JP2000245743A - Blade of medical knife - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blade hardly deflecting and superior in the flexural rigidity by applying the specific reinforcement means to the blade. SOLUTION: A knife-edge 11 is extended between the edges of the side surfaces 9 at both sides in the thickness direction A of a blade body 6. A reinforcement part 13 swelled in the thickness direction by the plastic working is integrally formed on one side surface 9. The swelled reinforcement part 13 comprises a projecting surface 13a welled at one of the side surfaces 9 side, and a recessed surface 13b corresponding to the convex surface 13a at the other side surface 9 side. The swelled reinforcement part 13 is integrally formed along a back edge 12 in the neighborhood of the back edge 12 at a side opposite to the knife-edge 11, and in the neighborhood of a holder support hole 10 formed between both side surfaces 9 of the blade body 6. Whereby the blade body is totally hardly bent and its flexural rigidity can be improved by the function of the swelled reinforcement part 13. The cutting by the knife-edge 11 can be smoothly performed regardless of the formation of the projecting surface 13a of the swelled reinforcement part 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical knife blade.

[0002]

2. Description of the Related Art Conventionally, for example, in a medical scalpel disclosed in Japanese Utility Model Laid-Open No. 4-136221, a holder mounting portion of a blade is mounted on a blade mounting portion of a holder, and the blade mounting portion is mounted in a holder supporting hole of the holder mounting portion. When the holder supporting hole and the fitting projection are engaged with each other by fitting the fitting projection of the holder, the blade body is attached to and detached from the holder with the blade part of the blade body protruding from the blade mounting part of the holder. Supported as possible.

[0003]

Since the thickness of the blade is functionally thin, the entire blade is easily bent, which may hinder the cutting operation by the blade.

SUMMARY OF THE INVENTION An object of the present invention is to provide a specific reinforcing means to a blade body so that the entire blade body is hardly bent and its bending rigidity is increased.

[0005]

The present invention will be described with reference to the reference numerals of the drawings (FIGS. 1 to 4) of the respective embodiments described later. The medical knife according to the first aspect of the present invention is configured as follows.

A blade edge (11) extends between the edges of the side surface (9) on both sides of the blade body (6) in the thickness direction (A). A reinforcing portion (13) swelled in the thickness direction (A) by plastic working is integrally formed on at least one of the side surface portions (9). The bulging reinforcing portion (13) has a convex surface (13a) that bulges on one side surface (9) side of the side surface portions (9) of the blade body (6) and a convex surface (13a) on the other side surface portion (9) side. (13a) and a concave surface (13b) corresponding to (13a).

According to the second aspect of the present invention, the reinforcing portion (13) according to the first aspect of the present invention is integrally formed in the vicinity of a back edge (12) on the opposite side of the cutting edge (11). The blade of the medical knife according to the invention of claim 3 is configured as follows.

A cutting edge (11) extends between the edges of the side surface (9) on both sides in the thickness direction (A) of the blade (6). The back edge (1) on the opposite side of the blade edge (11)
2) is bent by plastic working to at least one of the side surfaces (9) of the two side surfaces (9) to protrude the reinforcing portion (14).

According to a fourth aspect of the present invention, there is provided the reinforcing portion according to the first or second or third aspect.
14) is integrally formed in the vicinity of the holder support hole (10) penetrated between both side portions (9) of the blade body (6).

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment First, a medical knife and its blade according to a first embodiment of the present invention will be described with reference to FIGS.

<Outline of Medical Scalpel 1 shown in FIG. 1> The medical scalpel 1 includes a holder 2 and a blade 3. The holder 2 has a blade mounting portion 4. A fitting projection 5 is formed on the blade mounting portion 4.

As shown in FIG. 2, the blade 6 of the blade 3 has a holder mounting portion 7 and a blade portion 8 integrally extended from the holder mounting portion 7. In the holder mounting portion 7, a holder support hole 10 penetrated between the side surface portions 9 on both sides in the thickness direction A of the blade body 6 is formed. In the blade portion 8, a blade edge portion 11 extends between the edges of the side surface portions 9 on both sides in the thickness direction A of the blade body 6. The blade body 6 has a back edge portion 1 on the opposite side of the blade edge portion 11.
Two.

The holder mounting portion 7 of the blade body 6 is placed on the blade mounting portion 4 of the holder 2, and the fitting projection 5 of the blade mounting portion 4 is fitted into the holder support hole 10 of the holder mounting portion 7. When the holder supporting hole 10 and the fitting projection 5 are locked to each other, as shown in FIG. 1, the blade body 8 projects from the blade mounting part 4 of the holder 2 while the blade 3 is 2 is detachably supported. After use, the blade 3 can be removed from the holder 2 and replaced.

