DE102023001638B4 - Device for opening a durian fruit and method - Google Patents

Abstract

A device (10) for opening a durian fruit (100), wherein the device (10) comprises: - a splitting body (5) which serves to penetrate into a durian fruit (100) and thereby split and/or break open the durian fruit (100), - an insertion tip (1) located at the front in a longitudinal direction (h) of the splitting body (5) for piercing into or at least for applying to a durian fruit (100) to be opened, wherein the splitting body (5) has a splitting surface (5a) for splitting and/or breaking open a durian fruit (100), wherein the splitting surface (5a) is an outer surface and/or peripheral surface of the splitting body (5), and wherein the splitting surface (5a) has a thread (6) or other screw profile, whereby the device (10) and/or the splitting body (5) for opening a durian fruit (100) can be turned and/or screwed into the durian fruit (100).

Description

The application relates to a device for opening a durian fruit and a method for opening a durian fruit.

DE 298 19 762 U1 shows a device for scooping out potatoes or other soft-skinned fruits or vegetables. The device has an insertion tip and a thread, with the thread surrounding a rod-shaped holder of constant diameter. The thread also has a constant diameter.

EP 0 607 948 A1 shows a device for holding mangoes or other soft-skinned fruits while these fruits are being peeled, i.e., freed from their soft skin, with another tool. The device for holding the mangoes has an insertion tip and a thread, which can be screwed into a mango to subsequently hold it during peeling.

DE 77 02 303 U shows a device for opening walnuts or hazelnuts, which are placed in a press container and crushed by a piston rod. The piston rod is preloaded in a tube by a spring; when the spring is released, the piston rod's impact energy breaks open the nuts' shells.

In many countries with warmer but not too dry climates, the durian fruit, also known as the "stinky fruit," is popular as a food; it is offered, processed, and consumed in restaurants, for example.

The popular durian fruit could actually be prepared and sold in the same way at markets or smaller street stalls. However, the durian fruit is usually only processed in larger restaurant kitchens. This is due to a disadvantageous characteristic of the durian fruit, which can currently only be addressed with considerable technical effort: its very hard shell. Even a strong adult will usually not be able to crack open the shell of a durian fruit with their bare hands or with simple tools, as the force required is roughly equivalent to that needed to lift a weight of approximately 30 to 40 kg.

CN 2 18 593 038 U shows a tool for opening durian fruits, which has a handle, a hammer that can be moved relative to the handle, and a blade mounted axially on the handle for opening durian fruits. The impact energy transferred by the hammer to the blade drives the blade into the skin of a durian fruit, breaking it open.

CN 2 17 986 598 U shows a device for opening a durian fruit using a blade and two rods. The two rods are pressed into the shell of a durian fruit with their respective insertion tips at two different points than the blade.

CN 1 09 077 631 A shows a device for opening a durian fruit using two blades, each with several teeth. Both blades are pressed into the skin of a durian fruit directly next to each other and then pushed away from each other sideways to break open the durian fruit.

• Thien-Ngon Dang and Huy-Bich Nguyen: „A Study on Durian Processing Technology and Defleshing Machine“, Asia Pacific Journal of Sustainable Agriculture Food and Energy (APJSAFE), Journal online http://journal.bakrie.ac.id/index.php/APJSAFE, ISSN: 2338-1345 - Vol. 3 (1) 12-16 .

Because of the hard shell, a larger device is used to open durian fruits, which utilizes leverage to open the fruit. This device is known from the following publication:

• Thien-Ngon Dang and Huy-Bich Nguyen: “A Study on Durian Processing Technology and Defleshing Machine”, Asia Pacific Journal of Sustainable Agriculture Food and Energy (APJSAFE), Journal online http://journal.bakrie.ac.id/index.php/APJSAFE, ISSN: 2338-1345 - Vol. 3 (1) 12-16 .

Such a conventional device, which is referred to in this application as a “lever system”, has a base or receptacle for placing a durian fruit and above it a lowerable, tapered wedge which serves as a splitting body for splitting and breaking open the durian fruit.

Even this pointed wedge could not be pushed into the durian fruit by hand because its skin is so hard. In the lever system, however, the wedge is guided by a lever mechanism so that a manually operated, e.g., depressible lever pushes the wedge into the durian fruit. This takes advantage of the law of the lever, which means that the manually operated lever handle travels a much greater distance than the wedge itself that is to be pushed into the durian fruit, as the wedge is positioned much closer to the lever's pivot point than the lever handle. This distance or radius ratio reduces the force required to push down the lever handle. However, depending on the lever-length ratio (even when using this lever system), the force required to push down the lever can still be relatively large, meaning that opening many durian fruits is still tiring for the staff.

By means of such lever systems, durian fruits can be opened despite their hard shell, whereby the lever systems can be operated manually, ie they do not necessarily require a motor drive.

• - zu sperrig für die Unterbringung bzw. Lagerung und für den Betrieb,
• - zu schwer für einen regelmäßigen Transport,
• - zu teuer in der Anschaffung und/oder
• - aus sonstigen Gründen nicht betreibbar oder nicht rentabel ist.

However, the problem still exists today that opening durian fruits - as well as the subsequent preparation process, sale and consumption - is impossible wherever a lever system for opening durian fruits is either

• - too bulky for storage and operation,
• - too heavy for regular transport,
• - too expensive to purchase and/or
• - is not operable or not profitable for other reasons.

Due to these adverse conditions in the operation of the lever systems, durian fruits are - at least traditionally - almost only processed and consumed in sufficiently large restaurant kitchens, whereas the operators of smaller snack bars and sales stands and their customers and guests have to do without them.

The object of the present application is to provide a device for opening durian fruits that allows durian fruits or their shells to be opened with significantly less force than conventional methods. Furthermore, the device should also be more space-saving, lighter, and/or less expensive than conventional devices.

It is furthermore the object of the present application to provide a suitable method for opening durian fruits, which makes it possible to open durian fruits with reduced effort, anywhere - even on the move, on the street or in confined spaces.

This problem is solved by the subject matter of patent claims 1 and 16.

The device proposed here for opening durian fruits has a splitting body that serves to penetrate into a durian fruit and thereby split or break it open. With an insertion tip located at the front in a longitudinal direction of the splitting body, the splitting body is applied to the durian fruit to be opened. The splitting body has a splitting surface, which is a surface, outer surface, and/or peripheral surface of the splitting body.

In this application, it is proposed that this splitting surface has a thread or other screw profile, whereby the device and/or the splitting body for opening a durian fruit can be rotated and/or screwed into the durian fruit.

Furthermore, a method for opening a durian fruit is provided, in which the device or the splitting body is screwed or rotated into the durian fruit.

