JP7130716B2 - Tweezers with locking mechanism - Google Patents

Description

TECHNICAL FIELD The present invention relates to tweezers with a lock mechanism capable of holding an arbitrary object pinched with the tip of the tweezers.

In general, a wide range of articles such as vehicles such as automobiles and motorcycles, machines, models, and handicrafts are coated for the purpose of aesthetic decoration and corrosion protection.
When such painting is performed, it is common to apply a protective adhesive tape (masking tape) in order to cure (protect) areas other than the painted area from contamination.

Taking a motorcycle as an example, decorative letters and patterns are often drawn by spray painting on synthetic resin windshield parts (cowls) that cover the vehicle body and passengers, fuel tanks, etc.
When spray painting, in order to finish the characters and patterns beautifully as desired, the surface to be painted must be exposed in the exact same shape and dimensions as the desired characters and patterns, and masking tape is applied around the surface to be painted. do.
In particular, if the design is very complicated with the desired characters and patterns, cut a part of the masking tape with a design knife as if hollowing it out, and then pick up an unnecessary small piece of the cut masking tape with tweezers and remove it. remove.

Tweezers are generally useful when handling objects that are difficult to pick up directly with bare hands or fingertips, such as pieces of masking tape and minute parts as described above.
Tweezers, which are readily available on the market, are usually configured in a "dogleg" shape that is physically integrated by joining one end of two rod-shaped members to each other.
An arbitrary object can be clamped between the tips of the rod-like members on the opposite side of the joint.

Common tweezers having such a structure have a restoring force.
Therefore, when the force applied by the user is relaxed, the distance between the two rod-shaped members that were brought closer to each other increases due to the restoring action that tries to return to the original shape, and the tips that were close to each other also move away from each other. .
As a result, the work object restrained (pinched) at the tips of the tweezers is released.

Therefore, when using conventional tweezers to handle a work object, in order to keep the same object sandwiched between the tips of the tweezers, the user of the tweezers must move the two rod-shaped members closer to each other. must continue to exert force on
Maintaining the state in which the tips of the two rod-like members are brought close against the restoring force of the tweezers in this way requires a considerable amount of force. There is a problem that the burden is heavy and the user gets tired.

In order to improve the above-described problems, tweezers with a locking mechanism capable of maintaining (locking) the state in which the work object is held have been proposed in the past (see Patent Documents 1 and 2).

JP 2019-030955 A Japanese Patent No. 6590288

[Technology of Patent Document 1]
According to the technique of Patent Document 1, long holes 3 along the longitudinal direction are provided in two rod-shaped members that constitute the tweezers 2 (Paragraph 22 of Patent Document 1, FIG. 1).
A bolt 4 is inserted in this long hole, and when the bolt 4 is slid toward the open end of the tweezers 2 (the clamping portions 2a for clamping the object), the pair of clamping portions 2a that are brought closer are restrained. As a result, the gripped object can be kept fixed (Patent Document 1, FIG. 2(b), paragraph 25).
Furthermore, in Document 1, a nut 5 is attached to the bolt 4 described above, and by tightening the bolt 4 and the nut 5, the force of pinching the object pinched by the pinching portion 2a of the tweezers 2 is strengthened. (Ref. 1, paragraph 26).

In addition, in Patent Document 1, in order to release (remove) the object to be held that is sandwiched between the gripping portions 2a of the tweezers 2, the bolt 4 inserted into the long hole 3 is inserted into the joint portion (connecting portion) of the tweezers. An operation of sliding to the side of part 2c) is required.
Note that the joint portion of the tweezers refers to a bent portion in the shape of a dogleg where two rod-like members constituting the tweezers are joined together.

In addition, in the tweezers 1 with a lock function according to Patent Document 1, the outer side surfaces (the outer side surface of the inner and outer side surfaces) of the two rod-shaped members constituting the tweezers 2 are respectively provided with the heads of the bolts 4 or the nuts. 5 is protruding.
The outer surface of the tweezers rod-shaped member is a portion operated by the user when closing or opening the tips 2a of the tweezers.
More specifically, when the user closes the tips of the tweezers and picks up the work object, the user puts the thumb on the outer surface of one rod-shaped member and the index finger on the outer surface of the other rod-shaped member. Close the tweezers by applying force to the area where the is touching.
Therefore, in Patent Document 1, it is difficult to pinch (pinch) the work object with the tweezers, which is the step before locking the tweezers 2 (before sliding the pair of bolt 4 and nut 5 toward the tip of the tweezers). It may become

As described above, in Patent Document 1, when locking the tweezers, the pair of bolt 4 and nut 5 is physically slid toward the tip of the tweezers.
Also, when unlocking the tweezers, the pair of bolt 4 and nut 5 that was moved when locking was shifted in the opposite direction (direction toward the joint part of the tweezers) when locking. Re-operation is required.
In other words, in the tweezers 1 with a lock function of Patent Document 1, in "both" when locking and unlocking the tweezers 2, the pair of the bolt 4 and the nut 5 must be "labor physically moved" sequentially. necessary.

[Technology of Patent Document 2]
Next, the technique of Patent Document 2 will be examined.
In the technique of Patent Document 2, a button portion 21 is provided on one outer surface (holding portion 3a) of the rod-shaped member of the tweezers 1 (Publication 2, FIG. 1(a), paragraph 46).
By operating this button portion 21, the hook portion 31 is locked or unlocked.
Also in Patent Document 2, the button portion 21, which is a physical component, "protrudes from the outer surface" of one rod-shaped member of the tweezers 1 .
Therefore, there is a risk of impairing work comfort when grasping the work object with the tweezers, which is work before locking.

In addition, in the technique of Patent Document 2, the lifting ratchet 23 having a plurality of convex teeth 23b is engaged with the button portion 21 (Paragraph 46 of Patent Document 2).
Due to the restraining action of the lifting ratchet 23, the hook-like hook 33 can move forward only in one predetermined direction and cannot move backward.
Therefore, in the technique of Patent Document 2, even when unlocking, it is necessary to perform the "re-operation to physically shift the button portion 21" used when locking (Paragraph 46 of Patent Document 2). third sentence).
Then, when the convex teeth 23b move outward from the inner surface 11a of the grip portion 3a on which the button portion 21 is installed, the engagement with the hook-like hook 33 is released and the lock is released (Patent Reference 2, paragraph 67, FIG. 4(C)).

The present invention has been made in view of the above problems, and the tweezers having a locking mechanism are characterized by: (1) arranging a part for performing a locking operation on the outer surface of two rod-shaped members constituting the tweezers; (2) When releasing the held object clamped at the open end of the tweezers from the open end, the parts used for locking are physically re-operated. The purpose is to realize it with a simpler operation than before by eliminating the need for

[First invention]
Therefore, in order to solve the above problems, the locking mechanism-equipped tweezers according to the first invention of the present application includes:
A tweezers with a locking mechanism that can maintain a state of holding an arbitrary object,

Tweezers having a "dogleg" shape physically integrated by joining one end of two rod-shaped members to each other, and capable of pinching any object with the tips of the two rod-shaped members on the opposite side of the joint. When,
a guide groove made of a hollow structural member provided along the axial direction on the inner surface of one of the two rod-shaped members;
a sliding shaft made of a rod-like member with a fine core and slidably inserted through the guide groove;
a slider that is a member fixed to the sliding shaft and is operated by a user;
a slider position return mechanism, which is an elastic member connected between a predetermined portion of the tweezers and one end of the slide shaft and is engaged with the predetermined portion of the tweezers and one end of the slide shaft;
A thin core member provided on the inner surface of one or both of the two rod-shaped members so as to stand against the inner surface, and is arranged at a position closer to the tip of the tweezers than the guide groove. a mooring member that
with

A locking mechanism consisting of a sliding shaft and a mooring member that intersects with the sliding shaft,
(1) When the user applies force to the outer surfaces of the two rod-shaped members, the rod-shaped members approach each other, and an object is held between the tips of the tweezers.
When the slider is pushed toward the tip of the tweezers, the sliding shaft and the anchoring member are engaged to maintain the state in which the object is held between the tips of the tweezers.
(2) When the user applies a force in a direction to bring the two rod-like members closer together while the object is held by the sliding shaft and the mooring member being engaged,
The engagement state between the sliding shaft and the anchoring member is released, and the two rod-like members of the tweezers move away from each other due to the restoring force of the tweezers, releasing the object held between the tips of the tweezers.
The slide shaft and the slider are configured to return to the predetermined unlocked position by the elastic force exerted by the slider position return mechanism.

