CN106714054A - Piezoelectric loudspeaker - Google Patents

Abstract

The invention relates to a piezoelectric type loudspeaker, which is used for solving the problem that the whole volume of the piezoelectric type loudspeaker is increased in order to improve the loudspeaker quality of the piezoelectric type loudspeaker in the prior art. It comprises a shell, the shell is provided with a first edge and a second edge; the loudspeaker body is arranged in the shell and comprises at least one ceramic resonance sheet, at least one metal sheet and a basin body, wherein the ceramic resonance sheet is overlapped with the metal sheet, and the outer side of the bottom of the basin body is in contact with the metal sheet; and the length of the ceramic resonance sheet is not less than 90% of the length of the second edge, the length of the metal sheet is greater than the length of the second edge, and the part of the metal sheet beyond the second edge is subjected to material removal. Therefore, when the volume of the piezoelectric type loudspeaker is improved, the whole volume of the piezoelectric type loudspeaker is not increased.

Description

piezoelectric speaker

technical field

The invention relates to a piezoelectric loudspeaker, in particular to a piezoelectric loudspeaker capable of improving sound quality without increasing volume.

Background technique

FIG. 1 is a schematic plan view of a conventional piezoelectric speaker. Existing piezoelectric speaker (Piezoelectric Tweeter) 11 comprises a casing 12, and its inner side has a first side 17 and a second side 16, and first side 17 is larger than second side 16; , set in the housing 12; a plurality of metal discs (Metal Disc) 14, set on the outside of the bottom of the basin; and a plurality of ceramic resonant plates (Ceramic Resonator) 13, set on the surface of the metal disc 14 relative to the basin Above, the diameter of the ceramic resonant piece 13 is smaller than the diameter of the metal piece 14, the diameter of the metal piece 14 is less than or equal to the width 16 of the shell 12, the diameter of the pot is less than or equal to the width 16 of the shell 12, and the two metal pieces 14 are not overlap each other, and the two basins do not overlap.

The sound quality, resonance frequency (Resonant Frequency, F0) and sound pressure level (Sound Pressure Level, SPL) related. The resonance frequency of the piezoelectric speaker 11 is related to the diameter of the ceramic resonant plate 13 .

In the prior art, in order to lower the resonant frequency, the diameter of the ceramic resonant piece 13 must be increased, which in turn increases the width 16 of the casing, and the overall volume of the piezoelectric speaker 11 is thus increased. The sound pressure level of the piezoelectric speaker 11 is related to the area of the basin. In the prior art, in order to increase the sound pressure level, the area of the basin must be increased, which in turn increases the width 16 of the casing, and the overall volume of the piezoelectric speaker 11 is thus increased.

Therefore, in the existing piezoelectric speaker, there is a problem that in order to improve the sound quality of the piezoelectric speaker 11 , the overall volume of the piezoelectric speaker 11 is also increased. In view of this, the present invention proposes the following ideas.

Contents of the invention

The purpose of the present invention is to improve the sound quality of the piezoelectric speaker, and the overall volume of the piezoelectric speaker will increase accordingly.

The invention provides a piezoelectric speaker, which includes: a housing and at least one speaker body. The casing has a first side and a second side. The loudspeaker main body is arranged in the casing, and the loudspeaker main body includes at least one ceramic resonant piece, at least one metal piece and a basin body. The ceramic resonant sheet and the metal sheet are arranged overlappingly, and the outer bottom of the pot body is arranged in contact with the metal sheet. The length of the ceramic resonant piece is not less than 90% of the length of the second side, the length of the metal piece is longer than the second side, and the part of the metal piece beyond the second side is removed.

In an exemplary embodiment of the piezoelectric speaker, the ceramic resonant piece and the metal piece are in the shape of a disc, and the length of the ceramic resonant piece and the metal piece is the diameter of the circle.

In an exemplary embodiment of the piezoelectric speaker, the basin body is a plastic film.

In an exemplary embodiment of the piezoelectric speaker, when the housing is provided with more than two groups of speaker bodies, the speaker bodies are arranged in sequence, and there is a gap between each speaker body.

