CN219659890U - Key assembly of earphone - Google Patents

Abstract

The utility model discloses a key assembly of an earphone, which comprises an expansion button, a reset spring, a spring fixing piece, a limiting piece, a main circuit board and an expansion circuit board. According to the expansion circuit board, the expansion key is arranged on the back surface of the expansion circuit board, the opening is formed in the main circuit board, the expansion circuit board is arranged on the opening, the expansion key faces the opening, the projection of the expansion button can penetrate through the opening to press the expansion key, the back surface space of the circuit board can be effectively utilized, the number of keys is increased reasonably, and the expansion circuit board is convenient for a user to use.

Description

Key assembly of earphone

Technical Field

The utility model relates to the technical field of earphone keys, in particular to a key assembly of an earphone.

Background

Nowadays, people pay more and more attention to exercise, in order to make exercise less boring or have a rhythmic feeling during exercise, many people like to listen to music during exercise, but when exercise items such as running are performed, shaking and sweating caused by a large amount of exercise often cause headphones to easily slide down from earholes, so that sports neck band headphones capable of being hung on the neck are liked by running lovers.

Typically, the key positions of the earphone on the circuit board are disposed on the front surface of the circuit board, and the corresponding operation buttons are disposed above the key positions of the circuit board. For example, patent 201921349725.6 discloses a neckband earphone in which the control keys 24 are facing the key positions of the underlying circuit board in fig. 2. However, the circuit board has a limited area, so that the number of settable keys is limited, and how to further expand the number of keys is very important.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide the key assembly of the earphone, which can effectively utilize the back space of the circuit board, reasonably increase the number of keys and is convenient for users to use.

In order to solve the technical problems, the utility model discloses a key assembly of an earphone, which comprises a shell, wherein the key assembly comprises an expansion button, a reset spring, a spring fixing piece, a limiting piece, a main circuit board and an expansion circuit board;

the main circuit board is provided with a first opening; the expansion circuit board is attached to the first opening on the main circuit board;

the side surface of the shell, which is opposite to the first opening, is provided with a second opening; the front side surface of the expansion button is provided with a first groove;

the expansion button is in sliding connection with the second opening, and the port edge of the first groove is positioned between the second opening and the main circuit board; the limiting piece is fixed at the port of the first groove, and the inner wall of the shell limits the limiting piece to enable the limiting piece to move between the inner wall of the shell and the main circuit board;

a bump is fixed on the bottom of the first groove; the return spring is sleeved on the protruding block and elastically abuts against the bottom of the first groove, the return spring also abuts against the spring fixing piece, and the spring fixing piece is fixed on the back surface of the main circuit board;

an expansion key position is arranged at the position, facing the first opening, of the back surface of the expansion circuit board; the bump can move along with the expansion button to press the expansion button.

As an alternative implementation manner, the front surface of the main circuit board is provided with a main key position, and the part of the main key position opposite to the shell is a main button for operating the main key position.

As a further alternative implementation manner, the front surface of the expansion circuit board is provided with a main key position, and the part of the main key position opposite to the shell is a main button for operating the main key position.

As yet another alternative embodiment, the expansion button is an axisymmetric rotating wheel, and the bump is a rotating shaft of the rotating wheel.

As a further alternative embodiment, the rotating wheel is provided with a through hole along the direction of the symmetry axis, and three layers of optical structures are embedded in the through hole along the axial direction;

the first layer of the optical structure is a glass light-transmitting layer; the second layer of the optical structure is a matte astigmatic film; the third layer of the optical structure is a PC light guide plate;

and the fixed end of the convex block on the expansion button is fixed on the third layer of the optical structure.

As a further alternative embodiment, the limiting member is a clip spring; the middle part of the spring fixing piece is a through hole for the convex block to pass through, and a second groove is formed in the through hole of the spring fixing piece;

the mode of the return spring abutting against the spring fixing piece is specifically as follows: the reset spring is abutted against the bottom of the second groove;

the fixing plate which extends outwards from the periphery of the spring fixing piece or the periphery of the spring fixing piece is fixed on the back surface of the main circuit board.

