Fastener driving apparatus

Abstract

This application provides a fastener driving device, specifically relating to a nail gun, including: a cartridge, a firing pin, and a nose assembly. The nose assembly includes a nozzle and a nozzle cover plate. The nozzle cover plate is connected to the nozzle and can rotate between a closed position and an open position. A latching assembly is pivotally provided on the nozzle cover plate. The nozzle has a contact surface that contacts the cartridge. The nozzle is manufactured using powder metallurgy. A hook portion is provided on a first side of the nozzle facing the nozzle cover plate. At least one of the nozzle and the nozzle cover plate is manufactured using powder metallurgy, and a channel is formed using powder metallurgy. The fastener driving device provided by this application uses powder metallurgy for its nozzle, resulting in low cost and short cycle time. It also makes the fastener driving device less prone to nail jamming, and when jamming occurs, nail removal is convenient.

Description

Technical Field

[0001] This utility model relates to a fastener driving device, and more particularly to a nail gun for impact fasteners. Background Technology

[0002] Because the nails used in nail guns on the market are manufactured by different brands, there are deviations between nails from different brands. Furthermore, there are errors in the manufacturing and assembly of the nail gun parts themselves, which inevitably leads to nail jamming during use. Therefore, a quick-release structure for simple and convenient nail removal is the mainstream trend for nail guns.

[0003] Existing nail guns with quick-clearing nozzles and covers come in two types: one is a one-piece cast steel nozzle, which allows for quick nail clearance by opening the nozzle cover when a nail gets stuck, but cast steel nozzles have a long manufacturing cycle and high cost; the other is a split nozzle, where one part is fixedly connected to the nail magazine, and the other part is connected to another movable nail magazine. When a nail gets stuck, the movable nail magazine is opened, and the nozzle separates into two parts for nail clearance. However, nail clearance is less visible, the space is narrow, and operation is inconvenient, and split nozzles are more prone to nail jamming.

[0004] For one-piece cast steel nozzles, the casting process for the blanks is complex, taking approximately 1.5 to 2 months or more from mold making to finished product processing. Furthermore, each subsequent sample manufacturing cycle after mold opening requires more than one month, resulting in an exceptionally long production cycle. Moreover, the yield rate of the blanks is affected by environmental factors, materials, and wax molds. The blank-making process is complex, and the precision of the cast steel blanks is very low. Many areas, such as nail grooves, firing pin grooves, and mating surfaces, require numerous machining processes, making the cost extremely high.

[0005] For split-type nozzles, the nozzle is separate, and after a nail jams, the nail needs to be cleaned from below the nozzle, which is inconvenient due to the narrow space, visibility, and operation. Furthermore, it not only requires high precision in the manufacturing of the components but also necessitates high assembly precision, increasing costs. Because the two separate parts use different processes and assembly fixtures, cumulative manufacturing and assembly deviations are inevitable, resulting in low overall precision of the nozzle and nail magazine, making them prone to jamming. Utility Model Content

[0006] In view of this, this application provides a fastener driving device to solve the problems of high cost, long manufacturing cycle and inconvenient removal of stuck nails in traditional nail guns.

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

[0008] ontology;

[0009] A hopper is used to store fasteners;

[0010] A striking pin is used to drive the movement of the fastener;

[0011] The nose assembly, connected to the body, includes a nozzle and a nozzle cover disposed opposite each other, with a channel formed between the nozzle and the nozzle cover for receiving fasteners driven by the firing pin from the hopper;

[0012] 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 fastened to 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.

[0013] At least one of the nozzle and the nozzle cover is manufactured by powder metallurgy, and the channel is formed by powder metallurgy.

[0014] In one possible implementation, the first side is further provided with a protrusion, and the nozzle cover is pivotally connected to the protrusion.

[0015] In one possible implementation, the height difference between the protrusion and the hook portion is no greater than 2mm.

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

[0017] In one possible implementation, the distance between the second side and the mating surface after machining is greater than 1.5 mm. 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.

