Wire spring mounted to nail gun and nail gun having wire spring

Abstract

A nail gun with a wire spring includes a housing unit, and a needle magazine unit, a pressing handle, a striker plate, a return member and a wire spring mounted on the housing unit. The housing unit includes an inner housing group made of plastic material, and an outer housing group made of metal plate and covering the outer part of the inner housing group. The wire spring includes an extension section and a return section. The extension section has a first end and a second end. The return section has a connecting end and a terminal end. When the connecting end extends towards the terminal end, the terminal end bends towards the first end. The cross section of the wire spring perpendicular to the axis has a width and a height. The ratio of the width to the height is between 1:1 and 1:1.6. The overall configuration has the effects of strengthening the structure and reducing the cost.

Description

Technical Field

[0001] This invention relates to a nail gun, and more particularly to a wire spring mounted on the nail gun and a nail gun having the wire spring. Background Technology

[0002] A nail gun (Taiwan Patent No. I365800) includes a body, a pressure handle pivotally connected to the body, a striker installed inside the body, an elastic plate installed inside the body, a nail magazine installed inside the body, and a misalignment means.

[0003] The main body is generally assembled from two side plates formed by stamping metal sheets and a front plate also formed by stamping metal sheets. The side plates and the front plate together define a chamber, and there is an opening at the bottom of the main body that communicates with the chamber.

[0004] When the user presses down the lever, the lever moves the impact plate from a preparatory position to a firing position, increasing the elastic potential energy of the plate. When the impact plate is in the firing position, one control end of the lever disengages from a control slot on the impact plate. At this point, the elastic potential energy of the plate is rapidly released, causing the impact plate to quickly return to its preparatory position and drive the nail into the target object.

[0005] While this nail gun can achieve the intended operational purpose, it still has the following shortcomings:

[0006] 1. The elastic plate is formed by stamping metal sheet. In order to be positioned relative to the body, an axle tube must be welded to the top and bottom surfaces of the elastic plate, and the two positioning shafts are respectively inserted through the axle tube and the body. The manufacturing and installation of the elastic plate is relatively complicated.

[0007] Second, the entire body is formed by stamping metal sheets, including the side panels and the front panel. In particular, the front panel must be stamped to create a recessed space so that the elastic plate and the front end of the pressure handle have room to rotate. Overall, the manufacturing process is more complicated and the cost is higher.

[0008] Third, if the main body is made of plastic, although the above problems can be overcome, considering the overall structural strength, the thickness of the side panels and front panels must be increased, which will affect the texture of the product's appearance.

[0009] Fourth, although the bottom edge of the side plate is bent to form a rail for the nail box to slide into, when the nail box slides along the rail, because the rail is relatively long, in order to ensure that the nail box is positioned longitudinally, a "central support" that can cover and position the nail box must be set, which will increase the complexity of the structure and increase the manufacturing cost. Summary of the Invention

[0010] One object of the present invention is to provide a wire spring that is simple in shape and easy to manufacture and assemble for mounting in a nail gun.

[0011] Another object of the present invention is to provide a nail gun with a wire spring that can solve the existing deficiencies.

[0012] The present invention provides a wire spring for mounting in a nail gun, comprising an extension section and a rewinding section connected to the extension section. The extension section has a first end and a second end along an axis opposite to the first end. The rewinding section has a connecting end connected to the second end and an end portion opposite to the connecting end. When the connecting end extends toward the end portion, the end portion bends back toward the location of the first end. The cross-section of the wire spring perpendicular to the axis has a width perpendicular to the axis and a height perpendicular to the width, and the ratio of the width to the height is between 1:1 and 1:1.6.

[0013] The wire spring of the present invention is mounted on a nail gun, wherein the extension section and the rewinding section are connected in an L-shape.

[0014] The present invention relates to a wire spring mounted on a nail gun, wherein the extension section of the wire spring and the winding section are mirror-symmetrical about a centerline and along a transverse axis perpendicular to the centerline. The extension section further has a front portion approaching the centerline, an inclined portion connected to the front portion, a straight portion connected to the inclined portion, and a curved portion connected to the straight portion. A first end is disposed at the front portion, a second end is located at the centerline and disposed at the curved portion, and the straight portion is farther away from the centerline than the front portion.

