CN110541903B

CN110541903B - Power-storage torsion spring and nail gun with same

Info

Publication number: CN110541903B
Application number: CN201810519633.1A
Authority: CN
Inventors: 叶胜隆
Original assignee: Pao Shen Enterprises Co Ltd
Current assignee: Pao Shen Enterprises Co Ltd
Priority date: 2018-05-28
Filing date: 2018-05-28
Publication date: 2021-04-20
Anticipated expiration: 2038-05-28
Also published as: CN110541903A

Abstract

A power-accumulating torsion spring and a nail gun with the power-accumulating torsion spring are disclosed, the nail gun comprises a shell seat unit, a nail striking sheet, a power-accumulating unit and a pressing handle unit. The shell seat unit comprises a pivot and a nail striking opening. The power storage unit comprises a power storage torsion spring which is provided with a force receiving arm and a driving arm which penetrates through the nail striking plate and is elastically propped against the force receiving arm, and the driving arm stores the pre-stored potential energy moving towards the bottom side. The pressing handle unit comprises a handle and a fastener detachably embedded in the nail hitting sheet. When the handle rotates from the initial position to the nail hitting position, the handle is abutted against the force receiving arm and moves towards the bottom side, the handle drives the buckling piece to move towards the top side and drives the nail hitting sheet to drive the driving arm to move towards the top side, so that the force storage torsion spring stores potential energy for driving the nail hitting sheet to move towards the bottom side.

Description

Power-storage torsion spring and nail gun with same

Technical Field

The present invention relates to a nail gun, and more particularly, to a power storage torsion spring and a nail gun having the same.

Background

As shown in fig. 1 and 2, a nailing machine 1 disclosed in taiwan patent publication No. 545350 includes a housing 11, a nailing unit 12, and a handle unit 13. The housing 11 has a shaft 111. The nail striking unit 12 has a nail striking plate 121 located in the housing 11 and moving along a top-bottom direction Z, and a plate spring 122 disposed in the housing 11 and having a front end engaged with the nail striking plate 121. The handle unit 13 has a pressing handle 131 rotatably pivoted to the shaft 111, and a spring 132 elastically pressed between the housing 11 and the pressing handle 131 and capable of being compressed to generate an elastic restoring force, the pressing handle 131 has a long guide groove 133 pivotally connected to the shaft 111 and capable of sliding relative to the shaft 111, and a front end of the pressing handle 131 is detachably engaged with the nail striking plate 121.

When the nail hammering device is used, the rear section of the pressing handle 131 is pressed downwards, so that the front end of the pressing handle 131 drives the nail hammering piece 121 to move towards the top side, the plate spring 122 is further linked to deform towards the top side in an arc-shaped manner, the plate spring 122 accumulates potential energy which drives the nail hammering piece 121 to move towards the bottom side, and when the pressing handle 131 continuously rotates until the front end of the pressing handle is separated from the nail hammering piece 121, the nail hammering piece 121 is instantly driven by the plate spring 122 to move downwards to generate nail hammering action.

Although the nailing machine 1 has the above-mentioned effects, since the plate spring 122 is made of a metal plate with a suitable thickness, a user needs to exert a large force to overcome the rigidity of the plate spring 122 and to move the nail striking plate 121 upward for a large distance to allow the plate spring 122 to generate a sufficient amount of arc deformation to accumulate a nail striking potential, which is a laborious operation.

Disclosure of Invention

The invention aims to provide a power storage torsion spring which is suitable for being installed on a nail gun and can save operating force.

The invention relates to a power-storage torsion spring which is suitable for being installed on a nail gun and used for storing the potential energy of striking nails. The spring coil comprises a first end and a second end which are arranged in opposite directions. The stressed arm extends from the first end of the spring coil to the front side, then extends to the bottom side and then extends to the inner side. The driving arm extends from the second end of the spring coil to the front side and exceeds the force receiving arm, and the driving arm elastically abuts against the force receiving arm and enables the driving arm to store pre-stored potential energy moving towards the bottom side.

The force storage torsion spring is provided with a connecting section extending forwards from a first end of the spring coil, a middle section extending towards the bottom side from the connecting section, and a binding section extending towards the driving arm from the middle section, wherein the driving arm is provided with an extending section extending towards the front side from a second end of the spring coil and elastically abutting against the binding section of the force storage arm, and an inserting section extending obliquely towards the front side from the extending section, the force storage torsion spring can be switched between a natural state without being installed on a nail gun and a use state with being installed on the nail gun, when the force storage torsion spring is in the natural state, the extending section of the driving arm is lower than and far away from the binding section of the force storage arm, and when the force storage torsion spring is in the use state, the driving arm elastically abuts against the binding section of the force storage arm.

According to the power storage torsion spring, the middle section of the force receiving arm and the binding section form an angle, and the angle is not larger than 90 degrees.

