SAFETY AND METHOD FOR MAKING A SAFETY

Description

[0001] The present invention relates to a fuse, in particular an SMD fuse and / or an equipment protection fuse, with an insulating body having a cavity, a fusible element arranged in the insulating body and outer contact caps placed - at least indirectly - on the insulating body and electrically connected to the fusible element.

[0002] A fuse or device protection fuse within the meaning of the present invention is also referred to in the prior art as a so-called "fuse link," which can interact with a fuse holder. The fuse link can be inserted into the fuse holder.

[0003] If necessary, the fuse or fuse link is filled with an extinguishing agent, in particular sand, granules, and / or glass beads, particularly with the extinguishing agent arranged in the insulating body. The insulating body can be designed as an insulating tube. The fusible element can, in particular, be inserted axially into the insulating body. The electrical contact between the fusible element and the outer contact caps is established by a solder joint. Furthermore, the solder joint also firmly connects the outer contact caps to the insulating body.

[0004] The fusible element is designed to carry the full load current during operation and, in particular, to interrupt an overload current and / or short-circuit current as quickly as possible.

[0005] SMD fuses are fuse links that can be mounted on printed circuit boards (SMD - Surface Mounted Device). SMD fuses therefore belong to the technical field of surface mount technology (SMT). In surface mount technology, printed circuit boards are typically used as the surfaces to be assembled. In particular, SMD fuses are standardized with regard to their dimensions and electrical behavior – see IEC 60127-4 (as of September 2021) in this context.

[0006] A disadvantage of the fuse known from the prior art is that in some fuses the fusible element shifts or moves within the insulating body during manufacture - after the fusible element has been inserted into the insulating body. Ultimately, this can result in the fusible element not remaining in its intended mounting position. For example, during assembly of the fuse, the fusible element may come into contact with the inner wall of the insulating body or directly strike it. If the fusible element shifts in this way within the insulating body, the switching behavior of the entire fuse changes and, in particular, no longer corresponds to the designed values. This is extremely disadvantageous because every fuse is designed for specific values ​​and is used according to these values. Any deviation from the designed values ​​must therefore be avoided at all costs.

[0007] While fuses with displaced fuse elements can be rejected during the manufacturing process using optical inspection methods, such a procedure is comparatively complex and expensive, particularly since a visual inspection of each individual fuse must be performed. Furthermore, due to the particularly opaque insulating body, this visual inspection can only be performed as long as the outer contact caps have not yet been installed. However, if the fuse element is displaced after or during the installation of the outer contact caps, this can no longer be detected visually.

[0008] Another disadvantage of the fuse known from the prior art or the method for manufacturing fuses known from the prior art is that the connection of the fusible element to the solder joint for electrically contacting the outer contact caps is often insufficient for a permanent electrical connection. For electrical contact between the fusible element and the outer contact cap, the formation of a so-called "solder ball" - a ball made of the solder material - is required, which, however, often cannot be sufficiently ensured. This can lead to the solder or solder material seeping into the space between the outer contact cap and the insulating body, and thus there is no longer enough solder for a sufficiently permanent electrical connection between the fusible element and the outer contact caps.

[0009] US 10,290,457 B1 relates to an electrical fuse comprising an insulating body and a cavity within the insulating body. The fuse also has an outer and an inner auxiliary cap.

[0010] US 961,891 A relates to a fuse comprising an insulating body and outer contact caps.

[0011] US 5 440 802 A2 relates to a method for producing chip fuses.

[0012] The object of the present invention is therefore to avoid the aforementioned disadvantages of the prior art or at least to substantially reduce them.

[0013] According to the invention, the above-mentioned object is achieved by a fuse according to claim 1.

[0014] According to the invention, the fusible element is secured in the insulating body by means of at least one fixing means associated with a contact cap for a stable arrangement. The fixing means is placed on the end face of the insulating body, with the fixing means being at least partially covered by the associated contact cap.

[0015] In particular, the fixing means also covers the insulating body at least in part, whereby the fixing means itself is covered at least in part by the outer contact cap.

[0016] For the purposes of the present invention, "covering" means both "projecting over" and "surrounding," as well as "covering." For example, a covering by means of the outer contact cap is to be designed such that the outer contact cap covers and (in particular, completely) surrounds the fixing means.

[0017] The outer contact caps or the fixing means are designed to cover the insulating body, particularly in the area of ​​the insulating body's shell, preferably in the peripheral shell area. The insulating body can have a shell area and outer end faces. Depending on the outer shape of the insulating body, the shell area is configured to result in a cuboid-shaped insulating body and / or an at least substantially elliptical and / or circular cross-section of the insulating body.

[0018] Ultimately, the (inventive) slip-over is designed such that the insulating body is covered on the outside by the slip-over component. During the slip-over process, the slip-over component and the slip-over component can be in direct contact, or there can be a gap between the two components. Accordingly, sealing does not need to be achieved by slipping over, but an at least substantially tight seal can be provided between the insulating body and the fixing means and / or between the fixing means and the outer contact cap.

[0019] In In this context, it is understood that the outer contact cap can surround and, in particular, cover not only the fixing means, but also the respective end face of the insulating body.

[0020] An indirect arrangement of the outer contact cap on the insulating body means that the fixing means can be arranged between the outer contact cap and the insulating body. Thus, from a functional perspective, the fixing means can be referred to as an auxiliary cap, which, like the outer contact cap, can also be placed on the insulating body and, in particular, can be adjacent to the casing of the insulating body.

[0021] According to the invention, it is possible in a simple manner to fix the fusible element in the cavity of the insulating body via the at least one fixing means. Additional securing of the fixing means can be ensured by the outer contact cap, which is assigned to the respective fixing means. The outer contact cap can thus press the fixing means against the insulating body and / or connect the fixing means to the insulating body with frictional engagement and / or positive engagement. Furthermore, the fusible element can be additionally fixed by placing the outer contact cap onto the respective fixing means. For example, it can be provided that further fixing of the fusible element can be achieved by a frictional engagement between the outer contact cap and the fixing means.

[0022] Ultimately, the fusible link is electrically connected to the outer contact caps. The fusible link can be electrically connected to the fixing agent, but this is not required.

[0023] According to the invention, the at least one fixing means ensures that the fusible element is securely fixed in the insulating body, in particular centered and / or axially aligned. Subsequent displacement of the fusible element in the insulating body up to and beyond the final production of the fuse can also be avoided.

[0024] Furthermore, it is understood that the fusible element can be integrally connected to the at least one fixing means, the insulating body, and / or the outer contact cap (if necessary, additionally). In any case, this state can be present after final assembly of the fuse. In particular, the at least one fixing means is designed such that the fusible element can be fixed in and / or on it with frictional and / or positive engagement.

[0025] Advantageously, the invention eliminates the need for complex optical and manual inspection of the manufactured fuses. Consequently, the manufacturing costs of the fuse according to the invention—despite the necessary fixing agent—can be reduced compared to prior art fuses, preferably by at least 10%, due to the elimination of discarded fuses and the elimination of complex inspections. Furthermore, the invention particularly ensures that damage caused by defective fuses cannot occur.

