CN216357216U - Elastic sheet and bone conduction sound production device - Google Patents

Abstract

The utility model discloses a shrapnel and a bone conduction sounding device. The shrapnel comprises: a main body (2); A space (4) is formed between (2); and a connecting piece (3) is arranged in the space (4), and the connecting piece (3) includes a first connecting piece (3) connected to the outer bracket (1). An arm portion (320) and a second arm portion (321) connected to the body (2), the first arm portion (320) and the second arm portion (321) are at least partially opposite to each other. The shrapnel of the utility model has better fatigue resistance, is less prone to permanent deformation, can increase the service life of the bone conduction sounding device, and improve the sound quality of the bone conduction sounding device.

Description

Shrapnel and bone conduction sounding device

technical field

The utility model relates to the technical field of bone conduction sound generation, in particular to a shrapnel and a bone conduction sound generation device.

Background technique

As the sounding part of the bone conduction earphone, the bone conduction sound device can convert the sound into mechanical vibrations of different frequencies. When it is in contact with the human skull, it can make the human hear the sound through bone conduction. Therefore, it can achieve clear sound restoration in a noisy environment, and the sound waves will not affect others because of the diffusion in the air, which has broad application prospects.

The bone conduction sounding device usually includes a casing and a vibrator arranged in the casing. The vibrator can vibrate in a controlled manner. The vibrator and the casing are usually connected by a shrapnel. reciprocating motion under the drive.

As shown in FIG. 6 , FIG. 6 shows an elastic sheet in the prior art, the elastic sheet includes an outer bracket 1 , a main body 2 and a connecting piece 3 connected between the outer bracket 1 and the main body 2 , and the outer bracket 1 is surrounded by The outer part of the main body 2 is annular, and the connecting piece 3 has a certain arc, and its two ends are respectively connected to the outer bracket 1 and the main body 2 . When the shrapnel is installed on the bone conduction sound device, its outer bracket is relatively fixed to the shell of the bone conduction sound device, the body 2 is connected to the vibrator, and the vibrator can vibrate back and forth through the elastic deformation of the connector 3 .

Since the vibrator needs to vibrate rapidly when the bone conduction sounding device is used, the connecting piece also needs to be rapidly reciprocating deformation. The connecting arm of the shrapnel in the prior art will bear a large tensile stress during vibration and deformation, resulting in its resistance to fatigue. It has poor performance and is prone to permanent deformation, affecting the vibration performance of the shrapnel, and at the same time resulting in poor sound quality of the bone conduction sound device.

Therefore, it is necessary to improve the prior art to overcome the stated drawbacks in the prior art.

Utility model content

The purpose of the utility model is to provide a shrapnel and a bone conduction sounding device, and the shrapnel has better fatigue resistance.

In order to achieve the purpose of the above utility model, on the one hand, the utility model proposes a kind of shrapnel, comprising:

ontology;

an outer support, arranged on the outside of the body, and a space is formed between the outer support and the body; and

a connecting piece, arranged in the interval, the connecting piece comprises a first arm part connected with the outer bracket and a second arm part connected with the main body, the first arm part and the second arm part The arms are at least partially opposite.

Further, a second spacing groove is formed between the first arm portion and the inner side surface of the outer bracket, a third spacing groove is formed between the second arm portion and the outer side surface of the body, and the second spacing groove is formed between the second arm portion and the outer side surface of the main body. The width of the spacing groove and the third spacing groove is at least 0.05 mm.

Further, the widths of the second spacing groove and the third spacing groove are 1 to 5 times the thickness of the connector.

Further, the connecting piece further includes a first end connected with the inner side of the outer bracket and a second end connected with the outer side of the body, and the width of the first end is greater than or equal to the width of the The width of the first arm portion and the width of the second end portion are greater than or equal to the width of the second arm portion.

Further, the body has a geometric center O, the connection between the first end and the inner side forms a first boundary line, and the connection between the second end and the outer side forms a second boundary line , the geometric center O and the midpoint of the first boundary line form a first reference line, the geometric center O and the midpoint of the second boundary line form a second reference line, the first reference line and the The absolute value of the included angle between the second reference lines is not greater than 60°.

Further, the outer bracket surrounds the outer periphery of the main body, and the inner side surface of the outer bracket and the outer side surface of the main body are equidistant surfaces.

Further, the outer side surface includes two arc-shaped first end surfaces located at both ends thereof and two first planes connected between the two first end surfaces, and the inner side surface includes and the first end surface. A second end face corresponding to the end face 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 interval groove of equal width is formed between the first arm portion and the second arm portion.

Further, the connector further includes a bent portion between the first arm portion and the second arm portion, and a first interval groove is formed between the first arm portion and the second arm portion, A surface of the bent portion facing the first interval groove is an arc surface.

