CN216357216U

CN216357216U - Elastic sheet and bone conduction sound production device

Info

Publication number: CN216357216U
Application number: CN202122464232.0U
Authority: CN
Inventors: 沈佳龙; 陈娟
Original assignee: Suzhou Suoye Electronic Technology Co ltd
Current assignee: Suzhou Suoye Electronic Technology Co ltd
Priority date: 2021-10-13
Filing date: 2021-10-13
Publication date: 2022-04-19
Anticipated expiration: 2031-10-13

Abstract

The utility model discloses a shrapnel and a bone conduction sound production device, wherein the shrapnel comprises: a body (2); the outer support (1) is arranged on the outer side of the body (2), and a spacing space (4) is formed between the outer support (1) and the body (2); and the connecting piece (3) is arranged in the spacing space (4), the connecting piece (3) comprises a first arm part (320) connected with the outer support (1) and a second arm part (321) connected with the body (2), and at least parts of the first arm part (320) and the second arm part (321) are arranged oppositely. The elastic sheet has better fatigue resistance, is not easy to generate permanent deformation, can prolong the service life of the bone conduction sounding device, and improves the tone quality of the bone conduction sounding device.

Description

Elastic sheet and bone conduction sound production device

Technical Field

The utility model relates to the technical field of bone conduction sounding, in particular to a spring plate and a bone conduction sounding device.

Background

Bone conduction sound generating mechanism is as the vocal part of bone conduction earphone, can turn into the mechanical vibration of different frequency with sound, when it contacts with the people skull, can make the people hear the sound through the mode of bone conduction, owing to need not to pass through media such as air and pass through the sound, consequently, can realize clear sound reduction in noisy environment, the sound wave can not influence other people because of diffusion in the air yet moreover, has wide application prospect.

Bone conduction sound generating mechanism includes the casing usually and locates the oscillator in the casing, and the oscillator can controlled vibration, is connected through the shell fragment usually between oscillator and the casing, and the shell fragment can reset through the elastic restoring force drive oscillator of self for the oscillator can be reciprocating motion under the drive in magnetic field.

As shown in fig. 6, fig. 6 shows a spring plate in the prior art, the spring plate includes an outer support 1, a body 2 and a connecting member 3 connected between the outer support 1 and the body 2, the outer support 1 is in a ring shape surrounding the outer portion of the body 2, the connecting member 3 has a certain radian, and two ends of the connecting member are respectively connected to the outer support 1 and the body 2. When the elastic sheet is installed on the bone conduction sounding device, the outer support of the elastic sheet is relatively fixed with the shell of the bone conduction sounding device, the body 2 is connected with the vibrator, and the vibrator can vibrate in a reciprocating mode through elastic deformation of the connecting piece 3.

Because when bone conduction sound generating mechanism used, the oscillator needed quick vibration, and the connecting piece also needed quick reciprocal deformation, the shell fragment among the prior art, its linking arm will bear great tensile stress when vibration deformation, lead to its fatigue resistance poor, take place permanent deformation easily, influence the vibration performance of shell fragment, lead to bone conduction sound generating mechanism's tone quality poor simultaneously.

Accordingly, there is a need for improvements in the art that overcome the deficiencies in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a spring plate and a bone conduction sounding device, wherein the spring plate has better fatigue resistance.

To achieve the above object, in one aspect, the present invention provides a spring plate, including:

a body;

the outer support is arranged outside the body, and a spacing space is formed between the outer support and the body; and

the connecting piece is arranged in the interval space and comprises a first arm part connected with the outer support and a second arm part connected with the body, and at least part of the first arm part and part of the second arm part are arranged oppositely.

Further, a second spacing groove is formed between the first arm part and the inner side surface of the outer support, a third spacing groove is formed between the second arm part and the outer side surface of the body, and the width of the second spacing groove and the width of the third spacing groove are 0.05mm at the minimum.

Further, the width of the second spacing groove and the width of the third spacing groove are 1-5 times of the thickness of the connecting piece.

Further, the connecting piece also comprises a first end part connected with the inner side surface of the outer support and a second end part connected with the outer side surface of the body, the width of the first end part is larger than or equal to that of the first arm part, and the width of the second end part is larger than or equal to that of the second arm part.

Further, the body is provided with a geometric center O, a first intersection line is formed at the joint of the first end and the inner side face, a second intersection line is formed at the joint of the second end and the outer side face, a first reference line is formed by the geometric center O and the midpoint of the first intersection line, a second reference line is formed by the geometric center O and the midpoint of the second intersection line, and the absolute value of an included angle between the first reference line and the second reference line is not more than 60 degrees.

