JPH10136540A - Cable fixing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an excessive force from being applied to the contact part between a cable and a fixing structure and avoid the break of the cable when a large tension is applied. SOLUTION: An L-shaped rib 9 and an I-shaped rib 10 are made to protrude from the perforated surface of a housing so as to face each other with a hole 2 between them. The L-shaped rib 9 consists of a vertical part 9a which protrudes vertically to the perforated surface 11 and a parallel part 9b which is extended in a direction parallel with the perforated surface 11 and whose tip is extended beyond the hole 2 to the point on the protruding line of the I-shaped rib 10. The I-shaped rib 10 is vertical to the perforated surface 11 and is so extended as to have a gap approximately the same as the diameter of a cable 1 between its tip and the tip of the L-shaped rib 9. An L-shaped rib side branch rib 12 is made to protrude from the vertical part 9a of the L-shaped rib 9 and an I-shaped rib side branch rib 13 is made to protrude from the I-shaped rib 10. Both the side branch ribs 12 and 13 are so extended as to have a gap approximately the same as the diameter of the cable between their respective tops to form a cable passing channel 14. The I-shaped rib side branch rib 13 is a cantilever and has the flexibility.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for fixing a cable of a device having a hole formed in a case formed by molding and passing the cable through the hole into the inside of the case.

[0002]

2. Description of the Related Art FIG. 5 is a plan view showing a conventional example of this type of fixing structure, FIG. 6 is a sectional view taken along line AA in FIG. 5, and FIG. 7 is a sectional view taken along line BB in FIG. In the figure, 1 is a cable, 2 is a hole provided in a housing for passing the cable 1, 3 is an upper case, 4 is a lower case, 5 is a first rib integrally formed with the lower case 4, and 6 is This is the second rib.

Also, as shown in FIGS. 6 and 7, XYZ
Set the direction of. As shown in FIG. 6, the first rib 5 extends parallel to the cable 1 (in the X direction) from the side of the hole 2 and is perpendicular to the cable 1 at a length about the minimum bending radius of the cable 1. It bends in the direction of the hole 2 at a right angle (Y direction) and extends about twice the minimum bending radius of the cable 1, and then turns again at a right angle in the direction of the hole 21 parallel to the cable 1 (X direction), Up to a portion where a gap equivalent to the diameter of the cable 1 is left between the lower case 4 and the holed surface of the lower case 4, the lower case 4 is provided integrally with the lower case 4 so as to form a box.

The second rib 6 is provided on the first rib 5 on the side of the hole 2.
Is provided integrally with the lower case 4 from the opposite side where the cable extends to a portion where a distance equivalent to the diameter of the cable 1 is left. The first rib 5 and the second rib 6 having such a configuration form a cable passage which is bent in both X and Y directions. With the above configuration, the cable 1 is fitted in the cable passage formed by the first rib 5 and the second rib 6, and the bending is restricted from moving in the X-Y direction, and the cable 2 is moved in the Z direction by the hole 2. Is restricted and fixed to the lower case 4. Further, as shown in the sectional view along the line AA in FIG. 7, since the first rib 5 forms a box, even if the cable 1 is pushed into a part inside the housing, it does not enter any more.

[0005]

However, according to the prior art having the above-described structure, when a large tension is suddenly applied to the cable outside the housing, for example, when a person catches a foot on the cable, the cable is not connected to the cable. There is a problem that an excessive force is applied to the contact portion of the fixed structure, a gap is generated between the core of the cable and the coating, and the cable is disconnected.

