JPH01102761U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view showing one embodiment of the diffusion-limiting membrane attachment mechanism, Fig. 2 is a schematic diagram of the main parts explaining the sliding operation of the inner cover, and Fig. 3A is a longitudinal cross-sectional view showing the main parts of the positioning mechanism. 3B is a partially see-through bottom view of FIG. 6, FIG. 4 is a diagram explaining the operation of the diffusion-limiting membrane attachment mechanism, and FIG. 5 is a schematic diagram showing the structure of the diffusion-limiting membrane holding plate. 6 is a perspective view schematically showing a blood glucose level measuring device incorporating a diffusion-limiting membrane attachment mechanism;
The figure is a schematic longitudinal sectional view showing a conventional example. DESCRIPTION OF SYMBOLS 1... Casing, 2... External cover, 3... Enzyme electrode, 4... Diffusion limiting membrane holding plate, 13... Positioning mechanism, 17... Release mechanism, 32... Diffusion limiting membrane holding plate attachment member, 33... Through hole, 34... Diffusion Limiting membrane holding plate accommodation groove, 44... Diffusion limiting membrane, 62... Engagement shaft, 64...
Lever, 66...groove, 66a, 66b...upward recess, 67...stopper, 68...rotating member, 68a...engaging groove.

Claims (1)

[Claims for Utility Model Registration] 1. A through hole 33 capable of accommodating an electrode 3 for measuring a test solution provided at a predetermined position of the casing 1, and a groove 34 capable of accommodating a diffusion limiting membrane holding plate 4.
The diffusion limiting membrane holding plate mounting member 32 having the electrode 3
It is movable in the direction of approaching and separating from the
Moreover, the diffusion restriction in the biosensor is characterized by being provided with a positioning mechanism 13 that restricts the movement range of the diffusion restriction membrane holding plate attachment member 32, and a release mechanism 17 that releases the movement range restriction state by the positioning mechanism 13. Membrane attachment mechanism. 2. The diffusion-limiting membrane mounting mechanism in the biosensor according to claim 1, wherein the diffusion-limiting membrane holding plate mounting member 32 is rotatably provided about one end thereof as a fulcrum. 3. The positioning mechanism 13 is a swing member 67 having a guide groove 66 that engages with an engagement shaft 62 provided on the diffusion-limiting membrane holding plate mounting member 32, and the guide groove 66 is aligned with the center of swing. A diffusion-limiting membrane mounting mechanism in a biosensor according to claim 1 or 2, which has a pair of engaging portions 66a and 66b located at the 1st and 2nd claims. 4 The release mechanism 17 connects the engagement shaft 62 and the guide groove 66
The diffusion-limiting membrane mounting mechanism in a biosensor according to claim 3, wherein the rocking member 67 is moved in a direction in which it is disengaged from the rocking member 67. 5. Diffusion in the biosensor according to claim 3 or 4, wherein the swinging member 67 is attached to the lever 64 which is always urged to rotate toward the engagement shaft 62. Restriction membrane attachment mechanism. 6. The diffusion-limiting membrane attachment mechanism in a biosensor according to claim 1 or 4, wherein the release mechanism 17 is operable from outside the lower surface of the casing 1.