WO2014071998A1

WO2014071998A1 - Fuse holder for an electrical fuse, fuse apparatus and method

Info

Publication number: WO2014071998A1
Application number: PCT/EP2012/072391
Authority: WO
Inventors: Guido SIGNER; Peter Straub; Jarvis ARNET
Original assignee: Schurter Ag
Priority date: 2012-11-12
Filing date: 2012-11-12
Publication date: 2014-05-15

Abstract

The present invention relates to a fuse holder (1) which has a holding apparatus (12) for accommodating an electrical fuse (2), which can be inserted, together with the electrical fuse (2) to be accommodated, in an electrical circuit (3) and which forms an electrically insulating shock hazard protection means with respect to the electrical fuse (2) to be accommodated in the holding apparatus (12). With this invention, the fuse can be inserted into the holding apparatus and removed therefrom without this posing a hazard. In this case, the fuse holder (1) is constructed from largely identical parts, in particular two housing halves. As a result, a simple design and inexpensive production of the fuse holder (1) are achieved.

Description

FUSE HOLDER FOR AN ELECTRICAL FUSE, FUSE DEVICE AND METHOD

The present invention relates to a fuse holder for an electrical fuse, a corresponding

Securing device and a corresponding method.

Electrical fuses, which power in one

limiting electrical circuit are well known, for example as fuses, which are attached by means of clips on a printed circuit board (PCB).

If contact protection is required when inserting the fuse, an aid in the form of a so-called fuse holder is usually used.

Typically, such a fuse holder consists of a holder for receiving the fuse and a

Isolation, which is an electrically insulating

Protection against contact with the fuse forms. To the

Inserting the fuse in the circuit, the fuse is first pushed into the holder and then the fuse holder is inserted together with the fuse in the circuit. The insulation prevents the fuse from touching.

The object of the present invention is to provide an improved fuse holder. Furthermore, an improved securing device and an improved Specify a method for inserting an electrical fuse.

This object is achieved by a fuse holder with the features of claim 1. A securing device according to the invention and a method according to the invention for inserting an electrical fuse as well as further embodiments according to the invention are described in the following

Claims specified.

The present invention relates to a fuse holder, which comprises a holding device for receiving a

having electrical fuse, which is used together with the male electrical fuse in an electrical circuit and which an electrically insulating contact protection against the in the

Holding device to be recorded electrical fuse forms. In this case, the fuse holder from identical or largely identical parts, in particular two housing halves or a plurality of housing parts constructed. This will be a simple design and a cost-effective

Production of the fuse holder reached. In addition, with this invention, the electrical fuse can be safely used in an electrical circuit and from it

be pulled out.

As a "holding device" is an element or a

Combination of elements called the immediate ones Attach the electrical fuse in the fuse holder. This holding device can

be constructed different ways, for example as a gripping element and / or as a clamping device.

The term "electrical circuit" includes both

mechanical components as well as electrical connections. For example, the electrical circuit as

formed so-called PCB (printed circuit board), which has an insulating support plate with it

arranged electrical conductor tracks comprises. The

However, electrical circuit can also be constructed in a different form, for example as a discrete circuit.

The electrical fuse is used to limit the current in such an electrical circuit, for example by an excessive current flow through the fuse

is interrupted. In particular, this interruption can be achieved by means of a wire which is arranged in the fuse and which melts when the current through the wire exceeds a predetermined value.

The electrical fuse is usually inserted by hand into the circuit and removed if necessary, for example, when replacing a blown fuse. The fuse holder according to the invention is used to ensure protection against contact for the person carrying out said manual activities executes, so the insertion or removal of the fuse. Such protection against contact relates in particular to those cases in which said manual activities are carried out during operation of the electrical circuit and / or in the case of current / voltage-carrying components. This contact protection also includes those cases where no manual activities on the electrical

Backup be made and / or where the

electrical fuse in the electrical circuit remains, for example, during manipulation

adjacent components of the electrical fuse. Furthermore, the contact protection also includes precautionary cases in which there is a risk of contact current / live components.

