CN109449038B

CN109449038B - Key device and electronic product

Info

Publication number: CN109449038B
Application number: CN201811561182.4A
Authority: CN
Inventors: 刘金锋; 王经洲; 韩六二
Original assignee: Tonly Electronics Holdings Ltd
Current assignee: Tonly Electronics Holdings Ltd
Priority date: 2018-12-19
Filing date: 2018-12-19
Publication date: 2022-05-03
Anticipated expiration: 2038-12-19
Also published as: CN109449038A

Abstract

The invention discloses a key device and an electronic product, wherein the key device comprises a key frame, wherein the key frame is provided with a positioning hole, and the positioning hole extends outwards to form an installation boss; the key component comprises a key and a key sleeve which are connected, the key sleeve is sleeved outside the mounting boss, an elastic deformation area is arranged at the position, close to the mounting boss, of the key sleeve, and the key penetrates through the positioning hole; the front shell is connected to the key frame, the front shell is provided with a mounting hole for the mounting boss to pass through, and the front shell is matched with the key frame to clamp the key component; the technical scheme of the invention enables the key to be centered, avoids key clamping, enables the surface of the key not to be easily damaged, and is convenient to install and low in cost.

Description

Key device and electronic product

Technical Field

The present invention relates to the field of electronic products, and in particular, to a key device and an electronic product using the same.

Background

Nowadays, electronic products are more and more popular, such as: sound boxes, radios, game consoles, music boxes, etc., while key devices are an indispensable part of electronic products.

The existing key device generally comprises a key and a mounting bracket, wherein the mounting bracket is usually plastic or aluminum profile, the key is mounted on the mounting bracket, the key can deflect when being pressed down and can rub against the inner wall of the aluminum profile after sinking, so that the key can be clamped and cannot rebound, and in the key structure, the key is easy to be not centered. Moreover, the button can directly contact with aluminium alloy or plastic support, has the sharp edge of aluminium alloy or plastic support and the condition that the button takes place to rub or scrape in the equipment in-process, leads to button surface outward appearance impaired easily. In addition, when the mounting bracket is directly assembled with the key, in order to match the shape of the key, a chamfer needs to be additionally arranged when the mounting bracket is provided with the mounting hole, the processing process of the chamfer is complex, the processing difficulty is high, and the cost of the whole device is high.

Therefore, it is necessary to provide a key device that can center the key, avoid the key from being stuck, prevent the surface of the key from being damaged, and have convenient installation and low processing cost.

Disclosure of Invention

The invention mainly aims to provide a key device, which aims to solve the problems that the key is not easy to center and is blocked in the pressing process,

in order to achieve the above object, the present invention provides a key device comprising:

the key frame is provided with a mounting hole, and the periphery of the mounting hole extends outwards to form a mounting boss;

the key component comprises a key and a key sleeve which are connected, the key sleeve is sleeved outside the mounting boss, an elastic deformation area is arranged at a position, close to the mounting boss, of the key sleeve, and the key penetrates through the mounting hole; and

the front shell is connected to the key frame, a through hole for the installation boss to penetrate through is formed in the front shell, and the front shell is matched with the key frame to clamp the key component.

Preferably, the corner position of the front shell is provided with a positioning column, the key frame is provided with a positioning hole corresponding to the positioning column, and the positioning column is inserted into the positioning hole.

Preferably, the positioning columns are arranged at four corners of the front shell, and the number of the positioning holes is the same as that of the positioning columns.

Preferably, the gap D1 between two of the four positioning columns at one diagonal line and the hole wall of the matched positioning hole is 0.05mm, and the gap D2 between two of the four positioning columns at the other diagonal line and the hole wall of the matched positioning hole is 0.3 mm.

Preferably, the key frame is made of hard glue, and the key component is made of soft glue.

Preferably, the key frame and the key part adopt a two-shot injection molding process.

Preferably, the button device further comprises a microphone circuit board, the microphone circuit board is arranged between the front shell and the button frame, and the microphone circuit board corresponds to the button part position and is provided with a yielding hole for the button part to pass through.