As described above, according to the tweezers of Patent Documents 1 and 2, the locking function itself of maintaining the state in which the object is held between the tips of the tweezers is realized.
However, in both documents 1 and 2, the components of the lock mechanism protrude from the outer side surface of the tweezers (the outer side surface of the bar-shaped member of the tweezers).
Specifically, in Patent Document 1, the projecting components are the head portion 4a of the bolt 4, the tip portion of the shaft 4b, and the nut 5 (see Patent Document 1 and FIG. 1). Then, the button portion 21 corresponds to this (Refer to Document 2 and FIG. 1(b)).
When tweezers are used to pinch an object, due to the structure of the tweezers, the thumb and forefinger should be placed on both outer surfaces of the two rod-shaped members so as to narrow the distance between the two rod-shaped members (the two rod-shaped members force is applied so that the rod-like members approach each other).
In view of such a usage situation, the structure in which parts are physically arranged on the outer surface of the tweezers rod-shaped member, as in Patent Documents 1 and 2, is difficult for the user to grasp the object with the tip of the tweezers. There is a risk that the part may bite into the finger when force is applied to the part, which is not desirable.

On the other hand, according to the first invention, the lock mechanism (the combination of the sliding shaft 211 and the anchoring member 3) is entirely housed inside the tweezers (between the two rod-like members 11 and 12).
Furthermore, the operating element (slider 211) used for locking also protrudes slightly upward from the gap between the two rod-shaped members 11 and 12 (FIG. 1).
Thus, in the first invention, both the lock mechanism and the slider 211 are accommodated in the space inside the tweezers 1, and no physical components are arranged on both outer surfaces of the two tweezers rod-shaped members 11 and 12. not
In other words, the tweezers 100 according to the first aspect of the invention have the same appearance, particularly the outer surface of the tweezers, as a general tweezers without a locking mechanism.
Therefore, when the tweezers 100 of the first invention are used to pick up an object with the tips of the tweezers, even if the user puts his or her fingers on the outer surfaces of the bar members 11 and 12 and applies force, any Since the parts do not come into contact with fingers, you can get the same feeling of use as ordinary tweezers.

Further, when the user pushes the slider 211 toward the tip of the tweezers 1 (see FIG. 5(a)) while an object (not shown) is sandwiched between the tips of the tweezers 1 (FIG. 3), the slider 211 slides. The driving shaft 211 and the anchoring member 3 are engaged (see FIG. 5(b)), and the state in which the object is held between the tips of the tweezers is maintained (FIG. 4).
As a result, the "locking function" is exhibited in a state in which the object is clamped.
That is, the locking function can be stably achieved by a very simple operation of moving the sliding shaft 211 to the position of the mooring member 3 so that the mooring member 3 as a locking element exerts a locking action on the sliding shaft 211 . (Fig. 4).
In addition, in the first invention, the anchoring member 3 can be provided inside one or both of the two rod-like members.
In the example of FIG. 1, the mooring member 3 is attached to the bar member 11 on which the guide groove 22 is not provided.

Furthermore, when the locking function is released from the state in which the sliding shaft 211 and the mooring member 3 are engaged and the object is held (locked) (FIG. 4), the following operation is performed. .
In the locked state, as shown in FIG. 6, when a force is applied by the user in a direction to bring the two rod-shaped members 11 and 12 closer together, the sliding shaft 211 and the mooring member 3 are separated from each other. is disengaged.
Then, the two rod-like members 11 and 12 move away from each other due to the restoring force of the tweezers 1, and the object held between the tips of the tweezers is released.
Further, when the sliding shaft 211 and the mooring member 3 are disengaged, the sliding shaft 211 and the slider 212 move from the locked position in the locked state to the tweezers joint portion JN due to the elastic force exerted by the slider position return mechanism 23. It is drawn in toward the front and automatically (without human intervention) returns to a predetermined unlocked position.
That is, according to the first invention, the lock function can be released without manual operation of the slider 212 (operation of moving the slider 212 to the unlocked position).
In addition, in the first invention, the slider position return mechanism 23 for returning the slide shaft 211 and the slider 212 to the unlocked position is connected between a predetermined portion of the tweezers 1 and one end of the slide shaft 211 (FIG. 1). .
A predetermined portion on the tweezers side to which the slider position return mechanism 23 is engaged is the joint portion JN (dogleg portion) of the tweezers 1 in the example of FIG.
However, any location may be selected as the predetermined location as long as the elastic force of the slider position return mechanism 23 acts in the direction of retracting the sliding shaft 211 and the slider 212 to the unlocked position.

[Second Invention]
Further, in order to solve the above problems, the tweezers with a lock mechanism according to the second invention of the present application are:
A tweezers with a locking mechanism that can maintain a state of holding an arbitrary object,

Tweezers having a "dogleg" shape physically integrated by joining one end of two rod-shaped members to each other, and capable of pinching any object with the tips of the two rod-shaped members on the opposite side of the joint. When,
a guide groove made of a hollow structural member provided along the axial direction on the inner surface of one of the two rod-shaped members;
a sliding shaft made of a rod-like member with a fine core and slidably inserted through the guide groove;
a slider, which is a wedge-shaped small piece member fixed to the tip of the sliding shaft and having a tip that tapers toward the tip, and is operated by a user;
a slider position return mechanism, which is an elastic member connected between a predetermined portion of the tweezers and one end of the slide shaft and is engaged with the predetermined portion of the tweezers and one end of the slide shaft;
a mooring member provided on the inner surface of one or both of the two rod-shaped members and having a guide wall for guiding the slider;
with

A lock mechanism consisting of a slider and a mooring member that guides the slider along the guide wall,
(1) When the user applies force to the outer surfaces of the two rod-shaped members, the rod-shaped members approach each other, and an object is held between the tips of the tweezers.
When the slider is pushed toward the tip of the tweezers, the slider advances along the guiding wall of the mooring member, and then the object is pushed to the tip of the tweezers based on the frictional force acting on the slider and the mooring member that are in contact with each other. The sandwiched state is maintained,
(2) When the slider and the mooring member are engaged to hold the object, and the user applies a force in a direction to bring the two rod-like members closer together,
When the slider and the mooring member that were in contact with each other separated, the frictional force acting on the slider disappeared, and the restoring force of the tweezers caused the two rod-shaped members of the tweezers to move away from each other, and were held between the tips of the tweezers. As the object is released,
The slider is configured to return to a predetermined unlocked position by the elastic force exerted by the slider position return mechanism.

According to the second invention, as in the first invention, the lock mechanism (combination of the slider 25 and the mooring member 3A shown in FIG. 7) is entirely housed inside the tweezers (between the two bar members 11 and 12). ing.
Furthermore, the operating element (slider 25) used for locking is also at substantially the same height as the edges (ridge lines) of the two rod-shaped members 11 and 12 (FIG. 7).
Thus, in the second invention, the lock mechanism is accommodated in the space inside the tweezers 1, and no physical components are arranged on both outer surfaces of the two tweezers rod-shaped members 11 and 12.
That is, the tweezers with a lock mechanism 100A (FIG. 7) according to the second invention is also comparable in appearance to general tweezers without a lock mechanism in terms of the outer surface of the tweezers.
For this reason, when the tweezers 100A of the second invention is used to pick up an object with the tips of the tweezers, even if the user puts his or her fingers on the outer surfaces of the rod-shaped members 11 and 12 and applies force, any Since the parts do not come into contact with fingers, you can get the same feeling of use as ordinary tweezers.

When the user pushes the slider 25 toward the tip of the tweezers 1 while an object (not shown) is sandwiched between the tips of the tweezers 1 (FIG. 9), the slider 25 engages with the anchoring member 3A. (Fig. 10), and the object is held between the tips of the tweezers.
This will "activate the locking function".