In an exemplary embodiment of the piezoelectric speaker, when the main body of the speaker has two sets of ceramic resonant plates and two sets of metal plates, the structure of the basin body will present an oblong shape, and the outer bottom of the basin body will be in contact with the Some sheet metal contacts are set.

In an exemplary embodiment of the piezoelectric speaker, when the pot body of the speaker body is oblong, the ceramic resonant sheet and the metal sheet are arranged on the outside of the bottom of the pot body and in the middle.

In order to make the purpose, features and advantages of the present invention easier for those skilled in the art to understand, preferred embodiments will be described in detail below together with the accompanying drawings.

Description of drawings

FIG. 1 is a schematic plan view of a conventional piezoelectric speaker.

Fig. 2 shows a first angle perspective view of the first embodiment of the present invention.

Figure 3 shows a second perspective view of the first embodiment of the present invention.

Fig. 4 shows a schematic plan view of a first embodiment of the present invention.

Fig. 5 shows a perspective view from a first angle of a second embodiment of the present invention.

Fig. 6 shows a sectional view of line A-A of the second embodiment of the present invention.

Fig. 7 shows a second angle perspective view of the third embodiment of the present invention.

Fig. 8 shows a sectional view of line A-A of the third embodiment of the present invention.

Mark Description:

11, 1, 1a, 1b piezoelectric speaker

12, 2, 2a, 2b shell

13, 3, 3a, 3b ceramic resonator

14, 4, 4a, 4b sheet metal

5, 5a, 5b speaker body

16, 6, 6a, 6b second side

17, 7, 7a, 7b First side

8, 8a, 8b Basin.

detailed description

Please refer to Fig. 2 and Fig. 3, which are respectively the perspective view of the first angle and the perspective view of the second angle of the first embodiment of the present invention. It can be clearly seen from the figure that the piezoelectric speaker 1 includes a housing 2, two speaker Acoustic main body 5 (in other embodiments can only comprise one loudspeaker main body), adopts the mode of side by side to arrange left and right, and keeps a gap between each loudspeaker main body 5, and loudspeaker main body 5 has included ceramic resonant piece 3, metal The sheet 4 and the pot body 8, the two sides of the housing 2 have the second side 6 and the first side 7, viewed from the angle in Figure 2, there is nothing special on the whole, but viewed from the angle in Figure 3, then It can be clearly seen that the ceramic resonant piece 3 is in the shape of a disc, and is very close to the second side 6. Specifically, the length (diameter) of the ceramic resonant piece 3 is not less than 90% of the length of the second side, while the metal The sheet 4 is approximately circular. Because the length (diameter) of the metal sheet 4 is greater than that of the second side 6, the excess part is removed so that the whole can be placed in the housing 2.

Please refer to Fig. 4. Fig. 4 is a schematic plan view of the first embodiment of the present invention. From the figure, the relationship between the ceramic resonant sheet 3, the metal sheet 4 and the second side 6 can be clearly seen, because the loudspeaker of the piezoelectric speaker 1 The quality is related to the resonant frequency and the sound pressure level, wherein the resonant frequency of the piezoelectric speaker 1 is related to the diameter of the ceramic resonant piece 3, preferably, in order to reduce the resonant frequency in this embodiment, the diameter of the ceramic resonant piece 3 is increased, and The part of the metal sheet 4 that exceeds the second side 6 is cut off, so that the second side 6 of the casing does not increase, that is, the overall volume of the piezoelectric speaker 1 does not increase accordingly.

Please refer to Fig. 5, Fig. 5 is the perspective view of the first angle of the second embodiment of the present invention, it can be clearly seen from the figure, similarly, the piezoelectric speaker 1a includes a housing 2a and a loudspeaker main body 5a, different In the place of the previous embodiment, the speaker body 5a has two sets of ceramic resonance plates and two sets of metal plates, and the structure of the basin body 8a will present an oblong shape, and the outer bottom of the basin body 8a will be in contact with the metal plates at the same time. The two sides of the housing 2a have the second side 6a and the first side 7a. Viewed from the side with the basin 8a, the housing 2a has nothing special on the whole. The difference is that the basin 8a becomes oblong, and the Viewed from one side with the ceramic resonant piece and the metal piece, the sounding structures composed of a ceramic resonating piece and a metal piece are respectively arranged on the left and right sides. Similarly, in order to avoid mutual interference, each group of sounding structures is kept at a certain distance.

