CN212909612U

CN212909612U - Frame, key structure and terminal

Info

Publication number: CN212909612U
Application number: CN202022009047.8U
Authority: CN
Inventors: 季春炜
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2021-04-06
Anticipated expiration: 2030-09-14

Abstract

The present disclosure relates to a frame, a key structure and a terminal, including: a frame; the frame is provided with a key groove, a mounting groove and a limiting hole; the key groove is used for installing a key; the mounting groove is communicated with the key groove and is used for mounting a circuit connected with the key; the limiting hole is used for installing a limiting structure for limiting the movement of the key in a first direction, is distributed in parallel with the installation groove in a second direction and is communicated with the key groove, wherein the first direction is the pressing direction of the key, and the first direction is perpendicular to the second direction. Spacing hole and mounting groove separation, the mounting groove need not to be for installation limit structure reserved space, the occupation space of reducible mounting groove. The width of the frame along the first direction can be further compressed, so that the space utilization rate of the frame is improved, and more spaces can be reserved for the battery compartment.

Description

Frame, key structure and terminal

Technical Field

The present disclosure relates to the field of terminal technologies, and in particular, to a frame, a key structure, and a terminal.

Background

With the development of terminal technology, it is a trend to maximize the use of the space in the terminal and to increase the battery capacity in the terminal. Taking a bar phone as an example, the side key of the phone is inserted into the side of the frame, the frame is provided with a mounting groove, the mounting groove is used for mounting a circuit board connected with the side key, and the mounting groove and the side key occupy the inner space of the frame. In order to limit the disengagement of the side key, parts such as a steel sheet and the like are usually added in the mounting groove to fix the side key, the occupied space is further increased by the parts such as the steel sheet and the like, and the excessive occupied space usually comes at the expense of the space of the battery compartment, so that the available volume of the battery compartment is reduced, and the capacity of a terminal battery is influenced.

SUMMERY OF THE UTILITY MODEL

The present disclosure provides a frame body, a key structure and a terminal.

According to a first aspect of embodiments of the present disclosure, there is provided a frame body including:

a frame;

the frame is provided with a key groove, a mounting groove and a limiting hole;

the key groove is used for installing a key;

the mounting groove is communicated with the key groove and is used for mounting a circuit connected with the key;

the limiting hole is used for installing a limiting structure for limiting the movement of the key in a first direction, is distributed in parallel with the installation groove in a second direction and is communicated with the key groove, wherein the first direction is the pressing direction of the key, and the second direction is perpendicular to the first direction.

In some embodiments of the present invention, the,

the spacing hole includes:

a first limit hole positioned at the top of the key slot,

and the second limiting hole is positioned at the bottom of the key groove and is coaxial with the first limiting hole.

According to a second aspect of the embodiments of the present disclosure, there is provided a key structure including:

a key, comprising: the key body is positioned in the key groove of the frame body in any embodiment;

and the limiting structure is positioned in the limiting hole of the frame body and is in contact with the limiting lug to limit the movement of the key body in the first direction.

In some embodiments, the key further comprises:

the flange and the limiting lug are respectively positioned at the opposite ends of the key body;

the flange is positioned in the mounting groove and is respectively positioned on different sides of the mounting wall with the key groove together with the key body.

In some embodiments, the stopper structure comprises:

the spacer pin has: the middle part of the limiting pin is inserted into the limiting lug to contact;

one end part of the limiting pin is positioned in the first limiting hole; the other end part of the limiting pin is positioned at the bottom of the key and is provided with a butting surface opposite to the key.

In some embodiments, the outer diameter of the two end portions of the stopper pin is greater than the outer diameter of the middle portion of the stopper pin, and the outer diameter of the two end portions of the stopper pin is less than or equal to the inner diameter of the stopper hole.

In some embodiments, the limiting lug has elasticity, the limiting lug is bent to form a mounting groove, the opening width of the mounting groove is smaller than the outer diameter of the middle part of the limiting pin, and the limiting pin is inserted into the mounting groove.

In some embodiments, the limiting lug and the key body are respectively located on two sides of the limiting structure along the first direction.

In some embodiments, the spacing pin is integrally formed with the frame body.

