JP6841529B1 - tweezers - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide tweezers capable of pinching a soft object or an object whose shape is not constant by separating without damaging it. SOLUTION: The tweezers 1c including a pair of sandwiching portions 2c and 3c for sandwiching an object and a handle 10c for connecting the pair of the sandwiching portions, and at least one of the sandwiching portions is a first sandwiching portion. It is made of a wire rod having a loop portion, and when the handle is pushed, the acting portions 8c and 15c, which are portions that sandwich the object of the pair of the sandwiching portions, come into contact with each other and bend. [Selection diagram] Fig. 1

Description

The present invention relates to tweezers.

The tweezers are used for the purpose of sandwiching an object, and have a pair of sandwiching portions that sandwich the object and a handle that is connected to the pair of sandwiching portions and is operated by the user.

Japanese Unexamined Patent Publication No. 2004-42147

Since the conventional tweezers have a fixed shape in which the sandwiching portion is hard, it is difficult to pinch the soft object without damaging it. In addition, it is difficult to separate and pick up objects whose shape is not constant. It is difficult for an object with a separated shape to permeate the pinching force, and conversely, if it is strongly pinched with conventional tweezers, a part of the object may be damaged.

Therefore, an object of the present invention is to provide tweezers capable of pinching an object without damaging it in view of the above-mentioned problems of the prior art.

In order to solve at least one of the above-mentioned problems, the tweezers according to the present invention are tweezers including a pair of scissors for sandwiching an object and a handle for connecting to the pair of scissors, and at least one of the tweezers. The first sandwiching portion, which is the sandwiching portion, is made of a wire rod having a loop portion.

Further, when the handle is pushed, the acting portion, which is a portion of the pair of sandwiching portions that sandwiches the object, may come into contact with each other and bend.

Further, the first sandwiching portion may be composed of a plurality of the wires, and there may be a gap between the plurality of wires in the acting portion which is a portion of the first sandwiching portion that sandwiches the object.

Further, in the acting portion, there is a gap between the plurality of the wire rods in the sandwiching direction in which the object is sandwiched, and the acting portion is most located in the acting portion which is a portion of the other sandwiching portion that sandwiches the object. Even if the proximal most recent wire is configured to contact the other working part, followed by the second proximal wire that is second proximal to the other working part, it comes into contact with the other working part. Good.

Further, the pair of the sandwiching portions may be configured to be concave with respect to each other.

Further, the pair of sandwiches may be configured such that one is convex with respect to the other and the other is concave with respect to the other.

Further, the pair of the sandwiching portions may be configured to be convex with respect to each other.

Further, the first sandwiching portion may include a twist preventing portion for preventing twisting of the wire rod.

Further, the handle may include a pair of push portions which are connected to the pair of sandwiching portions and pushed by the user, and a hinge portion which is connected to the pair of the push portions.

Further, the hinge portion may be composed of a plurality of wire rods.

Further, the sandwiching portion and the hinge portion may be made of a common wire rod.

Further, the entire tweezers may be made of a wire rod.

Further, the acting portion, which is a portion of the other sandwiching portion that sandwiches the object, may enter the inside of the acting portion, which is the portion of the other sandwiching portion that sandwiches the object.

In addition, the working portion that sandwiches the object of the other sandwiching portion may enter the inside of the acting portion that sandwiches the object of the sandwiching portion and enter an occlusal state.

Further, when the handle is opened, the acting portion, which is a portion of the pair of sandwiching portions that sandwiches the object, may be separated.

Further, when one end of the handle is pushed, the working portion which is a portion of the pair of sandwiching portions sandwiching the object approaches, and when the other end is pushed, the working portion may be separated.

According to the present invention, it is possible to provide tweezers that can pinch an object without damaging it.

It is a figure which shows the tweezers by one Embodiment of this invention, (a) the perspective view which shows the initial state of the action part, (b) the perspective view which shows the contact state of the action part, (c) is the modification of (a). is there. It is a figure which shows the tweezers by one Embodiment of this invention, (a) the perspective view, (b) the figure which shows the operation of sandwiching a spherical object, (c) is the figure which shows the operation of sandwiching an elongated object. It is a figure which shows the tweezers by one Embodiment of this invention, is (a) front view, (b) AA line sectional view, (c) BB line sectional view. It is a perspective view which shows the tweezers by one Embodiment of this invention. It is a perspective view which shows the tweezers by one Embodiment of this invention. It is a perspective view which shows the tweezers by one Embodiment of this invention. It is a perspective view which shows the tweezers by one Embodiment of this invention. It is a perspective view which shows the tweezers by one Embodiment of this invention. It is (a) an exploded perspective view and (b) an assembly perspective view of the tweezers according to one Embodiment of this invention. It is (a) perspective view of the sandwiching member and (b) the whole assembly perspective view of the tweezers according to one Embodiment of this invention. It is (a) perspective view of the sandwiching member and (b) the whole assembly perspective view of the tweezers according to one Embodiment of this invention. It is an exploded perspective view of the tweezers according to one Embodiment of this invention, (a) the perspective view of the handle part, (b) the perspective view of the sandwiching member and the elastic hinge part. It is explanatory drawing which showed the tweezers and the use state by one Embodiment of this invention, (a) the figure which shows the operation in the approaching direction of an action part, (b) is the figure which shows the operation in the opening direction of an action part. It is (a) perspective view of one sandwiching member, (b) perspective view of the other sandwiching member, and (c) the whole assembly perspective view of the tweezers according to one Embodiment of this invention. FIG. 3 is a perspective view schematically showing a usage state of tweezers according to the embodiment of FIG. It is (a) plan view and (b) side view of the tweezers by one Embodiment of this invention. It is (a) plan view, (b) side view, (c) plan view which showed the use state, (d) plan view which showed the use state of the tweezers by one Embodiment of this invention.

An example of the embodiment will be described below with reference to the drawings. The tweezers according to the present application include a pair of pinching portions that sandwich the object and a handle that connects to the pair of pinching portions. At least one of the pair of sandwiching portions is composed of a wire rod having a loop portion. In the following, the direction in which the object is sandwiched is defined as the sandwiching direction, and the direction in which the sandwiching portion is arranged in the front and the handle is arranged in the rear is described as the front-rear direction. Although not particularly limited, preferably, the tweezers of the present application are long in the front-rear direction.

1A and 1B are views showing tweezers according to an embodiment of the present invention, FIG. 1A is a perspective view showing an initial state of the working part, and FIG. 1B is a perspective view showing a contact state of the working part. 1 (c) is a modification of FIG. 1 (a).

As shown, the tweezers 1c includes a pair of pinching portions 2c and 3c, and a handle 10c connected to the pinching portions 2c and 3c. The handle 10c includes a pair of push portions 5c and 6c and a hinge portion 4c. Here, both of the pair of sandwiching portions 2c and 3c are composed of wire rods having loop portions.

The sandwiching portions 2c and 3c are made of elastic wire rods. Both sandwiched portions are substantially symmetrical, and the sandwiched portion 2c will be described below as an example. The wire rod constituting the sandwiching portion 2c has a shape starting from one end, folding back in a widely curved loop at the center, and returning to a position where the other end is aligned with one end. In other words, the wire rod constituting the sandwiching portion 2c is a loop portion having a substantially loop shape at the center and a straight portion having a substantially linear shape at both ends. In the sandwiching portion 2c, the acting portion 8c, which is a portion sandwiching the object, is composed of this loop portion, and the extending portion 9c, which is a portion extending toward the handle 10c, is composed of both end portions.

The working portion 8c may be configured so that the entire working portion 8c is on substantially the same surface, or as shown in the drawing, the acting portion 8c may be bent so that the front portion and the rear portion are on different surfaces. As shown in the figure, the working portion 8c has a shape in which the front portion is bent toward the other working portion. Further, the working portion 8c may be configured to be on substantially the same surface as the extending portion 9c, may be configured to be on a different surface, or only a part thereof may be on a different surface. It may be configured in.

When the working portion 8c pushes the handle 10c (pushing so that both pushing portions approach each other), the working portion 8c comes into contact with the other working portion 15c and bends. The whole working part 8c may come into contact with the other working part 15c, but as shown in the figure, only a part of the working part 8c may come into contact with the other working part 15c.

Here, the loop portion of the acting portion 8c has a shape of migrating to the stretched portion 9c without closing the end, and has a loop shape in which a part is missing. The loop portion may be a substantially circular shape, an elliptical shape, or a polygonal shape such as a substantially triangular shape or a square shape. It can be shaped appropriately according to the object, and the figure shows an example of a shape in which the front is substantially triangular and the rear is narrowed.

The elastic wire is preferably a metal wire having a round cross section, for example, a wire such as stainless steel or a piano wire. However, the wire rod is not limited to this, and a wire rod or a plate material having a polygonal cross section such as a quadrangle or a hexagon may be used.
For example, FIG. 1C shows an example in which one of the sandwiching portions 2c is composed of a plate-shaped piece. Therefore, in this example, the acting portion 8c of the sandwiching portion 2c is formed in a plate shape. Preferably, the working portion 8c has the same contour shape as the other working portion 15c.
Further, the surface may be coated with nylon, silicon, Teflon, or plated. Furthermore, it may be formed of a material such as nylon or plastic resin.
Further, at that time, the thickness may be thickened at the root portion and gradually reduced toward the tip portion.
Although the term "wire" or "wire" is used in the following description, it does not mean that the wire is limited to a wire, and any known suitable elastic wire may be used.