[0015] The present invention relates to a nail gun with a spring, comprising a housing unit, and a needle magazine unit, a pressure handle, a striker, a return element, and a spring mounted on the housing unit. The housing unit includes an inner housing assembly made of plastic that defines a receiving space, and an outer housing assembly made of sheet metal that covers the inner housing assembly. The inner housing assembly has an opening communicating with the receiving space. The needle magazine unit is mounted inside the housing unit. The pressure handle is pivotally connected to the housing unit. The striker is slidable and mounted inside the housing unit, and is movable from the opening outwards from the housing unit by the pressure handle. The return element is mounted inside the housing unit and springs against the pressure handle, providing pressure. The spring, which is mounted inside the housing unit and provides the spring force for the impact of the impact plate, includes an extension section and a return section connected to the extension section. The extension section has a first end connected to the impact plate and a second end along an axis opposite to the first end. The return section has a connecting end connected to the second end and an end portion opposite to the connecting end. When the connecting end extends toward the end portion, the end portion bends back toward the location of the first end. The cross-section of the spring perpendicular to the axis has a width perpendicular to the axis and a height perpendicular to the width, and the ratio of the width to the height is between 1:1 and 1:1.6.

[0016] The nail gun with a wire spring of the present invention has an inner shell assembly of the housing unit having two opposite side surfaces, a front end face connecting the side surfaces, a rear end face opposite to the front end face, a top end face connecting the front end face and the rear end face, a bottom end face opposite to the top end face and having the opening, a front protrusion protruding from the front end face and defining a front recess communicating with the receiving space, a top protrusion protruding from the top end face, an inner through hole communicating with the side surfaces, two first grooves respectively recessed on the side surfaces and surrounding the inner through hole, two second grooves respectively located at the junction of the front end face and the front protrusion, and two third grooves respectively located at the junction of the top end face and the top protrusion. The outer shell assembly has two side shells, each side shell having an inner ring edge defining an outer through hole and an outer ring edge surrounding the outer side of the inner ring edge. The inner ring edge is respectively embedded in the first groove, and the outer ring edge is respectively embedded in the second groove and the third groove.

[0017] The nail gun of the present invention has a spring-loaded inner shell assembly of the housing unit, which further comprises two mating inner shell members. Each inner shell member has a bottom edge defining the bottom end face, a groove recessed from the bottom edge, and a partition disposed above the groove and parallel to the bottom edge. The side shells of the outer shell assembly are respectively disposed outside the inner shell members, and each side shell has a baffle. The baffle and the corresponding groove together form a track. The needle cartridge unit has a pair of sliders that can slide and are mounted on the track. The partition provides a top stop limit for the needle cartridge unit.

[0018] The present invention relates to a nail gun having a wire spring, wherein the extension of the wire spring is connected to the rewinding section in an L-shape.

[0019] The present invention provides a nail gun with a wire spring, wherein the extension section of the wire spring and the winding section are mirror-symmetrical along a transverse axis perpendicular to the center line, the extension section further having a front portion approaching the center line, an inclined portion connected to the front portion, a straight portion connected to the inclined portion, and a curved portion connected to the straight portion, the first end being disposed at the front portion, the second end being located at the center line and disposed at the curved portion, and the straight portion being farther away from the center line than the front portion.

[0020] The beneficial effects of the present invention are as follows: the wire spring has a simple shape, is easy to manufacture and install, which can reduce costs. Furthermore, the outer shell assembly of the housing unit is made of metal sheet and covers the outer shell assembly made of plastic material, which not only strengthens the overall structural strength but also improves the appearance and texture. Attached Figure Description

[0021] Figure 1 This is a perspective view of the first embodiment of the nail gun with a wire spring of the present invention;

[0022] Figure 2 This is an exploded perspective view of the first embodiment;

[0023] Figure 3 This is a partially exploded perspective view of the first embodiment;

[0024] Figure 4 This is a front view combined sectional view of the first embodiment;

[0025] Figure 5 It is along Figure 4 The sectional view taken from line V-V in the diagram;

[0026] Figure 6 It is along Figure 4 The solid sectional view taken by line VI-VI in the diagram;

[0027] Figure 7 yes Figure 6A magnified planar schematic diagram of a portion of the image;

[0028] Figure 8 yes Figure 6 Another magnified planar schematic diagram;

[0029] Figure 9 It is along Figure 4 The sectional view taken from line IX-IX in the diagram;

[0030] Figure 10 It is along Figure 4 The sectional view taken from the line X-X in the diagram;

[0031] Figure 11 It is along Figure 4 The sectional view taken by the line XI-XI in the middle;

[0032] Figure 12 This is a variation of the first embodiment, illustrating a schematic diagram of a cross-sectional change in an inner shell component;

[0033] Figure 13 This is a three-dimensional assembly diagram of the second embodiment of the nail gun with a wire spring of the present invention, illustrating the removal of a portion of the housing unit;

[0034] Figure 14 This is a schematic diagram of the wire spring in the second embodiment. Detailed Implementation

[0035] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] See Figures 1 to 4 The first embodiment of the nail gun with a wire spring of the present invention includes a housing unit 1, and a needle cartridge unit 30, a pressure handle 40, a striker 50, a return member 60 and a wire spring 70 mounted on the housing unit 1.

