JPS6348802Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connection device for connecting a flexible shaft that connects an automobile meter and a drive source to a meter.

A conventional connection device of this type is as shown in FIG. This is because, for example, a rotating shaft 23 in which a square hole 22 is formed is located in a boss portion 21 formed in the speedometer 20, and a locking groove 24 is provided on the outer periphery of the boss portion 21. is formed. In addition, in the flexible shaft 27 consisting of the inner shaft 25 and the outer pipe 26, the outer pipe 2
A mounting bracket 29 having a locking pawl 28 that engages with the locking groove 24 is attached to the tip of the inner shaft 25, and the inner shaft 25 has a rectangular cross section at the tip.
and a fitting part 30 inserted into the square hole 22 described above.
is formed. To connect the flexible shaft 27 to the speedometer 20, the fitting part 30 formed at the tip of the inner shaft 25 is inserted into the square hole 22, and at the same time the speedometer 20 is inserted into the mounting bracket 29.
By fitting the boss portion 21 and engaging the engaging claw 28 and the locking groove 24, the connection between the flexible shaft 27 and the speedometer is completed.

However, in such a conventional connection device between a meter and a flexible shaft, the tip fitting portion 30 of the inner shaft 25 of the flexible shaft 27 is located within the mounting bracket 29, so that the flexible shaft 27 cannot be controlled at speed. When connecting to the total 20, it is not possible to visually check the insertion and fitting state between the fitting part 30 of the inner shaft and the square hole 22 of the rotating shaft 23, and therefore the connection is made by relying on feeling. The workability of meshing the fitting part 30 and the square hole 22 is poor, and if the fitting part 30 and the square hole 22 are forced together in an uncertain state, the inner shaft 25 may be damaged. There was a problem.

The present invention was developed by focusing on these conventional problems, and it is a combination of a measuring instrument and a flexible shaft that makes it possible to easily and reliably engage the fitting part and the square hole. The purpose is to provide a connection device.

The present invention will be explained in detail below based on the embodiment shown in FIGS. 2 and 3.

1 is a flexible shaft having an outer tube 2 and an inner shaft 3; a mounting bracket 4 is fixed to the end of the outer tube 2; is provided. A cylindrical pedestal 6 is fixed to the tip of the inner shaft 3. This pedestal 6
A central shaft hole 7 and cam grooves 8 are provided at two locations in the diametrical direction sandwiching the central shaft hole 7 at the tip thereof. 9 has a support shaft 10 fitted in the above-mentioned central shaft hole 7 at one end and a pair of engaging parts 11 fitted in the above-mentioned cam groove 8, and the other end has: This is a connecting piece in which a square shaft portion 12 is formed to be meshed and fitted into a square hole 22 provided in a meter. Also 1
3 is a coil spring; one end of the coil spring 13 is fixed to a spring attachment hole 14 provided in the coupling piece 9, and the other end is fixed to a spring attachment hole 15 provided in the pedestal 6. That is, the coupling piece 9 and the pedestal 6 are connected by a coil spring 13, and the spring 13 biases the coupling piece 9 against the pedestal 6 in the direction opposite to the arrow direction shown in FIG. Retained. Incidentally, a cam surface 8' is formed on the inner surface of the cam groove 8, which slopes in the inner direction along the arrow direction. Furthermore, since the flexible shaft connecting portion formed in the meter 20 has the same structure as that described in the conventional example, the same reference numerals as in the conventional example will be given, and a description of the structure will be omitted.

Next, the operation of the above will be explained.

When connecting the flexible shaft 1 to the instrument 20, the mounting bracket 4 fixed to the tip of the flexible shaft 1 is fitted into the boss portion 21 of the instrument 20. When the meshing of the part 12 and the square hole 22 is matched, if the mounting bracket 4 is inserted as it is in the direction of the boss part 21, the square shaft part 12 and the square hole 2 are connected.
2 is completed, and at the same time, the locking pawl 5 and the locking groove 2
4, the connection of the flexible shaft 1 is completed. If the square shaft part 12 and the square hole 22 do not mesh when fitting the boss part 21 into the mounting bracket 4, the square shaft part 12, that is, the coupling piece 9, will be rotated by the rotary shaft 23, and the coil spring Since the engaging portion 11 of the connecting piece 9 is pushed against the elastic force of the connecting piece 9, the engaging portion 11 of the connecting piece 9 is pushed while coming into contact with the cam surface 8', and the connecting piece 9 rotates. By rotating this coupling piece 9, engagement between the square shaft part 12 and the square hole 22 is achieved, and thereafter the connection between the boss part 21 of the instrument and the flexible shaft 1 is completed by the same operation as described above. be. Further, in this embodiment, the spiral formed by the coil spring 13 also provides the effect of preventing oil from rising.

As described above, the present invention fixes the pedestal 6 to the tip of the inner shaft 3 built into the flexible shaft 1 which has the connecting fitting 4 connected to the automobile instrument 20 at the tip of the outer tube 2, and An engaging piece 9 that engages with the connecting portion 22 of the rotating shaft 23 of the meter 20 is attached to the pedestal 6 in the axial direction, and the connecting piece 9 is attached to the pedestal 6.
An engagement recess 8 is provided on either the engagement piece 9 or the pedestal 6 for coupling by rotating the parts by a predetermined angle in the circumferential direction, and an engagement protrusion 11 fitted into the engagement recess 8 is provided. , and the connection piece 9 is biased and attached to the pedestal 6 so as to be separated from the pedestal 6. 20 rotating shafts 2
3 and the connecting piece 9, the rotating shaft 23
If the meshing of the connecting piece and the connecting piece match, the meshing is maintained as it is, but if the meshing of the two does not match, the connecting piece rotates (rotates) due to the pressing force of the rotating shaft 23 on the connecting piece. , it is possible to secure the connection between the rotating shaft 23 and the connecting piece 9, and there is an effect that the connection between the meter and the flexible shaft can be achieved smoothly and reliably.

[Brief explanation of the drawing]

Fig. 1 is an explanatory cross-sectional view showing a conventional flexible shaft coupling device, Fig. 2 is a cross-sectional view showing an embodiment of the flexible shaft coupling device according to the present invention, and Fig. 3 is an exploded perspective view of the main parts thereof. It is. 1... Flexible shaft, 2... Outer tube, 3... Inner shaft, 4... Mounting bracket, 5... Locking claw piece, 6... Holder, 7... Center shaft hole, 8... Cam groove , 8'...cam surface, 9...coupling piece, 10...support shaft, 11...engaging portion, 12...square shaft portion, 13...coil spring, 1
4, 15... Spring mounting hole.

Claims (1)

[Claims for Utility Model Registration] 1. A pedestal 6 is fixed to the tip of an inner shaft 3 built into a flexible shaft 1 which has a connecting fitting 4 connected to an automobile meter 20 at the tip of an outer tube 2, and The coupling piece 9 that engages with the coupling part 22 of the rotating shaft 23 of the measuring instrument 20 is arranged axially opposite to the pedestal 6, and the coupling piece 9 is rotated by a predetermined angle in the circumferential direction with respect to the pedestal 6. An engagement recess 8 is provided on either the engagement piece 9 or the pedestal 6, and the engagement protrusion 1 is fitted into the engagement recess 8.
1 is provided on the other side and the connecting piece 9 is biased and attached so as to be separated from the pedestal 6. 2. A combination of an automobile instrument and a flexible shaft according to claim 1 of the utility model registration claim, characterized in that a coil spring 13 is interposed between the coupling piece 9 and the pedestal 6 to surround both. Connection device.