CN213988675U

CN213988675U - Key assembly, key assembly structure and terminal equipment

Info

Publication number: CN213988675U
Application number: CN202120012868.9U
Authority: CN
Inventors: 谭勇洋
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2021-01-05
Filing date: 2021-01-05
Publication date: 2021-08-17
Anticipated expiration: 2031-01-05

Abstract

The utility model relates to an electronic equipment field specifically provides a button subassembly, button assembly structure and terminal equipment, and the button subassembly includes: the pressing structure is arranged at one end of the body, and the first limiting structure is arranged at the other end opposite to the one end; the pressing structure is suitable for exerting acting force for driving the body to move towards a first direction, the first limiting structure is suitable for being matched with an assembly part of the terminal equipment so as to limit the body to move towards a second direction at a limiting position, and the first direction is opposite to the second direction; and the annular elastic body sealing ring is sleeved on the body between the pressing structure and the first limiting structure, a second limiting structure is arranged on the body, and the second limiting structure is abutted against the sealing ring so as to limit the sealing ring to move towards the second direction relative to the body. The waterproof sealing performance of the button assembly is better, and the waterproof and dustproof grade of the equipment buttons is improved.

Description

Key assembly, key assembly structure and terminal equipment

Technical Field

The disclosure relates to the field of electronic equipment, in particular to a key assembly, a key assembly structure and terminal equipment.

Background

At present, most intelligent terminals are provided with physical keys of a mechanical structure, and the pressure of fingers of a user is transmitted through the mechanical structure, so that key contacts are conducted to realize key functions, such as a power key and a volume key of a side frame of a common intelligent mobile phone. With the development of the intelligent terminal, the waterproof performance is one of important indexes for evaluating the intelligent terminal, so how to improve the waterproof capability of the physical key is an important research direction for improving the waterproof performance of the terminal.

SUMMERY OF THE UTILITY MODEL

In order to improve the waterproof performance of the terminal key, the embodiment of the disclosure provides a key assembly, a key assembly structure and a terminal device.

In a first aspect, an embodiment of the present disclosure provides a key assembly applied to a terminal device, where the key assembly includes:

the pressing structure is arranged at one end of the body, and the first limiting structure is arranged at the other end opposite to the one end; the pressing structure is suitable for exerting acting force for driving the body to move towards a first direction, the first limiting structure is suitable for being matched with the assembly part of the terminal equipment so as to limit the body to move towards a second direction at a limiting position, and the first direction is opposite to the second direction; and

the annular elastic body sealing ring is sleeved on the body between the pressing structure and the first limiting structure, a second limiting structure is arranged on the body, and the second limiting structure is abutted to the sealing ring to limit the sealing ring to slide towards the second direction relative to the body.

In some embodiments, the seal ring includes a constricted portion and an abutting portion, the abutting portion is adapted to be in interference fit with the fitting, and the constricted portion is at least one constricted groove formed in an outer wall of the seal ring and surrounding a circumference of the seal ring.

In some embodiments, the second limiting structure is a stepped structure provided on the body, and a stepped surface of the stepped structure abuts against an end surface of the sealing ring.

In some embodiments, the apparatus further comprises a press resilient structure for providing a resilient force urging the body towards the second direction.

In some embodiments, the press resilient structure includes an elastic member and a gasket, the elastic member is sleeved on the body, one end of the elastic member abuts against the body, the other end of the elastic member abuts against the gasket, and the gasket abuts against an end surface of the sealing ring.

In some embodiments, the first limiting structure is an elastic limiting buckle integrally formed on the body, the elastic limiting buckle comprises an elastic buckle and a deformation groove, and the elastic buckle is suitable for being elastically deformed towards the deformation groove under the action of external force so as to reduce the size of the elastic limiting buckle.

In some embodiments, the body has a cylindrical structure, and the pressing portion has a cylindrical structure integrally formed at an axial end of the body.

In a second aspect, an embodiment of the present disclosure provides a key assembly structure, including:

the assembly part is provided with a through assembly hole, and the inner wall of the assembly hole is provided with a first step; and

the key assembly according to any one of the first aspect to any one of the embodiments is disposed through the assembly hole, and the first limit structure abuts against the assembly member to limit the body from moving in the second direction at a limit position; in the radial direction of the assembly hole, the sealing ring is in interference fit butt with the assembly hole, and in the axial direction of the assembly hole, the distance between the second limiting structure and the first step is smaller than the axial length of the sealing ring.

