Fastener driving device

Abstract

The invention provides a fastener driving device, and particularly relates to a nail gun which comprises a stock bin, a firing pin and a nose piece assembly, the nose piece assembly comprises a gun nozzle and a gun nozzle cover plate, the gun nozzle cover plate is connected to the gun nozzle and can rotate between a closing position and an opening position, a latch assembly is arranged on the gun nozzle cover plate in a pivoted mode, and the latch assembly is connected with the gun nozzle cover plate in a pivoted mode. The gun nozzle is provided with a binding face making contact with the stock bin, the gun nozzle is manufactured through the powder metallurgy technology, the clamping hook part is arranged on the first side, facing the gun nozzle cover plate, of the gun nozzle, at least one of the gun nozzle and the gun nozzle cover plate is manufactured through the powder metallurgy technology, and the channel is formed through the powder metallurgy technology. According to the gun nozzle of the fastener driving device, the powder metallurgy technology is adopted, the cost is low, the period is short, meanwhile, the fastener driving device is not prone to nail clamping, and when nail clamping occurs, nail clamping is convenient to clean.

Description

TECHNICAL FIELD

[0001] The present application relates to a fastener driving device, in particular to a nail gun for impacting fasteners. BACKGROUND

[0002] Since the nails used in the nail guns on the market are manufactured by different brands, the nails of different brands have deviations, and the manufacturing and assembly of the parts of the nail gun tool itself also have errors, so that the nail gun inevitably has the phenomenon of nail jamming when used, and therefore a simple and convenient nail jamming cleaning quick release structure is the mainstream trend of the nail gun.

[0003] The existing nail gun has a gun nozzle and a cover plate with quick nail jamming cleaning, which has two types: one is an integrated cast steel nozzle, which can be opened to quickly clean the jammed nails when the jammed nails occur, but the cast steel nozzle has a long manufacturing cycle and high cost; the other is a split type nozzle, which is split into two parts, one part is fixedly connected with a nail magazine, and the other part is connected with another movable nail magazine, when the jammed nails occur, the movable nail magazine is opened, and the nozzle is split into two parts for cleaning the nails. However, the visibility of nail jamming cleaning is poor, the space is narrow, and the operation is not convenient, and the split type nozzle is more likely to jam.

[0004] For the integrated cast steel nozzle, the blank of the cast steel part has a complex forming process, basically from the mold to the finished product processing, which takes more than 1.5-2 months, and each time after the mold is opened, the sample manufacturing cycle takes more than 1 month, which is particularly long. Moreover, the blank yield is affected by the environment, materials, and wax mold, and the blank working hours are complex, and the precision of the cast steel blank is very low after forming, many such as nail grooves, striker grooves, and matching surfaces require many machining processes, and the cost is very high.

[0005] For the split type nozzle, the nozzle is split into two parts, and the nails need to be cleaned under the nozzle after jamming, the space is narrow, and the visibility and operability are not convenient. Moreover, the manufacturing precision of the parts is high, and the assembly precision is also high, which increases the cost. Since the two parts of the split type have different processes and machining and assembly fixtures, there is inevitable manufacturing and assembly cumulative deviation, which makes the precision of the whole nozzle and nail magazine not high, and the nail jamming is easy to occur. SUMMARY

[0006] Therefore, the present application provides a fastener driving device to solve the problems of high cost, long manufacturing cycle, and inconvenient nail jamming cleaning of the traditional nail gun.

[0007] The present application provides a fastener driving device, comprising:

[0008] a body;

[0009] a magazine for storing fasteners;

[0010] a firing pin for driving the fastener in motion;

[0011] a nosepiece assembly coupled to the body, the nosepiece assembly comprising a gun barrel and a gun barrel cover oppositely arranged, a channel being formed between the gun barrel and the gun barrel cover, the channel being configured to receive the fastener driven by the firing pin from the hopper;

[0012] a latch assembly pivotally arranged on the gun barrel cover, a catch portion being arranged on the gun barrel, the latch assembly being operable to lock or unlock with the catch portion, the gun barrel cover being fastened with the gun barrel when the latch assembly is locked with the catch portion, the gun barrel cover being openable from the gun barrel when the latch assembly is unlocked with the catch portion, the catch portion being arranged on the gun barrel towards a first side of the gun barrel cover, a second side of the gun barrel facing away from the gun barrel cover being in contact with the hopper;

[0013] at least one of the gun barrel and the gun barrel cover being made by a powder metallurgy process, the channel being formed by the powder metallurgy process.

