CN113630697B

CN113630697B - Signaling device for automobile instrument and its making method

Info

Publication number: CN113630697B
Application number: CN202110671516.9A
Authority: CN
Inventors: 王平; 张峰磊; 鲍晨凯; 李红元; 吴逸飞
Original assignee: Bestar Holding Co ltd
Current assignee: Bestar Holding Co ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2023-05-12
Anticipated expiration: 2041-06-17
Also published as: CN113630697A

Abstract

The invention relates to the technical field of sounding devices, in particular to a signaling device for an automobile instrument and a manufacturing method thereof, comprising the following steps: the basin stand is provided with a step cavity along the thickness direction of the basin stand; the magnetic cover and the basin frame are integrally injection molded; the magnet is fixed at the bottom of the magnetic cover and is used for providing a magnetic field; a printed coil including a fixed base material in a tubular shape and a wiring printed on the fixed base material at a low temperature; a main coil wound on the printed coil; the sound film is fixedly connected with one end of the main coil, and the edge of the sound film is fixed at the edge of the basin frame; the welding sheet is fixed on the bottom surface of the basin frame and used for connecting the main coil and the printing coil; wherein, the internal diameter of the printing coil is greater than the external diameter of the magnet, and when the printing coil and the main coil are electrified, the main coil and the printing coil drive the sound film to vibrate. According to the invention, the printed coil manufactured by low-temperature printing is added in the main coil, so that the number of turns of the coil is further increased in a limited space, and the sound pressure of the sounder under the same volume is improved.

Description

Signaling device for automobile instrument and its making method

Technical Field

The invention relates to the technical field of sound production devices, in particular to a signaling device for an automobile instrument and a manufacturing method thereof.

Background

The alarm device is used for alarming an instrument, and the working principle of the alarm device is similar to that of a moving coil loudspeaker, and the alarm device comprises a magnet, a coil and a vibrating diaphragm, wherein a variable current passes through the coil to generate a variable magnetic field, and the vibrating diaphragm vibrates under the action of the magnetic field of the magnet so as to generate sound; as automobile instruments become more and more miniaturized, how to improve the sound effect of the sounder becomes the current problem to be solved urgently;

in the related art, the material of the vibrating diaphragm is improved to improve the sound effect of the sounder, but the material with good sound effect is more expensive, which is not beneficial to mass production and popularization; or the power is improved by adopting a mode of increasing the number of turns of the coil, but the coil volume can be increased no matter the number of turns of the coil is increased or the diameter of the coil is increased, which is contrary to the development trend of miniaturization.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: a signaling device for automobile instrument and its manufacturing method are provided, which can improve the sound effect of the signaling device.

In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:

in one aspect, a signaling device for an automobile instrument is provided, including:

the basin stand is provided with a step cavity along the thickness direction of the basin stand;

the magnetic cover and the basin frame are integrally injection molded;

the magnet is fixed at the bottom of the magnetic shield and is used for providing a magnetic field;

a printed coil including a fixed base material in a tubular shape and a wiring printed on the fixed base material at a low temperature;

a main coil wound on the printed coil;

the sound film is fixedly connected with one end of the main coil, and the edge of the sound film is fixed at the edge of the basin frame;

the welding sheet is fixed on the bottom surface of the basin frame and used for connecting the main coil and the printed coil;

the inner diameter of the printed coil is larger than the outer diameter of the magnet, and when the printed coil and the main coil are electrified, the main coil and the printed coil reciprocate in the thickness direction of the magnet so as to drive the sound membrane to vibrate.

Further, the material of the fixed base material is a PI film.

Further, the wiring printed on the fixed substrate is fixed on a lightweight heat-resistant substrate.

Further, the lightweight heat-resistant substrate is kraft paper.

Further, the lines are printed on the inner and/or outer walls of the stationary substrate.

Further, the wire is spirally wound in a single direction on the inner wall or the outer wall of the fixed substrate for printing.

Further, the bottom surface of the step cavity is also provided with a vent hole.

Further, a damping mesh cloth covering the vent holes is also fixed on the bottom surface of the step cavity.

Further, the top surface of the magnet is also provided with a pole piece, and the pole piece is used for magnetically guiding the positive pole of the magnet into the magnetic gap.

