3D wooden puzzle round secret box, diaphragm lid - IRIS
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Laser-cut wood Diaphragm lid Round as a lens, delicate as a stained-glass window, IRIS is a wooden secret box that intrigues even before it is opened. This 3D puzzle, when assembled, forms a cylindrical box 10 cm in diameter and 6 cm high, topped with a diaphragm lid: slats arranged in a spiral, like those of a camera lens, form a rosette in the center before sliding apart to reveal the inside. Around it, a ring engraved with letters and symbols seems to control the opening, much like a circular cryptex. Its vertical-slat walls are engraved with scrolls. All pieces are cut from laser-cut light plywood and are assembled via interlocking joints. The manufacturer recommends it for adults and teenagers aged 14 and up. Smaller and more graphic than the chests in the same series, IRIS fits perfectly on a bedside table, an entry console, or a desk, where it can hold a ring, cufflinks, or a few rolled-up banknotes. It is the perfect object for those who love geometric shapes, rotating mechanisms, and puzzles that are solved with a touch, never by force.
The model offered
The iris diaphragm: an optician's idea
The iris diaphragm is a device consisting of thin blades that all pivot together around the same circle. By turning a ring, each blade is slid toward the center or outward: the opening narrows or widens while remaining roughly round. Camera lens manufacturers adopted it in the late 19th century to regulate light; it is still used to adjust the aperture on many cameras today. Its charm lies in this spiral, almost organic movement that evokes the pupil of an eye, which gave it its name.
On IRIS, the lid adopts this wooden architecture. A detail photo confirms it: the blades do indeed move apart to open the diaphragm, like those of a camera lens. However, the exact role of the ring engraved with symbols is not described by the supplier: we therefore do not present it as a code. What the photos show is a perfectly regular rosette of blades and a crown engraved with letters and signs, two elements that make the box an object to be observed as much as handled. Laser cutting is precisely what allows for these thin blades and sharp engravings.
What makes IRIS so unique
The circle, the spiral, and the secret
Round objects have always had something precious about them: apothecary pill boxes, snuffboxes, powder compacts, lockets. IRIS follows in this intimate tradition—containers kept close at hand that one opens with a ritual gesture.
Here, the gesture is paired with mystery. The eye follows the blades turning toward the center, seeks the meaning of the engraved ring, and hesitates between letters and symbols. You don't immediately know how the box is meant to be opened, until the blades slide apart in a spiral: this is precisely what makes it endearing. Once assembled, it becomes a little wooden rebus sitting on a piece of furniture, an object that poses a question to anyone who picks it up.
There is also the beauty of the assembly itself. Placing the blades one by one, watching the spiral gradually emerge, then closing the crown around it: it is a miniature watchmaker's task, slow and soothing. When the last piece finds its place, the box no longer resembles a sheet of plywood but a small workshop object, precise and lively, that you truly want to keep.
Assembling IRIS step by step
IRIS or a chest from the same series?
| Criteria | IRIS secret box | Combination safe (same series) | Treasure chest (same series) |
|---|---|---|---|
| Shape | Low cylinder, round lid | Cube with front door | Chest on curved feet |
| Signature element | Diaphragm-style slat lid | Three numbered dials and central knob | Carved openwork lid, decorative lock |
| Riddle | Opening diaphragm; symbol ring (code role not confirmed) | Three-dial code, then central knob | Lid, drawer, and pivoting side compartments |
| Visual footprint | The most discreet in the series | Compact but solid | The most decorative |
| Ideal use | Jewelry, ring, small souvenir | Key, USB drive, banknotes | Jewelry, small treasures, letters |
| Dimensions | Ø 10 × 6 cm | 12 × 12 × 12 cm | 15.4 × 11 × 8.7 cm |
All these secret model kits can be found in our selection of puzzles and office objects.
Good to know: supplier photos indicate a diameter of 10 cm and 6 cm in height, and a detail photo shows the diaphragm open. An instruction manual accompanies the assembly; the number of pieces and assembly time are not specified. The exact role of the engraved ring is not described: it could be a code or a decoration; we present it as it appears in the photos, without speculation.
Tip: curved plywood pieces are easier to shape if handled in a room with moderate temperature, never cold or too dry. Once the box is assembled, a grazing light placed beside it beautifully reveals the pattern of the blades and the ring's engraving.