The power-accumulating torsion spring defines a base line which extends along the front-back direction and passes through the center of the wire diameter of the insertion section, when the power-accumulating torsion spring is in the use state, the spring coil passes through the base line, and when the power-accumulating torsion spring is in the natural state, the spring coil is separated from the base line.

The invention relates to a power-storage torsion spring which is formed by bending a metal wire with the diameter of 3.0mm to 4.5mm into a whole.

According to the power storage torsion spring, the connecting section of the force receiving arm extends outwards along a first extension line tangent to the outer peripheral surface of the spring coil and then extends outwards in an inclined manner, the extension section of the driving arm extends outwards along a second extension line tangent to the outer peripheral surface of the spring coil, an angle is formed between the connecting section of the force receiving arm and the extension section of the driving arm, and the angle is 15-45 degrees.

Another object of the present invention is to provide a nail gun that is less labor intensive to use.

The nail gun of the invention comprises a shell seat unit, a nail striking sheet, a force storage unit and a pressing handle unit. The shell base unit comprises a pivot, a fixed shaft positioned at the rear side of the pivot and a nail striking opening positioned at the front side and formed at the bottom end. The nail hitting sheet is movably arranged in the shell seat unit along the top-bottom direction, and the bottom end of the nail hitting sheet faces the nail hitting opening.

The power storage unit is arranged in the shell seat unit and comprises a power storage torsion spring which is rotatably arranged on the fixed shaft and connected with the nail striking plate, and a reset spring which is elastically propped between the power storage torsion spring and the shell seat unit and can be compressed, the power storage torsion spring is provided with a spring ring which is rotatably sleeved on the fixed shaft, a force receiving arm which extends from the first end of the spring ring to the front side and then extends to the bottom side and then extends to the inner side, and a driving arm which extends from the second end of the spring ring opposite to the first end to the front side and exceeds the force receiving arm, the driving arm is penetrated in the nail striking plate and elastically propped against the force receiving arm, the driving arm is enabled to store the pre-stored potential energy which moves to the bottom side, and the reset spring is elastically propped between the force receiving arm and the shell seat unit.

The pressing handle unit is rotatably pivoted on the shell seat unit and comprises a handle which is rotatably pivoted on the pivot and is pressed against the force storage unit, a buckling piece which is positioned on the inner side of the handle, movably pivoted on the pivot and is detachably embedded and clamped in the nail hitting sheet, and an elastic piece which is elastically pressed between the handle and the buckling piece. The handle can rotate between an initial position and a nail striking position relative to the pivot, when the handle is at the initial position, the buckling piece is embedded in the nail striking sheet, the handle is pressed against the stress arm of the power storage torsion spring and gradually moves towards the bottom side and presses against the reset spring during the rotation of the handle from the initial position to the nail striking position, so that the reset spring accumulates potential energy for pushing the power storage torsion spring to move towards the top side, the handle drives the buckling piece to gradually move towards the top side and the back side and drives the nail striking sheet to drive the driving arm of the power storage torsion spring to gradually move towards the top side, so that the power storage torsion spring accumulates potential energy for driving the nail striking sheet to move towards the bottom side, when the handle is at the nail striking position, the buckling piece is separated from the nail striking sheet, the power storage torsion spring releases the potential energy, so that the driving arm of the power storage torsion spring drives the nail striking sheet to move towards the bottom side to be adjacent to the bottom end of the nail striking sheet When the handle returns from the nail striking position to the initial position, the return spring releases potential energy and pushes the power-storing torsion spring to move towards the top side to link the handle and the buckling piece to rotate, and drives the driving arm of the power-storing torsion spring to link the nail striking piece to move towards the top side to the nail striking piece to be in sliding contact with the buckling piece, so that the buckling piece moves towards the handle to press the elastic piece, and the elastic piece accumulates potential energy for pushing the buckling piece to automatically insert the nail striking piece again.

In the nailing gun of the invention, the stress arm of the power-accumulating torsion spring is provided with a connecting section extending from the first end of the spring coil to the front side, a middle section extending from the connecting section to the bottom side, and a binding section extending from the middle section to the direction of the driving arm, the driving arm of the power-accumulating torsion spring is provided with an extension section which extends from the second end of the spring coil to the front side and is propped against the binding section of the force-receiving arm, and an insertion section which inclines towards the front side from the extension section and is penetrated in the nail striking piece, the power torsion spring can be switched between a natural state of not being installed on the nail gun and a use state of being installed on the nail gun, when the power-accumulating torsion spring is in the natural state, the extension section of the driving arm is lower than and far away from the binding section of the force-receiving arm, when the power storage torsion spring is in the use state, the driving arm is elastically propped against the binding section of the force receiving arm.