On the other hand, the present invention also provides a bone conduction sounding device, which includes the shrapnel described in any one of the above.

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

The elastic sheet of the present invention includes an outer bracket, a body and a connecting piece connected between the body and the outer bracket, the connecting piece includes a first arm portion and a second arm portion, and the first arm portion and the second arm portion are arranged to at least The form of partial relative arrangement makes the space utilization rate of the connecting piece higher. Compared with the elastic piece in the prior art, when occupying roughly the same area in the interval space, the length of the connecting piece of the elastic piece in the present invention is longer. When the body vibrates, elastic deformation is more likely to occur, the tensile stress is smaller, the fatigue resistance is better, and permanent deformation is not easy to occur, thereby increasing the service life of the bone conduction sound device and improving the sound quality of the bone conduction sound device.

Description of drawings

FIG. 1 is a schematic structural diagram of an elastic sheet according to an embodiment of the present invention.

FIG. 2 is a top view of the elastic piece in FIG. 1 .

FIG. 3 is an enlarged view of the elastic piece connecting piece in FIG. 1 .

FIG. 4 is a stress distribution diagram of the elastic piece shown in FIG. 6 when its body is displaced by 0.6 mm.

FIG. 5 is a stress distribution diagram of the elastic piece shown in FIG. 1 when its body is displaced by 0.6 mm.

FIG. 6 is a top view of an elastic sheet according to an embodiment of the prior art.

Detailed ways

In order to make the above objects, features and advantages of the present application more clearly understood, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, the drawings only show some but not all the structures related to the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

The terms "comprising" and "having" and any variations thereof in this application are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally also includes For other steps or units inherent to these processes, methods, products or devices.

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 present application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor a separate or alternative embodiment that is mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

As shown in Fig. 1 to Fig. 3 , corresponding to an elastic sheet according to a preferred embodiment of the present invention, it includes an outer bracket 1, a main body 2 and a connecting piece 3 connected between the outer bracket 1 and the main body 2. The outer bracket 1 is provided with Outside the main body 2 , a space 4 is formed therebetween, and the connector 3 is located in the space 4 .

The outer bracket 1 includes an inner side 10 facing the body 2 , the body 2 includes an outer side 20 facing the outer bracket 1 , and an interval 4 is formed between the inner side 10 and the outer side 20 . As a preferred embodiment, in this embodiment, the outer bracket 1 is in the form of a closed ring, and is arranged around the outside of the main body 2 . In other embodiments, the outer support 1 may also have several notches, and the lengths of the individual notches may be the same or different.

Further preferably, the distance between the inner side surface 10 and the outer side surface 20 is equal, that is, the two are parallel planes (equidistant planes), so that the interval space 4 is annular with equal width. As shown in FIG. 2 , in this embodiment, the outer side surface 20 includes two first end surfaces 200 at both ends thereof and two first planes 201 connected between the two first end surfaces 200 , and the inner side surface 10 includes two The second end faces 100 corresponding to the first end faces 200 and the two second planes 101 connected between the two second end faces 100 , the first end faces 200 and the second end faces 100 are arc surfaces, and both are concentric Set, the distance between the two is the same as the distance between the first plane 201 and the second plane 101, so that the space 4 is annular (racetrack shape) of equal width, preferably, the diameter of the two first end faces 200 same. In other embodiments, the main body 2 may be circular, the outer support 1 is in the shape of a circular ring concentrically disposed with the main body 2 , and correspondingly, the interval space 4 is also in the circular ring shape with the same width.

As shown in FIG. 3 , the connector 3 includes a first end 30 connected to the inner side 10 of the outer bracket 1 , a second end 31 connected to the outer side 20 of the main body 2 , and a first end 30 and a second end 31 connected to the outer side 20 of the main body 2 . A connecting arm between the two ends 31 . The connecting arm is substantially U-shaped, and includes 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 connected to the first arm portion 320 and the second arm portion 321 Bend 322 between. Both the first arm portion 320 and the second arm portion 321 are preferably of equal width, and further preferably, the width of the first arm portion 320 and the second arm portion 321 are the same.

By arranging the connecting arm in a U-shape, the first arm portion 320 and the second arm portion 321 can be at least partially opposite to each other, so that the space utilization rate of the interval space 4 is higher, and the total length of the connecting piece 3 is longer. , in this way, the deformation of the connector 3 is easier during vibration, and when the body 2 is displaced along the vibration direction, the tensile stress generated by the connector 3 is smaller, so that its fatigue resistance is better, and permanent deformation is not easy to occur. .

