th-1

약한 자석으로 큰 소리를 낼 수 있는 보산하이테크만의 노하우

저희 계열사인 yulrim magnet의 자석제조업 초기에 몇 곳의 버저 제조사로부터 자석 납품 의뢰를 받았습니다. 이 자석을 납품하면서 들었던 의문점은 ‘왜 이렇게 비효율 적이며 복잡한 구조를 가지고 있는가’ 였습니다. 이 발상으로부터 bosan hitech의 역사는 시작됩니다.

당시 일본회사를 필두로 한 모든 버저 제조사들은 등방성 네오디뮴 자석(isotropic neodymium magnet)을 사용하여 제품을 만들고 있었습니다. 이 네오디뮴 자석은 단위 체적당 자력의 세기는 월등히 높았지만, 복잡한 형상을 구현하는데는 문제가 많았습니다. 그래서 저희 회사는 이방성 페라이트자석(Anisotropic Ferrite magnet) 으로 일체명 버저를 개발하게 되었습니다.

external link : the difference between the isotropic magnet and anisotropic magnet

소재 등방성 네오디뮴자석 이방성 페라이트
성형방법 소결/본디드 사출
자재비용 높고 불안정함 2,390 G
단위체적당 자속밀도 7,200 G 2,390 Gauss
형상의 복잡도 낮음 높음
제품에 적용된 자석의 체적 25 mm3 150 mm3
녹발생여부 발생 녹슬지 않음

위 표에서 표기된 바와 같이, 동일한 체적에서 나오는 자력을 비교해 봤을 때는 경쟁사에서 사용하는 자석의 자력이 높지만, 아래 그림과 같이 버저의 몸체를 자석으로 만들게 되었을 경우 체적이 제품에 따라 5-10배 정도 늘어나기 때문에 결과적으로 더 강한 자력을 얻을 수 있게 됩니다.

버저의 경우 자력이 셀수록 큰 소리를 얻는데 유리해집니다. 저희 보산하이테크에서 만드는 모든 버저는 이러한 자재 / 공정을 사용함으로써 고객이 원하는 큰 소리의 제품을 안정적인 가격으로 공급할 수 있는 기술적인 원천을 가지게 되었습니다(2017년에 중국 산업계에서 일방적으로 네오디뮴 자석의 단가를 인상 혹은 생산중단하여 관련 업체가 많은 타격을 보았지만 보산하이테크는 이로 인한 아무 영향을 받지 않았습니다)

이런 기술적인 개선으로 인한 결실을 많은 고객들에게 만족으로 안겨드릴 수 있도록 항상 최선을 다하겠습니다

th001-1

Introducing BSMT-1140T series-bg

Introducing BSMT-1140T series,
The Most versatile SMD magnetic transducer in the industry.

From the establishment in 1997, our goal has always been making SMD magnetic transducers as a major product in the buzzer industry where THT type had been dominating.
After hearing customer all over the world’s feedback and getting through in-depth research, we finally developed new SMD magnetic transducer – BSMT-1140T series – with top versatility explained in this document.
Please find out why this part is different from others, and contact us or visit our booth.

 

Advantage1
Lowest priced SMD buzzer on the market

Cost Comparison of Buzzers

In the case of other electronic component industry, many customers have switched from THT to SMD, as cost in using both was at the same level. However, it was not the case in the buzzer industry yet, so there had always been a high demand for more affordable SMD buzzers from customers.

This was one of those things that we have focused. We planned to make part with good performance and reliability, at the same cost comparing to THT type. To do this, we had to build our production process from bottom to top, to cut out labor cost which is quite expensive in Korea.

Though there still is price difference as seen in above chart, we expect that there will be no worries in switching from THT to SMD buzzer in the future considering the mounting cost, productivity, and failure ratio.

 

Advantage2 –
Patented simple structure which brings high reliability

An explanation of Structural difference against other makers’ buzzer

How does this difference bring reliability?

A. Simpler part, constant quality.
As shown in above comparison, Bosan part’s main body is uni-body made of magnet, while other parts in the industry is consisted with 2~3 subparts which requires bonding/welding.
This simple structure promises an important internal factor in generating sound to be in high volume. This also promises that there will be less internal deformation due to high temperature.

B. Less parts, less processes
Since smaller number of parts are required to build Bosan’s part, it is much easier to develop automated machines with high efficiency. Bosan has succeeded in developing those 10 years ago thanks to the simple structure, and the machines has got more accurate each year since then.

C. Un-manned coil winding
Unlike buzzers from other manufacturer in this industry, Bosan buzzer’s simple structure enables its coil to be directly wound and soldered inside of part with full auto machine. With well designed machine management system, all the coils are wound and soldered with machine accuracy so this part has less chance of getting defected after pick-n-place and reflow process.