According to a third aspect of the embodiments of the present disclosure, there is provided a terminal, including:

the frame of any of the above embodiments;

the key structure according to any of the above embodiments.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

according to the embodiment, in the present disclosure, the limiting hole is separated from the mounting groove, the mounting groove does not need to reserve space for mounting the limiting structure, and the occupied space of the mounting groove can be reduced. And, spacing hole and mounting groove are distributed side by side along the second direction, are limit structure's installation obligate space from the second direction of frame, have reduced the stack of spacing hole occupation space and spacing groove occupation space on the first direction, and the frame can further be compressed along the width of first direction, has improved the space utilization of frame, and the battery compartment can be handed over in the space of saving, is favorable to improving battery capacity.

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

Drawings

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

Fig. 1 is a partial structural view of a terminal;

fig. 2 is one of the partial structural diagrams of a terminal shown according to an exemplary embodiment;

fig. 3 is a second schematic partial structure diagram of a terminal according to an exemplary embodiment;

FIG. 4 is a schematic diagram illustrating a key structure according to an exemplary embodiment;

fig. 5 is a third schematic diagram illustrating a partial structure of a terminal according to an exemplary embodiment.

Detailed Description

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

In the description of the present disclosure, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientation or positional relationship of a user when using a key or a terminal.

As shown in fig. 1, the terminal includes an FPC assembly 10, a key 20, a fixing steel sheet 30, and a center frame 40. The middle frame 40 is opened with a long groove (i.e. the mounting groove 21) with a certain width, the side key FPC assembly 10 is mounted therein, then the keys 20 are placed from the side, and finally the steel sheet 30 is inserted to fix the keys 20. In the width direction of the middle frame 40 (i.e. the first direction of the middle frame), the position near the center of the middle frame 40 is the position of the battery compartment, and the edge of the middle frame 40 next includes the blocking wall width a, the mounting groove width B, and the mounting wall width C, which affect the width dimension of the battery compartment, and thus affect the battery capacity. Filling the fixing steel sheet 30 in the mounting groove 21 not only increases the occupied space, but also is not beneficial to saving the cost. If plastic materials are used for replacing steel sheets, the keys are fixed by utilizing the characteristics of good ductility and deformability of plastics, so that the cost can be saved, but the strength of the plastic materials is poor, and the key fixing effect is not ideal. For further improvement, the present disclosure proposes the following.

As shown in fig. 2 and 5, the disclosed embodiments provide a frame body including:

a frame 110;

the frame 110 has a key slot 113, a mounting groove 112 and a limiting hole 111;

wherein, the key slot 112 is used for installing the key 120;

a mounting groove 112 communicated with the key groove 113 for mounting a line 150 connected with the key 120;

the limiting hole 111 is used for installing a limiting structure 130 for limiting the movement of the key 120 in a first direction, is distributed in parallel with the installation groove 112 along a second direction, and is communicated with the key groove 113, wherein the first direction is the pressing direction of the key, and the second direction is perpendicular to the first direction.

When the frame body in the embodiment of the disclosure is used in a terminal, the frame body can be used as a middle frame of the terminal. As shown in fig. 2 and 5, the limiting hole 111 is separated from the mounting groove 112, the mounting groove 112 does not need to reserve a space for mounting the limiting structure, and compared with the mounting groove 112 in fig. 1, the width of the mounting groove 112 along the first direction in the disclosure can be further reduced, so that the occupied space of the mounting groove 112 is reduced. And, spacing hole 111 and mounting groove 112 distribute side by side along the second direction, are spacing structure's installation reserved space from the second direction of frame 110, have reduced the stack of spacing hole 111 occupation space and spacing lug 122 occupation space in the first direction, and frame 110 can further be compressed along the whole width D of first direction, has improved frame 110's space utilization, and the battery compartment can be handed over in the space of saving, is favorable to improving battery capacity.

Spacing hole and mounting groove are distributed side by side along the second direction and are the occupation space in order to disperse spacing hole and the occupation space of mounting groove, and the occupation space in spacing hole of restriction and the occupation space of mounting groove reduce the width of frame in the first direction in the stack of first direction. Therefore, the position of the limiting hole may be outside the projection of the mounting groove along the first direction, for example, as shown in fig. 2 and 5, the limiting hole 111 is adjacent to the end of the mounting groove 112 along the second direction and is spaced apart from the end of the mounting groove 112 along the second direction.