[0026] Furthermore, fuses can be provided in which the fusible element is arranged, in particular, at least substantially axially and / or at least substantially centered in the insulating body. The at least one fixing means can, in particular, prevent the fusible element from leaning against or striking the inner wall of the insulating body—both immediately after manufacture and after a certain period of use.

[0027] The preferred positionally stable arrangement of the fusible element in the insulating body is therefore associated with a number of advantages.

[0028] Ultimately, a defined placement of the fusible conductor in the insulating body is preferably achieved via the at least one fixing means according to the invention.

[0029] The fuse according to the invention can be designed both as a so-called square (SMD) fuse - ie a fuse with an at least substantially cuboid-shaped insulating body or a fuse with an at least substantially square cross-section - and as a cylindrical fuse - ie a fuse with an at least substantially cylindrical insulating body or a fuse with an at least substantially circular cross-section.

[0030] Furthermore, the at least one fixing means makes it possible to improve the electrical contact between the fusible link and the outer contact caps - in particular since the fusible link occupies a predetermined position in the insulating body, so that the application of an electrical contacting means and / or a solder connection can be carried out in a targeted and safe manner.

[0031] In a preferred embodiment, it can be provided that the fusible element can be arranged on and / or at a carrier means or carrier material, in particular applied and / or wound. In particular, at least one glass fiber and / or a glass fiber core can be provided as the carrier means. In this context, it is understood that the carrier means is preferably fixed together with the fusible element by means of the at least one fixing means for a positionally stable arrangement. The carrier means can extend partially or completely over the length of the fusible element.

[0032] The fusible element preferably has a central region enclosed by end regions. The end regions are the outer regions of the fusible element, which may include the outer ends or the outer front ends of the fusible element—but are not limited to these. In particular, the end region of the fusible element may, for example, correspond to at least 2%, preferably between 2% and 45%, more preferably between 3% and 10%, of the length of the fusible element. In this context, it is also understood that the lengths of the end regions may differ from one another. The central region may have a shape and / or configuration different from the outer regions.

[0033] The fusible element can also be designed as an elongated wire.

[0034] In particular, the at least one fixing means can be regarded as a further (auxiliary) cap, which can be plugged onto the respective end face of the insulating body.

[0035] In a particularly preferred embodiment, two fixing means are provided. Each fixing means can be assigned to an end face of the insulating body and thus also to an outer contact cap. The fixing means can be identical or different from one another. Particularly preferably, both end regions of the fusible element are each fixed in one fixing means. Thus, the fixing means can also be assigned to the end regions of the fusible element.

[0036] In addition, the fixing means can be arranged at least partially in the insulating body and / or outside the insulating body.

[0037] It is understood that the two fixing means do not have to be directly connected to one another. In particular, the fixing means can be spaced apart from one another when inserted. Furthermore, the fixing means can each delimit the cavity of the insulating body. At least one fixing means can protrude into the cavity of the insulating body.

[0038] In particular, two separately handleable, preferably identical, fixing means can be provided.

[0039] As explained above, the two fixing means can each be assigned to an end region of the insulating body, preferably to an end end region of the insulating body. Furthermore, the insulating body can be tubular, preferably either cylindrical or cuboid-shaped, and in particular have open end faces.

[0040] The fixing means can rest on the end faces of the insulating body. The fixing means can have an inner region that extends into the interior of the insulating body and an outer region for contact with the insulating body's sheath.

[0041] In particular, the at least one fixing means is designed such that the fusible element is clamped and / or fixed at least in one end region, preferably in the front end region. Clamping is ensured in particular by a clamping connection in the fixing means. Particularly preferably, the fusible element is fixed with its two end regions by a fixing means assigned to the end region for a positionally stable arrangement. The region of the fusible element fixed, in particular clamped, in the fixing means is also referred to below as the "fixing point."

[0042] In this context, it is understood that a section of the fusible link may also extend beyond the fixing point. Therefore, the fixing point does not necessarily have to form the outer end of the fusible link.

[0043] Consequently, the fusible element, in particular an elongated one, can be fixed in the area of ​​its ends or in the end areas.

[0044] The fusible element is at least substantially taut and / or tight, particularly between the fixing points.

[0045] Furthermore, the length of the fusible element can exceed the length of the insulating body or at least be substantially equal to it. Alternatively, the fusible element can be shorter than the length of the insulating body. This is the case if the fixing point is located within the insulating body or protrudes into it.

[0046] Preferably, the fusible element can be arranged entirely within the insulating body and extends over the entire length of the insulating body. The fusible element can also protrude beyond at least one end face of the insulating body. The arrangement of the fusible element in the insulating body or the fixing location can be adapted, in particular, to the desired electrical contact with the outer contact caps, preferably to simplify the manufacturing process.

[0047] Preferably, the at least one fixing means is completely covered by the respective associated outer contact cap. Complete covering is understood in particular to mean that both the area of ​​the fixing means adjacent to the end face of the insulating body and the area of ​​the fixing means adjacent to the outer surface of the insulating body are surrounded by the outer contact cap, so that—viewed from the outside—the fixing means is preferably at least substantially completely covered by the outer contact cap.

[0048] Accordingly, the outer contact cap can also protect the fuse holder from external influences. Furthermore, the fuse can be contacted via the outer contact caps as usual, with the fuse holders—not accessible from the outside—providing a stable arrangement of the fuse element.

[0049] It is particularly preferred that the fixing means is electrically connected to the fusible conductor.

[0050] In a particularly preferred embodiment, it is provided that the fixing means comprises a jacket for arrangement on the jacket surface of the insulating body.

[0051] According to the invention, the fixing means comprises a base side for at least partial support on the end face of the insulating body. Both the casing of the fixing means and the base side of the fixing means can form and / or comprise the outer region of the fixing means. They can therefore be arranged outside the insulating body and, in particular, not protrude into the cavity of the insulating body. The casing of the fixing means can directly border and / or abut the casing surface of the insulating body when inserted. It can also be provided that a distance is provided between the casing of the fixing means and the casing surface of the insulating body. The outer contact cap can therefore be spaced from the insulating body in the region of the casing of the fixing means by the wall thickness of the casing of the fixing means - with the fixing means being completely covered by the outer contact caps.

[0052] In a further preferred embodiment, the fixing means can be designed as a plug. In particular, the fixing means is designed as a plug with at least two lamellae. Furthermore, the plug can comprise and / or consist of an elastic material.

[0053] It is particularly preferred that the fixing means electrically connect the fusible element to the outer contact cap. In particular, this eliminates the need for an additional contact means that would otherwise be required to contact the fusible element.

[0054] The base of the fixing means comprises an opening and / or a recess. In particular, the opening can delimit the cavity of the insulating body and / or open into the cavity of the insulating body. Thus, the opening of the fixing means can preferably merge directly into the cavity of the insulating body. The base of the fixing means can rest on an end face of the insulating body. In further embodiments, it can also be provided that the base of the insulating body preferably protrudes at least partially into the insulating body. The opening can be designed such that a large intervention or access option or a large intervention or access area into the interior or cavity of the insulating body is created. Via this access area, for example, the fusible element can be inserted and arranged relatively easily.Alternatively or additionally, additional components of the fuse, such as an extinguishing agent filling, can be inserted into the cavity of the insulating body via this larger access area, which is provided by the opening. These components can thus be inserted into the insulating body even after the fixing agent has been applied to the insulating body, particularly without complex adjustment.

