This application claims priority of Taiwanese Invention Patent Application No. 108131703, filed on Sep. 3, 2019.
The disclosure relates to a door lock, and more particularly to an automatic door lock.
A conventional door lock is mounted to a door leaf. For locking the door leaf, the conventional door lock needs to be operated manually after the door leaf is closed. Such operation may be inconvenient.
Therefore, an object of the disclosure is to provide a door lock that can alleviate the drawback of the prior art.
According to the disclosure, the door lock is adapted to be disposed on a door leaf. The door leaf is pivotally connected to a door frame. The door lock includes an outer casing, a bolt unit, a latch unit, an auxiliary latch unit and a transmission unit. The outer casing defines a retaining space therein, and includes a front plate, and a rear plate that is spaced apart from the front plate in a front-rear direction. The bolt unit is disposed in the outer casing, and includes a bolt member that is movable in the front-rear direction and that is operable to project out of the outer casing, a bolt connecting member that extends rearwardly from the bolt member, and a bolt resilient member that resiliently biases the bolt member to project out of the outer casing. The latch unit is disposed in the outer casing, and includes a latch member that is movable in the front-rear direction and that is operable to project out of the outer casing, a latch connecting member that extends rearwardly from the latch member, and a latch resilient member that is disposed on the latch connecting member and that resiliently biases the latch member to project out of the outer casing. The latch connecting member has a limiting portion at a rear end thereof. The auxiliary latch unit is disposed in the outer casing for abutting against the door frame, and includes an auxiliary latch member that is movable in the front-rear direction and that is operable to project out of the outer casing, a push seat that extends rearwardly from the auxiliary latch member, and an auxiliary latch resilient member that resiliently biases the auxiliary latch member to project out of the outer casing. The transmission unit is disposed in the outer casing, and includes a transmission plate that is movable in the front-rear direction, a plate resilient member that resiliently biases the transmission plate to move rearwardly, a lever member that is pivotally connected to the transmission plate, a lever resilient member that resiliently pushes the lever member, and a holding member that is pivotally connected to the outer casing. The lever member has a front arm portion that extends forwardly and that is for being pushed by the push seat, and a rear arm portion that extends rearwardly. The lever resilient member resiliently pushes the rear arm portion upwardly. The holding member has a hook portion. The door lock is operable to switch between an open state and a lock state. When the door lock is in the open state, the latch member and the auxiliary latch member project out of the outer casing, and the bolt member is retained in the outer casing by the hook portion of the holding member. When the door lock is in the lock state, the bolt member and the latch member project out of the outer casing, and the auxiliary latch member abuts against the door frame and is substantially retracted into the outer casing. During switching operation of the door lock from the open state to the lock state along with the closing operation of the door leaf, the latch member is pushed by the door frame to retract into the outer casing against the biasing action of the latch resilient member after the latch member comes into contact with the door frame so as to move the limiting portion of the latch connecting member past the rear arm portion of the lever member, and the auxiliary latch member is pushed by the door frame 200 to retract into the outer casing against the biasing action of the auxiliary latch resilient member to separate the push seat from the front arm portion of the lever member, so that the rear arm portion is moved onto the path of movement of the limiting portion of the latch connecting member by the lever resilient member. When the latch member is biased by the latch resilient member to project out of the outer casing again in order to engage the door frame after the door leaf is closed, the limiting portion of the latch connecting member pushes and moves the rear arm portion of the lever member to move the transmission plate forwardly against the biasing action of the plate resilient member, so that the holding member pivots downwardly and the hook portion of the holding member releases the bolt member and the bolt connecting member, thereby permitting the bolt member to be biased by the bolt resilient member to project out of the outer casing in order to engage the door frame.
Other features and advantages of the disclosure will become apparent in the following detailed description of the embodiment with reference to the accompanying drawings, of which:
Before the disclosure is described in greater detail, it should be noted that where considered appropriate, reference numerals or terminal portions of reference numerals have been repeated among the figures to indicate corresponding or analogous elements, which may optionally have similar characteristics.
Referring to
Referring to
The bolt unit 2 is disposed in the outer casing 1, and includes a bolt member 21 that is movable in the front-rear direction (X) and that is operable to project out of the outer casing 1 through one of the through grooves 122, a bolt connecting member 22 that extends rearwardly from the bolt member 21, amounting rod 23 that is fixedly connected to the outer casing 1 and that permits the bolt connecting member 22 to be slidably sleeved thereon, and a bolt resilient member 24 that is sleeved on the mounting rod 23 and that resiliently biases the bolt member 21 (via the bolt connecting member 22) to project out of the outer casing 1. In one embodiment, the bolt resilient member 24 is a compression spring.
The latch unit 3 is disposed in the outer casing 1, and is located below the bolt unit 2 in a top-bottom direction (Z). The latch unit 3 includes a latch member 31 that is movable in the front-rear direction (X) and that is operable to project out of the outer casing 1 through another one of the through grooves 122, a latch connecting member 32 that is co-movably connected to the latch member 31 and that extends rearwardly from the latch member 31, and a latch resilient member 33 that is sleeved on the latch connecting member 32 and that resiliently biases the latch member 31 to project out of the outer casing 1. The latch connecting member 32 has a rectangular limiting portion 321 at a rear end thereof. In one embodiment, the latch resilient member 33 is a compression spring.
