JP2545043Y2 - Tool body locking device for various foldable tools - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus which can lock a tool body such as a blade in a used state and a non-used state in various tools such as a knife capable of folding a blade.

[0002]

2. Description of the Related Art A conventional folding knife is disclosed, for example, in JP-A-56-40175.
In this folding knife, a slide button having a lock lever is movably supported with respect to a handle, and a back metal is pressed against an outer peripheral edge of a turning support portion of the blade in a used state and a non-used state, so that the blade is each While being kept in the state, the slide button is urged by the pressing spring, and the lock lever presses the backing metal. Therefore, unless the slide button is moved against the urging force of the pressing spring, the back metal is pushed by the lock lever so that the turning support of the blade does not turn.

[0003]

In this folding knife, the blade is not rotated unless the slide button is moved, so it is safe, but the blade is rotated between the use state and the non-use state with respect to the handle. When you do, you must always move the slide button. Therefore, the moving operation was sometimes troublesome.

By the way, in such a folding knife, when the blade protruding from the handle is stored in the handle in the use state and is not used, the finger gripping the handle may touch the blade edge of the blade. Therefore, there is little danger when the blade stored in the handle is protruded from the handle.

An object of the present invention is to provide a foldable knife of the same type as that of the conventional type in which the lock structure is different between a used state and a non-used state, thereby not only maintaining safety but also improving operability. . It is another object of the present invention to apply the present invention to various tools other than the folding knife.

[0006]

As shown in the drawings of the embodiments described later, in various foldable tools according to the present invention, a tool body 2 is rotatably supported on a handle 1 and a handle 1 is provided.
The outer peripheral edge of the rotation supporting portion 3 of the tool body 2 is pressed against the spring 5 attached to the tool body 2. And this tool body 2
Project from the handle 1 in use and are held by the pressing force of the spring 5. The tool body 2 is accommodated in the handle 1 in an unused state, and is held by the pressing force of the spring 5.

An operation member 11 is movably supported by the handle 1. The operating member 11 is provided with a locking portion 15. With the movement of the operation member 11, the locking portion 15 can take a locking position for restricting the bending of the spring 5 and a non-locking position for allowing the bending of the spring 5. The locking portion 15 is urged by the elastic portion 13 and is held at the locking position by the urging force.

[0008] The rotation support portion 3 of the tool main body 2 is provided on the rotation support portion 3 from the side opposite to the locking portion 15 at the locking position with the spring 5 interposed therebetween.
A first press-contacting edge 20 that presses against the spring 5 at a non-locking position side of the locking position of the locking portion 15 in a use state of the tool body 2 is provided, and the tool body 2 is not used.
A second press-contacting edge 19 that presses against the spring 5 on the side opposite to the non-locking position from the locking position of the locking portion 15 when shifting from the use state to the use state. The spring
5 has a cam shape that is gradually pushed up .

[0009]

[0010]

As shown in FIG. 3 (a), when the tool body 2 is turned in the direction of the arrow L so that the turning support portion 3 is not used when the tool body 2 is used, the turning support portion 3 is pressed. The edge 20 pushes the spring 5, and the locking portion 15 of the operating member 11 in the locking position receives this force. In this case, since the locking portion 15 does not move to the non-locking position due to the turning force, the rotation of the rotation support portion 3 is prevented by the locking portion 15 via the spring 5. Therefore, unless the operation member 11 is forcibly moved against the urging force of the elastic portion 13, the tool main body 2 is securely locked in use.

When the operating member 11 is forcibly moved against the urging force of the elastic portion 13, the locking portion 15 is brought to the non-locking position. When the tool body 2 is turned in the direction of the arrow L so that the tool body 2 is not used in the operating state in this operation state, an appropriate turning resistance is given to the turning support portion 3 by the pressing force of the spring 5, and the tool body 2 is turned. 2 is stored in handle 1.

On the other hand, as shown in FIG. 3B, when the tool main body 2 is turned in the direction of the arrow R so as to bring the tool body 2 from the non-use state to the use state, the turning force of the operation member 11 causes 15 can move from the locked position to the non-locked position against the urging force of the elastic portion 13, so that the pressing support force of the spring 5 gives the turning support portion 3 an appropriate turning resistance, 2 protrudes from handle 1.

As described above, in the present invention, the locked state of the tool body 2 is released by forcibly operating the operation member 11 only when the tool body 2 is changed from the used state to the non-use state. When changing from the non-use state to the use state, there is no need to forcibly operate the operation member 11.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A folding knife according to an embodiment of the present invention will be described below with reference to the drawings.

