Nosepiece units for straight and u-shaped nails and nail guns

Abstract

This invention provides a nozzle unit and a nail gun suitable for straight nails and U-shaped nails. The nozzle unit includes a nozzle body and a nail limiting part. The nozzle body has a U-shaped nail receiving port for U-shaped nails and a straight nail receiving port for straight nails, with the straight nail receiving port located inside the U-shaped nail receiving port. This means that each type of nail has a separate receiving port, allowing the nozzle unit to receive both straight and U-shaped nails from the nail magazine. Even with a significant difference in wire diameter, the separate receiving ports can effectively receive the corresponding type of nail, minimizing issues like uneven nail ejection or jamming. The nail limiting part can limit the straight nail within the nail ejection slot, thus solving the problem of wide nail ejection slots causing poor guidance and potentially preventing proper nail ejection. This allows the same nail gun to fire both straight and U-shaped nails without the need for multiple nail guns, making it more convenient to carry and use, and reducing equipment costs.

Description

Technical Field

[0001] This invention belongs to the field of fastening tool technology, specifically relating to a nozzle unit suitable for straight nails and U-shaped nails, as well as a nail gun. Background Technology

[0002] A nail gun is a common fastening tool that fires nails from a magazine sequentially. Nails come in various types, such as straight nails, U-shaped nails, and L-shaped nails. Traditional nail guns were typically designed to fire only one type of nail. For example, if the nail track in the magazine was straight and the nozzle connecting to the nail track was also straight, then the nail gun could only fire straight nails. However, some manufacturing processes require multiple types of nails. For instance, in sofa manufacturing, straight nails and U-shaped nails need to be used sequentially. In such cases, at least two nail guns would be needed on-site for switching between them, which is inconvenient to carry and use.

[0003] Currently, while some nozzle structures exist that can be used for two or more nail types simultaneously, these structures often require different types of nails to share a common nail insertion port. For example, in nozzle structures capable of firing both straight and U-shaped nails, part of the straight nail insertion port is also used as part of the U-shaped nail insertion port, and the ejection groove corresponds to the width of the U-shaped nail. This leads to several problems: First, when the wire diameters of the straight and U-shaped nails differ significantly, the mismatch between the insertion port size and one of them can cause uneven nail ejection and nail jamming. Second, due to the wide ejection groove, straight nails cannot be properly restrained and guided within it. When firing straight nails, this can result in reduced driving force, nail deviation, or even nail jamming, which can also cause wear on the nozzle structure. Summary of the Invention

[0004] This invention addresses the aforementioned problems and aims to provide a dual-purpose nozzle unit suitable for both straight and U-shaped nails with significant differences in wire diameter, while ensuring the force and stability of nail delivery. The invention employs the following technical solution:

[0005] This invention provides a nozzle unit suitable for straight nails and U-shaped nails, installed in a nail gun. It is characterized by comprising: a nozzle body and a straight nail limiting part, wherein the nozzle body has: a U-shaped nail receiving port for passing through a U-shaped nail; a straight nail receiving port located inside the U-shaped nail receiving port for passing through a straight nail; and a nail outlet groove communicating with both the U-shaped nail receiving port and the straight nail receiving port for accommodating the straight nail or the U-shaped nail to be fired. The straight nail limiting part is used to limit the straight nail within the nail outlet groove.

[0006] The nozzle unit for straight nails and U-shaped nails provided by the present invention may also have the following technical features, wherein the straight nail limiting part includes: a connecting seat connected to the nozzle body; and two limiting members, one end of which is rotatably connected to the connecting seat, and the middle and the other end of which are disposed in the nail outlet groove. The extending direction of the limiting members is consistent with the extending direction of the nail outlet groove, and a guide groove communicating with the straight nail receiving port is formed between the two limiting members for limiting and guiding the straight nail.

[0007] The nozzle unit for straight nails and U-shaped nails provided by the present invention may also have the following technical features: the distance between the two limiting members corresponds to the width of the straight nail and is less than the overall width of the U-shaped nail; the width of the nail outlet groove corresponds to the overall width of the U-shaped nail; and the two limiting members are located at the middle of the width direction of the nail outlet groove.

[0008] The nozzle unit for straight nails and U-shaped nails provided by the present invention may also have the following technical features: the nozzle body has two strip-shaped clearance grooves, which are positioned corresponding to the two limiting members. One side of the nail outlet groove is connected to the U-shaped nail receiving port and the straight nail receiving port, and the other side opposite to this side is connected to the clearance groove.

[0009] The nozzle unit for straight nails and U-shaped nails provided by the present invention may also have the following technical features, wherein the nozzle body includes: a nozzle connecting plate for connecting a nail cartridge, wherein the U-shaped nail receiving port and the straight nail receiving port are disposed on the nozzle connecting plate, and a nail groove is disposed on one side of the nozzle connecting plate; and a nozzle cover plate detachably connected to the nozzle connecting plate, wherein a clearance groove is disposed on the side of the nozzle cover plate connected to the nozzle connecting plate.

[0010] The nozzle unit for straight nails and U-shaped nails provided by the present invention may also have the following technical features: the limiting member is strip-shaped; the connecting seat has: two limiting member mounting grooves, one end of each of the two limiting members being rotatably connected in the two limiting member mounting grooves; and two spring receiving grooves, which are cylindrical grooves, respectively formed in the two limiting member mounting grooves; the straight nail limiting part also includes two return springs, respectively accommodated in the two spring receiving grooves, one end of each return spring abutting against the bottom of the spring receiving groove, and the other end abutting against the limiting member.

[0011] The nozzle unit for straight nails and U-shaped nails provided by the present invention may also have the following technical features: the surface direction of the limiting member is parallel to the through direction of the straight nail receiving port; the straight nail limiting part further includes two balls, which are respectively accommodated in the two spring receiving grooves; and the other end of the return spring abuts against one end of the limiting member in the width direction through the balls.

[0012] The nozzle unit for straight nails and U-shaped nails provided by the present invention may also have the following technical features, wherein the limiting member includes: a limiting member connecting portion rotatably connected to the connecting seat; and a limiting member main body portion, which is strip-shaped and has one end connected to the limiting member connecting portion. The limiting member main body portion is accommodated in the nail outlet groove. The limiting member main body portion includes: a first extension segment, one end of which is connected to the limiting member connecting portion; and a second extension segment, one end of which is connected to the other end of the first extension segment. The angle between the extension direction of the second extension segment and the extension direction of the first extension segment is an obtuse angle.