The thickness of the wire is, for example, 0.3 to 5.0 mm, preferably 0.4 to 4.0 mm, and more preferably 0.4 to 3.2 mm.

Further, the wire rod is an example of a wire rod having a uniform thickness in the drawing, but the present invention is not limited to this, and may have a partially different thickness. Further, a part or all of the loop portion may have a flat cross section so that a thin object can be easily sandwiched.

The handle 10c includes a pair of push portions 5c and 6c and a hinge portion 4c connected to the pair of sandwiching portions 2c and 3c. The hinge portion 4c is not particularly limited, but for example, as shown in the drawing, the hinge portion 4c has a substantially Y-shape, and both end portions are elastically deformed.

Both ends of the hinge portion 4c are connected to the push portions 5c and 6c. When the pair of pushing portions are pushed close to each other by the hinge portion 4c, the pair of sandwiching portions 2c and 3c, more specifically, the pair of acting portions 8c and 15c come into close contact with each other. The working parts come into contact with each other before the pushing parts come into contact with each other. When the pair of pushing portions are no longer pressed (separated), the acting portions 8c and 15c are separated from each other.

In order to facilitate this pushing operation, the pushing portions 5c and 6c may be provided with a finger resting surface which is a concave surface or a convex surface, or may be provided with an uneven surface to prevent slipping. For example, as shown in the drawing, a concave surface having a substantially elliptical shape in front view may be provided, and the concave surface may be further provided with a linear concave pattern or a convex pattern. Further, the push portions 5c and 6c are not particularly limited, but are preferably formed to be thicker than both end portions of the hinge portion 4c.

As shown in the figure, the handle 10c may have a pair of push portions and hinge portions integrally formed, or may be separately formed and assembled as in the example described later.

The handle 10c is formed, for example, by molding with a plastic resin. The pair of sandwiches may be connected to this by insert molding when molding the handle, or may be connected to this by insert molding via a member such as a spacer. Further, in the case of a hygienic instrument such as surgical tweezers, the handle may be made of stainless steel and the sandwiched portion may be connected (fixed) to the sandwich by welding, for example, brazing or welding.

In the tweezers 1c, by pushing or releasing the pushing portions 5c and 6c, the acting portion 8c of the sandwiching portion 2c and the acting portion 15c of the sandwiching portion 3c approach or separate, and the object is sandwiched or separated. be able to. At this time, since the sandwiching portions 2c and 3c are made of elastic wire rods, even if the pushing portion is pushed excessively, the force applied to the acting portion does not become excessive, and it is possible to prevent the object from being crushed.

Tweezers 1c are tweezers that pinch earwax, tweezers that pinch nose (feces), tweezers that pinch objects (for example, mustard, pickles, etc.), tweezers that treat acne, surgical tweezers, insect tweezers, insects. It can be applied as a pair of tweezers. In addition, it may be applied as tweezers for pinching mites and dust attached to animals.

Since tweezers are used for grasping fragile objects, it is preferable that the tweezers have no burrs on the surface and are smooth. With conventional tweezers, troublesome steps such as filing are required to finish the surface smoothly. In the case of the tweezers of the present embodiment, by using a wire rod having a round cross section, the surface of the working portion becomes smooth, so that a step such as sanding is not required.

2A and 2B are views showing tweezers according to another embodiment, FIG. 2A is a perspective view, FIG. 2B is a diagram showing an operation of sandwiching a spherical object, and FIG. 2C is a thin object. It is a figure which shows the operation which sandwiches. Hereinafter, the points different from the tweezers of FIG. 1 will be mainly described.

As shown in the figure, here, the sandwiching portions 2c and 3c are composed of a plurality of wire rods. In the illustrated example, each of the wires is composed of three wires, but the present invention is not limited to this, and it may be composed of a plurality of wires such as four wires as described later. Preferably, it is composed of 2 to 8 wires. Further, the pair of sandwiching portions 2c and 3c may be composed of the same number of wires as shown in the figure, or may be composed of different numbers of wires. Both sandwiches may have the same shape or may have different shapes.

The illustration shows an example in which a pair of sandwiched portions are formed symmetrically, and the sandwiched portions 2c will be described below as an example. The sandwiching portion 2c is composed of three elastic wires. Each of the three wires has the above-mentioned loop portion and straight portion, and is arranged at a predetermined interval. The working portion 8c is configured to include a loop portion of three wire rods, and the stretched portion 9c is configured to include a straight portion of three wire rods.
Further, the length of the stretched portion 9c can be appropriately increased to reduce the pressing of the acting portion.
Although not shown here, the pressing force can be changed by adopting a structure in which the stretched portion 9c can be taken in and out from the handle.

Specifically, in the sandwiching portion, the three wire rods are arranged so that the loop portion forms a layer in the sandwiching direction. In the following, the wire most proximal to the other pinch is referred to as the most proximal wire, the second proximal wire is referred to as the second proximal wire, and the most distal wire to the other pinch is the most distal. It is called a wire rod.

As for the acting portion 8c, here, the loop portion 81c of the recently positioned wire rod is the largest, the loop portion 82c of the second proximal wire rod is smaller than this, and the loop portion 83c of the most distal wire rod is the smallest. These wires are arranged so as to form a layer in the sandwiching direction and concentrically in the direction orthogonal to the sandwiching direction. The working portion 8c has a gap in the sandwiching direction between the plurality of wires. That is, there is a distance larger than 0 mm between the opposing portions of the wires. This gap is preferably greater than or equal to the thickness of the wire (thickness in the vertical direction, diameter in the case of a circular cross section).

Similarly, in the acting portion 15c, the loop portion 151c of the recently positioned wire rod is the largest, the loop portion 152c of the second proximal wire rod is smaller than this, and the loop portion 153c of the most distal wire rod is the smallest. These wires are arranged so as to form a layer in the sandwiching direction and concentrically in the direction orthogonal to the sandwiching direction. The working portion 15c has a gap in the sandwiching direction between the plurality of wires. That is, there is a distance larger than 0 mm between the opposing portions of the wires. This gap is preferably greater than or equal to the thickness of the wire (thickness in the vertical direction, diameter in the case of a circular cross section).

With this structure, the working portions 8c and 15c have an internal space that is recessed in the sandwiching direction in the initial state and gradually narrows in width as the depth of the recess becomes deeper. Here, the acting portions 8c and 15c are concave with respect to each other.

The spacing between the wires shown in the drawing in the sandwiching direction is substantially uniform, but is not limited to this. It may be different in some parts, gradually increasing, gradually decreasing, and the like.

In the stretched portion 9c, the straight portion of the wire rod whose loop portion is located on the outermost side (outer edge side) is arranged on the outermost side, and the straight portion of the wire rod whose loop portion is located on the innermost side is arranged on the innermost side. Here, as shown in the figure, the straight line portion following the loop portion 81c is arranged on the outermost side, the straight line portion following the loop portion 82c is arranged next, and the straight line portion following the loop portion 83c is arranged on the innermost side. The straight portions may be at substantially the same position or at different positions in the sandwiching direction.

Each wire rod constituting the sandwiching portion may be made of a wire rod that is easily bent toward the outside. As a result, it is possible to make it difficult to break the part around the object by firmly holding it on the inside and making it easy to bend the outside. Alternatively, it may be made of a wire rod that bends more easily toward the inside. This is because the wire rod located inside tends to have a high rigidity because the length is short. Therefore, by forming the wire rod with a wire rod that easily bends toward the inside, it is possible to obtain an action portion in which the central portion is concave and easily bends. It becomes possible to grip an object having a wide central portion so as to wrap it softly, which makes it easy to bend.

As shown in FIG. 2B, when the object O is a mass such as a spherical body, the acting portion can be sandwiched and picked up so as to wrap the object O without damaging the outer shape. For example, it is suitable for picking up tumors, organs, etc. that have been excised during surgery.

The size and shape of the internal space of the working part can be set according to the object, and the size and shape of the loop portion of each wire rod and the distance (gap) between the wire rods can be set accordingly.

As shown in FIG. 2C, when the object O has an elongated shape (string shape, tubular shape, noodle shape, etc.), it can be reliably pinched by sandwiching it widely between the recently positioned wire rods. Moreover, even if other parts are accidentally pinched or touched, they will not be damaged. For example, it is suitable for picking up blood vessels, nerves, and exfoliated pieces during surgery.
Also, for example, when avoiding nerves and blood vessels, it is not easily damaged even if it is picked, and it can be picked reliably and quickly.
Furthermore, when picking the exfoliated piece while avoiding nerves, blood vessels and other organs, avoiding it on the convex side makes it difficult to damage nerves, blood vessels and other organs.

3A and 3B are views showing tweezers according to another embodiment, FIG. 3A is a front view, FIG. 3B is a sectional view taken along line AA of FIG. 3A, and FIG. 3C is FIG. It is sectional drawing of BB line of (a). Here, an example in which the sandwiching portion is composed of four wire rods will be illustrated and described in more detail.