Further, the outer support surrounds in the body periphery, just the medial surface of outer support with the lateral surface of body is the equidistance face.

Furthermore, the outer side surface comprises two arc-shaped first end surfaces positioned at two ends of the outer side surface and two first planes connected between the two first end surfaces, the inner side surface comprises a second end surface corresponding to the first end surface and a second plane corresponding to the first plane, the first end portion is connected with the second plane, and the second end portion is connected with the first plane.

Further, a first spacing groove with the same width is formed between the first arm portion and the second arm portion.

Further, the connecting piece further comprises a bent part between the first arm part and the second arm part, a first spacing groove is formed between the first arm part and the second arm part, and the surface of the bent part facing the first spacing groove is an arc surface.

On the other hand, the utility model also provides a bone conduction sound production device which comprises the elastic sheet.

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

the elastic sheet comprises an outer support, a body and a connecting piece connected between the body and the outer support, wherein the connecting piece comprises a first arm part and a second arm part, the first arm part and the second arm part are at least partially arranged oppositely, so that the space utilization rate of the connecting piece is higher.

Drawings

Fig. 1 is a schematic structural diagram of a spring plate according to an embodiment of the present invention.

Fig. 2 is a top view of the spring plate of fig. 1.

Fig. 3 is an enlarged view of the portion of the spring tab connector of fig. 1.

Fig. 4 is a stress distribution diagram of the elastic sheet shown in fig. 6 when the body of the elastic sheet is displaced by 0.6 mm.

Fig. 5 is a stress distribution diagram of the elastic sheet shown in fig. 1 when the body of the elastic sheet is displaced by 0.6 mm.

Fig. 6 is a top view of one embodiment of a spring in the prior art.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures. 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 application.

The terms "comprising" and "having," as well as any variations thereof, in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

As shown in fig. 1 to 3, the spring plate according to a preferred embodiment of the present invention includes an outer frame 1, a body 2, and a connecting member 3 connected between the outer frame 1 and the body 2, wherein the outer frame 1 is disposed outside the body 2, a space 4 is formed between the outer frame 1 and the body 2, and the connecting member 3 is disposed in the space 4.

The outer support 1 comprises an inner side 10 arranged towards the body 2, the body 2 comprises an outer side 20 arranged towards the outer support 1, and an interspace 4 is formed between the inner side 10 and the outer side 20. In a preferred embodiment, the outer frame 1 is in the form of a closed ring, which is disposed around the outside of the body 2. In other embodiments, the external frame 1 may have several gaps, and the length of each gap may be the same or different.

It is further preferred that the inner side 10 and the outer side 20 are equally spaced, i.e. parallel (equidistant) surfaces, so that the interspace 4 is annular with an equal width. As shown in fig. 2, in this embodiment, the outer side surface 20 includes two first end surfaces 200 located at two ends thereof and two first planes 201 connected between the two first end surfaces 200, the inner side surface 10 includes second end surfaces 100 disposed corresponding to the two first end surfaces 200 and two second planes 101 connected between the two second end surfaces 100, the first end surfaces 200 and the second end surfaces 100 are both arc surfaces and concentrically disposed, and a distance between the two first end surfaces 200 and the second end surfaces 101 is the same as a distance between the first plane 201 and the second plane 101, so that the separation space 4 is in an annular shape (racetrack shape) with equal width, preferably, diameters of the two first end surfaces 200 are the same. In other embodiments, the body 2 may be circular, the outer support 1 is in the shape of a circular ring concentrically arranged with the body 2, and correspondingly, the separation space 4 is also in the shape of a circular ring with the same width.

As shown in fig. 3, the connector 3 comprises a first end 30 connected to the inner side 10 of the outer frame 1, a second end 31 connected to the outer side 20 of the body 2, and a connecting arm connected between the first end 30 and the second end 31. The connecting arm is substantially U-shaped and comprises a first arm portion 320 connected to the first end portion 30, a second arm portion 321 connected to the second end portion 31, and a bent portion 322 connected between the first arm portion 320 and the second arm portion 321. The first arm portion 320 and the second arm portion 321 are preferably equal in width, and more preferably, the first arm portion 320 and the second arm portion 321 have the same width.

By configuring the connecting arm in a U-shape, at least part of the first arm 320 and the second arm 321 can be disposed opposite to each other, so that the space utilization rate of the connecting arm to the space 4 is higher, the total length of the connecting element 3 is longer, and thus, the connecting element 3 is easier to deform during vibration, and when the body 2 is displaced along the vibration direction, the tensile stress generated by the connecting element 3 is smaller, so that the fatigue resistance of the connecting arm is better, and permanent deformation is not easy to occur.