[0018] In one possible implementation, the nozzle is a one-piece structure or is composed of multiple pieces joined together.

[0019] In one possible implementation, the nozzle is detachably connected to the body, the nozzle is provided with a positioning hole, and the body is provided with a positioning pin that matches the positioning hole.

[0020] In one possible implementation, the nozzle cover has a third side opposite to the first side and a fourth side opposite to the third side, the fourth side having a first boss, the latch assembly being pivotally connected to the first boss, and the third side being configured as a flat surface or having the flat surface machined into a non-flat surface.

[0021] In one possible implementation, the nozzle and / or the nozzle cover are made of a material with a density of less than 7.5 g / cm³. 3 .

[0022] In one possible implementation, the nose assembly further includes a mounting base fixedly connected to the nozzle, and the nozzle cover plate pivotally connected to the mounting base.

[0023] In one possible implementation, the mounting base is manufactured using a powder metallurgy process.

[0024] In one possible implementation, the nozzle cover has a limiting portion that, when the nozzle cover is fully opened from the nozzle, limits the angle at which the nozzle cover is opened relative to the nozzle to less than 80 degrees.

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

[0026] This application also provides a fastener driving device, including:

[0027] ontology;

[0028] A hopper is used to store fasteners;

[0029] A striking pin is used to drive the movement of the fastener;

[0030] The nose assembly, connected to the body, includes a nozzle and a nozzle cover disposed opposite each other, with a channel formed between the nozzle and the nozzle cover for receiving fasteners driven by the firing pin from the hopper;

[0031] 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 fastened to 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.

[0032] 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.

[0033] The fastener driving device provided in this application features a quick-release mechanism for the clips, and the nozzle is manufactured using powder metallurgy, resulting in a short manufacturing cycle and low cost. Due to the simplicity of the powder metallurgy forming process, the cycle time is reduced by at least half compared to cast steel. Generally, powder metallurgy takes only 0.5 to 1 month from mold to finished product, and the manufacturing cycle for each sample after mold opening is only 5 to 10 days, significantly shortening the cycle. Furthermore, powder metallurgy forming offers high precision; most features can be achieved with the precision of the mold forming process, eliminating the need for excessive machining and greatly reducing costs. In addition, it also facilitates easy and convenient clip removal, achieving higher precision and reducing the likelihood of clipping. The powder metallurgy nozzle of this application is integrally formed using powder metallurgy, completing multiple manufacturing processes within a single tooling / fixture. This eliminates manufacturing errors associated with different tooling / fixtures for separate parts and eliminates the need for separate assembly, thus eliminating assembly errors. While meeting the requirements of powder metallurgy, it offers quick and convenient release, a short cycle time, low cost, high precision, and is less prone to clipping.

[0034] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0035] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0036] Figure 1 This is a schematic diagram of a nail gun structure according to one embodiment of this application;

[0037] Figure 2 This is a schematic diagram of a nail gun partial explosion structure according to one embodiment of this application;

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

[0039] Figure 4 This is a diagram showing the nozzle cover in two states: closed and open.

[0040] Figure 5 Side view of the nozzle cover in both closed and open states;

[0041] Figure 6 This is a front view of the nozzle structure;

[0042] Figure 7 This is a partial structural diagram of a nail gun according to another embodiment of this application;

[0043] Figure 8 for Figure 7 Schematic diagram of a partial explosion of a nail gun;

[0044] Figure 9This is a partial structural diagram of a nail gun according to another embodiment of this application;

[0045] Figure 10 This is a schematic diagram of a partial explosion of a nail gun.

