CN215183601U - Switch assembly and mobile terminal - Google Patents

Abstract

The utility model relates to a switch module and mobile terminal. Wherein, switch module installs in the casing, and switch module includes: the circuit board is provided with a switch and is positioned in the mounting groove of the shell; a sealing member surrounding the switch, the sealing member being located between the circuit board and the mounting groove sidewall for sealing the mounting groove; and the key penetrates through the shell and the sealing piece to extend into the mounting groove and is abutted to the switch. The utility model discloses, be in the same place through the sealing member is fixed with the circuit board, form a whole, when assembling mobile terminal with switch module, reduced one installation procedure, it is very convenient, also improved the assembly precision simultaneously. In addition, through the sealed convex part of sealing member confined and the closed groove interference fit of mounting groove, sealed channel length is longer, and dustproof and waterproof performance is effectively promoted.

Description

Switch assembly and mobile terminal

Technical Field

The utility model relates to an electronic equipment technical field especially relates to switch module and mobile terminal.

Background

With the continuous progress of science and technology, the functions of the mobile terminal are more and more. The entity keys for realizing various functions are necessary, such as a switch machine key, a volume adjusting key, a screen locking key, a photographing key and the like.

At present, the waterproof performance of the mobile terminal is effectively improved, but the problems of poor sealing performance, poor key hand feeling and the like exist in a structure for preventing a key hole from being waterproof.

SUMMERY OF THE UTILITY MODEL

For overcoming the problem that exists among the correlation technique, the utility model provides a switch module and mobile terminal.

According to the present disclosure there is provided a switch assembly mounted to a housing, wherein the switch assembly comprises: a circuit board provided with a switch; a sealing member surrounding the switch, the sealing member being located between the circuit board and the mounting groove sidewall for sealing the mounting groove; and the key penetrates through the shell and the sealing piece to extend into the mounting groove and is abutted to the switch.

In some embodiments, the first face of the seal is secured to the circuit board by a waterproof adhesive backing; and a convex part is arranged on a second surface of the sealing element opposite to the first surface, and the convex part is in interference fit with the mounting groove.

In some embodiments, the protrusions have a circular, elliptical, or polygonal profile.

In some embodiments, the cross-sectional shape of the protrusion is arcuate.

In some embodiments, the protrusions include first and second protrusions disposed circumferentially.

In some embodiments, the switch assembly further comprises: and the reinforcing plate is fixed on the surface of the circuit board, which is deviated from the switch.

There is also provided according to the present disclosure a mobile terminal comprising: the key hole is communicated to the mounting groove from the outer side of the shell; a switch assembly disposed on the housing, wherein the switch assembly is the switch assembly of any of the above embodiments.

In some embodiments, the mounting groove is provided with a groove surrounding the key hole and closed, and the convex part of the sealing element is in interference fit with the groove.

In some embodiments, the profile shape of the groove is adapted to the profile shape of the protrusion.

In some embodiments, the cross-sectional shape of the groove is adapted to the cross-sectional shape of the protrusion.

In some embodiments, the mobile terminal further comprises: the sealing element is provided with a through hole; the key penetrates through the key hole and the through hole of the sealing piece and abuts against the switch, and a gap is formed between the key and the through hole.

The embodiment of the utility model provides a technical scheme can include following beneficial effect: this switch module of disclosure, through the mounting groove of sealing member seal shell, prevent that dust or liquid from getting into the casing inside from the mounting groove, pass the sealing member through the button and directly support in the switch, promote to press and feel.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic structural diagram of a mobile terminal shown according to an exemplary embodiment of the present disclosure.

Fig. 2 is a schematic cross-sectional view a-a of fig. 1, shown in accordance with an exemplary embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.

In the related art, the waterproof pin assembly is interference-fitted in the key hole of the casing to seal the key hole and prevent dust or liquid from entering the casing through the key hole. Particularly, waterproof subassembly includes the waterproof needle of column and the silica gel circle of cover on locating waterproof needle. The waterproof needle with the silica gel ring is arranged in the through hole of the shell, the waterproof needle is positioned between the key and the switch, and the silica gel ring sleeved on the waterproof needle is in interference fit with the through hole.

