JPS601483B2 - Connection device between flexible cable and meter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connection device between a speedometer and a flexible cable for extracting the rotation of a transmission in a wheel and transmitting it to the speedometer.

Conventionally, the connection between this kind of flexible cable and a meter is as shown in FIGS. 1 and 2, from an outer tube 3a and an inner shaft 3b to a stem portion 2 of a meter body in which a rotating shaft 1 is incorporated. This is achieved by engaging the locking pawl 4a with the annular groove 2a by competing the connector 4 provided at the end of the flexible cable 3, and at this time, the tip of the inner shaft 3b The square-shaped engagement shaft 3b engages in the square-shaped engagement hole la of the rotating shaft 1 to transmit rotation, and the speed is displayed by swinging the speedometer pointer using a well-known mechanism. It is.

By the way, when the above-mentioned connecting rod 4 is iron-fitted to the stem portion 2 of the meter body, the tip of the square-shaped engagement shaft 3b in the inner shaft 3b and the tip of the square-shaped engagement hole la in the rotating shaft 1 must be completely aligned. If not, it will not be possible to combine the two, and in this case, it is necessary to rotate the connected odor 4 slightly to the left and right to find the conflicting point and release it.
Such adjustment operations within a narrow space behind the makeup can be extremely troublesome.

In addition, recently, various devices are arranged close to the dashboard behind the meter, and there is no space available to manually connect the flexible cable 3 from behind the meter as in the past. For this purpose, an attempt has been made to fix the flexible cable 3 in advance at a predetermined continuous position behind the meter, and then attach the meter from the front of the panel to obtain connection with the flexible cable 3. In this case, as mentioned above, when the square-shaped engagement hole la of the rotating shaft 1 and the square-shaped engagement shaft 3b of the inner shaft 3b do not match, tilt the meter left and right to find the engagement point and make the adjustment. Since it cannot be operated, there is a drawback that the connection operation is extremely difficult.

The present invention has focused on the above-mentioned points, and when connecting a flexible cable connector to the stem of a meter, or when fitting the stem to the connector, the angular connecting shaft of the inner shaft is enters the introduction hole of the rotating shaft in the stem part, and if the square hole engagement axis does not match with the square engagement hole formed following the introduction hole, the rotation axis will match as the iron fitting operation is performed. This allows the two to be easily engaged by a simple pushing operation.

Further, in the present invention, the rotating shaft having the square engagement hole is formed of a metal material to provide sufficient wear resistance to the bearing, and the tip material iron-bonded to the tip of the rotating shaft is made of synthetic resin. It is possible to easily form an engagement step part on the nuclear chip material having an inclined surface for guiding introduction when the angular engagement shaft and the angular engagement hole do not match. be.

An embodiment of the present invention will be described below with reference to the drawings.
The flexible cable 5 is provided by inserting an inner shaft 5b made of a densely spirally wound steel wire into an outer tube 5a made of synthetic resin so that it can be freely routed, so that the rotational force from the outlet of the transmission is The signal is transmitted to the tip of the inner shaft 5b.

A connecting rod 6 made of synthetic resin is fixed to the tip of the outer tube 5a by welding means, and a key 7 in the shape of a square shaft made of synthetic resin is attached to the inner shaft 5b within the connecting tool 6, and the attaching part 7a is fixed to the inner shaft 5b. The mounting portion 7a has a shaft vibration prevention portion 7b that contacts the inner wall of the connector 6.
is provided.

A conical insertion guide portion 7c is formed at the tip of the key 7. Reference numeral 8 denotes a stem portion protruding from the back of the speedometer main body, and inside the main body, although not shown, are provided a rotating magnet, a guide plate, a pointer shaft, a hair spring, a dial plate, and a pointer, as is known in the art.

A rotating shaft 9 connected to a magnet is provided within the stem portion 8 via a bearing 10 made of Akatsuki metal.

In order to prevent the rotary shaft 9 from slipping out from the bearing 10, a collar 11 is driven and fixed to the rotary shaft 9. Rotating shaft 9
is made of steel, and a square engagement hole 9b for the key 7 is formed following the circular hole 9a, and two opposing grooves 9c are formed in the circular hole 9a.

