CN216054387U - Key structure and terminal - Google Patents

Abstract

The application provides a key structure and a terminal, wherein the key structure comprises a key cap and a switch component, the key cap penetrates through an installation cavity, the key cap is provided with a first limiting groove, and the key cap can move between a first position and a second position in the installation cavity; the switch assembly is positioned in the accommodating cavity and comprises a control circuit board and a reinforcing structural part, the reinforcing structural part comprises a reinforcing part, a connecting part and a limiting part, the control circuit board is connected with the reinforcing part and is provided with a switch contact, the connecting part is connected with the reinforcing part and the limiting part, and the limiting part and the reinforcing part are spaced and inserted in the first limiting groove; when the keycap moves to the first position, the limiting part is used for limiting the keycap to move away from the switch contact, and when the keycap moves from the first position to the second position, the keycap presses the switch contact. This button structure has realized the spacing to the key cap through the grafting of spacing portion with first spacing groove, and the shell also need not correspond and offers the through-hole, has increased structural rigidity, has improved the structural stability of shell.

Description

Key structure and terminal

Technical Field

The application relates to the field of mobile terminals, in particular to a key structure and a terminal.

Background

For the convenience of user operation, mobile terminals such as mobile phones on the market generally set up the button structure in mobile terminal's shell side, and this button structure need set up other structures on the key cap in order to guarantee to accomplish with the shell equipment that the key cap does not drop, and the draw-in groove is seted up to adaptability on the shell to cooperate with the structure on the key cap, thereby carry out spacingly to the key cap, and this will lead to the side grooving of shell more, and shell rigidity descends.

Disclosure of Invention

The application provides a button structure and terminal has solved among the prior art for carrying out the too much problem that influences the shell rigidity of spacing grooving on the shell to the key cap.

In order to achieve the purpose, the technical scheme is as follows:

in a first aspect, a key structure is installed on a housing, the housing has an accommodating cavity and an installation cavity, the installation cavity has a first opening and is through to the accommodating cavity, and the key structure includes:

the key cap penetrates through the installation cavity, a first limiting groove is formed in the key cap, and the key cap can move between the first position and the second position in the installation cavity;

the switch assembly is positioned in the accommodating cavity and comprises a control circuit board and a reinforcing structural part, the reinforcing structural part comprises a reinforcing part, a connecting part and a limiting part, the control circuit board is connected with the reinforcing part and is provided with a switch contact, the connecting part is connected with the reinforcing part and the limiting part, and the limiting part and the reinforcing part are spaced and inserted into the first limiting groove;

when the keycap moves to the first position, the limiting part is used for limiting the keycap to move away from the switch contact, and when the keycap moves from the first position to the second position, the keycap presses the switch contact.

Through adopting the above scheme, this button structure is through the cooperation of pegging graft of the first spacing groove of seting up on spacing portion and the key cap that extend on the reinforcement structure, realized spacing to the key cap, that is to say, this button structure has restricted the key cap to deviate from the installation cavity through the reinforcement structure, the key cap alright needn't realize spacingly through setting up the lug or the bolt of current button structure in the picture like this, the shell also needn't correspond the through-hole of seting up confession lug or bolt grafting, because the through-hole has been eliminated to the shell, structural rigidity has just also been increased in the shell that sets up the through-hole, the structural stability of shell has been improved, and simultaneously, when carrying out the viscose in order to realize waterproofly to the shell, owing to saved the through-hole, the increase of the area of contact of shell and viscose, thereby the water-proof effects of shell has been promoted. In addition, because the key cap is provided with the plug, the risk that the key cap is separated from the shell due to the fact that the plug is not in place due to the glue dispensing between the plug and the shell is avoided.

In one embodiment of the first aspect, the position-limiting portion defines a positioning groove, and the feeler lever has a narrow portion disposed at the position of the first position-limiting groove, and the narrow portion is inserted into the positioning groove.

By adopting the above scheme, the positioning groove limits the leftward, rightward and upward movement of the limiting part, thereby limiting the separation of the narrow part and the limiting part.

In one embodiment of the first aspect, the limiting portion includes an upper limiting claw, a left limiting claw and a right limiting claw, the upper limiting claw is connected to the connecting portion, the left limiting claw and the right limiting claw are both connected to a position below the upper limiting claw and are spaced apart from each other, and the upper limiting claw, the left limiting claw and the right limiting claw together enclose the positioning groove which is formed to penetrate through in the front-back direction and open downward.

Through adopting above-mentioned scheme, go up spacing claw, left spacing claw and right spacing claw and realized spacing to narrow portion three ascending in the side, can restrict the key cap jointly simultaneously and keep away from the switch module and remove, improved the spacing reliability of key cap.

In one embodiment of the first aspect, the reinforcing portion, the connecting portion, and the limiting portion are integrally formed.

By adopting the scheme, the structural stability of the reinforcing structural part is improved, and the processing of the reinforcing structural part is facilitated.

In one embodiment of the first aspect, the reinforcing portion and the connecting portion are integrally formed, and the limiting portion is provided with a flange connected to the connecting portion.

Through adopting above-mentioned scheme, can be with the preceding side cavity wall butt that is close to the installation cavity of spacing portion and holding chamber to play the supporting role to reinforcement portion, thereby restriction reinforcement portion and the rear side cavity wall separation in holding chamber, and restriction reinforcement structure takes place to rock in the holding intracavity, has improved switch assembly's structural stability. Simultaneously, connect in the holding intracavity back at the integrative piece that reinforcement portion and connecting portion formed, the position of spacing portion can be adjusted according to the length of the fore-and-aft direction in holding chamber to make spacing portion contradict with the preceding lateral cavity wall in holding chamber all the time, the suitability is strong.

In one embodiment of the first aspect, the reinforcing portion is connected to a cavity wall of the accommodating cavity far away from the mounting cavity, and the limiting portion is spaced from the cavity wall of the accommodating cavity near the mounting cavity.

Through adopting above-mentioned scheme, the portion of bending just can be dodged to the second opening in holding chamber to make the switch module insert the holding intracavity earlier through the second opening, the portion of bending also is located the holding intracavity this moment, so that the portion of bending cooperates with the joint in the rear side chamber wall in holding chamber.

In one embodiment of the first aspect, the reinforcing portion is connected to a cavity wall of the accommodating cavity, the cavity wall being far away from the mounting cavity, and the limiting portion is attached to the cavity wall of the accommodating cavity, the cavity wall being close to the mounting cavity.

Through adopting above-mentioned scheme, both sides chamber wall just can support reinforcement portion and spacing portion respectively around the holding chamber to restriction switch module back-and-forth movement, reinforcement portion all the time with the rear side chamber wall butt in holding chamber this moment, improved the stability of being connected in the rear side chamber wall in reinforcement portion and holding chamber.

In one embodiment of the first aspect, the reinforcing structure further includes a bending portion connected to the reinforcing portion, the extending direction of the bending portion is opposite to the extending direction of the connecting portion, and the bending portion is connected to the housing in a clamping manner.

Through adopting above-mentioned scheme, the joint cooperation of the portion of bending and shell has restricted the rocking of switch module in the holding intracavity.

In one embodiment of the first aspect, the key cap includes a key head and a feeler lever, the feeler lever is connected to a side of the key head facing the switch component and can abut against the switch contact, and the first limiting groove is opened on a peripheral side surface of the feeler lever.

Through adopting above-mentioned scheme, the area that the button head exposes outside the shell is great, has increased the area of pressing that the user pressed the key cap, and the setting up of feeler lever has not only realized the transmission of the overhead force of button, makes the aperture of connecting hole less moreover, has reduced the influence to shell structure rigidity.