Above-mentioned waterproof scheme, waterproof silica gel circle produces sliding friction for the button hole when the user presses the button, and long-term, wearing and tearing are serious, lead to the leakproofness inefficacy. In addition, the pressing force when pressing the key needs to be transmitted to the switch on the circuit board through the waterproof needle, resulting in poor pressing hand feeling. In addition, because the waterproof needle assembly is too small, when the waterproof needle assembly is installed in the through hole, the circuit board and the waterproof assembly need to be assembled one by one, which is very inconvenient.

In view of the above problem, the embodiment of the present disclosure provides a switch assembly, and when the switch assembly is installed in a mobile terminal, the assembly is convenient and fast, the sealing effect is good, and the hand feeling of the push switch is improved.

Fig. 1 is a schematic structural diagram of a mobile terminal shown according to an exemplary embodiment of the present disclosure. Fig. 2 is a schematic cross-sectional view a-a of fig. 1, shown in accordance with an exemplary embodiment of the present disclosure.

As shown in fig. 1 and 2, the switch assembly 40 provided by the embodiment of the present disclosure is applied to a mobile terminal 100. The mobile terminal 100 may be a smart phone, a tablet computer, a notebook computer, a personal digital assistant, a wearable device such as a smart band, a smart watch, and the like. The embodiments of the present disclosure are described by taking a smart phone as an example, but not limited thereto.

The switch assembly 40 is installed in the mobile terminal 100. The mobile terminal 100 may include a housing 10, the housing 10 defines a mounting groove 12 and a key hole 11, the mounting groove 12 is used for accommodating the switch assembly 40, and the key hole 11 is communicated from an outer side of the housing 10 to the mounting groove 12. For example, the mounting groove 12 is opened upward and has a bottom wall and opposite first and second side walls, wherein the first side wall is close to the outer side of the casing 10, and the key hole 11 penetrates through the casing 10 and the first side wall of the mounting groove 12 from the outer side of the casing 10, so that the key hole 11 is communicated with the mounting groove 12. Since the key hole 11 is communicated with the mounting groove 12, dust or liquid may enter the inside of the casing 10 from the communicated key hole 11 and mounting groove 12, which may affect the normal use of the devices inside the casing 10. Therefore, the mounting groove 12 needs to be sealed.

The switch assembly 40 of the disclosed embodiment may include a circuit board 42, a seal 41, and a key 48.

The circuit board 42 is fixed to the second sidewall of the mounting groove 12. The circuit board 42 is provided with a switch 46. Wherein the front side of the circuit board 42 may be integrated with one or more switches to perform one or more corresponding functions. For example, the circuit board 42 may be integrated with a switch to implement a power-on/off function, a photographing function, a screen locking function, and the like. For another example, the circuit board 42 may be integrated with two switches to implement a volume adjustment function. The switch 46 may be, for example, a snap switch, which has a certain resilience when the snap is pressed open. The circuit board can be a Flexible Printed Circuit (FPC), and the back of the FPC, that is, the face away from the switch, can be pasted with a reinforcing plate 44 through a double-sided adhesive tape 43 or glue dispensing to support the FPC and improve the supporting strength. The flexible circuit board is fixed to the second sidewall of the mounting groove 12 by a reinforcing plate. The back of the stiffener 44 is secured to the second side wall by adhesive 45 (e.g., a backing adhesive). The reinforcing plate can be a steel plate or a plastic plate. But is not limited thereto and the circuit board may be a rigid circuit board so that a support of the reinforcing steel plate may not be required.

The sealing member 41 surrounds the switch 46, and the sealing member 41 is located between the circuit board 42 and a side wall (a first side wall) of the mounting groove 12 for sealing the mounting groove 12 and preventing dust or liquid from entering the inside of the housing 10 from the mounting groove 12 to affect the performance of the devices inside the housing 10. The button 48 extends through the housing 10 and the seal 41 into the mounting groove 12 and abuts the switch 46. The key 48 directly abuts against the switch 46 without the interval of the sealing member 41 in the middle, and when a user presses the key 48, the pressing force is directly transmitted to the switch 46, so that the pressing hand feeling can be improved.