<Improved points of the blade 3> FIGS. 2 (a) and 2 (b)
As shown in FIG. 1, the back edge 12 and the holder support hole 10 are located on one of the side surfaces 9 of the side surfaces 9 of the blade portion 8.
, An elongated reinforcing portion 13 is integrally formed along the back edge portion 12 by plastic working. The reinforcing portion 13 bulges in the thickness direction A, and bulges on one side surface 9 side of the side surface portions 9 of the blade body 6, and a peripheral portion corresponding to the convex surface 13 a on the other side surface 9 side. And a concave surface 13b surrounded by. Therefore, the thickness TB of the blade 6 including the swelling reinforcement 13 is set to be larger than the thickness TS of the blade 6 not including the swelling reinforcement 13 by the thickness W of the swelling reinforcement 13. Is done.

In this case, "along the back edge 12"
It is not limited to the meaning "parallel to the back edge 12",
"Longitudinal direction B of blade body 6 between back edge 12 and blade edge 11
It should be interpreted in a broad sense of "extend to" and not necessarily in the vicinity of the back edge portion 12. Further, the “longitudinal direction B” is not limited to one predetermined direction, but is interpreted in a broad sense, and the back edge 12 and the blade edge 11
Are used to distinguish the width direction C from the width direction C.

<Characteristics of First Embodiment> The first embodiment has the following characteristics (except for other technical ideas described below). * A specific bulging reinforcing portion 13 was integrally formed on the side surface portion 9 of the blade body 6. The function of the bulging reinforcing portion 13 makes it difficult for the entire blade body 6 to bend, thereby increasing its bending rigidity.

* In the blade body 6, the back edge portion 12 is on the opposite side of the blade edge portion 11 and is separated from the blade edge portion 11.
The bulging reinforcing portion 13 is formed integrally with the side surface portion 9 near the back edge portion 12. For this reason, the convex surface 13a of the bulging reinforcing portion 13 does not hinder the cutting operation by the cutting edge portion 11, and the cutting operation can be performed smoothly.

* In the blade body 6, the vicinity of the holder support hole 10 is one of the easily bent portions. Swelling reinforcement part 1
Numeral 3 is integrally formed on the side surface 9 near the holder supporting hole 10. Therefore, the entire blade body 6 is more difficult to bend, and its bending rigidity can be increased.

* The blade body 6 is most easily bent in the thickness direction A with the center in the width direction C perpendicular to the longitudinal direction B. The bulging reinforcing portion 13 is integrally formed along the back edge portion 12. Therefore, the entire blade body 6 is more difficult to bend, and its bending rigidity can be increased.

[Second Embodiment] In a second embodiment shown in FIGS. 3A and 3B, a plurality of bulging reinforcing portions 13 are integrally formed on both side surfaces 9 of the blade body 6 in a groove shape. They are arranged in parallel in the width direction C in parallel with each other, extend in the longitudinal direction B, and are opened at the back edge portion 12. Among the two side surfaces 9, one of the side surfaces 9 has a concave surface of the bulging reinforcing portion 13 of the other side 9 between the convex surfaces 13a of the bulging reinforcing portions 13 adjacent to each other. 13b smoothly continues to the two convex surfaces 13a, and the convex surfaces 13a and the concave surfaces 13b are formed alternately. In addition, in the other side surface portion 9 of the both side surface portions 9, the swelling reinforcing portion 13 of one side surface portion 9 between the convex surfaces 13 a of the bulging reinforcing portions 13 adjacent to each other on the other side surface portion 9. Is smoothly continuous with the two convex surfaces 13a, and the convex surfaces 13a and the concave surfaces 13b are formed alternately. The height of each convex surface 13a is the same as each other, and each concave surface 13b
Have the same depth. For others,
This is the same as the first embodiment.

[Third Embodiment and Another Example] FIG. 4 (a)
In the third embodiment shown in FIG. 4 and another example of the third embodiment shown in FIG. 4B, the back edge portion 12 is bent toward one of the side surface portions 9 by the plastic working. The reinforcing portion 14 is provided so as to protrude. Others are the same as in the first embodiment.

[Other Embodiments] In addition to the above embodiments, the following configuration may be adopted. * In the first embodiment, the shape and attachment position of the swelling reinforcing portion 13 are changed. For example, if the back edge portion 12 is curved, the bulging reinforcing portion 13 is also curved in accordance with the back edge portion 12.

The present invention is applied to a medical scalpel 1 in which a blade 3 is integrated with a holder 2. [Other technical ideas] The technical ideas (other than the claims) that can be grasped from the above embodiments will be described.