In one embodiment of the first aspect, the contact lever includes a lever portion connected to the key head and a buffer portion connected to at least one side of the lever portion facing the switch contact, and the buffer portion has elasticity.

Through adopting above-mentioned scheme, the buffer portion is compared in setting up of current button structure conducting base and is more close to the key cap rear side, consequently liquid should not touch the buffer portion when liquid infiltration mounting groove, has reduced the buffer portion and has received the possibility of soaking to reduced the swelling risk, just also reduced the risk of key cap to the pressure increase of switch module, ensured the sensitivity of button structure, improved the life of button structure.

In one embodiment of the first aspect, the buffer portion is sleeved to the rod portion.

Through adopting above-mentioned scheme, increased the area of contact of buffer portion with pole portion, increased the frictional force between buffer portion and the pole portion, the high-speed joint of buffer portion and pole portion of not only being convenient for to can restrict the separation of buffer portion and pole portion.

In one embodiment of the first aspect, a connection groove is formed in a side of the lever portion facing the switch contact, and a boss is convexly formed on a side of the buffer portion facing the lever portion and is inserted into the connection groove.

Through adopting above-mentioned scheme, the grafting cooperation of boss and spread groove has improved the stability of being connected of buffer portion and pole portion.

In one embodiment of the first aspect, the key structure further includes a waterproof ring, and the waterproof ring is sleeved on the keycap and elastically abuts against a cavity wall of the installation cavity.

Through adopting above-mentioned scheme, prevent that outside liquid from getting into the holding intracavity.

In one embodiment of the first aspect, the waterproof ring is formed on the trolley.

By adopting the scheme, the torsion of the waterproof ring caused by the friction force of the hole wall of the connecting hole in the movement process is reduced.

In one embodiment of the first aspect, the keycap ring is provided with a second limiting groove, the second limiting groove is located on one side of the first limiting groove far away from the switch contact, and the waterproof ring is sleeved in the second limiting groove.

Through adopting above-mentioned scheme, the cell wall of second spacing groove can restrict the displacement of waterproof ring.

In a second aspect, a terminal is provided, which includes a housing and at least one of the above-mentioned key structures.

This terminal has improved the structural rigidity of shell through setting up above-mentioned button structure, can avoid the button to scurry the key simultaneously.

In one embodiment of the second aspect, the housing defines a receiving cavity and a mounting cavity having a first opening and communicating with the receiving cavity, the key cap is disposed through the mounting cavity, and the receiving cavity is used for receiving the switch assembly.

Through adopting above-mentioned scheme, the installation cavity has played spacing and guide effect to the key cap.

In one embodiment of the second aspect, the receiving cavity has a second opening, and the connecting portion is adjacent to the second opening.

Through adopting above-mentioned scheme, be convenient for the apron links to each other with connecting portion to be used for choosing switch module from the holding chamber through choosing connecting portion.

In one embodiment of the second aspect, the terminal further includes a cover plate connected to the housing and covering the second opening, and the cover plate is bonded to the connecting portion by a back adhesive or a fluid adhesive.

By adopting the scheme, the bonding area between the cover plate and the shell is increased, so that the cover plate and the shell are more firmly connected, and the risk of degumming is reduced.

In one embodiment of the second aspect, the key cap includes a key head and a contact rod, the contact rod is connected to a side of the key head facing the switch component, the mounting cavity includes a mounting groove opened in the housing and a connecting hole communicating the mounting groove with the accommodating cavity, the contact rod is inserted into the connecting hole, and at least a portion of the key head is accommodated in the mounting groove.

Through adopting above-mentioned scheme, the setting of mounting groove has acceptd partial button head in the direction of height of button head for the partial height of button head protrusion in the mounting groove reduces, thereby has reduced the probability that the button head is bumped by the user mistake, can keep the pleasing to the eye degree of outward appearance simultaneously. In addition, the slot bottom of the mounting slot can limit the keycap to move towards the switch assembly.

In one embodiment of the second aspect, a clamping groove is formed in a cavity wall of the accommodating cavity, the reinforcing structural member further includes a bending portion connected to the reinforcing portion, and the bending portion is in clamping fit with the clamping groove.

Through adopting above-mentioned scheme, the fixed connection with the shell is realized with the joint cooperation in joint groove to reinforcement structure accessible portion of bending.

Drawings

FIG. 1 is a partial cross-sectional view of one form of a presently relevant key structure;

FIG. 2 is a partial cross-sectional view of another version of a related key structure;

fig. 3 is a schematic structural diagram of a mobile terminal according to an embodiment of the present application;

fig. 4 is an exploded view of the mobile terminal of fig. 3;

FIG. 5 is a perspective view of a key cap according to an embodiment of the present disclosure;

fig. 6 is a partially cut-away perspective view of a mobile terminal provided in one embodiment of the present application;

fig. 7 is an enlarged view of a portion a in fig. 6;

FIG. 8 is a partial cutaway perspective view of a mobile terminal provided in another embodiment of the present application;

fig. 9 is an enlarged view of a portion B in fig. 8;

FIG. 10 is a partial cross-sectional view, in cross-section, of a mobile terminal as provided in one embodiment of the present application;

fig. 11 is a partial cross-sectional view, in cross-section, of a mobile terminal provided in another embodiment of the present application;

FIG. 12 is a partial cross-sectional view of another embodiment of a reinforced steel sheet provided in an example of the present application;

fig. 13 is a perspective structural view of a key structure provided in the embodiment of the present application;

fig. 14 is a perspective view of an integrated reinforced steel sheet according to an embodiment of the present disclosure;

fig. 15 is a partial cross-sectional view of a mobile terminal provided in an embodiment of the present application, in another cross-section;

fig. 16 is a perspective view of a key cap provided with a waterproof ring according to another embodiment according to an embodiment of the present application;

FIG. 17 is a cross-sectional view of a key cap provided in accordance with an embodiment of the present application;

FIG. 18 is a cross-sectional view of a key cap provided in accordance with another embodiment of the present application;

FIG. 19 is a cross-sectional view of a key cap provided in accordance with yet another embodiment of the present application.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "inside", "outside", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

In the embodiments of the present application, terms such as "first" and "second" are used to distinguish the same or similar items having substantially the same function and action. For example, the first limiting part and the second limiting part are only used for distinguishing different limiting parts, and the sequence of the first limiting part and the second limiting part is not limited. Those skilled in the art will appreciate that the terms "first," "second," etc. do not denote any order or quantity, nor do the terms "first," "second," etc. denote any order or importance.

It should be noted that the words "in one embodiment" or "for example" are used herein to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "in one embodiment" or "for example" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the phrases "in one embodiment" or "such as" are intended to present relevant concepts in a concrete fashion.

In this application, unless expressly stated or limited otherwise, the terms "connected" and "coupled" are to be construed broadly, as they may be, for example, fixedly coupled, detachably coupled, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments.

