1. Introduction
The OHTO Minimo NBP-505MN-BK is a compact, oil-based retractable ballpoint pen designed for portability and convenience. Its slim profile allows it to be easily carried in a wallet or small organizer. This manual provides essential information for the proper setup, operation, and maintenance of your pen.
Figure 1: OHTO Minimo NBP-505MN-BK Ballpoint Pen.
2. Setup
2.1 Unboxing and Initial Inspection
Upon unboxing, ensure all components are present: the pen body, the refill, the spring, and the adapter. The pen also comes with a convenient holder (W60 mm x H91 mm) for portability, allowing it to be inserted into a business card case or notepad.
Figure 2: OHTO Minimo Pen with its included holder.
2.2 Refill Installation
The pen is typically shipped with the refill already installed. However, for initial inspection or future replacement, familiarize yourself with the internal components. The pen consists of the main body, a spring, an adapter, and the ink refill. Ensure the spring and adapter are correctly positioned when assembling the pen to allow for proper retraction.
Figure 3: Disassembled view of the OHTO Minimo pen, showing the refill, spring, and adapter.
3. Operating Instructions
3.1 Extending and Retracting the Pen
To extend the pen tip for writing, locate the small side button on the pen body. Press this button firmly. The pen tip will extend, and the mechanism will lock into place. To retract the pen tip, press the side button again. The tip will retract into the pen body, making it safe for carrying.
Figure 4: Diagram illustrating the side button activation for extending and retracting the pen tip.
3.2 Writing
The OHTO Minimo NBP-505MN-BK uses an improved oil-based ink that offers lower viscosity and smoother writing, producing crisp lines. The tip is a narrow needle point (0.5 mm) for precise writing. Hold the pen comfortably and apply light pressure to write.
Figure 5: Close-up view of the OHTO Minimo pen tip and clip.
4. Maintenance
4.1 Refill Replacement
When the ink runs out, replace the refill with an OHTO R-4C5NP Black (0.5 mm) refill. Other brands or models of refills may not fit or function correctly with this pen. To replace, carefully unscrew the pen body, remove the old refill, and insert the new one, ensuring the spring and adapter are correctly positioned before reassembling.
4.2 General Care
To ensure the longevity of your pen, avoid dropping it or exposing it to extreme temperatures. Be careful not to lose the internal spring or the adapter attached to the top of the core, as these are essential for the pen's retraction mechanism to function.
5. Troubleshooting
5.1 Pen Not Retracting or Extending
If the pen tip does not retract or extend properly when the side button is pressed, check the internal components. The most common cause is a misplaced or lost spring or adapter. Disassemble the pen carefully and ensure both the spring and the adapter are correctly seated with the refill before reassembling.
6. Specifications
- Model Number: NBP-505MN-BK
- Type: Retractable Oil-based Ballpoint Pen
- Ink Color: Black
- Point Type: Extra Fine
- Line Size: 0.25 mm (0.02 inches)
- Ball Diameter: 0.5 mm (0.02 inches)
- Dimensions: Total length 91 mm (3.58 inches) x Shaft diameter 3.7 mm (0.1 inches) x Maximum diameter 5.2 mm (0.2 inches)
- Weight: 3.1 g (0.141 ounces)
- Material: Shaft: Aluminum, Ferrule, Knock: Brass, Clip: SK material, Holder: Polypropylene
- Country of Origin: Japan
- Compatible Refill: OHTO R-4C5NP Black (0.5 mm)
7. Warranty Information
No specific warranty information is provided with this product. Please refer to the retailer's return policy or contact OHTO directly for any warranty-related inquiries.
8. Support
For further assistance or product support, please contact the retailer where the OHTO Minimo NBP-505MN-BK Ballpoint Pen was purchased. Specific manufacturer contact information is not provided in this manual.