Patent Application
20090188963
1. Field of Invention
The present invention relates to a nail gun, and more particularly to an adjusting device for a nail gun.
2. Description of the Related Art
A conventional nail gun has a magazine having a shaft arid a disc feeder. The disc feeder is mounted on the shaft with a positioning protrusion and a positioning groove. The disc feeder can move between two stages to allow the magazine to be loaded with different lengths of nails.
However, when adjusting between the stages of the disc feeder, the disc feeder must be rotated, adjusted, then rotated again. Accordingly, adjusting the nail gun disc is laborious and time-consuming.
To overcome the shortcomings, the present invention provides an adjusting device for a nail gun to mitigate or obviate the aforementioned problems.
The primary objective of the present invention is to provide an adjusting device for a nail gun that allows easy adjustment of the disc feeder.
An adjusting device for a nail gun includes a magazine, a shaft, a disc feeder and a positioning assembly. The shaft is mounted in the magazine and has two sliding grooves longitudinally formed respectively in the shaft and multiple wedge shaped positioning recesses formed on the sliding grooves. The disc feeder includes a rotating disc and a sleeve mounted around the shaft and has two mounting holes each corresponding to a positioning recess. The positioning assembly includes a clamp and an E-clip holding two stops. The clamp is mounted in the sleeve and has two clamping aims. The slops are mounted respectively in the mounting holes respectively abutting the clamping arms. Therefore the magazine can be adjusted in one direction at multiple stages by pulling up thereby allowing the stops to slide rip the wedge shaped positioning recess and over an apex of the wedge shaped positioning recess. To push in the other direction the clamp is pressed to release the stops from the positioning recesses and allowing the sleeve to move past a base of the wedge shaped positioning recesses.
Other objectives, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
With reference to
The magazine (10) is cylindrical and hollow and has a hinged outer wall, a receiving chamber (11) and a base disc (12). The base disc (12) has an inner surface, an outer surface and an annular recess (122). The annular recess (122) is defined in the inner surface of the base disc (12).
With further reference to
The positioning slots (25) are respectively defined longitudinally in the shaft (20) diametrically and parallelly to each other. The sliding grooves (27) are respectively defined longitudinally in the shaft (20) diametrically and parallelly to each other and each sliding groove (27) has a distal opening (271). Each pair of positioning recesses (26) are defined diametrically in the shaft (20) respectively along a corresponding sliding groove (27). Preferably, four pairs of positioning recesses (26) are implemented. Each positioning recess (26) is an inverted wedge having a base (261), an apex (262) and a depth. The base (261) of each wedge is disposed toward the disc base (12). The apex (262) of each wedge is aligned centrally on the corresponding sliding groove (27) and has a guide incline. The depth of the positioning recess (26) is greater at the base (261) than the apex (262).
The disc feeder (30) is mounted around the shaft (20) and comprises a sleeve (31) and a rotating disc (32). The sleeve (31) is mounted around the shaft (20) and has a distal end, a proximal end, an inner surface, two mounting holes (33), a mounting groove (34), a mounting shoulder (36), two guiding grooves (37) and two wedging holes (38). The mounting holes (33) are respectively defined diametrically through the sleeve (31) near the proximal end of the sleeve (31) and each selectively corresponds to a positioning recess (26). The mounting groove (34) is defined around the proximal end of the sleeve (31) and through the mounting holes (33).
The mounting shoulder (36) is defined in the inner surface of the sleeve (31) at the distal end of the sleeve (31). The guiding grooves (37) are respectively, longitudinally defined diametrically in the inner surface of the sleeve (31) and correspond respectively to the sliding grooves (27) in the shaft (20) and may be formed through the mounting shoulder (36). The wedging holes (38) are respectively defined through the sleeve (31) and communicate respectively with the guiding grooves (37). The rotating disc (32) is formed on and protrudes radially from the proximal end of the sleeve (31).
The positioning assembly (40) is mounted between the shaft (20) and the sleeve (31) and comprises a clamp (41), an E-clip (43) and a positioning rod (44). The clamp (41) has a button (411) and two clamping arms (412). The button (411) may be circular, is mounted in the distal end of the sleeve (31), may be above the mounting shoulder (36), and has an outer surface and an inner surface. The outer surface of the button (41) protrudes out of the distal end of the sleeve (31). The clamping arms (412) are formed on and protrude from the inner surface of the button (411), are respectively mounted slidably in the guiding grooves (37) in the sleeve (31) and in the sliding grooves (27) in the shaft (20) and each clamping arm (412) has a distal end, an outer surface, a sliding incline (413) and a boss (414). The sliding incline (413) is defined at the distal end of the clamping arm (41) and is selectively disposed adjacent to a corresponding mounting hole (33) in the sleeve (31). The boss (414) is formed on the outer surface of the clamping arm (412) and is mounted in a corresponding wedging hole (38) in the sleeve (31).
The positioning rod (44) is mounted through the sleeve (31) and through the positioning slots (25) in the shaft (20) to prevent rotation of the sleeve (31) relative to the shaft (20). The E-clip (43) is mounted in the mounting groove (34) in the sleeve (31) and has a central segment, an inner protrusion (431) and two stops (42). The inner protrusion (431) is formed on the central segment and is mounted in the positioning rod (44). The stops (42) are mounted respectively in the mounting holes (33) in the sleeve (31), arc disposed adjacent to the E-clip (43) and may be blocks or protrusions formed on the E-clip (43) and each stop (42) has an inner end having a push incline (412) formed thereon and abutting the sliding incline (413) of a corresponding clamping arm (412).
When the adjusting device is in use, the magazine (10) is mounted on a nail gun. A clip of nails is loaded into the receiving chamber (11) of the magazine (10) around the sleeve (31) and abuts the rotating disc (32). Therefore, the nails can be transferred continuously to the nail gun by rotation of die disc feeder (30).
When the clip of nails is loaded in the magazine (10), the disc feeder (30) can be slid up and down to selectively fit different length of nails. With further reference to
When the sleeve (31) is pulled up, the stops (42) are moved toward the apexes (262) of the pair of positioning recesses (26) before being forced into another pair of positioning recesses (26) by the E-clip (43). Engagement between the bases (261) of the positioning recesses (26) and the stops (42) means the stops (42) arc held securely by the positioning recesses (26) even when the sleeve (31) is pulled down. Additionally, because multiple pairs of positioning recesses (26) are defined in the shaft (31), the disc feeder (30) can be adjusted at multiple stages to correspond to different lengths of nails.
With further reference to
Even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and features of the invention, the disclosure is illustrative only. Changes may be made in the details, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
