JPS6298413A - Control cable - Google Patents

Abstract

PURPOSE:To make a switch part execute on/off operations by transferring a turn of a connecting member at the time when a compressive force has been applied to an outercasing, to a rotary ring member through a transfer member, and making a contact terminal and a receiving contact abut on each other by a relative rotation of the rotary ring member and an end part port tool. CONSTITUTION:In a manual brake body 1, when a brake lever 3 is drawn up, an operating end 3d draws an inner cable 20 to the full, and when a torsion is applied, a compressive force is applied relatively to an outer casing 30 and an auxiliary outer casing 33, and they are twisted a little in the direction where they are rewound and loosened. This torsion works so that a connecting member 32 rotates counterclockwise, and the base end and the tip of a coil spring 34 are also rotated counterclockwise. When a groove 36a is displaced relatively against a contact terminal 37a of a contact member 37, and a sufficient tension is applied to the inner cable 20, a receiving contact 36b contacts the contact terminal 37a and pressed against it by an elastic force of the coil spring 34, and as a result, a switch part becomes on. When the brake lever 3 of the manual brake body 1 is laid down, each member moves in the direction reverse to the foregoing, and the switch part becomes off.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a control cable in which an inner cable for pulling is inserted into an outer casing which is a flexible helical tube.

"Prior Art" Control cables are used, for example, to transmit operating force for manual brakes in automobiles, etc., and in this case, it may be necessary to detect the operating state. In the case of a parking brake, which is a manual brake installed in an automobile, there is an indicator lamp indicating the operating state of the parking brake.

Conventional control cables do not have a mechanism to detect operating force, so the above-mentioned parking brake is equipped with a switch that detects the stroke of the operating lever and detects when the operating lever is displaced beyond a certain level. are doing.

``Problems to be Solved by the Invention'' However, such conventional control cables require a separate mechanism to detect the operating status of the control cable, which is not only complicated but also causes high costs. Since the operating state cannot be detected accurately, an operation display may appear even though the braking force is insufficient, which may lead to an unexpected situation. Although it is conceivable to try to provide this mechanism, there is a problem that the spring makes the operating state of the inner cable unstable.

The present invention has been developed by focusing on these conventional problems, and detects this by utilizing the phenomenon that when compressive force is applied to an outer casing that is helical and flexible, it twists slightly. Configure the switch, thereby "−
The purpose is to provide a control cable that solves the problems described above.

"Means for Solving the Problems" The gist of the present invention for achieving the above object is that an inner cable for tensioning is inserted into an outer casing which is a flexible helical tube. In the control cable, a connecting member is fixed to the end of the outer casing, a proximal end of an auxiliary outer casing whose winding direction is different from that of the outer casing is fixed to the connecting member, and a proximal end of the transmission member is fixed to the connecting member. solidifying to the connecting member, solidifying an end fitting to the tip of the auxiliary outer casing;
A rotating ring member is loosely fitted into the end fitting so as to be relatively rotatable, and the tip of the transmission member is engaged with the rotating ring member, so that the end fitting and the rotating ring member are connected. A control cable is provided with a contact terminal insulated from the other side, a receiving contact is provided on the other side to constitute a switch part, and the inner cable is inserted through the connecting member, the auxiliary outer casing, and the end fitting. Exists.

"Function" Therefore, the rotation of the connecting member when compressive force is applied to the outer casing is transmitted to the rotating ring member via the transmission member, and the relative rotation between the rotating ring part and the end part 1-1 is rotated. By bringing the contact *1°Nr into contact with the receiving contact, the switch part is turned on and off.

"Example" Embodiments of the present invention will now be described based on the drawings.

1 to 5 show an embodiment of the present invention, which is used in a parking brake for an automobile.

As can be seen in Figure 5, the manual brake body l is
A brake lever 3 that raises and lowers is pivotally supported on a sector base 2,
Push button 3b protruding from handle 3a of brake lever 3
and ratchet pawl 4 are connected by a connecting rod 3c.

A connecting flange 2a is newly installed at one end of the base of the sector base 2, and one end of the air end of the brake lever 3 forms an operating end 3d.

As shown in FIGS. 1 to 4, the inner cable 20 inserted into the outer casing 30 constitutes most of the total length of the control I/roll cable 10, and the control cable 10 extends to the braking area. There, the tip of the inner cable 20 is connected to a braking operation section (not shown in the figure), and the tip of the outer casing 30 is connected to the connection bracket 5 via an end member 31.

As can be seen in FIG. 4, the outer casing 30 is a flexible right-handed helical tube and is coated with a flexible resin coating 30a. One end side of the connecting member 32 is fitted onto the end portion and solidified.

At the other end of the connecting member 32 on the manual brake body 1 side, there is an auxiliary outer casing 3 which is a left-handed helical tube.
The proximal end of coil spring 34, which is a transmission member, is fitted inside and solidified, and the proximal end of coil spring 34, which is a transmission member, is fitted externally and solidified so as not to contact the outside of auxiliary outer casing 33.

An end part [1 tool 35 is externally fitted and fixed to the tip of the auxiliary outer casing 33, and the end part [1 tool 35] has a cylindrical part 35a, a tip n35b, and a flange 35c.