[0013] The nozzle unit for straight nails and U-shaped nails provided by the present invention may also have the following technical features: the straight nail receiving port includes multiple strip-shaped portions and multiple square portions connected alternately in sequence for straight nails of different lengths to pass through; the cross-section of the U-shaped receiving port is an arc-shaped U-shape or a right-angled U-shape.

[0014] The present invention provides a nail gun, characterized in that it comprises: a nozzle unit for firing nails; and a nail magazine for storing a row of nails and sequentially supplying the nails in the row of nails to the nozzle unit, wherein the nozzle unit is the above-mentioned nozzle unit suitable for straight nails and U-shaped nails.

[0015] Invention Function and Effect

[0016] The nozzle unit and nail gun of the present invention, applicable to straight nails and U-shaped nails, includes a nozzle body and a nail limiting part. The nozzle body has a U-shaped nail receiving port for U-shaped nails and a straight nail receiving port for straight nails, with the straight nail receiving port located inside the U-shaped nail receiving port. That is, each type of nail has an independent, separate receiving port. Therefore, the nozzle unit can receive straight nails or U-shaped nails from the nail magazine, and even if the wire diameters of the two types of nails differ significantly, the separate receiving ports can effectively receive the corresponding type of nail, reducing the likelihood of uneven nail ejection or nail jamming. Furthermore, the nail limiting part can limit the straight nail within the nail ejection slot, thus solving the problem that a wide nail ejection slot may prevent the straight nail from being properly guided and ejected. This allows the same nail gun to fire both straight nails and U-shaped nails normally, eliminating the need for multiple nail guns, making it more convenient to carry and use, and reducing equipment costs. Attached Figure Description

[0017] Figure 1 This is a perspective view of the nozzle unit in an embodiment of the present invention;

[0018] Figure 2 This is an exploded view of the nozzle unit in an embodiment of the present invention;

[0019] Figure 3 This is a perspective view of the nozzle connecting plate in an embodiment of the present invention;

[0020] Figure 4 This is a frontal projection view of the nozzle connecting plate in an embodiment of the present invention;

[0021] Figure 5 This is a perspective view of the nozzle cover plate in an embodiment of the present invention;

[0022] Figure 6 This is a perspective view of the connector in an embodiment of the present invention;

[0023] Figure 7 These are perspective views of the connector at different angles in embodiments of the present invention;

[0024] Figure 8 This is a perspective view of the limiting member in an embodiment of the present invention;

[0025] Figure 9 This is an orthographic projection of the nozzle unit structure in an embodiment of the present invention;

[0026] Figure 10 This is a cross-sectional view of the nozzle unit structure in an embodiment of the present invention;

[0027] Figure 11 This is a cross-sectional view of the nozzle unit in an embodiment of the present invention;

[0028] Figure 12 This is a perspective view of the dual-purpose nail box in an embodiment of the present invention;

[0029] Figure 13 This is an exploded view of the dual-purpose nail box in an embodiment of the present invention;

[0030] Figure 14 This is a perspective view of the first nail-receiving component in an embodiment of the present invention;

[0031] Figure 15 This is a perspective view of the second nail-receiving component in an embodiment of the present invention;

[0032] Figure 16 This is a perspective view of the third nail-receiving component in an embodiment of the present invention;

[0033] Figure 17 This is an orthographic projection of the three nail-receiving components in an embodiment of the present invention.

[0034] Figure 18 This is a perspective view of the dual-purpose nail box structure in an embodiment of the present invention;

[0035] Figure 19 This is a perspective view of the first pusher pin in an embodiment of the present invention;

[0036] Figure 20 This is a perspective view of the second pusher pin in an embodiment of the present invention;

[0037] Figure 21 This is a frontal projection of the dual-purpose nail box in an embodiment of the present invention;

[0038] Figure 22 This is a schematic diagram of the straight nail structure in an embodiment of the present invention;

[0039] Figure 23 This is a schematic diagram of the structure of the U-shaped nail in an embodiment of the present invention;

[0040] Figure 24 This is a frontal projection view of the nozzle connecting plate in a modified embodiment of the present invention;

[0041] Figure 25 This is a schematic diagram of the U-shaped nail in a modified example of the present invention.

[0042] Figure label:

[0043] 20 nozzle unit; 21 nozzle body; 211 nozzle connecting plate; 211a nail ejection end; 211b gun body connecting end; 2111 nail ejection groove; 2112 straight nail insertion port; 2112a strip portion; 2112b square portion; 2113 U-shaped nail insertion port; 2114 nail magazine connecting hole; 2115 cover plate connecting hole; 2116 gun body connecting hole; 212 nozzle cover plate; 2121 clearance groove; 2122 cover plate mounting hole; 2123 mounting notch; 22 straight nail limiting part; 221 connecting seat; 221 connecting seat body portion; 22111 limiting member connecting plate; 22111 limiting member mounting groove; 22111a; first connecting hole; 22111b; second connecting hole; 221 11c; Connecting block 22113; Spring receiving groove 22113a; Connecting seat fixing part 2212; Connecting seat fixing hole 2212a; Limiting member 222; Limiting member connecting part 2221; Limiting member mounting hole 2221a; Limiting end 22211; Limiting member main body part 2222; First extension section 22221; Second extension section 22222; Extension end 2222a; Return spring 223; Ball bearing 224; Dual-purpose nail box 10; Nail receiving part 11; First nail receiving member 111; First main body part 1111; Bottom 1111a; Side part 1111b; Elastic member receiving part 1112; Elastic member receiving hole 1112a; Guide groove 1112b; Blocking connection hole 1112c; observation notch 1112d; first extension 1113; second extension 1114; component receiving groove 1115; first base connection hole 1116; first fixing hole 1117; second nail receiving component 112; second main body 1121; second strip-shaped protrusion 1122; second groove 1122a; second block-shaped protrusion 1123; second base connection hole 1126; second fixing hole 1127; third nail receiving component 113; fitting and fixing part 1131; component end fitting groove 1131a; inlay fitting groove 1131b; nozzle connection hole 1131c; third main body 1132; third strip-shaped protrusion 1133; third Block protrusion 1134; third extension 1135; inlay 114; base piece 115; component mounting groove 1151; straight nail channel 117; U-shaped nail channel 118; push nail passage 119; push nail part 12; first push nail part 121; first push nail body part 1211; first hole part 1211a; second hole part 1211b; first connecting piece part 1212; elastic connecting piece part 1213; guide piece part 1214; second push nail part 122; second push nail body part 1221; second connecting piece part 1222; push nail protrusion 1221a; spring 123; connecting pin 124; straight nail 100; nail body 101; nail head 102; U-shaped nail 200. Detailed Implementation

[0044] To make the technical means, creative features, objectives and effects of the present invention easy to understand, the following describes in detail the nozzle unit and nail gun of the present invention applicable to straight nails and U-shaped nails, in conjunction with the embodiments and accompanying drawings.

