Patent ID: 12202111

DETAILED DESCRIPTION

It should be noted herein that for clarity of description, spatially relative terms such as “top,” “bottom,” “upper,” “lower,” “on,” “above,” “over,” “downwardly,” “upwardly” and the like may be used throughout the disclosure while making reference to the features as illustrated in the drawings. The features may be oriented differently (e.g., rotated 90 degrees or at other orientations) and the spatially relative terms used herein may be interpreted accordingly.

Referring toFIGS.2to4, an embodiment of an electric nail gun according to the disclosure includes a frame unit2, a power unit3, a swing arm unit4, an impact unit5, and an actuation unit6.

The power unit3is mounted to the frame unit2, and includes a flywheel31that is rotatably connected to the frame unit2, and a motor subunit32that is used to drive the flywheel31to rotate. Consequently, the flywheel31is actuated by electric power.

The swing arm unit4substantially extends in a nail-striking direction (X), and is pivotably connected to the frame unit2. The swing arm unit4includes a pivot portion41that is pivotably mounted to the frame unit2, a swing portion42that is opposite to the pivot portion41and that is spaced apart from the flywheel31, a support frame43that is connected to the swing portion42and that extends in a first direction (Z), a conversion member44that is disposed on the support frame43and that is spaced apart from the swing portion42in the first direction (Z), and two arm resilient members45that are disposed between the frame unit2and the swing portion42and that are spaced apart from each other in a second direction (Y). In this embodiment, the first direction (Z) is substantially orthogonal to the nail-striking direction (X). The second direction (Y) is substantially orthogonal to the nail-striking direction (X) and the first direction (Z).

The swing portion42is operable to swing relative to the flywheel31in the first direction (Z) between an initial position (seeFIGS.2and4) and a triggered position (seeFIG.5). When the swing portion42is in the initial position, the swing portion42and the flywheel31have a maximum distance (d1) (seeFIG.4) therebetween. When the swing portion42is in the triggered position, the swing portion42and the flywheel31have a minimum distance (d2) (seeFIG.5) therebetween.

In the embodiment, the conversion member44is configured to be a round rod and extends in the second direction (Y).

Each of the arm resilient members45provides a restoring force for the swing portion42to move toward the initial position when the swing portion42swings away from the initial position.

The impact unit5is movably mounted to the swing arm unit4, and includes an impact member51that is movably connected to the swing arm unit4, a nail-striking rod52that is connected to the impact member51and that is adapted for striking a nail, and a retrieving subunit53.

The impact member51is operable to be moved by the swing arm unit4to come into contact with the flywheel31. When the impact member51is in contact with the flywheel31, the impact member51is urged by rotation of the flywheel31to move from a ready position (seeFIGS.2and4) to a nail-striking position (seeFIG.6) in the nail-striking direction (X). When the impact member51is in the ready position, the impact member51is distal from the pivot portion41of the swing arm unit4, and is proximate to the swing portion42. When the impact member51is in the nail-striking position, the impact member51is distal from the swing portion42, and is proximate to the pivot portion41(not shown).

In this embodiment, the retrieving subunit53is a combination of resilient components, and provides a restoring force for the impact member51to move toward the ready position when the impact member51is in the nail-striking position.

Referring toFIGS.3to5, the actuation unit6includes a casing seat that is connected to the frame unit2, a pushing member61that is rotatably mounted to the casing seat60, an actuation member62that is mounted to the frame unit2, and an actuation resilient subunit63that is disposed between the frame unit2and the pushing member61.

The pushing member61is rotatable relative to the frame unit2, and has a pushing surface611that faces the conversion member44, and a rod-facing surface612that cooperates with the pushing surface611to define an included angle therebetween. The pushing surface611is a curved surface that is convex toward the conversion member44, and has a peak section613, and two tail sections614that are respectively located at two opposite sides of the peak section613and that extend away from the conversion member44.