Said electrically insulating contact protection comprises protection against general, harmful

electrical impacts on the person performing the said manual activities. In particular, this contact protection also includes protection

Sparking blows in which there is no direct contact with live / live components.

For example, this contact protection corresponds to a generally recognized and / or standardized finger protection. The standardized finger protection indicates the degree of protection that a housing has against direct contact with active and / or live / live parts. In particular, the mentioned contact protection corresponds to finger protection in accordance with IP20, DIN EN 60529, VDE 0470-1. The fuse holder is included in the electrical circuit including the fuse received therein and removed in a corresponding manner again from the electrical circuit. Accordingly, the fuse holder is also referred to as a puller or "Fuse Extractor". In addition, the fuse holder remains during the

Operation of the fuse in the electrical circuit and / or the fuse holder is intended for permanent use in the electrical circuit.

Surprisingly, the solution according to the invention allows a cost-effective production and an efficient insertion / removal of the electrical fuse as well as an efficient, convenient and safe handling.

For example, the fuse holder with a

simple injection mold for one-piece components

are manufactured and eliminates the storage of various components. In addition, the existing each

Components are always combined with each other, so that there is a high flexibility, which is particularly advantageous in an assembly of the fuse holder on site, ie at the time of insertion of the fuse in the electrical circuit.

The solution according to the invention can be applied to very different types of fuses. Especially it is in any shapes and sizes, in particular at any diameter and / or any length of a cylindrical design, applicable.

In one embodiment of the inventive

Fuse holder has this an electrically insulating housing, which is the holding device and / or at least one electrically conductive part of the male

electrical fuse largely encloses. As a result, an essentially all-side contact protection is achieved, which is largely independent of the direction of handling of the fuse holder.

Furthermore, this ensures a reliable

Protection against contact even with the fingers slipping off

Fuse holder or in case of incorrect handling of the fuse holder. It also becomes a reliable one

Protection against contact ensured during the entire insertion process. This is especially true for one

Interphase, in which the fuse holder his

final position in the electrical circuit has not yet reached and / or at an electric

conductive part, in particular the fuse, already current / voltage is leading.

In a further embodiment of the stated embodiment, the electrically insulating housing is open on one side and predominantly closed on the other sides, and in particular hood-shaped. This means

"predominantly closed" means a portion of the closed surface greater than 50% of the total surface area, including the closed surfaces plus the areas of the openings. As a result, the housing offers a

Reliable, substantially all-round contact protection and / or the housing in a simple manner over components of the electrical circuit, in particular a fuse socket, be slipped.

In one example, the maximum diameter of the

Openings in the fuse holder according to the invention,

especially with its one-sided opening, less than or equal to 12 mm. As a result, an effective contact protection is achieved, in particular a finger protection according to IP20.

In a further embodiment of the present invention, the individual parts of the fuse holder are formed interlocking, in particular by means of each other

corresponding pin and mortise holes. As a result, a cost-effective production and a simple assembly can be achieved.

In a further embodiment of the present invention, the fuse holder can be used together with the male electrical fuse by means of plug-in connection in an electrical circuit. This will be a

efficient handling, especially an efficient one Inserting and / or removing the fuse holder

reached .

The term "plug connection" means that the

Fuseholder including the fuse contained therein easily inserted through an easily separable connection in the electrical circuit and in

corresponding way can also be removed from this again, namely by simply taking off. In addition, "connector" means that the fuse holder during operation of the fuse permanently in the electrical

Circuit remains and not - as a tool - removed after installation or prior to

Uninstallation is introduced.