In some embodiments, the key assembly structure further includes:

and the key contact end is arranged in the assembly part and is abutted against the other end part of the body.

In a third aspect, an embodiment of the present disclosure provides a terminal device, including:

the shell comprises a bottom shell and a frame; and

the key assembly structure according to any one of the embodiments of the second aspect, wherein the assembly member is the bezel, and the key assembly structure is disposed on the bezel.

The button subassembly of this disclosed embodiment, including body and sealing washer, the one end of body is equipped with presses the structure, and the other end is equipped with first limit structure, presses the structure and is suitable for and is used for applying the effort that the user pressed to the drive body removes towards first direction. The first limiting structure is matched with the assembly part so as to limit the body to move towards the second direction. The sealing ring is an annular elastic body sealing ring, the sealing ring is sleeved on the body, a second limiting structure is arranged on the body, and the second limiting structure is abutted to the sealing ring so as to limit the sealing ring to slide towards a second direction relative to the body. Thereby when the key-press component is assembled, extrude the sealing washer through second limit structure for elastic deformation takes place for the sealing washer, thereby improves the interference ability between sealing washer and the assembly part, improves waterproof performance. And, when the button subassembly receives the exogenic action to press, the button further extrudees the sealing washer and takes place elastic deformation, improves waterproof performance on the one hand, and on the other hand the button overcomes the elastic force of sealing washer, and the reinforcing is pressed the damping and is felt, improves the button and feels. Simultaneously, the button is at the assembly back, and the body receives the elastic force effect of sealing washer, and the assembly is more firm, avoids the button slope not hard up.

The utility model provides a button subassembly, sealing washer include shrink portion and butt portion, butt portion and assembly part interference fit, and the shrink portion is for offering on the sealing washer outer wall and surrounding at least one shrink groove of sealing washer a week. Reduce the body through the shrink groove and press the in-process, the extrusion sealing washer leads to the inside stress that produces of sealing washer, promotes on the one hand and presses down and feel, and a plurality of butt portions that on the other hand formed form the interference fit structure of multilevel, improve water-proof effects.

This button subassembly of this disclosure embodiment still includes presses the resilience structure, and the resilience structure provides the elastic force who orders about the body and remove towards the second direction to effective supplementary button is kick-backed. And press the elastic component and the gasket that kick-back structure located the body including the cover, provide even elastic force to the body in each position through the elastic component, effectively prevent the button pressing with kick-back in-process the virtual position problem of slope appear.

The key assembly of the embodiment of the present disclosure, first limit structure is the spacing buckle of integrated into one piece's elasticity, and the spacing buckle of elasticity includes that elasticity is detained and the deformation groove, and elasticity is detained towards deformation groove elastic deformation under the exogenic action to reduce the chi footpath of the spacing buckle of elasticity. Thereby need not to set up spacing snap ring etc. through the integral type structure, simplify the subassembly structure to the assembly of being convenient for of elastic buckle simplifies the assembly operation.

The key assembly of the embodiment of the present disclosure, the body is a cylinder structure, presses the portion of pressing to be integrated into one piece in the cylinder structure of body axle head, through setting up the button structure of cylinder, compares in rectangular shape button, effectively reduces the trompil length on the assembly part, improves the structural strength of assembly part to avoid the key slope virtual position scheduling problem.

The key assembly structure and the terminal device in the embodiments of the present disclosure include the key assembly in any one of the embodiments, and therefore, the key assembly structure and the terminal device have the beneficial effects, which are not described herein again.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is an exploded view of a key assembly structure according to some embodiments of the present disclosure.

Fig. 2 is a schematic structural view of a body according to some embodiments of the present disclosure.

FIG. 3 is a schematic diagram of a seal ring according to some embodiments of the present disclosure.

Fig. 4 is an assembly cross-sectional view of a key assembly structure according to some embodiments of the present disclosure.

Description of reference numerals:

100-body; 110-a pressing structure; 120-a first limit structure; 121-elastic buckle; 122-a deformation slot; 130-a second limit structure; 200-sealing ring; 210-a constriction; 220-an abutment; 310-an elastomer; 320-a gasket; 400-an assembly member; 410-assembly holes; 411 — first step; 412-a second step; 500-key contact end.