According to the nail gun disclosed by the invention, an angle is formed between the middle section of the stressed arm and the binding section, and the angle is smaller than 90 degrees.

The nail gun of the invention defines a baseline which extends along the front-back direction and passes through the center of the wire diameter of the insertion section, when the power-storage torsion spring is in the use state, the spring coil passes through the baseline, and when the power-storage torsion spring is in the natural state, the spring coil is separated from the baseline.

The invention has the beneficial effects that: when the handle rotates from the initial position to the nail striking position, the accumulated potential energy accumulated in advance by the power-accumulating torsion spring is utilized, and the power-accumulating torsion spring can accumulate the potential energy enough to drive the nail striking sheet to generate nail striking only by pressing the handle and linking the nail striking sheet to drive the power-accumulating torsion spring to move a small distance towards the top side, so that the use is labor-saving.

Drawings

Other features and effects of the present invention will become apparent from the following detailed description of the embodiments with reference to the accompanying drawings, in which:

FIG. 1 is a cross-sectional view of a prior art nailer;

FIG. 2 is a sectional view illustrating that a pressing handle of the conventional nailing machine is pressed down;

FIG. 3 is a partially exploded perspective view of a first embodiment of the nail gun of the present invention;

FIG. 4 is a fragmentary perspective view with one of the housings of a housing base unit of the first embodiment omitted to illustrate a handle of a press handle unit in a home position with a fastener of the press handle unit engaged with a slot of a driver blade;

FIG. 5 is a perspective view of the squeeze grip unit and a power storage unit of the first embodiment;

FIG. 6 is a top view illustrating a power torsion spring of the power unit in a use condition;

FIG. 7 is a perspective view of the power torsion spring in a natural state illustrating a driven arm of the power torsion spring away from a stressed arm;

FIG. 8 is a top plan view of the power torsion spring in the natural state;

FIG. 9 is a front elevational view of the power torsion spring in the natural state;

FIG. 10 is a perspective view illustrating the movable arm of the power torsion spring in the natural state being moved toward the top side to be elastically deformed and urged against the force-receiving arm;

FIG. 11 is a view similar to FIG. 4, illustrating the handle pressing against the power torsion spring and driving the latch to interlock the nail striking plate to move toward the top side during the rotation of the handle from the initial position to the nail striking position;

FIG. 12 is a view similar to FIG. 11, illustrating the moment the handle is rotated to the striking position, and the fastener just about to disengage from the slot of the striking plate but not yet;

FIG. 13 is a view similar to FIG. 12, showing the handle rotated to the nailing position, the catch disengaged from the catch of the nail striking plate and the stored torsion spring releasing potential energy and moving the nail striking plate to the bottom end of the nail striking plate adjacent to the nail striking port;

FIG. 14 is a view similar to FIG. 13, illustrating the striking plate sliding against the latch member and causing the latch member to press against a resilient member of the handle unit during the handle returning from the striking position toward the starting position, such that the resilient member accumulates a potential energy that urges the latch member to automatically reinsert the striking plate;

FIG. 15 is a perspective view of a second embodiment of the nail gun of the present invention;

FIG. 16 is a left side view illustrating an adjustment unit of the second embodiment; and

FIG. 17 is a view similar to FIG. 16, illustrating a knob of the adjustment unit being rotatable relative to the housing base unit and adapted to move the latch relative to a pivot.

Detailed Description

< detailed description of the invention >

Before the present invention is described in detail, it should be noted that relative positional terms used in the following description, such as "front-back direction X", "left-right direction Y", and "top-bottom direction Z", are based on the orientation shown in the drawings and the normal use orientation, and similar components are denoted by the same reference numerals.

Referring to fig. 3 and 4, a first embodiment of the nail gun of the present invention includes a housing unit 2, a nail-striking plate 3, a power storage unit 4, and a handle unit 5.

The housing base unit 2 includes two housing bodies 21, a pivot 22 disposed in the housing body 21 along a left-right direction Y, a fixing shaft 23 disposed in the housing body 21 along the left-right direction Y and located at a rear side of the pivot 22, a limit stop 24 disposed in the housing body 21 and lower than the pivot 22, a guide member 25 disposed at a front end of the housing body 21, and a nail striking opening 26 disposed at a bottom end of the housing body 21 and formed at a bottom side of the guide member 25.

The nail striking plate 3 is movably arranged in the shell seat unit 2 along a top-bottom direction Z perpendicular to the left-right direction Y, and the bottom end of the nail striking plate 3 faces the nail striking opening 26. The striking plate 3 includes a main body 31 extending in the top-bottom direction Z and slidably passing through the guide 25, and a sliding connection portion 32 extending from the main body 31 toward the top side and obliquely curving toward the front side, and the main body 31 has a locking groove 311 and a connection groove 312 lower than the locking groove 311.

