Patent Application
20220226968
This application claims priority to and the benefit of JP application number JP2021-006845, filed on Jan. 20, 2021, and incorporated herein by reference in its entirety.
The present invention relates to a tweezers device.
Conventionally, tweezers devices are known for use in soldering and desoldering work of electronic components. As disclosed in Patent Document 1 below, this type of tweezers device has a pair of leg rotatably connected by a hinge, and a soldering iron is attached to each of the pair of leg. In the tweezers device disclosed in Patent Document 1, as shown in FIG. 5, a spring 83 to urge the pair of leg 81, 82 in a direction where the end of the pair of leg 81, 82 spreads outward, and a screw 84 to limit the opening width between the end of the legs 81 and 82 is provided. By turning the screw 84, the acceptable width opening at the end of the pair of legs 81 and 82 can be changed, and the movement of the pair of legs 81 and 82 can be reduced which suppress deterioration of the work efficiency
[Patent Document]
[Patent Document 1] U.S. Pat. No. 5,145,101
However, in tweezers device disclosed in Patent Document 1, the handling of the screw 84 to adjust the acceptable opening width at the end of the pair of legs 81 and 82 could be troublesome. That is, since the screw 84 is arranged on the hand side (on the proximal end than the hinge 85) of the pair of legs 81 and 82, the screw 84 cannot be operated by the hand holding the tweezers device, and need to operate the screw 84 with the other hand.
An object of the present invention is to provide a tweezers device which can easily perform the adjustment of the allowable opening width between the end of the pair of legs.
The tweezers device according to one aspect of the present invention has a first mounting portion for attaching a first tip, a first leg to hold said first mounting portion, a second mounting portion for attaching a second tip, a second leg to hold said second mounting portion, a rotating shaft to rotatably connect said first leg and said second leg, a bias member to bias said first leg and said second leg in a rotating direction of said rotating shaft, working to push away said first distal end of said first leg and said second distal end of said second leg, and an open width adjustment means including a rotatable width adjustment wheel, wherein an acceptable opening width between said first distal end and said second distal end is adjusted by the rotation of said width adjustment wheel. Said width adjustment wheel is positioned distally toward said first distal end and said second distal end than said rotating shaft, and is rotatable centering on the axis along the opening direction of said first distal end and said second distal end.
In the above tweezers device, the width adjusting wheel for adjusting the acceptable opening width between the first distal end of the first leg and the second distal end of the second leg is arranged on the distal side toward the first distal end and the second distal end than said rotating shaft. Therefore, using the thumb of the hand holding the tweezers device, the width adjusting wheel can be operated. Moreover, the axial center of the width adjusting wheel extends in the direction along the opening direction of the first distal end and the second distal end. Therefore, it is easy to rotate the width adjusting wheel in the direction in which the thumb of the hand holding the tweezers device can be moved. That is, it is easy to operate the width adjusting wheel with the hand holding the tweezers device. Therefore, the acceptable opening width between the ends of the pair of legs can be easily adjusted. Further, since the width adjusting wheel is located on the distal side of the rotation shaft, the tweezers device does not become large.
The bias member may include a leaf spring having a first end engaged to the first leg and a second end engaged to the second leg, which is placed along the first leg and the second leg.
In this embodiment, the leaf spring is used to bias the first leg and the second leg. Since the leaf spring is placed along the first leg or the second leg, the bias member can be made inconspicuous.
The tweezers device may further include an adjusting member to adjust the position between the first distal end of the first leg and the second distal end of the second leg in the direction of said rotating shaft. The adjusting member may include a position adjusting wheel and an eccentric shaft provided in a position eccentric from the center of said position adjusting wheel. Further, the leaf spring may be formed with an elongated hole. In this case, the eccentric shaft of said position adjusting wheel is inserted into said elongated hole, and by the rotation of said position adjusting wheel, the relative position between the first distal end and the second distal end is changed in the direction of said rotating shaft.