Detailed Description

The technical solutions of the present disclosure will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments of the present disclosure, but not all embodiments. All other embodiments, which can be derived by one of ordinary skill in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure. In addition, technical features involved in different embodiments of the present disclosure described below may be combined with each other as long as they do not conflict with each other.

At present, most intelligent terminals have physical keys with mechanical structures, such as a power key and a volume key on a smart phone; as another example, function keys on the smart wearable device; and the like. The mechanical physical key is formed by pressing a key structure by a user, so that a DOME contact on a pcb of the device is conducted to realize a key function. Taking a smart phone as an example, a power key and a volume key are arranged on a side frame of a general smart phone, and a key structure is assembled in a key hole to realize the assembly of the key by forming the key hole on the frame.

Along with the continuous promotion of terminal equipment dustproof and waterproof grade demand, in order to realize the waterproof sealing nature of button structure, among the correlation technique, often realize waterproof sealing through setting up the sealing washer between button and key hole. However, in the key structure of the related art, the interference effect of the sealing ring and the parts is limited, the waterproof performance is general, and along with the long-time pressing and rebounding of the key, the sealing ring is easy to loose axially and even slip, so that the sealing performance is greatly reduced.

In order to solve the above-mentioned drawbacks in the related art, embodiments of the present disclosure provide a key assembly. The key assembly of the embodiment of the present disclosure may be applied to a terminal device, and the terminal device may be any device suitable for implementation, for example, a terminal such as a smart phone, a tablet computer, a PDA (Personal Digital Assistant), and the like; as another example, wearable devices such as smartwatches, smartbands, headsets, etc.; and the like. The present disclosure is not so limited.

In some embodiments, a key assembly of the present disclosure includes a body and a sealing ring. The body is the major structure of button, and one end is equipped with presses the structure, and the opposite other tip is equipped with first limit structure. The pressing structure is a pressing part of the key assembly and is suitable for fingers of a user to apply acting force for driving the body to move towards a first direction, and the first direction is the pressing direction of the key assembly. First limit structure is used for restricting the position that the body kick-backed, and its assembly part cooperation with terminal equipment to prevent that the body from deviating from when moving towards the second direction, the second direction is the rebound direction of key assembly promptly.

It should be noted that, for a conventional mechanical key, the basic principle is to make a DOME contact (also called "key contact") on a pcb conductive by pressing the key, and after a user releases an applied force, the key contact provides a resilient force to the key, so that the key is reset, that is, the key contact itself provides a resilient force to drive the key to reset.

In an embodiment of the present disclosure, the seal ring is an annular elastomeric seal ring. It is understood that "annular" means that the axial cross section of the sealing ring is a closed ring structure, which is not limited to a circular ring, but may be a ring with any other shape, such as a rectangular ring, an oblong ring, etc., and the shape of the sealing ring can be adapted according to the shape of the body. The "elastomer" means that the sealing ring is made of elastomer material, such as silica gel, rubber, etc., and has the capability of generating elastic deformation under the action of external force. It will be understood by those skilled in the art that the present disclosure is not described in detail.

The inner ring of the sealing ring can be in interference fit with the body so as to be sleeved on the body, and the outer ring of the sealing ring is used for being in interference fit with the inner wall of the assembling hole. Still be equipped with second limit structure on the body, second limit structure is used for with the sealing washer butt to the restriction sealing washer slides towards the second direction for the body.

It is understood that the first direction refers to a moving direction of the body by an external force, and the second direction refers to a direction opposite to the first direction. When external force presses the body, the body is urged to move towards the first direction under the external force, and the sealing washer has the trend of moving towards the second direction for the body because of interfering with the interference of assembly part, and second limit structure and sealing washer butt restrict the sealing washer all the time and remove to still further extrusion sealing washer takes place elastic deformation at the in-process of pressing. This is described in detail below with reference to specific embodiments, which are not described in detail herein.

