Electric heating – Heating devices – Tool or instrument
Patent
1999-06-08
2000-11-14
Walberg, Teresa
Electric heating
Heating devices
Tool or instrument
219230, 219238, 228 55, H05B 100
Patent
active
061473251
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a fixing device for fixing a soldering tip at a soldering device, the soldering tip having a front working end and a rear attachment end opposite said front working end, and the soldering device having a joining end for fixing the fixing end, with a rotationally symmetrical section being arranged at least at one end.
A fixing device of that kind is known for instance from EP 132569. In this device the rear fixing end is inserted in a frictionally engaged manner into a receptacle of the joining end, for which purpose the soldering tip with its fixing end must be pressed into an appropriately selected receiving bore thus causing the fixing of the soldering tip.
DE 2657569 discloses a fixing device in which the rear fixing end is provided with an external thread. This thread is screwed into a receptacle having a corresponding internal thread thus causing the soldering tip to be attached at the soldering device.
Furthermore, DE 29600771 discloses a sleeve-shaped tip support which receives a fixing end of a soldering tip. When screwing the tip support to the soldering device, the soldering tip is also fixed, since the tip support presses the soldering tip with a conically tapering opening edge to for instance a heating means.
Starting out from EP 132569, the object of the invention is to enable an easily detachable fixing of a soldering tip in a soldering device in a constructively simple and safe manner.
This object is achieved in that one end comprises a conical portion which is provided at least at certain portions with an outer cone arranged in the circumferential direction, said cone being arranged eccentrically to the rotational symmetric section, wherein the other end is provided with an inner cone in which the outer cone is rotatably supported between an insertion position and a fixing position.
In the subject matter of the application, a thread for the simple and releasable fixing of the soldering tip is not required. Furthermore, there is no need to press the soldering tip into the receptacle for the frictionally engaged attachment. By the cooperation of the outer cone and the inner cone, a rotation of less than 180.degree. is usually required to turn the soldering tip relative to the receptacle from its insertion position to the fixing position. At the same time the rotational-symmetrical section is received at one end by the respective other end, so that a favorable heat transfer from the heating means of the soldering device results. The inner and outer cone can be manufactured in a simple and inexpensive manner. Compared to a pressed-in soldering tip according to the prior art, the release of the soldering tip is simplified by a respective turning out of the fixing position into the insertion position.
According to a preferred embodiment, the rotational-symmetrical section is substantially formed cylindrically.
In the above-mentioned embodiment, the soldering tip may for instance have a tubular shape at its rear fixing end to accommodate the joining end of the soldering device, wherein the outer cone is formed at the joining end and the inner cone is formed at the fixing end. For easier handling and manufacturing the soldering tip, the fixing end may comprise the cylindrical section and the outer cone, wherein the outer cone conically tapers towards the working end, and the joining end may be formed as a receptacle for inserting the insertion end, and it may be formed with an inner cone which tapers conically towards the soldering tip.
In order to further improve the support of the soldering tip in the receptacle, this receptacle comprises a substantially cylindrical receiving section, which may be formed complementary to the cylindrical section of the insertion end of the soldering tip. The outer cone and the inner cone may be formed relatively to these cylindrical sections at a respective position, such as a rear end of the cylindrical section with respect to the soldering tip. In such an arrangement the outer cone would have a maximum diameter which is smaller t
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Cooper Tools GmbH
Dahbour Fadi H.
Walberg Teresa
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