Please refer to Fig. 6, Fig. 6 is the sectional view of the A-A line segment of the second embodiment of the present invention, similarly, it can be clearly seen from the figure that the ceramic resonant sheet 3a, the metal sheet 4a and the pot body can be further understood by the A-A line segment sectional view The structure of the loudspeaker main body 5a formed by 8a, the basin 8a is oblong, and the sounding structure composed of a ceramic resonant piece 3a and a metal sheet 4a is respectively combined in the semicircle of the left and right sides of the basin 8a, so that the sound Sometimes there is a better effect, and the rest is the same as the previous embodiment, so it will not be repeated here.

Please refer to Fig. 7, Fig. 7 is the perspective view of the second angle of the third embodiment of the present invention, can be clearly seen from the figure, similarly, the piezoelectric speaker 1b includes a shell 2b and a loudspeaker main body, different from In the place of the previous embodiment, the main body of the loudspeaker is changed to a set of ceramic resonant pieces 3b and metal pieces 4b, while the structure of the basin remains in an oblong shape, and the outer center of the bottom of the basin is in contact with the metal piece 4b. The two sides of the body 2b have the second side 6b and the first side 7b. Viewed from the side with the basin body, the housing 2b has no special features as a whole. Viewing from one side of 3b and the metal sheet 4b, the ceramic resonant sheet 3b and the metal sheet 4b are arranged at the center outside the bottom of the pot body.

Please refer to Fig. 8, Fig. 8 is the A-A line section sectional view of the third embodiment of the present invention, similarly, it can be clearly seen from the figure that the ceramic resonant sheet 3b, the metal sheet 4b and the pot body can be further understood by the A-A line section section 8b structure of the speaker main body 5b, the basin 8b is oblong, and the sounding structure formed by the ceramic resonator 3b and the metal sheet 4b are respectively combined in the center of the outside of the bottom of the basin 8b, so that there is more sound when sounding. Good and balanced effect, and the rest is the same as the previous embodiment, so it will not be repeated here.

It should be understood that although this specification is described according to various embodiments, the technical solutions among them can be used in conjunction with each other. It can be clearly understood that the structure of the speaker body 5 can be changed, mainly to match the design of the housing 2. change, but mainly lies in the relationship between the ceramic resonant plate 3 and the second side 6, when the length of the ceramic resonant plate 3 is not less than 90% of the length of the second side 6, the sound quality of the piezoelectric speaker 1 is improved, and The overall volume of the piezoelectric speaker 1 will not become larger, and the purpose of improvement can be achieved.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore The scope of protection of the present invention should be defined by the claims.

Claims (6)

1. A piezoelectric speaker, comprising: a shell, the shell has a first side and a second side; At least one loudspeaker main body is arranged in the casing, the loudspeaker main body includes at least one ceramic resonant piece, at least one metal piece and a pot body, the ceramic resonant piece overlaps with the metal piece, and the outer bottom of the pot body is arranged in contact with the sheet metal; and Wherein the length of the ceramic resonant piece is not less than 90% of the length of the second side, the length of the metal piece is longer than the second side, and the part of the metal piece beyond the second side is removed. 2. The piezoelectric speaker as claimed in claim 1, wherein the ceramic resonant piece and the metal piece are in the shape of a disc, and the length of the ceramic resonant piece and the metal piece is the diameter of the circle. 3. The piezoelectric speaker as claimed in claim 1, wherein the tub is a plastic film. 4. The piezoelectric speaker according to claim 1, wherein when the housing is provided with two or more sets of speaker bodies, the speaker bodies are arranged in sequence, and there is a gap between each of the speaker bodies. gap. 5. The piezoelectric speaker as claimed in claim 1, wherein when the speaker main body has two sets of ceramic resonant plates and two sets of metal plates, the structure of the basin body presents an oblong shape, so that the outside of the bottom of the basin body At the same time, it is set in contact with the metal sheet. 6 . The piezoelectric speaker as claimed in claim 1 , wherein when the pot body of the speaker body is oblong, the ceramic resonant plate and the metal plate are arranged in the middle outside the bottom of the pot body. 7 .