Housing for an injection device

An injection device for administering an injectable medicament into biological tissue, the injection device comprising:

• a housing comprising:
• a cartridge holder comprising a cartridge receiving space to accommodate a cartridge filled with a liquid injectable medicament, the cartridge holder being of substantially tubular shape and extending in an axial direction, the cartridge holder comprising an insert section at a proximal end of the cartridge holder, the cartridge holder comprising a first latch element located on the insert section of the cartridge holder;
• and
• a body to accommodate a drive mechanism comprising a piston rod to operably engage with a piston of the cartridge, the body being of substantially tubular shape and extending in the axial direction, the body comprising a receptacle at a distal end of the body, the body comprising a second latch element located in the receptacle of the body, the second latch element protruding radially inward from a side wall section of the receptacle, wherein the receptacle is configured to receive the insert section of the cartridge holder;
• wherein the first latch element and the second latch element are mutually engageable for fixing the cartridge holder to the body,
• wherein a radial extension of the first latch element of the cartridge holder is less than a thickness of a side wall of the insert section or the side wall section of the receptacle,
• wherein a radial protrusion of the second latch element of the body is less than a thickness of the side wall of the insert section or the side wall section of the receptacle,
• wherein the first latch element is located at an axial distance from a proximal end of the cartridge receiving space that is less than 25% of an axial elongation of the insert section and
• wherein an inside surface of the side wall of the insert section is tapered towards the proximal end of the cartridge holder and comprises a tapered section;
• the drive mechanism assembled inside the body;
• and
• the cartridge assembled inside the cartridge holder.