In a further embodiment of the fuse holder according to the invention, the latter is designed such that it extends at least partially over a component of the electrical circuit provided for connecting the fuse, in particular via a fuse holder, when the fuse holder is inserted into the electrical circuit. The fuse holder then forms an additional protection against contact with respect to this component, for example against current / live components such as clips and / or electrical connections such as printed conductors. As a result, the insulation in the component, in particular in the fuse socket, and / or reduced on the electrical circuit or completely dispense with an insulation become. Thus, a flexible use without previous insulation work and efficient assembly is achieved.

The term "fuse socket" is a combination of mechanical and electrical connection of

electrical fuse to understand the electrical circuit. For example, the fuse holder is mounted on an insulating support plate and electrically connected to the conductor tracks arranged thereon.

In particular, in a fuse-holder in the form of metallic clips, the mechanical seat through the

Clamping action of the elastic contact surfaces and the

electrical connection given by the electrical conductivity of the metal.

In a further embodiment of the present invention, the fuse holder according to the invention has a

Edge region, which is designed such that this at least a lateral part of a fuse holder intended for securing the fuse

partially largely encloses when the fuse holder is placed over this fuse socket.

In a further embodiment of the inventive fuse holder has this a variety of

Ventilation on and / or this is designed in the form of a cage, so that a good heat dissipation and still IP 20 finger protection is achieved. This will a good air circulation and therefore a good one

Heat dissipation with reliable contact protection (eg IP 20 finger protection) achieved.

In one example, the vents of the

Fuse holder different orientations. As a result, a good air circulation is achieved, largely

regardless of the spatial orientation of the

Fuse holder.

In a further embodiment of the present invention, the identical or largely identical parts are rotatably connected to each other, in particular via at least one rotary joint. As a result, a particularly convenient, efficient and safe handling of the fuse is achieved.

In a further embodiment of the present invention, the holding device and / or in particular the

Actuator made identical or largely

identical parts, in particular of two or more parts, constructed. As a result, these components can be combined with the identical parts of the fuse holder in a simple manner.

In a further embodiment of the present invention, the holding device is designed such that it positions the male electrical fuse in a predetermined position in the housing and / or fixed. This will a precise arrangement and / or orientation of the fuse and thus a good starting point for an efficient and reliable insertion of the fuse in the

reached electrical circuit.

In a further embodiment of the present invention, the fuse holder is designed such that this only together with the electrical fuse from the

electrical circuit is removable. Through this

direct connection of the fuse holder with the electrical fuse will be a reliable

Contact protection achieved both during insertion and / or removal of the fuse and during operation of the fuse.

In a further embodiment of the present invention, the identical or largely identical parts are rotatably connected to each other. As a result, an efficient and / or convenient handling of the fuse holder is achieved.

In one example, the fuse holder comprises at least one, in particular two, hinges, with which the

identical or largely identical parts can be folded to a predominantly closed housing.

Furthermore, the present invention relates to a

in particular a half, a housing for the fuse holder according to the invention. By assembling these parts, the fuse holder on site, ie

be created immediately before the insertion of the electrical fuse, efficiently and conveniently.

Furthermore, the present invention relates to a

Safety device with a fuse holder for inserting an electrical fuse in an electrical circuit and with an inventive

Fuse holder.

In a further embodiment of the mentioned

Securing device, the fuse holder covers the fuse socket at least partially. As a result, the isolation in the fuse socket can be reduced or completely omitted insulation, so that a flexible assembly without previous insulation work, an efficient installation and a low-cost construction is achieved.

In a further embodiment of the above

Safety devices is the fuse socket a metallic socket without insulation and / or as

Clamping device formed, and in particular has at least one, more particularly two, metallic clip. Furthermore, the present invention relates to a method for mounting an electrical fuse in one of the said safety devices, comprising the steps:

- Inserting an electrical fuse in the

Holding device of the fuse holder;

- Positioning the electrical fuse in the

Fuse holder by closing the fuse holder, in particular by joining and / or folding the parts; and inserting the fuse holder together with the

electrical fuse in the electrical circuit.