The number of the connecting pieces 3 can be multiple, and preferably, the number is four. In order to make the force of the elastic sheet more symmetrical and balanced when it vibrates, the elastic sheet is set as a symmetrical piece, as shown in FIG. The first center line 21 and the second center line 22 are symmetrical, so that when the body 2 vibrates along the vibrator along the vibration direction, the four connecting pieces 3 can be deformed the same, and the force 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 , since the area between the first end face 200 and the second end face 100 is in an arc shape, the connecting arm can also be set in an arc shape accordingly, so as to further increase its length. Further preferably, the first interval grooves 40 formed between the first arm portion 320 and the second arm portion 321 are of equal width, and at the same time, the second interval formed between the first arm portion 320 and the second end surface 100 The grooves 41 and the third spacing grooves 42 formed between the second arm portion 321 and the first end surface 200 are also of equal width, so that the connecting member 3 is not easily contacted with the outer bracket 1 and the body 2 during the deformation process.

The widths of the first spacing groove 40 , the second spacing groove 41 and the third spacing groove 42 may be the same or different. Preferably, the widths of the second spacing groove 41 and the third spacing groove 42 are the same.

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

As a preferred embodiment, the surface 3220 of the bending portion 322 facing the first interval groove 40 is an arc surface, more preferably an arc surface, so that the corner between the first arm portion 320 and the second arm portion 321 can be The smooth transition reduces stress concentration, which is more conducive to the reliable and lasting work of the shrapnel.

As 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 the thickness of the connecting member 3 , preferably 2 times. Preferably, the thickness of the connecting member 3 is 0.2 mm, and the widths of the second spacing groove 41 and the third spacing groove 42 are both 0.4 mm.

The width of the first end portion 30 is greater than the width of the first arm portion 320, and the width of the second end portion 31 is greater than the width of the second arm portion 321, so that the connection between the connecting member 3 and the outer bracket 1 and the body 2 is better. Firmly and preferably, arc transitions are used between the first end portion 30 and the first arm portion 320 and between the second end portion 31 and the second arm portion 321 to make the transition smoother and reduce stress concentration. The connection between the first end portion 31 and the inner side surface 10 forms a first boundary line, the first boundary line has a first midpoint A, and the connection between the second end portion 21 and the outer side surface 20 forms a second boundary line, and the second boundary line There is a second midpoint B, a first reference line 5 is formed between the geometric center O of the body 2 and the first midpoint A, and a second reference line 50 is formed between the geometric center O and the second center point B, as a In 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 preferably, the absolute value of the included angle is less than 30 degrees, further preferably, the absolute value of the included angle is less than 5 degrees, still further preferably, the absolute value of the included angle is less than 2 degrees, and even more preferably, the absolute value of the included angle is 1.5°.

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

The connecting piece 3 can be of equal thickness or unequal thickness, preferably, the connecting piece 3 is of equal thickness, and the thickness of the connecting piece 3 is preferably any value between 0.05mm and 0.5mm. Specifically, 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 0.5mm. Similarly, the outer bracket 1 and the main body 2 can also be of equal thickness or unequal thickness. As a preferred embodiment, the outer bracket 1 and the main body 2 are both of equal thickness, and have the same thickness as the connector 3 . In this way, the shrapnel is in the shape of a sheet of equal thickness as a whole. In other embodiments, the outer bracket 1 , the body 2 or the connecting member 3 etc. may also have certain bending and undulation.

The material of the shrapnel can be a metal material, or other single or composite materials that can achieve the same or similar properties, and the Young's modulus of the shrapnel is any value between 120Gpa and 300Gpa. Specifically, the Young's modulus may be 120Gpa, 140Gpa, 160Gpa, 180Gpa, 190Gpa, 200Gpa, 220Gpa, 240Gpa, 260Gpa, 280Gpa or 300Gpa. When the Young's modulus of the material is between 120Gpa and 300Gpa, the resonant frequency point F0 of the shrapnel can be effectively reduced to achieve an excellent low frequency effect.

It can be understood that the outer support 1 and the body 2 are not necessarily complete sheets, and through holes or grooves can also be opened on the surface thereof, for example, a positioning groove is opened on the inner side 10 of the outer support 1 and/or the outer side 20 of the body 2. .