Furthermore, in the second invention, the overall shape of the slider 25 is a wedge shape tapering toward the point, and the point is engaged with the anchoring member 3A to be locked.
That is, in the slider 25 of the second invention, both the role played by the slider 212 and the role played by the sliding shaft 211 in the first invention (see FIG. 5(b)) are integrated.
Therefore, the locking function of the tweezers can be realized with a simpler configuration and a smaller number of parts than the first invention.
Therefore, the manufacturing cost of the tweezers with locking mechanism 100A can be reduced, and the manufacturing process can be simplified.

The slider and the mooring member may be mutually provided with fine tooth-like irregularities (protrusions) like the slider 25C and the mooring member 3C shown in FIG. 17(a).
This makes it difficult for the slider 25C and the mooring member 3C to be displaced from each other while they are engaged with each other.

In addition, the number of mooring members provided on the tweezers 1 is not limited to one, and one each may be provided on each of the rod-shaped members 11 and 12, like the mooring member 3D shown in FIG. 17(b). .
When the mooring members 3D are provided on each of the rod-like members 11 and 12, the mooring members 3D are arranged at different positions so as not to interfere with opening and closing of the tweezers due to mutual collision of the mooring members.

[Third invention]
Further, in order to solve the above problems, the third invention of the present application provides the tweezers with a lock mechanism according to the first and second inventions,
The slider position return mechanism is a spring.

According to the third invention, the slider position return mechanism 23 is composed of a "spring" (FIGS. 2 and 8).
Spring 23 may be a conventional coil spring having a cylindrical shape.
Since springs are widely distributed in the market as general-purpose parts, there is an advantage that manufacturing costs can be reduced.

The material of the spring 23 should only generate elastic force corresponding to the magnitude of the external force, and any material such as metal or synthetic resin can be used.
Furthermore, as the "spring" that constitutes the slider position return mechanism 23, an air spring that is displaced according to the contraction/expansion of the gas filled in the piston may be employed.
Also, the slider position return mechanism can be configured using magnetic forces exerted by magnets having different polarities.

[Fourth invention]
Further, in order to solve the above problems, the third invention of the present application provides the tweezers with a lock mechanism according to the first and second inventions,
The slider position return mechanism is configured to be a rubber cord.

According to the fourth aspect of the invention, a "rubber cord" widely available in the market and inexpensive is employed as the slider position return mechanism (component 23B in FIG. 16).
This simplifies the configuration of the tweezers with a lock mechanism and reduces the weight.
In addition, the use of the rubber cord 23B simplifies the manufacturing process and reduces the manufacturing cost, so that the selling price can be set at a low price and the product can be widely used.
Moreover, even if the rubber cord 23B is damaged, the cost and time required for repair can be greatly reduced because replacement parts are inexpensive.

[Fifth invention]
Further, in order to solve the above problems, the fifth invention of the present application provides the tweezers with a lock mechanism according to the first to fourth inventions,
a screw insertion hole provided in the guide groove;
a shaft position fixing mechanism comprising a screw member screwed into the screw insertion hole;
further comprising

(1) When the object is held between the tips of the tweezers due to the frictional force acting on the slider and the mooring member that are in contact with each other,
Furthermore, when the sliding shaft in the guide groove is tightened by the screw member forming the shaft position fixing mechanism, the position of the sliding shaft is fixed,
The engagement state between the slider and the mooring member is maintained even when a force is applied by the user in a direction to bring the two rod-shaped members closer together,
(2) After the tightening of the sliding shaft by the shaft position fixing mechanism is relaxed and the position of the sliding shaft is released, a force is applied by the user in a direction to bring the two rod-shaped members closer together. When,
The slider and the mooring member that were in contact with each other separate, the frictional force acting on the slider disappears, and the restoring force of the tweezers causes the two rod-like members of the tweezers to move away from each other, and are held between the tips of the tweezers. As the object is released,
The slider is configured to return to a predetermined unlocked position by the elastic force exerted by the slider position return mechanism.

According to the fifth invention, a shaft position fixing mechanism (screw member 26) is added (FIG. 18) to the configuration of the second invention (FIG. 7).
Therefore, in the fifth invention, when the object is held between the tips of the tweezers in the second invention (Fig. 10), the shaft position fixing mechanism (screw member 26) slides as shown in Fig. 20(a). By tightening the driving shaft 24, the sliding shaft 24 can be restrained (see FIG. 20(b)).
Thereby, as shown in FIG. 19, the position of the sliding shaft 24 remains fixed.

In the state shown in FIG. 19, even if a force is applied by the user in a direction to bring the two rod-shaped members 11 and 12 closer together, the slider 25 is still connected to the sliding shaft 24, so that the slider 25 does not move. movement is restricted.
Therefore, even if the elastic force of the slider position return mechanism 23 is applied to the slider 25, the slider 25 cannot be returned to the predetermined unlocked position, and the engagement state between the slider 25 and the mooring member 3A is maintained (see FIG. 19). ).
That is, in the fifth invention, the state in which the object is held (locked) by the tips of the tweezers is maintained (locked) without being affected by an external force applied in a direction to bring the two rod-like members 11 and 12 closer together. can be kept.

[Sixth invention]
Further, in order to solve the above problems, the sixth invention of the present application provides the tweezers with a lock mechanism according to the first to fourth inventions,
a turning member insertion hole provided in the guide groove;
Axial position consisting of a circular or elliptical rotating member inserted into the guide groove through the rotating member insertion hole, and a rotating shaft inserted through the rotating member to attach the rotating member to the guide groove. a fixing mechanism;
further comprising

(1) When the object is held between the tips of the tweezers due to the frictional force acting on the slider and the mooring member that are in contact with each other,
Furthermore, when the sliding shaft in the guide groove is pressed down by pressure from the rotating member forming the shaft position fixing mechanism, the position of the sliding shaft is fixed,
The engagement state between the slider and the mooring member is maintained even when a force is applied by the user in a direction to bring the two rod-shaped members closer together,
(2) After the pressure from the rotating member to the sliding shaft is weakened and the fixed position of the sliding shaft is released, when the user applies a force in a direction to further bring the two rod-shaped members closer together,
The slider and the mooring member that were in contact with each other separate, the frictional force acting on the slider disappears, and the restoring force of the tweezers causes the two rod-like members of the tweezers to move away from each other, and are held between the tips of the tweezers. As the object is released,
The slider is configured to return to a predetermined unlocked position by the elastic force exerted by the slider position return mechanism.

According to the sixth invention, a rotating member 26A is added (FIG. 21) to the configuration of the second invention (FIG. 7).
Therefore, in the sixth invention, when the state in which the object is held between the tips of the tweezers is locked in the second invention (FIG. 10), the guiding groove 22 is pushed by the rotating member 26A as shown in FIG. 23(a). The coaxial 24 can be restrained by holding down the sliding shaft 24 inside.
As a result, the position of the sliding shaft 24 remains fixed (FIG. 22).
When the position of the sliding shaft 24 is fixed as shown in FIG. 23(a), the slider 25 does not slide even if the user applies a force to bring the two rod-like members 11 and 12 closer together. Since it is connected to the shaft 24, the movement of the slider 25 is restricted.
Therefore, even if the elastic force of the slider position return mechanism 23 reaches the slider 25, the slider 25 cannot return to the predetermined unlocked position, and the engagement state between the slider 25 and the mooring member 3A is maintained.
That is, in the sixth invention, the state in which the object is held (locked) by the tips of the tweezers is maintained (locked) without being affected by the external force applied in the direction of bringing the two rod-like members 11 and 12 closer together. (Fig. 22).

[Seventh invention]
In order to solve the above problems, the seventh invention of the present application provides the tweezers with a lock mechanism according to the first, third and fourth inventions,
A cutting blade slider fixed to the cutting blade, provided slidably along the axial direction of the tweezers rod-shaped member;
further comprising

When the user shifts the cutting blade slider, the cutting blade is pushed out beyond the tip of the tweezers, and the cutting blade exerts its cutting function.
When the user applies force to the outer surfaces of the two rod-shaped members, the two rod-shaped members approach each other, and the cutting blade slider is sandwiched between the two rod-shaped members.
When the slider is pushed out toward the tip of the tweezers, the sliding shaft and the anchoring member are engaged with each other so that the cutting blade is maintained in a state of protruding from the tip of the tweezers.