Referring to fig. 1, a related mobile terminal includes a housing 90 ' and a key structure 100 ', for example, a mobile phone, where the key structure 100 ' is installed on the mobile phone and is used for controlling the mobile phone or adjusting parameters of the mobile phone. The outer shell 90 'is provided with a mounting groove 902', an accommodating cavity 901 ', a connecting hole 903' and a through hole 904 ', the mounting groove 902' extends transversely, the connecting hole 903 'is arranged at the bottom of the mounting groove 902' and extends longitudinally, the connecting hole 903 'is communicated with the mounting groove 902' and the accommodating cavity 901 ', and the through hole 904' is arranged at the wall of the mounting groove 902 'and penetrates to the surface of the outer shell 90'. The conventional key structure 100 ' includes a key cap 10 ' and a switch assembly 20 ', the switch assembly 20 ' is disposed in the accommodating cavity 901 ', the key cap 10 ' includes a key head 11 ' and a contact rod 12 ', the key head 11 ' is disposed separately from the contact rod 12 ', the key head 11 ' extends transversely and is fitted into the mounting groove 902 ', the contact rod 12 ' extends longitudinally and is fitted into the connecting hole 903 ', the key head 11 ' is disposed in the mounting groove 902 ', the contact rod 12 ' is disposed in the connecting hole 903 ' and abuts against the switch assembly 20 ', when a user presses the key head 11 ', the key head 11 ' abuts against the contact rod 12 ', and then the contact rod 12 ' is pushed to move toward the accommodating cavity 901 ', and the contact rod 12 ' presses the switch assembly 20 ', so that the switch assembly 20 ' is activated. In order to limit the key head 11 'from coming out of the mounting groove 902', usually, two extending ends of the key head 11 'are respectively provided with a protrusion 111' protruding outward and laterally, the two protrusions 111 'respectively correspond to a through hole, one protrusion 111' can be inserted into the corresponding through hole to achieve the limiting, the other protrusion 111 'can be limited by the plug pin 91' disposed in the corresponding through hole, the specific operation is that the plug pin 91 'is retracted into the through hole 904', after the key head 11 'is mounted in the mounting groove 902', the plug pin 91 'is extended and inserted into the outer side of the notch of the protrusion 111' close to the mounting groove 902 ', and at this time, the plug pin 91' can limit the protrusion 111 'from moving outward of the mounting groove 902', so as to limit the key head 11 'from coming out of the mounting groove 902'. However, the arrangement of the through hole 904 ' on the housing 90 ' can reduce the structural rigidity of the housing 90 ', and meanwhile, when the housing 90 ' is glued to achieve waterproofing, the through hole 904 ' cannot be glued due to the arrangement of the through hole 904 ', so that the glued area of the housing 90 ' is reduced, and the waterproofing requirement cannot be met.

In the related art shown in the figure, in order to prevent the switch component 20 'from being damaged by pressure, the key cap 10' is generally provided with a conductive base 13 'between the contact rod 12' and the key head 11 ', specifically, a groove is formed on the rear side of the key head 11' facing the contact rod 12 ', the conductive base 13' is disposed in the groove, and the contact rod 12 'is abutted against the conductive base 13'. The conductive base 13 'is generally a plastic member and can undergo a certain elastic deformation, and when the user presses the key head 11', the conductive base 13 'has a certain buffering effect on the acting force applied to the touch rod 12', so that the acting force when the touch rod 12 'presses the switch assembly 20' is buffered. However, in the using process of the user, liquid may penetrate into the rear side of the mounting groove 904 and contact with the conductive base 13 ', and if the liquid is a liquid capable of swelling the conductive base 13', the conductive base 13 'may swell after being soaked by the liquid, and the volume of the swollen conductive base 13' becomes large, the contact rod 12 'is pushed to move towards the switch component 20', so that the switch component 20 'is damaged due to increased pressure, and the hand feeling and the function of the key structure 100' are both disabled. Meanwhile, when the key head 11 'is made of metal, the conductive base 13' is bonded with the key head 11 'through glue or back glue, the structural stability is poor, the risk of falling is likely to exist, if the conductive base 13' falls off or forgets to install, the conductive base needs to be repaired, the assembly process of the key structure 100 'is affected, and if the conductive base 13' falls off in the use process of a user, the stress on the key head 11 'can not be transmitted to the touch rod 12', the pressing of the touch rod 12 'on the switch component 20' is affected, and the user experience is further affected. In addition, the size of the cross section of the conductive base 13 ' needs to be larger than that of the contact rod 12 ' to ensure the contact rod 12 ' to be abutted against the conductive base 13 ', and simultaneously ensure that the contact rod 12 ' is over against the conductive base 13 ', so that the assembly deviation is reduced, and the influence on the pressing hand feeling when a user presses the keycap 10 ' is avoided. However, the larger cross section of the conductive base 13 ' will result in the larger cross section of the groove for accommodating the conductive base 13 ' on the key head 11 ', and because the overall structural stability of the key head 11 ' needs to be considered in the design, the size of the key head 11 ' also needs to be increased according to the design width of the touch bar 12 ' and the size of the groove, so that the width of the key head 11 ' is limited, and the widths of the touch bar 12 ' and the key head 11 ' cannot be adjusted at will. Meanwhile, when the key structure 100 'is applied to mobile terminals such as mobile phones, since the market is gradually pursuing lightness and thinness, if the key head 11' is set to be large, the user requirements cannot be met, and the user experience is affected.

In order to reduce the total number of through holes 904 ', referring to fig. 2, the key heads of a plurality of key caps 10' are generally connected into a whole, so that the plurality of key caps 10 'can share the integrated key head 11', and the integrated key head 11 'only needs to correspondingly form two through holes 904'. Taking two key caps 10 ', such as the volume-up key and the volume-down key, as an example, the two ends of the integrated key head 11 ' are respectively controlled by the rod 12 ' of the volume-up key and the rod 12 ' of the volume-down key, when the user presses one end of the integrated key head 11 ', the integrated key head 11 ' tilts towards the end to push the corresponding rod 12 ' of the end to move towards the switch assembly 20 ', so as to realize the activation of the switch assembly 20 '. However, when the user presses one end of the integrated key head 11 ', the other end of the integrated key head may be simultaneously driven to move toward the corresponding touch rod 12 ', and further, the user presses the corresponding touch rod 12 ' at the other end, so that there is a risk of key movement.

In addition, when the current switch component 20 ' needs to be disassembled, the reinforcing structural member 21 ' needs to be pried down from the rear side cavity wall of the accommodating cavity 901 ' first, so that the reinforcing structural member 21 ' is separated from the rear side cavity wall of the accommodating cavity 901 ' far away from the installation cavity 902 ', and then the switch component 20 ' is clamped out from the accommodating cavity 901 ' through the opening above the accommodating cavity 901 ' by using a clamping tool, so that the operation is complex and the disassembly is difficult.

Referring to fig. 3 and 4, taking a mobile phone as an example, the present application provides a mobile terminal, which includes a housing 90 and a key structure 100, where the key structure 100 is disposed in the housing 90, the housing 90 has a mounting cavity 902 and an accommodating cavity 901, the housing 90 may be a middle frame of the mobile phone, the accommodating cavity 901 is located inside the housing 90, and the mounting cavity 902 is provided with a first opening and is communicated to the accommodating cavity 901.

In the following embodiments, the direction from the mounting cavity 902 to the accommodating cavity 901 is backward, and the direction from the accommodating cavity 901 to the mounting cavity 902 is forward.

In the embodiment of the present application, the key structure 100 includes a key cap 10 and a switch assembly 20.

The key cap 10 is disposed in the mounting cavity 902, the switch component 20 is disposed in the accommodating cavity 901, the key cap 10 can move toward the switch component 20 in the mounting cavity 902 to move from the first position to the second position, when the key cap 10 is at the first position, the key cap 10 abuts against the switch component 20, when the key cap 10 moves to the second position, the switch component 20 is pressed, and at this time, the switch component 20 is started. In other embodiments, the key cap 10 is spaced from the switch assembly 20 when in the first position and presses the switch assembly 20 when in the second position. Referring to fig. 5, a first limiting groove 101 is formed on a side surface of the key cap 10, and the first limiting groove 101 may be a strip or a ring circumferentially disposed around the key cap 10. One first limiting groove 101 may be provided. It should be noted that the extending direction, shape, position and number of the first limiting grooves 101 are not limited, in other embodiments, there may be a plurality of first limiting grooves 101, and the first limiting grooves 101 may not extend along the circumferential direction of the trolley bar 12.

