Browse Prior Art Database

Top Cover with dimple rib

IP.com Disclosure Number: IPCOM000013321D
Original Publication Date: 2001-Dec-29
Included in the Prior Art Database: 2003-Jun-18
Document File: 3 page(s) / 639K

Publishing Venue

IBM

Abstract

By contacting a CrashStop to a TopCover, vibration of actuator could be

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Top Cover with dimple rib

By contacting a CrashStop to a TopCover, vibration of actuator could be

suppressed and operating noise was able to be lowered.

The vibration(2kHz~4kHz) from actuator is cited as one factor as a cause that

operating noise is large.(Refer to Fig.1 the vibration of a 2kHz Top Cover)

Then, in order to press down vibration of the VCM which is resonating with the

TopCover, it decided to contact the upper surface of Crash Stop and the Top

Cover to press down vibration

Fig. 2 is the place which attached the dimple rib to the TopCover in order to

contact CrashStop to a TopCover.

Fig. 3 shows the place of CrashStop.

It succeeded in this lowering 1dbA of operating noise by pressing down

resonance.[Fig.4]

Actuator

CrashStop VCM

[Fig.1]

1

[This page contains 2 pictures or other non-text objects]

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dimple rib

CrashStop

Actuator

VCM

[Fig.2]

[Fig.3]

125 250 500 1,000 2,000 4,000 8,000 A

Before

22.51 17.40 23.26 21.27

31.31

24.94 22.92

34.17

After

21.30 15.36 21.84 21.09

29.83

24.81 22.74

33.12

AcousticResult

(dbA)

35.00

Before

After

30.00

25.00

20.00

15.00

125 250 500 1,000 2,000 4,000 8,000 A

Frequency (Hz)

[Fig.4]

2

[This page contains 3 pictures or other non-text objects]

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3