According to the key assembly, after the key assembly is assembled with the assembly part, the sealing ring is extruded through the second limiting structure, so that the sealing ring is elastically deformed, interference capacity between the sealing ring and the assembly part is improved, and waterproof sealing performance is improved. And, when the button subassembly receives the exogenic action to press, the body further extrudees the sealing washer and takes place elastic deformation, improves waterproof performance on the one hand, and the elastic force of sealing washer is overcome to the on the other hand body, and the damping sense is pressed in the reinforcing, improves the button and feels. Simultaneously, the button is at the assembly back, and the body receives the elastic force effect of sealing washer, and the assembly is more firm, avoids the button slope not hard up.

Fig. 1 to 4 show a specific embodiment of the key assembly and the key assembly structure of the present disclosure, and the following description is made in detail with reference to fig. 1 to 4.

As shown in fig. 1, in the present embodiment, the key assembly includes a body 100 and a seal ring 200. The main body 100 is a main structure of the key, in the present embodiment, the main body 100 is a cylindrical structure, one side axial end of which is provided with a pressing structure 110, and the pressing structure 110 is a pressing part of the key, and is suitable for a user's finger or the like to apply an acting force on an end surface of the pressing structure 110.

In the present embodiment, the pressing structure 110 is a cylinder structure integrally formed at the axial end of the body 100 and coaxial with the body 100, that is, the key is a circular key. Of course, those skilled in the art will understand that in other embodiments, the pressing structure 110 may be provided as a separate connecting structure with the body 100, and the pressing structure 110 may also be in other shapes suitable for implementation, which is not limited by the present disclosure.

It should be noted that, in the present embodiment, the key assembly is of a cylindrical structure as a whole, so that the assembly hole 410 on the assembly member 400 is a circular through hole, and compared with a long hole, the length of the opening is reduced, and the structural strength of the assembly member 400 can be effectively improved.

As shown in fig. 2, the other axial end of the body 100 is provided with a first limiting structure 120, and the first limiting structure 120 is used for cooperating with the assembly member 400, so as to axially limit the body 100 and prevent the body 100 from coming out of the assembly hole 410.

In this embodiment, first limit structure 120 is the spacing buckle of integrated into one piece in the elasticity of body 100 axle head, the spacing buckle of elasticity includes elasticity and detains 121 and deformation groove 122, elasticity is detained 121 and is the wedge structure, thereby when body 100 is in the assembly of pilot hole 410, under the exogenic action, the wedge-shaped elasticity of inner wall extrusion of pilot hole 410 is detained 121, elasticity is detained 121 and takes place elastic deformation towards deformation groove 122, thereby reduce the chi footpath of the spacing buckle of elasticity, make body 100 run through the assembly in pilot hole 410, after running through, pilot hole 410 disappears the effort of elasticity knot 121, elasticity is detained 121 and is resumeed former dress, the chi footpath grow, it is spacing to form interference with pilot hole 410 in the axial.

It is understood that the first limit stop structure 120 is only an example, and those skilled in the art will understand that in other embodiments, the first limit stop structure 120 may also be implemented in any other implementation manner suitable for implementation, for example, a separate limit snap ring, a limit pin, etc., which is not enumerated in the present disclosure.

It should be noted that, in the present embodiment, the first limiting structure 120 employs an integrally formed elastic limiting buckle, and a limiting snap ring and the like are not required to be added, so as to simplify the assembly structure, facilitate assembly, and simplify the assembly operation.

At least one inventive concept of the disclosed embodiments resides in: the second stopper 130 is provided on the body 100, and the second stopper 130 abuts against the seal ring 200 to restrict the seal ring 200 from moving in the second direction.

For convenience of description, as shown in fig. 1 and 2, a direction from left to right in the drawing is defined as a first direction a, and a direction from right to left in the drawing is defined as a second direction b, that is, the first direction a represents a moving direction when the body 100 is pressed by an external force, the second direction b represents a moving direction when the body 100 rebounds, and the first direction a and the second direction b are opposite directions.

With reference to fig. 2, in the present embodiment, the second position-limiting structure 130 is a stepped structure provided on the body 100, that is, a shoulder is provided on an axial surface of the body 100 to form a step shape. The sealing ring 200 is sleeved on the body 100 between the second limiting structure 130 and the first limiting structure 120, and a stepped surface of the stepped structure of the second limiting structure 130 abuts against one side end surface of the sealing ring 200. Therefore, when the body 100 is pressed or rebounded by an external force, the second stopper 130 always forms an axial interference with the seal ring 200, and restricts the seal ring 200 from moving in the second direction b relative to the body 100.