The tweezers 1c can increase or decrease the number of loop portions that come into contact with the object by adjusting the distance between the pair of push portions. When the number of loop portions that come into contact with the object increases or decreases, the contact area with the object increases or decreases, and the force applied to the object also increases or decreases, so that the object can be sandwiched by the contact area and force suitable for the object. Even a soft object can be pinched without damaging the outer shape and without damaging it.

The acting portion 8c of the tweezers 1c is configured to include loop portions 81c, 82c, 83c, 84c, and the acting portion 15c is configured to include loop portions 151c, 152c, 153c, 154c.

In the tweezers 1c, when a force is applied to the pushing portions 5c and 6c (for example, the user pushes with a finger), the pushing portions 5c and 6c approach each other, whereby the acting portions 8c and 15c approach each other, and then the acting portions 8c and 15c approach each other. The loop portions 81c and 151c of the tweezers are in contact with each other. When the force applied to the pushing portions 5c and 6c becomes larger, the loop portions 82c and 152c of the second proximal wire rod come into contact with each other. In other words, the working part of the tweezers 1c is configured such that the recently positioned wire is in contact with the other working part, and then the second proximal wire is in contact with the other working part.

As shown in FIG. 3A, when the object O is sandwiched between the tweezers 1c, a part of the loop portions 81c and 151c of the recently positioned wire rod intersects with the object O and presses the object O. Further, a part of the loop portions 82c and 152c of the second proximal wire rod also intersects with the object O and presses the loop portion 82c and 152c. In the following, the portion of the loop portion of each wire rod that presses this object will be referred to as a “pressing portion”.

As shown in FIG. 3B, the holding portions 300 of the loop portions 81c and 151c of the recently positioned wire rod sandwich the object O on both sides (upper and lower), and the holding portions of the loop portions 82c and 152c of the second proximal wire rod. The parts 300 sandwich the object O on both sides. The loop portions 81c and 151c of the most recently positioned wire rod form an outer loop, and the loop portions of the second proximal wire rod form an inner loop. , Hold it on both sides (upper and lower). As a result, the tweezers 1c can reliably pinch and hold the object.

As shown in FIG. 3C, in the tweezers 1c, the cross section of the pressing portion 300 is circular, and the peripheral surface of the object O is pressed by an arc surface, so that the object is less likely to be damaged. Further, in the object O, the portion pressed by the pressing portion 300 has a recessed portion O1 formed in the center and a stepped portion O2 formed on both sides, so that the portion pressed by the pressing portion 300 is sandwiched between both sides (upper and lower) by using the pressing portion 300. , It is hard to slip off. In addition, here, for convenience of explanation, only a pair of wire rods out of two pairs of wire rods is illustrated.

As described above, as compared with the conventional tweezers, the tweezers 1c can hold down the cross section of the object with a uniform force in the circular cross section of the wire rod, and can gently grip the object without damaging it. In addition, a plurality of parts of the object can be sandwiched on both sides, and the object can be reliably sandwiched.

Further, since the tip of the working portion of the tweezers 1c is curved, it is not easily damaged even if it comes into contact with other portions.

In the above, the tweezers 1c is switched from a state in which none of the loop portions are in contact with each other to a state in which the loop portions of the recently positioned wire rods are in contact with each other, and further, a state in which the loop portions of the second proximal wire rod are in contact with each other. Although it has been described that the switching is performed, the loop portions of the third proximal wire may be configured to be in contact with each other. That is, among the loop portions of the plurality of wire rods in the pair of sandwiching portions, the loop portions of the most distal wire rods other than the loop portions may be configured to sequentially contact each other.

As an example, the tweezers 1c may have a substantially Z shape in which the loop portion of the recently positioned wire rod bends from the straight portion toward the other sandwiching portion and then bends toward the opposite side. By forming the recently positioned wire rod in a substantially Z shape in front view, the loop portion is easily bent and the flexibility is increased. In other words, it tends to bend in the direction of escaping from the object so as not to act excessively on the object.

The loop portion of the second proximal wire may be slightly bent from the straight portion or may extend linearly without bending. Therefore, a predetermined distance is formed between the loop portion of the nearest wire rod and the loop portion of the second proximal wire rod. By forming the second proximal wire in this way, if the object cannot be pinched by the latest wire alone, the loop part of the nearest wire bends in the direction of the second proximal wire, and the distance is shortened. Can jointly act on the object.

The loop portion of the most distal wire may form a substantially Z shape that bends from the straight portion in the direction opposite to the direction of the other sandwiching portion and then bends in the direction of the other sandwiching portion. Therefore, a predetermined distance is formed between the loop portion of the third proximal wire and the loop portion of the most distal wire. In addition, the most distal wire can support the object as a bottom part in the internal space.

As shown in the figure, the tweezers 1c may have the push portions 5c and 6c of the handle 10c and the hinge portions 4c formed separately. The hinge portion 4c has, for example, a substantially U-shape, and both ends of the U-shape are elastically deformed. The push portions 5c and 6c are connected to both ends of the hinge portion 4c, respectively.

FIG. 4 is a perspective view showing tweezers according to another embodiment. The tweezers shown in each show have different sandwiches from the above.

The pair of tweezers shown in the figure is configured such that one sandwich 2c is convex with respect to the other sandwich 15c, whereas the other sandwich 15c is the other. It is configured to be concave with respect to one of the sandwiched portions 2c.

The sandwiched portion 15c is the same as described above, and here, the sandwiched portion 2c will be described. In the sandwiched portion 2c, the loop portion 81c of the most recently positioned wire rod is the smallest, and the loop portion 83c of the most distal wire rod is the largest. Therefore, when the pushing portion is pushed, one sandwiching portion 2c becomes concave with respect to the other sandwiching portion 15c, enters the inside of the other sandwiching portion 2c, and can enter the inner space thereof.

In such tweezers 1c, one working part enters the inner space of the other working part, narrows the inner space of the other working part from above, and a reduced space having a predetermined width having a substantially arcuate cross section between the two. Is formed. Therefore, it is suitable for sandwiching a thin sheet-shaped object.
For example, in surgery, when a peeling piece is picked and pulled, and peeled (pulled out, pulled and cut with scissors or the like), it can be reliably picked and pulled.

FIG. 5 is a perspective view showing tweezers according to another embodiment. The tweezers shown in each show have different sandwiches from the above.

The pair of sandwiched portions of the illustrated tweezers are configured such that one sandwiched portion 2c and the other sandwiched portion 15c are convex with respect to each other. In both cases, the loop portion of the most recent wire rod is the smallest, and the loop portion of the most distal wire rod is the largest. Therefore, when the push portion is pushed, the loop portions 81c and 151c of the latest wire rod having the smallest loop portion come into contact with each other, and when further contracted, the loop portions 82c and 152c of the second smallest proximal wire rod come into contact with each other. ..

Such tweezers 1c are suitable for thin sheet-shaped objects. In addition, it has a core in the center and is suitable for objects whose surroundings are soft and easily damaged. This is because the central core part can be firmly pinched and the surrounding parts can be softly touched to pinch the object without damaging it.

FIG. 6 is a perspective view showing tweezers according to another embodiment. The tweezers shown in each show have different sandwiches from the above.

The pair of tweezers in the figure are different from the example shown in FIG. 5 only in the loop portion of the latest wire rod. More specifically, in the above-mentioned sandwiched portion, although the loop portion of each wire rod has a different size, the shape is the same or similar, whereas in this example, the loop portion of the recently positioned wire rod is different from the others. , The thinnest and longest shape.

Such tweezers 1c can be reliably sandwiched by sandwiching the loop portions of the recently positioned wire rods with each other and further pressing the tweezers 1c with another wire rod.

FIG. 7 is a perspective view showing tweezers according to another embodiment. In the illustrated tweezers, the pair of sandwiches is similar to the example shown in FIG. 1, and the handle is different from that shown in FIG. Here, the handle 10c is formed in a substantially X shape, and is rotatable in a state where the handle portions 5c and 6c intersect with each other.

More specifically, the handle portions 5c and 6c are each composed of an elongated member, and through holes are provided in a portion between both ends of the elongated member. The hinge portion 4c includes these through holes and a hinge shaft inserted into these through holes. By the hinge portion 4c, both handle portions 5c and 6c are rotatably connected in a state of intersecting each other, and when both handle portions 5c and 6c are closed (pushed), both action portions 8c and 15c approach and come into contact with each other. When both handle portions 5c and 6c are opened, both action portions 8c and 15c are separated.

Such tweezers can open both working parts more widely and are suitable for releasing the sandwiched object. It is also suitable for sandwiching a thick object.

The handle 10c may be provided with an opening spring such as a coil spring or a leaf spring, and the elastic force thereof may be used to open the handle.

FIG. 8 is a perspective view showing tweezers according to another embodiment. In the illustrated tweezers, the pair of pinching portions is the same as the example shown in FIG. 2, and the handle is different from that shown in FIG.

The illustrated handle 10c has a substantially X-shape like the handle shown in FIG. 7. Here, further, the through hole 41c in one handle portion 5c is formed in a plane line of sight, the top portion 42c which is one end of the hinge shaft 42c is formed in a plane line of sight, and the top portion 42c has a linear shape in the through hole 41c. Locked in a crossed state. Further, when the top portion 42c of the hinge shaft and the through hole 41 are at positions where the linear shapes match, one handle portion 5c and the sandwiching portion 2c connected to the handle portion 5c become the other handle portion 6c and the sandwiching portion 3c connected to the other handle portion 6c. Can be removed from.

