the first part 312 is less likely to come into contact with and rub against the inner wall of the second hole segment 112, thereby reducing the frictional force on the button cap 310 and allowing the user to easily press the button cap 310. Furthermore, the second part 313 can guide the button cap 310, preventing the button module 300 from jamming due to the button cap 310 being tilted. Of course, the outer peripheral surface of the first part 312 can also be flush with the outer peripheral surface of the second part 313; this application does not limit this.

[0072] The foregoing embodiments of this application focus on describing the differences between various embodiments. As long as the different optimization features between embodiments are not contradictory, they can be combined to form better embodiments. For the sake of brevity, these differences will not be elaborated upon here. The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art, under the guidance of this application, can make many modifications without departing from the spirit and scope of the claims, all of which fall within the protection scope of this application.

Claims

1. An electronic device, characterized in that, include: A middle frame (100) is provided with button holes (110); An elastic sleeve (200) is located inside the key hole (110) and is interference-fitted with the key hole (110). The inner wall of the elastic sleeve (200) is formed with an annular protrusion (210) extending circumferentially along the elastic sleeve (200). A button module (300) includes a button cap (310) and a button lever (320) connected to each other. The button cap (310) is for users to press, and the button lever (320) passes through the annular protrusion (210). The button lever (320) and the annular protrusion (210) are slidably sealed together to press or release the trigger switch (510) of the electronic device.

2. The electronic device according to claim 1, characterized in that, The annular protrusion (210) has a cylindrical surface that contacts the surface of the button lever (320); and / or, The contact area between the annular protrusion (210) and the button rod (320) is the first area, and the contact area between the elastic sleeve (200) and the button hole (110) is the second area. The ratio of the first area to the second area is 1 / 5 to 1 / 3.

3. The electronic device according to claim 1, characterized in that, The coefficient of friction between the elastic sleeve (200) and the middle frame (100) is greater than the coefficient of friction between the button rod (320) and the elastic sleeve (200); and / or, The button lever (320) is made of polyoxymethylene material.

4. The electronic device according to claim 1, characterized in that, The button cap (310) and the button lever (320) are separately disposed. The end of the button lever (320) opposite to the button cap (310) is provided with a limiting protrusion (321). The limiting protrusion (321) and the button lever (320) are integrally formed. The limiting protrusion (321) is in a limiting engagement with the inner wall of the elastic sleeve (200) and / or the middle frame (100) in a first direction. The first direction is the direction from the button lever (320) to the button cap (310).

5. The electronic device according to claim 4, characterized in that, The limiting protrusion (321) can be limited in the first direction to engage with the end face of the elastic sleeve (200) away from the button cap (310).

6. The electronic device according to claim 4, characterized in that, The end face of the limiting protrusion (321) facing away from the button cap (310) is coplanar with the end face of the button lever (320) facing away from the button cap (310).

7. The electronic device according to claim 4, characterized in that, The button cap (310) has a receiving groove (311) on the end face facing the button rod (320), a part of the button rod (320) is located in the receiving groove (311), and the button rod (320) is connected to the inner wall of the receiving groove (311) through a colloid layer (400).

8. The electronic device according to claim 7, characterized in that, The receiving groove (311) includes a first groove (301) and a second groove (302) arranged sequentially and connected along the first direction. The volume of the first groove (301) is greater than the volume of the second groove (302). The cross-sectional area of ​​the first groove (301) gradually decreases along the first direction. The minimum cross-sectional area of ​​the first groove (301) is equal to the cross-sectional area of ​​the second groove (302).

9. The electronic device according to claim 1, characterized in that, The electronic device also includes a circuit board (500), which is disposed within the middle frame (100). The circuit board (500) is provided with a trigger switch (510), which is provided corresponding to the button lever (320). The trigger switch (510) is elastic, and after being pressed, the trigger switch (510) can apply a reset force in a first direction to the button lever (320), the first direction being the direction from the button lever (320) to the button cap (310).

10. The electronic device according to claim 1, characterized in that, The button hole (110) includes a first hole segment (111) and a second hole segment (112) distributed sequentially along a first direction. The cross-sectional area of ​​the first hole segment (111) is smaller than the cross-sectional area of ​​the second hole segment (112). The elastic sleeve (200) is interference-fitted with the first hole segment (111). The first direction is the direction from the button rod (320) to the button cap (310). The button cap (310) includes a first part (312) and a second part (313) that are sequentially distributed and connected along the first direction. Along the radial direction of the elastic sleeve (200), the outer peripheral surface of the second part (313) extends beyond the outer peripheral surface of the first part (312). When the button lever (320) releases the trigger switch (510), at least a portion of the second part (313) is located within the second hole segment (112).

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