The number of the connecting members 3 may be plural, and preferably, it is four. In order to make the stress of the elastic sheet more symmetrical and balanced when the elastic sheet vibrates, the elastic sheet is arranged to be a symmetrical piece, as shown in fig. 2, the elastic sheet is symmetrical with a first central line 21 and a second central line 22, and the four connecting pieces 3 are correspondingly symmetrical with the first central line 21 and the second central line 22, so that when the body 2 vibrates along with the vibrator along the vibration direction, the four connecting pieces 3 can deform equally, and the stress is more balanced.

As a preferred embodiment, the first end 30 is connected to the second plane 101, the second end 31 is connected to the first plane 201, and the connecting arm extends between the first end 200 and the second end 100, and since the area between the first end 200 and the second end 100 is arc-shaped, the connecting arm can also be correspondingly arc-shaped, thereby further increasing its length. It is further preferable that the first spacing groove 40 formed between the first arm 320 and the second arm 321 is equally wide, and the second spacing groove 41 formed between the first arm 320 and the second end surface 100 and the third spacing groove 42 formed between the second arm 321 and the first end surface 200 are also equally wide, so that the connector 3 is not easily contacted with the outer holder 1 and the body 2 during the deformation process.

The widths of the first, second, and

third spacing grooves

40, 41, and 42 may be the same or different, and preferably, the widths of the second and

third spacing grooves

41 and 42 are the same.

In a preferred embodiment, the width L1 of the second spacing groove 41 and the width L2 of the third spacing groove 42 are 0.05mm at the minimum to reduce the processing difficulty.

As a preferred embodiment, a surface 3220 of the bending portion 322 facing the first spacing groove 40 is a cambered surface, and is further preferably a circular arc surface, so that a corner between the first arm portion 320 and the second arm portion 321 can be smoothly transited, stress concentration is reduced, and reliable and durable operation of the elastic sheet is facilitated.

In a preferred embodiment, the width L1 of the second spacing groove 41 and the width L2 of the third spacing groove 42 are 1 to 5 times, preferably 2 times, the thickness of the connector 3. Preferably, the thickness of the connecting member 3 is 0.2mm, and the widths of the second and

third spacing grooves

41 and 42 are 0.4 mm.

The width of the first end 30 is greater than the width of the first arm 320, the width of the second end 31 is greater than the width of the second arm 321, so that the connection between the connector 3 and the external bracket 1 and the body 2 is firmer, and preferably, the first end 30 and the first arm 320 and the second end 31 and the second arm 321 are transited through circular arcs, so that the transition is smoother and the stress concentration is reduced. As a preferred embodiment, the absolute value of the included angle between the first reference line 5 and the second reference line 50 is not greater than 60 °, further preferred, the absolute value of the included angle is less than 30 °, further preferred, the absolute value of the included angle is less than 5 °, further preferred, the absolute value of the included angle is less than 2 °, further preferred, the absolute value of the included angle is 1.5 °.

Further, the second end 31 is closer to the first centerline 21 than the first end 30.

The connecting pieces 3 may be of equal thickness or unequal thickness, preferably, the connecting pieces 3 are of equal thickness, and the thickness of the connecting pieces 3 is preferably any value between 0.05mm and 0.5 mm. In particular, the wall thickness may be 0.05mm, 0.1mm, 0.12mm, 0.15mm, 0.2mm, 0.25mm or 0.3mm, 0.35mm, 0.4mm or 0.5 mm. Similarly, the outer bracket 1 and the body 2 may be of equal thickness or different thicknesses, and as a preferred embodiment, the outer bracket 1 and the body 2 are of equal thickness and the same thickness as the connecting piece 3, so that the spring plate is of an equal thickness sheet shape as a whole. In other embodiments, the external frame 1, the body 2, the connecting member 3, etc. may have a certain curvature and undulation.

The elastic sheet can be made of metal materials or other single or composite materials with the same or similar performance, and the Young modulus of the elastic sheet is any value between 120Gpa and 300 Gpa. Specifically, the young's modulus may be 120Gpa, 140Gpa, 160Gpa, 180Gpa, 190Gpa, 200Gpa, 220Gpa, 240Gpa, 260Gpa, 280Gpa, or 300 Gpa. When the Young modulus of the material is between 120Gpa and 300Gpa, the resonance frequency point F0 of the elastic sheet can be effectively reduced, and an excellent low-frequency effect is achieved.