The invention also provides a manufacturing method of the signaling device for the automobile instrument, which comprises the following steps:

integrally injection molding the basin stand and the magnetic cover;

the magnet is fixed at the middle position of the bottom of the magnetic shield;

fixing the pole piece on the upper surface of the magnet;

sticking damping mesh cloth on the bottom surface of the basin stand;

fixing the soldering lug on the basin stand;

printing a printing coil and fixing the printing coil on a light heat-resistant base material;

winding a main coil on the printed coil, and fixing one end of the main coil on the sound film;

connecting the connecting line of the main coil and the printing coil on the connecting point of the soldering lug;

and fixing the sound membrane on the basin frame.

The beneficial effects of the invention are as follows: according to the invention, the printed coil manufactured by low-temperature printing is added in the main coil, so that the number of turns of the coil is further increased in a limited space, and the BL value of a product is increased, so that the sound pressure of the sounder under the same volume is increased.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.

FIG. 1 is a schematic diagram of an explosion structure of a signaling device for an automobile instrument according to an embodiment of the present invention;

FIG. 2 is a flowchart of a method for manufacturing a signaling device for an automobile instrument according to an embodiment of the invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The signaling device for the automobile instrument shown in fig. 1 comprises a basin frame 3, a magnetic cover 4, a magnet 5, a printed coil 7, a main coil 8, a sound film 9 and a soldering lug 1, wherein:

the basin frame 3 is provided with a step cavity along the thickness direction, the basin frame 3 plays a role in supporting all parts, the basin frame is formed by injection molding through a die, and the step cavity is used for fixing the sound membrane 9 on one hand and providing a space for vibration of the sound membrane 9 on the other hand;

the magnetic shield 4 and the basin frame 3 are integrally injection molded, the magnetic shield 4 is of a barrel type structure, and the processing efficiency and the processing precision are improved in an integral injection molding mode with the basin frame 3.

The magnet 5 is fixed at the bottom of the magnetic cover 4 and is used for providing a magnetic field; in the concrete fixation, the magnet 5 can be fixed at the bottom of the magnetic cover 4 by adopting structural adhesive; a magnet 5 for providing a magnetic field required for the coil movement;

the printed coil 7 includes a fixed base material in a tubular shape and a wiring printed on the fixed base material at a low temperature; the low-temperature printing means that the circuit raw material for conducting is made into a liquid shape, then is printed into a preset shape by a printer, and is then formed by irradiation of a cold light source, and the thickness of the printed coil 7 can be made very thin by low-temperature printing, so that the sound pressure is improved on the basis of not influencing the volume of the main coil 8.

The main coil 8 is wound on the printed coil 7, the main coil 8 is wound on the printed coil 7 by adopting a conventional enameled wire through a winding machine, and the winding method is the same as the conventional winding method, but the main coil 8 is directly wound on the printed coil 7 and fixed, so that the original die demoulding process is omitted, and the processing efficiency is improved;

the sound film 9 is fixedly connected with one end of the main coil 8, and the edge of the sound film is fixed at the edge of the basin frame 3; after the winding of the main coil 8 is completed, the main coil is adhered to the middle position of the bottom of the sound film 9 through glue;

the soldering lug 1 is fixed on the bottom surface of the basin frame 3 and is used for connecting the main coil 8 and the printed coil 7; the soldering lug 1 is fixed on the basin frame 3 in a hot pressing mode during specific fixing, is connected with the printed coil 7 and the lead wire of the main coil 8, and is used for connecting the coil with the outside;

wherein, the internal diameter of the printing coil 7 is larger than the external diameter of the magnet 5, when the printing coil 7 and the main coil 8 are electrified, the main coil 8 and the printing coil 7 reciprocate in the thickness direction of the magnet 5 to drive the vibration of the sound membrane 9.

In the above embodiment, the printed coil 7 made by low-temperature printing is added inside the main coil 8, so that the number of turns of the coil is further increased in a limited space, and the BL value of the product is increased, so that the sound pressure of the sounder under the same volume is increased.

Based on the above embodiment, in the embodiment of the present invention, the material of the fixing substrate is PI film, and it should be noted that, because the requirement of low-temperature printing on the membrane is low, a thinner material can be adopted, for example, TPU material can also be adopted to further reduce the weight of the fixing substrate; in addition, since it is thin and lightweight, in order to fix its shape, after the wiring is printed on the fixed substrate, the wiring printed on the fixed substrate is again fixed on the lightweight heat-resistant substrate, which may be a heat-resistant, lightweight, low-cost material such as kraft paper.