Preferably, a silica gel gasket is arranged between the microphone circuit board and the front shell.

The invention also provides an electronic product which comprises a key device and the PCB, wherein the PCB is connected with the key device, the key device is abutted against a switch on the PCB under the action of external force, and the key device is as above.

Preferably, the switch is made of soft rubber.

According to the technical scheme, the key frame is provided with the mounting hole, the periphery of the mounting hole extends outwards to form the mounting boss, the key component is arranged into the key and the key sleeve which are connected, the key sleeve is sleeved outside the mounting boss, the position, close to the mounting boss, of the key sleeve is provided with the elastic deformation area, the key penetrates through the mounting hole, the front shell provided with the through hole for the mounting boss and the key sleeve to penetrate through is connected with the key frame, the front shell is matched with the key frame to clamp the key component, the structural arrangement of the elastic wall of the key in the prior art is omitted, the key is kept in the middle in the pressing process, the key is prevented from being clamped, the surface of the key is not easily damaged, meanwhile, the mounting is convenient, and the processing cost is reduced.

Drawings

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

FIG. 1 is a schematic overall structure diagram of a key device according to an embodiment of the present invention;

FIG. 2 is an exploded view of the key assembly of FIG. 1;

FIG. 3 is a cross-sectional view of the key device shown in FIG. 1;

FIG. 4 is another schematic cross-sectional view of the key device shown in FIG. 1;

FIG. 5 is a partial schematic view of the key assembly of FIG. 4;

FIG. 6 is another partial pictorial illustration of the key device of FIG. 4;

the reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				1	Key frame	3	Front shell
11	Mounting hole	31	Positioning column
				12	Mounting boss	32	Through hole
13	Locating hole	4	PCB board
				2	Key component	41	Switch with a switch body
21	Push-button	5	Microphone circuit board
				22	Key sleeve	51	Hole of stepping down
221	Elastic deformation zone	6	Silica gel gasket

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a key device which is used for triggering a switch on a PCB under the action of external force so as to realize the function of a key.

Referring to fig. 1, fig. 2 and fig. 3, in an embodiment of the present invention, the key device includes: the key assembly comprises a key frame 1, a key component 2 and a front shell 3, wherein the key frame 1 is provided with a mounting hole 11, and the periphery of the mounting hole 11 extends outwards to form a mounting boss 12; the key component 2 comprises a key 21 and a key sleeve 22 which are connected, the key sleeve 22 is sleeved outside the mounting boss 12, an elastic deformation area is arranged at the position, close to the mounting boss 12, of the key sleeve 22, and the key 21 penetrates through the mounting hole 11; the front shell 3 is connected to the key frame 1, and the front shell 3 is provided with a through hole 32 for the mounting boss 12 and the key sleeve 22 to pass through, and the front shell 3 is matched with the key frame 1 to clamp the key component 2.

In the embodiment of the invention, the key frame 1 is mainly used for installing and supporting the key component 2, the key frame 1 comprises a square outer frame and a circular inner frame, and the key frame 1 is divided into two parts, so that the key frame is convenient to machine and form, and the machining process is simplified. More specifically, the outer frame is provided with a groove matched with the shape of the inner frame, the inner frame embedding part is arranged in the groove, and the mounting hole 11 is arranged on the outer frame and surrounded by the inner frame. In addition, in the embodiment of the present invention, the diameter of the key 21 is smaller than the diameter of the mounting hole 11, so that the key 21 does not rub against the inner wall of the mounting boss 12 during the downward pressing process of the key device under the external force, thereby preventing the key 21 from being stuck and the surface of the key 21 from being damaged. In addition, in the embodiment of the present invention, the front shell 3 is similar to a cover body for installing and protecting the key frame 1 and the key element 2, and specifically, the front shell 3 is composed of a top wall and a side wall surrounding the top wall to form an accommodating groove, wherein the top wall is provided with a through hole 32 for the installation boss 12 and the key sleeve 22 to pass through, the key element 2 and the key frame 1 are embedded in the accommodating groove, for the convenience of the installation boss 12 and the key sleeve 22 to pass through the through hole 32, and the hole wall of the installation hole 11 located inside is chamfered to facilitate alignment when the key frame 1 and the key element 2 are installed on the front shell 3.