It will be understood that the outer frame 1 and the body 2 do not have to be a complete sheet, but that the surfaces thereof may also be provided with through holes or grooves, for example, positioning grooves are provided on the inner side 10 of the outer frame 1 and/or the outer side 20 of the body 2.

Referring to fig. 4 and 5, fig. 4 shows a simulated stress distribution diagram of an elastic sheet of one embodiment in the prior art when the body 2 of the elastic sheet deviates from the original position by 0.6mm, figure 5 shows a simulated stress distribution diagram of the shrapnel of one embodiment of the utility model when the body 2 of the shrapnel deviates from the original position by 0.6mm, the outer support 1 and the body 2 of the spring plate in fig. 4 and 5 have basically the same structure and size, only the structure of the connecting piece 3 is different, according to the simulation results, the prior art connector 3 shown in fig. 4 is subjected to a maximum tensile stress of 2160Mpa, the connector 3 of the present invention shown in fig. 5 is subjected to a maximum tensile stress of 1375Mpa, which is significantly lower than the tensile stress of 2160Mpa of the connector 3 of the prior art, and therefore, compared to the prior art spring plate, the spring plate of the present invention is subjected to much less tensile stress when the body 2 is displaced the same. The elastic sheet has better fatigue resistance and is not easy to generate permanent deformation.

The utility model also provides a bone conduction sounding device which comprises the elastic sheet.

The above is only one embodiment of the present invention, and any other modifications based on the concept of the present invention are considered as the protection scope of the present invention.

Claims

1. An elastic sheet, comprising:

a body (2);

the outer support (1) is arranged on the outer side of the body (2), and a spacing space (4) is formed between the outer support (1) and the body (2); and

the connecting piece (3) is arranged in the spacing space (4), the connecting piece (3) comprises a first arm portion (320) connected with the outer support (1) and a second arm portion (321) connected with the body (2), and at least parts of the first arm portion (320) and the second arm portion (321) are arranged oppositely.

2. An elastic sheet according to claim 1, characterized in that a second spacing groove (41) is formed between said first arm (320) and the inner side (10) of said outer support (1), a third spacing groove (42) is formed between said second arm (321) and the outer side (20) of said body (2), and the width of said second spacing groove (41) and said third spacing groove (42) is at least 0.05 mm.

3. An elastic sheet according to claim 2, wherein the width of the second and third spacing grooves (41, 42) is 1 to 5 times the thickness of the connecting member (3).

4. A spring plate according to any one of claims 1 to 3, characterized in that the connecting piece (3) further comprises a first end portion (30) connected to the inner side (10) of the outer support (1) and a second end portion (31) connected to the outer side (20) of the body (2), the first end portion (30) having a width greater than or equal to the width of the first arm portion (320), the second end portion (31) having a width greater than or equal to the width of the second arm portion (321).

5. An elastic sheet according to claim 4, wherein the body (2) has a geometric centre O, the junction of the first end portion (30) and the inner side surface (10) forms a first line of intersection, the junction of the second end portion (31) and the outer side surface (20) forms a second line of intersection, the geometric centre O and a midpoint of the first line of intersection form a first reference line (5), the geometric centre O and a midpoint of the second line of intersection form a second reference line (50), and the absolute value of the angle between the first reference line (5) and the second reference line (50) is not more than 60 °.

6. A spring plate according to claim 4, characterized in that the outer support (1) surrounds the outer circumference of the body (2), and the inner side (10) of the outer support (1) and the outer side (20) of the body (2) are equidistant surfaces.

7. An elastic sheet according to claim 6, wherein the outer side surface (20) comprises two circular arc-shaped first end surfaces (200) at both ends thereof and two first flat surfaces (201) connected between the two first end surfaces (200), the inner side surface (10) comprises a second end surface (100) corresponding to the first end surface (200) and a second flat surface (101) corresponding to the first flat surface (201), the first end portion (30) is connected to the second flat surface (101), and the second end portion (31) is connected to the first flat surface (201).

8. A ballistic plate according to any one of claims 1 to 3, characterized in that a first spacing groove (40) of equal width is formed between the first arm portion (320) and the second arm portion (321).

9. An elastic sheet according to any one of claims 1 to 3, wherein said connecting member (3) further comprises a bent portion (322) between said first arm portion (320) and said second arm portion (321), a first spacing groove (40) being formed between said first arm portion (320) and said second arm portion (321), a surface of said bent portion (322) facing said first spacing groove (40) being an arc surface.

10. A bone conduction sound emitting device comprising the elastic sheet according to any one of claims 1 to 9.