In this embodiment, the eccentric shaft revolves by rotating the position adjusting wheel, so the relative position of the position adjusting wheel center with respect to the leaf spring changes. As a result, the relative position between the first distal end and the second distal end in the direction of the rotation shaft changes. Therefore this could be used when it is desired to arrange the second distal end at a position slightly deviated from the first distal end in the rotating shaft direction, or when the first distal end and the second distal end are slightly deviated in the rotation axis direction and needs to be aligned. Moreover, the position between the first distal end and the second distal end can be adjusted with a simple configuration in which the eccentric shaft of the position adjusting wheel is inserted through the elongated hole formed in the leaf spring.
The tweezers device according to another aspect of the present invention, the tweezers device has a first mounting portion for attaching a first tip, a first leg to hold said first mounting portion, a second mounting portion for attaching a second tip, a second leg to hold said second mounting portion, a bias member having a first bias portion where the first mounting portion is fixed and a second bias portion where the second mounting portion is fixed, wherein the bias member bias the first leg and the second leg in a direction to push away said first distal end of said first leg and said second distal end of said second leg from each other, and an open width adjusting means including a rotatable width adjustment wheel, an acceptable opening width between the first distal end and the second distal end is adjusted by the rotation of the width adjustment wheel. The width adjustment wheel is rotatable centering on the axis along the opening direction of said first distal end and said second distal end at a position distally toward said first distal end and said second distal end than the connecting portion of said first bias portion and said second bias portion.
In the above tweezers device, the width adjusting wheel for adjusting an acceptable opening width between the first distal end of the first leg and the second distal end of the second leg is provided at a position of the first distal end and the second distal end side than the connecting portion of the first bias portion or the second bias portion. Therefore, with the thumb of the hand holding the tweezers device, the width adjusting wheel can be touched. Moreover, the axial center of the width adjusting wheel extends in the direction along the opening direction of the first distal end and the second distal end. Therefore, it is easy to rotate the width adjusting wheel in the direction in which the thumb of the hand holding the tweezers device can be moved. That is, it is easy to operate the width adjustment wheel with the hand holding the tweezers device. This makes the adjustment of the acceptable opening width between the distal ends of the pair of legs easy. Further, since the width adjusting wheel is located on the distal side than the connecting portion, the tweezers device does not become large.
In the above tweezers device, the width adjusting wheel may be in contact with a surface of the first leg opposite to the second leg. In this case, the open width adjusting means may include a stopper which is positioned on the second leg on the side opposite to the first leg, which the distance between the width adjusting wheel and the stopper changes by the rotation of the width adjusting wheel. The acceptable opening width is regulated by the stopper and the width adjusting wheel.
In this embodiment, the width adjusting wheel and the stopper are located on the outer side the first leg and the second leg. The acceptable opening width of the first distal end and the second distal end is adjusted by changing the distance between the width adjusting wheel and the stopper.
The acceptable opening width may be adjustable until the first soldering tip and the second soldering tip comes into contact. In this embodiment, a very small IC component may be pinched. Also, when the first tip and the second tip in contact to each other, the tweezers device may be used as a soldering iron.
The width adjusting wheel may be rotatably held in place so that it will not be pushed away from said first leg.
In this embodiment, since the width adjusting wheel is held so as not to be separated from the first leg, when the operation of closing both legs is performed, the width adjusting wheel will move along together with the first leg. Therefore, it is possible to avoid the width adjusting wheel falling off from the first leg.
The first mounting portion is positioned on the opposing side of the second leg with respect to said first leg, and a space may be formed between said first leg and second leg. In this case, the width adjusting wheel may be arranged within this space.
In this embodiment, the width adjusting wheel is provided in the space between the first mounting portion for mounting the first tip, and the first leg for holding the first mounting portion. That is, the width adjusting wheel is arranged in the space between the members required as a tweezers device. Therefore, it is possible to prevent the tweezers device from becoming large.
The above tweezers device may further include a positon adjusting wheel. In this case, upon rotation of the position adjusting wheel, it may adjust the position between the first distal end and the second distal end in the direction orthogonal to the virtual plane formed by the movement trace of the first leg and the second leg.
In this embodiment, a position adjusting wheel is provided in addition to the width adjusting wheel. The adjustment of acceptable opening width, and the adjustment of position between the first distal end and the second distal end in the rotating shaft direction are done by the rotation of respective wheels. Therefore, it is possible to provide a tweezers device that can perform two types of adjustments, and both adjustment are easy to operate.