It should be noted that each of the pushing surface611and the rod-facing surface612may not be limited to be a flat surface or a curved surface as shown in FIGS. In one embodiment, each of the pushing surface611and the rod-facing surface612may be an irregular surface as a surface of a cam.

The actuation member62has an end surface621that faces the swing arm unit4, and a pushing rod622that is movable in the first direction (Z). The rod-facing surface612of the pushing member61faces the pushing rod622, and is in contact with an end of the pushing rod622. The pushing rod622is operable to move relative to the pushing member61in the first direction (Z) between an extended position (seeFIG.5) and a retracted position (seeFIG.4). When the pushing rod622is in the extended position, the end of the pushing rod622is located above the end surface621, and is distal from the end surface621. When the pushing rod622is in the retracted position, the end of the pushing rod622is lowered such that the end of the pushing rod622is proximate to the end surface621. During movement of the pushing rod622from the retracted position to the extended position in the first direction (Z), the pushing rod622pushes the rod-facing surface612of the pushing member61upwardly away from the end surface621such that the pushing member61rotates relative to the frame unit2in a first rotating direction, and pushes the conversion member44via the peak section613of the pushing surface611thereof to urge the swing arm unit4to move from the initial position to the triggered position. Consequently, when the pushing rod622is in the extended position, the rod-facing surface612is distal from the end surface621, the conversion member44is pushed by the peak section613of the pushing surface611, and the swing arm unit4is in the triggered position. During movement of the pushing rod622from the extended position to the retracted position, the pushing rod622moves downwardly such that the pushing member61rotates in a second rotating direction opposite to the first rotating direction, that the conversion member44is free from a pushing force of the pushing member61, and that the rod-facing surface612of the pushing member61gets closer to the end surface621. Consequently, when the pushing rod622is in the retracted position, the rod-facing surface612is proximate to the end surface621, the conversion member44is proximate to one of the tail sections614of the pushing surface611that is proximate to the rod-facing surface612(i.e., the upper one of the tail sections614) and is distal from the other one of the tail sections614that is distal from the rod-facing surface612(i.e., the lower one of the tail sections614), and the swing arm unit4is in the initial position.

In this embodiment, the actuation member62is configured to be a solenoid valve. The pushing rod622is urged to be in the extended position by magnetic force when the actuation member62is energized. The pushing rod622is in the retracted position when the actuation member62is powered off.

Referring toFIG.6, it is noted that, because the pushing member61is rotatably mounted to the casing seat60and the casing seat60is connected to the frame unit2, the actuation unit6defines a pivot point (A) at a joint of the pushing member61and the casing seat60. The pushing member61is rotatable about the pivot point (A) relative to the frame unit2. The pushing rod622is operable to push the rod-facing surface612such that the rod-facing surface612rotates about the pivot point (A). Because the rod-facing surface612is in contact with the pushing rod622, the rod-facing surface612cooperates with the pushing rod622to define an effort point (B) at which the rod-facing surface612and the pushing rod622are in contact with each other. When the pushing member61pushes the conversion member44via the pushing surface611thereof, the pushing surface611cooperates with the conversion member44to define a resistance point (C) at which the pushing surface611and the conversion member44are in contact with each other. The resistance point (C) is located between the pivot point (A) and the effort point (B) in the nail-striking direction (X). A distance (D1) between the effort point (B) and the pivot point (A) in the nail-striking direction (X) is greater than a distance (D2) between the resistance point (C) and the pivot point (A) in the nail-striking direction (X). As such, by virtue of the rod-facing surface612and the pushing surface611cooperatively defining the included angle therebetween, and by virtue of the distance (D1) being greater than the distance (D2), a pushing force of the pushing rod622that acts toward the pushing member61may result in the pushing force of the pushing member61that acts toward the conversion member44being greater than the pushing force of the pushing rod622, and the size of the embodiment may be reduced.

