1. Field of the Invention
The present invention relates to a combination lock having a second lock mechanism, and more particularly, to a combination lock combining a combination lock mechanism with a key lock mechanism for securing a zipper.
2. Description of the Prior Art
In U.S. Pat. No. 5,557,954, a zipper lock positioned on one side of a zipper for locking a pull tab of the zipper is disclosed. The above-mentioned zipper lock has a combination lock mechanism. The combination lock mechanism includes a plurality of dials exposed on one side of the zipper lock. By switching the dials, the combination lock mechanism is therefore locked or unlocked. The advantage of the combination lock is that the user can unlock it without any special tools or keys as long as he remember the combination code. However, if the user forgets the combination code, the zipper lock can only be unlocked through trial and error, or by destructive means.
It can be seen that the combination lock mechanism is convenient. However, it is also annoying if the user forgets the combination code.
It is therefore a primary objective of the claimed invention to improve the disadvantage of the combination lock mechanism.
According to the claimed invention, a combination lock having a second lock mechanism is disclosed. The combination lock of the present invention combines a combination lock mechanism with a key lock mechanism. The combination lock mechanism is able to unlock and lock the combination lock, while the key lock mechanism allows the user to unlock the combination lock with a key.
These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after having read the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings.
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The lock body 10 includes a lock housing 11, two push-buttons 12, and a lock tongue 13. The push-buttons 12 and the lock tongue 13 are in relation with each other and are positioned in the lock housing 11. The push-buttons 12 can be depressed by a force, such as by fingers, so that the lock tongue 13 is shifted to a locking position (as shown in
In addition, the lock body 10 further includes a stopping member 14. The stopping member 14 can make a linear movement or a rotary movement relative to the lock housing 11. The stopping member 14 can be shifted to a first position for constraining the lock tongue 13 in the locking position (as shown in
The first lock mechanism 20 is a combination lock mechanism including a plurality of dials 21 and a shifting plate 22 positioned in the lock body 10. The shifting plate 22 can be shifted to an unlocking position (as shown in
Since the technology of combination lock mechanism is well known, further details are not repeated here. Comparing to the conventional combination lock, the present invention includes a second lock mechanism 30. The second lock mechanism 30 allows the lock of the present invention to be unlocked in an alternative way. In such case, the lock of the present invention can be locked by the first lock mechanism 20, but can be unlocked by both the first lock mechanism 20 and the second lock mechanism 30.
The second lock mechanism 30 includes a sleeve 31 and a linking member 32 in relation with each other. The sleeve 31 further includes a keyhole 311 for allowing a key “K” to be inserted and for being rotated by the key “K” such that the linking member 32 is shifted and forces the stopping member 14 to change positions.
When the key “K” is not inserted into the keyhole 311, the sleeve 31 and the lock housing 11 are not allowed to move. Once the key “K” is inserted into the keyhole 311, the sleeve 31 is free to rotate relative to the lock housing 11. Please refer to
The sleeve 31 further includes a protrusion 313, while the linking member 32 includes a long hole 321 for receiving the protrusion 313. Please refer to
Therefore, the unlocking action of the lock can be performed by utilizing either the combination lock mechanism or the key lock mechanism.
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In conclusion, the present invention provides a lock combining a combination lock mechanism with the key lock mechanism. Therefore, instead of only being unlocked by the combination lock mechanism, the lock of the present invention can also be unlocked by the key lock mechanism.
Those skilled in the art will readily observe that numerous modifications and alterations of the device may be made while retaining the teachings of the invention. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.
Number | Date | Country | Kind |
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92217872 U | Oct 2003 | TW | national |
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3347069 | Hollingshead, Jr. | Oct 1967 | A |
3408839 | Walters | Nov 1968 | A |
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4290286 | Rae | Sep 1981 | A |
4499745 | Ricouard et al. | Feb 1985 | A |
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4671088 | Jeang | Jun 1987 | A |
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6792778 | Chen | Sep 2004 | B1 |
Number | Date | Country | |
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20050072196 A1 | Apr 2005 | US |