KR100291865B1 - Cartridge type screwdriver - Google Patents

Abstract

The driver 10 for a plurality of bits uses a break loading magazine 20 to store a plurality of bits. The magazine 20 is enclosed inside the hollow handle 13 of the driver and is pulled out along the axis of the driver when the end-cap of the handle 12 is pulled out. A number of bits are stored in magazine 20 and are located along the circumference of the magazine tube that reciprocates with respect to the driver. When the magazine 20 is completely pulled out, the bit is easily seen and can be removed from the clip 24 or placed in the clip 24 by simply applying a radial force.

Description

Tool of type with multiple bits {CARTRIDGE TYPE SCREWDRIVER}

The use and presence of a plurality of tools for bits is already well known. In general, for a manual driver, several bits are stored in the driver's handle. To remove one bit, the user removes the end cap of the handle so that the bit can be exposed. One problem with this tool is that the user has difficulty determining the appropriate bit without first pulling out the bit. Thus, normally all bits are freed from the handle.

Various mechanisms have been devised to select individual bits. US Pat. No. 4,463,788 to Corona et al. Discloses a mechanism comprising a rotatable disc at the anterior end of a handle, in which case the slots within the handle are defined as a storage chamber, i. guides the bits to the chuck one at a time.

Graham's US Pat. No. 4,572,038 describes a mechanism in which bits are stored in a front magazine that rotates about its rear retractable drive shaft to engage individually with the bits stored in the magazine. It is.

Butler US Pat. No. 3,753,455 discloses a configuration in which bits are fed directly from the storage chamber to the chuck by their own weight.

The present invention relates to a plurality of bit tools, more particularly to a plurality of bit tools such as a screwdriver.

1A, 1B and 1C are side, front and back views respectively showing a driver according to an aspect of the present invention.

2A, 2B and 2C are side, front and back views, respectively, showing a first fixed shaft for use in the tool of FIG.

FIG. 2D is a cross-sectional view taken along line IID-IID in FIG. 2A;

3A and 3B are side and back views of the handle of the FIG. 1 tool together with the shaft of FIG.

4A and 4B are cross-sectional views of the caps along the IVA-IVA line of FIG. 1C and the IVB-IVB line of FIG. 1A, respectively.

Fig. 5a is a side view showing the bit magazine and the cylindrical shaft of the tool according to the invention.

FIG. 5B is taken along the line VB-VB in FIG. 5A; FIG.

5C is a cross sectional view along line VC-VC in FIG. 5A;

6A, 6B and 6C are side, front and back views, respectively, showing a retaining ring of the tool according to the invention.

FIG. 6D is a cross sectional view along line VID-VID in FIG. 6C;

7a and 7b show a side view, and an end of a handle bearing of a tool according to the invention;

8A is a cross-sectional view taken along the line VIIA-VIIA in FIG. 1A.

FIG. 8B is a sectional view taken along the line XXXB-XXXB of FIG. 8A; FIG.

9 is a schematic illustration showing a partial cross section of a driver according to the invention with the handle in an extended position;

According to the invention there is provided a chuck, a first stationary shaft extending from the chuck inside the handle and a first position substantially entirely located inside the handle, from the first position to a second position substantially outside the handle. A driver type tool is provided that consists of a second cylindrical shaft movable on the fixed shaft in the longitudinal direction of the tool.

Referring now to the drawings, the tool, advantageously the entire screwdriver, is shown at 10 in FIG. 1. The tool together with a first fixed shaft 11, an injection molded hollow handle 12 surrounding the circumference of one end of the first fixed shaft 11, and the hollow handle 12. An end cap 13 that forms an enclosure and is movable relative to the handle 12 as will be described later.

Referring now to FIG. 2A, the first stationary shaft 11 includes a flat portion 14 with which the injection molded handle 12 is in contact. The first stationary shaft 11 also includes a hexagonal opening or chuck 15 that can receive a bit of the tool. An opposite end of the first fixed shaft 11 opposite the chuck 15 has a reduced diameter portion 16, the opposite end having a plurality of circumferential teeth 17. It includes.