Further, such tweezers are suitable when the tweezers are frequently washed or disinfected because one of the sandwiching portions 2c and the handle portion 5c can be easily removed from the other sandwiching portion 15c and the handle portion 6c.

As shown in the figure, the handle 10c may be provided with a hole for inserting a finger in one or both of the handle portions 5c and 6c so that fine work can be easily performed.

FIG. 9 is (a) an exploded perspective view and (b) an assembled perspective view of tweezers according to another embodiment. The illustrated tweezers 1 have a pair of sandwiching members (sandwiching portions) 2 and 3, a hinge portion 4, and a pair of handle portions 5 and 6. The sandwiching members 2 and 3 are made of an elastic wire such as a wire.

In the present embodiment, the sandwiching members 2 and 3 are each made of the same continuous wire rod. Each of the sandwiching members 2 and 3 is bent so that the elastic wire rod forms one closed curve and has an elongated shape as a whole. The elastic wire is preferably a wire that is a metal wire having a round cross section. However, the wire rod is not limited to this, and a wire rod or a plate material having a polygonal cross section such as a quadrangle or a hexagon may be used. Further, the surface may be coated with nylon, silicon, Teflon, or plated. Although the term "wire" or "wire" is used in the following description, it does not mean that the wire is limited to a wire, and any known suitable elastic wire may be used.

The thickness of the wire of the wire rod is, for example, 0.3 to 5.0 mm, preferably 0.4 to 4.0 mm, and more preferably 0.4 to 3.2 mm. The total length of the tweezers 1 is 5 cm to 35 cm, preferably 6 cm to 26 cm. Further, the wire rod can be thinned by flattening the working portions 8 and 15 of the sandwiching members 2 and 3, making it easier to pick up a thin one. In addition, an uneven pattern can be provided to prevent the pinched portion from slipping. Further, a coating treatment or the like may be applied so that stains can be easily removed.

The above-mentioned elongated shape of the sandwiching member 2 has a base end portion 7 located at one end close to the user in the used state, an action portion 8 located at the opposite end portion, and a base end portion 7 and an action portion. It has an arm portion 9 located between the eight.

The sandwiching member 2 is made of a series of identical wires. The wire starts from one end 10 (starting end 10) of the base end portion 7 and extends in a direction substantially perpendicular to the longitudinal direction of the sandwiching member 2 (transverse direction) by a distance slightly smaller than the width of the base end portion 7. In FIG. 9A of the base end portion 7, it is bent in the longitudinal direction at the upper corner portion, extends to the working portion 8 via the base end portion 7 and the arm portion 9, is folded back at the tip portion of the acting portion 8, and then is substantially triangular. After forming the action portion 8 of the arm portion 9 and approaching the wire on the upper side in FIG. 9A at the tip end portion of the arm portion 9, it returns to the proximal end portion 7 via the arm portion 9 while slightly expanding, and returns to the proximal end portion 7. In FIG. 9A of FIG. 7, it bends in the transverse direction at the lower corner and extends a distance slightly shorter than the width of the base end portion 7 to reach the end end 11.

The portion extending upward from the start end 10 of the base end portion 7 in FIG. 9 (a) and the portion extending downward in FIG. 9 (a) from the end end 11 form an overlapping portion 12 of the wires. .. That is, the overlapping portion 12 is substantially perpendicular to the direction of the acting portion. The overlapping portion 12 is provided with a twist prevention portion 13 for fixing the wires to each other. Specifically, the twist prevention portion 13 includes spot welding and the like, but it is not limited to spot welding as long as the wires are fixed to each other. For example, it may be welded, bonded, rivet, clamped or the like. Further, the twist prevention portion 13 may have a structure that prevents twisting, and is fixed at two or more points for spot welding, rivets, clamps, etc., and has a certain length for continuous fixing. It may be a department.

In the tweezers 1, the arm portions 9 and 16 are longer than the acting portions 8 and 15, for example, twice or more the length of the acting portions 8 and 15, preferably 3 to 6 times.

For example, when an elastic wire is used for the action part when sandwiching the object between the action parts of tweezers, when a force is applied to the action part, the wire is twisted along the shape of the object centering on the loop part of the action part. When twisting occurs, the force gripped by the acting part is offset and the object is dropped. Therefore, the twist can be suppressed by forming the wire of the acting portion so as to form, for example, a substantially quadrangle closed between the acting portion and the root side of the wire. Further, by connecting the root sides so as to overlap each other, the fixing of the wire is further enhanced and the twist can be further reduced. Utilizing these effects.

By having the twist prevention portion 13, the ends of the wires are fixed to each other, and the rigidity of the base end portion 7 is improved as compared with the case where the wires are free ends, whereby the twist of the sandwiching member 2 is reduced. ..

The longer the portion having the twist prevention portion 13, the higher the rigidity of the portion. For example, when the overlapping portion 12 exists over a long portion and the twist prevention portion 13 is provided over a long length, the rigidity of that portion is further improved. In order to provide the twist prevention portion 13 over a long length, a large number of spot welds may be provided over a long length, a large number of rivets and clamps may be provided, and welding, welding, and adhesion 1 may be provided. One length may be provided longer. Any of the above-mentioned methods can be easily performed, and the rigidity can be easily finely adjusted.

Further, the installation location of the twist prevention portion 13 affects the flexure and torsional rigidity of the sandwiching member 2. For example, if the overlapping portion 12 is in the middle of the arm portion 9, the bending rigidity of the arm portion is increased, and the arm portion 9 is less likely to bend. On the other hand, if the overlapping portion 12 is located at the base end portion 7, the effect of preventing the arm portion 9 from twisting is enhanced. In this way, the delicate balance between bending and twisting can be adjusted by appropriately selecting the installation location of the twist preventing portion 13.

The sandwiching member 3 has a shape and structure symmetrical to those of the sandwiching member 2 when viewed from above in FIG. Although a duplicate detailed description will be omitted, the sandwiching member 3 has a base end portion 14, an acting portion 15, and an arm portion 16 in symmetry with the sandwiching member 2.

Although not shown, the joint between the action part 8 and the action part 15 having a substantially triangular shape is such that when a load is applied to the action part, the lower sides of the substantially triangular part shown in the above contact each other and the upper part gradually hits. By making the substantially triangular portion slightly downward (1 mm to 5 mm, preferably 0.5 mm to 2 mm between the two working portions), even a thin object can be reliably sandwiched.

Further, in the sandwiching member 3, the shapes of the substantially triangular working portion 8 and the acting portion 15 of the sandwiching member 2 do not necessarily have to be symmetrical.

For example, the acting portion 15 may be a larger substantially triangular shape with respect to the substantially triangular acting portion 8, the acting portion 15 may be circular, or the acting portion 15 may be chopstick-shaped. The wire of the sandwiching member 3 has a start end 17, an end 18, and an overlapping portion 19. The overlapping portion 19 is substantially perpendicular to the direction of the acting portion. The overlapping portion 19 is provided with a twist prevention portion 13.

The hinge portion 4 is made of a wire bent into a three-dimensional shape and has elasticity. Hereinafter, the hinge portion 4 is also referred to as an “elastic hinge portion”. Specifically, the elastic hinge portion 4 is formed in the longitudinal direction of the pair of connecting portions 20 and 21 bridged between the sandwiching members 2 and 3 and the sandwiching members 2 and 3 following the connecting portions 20 and 21. It has two pairs of extending longitudinal portions 22, 23, 24, 25 and a pair of end connecting portions 26, 27 connecting the ends of the longitudinal portions 22, 23, 24, 25. The wire has a start end 28 and an end 29. The end connection portion 27 is a wire overlapping portion 30, and is provided with two or more twist prevention portions 13.

The elastic hinge portion 4 of the present embodiment has a three-dimensional shape, but the elastic hinge portion may have a connecting portion bridged between the sandwiching members, and may have a two-dimensional shape, and may have a handle portion. If the structures 5 and 6 move in parallel, it may have only one connecting portion. That is, if there is a connecting portion whose both ends are fixed to the pair of sandwiching members, the connecting portion can function as an elastic hinge portion due to the elastic bending of the connecting portion.

Since the elastic hinge portion 4 of the present embodiment is made of a wire bent into a three-dimensional shape, since the overlapping portion 30 has the twist prevention portion 13, the elastic hinge portion 4 itself has high rigidity and can be twisted. Can be prevented.

In the tweezers 1, the wire rods of the sandwiching members 2 and 3 and the wire rod of the elastic hinge portion 4 are made of separate wire rods, and the elastic hinge portion 4 is connected to both sandwiching members 2 and 3 via connecting members. The connecting member may be any one that connects the elastic hinge portion 4 and the sandwiching members 2 and 3, but in the present embodiment, the connecting member is a handle portion 5 or 6 having a shape that is easy to grip. The handle portions 5 and 6 fill the space between the elastic hinge portion 4 and the sandwiching members 2 and 3.

