Adjustable bowstring release device
View Patent ↗A bowstring release mechanism includes first and second jaws pivotally connected to a housing with a trigger section operably associated with the jaws for moving the jaws between open and closed positions. The jaws include opposing faces that are in a juxtaposed relationship when the release mechanism is in a closed position. Due to deviations in manufacturing tolerances and wear, a gap between the jaw faces may vary in size. To that end, an adjustment portion is operably associated with the trigger and jaws for precisely adjusting the size of the gap. A second adjustment portion for adjusting the sensitivity of the trigger section is also provided.
1. A bowstring release mechanism comprising:
a housing;
a first jaw operatively associated with the housing, the first jaw having a first face;
a second jaw operatively associated with the housing, the second jaw having a second face disposed in juxtaposition with the first face;
at least one of the jaws being movable with respect to the other of the jaws between closed and open positions for respectively retaining and releasing a bowstring;
a trigger section operatively associated with the housing and the at least one jaw for moving the at least one jaw between the closed and open positions; and
an adjustment portion operatively associated with one of the jaws for adjusting a gap between the first and second faces;
wherein the adjustment portion forms part of the trigger section;
wherein the adjustment portion comprises:
a bifurcated body formed at one end of the trigger section, the bifurcated body including a first leg and a second leg separated by a slot that extends into the body from a top surface thereof, the first leg being pivotally connected to the at least one jaw; and an adjustment member adapted for movement toward and away from the slot to thereby vary a width of the slot and cause movement of the at least one jaw to thereby vary the gap between the first and second faces.
2. A bowstring release mechanism according to claim 1 , wherein the adjustment portion further comprises:
a threaded opening formed in the bifurcated body; and
the adjustment member having a threaded section for engaging the threaded opening, and a wedge section for engaging the slot;
wherein rotation of the adjustment member with respect to the threaded opening in one direction causes the wedge section to move toward the slot to thereby widen the slot and narrow the gap between the first and second faces, and rotation of the adjustment member in an opposite direction causes the wedge section to move away from the slot to thereby narrow the slot and widen the gap between the first and second faces.
3. A bowstring release device according to claim 2 , wherein the wedge section is frustoconical in shape.
4. A bowstring release device according to claim 2 , wherein the wedge section is semi-spherical in shape.
5. A bowstring release device according to claim 2 , and further comprising a depression in the adjustment member for receiving a tool to thereby rotate the adjustment member toward and away from the slot.
6. A bowstring release device according to claim 2 , wherein the slot terminates in the bifurcated body at an aperture that is wider in dimension than the slot, at least a portion of the wedge section being located in the aperture.
7. A bowstring release device according to claim 2 , wherein the first and second jaws are pivotally connected to the housing.
8. A bowstring release device according to claim 7 , wherein the first leg is pivotally connected to first jaw, and the second leg is pivotally connected to housing.
9. A bowstring release device according to claim 8 , wherein the trigger section comprises a channel with a first sear surface extending along the channel, a second sear surface extending traverse to the first sear surface, and a sear edge located between the first and second sear surfaces, and further comprising a sear roller located in the channel and pivotally connected to the second jaw, the sear roller being movable along the sear surfaces and the sear edge as the jaws move between the closed and open positions.
10. A bowstring release device according to claim 9 , and further comprising a second adjustment member for adjusting a pull sensitivity of the trigger section, the second adjustment member being movable toward and away from the sear roller in the channel to thereby change a position of the sear roller with respect to the first sear surface when the release mechanism is in the closed position.
11. A bowstring release device according to claim 7 , and further comprising a link arm having first and second ends, the first end being pivotally connected to the first leg, and the second end being pivotally connected to the first jaw, with the second leg is pivotally connected to second jaw, such that movement of the trigger section in one direction causes the first and second jaws to separate and movement of the trigger section in an opposite direction causes the jaws to move towards each other.
12. A bowstring release device according to claim 11 , and further comprising a second adjustment member for adjusting a pull sensitivity of the trigger section, the second adjustment member being movable toward and away from the second end of the link arm to thereby change a position of the link arm with respect to the trigger section when the release mechanism is in the closed position.
13. A bowstring release device according to claim 1 , and further comprising a connecting section located rearwardly of the trigger section for connecting the bowstring release device to a wrist strap.
14. A bowstring release assembly comprising the bowstring release mechanism of claim 1 , and further comprising:
an adjustable wrist strap for fitting around a wrist of a user; and
an extension member having a first end pivotally connected to the adjustable wrist strap and a second end connected to the bowstring release mechanism.
15. A bowstring release device according to claim 1 , and further comprising a second adjustment member for adjusting a pull sensitivity of the trigger section, the second adjustment member being movable with respect to the trigger section to thereby vary an angular position of the trigger section with respect to the housing when the release mechanism is in the closed position.
16. A bowstring release device according to claim 1 , wherein the adjustment portion forms part of one of the first and second jaws.
17. A bowstring release device according to claim 16 , wherein the adjustment portion comprises a slot extending into a body of the one jaw and a fastener operably associated with the slot for increasing and decreasing a width of the slot to thereby decrease and increase, respectively, the gap between the first and second faces.
18. A bowstring release device according to claim 17 , wherein the fastener comprises a threaded fastener, and further wherein the one jaw comprises a first adjustment portion and a second adjustment portion separated by the slot, with the fastener extending through the first adjustment portion and engaging a threaded opening in the second adjustment portion such that rotation of the fastener in one direction causes widening of the gap between the faces and rotation of the fastener in the opposite direction causes narrowing of the gap.
19. A bowstring release mechanism comprising:
a housing;
a first jaw pivotally connected to the housing, the first jaw having a first face;
a second jaw pivotally connected to the housing, the second jaw having a second face disposed in juxtaposition with the first face;
at least one of the jaws being movable with respect to the other of the jaws between closed and open positions for respectively retaining and releasing a bowstring;
a trigger section having an adjustment portion located in the housing and a lever portion extending out of the housing for manipulation by a user, the adjustment portion being pivotally connected to the first jaw for adjusting a gap between the first and second faces; wherein the adjustment portion comprises:
a bifurcated body formed in the trigger section, the bifurcated body including a first leg and a second leg separated by a slot that extends into the body, the first leg being pivotally connected to the first jaw and the second leg being connected to one of a link arm and a sear roller; and an adjustment member adapted for movement toward and away from the slot to thereby vary a width of the slot and cause movement of the first and second jaws to thereby vary the gap between the first and second faces.
20. A bowstring release mechanism according to claim 19 , wherein the adjustment portion further comprises:
a threaded opening formed in the bifurcated body; and
the adjustment member having a threaded section for engaging the threaded opening, and a wedge section for engaging the slot;
wherein rotation of the adjustment member with respect to the threaded opening in one direction causes the wedge section to move toward the slot to thereby widen the slot and narrow the gap between the first and second faces, and rotation of the adjustment member in an opposite direction causes the wedge section to move away from the slot to thereby narrow the slot and widen the gap between the first and second faces.