According to the seventh invention, the tweezers with a locking mechanism is further provided with a slidable cutting blade, and a knife function can be used in addition to the tweezers function (Fig. 25).
Under such a configuration, when the user shifts the cutting blade slider 42, the cutting blade 43 is pushed out from the tip of the tweezers, and the cutting function by the cutting blade 43 can be exhibited.
When the knife function is exhibited, the user applies a force to the outer surfaces of the two rod-shaped members 11 and 12, causing the two rod-shaped members 11 and 12 to approach each other, and the cutting blade slider 42 between the two rod-shaped members. is sandwiched (Fig. 26).
From this state, when the slider 212 is further pushed out toward the tip of the tweezers, the sliding shaft 211 and the mooring member 3 are engaged, and the state where the distance between the two rod-shaped members 11 and 12 is narrowed is maintained. , the state where the cutting blade 43 protrudes from the tip of the tweezers 1 is maintained (FIG. 26).
By fixing the relative position of the cutting blade slider 42 with respect to the tweezers 1 in this manner, the cutting blade 43 can be stably operated even when pressure is applied to the cutting blade 43 during the cutting operation.

Furthermore, in the seventh invention, when ending the knife function (Fig. 29), force is applied in a direction to bring both rod-shaped members 11 and 12 of the tweezers 1 closer together in the same manner as in the first invention (Fig. 6).
Then, the engagement state between the sliding shaft 211 and the mooring member 3 is released, and the two rod-like members 11 and 12 move away from each other due to the restoring force (leaf spring action) of the tweezers 1 .
As a result, the cutting blade slider 42 sandwiched between the bar members 11 and 12 is released.
Furthermore, the elastic force exerted by the cutting blade return mechanism 44 pulls the cutting blade slider 42 toward the tweezers joint portion JN, and the cutting blade 43 is automatically housed from the tip of the tweezers without manual intervention.

[Eighth Invention]
Further, in order to solve the above problems, the eighth invention of the present application provides the tweezers with a lock mechanism according to the second to sixth inventions,
A cutting blade slider fixed to the cutting blade, provided slidably along the axial direction of the tweezers rod-shaped member;
further comprising

When the user shifts the cutting blade slider, the cutting blade is pushed out beyond the tip of the tweezers, and the cutting blade exerts its cutting function.
When the user applies force to the outer surfaces of the two rod-shaped members, the two rod-shaped members approach each other, and the cutting blade slider is sandwiched between the two rod-shaped members.
When the slider is pushed toward the tip of the tweezers, after the slider advances along the guide wall of the mooring member, the cutting blade is pushed out from the tip of the tweezers based on the frictional force acting on the slider and the mooring member that are in contact with each other. The configuration was such that the protruding state was maintained.

According to the eighth invention (FIG. 27), by providing the same technical features as the seventh invention (FIG. 26), the same effects as those of the seventh invention can be obtained.

FIG. 4 is an external perspective view of the tweezers with a lock mechanism of the present embodiment when the slider and the sliding shaft are retracted. FIG. 4 is an external perspective view showing constituent elements of the tweezers with a lock mechanism. FIG. 4 is an external perspective view of the tweezers with a lock mechanism when the tips of the tweezers are closed (an object is clamped). FIG. 10 is an external perspective view of the tweezers with a lock mechanism when a state of holding an object is maintained (locked). It is a schematic diagram which shows the locking mechanism of tweezers with a locking mechanism, (a) is the figure before locking, (b) is the figure after locking. FIG. 10 is an external perspective view of the tweezers with a locking mechanism when performing an unlocking operation while holding an object. FIG. 10 is an external perspective view of the tweezers with a locking mechanism having a wedge-shaped slider when the slider is retracted. FIG. 10 is an external perspective view showing constituent elements of tweezers with a locking mechanism having a wedge-shaped slider. FIG. 4 is an external perspective view of tweezers with a lock mechanism having a wedge-shaped slider when the tips of the tweezers are closed (an object is clamped). FIG. 10 is an external perspective view of tweezers with a locking mechanism having a wedge-shaped slider, in which an object is held (locked). FIG. 10 is a top plan view of tweezers with a lock mechanism having a wedge-shaped slider, in which the object is held (locked). FIG. 5 is a schematic diagram showing the forces acting on the slide and the anchor when the wedge-shaped slider and the anchor are engaged; FIG. 10 is an external perspective view of tweezers with a lock mechanism having a wedge-shaped slider when performing an unlocking operation while holding an object. FIG. 10 is an external perspective view of the tweezers with a lock mechanism having a wedge-shaped slider when engagement between the slider and the mooring member is released by an unlocking operation. FIG. 10 is an external perspective view of the slider returning to a predetermined unlocked position after the engagement between the wedge-shaped slider and the mooring member is released; FIG. 11 is an external perspective view showing a modification in which a rubber cord is used to form a slider position return mechanism; It is a schematic diagram which shows the modification of a locking mechanism, (a) is a figure of the slider which has a tooth-shaped protrusion, (b) is a figure which installed the anchoring member in the rod-shaped member of both sides. FIG. 10 is an external perspective view of a configuration in which an axial position fixing mechanism using a screw member is mounted on tweezers with a lock mechanism having a wedge-shaped slider. FIG. 10 is an external perspective view of the tweezers with a lock mechanism having a wedge-shaped slider and having a shaft position fixing mechanism using a screw member when the sliding shaft is fixed while holding an object. FIG. 3 is a schematic diagram showing a shaft position fixing mechanism using a screw member, where (a) is a diagram showing a state in which tightening by the screw member is loosened, and (b) is a diagram showing a state in which the sliding shaft is tightened by the screw member. be. FIG. 11 is an external perspective view of a configuration in which a locking mechanism-equipped tweezers having a wedge-shaped slider is equipped with a shaft position fixing mechanism using a rotating member. FIG. 10 is an external perspective view of the tweezers with a lock mechanism having a wedge-shaped slider and having a shaft position fixing mechanism using a rotating member, in which the sliding shaft is fixed while holding an object. (a) is a schematic diagram of a state in which a sliding shaft is tightened by a shaft position fixing mechanism using a rotating member, and (b) is a schematic diagram of the rotating member. FIG. 5 is a schematic diagram of a state in which the sliding shaft is released from tightening in the shaft position fixing mechanism using the rotating member. FIG. 10 is an external perspective view of the tweezers equipped with a knife function and having a cutting blade slider protruding with the tip of the tweezers opened. FIG. 10 is an external perspective view of the tweezers equipped with a knife function and with a locking mechanism, when maintaining (locking) the state in which the knife function is exhibited. FIG. 10 is an external perspective view of tweezers with a locking mechanism (having a wedge-shaped slider) equipped with a knife function, in which a cutting blade slider is protruded with the tip of the tweezers opened.

Hereinafter, tweezers with a lock mechanism according to the present invention will be described with reference to FIGS. 1 to 27. FIG.
[Embodiment]
The embodiment of the present invention is an example of tweezers 100 with a locking mechanism that can exhibit a locking function without arranging parts for performing a locking operation on the outer surfaces of two rod-shaped members that constitute the tweezers.
This content will be described in detail below.

FIG. 1 is a schematic diagram showing the configuration of a locking mechanism-equipped tweezers 100 according to an embodiment.
As shown in FIG. 1, the tweezers with locking mechanism 100 is composed of the tweezers 1, the guide groove 22, the sliding shaft 211, the slider 212, the slider position return mechanism 23, and the mooring member 3. .

As shown in FIG. 2, the tweezers 1 has a "dogleg" shape physically integrated by joining one ends of two rod-like members 11 and 12 to each other.
The tweezers 1 can clamp an arbitrary object with the tips of the rod-like members 11 and 12 on the opposite side of the joint JN.
Note that the tweezers 1 is not limited to two rod-shaped members 11 and 12 joined at their ends, and the overall shape is formed into a "dogleg" shape by bending one member in the middle. Tweezers may also be used.