The width adjusting wheel and the position adjusting wheel may be rotatable around the axis parallel to each other.
In this embodiment, the adjustment of the acceptable opening width and the adjustment of the position between the first distal end and the second distal end in the rotating shaft direction, can be done by operation in the same direction.
The above tweezers device may further comprise a housing which covers the first mounting portion and the second mounting portion. In this case, the width adjustment wheel and the position adjustment wheel may expose from said housing from the same direction.
In this embodiment, the two adjustments (adjustment of the acceptable opening width and adjustment of the position between the first distal end and the second distal end in the rotation shaft direction) may be accessed from the same direction with respect to the housing. Therefore, the two adjustments can be made without changing the orientation of the housing.
The housing may have a first housing which covers said first mounting portion, and a second housing which covers said second mounting portion. In this case, the width adjusting wheel may be arranged in said first housing so a part of the width adjusting wheel expose from said first housing, and the positon adjusting wheel may be arranged in said second housing so a part of said position adjusting wheel expose from said second housing.
In this embodiment, the width adjusting wheel and the position adjusting wheel are separately arranged in the first housing and the second housing. Therefore, when using the tweezers device, it becomes easy to distinguish the width adjustment wheel and the position adjustment wheel.
The width adjusting wheel and the position adjusting wheel may be arranged that it will partially overlap when seen from side view.
In this embodiment, the space required for arranging the width adjusting wheel and the position adjusting wheel can be suppressed. Therefore, it is possible to prevent the tweezers from becoming large.
As described above, according to the present invention, the adjustment of the acceptable opening width between the ends of the pair of legs may be easily performed.
The embodiments of the present invention will be described in detail with reference to the drawings below.
As shown in
The tweezers device 10 includes a housing 12, having a first housing 12a on the side where the first tip 1 is held, a second housing 12b on the side where the second tip 2 is held, and a proximal housing 12c located on the proximal end side of the first housing 12a and the second housing 12b.
As shown in
A power supply line 21 is connected to the first mounting portion 15, and the electric power supplied through the power supply line 21 causes the first tip 1 attached to the first mounting portion 15 to generate heat. The power supply line 21 is also connected to the second mounting portion 17, and by the electric power supplied through the power supply line 21, the second tip 2 attached to the second mounting portion 17 generates heat.
The first mounting portion 15 is positioned on the opposite side of the second leg 18 relative to the first leg 16. The second mounting portion 17 is positioned on the opposite side of the first leg 16 relative to the second leg 18. That is, the first mounting portion 15 and the second mounting portion 17 are positioned outside of the first leg 16 and the second leg 18.
Further, a space 20a is formed between the first mounting portion 15 and the first leg 16, and also a space 20b is formed between the second mounting portion 17 and the second leg 18. The first mounting portion 15 is held by the first leg 16 inclined with respect to the first leg 16, and the second mounting portion 17 is held by the second leg 18 inclined with respect to the second leg 18.
That is, the first mounting portion 15 is held by the first leg 16 so the first tip 1 faces inward with respect to the extending direction of the first leg. Further, the second mounting portion 17 is held by the second leg 18 so that the second tip 2 faces inward with respect to the extending direction of the second leg 18.
The first mounting portion 15 is held by the first leg 16 and the first housing 12a via the first connecting portion 25. The second mounting portion 17 is held by the second leg 18 and the second housing 12b via the second connecting portion 26.
The first mounting portion 15 is arranged in the space defined by the first housing 12a and the first leg 16, and the second mounting portion 17 is arranged in the space defined by the second housing 12b and the second leg 18. On the other hand, the first connecting portion 25 is arranged so it will expose at the distal end of the first housing 12a (upper end in
The first connecting portion 25 is held sandwiched between the distal end (the upper end in
The first mounting portion 15 and the second mounting portion 17 has same configuration, and also the first connecting portion 25 and the second connecting portion 26 has the same configuration. Since
The second connecting portion 26 is formed by an annular member, so the second mounting portion 17 is inserted. The second connecting portion 26 has a knob 26a with plurality of convex arranged in the circumferential direction, and a cylindrical portion 26b on the proximal side of the knobs 26a. The cylindrical portion 26b is positioned inside the second housing 12b, and is rotatably held between a second holding portion 18b of the second leg 18 and the second housing 12b. On the other hand, the knob 26a is exposed outside of the second housing 12b and is used to rotate the second connecting portion 26.