The frame is exemplified by a rectangular frame, and the first direction is parallel to the plane of the largest surface of the frame. The plane of the largest surface of the frame body is the top surface of the frame body or the surface parallel to the top surface.

Without limitation, the key slot, mounting slot and limiting hole may all be formed by machining.

In practical applications, as shown in fig. 2 and 5, the opening of the mounting slot 112 is located on the top surface of the frame 110, the opening of the key slot 113 is located on the side surface of the frame 110, and the key 120 can extend into the mounting slot 112 after being inserted from the key slot 113 so as to be connected with the circuit 150 located in the mounting slot 112. The opening of the limiting hole 111 and the opening of the mounting groove 112 are located on the same plane, the axis of the limiting hole 111 is perpendicular to the key slot 113, and the limiting structure can extend into the mounting groove 112 from the limiting hole 111 so as to contact with the key 120 in the mounting groove 112 and limit the movement of the key 120 along the first direction.

Without limitation, the number of the key grooves corresponds to the number of the keys one to one, one mounting groove can correspond to at least one key groove, and one key groove can correspond to two limiting holes. Fig. 3 and 5 exemplarily show that one installation groove 112 corresponds to two key slots 113, the two key slots 113 are arranged at intervals, and two ends of the installation groove 112 are respectively provided with one limiting hole 111. In other examples, one mounting groove 112 may correspond to one key slot 113, two ends of the mounting groove 112 are respectively provided with one limiting hole 111, and the movement of the key 120 along the first direction is limited by two limiting mechanisms passing through the limiting holes 111, so as to prevent the key 120 from being disengaged from the key hole.

In other alternative embodiments, as shown in fig. 5, the frame 110 includes:

a blocking wall 115 and a mounting wall 114, the blocking wall 115 being located between the mounting wall 114 and a central position of the frame;

the mounting slot 112 is located between the blocking wall 115 and the mounting wall 114;

the key groove is positioned on the side surface of the mounting wall far away from the center of the frame body;

the limiting hole 111 is located on the top surface of the mounting wall 114, and the top surface of the mounting wall 114 is perpendicular to the side surface of the mounting wall 114 away from the center of the frame body.

In contrast, the blocking wall is closer to the center of the frame body, and the mounting wall is positioned at the outermost side of the frame body. The blocking wall can be used for installing a circuit connected with the key, and when the key is pressed, the blocking wall receives acting force acting on the key.

As shown in fig. 3 and 5, the key slot 113 is only partially overlapped with the projection of the mounting groove 112 along the first direction, and at least one end of the key slot 113 is overlapped with the projection of the mounting groove 112 along the first direction. That is, in the first direction, the key slot 113 and the mounting groove 112 are offset, and the offset region E is shown in fig. 5. The limiting hole 111 is located in the position range of the staggered area E.

In other alternative embodiments, the frame includes:

the bottom plate corresponds to the largest surface of the frame body, and the frame is located on the edge of the bottom plate.

In the present disclosure, fig. 3 and 5 do not show the bottom plate. The frame is formed by the upwards protrusion of bottom plate, and the frame limits spaces such as battery compartment jointly with the bottom plate. Taking a rectangular frame as an example, the frame is square.

In other alternative embodiments, the retaining hole comprises:

a first limit hole positioned at the top of the key slot,

In the embodiment of the disclosure, the key is located between the first limiting hole and the second limiting hole. When the limiting structure is installed in the limiting hole, the limiting structure can penetrate through the key groove, the first limiting hole and the second limiting hole limit the limiting structure in the limiting hole respectively, the limiting device is limited at least to move along the circumferential direction of the limiting hole, and the stability of the relative position of the limiting device and the frame is guaranteed.

Without limitation, the first limiting hole is a through hole so as to communicate with the key groove. The second limiting hole is a blind hole, namely when the limiting structure is inserted into the first limiting hole, the second limiting hole enters the second limiting hole after passing through the key groove, and is abutted against the bottom of the second limiting hole, so that the limiting structure is limited to continuously move downwards, and the limiting effect on the axial direction of the limiting structure is further achieved.