SUMMARY OF THE INVENTION In view of the above problems, the present invention has a structure for absorbing a tension applied to a cable, and prevents an excessive force from being applied to a contact portion between a cable and a fixing structure when a large tension is suddenly applied. It is another object of the present invention to provide a cable fixing structure that does not cause disconnection.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides that a fixing structure bends under tension applied to a cable. That is, the present invention has a hole formed in a housing formed by molding, a device for passing a cable through the hole into the housing, in the fixing structure of the cable,
An L-shaped rib and an I-shaped rib are formed on a perforated surface having the hole of the housing so as to oppose each other with the hole interposed therebetween, and the L-shaped rib projects perpendicularly to the perforated surface. And a parallel portion which is bent in an L-shape from the vertical portion and extends in parallel with the perforated surface, and the tip of which extends beyond the hole and has the I shape.
The I-shaped rib extends perpendicularly to the perforated surface, and the tip thereof has a gap between the tip of the L-shaped rib and the same length as the cable diameter. The L-shaped rib extends from the vertical portion of the L-shaped rib in a direction parallel to the perforated surface and toward the I-shaped rib side, and the I-shaped rib is parallel to the perforated surface and L-shaped. The I-shaped rib side branch rib protrudes toward the U-shaped rib side, and the protruding tips of the L-shaped rib side branch rib and the I-shaped rib side branch rib extend to a position where a gap approximately equal to the diameter of the cable is opened therebetween, and the cable passes therethrough. A groove is formed, and the I-shaped side branch rib is a cantilever and has flexibility.

At this time, if the central axis of the cable passage groove is located closer to the vertical portion of the L-shaped rib than the central axis of the hole, the bending direction of the cable can be restricted, and the cable cannot be pushed more than a certain amount. A second I-shaped rib side branch rib is formed between the I-shaped rib side branch rib and the perforated surface in parallel with the I-shaped rib side branch rib. When the I-shaped side branch rib is bent in the direction of the perforated surface, the I-shaped side branch rib is located at a position where the amount of bending of the I-shaped side branch rib is regulated so as not to be broken. The leading end of the rib may be extended to a position protruding from the leading end of the I-shaped rib side branch rib in a bent and contacted state to prevent the I-shaped rib side branch rib from breaking.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG.
2 shows a cross section taken along line CC of FIG. 2, and FIG. 3 shows a cross section taken along line DD of FIG. In the figure, 1 is a cable, 2 is a cable 1
, A hole for passing through the inside of the housing, 7 is an upper case, and 8 is a lower case.

Further, as shown in FIGS. 1 and 2, the XYZ directions are set. 9 is an L-shaped rib, 10 is an I-shaped rib,
The L-shaped rib 9 and the I-shaped rib 10 are formed so as to protrude from the perforated surface 11 having the hole 2 of the housing with the hole 2 interposed therebetween. Among them, the L-shaped rib 9 is provided on the perforated surface 11.
A vertical portion 9a protruding perpendicularly to the -X direction, and a parallel portion 9b which is bent at right angles from the vertical portion 9a in an L-shape and extends in the -Y direction parallel to the perforated surface 11, and The tip 9c extends beyond the hole 2 to a position on the protruding line of the I-shaped rib 10. The vertical portion 9a is formed to a length equal to or greater than the minimum bending radius of the cable 1.

On the other hand, the I-shaped rib 10 is perpendicular to the perforated surface 11, and its tip 10a is spaced from the tip 9c of the L-shaped rib 9 by a gap s approximately equal to the diameter of the cable. To the -X direction. Reference numeral 12 denotes an L-shaped rib side branch rib which is parallel to the perforated surface 11 from the vertical portion 9a of the L-shaped rib 9 and protrudes toward the I-shaped rib 10 in the −Y direction. 13 is a flexible cantilever I
The I-shaped rib side branch rib 13 projects in the + Y direction from the I-shaped rib 10 in parallel with the perforated surface 11 and toward the L-shaped rib 9. The cantilever of the I-shaped rib side branch rib 13 is formed in a floating state except that the base is connected to the I-shaped rib 10.

Here, these L-shaped rib side branch ribs 12 and I
The protruding tips 12a and 13a of the U-shaped side branch ribs 13 extend to a position where a gap s approximately equal to the diameter of the cable is opened therebetween, thereby forming a cable passage groove 14. The central axis X1 of the cable passage groove 14 is closer to the vertical portion 9a of the L-shaped rib 9 than the central axis X2 of the hole 2. The L-shaped rib 9, the I-shaped rib 10, the L-shaped rib side branch rib 12 and the I-shaped rib
The U-shaped side branch rib 13 forms a cable passage which is bent in both X and Y directions.