• 1 eine Durian-Frucht in schematischer Querschnittsansicht,
• 2 eine Vorrichtung zum Öffnen von Durian-Früchten gemäß einer ersten exemplarischen Ausführungsform hinsichtlich der Geometrie des Spaltkörpers bzw. der Spaltfläche der Vorrichtung, dargestellt in schematischer Seitenansicht parallel zu einer Längsrichtung der Vorrichtung,
• 3 die exemplarische Ausführungsform gemäß 2, dargestellt in einer anderen Seitenansicht parallel zur Längsrichtung,
• 4 eine zweite exemplarische Ausführungsform der Vorrichtung zum Öffnen von Durian-Früchten,
• 5 noch eine dritte Ausführungsform einer Vorrichtung zum Öffnen von Durian-Früchten,
• 6 die Ausführungsform der Vorrichtung gemäß 2 bzw. 3 oder gemäß 4, dargestellt in der Draufsicht quer zur Längsrichtung,
• 7 die Ausführungsform gemäß 5, ebenfalls dargestellt in der Draufsicht quer zur Längsrichtung und
• 8 und 9 zwei Ausführungsvarianten, bei denen der Spaltkörper der Vorrichtung ein Metallteil sowie ein Kunststoffteil aufweist,
• 10 eine Vorrichtung gemäß einer zweiten exemplarischen Ausführungsform hinsichtlich der Geometrie des Spaltkörpers bzw. der Spaltfläche und
• 11 eine Vorrichtung gemäß einer dritten exemplarischen Ausführungsform hinsichtlich der Geometrie des Spaltkörpers bzw. der Spaltfläche.

Some exemplary embodiments are described below with reference to the figures. They show:

• 1 a durian fruit in schematic cross-sectional view,
• 2 a device for opening durian fruits according to a first exemplary embodiment with regard to the geometry of the splitting body or the splitting surface of the device, shown in a schematic side view parallel to a longitudinal direction of the device,
• 3 the exemplary embodiment according to 2 , shown in a different side view parallel to the longitudinal direction,
• 4 a second exemplary embodiment of the device for opening durian fruits,
• 5 yet a third embodiment of a device for opening durian fruits,
• 6 the embodiment of the device according to 2 or 3 or according to 4 , shown in plan view transverse to the longitudinal direction,
• 7 the embodiment according to 5 , also shown in plan view transverse to the longitudinal direction and
• 8 and 9 two design variants in which the splitting body of the device has a metal part and a plastic part,
• 10 a device according to a second exemplary embodiment with regard to the geometry of the splitting body or the splitting surface and
• 11 a device according to a third exemplary embodiment with regard to the geometry of the splitting body or the splitting surface.

1 shows a single durian fruit 100 or stink fruit in a purely schematic cross-sectional view. The fruit is approximately the size of a human head and contains five segments 101 as its actual edible components, which are similar to like an orange, are easily torn apart. However, all five fruit segments 101 are surrounded by the extremely hard skin 103. In 1 Reference numeral 102 indicates the location within the (purely schematic) cross-sectional view where (above the plane of the drawing) the former flower center is located; it is precisely there, on the outside of the shell 103, that the device for opening the durian fruit, or more precisely the insertion tip of the splitting body of this device, is applied to open the shell 103. Once the shell 103 has been split and broken open, the inner five fruit segments 101 can be easily removed. The diameter of a durian fruit according to 1 is approximately two to three times as large as the diameter of the splitting body 5 of the device, which is now based on the following 2 to 9 described.

2 shows an exemplary embodiment of the device 10 for opening durian fruits, shown in a schematic side view parallel to a longitudinal direction h of the device 10, which in 2 runs vertically. The device 10 has a splitting body 5, the surface of which, in particular the outer or peripheral surface, is also the splitting surface 5a with the aid of which a durian fruit is broken open.

2 shows that a thread 6 or other screw profile is provided in the region of the splitting surface 5a. The thread 6 or screw profile runs along the outer or peripheral surface of the splitting body 5, i.e., along the splitting surface 5a, which is also the contact surface with the durian fruit when the splitting body 5 is inserted into the durian fruit 100, i.e., turned or screwed in. The thread 6 or screw profile is thus part of the splitting surface 5a or the contact surface with which the splitting body 5 touches the shell and the interior of the durian fruit.

Except for those surface areas of the gap surface 5a which, as part of the thread 6 or other screw profile, are set back inwards and/or bulged outwards relative to the respective radius or circumference of the gap body 5, the overall profile of the (remaining) circumferential or surface serving as the gap surface 5a (or at least the overall profile of an envelope of this surface 5a) is approximately rotationally symmetrical about the longitudinal direction h. However, the grooves and/or projections of the thread 6 are always only changed in an angular range or circumferential section which corresponds only to a respective partial section of the full angular range of 360°, compared to the otherwise preferably rotationally symmetrical shape of the (remaining) gap surface 5a, whereby this angular range or partial section of the grooves or projections - depending on the number of provided turns - encircles the interior of the gap body 5 several times.

The device 10 essentially comprises the splitting body and otherwise requires practically no additional parts (in particular no moving parts); at most, a handle 8 (possibly also comprising a connecting part 18) is provided behind the splitting body 5 in order to hold and grip it, and to screw it into the durian fruit using the thread 6 or screw profile.

Due to the thread 6 or screw profile proposed here, the device 10 does not require any lever mechanism, and the splitting body 5 no longer needs to be pressed or pushed into the durian fruit with great force, but can be screwed or screwed into the durian fruit 100 with considerably less force or torque. Despite the hard shell of durian fruit, screwing or screwing in the device proposed here is so easy that anyone - even a child - can break open the durian fruit with their bare hands (and this innovative device).

• - eine Unterlage zur Aufnahme einer Durian-Frucht,
• - ein schwenkbarer Hebel,
• - ein Führungsmechanismus für das Hineinführen des Spaltkörpers (mit Hilfe des Hebels) entlang der Längsrichtung des Spaltkörpers in die Durian-Frucht und
• - ein Gehäuse oder zumindest eine sonstige robuste, stabile Verankerung des Hebels und des Führungsmechanismus an der Unterlage für die Durian-Frucht.

The 2 and 3 The device shown is therefore much simpler in construction than a conventional lever system, which requires, in addition to the actual splitting body, the following additionally:

• - a base for holding a durian fruit,
• - a pivoting lever,
• - a guide mechanism for guiding the splitting body (with the help of the lever) along the longitudinal direction of the splitting body into the durian fruit and
• - a housing or at least some other robust, stable anchoring of the lever and the guide mechanism to the base for the durian fruit.