A blade 2 as a tool body is rotatably supported by a support shaft 4 at a base end portion of a handle 1 with respect to a distal end of the handle 1, and as shown in FIG. And the blade 2 has a handle 1 as shown in FIG.
It can be assumed to be in an unused state stored inside the abdomen.

The base end of the leaf spring 5 is fitted to the base end of the handle 1 on the back side of the handle 1, and the leaf spring 5 extends to the distal end of the handle 1. A pressing portion 6 is formed at the tip of the leaf spring 5, and the pressing portion 6 is constantly pressed against the outer peripheral edge of the rotation support portion 3 of the blade 2. The pressing portion 6 is slightly inclined so as to approach the front side of the handle 1 and approach the front side thereof. An avoiding portion 7 is formed on the leaf spring 5 so as to be bent on the abdominal side of the handle 1 adjacent to the base end side of the pressing portion 6.

As shown in FIG. 2, a recess 8 is formed on the back side of the tip of the handle 1, and a lid 9 is detachably fitted in the recess 8. A guide groove 10 is formed on one side of the recess 8, and an operation member 11 is fitted into the guide groove 10. The operation member 11 includes a base plate portion 12 and the base plate portion 12.
An elastic part 13 integrally extending from a base end of the base plate, a knob 14 protruding outside the base plate part 12, and a base plate part 1;
2 and a locking claw 15 protruding inward from the inside. The base plate portion 12 and the elastic portion 13 are inserted into the guide grooves 10, and the base plate portion 12 is urged toward the distal end by the elastic portion 13 and stopped. An elongated hole 16 is formed in the lid 9, and the knob 14 is exposed to the outside of the lid 9 through the elongated hole 16. A long hole 17 is formed in the guide groove 10, and the locking claw 15 is
7 and is inserted into the handle 1. An end portion 18 is formed between the pressing portion 6 and the avoidance portion 7 in the leaf spring 5, and the locking claw 15 abuts on the end portion 18.

As shown in FIGS. 3 (a) and 3 (b), in the rotary support portion 3 of the blade 2, a pressing edge 19 continuous with the cutting edge 2a and a pressing edge 20 continuous with the back portion 2b are connected to each other. It is formed. In the pressing edge 19 on the side of the cutting edge 2a, of the radius from the center of the rotation support portion 3, the radius at a portion 19a continuous with the cutting edge 2a is A, and the other pressing edge 2
Assuming that the radius at the top 19b at the boundary with 0 is B, the radius A becomes minimum and the radius B becomes maximum, and the radius of the press-contact edge 19 gradually increases from this portion 19a to the top 19b. In the press contact edge 20 on the side of the back portion 2b, the radius of the portion 20a continuous with the back portion 2b is A, and the portion 20 at the boundary with the other press contact edge 19 is
When the radius at b is B and the radius at the top 20c between these portions 20a and 20b is C, this radius C is the largest, and is between the portion 20a and the top 20c and between the portion 20b and the top 20c. The press contact edge 20 extends linearly.

In the use state shown in FIG. 3A, the top 20c of the press contact edge 20 abuts the end 18 of the leaf spring 5 slightly proximal to the center 15a of the locking claw 15, and the portion of the press contact edge 20 20
a is the pressing portion 6 of the leaf spring 5 on the distal end side of the center 15a.
Is in contact with When the blade 2 is rotated in the direction of the arrow L in order to make the blade 2 in the non-use state from the use state, the force acts as a vertical component force that lifts the end portion 18 of the leaf spring 5 and deflects the pressing portion 6, and It also acts as a horizontal component F along the moving direction of the operation member 11. This vertical component is applied to the locking claw 1
5, the end portion 18 of the leaf spring 5 is not lifted by the vertical component force, and the blade 2 does not rotate. on the other hand,
Since the horizontal component F acts in the biasing direction of the elastic portion 13 of the operating member 11, the locking claw 15 of the operating member 11 does not move against the biasing force of the elastic portion 13 and the locking position Is held. Therefore, as long as the operation member 11 is not forcibly moved, the blade 2 is reliably locked in use.

In order to release the locked state, when the knob 14 of the operation member 11 is moved toward the base end against the urging force of the elastic portion 13, the locking claw 15 is moved to the end 1 of the leaf spring 5.
8, the pressing part 6 and the end part 18 of the leaf spring 5 can be bent in the space above the avoiding part 7. Therefore, when the blade 2 is rotated in the direction of the arrow L in this state, the blades 2 are pressed while the respective press-contact edges 19 and 20 of the rotation support portion 3 are pressed by the leaf springs 5 to provide an appropriate rotation resistance. It is stored in the handle 1. Then, when the knob 14 is released from the operation member 11, the locking claw 15 again comes into contact with the end portion 18 of the leaf spring 5 due to the urging force of the elastic portion 13, and the non-use state shown in FIG.