In some embodiments, the seal 41 surrounds the switch 46, and the first face 411 of the seal 41 is secured to the circuit board 42. The sealing member 41 includes a first face 411 facing the circuit board 46, and a second face 412 opposite to the first face 411. An avoiding groove for avoiding the switch 46 may be formed in the first surface 411 of the sealing member 41, and the switch 46 may be covered in the avoiding groove. The first face 411 may be fixed to the front face of the circuit board 42, i.e., the face on which the switch 46 is mounted, by a waterproof backing adhesive 47, so that the sealing member 41 is fixed together with the circuit board 42 to form an integral module. Thus, the sealing element 41 and the circuit board 42 can be installed in the installation groove 12 from the opening of the installation groove 12, so that an installation procedure is omitted, and the installation efficiency is improved; because a mounting procedure is reduced, the accumulated tolerance caused by mounting is also reduced, and the mounting precision is improved. In addition, the sealing member 41 surrounds the switch 46, and the switch 46 is covered in the avoiding groove, so that when the switch assembly 40 is assembled in the mounting groove 12 of the housing 10, the risk of scratching the switch 46 is avoided, the switch 46 is protected, and the reliability of the switch 46 is improved.

At least one closed protrusion 413 is provided on the second surface 412 of the sealing member 41 for cooperating with a sidewall of the mounting groove 12 to seal the mounting groove 12. A closed protrusion 413 protruding outward is provided on the second surface 412 of the seal 41. The closed convex portion 413 can ensure sealing reliability. A groove 121 corresponding to the protrusion 413 is formed in a first side wall (a wall where the key hole 11 is formed, that is, the above-mentioned wall close to the outer side of the casing 10) of the mounting groove 12, the groove 121 is disposed around (surrounding) the key hole 11, and the groove 121 is continuous and is a closed-loop groove in a direction surrounding the key hole 11. Correspondingly, the closed convex part 413 is also a continuous and closed-loop convex part, and the convex part 413 of the sealing element 41 is in interference fit with the groove 121 to ensure the omnibearing sealing effect. The convex portion 413 of the sealing member 41 is interference-fitted into the groove 121 by self-deformation when the switch assembly 40 is mounted to the mounting groove 12. Wherein, the convex part 413 can be slightly bigger than the size of the groove 121, so that the convex part 413 generates deformation by itself and enters from the opening of the groove 121, and when the convex part 413 enters the inside of the groove 121, the convex part 413 recovers deformation by itself and is in interference fit with the groove, and the sealing effect is realized. The sealing member 41 may be a soft rubber, such as a flexible material like silicone rubber or rubber. The outline shape of the closed convex portion 413 may be a circle, an ellipse, a racetrack shape, or a polygon, and is a closed ring shape. Correspondingly, the closed groove 121 may also have a circular, oval, racetrack, or polygonal profile.

Since the first surface 411 of the sealing member 41 is fixed to the circuit board 42 by the waterproof adhesive 47 or glue, the protrusion 413 of the second surface 412 of the sealing member 41 is in interference fit with the groove 121 of the second sidewall of the mounting groove 12, so as to seal the mounting groove 12 and prevent dust or liquid from entering the inside of the housing 10 from the mounting groove 12, thereby protecting the devices inside the housing 10. In addition, because the second surface 412 is provided with at least one closed convex part 413, the closed convex part 413 and the closed groove 121 are in interference fit, the length of a sealing channel is long, the dustproof and waterproof performance is effectively improved, and the sealing reliability is ensured.

Therefore, the switch assembly 40 of the embodiment of the present disclosure is fixed to the circuit board 42 through the sealing member 41 to form a whole, so that when the switch assembly 40 is assembled to the mobile terminal 100, one installation process is reduced, convenience is provided, and the assembly precision is improved. In addition, the convex part 413 sealed by the sealing element 41 is in interference fit with the sealing groove 121 of the mounting groove 12, the sealing channel is long, and the dustproof and waterproof performance is effectively improved.

In one example, the convex 413 profile (profile) of the seal 41 may be circular, elliptical, or polygonal. The polygon may be, for example, a rectangle, a triangle, or an irregular closed shape. These shapes are continuous and closed, so that the mounting groove 12 can be sealed in all directions, dust or liquid from the key hole 11 can be more effectively prevented from entering the inside of the shell 10 from the mounting groove 12, and the sealing performance is improved.

In one example, the cross-sectional shape (longitudinal cross-section shown) of the convex portion 413 may be an arc shape, which is convex outward. Because convex part 413 interference fit sets up curved convex part 413 in recess 121 to in smoothly transition to recess 121 through the arc, improve the equipment convenience, curved convex part 413 has also avoided taking place to interfere with recess 121 simultaneously, leads to the risk of scratch damage convex part 413, forms effectual protection to convex part 413, in order to ensure sealed effect.