Referring to fig. 4, 5 and 6, the power accumulating unit 4 is disposed in the housing unit 2 along a front-rear direction X perpendicular to the top-bottom direction Z and the left-right direction Y, and includes a power accumulating torsion spring 41 rotatably disposed on the fixing shaft 23 and connected to the nail striking plate 3, an abutting seat 42 for positioning the power accumulating torsion spring 41, and a return spring 43 capable of being compressed and elastically abutting between the abutting seat 42 and the housing unit 2.

The power-accumulating torsion spring 41 is formed by bending a metal wire with a diameter of 3mm into a whole and is used for accumulating potential energy of a nail striking action, the power-accumulating torsion spring 41 is provided with a spring coil 44, a force receiving arm 45 and a driving arm 46, and the spring coil 44 is rotatably sleeved outside the fixed shaft 23 and is provided with a first end 441 and a second end 442 which are arranged in an opposite direction. The force receiving arm 45 has a connecting section 451 extending from the first end 441 of the coil 44 toward the front side, an intermediate section 452 extending from the connecting section 451 in a bent manner in the top-bottom direction Z toward the bottom side, and a restraining section 453 extending from the intermediate section 452 in a bent manner in the left-right direction Y toward the left side, i.e., toward the driving arm 46. The driving arm 46 exceeds the force receiving arm 45 in the front-rear direction X, and has an extending section 461 extending from the second end 442 of the spring coil 44 to the front side and exceeding the force receiving arm 45 and abutting against a restraining section 453 of the force receiving arm 45, and an inserting section 462 inclined from the extending section 461 to the front side and to the right side and penetrating through the connecting groove 312 of the nail striking plate 3. Preferably, the wire diameter of the metal wire of the power torsion spring 41 is 3.0mm to 4.5mm, so that it has enough working torque to accumulate potential energy enough to generate nail striking, and the diameter of the metal wire is 4.5mm as an upper limit value because the rigidity is too large and it takes much effort to install when the diameter of the metal wire exceeds 4.5 mm.

The abutting seat 42 has a groove 421 formed on the top surface, and a sleeve block 422 formed on the bottom surface and provided for the return spring 43 to be sleeved, the binding section 453 of the force receiving arm 45 is limited in the groove 421, and the return spring 43 is sprung between the force receiving arm 45 and the housing unit 2 through the abutting seat 42.

Referring to FIGS. 6, 7, 8 and 9, it is to be noted that the power torsion spring 41 can be switched between a natural state (shown in FIG. 7) not mounted in the first embodiment and a use state (shown in FIG. 6) mounted in the first embodiment. As shown in fig. 9, when the power torsion spring 41 is in the natural state, the connecting section 451 of the force receiving arm 45 extends along a first extension line L1 tangent to the outer peripheral surface of the coil 44 and bends toward the front side and the top side, and as can be seen from fig. 8, the connecting section 451 of the force receiving arm 45 also extends obliquely toward the left side, and as shown in fig. 9, the extension section 461 of the driving arm 46 extends toward the front side along a second extension line L2 tangent to the outer peripheral surface of the coil 44. Meanwhile, as can be seen from fig. 7, the extending section 461 of the driving arm 46 is lower than and away from the constraining section 453 of the driven arm 45, the middle section 452 of the driven arm 45 and the constraining section 453 form an angle θ 1, the angle θ 1 is not greater than 90 degrees, and returning to fig. 9, the connecting section 451 of the driven arm 45 and the extending section 461 of the driving arm 46 form an angle θ 2, the angle θ 2 is 15 degrees to 45 degrees, in the first embodiment, the angle θ 1 is 90 degrees, and the angle θ 2 is 28 degrees. As shown in fig. 7 and 10, before the power torsion spring 41 is installed in the first embodiment, a jig (not shown) is used to pull the extension section 461 of the driving arm 46 to move toward the top side and press the extension section 461 of the driving arm 46 onto the force receiving arm 45, at this time, the extension section 461 of the driving arm 46 is elastically abutted against the restraining section 453 of the force receiving arm 45, so that the driving arm 46 accumulates a pre-stored potential energy moving toward the bottom side, and then, as shown in fig. 4 and 6, the coil 44 of the power torsion spring 41 is sleeved outside the fixed shaft 23, and the insertion section 462 is inserted into the connecting groove 312 of the nail striking plate 3, so that the power torsion spring 41 is in the use state.

Referring to fig. 6 and 8, a base line BL extending along the front-back direction X and passing through the center of the wire diameter of the insertion section 462 is defined, preferably, the base line BL passes through the coil 44 when the power torsion spring 41 is in the use state, and the coil 44 is separated from the base line BL and located at the left side of the base line BL when the power torsion spring 41 is in the natural state, so that the driving arm 46 can stably abut against the force receiving arm 45 without being accidentally separated from the force receiving arm 45. In a variation of the first embodiment, the restraining section 453 is tilted to the top side to make the angle θ 1 (see fig. 7) smaller than 90 degrees, so that the restraining section 453 can block the extending section 461 of the driving arm 46 from moving to the left side and being accidentally separated from the force receiving arm 45, and also has a limiting function, and in this case, the coil 44 of the power torsion spring 41 in the natural state passes through the base line BL.

