CN109963208A - An audio device with high buoyancy - Google Patents

Abstract

The invention discloses an audio device with high buoyancy in the technical field of audio equipment, comprising a casing and an audio playing system arranged in the casing. , the upper end of the lower casing is sealed with the upper casing, the lower casing is provided with a buoyancy chamber, the lower casing includes a waterproof casing and a buoyancy body arranged on the inner side of the waterproof casing, the outer side of the waterproof casing is coated with hydrophobic material, and the upper end of the base and The lower shell is sealed and connected, and the audio playback system is fixed on the base. The present invention can cooperate with the user to provide life-saving support in the case of accidental drowning on the basis of ensuring the normal playback of audio information, and the overall product structure is stable and the cost is low.

Description

An audio device with high buoyancy

technical field

The invention relates to the technical field of audio equipment, in particular to an audio device with high buoyancy.

Background technique

Swimming is a favorite recreational activity, and it is also a highly recommended exercise. While swimming, the muscles of the whole body can be exercised, and the blood circulation will be smoother, which is of great help to maintain the health of the body. But swimming drowning accidents happen more often. According to child safety data, drowning accidents and traffic accidents have become the biggest killers of primary and secondary school students. Drowning and traffic accidents account for 43.59% and 30.26% of the death toll respectively. Nearly 30,000 children die from drowning every year, which has become an abnormal death of students. the number one killer.

In addition, people often use speakers to play music during swimming. Now, wireless speakers for music playback have also been launched on the market for water sports enthusiasts, which can meet the needs of users to enjoy music at the beach, swimming pool, shower, surfing, and outdoors. . However, the current speaker shells on the market are made of silicone materials or other ordinary plastics, and their buoyancy can only maintain their own buoyancy requirements, but cannot assist users in self-rescue when drowning, and cannot achieve better buoyancy requirements.

The above shortcomings are worth solving.

SUMMARY OF THE INVENTION

In order to overcome the deficiencies of the existing technology, the present invention provides an audio device with high buoyancy. The present invention can cooperate with the user to provide life-saving support in the event of accidental drowning on the basis of ensuring the normal playback of audio information. The overall product structure Stable and low cost.

The technical scheme of the present invention is as follows:

An audio device with high buoyancy, comprising a casing and an audio playback system arranged in the casing, wherein the casing comprises:

an upper casing, wherein a broadcasting cavity is arranged in the upper casing;

A lower casing, the upper end of the lower casing is sealed with the upper casing, a buoyancy cavity is arranged in the lower casing, and the lower casing includes a waterproof casing and a buoyancy body arranged on the inner side of the waterproof casing. The outer side of the waterproof shell is coated with a hydrophobic material;

A base, the upper end of the base is sealed with the lower shell, and the audio playback system is fixed on the base.

The present invention according to the above solution is characterized in that the bottom of the waterproof casing is provided with a fixing hole, and the bottom of the buoyant body passes through the fixing hole and is then fastened and connected to the waterproof casing.

Further, a sealing gasket is sleeved on the outer side of the bottom of the buoyancy body, and a sealing bolt passes through the sealing gasket and is fixedly connected to the buoyancy body.

The present invention according to the above solution is characterized in that the audio playback system includes a controller, a battery module and at least one speaker, the controller is electrically connected to the battery module and the speaker respectively; The battery module is arranged in the buoyancy cavity, and the speaker is arranged in the broadcasting cavity.

The present invention according to the above solution is characterized in that a solar power panel is provided on the top of the upper casing, and the solar power panel supplies power to the battery module.

The present invention according to the above aspect is characterized in that a safety belt is fixed on the outer side of the outer casing.

The present invention according to the above aspect is characterized in that, the hydrophobic material is coated on the surface of the waterproof casing by an adhesive.

Further, the binder is resin.

The present invention according to the above scheme is characterized in that, in the process of preparing the hydrophobic material, nano-SiO ₂ sol is prepared first; Methoxysilane is used as agglomeration agent of nano-SiO ₂ sol to build micro-nano rough structure; hexadecyltrimethoxysilane is used for particle hydrophobic modification; bonded by binder, super-hydrophobicity with good hydrophobicity is prepared. Hydrophobic composite.