The second mounting portion 17 has a base portion 17a, and a top portion 17b that is formed separately from the base portion 17a and is located on the distal side of the base portion 17a.
The second tip 2 is inserted through the top portion 17b into the base portion 17a, and is supported by the base portion 17a. The top portion 17b is connected to the base portion 17a inside the second connecting portion 26, and is rotatable with respect to the base portion 17a. When the top portion 17b is rotated with respect to the base portion 17a, it is configured that the second tip 2 held by the base portion 17a will rotate.
A protrusion 17c is provided on the top portion 17b, and the protrusion 17c can engage with the convex stopper 18e formed on the second leg 18 when the top portion 17b is rotated. As a result, the rotation range of the top portion 17b, that is, the rotation range of the second tip 2 is regulated.
A female screw 26d is provided on the inner surface of the cylindrical portion 26b of the second connecting portion 26. On the other hand, a male screw 17d is provided on the outer surface of the tip of the base portion 17a of the second mounting portion 17, and the male screw 17d is screwed into the female screw 26d of the second connecting portion 26. Therefore, when the knob 26a of the second connecting portion 26 is rotated, the second mounting portion 17 is displaced with respect to the second connecting portion 26 in a front-rear direction (vertical direction in
Since the first connecting portion 25 is also configured in the same manner as the second connecting portion 26, the first tip 1 attached to the first mounting portion 15 may be displaced in the front-rear direction, and also the first tip 1 may be rotated. Therefore, the relative position between the ends of the first tip 1 and the second tip 2 in the front-rear direction can be adjusted.
Returning to
On the first leg 16, a block base 16c is provided at the proximal side of the hole. The power supply line 21 is arranged above of the base 16c. Further, a leaf spring 30 is fixed to the base 16c.
The leaf spring 30 works as a bias member to bias the first leg 16 and the second leg 18, in a direction so the first distal end 16d of the first leg 16 and the second distal end 18d of the second leg 18 are pushed away from each other. The leaf spring 30 extends from the base 16c of the first leg 16 to the second leg 18, along the outer surfaces of the first leg 16 and the second leg 18. The leaf spring 30 has a first end 30a engaged to the first leg 16 and a second end 30b engaged to the second leg 18.
The first end 30a of the leaf spring 30 is fixed to a side surface 16e of the base 16c, where the side surface 16e extends in a longitudinal direction (vertical direction in
Therefore, when first tip 1 and second tip 2 are pushed close to each other in operation, a restoring force is generated in the leaf spring 30.
The leaf spring 30 urges the first distal end 16d of the first leg 16 and the second distal end 18d of the second leg 18 to move away from each other. The acceptable opening width between 16d and 18d may be regulated by the width adjusting wheel 33b and the stopper 33c, which will be described later.
The tweezers device 10 is provided with an open width adjusting means 33 for adjusting the allowable open width between the first distal end 16d and the second distal end 18d.
Specifically, the open width adjusting means 33 includes a shaft 33a bridged between the first leg 16 and the second leg 18, a width adjusting wheel 33b for performing the adjustment of allowable width, a stopper 33c to regulate the open width between the first leg 16 and the second leg 18 together with the width adjusting wheel 33b, and a displacement means 33d to change the position of the width adjusting wheel 33b against the shaft 33a.
The shaft member 33a has one end inserted into a through hole formed in the first leg 16 and the other end inserted into a through hole formed in the second leg 18. The axial center of the shaft 33a extends in a direction along the opening direction of the first distal end 16d and the second distal end 18d. The direction of this axial center is orthogonal to the rotation shaft 19. In the present embodiment, the shaft 33a is inserted through the through hole so as not to rotate around the axis. For example, the shaft member 33a has a non-circular cross section instead of a circular cross section to avoid rotation.