All of these components are no longer necessary in the device proposed here; the device 10 described in this application can therefore be a purely handheld and portable device that can be operated manually. This device 10 can even be operated with just one hand and can be constructed, in particular, as a one-piece or single-piece handheld device or as a mere kitchen utensil, for example, as a plastic molded part, in particular as an injection-molded part. In particular, the splitting body 5, which rotates when screwed into a durian fruit and thereby The screw thread 6, which screws ever deeper through the shell into the interior of the durian fruit, can be manufactured as a plastic or injection-molded part. In particular, the gap surface 5a, including the complex, three-dimensional shape of the thread 6 or screw profile, can be manufactured by injection molding, i.e., as an inexpensive plastic molded part.

While conventional devices that have been used for many decades to open durian fruits are always large and unwieldy lever systems in which the splitting body is pressed into the durian fruit along its length by means of a lever mechanism, the device proposed here makes it much easier to screw or twist it into the durian fruit with just one hand (or even just with a few fingers).

The device 10 or the handheld device is gripped or held, for example, with one hand and placed with a frontmost tip of the splitting body 5, which serves as the insertion tip 1, against the flower center 102 of a durian fruit 100. The thread 6 or other screw profile can optionally begin at the insertion tip 1 (or at a front region 2 encompassing the insertion tip 1) (not shown) or only in a middle region 3 behind it, which encompasses the essential part of the length of the splitting body 5 and extends to an end region 4 or rear region of the splitting body 5. When the splitting body 5 is screwed into the durian fruit, initially only the insertion tip 1 penetrates the durian fruit, followed by the front region 2, then the middle region 3, and finally, if necessary, also the rear region 4 of the splitting body 5, up to which the thread 6, 7 extends. In the process, the durian fruit continues to open. At the latest when the end region 4 or rear region penetrates, the crack in the durian fruit's shell is as wide as the maximum radius R of the splitting body 5 or its splitting surface 5a. However, the splitting body 5 only needs to be screwed into the durian fruit until the fragments of the shell 103 can be separated from each other by hand without great effort, and the fruit contents can be removed.

3 shows the device 2 , shown in a side view rotated by 90° parallel to the longitudinal direction h. The splitting body 5 or its outer splitting surface 5a forms - at least apart from the thread 6 or other screw profile - a rotational body or a rotational surface. This also corresponds to the intended purpose, according to which the splitting body 5 is to be screwed into a durian fruit. In particular, if (as in the 2 and 3 shown) the thread 6 or screw profile is realized in the form of a depression or recess (for example as a spirally circumferential groove), at least the envelope of the gap surface 5a is a surface of revolution.

As in 3 As can be seen, the gap surface 5a and the rotatable gap body 5 or rotational body have a radius r or a circumference relative to its longitudinal direction h, which varies and increases from the insertion tip 1 to the end region 4 or rear region of the gap body 5. This radius varies with the height, i.e. with the distance from the insertion tip 1 measured in the longitudinal direction h; this radius can grow monotonously with increasing distance, in particular increase in a straight line or uniformly, but can also grow non-linearly. At a respective distance a from the insertion tip 1, the radius r there then takes on a respective value. With increasing distance a from the insertion tip 1, the gap body 5 or the gap surface 5a becomes ever wider and reaches a maximum radius R at the end region 4 or rear region of the gap body 5.

At each distance a from the insertion tip 1, there is always - due to the thread or screw profile 6 - a specific (azimuthal) angular range in the azimuthal direction along the outer circumference in which (as a result of the groove or a projecting web of the thread or screw profile 6) the circumferential section deviates locally from the radius r there, i.e., is recessed or curved outwards. Nevertheless, the gap surface 5 has a defined or at least definable (outer) radius r for each distance a from the insertion tip 1, i.e., for each height above it, and also a respective (outer) circumference.

1. a) als derjenige Radius, der sich ergibt, wenn man für die Radiusmessung nur denjenigen (übrigen) azimutalen Winkelbereich berücksichtigt, der zwischen den Gräben oder Emporwölbungen des Gewindes 6 liegt, d.h. der durch das Gewinde weder erhöht noch vertieft ist,
2. b) als derjenige Radius(-Mittelwert), der sich ergibt, wenn der mit dem azimutalen Winkel schwankende Radius (d.h. der seitliche, horizontale Abstand von der Mittelachse, d.h. von der mit h bezeichneten Längsrichtung) über den gesamten azimutalen Winkelbereich von 0° bis 360° gemittelt wird, oder
3. c) als der größte Radiuswert, der sich bei dem vorgegebenen senkrechten Abstand a von der Einführspitze 1, aber beim Radius-Vergleich für sämtliche azimutalen Winkel (zwischen 0° und 360°) als (lokaler) Höchstwert für den Radius ergibt.

This respective radius r (at the respective distance a or at the respective height in the longitudinal direction h) can be defined, for example:

1. a) as the radius which results when only the (remaining) azimuthal angle range which lies between the grooves or bulges of the thread 6 is taken into account for the radius measurement, ie which is neither raised nor depressed by the thread,
2. b) as the radius (average value) which results when the radius varying with the azimuthal angle (ie the lateral, horizontal distance from the central axis, ie from the longitudinal direction designated by h) is averaged over the entire azimuthal angle range from 0° to 360°, or
3. c) as the largest radius value which results as the (local) maximum value for the radius at the given vertical distance a from the insertion tip 1, but when comparing the radius for all azimuthal angles (between 0° and 360°).

The thread or screw profile is compared to the remaining gap surface 5a - at least in the example of 2 and 3 - realized as a groove-shaped depression or groove, but could alternatively also be constructed as a web-shaped elevation or upward curvature.

Alternatively, the thread or screw profile can comprise both local depressions and local elevations in combination with the remaining gap surface 5a. In this case, the radius determination in case b) results in the same or a similar radius value as in case a), whereas in case c) a larger (local) radius value results, which corresponds to the radius of the webs or bulges projecting further outwards (and also corresponds to the radius of an envelope of the gap surface 5a).

The width, i.e., the radius r of the splitting body 5 and its splitting surface 5a, specified, for example, according to one of methods a) to c), becomes increasingly larger from the insertion tip 1 (or at least from region 2 or 3 of the splitting body) towards the end region 4 or rearmost region. At the end of the splitting body 5, which is at the maximum distance from the insertion tip 1, this radius r assumes the maximum value R. Typically, this radius is approximately 4.5 to 5 cm (corresponding to approximately 1.75 to 2 inches); i.e., the diameter of the widest end region 4 is approximately 8 to 10 cm; e.g., 9 cm. The height H of the splitting body 5 or its splitting surface 5a between the insertion tip 1 and the widest end region 4 can be approximately between 8 and 12 cm and, for example, 10 cm or 4 inches.