For further understanding, the principles of the inventive concept will be described below in connection with the assembled configuration shown in fig. 4.

As shown in fig. 4, the assembly member 400 is provided with an assembly hole 410, and a first step 411 is provided on an inner wall of the assembly hole 410. When the key assembly is assembled, the sealing ring 200 is firstly sleeved on the body 100, and one side end surface of the sealing ring 200 abuts against the stepped surface of the second limiting structure 130, and then the body 100 is assembled in the assembling hole 410 in a penetrating manner, and the assembled structure is as shown in fig. 4. It can be seen that, in the assembled key structure, in the radial direction, the inner ring of the seal ring 200 is in interference fit with the body, and the outer ring of the seal ring 200 is in interference fit with the inner wall of the assembly hole 410. In the axial direction, one end surface of the seal ring 200 abuts against the step surface of the second stopper structure 130, and the other end surface abuts against the step surface of the first step 411 of the fitting hole 410, thereby forming interference at both axial sides.

In this embodiment, in a direction parallel to the axial direction of the assembly hole 410, a distance between the second limiting structure 130 and the first step 411 is smaller than the axial length of the sealing ring 200, so that after the key assembly is assembled in place, the sealing ring 200 is elastically deformed by being squeezed by two axial sides, that is, the sealing ring 200 is always in a compressed state.

The axial compression of the seal ring 200 in this at least one inventive concept has several beneficial effects simultaneously, as explained below:

1) because the sealing washer 200 is in the atress compression state, consequently not only increase the radial leakproofness between sealing washer 200 and the pilot hole 410 inner wall, improve the axial leakproofness between the ladder face of sealing washer 200 and first step 411 simultaneously, it is better to compare traditional interference fit's sealing effect, also can realize higher level dustproof and waterproof.

2) Because the axial of second limit structure 130 and sealing washer 200 is spacing to pressing body 100 and moving towards first direction, need further compress sealing washer 200, overcoming sealing washer 200 elastic force, reinforcing user presses the damping and feels, compare traditional mechanical button, have better pressing and feel.

3) In the conventional key structure, since the seal ring 200 and the body 100 do not have axial limitation therebetween, when the body 100 moves axially, the seal ring 200 and the body 100 easily move relatively, and the seal ring 200 is easily loosened or even dropped off after long-term use. In the embodiment, the second limiting structure 130 limits the axial movement of the sealing ring 200, so that the problem is completely avoided, and the waterproof performance of the key is ensured after long-term use.

4) Because the sealing ring 200 is in a compression state, the sealing ring 200 applies uniform elastic force to the body through the second limiting structure 130, so that the body 100 is assembled more firmly, the problem of inclination looseness is avoided, and the user experience is improved.

It can be seen that the key assembly of the present disclosure has the above-mentioned advantages under at least one of the present inventive concepts.

On the basis of the inventive concept, considering that the internal stress of the sealing ring 200 is large in a compressed state, on one hand, a user has strong damping feeling during pressing and is relatively hard, and on the other hand, the internal stress is too large, so that the sealing ring 200 is compressed for a long time to cause flexible deformation, and the sealing effect is weakened. Therefore, in the present embodiment, the structure of the seal ring 200 is further improved to solve the above-described problem. This is explained in detail below with reference to fig. 3 and 4.

As shown in fig. 3, the sealing ring 200 includes a contracting portion 210 and an abutting portion 220, as shown in fig. 4, the abutting portion 220 has a radial dimension suitable for interference fit with the inner wall of the fitting hole 410, and the contracting portion 210 is formed by at least one contracting groove which is opened on the outer wall of the sealing ring 200 and surrounds the outer wall of the sealing ring 200 for one circle, that is, the contracting portion 210 makes the wall thickness of the sealing ring 200 thinner. In the present embodiment, two contact portions 220 are formed by opening one constricted portion 210 at the middle in the axial direction of the seal ring 200. In other embodiments, the number of the constrictions 210 may be other, such as 2, 3, etc., and the disclosure need not be limited thereto.

Continuing to refer to fig. 4, when sealing washer 200 received second limit structure 130 and first step 411 compression to take place elastic deformation, because shrink portion 210 position has the shrink space to sealing washer 200 takes place deformation towards the position of shrink portion 210, and the elimination partial stress promotes on the one hand and presses down and feels, avoids the flexible deformation that sealing washer 200 stress is too big to lead to, and the interference fit structure of the multistage of a plurality of butt portions 220 of on the other hand and pilot hole 410 inner wall formation improves waterproof sealing effect.