[0046] Figure 11 This is a partial structural diagram of a nail gun according to another embodiment of this application;

[0047] Explanation of reference numerals in the attached figures:

[0048] 100-Fastener drive device; 110-Body; 111, 112-Head shell; 120-Nose assembly; 121, 125, 128-Nose; 1211-Hook; 1212-Protrusion; 1213-Connecting hole; 1214-Positioning hole; 1215-Bolt; 1216-Positioning pin; 1217-First side; 1218-Second side; 1219-Protrusion; 1210-Channel; 122, 1 26, 129 - Nozzle cover; 1221 - First boss; 1222 - Second boss; 1223 - Third side; 1224 - Fourth side; 12 - Latch assembly; 123 - Pressure handle; 124 - Pivot; 127 - Fixing base; 1281 - Recessed part; 1282 - First surface; 1283 - Second surface; 130 - Feed hopper; 131 - Snap-fit ​​part; 140 - Firing pin; 1220, 1290 - Limiting part. Detailed Implementation

[0049] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the implementation methods and features in the implementation methods of this application can be combined with each other.

[0050] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this application and 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, and therefore should not be construed as a limitation on this application. Furthermore, "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0052] Some embodiments of this application provide a fastener driving device 100, specifically, a nail gun 100, see reference. Figures 1-6 The nail gun 100 includes a body 110, a cartridge 130, a firing pin 140, and a nose assembly 120. The cartridge 130 stores fasteners and continuously supplies them to the nose assembly 120. The firing pin 140 is partially disposed within the body 110 and can reciprocate between a top position and a striking position. When the firing pin 140 is in the striking position, it can drive the fastener in the nose assembly 120 to move, thereby driving the fastener into the workpiece to achieve fastening. The body 110 includes a head shell 111, and the nose assembly 120 is connected to the head shell 111 for receiving the driven fastener. The nose assembly 120 includes a nozzle 121 and a nozzle cover 122 disposed opposite to each other. A channel 1210 is formed between the nozzle 121 and the nozzle cover 122. The channel 1210 is used to receive the movement of the firing pin 140. When the firing pin 140 moves into the channel 1210, it drives the fastener from the cartridge 130. In some embodiments, the firing pin channel 1210 is formed on the nozzle 121. Optionally, the firing pin channel 1210 may also be formed on the nozzle cover 122. Alternatively, the firing pin channel 1210 may be partially formed on the nozzle 121 and partially formed on the nozzle cover 122.

[0053] like Figure 2 and Figure 3 As shown, a latching assembly 12 is pivotally mounted on the nozzle cover 122. The latching assembly 12 includes a pressure handle 123 and a pivot member 124. The pressure handle 123 is pivotally connected to the nozzle cover 122. The pivot member 124 is an elastic element, such as a steel wire, and is pivotally connected to the pressure handle 123. A hook portion 1211 is provided on the nozzle 121. The pivot member 124 is operably locked or disengaged from the hook portion 1211. When the pivot member 124 is locked with the hook portion 1211, the nozzle cover 122 is fastened to the nozzle 121. When the pivot member 124 is disengaged from the hook portion 1211, the nozzle cover 122 can be opened from the nozzle 121. See also 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 also provided with a protrusion 1212, and the nozzle cover 122 is pivotally connected to the protrusion 1212. This design makes it easy to open the nozzle cover when a jam occurs.

[0058] In some implementations, see Figure 6 The height difference between the protrusion 1212 and the hook 1211 is no greater than 2mm. Preferably, the height difference between the protrusion 1212 and the hook 1211 is no greater than 1.5mm. The distance between the hook 1211 and the contact surface is defined as H1, and the distance between the protrusion 1212 and the contact surface is defined as H2. That is, the difference between H1 and H2 is no greater than 2mm, preferably no greater than 1.5mm. This facilitates the direct forming of the nozzle by powder metallurgy.

[0059] In some embodiments, see 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 4mm. This can effectively ensure the strength of the nozzle and prevent it from breaking due to insufficient strength when dropped.