In the simplest case, the width or the radius r of the gap surface 5a, which continues to increase in the longitudinal direction h, increases not only monotonically but also linearly - be it over the entire vertical distance between the insertion tip 1 (or the area 2 located near the insertion tip 1) and the end area or rear area 4, or only in a partial area, for example only in a central area 3 of the gap body 5. Then the gap body 5 or the gap surface 5a has a constant widening angle α overall or at least in this height range and thus runs conically or conically. This widening angle α, which is measured relative to the longitudinal direction h, i.e. actually around the longitudinal direction h, could also be referred to as the "opening angle" of the gap body 5 or its gap surface 5a. The constant widening angle α is, for example, between 10° and 40°, preferably between 25° and 35°; for example, it can be 30°.

However, the widening angle α relative to the longitudinal direction h can also vary depending on the height h or distance a from the insertion tip 1. Even then, the locally varying values of the (height-dependent) widening angle α can be, for example, between 10° and 40°, preferably between 25° and 35°. Preferably, the widening angle α at the insertion tip 1 (or in the region 2 near the insertion tip 1) is smaller, in particular at least 10° or 15° smaller, than in the central region 3 (and/or the rear end region 4) of the splitting body 5. This facilitates the penetration of the splitting body 5 (or at least a front region 2) into the durian fruit 100 immediately after the insertion tip 1 is applied to the durian fruit 100.

The widening angle α of the split body 5, which varies depending on the height (depending on the distance a), can increase continuously and, in particular, steadily; also at the transition between the front region 2 and the middle region 3 (and/or between the middle region 3 and the rear region 4) of the split body 5.

The thread 6 or screw profile runs, for example (as in the 2 and 3 shown) spiral or worm-shaped within (or in the lateral direction below) the respective radius r of the split body 5. For example, the thread 6 or other screw profile can be designed exclusively as a (spiral and/or worm-shaped circumferential) recess (ie as a depression or groove) relative to the remaining, rotationally symmetrical surface area of the split surface 5a, as can be seen from the 2 and 3 explained above.

Alternatively, the thread 6 or screw profile can also extend outside (or in the lateral direction above) the respective radius r of the gap body 5, i.e. it can run around the remaining surface area of the gap surface 5a from the outside in a spiral or worm-like manner.

It is advantageous if the thread or screw line is continuous in the azimuthal direction, i.e. free of any interruptions, teeth or other irregularities along the spiral depression or upward bulge, so that the split surface 5a, when screwing into the durian fruit, offers as little resistance as possible to this rotational or screwing movement and can slide past the edge of the shell 103 (or the edges of the shell pieces still attached to one another) as easily as possible.

In the longitudinal direction h, the width or radius r of the splitting body 5 (up to the height H, ie up to the maximum radius R) continues to increase. In addition, the thread 6 or screw profile has a spiral or worm-shaped shape, in and/or along this splitting body 5, whose width or radius r continues to increase. Together, this means that the splitting body 5, when it is turned or screwed into a durian fruit, holds itself to the durian fruit by means of the thread 6 or screw profile, i.e. it secures itself against slipping out of the durian fruit, while at the same time it continues to split and/or break open the durian fruit when screwed in. Thus, the counterforce of approximately 30 to 40 kg, which pushes the shell of the durian fruit in the opposite direction (i.e. in 2 or 3 along the negative longitudinal direction h) is almost completely absorbed by the splitting body 5 itself, without the need for any external levers, abutments or other supporting elements.

On the other hand, it is also desirable that the splitting body 5 is not permanently attached or anchored to the durian fruit by the thread 6 or screw profile, but rather that the shell is split into several pieces and broken by the thread 6 or screw profile. The novel device 10 or the splitting body 5 also achieves this. Even if the device 10 or the splitting body 5 is manufactured as a plastic molded part (e.g., as a plastic injection-molded part), the strong forces of the durian fruit's shell can be absorbed by the splitting body itself. This results in very low manufacturing costs despite the complex geometry of the thread or screw profile.

While in a conventional lever system the resistance that the durian fruit offers to the splitting body (and to a somewhat lesser extent to the lever) can be felt along the entire path of the lever handle, this resistance does not occur at all in the device 10 proposed here, or only at the very beginning, because as soon as the thread 6 reaches the shell 103 of the durian fruit 100, the thread 6 itself absorbs the counterforce with which the durian fruit attempts to push the splitting body 5 out again. The remaining force or torque to screw the thread further in is so small that any person, and even any child, can split a durian fruit by hand using the hand-held device 10.

This will allow durian fruits to be opened and processed anytime and anywhere, for example, in restaurants with limited kitchen space, at street stalls, or in other confined or temporarily used spaces, or even on the go. Furthermore, expensive investments in a conventional lever system will no longer be necessary, and transporting the handheld device proposed here is also completely straightforward.

Furthermore, 3 even clearer than 2 the handle 8; this can comprise a connecting part 18 or be connected to the splitting body 5 via such a connecting part. The entire handheld device 10 can, for example, consist of two injection-molded plastic parts that are attached to one another at or near the rear region 4 of the splitting body 5.

4 shows a second exemplary embodiment of the device for opening durian fruits, in which the handle 8 has two external connecting parts 18 or is connected to the splitting body 5 by these. Here, the handle 8 is thus attached further outward, i.e., closer to the outer circumference of the splitting body 5, and is connected to it at two opposite points simultaneously. Here, the handle is therefore more stable; in particular, it is less likely to be damaged or broken off from the splitting body 5 under the influence of external forces.

5 shows a third exemplary embodiment of the device for opening durian fruits, in which the handle 8 is fully or partially embedded from behind into the splitting body 5, e.g. in its end region or rear region 4, where the radius of the splitting body 5 or the splitting surface 5a is the largest. In this embodiment, the distance (in the longitudinal direction h) between the handle 8 and the insertion tip 1 is significantly smaller than in the embodiments of the 2 to 4 , which can further facilitate the operation of the handset 10; this embodiment is also suitable, for example, for children with small hands. 4 and 5 (as well as 8 and 9) the thread 6 is not explicitly shown for the sake of simplicity, but of course it is present as in the 2 and 3 . The course of the gap surface 5a according to the widening angle α is also shown schematically in a simplified conical or conical manner.

All features and explanations mentioned above 2 or 3 can also be applied, alone or in combination, to all other figures and to all other embodiments (including the patent claims) (and vice versa). This also applies to all features described below.

Of course, the handle 8 can also be used in a different way than in the 2 to 5 Regardless of the specific embodiment, the handle 8 can, for example, be shaped in such a way that it is equally suitable for operation by both right-handed and left-handed persons.