The key assembly of the embodiment of the present disclosure further includes a press resilience structure, and the press resilience structure is used for providing an elastic force for driving the body 100 to reset.

As shown in fig. 1, in the present embodiment, the pressing resilient structure includes an elastic member 310 and a pad 320, and in the example of fig. 1, the elastic member 310 is a spring, which is sleeved on the body 100, and has one end abutting against the pressing structure 110 and the other end lower than the pad 320. The gasket 320 is disposed on the body 100, and has one end surface abutting against the elastic member 310 and the other end surface abutting against the end surface of the sealing ring 200.

As shown in fig. 4, when the user presses the body 100 to move toward the first direction a, the elastic member 310 compresses to generate elastic deformation, and when the external force applied by the user disappears, the elastic force of the elastic member 310 drives the body 100 to rebound and reset.

According to the above, in the embodiment, the press key is effectively assisted to rebound through pressing the rebound structure, the occurrence of key virtual positions is avoided, the elastic piece provides uniform elastic force on each position of the body, the problem of inclination of the press key in the pressing and rebounding process is prevented, and the rebound of the press key is more stable.

It is noted that, as shown in fig. 4, in order to assemble the pressing structure 110 and the press-spring-back structure, the assembly hole 410 of the assembly member 400 is further provided with a second step 412. As can be seen from the foregoing, the pressing resilient structure is used to assist the body to return, so that it is not limited to the structure shown in fig. 4, for example, in other embodiments, the pressing resilient structure may also abut against the second step 412, and may also provide the elastic force for returning; the elastic member 310 is not limited to a spring, and may be an elastic member such as a disc spring; the gasket 320 is not required to be arranged, and the rebound can be realized only by the elastic piece 310; and the like. Those skilled in the art will appreciate that this disclosure is not exhaustive with respect to these alternative embodiments.

The structure of the key assembly according to the present embodiment is explained above, and the assembly and principle of the key assembly structure will be explained in detail with reference to fig. 1 and 4.

As shown in fig. 1, the assembly structure includes an assembly member 400, and the assembly member 400 may be, for example, a side frame of a smart phone, and has an assembly hole 410 formed therein. The key contact end 500 is disposed on the inner side of the housing of the assembly 400, and the key contact end 500 is a functional module of a key, which is referred to by those skilled in the art and will not be described herein.

Firstly, the key assembly is assembled, the elastic member 310 and the gasket 320 are sequentially sleeved on the body 100, and then the sealing ring 200 is sleeved to the position abutting against the second limiting structure 130. The inner ring of the gasket 320 can be in sliding fit with the body 100, and the inner ring of the sealing ring 200 is in interference fit with the body 100.

Secondly assemble the button subassembly after the assembly to the pilot hole 410 in, exert the power of ordering about the button subassembly towards first direction a motion, the wedge face and the first step 411 butt of detaining 121 as elasticity, under the extrusion force effect, elasticity is detained 121 and is taken place deformation towards deformation groove 122 to reduce the chi footpath of the spacing buckle of elasticity, detain 121 as elasticity and wear out pilot hole 410 completely, it is spacing that the elasticity is detained 121 reconversion formation axial, a side end face and the contact of button contact end 500 contact of body simultaneously.

In the assembly process of the key assembly, one side end face of the sealing ring 200 abuts against the first step 411, the other side end face abuts against the second limiting structure 130 to form limiting of two axial sides, so that after the key assembly is assembled in place, the sealing ring 200 is in a compression state, the abutting portion 220 of the sealing ring abuts against the inner wall of the assembling hole 410 in an interference fit mode, and under the action of axial acting force, the abutting portions 220 of the two sides elastically deform towards the middle contraction portion 210.

As shown in fig. 4, when a user applies a force to the pressing structure 110, the body 100 moves toward the first direction a, the pressing structure 110 compresses the elastic member 310, and the second limiting structure 130 further compresses the sealing ring 200, so that the key contact end 500 is triggered to be turned on. When the acting force applied by the user disappears, the elastic member 310 drives the body 100 to move toward the second direction a, the sealing ring 200 is reset to the assembly state until the first limiting structure 120 and the assembly hole 410 form a limiting position, and the key assembly is rebounded and reset.