Since the handle portions 5 and 6 have a symmetrical structure, the handle portion 5 will be described below. The handle portion 5 has a case 31 and a cover 32 having a U-shaped cross section. The case 31 accommodates the base end portion 7 of the sandwiching member 2 and the longitudinal portions 22 and 23 of the elastic hinge portion 4, and is fixed to the case 31 by the pressing members 33 and 34 and the screws 35 and 36. There is. As a result, the sandwiching member 2 and the longitudinal portions 22 and 23 of the elastic hinge portion 4 are integrally connected. After fixing the base end portion 7 of the sandwiching member 2 and the longitudinal portions 22 and 23 of the elastic hinge portion 4 to the case 31, the cover 32 is attached.

The case 31 and the cover 32 may be fixed by latching or tapping and pushing. Further, the handle portions 5 and 6 may be manufactured by integrating the wire and the resin by insert molding.

The handle portion 6 has a similar structure. Reference numerals 37 and 38 indicate screws on the handle 6 side.

FIG. 9B shows the assembled tweezers 1, and by pushing or releasing the handle portions 5 and 6, the acting portion 8 of the sandwiching member 2 and the acting portion 15 of the sandwiching member 3 approach or separate from each other. You can tweezers and pinch or separate objects. At this time, since the arm portions 9 and 16 of the sandwiching members 2 and 3 elastically bend, even if the handle portions 5 and 6 are completely closed, an excessive force is not applied to the object and the object is not damaged. .. By appropriately providing the twist prevention portion 13 described above, an appropriate balance between bending and twist prevention of the sandwiching members 2 and 3 can be obtained.

Since at least the arm portions 9 and 16 of the tweezers 1 are made of elastic wires, even when the handle portion is excessively closed, the acting portion is not subjected to an excessive force due to the bending of the arm portion. As a result, it is possible to prevent the object from being crushed by a strong force.

Since the working parts 8 and 15 that come into contact with the object are wires, the area where they get dirty is small and they are easy to wash. Even if the tip is bent at an acute angle, the wire has a round cross section, so it is rounded and the object is not easily broken. Further, since it is a wire, heat is not easily transferred, and even when handling a hot object, the handle is less likely to get hot. Moreover, since it is a wire, it is lightweight as a whole.

Since the cut portion of the wire is contained in the handle portions 5 and 6, the user does not touch the cut portion that tends to be sharp.

The elastic hinge portion 4 of the tweezers 1 is composed of two wires, but is not limited to this, and may be a plurality of wires (for example, three wires, four wires, five wires).

Further, although the working portion 8 has a substantially triangular shape, it can be made into an appropriate shape depending on the object to be sandwiched.

Since tweezers are used for grasping fragile objects, it is preferable that the tweezers have no burrs on the surface and are smooth. With conventional tweezers, troublesome steps such as filing are required to finish the surface smoothly. In the case of the tweezers of the present embodiment, by using a wire rod having a round cross section, the surface of the working portion becomes smooth, so that a step such as sanding is not required.

FIG. 10 shows another embodiment. The tweezers 40 of FIG. 10 has the same structure as the tweezers 1 except for the structures of the sandwiching members 41 and 42. Therefore, the same handle portion and the elastic hinge portion are designated by the same reference numerals and the description thereof will be omitted. Of FIGS. 10, FIG. 10A shows a perspective view of the sandwiching member, and FIG. 10B shows an overall assembled perspective view.

In FIG. 10A, in the sandwiching member 41, the arm portion 43 and the acting portion 44 project from the handle portion 5. The sandwiching member 41 has large and small loop-shaped outer loops 45 and inner loops 46. In the outer loop 45 and the inner loop 46, the wire rods are formed substantially in parallel, the wire rods expand and separate from each other in the action portion 44, and the wire rods are close to each other in the arm portion 43. In the handle portion 5, a plurality of twist prevention portions 13 for fixing the wire rods to each other are provided at a portion where both ends of the wire rods are gathered. Further, in a portion of the arm portion 43 near the handle portion 5 where the wire rods are close to each other, a plurality of twist prevention assisting portions 13a for assisting the twist prevention of the wire rods are provided.

The sandwiching member 42 has the same structure as the sandwiching member 41. That is, the sandwiching member 42 has an arm portion 47 and an acting portion 48, and has an outer loop 49 and an inner loop 50. A plurality of twist prevention portions 13 are provided at a portion where both ends of the wire rod of the handle portion 6 are gathered. Further, a plurality of twist prevention auxiliary portions 13a for fixing the wires to each other are provided at a portion where the wires of the outer loop 49 and the inner loop 50 near the handle portion 6 of the sandwiching member 42 are close to each other.

The sandwiching member 41 and the sandwiching member 42 each have an elongated planar shape as a whole, and by having the twist prevention portion 13 and the twist prevention auxiliary portion 13a, the acting portions 44 and 48 are oriented in the direction perpendicular to the surface. It is easy to bend, but it is hard to twist. Further, the inner and outer loops are suppressed from bending independently, and the in-plane bending of the elongated planar shape is suppressed. This provides tweezers that are extremely easy to use compared to conventional tweezers of similar shape.

Here, the outer loop 45 and the inner loop 46 show a double structure, but may have a triple structure or more.

FIG. 11 shows (a) a perspective view of one of the sandwiching members 52 and (b) an overall assembled perspective view of the tweezers 51 according to another embodiment. The tweezers 51 of FIG. 11 has the same structure as the tweezers 1 except for the structures of the sandwiching members 52 and 53. Therefore, the same handle portion and the elastic hinge portion are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 11A, the sandwiching member 52 has an arm portion 54 and an acting portion 55. Large and small loops of the sandwiching member 52 are arranged in the same plane in the vertical direction in FIG. 11A. The upper side of the lower loop 57 is adjacent along the lower side of the upper loop 56. Twist prevention portions 13 are provided at both ends of the wire rod of the upper loop 56 and both ends of the wire rod of the lower loop 57, respectively. Further, a plurality of twist prevention auxiliary portions 13a for fixing the wires of the upper loop 56 and the lower loop 57 are provided in a part of the sandwiching member 52 near the base end.

The sandwiching member 53 has the same structure as the sandwiching member 52. That is, the sandwiching member 53 has an arm portion 58 and an acting portion 59, and has an upper loop 60 and a lower loop 61. Twist prevention portions 13 are provided at both ends of the wire rod of the upper loop 60 and both ends of the wire rod of the lower loop 61, respectively. Further, a plurality of twist prevention auxiliary portions 13a for fixing the wires to each other are provided at a portion where the wires of the upper loop 60 and the lower loop 61 near the handle portion 6 of the sandwiching member 53 are adjacent to each other.

The sandwiching member 52 and the sandwiching member 53 each have an elongated planar shape as a whole, and since the sandwiching member 53 has an anti-twisting portion 13, the acting portions 55 and 59 are likely to bend in the direction perpendicular to the surface, but are difficult to twist. It has become. Further, it is possible to suppress the upper and lower loops from flexing independently, and to suppress the bending in the plane of the elongated planar shape. This makes it possible to provide tweezers that are extremely easy to use as compared with conventional tweezers having a similar shape.

Here, the lower loop 57 shows a double structure along the lower side of the upper loop 56, but the loop may have a triple structure or more, and may be combined with a loop that loops inward as shown in FIG.

As an example, the acting portion 55 of one of the gripping members is composed of an upper loop 56 and a front portion of the lower loop 57, and is arranged so as to be arranged in a direction orthogonal to the sandwiching direction and the longitudinal direction, and a gap is provided between the two. Vacant. The tweezers 51 may be configured so that only the long upper loops 56, 60 may come into contact, or both the upper loops 56, 60 and the lower loops 57, 61 may come into contact. Thereby, the tweezers 51 may sandwich the object only with the long upper loops 56, 60, or may sandwich the object with both the long upper loops 56, 60 and the lower loops 57, 61.

The upper loop and the lower loop may be configured to have the same length.

FIG. 12 is an exploded perspective view of the tweezers 62 of another embodiment, which is (a) a perspective view of the handle portion 5a, and (b) a perspective view of the sandwiching members 2a and 3a and the elastic hinge portion 4a. Since the tweezers 62 of the present embodiment has substantially the same structure as the tweezers 1 of FIG. 9, the same parts are given the same reference numerals, and similar parts are given subscripts to explain the duplication. Omit.

As shown in FIG. 12B, the tweezers 62 has a sandwiching member 2a, a sandwiching member 3a, and an elastic hinge portion 4a. The sandwiching member 2a, the sandwiching member 3a, and the elastic hinge portion 4a are made of separate members, and are connected to the handle portion 5a by another handle portion (not shown).

The sandwiching member 2a has a base end portion 7a, an acting portion 8a, and an arm portion 9a between them. The wire of the sandwiching member 2a has an overlapping portion 12, and a plurality of twist preventing portions 13 are provided.

The sandwiching member 2a has substantially the same shape as the sandwiching member 2 of FIG. 9, but has a curved portion 63 for preventing twisting at a part closer to the base end portion 7a. The preventive curved portion 63 can have an outwardly convex triangular shape, but is not limited to this direction and shape. Further, the curved portion 63 is preferably included in the same surface as the surface of the sandwiching member 2a containing the wire rod, but is not limited to this. A curved portion 64 for preventing twisting is also provided at a symmetrical position of the sandwiching member 3a.