However, the handle can also be asymmetrical, for example non-mirror symmetrical be metrically shaped, especially to facilitate screwing in a given direction or direction of rotation. 2 and 3 For example, it can be seen that the thread 6 in the splitting body 5 is designed such that the splitting body 5 can be turned into a durian fruit by means of a clockwise rotation, i.e. by a right-handed rotation. This direction of rotation naturally requires more torque than the opposite direction of rotation, because the splitting body 5 is turned ever deeper into the durian fruit (instead of out) and its skin splits further and further. The handle could therefore be shaped in such a way that right-handed rotation is facilitated; e.g. by an S-shaped (or for the right-handed winding profile made of 2 and 3 then mirrored S-shaped) or other course of the handle 8 (viewed in the plane perpendicular to the longitudinal direction h).

Furthermore, abutments could be provided on the handle of one of the embodiments in order to rotate the splitting body 5 relative to the durian fruit using, for example, two, three, four or five fingers of one hand.

6 shows the embodiment according to the 2 and 3 or the one according to 4 - now shown in the plan view from above along the longitudinal direction h. The handle 8 can extend beyond the maximum rear radius R or diameter of the splitting body 5, provided this facilitates operation, ie the rotation of the device 10.

7 shows the third embodiment according to 5 - also shown in the plan view from above along the longitudinal direction h. On the back or rear side of the split body, a cavity 19 can be seen (see also 5 ), into which a hand can engage in order to grasp the handle 8. The user's hand can thus engage the interior of the splitting body 5, whereby the splitting body 5 is held and rotated at an even shorter distance from the insertion tip 1, ie, can be handled even more safely. This embodiment can be advantageous for children's hands. The handle 8 is designed as a mere transverse web within a recess or within the cavity 19 and can be grasped as a whole.

Alternatively, the handle can be 7 but also be a mere bridge, which has two troughs or two cavities 19 on the (in 7 upwardly facing) rear side of the splitting body 5. This variant is also suitable, for example, if the handle 8 is to be gripped only with the fingers (e.g. only with three or four fingers), with the thumb engaging in one recess and the remaining fingers in the other recess in order to rotate the splitting body 5 by means of the handle 8 or crosspiece.

However, if the handle 8 is designed not only as a web but as a bridge, and if only a single depression or a single cavity 19 is provided which is crossed by the bridge-like handle, the handle can also be completely grasped with the fingers.

The embodiment according to the 5 and 7 is also more space-saving than the first and second embodiments.

• - der Abstand zwischen den benachbarten Windungsabschnitten (bzw. Windungs-Vertiefungen oder -erhöhungen),
• - die Breite der Windungsabschnitte und/oder
• - die Tiefe bzw. Höhe der Windungsabschnitte

einheitlich groß gestaltet sind - zumindest im mittleren Bereich 3 und im hinteren Endbereich 4 des Spaltkörpers 5.In any embodiment of this application, the thread 6 is preferably formed such that

• - the distance between the adjacent winding sections (or winding depressions or elevations),
• - the width of the winding sections and/or
• - the depth or height of the winding sections

are of uniform size - at least in the middle area 3 and in the rear end area 4 of the splitting body 5.

• - der Abstand zwischen den benachbarten Windungsabschnitten (bzw. Windungs-Vertiefungen oder -erhöhungen),
• - die Breite der Windungsabschnitte und/oder
• - die Tiefe bzw. Höhe der Windungsabschnitte

auch kleiner gestaltet sein als im mittleren Bereich 3 (und/oder im hinteren Endbereich 4) des Spaltkörpers 5. Dadurch erleichtert der vordere Bereich 2 das anfängliche Hineinschrauben des Spaltkörpers 5 in die Schale der Durian-Frucht. Kleinere Abmessungen des Gewindes 6 im vorderen Bereich 2 des Spaltkörpers 5 erhöhen zudem die Stabilität und Bruchsicherheit der Einführspitze 1.In the front area 2, however,

• - the distance between the adjacent winding sections (or winding depressions or elevations),
• - the width of the winding sections and/or
• - the depth or height of the winding sections

can also be designed smaller than in the middle area 3 (and/or the rear end area 4) of the splitting body 5. This makes it easier for the front area 2 to initially screw the splitting body 5 into the shell of the durian fruit. Smaller dimensions of the thread 6 in the front area 2 of the splitting body 5 also increase the stability and fracture resistance of the insertion tip 1.

However, at least in the predominant vertical section of the splitting body 5 - in particular in the middle area 3 and in the rear area 4 - the dimensions and distances between the individual turns (or the turn sections adjacent in the longitudinal direction h) of the screw line should be selected to be as uniform as possible so that the splitting body 5 can be rotated into the shell of the durian fruit with the least possible resistance.

Incidentally, the front section 2 of the split body preferably comprises the front 5 to 10 percent, maximum the front 15 percent of the length, ie height H of the split body 5. The middle Region 3 or the middle and rear regions 4 together thus comprise at least 85, preferably at least 90 percent of the height H of the splitting body 5. The rear end region 4 can optionally be a rear, widest circumferential section of the splitting surface 5a or of the splitting body 5, but can also comprise only the region of the device located behind the complete splitting surface 5 and thus be the end region 4 of the device, which itself does not belong to the splitting surface 5a.

In this and all other embodiments of this application, the splitting body 5 and/or its splitting surface 5a can, in particular, be or contain a (coated or uncoated) metal part; in particular from the insertion tip 1 up to and including the height range in which the thread 6 is arranged (i.e., at least in regions 2 and 3). Especially in the region of the thread, a metal (including alloys, etc.) is particularly well suited to withstand the strong compressive forces of the durian fruit's skin. Furthermore, the splitting body 5 and/or its splitting surface 5a can also be or contain a plastic part, for example, an injection-molded part. These and other materials can, of course, also be provided for the handle 8 or other regions of the device 10; regardless of whether this device is constructed in one piece or composed of several components.

The device 10 provided by this application constitutes a shell opening device or shell opener specifically designed for durian fruits. Thanks to its design suitable for screwing into the durian fruit, it is a device that does not require any moving parts; in particular, it is a one-piece component or handheld device (or at least an integral component or handheld device composed of several components).

The 8 and 9 show two embodiments in which the device 10 has not only a metal part 9, but also a plastic part 11, for example an injection-molded part.

According to 8 the metal part 9 forms the insertion tip 1 or the front area 2 comprising the insertion tip 1 as well as the middle area 3 of the splitting body 5. The rear end area 4 of the splitting body 5 can, as in the other figures, preferably also belong to the metal part 9, but can (according to 8 or 9 ) can also be designed as a plastic part 11, for example as an injection-molded part.

According to 9 the metal part 9 not only forms the front area 2 comprising the insertion tip 1 and the middle area 3 of the split body 5, but extends completely through the middle, e.g. through a central opening in the plastic part 11. This enables a particularly stable and robust attachment of the plastic part 11 and the metal part 9 to one another.