[0037] Coordination Figures 5 to 10 The housing unit 1 includes an inner shell assembly 10 that defines a receiving space 101, and an outer shell assembly 20 made of sheet metal and covering the outside of the inner shell assembly 10.

[0038] The inner shell assembly 10 has two opposing inner shell members 11 that together define the receiving space 101, two opposite side surfaces 12, a front face 13 connected between the side surfaces 12, a rear face 14 opposite to the front face 13, a top face 15 connected between the front face 13 and the rear face 14, a bottom face 16 opposite to the top face 15 and having an opening 161 communicating with the receiving space 101, and a protrusion from the front face 13 that defines a space 101. The accommodating space 101 includes a front protrusion 17 connected to the front recess 171, a top protrusion 18 protruding from the top surface 15, an inner through hole 19 connecting to the side surface 12, two first grooves 102 respectively recessed on the side surface 12 and surrounding the inner through hole 19, two second grooves 103 respectively located at the junction of the front end surface 13 and the front protrusion 17, two third grooves 104 respectively located at the junction of the top surface 15 and the top protrusion 18, and a sliding groove 105 adjacent to the front recess 171. Each inner shell component 11 has a bottom edge 111 defining the bottom end face 16, a groove 112 recessed from the bottom edge 111, a partition 113 disposed above the groove 112 and parallel to the bottom edge, an intermediate support 114 disposed above the inner through hole 19, a side support 115 disposed on one side of the intermediate support 114 and adjacent to the front recess 171, a side support 116 disposed on one side of the intermediate support 114 and above the inner through hole 19, a positioning block 117 disposed on one side of the side support 116, and a slot 118 disposed between the side support 116 and the positioning block 117. The inner shell 11 is made of plastic and is manufactured by injection molding. The front protrusion 17, the top protrusion 18, the inner through hole 19, the first groove 102, the second groove 103, the third groove 104, the sliding groove 105, the recess 112, the partition 113, the intermediate support 114, the side support 115, the side support 116, and the positioning block 117 are all directly manufactured by injection molding and do not require additional processing.

[0039] The outer casing assembly 20 has two side shells 201 made of sheet metal by stamping. The side shells 201 are respectively disposed on the outside of the inner casing 11. Each side shell 201 has an inner ring edge 21 that defines an outer through hole 202, an outer ring edge 22 surrounding the outer side of the inner ring edge 21, a baffle 23, and an abutment plate 24 disposed on one side of the baffle 23. The baffle 23 and the corresponding groove 112 together form a track 106. The inner ring edge 21 is respectively embedded in the first groove 102. Each outer ring edge 22 has a front locking part 221 embedded in the second groove 103 and corresponding to the front protrusion 17 and in an inverted U-shape, and a top locking part 222 embedded in the third groove 104 and corresponding to the top protrusion 18 and in a shape corresponding to the third groove 104.

[0040] The needle cartridge unit 30 is slidable and mounted inside the receiving space 101, and has a pair of sliders 31 that are slidable and mounted on the track 106. The partition 113 provides a top stop limit for the needle cartridge unit 30.

[0041] The pressure handle 40 is pivotally connected to the housing unit 1 and has an actuating part 41 that can extend into the front recess 171, and a pressing part 42 that is opposite to the actuating part 41 and located outside the housing unit 1.

[0042] The impact plate 50 is slidable and mounted in the slide groove 105, and has an upper insertion hole 51 into which the actuating part 41 of the pressure handle 40 is inserted, a lower insertion hole 52 disposed below the upper insertion hole 51, and a hammer end 53 disposed below the lower insertion hole 52. The impact plate 50 is driven by the pressure handle 40 to move the hammer end 53 from the opening 161 toward the outside of the housing unit 1.

[0043] The return element 60 is installed inside the receiving space 101 and springs against the inner side of the actuating part 41 of the pressure handle 40, providing the pressure handle 40 with a restoring elastic force.