Reference numeral 12 denotes a synthetic resin chip attached to the rotary shaft 9, and a circular introduction hole slightly larger than the circumscribed circle of the square shaft-shaped key 7 is provided next to the enlarged competitive guide portion 12a for the key 7. 12b is formed, and a competing hole 12c for accommodating the tip of the rotating shaft 9 is further provided, and a protrusion 1 that engages with the split groove 9c is provided at opposing positions on the inner circumferential surface of the mating hole 12c.
2d is formed, and the protrusion 12d is formed with an introduction space 12e for the corner 7d of the key 7 so as to form an engagement step 12e having a mirror slope extending in all axial directions.
The synthetic resin tip 12 is connected to the rotating shaft 9 through the iron fitting hole 2c, and in this case, the protrusion 12d is connected to the dividing groove 9.
It is attached to c and fixed. In this state, the protrusion 12d is substantially flush with the corresponding surface of the square engaging hole 9b. In the embodiment, two engaging step portions 12e having inclined surfaces are provided, but the same effect can be obtained with one to four engaging step portions 12e. Next, the connection operation will be explained.

If the meter side is fixed and the connected odor 6 competes with the stem part 8, first insert the conical insertion guide part 7 at the tip of the key 7.
c is guided by the enlarged guide part 12a of the tip 12 fixed to the rotating shaft 9 and guided into the circular introduction hole 12b, and then when the connecting rod 6 is further inserted, the key 7 and the engagement hole 9b are aligned. If not, the corner 7d of the key 7 enters the introduction space 12e and abuts against the engagement step 12d having an inclined surface, thereby causing the rotating shaft 9 to rotate slightly. The positions are automatically adjusted so that the square tree-shaped key 7 and the square engagement hole 9b coincide with each other, and by further insertion, the key is completely engaged in the engagement hole 9b. A connector 6 at the end of the flexible cable 5 locks the connector 6 to the stem portion 8 by appropriate engagement and holding means.
is fixed to the vehicle body in advance, and when inserting the meter or stem part 8 from the driver's seat side, the key 7 side should be attached to the inner shaft 5.
It does not rotate because it is under a high load due to the gear reduction etc. of the key 7 and the transmission, and therefore rotates from the rotary shaft 9 or tip 12 side in the same way as described above to adjust the position when the key 7 and the engagement hole 9b do not match. In this case, since the meter is fixed to the panel and the connecting rod 6 is fixed to the vehicle body in advance, a means for locking the stem portion 8 and the connecting rod 6 is not necessarily required.

Since the present invention is constructed as described above, even if the angular engagement shaft of the key or the like at the end of the flexible cable does not coincide with the angular engagement hole of the rotation axis of the meter at the time of connection, the angular engagement The corner of the angular engagement shaft engages with the engagement step portion having a mirrored slope for guiding the introduction into the shaped engagement hole, and the rotation shaft automatically rotates in the matching direction. They can be connected easily and quickly in one operation without the need for adjustment operations, and since the rotating shaft is made of metal material, they have excellent wear resistance and do not have inclined surfaces that are troublesome to process. Since the engaging stepped portion is formed on a synthetic resin tip that is attached to the rotating shaft, it has the advantage of being easy to manufacture.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional connecting device between a flexible cable and a meter in a separated state, Fig. 2 is a cross-sectional view of the same connected state, and Fig. 3 is a cross-sectional view of a connected traverse according to the present invention in a separated state. , FIG. 4 is an exploded perspective view of the main parts same as above, and FIG. 5 is an end view of the synthetic resin chip portion. 5...Flexible cable, 5a...Outer tube, 5b...Inner shaft, 6...Connection odor, 7...
... Square engagement shaft, 8 ... Stem part, 9 ...
...Metal rotation shaft, 9b...Square engagement hole,
12...Synthetic resin chip, 12b...Introduction hole, 12c...Engagement step portion having a front surface. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1 At the end of a flexible cable consisting of an outer tube and an inner shaft, a connector that engages with the stem of the meter is provided, and at the end of the inner shaft, an angular engagement shaft with a conical tip is provided, and the stem section A square engagement hole into which the square engagement shaft fits is provided in the metal rotation shaft provided in the
A flexible cable and a meter characterized in that a synthetic resin chip fixed to an end of the rotating shaft is provided with an engaging stepped portion having an inclined surface for guiding introduction into the square engaging hole. Coupling device.