[0060] In some embodiments, the nozzle 121 is a one-piece structure or composed of multiple pieces. The nozzle 121 is provided with a connecting hole 1213 and a positioning hole 1214, located near the head shell 111. Due to tolerances in bolt connections, a positioning pin is added to first position the nozzle 121. Specifically, the head shell 111 is provided with a positioning pin 1216 that matches the positioning hole 1214. The positioning pin 1216 passes through the positioning hole 1214 to position the nozzle 121 on the head shell 111. A bolt 1215 passes through the connecting hole 1213 to connect the nozzle 121 to the head shell 111. In this embodiment, two connecting holes 1213 and two positioning holes 1214 are provided, symmetrically arranged on the nozzle along the firing pin drive axis, which improves the connection accuracy between the nozzle 121 and the head shell 111 and ensures a reliable connection. In other embodiments, two connecting holes 1213 and one positioning hole 1214 are provided, and the number of connecting holes 1213 and positioning holes 1214 can be adjusted according to installation requirements. Optionally, when bolt connection can meet the accuracy requirements, positioning pins may not be provided.

[0061] In some embodiments, the nozzle cover 122 is manufactured using a powder metallurgy process.

[0062] In some embodiments, the nozzle cover 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 a first boss 1221, and the latch assembly 12 is pivotally connected to the first boss 1221. The third side 1223 is provided with a flat surface. The nozzle cover 122 has a nozzle cover mating surface that contacts the nozzle 121. Here, a flat surface is defined as the distance between the third side 1223 of the nozzle cover 122 and the nozzle cover mating surface being within 1.5 mm.

[0063] In some embodiments, the nozzle cover 122 further includes a second boss 1222, which is disposed inside the protrusion 1212. The nozzle cover 122 is pivotally connected to the protrusion 1212 of the nozzle 121 through the second boss 1222, thereby realizing the pivotal connection between the nozzle cover 122 and the nozzle 121.

[0064] In some embodiments, the height difference between the first boss 1221 and the second boss 1222 is no greater than 1.5mm, that is, the difference between the distance of the first boss 1221 from the mating surface of the nozzle cover 122 and the distance of the second boss 1222 from the mating surface of the nozzle cover 122 is no greater than 1.5mm.

[0065] In some embodiments, the third side 1223 of the nozzle cover 122 is formed with a groove through powder metallurgy or subsequent machining, resulting in an uneven surface with irregularities. The groove matches the shape of the firing pin, thereby forming a channel 1210 between the nozzle cover 122 and the nozzle 121 to accommodate the driven fastener, allowing the firing pin 140 to reciprocate within the channel 1210. In other embodiments, the channel 1210 may also be formed on the first side 1217 of the nozzle 121 through powder metallurgy or subsequent machining. Optionally, the channel 1210 may also be formed on both the third side 1223 of the nozzle cover 122 and the first side 1217 of the nozzle 121 through powder metallurgy or subsequent machining, as long as the accuracy and strength requirements are met, allowing the firing pin and fastener to pass through.

[0066] Optionally, in other embodiments, the nozzle 121 and / or nozzle cover 122 are made of a material with a density of less than 7.5 g / cm³. 3 Preferably, the material used for the nozzle 121 and / or nozzle cover 122 has a density of less than 7.3 g / cm³. 3 Due to the non-uniformity of the material, the density here refers to the average density of the entire part.

[0067] Some embodiments of this application provide a fastener driving device 100, specifically, a nail gun 100, see reference. Figure 7 and Figure 8The nose component assembly 12 also includes a fixing seat 127, which is fixedly connected to the nozzle 125, and the nozzle cover plate 126 is pivotally connected to the fixing seat 127.

[0068] In some embodiments, the mounting base 127 is manufactured using a powder metallurgy process.

[0069] Some embodiments of this application provide a fastener driving device 100, specifically, a nail gun 100, see reference. Figure 9 and Figure 10 The nail gun 100 includes a body 110, a cartridge 130, a firing pin 140, and a nose assembly 120. The cartridge 130 is used to store fasteners, and the firing pin 140 can drive the fasteners to move. The body 110 includes a head shell 112. The nose assembly 120 is used to receive the driven fasteners and is positioned on the head shell 112 by a pin 1216 and fixed on the head shell 112 by bolts 1215. Here, there is one pin 1216 and two bolts 1215. The nose assembly 120 includes a nozzle 128 and a nozzle cover plate 129 disposed opposite to each other. A channel is formed between the nozzle 128 and the nozzle cover plate 129. The channel is used to receive fasteners from the cartridge 130, and the firing pin 140 drives the fasteners in the channel.

