JPS601292Y2 - Drive cable connection device - Google Patents

Description

[Detailed description of the invention] This invention was developed to quickly and firmly attach the cable to a speedometer, etc., which is installed in a narrow space. It is characterized by being removable.

Conventionally, various mechanisms have been developed as connecting devices for drive cables to rotary instruments such as automobiles, but a typical one will be explained with reference to Fig. 1.
The other end of the end fitting that can be fitted onto the boss part of the speedometer A is compressed and connected to the outer m of the cable, while the synthetic resin connecting tool hole that is externally fitted and fixed to the end fitting C is connected. The lever is extended to at least one integral lever type lever, and the claw portion thereof can be engaged with the recessed groove opening of the boss portion opening through the through hole C of the metal fitting C, and the lever is operated by the lever type lever. The claw portion was designed to be easily detachable from the groove.

Therefore, the connector including the lever portion becomes bulky and the outer diameter of the portion increases, making it difficult to attach and detach the cable, especially in narrow spaces.

In short, this type of drive cable connection device has the ability to firmly fix the connecting tool by engaging it in the groove opening of the instrument side boss, and the removability that allows it to be easily removed. Since two contradictory functions are required, simply omitting the lever mentioned above will significantly reduce its releasability, and to compensate for this, it is recommended to add a certain radius or slope to the rear end of the claw. However, there was an inconvenience in that the strong connectivity of the cable was lost.

In view of this situation, the present invention effectively utilizes the elastic properties of the plastic material that constitutes the connecting tool of the tip metal fitting, eliminates the lever type lever, and makes the outer diameter of the part the same as the boss diameter of the instrument. The cable is maintained at the same level or lower, making it easy to attach and detach the cable in extremely narrow spaces.

Hereinafter, the structure will be described in more detail according to the embodiment shown in the drawings. 1 is a boss part of a rotational instrument such as a speedometer, 2 is a distal end fitting of a coupling device that can be fitted into the boss part, and the proximal end 2 ′ to the outer of the drive cable 3, and at the same time,
A through hole 2'' is provided near the tip.

Reference numeral 4 denotes a connecting tool made of plastic or the like that is fixedly fitted onto the base of the tip fitting 2, and a claw 5 on the lower surface of the arm plate 5' extending to the negative side is connected to the through hole of the fitting. 2'' to be exposed on the inner surface.

As shown in an enlarged view in FIG. 3, the claw 5 of the arm plate has a stepped portion a that fits into the rear wall of the through hole 2'' of the tip fitting and the groove 1' of the boss portion, respectively. b, the front surface of which constitutes a relatively gently sloped surface C, and a through hole d near the rear surface formed therethrough.

In addition, it is preferable that the lower edge of the rear surface of the claw is chamfered diagonally or in an arc shape, leaving a joint surface e that contacts the rear wall of the groove.

In the present connecting device according to the above configuration, when the tip fitting 2 to which the drive cable is fixed in advance is inserted into the boss portion 1 of the instrument, the claw 5 exposed on the inner surface of the fitting has its front surface in contact with the outer edge of the boss portion. The claw contacts the arm plate 5' and is pushed up against the elasticity of the arm plate 5', overcomes the outer edge and elastically enters the concave groove 1' of the boss, so that the connecting surface e of the pawl comes into close contact with the rear wall of the concave groove. This is to firmly connect both members.

In this state, the square shaft of the inner tip exposed inside the tip fitting 2 fits into the hollow shaft inside the boss portion, as in the previous case.

On the other hand, when the proposed tip fitting is removed from the boss part 1 of the instrument, by pulling the cable at the proximal end 2' of the tip fitting or a portion close to it, the joint surface e immediately below the stepped part of the claw is The presence of the through hole d allows the lower surface of the claw to easily get over the rear wall of the concave groove through elastic deformation, so that the drive cable can be separated from the boss portion without the need for strong tensile force. It is.

As mentioned above, according to the connecting device of the present invention, the connecting tool does not have a lever type lever unlike the previous ones, and the outer diameter can be configured to be the same as or smaller than the boss part, so that it can be used in extremely narrow places. Not only can the cable be connected to instruments in the instrument, but the cable can also be easily detached from the instrument by simply pulling the outer side. It is something that can be resolved.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view showing an example of a conventional coupling device;
FIG. 2 is a cutaway front view showing the main parts of the proposed coupling device, and FIG. 3 is an enlarged view of the claw portion of the connector. In the figure, 1...Boss part, 2...Tip metal fitting, 3...Drive cable, 4...Connection tool, 5... ·nail.

Claims (1)

[Scope of utility model registration request] The proximal end is connected to the cable, and the distal end thereof is made up of a tip fitting that can be inserted into the host section of the instrument, and a plastic connecting fitting that is fitted externally to the fitting. A device for connecting a drive cable to a rotary instrument of an automobile or the like, which is inserted into a groove and fixed thereto, characterized in that the front surface of the claw part has a gentle slope, and a through hole is provided near the rear edge. Connection device for drive cables in automotive rotation instruments.