JPH01102759U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the diffusion-limiting membrane attachment mechanism, FIG. 2A is a longitudinal sectional view showing the main parts of the positioning mechanism, and FIG. 2B is a partially see-through bottom view of FIG. 5.
Fig. 3 is a diagram explaining the operation of the diffusion-limiting membrane attachment mechanism, Fig. 4 is a schematic diagram showing the configuration of the diffusion-limiting membrane holding plate, and Fig. 5 is a diagram illustrating a blood glucose level measuring device incorporating the diffusion-limiting membrane attachment mechanism. FIG. 6 is a schematic perspective view, and FIG. 6 is a schematic vertical 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, 15... Removal prevention shaft, 30... Spring, 32... Diffusion limiting membrane holding plate attachment member, 33... Penetration Hole, 34... Diffusion limiting membrane holding plate accommodation groove, 37... Hole, 44... Diffusion limiting membrane, 62... Engagement shaft, 66... Groove, 66a, 66b... Upward recess, 67... Stopper.

Claims (1)

[Claims for Utility Model Registration] 1. Has a through hole 33 capable of accommodating an electrode 3 for measuring a test liquid provided at a predetermined position of the casing 1, and has a groove 34 capable of accommodating a diffusion limiting membrane holding plate 4. The diffusion-limiting membrane holding plate mounting member 32 is provided so as to be movable in the direction toward and away from the electrode 3, and the diffusion-limiting membrane holding plate mounting member 32 can be positioned in a moving position in the separating direction or in a moving position in the approaching direction. and an insertion/removal preventing means 15 that engages with the diffusion limiting membrane holding plate 4 when the diffusion limiting membrane holding plate mounting member 32 is moved in the approach direction. 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. Claim 1 of the above-mentioned utility model registration, 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 insertion/removal prevention means is a retaining shaft 15 provided at a predetermined position of the casing 1, which protrudes into the groove 34 through a hole 37 formed at a predetermined position when the diffusion limiting membrane holding plate mounting member 32 moves in the approach direction. A diffusion-limiting membrane attachment mechanism in a biosensor according to claim 3 of the above-mentioned utility model registration claim. 5. The positioning part 13 is a swinging 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 .