This achieves efficient and / or convenient handling.

Furthermore, the present invention relates to a method for mounting an electrical fuse in one of the said safety devices, comprising the steps:

- Inserting an electrical fuse in the

Holding device of the fuse holder; - Positioning the electrical fuse in the electrically insulating housing; and

- Inserting the fuse holder together with the

electrical fuse in the electrical circuit.

As a result, a precise arrangement and / or alignment of the fuse and thus a good starting situation for an efficient and reliable insertion of the fuse is achieved in the electrical circuit. In a further embodiment of the inventive method, the positioning of the electrical

Fuse by joining several parts of the electrically insulating housing, in particular two identical

Halves. This achieves simultaneous positioning during assembly.

In a further embodiment of the inventive method, the insertion of the fuse holder comprises the steps:

- placing the fuse holder on the electrical

Circuit; and

- Inserting the electrical fuse in the fuse socket by means of the holding device, which is movable in the

Housing is arranged, and which is displaced in particular by actuating an actuating element.

As a result, a particularly convenient, efficient and safe handling of the fuse is achieved.

Furthermore, the present invention relates to a method for removing an electrical fuse from a

Safety device according to the invention, comprising the steps of: - removing the fuse holder by the electrical

Disconnect the fuse from the fuse holder; - Opening the fuse holder, in particular by separating and / or unfolding the parts; and

- Remove the electrical fuse from the

Fuse holder.

This achieves efficient and / or convenient handling.

Safety device according to the invention, which the

Steps includes:

- Disconnect the electrical fuse from the fuse holder by moving the holder in

Fuse holder, in particular by pulling on the

Actuator; and

- Remove the fuse holder together with the

electrical fuse.

As a result, the electrical fuse before removing the fuse holder of current / live

Insulated components so that a safe removal of the electrical fuse is achieved, especially during operation of the electrical circuit.

Furthermore, the present invention relates to a

Fuse holder, which a holding device for

Receiving an electrical fuse, which together with the male electrical fuse in an electrical circuit can be used and which forms an electrically insulating contact protection against the electrical fuse to be accommodated in the holding device, wherein the fuse holder consists of several,

in particular two, rotatably interconnected housing parts is constructed. This achieves efficient and convenient handling of the fuse holder. In one example, this fuse holder comprises at least one, in particular two, pivot, with which the housing parts can be folded into a predominantly closed housing. More versions of this

Fuse holder are described in the above-mentioned embodiments of the invention.

It is expressly stated that each

Combination of the aforementioned examples and

Embodiments or combinations of combinations may be the subject of a further combination. Only those combinations are excluded that would lead to a contradiction.

Further embodiments of the present invention are explained below with reference to the following figures. Showing:

Fig. 1. a simplified perspective view

an embodiment of the inventive Locking arrangement in disassembled condition with a fuse holder 1;

Fig. 2 is a simplified representation of

Safety arrangement according to Figure 1, but in the assembled state. and

Fig. 3 is a simplified illustration of the

Fuse holder 1 according to FIG. 1, wherein the two housing halves of the fuse holder 1 are connected by hinges 40 together.

The following statements are examples and are not intended to limit the invention in any way.

Fig. 1 shows a simplified perspective view of an embodiment of the inventive

Safety arrangement in disassembled condition. In this case, the fuse arrangement comprises an inventive

Fuse holder 1, an electrical

Fuse 2 and an electrical circuit in the form of a PCB circuit board 3. In this case, the PCB circuit board 3 comprises an insulating support plate arranged thereon conductor tracks (not shown).

The PCB circuit board 3 has a fuse holder in the form of two metallic clips 30, with which the electrical fuse 2 is held during its operation on the PCB circuit board 3. In this case, the electrical fuse 2 is held by the press fit of the clips 30 in position and electrically connected to the interconnects of the PCB circuit board 3.

