JPS604705Y2 - Penetrating driver - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a penetrating screwdriver.

The screwdriver has a through-type screwdriver, in which the driver rod is fitted into a through hole formed in the grip so as to protrude outward from one end, and the shaft rod is press-fitted from the other end so as to come into contact with the driver rod. There is something.

However, with this type of driver, if the shaft rod is simply press-fitted into the through hole, the shaft rod will receive a large force from the driver rod in the opposite direction to the press-fitting direction during use, and the shaft rod and driver rod will be forced to move in the axial direction. It becomes loose easily.

Therefore, a threaded portion is formed on the shaft rod, or a cylindrical portion is formed at the insertion end of the shaft rod, and the driver rod is forcibly fitted into the cylindrical portion inside the grip portion. There are some that are configured to expand in the radial direction.

However, in these cases, the configuration was extremely complicated, and it was also difficult to incorporate the shaft.

In view of the above-mentioned problems, the present invention has a simple structure that allows the shaft rod to be firmly and easily assembled.The present invention is characterized by a grip having a through hole, and one end of which is inserted into the through hole. In a through-type driver that includes a driver rod that is fitted in an outwardly protruding shape and a shaft rod that is press-fitted into a through hole from the other end and abuts the driver rod, the outer peripheral surface of the shaft rod has a radially outer surface. An axial locking piece is provided that protrudes in the direction, and a retaining portion that protrudes radially outward or circumferentially from the press-fitting direction is provided on the opposite side of the locking piece from the press-fitting direction of the shaft rod. The point is that

Hereinafter, the present invention will be explained according to the illustrated embodiments.
In the drawings to FIG. 3, reference numeral 1 denotes a grip portion made of a hard synthetic resin such as acrylic resin manufactured by extrusion molding, and a through hole 2 is formed in the grip portion 1 in the axial direction.

The through hole 2 continuously includes a first hole portion 3 and a second hole portion 4 having a larger diameter than the first hole portion 3, and a large diameter hole portion 5 is formed at the open end of the second hole portion 4.

Reference numeral 6 denotes a driver rod, which is fitted into the first hole 3 in an outwardly projecting manner, and has a bit 7 machined into a minus or plus shape at its outer tip.

An appropriate number of anti-rotation pieces 8 parallel to the axial direction are provided in the middle of the inner side of the driver rod 6 so as to protrude outward in the radial direction, and the inner end of the driver rod 6 is inserted into the second hole 4. It stands out.

9 is a round bar-shaped shaft rod, comprising a shaft portion 10 and a head 11;
The end surface of the head 11 is a striking surface 11a.

The shaft portion 10 is press-fitted into the second hole portion 4 from its open end, and its tip is in contact with the driver rod 6.

The head 11 is fitted into the large diameter hole 5 so that its striking surface 11a is exposed to the outside.

12 is an axial locking piece protruding from the outer peripheral surface of the shaft portion 10;
It is formed into a plate shape by press molding so as to protrude outward in the radial direction from the shaft portion 10, and the locking pieces 12 are provided in pairs in the axial direction so as to correspond to the shaft portion 10 in the diametrical direction.

Note that the number and protruding positions of the locking pieces 12 are not limited to the illustrated example.

Reference numeral 13 denotes a recess formed on the outer circumferential surface of the shaft portion 10 when the locking piece 12 is press-molded.

Reference numeral 14 denotes a retaining portion, which is formed on the side opposite to the press-fitting direction of the shaft rod 9 of each locking piece 12 so as to protrude radially outward from the press-fitting direction side.

This retaining portion 14 is formed simultaneously with the locking piece 12 by pressing the side opposite to the press-fitting direction with a large force when press-molding the locking piece 12.

Reference numeral 15 denotes a recess formed in the locking piece 12 when the retaining portion 14 is press-molded.