In one embodiment, the two protrusions 413 are a first protrusion and a second protrusion, and the first protrusion surrounds the second protrusion. For example, the second protrusion surrounds the outer side or the inner side of the first protrusion. The first convex part and the second convex part are in interference fit with the first groove and the second groove on the mounting groove 12 respectively, so that two seals are formed, and when the convex part on the inner side is damaged, the convex part on the outer side can also play a role in sealing so as to ensure the sealing reliability.

In some embodiments, the sealing member 41 defines a through hole 414, and the through hole 414 is used for the key 48 to pass through. The front end of the button 48 passes through the through hole 414 of the seal 41 against the switch 46 to trigger the switch function. The through hole 414 and the push button 48 form a gap therebetween, so that when the push button 48 presses the switch 46, the push button 48 does not interfere with the through hole 414, and therefore, the seal 41 is not worn, and the durability of the seal 41 is improved. In addition, the key 48 is not contacted with the sealing member 41, the sealing member 41 is fixed on the side wall of the circuit board 42 and the mounting groove 12 in a stationary manner, and the sealing member 41 itself is not deformed, so that the connection and fixation of the first surface 411 and the second surface 412 of the sealing member 41 are not affected, and the sealing effect is ensured.

There is also provided a mobile terminal 100 according to an embodiment of the present disclosure, which includes a housing 10 and a switch assembly 40. Wherein the switch assembly 40 may be the switch assembly mentioned in any of the above embodiments.

As shown in fig. 1 and 2, the housing 10 serves as an external appearance of the mobile terminal 100, and supports and protects various functional components inside the mobile terminal 100. The material of the housing 10 may be metal or plastic. The key hole 11 is used for passing the key 48 so that the front end of the key 48 protrudes into the inside of the casing 10, and the switch 46 is pressed to trigger the switch function.

The shape of the housing 10 may be square, rectangular, circular, or oval, etc. Taking the rectangular case 10 as an example, the key holes 11 may be disposed at the side of the case 10, so that the keys 48 may be used as side keys of the mobile terminal 100, such as a volume key, a screen lock key, etc. In other examples, the key hole 11 may be disposed at the top of the casing 10, so that the key 48 may be used as a power on/off key, a photographing key, etc. of the mobile terminal 100. Further, in some examples, the number of key holes 11 may be one or more for the passage of one or more keys 48.

In some embodiments, the housing 10 may include a front housing and a rear housing. The front case may serve as an inner support of the mobile terminal 100 to support the components. For example, the front portion of the front housing may support the stationary display screen assembly 30 and the rear portion may support the stationary components such as the motherboard, battery, and camera. The front case may also be referred to as a middle frame. The rear shell is fixedly connected with the front shell to form a closed accommodating space for accommodating the water of each component. In other embodiments, one or more through holes may be formed in the rear housing. For example, the rear case may include a bottom plate and a bezel formed around the bottom plate, and the bezel may include two opposite side walls and top and bottom walls adjacent to the two side walls. Two through holes can be formed in the side wall of the rear shell and are respectively used for two keys to pass through. Such as a lock screen key and a volume key. But not limited to this, a through hole may be opened in the top wall of the rear housing, and the number of the through holes may be one or more. The rear case may also be referred to as a rear cover (battery cover). It should be noted that although fig. 1 shows that the side wall of the front casing (middle frame) is provided with a through hole for the key 48 to pass through, the through hole is not limited thereto, and in other embodiments, the side wall of the rear casing (battery cover) may be provided with one or more through holes for the side key 48 to pass through.

The case 10 may be opened with a mounting groove 12 communicating with the key hole 11, wherein the key hole 11 is disposed at an end of the mounting groove 12 facing to an outside, and the key hole 11 communicates from an outside of the case 10 to the mounting groove 12. The switch assembly 40 is mounted in the mounting groove, and more particularly, the mounting groove 12 has opposite first and second sidewalls in the pressing direction, wherein the first sidewall is closer to the outside of the housing 10. The key hole 11 penetrates the case 10 and the first sidewall from the outside of the case 10. The circuit board 42 may be fixed to a side wall of the mounting groove 12 away from the key hole 11, i.e., a second side wall, and the circuit board 42 may be adhesively fixed to the second side wall through the reinforcing plate 44. The switches on the circuit board 42 correspond to the keys 48 so that the front ends of the keys 48 can press the switches 46 on the switch circuit board 42.