The metal part 9 forms, as in 8 a front part 13 of the splitting body 5 projecting in the longitudinal direction h. According to 9 the front part 13 not only forms the insertion tip 1 and the middle area 3, but also passes through the rear end area 4 of the splitting body 5.

At least in the area extending from the insertion tip up to and including the height range over which the thread 6 runs, the split body 5 and/or at least its split surface 5a is preferably formed from metal or from a metallic or metal-containing material (with or without coating).

The course of the gap surface 5a according to the widening angle is shown in the 4 , 5 , 8 and 9 shown conically for simplicity.

Although durian fruits have always been known and valued as food, the tool described here, thanks to its profiled splitting body 5, i.e. provided with a thread 6,7, makes it possible for the first time to break open a durian fruit with little effort, with the least possible use of force and without the aid of conventional lever systems.

Wherever the thread 6 is mentioned in the preceding figures or anywhere in this application, this thread 6 can also be merely a partial thread, i.e., a partial thread or a thread section; this is indicated by the additional reference numeral 7 (for such a thread section 7). The partial thread 6 or the thread section 7 then forms the predominant section or subsection of an even longer thread or thread course, but does not encompass it entirely, but only the predominant (and more important) part that serves to split and/or break open the durian fruit.

The thread 6 (or possibly partial thread, i.e. this thread section 7) arranged in the central region 3 and/or end region 4 of the splitting body 5 or the splitting surface 5a, intended for splitting and/or breaking open the shell of a durian fruit, can widen to a maximum radius, which is preferably at least 25 millimeters, in particular at least 40 millimeters, but can also be even larger. This allows the shells of durian fruits or whose fragments or shell pieces split or break open to a distance from one another which is, for example, at least 5 cm or at least 8 cm (or even greater); this distance corresponds to the diameter of the splitting body 5 (or at least the thread 6 or thread section 7) at its maximum penetration depth into the durian fruit.

In the 4 , 5 , 8 and 9 The split body 5 or its split surface 5a - although not explicitly shown in these schematic figures for the sake of clarity - naturally also has a thread 6 or a screw profile; the thread 6 or screw profile can, for example, be as shown in the 2 and 3 shown (or alternatively as in 10 or 11 shown).

10 shows a device according to a second exemplary embodiment with regard to the geometry of the gap body 5 or the gap surface 5a; shown in a side view as in 2 or 3 .

According to 10 The split body 5 or its split surface 5a is shaped such that successive turns of the thread 6 or screw profile directly abut one another with their lateral edges. As a result, the boundary between successive turns forms an acute-angled edge 20 that protrudes in the radial or at least lateral direction; this edge 20 extends spirally and/or in a helical manner along the circumference of the split body 5 or the split surface 5a. According to 2 and 3 In contrast, the adjacent turns are spaced apart from each other; the distance between them corresponds to a narrow strip where the surface of the gap body 5, ie, the gap surface 5a, coincides with the envelope of the gap surface 5a. This strip is bounded by two edges, of which preferably one edge (in particular the upper edge) is an acute-angled edge, ie, with an angle of less than 90°.

In comparison, according to 10 , where between adjacent turns there is no strip of the surface 5a, but only a single edge, the angle of this (also acute-angled) edge 20 - ie the angle between the surfaces or partial surfaces of the two adjacent turns of the thread 6 or thread section 7 - is even smaller than in 2 and 3 ; for example, less than 60°, less than 45° or even less than 30°. Due to this even more acute angle, the splitting body 5 or its splitting surface 5a has 10 a further improved suitability to anchor itself to the inner edges of the shell or to the breaking pieces of the shell of the durian fruit and thereby prevent the splitting body 5 or the splitting surface 5a from slipping out of the durian fruit when splitting or breaking it open.

On the other hand, it is advantageous if this acute angle is at least greater than 20°, preferably at least 25°. This ensures sufficient material thickness of the webs provided with the acute-angled edge 20 between the individual turns or 360° turn sections (or of the spiral or helical-shaped, laterally protruding web), which can withstand even the strong forces of the durian fruit's peel.

But simply because of the innovative design of the splitting surface 5a, the device 10 or splitting body 5 can be easily screwed into a durian fruit by hand. The resistance to this screwing movement is so low that the device can be screwed or turned into the durian fruit manually (even by children) using only one hand. The other hand is free; for example, to hold the durian fruit itself.

This very low resistance is determined - apart from the fact that a thread 6 or screw profile is provided at all - further by the opening angle of the splitting body 5 and by the pitch angle of the thread 6 or screw profile, i.e. by the pitch angle of its spiral or worm-shaped profile.

This pitch angle of the thread along the circumference of the splitting surface 5a can be constant over the entire height of the thread 6, but can also vary depending on the height section along the longitudinal direction h (and thus depending on the height-dependent diameter of the thread 6). Even if the angle of inclination of the thread 6, 7 varies while screwing into the durian fruit, this does not interfere with or hinder the splitting and/or breaking open of the durian fruit because the durian fruit mainly engages in the (partial) thread 6 or the thread section 7 only with its hard shell, i.e. with the mutually facing side edges of the outer shell of its breaking-apart shell pieces. The fruit segments under the shell, on the other hand, and their skin are so soft that they offer no significant resistance to the screwing of the splitting body 5 into the durian fruit. Thus, while the device 10 is rotated into a durian fruit, the force with which the skin of the durian fruit presses from the side against the splitting surface 5a (ie towards the center of the splitting body 5) is almost exclusively in a narrow height section (along the longitudinal direction h) which corresponds to the thickness of the skin of the durian fruit.

Preferably (at least over the vertical extent of the thread 6 or screw profile), the width of the turns (or more precisely the grid dimension according to which these turns are provided consecutively in the vertical direction) is between 5 and 15 millimeters, preferably 7 to 12 millimeters. The preferably constant turn width or turn height selected within this range corresponds to the typical shell thickness of a durian fruit. This ensures that the shell of a durian fruit (engaging from the side) engages in the (partial) thread 6 only over the width (i.e., height in the longitudinal direction h) of a single turn, i.e., over a turn section that only encircles the circumference of the splitting body 5 once and thus corresponds to only a single circuit of 360°. Any height-dependent change in the local angle of inclination of the thread 6 therefore does not impair the functionality of the splitting body 5.

All detailed features and explanations regarding the thread in 10 are equally applicable to the designs of the previous 2 to 9 as well as on 11 Conversely, all previously explained features and explanations regarding the device of the 2 to 9 also to the additional embodiments of the 10 or 11 transferable; in this respect, repetition of the respective explanations is omitted.