[0055] The opening can be formed as a single piece or in multiple parts. For example, the opening can also be separated by additional components. Ultimately, the opening represents an opening area.

[0056] According to the invention, at least one projection protrudes into the opening from the base of the fixing means for fixing and / or supporting the fusible element. The projection can be web-shaped and / or elongated. In particular, the projection is not formed circumferentially around the opening of the fixing means, but rather extends only in a partial region from the edge of the opening of the fixing means into the opening of the fixing means.

[0057] The projection extending into the opening of the insulating body allows for a defined arrangement and specification of the position of the fusible element. The projection thus makes it easy to ensure a stable position of the fusible element. In particular, the projection is arranged in such a way that the fusible element can be inserted into the cavity of the insulating body, preferably in a centered manner.

[0058] The projection preferably does not span the entire width or diameter of the opening of the fixing means, but rather extends over at least 10%, preferably between 15 and 90%, more preferably between 20 and 50%, of the maximum diameter of the opening of the fixing means. Finally, the length of the projection is such that the fusible conductor is arranged at least substantially centered in the opening area of ​​the insulating body.

[0059] Preferably, the fusible element is fixed to the projection by frictional engagement, force-locking, and / or material bonding. In particular, the fusible element can be clamped to the projection. The projection thus ensures that the fixing point of the fusible element is predetermined, which is located in the region of the projection.

[0060] According to the invention, the projection has at least two bent legs, preferably arranged laterally on the projection. The legs can protrude from the projection when the fusible element is not fixed. The legs can also be of identical construction and connected to the projection by opposing end faces. The legs can also be formed integrally with the projection. According to the invention, the fusible element is fixed to the projection by means of the legs, namely enclosed, in particular clamped, between the projection and the legs. The legs enable the fusible element to be fixed or connected to the projection in a cost-effective and secure manner.

[0061] In addition to the legs, another means, such as solder, can be provided to connect the fusible link to the projection. The legs then further support the secure fixation of the fusible link to the projection.

[0062] According to the invention, the bent legs lie on top of one another and / or are arranged one above the other when the fuse is in use. Preferably, the fuse element can be crimped, riveted, and / or integrally connected, in particular soldered, to the legs of the projection. This allows for additional secure fixation of the fuse element.

[0063] The legs can be used, in particular, for the positive and / or frictional arrangement of the fusible element on the projection. In particular, the fusible element or the end region of the fusible element can be clamped and / or crimped between the legs of the projection. For this purpose, it can be provided that, when the fusible element is not clamped in, the legs protrude from the long sides of the insulating body, for example at a 90° angle. Ultimately, the legs and the projection form a U-shape when viewed in cross-section. The end region of the fusible element can then be placed on the projection between the legs. The legs can then be angled or bent so that crimping can take place. Crimping allows the fusible element to be securely fixed to the projection. In the final assembled state, the legs of the projection can thus be arranged on top of one another or one above the other.

[0064] Alternatively or additionally, the fusible element can be welded to the projection. Welding ensures a materially bonded connection, which is preferably inseparable or non-removable, between the fusible element and the projection. Furthermore, the welding can also be designed to ensure secure contact between the fusible element and the fixing means and / or the outer contact cap.

[0065] Furthermore, in a further preferred embodiment, the fusible element is connected to the projection via solder and / or is glued to the projection, preferably via an electrically conductive adhesive. Finally, the projection can serve to arrange and fix the end region of the fusible element.

[0066] Furthermore, the fixing means can have at least one holding means on the base side. The holding means can be elongated and / or web-shaped. In addition, the holding means can be connected to the projection to stabilize the projection. The projection can thus be designed to be permanently stable even after the fusible element has been arranged. Alternatively or additionally, it can be provided that the holding means protrudes into the opening and / or bridges the opening. Thus, the opening can be divided, for example, by the holding means. The holding means itself can have at least one recess and / or through-opening. This serves, for example, to enlarge the opening area and / or to save material, preferably for a resource-efficient design of the fuse.

[0067] The fusible element can in particular be guided into the cavity of the insulating body via the holding means. It can thus be provided that the fixing point of the fusible element is located in or on the projection and that the fusible element is guided over the fixing means after the fixing point before the fusible element is bent or angled into the cavity. The holding means and the projection can in particular be aligned flatly with one another or at least substantially in the same plane. For example, the holding means as well as the projection can run at least substantially parallel to or along the plane spanned by the end face of the insulating body. The holding means thus contributes to the further positionally stable arrangement of the fusible element and also enables simplified guidance into the cavity of the insulating body.

[0068] The holding means may have at least one elongated slot, which is particularly designed as a recess or through-hole. The slot runs particularly centrally along the holding means and preferably serves to save material or to enlarge the insertion area.

[0069] The holding means preferably has a guide leg which projects into the insulating body and points away from the base side for guiding the fusible element. In particular, the fusible element can be bent over the guide leg into the cavity of the insulating body. The guide leg can in particular be arranged centrally on the holding means and preferably extend over at least 10%, preferably at least 20%, more preferably between 10 and 70%, of the width of the holding means and / or the maximum diameter of the opening. Finally, the guide leg can in particular be designed such that there is no sharp angle or the like, so that damage to the fusible element can be at least essentially reliably avoided. Furthermore, the positionally stable arrangement of the fusible element is further improved by the guide leg, since displacement of the fusible element by the guide leg can be significantly reduced.Ultimately, the guide leg can also be functionally viewed as a tongue, which serves to protect the fusible element during handling and use, or during the manufacture of the fuse. This prevents cracks and damage to the fusible element when bending from the projection of the fixing element where the fixing point is located.

[0070] As previously explained, the fixing means can be at least substantially identical in design. An identical design offers significant advantages in terms of manufacturing and production, as two different versions of the fixing means do not need to be kept in stock for the respective intended arrangement on the end face of the insulating body. This avoids errors in the production process. For the same reason, the identical design of the outer contact caps is also particularly advantageous.

[0071] In a particularly preferred embodiment, the fixing means is designed such that the casing of the fixing means, without a contact cap in place, protrudes at least partially at the end, i.e., at its free edge, from the outside of the insulating body, in particular from the outside of the casing surface of the insulating body. In particular, it is understood that a further section or part of the fixing means can border and / or bear at least substantially flush against the outside of the insulating body, preferably against the casing surface of the insulating body, wherein a further part or a further section of the fixing means can be angled relative to the casing surface of the insulating body—at least in the preassembled state without an external contact cap in place.

[0072] The angled section of the fixing means, which can preferably be configured to be circumferential, serves in particular to improve the frictional arrangement of the fixing means on the insulating body. Alternatively or additionally, it can be provided that the angled part serves to engage behind the outer contact cap. For example, the outer contact cap can have means that can ensure that the fixing means engages behind it. For example, the outer cap can have corresponding hooks for engaging behind the angled or protruding part of the fixing means. Ultimately, the protruding or angled section of the fixing means ensures simplified attachment of the outer contact cap. In further embodiments, the outer contact cap can be attached such that it at least partially presses the angled section of the fixing means against the outer surface of the insulating body.