Technical specifications
| Model | IRIS round secret box |
| Type | 3D wooden assembly puzzle |
| Shape | Cylindrical box, vertical-slat walls engraved with scrolls |
| Lid | Diaphragm with opening blades |
| Decor | Ring engraved with letters and symbols |
| Material | Light plywood |
| Process | Laser cutting and engraving |
| Assembly | Interlocking, with manual (no glue visible on the assembled model) |
| Recommended age | 14 and up (manufacturer's indication) |
| Compliance | CE marking (manufacturer's indication) |
| Dimensions (assembled) | Ø 10 cm × 6 cm high |
| Number of pieces / assembly time | Not provided |
Precautions: the blades and small parts in this kit present a choking hazard: not suitable for children under 3 years old; the manufacturer's recommended age is 14 and up.
Keep away from fire and heat sources: the plywood is flammable. Do not force the lid or the ring, as the thin elements may break.
A case to give… with something inside
IRIS is a beautiful idea for Valentine's Day, a birthday, or a slightly theatrical proposal: slip a ring, a card, or a concert ticket inside, and let curiosity do the rest. It also appeals to photography enthusiasts, who will appreciate the diaphragm reference.
To create a collection, browse our decoration and scientific objects from the Labo, which share the same taste for elegant mechanisms.
Frequently Asked Questions
How does the IRIS box open?
Via its diaphragm lid: a detail photo shows the blades pulled apart, revealing a round opening in the center, exactly like a camera lens. Surrounding it is a ring engraved with letters and symbols framing the rosette. The supplier does not specify if this ring acts as a combination lock; therefore, we cannot promise it. What is certain is that the object is operated by rotation and should never be forced. Once the box is assembled, take the time to gently explore the possible movements: discovery is part of the pleasure.
What is the size of the box?
According to supplier photos, IRIS measures approximately 10 cm in diameter and 6 cm high once assembled. Internal capacity is not specified: wall thickness and the lid mechanism reduce the usable space. This is clearly a small box to keep close at hand, designed for tiny objects: jewelry, wedding rings, cufflinks, a small key, a rolled-up note, or a folded message. If you have a specific object in mind, be cautious. IRIS is primarily a decorative and playful model, not a large storage unit.
Is assembly difficult?
IRIS is a model intended for ages 14 and up. Its difficulty lies mainly in the slat lid: these pieces are thin, numerous, and must be placed in the correct order for the rosette to form properly. The cylindrical body also requires a bit of delicacy, as the wood must accommodate a curve. With a methodical approach, a bowl for the small pieces, and a well-lit workspace, the assembly remains accessible to a patient beginner. An instruction manual guides the process; the number of pieces and time required are not specified by the manufacturer.
Do the letters on the ring have meaning?
The ring features a crown of laser-engraved letters and symbols. The supplier does not provide their meaning, and we do not wish to assign a significance that isn't intended. Visually, this crown evokes cryptexes and ancient encryption disks, which reinforces the puzzle spirit of the box. Nothing prevents you from making a game of it: choose a sequence of symbols as an imaginary password, invent a riddle for the person you are gifting it to, or simply appreciate the regularity of the engraving framing the blade rosette.
Is glue required?
The pieces are designed for interlocking assembly, and the photos of the finished model show no glue. For IRIS, this is especially important since the lid contains moving parts: a drop of glue on a blade or the crown would seize the entire movement. If a fixed joint on the cylindrical body feels too loose, a tiny dot of wood glue might be considered, provided it is kept away from moving parts. When in doubt, refrain: a well-seated interlock generally holds very well.
Can it be stained or varnished?
Yes, the raw plywood can be easily stained, oiled, or waxed. For a slat box, however, we recommend treating the pieces before assembly, with a very thin layer, and letting them dry completely: a thick finish increases friction between the blades and may jam the lid. A dark stain will make the rosette stand out against a lighter background if you only stain the body; conversely, a colorless wax will preserve the natural appearance while protecting the wood from fingerprints. Always test your product on a scrap piece first.
Is IRIS suitable as a wedding proposal case?
It is a lovely idea. Its round shape, its blade rosette, and its engraved ring make it an original case, far more memorable than a classic ring box. Just check, once the box is assembled, that the ring fits comfortably, as the box is only 6 cm high by 10 cm in diameter, and the exact interior space is not specified. Remember to test the opening several times in advance: on the big day, the movement should be fluid and without hesitation. And if you prefer a surprise effect, you can hand over the closed box and let the other person figure out how to open it.