The actuation resilient subunit63resiliently biases the pushing member61so that the pushing member61is urged to move toward the pushing rod622when being free from an external force. Specifically, the actuation resilient subunit63includes a rotating arm631that is rotatably connected to the casing seat60, and an actuation resilient member632that resiliently biases the casing seat60and an end of the rotating arm631so that another end of the rotation arm631pushes the pushing member61to urge the pushing member61to push the pushing rod622toward the retracted position.

Referring toFIG.5again, when the actuation member62is not energized, the arm resilient members45resiliently bias the swing portion42such that the swing portions42is in the initial position, and the retrieving subunit53resiliently biases the impact member51such that the impact member51is in the ready position. Because the impact member51is connected to the swing arm unit4, the maximum distance (d1) between the swing portion42and the flywheel31keeps the impact member51away from the flywheel31(i.e., the impact member51is spaced apart from the flywheel31). At this time, the actuation resilient subunit63resiliently biases the pushing member61such that the pushing member61is urged by the actuation resilient subunit63to rotate in the second rotating direction and to keep the pushing rod622in the retracted position. The rod-facing surface612is proximate to the end surface621, and the conversion member44is proximate to the upper one of the tail sections614.

Referring toFIGS.5and6again, when the flywheel31is driven by the motor subunit32to rotate in the second rotating direction at a predetermined rotational speed, the pushing rod622may be urged to move toward the extended position in the first direction by the magnetic force once the actuation member62has been energized. At this time, the pushing rod622urges the pushing member61to rotate in the first rotating direction such that the rod-facing surface612is moved away from the end surface621, and that the peak section613of the pushing surface611pushes the conversion member44. When the peak section613pushes the conversion member44, the swing portion42presses the arm resilient members45and swings toward the triggered position such that the swing portion42gets closer to the flywheel31, and that the impact member51connected to the swing arm unit4is urged to move toward the flywheel31. Afterwards, when the impact member51is in contact with the flywheel31, the impact member51is urged by the rotation of the flywheel31to move from the ready position to the nail-striking position (toward the pivot portion41) in the nail-striking direction (X) such that the nail-striking rod52strikes the nail.

After the nail-striking rod52strikes the nail, the actuation member62is de-energized. At this time, the pushing member61is resiliently biased by the actuation resilient subunit63such that the pushing member61rotates in the second rotating direction and pushes the pushing rod622to return to the retracted position. When the pushing rod622is in the retracted position (i.e., the rod-facing surface612is proximate to the end surface621of the actuation member62, and the conversion member44is proximate to the upper one of the tail sections614of the pushing surface611), the conversion member44is free from the pushing force of the pushing member61such that the swing portion42is resiliently biased by the arm resilient members45, and swings away from the flywheel31and back to the initial position in the first direction (Z). At this time, the impact member51is resiliently biased by the retrieving subunit53such that the impact member51moves from the nail-striking position to the ready position (toward the swing portion42).

In summary, the embodiment of the electric nail gun offers several benefits as follows. By virtue of the pushing rod622being movable in the first direction (Z) and operable to push the pushing member61in the first direction (Z), and by virtue of rotation of the pushing member61resulting in the pushing force of the pushing member61acting toward the conversion member44, the swing arm unit4may swing in a direction parallel to a direction of the pushing force of the pushing rod622that acts toward the pushing member61(i.e., the swing direction (Z)), which may reduce a length of the electric nail gun in the nail-striking direction (X). In addition, the size of the electric nail gun may thus be reduced, which saves space.

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(s). 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; such does not mean that every one of these features needs to be practiced with the presence of all the other features. In other words, in any described embodiment, when implementation of one or more features or specific details does not affect implementation of another one or more features or specific details, said one or more features may be singled out and practiced alone without said another one or more features or specific details. It should be further noted 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(are) considered the exemplary embodiment(s), it is understood that this disclosure is not limited to the disclosed embodiment(s) 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.