Further, using ethyl orthosilicate as a raw material, the nano-SiO ₂ sol is prepared by a sol-gel method.

The present invention according to the above scheme is characterized in that the buoyant body is prepared by using epoxy resin and hollow glass microspheres as raw materials, and the mass ratio of the epoxy resin to the raw materials is 2-10%. The mass ratio of glass beads to raw materials is 90-98%.

The present invention according to the above scheme is characterized in that, in the process of preparing the buoyant body, the following steps are specifically included:

(1) First, the hollow glass beads are screened and surface treated;

(2) Add the treated hollow glass microspheres to the modified UPR in stages, and stir in a vacuum state;

(3) Add co-curing agent and curing agent successively, and conduct vacuum stirring;

(4) Pour the stirred mixture into a mold, and place the mold at a certain temperature to solidify;

(5) Curing the cured semi-finished products at high temperature;

(6) Demoulding after cooling, and post-processing to obtain a high-strength buoyant body.

Further, in the step (1), the hollow glass microspheres are subjected to compression screening, and then put into the prepared silane coupling agent solution for surface treatment.

Further, the silane coupling agent solution accounts for 0.5-1.5% of the mass of the hollow glass microspheres.

Further, the silane coupling agent solution is formed by mixing silane, alcohol and water, wherein the mass percentages of silane, alcohol and water are 20%, 72% and 8% respectively.

Further, the alcohol includes ethanol, methanol and isopropanol.

Further, in the step (3), the co-curing agent is a cobalt naphthenate accelerator, and the curing agent is a methyl ethyl ketone peroxide curing agent.

According to the present invention according to the above scheme, the beneficial effect of the present invention is that, by coating the hydrophobic material, the waterproof casing can fully realize the hydrophobic function, so that the surface has extremely strong hydrophobic, hydrophobic and waterproof effects; the present invention is locked in the waterproof casing. More than a buoyant body, it can provide higher buoyancy, and under the condition of ensuring the buoyancy of the audio device itself, it can provide auxiliary buoyancy for users to assist them in drowning self-rescue, and provide a higher safety guarantee; the overall structure of the present invention is compact and stable, It is not easy to be damaged, and can fully reduce the cost of raw materials.

Description of drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is an enlarged view of part I in FIG. 1 .

Fig. 3 is a flow chart of preparing a buoyant body in the invention.

In the figure, 11, waterproof casing; 12, buoyant body; 13, upper casing; 14, base; 20, sealing bolt; 21, gasket; 31, buoyancy chamber; 32, broadcasting chamber; 41, controller; 42 , battery module; 43, speaker; 44, solar power panel.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

As shown in FIG. 1, an audio device with high buoyancy includes a housing and an audio playback system arranged in the housing. The audio playback system includes a controller 41, a battery module 42 and at least one speaker 43. The controller 41 is connected to the battery respectively. The module 42 and the speaker 43 are electrically connected.

The outer shell includes an upper shell 13, a lower shell and a base 14, wherein the upper shell is provided with a broadcasting cavity 32, and the speaker 43 is arranged in the broadcasting cavity 35; the upper end of the lower shell is sealed with the upper shell 13, and the lower shell is provided with There is a buoyancy chamber 31, the controller 41 and the battery module 42 are arranged in the buoyancy chamber 31, the lower casing includes a waterproof casing 11 and a buoyancy body 12 arranged inside the waterproof casing 11; the upper end of the base 14 is sealed with the lower casing. The playback system is fixed on the base 14 .

The controller 41 is provided with a storage unit, an audio processing unit and a power supply control unit. The audio processing unit is respectively connected with the speaker, the storage unit and the power supply control unit, and the power supply control unit is connected with the battery module. Inside the controller, the specific processing process of the audio signal can adopt the existing common processing method, which is not an improved part of the present invention, so it will not be described in detail.

As shown in FIG. 2 , the bottom of the waterproof casing 11 is provided with a fixing hole, the bottom of the buoyancy body 12 is connected with the waterproof casing 11 after passing through the fixing hole. The over-sealing gasket 21 is fixedly connected with the buoyancy body 12 . Through the sealing and fixing of the waterproof casing 11 , the buoyancy body 12 and the base 14 , the sealing effect of the entire audio device is ensured, and the structural stability of the entire product is increased.