Referring to fig. 6, the switch assembly 20 includes a control circuit board 22 and a reinforcing structure 21.

The reinforcing structure 21 is used to enhance the structural rigidity of the control circuit board 22 to prevent the control circuit board 22 from bending. Reinforcing structure 21 includes reinforcement portion 211, connecting portion 212 and spacing portion 213 that connect gradually, and reinforcement portion 211 connects in the rear side cavity wall that installation cavity 902 was kept away from in holding chamber 901, and connecting portion 212 connects reinforcement portion 211 and spacing portion 213, and spacing portion 213 is located reinforcement portion 211 towards the front side of installation cavity 902 and with reinforcement portion 211 looks interval. At this time, the limiting portion 213, the connecting portion 212 and the reinforcing portion 211 may form a U-shaped, C-shaped or hook-shaped structure together, the control circuit board 22 is installed on one side of the reinforcing portion 211 facing the limiting portion 213, the control circuit board 22 may be a flexible circuit board, and the reinforcing portion 211 is used for supporting the control circuit board 22. The control circuit board 22 is provided with a switch contact 221, the switch contact 221 faces the limiting portion 213, the limiting portion 213 is spaced from the switch contact 221, the limiting portion 213 is inserted into the first limiting groove 101, that is, the limiting portion 213 can extend into the first limiting groove 101. When the key cap 10 is at the first position, the position-limiting portion 213 is used to limit the movement of the key cap 10 away from the switch contact 221, and the key cap 10 can abut against the switch contact 221. When the key cap 10 is pressed backward by an external force, the key cap 10 moves from the first position to the second position, the key cap 10 moves relative to the position-limiting portion 213, and presses the switch contact 221, so that the switch assembly 20 is started, and the first position-limiting groove 101 provides a moving space for the position-limiting portion 213. When the external force is removed, the switch contact 221 bounces and applies a reverse force to the key cap 10, so that the key cap 10 moves from the second position to the first position, and the limiting portion 213 can finally limit the key cap 10 at the first position, thereby limiting the key cap 10 from being removed from the mounting cavity 902.

The key structure 100 realizes the limit of the key cap 10 by inserting and matching the limit part 213 extending from the reinforcing structural member 21 with the first limit groove 101 formed on the key cap 10, that is, the key structure 100 limits the key cap 10 from being released from the installation cavity 902 through the reinforcing structural member 21, therefore, the key cap 10 does not need to be limited by the protrusion 111 'or the plug 91' of the current key structure 100 'in fig. 1, the shell 90 does not need to be correspondingly provided with the through hole 904' for the insertion of the protrusion 111 'or the plug 91', since the through-holes 904 'are eliminated from the housing 90', the structural rigidity is increased compared to the housing 90 'provided with the through-holes 904', the structural stability of the housing 90 is improved, and, at the same time, when the shell 90 is glued to achieve waterproofing, since the through hole 904' is omitted, the contact area between the shell 90 and the glue is increased, thereby improving the waterproofing effect of the shell 90. In addition, the key cap 10 is omitted from the latch 91 ', so that the risk that the latch 91' falls off from the housing 90 'due to insufficient dispensing between the latch 91' and the housing 90 and the key cap 10 falls off is avoided.

Referring to fig. 6, in order to facilitate the assembly of the switch assembly 20, the accommodating cavity 901 has a second opening, and the switch assembly 20 can be inserted into the accommodating cavity 901 through the second opening and then connected to the cavity wall of the accommodating cavity 901. Specifically, the orientation of the second opening of the accommodating cavity 901 is perpendicular to the orientation of the first opening of the mounting cavity 902. Taking the second opening of the accommodating cavity 901 as the top and the first opening of the mounting cavity 902 as the front as an example, when the key structure 100 needs to be assembled, the key cap 10 penetrates into the mounting cavity 902 from the front to the back from the first opening of the mounting cavity 902, and the part of the key cap is inserted into the accommodating cavity 901, at this time, the limiting groove is located in the accommodating cavity 901, and then the switch component 20 is inserted into the accommodating cavity 901 from the top to the bottom from the second opening of the accommodating cavity 901, and the limiting portion 213 of the reinforcement structure 21 is inserted into the first limiting groove 101. At this time, the connecting portion 212 is close to the second opening of the accommodating cavity 901, and the limiting portion 213 and the reinforcing portion 211 are far from the second opening of the accommodating cavity 901. This completes the assembly of the key structure 100 with the housing 90.

The switch assembly 20 can also be taken out through the second opening of the accommodating cavity 901 when disassembled. In this application, because reinforcement portion 211, connecting portion 212 and spacing portion 213 form C-shaped or U-shaped structure jointly, when dismantling switch module 20, only need insert the instrument in the space between spacing portion 213 and reinforcement portion 211 through the second opening of holding chamber 901, then support the instrument and press spacing portion 213 and promote spacing portion 213 and move towards installation cavity 902, so that the rear side cavity wall of keeping away from installation cavity 902 of reinforcement portion 211 and holding chamber 901 separates, the rethread upwards lifts connecting portion 212 and picks out holding chamber 901 with switch module 20 through the second opening of holding chamber 901, just so just only need operate a instrument and just can realize quick dismantlement of switch module 20 and shell 90, easy operation is swift.

Referring to fig. 6, the reinforcing portion 211 may be connected to the rear cavity wall of the accommodating cavity 901 through a back adhesive 24, and the control circuit board 22 is connected to the reinforcing structural member 21 through a back adhesive 23. In other embodiments, the reinforcing structure 21 may be connected to the housing 90 by fastening, welding, or screwing, and the specific connection may be determined according to the size of the installation space.

In one embodiment, referring to fig. 6, the position-limiting portion 213, the connecting portion 212 and the reinforcing portion 211 are integrally formed to improve the structural stability of the reinforcing structural member 21 for easy processing.

Referring to fig. 6, in order to prevent the reinforcing structural member 21 from being separated from the cavity wall of the accommodating cavity 901 due to adhesive failure after long-term use, the reinforcing structural member 21 further includes a bending portion 214 connected to the reinforcing portion 211 and bent toward the clamping groove 903, and the bending portion 214 is clamped and matched with the housing 90, so that the switch assembly 20 can be limited from shaking in the accommodating cavity 901. The extending direction of the bending portion 214 is opposite to that of the connecting portion 212, so as to be clamped on the rear cavity wall of the accommodating cavity 901. Specifically, the cavity wall of the rear side of the accommodating cavity 901, which is far away from the mounting cavity 902, is provided with a clamping groove 903, and the bending portion 214 can be in clamping fit with the clamping groove 903, so that the reinforcing structural member 21 is limited from shaking at least in the left-right direction.