[0045] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] <Example>

[0047] This embodiment provides a nail gun, comprising a nozzle unit for firing nails, a nail magazine for storing and sequentially feeding nails from the nail pack to the nozzle unit, and a main body. The main body includes a housing and a firing pin, a drive mechanism, etc., disposed within the housing, for firing the nails from the nozzle unit. The structures of the nail magazine and the main body of the nail gun are existing technologies and will not be described in detail. The nail gun of this embodiment is suitable for straight nails and U-shaped nails with large differences in wire diameter. The structure of the nozzle unit is based on the structural design of straight nails and U-shaped nails; therefore, the structures of the two types of nails will be briefly described below.

[0048] Figure 22 This is a schematic diagram of the straight nail structure in this embodiment.

[0049] like Figure 22 As shown, the straight nail 100 (also called a T-nail) includes a straight nail body 101 and a nail head 102 connected to one end of the nail body 101. The other end of the nail body 101 is the nail tip. Viewed from the side, the straight nail 100 is T-shaped. In this embodiment, the wire diameter of the straight nail 100 (i.e., the diameter of the cylindrical nail body 101) is 1.05 mm, and the overall length is available in five specifications: 15 mm, 20 mm, 25 mm, 30 mm, and 32 mm. The dimensions of the nail head 102 and the wire diameter of the nail body 101 are the same for all specifications of the straight nail 100.

[0050] Figure 23 This is a schematic diagram of the U-shaped nail in this embodiment.

[0051] like Figure 23As shown, the U-shaped nail 200 is U-shaped overall, with nail tips at both ends. Along the extension direction of the U-shaped nail 200, its cross-section is circular. In this embodiment, the wire diameter of the U-shaped nail 200 (i.e., the diameter of the circular cross-section) is 0.6 mm, significantly smaller than the wire diameter of the straight nail 100. The overall length of the U-shaped nail 200 is available in five specifications: 6 mm, 8 mm, 10 mm, 13 mm, and 22 mm. The overall width (i.e., the distance between the two ends of the U-shape) of these five types of U-shaped nails 200 is consistent, as is the curvature of the bent portion.

[0052] Figure 1 and Figure 2 These are, respectively, a perspective view and an exploded view of the nozzle unit in this embodiment.

[0053] like Figures 1-2 As shown, the nozzle unit 20 includes a nozzle body 21 and a straight nail limiting part 22. The nozzle body 21 receives nails from the nail magazine and temporarily stores the nails for firing. The straight nail limiting part 22 is used to limit and guide the temporarily stored straight nails so that they can be fired normally.

[0054] The nozzle body 21 includes a nozzle connecting plate 211, a nozzle cover plate 212, and multiple fasteners (screws).

[0055] Figure 3 and Figure 4 These are, respectively, a perspective view and a frontal projection view of the nozzle connecting plate in this embodiment.

[0056] like Figures 3-4 As shown, the nozzle connecting plate 211 is used to connect the nail magazine and the main body of the nail gun. It is plate-shaped overall, with one end in the longitudinal direction being wedge-shaped, which is the nail ejection end 211a. The other end in the longitudinal direction is the gun body connecting end 211b, and the width of the gun body connecting end 211b is greater than the width of the middle part of the nozzle connecting plate 211. In this embodiment, the nozzle connecting plate 211 is a one-piece molded part made of metal.

[0057] The nozzle connecting plate 211 has a nail outlet groove 2111, a straight nail outlet 2112, a U-shaped nail outlet 2113, a pair of nail magazine connecting holes 2114, three cover plate connecting holes 2115, and a pair of gun body connecting holes 2116.

[0058] The nail outlet groove 2111 is a strip-shaped square groove that extends and runs through the length of the nozzle connecting plate 211. The cross-section of its extension direction is rectangular and all dimensions are the same.

[0059] The straight nail access port 2112 is an irregularly shaped strip-shaped hole for the straight nail 100 to pass through. The straight nail access port 2112 is located in the middle of the bottom of the nail outlet groove 2111 and extends along the thickness direction of the nozzle connecting plate 211. The length direction of the straight nail access port 2112 is consistent with the extension direction of the nail outlet groove 2111. The straight nail access port 2112 includes multiple strip-shaped portions 2112a and multiple square portions 2112b alternately connected in sequence. The strip-shaped portions 2112a extend in the same direction and are on a uniform straight line. The square portions 2112b have consistent angles. The two ends of the strip-shaped portions 2112a are respectively connected to the middle of one end of two square portions 2112b. In this embodiment, there are five square portions 2112b, forming a straight nail access port 2112 that can cooperate with the nail cartridge to allow the passage of the five different length specifications of straight nails 100. Specifically, the head 102 of the shortest straight nail 100 (15mm) can pass through a square portion 2112b closest to the exit end 211a; the head 102 of the second shortest straight nail 100 (20mm) can pass through a second square portion 2112b closest to the exit end 211a, and its nail body 101 can pass through multiple strip portions 2112a and a square portion 2112b before the square portion 2112b, and so on.

[0060] The U-shaped pin insertion port 2113 is a U-shaped strip hole for passing through an arc-shaped U-shaped pin 200. The overall width of the U-shaped pin insertion port matches the U-shaped pin 200, and its overall length is slightly longer than the longest U-shaped pin 200 (22mm), thus allowing U-shaped pins 200 of five different lengths to pass through. The U-shaped pin insertion port 2113 is also located at the bottom of the pin ejection groove 2111, with its two ends located on both sides of the bottom of the groove. The width of the pin ejection groove 2111 corresponds to the overall width of the U-shaped pin 200. Therefore, the inserted U-shaped pin 200 can be limited by the two side walls of the pin ejection groove 2111, and during firing, the pin ejection groove 2111 can also guide the U-shaped pin 200, ensuring stable ejection.