The outer side of the waterproof casing 11 is coated with a hydrophobic material, and the hydrophobic material forms a water-resistant layer on the outer side of the waterproof casing 11, and its hydrophobic angle is ≥160°, so that the surface of the waterproof casing 11 has strong hydrophobic, hydrophobic and waterproof effects. During the preparation of hydrophobic materials:

1. First prepare nano-SiO ₂ sol (using ethyl orthosilicate as raw material, prepare nano-SiO ₂ sol by sol-gel method);

2. After that, aminopropyltriethoxysilane and γ-diethylenetriaminopropylmethyldimethoxysilane are used as agglomeration agents for nano-SiO ₂ sol to construct a micro-nano rough structure;

3. Use hexadecyltrimethoxysilane for particle hydrophobic modification;

4. Using resin as a binder, a superhydrophobic composite material with good hydrophobic properties was prepared.

The hydrophobic material is coated on the surface of the waterproof casing through an adhesive, and the adhesive is preferably a resin, so as to improve the adhesion between the coating and the substrate.

The buoyant body is prepared by using epoxy resin and hollow glass microspheres as raw materials. The mass ratio of epoxy resin to raw materials is 2-10%, and the mass ratio of hollow glass microspheres to raw materials is 90-98%. The hollow glass beads are bonded together by epoxy resin, which helps the hollow glass beads to support each other. Therefore, the epoxy resin not only plays the role of bonding and supporting the glass beads, but also determines the electrical properties and thermal properties of the buoyant body. performance and chemical stability; at the same time, the mass ratio of hollow glass beads can maximize the buoyancy of the buoyant body.

The present invention adopts epoxy resin as one of the raw materials of the buoyant body, and it has the following characteristics:

(1) High bonding strength and wide bonding surface

The epoxy resin has hydroxyl, ether bonds and extremely active epoxy groups in the structure, which make the molecules of the epoxy resin and adjacent interfaces produce electromagnetic adsorption or chemical bonds, especially the epoxy groups can also occur under the action of the curing agent. The cross-linking polymerization reaction generates macromolecules with a three-dimensional network structure, and the molecules themselves have a certain cohesive force.

Therefore, epoxy resin has good adhesion with most metals and non-metals, and its bonding strength with many non-metallic materials (glass, ceramics, etc.) often exceeds the strength of the material itself. Therefore, it is used as the composite matrix of the buoyant body.

(2) Low shrinkage

The curing of epoxy resin mainly relies on the ring-opening addition polymerization of epoxy groups, so no low molecular weight substances are produced during the curing process; in addition, epoxy resin itself has secondary hydroxyl groups, plus some residues derived from epoxy groups when curing Hydroxyl groups, their hydrogen bond associations make the molecules closely arranged, so the curing shrinkage of epoxy resins is one of the lowest among thermosetting resins (usually 1-2%, if appropriate fillers are used, the shrinkage can be reduced to 0.2% or so).

(3) Good stability

The main chain of the cured epoxy resin is ether bond and benzene ring, and the three-dimensional cross-linking structure is dense and closed, so it is resistant to acid and alkali, and its corrosion resistance is better than that of phenolic resin and polyester resin. The material is not damaged when used in seawater at 20-40℃ for 24 months.

(4) Excellent electrical insulation

The cured epoxy resin has low water absorption and no longer has active groups and free ions, so it has excellent electrical insulation.

(5) High mechanical strength

The cured epoxy resin has strong cohesion and dense molecular structure, so its mechanical strength is relatively higher than that of phenolic resin and polyester resin.

(6) Good processing performance

Epoxy resin has high flexibility, and its processing technology and product properties are diverse.

The invention adopts hollow glass microspheres as one of the raw materials of the buoyant body, and its quality plays a decisive role in the performance of the material. Hollow glass microspheres are a new type of lightweight non-metallic multi-functional material. Its diameter is between several microns and hundreds of microns, and the appearance is gray or gray, loose and good fluidity. Among them, the most commonly used inorganic hollow microbeads are hollow glass microbeads.