In the embodiment of the invention, the circuit is printed on the inner wall or the outer wall of the fixed base material, and can be fixed on the inner wall and the outer wall at the same time, so that the number of turns of the coil is increased, and the sound pressure in the same volume is increased; meanwhile, in order to improve the efficiency of the coil, in the embodiment of the invention, the circuit is spirally wound and printed on the inner wall or the outer wall of the fixed substrate in a single direction.

With continued reference to fig. 1, in an embodiment of the present invention, the bottom surface of the step cavity is further provided with a vent hole. The vent hole is a hole on the bottom surface of the step cavity, and is used for gas circulation when the sound membrane 9 vibrates, and in order to realize the adjustment of the vibration of the sound membrane 9, in the embodiment of the invention, the damping mesh cloth 2 covering the vent hole is also fixed on the bottom surface of the step cavity. The damping mesh cloth 2 can achieve the effect of adjusting damping of the inner cavity of the product by changing the density of the damping mesh cloth, and can also achieve the effects of ash prevention and even water prevention.

In a preferred embodiment of the invention, the top surface of the magnet 5 is also provided with a pole piece 6, the pole piece 6 being used for magnetically guiding the positive pole of the magnet 5 into the magnetic gap. Through the setting of pole piece 6, can optimize the inside magnetic field distribution of product to the atress effect when further improving sound membrane 9 vibration.

The embodiment of the invention also provides a manufacturing method of the signaling device for the automobile instrument shown in fig. 2, which comprises the following steps:

s10: the basin stand 3 and the magnetic cover 4 are integrally injection molded; the processing efficiency of the product is improved through integral injection molding;

s20: the magnet 5 is fixed at the middle position of the bottom of the magnetic cover 4; the specific fixing manner is already mentioned above, and is not repeated here;

s30: fixing a pole piece 6 on the upper surface of the magnet 5; it should be noted here that the outer diameter of the pole piece 6 is not larger than the outer diameter of the magnet 5, so that continuity in vibration of the diaphragm 9 can be ensured;

s40: sticking damping net cloth 2 on the bottom surface of the basin frame 3;

s50: fixing the soldering lug 1 on the basin stand 3;

s60: printing a printing coil 7 and fixing the printing coil on a light heat-resistant base material;

s70: winding a main coil 8 on the printed coil 7, and fixing one end of the main coil 8 on the sound film 9;

s80: connecting the main coil 8 and the printed coil 7 to the connection point of the soldering lug 1;

s90: the sound membrane 9 is fixed on the basin frame 3.

It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The manufacturing method of the signaling device for the automobile instrument is characterized in that the signaling device for the automobile instrument comprises the following steps:

the magnetic cover and the basin frame are integrally injection molded;

a main coil wound on the printed coil;

the inner diameter of the printed coil is larger than the outer diameter of the magnet, and when the printed coil and the main coil are electrified, the main coil and the printed coil reciprocate in the thickness direction of the magnet so as to drive the sound membrane to vibrate;

the manufacturing method comprises the following steps:

integrally injection molding the basin stand and the magnetic cover;

fixing the pole piece on the upper surface of the magnet;

sticking damping mesh cloth on the bottom surface of the basin stand;

fixing the soldering lug on the basin stand;

and fixing the sound membrane on the basin frame.

2. The method of claim 1, wherein the material of the fixing base is PI film.

3. The method of manufacturing a signaling device for an automobile instrument according to claim 2, wherein the wiring printed on the fixed substrate is fixed on a lightweight heat-resistant substrate.

4. The method of manufacturing a signaling device for an automobile instrument according to claim 3, wherein the lightweight heat-resistant base material is kraft paper.

5. The method of manufacturing a signaling device for an automobile instrument according to claim 1, wherein the wiring is printed on an inner wall and/or an outer wall of the fixed base material.

6. A method of manufacturing a signaling device for an automobile instrument according to claim 3, wherein the wiring is spirally wound and printed in a single direction on the inner wall or the outer wall of the fixed base material.

7. The method of manufacturing a signaling device for a vehicle instrument according to claim 1, wherein the step chamber further has a vent hole on a bottom surface thereof.

8. The method of manufacturing a signaling device for a vehicle instrument according to claim 7, wherein a damping mesh covering the vent hole is further fixed to the bottom surface of the step cavity.

9. The method of claim 1, wherein the top surface of the magnet further comprises a pole piece for magnetically guiding the positive pole of the magnet into the magnetic gap.