(A) In the first aspect, the blade body 6 has a holder mounting portion 7 having a holder supporting hole 10 penetrated between both side surface portions 9, and a blade integrally extending from the holder mounting portion 7. A cutting edge portion 11 is formed on the cutting edge portion 8, and the cutting edge portion 8 is a back edge portion 12 on the opposite side of the cutting edge portion 11.
And the bulging reinforcing portion 13 is integrally formed with the blade portion 8 in the vicinity of the back edge portion 12. Therefore, the swelling reinforcing portion 13
Despite the formation of the convex surface 13a, the cutting by the blade edge portion 11 can be performed smoothly.

(B) In the first aspect, the blade body 6 has a holder mounting portion 7 having a holder supporting hole 10 penetrated between both side portions 9, and a blade integrally extending from the holder mounting portion 7. The blade tip portion 11 is formed on the blade portion 8, and the bulging reinforcing portion 13 is integrally formed with the blade portion 8 near the holder support hole 10. Therefore, the bending rigidity can be increased by making the entire blade body 6 more difficult to bend.

(C) An invention in which the above (a) and (b) are combined. (D) In claim 1, a plurality of bulging reinforcing portions 13 are integrally formed on both side surface portions 9 of the blade body 6 and are provided side by side, and in one side surface portion 9 of the both side surface portions 9,
The concave surface 13b of the bulging reinforcing portion 13 of the other side surface portion 9 between the convex surfaces 13a of the bulging reinforcing portions 13 adjacent to each other on one side surface portion 9 is connected to the biconvex surface 13a.
a and the concave surface 13b are formed alternately, and in the other side surface portion 9 of the both side surface portions 9, one of the side surface portions 9 between the convex surfaces 13a of the two bulging reinforcing portions 13 adjacent to each other. The concave surface 13b of the bulging reinforcing portion 13 of the side surface portion 9 is
The convex surfaces 13a and the concave surfaces 13b were alternately formed on the surface 3a. Therefore, the bending rigidity can be increased by making the entire blade body 6 more difficult to bend.

[0027]

According to the blade (3) of the medical scalpel (1) according to the first aspect of the present invention, the function of the swelling reinforcing portion (13) makes the entire blade body (6) hard to bend, so that the blade (6) is hardly bent. Flexural rigidity can be increased.

According to the second aspect of the invention, in addition to the effects of the first aspect, the cutting by the cutting edge portion (11) is smoothly performed despite the formation of the convex surface (13a) of the bulging reinforcing portion (13). Can be done.

The medical scalpel according to the third aspect of the present invention (1)
According to the blade (3), the function of the bending reinforcing portion (14) makes the entire blade body (6) hard to bend, thereby increasing its bending rigidity, and is also used for forming the bending reinforcing portion (14). Regardless, cutting by the cutting edge (11) can be performed smoothly.

According to the fourth aspect of the present invention, in addition to the effects of the first, second, or third aspect, the entire blade body (6) is more difficult to bend and its bending rigidity is increased. it can.

[Brief description of the drawings]

FIG. 1 is a partial perspective view showing a medical scalpel according to a first embodiment.

FIG. 2A is a front view showing a blade of the medical knife, and FIG. 2B is a partial cross-sectional view showing a reinforcing portion of the blade.

FIG. 3A is a front view showing a blade in a second embodiment, and FIG. 3B is a partial cross-sectional view showing a reinforcing portion of the blade.

FIG. 4A is a partial cross-sectional view showing a reinforcing portion of a blade in a third embodiment, and FIG. 4B is a partial cross-sectional view showing a reinforcing portion of a blade in another example of the third embodiment.

[Explanation of symbols]

Reference numeral 6: blade body, 9: side surface portion, 10: holder support hole, 11: blade edge portion, 12: back edge portion, 13: reinforcing portion, 13a: convex surface, 1
3b: concave surface, 14: reinforcing portion, A: thickness direction.

Claims (4)

[Claims] 1. A blade edge portion is extended between the edges of side portions on both sides in a thickness direction of a blade body, and at least one side portion of the both side portions is expanded in a thickness direction by plastic working. The protruding reinforcing portion is integrally formed, and the bulging reinforcing portion has a convex surface that swells on one side surface side of both side surface portions of the blade body, and a concave surface corresponding to the convex surface on the other side surface portion side. A scalpel blade for medical use. 2. The blade for a medical scalpel according to claim 1, wherein the reinforcing portion is integrally formed near a back edge portion on the opposite side of the blade edge portion. 3. A blade edge portion is extended between the edges of the side surface portions on both sides in the thickness direction of the blade body, and a back edge portion on the opposite side of the blade edge portion is attached to at least one of the side surface portions. A medical knife blade characterized in that a reinforcing portion is protruded from the side by bending by plastic working. 4. The blade body according to claim 1, wherein the blade body has a holder support hole penetrated between both side portions, and the reinforcing portion is integrally formed near the holder support hole. A medical knife according to claim 2 or claim 3.