JP3014356U - Diamond knife for ultra microtome - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a diamond knife for an ultramicrotome having a structure in which the fixing strength to a tool is not reduced and the knife does not deform or vibrate during use. [Structure] In an ultramicrotome diamond knife 1 comprising a blade portion 3 having a diamond cutting edge 2 and a support body 4 for fixing it, a material 7 having a higher rigidity than a material 6 above the support body 4 is provided below the support body 4. A diamond knife for an ultramicrotome in which the holding strength of the support 4 is increased by inserting or joining to reduce the vibration of the cutting edge during cutting.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a diamond knife for an ultra microtome used when preparing an ultrathin section sample for electron microscope observation.

[0002]

[Prior art]

 FIG. 5 shows a conventional diamond knife 21 for an ultramicrotome, which comprises a blade portion 23 having a diamond cutting edge 22 and an aluminum support 24 having the blade portion 23 fixed with screws 25 or a screw. In use, the lower part of the support 24 is fixed to a vise tool, and the sample is cut into thin slices with a diamond cutting edge 22 using a cutting device (microtome) for preparing thin slice samples.

[0003]

[Problems to be solved by the device]

 By the way, when these diamond knives for ultramicrotome are used in a low temperature atmosphere at the time of cryo, the fixing strength of the knife may be weakened due to the difference in thermal expansion between the knife and the vise tool fixing the knife.

When the rigidity of the knife support is weak, the knife support may be deformed or flexurally vibrated by the cutting load during cutting, causing the knife edge to vibrate with respect to the sample to be cut. May not be able to perform good cutting.

The present invention solves the above problems and provides a diamond knife for an ultramicrotome having a structure in which the fixing strength to a tool is not lowered and the knife is not deformed or vibrated during use. This is an issue.

[0006]

[Means for Solving the Problems]

 The present invention is a knife having a structure in which cutting performance is improved by using an improved material for a supporting part in a support portion of a diamond knife.

That is, the first invention is to increase the holding strength of the support by inserting or joining a material having a higher rigidity than the material of the upper part of the support to the lower part of the support of the diamond knife to increase the cutting edge vibration during cutting. It is a diamond knife for ultra microtome that reduces

A second invention is a diamond knife for an ultramicrotome, in which a low thermal expansion alloy is bonded to a lower portion of a support body of a diamond knife to prevent the support body from loosening during cutting in a low temperature atmosphere. Is.

Further, the third invention has a structure for suppressing the mechanical vibration of the cutting device from being transmitted to the cutting edge of the knife by inserting or joining a damping material in the lower part of the support of the diamond knife. It is a diamond knife for ultra microtome.

[0010]

【Example】

 FIG. 1 shows an embodiment of the present invention. A diamond knife 1 for an ultramicrotome is composed of a blade portion 3 having a diamond cutting edge 2 and a support body 4, and the blade portion 3 has a support body 4 and a screw 5 attached thereto. It is fixed by brazing. The upper portion of the support 4 is made of an aluminum material 6, and the stainless material 7 is joined to the lower portion of the support 4 fixed by a vice jig.

The stainless steel material 7 has higher rigidity than the aluminum material 6 forming the upper part of the support body 4, the holding strength by the vise jig becomes strong, and the problem of vibration of the cutting edge 2 does not occur during cutting.

Further, since the stainless steel material 7 is a material having a lower thermal expansion coefficient than the aluminum material 6 and the tightening strength of the vice jig does not change due to the temperature change during use, the stainless steel material 7 can be attached even when used at low temperature during crying. Slack does not occur.

FIG. 2 shows another embodiment, in which the diamond knife 8 uses a vibration damping material 9 composed of a vibration damping structure material from the blade portion 3 to the vise attachment portion, thereby cutting the cutting edge. It has a structure that damps the vibration of 2 and suppresses the transmission of the motor vibration of the cutting power part of the microtome. The damping material 9 may be, for example, damping cast iron or laminated steel plate.

3 and 4 show another shape of the diamond knife of the present invention. The diamond knife 10 of FIG. 3 is used at room temperature and wet, and the diamond knife 11 of FIG. 4 is used at dry state. The upper portion of the support 4 is made of aluminum material 6, and the lower portion is made of stainless material 7.

[0015]

[Effect of device]

 As described above, according to the present invention, it is possible to suppress looseness and vibration of the mounting of the knife support during use, the tip of the knife does not vibrate with respect to the sample to be cut, and it is possible to improve the accuracy of cutting. Not only biological samples embedded in materials but also difficult to cut inorganic electronic materials and highly hard and brittle materials that have been difficult in the past. For example, it exhibited a good effect in cutting silicon-dispersed aluminum alloy and fibrous silicon nitride single crystal.

[Brief description of drawings]

FIG. 1 is a front view and a side view showing an example of a diamond knife of the present invention.

FIG. 2 is a front view and a side view showing another example of the diamond knife of the present invention.

FIG. 3 is a front view and a side view showing another shape of the diamond knife of the present invention.

FIG. 4 is a front view and a side view showing another shape of the diamond knife of the present invention.

FIG. 5 is a front view and a side view showing a conventional diamond knife.

[Explanation of symbols]

 1,8,10,11,21 Diamond knife 2,12 Diamond blade edge 3,13 Blade portion 4,14 Support body 5,15 Screw 6 Aluminum material 7 Stainless steel material 9 Damping metal

Claims (3)

[Scope of utility model registration request] 1. In a diamond knife for an ultramicrotome, which comprises a blade having a diamond cutting edge and a support for fixing the cutting edge, a material having higher rigidity than the material of the upper part of the support is inserted or joined to the lower part of the support. Thus, the diamond knife for an ultramicrotome is characterized by increasing the holding strength of the support to reduce the vibration of the cutting edge during cutting. 2. A diamond knife for an ultramicrotome, comprising a blade having a diamond cutting edge and a support for fixing the cutting edge, wherein a low thermal expansion alloy is bonded to the lower part of the support to support it during cutting in a low temperature atmosphere. A diamond knife for an ultramicrotome, characterized by preventing the body from being loosened. 3. In a diamond knife for an ultramicrotome, which comprises a blade having a diamond cutting edge and a support for fixing the cutting edge, a vibration damping material is inserted into or bonded to a lower portion of the support to cause mechanical vibration of a cutting device. A diamond knife for an ultramicrotome, which has a structure that suppresses the transmission of the to the cutting edge of the knife.