Referring to fig. 6, when the switch assembly 20 is installed in the accommodating cavity 901, the limiting portion 213 may be spaced from a cavity wall of the accommodating cavity 901 close to the installation cavity 902, that is, the length of the switch assembly 20 in the front-back direction may be set to be smaller than the front-back length of the accommodating cavity 901, so that the second opening of the accommodating cavity 901 can avoid the bent portion 214, so that the switch assembly 20 can be inserted into the accommodating cavity 901 through the second opening, and at this time, the bent portion 214 is also located in the accommodating cavity 901, so that the bent portion 214 is in clamping fit with the cavity wall at the rear side of the accommodating cavity 901. When the switch component 20 is installed, the front side cavity wall close to the installation cavity 902 of the accommodating cavity 901 of the reinforcing structure 21 is firstly inserted into the accommodating cavity 901, the rear side cavity wall of the accommodating cavity 901 far away from the installation cavity 902 is separated from the reinforcing part 211, and then the reinforcing structure 21 is moved towards the rear side cavity wall of the accommodating cavity 901, so that the reinforcing part 211 of the reinforcing structure 21 is attached to the rear side cavity wall of the accommodating cavity 901, meanwhile, the bending part 214 is inserted into the clamping groove 903, as shown in fig. 7, the partial enlarged view of the part a in fig. 6 is shown, the visible spacing part 213 is separated from the front side cavity wall of the accommodating cavity 901, a gap 905 is formed, the reinforcing part 211 is bonded with the rear side cavity wall of the accommodating cavity 901 through gum, the bending part 214 is clamped in the clamping groove 903, and the limitation on the reinforcing structure 21 is realized. At this time, the upper groove wall of the clamping groove 903 may not be communicated with the upper surface of the housing 90, or the upward second opening is smaller, which is not enough to allow the bending portion 214 to be separated from the second opening, so that the groove wall of the clamping groove 903 can limit the reinforcing structural member 21 to rock in the accommodating cavity 901 in the vertical and horizontal directions.

When the upper groove wall of the clamping groove 903 is communicated with the upper surface of the housing 90, please refer to fig. 8 and 9, the limiting portion 213 is attached to the front side cavity wall of the accommodating cavity 901 close to the mounting cavity 902, and the front-back length of the switch component 20 can also be adapted to the front-back length of the accommodating cavity 901. When the switch component 20 is installed, the reinforcing portion 211 and the limiting portion 213 can be respectively attached to the cavity walls on the front side and the rear side of the accommodating cavity 901 for installation, and meanwhile, the bending portion 214 is clamped into the clamping groove 903 from the upper side of the clamping groove 903 in a forced pressing mode. Therefore, the front side cavity wall and the rear side cavity wall of the accommodating cavity 901 can respectively support the reinforcing part 211 and the limiting part 314, so that the switch component 20 is limited to move back and forth, the reinforcing part 211 is always abutted against the rear side cavity wall of the accommodating cavity 901, and the connection stability of the reinforcing part 211 and the rear side cavity wall of the accommodating cavity 901 is improved.

The number of the bending portions 214 may be plural, and at least one of the bending portions can limit the displacement of the reinforcing structural member 21 in the vertical direction.

Referring to fig. 10, after the key structure 100 is assembled, a cover plate 91 is required to be covered on the housing 90, and the cover plate 91 can cover the second opening on the accommodating cavity 901. Wherein apron 91 accessible gum or point are glued and are linked to each other with shell 90, and current button structure assembles the back on the shell, because the second open area in holding chamber is great for reduce with the bonding area of apron and shell, and then the bonding fastness is limited. In the key structure 100 of the present application, after the assembly is completed, the connecting portion 212 of the reinforcing structure 21 is close to the second opening of the accommodating cavity 901, so that the cover plate 91 is connected to the connecting portion 212 through a back adhesive or a fluid adhesive.

As shown in the figure, when the connecting portion 212 is flush with or slightly lower than the second opening of the accommodating cavity 901, the upper side of the connecting portion 212 may be covered with a back adhesive 92, and the cover plate 91 is connected to the connecting portion 212 through the back adhesive 92.

Referring to fig. 11, when the connection portion 212 is not flush with the second opening of the accommodating cavity 901 or is far away from the second opening, after the second opening of the accommodating cavity 901 covers the upper cover plate 91, a large gap exists between the cover plate 91 and the connection portion 212, at this time, the fluid adhesive 93 can be dispensed on the upper side surface of the connection portion 212, and the cover plate 91 is connected to the connection portion 212 through the dispensed fluid adhesive 93. Since the fluid gel 92 has a certain fluidity, it can fit into various shapes of gaps between the cover plate 91 and the connection portion 212. In this way, the bonding area between the cover plate 91 and the housing 90 is increased by the arrangement of the connecting portion 212 of the reinforcing structural member 21, so that the connection between the cover plate 91 and the housing 90 is firmer, and the risk of degumming is reduced. When the casing 90 is a middle frame of a mobile terminal such as a mobile phone, the cover plate 91 may be a battery cover assembly, wherein the battery cover assembly includes a battery cover diaphragm covering the middle frame and a battery cover body located above the battery cover diaphragm. The battery cover body may be connected above the battery cover membrane through a back adhesive, and the battery cover membrane is connected with the middle frame through the back adhesive and connected with the connection part 212 by sticking the back adhesive or dropping a fluid adhesive, thereby completing the assembly of the mobile terminal housing.

In this embodiment, the reinforcing structure 21 may be made of a rigid material and have no elasticity.

Optionally, when the key cap 10 is in the first position, the limiting portion 213 abuts against the rear side groove wall of the first limiting groove 101 close to the switch component 20 to limit the key cap 10 from moving forward away from the switch component 20; when the key cap 10 is at the second position, the limiting portion 213 abuts against a front groove wall of the first limiting groove 101 away from the switch component 20 to limit the key cap 10 from moving backward toward the switch component 20. That is, the groove width of the first stopper groove 101 in the front-rear direction is equal to the distance between the first position and the second position, the key cap 10 is stopped from moving between the first position and the second position, and the first stopper groove 101 provides an escape space for the reinforcement portion 211. Due to the limiting effect of the mounting groove 904 on the key head 11, when the key cap 10 is at the second position, the limiting portion 213 may also be spaced apart from the front side wall of the first limiting groove 101 away from the switch assembly 20. At this time, the groove width of the first stopper groove 101 in the extending direction of the connection hole 905 is larger than the distance between the first position and the second position.

In other embodiments, the reinforcing structure 21 can be elastically deformed, and at least the position-limiting portion 213 or the connecting portion 212 has elasticity. The position-limiting portion 213, the connecting portion 212 and the reinforcing portion 211 may be integrally formed metal sheets.

Alternatively, the groove width of the first stopper groove 101 in the front-rear direction is smaller than the distance that the key cap 10 moves from the first position to the second position. When the user presses the key cap 10 and the key cap 10 moves to the second position, the front side wall of the first limiting groove 101 away from the switch component 20 abuts against the limiting portion 213 and pushes the reinforcing structure 21 to elastically deform, and when the user releases his hand, the key cap 10 moves toward the first position under the elastic restoring force of the reinforcing structure 21. The rear side wall of the first limiting groove 101 close to the switch component 20 may abut against the limiting portion 213, or may be spaced from the limiting portion 213.