In this non-use state, the vicinity of the portion 19a of the press contact edge 19 which is continuous with the cutting edge 2a is in contact with the pressing portion 6 of the leaf spring 5. When the blade 2 is rotated from the non-use state to the use state in the direction of the arrow R, the force acts as a vertical component for lifting the pressing portion 6 and the horizontal component F along the moving direction of the operation member 11. Works as well. In particular, this horizontal component F is applied to the elastic portion 1 of the operating member 11.
3, the locking claw 15 of the operating member 11 moves toward the avoiding portion 7 against the urging force of the elastic portion 13 due to the horizontal component force F. It moves away from the end 18 to the unlocked position. Accordingly, the blades 2 are turned and come into a use state while the press contact edges 19 and 20 of the turning support portion 3 are pressed by the leaf springs 5 and an appropriate turning resistance is applied.

As described above, in the present embodiment, in view of the fact that the danger is particularly high when the blade 2 is changed from the use state to the non-use state, the blade 2 is reliably secured by the operating member 11 only in such a case. The locked state cannot be released unless the operation member 11 is forcibly moved by being locked. Therefore, as described above, when the blade 2 is changed from the non-use state to the use state, it is not necessary to operate the operation member 11 at all, so that safety can be maintained and operability can be improved. .

In the above-described embodiment, the rotation support portion 3, the leaf spring 5, and the operating member 11 are set as shown in FIG. 3, but in short, it is determined whether the turning force of the blade 2 acts as the moving force of the operating member 11. Since this poses a problem, the positional relationship between the rotation support portion 3, the leaf spring 5, and the locking claw 15 of the operation member 11, and the operation member 1
Various changes may be made without departing from the spirit of the present invention, such as the biasing direction of the elastic portion 13.

In the above-described embodiment, the present invention is embodied as a folding knife. However, the present invention may be embodied as another folding tool, for example, a saw, a bottle opener or a canker.

[0025]

In the various foldable tools according to the present invention, the lock state can be released by forcibly operating the operation member 11 only when the tool body 2 is changed from the use state to the non-use state. Not only safety can be maintained, but also operability can be improved.

[Brief description of the drawings]

FIG. 1 (a) is a front view showing a use state of a folding knife according to the present embodiment, and FIG. 1 (b) is a front sectional view thereof.

2 (a) is a front view showing a state where a lid is removed from the folding knife shown in FIG. 1 (a), and FIG. 2 (b) is a sectional view taken along line XX of FIG. 1 (a). is there.

FIG. 3 (a) is a partially enlarged view of FIG. 1 (b),
FIG. 4B is a partially enlarged view of FIG.

FIG. 4 (a) is a front view showing a non-use state of the folding knife according to the present embodiment, and FIG. 4 (b) is a front sectional view thereof.

[Explanation of symbols]

1 handle, 2 blade (tool body), 2a blade, 2b back, 3 rotation support, 4 support shaft, 5 leaf spring, 6 pressing section, 7 avoiding section, 11 operating member, 12 base plate section, 13
Elastic part, 14 knobs, 15 locking claw (locking part) , 1
8 end, 19 first crimping edge, 20 second crimping edge.

Claims (1)

(57) [Scope of request for utility model registration] A tool (2) is rotatably supported on a handle (1), and the tool body (2) is used in a state where the tool body (2) protrudes from the handle (1). 1) A non-use state stored in the tool body (2) is achieved by a spring (5) attached to the handle (1).
In the various folding-type tools capable of holding the above-mentioned states by pressing the outer peripheral edge of the rotation support portion (3), the operation member (11) is movably supported on the handle (1). The locking part (15) of the operating member (11) is the spring (5)
And the locking portion (15) can assume a non-locking position where the locking portion (15) allows the bending of the spring (5). An elastic portion (13) for constantly biasing the operation member (11) in a direction in which the stop position can be taken is provided, and the spring (5) is sandwiched between a rotation support portion (3) of the tool body (2). When the tool body (2) is in use, the locking portion (1) is positioned from the side opposite to the locking portion (15) in the locking position.
A first press-contact edge (20) that presses against the spring (5) on the non-locking position side of the locking position of 5) is provided.
At the same time , the tool body (2) is shifted from the unused state to the used state.
A second press-contact edge (19) that presses against the spring (5) on the side opposite to the non-lock position relative to the lock position of the lock portion (15), and the second press-contact edge (19). 19) the spring
(5) A lock device for a tool main body in various types of foldable tools, which has a cam shape for gradually pushing up .