Our Latest Product Release Information (on April 1st,2014) .
We,Heartheart corporation Have Released Gentle Lock Couple into Every Little Pockect on the Earth
Locking Every Heart-To-Heart Link Gently.

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-- Patent applied for. Registered trademark --

This is a screw cap system of a new generation which prevents leaking on impact and is highly child-resistant. The cap is locked and unlocked by turning the ring under it in the same direction as to "close" the cap. Opening the locked cap requires two actions in opposite directions.

Accessible design is realized; lock status can easily be checked either by touching or seeing. The system will largely help prevent possible seismic fires caused by overturning of plastic tanks of oil and contamination of solutions at the medical front, as well as leakage of beverage or cosmetics while carrying.

1.Cap closed - unlocked

Turn the ring under the cap in order to lock.


When locked,the wedge completely fits in the frame.

3.Lock released

Turn the ring further in the same direction to unlock.

Guidance about our patents & trademark licensing.

GentleLock®Cap is able to be applied to various screw caps for bottles and containers. We can provide the license program on our patents.

About other products.

You can apply GentleLock® not only to screw caps but also to other various products such as lockable joints for tubes, detachable connectors for oscillation devices or others.
We are planning to spread business with GentleLock® in varied fields aiming for 'Sanpou yoshi'.


If you'd like to request for information materials, to tell us your demand or you have some queries etc. please contact us by e-mail.

GentleLock division
Heartheart corporaion (Fujisawa City,Japan)
e-mail :

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