[0073] Preferably, the fixing means is frictionally and / or materially connected to the insulating body, preferably through the outer contact cap. In particular, the fixing means is also detachable from the insulating body. In further embodiments, a permanent connection between the fixing means and the insulating body can also be provided.

[0074] The fixing means can, for example, protrude into the insulating body at least partially with its base side, preferably only through the guide leg. The remaining part of the fixing means can be arranged outside the insulating body, for example, resting on the end face of the insulating body and on the outer surface of the insulating body and / or adjacent to the respective surfaces. The fixing of the fusible element, preferably to the projection, can accordingly be carried out either inside or outside the insulating body via the fixing means—that is, the fixing point can be inside or outside the insulating body.

[0075] In a further preferred embodiment, the contact cap is connected to the fixing means and / or the insulating body in a frictionally engaged and / or positively engaged and / or materially bonded manner. In particular, the outer contact cap is arranged in such a way that electrical contact with the fusible element can be ensured. The fusible element can be electrically connected to the fixing means, but this is not required. Further contacting aids, such as an electrical connecting means, in particular a soldered connection or the like, can also be provided for contacting the fusible element.

[0076] Preferably, the contact cap is connected to the fixing means and / or the insulating body by frictional engagement, positive engagement, and / or material engagement. Finally, the contact cap can be arranged such that it preferably completely covers the respective fixing means and enables external contact with the fusible element arranged inside the insulating body.

[0077] The opening of the fixing means can in particular extend over at least 50%, preferably at least 70%, more preferably at least 85%, of the area of ​​the opening of the cavity of the insulating body, in particular the maximum cross-sectional area of ​​the cavity of the insulating body, wherein, preferably, the cross section runs parallel to the end face of the insulating body.

[0078] In particular, the fixing means and / or the outer contact cap can comprise and / or consist of an electrically conductive material, in particular metal. Alternatively or additionally, an elastic plastic material and / or a non-electrically conductive material can be used for the fixing means.

[0079] Furthermore, the cavity of the insulating body can be at least partially, preferably completely, filled with an extinguishing agent. The extinguishing agent can be introduced, in particular, through the opening in the fixing means. The large opening area makes it relatively easy to introduce the extinguishing agent into the insulating body.

[0080] In addition, the outer contact caps can be firmly bonded to the insulating body, preferably via a connecting means. For example, the outer contact caps can be connected to the insulating body via a solder joint.

[0081] In addition, the insulating body can comprise and / or consist of an electrically insulating material, preferably glass and / or ceramic.

[0082] The fusible element can be made of and / or comprised of an electrically conductive material, preferably metal. Materials used for the fusible element include, in particular, copper, nickel, steel, gold, and / or silver. Furthermore, the fusible element can also be made of a metal alloy, for example, a silver and / or copper alloy.

[0083] The fusible element can be designed as a fusible element wire and / or as a fusible element strip. Furthermore, the fusible element can have an at least substantially circular and / or elliptical or at least substantially rectangular cross-section.

[0084] In addition, the fuse element can be provided with constrictions that allow for faster or slower overload and / or short-circuit response. The constrictions can, in particular, be designed as cross-sectional constrictions.

[0085] The extinguishing agent may, in particular, comprise extinguishing sand with a preferably defined grain size distribution, which is preferably suitable for use in fire containment applications. In addition, colored sand, sand and / or ceramic chips, and / or glass beads can also be used as extinguishing agents.

[0086] In a further preferred embodiment, the respective end region of the fusible element is electrically connected to the respective outer contact cap via an electrically conductive connecting means. In particular, the connecting means is arranged at least partially in and / or on the fixing means. Preferably, the connecting means does not "creep" over the fixing means into the interior of the insulating body.

[0087] The connecting means can also be designed to electrically contact the fusible element and preferably connect it to the outer contact cap. Thus, the connecting means can be designed as a contact means. The connecting means can preferably be designed as a solder connection, in particular a low-temperature solder, and / or as an electrically conductive adhesive, in particular a lead-free one.

[0088] The connecting means can be designed to connect the outer contact cap to the fixing means and / or the insulating body, preferably in a materially bonded manner.

[0089] Furthermore, the aforementioned object is at least substantially achieved by a method for producing a fuse, in particular an SMD fuse and / or a device protection fuse, according to one of the previously explained embodiments. The method comprises the following method steps, which are preferably carried out in the specified order (one after the other): A) Providing an insulating body, a fusible element, at least one fixing means and external contact caps; B) Placing the fixing means onto the end face of the insulating body; C) Inserting the fusible element into the insulating body by arranging it on the fixing means(s) and, preferably by frictional and / or material bonding, fixing the fusible element to the respective fixing means, so that the fusible element is arranged in a positionally stable manner in the insulating body; D) Optionally: Crimping the fusible element to the fixing means(s); E) Placing the external contact caps onto the insulating body and at least partially onto the fixing means(s), so that the respective fixing means is at least partially slipped over by the associated external contact cap.

[0090] In connection with the method according to the invention, reference may be made to the aforementioned preferred embodiments and advantages of the fuse, which apply equally to the method according to the invention, in particular without the need for further explicit mention. At the same time, the method features specified below also apply equally to the previously explained fuse according to the invention. Accordingly, to avoid unnecessary repetition, reference is made to the aforementioned explanations.

[0091] By placing the outer contact caps on, an electrical connection of the outer contact caps with the fixed fusible element is achieved, which takes place in particular after or with step E).

[0092] In another particularly preferred embodiment, the insulating body is filled with an extinguishing agent, in particular extinguishing sand, granules, and / or glass beads, preferably after step B) and / or C) and / or before performing step D) and / or E), preferably via the opening of the fixing agent. The enlarged or large opening of the fixing agent makes it comparatively easy to introduce the extinguishing agent into the insulating body—both with the fusible element already inserted into the insulating body and afterward.

[0093] The insertion of the fusible element in step C) can be carried out in such a way that, after carrying out step C) and in particular after carrying out the optional step B), the fusible element is angled into the interior of the hollow body via a holding means, preferably guided via a guide leg. Due to the projection of the fixing means and in particular by guiding it along the upper side of the holding means and the guide leg, it is possible to adhere to a defined specification for the arrangement of the fusible element in a comparatively simple manner, so that the fusible element can preferably be arranged centrally in the insulating body. Consequently, production errors during manufacture of the fuse can be avoided, in particular by at least substantially reliably preventing the fusible element from being applied to the inner wall of the insulating body.According to the invention, the fusible element is introduced into the insulating body in such a way that an at least substantially tight and / or positionally stable arrangement of the fusible element can be ensured.

[0094] In particular, it is provided that the insulating body is not completely filled and / or filled with the extinguishing agent. Preferably, the insulating body is at least partially filled and / or filled with the extinguishing agent.