The guide groove 22 consists of a hollow structural member.
In the example shown in FIG. 1, the guide groove 22 is a guide pipe made of a hollow tube.
The guide groove 22 is provided along the axial direction on the inner surface of one of the two rod-shaped members 11 and 12 forming the tweezers 1 .
In the example of FIG. 1, the guide groove 22 is fixed to the inner surface of the rod-like member 12. As shown in FIG.
The guide groove 22 is not limited to a pipe having a hollow cylindrical cross section, and may be a rail having a rectangular cross section or a U-shaped cross section.
Also, the material for forming the guide groove 22 may be any metal, synthetic resin, wood, or the like.
As a method of fixing the guide groove 22 to the tweezers 1, any method such as adhesive, soldering, and screwing can be adopted. Furthermore, the tweezers 1 and the guide groove 22 may be integrally molded.

The sliding shaft 211 is made of a rod-like member with a fine core.
The sliding shaft 211 is slidably inserted through the guide groove (guide pipe) 22 .
The constituent material of the sliding shaft 211 may be any metal, synthetic resin, wood, or the like.

The slider 212 is a member fixed to the slide shaft 211 and is operated by the user (extrusion operation toward the tip of the tweezers).
Since the slider 212 is interlocked with the sliding shaft 211 , it slides on the inner surface of the rod-shaped member 12 along the axial direction of the member 12 .
The width of the slider 212 is sufficiently thin so as not to interfere with the clamping function of the tweezers 1 (so that the tips of the tweezers 1 can be brought into close contact with each other).
Moreover, the shape of the slider 212 is not limited to the shape in which the front portion is raised and the rear portion is flat as illustrated in FIG.
The sliding shaft 211 and the slider 212 may be formed as one component by integral molding instead of being configured by physically different individual components.

The slider position return mechanism 23 is an elastic member connected between a predetermined portion of the tweezers 1 and one end of the slide shaft 211, as shown in FIG.
In this example, the joint portion JN of the tweezers 1 is selected as the “predetermined portion” of the tweezers 1 .
That is, in this example, one end of the slider position return mechanism 23 is engaged with the joint portion JN of the tweezers 1 and the other end of the slider position return mechanism 23 is engaged with one end of the slide shaft 211 .

In this embodiment, the slider position return mechanism 23 is composed of a "spring" (Fig. 1).
Spring 23 may be a conventional coil spring having a cylindrical shape.
The spring is widely and commonly available in the market as a general-purpose component, and contributes to reducing the manufacturing cost of the tweezers with locking mechanism 100 .
The spring 23 may be made of any material as long as it generates an elastic force in response to an external force, and any material such as metal, synthetic resin, or the like can be used.

As shown in FIG. 5( a ), the lock mechanism of the tweezers consists of a sliding shaft 211 that slides along the axial direction of the rod-shaped member 12 on the inner surface of the rod-shaped member 12 and a mooring shaft 211 fixed to the inner surface of the rod-shaped member 11 . It consists of a combination of members 3.
The anchoring member 3 can be provided "inside one or both" of the two rod-shaped members 11 and 12. As shown in FIG.
In the configuration example of FIG. 1, the mooring member 3 is attached only to the rod-shaped member 11 on which the guide groove 22 is not provided.
The mooring member 3 is attached to the inner surface of at least one of the rod-shaped members 11 and 12 (in the example of FIG. 1, to the inner surface of the rod-shaped member 11 that is not provided with the guide groove 22). It is a thin core member that is provided so as to stand upright.
Further, as shown in FIG. 1, the mooring member 3 is arranged at a position closer to the tip of the tweezers than the guide groove 22 is.

Next, the operation of the tweezers with locking mechanism 100 having the above configuration will be described.

[Tweezers function]
When the tweezers with lock mechanism 100 are used as "tweezers" for pinching and pinching a work object (FIG. 1), the user does not apply force to the slider 212, and the position of the slider position return mechanism 23 made of an elastic body remains unchanged. The return action brings the slider 212 to the predetermined unlocked position (FIG. 1).
That is, the clamping function of the tweezers 1 is exhibited.
The "unlocked position" refers to a position (FIG. 1) at which the slider 212 stops due to the action of the slider position return mechanism 23 when no external force is applied to the slider 212 .

[When lock is set]
Further, when the user pushes the slider 211 toward the tip of the tweezers 1 (see FIG. 5(a)) while an object (not shown) is sandwiched between the tips of the tweezers 1 (FIG. 3), the slider 211 slides. The driving shaft 211 and the anchoring member 3 are engaged (see FIG. 5(b)), and the state in which the object is held between the tips of the tweezers is maintained (FIG. 4).
This will "activate the locking function".
That is, the locking function can be stably achieved by a very simple operation of moving the sliding shaft 211 to the position of the mooring member 3 so that the mooring member 3 as a locking element exerts a locking action on the sliding shaft 211 . (Fig. 4).

[When unlocking]
Furthermore, when the locking function is released from the state in which the sliding shaft 211 and the mooring member 3 are engaged and the object is held (locked) (FIG. 4), the following operation is performed. .
In the locked state, if the user applies a force in a direction to bring the two rod-like members 11 and 12 closer together (FIG. 6), the engagement between the sliding shaft 211 and the mooring member 3 will occur. status will be resolved.
Then, the two rod-like members 11 and 12 are moved away from each other by the restoring force of the tweezers 1, the tip of the tweezers is opened, and the object held by the tip of the tweezers is released.

Further, when the sliding shaft 211 and the mooring member 3 are disengaged, the slider position return mechanism 23 (spring) exerts an elastic force, and the sliding shaft 211 and the slider 212 are moved to the locked position (slide shaft 211 and From the engagement position of the mooring member 3), it is pulled toward the tweezers joint part JN, and automatically returns to a predetermined unlocked position without manual intervention.
That is, according to the tweezers with a locking mechanism 100, the locking function can be released without the manual operation of the slider 212 (the operation of manually moving the slider 212 to the unlocking position).

As described above, according to the present embodiment, the tweezers 100 are configured such that there are no protrusions (components) on the outer surface of the tweezers.
Therefore, when trying to pick up an object with the tips of the tweezers, the same feeling of use as that of general tweezers without a locking mechanism can be obtained.

[Modification: Wedge-shaped slider]
In the present embodiment, a wedge-shaped slider 25 as shown in FIG. 7 can be employed instead of the thin-line slider 212 (FIG. 1).

FIG. 7 is a schematic diagram showing the configuration of the tweezers with locking mechanism 100A having the wedge-shaped slider 25. As shown in FIG.
As shown in FIG. 7, the tweezers with locking mechanism 100A is composed of the tweezers 1, the guide groove 22, the slider position return mechanism 23, the sliding shaft 24, the slider 25, and the mooring member 3A. .

Among the above, the tweezers 1, the guide groove 22, and the slider position return mechanism 23, which are main components of the tweezers with lock mechanism 100A, are the same as those shown in FIG.

As shown in FIG. 8, the sliding shaft 24 is made of a rod-like member with a fine core, and is slidably inserted into the guide groove 22 .

A slider 25 operated by the user is fixed to the tip of the sliding shaft 24 as shown in FIG.
As shown in FIG. 8, the slider 25 is a small piece member having a wedge shape that has a tip and tapers toward the tip.

The anchoring member 3A is a member provided on the inner surface of one or both of the two rod-shaped members 11 and 12 that constitute the tweezers 1 .
In the example of FIG. 7, the mooring member 3A is provided on the inner surface of the rod-shaped member 11 on which the guide groove 22 is not provided.
The mooring member 3A has a guide wall 31 for guiding the slider 25, as shown in FIG.
The slider 25 and the mooring member 3A that guides the slider 25 along the guide wall 31 constitute a lock mechanism.