The fuse holder 1 comprises a two-part, electrically insulating housing, wherein the two parts are formed by the two housing halves 10a and 10b. Each of the housing halves 10a and 10b respectively

Gripping element 12 as a holding device, a plurality of ventilation openings 14, an edge region 16 and a

Actuator 18. (In FIG. 1, only one of the housing halves is provided with reference numerals)

The two housing halves 10a and 10b are each made of electrically insulating material, for example made of a polymer, and are cup-shaped, so that they form a single unit, namely a compact one

electrically insulating housing, can be joined together.

In this example, the two housing halves 10a and 10b are identically constructed to be each other

can be faced and fitted together accurately. In this case, the two housing halves 10a and 10b are formed such that they can interlock, for example by pins and pin holes of the first Housing half 10a of the corresponding reverse arrangement of pins and pin holes of the second housing half 10b face.

To insert the electrical fuse 2 into the clips 30, the electrical fuse 2 is inserted into the gripping element 12, a first housing half, for example, in the housing half 10a, in a first step. In a next step, the second housing half, that is, the housing half 10b, placed on the first housing half and the two housing halves 10a, 10b assembled,

for example, by simply squeezing. In this assembly, the electrical fuse 2 is on both sides of the two gripping elements 12 includes and positioned in a predetermined position. Such a precise arrangement and / or orientation will be optimal

Initial situation for the steps described with reference to FIG. 2 achieved.

FIG. 2 shows a schematically simplified illustration of the fuse arrangement according to FIG. 1, but in FIG

assembled state. In this case, the fuse holder 1, the PCB circuit board 3, the edge region 16 of the housing and the two actuating elements 18 are provided with reference numerals.

The two-part housing of the fuse holder 1, which is formed by the assembled housing halves, is substantially dome-shaped, open on one side to the PCB circuit board 3 and the other on the other. 5

Pages mostly closed. The housing encloses the fuse (not visible) and essentially forms a finger guard according to IP20. As a result, a contact protection against the electrical fuse is ensured, both when inserting the fuse holder 1 and during operation of the fuse in the electrical circuit. 3

In addition, the fuse holder 1 and the housing, by the plurality of ventilation openings 14, a

electrically insulating cage around the fuse enclosed therein (not visible), so that despite air circulation through the ventilation openings an effective contact protection and thus a good heat dissipation is achieved.

The ventilation openings 14 are located in all wall surfaces of the housing, i. both in the upper deck area and in all four side areas. Here are the

Vents 14 different orientations, namely up and to the different sides.

This allows the air through the side

Vent openings 14 enter the housing and exit through the ventilation openings 14 of the upper deck surface of the housing, so that a good air circulation is achieved.

The edge region 16 of the fuse holder 1 or housing is designed such that it protects against contact opposite the arranged on the PCB circuit board 3 clips (barely visible) forms. This contact protection is ensured even with a lateral attack of the housing or upon contact of the housing from above.

To continue the process for inserting the

electrical fuse in the clips is in a further step the fuse holder 1 including the therein

taken fuse placed on the electrical circuit 3. By pressing on the two actuators 18, the electrical fuse is moved inside the housing in the direction of the clips until the fuse snaps into the clips and is reliably held by their clamping action. This results in a situation as shown in Fig. 2.

After inserting the fuse, the fuse holder 1 is connected to the PCB circuit board 3 via the fuse and the gripping members. Thus, the fuse holder 1 only together with the electrical fuse from the

electrical circuit 3 are removed. As a result, a reliable contact protection is achieved, both in

Inserting or removing the fuse as well as during operation of the fuse in the electrical circuit.

Analogously, but in reverse order, the fuse with the help of the fuse holder 1, and in particular by pulling on the actuators 18, are removed from the electrical circuit 3.

Fig. 3 shows a simplified representation of

Fuse holder 1 according to FIG. 1 in the open state.