The width adjusting wheel 33b and the stopper 33c are arranged to sandwich the first leg 16 and the second leg 18. That is, the width adjusting wheel 33b is provided on the opposite side of the second leg 18 with respect to the first leg 16, and the stopper is provided on the opposite side of the first leg 16 with respect to the second leg 18.
The stopper 33c is provided at the end of the shaft 33a, has a width larger than the shaft 33a, and is formed in a size that will not go through the through hole. Therefore, the shaft 33a will not come off from the through hole of the second leg 18. Here, the stopper 33c is formed integrally with the shaft 33a, however, it may be formed separately from the shaft 33a and then fixed to the shaft 33a.
With the shaft 33a, the displacement means 33d includes a male screw 33e formed on the end opposite to the end where the stopper 33c is provided, and a female screw 33f provided on the inner surface of the width adjusting wheel 33b, the width adjusting wheel 33b formed annular and to fit on the shaft 33a. Therefore, when the width adjusting wheel 33b is rotated with respect to the shaft 33a, the width adjusting wheel displaces in the direction of the axial center of the shaft 33a, which will change the width of the width adjusting wheel 33b and the stopper 33c. As a result, the acceptable opening width of the first leg 16 and the second leg 18 are adjusted. In the embodiment, this acceptable opening width can be minimized until the first tip 1 and the second tip 2 comes into contact with each other. The female screw 33f on the inner surface of the width adjusting wheel 33b may be formed as a nut embedded in the width adjusting wheel.
The width adjusting wheel 33b is provided in the wheel holding portion (first wheel holding portion) 16f formed on the first leg 16, and is rotatably held in position by the first wheel holding portion and the first housing 12a.
The first wheel holding portion 16f is located at an intermediate portion between the first distal end 16d and the base end (hole that supports the rotating shaft 19) of the first leg 16, and is located outside the first leg 16 (opposite side of the second leg 18), and is integrally formed with the first leg 16. Therefore, the width adjusting wheel 33b is arranged on the distal side of the rotating shaft 19. In other words, the width adjusting wheel 33b is arranged at positions closer to the first distal end 16d and the second distal end 18d than the rotating shaft 19.
The first wheel holding portion 16f has an inner peripheral surface matching the outer peripheral surface of the width adjusting wheel 33b, and the first housing 12a is adjacent to the first wheel holding portion 16f. Therefore, the width adjusting wheel 33b is held in place so as not to get away from the first wheel holding portion 16f. That is, the width adjusting wheel 33b is held in place with the first leg 16. Therefore, even if the position of the width adjusting wheel 33b with respect to the shaft 33a is displaced, the position of the width adjusting wheel 33b with respect to the first leg 16 does not change. Meanwhile, when the first tip 1 and the second tip 2 are operated to bring close to each other (not the adjustment of the opening width but the closing operation for pinching the electronic component), the first leg will not go away from the width adjusting wheel 33b, but the second leg 18 will separate away from the stopper 33c.
The width adjusting wheel 33b is arranged in the space 20a between the first leg 16 and the first mounting portion 15.
The tweezers device 10 further includes an adjusting member 36 which adjust the relative position between the first distal end 16d of the first leg 16 and the second distal end 18d of the second leg 18 in the extending direction of the rotating shaft 19. The adjusting member 36 adjusts the relative position of the first distal end 16d and the second distal end 18d in a direction orthogonal to the virtual plane formed by the movement trace of the first leg 16 and the second leg 18 (i.e. direction orthogonal to the paper surface of
The adjusting member 36 includes a position adjusting wheel 36a and an eccentric shaft 36b. As shown in
The eccentric shaft 36b is bridged between the first leg 16 and the leaf spring 30. Therefore, the position adjusting wheel 36a is prevented from tilting. Further, the eccentric shaft 36b is arranged parallel with the shaft 33a. Therefore, the width adjusting wheel 33b and the position adjusting wheel 36a can rotate around an axis parallel to each other. This will allow both wheels 33b and 36a to be operated in the same direction.