The auxiliary latch unit 4 is disposed in the outer casing 1, and is for abutting against the door frame 200. The auxiliary latch unit 4 is located below the latch unit 3, and includes an auxiliary latch member 41 that is movable in the front-rear direction (X) and that is operable to project out of the outer casing 1 through still another one of the through grooves 122, a push seat 42 that extends rearwardly from the auxiliary latch member 41, a mounting seat 43 that is fixedly connected to the outer casing 1 and that permits the push seat 42 to be slidably disposed thereon, and an auxiliary latch resilient member 44 that resiliently biases the auxiliary latch member 41 (via the push seat 42) to project out of the outer casing 1. The push seat 42 has a push protrusion 421 (see
In this embodiment, the mounting seat 43 is configured as a rod on which the push seat 42 is mounted. In a modification, the mounting seat 43 may be configured to have a guide rail or a guide slot that permits the push seat 42 to slidably engage therewith.
The transmission unit 5 is disposed in the outer casing 1, and includes a transmission plate 51 that is movable in the front-rear direction (X), a plate resilient member 52 that resiliently biases the transmission plate 51 to move rearwardly (i.e., away from the front plate 12), a lever member 53 that is pivotally connected to the transmission plate 51, a lever resilient member 54 that resiliently pushes the lever member 53, and a holding member 55 that is pivotally connected to the outer casing 1. The transmission plate 51 has a top protrusion 511 that is in slidable contact with the holding member 55, and a positioning groove 512 that is located below the top protrusion 511 and that is operable to be engaged with a post 14 (see
Referring to
With particular reference to
With particular reference to
Referring to
Referring to
The electric lock unit 6 includes a push arm 61 and a driving module 62. The push arm 61 has a pivot portion 611 that is pivotally connected to the outer casing 1, a first push portion 612 that is opposite to the pivot portion 611 and that is for pushing the bolt connecting member 22, and a second push portion 613 that is located between the pivot portion 611 and the first push portion 612 and that is for pushing the limiting portion 321 of the latch connecting member 32. The bolt connecting member 22 has a protruding block 221 (see
The handle unit 7 includes a handle 71 that is coupled to the inner driving member 622 of the driving module 62 of the electric lock unit 6 and that is operable to drive rotation of the inner driving member 622. When the pin member 623 is moved by the actuator 624 to engage both of the outer driving member 621 and the inner driving member 622, rotation of the inner driving member 622 drives the outer driving member 621 to push and rotate the push arm 61.
The control unit 8 is electrically coupled to the electric lock unit 6, and includes a circuit board 81 that is electrically coupled to the actuator 624 to control the actuator 624, and a battery 82 that is electrically coupled to the circuit board 81 for providing electric power.
Referring to
In one embodiment, the circuit board 81 of the control unit 8 may be signally coupled to a portable device (e.g., a mobile phone) that is operable to emit an open signal. When the circuit board 81 receives the open signal, it controls the actuator 624 to move the pin member 623 to engage both of the outer driving member 621 and the inner driving member 622 for opening the door leaf 100.
Referring to
The lock core unit 9 is disposed in the outer casing 1, and includes lock core 91 that permits the key to be inserted therein and that is rotated by the key, a push member 92 that is co-rotatably mounted to the lock core 91, a bolt push arm 93 that is pivotally connected to the outer casing 1 and that is for pushing the bolt connecting member 22, and a latch push arm 94 that is pivotally connected to the outer casing 1 and that is for pushing the latch connecting member 32. The latch push arm 94 has a center of gravity located below a pivot point thereof and tends to be uprightly-disposed. The latch push arm 94 has an upper arm portion 941 located above the pivot point and a lower arm portion 942 located below the pivot point. The lever member 53 of the transmission unit 5 further has an extending arm portion 535 that extends upwardly from the rear arm portion 533. The bolt connecting member 22 further has a push surface 222 that faces rearwardly, and a support protrusion 223 at the rear end thereof for supporting the lower arm portion 942 of the latch push arm 94. Referring to
Referring to
In summary, the door lock according to the disclosure is automatically locked when the door leaf 100 is closed, and can be unlocked by virtue of the card with a tag containing identification data or the kay.
In a modification, the electric lock unit 6 and the control unit 8 may be omitted. In another modification, the lock core unit 9 may be omitted.
In the description above, for the purposes of explanation, numerous specific details have been set forth in order to provide a thorough understanding of the embodiment. It will be apparent, however, to one skilled in the art, that one or more other embodiments may be practiced without some of these specific details. It should also be appreciated that reference throughout this specification to “one embodiment,” “an embodiment,” an embodiment with an indication of an ordinal number and so forth means that a particular feature, structure, or characteristic may be included in the practice of the disclosure. It should be further appreciated that in the description, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of various inventive aspects, and that one or more features or specific details from one embodiment may be practiced together with one or more features or specific details from another embodiment, where appropriate, in the practice of the disclosure.
While the disclosure has been described in connection with what is considered the exemplary embodiment, it is understood that this disclosure is not limited to the disclosed embodiment but is intended to cover various arrangements included within the spirit and scope of the broadest interpretation so as to encompass all such modifications and equivalent arrangements.
Number | Date | Country | Kind |
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108131703 | Sep 2019 | TW | national |
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Number | Date | Country | |
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20210062544 A1 | Mar 2021 | US |