[0014] In one possible implementation, the first side is further provided with a protrusion, the gun barrel cover being pivotally coupled to the protrusion.

[0015] In one possible implementation, a height difference between the protrusion and the catch portion is not greater than 2mm.

[0016] In one possible implementation, a distance between the first side and the second side is not less than 4mm.

[0017] In one possible implementation, a distance between the second side and the abutting surface after machining is greater than 1.5mm, the second side being provided with a first surface and a second surface, the first surface being configured to mate with the hopper, the second surface being configured to mate with the body.

[0018] In one possible implementation, the gun barrel is of an integral structure or is formed by multiple pieces.

[0019] In one possible implementation, the gun barrel is detachably coupled to the body, the gun barrel being provided with a positioning hole, the body being provided with a positioning pin matching the positioning hole.

[0020] In one possible implementation, the gun barrel cover is provided with a third side opposite to the first side and a fourth side oppositely arranged to the third side, the fourth side being provided with a first boss, the latch assembly being pivotally coupled to the first boss, the third side being provided as a flat surface or a non-flat surface formed by machining the flat surface.

[0021] In one possible implementation, the material density of the nosepiece and / or the nosepiece cover is less than 7.5 g / cm 3 .

[0022] In one possible implementation, the nosepiece assembly further comprises a fixed seat, the fixed seat is fixedly connected with the nosepiece, and the nosepiece cover is pivotally connected with the fixed seat.

[0023] In one possible implementation, the fixed seat is made by a powder metallurgy process.

[0024] In one possible implementation, the nosepiece cover has a limiting portion, when the nosepiece cover is fully opened from the nosepiece, the limiting portion can limit the opening angle of the nosepiece cover relative to the nosepiece to be less than 80 degrees.

[0025] In one possible implementation, the second side has a protrusion for positioning the hopper, the protrusion is directly formed on the nosepiece by a powder metallurgy process.

[0026] The application also provides a fastener driving device, comprising:

[0027] a body;

[0028] a hopper for storing fasteners;

[0029] a firing pin for driving the fasteners to move;

[0030] a nosepiece assembly connected to the body, comprising oppositely arranged nosepiece and nosepiece cover, a channel is formed between the nosepiece and the nosepiece cover, the channel is used for receiving fasteners from the hopper driven by the firing pin;

[0031] a latch assembly is pivotally arranged on the nosepiece cover, a hook portion is arranged on the nosepiece, the latch assembly is operatively locked or unlocked with the hook portion, when the latch assembly is locked with the hook portion, the nosepiece cover and the nosepiece are fastened together, when the latch assembly is unlocked with the hook portion, the nosepiece cover can be opened from the nosepiece, the hook portion is arranged on the nosepiece towards the first side of the nosepiece cover, the second side of the nosepiece away from the nosepiece cover is in contact with the hopper;

[0032] at least one of the nosepiece and the nosepiece cover is made by a powder metallurgy process, the nosepiece has a fitting surface in contact with the hopper, the distance between the second side of the nosepiece away from the nosepiece cover and the fitting surface is less than 1.5 mm.

[0033] The fastener driving device provided by the application has a quick-release structure of the nail gun, the gun nozzle is manufactured by using a powder metallurgy process, and the manufacturing period is short and the cost is low. Since the powder metallurgy forming process is simple, the period can be shortened by at least half of the period of cast steel. Generally, the powder metallurgy has a period of only 0.5-1 month from the mold to the finished product, and the manufacturing period of each sample is only 5-10 days after the mold is opened, and the period is greatly shortened. Moreover, the powder metallurgy forming precision is high, and most of the features can be achieved basically by the mold forming precision, without the need for excessive machining processes, thereby greatly reducing the cost. In addition, the nail cleaning is convenient and convenient, the precision is higher, and the nail is not easy to be stuck. The powder metallurgy gun nozzle of the application is integrally formed by the powder metallurgy process, and the manufacturing errors of different tooling jigs of split parts are eliminated, and the assembly error is eliminated without the need for separate assembly, while meeting the powder metallurgy process, the quick-release is convenient, the period is short, the cost is low, the precision is high, and the nail is not easy to be stuck.

