EP1161786A1 - A strain relief device for electric cables, preferably in an apparatus or terminal box - Google Patents
A strain relief device for electric cables, preferably in an apparatus or terminal boxInfo
- Publication number
- EP1161786A1 EP1161786A1 EP00917536A EP00917536A EP1161786A1 EP 1161786 A1 EP1161786 A1 EP 1161786A1 EP 00917536 A EP00917536 A EP 00917536A EP 00917536 A EP00917536 A EP 00917536A EP 1161786 A1 EP1161786 A1 EP 1161786A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- box
- strain relief
- relieving
- cable
- disk
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/58—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable
- H01R13/5804—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable comprising a separate cable clamping part
- H01R13/5816—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable comprising a separate cable clamping part for cables passing through an aperture in a housing wall, the separate part being captured between cable and contour of aperture
Definitions
- the present invention relates to a strain relief device for electric cables in general and in particular in an apparatus or terminal box comprising a bottom surrounded by sidewalls.
- the strain relief device comprises a load-absorbing relieving member with the aid of which a cable can be clamped against a counter-support, possibly consisting of the bottom of the box or some other fixed component in the box or on another apparatus.
- Strain relief devices in apparatus or terminal boxes usually consist of a bush cap secured at each end to a base by means of screws. Strain relief is achieved by inserting the cable beneath the bush cap between the screws, which are then tightened and clamp the cable to the base, the latter thus constituting a counter-support. In conventional terminal boxes this type of strain relief is placed on the outside of the box which means that it is not easily accessible when the box is recessed in a wall, for instance.
- the use of strain relief devices in the form of bush caps requires the use of tools, e.g. a screwdriver, and entails several work phases consisting of shifting the hold on cable, bush cap, screws and tools when connecting a cable to a terminal block or the like in the box.
- the object of the present invention is to provide a strain relief that is more easily accessible than current strain reliefs, and also to eliminate the need for tools such as screwdrivers, when fitting the strain relief.
- the object is achieved by means of the present invention which relates to a strain relief device for electric cables in general and in particular in an apparatus or terminal box, but which may also have other applications, e.g. apparatus in ge- neral such as computers, printers, copiers and the like, and which comprises a load-absorbing relieving member with the aid of which a cable can be clamped against a counter-support.
- the reliever member is displaceable towards the counter-support in a guide arrangement and can be locked in inserted position against a cable inserted through a cable opening, with the aid of a locking member.
- the relieving member is preferably arranged on the inside of the apparatus or terminal box in direct connection with a cable opening in the wall of the box, and displaceable in guide members constituting a part of the wall of the box.
- the strain relief member may consist of a relieving disk with saw teeth, arranged in the direction of movement of the disk and directed towards the wall of the box, and in engagement with corresponding teeth on the locking member, which in turn consists of a locking tongue forming a part of the wall of the box.
- the locking tongue is provided with a groove directed towards the opening of the box, extending in the direction of movement of the relieving disk and directed towards the latter, whereby the locking tongue can be released from the relieving disk by pressing down a screwdriver, for instance, into the groove and causing the locking tongue to spring outwards from the box so that its teeth are released from engagement with the teeth of the relieving disc, thereby releasing the relieving disk.
- the strain relief device according to the invention is arranged in a terminal box
- the actual relieving member is arranged in one of the corners of the box that is provided with a recessed flat section perpendicular to the bottom of the box and intersecting its sides at an angle of
- strain relief device in this way is so as not to encroach on the interior space of the terminal box or the like, which space is needed for connectors such as a terminal block.
- Figure 1 shows a terminal box, square in shape, seen from the side in a diagonal direction.
- Figure 2 shows the terminal box according to Figure 1 , seen from above towards its open end.
- Figure 3 shows a cross section of the terminal box along the line l-l in Fig
- Figure 4 shows an enlargement of the lower corner of the terminal box shown in Figure 2.
- Figure 5 shows a cross section along the line 11-11 in Figure 4.
- the terminal box illustrated in Figures 1 and 2 has a bottom 1 surrounded by four side walls 2. Two adjacent corners of the box are provided with recessed, flat sections 2.1 that are perpendicular to the bottom 1 and intersect the adjacent sides at an angle of 45°. Each flat section 2.1 extends some way up from the bottom of the box and has a cable opening 2.2 for a cable to be drawn into the box. In Figure 1 the cable opening is shown covered by a plate that can be broken off. This has been removed in Figure 3. A strain relief 3 is arranged inside the box at each cable opening 2.2. One such strain relief 3 is shown in a view towards the inside of a flat section 2.1 in Figure 3 and another strain relief 3 is shown in cross section in the same figure.
- the strain relief 3 comprises a load-absorbing relieving disk 3.1 which is displaceable perpendicularly to the bottom 1 of the terminal box, along guide members 2.3 that form a part of the wall 2 of the box at the flat section 2.1.
- the relieving disk 3.1 is provided with saw teeth 3.2 extending perpendicularly to the direction of movement of the relieving disk 3.1 and being directed towards the flat section 2.1.