On the other hand, inside the handle portion 5a, a curved groove 65 for preventing twisting is provided which fits with the curved portion 63 provided in the wire rod of the sandwiching member 2a. When the sandwiching member 2a and the elastic hinge portion 4a are attached to the handle portion 5a, the curved portion 63 provided in the sandwiching member 2a is fitted into the curved groove 65 for preventing twisting of the handle portion 5a and is fixed. There is. By fitting and fixing the curved portion 63 of the sandwiching member 2a into the curved groove 65, the bending portion 63 is also fixed in addition to the twist preventing portion 13, and the rigidity of the sandwiching member 2a against twisting is improved.

Even when the sandwiching member 3a and the elastic hinge portion 4a are attached to a handle portion (not shown), the curved portion 64 of the sandwiching member 3a is fitted into the handle portion (not shown) and fixed. Similarly, the sandwiching member 3a also has improved rigidity against twisting.

Further, in the present embodiment, the connecting portions 20a and 21a of the elastic hinge portion 4a are provided with elastic curved portions 66 and 67, respectively. The elastically curved portions 66 and 67 can be opened and closed stably by elastically bending and stretching the connecting portions 20a and 21a there. The elastically curved portions 66 and 67 can be curved in any shape, and the shape of the connecting portion itself can be any known shape.

FIG. 13 is an explanatory view showing the tweezers 68 and its usage state according to another embodiment, and is a diagram showing (a) an operation in the approaching direction of the acting portion and (b) an operation in the opening direction of the acting portion. Since the tweezers 68 of the present embodiment has substantially the same structure as the tweezers 1 of FIG. 9, the same parts are given the same reference numerals, and similar parts are given subscripts to explain the duplication. Omit.

As shown in FIG. 13B, the tweezers 68 have a pair of sandwiching members 2b and 3b facing each other and handle portions 5 and 6, and the handle portions 5 and 6 are connected by an elastic hinge portion 4b.

The acting portion 69 of the sandwiching member 2b is a parallel curved portion that curves substantially in a U shape, and the sandwiching member 3b also has an acting portion 70 having a similar shape, but the acting portions 69 and 70 have an arbitrary shape. May be.

The elastic hinge portion 4b has a substantially U-shaped curved shape when viewed from above in the used state, but the curved shape may be any shape. The elastic hinge portion 4b can be a plurality of (for example, two) wire rods. Further, although the elastic hinge portion 4b is shown as a wire rod, the plate material may be curved into the same shape when viewed from above in the used state. Further, the elastic hinge portion 4b may have a three-dimensional shape as shown in FIG.

As a characteristic structure of the present embodiment, the connecting portion of the elastic hinge portion 4b is a predetermined distance (for example, 2.0 to 7.0 cm, preferably 3.0) from the end portion on the side gripped (pushed) by the user. ~ 6.0 cm) is opened and is bridged between the sandwiching members 2b and 3b. Specifically, in the present embodiment, the elastic hinge portion 4b is bridged between the sandwiching members 2b and 3b at substantially the center of the handle portions 5 and 6.

Since the elastic hinge portion 4b is bridged between the sandwiching members 2b and 3b at substantially the center of the handle portions 5 and 6, as shown in FIG. 13A, the force F1 is applied to the front end portions of the handle portions 5 and 6. , F1 can be applied to close the acting portions 69 and 70 in the directions M1 and M1 (approaching direction). On the contrary, as shown in FIG. 13B, by applying the forces F2 and F2 to the rear ends of the handle portions 5 and 6, the acting portions 69 and 70 can be opened in the directions M2 and M2 (separation direction). it can. That is, each of the handle portions 5 and 6 has a portion that is gripped during the closing operation and a portion that is gripped during the opening operation.

Although ordinary tweezers can only be closed by operation, according to the present embodiment, since the tweezers can be opened from the initial state, it is possible to provide tweezers that are sometimes convenient for grasping a large object. That is, when it is usually narrow and just right (for example, 2 cm to 5 cm), but sometimes you want to open it wide (for example, 4 cm to 12 cm), you do not need to prepare two or three types of tweezers. One type can cover it.

For example, if it is opened 1 cm to 2 cm wider than the object to be sandwiched, it is easy to grasp, and if it is opened more than that, it takes effort to narrow it to the width of the object. There is a time lag until picking, which causes a time loss phenomenon.

In order to solve these problems, although not shown here, efficient operation is possible by providing a mechanism for adjusting the position so that it opens slightly larger than the size of the object (for example, 1 cm to 3 cm wider).

Then, for example, when a slightly large object is mixed with the object, a large opening can be easily obtained by applying a force F2 to the rear end portions of the handle portions 5 and 6.

Although it has been described here that the rear ends of the handles 5 and 6 are pushed when the tweezers 68 are opened, the place to push is related to the installation location of the elastic hinges 4, and the rear ends of the handles 5 and 6 are pushed. Not limited to. That is, in a broad sense, when the elastic hinge portion 4b is provided in the portion other than the ends of the sandwiching members 2b and 3b, the portion on the base end (user-side end in the used state) side of the elastic hinge portion 4b is pushed. As a result, the tips of the sandwiching members 2b and 3b (the ends far from the user in the used state) are opened, and the tips of the sandwiching members 2b and 3b are pushed by pushing the portion of the sandwiching members 2b and 3b on the tip side of the elastic hinge portion 4b. Is closed, so the place to push is determined by the relationship with the position of the elastic hinge portion 4b.

14A and 14B are a perspective view of (a) one sandwiching member 131, (b) a perspective view of the other sandwiching member 132, and (c) an overall assembled perspective view of the tweezers 130 according to another embodiment. In the present embodiment, a part of the wire of the sandwiching member 131 also serves as a part of the elastic hinge portion 133. Similarly, a part of the wire of the sandwiching member 132 also serves as another part of the elastic hinge portion 133. Hereinafter, it will be described that the wires of the sandwiching member 131 and the sandwiching member 132 each form a part of the elastic hinge portion 133.

The sandwiching member 131 has a base end portion 134, an action portion 135, and an arm portion 136. The wire of the sandwiching member 131 reaches the surface including the sandwiching member 131 from one end 137 (starting end 137) near the base end portion 134 via the short side 138 in the transverse direction, and subsequently connects the base end portion 134 and the arm portion 136. After extending to the working part 135 and folding back at the tip of the working part 135, a substantially triangular working part 135 is formed, and after approaching the wire on the upper side in FIG. 14A at the tip of the arm part 136, Returning while slightly expanding, after forming the downwardly convex first temporary placement portion 139 in FIG. 14A at the proximal end side portion of the arm portion 136, returning to the proximal end portion 134 and returning to the proximal end portion 134. At the end of the wire, it bends upward in FIG. 14A and reaches the upper side of the base end portion 134.

Subsequently, the wire of the sandwiching member 131 extends a portion forming the longitudinal portion 140 of the elastic hinge portion 133 along the upper side of the base end portion 134, and then bends downward to form the end connecting portion 141 of the elastic hinge portion 133. The constituent portion extends, then the portion constituting the longitudinal portion 142 of the elastic hinge portion 133 extends along the lower edge of the proximal end portion 134, and finally bends in the transverse direction and is perpendicular to the surface including the sandwiching member 131. It reaches the end 144 via the short side 143.

A plurality of twist prevention portions 13 are provided at the overlapping portion of the wires of the base end portion 134 and the longitudinal direction portions 140 and 142.

The sandwiching member 132 has a shape symmetrical to that of the sandwiching member 131, and has a base end portion 145, an acting portion 146, and an arm portion 147. The wire of the sandwiching member 132 reaches the surface including the sandwiching member 132 from the starting end 148 via the short side 149 in the transverse direction, bends in the longitudinal direction of the sandwiching member 132, and bends in the longitudinal direction of the sandwiching member 132, and the base end portion 145, the arm portion 147, and the acting portion 146. To reach the tip of the working portion 146. Subsequently, it is folded back at the tip of the action portion 146 to form a substantially triangle of the action portion 146, and then returns to form the first temporary placement portion 150, returns to the base end portion 145, and returns to the base end portion 145 at the end of the base end portion 145. It bends upward in (a) and reaches the upper side of the base end portion 145.

Subsequently, the wire of the sandwiching member 132 extends a portion constituting the longitudinal portion 151 of the elastic hinge portion 133 along the upper side of the base end portion 145, and then bends downward to form the terminal connecting portion 152 of the elastic hinge portion 133. The constituent portion extends, then the portion constituting the longitudinal portion 153 of the elastic hinge portion 133 extends along the lower edge of the proximal end portion 145, and finally bends in the transverse direction and is perpendicular to the surface including the sandwiching member 132. It reaches the end 155 via the short side 154.

A plurality of twist prevention portions 13 are provided at the overlapping portion of the wires of the base end portion 145 and the longitudinal direction portions 151 and 153.

When assembling the sandwiching member 131 and the sandwiching member 132, the short side 138 and the short side 149, and the short side 143 and the short side 154 are overlapped with each other and fixed to each other. As a result, the short side 138 and the short side 149, and the short side 143 and the short side 154 form a connecting portion of the elastic hinge portion 133, respectively, and serve as a connecting portion between the sandwiching member 131 and the sandwiching member 132.