[0034] Other features and advantages of the application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0035] The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the application, and are incorporated herein for explanation. The illustrations in the drawings are used to explain the exemplary embodiments of the present application and their descriptions serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0036] Figure 1 A schematic diagram of the structure of a nail gun according to an embodiment of the application;

[0037] Figure 2 A schematic diagram of the partial explosion structure of a nail gun according to an embodiment of the application;

[0038] Figure 3 A schematic diagram of the structure of a latch assembly;

[0039] Figure 4 A schematic diagram of the two states of the gun nozzle cover plate being closed and opened;

[0040] Figure 5 A side view of the two states of the gun nozzle cover plate being closed and opened;

[0041] Figure 6 A front view of the structure of the gun nozzle;

[0042] Figure 7 A schematic diagram of the partial structure of a nail gun according to another embodiment of the application;

[0043] Figure 8 A schematic diagram of the partial explosion structure of a nail gun according to another embodiment of the application; Figure 7

[0044] Figure 9 ​A partial structure schematic diagram of a nail gun according to still another embodiment of the present application;

[0045] Figure 10 A partial exploded structure schematic diagram of a nail gun.

[0046] Figure 11 A partial structure schematic diagram of a nail gun according to still another embodiment of the present application;

[0047] BRIEF DESCRIPTION OF DRAWINGS

[0048] 100 - fastener driving device; 110 - body; 111, 112 - head housing; 120 - nosepiece assembly; 121, 125, 128 - nosepiece; 1211 - hook portion; 1212 - protrusion portion; 1213 - connecting hole; 1214 - positioning hole; 1215 - bolt; 1216 - positioning pin; 1217 - first side; 1218 - second side; 1219 - protrusion; 1210 - channel; 122, 126, 129 - nosepiece cover plate; 1221 - first boss; 1222 - second boss; 1223 - third side; 1224 - fourth side; 12 - latch assembly; 123 - pressing handle; 124 - pivot; 127 - fixing seat; 1281 - sunken portion; 1282 - first surface; 1283 - second surface; 130 - magazine; 131 - clamping portion; 140 - striker; 1220, 1290 - limiting portion. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. The embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0050] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, "inner" and "outer" refer to the inner and outer contours of the components themselves.

[0051] Furthermore, the terms "first", "second", etc. are used herein for descriptive purposes only and are not to be construed as indicating or implying relative importance or a quantity of indicated features. Thus, features defined with "first", "second" can explicitly or implicitly include at least one of the features.

[0052] Some embodiments of the present application provide a fastener driving device 100, in particular, a nail gun 100, referring to Figures 1-6 The nail gun 100 includes a body 110, a magazine 130, a striker 140, and a nosepiece assembly 120. The magazine 130 is configured to store fasteners and continuously feed the fasteners to the nosepiece assembly 120. The striker 140 is partially disposed in the body 110 and is configured to reciprocate between a top position and a firing position, and when the striker 140 is in the firing position, the striker 140 is configured to drive a fastener in the nosepiece assembly 120 to move, thereby shooting the fastener into a workpiece to achieve a fastening work. The body 110 includes a head housing 111, and the nosepiece assembly 120 is connected to the head housing 111 and configured to receive the driven fastener. The nosepiece assembly 120 includes a nosepiece 121 and a nosepiece cover plate 122, and a passage 1210 is formed between the nosepiece 121 and the nosepiece cover plate 122. The passage 1210 is configured to receive the striker 140 to move, and when the striker 140 moves into the passage 1210, the striker 140 is configured to drive the fastener from the magazine 130. In some embodiments, the striker passage 1210 is formed on the nosepiece 121. Alternatively, the striker passage 1210 can be formed on the nosepiece cover plate 122, or the striker passage 1210 can be partially formed on the nosepiece 121 and partially formed on the nosepiece cover plate 122.

