JPH0520890Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to a control cable clamping device used for example in the heater control of an automobile, and more specifically, the invention relates to a control cable clamping device used, for example, in an automobile heater control. The present invention relates to a clamping device that can reduce operating force through a control cable.

[Conventional technology]

FIG. 8 is a perspective view of a conventional control cable clamp device. control cable 1
0 includes a cable outer 12 as an outer skin, and an inner wire 14 that extends slidably within the cable outer 12 and is exposed from the end of the cable outer 12. The circular clamp 16 has
An insertion hole 18 with a circular cross section corresponding to the circumferential contour of the cable outer 12 is formed, and a straight groove 20 extends with equal width on the upper surface of the clamp 16 and communicates with the insertion hole 18 on the lower side. The lever 22 rotates together with an adjustment shaft that adjusts the temperature of the automobile heater, and has a protrusion 24 on the tip side. The exposed end of the inner wire 14 is formed into a loop shape and fastened to the protrusion 24 .

Since the lever 22 rotates around the rotation point at the base end, the tip side, that is, the location of the protrusion 24 moves around a predetermined circumference. On the other hand, since the clamp 16 is fixed to a predetermined part, the cable outer 1
2, that is, the location where the inner wire 14 is exposed from the cable outer 12 is fixed in position despite the rotation of the lever 22. Therefore, when the lever 22 rotates, the exposed range of the inner wire 14 is P according to the circumferential locus of the protrusion 24.
It swings in an angular range θ around .

As a result, cable outer 1 near point P
2 and the inner wire 14 increases, resulting in an increase in the operating force of the control cable.

Therefore, for example, in Utility Model Publication No. 57-53887,
The clamp has a base and a clamp part that is rotatably supported by the base and clamps the cable outer, and the clamp part rotates according to the deflection of the inner wire to reduce sliding resistance. There is.

[Problem that the invention attempts to solve]

The control cable clamp device of Japanese Utility Model Publication No. 57-53887 requires a base and a clamping portion that is rotatably supported by the base, which increases the number of parts and complicates the structure of the pivot support portion between the two, resulting in increased costs.

The purpose of this invention is to reduce the sliding resistance between the inner wire and the cable outer against deflection of the inner wire of the control cable, to reduce the operating force through the control cable, and to simplify the structure of the control cable clamp device. The goal is to provide the following.

[Means for solving problems]

In order to solve the above problems, this invention forms a notch groove on the outer circumferential surface of the cable outer of the control cable, and a narrowed part with an inner diameter that is almost the same as the outer diameter of the cable outer in the middle part. An insertion hole is formed in the clamp that gradually widens as it reaches the end. A locking protrusion that engages with the notch groove to prevent the cable outer from coming off is provided in the narrowed portion.

[Effect]

When the inner wire of the control cable swings as the lever or the like swings, the cable outer of the control cable swings around the engagement portion with the locking protrusion and follows the inner wire within the insertion hole of the clamp. Further, since the locking protrusion provided in the narrowed portion of the insertion hole is engaged with the notch groove provided in the outer peripheral surface of the cable outer, the cable outer of the control cable does not slip out from the clamp.

〔Example〕

This invention will be described below with reference to embodiments shown in the drawings. Note that the parts already explained in FIG. 8 will be designated by the same reference numerals and the explanation will be omitted.

FIG. 3 is a perspective view of the control cable clamp device in use. The heater control shaft 26 is an adjustment shaft for an automotive heater,
It is integrally fixed to the base end of the lever 22.
The clamp 28 is detachably fixed to the casing 30. The insertion hole 32 is formed to pass through the clamp 28 in the diametrical direction, and the straight groove 34
extend with equal width on the upper surface of the clamp 28 and communicate with the insertion hole 32 on the lower side.

FIG. 4 is a front view of the clamp 28. The locking legs 36, 36 are formed on the lower surface side of the clamp 28 so as to protrude downward, are expandable, and have locking claws facing outward in the width direction at the lower ends. By press-fitting the locking legs 36 into square holes of a predetermined size formed in the casing 30 (FIG. 3), the clamp 28 is fixed unrotatably.