The inner diameters of the first limiting hole and the second limiting hole can be equal or unequal. For example, the inner diameter of the lower second limiting hole is smaller than that of the first limiting hole, so that the limiting structure can be inserted.

The embodiment of the present disclosure further provides a key structure, including:

a key 120, comprising: the key comprises a key body 121 and a limiting lug 122 positioned at the end part of the key body 121, wherein the key body 121 is positioned in the keyway 113 of the frame body in any one of the embodiments;

the limiting structure is located in the limiting hole 111 of the frame body and is in contact with the limiting lug 122 to limit the movement of the key body in the first direction.

Illustratively, the limiting lug and the key body are respectively positioned at two sides of the limiting structure along the first direction. As shown in fig. 2 and 4, wherein the frame 110 is removed in fig. 2 as compared to fig. 3. The limiting lug 122 has a limiting surface 1221 opposite to the limiting structure, and the limiting lug 122 can abut against the limiting structure through the limiting surface 1221. Specifically, when the key 120 is pressed, the key 120 compresses the elastic member 140, and when the key body 121 is pressed toward the center of the frame body by the key body 121, the limiting surface 1221 is separated from the limiting structure; after the acting force acting on the key body 121 is cancelled, the key body 121 moves back to the central position of the frame body until the limiting surface abuts against the limiting structure, and the key body 121 resets.

For example, in the case of a rectangular frame, the key groove can limit the movement of the key in the second direction and the third direction by indicating the width direction of the frame in the first direction, the length direction of the frame in the second direction, and the thickness direction of the frame in the third direction. The limiting structure limits the key to be separated from the key groove along the first direction. Therefore, the key groove is matched with the limiting structure, so that the position stability of the key in the frame is effectively guaranteed.

In some embodiments of the present disclosure, the key structure further comprises: the elastic member 140 is covered by the key body 121 in the first direction, has elasticity, and can provide an acting force for resetting the key body 121 after the acting force acting on the key body 121 is cancelled; the elastic member 140 is located in the mounting groove 122 of the frame.

When the key 120 is pressed, the key 120 compresses the elastic member 140, the key body 121 moves towards the center of the frame body, and the limiting surface 1221 is separated from the limiting structure; after the acting force applied to the key body 120 is cancelled, the elastic member 140 returns to deform and drives the key body 121 to reset.

The elastic piece is arranged on one side of the key body facing the circuit, and at least one elastic piece is arranged on one key. The keys comprise volume keys or power keys, and as volume keys, two elastic pieces can be arranged on the key body and respectively used for reducing volume and increasing volume, and if the keys are the power keys, only one elastic piece can be arranged on the key body.

The elastic member is, without limitation, a spring sheet, such as a steel sheet. The limiting structure can be made of rigid materials, such as metal or alloy, and the strength is better than that of plastic materials.

In other alternative embodiments, the keys 120 further include:

the flange 123, the flange 123 and the limiting lug 122 are respectively positioned at the opposite ends of the key body 121;

the flange 123 is located in the mounting groove 112 and is located on a different side of the mounting wall 114 having the key groove 113 from the key body 121, respectively.

In a specific example, as shown in fig. 2, 3 and 5, the limiting structure limits one end of the key body 121 by cooperating with the limiting lug 122, the flange 123 may hook the mounting wall 114 with the key slot 113 to limit the other end of the key body 121, and the flange 123 cooperates with the limiting structure to limit the movement of the key 120 along the first direction. Therefore, the limiting structure can be arranged at only one end of the key body 121. The other end of the key body 121 is restrained by the engagement of the flange with the mounting wall 114.

In other examples, when one mounting groove only corresponds to one key groove, the key body may not need to be provided with a flange, but only two limiting lugs are respectively arranged at two opposite ends of the key body, two limiting holes are arranged outside two ends of the mounting groove, and the movement of the key along the first direction is limited only by the limiting structure.