Referring to fig. 3, 4 and 5, the pressing handle unit 5 is rotatably pivoted to the housing base unit 2 and located on the top side of the power storage unit 4, and includes a handle 51, a locking member 52 and an elastic member 53.

The handle 51 is rotatably pivoted to the pivot 22 and pressed against the power storage torsion spring 41 of the power storage unit 4, and the handle 51 has a base wall 511, two side walls 512, a sleeve block 513 and a pressing rod 514. The base wall 511 is formed with a sliding slot 510 extending along the front-back direction X, the side walls 512 are opposite at intervals and extend from two side edges of the base wall 511 to the bottom side, the front end of each side wall 512 protrudes out of the base wall 511 and has a pivot hole 515 pivotally connected to the pivot 22, and a protrusion 516 protruding inwards and located behind the pivot hole 515. The abutment block 513 extends from the base wall 511 toward the top side and toward the slide slot 510. The pressing lever 514 is located behind the pivot 22, penetrates the sidewall 512 along the left-right direction Y, and presses against the force-receiving arm 45 of the power-storing torsion spring 41.

The locking member 52 is located inside the handle 51 and partially exposed from the sliding slot 510, the locking member 52 is movably pivoted to the pivot 22 and detachably engaged with the nail striking plate 3, and has a top wall 521, two inner walls 522, and an extruding block 523. The top wall 521 has a slot 520 and a clamping end 524 formed at the front side of the slot 520 and detachably clamped in the clamping slot 311 of the nail striking plate 3. The inner walls 522 are spaced and opposite and extend from the top wall 521 to the bottom side and are located inside the side walls 512 of the handle 51, each inner wall 522 is embedded in the protrusion 516 of the adjacent side wall 512 and has a pivot groove 525 with an open front end, and the pivot groove 525 is slidably pivoted to the pivot 22. The sleeve-extruding block 523 is formed at the rear side of the top wall 521 and extends out of the sliding elongated slot 510 to be exposed and slidably disposed in the sliding elongated slot 510.

The elastic member 53 is elastically abutted between the handle 51 and the locking member 52 and is higher than the sliding long groove 510, and has a front end 531 sleeved on the sleeve-extruding block 523 of the locking member 52 and a rear end 532 opposite to the front end 531 and sleeved on the sleeve-abutting block 513 of the handle 51.

Referring to fig. 4 and 13, the handle 51 is rotatable relative to the pivot 22 between a starting position (fig. 4) and a nailing position (fig. 13).

As shown in fig. 4, when the handle 51 is at the initial position, the fastening end 524 of the fastening member 52 is embedded in the fastening groove 311 of the nail striking plate 3, and the driving arm 46 is sprung against the force receiving arm 45, preferably, the bottom end of the nail striking plate 3 is slightly higher than the position of the nail (not shown).

As shown in fig. 11, during the rotation of the handle 51 from the initial position to the nail striking position, the handle 51 presses the force receiving arm 45 of the power torsion spring 41 and gradually moves toward the bottom side and presses the return spring 43, so that the return spring 43 is compressed to store a potential energy for pushing the power torsion spring 41 to move toward the top side, the handle 51 drives the latch 52 to gradually move toward the top side and back and to connect the nail striking plate 3, the nail striking plate 3 drives the driving arm 46 of the power torsion spring 41 to gradually move toward the top side, and the power torsion spring 41 stores a potential energy for driving the nail striking plate 3 to move toward the bottom side.

As shown in fig. 12, at the moment when the handle 51 is rotated to the nailing position, the fastening end 524 of the fastening member 52 is just separated from the fastening slot 311 of the nailing piece 3, but is not yet separated, and the power torsion spring 41 does not release potential energy.

Next, as shown in fig. 13, when the handle 51 is at the nail striking position, the fastening end 524 of the fastening member 52 is disengaged from the fastening groove 311 of the nail striking plate 3, the energy-accumulating torsion spring 41 releases potential energy to make the driving arm 46 of the energy-accumulating torsion spring 41 move towards the bottom side to the bottom end of the nail striking plate 3 adjacent to the nail striking opening 26 to generate nail striking motion, and at this time, the driving arm 46 of the energy-accumulating torsion spring 41 moves towards the bottom side to contact with the limit stop 24 to be stopped, and cannot move towards the bottom side any more.