1 and 2 show the state of the control cable 10 from above the clamp 28 at different swing angles of the lever 22, respectively. Insertion hole 3
2 is a narrowed portion 38 at a location corresponding to the center of the clamp 28, and the insertion hole 32 is formed from the narrowed portion 38.
The width increases in a fan-like manner toward the openings at both ends.
Cable outer 12 of control cable 10
is pinched from both sides in the narrowed portion 38 and prevented from coming off from the insertion hole 32. As a result,
The control cable 10 is designed to be able to swing around the narrowed portion 38 and within a range on both sides of the narrowed portion 38 at a swing angle θ or more.

The lever 22 is configured to swing around a heater control shaft 26 within a predetermined swing range (A to B to C). As the lever 22 swings around the heater control shaft 26, the protrusion 24 moves in a predetermined circular trajectory, and the protrusion 2 of the inner wire 14 moves in a predetermined circular trajectory.
The 4th side edge swings. control cable 10
follows the deflection of the inner wire 14, so that a predetermined range of the cable outer 12, including the exposed portion of the inner wire 14 and the clamp 28, is approximately in a straight line on both sides of the narrowed portion 38 in the insertion hole 32. It swings within a range and around the narrowed part 38 at a swing angle θ.

FIG. 5 is a plan view of the clamp 28 showing in detail the clamping portion of the cable outer 12 of the control cable 10 in the clamp 28, and FIG. 6 is a sectional view taken along the - line in FIG. As shown in these figures, a notch groove 40 is formed on the outer peripheral surface of the cable outer 12 of the control cable 10. Furthermore, a locking protrusion 42 is provided that faces the narrowed portion 38 of the insertion hole 32 provided in the clamp 28 . Then, this locking protrusion 42 is inserted into the notch groove 4.
0, the cable outer 12 is held from both sides via the locking protrusion 42 to ensure smooth rocking of the control cable 10 while preventing the cable outer 12 from coming out of the insertion hole 32. It's definitely preventive.

7a and 7b show various examples of the cutout groove 40 of FIG. 5. FIG. In FIG. 7a, the cutout groove 40
a is formed in an annular shape on the outer periphery of the cable outer 12, and in FIG. The clamp may be integrally formed.

[Effect of idea]

As is clear from the above description, according to this invention, the intermediate part is a narrowed part with an inner diameter that is approximately the same as the outer diameter of the cable outer, and the clamp is formed with an insertion hole that gradually widens as it reaches both ends. A locking protrusion provided on the squeeze portion is engaged with a notch groove provided on the outer circumferential surface of the cable outer of the control cable to prevent the cable outer from slipping out. Therefore, when the inner wire of the control cable swings as the lever etc. swings, the cable outer of the control cable follows the inner wire in the insertion hole of the clamp and swings around the engagement part with the locking protrusion. Therefore, the sliding resistance between the inner wire and the cable outer is reduced, and the operating force of the control cable is reduced. In addition, since the locking protrusion provided at the narrowed part of the insertion hole is engaged with the notch groove provided on the outer circumferential surface of the cable outer to prevent the cable outer from slipping out, the cable outer swings smoothly. In addition to ensuring safety, it is also possible to reliably prevent the cable outer from coming off.

[Brief explanation of the drawing]

1 to 7 relate to an embodiment of the control cable clamp device of this invention, and FIGS. 1 and 2 are views showing the state of the control cable at different swing angles of the lever from above the clamp, Fig. 3 is a perspective view of the control cable clamp device in use, Fig. 4 is a front view of the clamp, Fig. 5 is a plan view of the clamp showing in detail the holding part of the cable outer of the control cable in the clamp, 6 is a sectional view taken along the - line in FIG. 5, FIGS. 7 a and b are perspective views showing various examples of the notch grooves in FIG. 5, and FIG. 8 is a perspective view of a conventional control cable clamp device. It is a diagram. 10... Control cable, 12... Cable outer, 28... Clamp, 32... Insertion hole, 38... Narrowed portion, 40, 40a, 40b...
Notch groove, 42...locking protrusion.

Claims (1)

[Scope of utility model registration request] A control cable having a notch groove formed on the outer circumferential surface of the cable outer, and a clamp having a narrowed part with an inner diameter approximately the same as the outer diameter of the cable outer in the middle part and an insertion hole that gradually widens as it reaches both ends. A clamping device for a control cable, characterized in that a locking protrusion is provided in the narrowed portion to engage with the notch groove and lock the cable outer to prevent it from coming off.