In this case, the fuse holder 1 comprises - as in Fig. 1 - two housing half, which are not separated but are connected via two pivot joints 40 rotatably connected to each other.

In this case, the hinges 40 act as a hinge, so that these two housing half after the entry of the

electrical fuse by a simple rotational movement about the pivot joints 40 to a predominantly closed

Housing can be folded. To remove the electrical fuse fuse holder 1 can be opened in the reverse manner.

Furthermore, the fuse holder 1 comprises a plate 50 with which the fuse holder 1 can be labeled. For example, this chip 50 may be replaced by the

Folding the fuse holder 1 are fixed in the housing.

Claims

Fuse holder (1) having a holding device (12) for receiving an electrical fuse (2), which together with the male electrical fuse (2) in an electrical

Circuit (3) can be used and which one

electrically insulating contact protection against the male in the holding device (12)

electrical fuse (2) forms,

wherein the fuse holder (1) of identical or substantially identical parts (10a, 10b), in particular two housing halves or a plurality of housing parts, is constructed.

Fuse holder (1) according to claim 1, wherein it comprises an electrically insulating housing (10a, 10b), the holding device (12) and / or at least one electrically conductive part of the male

electrical fuse (2) largely encloses.

Fuse holder (1) according to claim 2, wherein the electrically insulating housing (10a, 10b) open on one side and on the other sides predominantly

is closed, and in particular dome-shaped

is trained.

4. fuse holder (1) according to one of the preceding

Claims, wherein the parts of the fuse holder (1) are formed interlocking, in particular by means of corresponding pins and

Mortises.

Fuse holder (1) according to one of the preceding claims, wherein it has an edge region (16) which is formed such that the edge region (16) via a for connecting the

Secured (2) provided component of the electrical circuit (3), in particular via a fuse holder (30), at least partially extends when the fuse holder (1) is inserted into the electrical circuit (3).

A fuse holder (1) according to any one of the preceding claims, wherein it is a plurality of

Has ventilation openings (14) and / or this is in the form of a cage, so that a good heat dissipation and still IP 20 finger protection is achieved.

Fuse holder (1) according to one of the preceding claims, wherein the identical or largely identical parts (10a, 10b) are rotatably connected to each other, in particular via at least one rotary joint (40).

8. fuse holder (1) according to one of the preceding claims, wherein the holding device (12), and / or in particular the actuating element (18), from

identical or largely identical parts, in particular of two or more parts, is constructed.

9. fuse holder (1) according to one of the preceding

Claims, wherein the holding device (12) is designed such that it receives the

electrical fuse (2) in a predetermined position in the housing (10a, 10b) positioned and / or fixed.

10th part, in particular half, of a housing (10a, 10b) for a fuse holder (1) according to one of

preceding claims.

11. Safety device with a fuse holder

(30) for inserting an electrical fuse (2) in an electrical circuit (3) and with a

Fuse holder (1) according to one of claims 1 to 9.

12. Securing device according to claim 11, wherein the

Fuse holder (1) the fuse holder (30) at least partially covered, so that it forms a contact protection against the fuse holder (30). Method for inserting an electrical fuse (2) into a fuse device according to claim 11 or 12, comprising the steps:

- Inserting an electrical fuse (2) in the holding device (12) of the fuse holder (1);

- Positioning the electrical fuse (2) in the

Fuse holder (1) by closing the

Fuse holder (1), in particular by

Assembling and / or folding the parts (10a, 10b); and

- Inserting the fuse holder (1) together with the electrical fuse (2) in the electrical

Circuit (3).

A method of removing an electrical fuse (2) from a fuse device according to claim 11 or 12, comprising the steps of:

- Remove the fuse holder to the electrical fuse (2) to be separated from the fuse holder (30);

- Opening the fuse holder (1), in particular by separating and / or unfolding of the parts (10a, 10b); and

- Remove the electrical fuse (2) from the

Fuse holder (1).