Reference numeral 15 denotes a second I-shaped rib side branch rib formed between the I-shaped rib side branch rib 13 and the perforated surface 11 so as to protrude in the + Y direction. The projecting position of the I-shaped rib side branch rib 13 is parallel to the I-shaped rib side branch rib 13 so that the I-shaped rib side branch rib 13 is not bent when the I-shaped rib side branch rib 13 is bent in the direction of the perforated surface 11. In addition, at the position where the amount of deflection is regulated, the tip 15a further extends to a position protruding from the tip 13a of the I-shaped rib side branch rib 13 in a bent and contacted state.

The second I-shaped rib side branch rib 15 is connected to the side wall 8a of the lower case 8 and the I-shaped rib 10 in order to provide a regulating force. The operation of the embodiment of the present invention having the above configuration will be described below. As shown in FIGS. 1 and 3, the cable 1 passed through the hole 2 into the inside of the housing is formed by an L-shaped rib 9, an I-shaped rib 10, an L-shaped side rib 12 and an I-shaped side rib 13. By fitting into the cable passage, the bending restricts the movement in the X-Y direction, the hole 2 restricts the movement in the Z direction, and is fixed to the lower case 8.

As described above, the cable passage groove 14
Since the center axis X1 of the cable 1 is closer to the vertical portion 9a of the L-shaped rib 9 than the center axis X2 of the hole 2, when the cable 1 is pushed into the housing, the cable bends in a certain direction. That is, the direction of bending of the cable 1 can be regulated,
The cable 1 cannot be pushed beyond a certain level. FIG. 4 is a cross-sectional view showing the operation of the present embodiment, and shows a cross section taken along line CC of FIG.

When sudden tension in the + X direction is applied to the fixed cable 1 from the outside of the housing as described above, the I-shaped side branch rib 13 can be a cantilever as shown in FIG. Since it has flexibility, it bends in the + X direction to absorb tension. Further, the bent I-shaped side branch rib 13 abuts on the second I-shaped rib side branch rib 15 before reaching the breaking amount, and further bending is restricted. This prevents the I-shaped side rib 13 from breaking.

Further, the I-shaped rib side branch rib 13 is provided with a second I-shaped rib.
When the cable 1 comes into contact with the side ribs 15, the load of the tension in the + X direction of the cable 1 is transferred from the side ribs 13 to the second side ribs 15. Thereby, the cable 1
The movement in the + X direction is restricted by the contact with the second I-shaped rib side branch rib 15, so that it does not go outside any more and the fixation is maintained.

In the above-described embodiment, the present fixing structure is provided inside the housing. However, the present invention is not limited to this, and may be provided outside the housing. In addition, other than the molding material, the rib may be replaced with a plate material or the like, and welding, an adhesive, or the like may be used.

[0019]

As described in detail above, according to the present invention, the cable is fixed to a device having a hole formed in the case formed by molding and having the cable passed through the hole into the inside of the case. In the structure, an L-shaped rib and an I-shaped rib are formed on a perforated surface having the hole of the housing so as to oppose each other with the hole interposed therebetween, and the L-shaped rib is perpendicular to the perforated surface. A protruding vertical portion and a parallel portion which is bent from the vertical portion in an L-shape and extends in parallel with the perforated surface, and a tip of which extends beyond the hole and onto a protruding line of the I-shaped rib. ,
The I-shaped rib is perpendicular to the perforated surface, and a tip of the I-shaped rib extends to a position where a gap between the I-shaped rib and a tip of the L-shaped rib is made substantially equal to the diameter of the cable. A L-shaped rib side branch rib protrudes from the portion parallel to the perforated surface and toward the I-shaped rib side, and an I-shaped rib side branch parallel to the perforated surface and toward the L-shaped rib side from the I-shaped rib. The L-shaped rib side branch ribs and the I-shaped rib side branch ribs have projecting tips extending to positions where a gap equivalent to the diameter of the cable is opened therebetween to form a cable passage groove,
Since the I-shaped rib side branch rib is a cantilever and has flexibility, the fixing structure can be bent by the tension applied to the cable.