As yet another alternative embodiment, the spring fixture is an angular displacement encoder for measuring the rotation angle of the boss.

Compared with the prior art, the embodiment of the utility model has the following beneficial effects:

according to the embodiment of the utility model, the expansion key is arranged on the back surface of the expansion circuit board, the opening is arranged on the main circuit board, the expansion circuit board is arranged on the opening, and the expansion key faces the opening, so that the projection of the expansion button can penetrate through the opening to press the expansion key, the back surface space of the circuit board can be effectively utilized, the number of keys is increased reasonably, and the expansion key is convenient for a user to use; in practical application, the length of the lug can be adaptively adjusted according to practical conditions to influence the pressing depth, so that the pressing speed and the pressing false touch frequency are adjusted, and the use of a user is facilitated.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a section at a key assembly of an earphone according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a key assembly according to an embodiment of the present utility model;

fig. 3 is a schematic diagram of a back structure of a main circuit board according to an embodiment of the present utility model.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-3, an embodiment of the utility model discloses a key assembly 1 of an earphone, the earphone comprises a shell 2, the key assembly 1 comprises an expansion button 11, a return spring 12, a spring fixing piece 13, a limiting piece 14, a main circuit board 15 and an expansion circuit board 16;

the main circuit board 15 is provided with a first opening; the expansion circuit board 16 is attached to the main circuit board 15 at the first opening;

the side surface of the shell 2, which is opposite to the first opening, is provided with a second opening; the front side surface of the expansion button 11 is provided with a first groove;

the expansion button 11 is slidably connected with the second opening, and the port edge of the first groove is located between the second opening and the main circuit board 15; the limiting piece 14 is fixed at the port of the first groove, and the inner wall of the shell 2 limits the limiting piece 14, so that the limiting piece 14 moves between the inner wall of the shell 2 and the main circuit board 15;

a bump 17 is fixed on the bottom of the first groove; the return spring 12 is sleeved on the protruding block 17 and elastically abuts against the bottom of the first groove, the return spring 12 also abuts against the spring fixing piece 13, and the spring fixing piece 13 is fixed on the back surface of the main circuit board 15;

an expansion key position 18 is arranged on the back surface of the expansion circuit board 16 facing the first opening; the bump 17 can move along with the expansion button 11 to press the expansion button 18.

In this embodiment, the extended key 18 includes a key spring and a pad (not shown in the drawing) of the extended circuit board 16 under the key spring. In fig. 1 and 2, 19 is an annular structure for reducing the contact area between the button and the wall surface of the opening.

It should be noted that, the extended circuit board 16 may be attached to the main circuit board 15 by using an SMT patch technology, so that the pads of the extended circuit board 16 and the corresponding pads of the main circuit board 15 are electrically connected, and thus, the power supply is connected through the main circuit board 15 and connected to related circuits according to actual application conditions.

According to the embodiment of the utility model, the expansion key 18 is arranged on the back surface of the expansion circuit board 16, the expansion circuit board 16 is arranged above the opening by arranging the opening on the main circuit board 15, the expansion key 18 faces the opening, so that the projection 17 of the expansion button 11 can penetrate through the opening to press the expansion key 18, the back surface space of the circuit board can be effectively utilized, the number of keys is increased reasonably, and the use of users is convenient; in practical application, the length of the bump 17 can be adaptively adjusted according to practical situations to affect the pressing depth, so as to adjust the pressing speed and the pressing false touch frequency, and facilitate the use of users.

In an alternative embodiment, the front surface of the main circuit board 15 is provided with a main key (not shown in the drawing), and the portion of the main key facing the housing 2 is a main button for operating the main key.

In yet another alternative embodiment, the front surface of the expansion circuit board 16 is provided with a main key (not shown in the drawing), and the portion of the main key facing the housing 2 is a main button for operating the main key.

In yet another alternative embodiment, referring to fig. 2, the expansion button 11 is an axisymmetric wheel, and the protrusion 17 is a rotation axis of the wheel; the expansion key of the embodiment can rotate, and if the expansion key is matched with the angular displacement encoder, the pressing and rotating double-acting operation function can be realized.