As described above, the sealing member 41 surrounds the switch 46, and the sealing member 41 is located between the circuit board 42 and the side wall of the mounting groove 12 for sealing the mounting groove 12 and preventing dust or liquid from entering the interior of the housing 10 from the mounting groove 12 to affect the performance of the devices inside the housing 10. The button 48 extends through the housing 10 and the seal 41 into the mounting groove 12 and abuts the switch 46. The key 48 directly abuts against the switch 46 without the gap of the sealing member 41 therebetween, and when a user presses the key 48, the pressing force is directly transmitted to the switch 46, so that the pressing feeling can be improved.

In some embodiments, a groove 121 surrounding the key hole 11 and closed is formed on a first side wall of the mounting groove 12, i.e., the above-mentioned wall close to the outer side of the casing 10. The closed groove 121 is a groove that is continuous and closed-loop in the direction around the key hole 11. The number of grooves 121 may be adapted to the above-mentioned protrusions 413 on the seal 41. Wherein the convex portion 413 of the sealing member 41 is interference-fitted in the groove 121. The convex portion 413 of the sealing member 41 may be interference-fitted into the groove 121 by being deformed by itself. Wherein, the convex part 413 can be slightly larger than the size of the groove 121, so that the convex part 413 generates deformation by itself and enters from the opening of the groove 121, and when the convex part 413 enters the groove 121, the convex part 413 recovers the deformation by itself and is in interference fit with the groove, and the sealing effect is realized.

In the mobile terminal 100 of the embodiment of the present disclosure, since the first surface 411 of the sealing member 41 is fixed to the circuit board 42 by the back adhesive 47 or glue, the convex portion 413 of the second surface 412 of the sealing member 41 is in interference fit with the groove 121 of the second sidewall of the groove 121, so as to seal the mounting groove 12, prevent dust or liquid from entering the inside of the housing 10 from the mounting groove 12, and protect the devices inside the housing 10. In addition, because the second surface 412 is provided with at least one closed convex part 413, the closed convex part 413 is matched with the closed groove 121, the length of the sealing channel is long, and the dustproof and waterproof performance is effectively improved.

In some embodiments, the contour (profile) shape of the groove 121 is adapted to the contour shape of the protrusion 413. For example, the outer shape of the groove 121 may be circular, elliptical, or polygonal. Such as rectangular, triangular, or irregular closed shapes. These shapes are continuous and closed, so that the convex part 413 and the groove 121 are in interference fit, the mounting groove 12 can be sealed in all directions, dust or liquid from the key hole 11 can be more effectively prevented from entering the casing 10 from the mounting groove 12, and the sealing performance is improved.

In some embodiments, the cross-sectional shape of groove 121 is adapted to the cross-sectional shape of protrusion 413. For example, the cross-sectional shape of the groove 121 is an arc. The arc shape may be understood as an arc formed by an ellipse removing less than half of the short axis in the direction of the short axis. The size of the opening of the arc-shaped groove 121 is smaller than that of the long axis, i.e., the opening is smaller and the inside is larger. Thus, when the arc-shaped convex part 413 is in interference fit in the arc-shaped groove 121, the convex part 413 is effectively prevented from falling off from the groove 121.

In some embodiments, the mobile terminal 100 further comprises a key 48, the key 48 passing through the key hole 11 and the above mentioned through hole of the sealing member 41, wherein there is a gap between the key and the through hole.

The material of the key 48 may match the material of the housing 10, and may be a metal material or a plastic material, for example. As shown in fig. 2, the key 48 may be partially exposed from the key hole 11 to the outside of the casing 10, thereby serving as a part of the appearance of the casing 10 to supplement the missing part of the casing with the key hole 11. The key body exposed outside the housing 10 may be substantially flush with or slightly protruded from the outer surface of the housing for the user to touch and press. In addition, the size of the key hole 11 can be matched with the size of the key 48 to reduce the gap between the key 48 and the key hole 11, but no frictional interference is generated between the key 48 and the key hole 11.

The through hole 414 and the push button 48 form a gap therebetween, so that when the push button 48 presses the switch 46, the push button 48 does not interfere with the through hole 414, the seal member 41 is not worn, and the durability of the seal member 41 is improved. In addition, the key 48 is not contacted with the sealing member 41, the sealing member 41 is fixed on the side wall of the circuit board 42 and the mounting groove 12 in a stationary manner, and the sealing member 41 itself is not deformed, so that the connection and fixation of the first surface 411 and the second surface 412 of the sealing member 41 are not affected, and the sealing effect is ensured.