[0095] Preferably, the fusible element is inserted into the insulating body using a tool, preferably a feed needle. In particular, the fusible element can be inserted over the fixing means using the tool and fixed to the fixing means.

[0096] Preferably, the fusible conductor is first introduced via a first fixing means and guided with the tool, preferably the feed needle, to the further or opposite fixing means and in particular fixed therein, in particular frictionally and / or materially.

[0097] After arranging the fusible element in the insulating body and fixing the fusible element, preferably in a positionally stable manner, the fusible element can be electrically connected to the outer contact cap, preferably by introducing an electrically conductive adhesive as a connecting means between the fusible element and the outer contact cap.

[0098] In particular, the connecting agent, preferably the electrically conductive adhesive, can be applied first, preferably so that contact is made with the fusible element. The outer contact cap can then be attached, so that, in particular, a material bond can be achieved between the outer contact cap and the insulating body and / or fixing agent.

[0099] Furthermore, the outer contact cap can be placed over the insulating body, preferably over the fixing means, by pressing it over, so that in particular the connecting effect by means of a material bond between the outer contact cap and the insulating body can be dispensed with.

[0100] In particular, the fusible element can be arranged at least substantially centrally in the insulating body, which is particularly advantageous for the behavior of the fuse.

[0101] In particular, the manufacturing method according to the invention allows the use of a low-temperature solder as the connecting agent, since the connecting agent can preferably no longer penetrate into the entire construction space in the liquid state, in particular during reflow.

[0102] In a further preferred embodiment, it can be provided that in method step C) the at least two legs projecting laterally from the projection are bent such that the legs lie on top of one another and / or one above the other and the fusible element is fixed between the legs and the projection, in particular wherein the legs are crimped and / or in particular wherein the fusible element and the legs are integrally connected to one another, in particular soldered. Such a fixing of the fusible element represents a secure, permanent and stable contact of the fusible element in the fuse. Furthermore, this makes it possible to dispense with soldering if required, although this can of course also be provided additionally.

[0103] Furthermore, it is understood that the aforementioned intervals and range limits include any intermediate intervals and individual values ​​and are to be regarded as disclosed as essential to the invention, even if these intermediate intervals and individual values ​​are not specifically stated.

[0104] It shows: Fig. 1 a perspective view of a schematically illustrated fuse according to the invention, Fig. 2 a perspective view of the Fig. 1 schematically shown fuse without outer contact caps in a first state, Fig. 3 a sectional view of the Fig. 2 shown components, Fig. 4 a perspective view of the Fig. 1 schematically shown fuse without outer contact caps in a second state, Fig. 5 a sectional view of the Fig. 4shown components, Fig. 6 a schematic perspective view of a further embodiment of a fuse according to the invention without outer contact caps in a first state, Fig. 7 a sectional view of the in Fig. 6 shown components, Fig. 8 a schematic perspective view of one of the Fig. 6 shown fuse without outer contact caps in a second state, Fig. 9 a sectional view of the Fig. 8 shown components, Fig. 10 a schematic perspective view of a further embodiment of a fuse according to the invention without outer contact caps in a first state, Fig. 11 a sectional view of the in Fig. 10 shown components, Fig. 12 a schematic perspective view of the Fig. 10 shown fuse without outer contact caps in a second state, Fig. 13 a sectional view of the Fig. 12shown components, Fig. 14 a representation of a schematically illustrated method sequence according to the invention for producing a fuse and Fig. 15 a schematic representation of a fusible element.

[0105] Fig. 1 shows a schematic perspective view of a fuse 1. The fuse 1 can be used in particular as an SMD fuse or device protection fuse.

[0106] In the following, a fuse 1 is understood to mean, in particular, a fuse link that can be inserted into a fuse holder (not shown). However, it is understood that the following explanations apply in particular to the fuse link.

[0107] The fuse holder can have a fuse base, such as a socket, and a fuse link carrier, such as a screw or bayonet cap. The fuse base can be installed in a device to be protected. The fuse link carrier can accommodate the fuse link or fuse 1, thus enabling easy replacement.

[0108] In the case of an SMD fuse 1, it can also be provided that the fuse 1 can be permanently connected to a circuit board not shown in detail.

[0109] Fig. 1 shows that the fuse 1 has an insulating body 2.

[0110] The insulating body 2 has an at least substantially cuboidal basic structure, as the Fig. 1 schematically shows. Alternatively or additionally, at least substantially cylindrical or geometrically differently shaped insulating bodies 2 may also be provided.

[0111] InThe insulating body 2 is provided with a fusible element 3, as shown Fig. 3 schematically. The fusible element 3 is arranged and / or fastened within, preferably in the central region of, the insulating body 2, preferably at least substantially centered.

[0112] The fuse 1 further comprises outer contact caps 4, as schematically shown in the Fig. 1 The outer contact caps 4 are electrically connected to the fusible element 3. Furthermore, the respective outer contact cap 4 is placed on the insulating body 2, in particular on the end faces 5 and 6 of the insulating body 2, preferably by pressing.

[0113] The insulating body 2 comprises end faces 5, 6 and a lateral surface 7. The end faces 5, 6 of the insulating body 2 are in particular designed to be at least substantially open or open.

[0114] Fig. 2shows that the fusible conductor 3 is fixed by means of at least one fixing means 8, so that the fusible conductor 3 is arranged in a stable position, preferably at least substantially centered, in the insulating body 2 via the fixing means 8.

[0115] Finally, the fusible element 3 is arranged in a stable position in the insulating body 2 by means of at least one fixing means 8. The fixing means 8 is placed on the end face of the insulating body 2, as can be seen schematically from the Fig. 2 and 3 emerges.

[0116] Fig. 1 shows that the fixing agent 8 at least partially - in the Fig. 1 illustrated embodiment completely - is covered by the associated outer contact cap 4. Fig. 1 shows that the fixing means 8 is in any case provided to be pulled over in such a way that the fixing means 8 is covered or covered on the outside by the contact cap 4 in the pulled over area.

[0117] Fig. 3shows that the fixing means 8 itself covers the insulating body 2 in the end areas of the insulating body 2. In the Fig. 3 In the embodiment shown, it is provided that the fixing means 8 functions as an auxiliary cap, which is placed on the respective end face 5, 6 of the insulating body 2. In the Fig. 3 In the embodiment shown, the fixing means 8 does not comprise any region or section that projects into the insulating body 2. In further embodiments, as also shown, for example, in Fig. 11 As shown, a region or section of the fixing means 8 protrudes into the insulating body 2. However, the fixing means 8 overlaps the insulating body 2 on the outside, preferably on all sides.

[0118] The fusible conductor 3 can be connected to the fixing means 8 by frictional engagement, positive engagement and / or material engagement. Fig. 5In the embodiment shown, the fusible element is frictionally connected to the fixing means 8 and in particular clamped in corresponding clamping means.

