JPS6349085B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a counter.

For example, in a conventional counter equipped with a lens for magnifying numbers, the lens part was integrated with the cover, so it was impossible to remove the lens part.

In view of the above-mentioned problems, the present invention aims to provide a counter whose fixing work can be automated and whose members can be removed as necessary.

The counter of the present invention will be explained below with reference to an embodiment shown in FIGS. 1 to 3.

In the figure, 1 is a counter frame molded from synthetic resin and has a wall thickness of about 1 mm, 1a is a rectangular flat plate 2 formed approximately in the center of the frame, and a rectangular flat plate 2 of a lens member 2.
These are the same rectangular openings where d is placed. 1b,1
b is a stepped portion on which the frame 1 is mounted, and as shown in FIGS. 1 and 3, the opening 1
It is formed to protrude from the lower half of the wall thickness of the opposing long edges of the frame 1, and in consideration of rigidity, it is provided flush with the lower surface of the frame 1 and has a wall thickness of about 0.5 mm.

1c, 1c are claws for locking the lens member 2 to the frame 1;
As shown in FIGS. 1 and 2, the opposite short edges of the opening 1a are formed at the upper half of the thickness opposite to the step 1b for mounting, and have substantially the same thickness. , is formed at the center of both short edges in consideration of the locking balance. In addition, the protrusion of this claw 1c is small, and the protrusion width is 1/3 to 1/5 of the length L of its short edge (see Figure 1). By reducing the acting force for press-fitting and separating from the lens member 2,
It is now easier to insert and remove.

Reference numeral 2a denotes a transparent lens integrally molded with the flat plate 2d of the lens member 2, which magnifies and visually recognizes the numbers on the number ring (not shown) from the outside.

Reference numerals 2b and 2b are stepped portions for mounting that are mounted on the stepped portions 1b and 1b for being ridden, and as shown in FIG. It is formed to protrude and be flush with the upper surface of the frame 1.

Reference numerals 2c and 2c are stepped portions to be locked to the claws 1c and 1c of the frame 1, and as shown in FIG. The lower surface of the frame 1 is flush with the lower surface of the frame 1.

3 shown in FIG. 1 is a gap for removal formed between the frame 1 and the lens member 2,
For example, the lens member 2 can be removed from the frame 1 by inserting the tip of a flathead screwdriver into the gap 3 and swinging it while applying it to the lens member 2.

Next, a method for attaching the lens member 2 to the frame 1 will be explained. First, the outer peripheral edge of the lens member 2 is aligned with the inner edge of the opening 1a of the frame 1 from above, and then when the lens member 2 is strongly pressed against the frame 1, the stepped portion 1b of the frame 1 is aligned with the stepped portion of the lens member 2. 2b, and on the other hand, the claw 1c of the frame 1 has a wall thickness of about 0.5 mm and protrudes short, so it bends downward once and the moment the edge of the lens member 2 passes through it, the claw 1c returns to its original state and closes the lens. Part 2
It engages with the stepped portion 2c. In this way, the fixation of the lens member 2 to the frame 1 is completed, and this work is extremely easy to automate, since it is only necessary to hold the lens member 2, align it with the opening 1a of the frame 1, and push it down. Suitable for mass production.

That is, for example, the lens member 2 is positioned above the frame 1 positioned at a predetermined position so as to be aligned with the opening 1a, and at this time, the side wall of the lens portion 2a of the lens member 2 is grasped. If the lens member 2 is lowered as it is, the stepped portion 2c comes into contact with the claw 1c and then passes over the claw 1c so that the two engage with each other, and the stepped portion 1b can receive the stepped portion 2b. In addition, since the claw 1c is narrow and thin, the force required for the stepped portion 2c to cross over is small, and the flexibility of the claw 1c allows the step 2c to move over smoothly. The simple operation of pressing the lens member 2 against the frame 1 in this manner is not only extremely suitable for automatic assembly of the lens member 2, but also facilitates automation, especially with the claw 1c.

In FIG. 1, since a gap 3 is formed between the inner edge of the opening 1a of the frame 1 and the outer edge of the lens member 2 on both sides of the claw 1c, the lens member Since the member 2 can be removed, if the lens 2a is scratched or the shape of the lens is not suitable, the lens member 2 can be replaced even after the counter is attached to another device.

Note that the opening 1a of the frame 1 and the lens member 2
The shape is not limited to a rectangle, but may be circular, curved, or any other shape as long as the shapes match and the stepped portions 1b and claws 1c are provided alternately. Further, the claw 1c may be provided on the lens member 2 side, but in this case, it is necessary to configure the claw so that it can stop the frame 1 from below.

As described above, the counter according to the present invention is extremely easy to automate and suitable for mass production, which can help reduce assembly costs and improve the efficiency of assembly work. It also has the advantage that parts can be replaced if necessary.

[Brief explanation of drawings]

FIG. 1 is a plan view of a main part of a counter embodying an embodiment of the counter according to the present invention, and FIGS. 2 and 3 are cross-sectional views taken along lines ``--'' and ``--'' in FIG. 1, respectively. 1... Frame, 1a... Opening, 1b... Stepped portion for mounting, 1c... Claw, 2... Lens member,
2a...Lens, 2b...Stepped portion for mounting, 2c...
...Stepped portion for being locked, 2d...Flat plate.

Claims (1)

[Claims] 1. A semicylindrical lens is integrally formed with a protruding lens along the longitudinal direction of the center of a rectangular flat plate, and steps are formed on the long and short edges of the flat plate so that they are vertically opposite. a lens member, an opening into which the lens member fits, and a step formed opposite each edge of the opening and engaged with each step of the lens member. A counter comprising a frame made of resin, one of the stepped portions of the frame being narrower and thinner than the length of its edge, and formed as a locking claw.