Hollow glass microspheres are spherical, which is the shape with the smallest surface area under the same volume in nature. Therefore, hollow glass microspheres have the characteristics of high compressive strength, high melting point, high resistivity, small thermal conductivity and thermal shrinkage coefficient. Hollow glass microspheres have the following properties:

(1) The density of hollow glass microspheres is small, the bulk density is 0.1-0.3 g/cm ³ , and the actual density is about 0.1-0.5 g/cm ³ . As a filler, the density of the material can be significantly reduced, thereby preparing low-density composite materials, and then Provides higher buoyancy.

(2) The hollow glass microspheres are smooth and round in shape, isotropic, without sharp corners, so there is no high stress concentration phenomenon, which can effectively prevent stress cracking. Compared with other shaped fillers, spherical microbeads have the smallest specific surface area.

(3) Since the glass microspheres are smooth and have considerable crush resistance, the viscosity of the curing reaction system will not be very large, the wear on the kneader and the mold forming machine is very small, and the fluidity in the runner and the mold is small. it is good.

(4) The expansion coefficient of hollow glass microspheres is small, the dispersibility in the resin is good, and it is isotropic, so it can effectively reduce the shrinkage of the product and prevent the bending and warping of the product caused by the residual strain, which is conducive to improving the The stability of the buoyant body.

(5) Hollow glass microspheres have high chemical stability, acid and alkali resistance and radiation resistance.

(6) The bulk density is very small. As a polymer filling material, it is less used than other mineral fillers, and the loading weight is small, which saves the amount of polymer, so it can reduce the cost of the product.

In addition, hollow glass also has the following characteristics: good thermal stability, flame retardant, thermal decomposition temperature greater than 1450 ℃, not easy to deform, as a polymer filling material, it can improve the flame retardant properties of polymers, and can be used in building materials and paint industries. ; Good electrical insulation, can be used as filler for various electrical switchgear, instrument panels, electronic packaging materials; good transparency, can be used to manufacture translucent products, glass beads can also absorb ultraviolet rays, improve the light stability and light reflection of products sex.

As shown in Figure 3, in the process of preparing the buoyant body, the following steps are specifically included:

1. First, the hollow glass beads are screened and surface treated.

The hollow glass microspheres are subjected to compression screening, and then put into the prepared silane coupling agent solution for surface treatment. Wherein, the silane coupling agent solution is formed by mixing silane, alcohol and water, wherein the mass percentages of silane, alcohol and water are respectively 20-25%, 60-75%, 5-10% (preferably 20%) , 72%, 8%).

Preferably, the alcohol includes ethanol, methanol and isopropanol. Among them, ethanol is selected to form p-ethoxysilane; methanol is selected to form p-methoxysilane; isopropanol is selected to form a silane that is not easily soluble in ethanol and methanol.

In this embodiment, the silane coupling agent solution accounts for 0.5-1.5% of the mass of the hollow glass beads, which can improve the dispersibility and adhesion of the treated hollow glass beads in the epoxy resin, and improve the inorganic filler and epoxy resin. Compatibility, improve process performance and improve mechanical, electrical and weather resistance of filled plastics (including rubber).

2. Add modifier in epoxy resin to reduce curing shrinkage, improve flame retardant and heat resistance, strengthen toughening, corrosion resistance, etc.

Afterwards, the treated hollow glass microspheres were added to the modified UPR (ie, unsaturated polyester resin) in stages, and were stirred in a vacuum state. The stirring speed was adjusted according to the viscosity of the system, and the vacuum degree was controlled, and the stirring was carried out for 30 min.

3. First add co-curing agent (preferably cobalt naphthenate accelerator, the amount of which is 1-2% of the mass of epoxy resin), and stir in vacuum for 10 min; add post-curing agent (preferably methyl ethyl ketone peroxide curing agent, its The dosage is 2-4% of the mass of epoxy resin), and vacuum stirring for 10 min.

4. Pour the stirred mixture into a mold, and place the mold at a certain temperature (preferably 100-105°C) to solidify.

5. Curing the cured semi-finished products at high temperature (curing temperature is 200℃).

6. Demoulding after cooling, and post-processing (ie, deburring, trimming the overflow part) to obtain a high-strength buoyant body.