The eccentric shaft 36b is fixed to the position adjusting wheel 36a eccentric from the center of the position adjusting wheel 36a. The eccentric shaft 36b is inserted into the elongated hole 16g (see
The elongated hole 16g and the elongated hole 30c have lengths that cover the range in which the eccentric shaft 36b revolves. Therefore, when the eccentric shaft 36b revolves by the position adjusting wheel 36a being rotated, the eccentric shaft 36b will show reciprocate movement in the elongated hole 16g and the elongated hole 30c.
When the eccentric shaft 36b revolves, the first leg 16 will cause a swing movement having the connecting portion of the rotating shaft 19 as the center, so the first distal end 16d will displace with respect to the second distal end 18d in the extending direction of the rotating shaft 19. Accompanied by this swing movement, the relative position of the first distal end 16d of the first leg 16 and the second distal end 18d of the second leg 18 will change in direction of the rotating shaft 19. The connecting portion between the second leg 18 and the first leg 16 has some play that will allow this swing movement. Since the first end 30a of the leaf spring 30 is coupled to the base 16c of the first leg 16, by the revolution of the eccentric shaft 36b, the leaf spring 30 will swing around the connection portion of the rotating shaft 19 as the center.
As shown in
The width adjusting wheel 33b expose from the first housing 12a, and the position adjusting wheel 36a expose from the second housing 12b. That is, the width adjusting wheel 33b is arranged on the first housing 12a side partially exposed, and the position adjusting wheel 36a is arranged on the second housing 12b side partially exposed. Since the width adjusting wheel 33b and the position adjusting wheel 36a are separately arranged in the first housing 12a and the second housing 12b, it is easy to distinguish the two wheels 33b and 36a when the tweezers device 10 is used, which avoids the wheels being mistakenly operated.
As described above, in the present embodiment, the width adjusting wheel 33b for adjusting the acceptable opening width between the first distal end 16d of the first leg 16 and the second distal end 18d of the second leg 18 is provided at a distal position (toward first distal end 16d and second distal end 18d) than the rotation shaft 19.
Therefore, when holding the tweezers device 10, the thumb of the hand holding the first leg 16 and the second leg 18 can touch the width adjusting wheel 33b. Moreover, the shaft 33a extends in a direction parallel to the direction connecting the first distal end 16d and the second distal end 18d. Therefore, it is easy to rotate the width adjusting wheel 33b in the direction which the thumb will move while the hand holding the first leg 16 and the second leg 18. That is, it is easy to operate the width adjusting wheel 33b with the hand holding the tweezers device 10. Therefore, the acceptable opening width between the ends 16d and 18d of the pair of legs 16 and 18 can be easily adjusted. Further, since the width adjusting wheel 33b is located on the distal side than the rotating shaft 19, the tweezers device 10 does not become large.
Further, in the present embodiment, the acceptable opening width can be adjusted until the first tip 1 and the second tip 2 come into contact with each other, so a very small electronic component may be pinched by the soldering device 5. Further, when the first tip 1 and the second tip 2 are used in contact with each other, it can also be used as a soldering iron having double heat capacity.
Further, in the present embodiment, since the width adjusting wheel 33b is held by the first wheel holding portion 16f of the first leg 16, it is possible to rotate the width adjusting wheel 33b without providing a support of the shaft 33a on the first leg 16. Further, since the width adjusting wheel 33b is hold in place in the first leg 16, when the operation of pinching/closing the legs 16 and 18 is performed, the width adjusting wheel 33b moves together with the first leg 16. Therefore, it is possible to avoid the width adjusting wheel 33b falling off from the first leg 16. When the legs 16d and 18d are closed/pinched, even the width adjusting wheel 33b is held in place together with the first leg 16, the operation of closing the legs 16 and 18 is not hindered since the stopper 33c will be pushed away from the second leg 18.
Further, in the present embodiment, the width adjusting wheel 33b is arranged in the space 20a between the first mounting portion 15 and the first leg 16. That is, the width adjusting wheel 33b is arranged in the space between the components required for the tweezers device 10. Therefore, it is possible to prevent the tweezers device 10 from becoming large in size.
Further, in the present embodiment, a leaf spring 30 is used to urge the first leg 16 and the second leg 18 away, and the leaf spring 30 is provided along the first leg 16 or the second leg 18. Therefore, the bias member that urge the legs 16 and 18 can be made inconspicuous or hided.