In another embodiment, referring to fig. 12, the connecting portion 212 and the reinforcing portion 211 are integrally formed, and the limiting portion 213 and the connecting portion 212 are not integrally formed but fixedly connected by welding or bonding, wherein the limiting portion 213 may have a flange 215, and the limiting portion 213 is bonded to the connecting portion 212 by the flange 215. Thus, when the switch assembly 20 is assembled with the housing 90, the integral member formed by the reinforcing portion 211 and the connecting portion 212 may be inserted into the accommodating cavity 901 from the second opening of the accommodating cavity 901 downward, the reinforcing portion 211 is bonded to the rear cavity wall of the accommodating cavity 901 far away from the mounting cavity 902 through the back adhesive, the limiting portion 213 is inserted into the accommodating cavity 901 downward from the second opening of the accommodating cavity 901 and is inserted into the first limiting groove 101 of the key cap 10, and the flange 215 of the limiting portion 213 is connected with the connecting portion 212 into a whole in a bonding or welding manner. At this time, the limiting portion 213 can be abutted against the front side cavity wall of the accommodating cavity 901, which is close to the mounting cavity 902, so as to support the reinforcing portion 211, thereby limiting the separation of the reinforcing portion 211 from the rear side cavity wall of the accommodating cavity 901, and limiting the reinforcing structural member 21 from shaking in the accommodating cavity 901, thereby improving the structural stability of the switch assembly 20. Meanwhile, after the integrated part formed by the reinforcing part 211 and the connecting part 212 is connected in the accommodating cavity 901, the limiting part 213 is inserted into the accommodating cavity 901 from the second opening and is connected with the connecting part 212 through the turned-over edge 215, so that the position of the limiting part 213 can be adjusted according to the length of the accommodating cavity 901 in the front-back direction, the limiting part 213 is always abutted against the front cavity wall of the accommodating cavity 901, and the applicability is high.

In another embodiment, the stopper portion 213 and the connecting portion 212 may be integrally formed, and the connecting portion 212 and the reinforcing portion 211 are not integrally formed but fixedly connected by welding, bonding, or other connection means.

Referring to fig. 13, the switch components 20 of the plurality of key structures 100 may be an integrated piece, at this time, the reinforcing portions 211 are connected to form an integrated body, and the control circuit boards 22 may also be connected to form an integrated body, and in combination with fig. 5, the integrated switch components may facilitate the installation of the plurality of switch components 20 into the accommodating cavity 901 at the same time. At this time, the accommodating cavity 901 may be adapted to an integrally formed part formed by the switch assembly 20, specifically, the accommodating cavity 901 may be provided with a plurality of communicated chambers, the reinforcing portion 211 of each switch assembly 20 passes through the connecting cavities between the chambers to be connected into a whole, the connecting portion 212 and the limiting portion 213 of each switch assembly 20 are respectively located in one chamber, and the chambers limit the limiting portion 213 to prevent the switch assembly 20 from swaying left and right.

Referring to fig. 13, the first limiting groove 101 is disposed around the circumference of the key cap 10, two side groove walls and a groove bottom of the first limiting groove 101 together define a groove inner space, and the limiting portion 213 may extend to at least a part of the groove inner space of the first limiting groove 101 of the touch bar 12, for example, at least one of the left side, the right side or the upper side of the first limiting groove 101, and may also extend to the circumference of the touch bar 12, that is, the first limiting groove 101 is inserted into and matched around the circumference of the first limiting groove 101. Since the position-limiting part 213 is inserted into the second opening of the accommodating cavity 901 from top to bottom and into the space inside the first position-limiting groove 101, in this embodiment, the position-limiting part 213 surrounds the left side, the upper side and the right side of the first position-limiting groove 101, and in other embodiments, after the position-limiting part 213 is inserted into the accommodating cavity 901 from the second opening of the accommodating cavity 901 from top to bottom, the position-limiting part 213 can be inserted into the space inside the first position-limiting groove 101 by moving the switch assembly 20 left and right in the accommodating cavity 901.

In the present embodiment, please refer to fig. 14, the position-limiting portion 213 has a positioning groove 201 opened downward, the key cap 10 has a narrow portion 111 formed at the first position-limiting groove 101, and the narrow portion 111 can be inserted into the positioning groove 201. When the position-limiting portion 213 is inserted into the first position-limiting groove 101, the narrow portion 111 of the key cap 10 is also inserted into the positioning groove 201 from the lower opening of the positioning groove 201, and at this time, the groove wall of the positioning groove 201 is opposite to the groove bottom of the first position-limiting groove 101, and the narrow portion 111 and the positioning groove 201 can be in clearance fit. The positioning groove 201 can restrict the movement of the stopper portion 213 toward the left, right, and upper directions, thereby restricting the separation of the narrow portion 111 from the stopper portion 213.

The limiting part 213 includes an upper limiting claw 2131, a left limiting claw 2132 and a right limiting claw 2133, the upper limiting claw 2131 is connected to the connecting part 212, the left limiting claw 2132 and the right limiting claw 2133 are connected to the lower part of the upper limiting claw 2131 and spaced from each other, and the upper limiting claw 2131, the left limiting claw 2132 and the right limiting claw 2133 together enclose to form a positioning groove 201 which is through in the front-back direction and is open downward. Thus, the upper limiting claw 2131, the left limiting claw 2132 and the right limiting claw 2133 realize the limiting of the narrow part 111 in three directions, and simultaneously can limit the keycap 10 to move away from the switch assembly 20, so that the reliability of limiting the keycap 10 is improved. When the limiting part 213 is inserted into the first limiting groove 101, the upper limiting pawl 2131 is inserted into the upper side groove space of the first limiting groove 101, the left limiting pawl 2132 is inserted into the left side groove space of the first limiting groove 101, and the right limiting pawl 2133 is inserted into the right side groove space of the first limiting groove 101. Wherein, the cross-section of constant head tank 201 can form circular-arcly to the realization is spacing to the even of key cap 10. The cross-sectional shape of the positioning groove 201 is not limited thereto, and in other embodiments, the cross-section of the groove wall of the positioning groove 201 may be serrated.

Alternatively, referring to fig. 13, the minimum width of the downward opening of the positioning slot 201 may be slightly smaller than the diameter of the narrow portion 111, so that when the limiting portion 213 is inserted into the first limiting groove 101, at least one of the left limiting pawl 2132, the right limiting pawl 2133, or the narrow portion 111 may be slightly elastically deformed, so that the narrow portion 111 enters the positioning slot 201, and at this time, the opening of the positioning slot 201 can limit the narrow portion 111 from being separated from the positioning slot 201.

Alternatively, referring to fig. 14, the downward opening of the positioning groove 201 may be set as a flared opening 202, so that the limiting portion 213 is inserted into the narrow portion 111 for alignment, and the narrow portion 111 can be quickly slid into the positioning groove 201 through the flared opening 202.

In other alternative embodiments, the limiting portion 213 may include at least one of the upper limiting claw 2131, the left limiting claw 2132 or the right limiting claw 2133, for example, one of the upper limiting claw 2131, the left limiting claw 2132 or the right limiting claw 2133 may be provided separately, or only the upper limiting claw 2131 and the left limiting claw 2132 may be provided, or only the upper limiting claw 2131 and the right limiting claw 2133 may be provided, or only the left limiting claw 2132 and the right limiting claw 2133 may be provided. As long as the limiting portion 213 can limit the contact rod 12 from moving forward and backward after being inserted into the first limiting groove 101.

Referring to fig. 15, the key cap 10 includes a key head 11 and a touch bar 12, the key head 11 extends transversely, the touch bar 12 is located between the key head 11 and the switch assembly 20 and extends longitudinally toward the switch assembly 20, wherein a front end of the touch bar 12 is connected to the key head 11, a rear end of the touch bar extends into the accommodating cavity 901, and the first limiting groove 101 is opened on a peripheral side surface of the touch bar 12. The first limiting groove 101 may be disposed around the periphery of the feeler lever 12, and the first limiting groove 101 is disposed on a portion of the feeler lever 12 extending into the accommodating cavity 901. When the key cap 10 is in the first position, the rear extension of the contact rod 12 abuts against the switch contact 221. When the key cap 10 is pressed backward by an external force, the key cap 10 moves from the first position to the second position, the contact rod 12 moves relative to the stopper 213, and the switch contact 221 is pressed, so that the switch assembly 20 is actuated.

