JP2803030B2 - Hand torque screwdriver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand torque driver, and more particularly, to a hand torque driver capable of easily visually confirming the limit of torque applied to a treatment tool with a compact and simple mechanism.

[0002]

2. Description of the Related Art In dental implant surgery, for example, a screw hole is formed in a bone with a treatment tool such as a tap attached to a handpiece (screw processing), and an implant material which has been previously threaded is embedded in the screw hole. However, due to insufficient torque of the handpiece and the operation of the torque limit mechanism, the screw hole cannot be set to the desired depth, and the screw processing is finished to the end with a ratchet wrench with a ratchet at the tip.

In recent years, a hand torque driver has been proposed in which a manual torque controller for applying a predetermined torque to the treatment tool is attached to a rear end of a hand piece having a treatment tool attached to the tip in implant surgery. I have.

[0004]

However, in the former ratchet wrench, there is a limit to downsizing the ratchet while maintaining the torque capacity that can withstand the finishing of the screw processing, that is, downsizing the wrench tip. Yes,
There was a problem with workability in the oral cavity. In addition, since the ratchet wrench cannot be used with handpiece treatment tools, it is necessary to replace the treatment tool with one with a hexagonal head that can handle the ratchet wrench at the time of finishing screw processing, which requires extra labor. There is.

On the other hand, in the latter hand torque driver, a torque limiter is provided, and when the torque applied to the treatment tool exceeds the limit, a manual torque controller that is driven to rotate idles. Although it is possible to know the limit of the torque by listening to the sound of the idle rotation (noise sound), for example, at the time of implant surgery, the maximum torque to be applied to the required treatment tool (preset torque) When the torque value is slightly smaller than the predetermined torque that can be applied by the manual torque controller, a torque exceeding the maximum torque is applied, and the treatment tool or the like is often damaged. Was. Also, in the conventional hand torque driver, when the torque applied to the treatment tool approaches the limit addition, a feeling of weight is generated when the manual torque controller is rotationally driven, but it is not possible to visually confirm it. Since no consideration was given, it was extremely difficult to visually check how much the torque to the treatment tool reached the limit by rotating the manual torque controller.

The present invention focuses on the above-mentioned drawbacks of the prior art and solves it. The purpose of the present invention is to make it possible to easily add the limit of the torque applied to the treatment tool with a compact and simple mechanism. Another object of the present invention is to provide a hand torque driver which can be visually checked.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned object, and has as its gist a handpiece in which an arbitrary treatment tool in an implant operation is detachably attached to a distal end thereof. A torque limiter that is detachably attached to the rear end of the handpiece and that applies a predetermined torque to the treatment tool,
A hand torque driver comprising a manual torque controller driven to rotate manually, comprising: a handpiece; An annular member movably provided on the handpiece, and / or
Alternatively, an annular member provided so as to rotate together with the manual torque controller when the manual torque controller is rotationally driven and rotatably slidable in the circumferential direction, and a handpiece, a manual torque controller, and / or a mutually adjacent handpiece.
Or, a mark provided on each outer peripheral surface of the annular member is further provided. According to this aspect, by knowing in advance how much rotation of the manual torque controller causes the limit addition of the torque to occur, the feeling of weight generated when the manual torque controller is rotationally driven reduces the weight of the treatment tool. Considering that the torque is approaching the limit addition, the annular member is arranged such that the mark provided on the annular member and the mark provided on the opposing handpiece, manual torque controller, or other annular member match. By rotating the manual torque controller gradually after rotating and sliding, it is possible to visually check the relative movement amount of each mark, and the manual torque controller is turned around the maximum torque required by the treatment tool. The rotation drive can be stopped.
As described above, with the hand torque driver of the present invention, it is possible to easily visually check the addition of the limit of the torque applied to the treatment tool with a compact and simple mechanism.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the hand torque driver of the present invention, as described above, the annular member is formed in a circumferential direction on the outer periphery of the handpiece and the manual torque controller externally adjacent to the rear end of the handpiece. A handpiece rotatably slidably provided and / or provided on the manual controller so as to rotate with the manual torque controller when the manual torque controller is rotationally driven; And, as the mark provided on each outer peripheral surface of the annular member, a suitable mark such as a scale provided at a predetermined interval over the entire circumference or an arrow provided at a predetermined position can be adopted. In particular, when the scale is provided, a mode is adopted in which one scale indicates a movement amount from a timing at which a sense of weight is generated when the manual torque controller is rotationally driven, for example, until the torque applied to the treatment tool reaches a limit. Then, it is possible to easily visually check how much the rotational drive of the manual torque controller reaches the limit.

As the treatment tool in the implant operation, various drivers such as a friction drive wrench, a screw driver and a hex driver, as well as a tap and the like can be used, and an appropriate tool is used as the treatment tool. be able to.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

FIG. 1 is a schematic side view showing an embodiment of a hand torque driver according to the present invention, and FIG. 2 is a schematic plan view of FIG. FIG. 3A is a side view showing the head unit in FIG. 1 from the direction A, and FIG. 3B is a side view showing the manual torque controller in FIG. 1 from the direction B.