Further, in the present embodiment, by rotating the position adjusting wheel 36a, the eccentric shaft 36b revolves and the relative position of the center of the position adjusting wheel 36a with respect to the leaf spring 30 changes. As a result, the relative position between the first distal end 16d and the second distal end 18d in the extending direction of the rotation shaft 19 changes. Therefore, this function can deal in cases when it is desired to arrange the second distal end 18d at a position slightly deviated from the first distal end 16d in the rotation shaft 19 direction, or when the first distal end 16d and the second distal end 18d are slightly deviated in the rotation shaft 19 direction and needs to be aligned. Moreover, the position adjustment between the first distal end 16d and the second distal end 18d can be performed with a simple configuration in which the eccentric shaft 36b of the position adjusting wheel 36a is inserted through the elongated hole 30c formed in the leaf spring 30.
Further, the acceptable opening width and the position adjustment between the first distal end 16d and the second distal end 18d in the rotation shaft 19 direction is adjusted by rotating the wheels 33b and 36a, respectively. Therefore, the tweezers device 10 can perform two types of adjustment operations, and each of the adjustment operation can be easily performed.
Further, in the present embodiment, the width adjusting wheel 33b and the position adjusting wheel 36a are exposed from the housing 12 in the same direction, so the two adjustments (adjustment of acceptable opening width and the position adjustment between the first distal end 16d and the second distal end 18d in the rotating shaft 19 direction) may be accessed from the same side with respect to the housing 12. This allows the adjustment to be performed without changing the orientation of the housing 12.
In the first embodiment, a rotation shaft 19 for rotatably connecting the first leg 16 and the second leg 18 is provided. On the other hand, in the tweezers device 50 of the second embodiment, the first leg 16 and the second leg 18 can be closed/pinched without the rotating shaft 19 being provided.
Specifically, the tweezers device 50 includes a bias member 52 having a first bias portion 52a and a second bias portion 52b. The bias member 52 has a connecting portion 52c that connects the proximal end of the first bias portion 52a and the proximal end of the second bias portion 52b. The bias member 52 is biased in a direction which the distal end of the first bias portion 52a and the distal end of the second bias portion 52b are pushed away from each other (opening direction). The first leg 16 is fixed to the first bias portion 52a on the distal side than the connecting portion 52c, and the second leg 18 is fixed to the second bias portion 52b on the distal side than the connecting portion 52c.
The bias member 52 has an elastic force in a direction in which the first distal end 16d of the first leg 16 and the second distal end 18d of the second leg 18 are pushed away from each other. The acceptable opening width of the first leg 16 (or the first bias portion 52a) and the second leg 18 (or the second bias portion 52b) is adjusted by the width adjusting wheel 33b and the stopper 33c.
The width adjusting wheel 33b is positioned close to the first distal end 16d and the second distal end 18d than the connecting portion 52c of the end of the first bias member 52a and the end of the second bias member 52b. The axial center of the width adjusting wheel 33b, that is, the axial center of the shaft 33a is along with the opening direction of the first distal end 16d and the second distal end 18d.
Therefore, in the second embodiment, the width adjusting wheel 33b for adjusting the acceptable opening width between the first distal end 16d of the first leg 16 and the second distal end 18d of the second leg 18 is arranged at a position closer to the first distal end 16d and the second distal end 18d than the connecting portion 52c of the first bias portion 52a and the second bias portion 52b. Therefore, the hand holding the tweezers device 50 can touch the width adjusting wheel 33b with its thumb. Moreover, the axial center of the width adjusting wheel 33b extends in the direction along the opening direction of the first distal end 16d and the second distal end 18d. Therefore, it is easy to rotate the width adjusting wheel 33b in the direction in which the thumb of the hand holding the tweezers device 50 can be moved. That is, it is easy to operate the width adjusting wheel 33b with the hand holding the tweezers device 50. Therefore, the acceptable opening width between the ends 16d and 18b of the pair of legs 16 and 18 can be easily adjusted. Further, since the width adjusting wheel 50 is located on the distal side than the connecting portion 52c, the tweezers device 50 does not become large.