[0053] As shown in Figure 2 and Figure 3 , the nosepiece cover plate 122 is pivotally provided with a latch assembly 12. The latch assembly 12 includes a pressing handle 123 and a pivot member 124. The pressing handle 123 is pivotally connected to the nosepiece cover plate 122, and the pivot member 124 is an elastic member such as a steel wire. The pivot member 124 is pivotally connected to the pressing handle 123. The nosepiece 121 is provided with a hook portion 1211. The pivot member 124 is operable to be locked or unlocked with the hook portion 1211. When the pivot member 124 is locked with the hook portion 1211, the nosepiece cover plate 122 is fastened with the nosepiece 121. When the pivot member 124 is unlocked with the hook portion 1211, the nosepiece cover plate 122 can be opened from the nosepiece 121. Referring to Figure 4 and Figure 5The solid line indicates the state where the nozzle cover 122 is fastened to the nozzle 121. At this time, the pressure handle 123 is in the downward state, maintaining the pivot 124 engaged in the notch of the hook portion 1211, and the nail gun 100 can nail normally. The dashed line indicates the state where the nozzle cover 122 can be opened from the nozzle 121. At this time, the pressure handle 123 is in the raised state, the pivot 124 can be disengaged from the hook portion 1211, and one end of the nozzle cover 122 can pivot around the nozzle 121 to open the channel. When nail jamming occurs, the nail removal work can be completed by opening the nozzle cover 122.

[0054] At least one of the nozzle 121 and the nozzle cover 122 is manufactured using powder metallurgy, and the channel 1210 is formed using powder metallurgy. Preferably, the channel 1210 is formed on one of the nozzle 121 and the nozzle cover 122, which are manufactured using powder metallurgy, thus reducing manufacturing costs. The powder metallurgy process includes powder injection molding. A hook portion 1211 is provided on a first side 1217 of the nozzle 121 facing the nozzle cover 122, and a flat surface is provided on a second side 1218 of the nozzle 121 facing away from the nozzle cover 122. Specifically, the second side 1218 of the nozzle 121 contacts the hopper 130, which is fixed to the nozzle 121 by screws. At this time, the second side 1218 of the nozzle 121 contacts the upper surface of the hopper 130. The nozzle 121 has a contact surface that contacts the hopper 130. Here, a flat surface is defined as the distance between the second side 1218 of the nozzle 121 and the contact surface being within 1.5mm. That is, due to manufacturing process or requirements for matching with the hopper, the flat surface may have a 1.5mm unevenness. The unevenness of the second side 1218 with these unevennesses still belongs to the flat surface defined in this application. That is, the distance between the second side 1218 of the nozzle 121, which is away from the nozzle cover plate 122, and the contact surface is less than 1.5mm.

[0055] The nozzle is made using powder metallurgy, which shortens the manufacturing cycle and reduces costs compared to traditional cast steel nozzles. It also offers high precision. The powder metallurgy process directly forms a structure that allows the nozzle cover to be opened, facilitating the removal of stuck nails. Due to its high precision and one-piece molding, it is less prone to nail jamming compared to split nozzles.

[0056] In some implementations, such as Figure 2 As shown, the hopper 130 is provided with a snap-fit ​​part 131. There are at least two snap-fit ​​parts 131 (one of which is not shown in the figure). The snap-fit ​​parts 131 are located at the top and bottom of the hopper and are used to fix the hopper 130 to the body 110 of the fastener drive device 100. The hopper 130 is a plastic hopper. The plastic hopper is connected to the nozzle 121 by screws. The plastic hopper is snapped to the housing by the snap-fit ​​part 131. Since the plastic hopper is weak and easily falls and is damaged, the snap-fit ​​at least two locations helps to improve the strength and prevent failure.

[0057] In some embodiments, the first side 1217 of the nozzle 121 is further provided with a protrusion 1212, and the nozzle cover plate 122 is pivotally connected to the protrusion 1212. In this way, when the pin is stuck, the nozzle cover plate is easily opened.

[0058] In some embodiments, referring to Figure 6 , the height difference between the protrusion 1212 and the hook portion 1211 is not greater than 2 mm, and preferably, the height difference between the protrusion 1212 and the hook portion 1211 is not greater than 1.5 mm. The distance between the hook portion 1211 and the abutting surface is defined as H1, and the distance between the protrusion 1212 and the abutting surface is defined as H2. That is, the difference between H1 and H2 is not greater than 2 mm, and preferably, not greater than 1.5 mm. In this way, the nozzle can be directly formed by powder metallurgy.

[0059] In some embodiments, referring to Figure 6 , the distance H between the first side 1217 and the second side 1218 of the nozzle (121, 125, 128) is not less than 4 mm. In this way, the strength of the nozzle can be effectively ensured, and the nozzle can be prevented from being damaged due to insufficient strength when falling.