This makes it possible to absorb the tension applied to the cable, to prevent an excessive force from being applied to the contact portion between the cable and the fixed structure when a sudden large tension is applied, and to prevent the cable from being disconnected. There is an effect of providing a fixed structure. At this time, if the central axis of the cable passage groove is closer to the vertical portion of the L-shaped rib than the central axis of the hole, the bending direction of the cable can be regulated, and the cable cannot be pushed more than a certain amount.

A second I-shaped rib side branch rib is formed between the I-shaped rib side branch rib and the perforated surface so as to project in parallel with the I-shaped rib side branch rib. Is located at a position that regulates the amount of deflection of the I-shaped rib side branch rib so that the I-shaped rib side branch rib does not break when the I-shaped side branch rib is bent in the direction of the perforated surface. When the tip of the I-shaped side branch rib is extended to a position protruding from the tip of the I-shaped side branch rib in a bent and contacted state, the bent I-shaped side branch rib becomes the second before the bending amount is reached. Since further deflection is regulated by contacting the I-shaped rib side branch rib,
There is an effect that the U-shaped rib side branch rib can be prevented from being broken.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a plan view showing one embodiment of the present invention.

FIG. 3 is a cross-sectional view showing one embodiment of the present invention.

FIG. 4 is a sectional view showing one embodiment of the present invention.

FIG. 5 is a plan view showing a conventional example.

FIG. 6 is a sectional view showing a conventional example.

FIG. 7 is a sectional view showing a conventional example.

FIG. 8 is a sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cable 2 hole 7 Upper case 8 Lower case 9 L-shaped rib 9a Vertical part 9b Parallel part 10 I-shaped rib 11 Perforated surface 12 L-shaped rib side branch rib 13 I-shaped rib side branch rib 14 Cable passage groove 15 Second I-shaped Rib side branch rib

Claims (3)

[Claims] 1. A fixing structure for a cable of a device having a hole formed in a case formed by molding and passing a cable through the hole into the inside of the case, wherein a hole having the hole of the case is provided. L-shaped ribs and I-shaped ribs are formed on the surface so as to be opposed to each other with the hole interposed therebetween. The L-shaped rib is formed into a vertical portion projecting perpendicularly to the perforated surface and an L-shape from the vertical portion. A parallel portion that is bent and extends parallel to the perforated surface, and a tip of which extends beyond the hole to a protruding line of the I-shaped rib; The L-shaped rib has a tip extending to a position where a gap equivalent to the diameter of the cable is made between the tip of the L-shaped rib and a vertical portion of the L-shaped rib, which is parallel to the perforated surface and I-shaped. The L-shaped rib side branch rib is protruded toward the rib side, and the hole is opened from the I-shaped rib. The I-shaped rib side branch ribs project parallel to the L-shaped rib side, and the protruding tips of the L-shaped rib side branch ribs and the I-shaped rib side branch ribs provide a gap between them that is approximately equal to the diameter of the cable. The I-shaped side branch ribs are cantilevered and have flexibility so as to extend to a cable passage groove. 2. The cable fixing structure according to claim 1, wherein a central axis of the cable passage groove is closer to a vertical portion of the L-shaped rib than a central axis of the hole. 3. Between an I-shaped rib side branch rib and a perforated surface,
A second I-rib side branch rib protrudes and is formed in parallel with the I-rib side branch rib, and the second I-rib side branch rib is bent when the I-rib side branch rib is bent in the perforated surface direction. The I-shaped rib side branch rib is located at a position where the amount of flexure of the I-shaped rib side branch rib is regulated so as not to be broken in contact with the I-shaped rib side branch rib. The cable fixing structure according to claim 1, wherein the cable fixing structure extends to a position protruding from a tip of the cable.