In the bias member 52 shown in
Although the description of other configurations, actions, and effects will be omitted, the description of the first embodiment can be incorporated into the second embodiment.
It should be noted that the embodiments disclosed are exemplary in all respects and are not considered to be restrictive. The present invention is not limited to the embodiment described above, and various modifications and improvements can be made without departing from the spirit of the present invention. For example, in the first and second embodiments, the acceptable opening width is adjusted by rotating the female screw 33f of the width adjusting wheel 33b with respect to the male screw 33e of the shaft 33a, but the configuration is not limited to this. For example, the width adjusting wheel 33b may be integrally formed with the shaft 33a so that the shaft 33a also rotates. In this case, the female screw 33f is fixed to the first leg 16 and this female screw 33f may screw with the male screw 33e of the shaft member 33a.
Further, when the width adjusting wheel 33b is provided integrally with the shaft member 33a, the width adjusting wheel 33b may be allowed to be pushed away from the first leg 16. In this case, the stopper 33c may be provided with the female screw 33f, and the shaft 33a may be provided with the male screw 33e, which will screw with the female screw portion 33f. In this case, the stopper 33c will not be pushed away from the second leg 18.
In the first and second embodiments, the width adjusting wheel 33b and the stopper 33c sandwich the first leg 16 and the second leg 18 from both sides, but the present invention is not limited to this. For example, the width adjusting wheel 33b may be arranged between the first leg 16 and the second leg 18, while the shaft 33a being provided with a female screw (not shown) at the end opposite to the stopper 33c, and the first leg 16 and the second leg 18 may be sandwiched from both sides by this female screw and the stopper 33c.
In the first embodiment, the base 16c which the leaf spring 30 is engaged is provided on the first leg 16, but the base which the leaf spring 30 is engaged may be provided on the second leg 18 instead of the first leg 16, in the position where the base 16c is provided in
In the first embodiment, the leaf spring 30 is formed in a shape extending in one direction from the base 16c of the first leg 16 along the second leg 18, but is not limited to this configuration. For example, the leaf spring 30 may be formed in a U shape and arranged along the first leg 16 and the second leg 18. That is, the leaf spring 30 will have a configuration including a first portion located outside the first leg 16, a second portion located outside the second leg 18, and a connecting portion to connect the end of the first portion and the second portion. In this case, the leaf spring 30 may be arranged along the outer surface of the first leg 16 and the second leg 18, or may be arranged along the inner surface.
Further, in the first embodiment, the leaf spring 30 is used as the bias member for biasing the first leg 16 and the second leg 18, but a coil spring may be used instead of the leaf spring 30. In this case, the coil spring will be arranged between the first leg 16 and the second leg 18 in a compressed state.
In the first and second embodiments, the connecting portions 25 and 26 are provided, and the first connecting portion 25 is configured so the first mounting portion 15 can be displaced in the front-rear direction with respect to the first leg 16, but is not limited to this configuration. For example, the first connecting portion 25 may be configured so the first mounting portion 15 will not move. Further, the first connection portion 25 may be omitted. In this case, the first mounting portion 15 will be held by the first leg 16 and the first housing 12a without moving in front-rear direction. The second connection portion 26 can also be omitted in the same manner.
The first mounting portion 15 rotatably holds the first tip 1, but is not limited to this configuration. The first mounting portion 15 may be configured to hold the first tip 1 so it will not rotate. This is same with the second mounting portion 17.
In the above embodiment, the width adjusting wheel 33b is arranged in the space 20a between the first mounting portion 15 and the first leg 16, but is not limited to this configuration. The width adjusting wheel 33b may be arranged at a position overlapping the first mounting portion 15.
In the first embodiment, an adjusting member 36 for adjusting the position between the first tip 1 and the second tip 2 in the direction of the rotation shaft 19 is provided, but the adjusting member 36 may be omitted. Further, the adjusting member 36 may be configured to adjust the position without using the leaf spring 30.
The width adjusting wheel 33b and the position adjusting wheel 36a may be exposed from the housing 12 in different directions. Further, the width adjusting wheel 33b and the position adjusting wheel 36a may both be arranged in the first housing 12a.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2021-006845 | Jan 2021 | JP | national |