According to the technical scheme, the key frame 1 is provided with the mounting hole 11, the periphery of the mounting hole 11 extends outwards to form the mounting boss 12, the key component 2 is provided with the connected key 21 and the key sleeve 22, wherein the key sleeve 22 is sleeved outside the mounting boss 12, the position, close to the mounting boss 12, of the key sleeve 22 is provided with the elastic deformation area, the key 21 penetrates through the mounting hole 11, the front shell 3 provided with the through hole 32 for the mounting boss 12 and the key sleeve 22 to penetrate through is connected with the key frame 1, the front shell 3 is matched with the key frame 1 to clamp the key component 2, the structural arrangement of an elastic wall of the existing key 21 is cancelled in the scheme, the key 21 is kept in the middle in the pressing process, the key is prevented from being clamped, the surface of the key 21 is not easy to damage, meanwhile, the mounting is convenient, and the processing cost is also reduced.

Preferably, the corner position of the front housing 3 is provided with a positioning column 31, the key frame 1 is provided with a positioning hole 13 corresponding to the positioning column 31, and the positioning column 31 is inserted into the positioning hole 13. In this embodiment, after the key assembly 2 is sleeved on the mounting boss 12 of the key frame 1 through the key sleeve 22, the key frame 1 and the key assembly 2 are mounted on the front housing 3, it can be understood that there is no positioning structure, it is difficult to ensure the precise matching of the key frame 1, the key assembly 2 and the front housing 3, so that the key 21 may be deflected during the pressing process, and the matching of the positioning column 31 and the positioning hole 13 can ensure the precise alignment of the key frame 1 and the key assembly 2 when mounted on the front housing 3.

In order to further improve the installation accuracy, please refer to fig. 2, fig. 4 and fig. 5, the positioning posts 31 are disposed at four corners of the front housing 3, and the number of the positioning holes is the same as the number of the positioning posts, so that the key frame 1 and the key component 2 are more convenient and accurate to align when being installed on the front housing 3. In more detail, the clearance D1 between two positioning pillars 31 in a diagonal line of the four positioning pillars 31 and the hole wall of the matching positioning hole 13 is 0.05 mm. It can be understood that the setting of a plurality of reference columns 31 that are located four corners of preceding shell 3 can improve and pair the precision, and two reference columns 31 that are in a diagonal are 0.05mm with the clearance D1 of the pore wall of matched with locating hole 13, and then make key frame 1 accurate with preceding shell 3, and two reference columns 31 are in a diagonal, have avoided taking place to rotate between key frame 1 and the preceding shell 3, guarantee the stability of installation effect.

Further, referring to fig. 2, fig. 4, fig. 5 and fig. 6, a gap D2 between two positioning pillars 31 of the four positioning pillars 31 located on another diagonal line and the hole wall of the corresponding positioning hole 13 is 0.3 mm. It can be easily understood that if the gaps between the four positioning columns 31 and the hole walls of the matched positioning holes 13 are all set to be 0.05mm, the key frame 1 and the front shell 3 are installed and matched too tightly, so that the installation in the early stage and the disassembly in the later stage are not convenient, and therefore the gaps D2 between the two positioning columns 31 on the other diagonal line and the hole walls of the matched positioning holes 13 are 0.3mm, and the loose matching effect of the key frame 1 and the front shell 3 is realized.

Next, the materials of the key frame 1 and the key part 2 will be described, in which the key frame 1 is made of hard glue, and the key part 2 is made of soft glue. In this embodiment, the key frame 1 is made of ABS plastic, but may also be made of PS plastic, AS plastic, hard PVC, or other hard glue materials; the key component 2 is made of soft rubber TPU, and in other embodiments, other soft rubber materials such as soft rubber PVC and silica gel can be adopted. So set up for key frame 1 can not move in the button 21 pressing process, what extruded is button cover 22 and button 21, has avoided button 21 to scrape the condition of preceding shell 3, thereby avoids the problem of button 21 card key. In addition, the key component 2 is made of soft rubber, so that the key 21 is convenient for an operator to press the key, and meanwhile, the key component 2 is made of soft rubber, so that the hand feeling is improved.