In some embodiments, the switch 46 is exposed to the through hole 414 of the sealing member 41, and the front end of the key 48 abuts against the switch 46. The front end of the key 48 can directly pass through the through hole 414 to directly contact with the switch 46 so as to press the switch 46, so that the pressing force generated by pressing the key 48 by a user is directly transmitted to the switch 46, and the pressing hand feeling can be improved.

In some embodiments, the key 48 may include a key body and a stopper pin disposed on the key body. The button body sets up in key hole 11, and the button body includes front end and rear end, and in the front end can stretch into mounting groove 12, the rear end can stretch out outside the casing to supply the user to press the operation. A guide groove is provided on the surface of the key hole 11, and the guide groove extends in the pressing direction by a predetermined stroke. The limiting pin is located in the guide groove, the limiting pin is matched with the guide groove to limit the pressing stroke of the key, the key is limited in the through hole of the shell, and the key is prevented from being separated from the shell.

When the key is used, a user presses the rear end of the key body, the limiting pin slides in the guide groove along the pressing direction, and the front end of the key 48 directly abuts against the switch 46 and presses the switch 46 to trigger the switch function.

It is understood that the term "plurality" in the present invention means two or more, and other terms are similar. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. The singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It will be further understood that the terms "first," "second," and the like are used to describe various information and that such information should not be limited by these terms. These terms are only used to distinguish one type of information from another and do not denote a particular order or importance. Indeed, the terms "first," "second," and the like are fully interchangeable. For example, the first information may also be referred to as second information, and similarly, the second information may also be referred to as first information, without departing from the scope of the present invention.

It will be further understood that the terms "central," "longitudinal," "lateral," "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present embodiment and to simplify the description, but do not indicate or imply that the device or component being referred to must have a particular orientation, be constructed and operated in a particular orientation.

It is further understood that, unless otherwise specified, "connected" includes direct connections between the two without the presence of other elements, as well as indirect connections between the two with the presence of other elements.

It is further to be understood that while operations are depicted in the drawings in a particular order, this is not to be understood as requiring that such operations be performed in the particular order shown or in serial order, or that all illustrated operations be performed, to achieve desirable results. In certain environments, multitasking and parallel processing may be advantageous.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims (10)

1. A switch assembly, wherein the switch assembly is mounted to a housing, wherein the switch assembly comprises:

the circuit board is provided with a switch and is positioned in the mounting groove of the shell;

a sealing member surrounding the switch, the sealing member being located between the circuit board and the mounting groove sidewall for sealing the mounting groove; and

and the key penetrates through the shell and the sealing piece to extend into the mounting groove and is abutted to the switch.

2. The switch assembly of claim 1,

the first surface of the sealing element is fixed on the circuit board through waterproof back glue;

and a convex part is arranged on a second surface of the sealing element opposite to the first surface, and the convex part is in interference fit with the mounting groove.

3. The switch assembly of claim 2,

the outline of the convex part is circular, oval or polygonal.

4. The switch assembly of claim 2,

the cross section of the convex part is arc-shaped.

5. The switch assembly of claim 2,

the convex part comprises a first convex part and a second convex part which are arranged in a surrounding mode.

6. The switch assembly of any one of claims 1-5, further comprising:

and the reinforcing plate is fixed on one surface of the circuit board, which deviates from the switch.

7. A mobile terminal, comprising:

the key comprises a shell, a key body and a key cover, wherein the shell is provided with a mounting groove and a key hole, and the key hole is communicated from the outer side of the shell to the mounting groove;

a switch assembly disposed in the housing, wherein the switch assembly is the switch assembly of any one of claims 1-6.

8. The mobile terminal of claim 7,

the mounting groove is provided with a groove which surrounds the key hole and is sealed, and the convex part of the sealing element is in interference fit with the groove.

9. The mobile terminal of claim 8,

the contour shape of the groove is matched with that of the convex part.

10. The mobile terminal according to any of claims 7-9,

the sealing element is provided with a through hole;

the key penetrates through the key hole and the through hole of the sealing element and abuts against the switch, and a gap is formed between the key and the through hole.

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