[0060] In some embodiments, the nozzle 121 is an integral structure or is formed by splicing multiple pieces. The nozzle 121 is provided with a connecting hole 1213 and a positioning hole 1214. The connecting hole 1213 and the positioning hole 1214 are arranged at a position close to the head shell 111. Since there is a tolerance in bolt connection, a positioning pin is first used to position the nozzle 121. Specifically, the head shell 111 is provided with a positioning pin 1216 matched with the positioning hole 1214. The positioning pin 1216 passes through the positioning hole 1214 to position the nozzle 121 on the head shell 111. The bolt 1215 passes through the connecting hole 1213 to connect the nozzle 121 to the head shell 111. In this embodiment, the connecting hole 1213 and the positioning hole 1214 are respectively provided with two holes, which are symmetrically arranged on the nozzle along the driving axis of the striker. In this way, the connection precision of the nozzle 121 and the head shell 111 is improved, and the connection is firm. In other embodiments, the connecting hole 1213 is provided with two holes, and the positioning hole 1214 is provided with one hole. The number of the connecting hole 1213 and the positioning hole 1214 can be adjusted according to the installation requirements. Alternatively, when the bolt connection can meet the precision requirements, the positioning pin can not be arranged.

[0061] In some embodiments, the nozzle cover plate 122 is made by a powder metallurgy process.

[0062] In some embodiments, the nosepiece cover plate 122 has a third side 1223 opposite to the first side 1217 and a fourth side 1224 opposite to the third side 1223, the fourth side 1224 is provided with the first boss 1221 to which the latch assembly 12 is pivotally connected, and the third side 1223 is provided with a flat surface; the nosepiece cover plate 122 has a nosepiece cover plate contact surface in contact with the nosepiece 121, and the flat surface herein is defined as the distance between the third side 1223 of the nosepiece cover plate 122 and the nosepiece cover plate contact surface is within a range of 1.5 mm.

[0063] In some embodiments, the nosepiece cover plate 122 further comprises a second boss 1222 provided inside the protrusion 1212, and the nosepiece cover plate 122 is pivotally connected to the protrusion 1212 of the nosepiece 121 through the second boss 1222 to achieve the pivotal connection between the nosepiece cover plate 122 and the nosepiece 121.

[0064] In some embodiments, the height difference between the first boss 1221 and the second boss 1222 is not greater than 1.5 mm, i.e., the difference between the distance from the first boss 1221 to the nosepiece cover plate contact surface and the distance from the second boss 1222 to the nosepiece cover plate contact surface is not greater than 1.5 mm.

[0065] In some embodiments, the third side 1223 of the nosepiece cover plate 122 is formed with a groove through a powder metallurgy process or post-machining, so that the third side 1223 forms a non-flat surface with concave and convex shapes, the groove is matched with the shape of the striker to form a channel 1210 between the nosepiece cover plate 122 and the nosepiece 121 to accommodate the driven fastener, so that the striker 140 can reciprocate in the channel 1210. In other embodiments, the channel 1210 can also be formed in the first side 1217 of the nosepiece 121 through a powder metallurgy process or post-machining. Alternatively, the channel 1210 can be formed in both the third side 1223 of the nosepiece cover plate 122 and the first side 1217 of the nosepiece 121 through a powder metallurgy process or post-machining, as long as the accuracy and strength requirements are met to allow the striker and the fastener to pass through.

[0066] Alternatively, in other embodiments, the material density of the nosepiece 121 and / or the nosepiece cover plate 122 is less than 7.5 g / cm 3 , preferably, the material density of the nosepiece 121 and / or the nosepiece cover plate 122 is less than 7.3 g / cm 3 Due to the unevenness of the material, the density herein refers to the average density of the entire part.

[0067] Some embodiments of the present application provide a fastener driving device 100, in particular, a nail gun 100, which will be described with reference to Figure 7 and Figure 8The nosepiece assembly 12 further comprises a fixing base 127 fixedly connected with the muzzle 125, and the muzzle cover plate 126 is pivotally connected with the fixing base 127.

[0068] In some embodiments, the fixing base 127 is made by a powder metallurgy process.

[0069] Some embodiments of the present application provide a fastener driving device 100, in particular, a nail gun 100, with reference to Figure 9 and Figure 10 The nail gun 100 comprises a body 110, a magazine 130, a striker 140, and a nosepiece assembly 120. The magazine 130 is used to store fasteners, the striker 140 can drive the fasteners to move, the body 110 comprises a head housing 112, and the nosepiece assembly 120 is used to receive the driven fasteners, and is positioned on the head housing 112 by a pin 1216 and fixed on the head housing 112 by bolts 1215, where the pin 1216 is one, and the bolts 1215 are two. The nosepiece assembly 120 comprises oppositely arranged a muzzle 128 and a muzzle cover plate 129, and a channel is formed between the muzzle 128 and the muzzle cover plate 129, and the channel is used to receive fasteners from the magazine 130 and drive the fasteners in the channel by the striker 140.