A rotary ring member 36 is fitted onto the cylindrical portion 35a of the end fitting 35 so as to be freely rotatable, and the tip of a coil spring 34 serving as a transmission member is wound around the outer periphery of the rotary ring member 36.

A contact member 37 is fixed to the cylindrical portion 35a of the end portion 1 tool 35 through a base rib 38 made of an insulator, and is press-fitted to the cylindrical portion 35a with a ring 38a. 3
7a is extended to the rotating ring member 36 and 1. A harness 37b is connected to Ij (portion Ij).

As can be seen in FIG. 2, the contact end f-37a of the member 37 extends into the l+1';3Ba formed in the rotating ring j''
The side wall a forms a receiving contact 36b, thereby forming a switch section.

Auxiliary outer casing 33. A cover 39 covers the coil spring 34 and the switch portion. cover 39
One end is fixed to the end fitting 35 via a holding ring 39a, and the other end 39b comes into sliding contact with the outer periphery of the connecting member 32.

The end part [1 tool 35 is inserted into and connected to the connection flange 2a of the sector base 2 of the manual brake main body 1, and the inner cable 20 is connected to the connection member 32. Auxiliary outer casing 33. It is inserted into the end fitting 35 and extended into the manual brake body 1, and the tip thereof is connected to the operating end 3d of the base end of the brake lever 3.

Next, the effect will be explained.

When the brake is not applied, the contact member 37
The contact end 7-37a of the rotating ring member 36 is the receiving contact 36. It is not in contact with b, and the switch part is in the off state y11
It is.

When the brake lever 3 is pulled out in the manual brake body 1, the operating end 3d pulls the inner cable 20, and braking is applied by a braking operating section (not shown).

When tension is applied by pulling the inner cable 20, a relative compressive force is applied to the outer casing 30 and the auxiliary outer casing 33. Due to this compressive force, the outer casing 30 and the auxiliary outer casing 33 are closed)
It will twist slightly in the direction of the top and loosen.

The twisting directions of the outer casing 30 and the auxiliary outer casing 33 are the same with respect to the connecting member 32, and this twisting acts to turn the connecting member 32 counterclockwise II+/: when viewed from the right side in FIG. Therefore, the base end of the coil spring 34, which is a transmission member, is also rotated to the left, and thereby the tip end of the coil spring 34 is also rotated to the left.

Therefore, when the rotary ring member 36 also rotates under the body weight together with the tip of the coil spring 34, the groove 36a is displaced relative to the contact terminal 37a of the contact member 37, and when sufficient tension is applied to the inner cable 20. , the receiving contact 36b comes into contact with the contact terminal 37a and presses against it by the elastic force of the coil spring 34, and as a result, the switch section is turned on.

When the brake lever 3 of the manual brake body 1 is pushed down, the inner cable 20 is relaxed and the outer casing 30
Since the compressive force of the auxiliary outer casing 33 also becomes smaller, each member that has moved due to the twist moves in the opposite direction to the above, and the switch section is turned off.

If you want to change the detection load, you can do so by strongly turning the base rib 38.
This can be adjusted by changing the position of the contact terminal 37a. Of course, the base rib 38 and the contact member 37 may be permanently fixed.

In addition, in the above embodiment, the control cable according to the present invention is used in the manual brake of an automobile, etc., but the present invention is not limited to this, and it can be used in cases where it is necessary to detect the operating state of the control cable. Needless to say, it can be used in

Alternatively, a coil spring may be used as the transmission member and its elastic force may be used to bring the contacts into pressure contact, or the contact itself may be elastically supported and a rigid transmission member may be used instead of the coil spring. .

Furthermore, the mounting holes F of the contact terminal and receiving contact may be reversed.

"Effects of the Invention" According to the control cable of the present invention, the control cable itself is provided with a switch section that detects its operating state, and the switch section only operates when the tension of the inner cable is above a certain level. By doing so, you don't have to worry about the swift being lost to the outside of the control cable, it's simple and easy to handle, it doesn't cost much, and you can reliably detect the status.

[Brief explanation of drawings]

1 to 5 show embodiments of the present invention.
The figure is a sectional view of the main part of the control cable, and Figure 2 is the 1st part of the control cable.
Figure 3 is a sectional view taken along the line II-II, Figure 3 is a sectional view taken along the knee m line in Figure 1, Figure 4 is a sectional view of the outer casing, and Figure 5 is a sectional view of the installed state of the control cable used in the manual brake. . 1... Manual brake body 3... Brake lever 10... Controller) Roll cable 20... Inner cable

Claims (1)

[Claims] A control cable in which an inner tension cable is inserted into an outer casing which is a flexible helical tube, comprising: a connecting member fixed to an end of the outer casing; A proximal end of an auxiliary outer casing whose winding direction is different from that of the casing is fixed to the connecting member, a proximal end of a transmission member is fixed to the connecting member, and an end fitting is fixed to the distal end of the auxiliary outer casing. Tie,
A rotating ring member is loosely fitted into the end fitting so as to be relatively rotatable, and the tip of the transmission member is engaged with the rotating ring member, so that one of the end fitting and the rotating ring member is connected to the other. A control cable comprising: a contact terminal insulated from one end, a receiving contact provided from the other end to form a switch part, and the inner cable inserted through the connecting member, the auxiliary outer casing, and the end fitting.