According to 10 The thread 6 can begin just above the insertion tip 1; for example, at a distance of 4 to 10 millimeters. The first, foremost area 2, which is close to the insertion tip 1 and/or constitutes this insertion tip 1, can still be pushed relatively easily into the skin of the durian fruit and through the skin (or alternatively, screwed; cf. 11 ), because the foremost area 2 or the insertion tip only creates a point-like penetration of the shell. However, the much greater resistance (especially with conventional lever systems) only arises when the shell, which has already been pierced at points, is to be divided into two or more fragments; precisely in this case, the forces are insurmountable due to the hardness of the shell, at least unless the device 10 described in this application is used.

According to 10 the insertion tip 1 or the area 2 which lies in front of the thread 6 or screw profile in the longitudinal direction h of the splitting body 5 is conical or otherwise rotationally symmetrical, in particular thread-free.

The insertion tip 1 or the area 2 located near the insertion tip 1 can - as in 2 and 3 - be more pointed, ie have a smaller opening angle than the middle area 3 (and/or end area 4) of the splitting body 5, which further facilitates the selective penetration of the durian fruit's skin. Alternatively, the insertion tip 1 and/or area 2 can also - as in 10 or 11 - have substantially the same opening angle as the central region 3 (and/or end region 4) of the splitting body 5, which reduces the risk of the front region breaking off from the wider, remaining part of the splitting body 5; for example, in the event of improper handling or if the device with the insertion tip 1 falls onto a hard floor.

Wherever in this application, where the thread 6 (or screw profile) is mentioned, such a thread 6 (or screw profile) can also be or comprise a partial thread (or only a partial screw profile) which forms the predominant area (in particular a middle and/or rear area in the insertion direction) of an even longer thread or thread profile.

This thread course can extend further forward in the direction of the insertion tip 1 than the actual thread 6 or partial thread or than the actual thread section 7, which is intended for splitting and/or breaking open the shell of the durian fruit.

In front of the actual thread 6, partial thread or thread section 7, there may be another, in particular front thread 16, partial thread or front thread section 17; among other things, this feature will be explained below by way of example with reference to the 11 explained.

11 shows a device according to a third exemplary embodiment with regard to the geometry of the gap body 5 or the gap surface 5a. According to 11 on the insertion tip 1 (or in the area 2 located near the insertion tip 1) in front of the thread 6 or partial thread or thread section 7 (which is actually used to split and/or break open the durian fruit), a further thread 16 or partial thread or a further thread section 17 is provided.

This further thread 16 or partial thread or this further thread section 17 is intended for drilling into the shell of a durian fruit and/or for drilling through the shell before the shell is split or broken open by means of the actual rear thread 6 or the thread section 7 (in the middle 3 and/or rear end area 4 of the splitting body 5), ie into several into smaller fragments or pieces of the shell. The additional thread 16 or partial thread or the additional thread section 17 also facilitates the initial, selective penetration of the shell.

• - eine kleinere Windungsbreite,
• - einen kleineren Windungsabstand zwischen (bzw. ein kleineres Rastermaß für) benachbarten Windungen und/oder
• - eine kleinere Windungstiefe

als das für den Vorgang des Spaltens und/oder Aufbrechens der Schale bestimmte eigentliche (erste) Gewinde 6 oder Teilgewinde bzw. als der eigentliche (erste) Gewindeabschnitt 7.This front (or second) thread 16 or partial thread or this front thread section 17 preferably has

• - a smaller winding width,
• - a smaller pitch between (or a smaller pitch for) adjacent turns and/or
• - a smaller winding depth

as the actual (first) thread 6 or partial thread intended for the process of splitting and/or breaking open the shell or as the actual (first) thread section 7.

Preferably, it can be provided that the insertion tip 1 and/or the adjacent region 2 has a height (along the longitudinal direction h) which is between 4 and 20 millimeters, preferably between 6 and 12 millimeters.

Furthermore, it can be provided that in the overlying, middle 3 region (and/or end region 4) of the split body 5 or the split surface 5a, the actual first thread 6 or partial thread or the actual thread section 7 widens to a maximum radius, which is preferably at least 25 millimeters or at least 40 millimeters. This allows the shell pieces to be broken apart or separated sufficiently far to subsequently tear them off by hand.

All features explained with respect to thread 6 can be applied analogously to the further thread 16 or partial thread or to the further thread section 17, which is located upstream of the first thread (section) 6, 7, i.e., is arranged longitudinally in front of it. Only the dimensions of the turns on the upstream thread (section) 16, 17 are considerably smaller; preferably at most half or one-third the size of the dimensions of the turns of the thread (section) 6, 7; this particularly applies to the turn width, turn depth, and pitch (or spacing) of the turns.

Furthermore, a transition section between the two partial threads 6, 16 or thread sections 7, 17 can also be provided in region 2, where the winding width and/or depth continuously decreases (not explicitly shown in the figures). Otherwise, in the figures and other embodiments of this application, the various variants are interchangeable with respect to the nature of the insertion tip 1 and/or the front region 2.

List of reference symbols:

1

insertion tip

2

Area

3

middle range

4

End area

5

split body

5a

Cleavage surface

6

thread

7

Threaded section

8

handle

9

metal part

10

device

11

plastic part

13

front part

16

additional thread

17

further thread section

18

connecting part

19

cavity

20

acute-angled edge

a

Distance

α

Widening angle

h

Longitudinal direction

H

Height of the gap surface

r

radius

R

maximum radius

100

Durian fruit

101

segment

102

flower center

103

Peel

Claims (18)