[0044] The spring 70 is formed by bending an elastic metal rod and is installed inside the receiving space 101, providing the spring force when the impact plate 50 strikes. The spring 70 includes an extension section 71 and a return section 72 connected to the extension section 71. In this embodiment, the extension section 71 and the return section 72 are connected in an L-shape. The front end of the extension section 71 abuts against the top of the side support 115, the middle section of the extension section 71 abuts against the bottom edge of the middle support column 114, the junction of the extension section 71 and the return section 72 spans the top edge of the side support column 116, and the return section 72 is embedded in the slot 118 and is clamped and limited by the side support column 116 and the positioning block 117. The extension segment 71 has a first end 711 embedded in the lower recess 52 of the impact plate 50, and a second end 712 opposite to the first end 711 along an axis L. The winding segment 72 has a connecting end 721 connected to the second end 712, and an end portion 722 opposite to the connecting end 721. When the connecting end 721 extends toward the end portion 722, the end portion 722 bends back toward the location of the first end 711. In this embodiment, the extension segment 71 is straight in its original state, and the cross section of the wire spring 70 perpendicular to the axis L has a width w perpendicular to the axis L and a height h perpendicular to the width w (see...). Figure 11 The width w and the height h are between 1:1 and 1:1.6. In this embodiment, the cross-section of the wire spring 70 is oblong, but it is understood that other geometric cross-sectional shapes are also included, as long as the ratio of the width w to the height h is between 1:1 and 1:1.6.

[0045] To further understand the effects of the combination of the components of this invention, the technical means employed, and the expected benefits, the following explanation will be provided, which will hopefully lead to a deeper and more specific understanding of this invention.

[0046] like Figure 4 As shown, when the entire assembly is completed and the housing unit 1 is riveted together by several rivets 80, when the pressure handle 40 has not been operated, the pressure handle 40 is subjected to the elastic force of the return member 60, the braking part 41 is inserted into the upper recess 51 of the impact plate 50, and the impact plate 50 is in an unfired position.

[0047] When the user presses down on the pressing part 42 of the handle 40, the actuating part 41 of the handle 40 first moves the impact plate 50 upward to a preparatory position (at this time, the return member 60 is compressed and contains a release force). The extension 71 of the wire spring 70 is pulled by the impact plate 50 and elastically becomes curved and contains elasticity. Until the actuating part 41 disengages from the upper insertion hole 51, the elasticity of the wire spring 70 moves the impact plate 50 from the preparatory position downward to a firing position, achieving the firing pin purpose. After firing, the wire spring 70 rebounds and moves the impact plate 50 upward again. The elasticity of the return member 60 then inserts the actuating part 41 of the handle 40 into the upper insertion hole 51, thus returning it to the preparatory position. Figure 4 The state.

[0048] The effects of this invention are summarized below:

[0049] First, the coil spring 70 is formed by bending an elastic metal rod and is directly manufactured by injection molding using the intermediate support 114, the side support 115, the side support 116, and the positioning block 117 of the inner shell 11. No additional processing is required, allowing the coil spring 70 to be stably positioned between the inner shell 11 members. The manufacturing and installation of the coil spring 70 are quite easy, reducing costs. Furthermore, the ratio of the width w to the height h of the coil spring 70 is between 1:1 and 1:1.6, ensuring sufficient structural strength. If increased elasticity is desired, the number of coil springs 70 can be increased.

[0050] 2. The housing unit 1 includes an inner shell assembly 10 made of plastic and an outer shell assembly 20 made of metal sheet and covering the outside of the inner shell assembly 10. The front recess 171 of the inner shell assembly 10 is already set during injection molding and does not need to be processed again. The inner ring edge 21 of the outer shell assembly 20 is respectively embedded in the first groove 102, the front insert portion 221 of the outer ring edge 22 is embedded in the second groove 103, and the top insert portion 222 is embedded in the third groove 104. In addition to enhancing the positioning of the outer shell assembly 20 and the inner shell assembly 10, it can also prevent the edge of the outer shell assembly 20 from lifting.

[0051] Third, the housing unit 1 includes an inner shell assembly 10 made of plastic material and an outer shell assembly 20 made of metal sheet and covering the outside of the inner shell assembly 10, which can maintain the texture of the metal appearance and ensure the overall structural strength.

[0052] Fourth, the baffle 23 and the corresponding groove 112 together form the track 106, and the partition 113 provides a stop limit for the top of the needle cartridge unit 30, which can ensure that the needle cartridge unit 30 slides smoothly and stably relative to the housing unit 1. There is no need to set a "middle support" to cover and position the needle cartridge unit 30, so the overall structure will not increase the complexity or manufacturing cost.

[0053] In addition to the baffle 23 and the corresponding groove 112 forming the track 106 of the present invention, see also... Figure 12 If the groove is not provided, a rib 111' can be provided on the inner side of the bottom edge 111 of each inner shell 11, and the baffle 23 and the corresponding rib 111' can be used to form the track 106.