The operation of the tweezers with locking mechanism 100A having the above configuration (wedge-shaped slider 25) will be described below.
First, the operation of locking when the tweezers with locking mechanism 100A is in the clamping state will be described.
A user applies force to the outer surfaces of the two rod-shaped members 11 and 12, the rod-shaped members 11 and 12 approach each other, and an object (not shown) is held between the tips of the tweezers. Think (Figure 9).
In this state, when the slider 25 is pushed toward the tip of the tweezers (FIG. 10), the slider 25 advances along the guiding wall 31 of the mooring member 3A, and then the slider 25 and the mooring member 3A in contact with each other move toward each other. Based on the acting frictional force, the state in which the object is held between the tips of the tweezers is maintained (FIGS. 10 and 11).

With reference to FIG. 12, the principle of locking (maintaining) the clamping state of the tweezers by the frictional force R acting on the slider 25 and the mooring member 3A that are in contact with each other will be described.
When the slider 25 is pushed toward the tip of the tweezers, the slider 25 comes into contact with the wall surface (guide wall 31) of the mooring member 3A and is blocked.

After that, when the user loosens the force applied to the outer surfaces of the rod-shaped members 11 and 12 (the force directed from the outside to the inside of the tweezers), the restoring force of the tweezers 1 causes the two rod-shaped members 11 and 12 to move toward each other. As a result, the slider 25 and the mooring member 3A are pressed against each other with a very strong force (normal force N in FIG. 12).
Therefore, according to the law of action and reaction, the normal force N becomes a very large value, and the frictional force R acting on the slider 25 also becomes large.
Further, an elastic force “−kx” corresponding to the displacement x from the return position applied to the slider position return mechanism 23 acts on the slider 25 .
When the axial component of the sliding shaft 24 in the frictional force R acting on the slider 25 is greater than the elastic force "-kx" applied from the slider position return mechanism 23, the slider 25 maintains the state of engagement with the mooring member 3A. Then, the tweezers 1 remain clamped (FIG. 12).

Next, the operation of unlocking the holding state in the tweezers with locking mechanism 100A will be described.
Consider that when the slider 25 and the mooring member 3A are engaged with each other to hold the object, the user applies a force in a direction to bring the two rod-like members 11 and 12 closer together. (Fig. 13).
At this time, the contacting slider 25 and the mooring member 3A are separated (FIG. 14). Then, the frictional force R acting on the slider 25 disappears.
Then, the restraining force acting on the slider 25 in the axial direction of the slider position return mechanism 23 (the component of the frictional force R in the axial direction of the return mechanism 23) also disappears, and the elastic force exerted by the slider position return mechanism 23 causes the slider 25 to return to a predetermined position. to the unlocked position (FIG. 15).
Furthermore, the two rod-like members 11 and 12 of the tweezers 1 move away from each other due to the restoring force of the tweezers 1, and the object held between the tips of the tweezers is released.

7, the lock mechanism (the slider 25 and the mooring member 3A) is all housed inside the tweezers 1 (between the rod members 11 and 12) as in the configuration of FIG. No physical components are located on either side of 12 .
Therefore, when the tweezers 100A with a lock mechanism of FIG. 7 is used to pick up an object with the tip of the tweezers, even if the user puts his or her finger on the outer surface of the rod-shaped members 11 and 12 and applies force, , No parts come into contact with fingers, so you can get the same feeling of use as ordinary tweezers.

Furthermore, under the configuration of FIG. 7, the overall shape of the slider 25 is a wedge shape that tapers toward the point, and the point is engaged with the anchoring member 3A for locking.
In other words, the slider 25 of the tweezers with locking mechanism 100A is a combination of the functions of the slider 212 and the sliding shaft 211 in the tweezers with locking mechanism 100 (see FIG. 5(b)).
Therefore, the configuration of FIG. 7 can achieve the lock function of the tweezers with a simpler structure and a smaller number of parts than the configuration of FIG.
Therefore, the manufacturing cost of the tweezers with locking mechanism 100A can be reduced, and the manufacturing process can be simplified.

[Modification: Slider Position Return Mechanism Using Rubber String]
In this embodiment, instead of the spring 23, a rubber cord 23B can be employed as the slider position return mechanism as shown in FIG.
This rubber cord 23B may be a very common rubber cord that is widely available in the market and inexpensive. This simplifies the configuration of the tweezers with a lock mechanism and also reduces the weight.
In addition, the use of the rubber cord 23B simplifies the manufacturing process and suppresses the manufacturing cost, so that the selling price can be set at a low level, and widespread use can be achieved.
Under the configuration of FIG. 16, even if the rubber cord 23B is damaged, replacement parts are inexpensive, so the cost and time required for repair can be greatly reduced.

[Modification: Shaft Position Fixing Mechanism Using Screw Member]
In the lock mechanism tweezers 100A having the wedge-shaped slider 25 described above, when the object is held between the tips of the tweezers and locked (FIG. 10), the user moves the two rod-like members 11 and 12 closer together. When a force is applied in the direction of (1) the engagement between the slider 25 and the mooring member 3A is released, the restoring force of the tweezers 1 causes the two rod-shaped members 11 and 12 of the tweezers 1 to move away from each other (tips of the tweezers and (2) the elastic force exerted by the slider position return mechanism 23 causes the slide shaft 24 and the slider 25 to return to the predetermined unlocked position.
Such specifications are considered to be very convenient when the user using the tweezers with locking mechanism 100A continues working alone.

However, the work performed using the tweezers 100A with a locking mechanism cannot be necessarily performed by only one person, and there are of course cases where a plurality of people share the same tweezers 100A.
In such a usage scene, it is conceivable that a certain user locks the tweezers 100A while holding an object, and hands the tweezers 100A to another person while holding the object.
In this way, when one person hands over the locked tweezers 100A with an object held between them, if the person on the receiving side applies force when grasping the tweezers 100A. , it may lead to unlocking of the clamped state.
Objects to be clamped using the tweezers 100A may be very small objects, objects that need to be handled carefully, or even valuable items.
Therefore, when the tweezers 100A with a locking mechanism with an object sandwiched therebetween are passed from one person to another person, the locking is not performed even when force is applied to the bar members 11 and 12 from the outside. It is considered more convenient not to come off.

In order to solve such a problem, a shaft position fixing mechanism (screw member 26) may be added to the configuration shown in FIG. 7 (FIG. 18).
This shaft position fixing mechanism (screw member 26) slides by the shaft position fixing mechanism (screw member 26) as shown in FIG. By tightening the driving shaft 24, the sliding shaft 24 can be restrained as shown in FIG. 20(b).
Thereby, as shown in FIG. 19, the position of the sliding shaft 24 remains fixed.

18, a screw insertion hole 221 is provided above the guide groove 22 as shown in FIG. 20(a).
The screw member 26 functioning as a shaft position fixing mechanism is screwed into the screw insertion hole 221 as shown in FIGS. 20(a) and 20(b).
In the example of FIG. 20(a), when the position of the sliding shaft 24 is kept fixed by the shaft position fixing mechanism, the screw member 26 is rotated clockwise so that the screw member 26 moves toward the sliding shaft 24. is fastened to the wall surface inside the guide groove 22.

Here, when the object is held (locked) by the frictional force acting on the slider 25 and the mooring member 3A which are in contact with each other, the shaft position fixing mechanism ( Consider the case where the slide shaft 24 is tightened in the guide groove 22 by a screw member 26) to fix the position of the slide shaft 24 (FIG. 19).
In this case, unlike FIG. 10 described above, even if the user applies force in a direction to bring the two rod-like members 11 and 12 closer together, the engagement state between the slider 25 and the mooring member 3A is maintained. (Fig. 19).

Since the slider 25 is connected to the sliding shaft 24 , the movement of the slider 25 is interlocked with the movement of the sliding shaft 24 .
Therefore, when the slide shaft 24 is tightened by the screw member 26 and the position of the coaxial shaft 24 is fixed, the movement of the slider 25 is also restricted accordingly.
When the user applies a force in a direction to bring the two rod-shaped members 11 and 12 closer together, the engagement between the slider 25 and the mooring member 3A is temporarily released, and the elastic force of the slider position return mechanism 23 is applied to the slider 25. However, the force with which the screw member 26 locks (tightens) the slide shaft 24 is much larger than the elastic force of the return mechanism 23, and as a result, the slider 25 and the locking member 3A are not engaged. This is because the congruent state continues to be maintained.
That is, under the structure provided with the shaft position fixing mechanism (screw member 26) as shown in FIG. can be maintained without being affected by an external force applied in the direction of approaching.

