Lock assembly capable of counting the number of times of unlocking operation
First Claim
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1. A lock assembly comprising:
- a housing having an accommodation chamber, a first top hole in communication with said accommodation chamber, and a second top hole in communication with said accommodation chamber;
a shackle having a pivotal portion, which passes through said first top hole into said accommodation chamber and is axially moveable and pivotable relative to said housing, and a hook portion integrally connected with said pivotal portion and provided with a free end insertable into said second top hole by means of the axial movement of said pivotal portion, at least one of said pivotal portion and said free end of said hook portion having an insertion groove;
at least one latch movably disposed in said accommodation chamber of said housing and engagable with said insertion groove;
a counter disposed in said accommodation chamber of said housing; and
a key controlled lock unit disposed in said accommodation chamber of said housing and having a plug disposed in a plug casing and rotatable between an unlocked position where a first arm, which extends from said plug casing, is located at a first place enabling a disengaging movement of said latch from said insertion groove such that said pivotal portion of said shackle can be axially moved to allow said free end of said hook portion of said shackle to leave said second top hole, and a second arm, which extends from said plug casing, can start said counter, and a locked position where said first arm is located at a second place prohibiting the disengaging movement of said latch from said insertion groove such that said pivotal portion of said shackle cannot be axially moved;
wherein each of said pivotal portion and said free end of said hook portion has one said insertion groove;
wherein said at least one latch comprises two latches respectively engaged with said insertion grooves of said pivotal portion and said free end of said hook portion, and an elastic member having two ends respectively stopped against said latches; and
wherein said first arm of said key controlled lock unit has a block end, which leaves a space defined between said latches such that said latches are movable relative to said housing when said plug is located at said unlocked position, and blocks said space defined between said latches such that said latches are immovable relative to said housing when said plug is located at said locked position.
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Abstract
A lock assembly includes a housing, a shackle having a pivotal portion, which is disposed in the housing and axially moveable and pivotable, and a free end insertable into a top hole of the housing, and a latch movably disposed in the housing and engagable with the pivotal portion or the free end of the shackle. A key controlled lock unit is disposed in the housing and has a plug rotatable between an unlocked position where the latch can be disengaged from the shackle by a first arm, and a counter can be started by a second arm, and a locked position where the latch is engaged with the shackle.
11 Citations
2 Claims
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1. A lock assembly comprising:
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a housing having an accommodation chamber, a first top hole in communication with said accommodation chamber, and a second top hole in communication with said accommodation chamber; a shackle having a pivotal portion, which passes through said first top hole into said accommodation chamber and is axially moveable and pivotable relative to said housing, and a hook portion integrally connected with said pivotal portion and provided with a free end insertable into said second top hole by means of the axial movement of said pivotal portion, at least one of said pivotal portion and said free end of said hook portion having an insertion groove; at least one latch movably disposed in said accommodation chamber of said housing and engagable with said insertion groove; a counter disposed in said accommodation chamber of said housing; and a key controlled lock unit disposed in said accommodation chamber of said housing and having a plug disposed in a plug casing and rotatable between an unlocked position where a first arm, which extends from said plug casing, is located at a first place enabling a disengaging movement of said latch from said insertion groove such that said pivotal portion of said shackle can be axially moved to allow said free end of said hook portion of said shackle to leave said second top hole, and a second arm, which extends from said plug casing, can start said counter, and a locked position where said first arm is located at a second place prohibiting the disengaging movement of said latch from said insertion groove such that said pivotal portion of said shackle cannot be axially moved; wherein each of said pivotal portion and said free end of said hook portion has one said insertion groove; wherein said at least one latch comprises two latches respectively engaged with said insertion grooves of said pivotal portion and said free end of said hook portion, and an elastic member having two ends respectively stopped against said latches; and wherein said first arm of said key controlled lock unit has a block end, which leaves a space defined between said latches such that said latches are movable relative to said housing when said plug is located at said unlocked position, and blocks said space defined between said latches such that said latches are immovable relative to said housing when said plug is located at said locked position.
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2. A lock assembly comprising:
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a housing having an accommodation chamber, a first top hole in communication with said accommodation chamber, and a second top hole in communication with said accommodation chamber; a shackle having a pivotal portion, which passes through said first top hole into said accommodation chamber and is axially moveable and pivotable relative to said housing, and a hook portion integrally connected with said pivotal portion and provided with a free end insertable into said second top hole by means of the axial movement of said pivotal portion, at least one of said pivotal portion and said free end of said hook portion having an insertion groove; at least one latch movably disposed in said accommodation chamber of said housing and engagable with said insertion groove; a counter disposed in said accommodation chamber of said housing; and a key controlled lock unit disposed in said accommodation chamber of said housing and having a plug disposed in a plug casing and rotatable between an unlocked position where a first arm, which extends from said plug casing, is located at a first place enabling a disengaging movement of said latch from said insertion groove such that said pivotal portion of said shackle can be axially moved to allow said free end of said hook portion of said shackle to leave said second top hole, and a second arm, which extends from said plug casing, can actuate said counter, and a locked position where said first arm is located at a second place prohibiting the disengaging movement of said latch from said insertion groove such that said pivotal portion of said shackle cannot be axially moved; wherein said key controlled lock unit further comprises a first elastic strip mounted on said plug casing, a second elastic strip mounted on said plug casing, and a driving member connected with said plug and provided with a first driving portion, which leaves said first arm to enable said first arm to be forced by said first elastic strip to move to the first place when said plug is located at said unlocked position, and pushes said first arm to move to the second place when said plug is located at said locked position, and a second driving portion, which leaves said second arm to enable said second arm to be forced by said second elastic strip to release a switch of said counter when said plug is located at said unlocked position, and pushes said second arm to press said switch of said counter when said plug is located at said locked position.
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Specification