This application claims priority of Taiwanese Patent Application No. 108114016, filed on Apr. 22, 2019.
The disclosure relates to a hand held clamp tool, more particularly, to a pair of universal pliers.
Referring to
The object of the disclosure is to provide a pair of universal pliers of a newly devised structure that is more convenient to use.
According to the disclosure, the universal pliers comprise a fixed structure, a movable structure, and a quick release mechanism.
The fixed structure extends in a front-rear direction, and includes a fixed jaw plate and a fixed handle plate that extends rearward from the fixed jaw plate. The fixed jaw plate has a fixed clamping portion. The movable structure is movably connected to the fixed structure, and includes a movable jaw plate, a front movable handle plate, and a rear movable handle plate.
The movable jaw plate has a movable clamping portion opposite to the fixed clamping portion and forming a clamping hole that is in conjunction with the fixed clamping portion. The front movable handle plate is pivotally coupled to and extends rearward from the movable jaw plate. The front movable handle plate has a first guide slot at a rear end thereof. The first guide slot defines a locked segment and a releasing segment at opposite ends thereof, and an intermediate segment between the locked segment and the releasing segment. The rear movable handle plate has a pivoting end pivotally coupled to the front movable handle plate, a grip end opposite to and disposed at a rear side of the pivoting end, and a second guide slot located between the pivoting end and the grip end. The movable structure is movable relative to the fixed structure between a retaining position where the movable clamping portion is adjacent to the fixed clamping portion, and a releasing position where the movable clamping portion is spaced far from the fixed clamping portion.
The quick release mechanism includes a trigger and a resilient locking subunit. The trigger is pivotally coupled to and accessibly protrudes from the front movable handle plate. The resilient locking subunit is operatively connected to the trigger and the movable structure, and includes a movable pin, a pulling member, and a resilient member. The movable pin is inserted through and is slidable along the first guide slot and the second guide slot. The pulling member is connected between the movable pin and the trigger, such that the pivot action of the trigger drives the resilient locking subunit to switch between a locked state where the movable pin is located at the locked segment of the first guide slot and where the rear movable handle plate is not permitted to pivot relative to the front movable handle plate, and a non-locked state where the movable pin is located at the intermediate segment of the first guide slot and where the rear movable handle plate is permitted to pivot relative to the front movable handle. The resilient member is connected between the movable pin and the rear movable handle plate to resiliently bias the resilient locking subunit towards the locked state.
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 present invention 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.
As shown in
The fixed structure 2 shown in the illustrations extends in a front-rear direction (Y) and includes a fixed jaw plate 21 with a fixed clamping portion 211, a fixed handle plate 22 extending rearward from the fixed jaw plate 21, and an adjusting screw 23 disposed at a rear end of the fixed handle plate 22. In this embodiment, the adjusting screw 23 is a bolt rotatably screwed onto the fixed handle plate 22.
The movable structure 3 is movably connected to the fixed structure 2 and includes a movable jaw plate 31, a front movable handle plate 32 pivotally coupled to and extending rearward from the movable jaw plate 31, and a rear movable handle plate 33 pivotally coupled to and extending rearward from the front movable handle plate 32. The movable jaw plate 31 has a movable clamping portion 311 opposed to the fixed clamping portion 211 and forms a clamping hole 200 in conjunction with the fixed clamping portion 211 in closing. The movable jaw plate 32 has a first guide slot 321 at a rear end thereof, a jaw pivot hole 322 at a front end thereof for extension of a securing pin to pivotally couple the movable jaw plate 31 and the front movable handle plate 32, a front handle pivot hole 323 located in front of the first guide slot 321, a connecting hole 324 located in front of the front handle pivot hole 323, and a rod pivot hole 325 located between the jaw pivot hole 322 and the connecting hole 324. It is to be particularly noted that, the front movable handle plate 32 is formed by a piece of sheet metal bent to form a channel-shaped cross-section with a base and two parallel side walls 320 spaced apart in a left-right direction (X). It is appreciated that the front movable handle plate 32 may also be formed by other processing methods such as molding, cutting, and the like. It should also be noted that each of all the above-mentioned construction holes or slots actually has two opposite left and right ends being formed respectively in the two side walls 320 in this embodiment.
The first guide slot 321 is a substantially arcuate slot defining an end configured to be a locked segment 326, an opposite end configured to be a releasing segment 327, and an angled portion intermediate between the locked segment 326 and the releasing segment 327 configured to be an intermediate segment 328. The releasing segment 327 is in front of the locked segment 326 in the front-rear direction (Y) and higher than the locked segment 326 in a top-bottom direction (Z).
The rear movable handle plate 33 has a pivoting end 331 pivotally coupled to the front movable handle plate 32 and received between the two side walls 320 of the channel-shaped structure of the front movable handle plate 32, an opposite grip end 332 disposed at a rear side of the pivoting end 331, a second guide slot 333 located between the pivoting end 331 and the grip end 332 and registered with the first guide slot 321, and a bar hook 334 integrally formed at the grip end 332. The pivoting end 331 is formed with a rear handle pivot hole 335 registered with the front handle pivot hole 323 of the front movable handle plate 32, so that the rear movable handle plate 33 is capable of pivot relative to the front movable handle plate 32 about the pivot pin 329 extending through the front handle pivot hole 323 and the rear handle pivot hole 335. The second guide slot 333 has a first end segment 336 and an opposite second end segment 337, and the second end segment 337 is in front of the first end segment 336 in the front-rear direction (Y). The rear movable handle plate 33 is formed by a piece of sheet metal bent to form a channel shape. Similar to the description of the front movable handle plate 32, the second guiding slot 333 of the rear movable handle plate 33 actually has two opposite left and right ends being formed respectively in the side walls 320 in this embodiment.
The linkage mechanism 4 is operatively disposed with respect to the fixed structure 2 and the movable structure 3, and includes a linkage bar 41 and a tension spring 42. The front end of the linkage bar 41 is pivotally coupled to the front movable handle plate 32 with a securing pin extending through the rod pivot hole 325 of the front movable handle plate 32 and the front end of the linkage bar 41. The linkage bar 41 has a rear end engaging a front end surface of the adjusting screw 23, and a stop edge 411 on the lower side for abutting against the rear movable handle plate 33. The tension spring 42 is connected between the movable jaw plate 31 and the fixed handle plate 22.
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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 subunit 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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108114016 | Apr 2019 | TW | national |
Number | Name | Date | Kind |
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2532659 | Burns | Dec 1950 | A |
2669145 | Mead | Feb 1954 | A |
3996822 | Battista | Dec 1976 | A |
5233893 | Schmidt | Aug 1993 | A |
6708587 | Noniewicz | Mar 2004 | B1 |
20160361799 | Levinson | Dec 2016 | A1 |
Number | Date | Country |
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WO 2016201100 | Dec 2016 | WO |
Entry |
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Search Report appended to an Office Action, which was issued to Chinese counterpart application No. 202010122797.8 by the CNIPA dated Jun. 22, 2021, with an English translation thereof. |
Number | Date | Country | |
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20200331123 A1 | Oct 2020 | US |