According to the configuration of the above embodiment, when the shaft portion 10 of the shaft rod 9 is press-fitted into the second insertion hole 4, there is a locking piece 12 that protrudes outward on the outer circumferential surface of the shaft portion 10. However, since the locking piece 12 is located in the axial direction, the resistance is not significantly greater than that of conventional products in which a threaded portion is formed on the shaft rod 9. Therefore, the shaft rod 9 can be easily tightened. Can be incorporated.

After installation, use the arrow a from the driver rod 6.
However, since there is a retaining portion 14 that protrudes outward in the radial direction on the opposite side to the press-fitting direction of the locking piece 12,
This provides a large resistance to the force in the direction of arrow a.

Therefore, the shaft rod 9 is firmly fixed, and the shaft rod 9 and the driver rod 6 are prevented from shaking in the axial direction.

4, 5 to 7, 8 and 9 respectively show other embodiments, and FIG. 4 shows the locking piece 1 in the above embodiment.
In this example, a notch 15' is formed in place of the recess 15 of No. 2.

5 to 7, a pair of locking pieces 12 are formed to be long in the axial direction, and a notch 16 is provided at the end opposite to the press-fitting direction of the locking piece 12. By curving the upper part of 16 to one side in the circumferential direction, a retaining part 14 is formed on the side opposite to the press-fitting direction of the locking piece 12 and protrudes in the circumferential direction from the press-fitting direction side. This is similar to the example.

Further, in FIGS. 8 and 9, four axial locking pieces 12 are formed radially on the outer circumferential surface of the shaft portion 10 so that the side opposite to the press-fitting direction gradually protrudes outward in the radial direction. The locking piece 12
The side opposite to the press-fitting direction is a retaining portion 14 that protrudes radially outward from the press-fitting direction side.

According to the present invention, since the locking piece 12 provided on the outer peripheral surface of the shaft rod 9 so as to project outward in the radial direction is located in the axial direction, the locking piece 12 is provided when the shaft rod 9 is inserted into the through hole 2. The stopper piece 12 does not create much resistance, and the shaft rod 9 can be easily assembled.

Furthermore, on the opposite side of the locking piece 12 from the press-fitting direction of the shaft rod 9, there is provided a retaining portion 12 that protrudes radially outward or circumferentially from the press-fitting direction. In this case, the retaining portion 12 provides a large resistance to force in the direction opposite to the press-fitting direction, so that the shaft rod 9 can be firmly fixed, and the shaft rod 9 and the driver rod 6 are prevented from shaking in the axial direction.

Moreover, since the locking piece 12 is simply provided on the shaft rod 9, the construction is extremely simple, and the practical effects are great, such as being easy to manufacture and providing at a very low cost.

[Brief explanation of the drawing]

Fig. 1 is a half-top sectional view showing one embodiment of the present invention, Fig. 2 is a rear view of the same, Fig. 3 is an enlarged side sectional view of the same essential parts, and Fig. 4 is a side view showing another embodiment. , FIG. 5 is a side view showing still another embodiment, FIG. 6 is a plan view of the same, and FIG. 7 is a side view showing another embodiment.
A sectional view taken along line A; FIG. 8 is a side view showing yet another embodiment;
FIG. 9 is a sectional view taken along the line B--B in FIG. 8. 1...Grip part, 2...Through hole, 6...
...Driver rod, 9...Shaft rod, 12...
... Locking piece, 14 ... Removal prevention part.

Claims (1)

[Scope of utility model registration request] A grip part 1 having a through hole 2, a driver rod 6 fitted into the through hole 2 so as to protrude outward from one end thereof, and a driver rod 6 which is press-fitted into the through hole 2 from the other end side and abuts the driver rod 6. In the penetrating type driver equipped with a shaft rod 9, an axial locking piece 12 is provided on the outer peripheral surface of the shaft rod 9 and projects radially outward, and the locking piece 12 is arranged in the press-fitting direction of the shaft rod 9. A through-type % type % characterized in that a retaining part 14 is provided on the opposite side from the press-fitting direction side and protrudes radially outward or circumferentially from the press-fitting direction side.