JPH0193561U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the diffusion-limiting membrane attachment mechanism, FIG. 2A is a longitudinal cross-sectional view of the main part showing the positioning mechanism, and FIG. Figure 3 is a diagram explaining the diffusion-limiting membrane attachment operation, Figure 4 is a schematic diagram showing the configuration of the diffusion-limiting membrane holding plate, and Figure 5 is a schematic diagram of a blood glucose level measuring device incorporating the diffusion-limiting membrane attachment mechanism. FIG. 6 is a schematic vertical sectional view showing a conventional example. 1... Casing, 2... External cover, 3...
Enzyme electrode, 4...Diffusion limiting membrane holding plate, 5...Inner cover, 13...Positioning mechanism, 30...Spring,
32... Diffusion limiting membrane holding plate mounting member, 33... Through hole, 34... Diffusion limiting membrane holding plate housing groove, 44...
...Diffusion restriction membrane, 62...Engagement shaft, 66...Groove, 6
6a, 66b...Upward recess, 67...Stopper.

Claims (1)

[Claims for Utility Model Registration] 1. A diffusion restriction device having a through hole 33 capable of accommodating an electrode 3 for body fluid measurement provided at a predetermined position of the casing 1, and a groove 34 capable of accommodating a diffusion restriction membrane holding plate 4. A positioning unit that is provided so that the membrane holding plate mounting member 32 can be moved in the direction toward and away from the electrode 3, and that positions the diffusion limiting membrane holding plate mounting member 32 at a moving position in the separating direction or a moving position in the approaching direction. 1. A diffusion-limiting membrane attachment mechanism in a biosensor, characterized in that the diffusion-limiting membrane attachment mechanism is provided with 13. 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 above-mentioned utility model registration claim 1, in which the diffusion-limiting membrane holding plate mounting member 32 can be accommodated in or taken out from the groove 34 only by sliding the diffusion-limiting membrane holding plate 4. 2. A diffusion-limiting membrane attachment mechanism in the biosensor according to item 1 or 2. 4. The positioning part 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 any one of claims 1 to 2, which has a pair of engaging portions 66a and 66b located at . 5. The approach direction movement position determined by the positioning unit 13 is set such that the attached diffusion limiting membrane holding plate 4 can be brought into pressure contact with the surface of the electrode 3. 4. A diffusion-limiting membrane attachment mechanism in the biosensor according to any one of Item 4. 6. The above-mentioned utility model registration claim No. 6, wherein the moving position in the separating direction determined by the positioning unit 13 is set so that the attached diffusion-limiting membrane holding plate 4 is in a non-contact state with the surface of the electrode 3. A diffusion-limiting membrane attachment mechanism in the biosensor according to any one of Items 1 to 4.