According to the tweezers 130, the elastic hinge portion 133 is elastically deformed by grasping or releasing the base end portions 134, 145 of the sandwiching members 131, 132, and the acting portions 135, 146 of the sandwiching members 131, 132. Closes and opens.

Further, when the tweezers 130 are placed on the tweezers placing surface, the first temporary placing portions 139 and 150 serve as fulcrums, and the acting portions 135 and 146 are separated from the tweezers placing surface, which is hygienic.

Further, as shown in FIG. 15, the front and rear portions of the first temporary placement portions 139 and 150 also function as finger hook portions, and the tweezers 130 can be easily operated by putting a finger as shown in the figure.

Further, since a plurality of twist prevention portions 13 are provided, the rigidity of the base end portions 134, 145 of the sandwiching members 131, 132 is improved, and twisting can be prevented.

FIG. 16 is a plan view (a) and a side view (b) of the tweezers 190 according to the embodiment of the present invention.

The tweezers 190 have a pair of sandwiching members 191 and 192 configured to be able to elastically approach and release from each other. Each of the sandwiching members 191 and 192 has portions 193 and 194 in which the elastic wire is bent to form one closed curve. The sandwiching members 191 and 192 have base end portions 195 and 196, arm portions 197 and 198, and action portions 199 and 200, respectively. The base end portions 195 and 196 of the sandwiching members 191, 192 are preferably embedded in a part of the tip side of the resin handle portions 201 and 202. The rear ends of the handles 201 and 202 are connected by an elastic hinge portion 205 composed of two or more elastic wire rods 203 and 204. Due to the elastic deformation of the elastic hinge portion 205, the sandwiching members 191 and 192 can elastically repeatedly approach and separate from each other.

The elastic wires 203 and 204 have a U-shape in a plan view and are arranged vertically. The shapes of the elastic wires 203 and 204 are arbitrary, and the number of elastic wires is also arbitrary, but preferably two or more.

Further, the direction of entry of the two ends of the working portions 199 and 200 wires into the handle portions 201 and 202 is the direction of extension of the two ends of the elastic hinge portion 205 from the handle portions 201 and 202. Match. Therefore, it gives a neat impression as if the wires of the working portions 199 and 200 and the hinge portion 205 are connected.

The handle portions 201 and 202 have a substantially rectangular shape when viewed from the side, but the finger hook portion 228 slightly protrudes below the tip portion in the used state, and a finger can be hung on the finger hook portion 228. Therefore, it has a shape that is easy to fit in the hand and easy to operate. The finger hook portion 228 is also used as a temporary placement portion for preventing the action portions 199 and 200 from coming into contact with the mounting surface when the tweezers 190 are placed sideways.

However, the handle portions 201 and 202 may be provided short only in the vicinity of the finger hook portion 228 and may be provided of plastic or the like. For example, it may be provided in the longitudinal direction (direction from the elastic hinge portion toward the acting portion) in the range of 3 to 6 cm, preferably 3.5 to 5.6 cm. Rather than forming the whole with only wires, by providing such handle portions 201 and 202, visibility is improved and it is possible to give the impression that the structure is solid. In addition, the handle is lighter and easier to handle than when the entire handle is made of plastic or the like. Moreover, even if it is dropped, it is possible to reduce the damage to the floor surface. Further, although an example in which the temporary placement portion is formed of plastic or the like is shown here, the temporary placement portion may be formed of a wire and a finger hook portion may be provided at the rear portion.
Further, recesses 206 and 207 are provided at the tips of the handle portions 201 and 202. The recesses 206 and 207 may be shaped to fit the pad of the thumb or index finger. In this case, the recesses 206 and 207 function as finger rests for the thumb and index finger, and can further facilitate the handling of tweezers. The bottoms of the recesses 206 and 207 are inside the wire arrangement portion. The members of the working portions 199 and 200 are wires, and the portions that enter the inside of the handle portions 201 and 202 are arranged so as to avoid the dents 206 and 207. Therefore, the dents 206 and 207 can be made deeper than the wire arranging portion, and a sufficient depth can be secured to fit the pad of the finger.

The elastic wires constituting the sandwiching members 191 and 192 are bent into a substantially rectangular shape at the base end portions 195 and 196, and are substantially parallel to the arm portions 197 and 198, but gradually narrow from the base end side to the tip end side. , The acting portions 199 and 200 have an arc-shaped loop. Both ends of the elastic wire rod overlap at the base end portions 195 and 196 to form an overlapping portion, which are fixed to each other at the overlapping portion and have at least one twist prevention portion 13.

According to the tweezers 190 of the present embodiment, since the acting portions 199 and 200 are arc-shaped loops, it is easy to grasp a small spherical object and the gripped object is not damaged.

However, this embodiment does not limit the shape of the acting portion, and the acting portions 199 and 200 may have various deformations depending on the object to be grasped.

FIG. 17 is a plan view of (a) a plan view, (b) a side view, (c) a plan view showing a usage state, and (d) a plan view showing the usage state of the tweezers 210 according to the embodiment of the present invention. .. In this embodiment, the sandwiching member and the handle portion are characteristically asymmetrical.

As shown in FIG. 17 (a), the tweezers 210 is a sandwich member 211 (hereinafter, if necessary) on the left side (lower side of FIG. 17 (a)) when viewed from the user in the plan view of FIG. 17 (a). It has a "left side tweezers member 211"), and has a tweezers member 212 (hereinafter, if necessary, "right side tweezers member 212") on the right side (upper side of FIG. 17A).

The sandwiching member 212 on the right side has a shape in which the entire body is included in the vertical plane, and as shown in FIG. 17B, the elastic wire rod starts from the base end portion 213 in a side view and has a width toward the tip end portion 213. It passes above the elongated arm portion 214 that becomes narrower, forms an arc loop at the action portion 215, passes under the arm portion 214, returns to the base end portion 213 again, and forms an overlapping portion 219 between elastic wires. ing. In the overlapping portion 219, the wires are fixed to each other, and at least one twist prevention portion 13 is provided.

On the other hand, the sandwiching member 211 on the left side has a shape in which the entire sandwich member 211 is included in the horizontal plane, and as shown in FIG. 17A, the elastic wire rod starts from the base end portion 216 in a plan view and faces the tip end portion 216. While forming a concavo-convex shape, it passes through the inside of the arm portion 217 (the side facing the sandwiching member 212), is folded back in a substantially triangular shape at the acting portion 218, passes through the outside of the straight arm portion 217, and is again the base end portion. Returning to 216, an overlapping portion 219 of elastic wires is formed. In the overlapping portion 219, the wires are fixed to each other, and at least one twist prevention portion 13 is provided.

The base end portion 213 of the right side sandwiching member 212 is at least partially embedded in the handle portion 220. The base end portion 216 of the left side sandwiching member 211 is at least partially embedded in the handle portion 221. The handle portions 220 and 221 are connected by an elastic hinge portion 224 made of wire rods 222 and 223. As shown in FIG. 17A, the handle portions 220 and 221 have asymmetrical shapes that are complementary to each other in a plan view.

The handle 220 and the handle 221 are provided with recesses 225 and 226, which are convenient for putting a finger on.

As shown in FIGS. 17B and 17D, when both the sandwiching members 211 and 212 are closed, the acting portion 218 of the left sandwiching member 211 is on the right side of the left sandwiching member 211 and the right sandwiching member 212. The height and length and the shapes of the acting portions 215 and 218 are appropriately configured so as to enter the inside of the loop of the acting portion 215 of the sandwiching member 212 and enter the occlusal state. When both sandwiching members 211 and 212 are closed, the acting portion 218 of the left sandwiching member 211 enters the loop of the right sandwiching member 212, and its tip is one to the acting portion 215 of the right sandwiching member 212. It is in contact with the part so that it does not shake. As shown in FIG. 17D, a part of the inside of the arm portion 217 of the left side sandwiching member 211 is adapted to enter the right side sandwiching member 212, and serves to guide the sandwiching member 212.

FIGS. 17 (c) and 17 (d) show the usage state of the tweezers 210. As shown in FIGS. 17 (c) and 17 (d), in the tweezers 210 of the present embodiment, the sandwiching member 211 and the sandwiching member 212 are in the process because the acting portions 215 and 218 of both sandwiching members 211 and 212 enter each other. An object can be sandwiched between them, and for example, an elongated object 227 as shown in the figure can be easily grasped. Further, since the acting portions 215 and 218 enter each other and enter an occlusal state, the tips of the sandwiching members 211 and 212 do not wobble, and the object 227 and the like can be firmly grasped.

The tweezers according to one surface of the present invention are tweezers having a pair of sandwiching members configured so as to be able to elastically approach and separate from each other, and the sandwiching member is an elastic wire rod. The wire rod includes at least one portion that is bent to form a closed curve, and the wire rod has a twist prevention portion in which the wire rods are fixed to each other in a part of the closed curve.

The closed curve of the wire rod may have an overlapping portion, and the overlapping portion may have the twist prevention portion. The twist prevention portion may be composed of a plurality of fixing points or linear fixing portions between the wires. The sandwiching member has an acting portion that acts on an object to be sandwiched, and when they approach each other, the acting portion of one of the sandwiching members enters the inside of the acting portion of the other sandwiching member and occludes. It may be configured to be in a state. The sandwiching member is connected by an elastic hinge portion and has an acting portion that acts on an object to be sandwiched, and the elastic hinge portion is a portion of the sandwiching member opposite to the elastic hinge portion. The tip of the sandwiching member may be opened by pressing, and the tip of the sandwiching member may be closed by pushing the portion of the sandwiching member on the side of the acting portion from the elastic hinge portion.