As shown in fig. 14, during the period that the handle 51 is returned from the nail striking position to the initial position, the return spring 43 releases potential energy and pushes the abutment seat 42 and the power storage torsion spring 41 to move toward the top side to link the handle 51 and the fastener 52 to rotate, and drives the driving arm 46 of the power storage torsion spring 41 to link the nail striking plate 3 to move toward the top side until the sliding portion 32 of the nail striking plate 3 slides against the fastening end 524 of the fastener 52 (see fig. 13), and the fastener 52 moves toward the rear side and translates relative to the handle 51 to press the front end 531 of the elastic member 53, so as to force the front end 531 toward the rear end 532 to close and make the elastic member 53 store a potential energy for pushing the fastener 52 to automatically insert into the nail striking plate 3 again.

Finally, by the fact that the fastening end 524 of the fastening member 52 continuously rotates toward the bottom side and the nail striking plate 3 continuously moves toward the top side, at the moment that the fastening end 524 of the fastening member 52 is aligned with the fastening groove 311 of the nail striking plate 3, the elastic member 53 releases potential energy and elastically pushes the fastening member 52 to move toward the front side through the front end 531, so that the fastening end 524 is automatically inserted into the fastening groove 311 of the nail striking plate 3 and is fastened to the nail striking plate 3 again, and thus the handle 51 can automatically return to the initial position as shown in fig. 4.

< example 1(E1) >

An embodiment 1(E1) of the nail gun of the present invention is implemented according to the first embodiment described above, and nails (not shown) of different specifications are respectively loaded into the embodiment 1(E1) and nailed to white pine (not shown) as a judgment standard. The specific conditions mentioned in the above specific example 1(E1) are as follows.

The wire diameter of the metal wire of the power-storage torsion spring 41 is 3.5mm, the angle theta 2 is 28 degrees, and the actual value of the pre-stored potential energy of the power-storage torsion spring 41 measured by a torsion spring pressure test method is 16.3 kg.

After nailing to the white pine, observing the state of nailing to the white pine as a judgment standard, and if the whole nail needle is driven into the white pine, the grade below the surface of the white pine is A; the grade of the thick lower surface of the nail needle is B, and the grade of the thick lower surface of the nail needle is slightly lower than the grade of the surface of the white pine; the grade of the thick lower surface of the nail needle is slightly higher than that of the white pine is C.

The test results of the above-mentioned example 1(E1) are summarized in Table 1 below.

Table 1.

< example 2(E2) >

An embodiment 2(E2) of the nail gun of the present invention is implemented according to the above-described first embodiment, and the specific conditions mentioned in the embodiment 2(E2) are as follows.

The wire diameter of the metal wire of the power-storage torsion spring 41 is 4.0mm, the angle theta 2 is 28 degrees, and the actual value of the pre-stored potential energy of the power-storage torsion spring 41 tested by a torsion spring pressure test method is 27.4 kg.

The test results of the above-mentioned example 2(E2) are summarized in Table 2 below.

Table 2.

< example 3(E3) >

An embodiment 3(E3) of the nail gun of the present invention is implemented according to the above-described first embodiment, and the specific conditions mentioned in the embodiment 3(E3) are as follows.

The wire diameter of the metal wire of the power-storage torsion spring 41 is 3.5mm, the angle theta 2 is 43 degrees, and the actual value of the pre-stored potential energy of the power-storage torsion spring 41 measured by a torsion spring pressure test method is 19.4 kg.

The test results of the above-mentioned example 3(E3) are summarized in Table 3 below.

Table 3.

Specifically, it is found from the test results of the example E1 and the example E2 that the larger the wire diameter of the power torsion spring 41 is, the larger the pre-stored potential energy of the power torsion spring 41 is and the larger the accumulated nail striking potential energy is. From the test results of the specific examples E1 and E3, it is found that the larger the angle θ 2 of the power torsion spring 41 is, the larger the pre-stored potential energy of the power torsion spring 41 is, and the larger the stored nail striking potential energy is, so that the pre-stored potential energy of the power torsion spring 41 can be changed by changing the wire diameter of the power torsion spring 41 and the angle θ 2, and the nail driving device is suitable for nails of different specifications.

From the above description, the advantages of the first embodiment can be summarized as follows:

first, this first embodiment utilizes the power torsional spring 41 by the natural state moves to when the user state, can accumulate certain pre-stored potential energy in advance, therefore, when using the nail rifle, only need press handle 51 and link hit nail piece 3 and drive power torsional spring 41 moves a small segment distance towards the top side, can make power torsional spring 41 accumulate enough to let hit nail piece 3 produce the potential energy of hitting the nail, therefore, use more laborsavingly.

Secondly, the preferred range of the wire diameter of the power-storing torsion spring 41 is 3.0mm to 4.5mm, or the preferred range of the angle θ 2 between the connecting section 451 of the force-receiving arm 45 and the extending section 461 of the driving arm 46 is 15 degrees to 45 degrees, so that the power-storing torsion spring 41 can be moved from the natural state to the use state conveniently besides having enough working torque to store enough potential energy to generate nail striking.