20(b), when the tightening of the screw member 26 to the sliding shaft 24 is relaxed as shown in FIG. Released from restraint (fixed position).
In this state, when force is applied by the user to the tweezers with lock mechanism 100E in FIG. 19 in a direction to bring the two rod-like members 11 and 12 closer together, the slider 25 and the mooring member 3A which have been in contact separate, The frictional force acting on the slider 25 disappears, and the bar-like members 11 and 12 move away from each other due to the restoring force of the tweezers 1, releasing the object held between the tips of the tweezers.
Further, when the frictional force acting on the slider 25 disappears, the elastic force exerted by the slider position return mechanism 23 allows the slider 25 to automatically return to the predetermined unlocked position without human intervention. In this case, the tweezers with locking mechanism 100E returns to the state in which the tips of the tweezers are released as shown in FIG.

When the tweezers with locking mechanism 100A as described above hold the object in place and are locked (FIG. 10), when the tweezers are handed over to another person, even if force is applied to the bar members 11 and 12 from the outside, the lock is locked. The structure (shaft position fixing mechanism) to prevent the disengagement is not limited to the structure using the screw member 26 as shown in FIG. 18, but as shown in FIG. It can also be realized.

In order to realize such a function, the tweezers with locking mechanism 100F of FIG. 21 further includes a rotating member insertion hole 222 and a shaft position fixing mechanism.
The rotating member insertion hole 222 is an elongated belt-like through hole provided in the guide groove 22 as shown in FIG. 23(a).

The shaft position fixing mechanism included in the tweezers with lock mechanism 100F consists of a rotating member 26A and a rotating shaft 27, as shown in FIG. 23(a).
The rotating member 26A is a circular or elliptical member that is inserted into the guide groove 22 via the rotating member insertion hole 222 .
FIG. 23(b) illustrates a perfectly circular rotating member 26A.
As shown in FIG. 23(b), the member 26A is provided with a rotary shaft insertion hole 261 into which the rotary shaft 27 is inserted.
23(a), the rotating shaft 27 is a fine-core member inserted through the rotating member 26A in order to attach the rotating member 26A to the guide groove 22. As shown in FIG.
The rotating member 26A is attached so as to be rotatable about the rotating shaft 27 .

In the tweezers with lock mechanism 100F, as shown in FIG. 23(a), the rotating shaft 27 is inserted at a position shifted from the center of the circle of the rotating member 26A.
By doing so, when the rotating member 26A is rotated, the posture of the rotating member 26A does not remain constant, and the posture of the rotating member 26A (relative position to the guide groove 22) changes. .
Specifically, the portion of the guide groove 22 exposed to the outside is larger in the posture of the rotating member 26A in FIG. 24 than in the posture of the rotating member 26A in FIG. 23(a).

Under the configuration of FIG. 21, when an object is held between the tips of the tweezers as shown in FIG. By holding down the sliding shaft 24 inside, the coaxial 24 is restrained.
As a result, the position of the sliding shaft 24 remains fixed (FIG. 22).

Here, the gripping state of the object is held (locked) by the frictional force acting on the slider 25 and the mooring member 3A which are in contact with each other (FIG. 22). Consider the case where the position of the sliding shaft 24 is fixed as shown in FIG.
In this case, even if a force is applied by the user in a direction to bring the two rod-like members 11 and 12 closer together, the slider 25 is still connected to the sliding shaft 24 whose position is fixed. movement is restricted.
Therefore, even if the elastic force of the slider position return mechanism 23 reaches the slider 25, the slider 25 cannot return to the predetermined unlocked position, and the engagement state between the slider 25 and the mooring member 3A is maintained.
That is, the tweezers with a lock mechanism 100F of FIG. 22 maintains (locks) the state in which the object is clamped between the tips of the tweezers. It is possible to keep it without receiving
Therefore, even when the tweezers 100F locked with an object pinched is delivered to another person, it is possible to avoid unlocking the pinched state, and in addition, the object pinched by the tweezers 100F can be prevented from being unlocked. accidents (dropping, loss, etc.) can be prevented.

Although the tweezers 100E and 100F with a locking mechanism shown in FIGS. 18 and 21 have a shaft position fixing mechanism, whether or not to operate this shaft position fixing mechanism may be appropriately selected according to the usage scene. .
When it is necessary to transfer the tweezers 100E or 100F with a locking mechanism with an object between them from one person to another person, the position fixing function of the shaft position fixing mechanism for the sliding shaft 24 is used. It suffices if the locking in the state in which the object is held is not influenced by the external force acting in the direction of approaching the rod-shaped members 11 and 12. As shown in FIG.
On the other hand, when it is desired to quickly release the lock in which the object is clamped by the tweezers with lock mechanism 100E or 100F by applying a force in the direction to make the rod-shaped members 11 and 12 approach each other, the shaft position fixing mechanism is used to move the sliding shaft. 24 is not fixed (FIG. 20(a) or FIG. 24).
When used in a state in which the shaft position fixing mechanism is not actuated, substantially the same configuration as that shown in FIG. 7 is used.

Further, the mechanism (shaft position fixing mechanism) that applies pressure to the sliding shaft 24 to fix the relative position of the coaxial shaft 24 is provided on the outside of the side surfaces of the two rod-shaped members 11 and 12 that constitute the tweezers with lock mechanism 100F. It is realized without arranging parts.
Therefore, when the tweezers with locking mechanism 100F is used to pick up an object, it is possible to obtain a feeling of use that is the same as that of ordinary tweezers.

[Modification: Combination of lock function and knife function]
The tweezers with locking mechanism of the present application can be configured to coexist with the knife function.
Tweezers with a lock mechanism 100G in FIG. 25 is an example in which a knife function is added to the configuration in FIG.
When the tweezers 100G function as a "knife", the user shifts the cutting blade slider 42 to push the cutting blade 43 out of the tip of the tweezers 2 (FIG. 25).
At this time, the cutting function is exhibited by the cutting blade 43 fixed to the cutting blade slider 42 (FIG. 26).

When the tweezers with locking mechanism 100G functions as a "knife", it is used with the bar members 11 and 12 narrowed as shown in FIG.
A state in which the extruded cutting blade 43 is sandwiched between two adjacent rod-shaped members 11 and 12 as shown in FIG. is achieved by applying a force in a direction that brings the
In this state, when the user further pushes the slider 212 toward the tip of the tweezers and engages the sliding shaft 211 with the anchoring member 3 (FIG. 26), the cutting blade is pulled between the two rod-like members 11 and 12. The state in which the slider 42 is sandwiched is maintained.
As a result, the knife function can be locked, and the cutting blade 43 can be stably operated even when pressure (reaction force from the object to be cut) is applied to the cutting blade 43 during cutting work. becomes.

In order to release the locked state of the knife function (FIG. 26), a force is applied in a direction to bring the two rod-like members 11 and 12 closer together, as in the release operation shown in FIG.
Then, the sliding shaft 211 is disengaged from the mooring member 3 by the restoring force (plate spring action) of the tweezers, the slider 212 is moved by the action of the slider position return mechanism 23, and the cutting blade slider 42 is returned to the cutting blade. The action of mechanism 44 draws both components 212 and 42 together toward tweezers junction JN.

The configuration of the tweezers 100H with a locking mechanism that can lock the knife function is not limited to being based on the configuration in FIG. 1 as described above, but can also be realized based on the configuration in FIG. can.
27 can exhibit the same function (knife function locking) as the configuration shown in FIG. Comfort is ensured when using the knife function, as the applied force is efficiently transmitted to the object to be cut.

Although the present invention has been described with reference to the embodiments, the present invention is not limited to the above embodiments. Various modifications that can be understood by those skilled in the art are possible in the configuration and details of the present invention without departing from the gist of the present invention.