The first limiting groove 101 may be a first limiting groove 101 formed by grooving in the axial direction of the feeler lever 12, or a first limiting groove formed by surrounding two spaced protrusions on the peripheral side of the feeler lever 12.

Feeler lever 12 and button head 11 fixed connection in this application through the integration setting with feeler lever 12 and button head 11, have realized the synchronous bulk movement of button head 11 with feeler lever 12.

The key head 11 can be symmetrically arranged relative to the central axis of the contact rod 12, so that the assembly is fool-proof, and the time for repeated assembly is reduced.

This application is spacing through reinforcement structure 21 to feeler lever 12, can restrict key cap 10 and deviate from installation cavity 902 under the condition of not setting up lug 111 ' and through-hole 904 ' in fig. 1, just also needn't set up a plurality of key heads 11 ' integration in order to reduce through-hole 904 ' quantity, a plurality of key caps 10 just so can set up alone, not only eliminate the risk of scurrying the key, and reduced the first open-ended of installation cavity 902 and seted up the area, the rigidity of shell 90 has further been improved. Each key cap 10 can form the standard component, and the mass production of the key cap 10 of being convenient for reduces the processing cost.

To limit the key head 11 and the touch bar 12 respectively, please refer to fig. 15, the mounting cavity 902 of the housing 90 includes a mounting groove 904 and a connecting hole 905 for communicating the bottom of the mounting groove 904 with the accommodating cavity 901, the notch of the mounting groove 904 is a first opening of the mounting cavity 902, and the mounting groove 904 is openable on the side of the housing 90. The contact rod 12 is inserted into the connecting hole 905 and can slide in the connecting hole 905 along the axial direction of the connecting hole 905, the peripheral side surface of the contact rod 12 faces the hole wall of the connecting hole 905, and the key head 11 is wholly or partially accommodated in the mounting groove 904 and can slide in the mounting groove 904 close to or away from the switch assembly 20 along with the sliding of the contact rod 12. The area of the key head 11 exposed outside the shell 90 is large, the pressing area of the key cap 10 pressed by a user is increased, the arrangement of the contact rod 12 not only realizes the transmission of force on the key head 11, but also enables the aperture of the connecting hole 905 to be small, and reduces the influence on the structural rigidity of the shell 90. The height direction of the key head 11 is the height in the front-rear direction. The cross section of the connecting hole 905 in the width direction may be a polygon, a circle, an ellipse or an irregular figure, in this embodiment, the cross section of the connecting hole 905 and the cross section of the contact rod 12 are both circular, and the contact rod 12 and the connecting hole 905 may be in clearance fit. The width direction of the connection hole 905 is a direction perpendicular to the axial direction of the connection hole 905.

When the key cap 10 is at the first position, the key head 11 is spaced from the groove bottom of the mounting groove 904; when the key cap 10 moves to the second position, the key head 11 abuts against the bottom of the mounting groove 904, and the bottom of the mounting groove 904 can limit the key head 11 to continue moving towards the switch component 20, i.e. limit the key cap 10 to continue pressing towards the switch component 20, so as to prevent the switch component 20 from being damaged.

It should be noted that the installation cavity 902 may not be provided with the installation groove 904, but only provided with the connection hole 905, and the connection hole 905 can guide and limit the keycap 10.

Referring to fig. 15, in order to prevent external liquid from entering the accommodating cavity 901, a waterproof ring 30 is disposed around the keycap 10. Optionally, the waterproof ring 30 is arranged around the periphery of the feeler lever 12 and located between the hole wall of the connecting hole 905 and the feeler lever 12, the waterproof ring 30 and the feeler lever 12 can be arranged independently, and the waterproof ring 30 is sleeved on the feeler lever 12 at the moment, so that the waterproof ring 30 and the feeler lever 12 can be detached quickly.

Referring to fig. 15, in order to limit the waterproof ring 30, a second limiting groove 102 is annularly disposed on the peripheral side of the feeler lever 12, and the waterproof ring 30 is located in the second limiting groove 102 and protrudes from the peripheral side of the feeler lever 12 to elastically abut against the hole wall of the connecting hole 905. When the feeler lever 12 moves in the connecting hole 905 along the extending direction of the connecting hole 905, the groove wall of the second limiting groove 102 can limit the displacement of the waterproof ring 30, and the waterproof ring 30 always elastically abuts against the hole wall of the connecting hole 905. The second limiting groove 102 is located on one side of the first limiting groove 101 facing the key head 11 and spaced from the first limiting groove 101, so that the waterproof ring 30 can be located in the connecting hole 905 and elastically abut against the hole wall of the connecting hole 905, thereby preventing external liquid from flowing into the first limiting groove 101 and the accommodating cavity 901 along the connecting hole 905.

Referring to fig. 16, the waterproof ring 30 may be integrally formed with the trolley 12, and the waterproof ring 30 is formed on the trolley 12 or fixedly connected to the trolley 12 to reduce the torsion of the waterproof ring 30 due to the friction of the hole wall of the connecting hole 905 during the movement. The waterproof ring 30 may be made of an elastic material, such as a plastic member, and the waterproof ring 30 may elastically abut against the hole wall of the connection hole 905, so as to effectively seal the connection hole 905, so as to limit the liquid from permeating into the accommodating cavity 901 along the connection hole 905. The waterproof ring 30 may have a circular cross-section or a polygonal cross-section, such as a quadrilateral or a triangle.

Referring to fig. 15, the key cap 10 directly and fixedly connects the touch bar 12 and the key head 11, the touch bar 12 includes a rod portion 121 connected to the rear side of the key head 11 and a buffer portion 122 at least connected to the rod portion 121 and facing the rear side of the switch assembly 20, the rod portion 121 is located in the connection hole 905 and extends along the extension direction of the connection hole 905, the buffer portion 122 can be elastically deformed, and the buffer portion 122 can be a plastic part. When the key cap 10 is at the first position, the buffer portion 122 abuts against the switch component 20, and when the key cap 10 moves toward the second position, the buffer portion 122 is elastically deformed and compressed, so as to buffer the pressure between the rod portion 121 and the switch component 20, thereby buffering the abutting pressure of the touch rod 12 against the switch component 20. Because the buffer part 122 is closer to the rear side of the key cap 10 than the conductive base 13' in fig. 1, when liquid permeates into the installation groove 904, the liquid is not suitable to touch the buffer part 122, so that the possibility that the buffer part 122 is soaked is reduced, the swelling risk is reduced, the risk that the pressure of the key cap 10 on the switch component 20 is increased is reduced, the sensitivity of the key structure 100 is ensured, and the service life of the key structure 100 is prolonged. Meanwhile, since the buffer portion 122 is located at the end of the key cap 10 and directly collides with the switch component 20, the structural strength of the key cap 10 is less affected, and thus the size and shape of the key head 11 and the touch bar 12 can be freely set as required. The feeler lever 12 is directly connected with the key head 11, so that the overall structural rigidity and stability of the key cap 10 are improved, meanwhile, the risk that the force on the key head 11 ' cannot be transmitted to the feeler lever 12 ' due to the fact that the conductive base 13 ' and the key head 11 ' of the current key structure 100 ' are not firmly separated from the key head 11 ' due to the fact that glue is dispensed on the key head 11 ' in the figure 1 is eliminated, the assembly deviation is reduced, and the pressing hand feeling when a user presses the key cap 10 is guaranteed.