The bit storage magazine, shown in its entirety by reference numeral 20 (see FIG. 5C), has a second hollow cylindrical shaft 21 having a plurality of fins projecting outwards along the circumference of the cylindrical shaft 21. And each pair of pins receives and maintains a tool bit having a circumference of a size that can be fitted to the chuck 15. The second cylindrical shaft 21 comprises a structure having a narrow internal diameter or collar 22 and a concave bevel 23 at the opposite end. The inner diameter portion 22 is slightly larger than the outer diameter of the first fixed shaft 11 so that the second cylindrical shaft 21 can reciprocate along the first fixed shaft 11.

The first and second flanges 27, 28 preferably project from the cylindrical shaft 21 on both sides of the pin 24. The flanges 27, 28 are located apart from each other by a distance slightly longer than the length of the longest tool bit stored between the pins 24 and in the excessively longitudinal direction of the tool bits stored in the magazine 20. It serves to prevent displacement. More specifically, the first flange 27 has a tool bit retained between the pins 24 when the magazine 20 is in the pulled out position (as discussed below) so that the inside of the handle 12 slides. Prevent falling. The second flange 28 prevents the tool bit held between the pins 24 from slipping towards the end cap 13.

The retaining ring, shown generally at 30 in FIG. 6, includes an opening 32 for receiving the end 17 and the teeth 17 of the first fixed shaft 11, and the second cylindrical shaft 21. A number of arms 35 that are inserted in to generate friction and that are temporarily locked to the inclined portion 23 of the second cylindrical shaft 21 when the flexible arm extends beyond the inclined portion 23. Has a shape of a cylinder 31 with a clip 33 of a circular spring type.

The end cap 13 (of FIG. 4) comprises an opening 40, which receives the bevel end of the second cylindrical shaft 21 in a press fit manner. can do. The end cap 13 securely couples between the end cap 13 and the handle 12 and has a tapered sleeve 41 that can be inserted into the handle 12 to provide radial support to the opening of the handle. Also includes. The taper of the sleeve 41 facilitates the introduction of the end cap 13 into the handle 12 and also facilitates alignment between the end cap and the handle.

The handle 12 also includes a bearing cap 50 at the front end. This bearing cap 50 rotates relative to the handle 12 on the handle 12.

In order to attach the bit storage magazine 20 (see FIG. 5), the second cylindrical shaft 21 is fitted to the outside of the first fixed shaft 11, and the magazine 20 is attached to the first shaft 11. By sliding along the circumference it is fully inserted into the hollow handle 12. In the position where the magazine 20 is thus fully inserted into the handle 12, it is accessible to the end portion of the first fixed shaft 11 through the end of the second cylindrical shaft 21. The retaining ring 30 enters into the second cylindrical shaft 21 such that the opening 32 of the retaining ring 30 slides over the end of the first fixed shaft until it is secured in place by the action of the teeth 17. Is inserted. The magazine 20 is then withdrawn from the hollow handle 12, while the retaining ring 30 remains attached to the first fixed shaft 11, while the spring clip 33 is removed as described above. 2 Generate frictional force against the inside of the cylindrical shaft. The end of the second cylindrical shaft 21 is then inserted into the opening 40 of the end cap 13 and joined in place chemically or otherwise. Thus, a pocket is formed between the inclined portion 23 of the second cylindrical shaft and the end cap 13 which receives the enlarged portion of the spring clip 33 in the locked position.

work

In operation, the magazine 20 is withdrawn from the interior of the hollow handle 12 by pulling the end cap 13. The second inner diameter or collar 22 of the front end and the spring clip 33 are guided by friction generated by pressing against the inner hollow diameter of the second cylindrical shaft 21, while the second The cylindrical shaft 21 moves along the first fixed shaft 11. When the end cap 13 is pulled away from the handle 12, the spring clip 33 is retracted from the pocket formed by the bevel end 23 of the second cylindrical shaft 21 and the second It should be noted that it is pressed against the hollow inner diameter of the cylindrical shaft 21. The magazine 20 is withdrawn until the narrow inner diameter 22 of the second cylindrical shaft 21 contacts the front end of the retaining ring 30.