[0061] The nail box connecting hole 2114 is used to connect the nail box. Both nail box connecting holes 2114 are countersunk holes, which are opened near the nail outlet end 211a and are located on both sides of the nail outlet groove 2111.

[0062] The cover plate connecting hole 2115 is used to connect the nozzle cover plate 212. All three cover plate connecting holes 2115 are circular through holes. Two of the cover plate connecting holes 2115 are located on both sides of the nail outlet groove 2111, and are close to the two nail magazine connecting holes 2114, and are closer to the middle of the length direction of the nozzle connecting plate 211 than the two nail magazine connecting holes 2114. The other cover plate connecting hole 2115 is opened on one side of the nail outlet groove 2111, and is closer to the gun body connecting end 211b.

[0063] The gun body connection hole 2116 is used to connect the main body of the nail gun. Both gun body connection holes 2116 are circular through holes, which are opened at the corners of the gun body connection end 211b and are located on both sides of the nail outlet groove 2111.

[0064] Figure 5 This is a perspective view of the nozzle cover in this embodiment.

[0065] like Figure 5 As shown, the nozzle cover 212 is generally plate-shaped, with one end wedge-shaped and the other end square. Its shape is basically consistent with the shape of the protruding end 211a and the middle part of the nozzle connecting plate 211. The nozzle cover 212 has two clearance grooves 2121, a cover mounting hole 2122, and a mounting notch 2123. In this embodiment, the nozzle cover 212 is also a metal part.

[0066] The clearance groove 2121 is used to cooperate with the limiting member in the straight nail limiting part 22. The structure of the limiting member will be described in more detail below. The clearance groove 2121 is a strip-shaped square groove, which is provided on one surface of the nozzle cover plate 212 in the thickness direction. Its extension direction is consistent with the length direction of the nozzle cover plate 212, that is, the two clearance grooves 2121 are parallel to each other. The two clearance grooves 2121 are provided close to each other in the middle of the width direction of the nozzle cover plate 212, and their positions are slightly offset to one side of the width direction of the nozzle cover plate 212. The distance between the two clearance grooves 2121 is less than the overall width of the U-shaped nail 200 and slightly larger than the diameter of the nail head 102 of the straight nail 100.

[0067] The cover plate mounting holes 2122 are used to connect the nozzle connecting plate 211. Both cover plate mounting holes 2122 are countersunk holes, and are located on both sides of the two clearance grooves 2121, and in the middle of the length direction of the nozzle cover plate 212.

[0068] The mounting notch 2123 is formed at one square end of the nozzle cover plate 212. The mounting notch 2123 is actually part of the countersunk hole structure and is also used to connect the nozzle connecting plate 211.

[0069] By fitting the surface of the nozzle cover plate 212 with the relief groove 2121 to the surface of the nozzle connecting plate 211 with the nail outlet groove 2111, aligning the edges, and then installing fasteners, the two can be combined into one unit. After assembly, the relief groove 2121 and the nail outlet groove 2111 are connected.

[0070] The straight nail limiting part 22 includes a connecting seat 221, two limiting members 222, two return springs 223, two balls 224, and multiple connecting members (screws).

[0071] Figure 6 and Figure 7These are two perspective views of the connector from different angles in this embodiment.

[0072] like Figures 6-7 As shown, the connector 221 includes a connector body 2211 and a connector fixing part 2212. In this embodiment, the connector 221 is a one-piece molded part made of metal.

[0073] The main body 2211 of the connector includes three limiting member connecting plates 22111 and a connecting block 22113.

[0074] All three limiting member connecting plates 22111 are plate-shaped, with one of them being relatively thinner. All three limiting member connecting plates 22111 are connected to the connecting block 22113, and the faces of the three limiting member connecting plates 22111 are parallel to each other, with equal spacing between adjacent plates. Two limiting member mounting grooves 22111a are formed between adjacent plates. The spacing between the two limiting member mounting grooves 22111a corresponds to the arrangement of the two clearance grooves 2121 on the nozzle cover plate 212.

[0075] The limiting member connecting plate 22111 is also provided with a first connecting hole 22111b and a second connecting hole 22111c, both of which are circular through holes and communicate with the limiting member mounting groove 22111a. The first connecting hole 22111b is used to connect the limiting member 222, and the second connecting hole 22111c is used to install a screw that limits the rotation of the limiting member 222.

[0076] Two spring receiving grooves 22113a are also formed between the connecting block 22113 and the limiting member connecting plate 22111. The spring receiving grooves 22113a are roughly cylindrical grooves used to set the reset spring 223 and the ball 224.

[0077] The connecting seat fixing part 2212 is square plate-shaped, with two connecting seat fixing parts 2212 extending from both sides of the connecting seat main body 2211, and the two connecting seat fixing parts 2212 are coplanar. A connecting seat fixing hole 2212a, which is a circular through hole, is provided on the connecting seat fixing part 2212 for fixing the connecting seat 221 to the nozzle connecting plate 211. The extending direction of the spring receiving groove 22113a is perpendicular to the surface direction of the connecting seat fixing part 2212.

[0078] Figure 8 This is a perspective view of the limiting component in this embodiment.

[0079] like Figure 8 As shown, the limiting member 222 (spacer) is a strip-shaped piece made of metal, including a limiting member connecting part 2221 and a limiting member main body part 2222.

[0080] The main body 2222 of the limiting member is strip-shaped, with one end connected to the connecting part 2221. The main body 2222 of the limiting member includes a first extension 22221 and a second extension 22222, the two segments being of similar length, and the second extension 22222 being slightly inclined relative to the first extension 22221, with an obtuse angle between the extension directions of the two segments. The end of the second extension 22222 is an extension end 2222a, which is wedge-shaped.

[0081] The limiting member connecting portion 2221 is used to connect the limiting member 222 to the connecting seat 221. The limiting member connecting portion 2221 is hook-shaped, and its end away from the limiting member main body portion 2222 is the limiting end 2221a. The limiting member connecting portion 2221 has a limiting member mounting hole 2221b, which is a circular through hole. Therefore, the limiting member connecting portion 2221 can be rotatably installed in the limiting member mounting groove 22111a via the connecting member, and its rotation is limited by the screw installed in the second connecting hole 22111c.

[0082] The return spring 223 and the ball 224 are disposed in the spring receiving groove 22113a. The two ends of the return spring 223 abut against the bottom of the spring receiving groove 22113a and the ball 224, respectively. The ball 224 further abuts against one end of the limiting member 222 in the width direction.