In order to realize mass production, the key frame 1 and the key part 2 adopt a double-injection molding process. It can be understood that the hard glue and the soft glue part are respectively formed in the two die cavities, the matching precision of the processed key frame 1 and the key part 2 cannot be guaranteed, the rejection rate of products is higher, the hard glue and the soft glue are formed in one die cavity by the double-injection molding process, the processing precision is guaranteed, mass production can be realized, the production die is simplified, and the production cost is reduced.

Further, referring to fig. 2, the key device further includes a microphone circuit board 5, the microphone circuit board 5 is disposed between the front shell 3 and the key frame 1, and a yielding hole 51 for the key component 2 to pass through is formed in a position of the microphone circuit board 5 corresponding to the key component 2. By the arrangement, the function of the key device is enhanced, so that the key device can be used for answering voice.

In order to avoid the damage of the front shell 3 to the surface of the microphone circuit board 5, a silicone gasket 6 is arranged between the microphone circuit board 5 and the front shell 3. It can be understood that in the installation process, the silica gel gasket 6 has a buffering effect, the front shell 3 is prevented from directly abutting against the surface of the microphone circuit board 5, and the surface of the microphone circuit board 5 is protected. It should be noted that the present invention is not limited to this, and in other embodiments, a rubber gasket or other elastic material may be used.

The present invention further provides an electronic product, which includes a key device and a PCB 4, and the specific structure of the key device refers to the above embodiments, and since the electronic product adopts all technical solutions of all the above embodiments, the electronic product at least has all beneficial effects brought by the technical solutions of the above embodiments, and details are not repeated herein. The PCB 4 is connected to the button device, and the button device abuts against the switch 41 on the PCB 4 under the action of external force to trigger the switch 41, and the electronic product in this application may be a sound box, a radio, a music box, etc., and certainly, may also be other electronic products that need to use the button device in the using process, such as a game machine, a remote controller, etc.

Further, the switch 41 is made of soft rubber, in this embodiment, the switch 41 is also made of soft rubber TPU, and thus the button 21 vibration-proof EVA of the existing button device is eliminated, the production cost and the assembly process cost are saved, and meanwhile, the hand feeling of the button 21 is also improved. It should be noted that, in other embodiments, the switch 41 may also be made of other soft rubber materials such as soft rubber PVC, silica gel, and the like.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A key device, comprising:

the front shell is connected to the key frame, a through hole for the installation boss and the key sleeve to pass through is formed in the front shell, and the front shell is matched with the key frame to clamp the key component;

the corner position of the front shell is provided with a positioning column, the key frame is provided with a positioning hole corresponding to the positioning column, and the positioning column is inserted into the positioning hole.

2. The key device of claim 1, wherein the positioning posts are disposed at four corners of the front housing, and the number of the positioning holes is the same as that of the positioning posts.

3. The key device of claim 2, wherein the clearance D1 between two of the four positioning posts at one diagonal and the wall of the mating positioning hole is 0.05mm, and the clearance D2 between two of the four positioning posts at the other diagonal and the wall of the mating positioning hole is 0.3 mm.

4. The key device of claim 1, wherein the key frame is made of a hard glue material, and the key member is made of a soft glue material.

5. The key device of claim 4, wherein the key frame and the key element are formed by a two-shot injection molding process.

6. The key device according to any one of claims 1 to 5, further comprising a microphone circuit board disposed between the front case and the key frame, wherein the microphone circuit board is provided with a yielding hole corresponding to the key component for the key component to pass through.

7. The key device of claim 6, wherein a silicone gasket is disposed between the microphone circuit board and the front housing.

8. An electronic product, comprising a key device and a PCB, wherein the PCB is connected to the key device, the key device abuts against a switch on the PCB under an external force, and the key device is according to any one of claims 1 to 7.

9. The electronic product of claim 8, wherein the switch is made of soft plastic.