CN202068311U

CN202068311U - Flat linear vibrator

Info

Publication number: CN202068311U
Application number: CN2011201592681U
Authority: CN
Inventors: 杨鑫峰; 江超
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2011-05-18
Filing date: 2011-05-18
Publication date: 2011-12-07
Anticipated expiration: 2021-05-18

Abstract

The utility model discloses a flat linear vibrator, which comprises an external frame, an electromagnet, a vibrating unit and elastic pieces. The vibrating unit comprises a mass block. An open slot which runs through the upper surface and the lower surface of the mass block is arranged on the mass block. Permanent magnets are respectively installed at the two ends of the open slot. The electromagnet is arranged in the open slot and between the permanent magnets. Since two elastic arms are bent into a U-shape, stresses produced during vibration can be better reduced and the fatigue life of the elastic pieces can be improved; since the open slot is arranged on the mass block, compared with the original mass block, the shape is different, an open-loop electromagnet holding area is formed, the electromagnet holding space is increased, the turns of a solenoid and the length of lines can be effectively increased, and the flat linear vibrator can provide stronger electromagnetic force; and under the requirement of the same electromagnetic force, the design size of the product is smaller, the overall volume of the product is reduced and the miniaturization of the designed product is facilitated.

Description

The flat linear vibrating device

Technical field

The utility model relates to the vibrator field, relates in particular to a kind of vibration steadily, can increase flat linear vibrating device inner space simultaneously, increases the solenoid line length and the number of turn, improves the flat linear vibrating device of electromagnetic force.

Background technology

The development of portable terminal consumer electronics product, as at mobile phone, handheld device, guider or palm multimedia entertainment equipment etc., a large amount of resonator devices is employed as vibrational feedback, and resonator device commonly used mainly comprises columnar iron core vibrator, drag cup vibrator and flat linear vibrating device etc.

The general in the vertical direction vibration of the flat linear vibrating device of traditional structure was the disclosed technical scheme of Chinese patent ZL200480000815.4 on November 01st, 2010 as open day.It is that vibrator reserves enough oscillation spaces that this design needs in the vertical direction, miniaturized design along with the portable terminal consumer electronics product, the product component that needs is littler, and the flat linear vibrating device of this traditional structure is difficult to realize the microminiaturization of product design.

In further improvement to the flat linear vibrating device of above-mentioned traditional structure, open day be on November 01st, 2010 disclosed Korean Patent document KR1020090034984 a kind of flat linear vibrating device of horizontal vibration is disclosed, adopt the mass (mass is provided with the permanent magnet that is oppositely arranged with electromagnet) of solenoid actuated annular to carry out horizontal vibration.This design has improved the defective of the flat linear vibrating device existence of above-mentioned traditional vertical vibrating, has reduced the product height, but the design of the mass of this employing loop configuration, the gravity of mass is far away from the distance of flexure strip, causes unsettled vibration easily; Owing to adopt the mass design of annular, the accommodation space of electromagnet is less, has limited solenoidal line length, is unfavorable for the further raising of electromagnetic force performance, under identical electromagnetic force performance requirement, is unfavorable for the microminiaturization of product design simultaneously.

So, be necessary the flat linear vibrating device of said structure is further improved, to avoid above-mentioned defective.

Summary of the invention

Technical problem to be solved in the utility model is: a kind of flat linear vibrating device that the stable vibration performance can be provided is provided, can increases the accommodation space of electromagnet simultaneously, increase the solenoidal number of turn and line length, stronger electromagnetic force is provided; Under identical electromagnetic force performance demands, can reduce the product design size, help the microminiaturization of product design.

For solving the problems of the technologies described above, the technical solution of the utility model is: the flat linear vibrating device comprises:

External frame, described external frame forms the installing space of the internal components of described flat linear vibrating device;

Electromagnet, described electromagnet are fixed on the described external frame, and described electromagnet comprises fixed support, solenoid and iron core, and described solenoid is set on the described iron core;

Vibration unit, described vibration unit comprise mass and are installed in the permanent magnet that at least one pair of the identical polar end on the described mass is oppositely arranged that the polar end that the polar end of described permanent magnet and the induction of described electromagnet are produced is oppositely arranged;

Be installed in the flexure strip that resilient support is provided for described vibration unit between described external frame and the described vibration unit;

Described mass is provided with the fluting that connects described mass upper and lower surface, is separately installed with described permanent magnet at the two ends of described fluting, and described electromagnet is arranged in the described fluting and between the described permanent magnet

As a kind of improvement, described mass is a rectangle, and described mass has the first relative long side and second long side, and described fluting is arranged on first long side of described mass.

As a kind of improvement, described flexure strip comprises:

Central part, described central part are fixed in second long side of described mass;

Draw by the two ends of described central part respectively and first elasticity arm of symmetrically arranged U-shaped bending and second elasticity arm of U-shaped bending, described first elasticity arm and described second elasticity arm lay respectively between described mass short brink and the described external frame, and the end of described first elasticity arm and second elasticity arm is individually fixed on the described external frame.

As a kind of improvement, described external frame comprises shell and the loam cake and the lower cover that connect with described casing cover respectively.