[0083] Figure 9 This is an orthographic projection of the nozzle unit structure in this embodiment. To show the correspondence between the straight nail limiting part and the receiving port on the nozzle connecting plate, Figure 9 The nozzle cover is not shown.

[0084] Figure 10 This is a cross-sectional view of the nozzle unit structure in this embodiment. Figure 10 The nozzle connecting plate is not shown.

[0085] Figure 11 This is a cross-sectional view of the nozzle unit in this embodiment.

[0086] like Figures 9-11 As shown, when assembled as a whole, the two limiting members 222 are parallel to each other, and their main bodies 2222 are accommodated in the nail outlet groove 2111. The distance between the two limiting members 222 is much smaller than the overall width of the U-shaped nail outlet 2113, and approximately equal to the width of the square portion 2112b of the straight nail outlet 2112. This is equivalent to forming a guide groove between the two limiting members 222 for limiting and guiding the straight nail 100, which is aligned with and connected to the straight nail outlet 2112.

[0087] In the initial state (without nails inserted), under the action of the return spring 223, the limiting member 222 is pressed down toward the nozzle connecting plate 221, and its extended end 2222a abuts against the bottom of the nail outlet groove 2111, and the first extension section 22221 is partially accommodated in the corresponding clearance groove 2121.

[0088] When the straight nail 100 is loaded, it directly enters the guide groove between the two limiting members 222. When the straight nail 100 is fired, the firing pin enters the nail ejection groove 2111 from the gun body connection end 211b and strikes the straight nail 100. At this time, the firing pin pushes the two limiting members 222 slightly upward. However, since the second extension 22222 of the limiting member 222 is inclined relative to the first extension 22221, most of the second extension 22222 is still located in the nail ejection groove 2111, and the straight nail 100 can still be limited and guided.

[0089] When the U-shaped nail 200 is inserted, since the two limiting members 222 are located at the center of the width direction of the U-shaped nail 200, the U-shaped nail 200 pushes the two limiting members 222 into the clearance groove 2121. The limiting member 222 is a metal sheet with a certain degree of elasticity. Under the push of the U-shaped nail 200, the included angle between the first extension 22221 and the second extension 22222 further increases, and the second extension 22222 is also pushed into the clearance groove 2121. Therefore, the limiting member 222 does not affect the firing of the U-shaped nail 200. Since the width of the nail ejection groove 2111 corresponds to the overall width of the U-shaped nail 200, the two side walls of the nail ejection groove 2111 can limit and guide it when the U-shaped nail 200 is fired.

[0090] The nail magazine's ejection end is connected to the other side of the nozzle connecting plate 211 of the nozzle unit 20 (the side without the nail ejection groove 2111). The nail track of the nail magazine is aligned and connected with the corresponding receiving port on the nozzle connecting plate 211, thereby enabling the nail in the nail track to be fed into the nail ejection groove 2111. The nail magazine can be a nail magazine for holding straight nails or a nail magazine for holding U-shaped nails. When it is necessary to perform nailing tasks with both types of nails sequentially, the nail magazine can be removed and replaced, so that the same nail gun can be used for both straight and U-shaped nails, eliminating the need to equip multiple nail guns and requiring only the two types of nail magazines.

[0091] Preferably, a dual-purpose nail magazine for use with the above-described nozzle unit 20 is shown below.

[0092] Figure 12 and Figure 13 These are, respectively, a perspective view and an exploded view of the dual-purpose nail box in this embodiment.

[0093] like Figures 12-13As shown, the dual-purpose nail magazine 10 includes a nail-receiving section 11 and a nail-pushing section 12. The nail-receiving section 11 is used to receive a row of nails, and the nail-pushing section 12 is used to push the row of nails in the nail-receiving section 11 toward the end of the nail-receiving section 11, thereby feeding the nails sequentially to the nozzle unit 20.

[0094] The nail receiving part 11 includes a first nail receiving member 111, a second nail receiving member 112, a third nail receiving member 113, an insert 114, and a base member 115.

[0095] Figure 14 This is a perspective view of the first nail-receiving component in this embodiment.

[0096] like Figure 14 As shown, the first nail-receiving member 111 is generally strip-shaped, and its cross-section along its length is approximately U-shaped. The first nail-receiving member 111 includes a first main body 1111, an elastic member receiving portion 1112, a first extension portion 1113, and a second extension portion 1114.

[0097] The cross-section of the first main body 1111 is U-shaped.

[0098] The elastic element receiving portion 1112 is a hollow square rod shape with a strip-shaped opening on one side. The two ends of this opening are connected to the end of the first main body portion 1111 and the end of the first extension portion 1113, respectively. The elastic element receiving portion 1112 has an elastic element receiving hole 1112a extending along its length and passing through it. The elastic element receiving hole 1112a is a square through hole with rounded corners. One end of the elastic element receiving portion 1112 along its length also has a blocking connection hole 1112c and an observation notch 1112d.

[0099] The first extension 1113 is generally square plate-shaped. A component receiving groove 1115 is formed between the first main body 1111 and the two first extensions 1113, and the bottom of the component receiving groove 1115 is arc-shaped. The elastic member receiving hole 1112a communicates with the component receiving groove 1115 through an opening on one side of the elastic member receiving portion 1112, and a pusher guide groove for guiding the pusher portion 12 is formed at the opening.

[0100] Both second extensions 1114 are square plates, extending further perpendicularly from the ends of the two first extensions 1113 that are away from the first main body 1111, and the two second extensions 1114 extend in opposite directions.

[0101] The first nail-receiving component 111 also has a pair of first base connection holes 1116 located at its end, and three first fixing holes 1117 arranged along its length, all of which are circular through holes, used to connect the base component 115 and other nail-receiving components respectively.

[0102] Figure 15 This is a perspective view of the second nail-receiving component in this embodiment.

[0103] like Figure 15 As shown, the second nail-receiving member 112 is generally strip-shaped, with the same length as the first nail-receiving member 111, and a width less than the groove depth of the member receiving groove 1115. The second nail-receiving member 112 includes a second main body 1121, a plurality of second strip-shaped protrusions 1122, and a second block-shaped protrusion 1123.

[0104] The second main body portion 1121 is in the shape of a square plate. A plurality of second strip-shaped protrusions 1122 are formed parallel to each other on one surface of the second main body portion 1121 in the thickness direction and are arranged sequentially along the width direction of the second main body portion 1121. A square strip-shaped second groove 1122a is formed between two adjacent second strip-shaped protrusions 1122. A second block-shaped protrusion 1123 is formed on another surface of the second main body portion 1121 in the thickness direction and is located on one side of the second main body portion 1121 in the width direction.