[0012] The hand torque driver 10 of the present invention comprises:
As shown in FIGS. 1 to 3, an arbitrary treatment tool in an implant operation, for example, a friction drive wrench 12 is opened and closed by a locking lever 11 b to operate the head 11 at the tip.
Angle handpiece 1 detachably attached to a
1 and a torque limiter (not shown) which is detachably attached to the rear end of the angle handpiece and applies a predetermined torque to the friction drive wrench 12 (not shown), and is manually driven to rotate. And a manual torque controller 13. Further, when the manual torque controller 13 is attached to the angle handpiece 11, the manual torque controller 13 is rotatable and slidable in the circumferential direction on the outer periphery of the manual torque controller 13 which is externally adjacent to the rear end of the angle handpiece 11. It further includes a scale ring 14 that rotates together with the manual torque controller 13 when the torque controller 13 is driven to rotate. A reference position indicator 15 (arrow) is provided on the outer peripheral surface of the adjacent angle handpiece 11. A scale 14 a is provided on the outer peripheral surface of the 14. Here, one graduation of the graduation ring 14 indicates a movement amount from a timing when a heavy feeling is generated at the time of the rotational driving of the manual torque controller 14 until the torque applied to the friction drive wrench 12 reaches the limit.
For example, when the scale 14a is moved by about 1/2, about 18
This indicates that a torque of N / cm is applied.

The head 11 of the angle handpiece 11
friction drive wrench 12 attached to a
Is rotated left and right by a rotational drive of a manual torque controller 13 attached to the rear end of the angle handpiece 11. In addition, the torque limiter causes the manual torque controller 13 to idle when the friction drive wrench 12 is applied with a predetermined value or more.

In the hand torque driver 10 according to the present invention, a reference position indicator 15 and a scale ring 14 are provided on the outer peripheral surfaces of the angle handpiece 11 and the manual torque controller 13 adjacent to each other. The scale 14a is used according to the procedure shown in FIGS. For example, when screwing an abutment (for example, a maximum allowable torque of 18 N / cm) to an implant body embedded in the jaw bone (not shown), first, a manual torque controller 13 (for example, a set torque of 20 N / cm) is rotationally driven. Thereby, the friction drive wrench 12 attached to the head portion 11a is fitted to the head of the abutment and rotated (FIG. 4A). Next, from the feeling of weight generated when the manual torque controller 13 is driven to rotate, it is understood that the torque to the friction drive wrench 12 has approached the limit addition, and any scale 14a provided on the scale ring 14 is provided.
Is rotated and slid so as to match the reference position display 15 provided on the angle handpiece 11 (FIG. 4).
(B)). And again, the manual torque controller 13
Is gradually rotated, the amount of movement of the scale 14a of the scale ring 14 from the reference position display 15 can be visually checked, and by suppressing the amount of movement of the scale 14a to about 1/2 movement, about 18 N / cm. It is possible to finish applying the torque of the order (FIG. 4C). As described above, in the hand torque driver 10 according to the present embodiment, it is possible to easily visually confirm the degree of the limit applied to the torque applied to the friction drive wrench 12.

[0015]

According to the hand torque driver of the present invention,
Handpiece,
And an annular member provided on the handpiece so as to be rotatable and slidable in the circumferential direction on the outer periphery of the manual torque controller which is externally adjacent to the rear end of the handpiece, and / or the manual torque controller when the manual torque controller is rotationally driven. An annular member that is provided so as to rotate together with and is slidable in the circumferential direction, and a handpiece, a manual torque controller, and / or a mark provided on each outer peripheral surface of the annular member. In addition, since it is provided as an aspect, by knowing in advance how much rotation of the manual torque controller causes the torque limit addition to occur, the feeling of weight generated at the time of rotation driving of the manual torque controller can be applied to the treatment tool. When the torque on the ring member approached the limit addition, Handpiece, manual torque controller, or other such mark and matches provided in the annular member, after rotating sliding annular member, by gradually rotating the manual torque controller again,
The relative movement amount of each mark can be visually checked, and the rotational drive of the manual torque controller can be stopped near the maximum torque required by the treatment tool. As described above, the hand torque driver of the present invention has a remarkable effect that the limit of the torque applied to the treatment tool can be easily visually checked with a compact and simple mechanism.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing an embodiment of a hand torque driver of the present invention.

FIG. 2 is a schematic plan view of FIG.

3A is a side view showing the head unit in FIG. 1 from a direction A, and FIG. 3B is a side view showing the manual torque controller in FIG. 1 from a direction B.

4 (a) to 4 (c) are state diagrams showing how to use the hand torque driver according to the present invention over time.

[Explanation of symbols]

 10 Hand torque driver according to the present invention 11 Angle handpiece 12 Friction drive wrench (treatment tool) 13 Manual torque controller 14 Scale ring (annular member, mark) 15 Reference position display (mark)

Claims (1)

(57) [Claims] 1. A handpiece in which an arbitrary treatment tool in an implant operation is detachably attached to a tip thereof.
A hand torque driver that is detachably attached to the rear end of the handpiece, has a torque limiter for applying a predetermined torque to the treatment tool, and has a manual torque controller that is manually driven to rotate. An annular member provided on the handpiece so as to be rotatable and slidable in a circumferential direction on an outer periphery of the handpiece and a manual torque controller that is externally adjacent to a rear end of the handpiece. To rotate with the manual torque controller at the time of rotation drive,
And an annular member provided to be rotatable and slidable in the circumferential direction;
A hand torque driver, further comprising: a handpiece adjacent to each other, a manual torque controller, and / or a mark provided on each outer peripheral surface of the annular member.