In the retracted position, the pair of pins 24 and the tool bits (not shown) held by them are fully exposed to the user. The user rotates the magazine 20 to inspect the bits, and selects the desired bits to remove the bits fixed to the pins 24 by applying radially outward force. Thus, by applying a force radially inwardly, unnecessary bits can be located between the pair of pins 24 that are no longer used.

The magazine 20 is then inserted back into the hollow handle 12 by pressing the end cap 13. When the magazine 20 is in the handle 12, the spring clip 33 can move into a pocket formed between the inclined portion 23 of the second cylindrical shaft and the opening 40 of the end cap, and the end cap 13 ) Is maintained in its closed position. The spring clip 33 is enlarged in the pocket and locks the magazine 20 in the closed position.

According to another feature of the invention, the end cap 13 is rotatable about the handle 12 about the stationary shaft 11 when the magazine 20 is in its closed position. This mechanism allows the user to apply a driving or axial force with one hand and torque the tool with the other hand. To apply a force to the workpiece, the user places the palm of one hand against the end cap 13 and applies a force along the axis of the tool. Torque is applied by the user grasping the driver handle 12 and rotating the handle relative to the end cap 13. Alternatively, the bearing 50 can be held and the handle 12 rotated to rotate the tool and the bit relative to the bearing 50.

While specific embodiments of the invention have been described, many changes can be readily made by those skilled in the art to which the invention relates. Accordingly, the above embodiments are to be considered as illustrative of the invention and are not intended to limit the scope of the invention as defined in accordance with the appended claims.

Claims (8)

In a tool of the type having a chuck 15 and a plurality of bits having a first shaft 11 extending from the chuck in the handle 12, Movable longitudinally on the first shaft from a first position in which an entire second barrel shaft is substantially located within the handle to a second position in which the second cylindrical shaft is substantially outside of the handle The second cylindrical shaft (21); An end cap (13) mounted on the second cylindrical shaft and movable with the second cylindrical shaft, closing the end of the handle when the second cylindrical shaft is in the first position; The end cap (13) opening the end of the handle when the second cylindrical shaft is in the second position; And, A magazine 20 mounted on the second cylindrical shaft and movable with the second cylindrical shaft, the magazine 20 positioned within the handle when the second cylindrical shaft is in the first position and the second cylindrical shaft. Characterized in that the magazine is located outside of the handle when is in the second position. 2. The magazine (20) of claim 1, wherein the magazine (20) has a plurality of resilient bit holders (24), the bit holders mounted along the circumference of the second cylindrical shaft (21) and having a plurality of bits. A tool of the type having a plurality of bits, adapted to be mounted and removed. The tool of claim 1, wherein the end cap (13) is rotatable relative to the handle (12) when the end cap is in its closed position. 4. A tool according to claim 3, further comprising a bearing (50) rotatable relative to the handle (12) on the handle (12). The tool of claim 1, wherein the magazine (20) is rotatable about the handle (12). The first shaft (11) according to claim 1, wherein the end cap (13) is held in its closed position while the second cylindrical shaft is moved in the longitudinal direction with respect to the first shaft to generate friction. A tool with a plurality of bits, further comprising a device operated between the second cylindrical shaft (13). 7. The device according to claim 6, wherein the device for generating friction while holding the end cap (13) in its closed position during movement in the longitudinal direction is in contact with the inside of the second cylindrical shaft (21). An elastic clip 33 on said second cylindrical shaft and said end cap for receiving said elastic clip to hold said end cap in its closed position when said second cylindrical shaft is in said first position. A tool of type having a plurality of bits, comprising a pocket formed between. 2. The first and second flanges 27, 28 protruding outwardly on the second cylindrical shaft 21 to prevent longitudinal displacement of the tool bits held in the magazine 20. And a plurality of bits.