Handheld punching device
OwnerChung-Yi Leeinventor
Life of this patent
Estimating the term…
Abstract
A handheld punching device includes an operating grip pivotably connected to a holding grip to have a loading end turned in an up-down direction, a transmitting lever pivotably connected to the loading end to transmit a torque to turn a driving end, a punching seat pivotably connected to the holding grip and defining a cutting space for receiving a workpiece to be punched, and a plurality of punch units disposed between the driving end and the punching seat and each having a punch head movably and fittingly disposed in the punching seat along a straight path in the up-down direction, and a press head in abutting engagement with the driving end to be moved by the torque and to drive movement of the punch head through the cutting space for creating a hole in the workpiece.
Claims8
A handheld punching device comprising:
- a holding grip including a hollow housing portion and a gripping portion which extends rearwardly from said housing portion;
- an operating grip including a grip fulcrum portion which is pivotably connected to said housing portion, a forcing end which is disposed rearwardly of said grip fulcrum portion and below said gripping portion, and a loading end which is disposed forwardly of said grip fulcrum portion to be turned about said grip fulcrum portion in an up-down direction when said forcing end is moved relative to said gripping portion;
- a transmitting lever disposed forwardly of said operating grip, and including a transmitting fulcrum portion which is pivotably connected to said housing portion, a transmitting end which is disposed rearwardly of said transmitting fulcrum portion and which is linked to and turnable with said loading end to receive a torque as a result of turn of said loading end, and a driving end which is disposed forwardly of said transmitting fulcrum portion to be turned about said transmitting fulcrum portion by means of the torque in the same direction as the movement of said forcing end;
- a punching seat pivotably connected to said housing portion adjacent to said driving end to be turnable in a left-right direction, said punching seat including an upper die and a lower holder which are spaced apart from each other in the up-down direction to define a cutting space for receiving a workpiece to be punched, said upper die having a plurality of upper penetrating holes which are angularly displaced from each other and which penetrate in the up-down direction, said lower holder having a plurality of lower penetrating holes which are respectively registered and communicated with said upper penetrating holes in the up-down direction by said cutting space and which are respectively dimensioned substantially the same as said upper penetrating holes;
- and
- a plurality of punch units, each of said punch units including a punch head which is movably and fittingly disposed in a respective one of said lower penetrating holes in the up-down direction and which has at an upper end a blade edge facing said cutting space, a press head which has an upper wall that is connected to a lower end of said punch head and that is disposed downwardly of said lower holder for abutting engagement with said driving end in the up-down direction such that said punch head is movable along said corresponding lower penetrating hole to said registered upper penetrating hole during the turning of said driving end to move said blade edge through said cutting space, and a biasing member which is disposed between said lower holder and said press head to bias said punch head downwardly,
- said press head of each of said punch units having a lower wall which is spaced apart from said upper wall in the up-down direction by a receiving gap that opens in the left-right direction such that said driving end is receivable in said receiving gap by getting access thereto when a selected one of said punch units is registered with said driving end.
Dependencies are inferred from the claim text.