Referring to fig. 15, 16 and 17, a second embodiment of the present invention is similar to the first embodiment, and comprises the housing base unit 2, the nail striking plate 3, the power storage unit 4, the handle unit 5 and an adjusting unit 6, with the difference that:

one of the side walls 512 of the handle 51 further has a downwardly open groove 517, and one of the inner walls 522 of the latch 52 adjacent to the groove 517 further has a connecting block 526 passing through the groove 517 and movable relative to the groove 517.

The adjusting unit 6 is adjustably disposed on the handle unit 5 and the housing unit 2, and includes a cam 61, an adjusting member 62, and a knob 63. The cam 61 is rotatably disposed inside one of the housings 21 of the housing unit 2 and adjacent to the recess 517, the cam 61 has four protrusions 611 formed at different orientations, and the distance from each protrusion 611 to the rotation center of the cam 61 is different. The adjusting element 62 is slidably disposed on the cam 61, and has a rectangular slot 620 surrounded by an inner annular wall 621, and a locking portion 622 formed on the bottom side for pushing against the connecting block 526, and the cam 61 is accommodated in the slot 620, and a protrusion 611 pushes against the inner annular wall 621. The knob 63 is connected to the cam 61, exposed out of the housing base unit 2, and can rotate relative to the housing base unit 2, the knob 63 is used to drive the cam 61 to rotate relative to the housing base unit 2, and push one of the protrusions 611 against an inner annular wall 621 of the adjusting member 62, and link the latch portion 622 to push the connecting block 526, so as to drive the latch 52 to move relative to the pivot 22, thereby adjusting the time when the latch 52 is disengaged from the nail striking plate 3, and thus, a user can adjust the nail striking potential energy accumulated by the power torsion spring 41 by rotating the knob 63. For example, as shown in fig. 16, when one of the protrusions 611 having the shortest distance from the rotation center pushes against the inner annular wall 621 of the adjusting member 62, the latch 52 moves forward (i.e., advances) relative to the pivot 22, and the time for disengaging the latch 52 from the blade 3 is later, so the stored nailing potential energy of the power torsion spring 41 is larger, and conversely, as shown in fig. 17, when the other protrusion 611 having the longest distance from the rotation center pushes against the inner annular wall 621 of the adjusting member 62, the latch 52 moves backward (i.e., retreats) relative to the pivot 22, and the time for disengaging the latch 52 from the blade 3 is earlier, so the stored nailing potential energy of the power torsion spring 41 is smaller.

The second embodiment has the same effect as the first embodiment, and also has the advantage of enabling a user to select different nail striking potential, thereby facilitating application to different nail needle specifications.

The above description is only an example of the present invention, and the scope of the present invention should not be limited thereby, and the invention is still within the scope of the present invention by simple equivalent changes and modifications made according to the claims and the contents of the specification.

Claims

1. The utility model provides a hold power torsional spring, is applicable to and installs at the nail rifle and be used for the accumulation to hit nail potential energy, its characterized in that: the power storage torsion spring comprises:

the spring coil comprises a first end and a second end which are arranged in opposite directions;

the stressed arm extends from the first end of the spring coil to the front side, then extends to the bottom side and then extends to the inner side; and

the driving arm extends towards the front side from the second end of the spring coil and exceeds the force receiving arm, the driving arm is elastically abutted against the force receiving arm and enables the driving arm to accumulate pre-stored potential energy moving towards the bottom side,

the force receiving arm is provided with a connecting section extending forwards from the first end of the spring coil, a middle section extending towards the bottom side from the connecting section, and a restraining section extending towards the direction of the driving arm from the middle section, the restraining section is a free end, the driving arm is provided with an extending section extending towards the front side from the second end of the spring coil and elastically abutting against the restraining section of the force receiving arm, and an inserting section extending obliquely towards the front side from the extending section, the power storage torsion spring can be switched between a natural state of not being installed on the nail gun and a use state of being installed on the nail gun, when the power storage torsion spring is in the natural state, the extending section of the driving arm is lower than and far away from the restraining section of the force receiving arm, when the power storage torsion spring is in the use state, the driving arm elastically abuts against the restraining section of the force receiving arm, and a baseline extending in the front-back direction and passing through the center of the diameter of the inserting section is defined, when the power torsion spring is in the use state, the spring coil passes through the baseline, and when the power torsion spring is in the natural state, the spring coil is separated from the baseline.

2. A power torsion spring according to claim 1, wherein: the middle section of the stressed arm and the binding section form an angle, and the angle is not larger than 90 degrees.