- the teeth 3.2 of the relieving disk 3.1 are in engagement with corresponding teeth 2.4 arranged on a resilient locking tongue 2.5 that constitutes a part of the wall in the flat section 2.1 and which is also shown in Figure 1.
- the teeth 3.2 of the relieving disk 3.1 are provided with upwardly facing flat surfaces, whereas the teeth 2.4 of the locking tongue 2.5 are provided with downwardly di- rected flat surfaces, as shown in Figure 5.
- the locking tongue 2.5 springs out and permits the teeth 3.2 of the relieving disk to pass the teeth 2.4 of the tongue since the cooperating teeth only prevent movement of the relieving disk 3.1 in the opposite di- rection.
- the locking tongue 2.5 is first caused to spring out by inserting the tip of a screwdriver, for instance, into a groove 2.6 extending downwardly in the locking tongue 2.5.
- the tongue then springs outwards thereby releasing the teeth 3.2 of the relieving disc 3.1 from the teeth 2.4 of the locking tongue 2.5 so that the relieving disk 3.1 can be pulled up from its abutment with the cable.
- the cable can then be removed from the terminal box.
Landscapes
- Connection Or Junction Boxes (AREA)
- Connections Arranged To Contact A Plurality Of Conductors (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
- Insertion, Bundling And Securing Of Wires For Electric Apparatuses (AREA)
- Insulated Conductors (AREA)
- Communication Cables (AREA)
- Multi-Conductor Connections (AREA)
- Processing Of Terminals (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9900785 | 1999-03-05 | ||
SE9900785A SE513886C2 (en) | 1999-03-05 | 1999-03-05 | Strain relief device for electric cables preferably in an appliance or junction box |
PCT/SE2000/000386 WO2000054383A1 (en) | 1999-03-05 | 2000-02-28 | A strain relief device for electric cables, preferably in an apparatus or terminal box |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1161786A1 true EP1161786A1 (en) | 2001-12-12 |
EP1161786B1 EP1161786B1 (en) | 2008-12-03 |
Family
ID=20414725
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00917536A Expired - Lifetime EP1161786B1 (en) | 1999-03-05 | 2000-02-28 | A strain relief device for electric cables, preferably in an apparatus or terminal box |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP1161786B1 (en) |
AT (1) | ATE416504T1 (en) |
AU (1) | AU3849200A (en) |
DE (1) | DE60040973D1 (en) |
DK (1) | DK1161786T3 (en) |
ES (1) | ES2316360T3 (en) |
PT (1) | PT1161786E (en) |
SE (1) | SE513886C2 (en) |
WO (1) | WO2000054383A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2823914B1 (en) * | 2001-04-18 | 2003-08-15 | Infra Sa | ELECTROMAGNETIC SHIELDING DEVICE FOR ELECTRICAL CONNECTOR |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2616568C2 (en) * | 1976-04-14 | 1984-01-05 | Hilti AG, 9494 Schaan | Pipe or cable clamp |
US5243139A (en) * | 1992-05-26 | 1993-09-07 | Heyco Molded Products, Inc. | Lay in strain relief bushing for variable wire sizes |
BR9403559A (en) * | 1994-09-14 | 1996-09-03 | Amp Do Brasil Conectores Eletr | Protective cover set for use with at least one electrical conductor connected to an electrical connector |
DE19504253C1 (en) * | 1994-10-20 | 1996-04-04 | Hans Simon | Cable clamp |
US5653609A (en) * | 1995-07-28 | 1997-08-05 | The Whitaker Corporation | Strain relief for an electrical connector |
-
1999
- 1999-03-05 SE SE9900785A patent/SE513886C2/en not_active IP Right Cessation
-
2000
- 2000-02-28 DK DK00917536T patent/DK1161786T3/en active
- 2000-02-28 WO PCT/SE2000/000386 patent/WO2000054383A1/en active Application Filing
- 2000-02-28 PT PT00917536T patent/PT1161786E/en unknown
- 2000-02-28 AU AU38492/00A patent/AU3849200A/en not_active Abandoned
- 2000-02-28 DE DE60040973T patent/DE60040973D1/en not_active Expired - Lifetime
- 2000-02-28 EP EP00917536A patent/EP1161786B1/en not_active Expired - Lifetime
- 2000-02-28 AT AT00917536T patent/ATE416504T1/en not_active IP Right Cessation
- 2000-02-28 ES ES00917536T patent/ES2316360T3/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0054383A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE416504T1 (en) | 2008-12-15 |
SE9900785L (en) | 2000-09-06 |
ES2316360T3 (en) | 2009-04-16 |
DK1161786T3 (en) | 2009-05-04 |
DE60040973D1 (en) | 2009-01-15 |
SE9900785D0 (en) | 1999-03-05 |
WO2000054383A1 (en) | 2000-09-14 |
EP1161786B1 (en) | 2008-12-03 |
PT1161786E (en) | 2009-02-16 |
SE513886C2 (en) | 2000-11-20 |
AU3849200A (en) | 2000-09-28 |
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