In one embodiment, referring to fig. 17, the buffer portion 122 may be connected to the rear free end of the rod portion 121 in a sheet shape, so as to facilitate the quick connection between the buffer portion 122 and the rod portion 121. The cross-sectional size of the buffer portion 122 in the width direction is matched with the cross-sectional size of the rod portion 121 in the width direction, and both the first limiting groove 101 and the second limiting groove 102 can be opened in the rod portion 121 at this time.

In another embodiment, referring to fig. 18, a boss 1221 may be further protruded from a side of the buffer portion 122 facing the rod portion 121, a connecting groove is opened on a rear side of the rod portion 121 facing the switch component 20, the boss 1221 of the buffer portion 122 is inserted into the connecting groove, the first position-limiting groove 101 may be opened in the rod portion 121, or may be formed by a gap between the rod portion 121 and the buffer portion 122, and the second position-limiting groove 102 may be opened in the rod portion 121. The insertion fit of the boss 1221 and the connection groove improves the connection stability of the buffer portion 122 and the rod portion 121.

In another embodiment, please refer to fig. 19, the buffer portion 122 is not only disposed at the rear extending end of the rod portion 121, but also disposed at the periphery of the rod portion 121, specifically, the buffer portion 122 may be a sleeve with one closed end and one open end, and is sleeved on the rod portion 121, the closed end thereof is located at the rear side of the rod portion 121, that is, the rod portion 121 is inserted into the central hole of the buffer portion 122, and at this time, the first limiting groove 101 and the second limiting groove 102 may both be disposed on the buffer portion 122. Buffer portion 122 is connected with pole portion 121 through the bell and spigot joint mode, has increased the area of contact of buffer portion 122 with pole portion 121, has increased the frictional force between buffer portion 122 and the pole portion 121, the quick connection of buffer portion 122 and pole portion 121 of not only being convenient for to can restrict the separation of buffer portion 122 and pole portion 121.

Optionally, when the first limiting groove 101 is opened on the buffering portion 122 of the contact rod 12, a groove width of the first limiting groove 101 in the front-back direction may also be equal to a thickness of the limiting portion 213 in the front-back direction, when the key cap 10 is at the first position, the buffering portion 122 does not elastically deform, when the key cap 10 is subjected to a pressure in a direction toward the switch assembly 20, the buffering portion 122 may elastically deform, so that the key cap 10 moves from the first position to the second position, at this time, the buffering portion 122 can provide an elastic restoring force for the movement of the contact rod 12 through the elastic deformation, and when the external force is removed, the key cap 10 is reset to the first position under the elastic restoring force. The buffer portion 122 can be configured to always ensure that the key cap 10 is reset to the first position, so as to prevent the touch rod 12 from moving forward due to the reinforcement structure 21 after being used for a long time.

Finally, it should be noted that: the above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (21)

1. The utility model provides a button structure installs in the shell, holding chamber and installation cavity have been seted up to the shell, the installation cavity has first opening, and link up to the holding chamber, its characterized in that, button structure includes:

the key cap penetrates through the installation cavity, a first limiting groove is formed in the key cap, and the key cap can move between a first position and a second position in the installation cavity;

the switch assembly is positioned in the accommodating cavity and comprises a control circuit board and a reinforcing structural part, the reinforcing structural part comprises a reinforcing part, a connecting part and a limiting part, the control circuit board is connected with the reinforcing part and is provided with a switch contact, the connecting part is connected with the reinforcing part and the limiting part, and the limiting part and the reinforcing part are spaced and inserted into the first limiting groove;

when the keycap moves to the first position, the limiting part is used for limiting the keycap to move away from the switch contact, and when the keycap moves from the first position to the second position, the keycap presses the switch contact.

2. The key structure of claim 1, wherein the position-limiting portion defines a positioning groove, the key cap has a narrow portion disposed in the first position-limiting groove, and the narrow portion is inserted into the positioning groove.

3. The key structure according to claim 2, wherein the limiting portion includes an upper limiting claw, a left limiting claw and a right limiting claw, the upper limiting claw is connected to the connecting portion, the left limiting claw and the right limiting claw are both connected to a lower portion of the upper limiting claw and spaced apart from each other, and the upper limiting claw, the left limiting claw and the right limiting claw together enclose the positioning groove which is formed to penetrate in a front-back direction and open downward.

4. The key structure according to any one of claims 1 to 3, wherein the reinforcing portion, the connecting portion, and the limiting portion are integrally formed.

5. The key structure according to any one of claims 1 to 3, wherein the reinforcing portion and the connecting portion are integrally formed, and the limiting portion is provided with a flange connected to the connecting portion.

6. The key structure according to any one of claims 1 to 5, wherein the reinforcing portion is connected to a wall of the accommodating cavity that is far from the mounting cavity, and the limiting portion is spaced from a wall of the accommodating cavity that is near to the mounting cavity.

7. The key structure according to any one of claims 1 to 5, wherein the reinforcing portion is connected to a wall of the accommodating cavity that is far from the mounting cavity, and the limiting portion is attached to a wall of the accommodating cavity that is near to the mounting cavity.

8. The key structure according to any one of claims 1 to 7, wherein the reinforcing structure further comprises a bent portion connected to the reinforcing portion, the bent portion and the connecting portion extend in opposite directions, and the bent portion is engaged with the housing.

9. The key structure according to any one of claims 1 to 8, wherein the key cap includes a key head and a touch bar, the touch bar is connected to a side of the key head facing the switch component and can abut against the switch contact, and the first limiting groove is opened on a peripheral side surface of the touch bar.

10. The key structure of claim 9, wherein the lever comprises a rod portion connected to the key head and at least a buffer portion connected to a side of the rod portion facing the switch contact, the buffer portion having elasticity.

11. The key structure of claim 10, wherein the buffer portion is nested in the stem portion.

12. The key structure of claim 10, wherein a connecting groove is formed on a side of the lever portion facing the switch contact, and a boss is protruded on a side of the buffer portion facing the lever portion and inserted into the connecting groove.

13. The key structure according to any one of claims 1 to 12, wherein the key structure further comprises a waterproof ring, and the waterproof ring is sleeved on the keycap and elastically abuts against a cavity wall of the installation cavity.

14. The key structure of claim 13, wherein the waterproof ring is formed on the keycap.

15. The key structure of claim 13, wherein the key cap ring is provided with a second limiting groove, the second limiting groove is located on a side of the first limiting groove away from the switch contact, and the waterproof ring is sleeved in the second limiting groove.

16. A terminal comprising a housing and at least one key structure according to any one of claims 1 to 15.

17. The terminal of claim 16, wherein the housing defines a receiving cavity and a mounting cavity having a first opening and communicating with the receiving cavity, the key cap is disposed through the mounting cavity, and the receiving cavity is configured to receive the switch assembly.

18. A terminal as claimed in claim 17, wherein the housing cavity has a second opening, and the connecting portion is adjacent the second opening.

19. A terminal according to claim 18, further comprising a cover plate attached to the housing and covering the second opening, the cover plate being bonded to the attachment portion by a back adhesive or a fluid adhesive.

20. A terminal as claimed in any one of claims 16 to 19, wherein the key cap includes a key head and a contact rod, the contact rod is connected to a side of the key head facing the switch assembly, the mounting cavity includes a mounting slot opened in the housing and a connecting hole communicating the mounting slot with the accommodating cavity, the contact rod is inserted into the connecting hole, and the key head is at least partially accommodated in the mounting slot.

21. The terminal according to any one of claims 16 to 20, wherein a clamping groove is formed in a wall of the accommodating cavity, the reinforcing structural member further comprises a bending portion connected to the reinforcing portion, and the bending portion is in clamping fit with the clamping groove.

Images