 

Advantage3 – Swiftness and agility

Problem – what is happening in the industry

We receive inquiry from many customers all over the world complaining about former supplier’s irresponsible delivery. We see this problem arising from the culture of the Chinese industry, where most suppliers prefer doing manufacturing and distribution at the same time.
In other words, most of accidents happen because those suppliers forward product from its competitor.

We were in the same situation as well as those manufacturers years ago. Investing facilities/equipments for various kinds of product was not optimistic in most of cases. So we had to import from Chinese manufacturers and resell to customers.

Solution we have implemented

As time goes by however, we found out that it was essential to have a production system which can meet agility and reliability at the same time in the era of industrial booming. So we studied a production line which can produce from a hatchback to a sedan in one place, and the implementation was successful eventually.

As of 2017 this system is ready for SMD magnetic transducer, which is the major product of Bosanhitech. The first product from this system is BSMT-1140T series which we will introduce by this document and the Global Source trade show. And after collecting customer’s requirement through the show and all the communication, we plan to introduce 2 more product from 2018.

 

Product details
BSMT-1140T series

-. how to read part number

 Part number  BSMT-1140T-3024  BSMT-1140T-5024 BSMT-1140T-1420
dimension 11.0 x 11.0 x 4.0 mm
 rated voltage (Vo-p)  3.0  5.0 12.0
 operating voltage (Vo-p)  1.5 ~ 4.5 3 ~ 7  9.0 ~ 15.0
 rated frequency (Hz)  2,400 2,400  2,000
 DC resistance (Ω)  20±3 50±5  140±14
 min. SPL at 10 cm (dBA)  88 90  90
 lead material    Tin plated Brass
 housing material   LCP

 

th001-1

Introducing BSMT-1140T series

Introducing BSMT-1140T series,
The Most versatile SMD magnetic transducer in the industry.

From the establishment in 1997, our goal has always been making SMD magnetic transducers as a major product in the buzzer industry where THT type had been dominating.
After hearing customer all over the world’s feedback and getting through in-depth research, we finally developed new SMD magnetic transducer – BSMT-1140T series – with top versatility explained in this document.
Please find out why this part is different from others, and contact us or visit our booth.

 

Advantage1
Lowest priced SMD buzzer on the market

Cost Comparison of Buzzers

In the case of other electronic component industry, many customers have switched from THT to SMD, as cost in using both was at the same level. However, it was not the case in the buzzer industry yet, so there had always been a high demand for more affordable SMD buzzers from customers.

This was one of those things that we have focused. We planned to make part with good performance and reliability, at the same cost comparing to THT type. To do this, we had to build our production process from bottom to top, to cut out labor cost which is quite expensive in Korea.

Though there still is price difference as seen in above chart, we expect that there will be no worries in switching from THT to SMD buzzer in the future considering the mounting cost, productivity, and failure ratio.

 

Advantage2
Patented simple structure which brings high reliability

An explanation of Structural difference against other makers’ buzzer

How does this difference bring reliability?

A. Simpler part, constant quality.
As shown in above comparison, Bosan part’s main body is uni-body made of magnet, while other parts in the industry is consisted with 2~3 subparts which requires bonding/welding.
This simple structure promises an important internal factor in generating sound to be in high volume. This also promises that there will be less internal deformation due to high temperature.

B. Less parts, less processes
Since smaller number of parts are required to build Bosan’s part, it is much easier to develop automated machines with high efficiency. Bosan has succeeded in developing those 10 years ago thanks to the simple structure, and the machines has got more accurate each year since then.

C. Un-manned coil winding
Unlike buzzers from other manufacturer in this industry, Bosan buzzer’s simple structure enables its coil to be directly wound and soldered inside of part with full auto machine. With well designed machine management system, all the coils are wound and soldered with machine accuracy so this part has less chance of getting defected after pick-n-place and reflow process.

 

Advantage3
Swiftness and agility

Problem – what is happening in the industry

We receive inquiry from many customers all over the world complaining about former supplier’s irresponsible delivery. We see this problem arising from the culture of the Chinese industry, where most suppliers prefer doing manufacturing and distribution at the same time.
In other words, most of accidents happen because those suppliers forward product from its competitor.

We were in the same situation as well as those manufacturers years ago. Investing facilities/equipments for various kinds of product was not optimistic in most of cases. So we had to import from Chinese manufacturers and resell to customers.

Solution we have implemented

As time goes by however, we found out that it was essential to have a production system which can meet agility and reliability at the same time in the era of industrial booming. So we studied a production line which can produce from a hatchback to a sedan in one place, and the implementation was successful eventually.

As of 2017 this system is ready for SMD magnetic transducer, which is the major product of Bosanhitech. The first product from this system is BSMT-1140T series which we will introduce by this document and the Global Source trade show. And after collecting customer’s requirement through the show and all the communication, we plan to introduce 2 more product from 2018.