[0105] The second nail receiving member 112 also has a second base connecting hole 1126 at its end and three second fixing holes 1127 arranged along its length, all of which are circular through holes. Their arrangement is consistent with the arrangement of the first base connecting hole 1116 and the first fixing hole 1117 on the first nail member 111. Therefore, the first nail member 111 and the second nail receiving member 112 can be fixedly connected by screws.

[0106] Figure 16 This is a perspective view of the third nail-receiving component in this embodiment.

[0107] like Figure 16 As shown, the third nail-receiving member 113 is generally strip-shaped, with a length shorter than that of the first nail-receiving member 111, and its cross-section along its length is approximately T-shaped. The third nail-receiving member 113 includes a fitting and fixing part 1131, a third main body part 1132, a plurality of third strip-shaped protrusions 1133, a third block-shaped protrusion 1134, and a third extension part 1135.

[0108] The third main body 1132 is generally square plate-shaped. The middle part of the fitting and fixing part 1131 is connected to one end of the third main body 1132 in the width direction. Multiple hook-shaped structures are formed on both sides of the third main body 1132 in the thickness direction. Two component end fitting grooves 1131a and a strip fitting groove 1131b are formed on the inner side of the hook-shaped structures. Both are square grooves and extend along the length direction of the third accommodating member 113. The openings of the two component end fitting grooves 1131a are opposite each other, and the two second extensions 1114 of the first accommodating member 111 can be respectively fitted into the two component end fitting grooves 1131a. In addition, the fitting and fixing part 1131 also has a pair of nozzle connecting holes 1131c, which are opened at the two corners away from the third main body 1132. The nozzle connecting holes 1131c are through the fitting and fixing part 1131 in the length direction.

[0109] Multiple third strip-shaped protrusions 1133 are formed parallel to each other on one surface of the third main body portion 1132 in the thickness direction and are arranged sequentially along the width direction of the third main body portion 1132. A square strip-shaped third groove 1133a is formed between two adjacent third strip-shaped protrusions 1133. The shape, size and arrangement of the multiple third strip-shaped protrusions 1133 correspond to the multiple second strip-shaped protrusions 1122 of the second rivet member 112. A third block-shaped protrusion 1134 is formed on another surface of the third main body portion 1132 in the thickness direction and is located on one side of the width direction of the third main body portion 1132.

[0110] The third extension 1135 extends from the other end of the third main body 1132 in the width direction and forms a hook shape, so that the end of the third nail receiving member 113 with the third extension 1135 (i.e. the end of the third nail receiving member 113 in the width direction) is semi-cylindrical.

[0111] The strip 114 is rectangular and fits into the strip fitting groove 1131b. The two end faces of the strip 114 are flush with the two end faces of the third nail receiving member 113.

[0112] The base member 115 has a component mounting groove 1151 that matches the cross-sectional shape of the first nail receiving member 111 and a plurality of connecting holes communicating with the component mounting groove 1151.

[0113] The third nail-receiving component 113 is shorter than the first nail-receiving component 111. When the two are assembled, one end in the longitudinal direction is aligned and used to connect the nozzle unit 20. The other end in the longitudinal direction is fitted into the component mounting groove 1151 of the base component 115, and fasteners can be provided to fix the base component 115 and the first nail-receiving component 111 together. After the nozzle unit 20 is further installed, the third nail-receiving component 113 is confined between the nozzle unit 20 and the base component 115.

[0114] Figure 17 This is an orthographic projection of the three nail-receiving components in this embodiment.

[0115] like Figure 17 As shown, at this time, the second nail receiving member 112 is located in the member receiving groove 1115, and its second block-shaped protrusion 1123 is in contact with the inner wall of the first extension 1113 (that is, the side wall of the member receiving groove 1115); the third main body 1132 and the third extension 1135 of the third nail receiving member 113 are accommodated in the member receiving groove 1115, and its third block-shaped protrusion 1134 is in contact with the inner wall of the other first extension 1113.

[0116] The surfaces of the second nail receiving member 112 and the third nail receiving member 113, which have strip-shaped protrusions, face each other, and a straight nail channel 117 for receiving the straight nail 100 is formed between these two surfaces. The cross-sectional shape of the straight nail channel 117 is substantially the same as the shape of the straight nail receiving port 2112.

[0117] A U-shaped nail channel 118 for accommodating U-shaped nails is formed between the surfaces of the second nail receiving member 112 and the third nail receiving member 113 that do not have strip-shaped protrusions and the sidewall of the member receiving groove 1115. The cross-sectional opening of the U-shaped nail channel 118 is substantially consistent with the shape of the U-shaped nail receiving port 2113, and the relative positions of the U-shaped nail channel 118 and the straight nail channel 117 also correspond to the relative positions of the U-shaped nail receiving port 2113 and the straight nail receiving port 2112.

[0118] Furthermore, a pusher passage 119 for moving the pusher is formed between the inner side of the third extension 1135 of the third nail receiving member 113 and one end of the second nail receiving member 112 in the width direction. The pusher passage 119 connects the straight nail channel 117 and the U-shaped nail channel 118.

[0119] Figure 18 This is a perspective view of the dual-purpose nail box structure in this embodiment.

[0120] like Figure 18 As shown, the pusher part 12 includes a first pusher 121, a second pusher 122, an elastic member 123, and a connecting pin 124.

[0121] Figure 19 This is a perspective view of the first pusher in this embodiment.

[0122] like Figure 19 As shown, the first pusher 121 includes a first pusher body 1211, a first connecting piece 1212, an elastic connecting piece 1213, and a guide piece 1214.

[0123] The cross-section of the first pusher nail body 1211 is U-shaped. The first pusher nail body 1211 has a first hole 1211a and two second holes 1211b. The first hole 1211a is located in the curved portion of the first pusher nail body 1211, and the two second holes 1211b are respectively located at the two ends of the first pusher nail body 1211.

[0124] Two first connecting pieces 1212 extend from opposite ends of the first pusher body 1211. The first connecting pieces 1212 are rectangular pieces, and their surface direction is approximately perpendicular to the surface direction of the end of the first pusher body 1211.

[0125] The elastic connecting piece 1213 is square in shape and extends from one end of the first hole 1211a toward the inside of the first push pin body 1211.