[0119] The Fig. 2 and 3 show a pre-assembled state of the fuse 1, in which the fusible element 3 is not yet permanently connected to the fixing means 8. The Fig. 4 and 5 , however, show the connected state. This differs in that the crimping has already been carried out, as explained below. The same difference also applies to the Figs. 6 and 7 , which show the pre-assembled state of the fuse, with the corresponding Figs. 8 and 9 illustrate the "final state" or the assembly state of the fixing device 8. The same applies to the Figs. 10 and 11 in which the fuse element is not yet crimped with the fixing agent 8. The Figs. 12 and 13 show the crimped state of the Figs. 10 and 11 shown fixative 8.

[0120] The Fig. 3, 5 , 7 , 9 and 11 clarify that two fixing means 8 are provided, which are at least substantially identical in construction to each other. Fig. 1 It is shown that two identically constructed outer contact caps 4 are provided.

[0121] Each fixing means 8 can be assigned to a front end region of the insulating body 2 and an outer contact cap 4.

[0122] What is not shown is that it can be provided that the fusible conductor 3 can be connected to the fixing means 8, for example in a materially bonded or form-fitting manner.

[0123] The fusible element 3 comprises a central region 9, which is enclosed by the end regions 10, 11. The central region 9 is located—when the fusible element 3 is inserted—inside the insulating body 2. The end regions 10, 11 of the fusible element 3 can have the fixing point.

[0124] In this context, it is understood that the end regions 10, 11 do not necessarily have to be fixed with their outer ends, but ultimately form an outer region of the fusible element 3.

[0125] Accordingly, the fusible conductor 3 is arranged, held or fixed in the region of at least one end 10, 11 in at least one fixing means 8.

[0126] The fusible conductor 3, which has an elongated shape, can be designed as a fusible wire or fusible band, as is the case with Fig. 15 schematically.

[0127] Not shown is that the fusible element 3 can be arranged on and / or at a carrier means or carrier material, in particular applied and / or wound. At least one glass fiber and / or a glass fiber core can be provided as the carrier means. The carrier means can be fixed together with the fusible element 3 in the fixing means 8, at least frictionally. The carrier means can extend partially or completely over the length 12 of the fusible element 3. In the illustrated embodiments, it is shown that the length 12 of the fusible element 3 (in the "extended" or unbent state) exceeds the length 13 of the insulating body 2.

[0128] In further embodiments, the length 12 of the fusible conductor 3 can be less than or equal to the length 13 of the insulating body 2.

[0129] Furthermore, it is understood that the fusible element 3, when clamped or clamped in the fixing means 8, can also protrude beyond the fixed points or the fixing point or be angled relative to it. Accordingly, the fixing point is located in the respective end region 10, 11.

[0130] The fusible conductor 3 extends over a cavity 14 of the insulating body 2. The at least one fixing means 8 delimits the cavity 14 at the end faces.

[0131] In the Fig. 7In the exemplary embodiment shown, it is provided that the fixing means 8 is in each case electrically conductively connected to the fusible element 3. In further embodiments, it may be sufficient if the fusible element 3 is electrically contacted to the outer contact caps 4. This is particularly the case if the auxiliary cap or the fixing means 8 is made of an electrically insulating material. However, it is preferred that the fixing means 8 comprises or consists of an electrically conductive material, in particular metal. In this way, simplified contact between the outer contact cap 4 and the fusible element can be enabled via the fixing means 8, since in order to contact the fusible element it is then sufficient to contact the fixing means 8, so that the outer contact cap 4 does not necessarily have to abut directly against the fusible element 3.Further necessary connecting means, such as solder and / or an electrically conductive adhesive, for contacting the fusible element 3 can also be omitted. In principle, however, it can also be provided that the outer contact cap 4 is electrically connected to the fusible element 3 via a connecting means—for example, a solder and / or an electrically conductive adhesive.

[0132] Fig. 5 shows that the fixing means 8 has a casing 15, which is intended for arrangement on the casing surface 7 of the insulating body 2. The casing 15 does not adjoin the interior of the insulating body 2, but rather adjoins the outer surface of the casing 7 of the insulating body 2. For this purpose, the casing has four casing sides arranged at right angles to one another. In addition, Fig. 5that the fixing means 8 comprises a base or end face 16 which is provided for at least partial support on the respective end face 5, 6 of the insulating body 2.

[0133] The base side 16 can be designed such that it projects into the interior of the insulating body 2. In Fig. 5 However, it is provided that the base side 16 does not protrude into the interior of the insulating body 2, but merely borders on or limits the cavity 14 of the insulating body 2. In the case of the Fig. 13 In the embodiment shown, however, it is provided that the base side 16 projects with a section into the cavity 14 (and thus into the insulating body 2).

[0134] In Fig. 5 It is further shown that the base side 16 of the fixing means 8 comprises an opening 17. The opening 17 is designed in particular as a breakthrough in the base side 16. The opening 17 can be formed in one piece or in several pieces. Fig. 8 For example, a multi-part design of the opening 17 is shown. Finally, additional components of the fuse 1, such as an extinguishing agent filling, can be introduced into the insulating body 2 through the opening 17. According to the invention, it is possible to provide a particularly large area for the opening 17. The opening 17 can open into the cavity 14 of the insulating body 2 and / or delimit it.

[0135] In Fig. 4 It is shown that at least one projection 18 projects into the opening 17 or is arranged in the opening 17. The projection 18 is associated with the base side 16 of the fixing means 8. In the Fig. 4In the exemplary embodiment shown, the projection 18 is web-shaped and / or elongated. The projection 18 does not completely surround the edge of the opening 17. The length of the projection 18 can in particular be between 10% and 80%, preferably between 15% and 50%, of the maximum opening width of the opening 17. Ultimately, the projection 18 projects from the surrounding material of the base side 16 into the region of the opening 17. The fusible element 3 can be guided into the interior of the insulating body 2 via the projection 18. The length of the projection 18 can also specify how far the fusible element 3 is guided into the interior. Accordingly, it is particularly advantageous if the projection 18 projects at least essentially into the opening 17 in such a way that a substantially centered arrangement of the fusible element 3 in the insulating body 2 can be ensured.

[0136] The fixing point of the fusible element 3 can be provided in particular on or on the projection 18.

[0137] Accordingly, the fusible element 3 can be fixed to the projection 18 by frictional engagement, force-locking and / or material engagement, preferably clamped. Fig. 5 In the embodiment shown, it is provided that the fusible element 3 is clamped with its end regions 10, 11 in or on the projection 18.

[0138] In the illustrated embodiments, the projection 18 is provided with legs 19. Finally, two legs 19 arranged on opposite sides of the projection are provided in the illustrated embodiments.

[0139] Furthermore, in the illustrated embodiments, three different variants of the fixing means 8 are shown. Fig. 2 and 3 , 6 and 7and 10 and 11 each show a first state in which a pre-assembled state is shown, wherein in this state the legs 19 have not yet been bent. To clamp the fuse element 3, it can then be provided that the legs 19 are bent in such a way that the fuse element 3 is crimped to the projection 18. This is shown in the corresponding Fig. 4 and 5 ; 8 and 9 ; 12 and 13 In these illustrations, the legs 19 are arranged one above the other. Thus, the fusible element 3 is firmly connected to the projection 18 at its end regions 10, 11.

[0140] The legs 19 protrude laterally from the projection 18 and are arranged with their end faces laterally opposite one another on the projection 18.