In other alternative embodiments, as shown in fig. 4 and 5, the limiting structure includes:

the stopper pin 130 has: the

middle parts

131 and 121 are positioned at the end parts of the two ends of the middle part, and the middle part 131 of the limiting pin 130 is contacted with the limiting lug 122;

one end 133 of the stopper pin 130 is located in the first stopper hole; the other end 132 of the spacing pin 130 is located at the bottom of the key 120, is inserted into the second spacing hole of the frame, and has an abutting surface 1321 opposite to the key 120.

As shown in fig. 2 and 4, the stopper pin 130 extends into the stopper hole 111 and the key groove 113. The end portion located in the limiting hole 111 at least limits the radial shaking of the limiting pin 130, i.e., the limiting hole 111 limits the movement of the limiting pin 130 in the first direction and the second direction. The bottom surface of the key groove 113 prevents the stopper pin 130 from going down further; the bottom surface of the key 120 abuts against the abutting surface 1321, so that the limit pin 130 is prevented from moving upwards, that is, the bottom surface of the key groove 113 and the key 120 limit the movement of the limit pin 130 along the third direction, and even if the frame body falls or collides in the transportation process, the limit pin 130 cannot be separated easily.

In practical application, the bottom surface of the key needs to be attached to the inner surface of the key groove, the second limiting hole can limit the end of the limiting pin to influence the installation of the key, the bottom surface of the key groove is enabled to be provided with a matching surface attached to the bottom surface of the key, the key is guaranteed to be placed stably, the second limiting hole can be a blind hole, and the second limiting hole limits the movement of the limiting pin along the third direction.

In order to ensure the reliability of assembly, when the key is not pressed, namely the elastic piece is not compressed, the key can shield the limiting hole, only part of the limiting hole is overlapped with the limiting lug, and at the moment, the limiting pin can not enter the limiting lug due to the blocking of the key; however, when the key is under the action force, the key cannot block the limiting hole, the limiting hole is completely overlapped with the limiting lug of the key body, and at the moment, the limiting pin can be smoothly inserted into the limiting lug.

Without limitation, the limiting pin can be made of metal or engineering plastics and other materials with better strength.

In other alternative embodiments, the outer diameters of the two end portions of the limit pin are larger than the outer diameter of the middle portion of the limit pin, and the outer diameters of the two end portions of the limit pin are smaller than or equal to the inner diameter of the limit hole.

As shown in fig. 4, the limiting pin 130 is a column with thick ends and thin middle, and when the limiting pin 130 is located in the limiting hole 111 and the limiting lug 122, the top of the limiting pin 130 is flush with the top surface of the frame 110, or slightly lower than the top surface of the frame 110, so as to reduce the influence on the subsequent assembly of the frame 110 and the battery case.

The outer diameter of the end part of the limiting pin is matched with the inner diameter of the limiting hole, so that the swinging of the limiting pin in the limiting hole is limited.

Except that the limiting lugs and the key body are respectively positioned on two sides of the limiting structure along the first direction, the key is limited by utilizing the butt joint mode. The key body can be limited by matching the self-locking structure on the key body with the limiting structure.

Illustratively, the limiting lug has elasticity, the limiting lug is bent to form a containing groove, the opening width of the containing groove is smaller than the outer diameter of the middle part of the limiting pin, and the limiting pin is inserted into the containing groove. At this time, the limiting lug and the key body can be positioned on the same side of the limiting structure along the first direction. When the key is installed, the key body can be pressed, the limiting structure utilizes the elasticity of the limiting lugs to expand the opening of the accommodating groove, the limiting structure enters the accommodating groove, and then is not easy to separate from the accommodating groove under the action of the elastic restoring force of the limiting lugs, so that the locking effect is achieved on the key body.

The self-locking structure is not limited to the accommodating groove formed by the elastic limiting lug, and self-locking structures with other structures can be adopted.

In other alternative embodiments, the limit pin is integrally formed with the frame body.

Besides the adoption of the split type limiting pin and the frame body, the limiting pin and the frame body can be formed into a one-piece structure. The structure can reduce the assembling steps of the limiting pin and the frame body, and is convenient to install and operate.

Without limitation, the stopper pin and the frame body may be integrally formed by machining or molding.