[0126] Both guide plate portions 1214 are square plates, extending opposite each other from one end of the two second hole portions 1211b toward the outside of the first push pin main body portion 1211.

[0127] Figure 20 This is a perspective view of the second pusher in this embodiment.

[0128] like Figure 20 As shown, the second pusher 122 includes a second pusher body 1221 and a second connecting piece 1222.

[0129] The second pusher body 1221 is plate-shaped, and one end of its width direction has a plurality of pusher protrusions 1221a, which are arranged sequentially along the length direction of the second pusher body 1221. The size and arrangement of the plurality of pusher protrusions 1221a correspond to the size and arrangement of the plurality of second strip protrusions 1122 of the second nail receiving member 112.

[0130] One end of the second connecting piece 1222 in the width direction is connected to the other end of the second pusher body 1221, and the surface direction of the second connecting piece 1222 is perpendicular to the surface direction of the second pusher body 1221.

[0131] The first connecting piece 1212 of the first pusher 121 and the second connecting piece 1222 of the second pusher 122 are fixedly connected together (e.g., welded together) to form an integral pusher block.

[0132] Figure 21 This is a frontal projection of the dual-purpose nail box in this embodiment.

[0133] like Figure 21As shown, the first pusher body 1211 of the first pusher member 121 is housed in the U-shaped nail channel 118, and its two elastic connecting pieces 1213 and two guide pieces 1214 are respectively housed in two elastic receiving holes 1112a.

[0134] The second pusher body 1221 of the second pusher 122 is housed within the straight nail channel 117, and one end of it having a pusher protrusion 1221a faces the nozzle.

[0135] The first connecting piece 1212 of the first pusher 121 and the second connecting piece 1222 of the second pusher 122 are accommodated in the pusher passage 119.

[0136] Spring 123 is a compression spring, which is housed in the elastic element receiving hole 1112a. One end of spring 123 is connected to the elastic element connecting piece 1213 of the first push pin 121 by a connecting pin 124, and the other end abuts against the screw at the first base connecting hole 1116.

[0137] Therefore, under the force of spring 123, the nail pusher pushes the nail pack towards the nozzle unit 20, which pushes the straight nails 100 or U-shaped nails 200 in the dual-purpose nail magazine 10 into the nail outlet slots 2111 of the nozzle unit 20 through the corresponding receiving ports. In this way, there is no need to equip multiple nail magazines. When nailing tasks that require two types of nails to be performed one after the other, it is only necessary to replace the nail pack in the dual-purpose nail magazine 10, making it more convenient to carry and use.

[0138] In this embodiment, the parts not described in detail are well-known technologies in the art.

[0139] Functions and effects of the embodiments

[0140] According to the nozzle unit 20 and nail gun provided in this embodiment, which are suitable for straight nails and U-shaped nails, there are nozzle body 21 and nail limiting part 22. The nozzle body 21 has a U-shaped nail receiving port 2113 for U-shaped nails 200 to pass through and a straight nail receiving port 2112 for straight nails 100 to pass through. The straight nail receiving port 2112 is located inside the U-shaped nail receiving port 2113. That is, the two types of nails each have independent and separate receiving ports. Therefore, the nozzle unit 20 can receive straight nails or U-shaped nails from the nail cartridge. Even if the wire diameter of the two types of nails is large, the corresponding type of nail can be well received through the separate receiving ports, and it is not easy for the nail to be ejected unsmoothly or stuck. Furthermore, since it also has a straight nail limiting part 22, it can limit the straight nail 100 inserted into the nail outlet groove 2111. Therefore, it solves the problem that the straight nail 100 may not be properly limited and guided due to the wide nail outlet groove 100, and may not be able to be ejected normally. This allows the same nail gun to fire straight nails and U-shaped nails normally, without the need to use multiple nail guns. It is more convenient to carry and use, and can also reduce equipment costs.

[0141] In this embodiment, the nozzle body 21 has two clearance grooves 2121 communicating with the nail ejection groove 2111. The straight nail limiting part 22 includes two limiting members 222 rotatably connected to the nozzle body 21 and a return spring 223 that presses down the limiting members 222. The inserted straight nail 100 can directly enter between the two limiting members 222, thereby achieving limiting and guiding. The inserted U-shaped nail 200 can push the limiting members 222 upward into the clearance grooves 2121, thus remaining unaffected. At the same time, the groove width of the nail ejection groove 2111 is adapted to the overall width of the U-shaped nail 200, and the two side walls of the nail ejection groove 2111 can limit and guide the U-shaped nail 200. Therefore, both types of nails can be limited and guided, and are less prone to positional deviation or skew during firing, thereby avoiding the phenomenon of uneven nail ejection and nail jamming.

[0142] Furthermore, since the limiting member 222 is not completely straight, but has a first extension 22221 and a second extension 22222 that are obtuse angles to each other, when the firing pin enters the nail ejection groove 2111 to impact the straight nail 100, the limiting member 222 will not be completely pushed into the clearance groove 2121. The downwardly tilted second extension 22222 can still limit and guide the straight nail 100, thereby further ensuring that no nail jamming occurs when the straight nail 100 is fired.

[0143] Furthermore, the return spring 223 is housed in the spring receiving groove 22113a of the connecting seat 221 and abuts against the limiting member 222 through the ball 224. Therefore, the return spring 223 is not easily affected by the working environment, and the contact area of ​​the return structure is small, resulting in less wear. Thus, the service life of the nozzle unit 20 is longer.

[0144] In this embodiment, the nozzle body 21 is formed by combining a nozzle connecting plate 211 and a nozzle cover plate 212, which are fixed by three screws. The nail outlet groove 2111 is formed on one surface of the nozzle connecting plate 211, and the clearance groove 2121 is formed on one surface of the nozzle cover plate 212. Therefore, the parts are easier to process, and the nozzle body 21 can be easily disassembled and assembled, making it convenient to inspect the internal nail outlet groove 2111 and other parts.

[0145] In this embodiment, the nozzle unit 20 is used in conjunction with the dual-purpose nail magazine 10. The dual-purpose nail magazine 10 has a U-shaped nail channel 118 for accommodating U-shaped nails 200 and a straight nail channel 117 for accommodating straight nails 100. It can store two types of nails and push the nails into the nail outlet slot 2111 through the corresponding receiving port. Therefore, when used with the dual-purpose nail magazine 10, it is not necessary to use multiple nail guns or multiple nail magazines. When it is necessary to switch the type of nails to be used, it is only necessary to replace the row of nails in the dual-purpose nail magazine 10, making it more convenient to carry and use. In addition, since the U-shaped nail channel 118 and the straight nail channel 117 are also designed to be independent and separate from each other, the dual-purpose nail magazine 10 can also be well adapted to two types of nails with large differences in wire diameter.