[0141] In particular, the fusible element 3 is fixed to the projection 18 by means of the legs 19. The fusible element 3 is further enclosed, in particular clamped, between the projection 18 and the legs 19. In further embodiments, the fusible element 3 can be riveted and / or integrally connected, in particular soldered, to the legs 19 of the projection 18.

[0142] What is not shown in detail is that the fusible element 3 can also be welded to the projection 18 and / or connected via solder. It is also not shown that the fusible element 3 can be bonded with an electrically conductive adhesive in further embodiments—possibly additionally.

[0143] The embodiments according to the Figs. 6 and 7 as well as 10 and 11 differ from the one in the Fig. 2 and 3illustrated embodiment in that a holding means 20 is provided. The holding means 20 is provided on the base side 16. In particular, the holding means 20 serves to stabilize the projection 18. In the Fig. 6 to 13 It is shown that the holding means 20 is directly connected to the projection 18. In particular, the holding means 20 extends over the entire opening width of the opening 17. The holding means 20 can have an elongated slot 21. Furthermore, the holding means 20 can divide the opening 17 or subdivide it into several sections or sub-openings. Finally, the holding means 20 can bridge the opening 17. As shown in the Fig. 6 to 13As shown in the exemplary embodiments shown, the fusible element 3 is guided into the insulating body 2 via the holding means 20. It is provided that the fusible element 3 is fixed to the projection 18 with its fixing point and is then guided into the cavity 14 via the holding means 20. Accordingly, the holding means 20, in addition to stabilizing the projection 18, also serves to guide the fusible element 3 in a defined manner, thus simplifying the positionally stable, in particular centered, arrangement of the fusible element 3 in the insulating body 2.

[0144] In the embodiment according to the Fig. 10 to 13It is provided that the holding means 20 has a guide leg 22. The guide leg 22 can extend over at least 30%, preferably between 30% and 70% of the width of the holding means 20 and / or the opening width of the opening 17. The fusible element 3 can be guided via the guide leg 22 into the interior or the cavity 14 of the insulating body 2. The guide leg 22 can also be arranged on the inside of the insulating body 2 and ultimately protrude into the cavity 14. The guide leg 22 can ensure that damage to the fusible element 3 during bending can be at least substantially prevented. For this purpose, the guide leg 22 can be bent in a rounded manner at the transition to the holding means 20 and thus also ensure a rounded bend of the fusible element 3. Ultimately, there is no sharp angle between the guide leg 22 and the holding means 20.

[0145] In the embodiment according to the Fig. 10 to 13 It is further shown that the fixing means 8 is designed such that the casing 15 of the fixing means 8 without the contact cap 4 attached - i.e. in a pre-assembled state - protrudes at least in some areas, preferably circumferentially, from the outside of the insulating body 2. In addition, the Figs. 10 and 11that the casing 15 of the fixing means 8 comprises a further region 24, in particular a circumferential region 24, which lies flush against the insulating body 2, in particular against the casing surface 7 of the insulating body 2. The flush region 24 of the casing 15 of the fixing means 8 can face the respective end face 5, 6 of the insulating body 2. The angled region 23 of the casing 15 of the insulating body 2 can be designed in particular for improved frictional engagement of the contact cap 4 on the insulating body 2 and / or serves to engage behind the outer contact caps 4, which are placed on the fixing means 8 and on the insulating body 2 - in the respective end face region.

[0146] The fixing means 8 can ultimately be connected to the insulating body 2 in a frictionally engaged and / or materially engaged manner, preferably through the outer contact cap 4.

[0147] The outer contact cap 4, in turn, can be connected to the fixing means 8 and / or the insulating body 2 in a frictionally engaged and / or positively engaged and / or integrally bonded manner. Ultimately, the connection of the individual components is selected depending on the respective embodiment. The application area of ​​the fuse 1 can also influence the connection of the components to one another. In this context, it is understood that individual connection methods can also be combined with one another. For example, in addition to a frictionally engaged connection, a materially bonded connection can also be used, if the application requires it.

[0148] InIn the illustrated embodiments, both the fixing means 8 and the contact cap 4 comprise and / or consist of an electrically conductive material, in particular metal. The outer contact cap 4 can, when fitted, bear directly against the fusible element 3. Alternatively or additionally, it can also be provided that, in the finally assembled state of the fuse 1, a distance exists between the fusible element 3, in particular the end regions 10, 11 of the fusible element 3, and the inside of the outer contact cap 4. The outer contact cap 4 can then be electrically connected to the fusible element 3 either by contacting it via the respective fixing means 8 and / or by introducing a connecting means, for example a conductive adhesive or the like.This is particularly advantageous if the fixing means 8 is made of an electrically insulating material, for example an elastic plastic.

[0149] A solder connection and / or a conductive, in particular lead-free, adhesive can be provided as the connecting means.

[0150] In addition, the connecting means can enable a material connection between the outer contact cap 4 and the fixing means 8 and / or the insulating body 2.

[0151] In particular, the connecting element does not penetrate or creep into the inner area of ​​the insulating body 2.

[0152] Not shown in detail is that the cavity 14 of the insulating body 2 is at least partially filled with an extinguishing agent, in particular extinguishing sand, granules, and / or glass beads. The extinguishing agent can be introduced into the insulating body 2, in particular, via the opening 17.

[0153] The fixing means 8 can be connected to the insulating body 2 in a frictionally engaged, materially engaged, and / or positively engaged manner. Finally, the fixing means 8 is particularly designed to be connected, preferably detachably, to the insulating body 2. Thus, in further embodiments not shown, the fixing means 8 can also be clamped at least partially into the insulating body 2.

[0154] It is not shown in more detail that the insulating body 2 comprises and / or consists of an electrically insulating material, in particular a material comprising a glass and / or ceramic compound.

[0155] Fig. 14 shows a schematic flow of a method for producing a fuse 1. In particular, the method is used to produce a fuse 1 according to one of the previously described embodiments. This can be used to produce an SMD fuse and / or a device protection fuse.

[0156] The Fig. 14 shows the process steps A to E, which are carried out sequentially in the schematic sequence shown. In this context, however, it is understood that a modified sequence of individual process steps—at least in terms of the chronological order—can also be provided.

[0157] In the Fig. 14 In the embodiment shown, in step A, an insulating body 2, a fusible element 3, at least one fixing means 8 and outer contact caps 4 are provided.

[0158] Furthermore, in step B), it is provided that at least one fixing means 8, preferably both fixing means 8, are placed on the end faces 5, 6 of the insulating body 2. Subsequently, in step C), the fusible element 3 is inserted into the insulating body 2 by arranging it on the fixing means 8 and, preferably by frictional and / or material bonding, fixing the fusible element 3 to the fixing means 8, so that the fusible element 3 is arranged in a positionally stable manner in the insulating body 2.

[0159] Step D) is optional. In step D), the fusible element 3 is crimped to the fixing means 8. Crimping can be performed, in particular, by placing the legs 19 of the projection 18 on top of each other and then crimping them together, so that the fusible element 3 is connected by its end regions 10, 11 to the respective projection 18. Thus, the crimping can determine the fixing point of the fusible element 3.