An embodiment of the present disclosure further provides a terminal, including:

the frame of any of the above embodiments;

the key structure according to any of the above embodiments.

In practical application, the frame body and the key structure can be preassembled in a mold factory, then the whole machine assembly is carried out in an assembly factory, the keys are fixed on the frame body by utilizing the limiting pin, the key structure and the frame body are not required to be additionally fixed by auxiliary materials, the reliability of the frame body and the key structure assembly body in the transportation process is improved, and the cost is saved.

In the embodiment of the present disclosure, the terminal includes a mobile terminal and a fixed terminal, and the mobile terminal includes but is not limited to: a mobile phone, a tablet computer, a notebook computer or wearable equipment, etc. Fixed terminals include, but are not limited to: desktop computers, televisions, displays, etc.

In other optional embodiments, the terminal further includes:

a wire 150, which is at least partially disposed in the mounting groove 112, is mounted on the blocking wall, and has connection terminals, which are opposite to the elastic member 140 and are spaced apart from each other;

after the key 120 is pressed, the key 120 moves to the center of the frame along the first direction, and drives the elastic member 140 to deform, and the elastic member 140 is electrically connected to the connection terminal of the circuit 150.

The line 150 may be, without limitation, a wire harness or a flat cable. For example, the line 150 is a flexible and foldable cord such as a PI (Polyimide) cord or an LCP (Liquid Crystal Polymer) cord. For another example, the wiring 150 is an FPC (Flexible Printed Circuit). The sealing can be more simply and conveniently formed by adopting the FPC wiring mode.

In other optional embodiments, the terminal further includes:

a battery cover mounted on the frame body to cover the mounting groove 112;

and the sealant is positioned between the battery cover and the frame 110 of the frame body and seals a gap between the battery cover and the frame 110 of the frame body.

In the embodiment of the present disclosure, when the battery case is assembled with the frame body, the battery case can be sealed by the sealant, and the sealing wind can cover only the top surface of the blocking wall of the frame 110, and the sealing position is located at the inner side of the mounting groove 112, compared with the top surface of the mounting wall, the effect is better. Or, cover both the top surfaces of the blocking walls and the top surfaces of the mounting walls of the frame 110.

The sealant may be a double-sided tape, such as foam tape. The sealant may also be an adhesive layer formed by curing the adhesive. For example: an epoxy resin adhesive.

Features disclosed in several of the product embodiments provided in the present application may be combined in any combination to yield new product embodiments without conflict.

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

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

Claims

1. A frame, comprising:

a frame;

the frame is provided with a key groove, a mounting groove and a limiting hole;

the key groove is used for installing a key;

2. The frame of claim 1, wherein the limiting hole comprises:

a first limit hole positioned at the top of the key slot,

3. A key structure, comprising:

a key, comprising: a key body and a limiting lug positioned at the end part of the key body, wherein the key body is positioned in the key groove of the frame body in the claim 1 or 2;

4. The key structure of claim 3, wherein the key further comprises:

5. The key structure according to claim 3, wherein said stopper structure comprises:

the spacer pin has: the middle part of the limiting pin is contacted with the limiting lug;

one end part of the limiting pin is positioned in the first limiting hole of the frame body; the other end part of the limiting pin is positioned at the bottom of the key, is inserted into the second limiting hole of the frame body and is provided with a butt joint surface opposite to the key.

6. The key structure according to claim 5, wherein the outer diameters of both end portions of the stopper pin are larger than the outer diameter of the middle portion of the stopper pin, and the outer diameters of both end portions of the stopper pin are smaller than or equal to the inner diameter of the stopper hole.

7. The key structure according to claim 5, wherein the stopper lug has elasticity, the stopper lug is bent to form a receiving groove having an opening width smaller than an outer diameter of a middle portion of the stopper pin, and the stopper pin is inserted into the receiving groove.

8. The key structure according to claim 3, wherein the limiting lug and the key body are respectively located on two sides of the limiting structure along the first direction.

9. The key structure of claim 5, wherein the limiting pin is integrally formed with the frame.

10. A terminal, comprising:

the frame of claim 1 or 2;

the key structure of any one of claims 3 to 9.