JPH0525149Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to a cable fixing mechanism for connecting and fixing the terminals of cables such as optical fiber cables, vinyl insulated wires, and captire cables to electronic equipment.

B. Prior art As a cable fixing mechanism, conventionally, for example, as described in Japanese Utility Model Application Publication No. 58-165945, a cable is sandwiched between a pair of clamping bodies and fixed with screws,
As described in Japanese Utility Model Application Publication No. 62-10342, a system has been devised in which a clamping body is screwed into a clamping frame and a cable is fixed via a holding piece.

C. Problems to be solved by the invention In the conventional fixing mechanism, the former mechanism requires screw tightening from the side of the case, which makes the work complicated, and it is difficult to install many screws in a row or block the sides with other parts. If it comes loose, you will not be able to tighten the screws. In addition, with the latter mechanism, not only are the components easy to separate when the cable is not fixed, but the tightening force of the screw acts directly on the cable, causing deformation of the cable, and especially in the case of optical fiber cables, the transmitted light is This method has the disadvantage that it causes attenuation and loss, and is prone to poor detection. In addition, in both cases, the screws had to be tightened with a screwdriver or the like, resulting in poor workability.

D. Means for solving the problem The present invention is a fixing mechanism that is easy to fix and does not cause the possibility of deforming the cable. A base block is provided with a protruding base block in which an arc-shaped cable holding groove that matches the circumferential surface is carved, and a cable insertion hole that penetrates into the case is bored in the case wall surface that is an extension of the holding groove. An annular band having elasticity and a notch is fitted around the ring, and half shafts protruding outward from the notch ends of the annular band are paired to form the fulcrum of the lock lever. The base block and the annular band are inserted into the oval hole so that they repel each other, and by rotating the lock lever, a tightening force is applied to the annular band by the difference between the major axis and the minor axis of the oval hole, and the cable is secured between the base block and the annular band. The reason is that it can be clamped and fixed.

E Action When the lock lever is rotated, the mutually repelling half-shafts approach each other, and a tightening force acts on the band, making it possible to securely hold the cable.

F. Example Next, an example in which the cable fixing mechanism according to the present invention is implemented in a photoelectric switch will be described based on the drawings.

In Figure 1, numeral 1 is the case body, one side of which is the assembly part for the cable fixing mechanism, the other side of which is provided with a cable insertion hole (not shown) for signal transmission, and the top surface of which is used for stable operation. Indicator light 2a
This is an operation display panel surface 2 on which are arranged a lamp for an operation indicator light 2b, volumes 2c and 2d for sensitivity adjustment and hysteresis adjustment, a mode changeover switch 2e, and a check pin 2f. Further, a DIN rail mounting portion 3 is provided on the lower surface.

The cable fixing mechanism consists of a base block 4, an annular band 5 that fits around the base block 4, and a lock lever 6 that tightens the annular band 5. On the upper and lower surfaces of the base block 4, optical fiber cables 7, Retaining groove 4 that matches the circumferential surface of 7
a, 4a are carved, and the retaining groove 4 is formed on the proximal end side.
A contact plate 8 is provided perpendicularly to a, 4a, and an insertion block 9 is provided protruding from the back side of the contact plate 8, and a cable is provided on each extension of the holding grooves 4a, 4a on the contact plate 8. Insertion holes 10, 10 are bored. The body case 1 has a fitting recess 11 corresponding to the abutment plate 8 and the insertion block 9.
Cable insertion holes 11a, 11a continuous with the cable insertion holes 10, 10 are bored, and the base block 4 is inserted into the case by fitting the insertion block 9 and the abutment plate 8 into the recess 11. It is fixed to protrude from the side of the main body 1. The annular band 5 is formed of a highly elastic synthetic resin into a substantially elliptical band that goes around the outer periphery of the base block 4, and has a notch 5a at one location. There are two split shafts 12, 12 each having a shape of vertically dividing a cylinder into two, facing outward.
is provided in a protruding manner, and the cutout portion 5a is slightly open in the normal state and in the state where it is fitted onto the base block 4. The lock lever 6 rotates about its lower end as a fulcrum, and has a hook-shaped locking pawl 6a formed at its tip. The fulcrum is provided with an elliptical hole 13 on one side thereof, and the bisected shafts 12, 1
2 are paired and inserted into the oval hole 13,
The bisecting shafts 12, 12 repel each other, and when the lock lever 6 is rotated about the bisecting shafts 12, 12, the attitude of the ellipse changes, and the bisecting shafts 12, 12 change due to the difference between the major axis and the minor axis of the ellipse. approach or move away. The lock lever 6 has a support pin (not shown) protruding from the back side of the oval hole, and the support pin is supported by a pin receiver 14 protruding from the main body side.
5 to regulate the position and prevent it from falling off.
The cap 15 is formed with cable introduction holes 16, 16 and a window 17 for guiding the lock lever 6, and locking pieces 18 are provided on both sides, and the locking pieces 18 and the locking pieces formed on the main body case 1 are provided. Protrusion 19
The cap 15 is attached to the main body case 1 by the locking action with
is combined with Further, a locking body 20 is provided on the case body 1 so as to protrude from the apex contact portion of the lock lever 6 when the lock lever 6 is raised. It is designed so that it does not come off. In the drawing, 21 is a transparent cover made of synthetic resin that protects the operation display panel surface 2, and 22 is a cover that connects the base block 4 to the main body case 1.
This is a packing member that is interposed when fixing to.