[0146] <Variation Example>

[0147] Figure 21 This is a frontal projection of the nozzle connecting plate in this modified example.

[0148] Figure 22 This is a schematic diagram of the U-shaped nail in this variation.

[0149] like Figures 21-22 As shown, this modified example provides a nozzle unit. The difference from the embodiment is that this nozzle unit is applicable to the above-mentioned straight nail 100 and U-shaped nail 200'.

[0150] The U-shaped nail 200' has two bends, forming a square frame shape, with the two bends approximately forming right angles. Correspondingly, the cross-section of the U-shaped nail access port 2113' on the nozzle connecting plate 211' of the nozzle unit in this modified example is a right-angled U-shape.

[0151] If used in conjunction with the preferred dual-purpose nail box 10, the U-shaped nail track 118 in the dual-purpose nail box 10 also needs to be modified accordingly so that the cross-section is a right-angled U-shape.

[0152] In this modified example, the other structures and functions are the same as in the embodiment, so they will not be described again.

[0153] The above embodiments are only used to illustrate specific implementations of the present invention, and the present invention is not limited to the scope of the description of the above embodiments.

[0154] In the above embodiment, the wire diameter of the U-shaped nail 200 is 0.6mm and the overall length is 6-22mm. The size of the U-shaped nail access port 2113 is matched accordingly. In alternative solutions, the U-shaped nail can also be of other sizes, and the size of the U-shaped nail access port 2113 can be matched accordingly, which can also achieve the corresponding technical effect.

[0155] In the above embodiment, the straight nail 100 has a wire diameter of 1.05mm and five different lengths. The size of the straight nail access port 2112 matches the length of the nail and has five alternating strip sections 2112a and five square sections 2112b connected in sequence. In an alternative embodiment, the straight nail 100 can also be of other sizes, with the size of the straight nail access port 2112 matching the length of the nail. The number of strip sections 2112a and square sections 2112b can also be set accordingly, achieving the same technical effect.

Claims

1. A nozzle unit suitable for straight nails and U-shaped nails, disposed in a nail gun, characterized in that, include: The main body of the nozzle and the straight nail limiting part, The nozzle body has the following features: The U-shaped nail access opening is designed for U-shaped nails to pass through. A straight nail access port is located inside the U-shaped nail access port and is used for straight nails to pass through; The nail outlet groove communicates with the U-shaped nail receiving port and the straight nail receiving port, and is used to accommodate the straight nail or the U-shaped nail to be fired. The straight nail limiting part is used to limit the straight nail in the nail outlet groove. The straight nail limiting part includes: Connecting seat, connected to the nozzle body; and Two limiting members are rotatably connected at one end to the connecting seat, and their middle and other ends are disposed in the nail outlet groove. The extending direction of the limiting members is consistent with the extending direction of the nail outlet groove. A guide groove communicating with the straight nail receiving port is formed between the two limiting members for limiting and guiding the straight nail. The limiting member is in the shape of a strip. The connector has: Two limiting member mounting slots, one end of each of the two limiting members being rotatably connected to the two limiting member mounting slots; and Two spring receiving slots, which are cylindrical slots, are formed in two limiting member mounting slots, respectively. The straight nail limiting part also includes two return springs, which are respectively accommodated in the two spring receiving grooves. One end of the return spring abuts against the bottom of the spring receiving groove, and the other end abuts against the limiting member.

2. The nozzle unit for straight nails and U-shaped nails according to claim 1, characterized in that: in, The distance between the two limiting members corresponds to the width of the straight nail and is less than the overall width of the U-shaped nail. The width of the nail groove corresponds to the overall width of the U-shaped nail. The two limiting members are located at the middle of the width direction of the nail outlet groove.

3. The nozzle unit for straight nails and U-shaped nails according to claim 1, characterized in that: in, The nozzle body also has two strip-shaped clearance grooves, the positions of which correspond to the two limiting members. One side of the nail outlet groove is connected to the U-shaped nail insertion port and the straight nail insertion port, and the other side opposite to this side is connected to the clearance groove.

4. The nozzle unit suitable for straight nails and U-shaped nails according to claim 3, Its features are: The nozzle body includes: A nozzle connecting plate for connecting a nail cartridge, wherein the U-shaped nail extraction port and the straight nail extraction port are disposed on the nozzle connecting plate, and the nail dispensing groove is disposed on one side of the nozzle connecting plate; and A nozzle cover plate is detachably connected to the nozzle connecting plate, and the clearance groove is provided on the side of the nozzle cover plate that is connected to the nozzle connecting plate.

5. The nozzle unit for straight nails and U-shaped nails according to claim 1, characterized in that: in, The surface direction of the limiting member is parallel to the through direction of the straight nail connection opening. The straight nail limiting part also includes two ball bearings, which are respectively accommodated in the two spring receiving grooves. The other end of the reset spring abuts against one end of the limiting member in the width direction via a ball bearing.

6. The nozzle unit applicable to straight nails and U-shaped nails according to claim 1, Its features are: The limiting member includes: The limiting member connecting part is rotatably connected to the connecting seat; and The main body of the limiting member is strip-shaped, with one end connected to the connecting part of the limiting member, and the main body of the limiting member is accommodated in the nail outlet groove. The main body of the limiting member includes: The first extension section has one end connected to the connecting part of the limiting member; and The second extension segment has one end connected to the other end of the first extension segment, and the angle between the extension direction of the second extension segment and the extension direction of the first extension segment is an obtuse angle.

7. The nozzle unit for straight nails and U-shaped nails according to claim 1, characterized in that: in, The straight nail receiving port includes multiple strip-shaped sections and multiple square sections connected alternately in sequence, for allowing straight nails of different lengths to pass through. The cross-section of the U-shaped receiving port is either an arc-shaped U or a right-angled U.

8. A nail gun, characterized in that, include: The nozzle unit is used to fire nails; as well as The nail magazine is used to store the nails in a row and to feed the nails from the row to the nozzle unit in sequence. The nozzle unit is the nozzle unit applicable to straight nails and U-shaped nails as described in any one of claims 1-7.

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