In a further alternative embodiment, the rotating wheel is provided with a through hole along the direction of the symmetry axis, and three layers of optical structures are embedded in the through hole along the axial direction;

the first layer of the optical structure is a glass light-transmitting layer 20; the second layer of the optical structure is a matte astigmatic film 21; the third layer of the optical structure is a PC light guide plate 22;

the fixed end of the projection 17 on the expansion button 11 is fixed on the third layer of the optical structure.

In yet another alternative embodiment, the stop 14 is a snap spring; the middle part of the spring fixing piece 13 is a through hole for the projection 17 to pass through, and a second groove is formed in the through hole of the spring fixing piece 13;

the manner in which the return spring 12 abuts against the spring fixing member 13 is specifically: the return spring 12 abuts against the bottom of the second groove;

the fixing plate which is protruded outward around the spring fixing member 13 or around the periphery thereof is fixed to the back surface of the main circuit board 15.

In yet another alternative embodiment, the spring holder 13 is an angular displacement encoder for measuring the rotation angle of the projection 17. Optionally, the angular displacement encoder can be connected with a processor of the earphone, and the volume of the earphone can be controlled by analyzing the rotation angle through the processor, so that the volume control button function is realized.

The disclosure of the embodiments of the present utility model is merely a preferred embodiment of the present utility model, and is merely for illustrating the technical scheme of the present utility model, but not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that; the technical scheme recorded in the various embodiments can be modified or part of technical features in the technical scheme can be replaced equivalently; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims (7)

1. The key assembly of the earphone comprises a shell and is characterized by comprising an expansion button, a reset spring, a spring fixing piece, a limiting piece, a main circuit board and an expansion circuit board;

the main circuit board is provided with a first opening; the expansion circuit board is attached to the first opening on the main circuit board;

the side surface of the shell, which is opposite to the first opening, is provided with a second opening; the front side surface of the expansion button is provided with a first groove;

the expansion button is in sliding connection with the second opening, and the port edge of the first groove is positioned between the second opening and the main circuit board; the limiting piece is fixed at the port of the first groove, and the inner wall of the shell limits the limiting piece to enable the limiting piece to move between the inner wall of the shell and the main circuit board;

a bump is fixed on the bottom of the first groove; the return spring is sleeved on the protruding block and elastically abuts against the bottom of the first groove, the return spring also abuts against the spring fixing piece, and the spring fixing piece is fixed on the back surface of the main circuit board;

an expansion key position is arranged at the position, facing the first opening, of the back surface of the expansion circuit board; the bump can move along with the expansion button to press the expansion button.

2. The key assembly according to claim 1, wherein a main key position is provided on a front surface of the main circuit board, and a portion of the main key position facing the housing is a main button for operating the main key position.

3. The key assembly according to claim 1, wherein a main key position is provided on the front surface of the expansion circuit board, and a portion of the main key position facing the housing is a main button for operating the main key position.

4. The key assembly of claim 1, wherein the expansion button is an axisymmetric wheel and the projection is a rotation axis of the wheel.

5. The key assembly according to claim 4, wherein the wheel is provided with a through hole along the direction of the symmetry axis, and three layers of optical structures are axially embedded in the through hole;

the first layer of the optical structure is a glass light-transmitting layer; the second layer of the optical structure is a matte astigmatic film; the third layer of the optical structure is a PC light guide plate;

and the fixed end of the convex block on the expansion button is fixed on the third layer of the optical structure.

6. The key assembly of claim 1, wherein the limiting member is a snap spring; the middle part of the spring fixing piece is a through hole for the convex block to pass through, and a second groove is formed in the through hole of the spring fixing piece;

the mode of the return spring abutting against the spring fixing piece is specifically as follows: the reset spring is abutted against the bottom of the second groove;

the fixing plate which extends outwards from the periphery of the spring fixing piece or the periphery of the spring fixing piece is fixed on the back surface of the main circuit board.

7. The key assembly of claim 6, wherein the spring mount is an angular displacement encoder for measuring the rotation angle of the boss.