[0054] See also Figure 13 , Figure 14 The second embodiment of the nail gun of the present invention with a wire spring differs from the first embodiment in that the wire spring 70' has an extension 71' and a rewinding section 72' separated by a center line L1 and are mirror-symmetrical along a transverse axis X perpendicular to the center line L1. The extension 71' also has a front portion 713' approaching the center line L1, an inclined portion 714' connected to the front portion 713', a straight portion 715' connected to the inclined portion 714', and a curved portion 716' connected to the straight portion 715'. The first end 711' is disposed on the front portion 713', the second end 712' is located on the center line L1 and disposed on the curved portion 716', and the straight portion 715' is farther away from the center line L1 than the front portion 713'. The same purpose and effect as the first embodiment can be achieved by using the wire spring 70' of the second embodiment.

[0055] It is worth mentioning that the shape of the spring of the present invention is not limited to the two embodiments mentioned above. The winding section can also be wound into a C-shaped hollow tube, or the extension section can be connected to the winding section in a ">" shape (not shown in the figure), all of which can achieve the expected effect and purpose.

[0056] In summary, the nail gun with a wire spring of the present invention simplifies assembly and reduces manufacturing costs through its overall configuration, thus effectively achieving the purpose of the present invention.

Claims

1. A nail gun with a wire spring, comprising a housing unit, and a needle magazine unit, a pressure handle, a striking plate, a return member, and a wire spring mounted on the housing unit, characterized in that: The housing unit includes an inner shell assembly made of plastic that defines a receiving space, and an outer shell assembly made of sheet metal that covers the outer surface of the inner shell assembly. The inner shell assembly has two opposite sides, a front end face connecting the sides, a rear end face opposite to the front end face, a top end face connecting the front end face and the rear end face, a bottom end face opposite to the top end face and having an opening, a front protrusion protruding from the front end face and defining a front recess communicating with the receiving space, and a top protrusion protruding from the top end face. The housing assembly comprises an inner through hole connecting the side surface, two first grooves respectively recessed on the side surface and surrounding the inner through hole, two second grooves respectively located at the junction of the front end face and the front protrusion, and two third grooves respectively located at the junction of the top end face and the top protrusion. The housing assembly has two side shells, each side shell having an inner ring edge that defines the outer through hole, and an outer ring edge surrounding the outer side of the inner ring edge. The inner ring edge is respectively embedded in the first groove, and the outer ring edge is respectively embedded in the second groove and the third groove. The needle cartridge unit is installed inside the housing unit; The pressure handle is pivotally connected to the housing unit; The impact plate is slidable and installed inside the housing unit, and can move out of the housing unit through the opening due to the linkage of the pressure handle; The return element is installed inside the housing unit and springs against the pressure handle, providing the pressure handle with a return force; The coil spring, installed inside the housing unit and providing the spring force from the impact plate, includes an extension section and a return section connected to the extension section. The extension section has a first end connected to the impact plate and a second end along an axis opposite to the first end. The return section has a connecting end connected to the second end and an end portion opposite to the connecting end. When the connecting end extends toward the end portion, the end portion bends back toward the location of the first end. The cross-section of the coil spring perpendicular to the axis has a width perpendicular to the axis and a height perpendicular to the width, and the ratio of the width to the height is between 1:1 and 1:1.

6.

2. The nail gun with a wire spring according to claim 1, characterized in that: The inner shell assembly of the housing unit also has two mating inner shell members. Each inner shell member has a bottom edge defining the bottom end face, a groove recessed from the bottom edge, and a partition disposed above the groove and parallel to the bottom edge. The side shells of the outer shell assembly are respectively disposed outside the inner shell members, and each side shell has a baffle. The baffle and the corresponding groove together form a track. The needle cartridge unit has a pair of sliders that can slide and are mounted on the track. The partition provides a stop limit for the top of the needle cartridge unit.

3. The nail gun with a wire spring according to claim 1, characterized in that: The extension of the coil spring is connected to the rewinding section in an L-shape.

4. The nail gun with a wire spring according to claim 1, characterized in that: The extension section of the coil spring and the return section are mirror-symmetrical about each other along a transverse axis perpendicular to the center line, with the center line as the boundary. The extension section also has a front portion approaching the center line, an inclined portion connected to the front portion, a straight portion connected to the inclined portion, and a curved portion connected to the straight portion. The first end is located at the front portion, the second end is located at the center line and is located at the curved portion, and the straight portion is farther away from the center line than the front portion.

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