[0070] A latching assembly 12 is pivotally mounted on the nozzle cover 129, and a hook portion 1211 is provided on the nozzle 128. The latching assembly 12 is operable to lock or disengage from the hook portion 1211. When the latching assembly 12 is locked with the hook portion 1211, the nozzle cover 129 is fastened to the nozzle 128. When the latching assembly 12 is disengaged from the hook portion 1211, the nozzle cover 129 can be opened from the nozzle 128.

[0071] The nozzle 128 is manufactured using powder metallurgy. A hook portion 1211 is provided on the first side of the nozzle 128 facing the nozzle cover plate 129. The second side of the nozzle 128 away from the nozzle cover plate 129 is formed by machining to form a stepped surface or an uneven surface with concave and convex features. That is, the second side of the nozzle 128 has a flat surface and a recessed portion 1281. The flat surface is the first surface 1282, and the lower surface of the recessed portion 1281 is the second surface 1283. The first surface 1282 is engaged with the hopper 130. The recessed portion 1281 of the nozzle 128 is fixed to the head shell 112 by bolts, that is, the second surface 1283 is engaged with the head shell 112. The nozzle 128 is made by powder metallurgy and then machined to form a partially flat surface. Specifically, the second side of the nozzle 128 contacts the upper surface of the hopper 130. At this time, the nozzle 128 has a contact surface that contacts the hopper 130. Here, the flat surface is defined as the distance between the second side of the nozzle 121 and the contact surface being within 1.5 mm.

[0072] It should be noted that in some other implementations, see [link to relevant documentation]. Figure 5 When the latch assembly 12 disengages from the hook portion 1211, the nozzle cover 122 can be opened from the nozzle 121. The nozzle cover 122 has a limiting portion 1220. When the nozzle cover 122 is fully opened from the nozzle 121, the limiting portion 1220 interferes with the protrusion 1212, limiting the opening angle of the nozzle cover 122 relative to the nozzle 121 to a range of 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 nozzle cover 122 pivots open relative to the nozzle 121, opening at an angle less than 80 degrees with respect to the nozzle 121 around the pivot axis. Since the fasteners in the hopper 130 are constantly subjected to the feeding force of the feed into the channel of the nose assembly 120, when the nozzle cover 122 is opened, the fasteners are prone to fly out towards the nozzle, causing accidental injury to personnel. Therefore, the nozzle cover 122 is set to open at an angle less than 80 degrees with the nozzle 121, abutting against the fasteners moving towards the nozzle, which can prevent the fasteners from suddenly flying out.

[0073] In some embodiments, see Figure 10 The nozzle cover 129 has a limiting part 1290. When the nozzle cover 129 is fully opened from the nozzle 128, the limiting part 1290 interferes with the nozzle 128, limiting the opening angle of the nozzle cover 129 relative to the nozzle 128 to a range of less than 80 degrees.

[0074] In some embodiments, see Figure 11 The second side 1218 of the nozzle (121, 125, 128) has a protrusion 1219 for positioning the hopper 130. The protrusion 1219 is directly formed on the nozzle (121, 125, 128) by powder metallurgy. The height of the protrusion 1219 is no more than 2mm to facilitate powder metallurgy forming. There are at least two protrusions 1219. In this embodiment, there are three protrusions 1219. Two are located on both sides of the hopper 130, and one is located on the side of the hopper 130 closer to the nailing direction. It is used to position the hopper 130 and prevent the hopper 130 from moving in the left, right and forward directions. The protrusion 1219 is integrally formed with the nozzle by powder metallurgy. The process is simple, easy to manufacture and form, and achieves the purpose of positioning the hopper. It effectively positions the nail box while reducing manufacturing costs.

[0075] Optionally, the limiting part can also be set on the nozzle 128 or the body 110, as long as it can interfere with the nozzle cover when it is opened, and the angle between the nozzle cover and the opening of the nozzle is limited to less than 80 degrees.

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

[0077] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this 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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