The aforesaid combines concrete embodiment, the concrete structure and the principle to this disclosure button subassembly and button assembly structure have carried out detailed description, can know through the aforesaid, the button subassembly and button assembly structure of this disclosure scheme have better waterproof sealing nature and button and feel, adopt circular button design simultaneously, avoid offering rectangular hole to the assembly part and improve structural strength, and utilize the supplementary button of button resilience structure to reset, avoid the key slope virtual position and not hard up scheduling problem, and utilize integrated into one piece's the spacing buckle of elasticity, simplify the subassembly structure, the assembly of being convenient for.

On the other hand, the embodiment of the present disclosure further provides a terminal device, where the terminal device includes the key assembly or the key assembly structure in any of the above embodiments. Those skilled in the art will appreciate that the terminal device may be any type of device suitable for implementation, for example, a terminal such as a smartphone, a tablet, a PDA (Personal Digital Assistant), etc.; as another example, wearable devices such as smartwatches, smartbands, headsets, etc.; and the like. The present disclosure is not so limited.

In an exemplary implementation, the terminal device is exemplified by a smart phone, the terminal device includes a housing, the housing includes a bottom shell and a frame of the smart phone, and the key assembly structure is disposed on the frame of the smart phone, for example, the key assembly structure can be used as a power key and/or a volume key of the smart phone. Those skilled in the art can implement the solution of the present embodiment by combining the foregoing descriptions, and thus, the detailed description is omitted here.

As can be seen from the above, the terminal device of the present embodiment includes the key assembly and the key assembly structure, so that the terminal device has the corresponding beneficial effects as described above, and further description thereof is omitted.

It should be understood that the above embodiments are only examples for clearly illustrating the present invention, and are not intended to limit the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the present disclosure may be made without departing from the scope of the present disclosure.

Claims

1. A key assembly, applied to a terminal device, the key assembly comprising:

the annular elastic body sealing ring is sleeved on the body between the pressing structure and the first limiting structure, a second limiting structure is arranged on the body, and the second limiting structure is abutted to the sealing ring to limit the sealing ring to move towards the second direction relative to the body.

2. The key assembly of claim 1,

the sealing washer includes shrink portion and butt portion, butt portion be suitable for with assembly part interference fit, the shrink portion is for offering on the sealing washer outer wall, and encircle at least one shrink groove of sealing washer a week.

3. The key assembly of claim 1,

the second limit structure is arranged on the stepped structure of the body, and the stepped surface of the stepped structure is abutted to the end surface of the sealing ring.

4. The key assembly of claim 1,

the pressing rebound structure is used for providing elastic force for driving the body to move towards the second direction.

5. The key assembly of claim 4,

the pressing resilience structure comprises an elastic piece and a gasket, wherein the elastic piece and the gasket are sleeved on the body, one end of the elastic piece abuts against the body, the other end of the elastic piece abuts against the gasket, and the gasket abuts against the end face of the sealing ring.

6. The key assembly of claim 1,

first limit structure be integrated into one piece in the spacing buckle of elasticity of body, the spacing buckle of elasticity includes that elasticity is detained and the deformation groove, elasticity is detained and is suitable for orientation under the exogenic action the deformation groove takes place elastic deformation, in order to reduce the chi footpath of the spacing buckle of elasticity.

7. The key assembly of claim 1,

the body is of a cylindrical structure, and the pressing structure is of a cylindrical structure integrally formed at the shaft end of the body.

8. A key assembly structure, comprising:

the key assembly according to any one of claims 1 to 7, which is disposed through the mounting hole, wherein the first limiting structure abuts against the mounting member to limit the body from moving in the second direction at a limiting position; in the radial direction of the assembly hole, the sealing ring is in interference fit butt with the assembly hole, and in the axial direction of the assembly hole, the distance between the second limiting structure and the first step is smaller than the axial length of the sealing ring.

9. The key assembly structure of claim 8, further comprising:

10. A terminal device, comprising:

the shell comprises a bottom shell and a frame; and

the key assembly structure according to claim 8 or 9, wherein the assembly member is the bezel, and the key assembly structure is provided on the bezel.