In the cable fixing mechanism formed in this way, first, the lock lever is laid down horizontally, and the optical fiber cable is inserted into the insertion hole so as to pass between the holding groove of the base block and the annular band.
Rotate the lock lever in the standing direction. Then, as shown in Figure 3 a and b, the bisecting shafts are brought closer together,
A tightening force is applied to the annular band. As a result, the optical fiber cable is tightened and fixed with uniform force.

Since the cable can be fixed with a simple operation of rotating the lock lever as described above, work efficiency is high, and the cable can be tightened softly and uniformly around the circumference, so there is no risk of deformation of the cable. Moreover, since the lock levers are rotated around an axis perpendicular to the cable, they will not interfere with the operation even when a large number of lock levers are connected to the same DIN rail 23 as shown in FIG. 4, for example.

Although the above-mentioned embodiments are examples of photoelectric switches, the present invention is not limited thereto, and is common to all cable fixing mechanisms. Further, the base block does not have to be removable, but can be provided integrally with the main body. Furthermore, a stopper for the lock lever consisting of a locking protrusion and a locking pawl may be provided as necessary.

Effects According to the present invention, the cable can be fixed by one-touch operation of the lock lever, so the work efficiency is extremely high. Furthermore, since the cable is tightened by the band, the applied pressure is uniform and does not cause deformation of the cable. Furthermore, the operation of the lock lever is
It can be placed on the cable connection side, and even when installed in a row horizontally, it can be easily operated with just a fingertip without being obstructed by adjacent electronic devices.

[Brief explanation of drawings]

The drawings show an example of a photoelectric switch equipped with a cable fixing mechanism according to the present invention, in which FIG. 1 is an exploded perspective view of the photoelectric switch showing the fixing mechanism, and FIG. 2 is an assembled view of the same. FIGS. 3a and 3b are explanatory diagrams showing a state in which a tightening force is applied to the annular band by operating the lock lever, and FIG. 4 is a perspective view of the state in which it is connected to a DIN rail. 1...Case body, 2...Operation display panel surface,
2a... Stable operation indicator light, 2b... Operation indicator light,
2c... Sensitivity adjustment volume, 2d... Hysteresis adjustment volume, 2e... Mode changeover switch, 2
f...Check pin, 3...DIN rail mounting part,
4...Base block, 4a...Retaining groove, 5...
Annular band, 5a... Notch, 6... Lock lever, 7... Optical fiber cable, 8... Contact plate, 9... Insertion block, 10... Cable insertion hole, 11... Fitting recess, 11a... ... Cable insertion hole, 12 ... Split shaft, 13 ... Oval hole, 14 ... Pin holder, 15 ... Cap,
16... Cable introduction hole, 17... Cue window, 1
8... Locking piece, 19... Locking protrusion, 20... Locking body, 21... Transparent cover, 22... Packing member, 23... DIN rail.

Claims (1)

[Scope of utility model registration request] A base block is protruded from the side of the main case with an arcuate cable holding groove carved on the top and bottom that matches the circumferential surface of the cable, and a base block is provided that penetrates into the case to the case wall that is an extension of the holding groove. A cable insertion hole is bored through the base block, and an annular band having elasticity and a notch is fitted around the base block, and a half-split is provided protruding outward from each of the notch ends of the annular band. The shafts are paired and fitted into an elliptical hole formed at the fulcrum of the lock lever so that they repel each other, and by rotating the lock lever, a tightening force is applied to the annular band by the difference between the major axis and minor axis of the elliptical hole. A cable fixing mechanism characterized in that the cable can be clamped and fixed between the base block and the annular band.