[0070] The muzzle cover plate 129 is pivotally provided with a latch assembly 12, and the muzzle 128 is provided with a hook portion 1211, and the latch assembly 12 is operably locked or unlocked with the hook portion 1211. When the latch assembly 12 is locked with the hook portion 1211, the muzzle cover plate 129 is fastened with the muzzle 128, and when the latch assembly 12 is unlocked with the hook portion 1211, the muzzle cover plate 129 can be opened from the muzzle 128.

[0071] The muzzle 128 is made by a powder metallurgy process, and the hook portion 1211 is arranged on the first side of the muzzle 128 facing the muzzle cover plate 129, and the second side of the muzzle 128 away from the muzzle cover plate 129 is formed with a stepped surface by machining or an uneven surface with concave and convex by machining, that is, the second side of the muzzle 128 has a flat surface and a sunken portion 1281, the flat surface is a first surface 1282, and the lower surface of the sunken portion 1281 is a second surface 1283, the first surface 1282 is matched with the magazine 130, and the sunken portion 1281 of the muzzle 128 is fixed with the head housing 112 by bolts, that is, the second surface 1283 is matched with the head housing 112. The muzzle 128 is made by a powder metallurgy process, and then part of the flat surface is formed by machining. Specifically, the second side of the muzzle 128 is in contact with the upper flat surface of the magazine 130, at this time, the muzzle 128 has a fitting surface in contact with the magazine 130, and the flat surface defined herein is that the distance between the second side of the muzzle 121 and the fitting surface is within 1.5 mm.

[0072] It is noted that in some embodiments, referring to Figure 5 When the latch assembly 12 is disengaged from the catch portion 1211, the muzzle cover plate 122 can be opened from the muzzle 121, the muzzle cover plate 122 has a limiting portion 1220, when the muzzle cover plate 122 is completely opened from the muzzle 121, the limiting portion 1220 interferes with the protruding portion 1212, limiting the angle of the muzzle cover plate 122 opening relative to the muzzle 121 to less than 80 degrees. Preferably, the angle is between 40 degrees and 80 degrees, such as 45 degrees, 47 degrees, 52 degrees, 71 degrees, 79 degrees, etc. Specifically, the muzzle cover plate 122 is pivoted open relative to the muzzle 121, rotating open around the pivot axis by an angle less than 80 degrees with the muzzle 121. Since the fasteners in the magazine 130 are always under the feeding force of the channel into the nosepiece assembly 120, when the muzzle cover plate 122 is opened, the fasteners are prone to fly out towards the muzzle, causing accidental injury to personnel, so the muzzle cover plate 122 is set to open at an angle less than 80 degrees with the muzzle 121, resisting the fasteners moving towards the muzzle, which can prevent the fasteners from suddenly flying out.

[0073] In some embodiments, referring to Figure 10 The muzzle cover plate 129 has a limiting portion 1290, when the muzzle cover plate 129 is completely opened from the muzzle 128, the limiting portion 1290 interferes with the muzzle 128, limiting the angle of the muzzle cover plate 129 opening relative to the muzzle 128 to less than 80 degrees.

[0074] In some embodiments, referring to Figure 11 The second side 1218 of the muzzle (121, 125, 128) has protrusions 1219 for positioning the magazine 130, the protrusions 1219 are directly formed on the muzzle (121, 125, 128) by powder metallurgy process, the height of the protrusions 1219 is not more than 2mm, in order to facilitate powder metallurgy forming, the protrusions 1219 are at least two, in this embodiment, the protrusions 1219 are three, two of which are located on both sides of the magazine 130, and one is located on the side of the magazine 130 close to the direction of driving nails, for positioning the magazine 130, preventing the magazine 130 from jumping left and right forward, the protrusions 1219 are integrally formed with the muzzle by powder metallurgy process, the process is simple, facilitating manufacturing and achieving the purpose of positioning the magazine, while reducing manufacturing costs and effectively positioning the nail magazine.