Device (10) for opening a durian fruit (100), the device (10) comprising: - a splitting body (5) which serves to penetrate into a durian fruit (100) and thereby to split and/or break open the durian fruit (100), - an insertion tip (1) located at the front in a longitudinal direction (h) of the splitting body (5) for piercing into or at least for applying to a durian fruit (100), wherein the splitting body (5) for splitting and/or breaking open a durian fruit (100) has a splitting surface (5a), wherein the splitting surface (5a) is an outer surface and/or peripheral surface of the splitting body (5) and wherein the splitting surface (5a) has a thread (6) or another screw profile, whereby the device (10) and/or the splitting body (5) for opening a durian fruit (100) can be rotated and/or screwed into the durian fruit (100). Device (10) according to Claim 1 , characterized in that - the splitting body (5) has a radius (r) and/or circumference which increases continuously along the longitudinal direction (h) of the splitting body (5) with increasing distance (a) from the insertion tip (1), and - that due to the continuously increasing radius (r) and/or circumference of the splitting body (5), the radius (r) and/or circumference of the thread (6) or other screw profile also increases continuously, whereby the splitting body (5), when it is turned and/or screwed into the durian fruit (100), holds itself to the durian fruit (100) by means of the thread (6) or screw profile and/or secures itself against slipping out of the durian fruit (100) while it continues to split and/or break open the durian fruit (100). Device (10) according to Claim 1 or 2 , characterized in that the thread (6) or the other screw profile extends from the insertion tip (1) or from a region (2) of the splitting body (5) located close to the insertion tip (1) to a central region (3) and/or end region (4) of the splitting body (5) spaced from the insertion tip (1), and that the splitting body (5) and the thread (6) or other screw profile become increasingly wider from the insertion tip (1) or from the region (2) located close to the insertion tip (1) to the central region (3) and/or end region (4). Device (10) according to Claim 2 or 3 , characterized in that the thread (6) or the other screw profile extends from the insertion tip (1) or from a region (2) of the splitting body (5) located close to the insertion tip (1) to a central region (3) and/or end region (4) of the splitting body (5) spaced from the insertion tip (1), and in that from the insertion tip (1) or from the region (2) located close to the insertion tip (1) to the central region (3) and/or end region (4), - the radius (r) and/or circumference of the splitting body (5), and - the radius (r) and/or circumference of the thread (6) or of the other screw profile continually increases. Device (10) according to one of the Claims 1 until 4 , characterized in that the overall profile of the gap surface (5a) or the overall profile of an envelope of the gap surface (5a) in the area between - the insertion tip (1) or an area (2) located close to the insertion tip (1) and - an end area (4) or rear area of the gap body (5) spaced from the insertion tip (1) has a constant or locally varying widening angle (α) relative to the longitudinal direction (h) and/or around the longitudinal direction (h), the widening angle (α) being between 10° and 40°, preferably between 25° and 35°, for example 30°. Device (10) according to Claim 5 , characterized in that the widening angle (α) in a central region (3) of the splitting body (5), which lies in the longitudinal direction (h) between the insertion tip (1) and the end region (4) or rear region, has a constant or locally varying value between 10° and 40°, preferably between 25° and 35° and that the widening angle (α) at the insertion tip (1) or at a region (2) located close to the insertion tip (1) is smaller, preferably at least 10° smaller, than in a central region (3) and/or in a rear region (4) of the splitting body (5). Device (10) according to one of the Claims 2 until 6 , characterized in that the thread (6) or other screw profile runs spirally and/or helically on, on and/or under the radius (r) and/or circumference of the splitting body (5). Device (10) according to one of the Claims 2 until 7 , characterized in that the thread (6) or other screw profile is a recess which runs spirally and/or helically below the radius (r) and/or circumference of the splitting body (5). Device (10) according to one of the Claims 1 until 8 , characterized in that the gap body (5) and/or the gap surface (5a) is shaped in such a way that successive turns of the thread (6) or of the other screw profile directly abut one another with their lateral edges, whereby the boundary between successive turns has an acute-angled edge (20) which protrudes in the radial and/or lateral direction and which runs spirally and/or helically along the circumference of the splitting body (5) and/or the splitting surface (5a). Device (10) according to one of the Claims 1 until 9 , characterized in that - the insertion tip (1) and/or a region (2) located near the insertion tip (1), which lies in front of the thread (6) or the other screw profile in the longitudinal direction (h) of the splitting body (5), is intended for piercing and/or piercing a shell (103) of the durian fruit (100) before the shell (103) is split and/or broken open by means of the thread (6) or the other screw profile, and - that the insertion tip (1) or the region (2) located near the insertion tip (1) is conical on the outside or otherwise rotationally symmetrical, in particular thread-free. Device (10) according to one of the Claims 1 until 9 , characterized in that - the thread (6) or other screw profile is or has at least one partial thread or threaded section (7), which forms the predominant area, in particular a central area (3) in the insertion direction and/or rear end area (4) of an even longer thread (6) or thread profile, and - that the splitting body (5) and/or the splitting surface (5a), in addition to the thread (6), partial thread or threaded section (7), also has a further, in particular front thread (16), partial thread and/or a further, in particular front thread section (17), which is arranged on the insertion tip (1) and/or in the area (2) located close to the insertion tip (1) and is intended for drilling into a shell (103) of the durian fruit (100) and/or for drilling through the shell (103) before the shell (103) is split and/or broken open. Device (10) according to Claim 11 , characterized in that the further, in particular front thread (16), partial thread and/or the further, in particular front thread section (17) - has a smaller winding width, - a smaller winding spacing between adjacent windings and/or - a smaller winding depth than the rear thread (6), partial thread or the rear thread section (7) serving to split and/or break open the shell (103). Device (10) according to one of the Claims 10 until 12 , characterized in that - the insertion tip (1) and/or - the region (2) located near the insertion tip (1) and at the front in the longitudinal direction (h) of the splitting body (5) has a height along the longitudinal direction (h) which is between 4 and 15 millimeters, preferably between 6 and 12 millimeters, and that in the central region (3) and/or end region (4) of the splitting body (5) and/or the splitting surface (5a) located behind it, the rear thread (6), partial thread or the rear thread section (7) intended for splitting and/or breaking open the shell (103) of a durian fruit (100) widens to a maximum radius (R) which is at least 25 millimeters, preferably at least 40 millimeters. Device (10) according to one of the Claims 1 until 13 , characterized in that the device (10) is a hand-held device for manually turning and/or screwing into a durian fruit (100). Device (10) according to one of the Claims 1 until 14 , characterized in that the device (10) has a handle (8) which is arranged and/or mounted on an end region (4) or rear region of the splitting body (5) opposite the insertion tip (1) or behind it. A method for opening a durian fruit (100), in which a device (10) for opening the durian fruit (100) and/or a splitting body (5) of the device (10) is introduced into the durian fruit (100) in order to split and/or break open the durian fruit (100), wherein a device (10) is used, - whose splitting body (5) has a splitting surface (5a) serving to split and break open the durian fruit (100), which is a surface, outer surface, and/or peripheral surface of the splitting body (5), and - in which the splitting surface (5a) has a thread (6) or other screw profile, and wherein the device (10) and/or the splitting body (5) is introduced into the durian fruit (100) by inserting the device (10) and/or the splitting body (5) into the durian fruit (100) is screwed into or otherwise twisted into the durian fruit (100). Procedure according to Claim 16 , characterized in that the method is carried out by means of a device (10) according to one of the Claims 1 until 15 is carried out and that the device (10) and/or the splitting body (5) is screwed and/or turned into the durian fruit (100) by hand. Procedure according to Claim 16 or 17 , characterized in that , as soon as the thread (6) or the other screw profile engages in the durian fruit (100), the device (10) and/or the splitting body (5) is turned and/or screwed into the durian fruit (100), and that the device (10) and/or the splitting body (5), while it holds onto the durian fruit (100) by means of the thread (6) or screw profile and/or thereby secures itself against slipping out of the durian fruit (100), is turned and/or screwed around its own longitudinal direction (h) without pressure against the durian fruit (100).

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