In this embodiment, a solar power panel is provided on the top of the upper casing, and the solar power panel supplies power to the battery module, which ensures the stability of the energy source of the audio device.

In this embodiment, a safety belt is fixed on the outer side of the outer shell, and the user fastens the safety belt when swimming, so as to provide enough buoyancy for the user to ensure safety while stopping for entertainment.

It should be understood that, for those skilled in the art, improvements or changes can be made according to the above description, and all these improvements and changes should fall within the protection scope of the appended claims of the present invention.

The patent of the present invention has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the realization of the patent of the present invention is not limited by the above methods, as long as various improvements made by the method concept and technical solutions of the patent of the present invention are adopted, or no improvement is made. It is within the protection scope of the present invention to directly apply the concept and technical solution of the patent of the present invention to other occasions.

Claims (10)

1. an audio device with high buoyancy, comprising a casing and an audio playback system arranged in the casing, wherein the casing comprises: an upper casing, wherein a broadcasting cavity is arranged in the upper casing; A lower casing, the upper end of the lower casing is sealed with the upper casing, a buoyancy cavity is arranged in the lower casing, and the lower casing includes a waterproof casing and a buoyancy body arranged on the inner side of the waterproof casing. The outer side of the waterproof shell is coated with a hydrophobic material; A base, the upper end of the base is sealed with the lower shell, and the audio playback system is fixed on the base. 2 . The audio device with high buoyancy according to claim 1 , wherein the audio playback system comprises a controller, a battery module and at least one speaker, and the controller is respectively connected with the battery module and the speaker. 3 . Electrical connection; the controller and the battery module are arranged in the buoyancy cavity, and the speaker is arranged in the broadcasting cavity. 3 . The audio device with high buoyancy according to claim 1 , wherein a solar power panel is provided on the top of the upper casing, and the solar power panel supplies power to the battery module. 4 . 4 . The audio device with high buoyancy according to claim 1 , wherein, in the process of preparing the hydrophobic material, nano-SiO ₂ sol is prepared first; Diethylenetriaminepropylmethyldimethoxysilane was used as agglomeration agent for nano _- SiO sol to build micro-nano rough structure; hexadecyltrimethoxysilane was used for particle hydrophobic modification; A superhydrophobic composite with good hydrophobicity was prepared. 5 . The audio device with high buoyancy according to claim 1 , wherein the buoyant body is prepared by using epoxy resin and hollow glass microspheres as raw materials, and the epoxy resin accounts for the mass ratio of the raw materials. 6 . is 2-10%, and the mass ratio of the hollow glass microspheres to the raw material is 90-98%. 6. The audio device with high buoyancy according to claim 1, characterized in that, in the process of preparing the buoyant body, it specifically comprises the following steps: (1) First, the hollow glass beads are screened and surface treated; (2) Add the treated hollow glass microspheres to the modified UPR in stages, and stir in a vacuum state; (3) Add co-curing agent and curing agent successively, and perform vacuum stirring; (4) Pour the stirred mixture into a mold, and place the mold at a certain temperature to solidify; (5) Curing the cured semi-finished products at high temperature; (6) Demoulding after cooling, and post-processing to obtain a high-strength buoyant body. 7 . The audio device with high buoyancy according to claim 6 , wherein in the step (1), the hollow glass microspheres are subjected to compression screening, and then placed into the prepared silane coupling device. 8 . surface treatment in solution. 8 . The audio device with high buoyancy according to claim 7 , wherein the silane coupling agent solution accounts for 0.5-1.5% of the mass of the hollow glass beads. 9 . 9 . The audio device with high buoyancy according to claim 7 , wherein the silane coupling agent solution is formed by mixing silane, alcohol and water, wherein silane, alcohol and water account for 100% by mass respectively. 10 . 20-25%, 60-75%, 5-10%. 10 . The audio device with high buoyancy according to claim 6 , wherein in the step (3), the co-curing agent is a cobalt naphthenate accelerator, and the curing agent is methyl ethyl ketone peroxide 10 . Hardener.