Safety closing device

A closing device comprising a closing element, a sealing element and a closing cap,

• wherein the closing element comprises a fluid channel having an input opening and an output opening,
• wherein the fluid channel is aligned along a closing axis,
• wherein the closing element comprises a first fastener,
• wherein the first fastener is configured and arranged in such a manner, that the closing element is connectable at least form-fitted or force-fitted with a neck of a container, such that a filling material inside the container is guidable into the fluid channel through the input opening,
• wherein the closing element comprises a receiving arrangement for receiving the sealing element,
• wherein the receiving arrangement comprises a latching nose projecting to the closing axis or a latching recess directed away from the closing axis for at least form-fit or force-fit connecting of the closing element with the sealing element,
• wherein the closing element and the sealing element are configured in such a manner, that in a sealed state of the closing device the sealing element is engaged with the receiving arrangement and the sealing element seals the fluid channel at least liquid-tight, and in an unsealed state of the closing device, the sealing element is disengaged with the receiving arrangement,
• wherein the closing element and the closing cap are configured and arranged in such a manner, that the closing device can be brought in a closed state, in which the closing cap closes output opening, and can be brought in an opened state, in which the output opening is released, characterized in that, a sealing protrusion is located at least at one of the receiving arrangement, and the sealing element,
• wherein the sealing protrusion is arranged at a sealing area between the receiving arrangement and the sealing element, such that in a scaled state of the closing device the sealing protrusion abuts on the sealing area between the receiving arrangement and the sealing element for at least liquid-tightly sealing the fluid channel,
• wherein the receiving arrangement comprises the sealing protrusion axially spaced apart from the latching nose or the latching recess,
• wherein the sealing protrusion projects into the direction of the closing axis,
• wherein the sealing protrusion and the sealing element are configured in such a manner, that the sealing protrusion in the sealed state of the closing device abuts on a sealing area of the sealing element for at least liquid-tight sealing the fluid channel,
• wherein the sealing element comprises an outer ring section extending in a direction away from the closing axis, which comprises an U-shaped cross section,
• wherein the U-shaped cross section partially surrounds the receiving arrangement on the side of the input opening,
• wherein a first part of the U-shaped cross section extends from a lower end of the sealing element in a direction away from the closing axis and a second part of the U-shaped cross section extends along the closing axis in the direction of the output opening for partially forming the U-shape, and
• wherein between the first part and the second part of the U-shaped cross section a space is formed for partially accommodating the receiving arrangement on the side of the input opening.