Mitaka Kohki Co., Ltd.

Mitsubishi Pencil Company, Limited

Yusuke Nakata

Masao Doi

Tatsuya Hashimoto

Hisato Haga

A writing instrument may be capable of preventing dye deposition to a pen core and highly achieving both inhibition of ink discoloration due to the dye deposition and improved writing feeling without reducing writing performance. Such a writing instrument may be equipped with a pen core and loaded with a water-based ink composition, wherein the water-based ink composition contains colored resin particles formed by polymerization of a monomer comprising at least cyclohexyl (meth)acrylate, enclosing a basic dye, an oil-soluble dye or an acid dye, and further contains an anionic surfactant.

Writing instrument

A surgical microscope system includes a surgical microscope. When an additional unit is added to the microscope, the center of gravity of the microscope upwardly changes. In this case, an extension of a vertical-slider plate is joined with an upper joint location of a horizontal-slider plate, to raise a vertical slider together with a rotary shaft relative to the microscope, so that a weight balance of the microscope can be established only by sliding the vertical slider within its slidable range.

Surgical microscope system having horizontal and vertical sliders

At a front end of the lateral arm of a surgical microscope apparatus, the apparatus has an intake port. A band is tied around the front end of the lateral arm so that a drape is drawn only to a surgical microscope. Drawing the drape to the surgical microscope results in clearing the field of vision of a surgeon. Part of the drape around the lateral arm and a longitudinal arm is not drawn, to cause no hindrance in operability of the surgical microscope. The lateral arm and the like are hollow to form an inner ventilating path without separately preparing ventilating tubes or the like for ventilation.

Surgical microscope apparatus and sealed drape

An automatic balancing structure of a medical balancing stand has stoppers arranged on a turn plate. In a normal state, the stoppers are in contact with and hold a contact part of a lever so that the lever and turn plate follow a rotative motion of a lateral arm. If the lateral arm causes an imbalance, a strain occurs on the lever to which a strain sensor is attached. The strain sensor detects the strain and outputs a signal to an adjustment unit so as to cancel the imbalance of the lateral arm. The strain sensor helps downsizing the automatic balancing structure and making the balance adjustment easier.

Automatic balancing structure of medical balancing stand

A base anchoring structure fixes a baseof an apparatus bodyto a floor F in position. The base is at a lower part of the apparatus body and has casters C to move the apparatus body along the floor. The base anchoring structure includes linear actuatorsfixed to the base, to downwardly bias, with a uniform pressure provided by air A supplied to the linear actuators, their respective pistonsuntil lower ends of the pistons reach the floor and stopper units () to engage with the downwardly pushed pistons and stably maintain the downwardly pushed state of the pistons. The engagement of the stopper units with the pistons stably maintains the anchored state of the base. The plurality of actuator is easily operated only by supplying air thereto.

Growing community of inventors

Tokyo, Japan

Yusuke Nakata