Referring to FIG. 4 and FIG. 5 , FIG. 4 shows a simulated stress distribution diagram of an elastic sheet in an embodiment of the prior art when its body 2 deviates from its original position by 0.6 mm, and FIG. 5 shows an implementation of the present utility model. The simulated stress distribution diagram of the shrapnel in this way when its body 2 deviates from its original position by 0.6mm. The structures and dimensions of the outer bracket 1 and the body 2 of the shrapnel in Figures 4 and 5 are basically the same, and only the structure of the connector 3 is different. According to the simulation As a result, the maximum tensile stress of the connector 3 in the prior art shown in FIG. 4 is 2160Mpa, and the maximum tensile stress of the connector 3 in the present invention shown in FIG. 5 is 1375Mpa, which is significantly lower than The tensile stress of the connector 3 in the prior art is 2160Mpa. Therefore, compared with the elastic sheet in the prior art, when the body 2 undergoes the same displacement, the elastic sheet in the present invention is subjected to a much smaller tensile stress. . The shrapnel of the utility model has better fatigue resistance and is less prone to permanent deformation.

The utility model also provides a bone conduction sounding device, the bone conduction sounding device includes the shrapnel described above.

The elastic sheet of the present invention includes an outer bracket, a body and a connecting piece connected between the body and the outer bracket, the connecting piece includes a first arm portion and a second arm portion, and the first arm portion and the second arm portion are arranged to at least The form of partial relative arrangement makes the space utilization rate of the connecting piece higher. Compared with the elastic piece in the prior art, when occupying roughly the same area in the interval space, the length of the connecting piece of the elastic piece in the present invention is longer. When the body vibrates, elastic deformation is more likely to occur, the tensile stress is smaller, the fatigue resistance is better, and permanent deformation is not easy to occur, thereby increasing the service life of the bone conduction sound device and improving the sound quality of the bone conduction sound device.

The above is only a specific embodiment of the present invention, and any improvements made on the basis of the concept of the present invention are regarded as the protection scope of the present invention.

Claims (10)

1. a shrapnel, is characterized in that, comprises: ontology (2); an outer support (1), arranged on the outside of the main body (2), a space (4) is formed between the outer support (1) and the main body (2); and A connecting piece (3) is provided in the interval space (4), the connecting piece (3) comprises a first arm portion (320) connected with the outer bracket (1) and a first arm portion (320) connected with the main body (2) For the connected second arm parts (321), the first arm part (320) and the second arm part (321) are at least partially opposite to each other. 2. The elastic sheet according to claim 1, wherein a second interval groove (41) is formed between the first arm portion (320) and the inner side surface (10) of the outer bracket (1), so A third spacing groove (42) is formed between the second arm portion (321) and the outer side surface (20) of the body (2), the second spacing groove (41) and the third spacing groove (42) ) with a minimum width of 0.05mm. 3 . The elastic sheet according to claim 2 , wherein the width of the second spacing groove ( 41 ) and the third spacing groove ( 42 ) is 1 to 5 times the thickness of the connecting piece ( 3 ). 4 . . 4. The elastic sheet according to any one of claims 1 to 3, characterized in that, the connecting member (3) further comprises a first end ( 30) and a second end portion (31) connected to the outer side surface (20) of the body (2), the width of the first end portion (30) being greater than or equal to the width of the first arm portion (320) , the width of the second end portion (31) is greater than or equal to the width of the second arm portion (321). 5. The elastic sheet according to claim 4, characterized in that, the body (2) has a geometric center O, and the connection between the first end (30) and the inner side surface (10) forms a first junction line, the connection between the second end (31) and the outer side surface (20) forms a second boundary line, and the geometric center O and the midpoint of the first boundary line form a first reference line (5 ), the geometric center O and the midpoint of the second boundary line form a second reference line (50), the angle between the first reference line (5) and the second reference line (50) The absolute value is not greater than 60°. 6. The elastic sheet according to claim 4, characterized in that the outer bracket (1) surrounds the outer periphery of the body (2), and the inner side surface (10) of the outer bracket (1) and the body The outer side surface (20) of (2) is an equidistant surface. 7. The elastic sheet according to claim 6, characterized in that, the outer side surface (20) comprises two arcuate first end surfaces (200) located at both ends thereof and connected to the two first end surfaces (200). 200) between two first planes (201), the inner side surface (10) includes a second end surface (100) corresponding to the first end surface (200) and a second end surface (100) corresponding to the first plane (201) the second plane (101), the first end (30) is connected with the second plane (101), and the second end (31) is connected with the first plane (201). 8. The elastic sheet according to any one of claims 1 to 3, wherein a first interval groove (320) of equal width is formed between the first arm portion (320) and the second arm portion (321). 40). 9. The elastic sheet according to any one of claims 1 to 3, characterized in that, the connecting member (3) further comprises a space between the first arm portion (320) and the second arm portion (321) The bent portion (322) of the first arm portion (320) and the second arm portion (321) form a first interval groove (40), and the bent portion (322) faces the first spacer (322). The surface of an interval groove (40) is arcuate. 10 . A bone conduction sounding device, characterized in that, it comprises the shrapnel according to any one of claims 1 to 9 . 11 .

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