3. A power torsion spring according to claim 1, wherein: the power storage torsion spring is formed by bending a metal wire with the diameter of 3.0mm to 4.5mm into a whole.

4. A power torsion spring according to claim 1, wherein: the connecting section of the force receiving arm extends outwards along a first extension line tangent to the outer peripheral surface of the spring coil and then extends outwards in an inclined mode, the extension section of the driving arm extends outwards along a second extension line tangent to the outer peripheral surface of the spring coil, and the connecting section of the force receiving arm and the extension section of the driving arm form an angle which is 15-45 degrees.

5. A nail gun, characterized in that: comprises the following steps:

the shell seat unit comprises a pivot, a fixed shaft positioned at the rear side of the pivot and a nail striking port positioned at the front side and formed at the bottom end;

the nail striking sheet is movably arranged in the shell seat unit along the top-bottom direction, and the bottom end of the nail striking sheet faces the nail striking port;

the power storage unit is arranged in the shell seat unit and comprises a power storage torsion spring which is rotatably arranged on the fixed shaft and connected with the nail striking plate, and a return spring which is elastically propped between the power storage torsion spring and the shell seat unit and can be compressed, the power storage torsion spring is provided with a spring ring which is rotatably sleeved on the fixed shaft, a force receiving arm which extends from a first end of the spring ring to the front side and then extends to the bottom side and then extends to the inner side, and a driving arm which extends from a second end of the spring ring opposite to the first end to the front side and exceeds the force receiving arm, the driving arm is penetrated in the nail striking plate and elastically propped against the force receiving arm, the driving arm is enabled to store the pre-stored potential energy moving to the bottom side, and the return spring elastically props against between the force receiving arm and the shell seat unit; and

the handle pressing unit is rotatably pivoted on the shell seat unit and comprises a handle which is rotatably pivoted on the pivot and is pressed against the power accumulating unit, a buckling piece which is positioned on the inner side of the handle and is movably pivoted on the pivot and is detachably embedded and clamped in the nail striking piece, and an elastic piece which is elastically pressed between the handle and the buckling piece, wherein the handle can rotate between an initial position and a nail striking position relative to the pivot, when the handle is positioned at the initial position, the buckling piece is embedded and clamped in the nail striking piece, during the period that the handle rotates from the initial position to the nail striking position, the handle presses the stress arm of the power accumulating torsion spring and gradually moves towards the bottom side and presses the reset spring, so that the reset spring accumulates potential energy for pushing the power accumulating torsion spring to move towards the top side, and the handle drives the buckling piece to gradually move towards the top side and towards the back side and drives the driving arm of the power accumulating torsion spring to gradually move towards the back side and drive the nail striking piece to drive the driving arm of the power accumulating torsion spring to gradually move towards the power accumulating Gradually moves towards the top side, so that the power-storage torsion spring accumulates potential energy for driving the nail striking piece to move towards the bottom side, when the handle is at the nail striking position, the buckling piece is separated from the nail striking piece, the power-storage torsion spring releases the potential energy to enable the driving arm of the power-storage torsion spring to drive the nail striking piece to move towards the bottom side to be adjacent to the nail striking opening at the bottom end of the nail striking piece and generate nail striking action, when the handle returns from the nail striking position towards the initial position, the reset spring releases the potential energy and pushes the power-storage torsion spring to move towards the top side to drive the handle and the buckling piece to rotate, and drives the driving arm of the power-storage torsion spring to drive the nail striking piece to move towards the top side to be in sliding contact with the buckling piece, and enables the buckling piece to move towards the handle and squeeze the elastic piece, so that the elastic piece accumulates the potential energy for pushing the buckling piece to automatically insert the nail striking piece again,

the stress arm of the power-accumulating torsion spring is provided with a connecting section extending from the first end of the spring coil to the front side, a middle section extending from the connecting section to the bottom side, and a constraint section extending from the middle section to the driving arm, the constraint section is a free end, the driving arm of the power-accumulating torsion spring is provided with an extending section extending from the second end of the spring coil to the front side and elastically abutting against the constraint section of the stress arm, and an inserting section inclining forwards from the extending section and penetrating into the nail striking sheet, the power-accumulating torsion spring can be switched between a natural state of not being installed on the nail gun and a use state of being installed on the nail gun, when the power-accumulating torsion spring is in the natural state, the extending section of the driving arm is lower than and far away from the constraint section of the stress arm, and when the power-accumulating torsion spring is in the use state, the driving arm elastically abuts against the constrained section of the stress arm, and a base line extending in the front-rear direction and passing through the center of the wire diameter of the insertion section is defined, the spring coil passes through the base line when the power torsion spring is in the use state, and the spring coil is separated from the base line when the power torsion spring is in the natural state.

6. The nail gun of claim 5, wherein: the middle section of the stressed arm and the binding section form an angle, and the angle is smaller than 90 degrees.