Thermostatic cartridge for mixing valve Thermostatic cartridge (10) for mixing valve intended to mix a cold incoming fluid (F1) and a hot incoming fluid (F2) in a determined proportion to form a mixture (M). The cartridge comprises a head (41) defining a housing (55) extending along a central axis (X), and a thermostatic adjustment assembly (47) suitable for adjusting the temperature of the mixture and comprising: - an adjustment system ( 61) defining an abutment surface (63) adjustable in axial translation relative to the head, - a thermostatic system (65) comprising at least a first thermosensitive part (73) on which the mixture is intended to flow, and a second part (75) adapted to abut axially against the abutment surface, the first part (73) being adapted to move the second part (75) in axial translation between a plurality of relative positions relative to the first part, the relative positions being determined by the mixing temperature, - a slide (49) mounted mobile on the first part (73) in axial translation relative to the head between a plurality of positions to modify said determined proportion. The drawer is slidably mounted on the first part between a normal position relative to the first part, and a plurality of overtravel positions axially closer to the head than the normal position. The thermostatic system comprises a safety spring (81) adapted to exert on the slide an axial force (F4) directed from the abutment surface towards the second part. Figure for the abstract: Figure 2
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