REFERENCE SIGNS LIST 100 tweezers with locking mechanism 1 tweezers 11, 12 rod-shaped member 211 sliding shafts 212, 25 sliders 22, 24 guide grooves 23 slider position return mechanism 26 screw member 26A rotating member 27 rotating shaft 41 shaft rod 42 cutting blade slider 43 cutting Blade 44 Cutting blade return mechanism

Claims (8)

A tweezers with a locking mechanism that can maintain a state of holding an arbitrary object,

Tweezers having a "dogleg" shape physically integrated by joining one end of two rod-shaped members to each other, and capable of pinching any object with the tips of the two rod-shaped members on the opposite side of the joint. When,
a guide groove made of a hollow structural member provided along the axial direction on the inner surface of one of the two rod-shaped members;
a sliding shaft made of a rod-like member with a fine core and slidably inserted through the guide groove;
a slider that is a member fixed to the sliding shaft and is operated by a user;
a slider position return mechanism, which is an elastic member connected between a predetermined portion of the tweezers and one end of the slide shaft and is engaged with the predetermined portion of the tweezers and one end of the slide shaft;
A thin core member provided on the inner surface of one or both of the two rod-shaped members so as to stand against the inner surface, and is arranged at a position closer to the tip of the tweezers than the guide groove. a mooring member that
with

A locking mechanism consisting of a sliding shaft and a mooring member that intersects with the sliding shaft,
(1) When the user applies force to the outer surfaces of the two rod-shaped members, the rod-shaped members approach each other, and an object is held between the tips of the tweezers.
When the slider is pushed toward the tip of the tweezers, the sliding shaft and the anchoring member are engaged to maintain the state in which the object is held between the tips of the tweezers.
(2) When the user applies a force in a direction to bring the two rod-like members closer together while the object is held by the sliding shaft and the mooring member being engaged,
The engagement state between the sliding shaft and the anchoring member is released, and the two rod-like members of the tweezers move away from each other due to the restoring force of the tweezers, releasing the object held between the tips of the tweezers.
A tweezers with a lock mechanism, wherein the sliding shaft and the slider are returned to a predetermined unlocked position by an elastic force exerted by a slider position return mechanism.
A tweezers with a locking mechanism that can maintain a state of holding an arbitrary object,

Tweezers having a "dogleg" shape physically integrated by joining one end of two rod-shaped members to each other, and capable of pinching any object with the tips of the two rod-shaped members on the opposite side of the joint. When,
a guide groove made of a hollow structural member provided along the axial direction on the inner surface of one of the two rod-shaped members;
a sliding shaft made of a rod-like member with a fine core and slidably inserted through the guide groove;
a slider, which is a wedge-shaped small piece member fixed to the tip of the sliding shaft and having a tip that tapers toward the tip, and is operated by a user;
a slider position return mechanism, which is an elastic member connected between a predetermined portion of the tweezers and one end of the slide shaft and is engaged with the predetermined portion of the tweezers and one end of the slide shaft;
a mooring member provided on the inner surface of one or both of the two rod-shaped members and having a guide wall for guiding the slider;
with

A lock mechanism consisting of a slider and a mooring member that guides the slider along the guide wall,
(1) When the user applies force to the outer surfaces of the two rod-shaped members, the rod-shaped members approach each other, and an object is held between the tips of the tweezers.
When the slider is pushed toward the tip of the tweezers, the slider advances along the guiding wall of the mooring member, and then the object is pushed to the tip of the tweezers based on the frictional force acting on the slider and the mooring member that are in contact with each other. The sandwiched state is maintained,
(2) When the slider and the mooring member are engaged to hold the object, and the user applies a force in a direction to bring the two rod-like members closer together,
When the slider and the mooring member that were in contact with each other separated, the frictional force acting on the slider disappeared, and the restoring force of the tweezers caused the two rod-shaped members of the tweezers to move away from each other, and were held between the tips of the tweezers. As the object is released,
A tweezers with a lock mechanism, characterized in that the slider is returned to a predetermined unlocked position by an elastic force exerted by a slider position return mechanism.
In the tweezers with a lock mechanism according to claim 1 or 2,
Tweezers with a lock mechanism, wherein the slider position return mechanism is a spring.
In the tweezers with a lock mechanism according to claim 1 or 2,
Tweezers with a lock mechanism, wherein the slider position return mechanism is a rubber cord.
In the tweezers with a lock mechanism according to claim 2 ,
a screw insertion hole provided in the guide groove;
a shaft position fixing mechanism comprising a screw member screwed into the screw insertion hole;
further comprising

(1) When the object is held between the tips of the tweezers due to the frictional force acting on the slider and the mooring member that are in contact with each other,
Furthermore, when the sliding shaft in the guide groove is tightened by the screw member forming the shaft position fixing mechanism, the position of the sliding shaft is fixed,
The engagement state between the slider and the mooring member is maintained even when a force is applied by the user in a direction to bring the two rod-shaped members closer together,
(2) After the tightening of the sliding shaft by the shaft position fixing mechanism is relaxed and the position of the sliding shaft is released, a force is applied by the user in a direction to bring the two rod-shaped members closer together. When,
The slider and the mooring member that were in contact with each other separate, the frictional force acting on the slider disappears, and the restoring force of the tweezers causes the two rod-like members of the tweezers to move away from each other, and are held between the tips of the tweezers. As the object is released,
A tweezers with a lock mechanism, characterized in that the slider is returned to a predetermined unlocked position by an elastic force exerted by a slider position return mechanism.
In the tweezers with a lock mechanism according to claim 2 ,
a turning member insertion hole provided in the guide groove;
Axial position consisting of a circular or elliptical rotating member inserted into the guide groove through the rotating member insertion hole, and a rotating shaft inserted through the rotating member to attach the rotating member to the guide groove. a fixing mechanism;
further comprising

(1) When the object is held between the tips of the tweezers due to the frictional force acting on the slider and the mooring member that are in contact with each other,
Furthermore, when the sliding shaft in the guide groove is pressed down by pressure from the rotating member forming the shaft position fixing mechanism, the position of the sliding shaft is fixed,
The engagement state between the slider and the mooring member is maintained even when a force is applied by the user in a direction to bring the two rod-shaped members closer together,
(2) After the pressure from the rotating member to the sliding shaft is weakened and the fixed position of the sliding shaft is released, when the user applies a force in a direction to further bring the two rod-shaped members closer together,
The slider and the mooring member that were in contact with each other separate, the frictional force acting on the slider disappears, and the restoring force of the tweezers causes the two rod-like members of the tweezers to move away from each other, and are held between the tips of the tweezers. As the object is released,
A tweezers with a lock mechanism, characterized in that the slider is returned to a predetermined unlocked position by an elastic force exerted by a slider position return mechanism.
In the tweezers with a lock mechanism according to claim 1 ,
A cutting blade slider fixed to the cutting blade, provided slidably along the axial direction of the tweezers rod-shaped member;
further comprising

When the user shifts the cutting blade slider, the cutting blade is pushed out beyond the tip of the tweezers, and the cutting blade exerts its cutting function.
When the user applies force to the outer surfaces of the two rod-shaped members, the two rod-shaped members approach each other, and the cutting blade slider is sandwiched between the two rod-shaped members.
A lock mechanism characterized in that, when the slider is pushed out toward the tip of the tweezers, the sliding shaft and the anchoring member are engaged to keep the cutting blade projecting from the tip of the tweezers. with tweezers.
In the tweezers with a lock mechanism according to claim 2 ,

A cutting blade slider fixed to the cutting blade, provided slidably along the axial direction of the tweezers rod-shaped member;
further comprising

When the user shifts the cutting blade slider, the cutting blade is pushed out beyond the tip of the tweezers, and the cutting blade exerts its cutting function.
When the user applies force to the outer surfaces of the two rod-shaped members, the two rod-shaped members approach each other, and the cutting blade slider is sandwiched between the two rod-shaped members.
When the slider is pushed toward the tip of the tweezers, after the slider advances along the guide wall of the mooring member, the cutting blade is pushed out from the tip of the tweezers based on the frictional force acting on the slider and the mooring member that are in contact with each other. Tweezers with a locking mechanism, characterized in that they are constructed so as to maintain a protruded state.

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