After having adopted technique scheme, the utility model helps to improve flexure strip fatigue life because the bending that takes the shape of the letter U of two elasticity arms more helps alleviating the stress that produces in the vibration processes; Owing on mass, be provided with fluting, compare with the mass of original annular, shape is different and constituted the electromagnet holding area of an open loop, has increased the accommodation space of electromagnet, can effectively increase the solenoidal number of turn and line length, make the utility model that stronger electromagnetic force can be provided; Under identical electromagnetic force performance demands, the utility model product design size is less, and the product overall volume reduces, and helps the microminiaturization of product design.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the STRUCTURE DECOMPOSITION schematic diagram of the utility model embodiment;

Fig. 2 is the structural representation of the utility model embodiment mass;

Fig. 3 is the structural representation of the utility model embodiment flexure strip;

Fig. 4 is the structural representation of the utility model embodiment electromagnet;

Fig. 5 is the utility model embodiment working state schematic representation;

Among the figure: the 11-loam cake; The 12-shell; The 13-lower cover; The 20-mass; 21-first long side; 22-second long side; The 23-fluting; The 30-flexure strip; The 31-central part; 32-first elastic arm; 33-second elasticity arm; The 40-electromagnet; The 41-iron core; The 42-solenoid; The 43-fixed support; The 50-permanent magnet.

Embodiment

In the following description, only the mode by explanation is described some one exemplary embodiment of the present utility model, undoubtedly, those of ordinary skill in the art can recognize, under the situation that does not depart from spirit and scope of the present utility model, can revise described embodiment with various mode.Therefore, accompanying drawing and be described in just illustratively in essence rather than is used to limit the protection range of claim.In addition, in this manual, identical Reference numeral indicates identical part.

As shown in Figure 1, the flat linear vibrating device that present embodiment provided is whole for square, comprises the external frame, electromagnet 40, vibration unit and the flexure strip 30 that are used to hold flat linear vibrating device internal components.

External frame comprises shell 12 and the loam cake 11 and the lower cover 13 that connect with shell 12 lids.One side of loam cake 11 and lower cover 13 is provided with the flanging that forms 12 two opposing sidewalls of shell respectively.

Electromagnet 40 is installed on shell 12 bottom interior wall, the fixed support 43 that comprises iron core 41, is set in the solenoid 42 on the iron core 41 and is used to install and fix.

Vibration unit comprises mass 20 and is installed in the permanent magnet 50 that at least one pair of the identical polar end on the mass 20 is oppositely arranged that the polar end that the polar end of permanent magnet 50 and electromagnet induction are produced is oppositely arranged;

Flexure strip 30 is installed between external frame and the vibration unit and provides resilient support for vibration unit.

As shown in Figure 2,

Mass 20 is provided with the fluting 23 that connects mass 20 upper and lower surfaces, is separately installed with permanent magnet 50 at the two ends of fluting 23, and electromagnet 40 is arranged in the fluting 23 and between the permanent magnet 50.Mass 20 is a rectangle, and mass 20 has the first relative long side 21 and second long side 22, and fluting 23 is arranged on first long side 21 of mass 20.

Mass 30 is that non-magnetic conductive material and density are greater than 7.8g/cm ³

As shown in Figure 3, flexure strip comprises

Central part 31, central part 31 are fixed in second long side 22 of mass 20;

Draw by the two ends of central part 31 respectively and first elasticity arm 32 of symmetrically arranged U-shaped bending and second elasticity arm 33 of U-shaped bending, first elasticity arm 32 and described second elasticity arm 33 lay respectively between mass 20 short brinks and the external frame, and the end of first elasticity arm 32 and second elasticity arm 33 is individually fixed on the external frame.

As shown in Figure 4, the fixed support 43 that electromagnet 40 comprises iron core 41, is set in the solenoid 42 on the iron core 41 and is used to install and fix, one end of solenoid 42 is provided with lead-in wire, and fixed support 43 makes the electromagnet secure bond by being installed on the external frame.

As shown in Figure 5, the end of first elasticity arm 32 of flexure strip 30 and second elasticity arm 33 combines with the shell 12 of external frame respectively.The central part 31 of flexure strip 30 combines with second long side 22 of mass body 22, and mass 30 is arranged between two elasticity arms of flexure strip 30.Electromagnet 40 is positioned at the fluting 23 of mass 20, and two permanent magnets 50 on the mass 20 lay respectively at electromagnet 40 both sides.

When being connected with alternating current in the electromagnet 4, produce the active force that attracts each other between one polar end of electromagnet and the mutually close permanent magnet, produce the active force that repels mutually between another polar end and its mutually close permanent magnet, the direction of two active forces is identical, and vibration unit is vibrated to a direction; When being connected with the opposite sense of current in the electromagnet 4, vibration unit can be subjected to rightabout active force, thereby makes vibration unit produce double vibrations, produces the sense of shaking.

The utility model helps to improve flexure strip fatigue life because the bending that takes the shape of the letter U of two elasticity arms more helps alleviating the stress that produces in the vibration processes; Owing on mass, be provided with fluting, compare with the mass of original annular, shape is different and constituted the electromagnet holding area of an open loop, has increased the accommodation space of electromagnet, can effectively increase the solenoidal number of turn and line length, make the utility model that stronger electromagnetic force can be provided; Under identical electromagnetic force performance demands, the utility model product design size is less, and the product overall volume reduces, and helps the microminiaturization of product design.

More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; under the prerequisite that does not break away from the utility model spirit and scope, the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof

Claims

1. flat linear vibrating device comprises:

It is characterized in that,

Described mass is provided with the fluting that connects described mass upper and lower surface, is separately installed with described permanent magnet at the two ends of described fluting, and described electromagnet is arranged in the described fluting and between the described permanent magnet.

2. flat linear vibrating device as claimed in claim 1 is characterized in that, described mass is a rectangle, and described mass has the first relative long side and second long side, and described fluting is arranged on first long side of described mass.

3. flat linear vibrating device as claimed in claim 2 is characterized in that, described flexure strip comprises:

4. flat linear vibrating device as claimed in claim 1 is characterized in that, described external frame comprises shell and the loam cake and the lower cover that connect with described casing cover respectively.