The sandwiching member is connected by an elastic hinge portion, and the elastic hinge portion may be composed of two or more of the wire rods. The sandwiching member may include a plurality of closed curves of the wire rods, and the wire rods having the closed curves may have the twist prevention portion. The elastic hinge portion is made of an elastic wire, has a connecting portion bridged between the sandwiching members, and the wire of the sandwiching member and the wire of the elastic hinge or the wire of the elastic hinge are twisted together. It may have a preventive part. The elastic hinge portion includes a pair of the connecting portions, two pairs of longitudinal portions extending in the longitudinal direction of the sandwiching member following the connecting portion, and a pair of end connections connecting the ends of the longitudinal portions. It may have a three-dimensional shape having a portion, or a two-dimensional shape having a pair of the connecting portions and a pair of terminal connecting portions connecting the ends of the connecting portions.

The wire rod of the sandwiching member and the wire rod of the elastic hinge portion may be made of the same wire rod. The wire rod of the sandwiching member and the wire rod of the elastic hinge portion may be made of separate wire rods, and the elastic hinge portion may be connected to both sandwiching members via a connecting member. The connecting member may form a pair of handle portions facing each other.

The sandwiching member is connected to the elastic hinge portion via a handle portion, and the handle portion may have a length of 3 to 6 cm in the longitudinal direction. The sandwiching member may have a curved portion for preventing twisting in a part of the wire rod, and the handle portion may have a curved groove for preventing twisting that fits with the curved portion provided in the wire rod.

The working portion may have an expanding curved portion, a parallel curved portion, or a motif curved portion whose shape is adapted according to the object to be grasped. The arm portion may have a temporary mounting portion that is bent outward so that the acting portion can be lifted from the tweezers placing surface and the tweezers can be placed. It may have a second temporary place portion in which the main body of the tweezers can be placed in a state of being floated from the tweezers placement surface in cooperation with the temporary place portion of the arm portion.

The arm portion or the base end portion may have at least one finger hook portion that is bent into a shape that allows the user's finger to rest. The connecting portion may be bridged between the sandwiching members at an inner portion at a predetermined distance from the end portion on the side gripped by the user.

The tweezers according to one surface of the present invention are tweezers having a pair of sandwiching members configured so as to be able to elastically approach and separate from each other, and the sandwiching members are elastic wire rods. Has at least one portion that is bent to form a closed curve, has an acting portion that acts on the object to be sandwiched, and when they are close to each other, the acting portion of one of the tweezers is the other of the tweezers. It is configured to enter the inside of the working part and enter an occlusal state.

The tweezers according to one surface of the present invention are tweezers having a pair of sandwiching members configured so as to be able to elastically approach and release from each other, and the sandwiching members are elastic hinge portions. It has an acting portion that is connected by and acts on an object to be sandwiched, and the elastic hinge portion of the sandwiching member is formed by pushing a portion of the sandwiching member on the opposite side of the elastic hinge portion. The tip is opened, and the tip of the sandwiching member is closed by pushing a portion of the sandwiching member on the side of the acting portion from the elastic hinge portion.

The tweezers according to one surface of the present invention are tweezers having a pair of sandwiching members configured so as to be able to elastically approach and release from each other, and the sandwiching members are elastic hinge portions. Connected, the elastic hinge portion is composed of two or more tweezers.

Based on the above description, those skilled in the art may be able to conceive of additional effects and various modifications of the present invention, but the embodiments of the present invention are not limited to the examples of the above-described embodiments. .. Various additions, changes and partial deletions are possible without departing from the conceptual idea and purpose of the present invention derived from the contents defined in the claims and their equivalents.

1c, 1, 40, 51, 62, 68, 130, 190, 210: Tweezers 2c, 2, 3, 3c, 41, 42, 52, 53, 131, 132, 191, 192, 211, 212, 2a, 2a 3, 3a: Tweezers 4c, 4, 133, 205, 224, 4a: Elastic hinges 5c, 5, 6, 201, 202, 220, 221 and 5a: Handles 7, 14, 134, 145, 195, 196, 213, 7a, 14a: Base end 8c, 8, 15, 15c, 44, 48, 55, 59, 69, 70, 135, 146, 199, 200, 215, 218, 8a, 15a: Acting part 9c, 16c : Tweezers 9, 16, 43, 47, 54, 58, 136, 147, 197, 198, 214, 217, 9a: Arms 10, 17, 28, 137, 148: Starting ends 11, 18, 29, 144 , 155: Termination 12, 19, 30, 219: Overlapping part 13, 13a: Twist prevention part 20, 21, 20a, 21a: Connection part 22, 23, 24, 25, 140, 142, 151, 153: Longitudinal part 26, 27, 141, 152: End connection 31: Case 32: Cover 33, 34: Presser member 35, 36, 37, 38: Screw 45, 49: Outer loop 46, 50: Inner loop 56, 60: Upper loop 57, 61: Lower loop 63: Curved portion for prevention 64: Curved portion for preventing twist 65: Curved groove for preventing twist 66, 67: Elastic curved portion 81c, 82c, 83c, 84c, 151c, 152c, 153c , 154c: Loop portion 114, 118: First and second finger hooks 139: First temporary placement portion 138, 143, 149, 154: Short side 150: First temporary placement portion 180, 181: Central members 193, 194 : Closed curved portion 203, 204: Elastic wire rod 206, 207, 225, 226: Recess 215: Overlapping portion 222, 223: Wire rod 227: Object 228: Finger hook portion F1, F2: Force M1, M2: Direction

Claims (11)

A pair of tweezers having a pair of pinching portions for sandwiching an object and a handle for connecting to the pair of pinching portions .
The second pinching portion is a first nip and the other of said pinching portion is the nip of the hand are each formed of a plurality of wires having a loop portion,
The first acting portion, which is a portion of the first sandwiching portion that sandwiches the object, is configured to have a gap equal to or larger than the thickness of the wire rod between the wire rods and to form a layer in the sandwiching direction.
The second acting portion, which is a portion of the second sandwiching portion that sandwiches the object, is configured to have a gap equal to or larger than the thickness of the wire rod between the wire rods and to form a layer in the sandwiching direction.
In the first acting portion and the second acting portion, from the state in which the most proximal tweezers are in contact with each other, the second proximal is in contact with each other and the second proximal is the second proximal to the other. Tweezers characterized by being configured so that the wires can be switched to a state where they are in contact with each other. The tweezers according to claim 1.
The pair of tweezers is characterized in that the sandwiching portions are configured to be concave with respect to each other. A pair of tweezers having a pair of pinching portions for sandwiching an object and a handle for connecting to the pair of pinching portions.
One of the first sandwiched portions, which is the sandwiched portion, and the second sandwiched portion, which is the other sandwiched portion, are composed of a plurality of wire rods having a loop portion.
The action portion, which is a portion of the pair of tweezers that sandwiches the object, is characterized in that one is configured to be convex with respect to the other and the other is configured to be concave with respect to the other. Tweezers to do. A pair of tweezers having a pair of pinching portions for sandwiching an object and a handle for connecting to the pair of pinching portions.
One of the first sandwiched portions, which is the sandwiched portion, and the second sandwiched portion, which is the other sandwiched portion, are composed of a plurality of wire rods having a loop portion.
Tweezers characterized in that the action portions, which are the portions of the pair of sandwiching portions that sandwich the object, are configured to be convex with respect to each other. A pair of tweezers having a pair of pinching portions for sandwiching an object and a handle for connecting to the pair of pinching portions.
At least one of the sandwiched portions, the first sandwiched portion, is composed of a wire rod having a loop portion.
The first sandwiching portion is a twist-preventing portion for fixing the wires to each other, and is a tweezers including a twist-preventing portion for preventing the wires from twisting. The tweezers according to any one of claims 1 to 5.
The tweezers are characterized in that the handle includes a pair of push portions which are connected to the pair of sandwich portions and pushed by the user, and a hinge portion which is connected to the pair of the push portions. The tweezers according to claim 6.
The hinge portion is a tweezers characterized in that it is composed of a plurality of wire rods. The tweezers according to claim 6 or 7.
The tweezers are characterized in that the sandwiching portion and the hinge portion are made of a common wire rod. The tweezers according to any one of claims 1 to 8.
Tweezers characterized in that the entire tweezers are made of a wire rod. A pair of tweezers having a pair of pinching portions for sandwiching an object and a handle for connecting to the pair of pinching portions.
At least one of the sandwiched portions, the first sandwiched portion, is composed of a wire rod having a loop portion.
When they come close to each other, one of the tweezers and the other tweezers intersect at a substantially right angle, and the acting portion that sandwiches the object of the other tweezers is the object of one of the tweezers. Tweezers characterized by entering the inside of the action part, which is the part that sandwiches. The tweezers according to claim 10.
A tweezers characterized in that an acting portion, which is a portion of the other sandwiching portion that sandwiches the object, enters the inside of the acting portion, which is a portion of the other sandwiching portion that sandwiches the object, and enters an occlusal state.

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