[0160] In step E), the outer contact caps 4 are then placed on the insulating body 2 and, at least in part, on the fixing means 8. The placement takes place in such a way that the fixing means 8 is at least partially covered by the contact cap 4. In particular, the respective fixing means 8 is completely covered and / or covered by the contact cap 4. Thus, the fixing means 8 is no longer accessible from the outside.

[0161] By placing the outer contact caps 4, an electrical contact is created in particular between the fusible element 3 and the outer contact caps 4. The contact can be made, for example, by directly contacting the fusible element 3 or by indirect contacting via the respective fixing means 8.

[0162] Preferably, in method step C), the at least two legs 19 projecting laterally from the projection 18 are bent such that the legs 19 lie on top of one another and / or one above the other, and the fusible element 3 is fixed between the legs 19 and the projection 18. In addition to crimping, it can also be provided that the fusible element 3 and the legs 19 are integrally connected to one another, in particular by soldering.

[0163] After or before inserting the fusible element 3 into the insulating body 2, the insulating body 2 can be filled with an extinguishing agent, preferably extinguishing sand, particularly in the inner central region. Accordingly, the insulating body 2 can be filled, preferably partially, with extinguishing agent, particularly after step C and / or after step D) and / or before performing step E). In addition to extinguishing sand, granules and / or glass beads are also provided in further embodiments. List of reference symbols:

[0164] 1 Fuse 2 Insulating body 3 Fusible element 4 Outer contact cap 5 End face of 2 6 End face of 2 7 Sheath surface of 2 8 Fixing means 9 Central area of ​​3 10 End area of ​​3 11 End area of ​​3 12 Length of 3 13 Length of 2 14 Cavity 15 Sheath of 8 16 Base 17 Opening 18 Projection 19 Leg 20 Holding means 21 Slot 22 Guide leg 23 Angled part of 15 24 Flush part of 15

Claims

1. Fuse (1), namely SMD fuse and / or miniature fuse, with an insulating body (2) having a cavity (14), a fusible conductor (3) arranged in the insulating body (2) and outer contact caps (4) placed on the insulating body (2) on the front side and electrically connected to the fusible conductor (3), the fusible conductor (3) is fixed for positionally stable arrangement in the insulating body (2) by means of at least one fixing means (8) assigned to a contact cap (4), in that the fixing means (8) is placed on the front side of the insulating body (2), and in that the fixing means (8) is put over at least in regions from the assigned contact cap (4), wherein the fixing means (8) has a basic side (16) for bearing at least in regions on the front side (5, 6) of the insulating body (2), wherein the basic side (16) of the fixing means (8) has an opening (17), wherein at least one protrusion (18) projects into the opening (17) from the basic side (16) of the fixing means (8) for fixing and / or supporting the fusible conductor (3), characterized in that the protrusion (18) has at least two bent-over legs (19), arranged laterally on the protrusion (18), and the fusible conductor (3) is fixed on the protrusion (18) by means of the legs (19), namely being enclosed between the protrusion (18) and the legs (19), the bent-over legs (19) lying on top of one another and / or being arranged one above the other.

2. Fuse according to claim 1, characterized in that at least two fixing means (8) are provided.

3. Fuse according to claim 1 or 2, characterized in that the fixing means (8) is completely covered by the assigned contact cap (4).

4. Fuse according to one of the preceding claims, characterized in that the fixing means (8) is electrically connected to the fusible conductor (3).

5. Fuse according to one of the preceding claims, characterized in that the fixing means (8) has a jacket (15) for bearing at least in regions on the sheath surface (7) of the insulating body (2).

6. Fuse according to one of the preceding claims, characterized in that the protrusion is web-shaped and / or elongated.

7. Fuse according to one of the preceding claims, characterized in that the fusible conductor (3) is fixed to the protrusion (18) in a frictionally engaged, force-locking and / or substance-locking manner, preferably clamped, and / or in that the fusible conductor (3) being crimped, riveted and / or materially connected, in particular soldered, to the legs (19) of the protrusion (18), and / or in that the fusible conductor (3) is welded to the protrusion (18) and / or in that the fusible conductor (3) is connected to the protrusion (18) via a solder and / or bonded to the protrusion (18), preferably via an electrically conductive adhesive.

8. Fuse according to one of the preceding claims, characterized in that the fixing means (8) has at least one, in particular web-shaped and / or elongated, holding means (20) on the basic side (16), in particular wherein the holding means (20) is connected to the protrusion (18) for stabilizing the protrusion (18) and / or in particular wherein the holding means (18) projects into the opening (17) and / or bridges the opening (17) and / or in particular wherein the fusible conductor (3) is guided into the insulating body (2) at least in regions via the holding means (3).

9. Fuse according to one of the preceding claims, characterized in that the holding means (20) has at least one elongated slot (21).

10. Fuse according to one of the preceding claims, characterized in that the holding means (20) has a guide leg (22) projecting into the insulating body (2) and pointing away from the basic side (16) for guiding the fusible conductor (3), in particular the fusible conductor (3) being bent over the guide leg (22) into the cavity (14) of the insulating body (2), preferably in a rounded manner.

11. Fuse according to one of the preceding claims, characterized in that the fixing means (8) are designed to be at least substantially identical in construction to one another and / or in that the outer contact caps (4) are designed to be at least substantially identical in construction to one another.

12. Fuse according to one of the preceding claims, characterized in that the fixing means (8) is designed in such a way that the jacket (15) of the fixing means (8), without a contact cap (4) fitted on it, protrudes at its free edge on the end side, at least in regions, with respect to the outside of the insulating body (2).

13. Fuse according to one of the preceding claims, characterized in that the fixing means (8) is connected to the insulating body (2) in a frictionally engaged and / or materially engaged manner, preferably by the contact cap (4).

14. Fuse according to one of the preceding claims, characterized in that the contact cap (4) is connected to the fixing means (8) and / or the insulating body (2) in a frictional and / or positive and / or material-locking manner.

15. Method for producing a fuse (1), namely SMD fuse and / or miniature fuse, according to one of the preceding claims, the method comprising the following method steps, which are preferably carried out in succession: A) providing an insulating body (2), a fusible conductor (3), at least one fixing means (8) and outer contact caps (4); B) placing the fixing means (8) on the front sides (5, 6) of the insulating body (2); C) insertion of the fusible conductor (3) into the insulating body (2) by arrangement on the fixing means (8) and, preferably by frictional and / or material locking, fixing of the fusible conductor (3) on the fixing means (8) so that the fusible conductor (3) is arranged in the insulating body (2) in a positionally stable manner, wherein at least two legs (19) projecting laterally from the protrusion (18) are bent over in such a way that the legs (19) lie upon each other and / or on top of one another and the fusible conductor (3) is fixed between the legs (19) and the protrusion (18); D) optional: crimping of the fusible conductor (3) with the fixing means (8); E) placing the outer contact caps (4) on the insulating body (2) and at least regionally on the fixing means (8), so that each fixing means (8) is put over at least regionally from the contact cap (4).