[0075] Alternatively, the limiting portion can also be provided on the muzzle 128 or the body 110, as long as it can interfere with the muzzle cover plate when the muzzle cover plate is opened, limiting the angle of the muzzle cover plate opening relative to the muzzle to less than 80 degrees.

[0076] The gun nozzle and the cover plate of the application can meet the requirements of powder metallurgy process, are convenient to disassemble and assemble, meet the requirements of short cycle, low cost and high precision, are not easy to jam, and are convenient to clean.

[0077] The technical features of the above-described embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not contradict each other, they should be considered as falling within the scope of the present disclosure.

[0078] The above-described embodiments only express several implementation manners of the application, and the description is relatively specific and detailed, but should not be understood as limiting the scope of the patent of the application. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the application, and these all fall within the protection scope of the application.

Claims

1. A fastener driving device, characterized in that, include: ontology; A hopper is used to store fasteners; A striking pin is used to drive the movement of the fastener; The nose assembly, connected to the body, includes a nozzle and a nozzle cover disposed opposite to each other, with a channel formed between the nozzle and the nozzle cover for receiving the firing pin for driving fasteners from the hopper; A latching assembly is pivotally provided on the nozzle cover plate, and a hook portion is provided on the nozzle. The latching assembly is operable to lock or disengage with the hook portion. When the latching assembly is locked with the hook portion, the nozzle cover plate is locked together with the nozzle. When the latching assembly is disengaged from the hook portion, the nozzle cover plate can be opened from the nozzle. The hook portion is provided on a first side of the nozzle facing the nozzle cover plate, and a second side of the nozzle away from the nozzle cover plate contacts the hopper. At least one of the nozzle and the nozzle cover is manufactured by powder metallurgy, and the channel is formed by powder metallurgy.

2. The fastener driving device according to claim 1, characterized in that, The first side is also provided with a protrusion, and the nozzle cover is pivotally connected to the protrusion. The height difference between the protrusion and the hook is no more than 2mm.

3. The fastener driving device according to claim 1, characterized in that, The distance between the first side and the second side is not less than 4 mm.

4. The fastener driving device according to claim 1, characterized in that, After machining, the distance between the second side and the mating surface is greater than 1.5mm. The second side has a first surface and a second surface. The first surface mates with the hopper, and the second surface mates with the body.

5. The fastener driving device according to claim 1, characterized in that, The nozzle cover has a third side opposite to the first side and a fourth side opposite to the third side. The fourth side is provided with a first boss. The latch assembly is pivotally connected to the first boss. The third side is provided as a flat surface or the flat surface is machined to form a non-flat surface.

6. The fastener driving device according to claim 1, characterized in that, The nozzle and / or the nozzle cover are made of a material with a density of less than 7.5 g / cm³. 3 .

7. The fastener driving device according to claim 1, characterized in that, The nose assembly also includes a fixing seat, which is fixedly connected to the nozzle, and the nozzle cover is pivotally connected to the fixing seat. The fixing seat is manufactured by powder metallurgy.

8. The fastener driving device according to claim 1, characterized in that, The nozzle cover has a limiting part. When the nozzle cover is fully opened from the nozzle, the limiting part can limit the opening angle of the nozzle cover relative to the nozzle to a range of less than 80 degrees.

9. The fastener driving device according to claim 1, characterized in that, The second side has a protrusion for positioning the hopper, which is directly formed on the nozzle by powder metallurgy.

10. A fastener driving device, characterized in that, include: ontology; A hopper is used to store fasteners; A striking pin is used to drive the movement of the fastener; The nose assembly, connected to the body, includes a nozzle and a nozzle cover disposed opposite to each other, with a channel formed between the nozzle and the nozzle cover for receiving the firing pin for driving fasteners from the hopper; A latching assembly is pivotally provided on the nozzle cover plate, and a hook portion is provided on the nozzle. The latching assembly is operable to lock or disengage with the hook portion. When the latching assembly is locked with the hook portion, the nozzle cover plate is locked together with the nozzle. When the latching assembly is disengaged from the hook portion, the nozzle cover plate can be opened from the nozzle. The hook portion is provided on a first side of the nozzle facing the nozzle cover plate, and a second side of the nozzle away from the nozzle cover plate contacts the hopper. At least one of the nozzle and the nozzle cover is manufactured by powder metallurgy, the nozzle has a contact surface that contacts the hopper, and the distance between the second side of the nozzle away from the nozzle cover and the contact surface is less than 1.5 mm.

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