JPH0141568Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention forms a Phillips-head screwdriver at one end,
A shaft rod with a flathead screwdriver formed on the other end can be freely inserted into the insertion hole provided in the handle and fixed.In the screwdriver, the shaft rod inserted into the insertion hole is firmly fixed in the handle. It is related to the device.

Traditionally, screwdrivers with replaceable shafts have been commonly used, but in most cases, the means to securely attach the shaft to the handle is simply by inserting the shaft into a non-rotating collar. The insertion hole for the shaft rod must be drilled so that there is as little loosening as possible when inserting the shaft rod, which is inconvenient and requires a lot of work. There are some that are arranged diagonally and press the shaft rod with a leaf spring, but since the leaf spring is simply arranged diagonally, the elastic force is weak, and therefore,
It was not possible to effectively press and hold the shaft rod. Therefore, the present invention has been made with the aim of eliminating the deficiencies of the conventional shaft bar holder.

The present invention will be explained with reference to the embodiment shown in the drawings.
1 is a handle, 2 is a flat-head screwdriver formed on the upper end of the shaft rod 4, 3 is a Phillips-head screwdriver also formed on the lower end, 5 is a detent key protruding from the opposing outer peripheral surfaces in the middle, Reference numeral 6 is a metal collar that is firmly fitted into the opening of the insertion hole 7 of the shaft rod 4 provided in the handle 1, and a key groove 8 is provided in which the locking key 5 provided on the shaft rod 4 is fitted. There is. Reference numeral 9 denotes a groove provided in the outer longitudinal direction of the collar 6, and a locking step portion 10 is provided on the upper bottom surface of the groove. 11 is a leaf spring whose total length is 1/3 of the handle 1 in the extended state.
The upper half of the groove 9 is inserted into the groove 9, and the bent locking part 1 is provided at the upper end.
2 is locked to the locking step 10, the lower extension part is largely curved toward the center of the insertion hole 7 of the shaft rod 4, and the lower end 13 is pressed against the inner wall surface of the insertion hole 7. It was designed to do so.

Since the present invention is constructed as described above, the shaft rod 4
When inserted into the shaft rod insertion hole 7 of the handle 1 as shown in FIG. The shaft rod 4 is firmly fixed to the handle 1 by the action of the key 5 engaged in the groove 8. Therefore, the shaft rod 4 is not loose,
It looks like it's integrated with the handle, making the driver extremely easy to use. Furthermore, the screwdriver can be replaced very easily by pulling out the shaft 4 from the handle 1 against the elastic force of the leaf spring 11, and it can be easily removed without damaging the leaf spring.

Therefore, according to the present proposal, in order to attach and fix the shaft to the handle, the lower half is largely curved toward the center of the insertion hole of the shaft, and the lower end is pressed against the inner wall surface of the insertion hole. Because the leaf spring is held in place by the spring, the shaft is firmly held in the handle and does not accidentally fall off during use, but it also has the advantage of being extremely easy to replace. Its explosive power is not significantly reduced even by extreme use. In addition, when manufacturing the leaf spring, when attaching the collar to the handle, the bent locking part at the tip of the leaf spring can be locked into the locking stepped part in the groove and set, and the leaf spring can be installed as is. Workability is extremely good, and the leaf spring is relatively long, with a total length of 1/3 to half the length of the handle, so the spring action is smooth, allowing for easy insertion and removal, and the desired holding performance. is,
It can withstand repeated use without breaking and has a remarkable practical effect. Therefore, it is extremely effective as a shaft holding device for this type of driver.

[Brief explanation of the drawing]

The drawings show the main idea: Figure 1 is an overall front view showing a part of the handle in cross section, Figure 2 is a side view, and Figure 3 is an overall view of the shaft with drivers formed at both the top and bottom ends. Fig. 4 is a vertical cross-sectional view of the handle, Fig. 5
The figures are a plan view of FIG. 4, FIG. 6 is an enlarged perspective view of the collar, and FIG. 7 is a perspective view of the leaf spring. 1...Handle, 4...Shaft bar, 5...Key, 6...Color, 7...Insertion hole, 8...Keyway, 9...Groove,
DESCRIPTION OF SYMBOLS 10... Locking step part, 11... Leaf spring, 12... Bending locking part, 13... Lower end of leaf spring.

Claims (1)

[Scope of utility model registration request] A collar 6, which is provided with an opening that matches the outer diameter of the shaft rod 4 and a key groove 8 into which a key 5 provided on the shaft rod 4 is fitted, is firmly fitted onto the upper end of the handle 1, and the shaft rod is closed. 4, a groove 9 of a required width is formed in the longitudinal direction at a suitable location on the outer side of the collar 6, and a locking step 10 is provided at the upper part of the bottom of the groove 9, so that the handle can be replaced. The bent locking part 12 formed by bending the upper stage of the leaf spring 11 which has a length of about 1/3 to half of 1 in the extended state is the locking stepped part 10.
At the same time, the leaf spring 11 is fitted into the groove 9 and the downward extension of the leaf spring 11 is inserted into the shaft insertion hole 7.
A shaft rod holding device for a replaceable screwdriver, characterized in that the shaft rod is largely curved toward the center, and its lower end is pressed into contact with the inner wall surface of the insertion hole 7.