JP2001085869A - Cable-fixing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent breaking of wires and contact failures, when a LAN cable is connected to a housing. SOLUTION: A groove 2b that leads a LAN cable 1 is formed on a leg part 2a of a housing 2. A minimum radius of curvature R0 of a LAN cable 1 holds the relation R2>=R0, where R2 is the distance from the boundary point between a plug 1a and the LAN cable 1 to the installation plane of the housing 2. In addition, the relation θ<90 deg.C holds, where θ is the angle between the inserting direction of the plug 1a and the installation plane of the housing 2. Furthermore, the relation R1>=R0 holds, where R1 is the radius of the curvature 2c of the groove 2b. Consequently, the LAN cable 1 can be fixed, securing a minimum radius of curvature.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable fixing structure for connecting a cable to a housing, and particularly to a connection failure between the LAN cable and the housing and disconnection of the LAN cable when connecting a LAN cable to the housing. The present invention relates to a LAN cable fixing structure for preventing the problem.

[0002]

2. Description of the Related Art FIG. 12 is a perspective view of a conventional LAN cable fixing structure. According to the conventional structure, LAN cable
The LAN cable 1 and the housing 2 are connected by inserting the plug 1a at one end into the modular jack 3 on the back of the housing 2 (a telephone set on a desk or the like). Therefore, the LAN cable 1 is fixed only at the connection between the plug 1a and the modular jack 3.

[0003]

Since the LAN cable is vulnerable to bending, the radius of curvature when used is set to be four times or more the wire diameter. However, it is difficult to secure the radius of curvature with the conventional LAN cable fixing structure. Met. Therefore, prevention of disconnection was not sufficient.

[0004] The LAN cable is a rigid cable because a total of eight single wires of four pairs of twisted pair wires are contained therein and a shield may cover the twisted pair wires. Therefore, absorption of the load by the cable itself cannot be expected. In the conventional LAN cable fixing structure, when a load is applied to the LAN cable, the load is directly applied to the connection portion between the plug and the modular jack, so that the connection portion is liable to cause a problem and a contact failure may occur. .

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a cable fixing structure for a housing, wherein a cable having a connection portion for connecting the cable and a groove for fitting the cable is provided on the bottom surface of the housing. A fixed part is provided. The groove is
At least in a range from the connection portion to a position where the cable contacts the installation surface of the housing, the cable has a curved surface having a radius equal to or greater than the minimum radius of curvature of the cable in the longitudinal direction of the cable.

[0006]

FIG. 1 is a perspective view showing a first embodiment of a cable fixing structure according to the present invention. The perspective view of FIG. 1 is a view as seen from the back surface of the housing 2.

In FIG. 1, a modular jack 3 is provided on the bottom of a housing 2, and a plug 1 a at the end of the LAN cable 1 is inserted to connect the housing 2 to the LAN cable 1. The housing 2 has a leg portion 2a, and a groove portion 2b having a linear portion 2b and a curved surface portion 2c is formed in the leg portion 2a. The LAN cable is led out along the groove 2b.

FIG. 2 is a sectional view taken along the line AA ′ of FIG. If the length of the plug 1a protruding from the modular jack 3 is 1 and the distance from the demarcation point of the plug 1a and the LAN cable 1 to the installation surface of the housing 2 is R2, the height of the leg 2a is 1 + R2. Is calculated. Here, R2 is R2 ≧ R0, where R2 is the minimum radius of curvature of the LAN cable 1. When the angle between the insertion direction of the plug 1a and the installation surface of the housing 2 is θ, θ <90 °. Further, assuming that the radius of the curved surface portion 2c of the groove portion 2b is R1, the relationship with the minimum curvature radius R0 of the LAN cable 1 is R1 ≧ R0.

The LAN cable 1 is not flat when placed naturally, and has irregularities due to waves, so that when the LAN cable 1 is installed, a straight line portion is formed from the installation surface of the housing 2 so that the housing 2 does not float. Set the height t up to 2d. LAN cable 1
In consideration of the wire diameter d and the height α of the unevenness of the LAN cable 1, d + α ≧ t ≧ d.

FIG. 3 shows the relationship between the weight of the housing and the repulsive force of the cable. The relationship of W> F is established between the own weight W of the housing 2 applied to the bent portion 1b of the LAN cable 1 and the repulsive force F of the LAN cable 1.

Next, in the first embodiment, the LAN
The fixing operation of the cable will be described.

First, the LAN cable 1 and the housing 2 are connected, and the LAN cable 1 is inserted into the groove 2b and installed on a desk or the like. As shown in FIGS. Along the curved surface of the groove 2b,
It is bent so as to keep the minimum radius of curvature R0.

At this time, the plug 1a and the LAN cable 1
And the distance R2 from the demarcation point of
In addition, by securing the angle θ between the insertion direction of the plug 1a and the installation surface, the LAN cable 1 can be smoothly bent.

Further, the weight W of the casing 2 and the repulsive force F of the LAN cable 1 have a relation of W> F, and the height t from the installation surface of the casing 2 to the straight portion 2d, the LAN cable 1 D + and the height α of the irregularities of the LAN cable 1 are d +
Since there is a relationship of α ≧ t ≧ d, the unevenness of the LAN cable 1 is flattened by the weight of the housing 2, and the floating of the housing 2 is suppressed.

A state where a load is applied to the LAN cable will be described. As shown in FIG. 2, when the force of F2 is applied to the LAN cable 1, a load is not directly applied to the connection portion between the plug 1a and the modular jack 3, and most of the connection between the plug 1a and the groove 2b and the mounting surface. Absorbed by contact.

According to the first embodiment of the present invention described above, the following effects can be obtained.

A groove for guiding the LAN cable is provided in the leg of the housing so that the minimum radius of curvature of the LAN cable can be secured. Therefore, disconnection of the LAN cable can be prevented. In addition, since the load applied to the LAN cable is not directly transmitted to the connection between the plug and the modular jack, the connection can be protected.

Although the description has been given of the case where the number of LAN cables is one, the number of modular jacks may be increased and the width of the groove may be increased so that a plurality of LAN cables can be connected. Also, the example in which the linear portion is provided in the groove portion has been described, but the height t from the installation surface of the housing to the upper surface of the groove portion,
If the wire diameter d of the LAN cable and the height α of the unevenness of the LAN cable have a relationship of d + α ≧ t ≧ d, the groove may be formed only by the curved surface. However, it is better to provide a straight part,
This is more effective in suppressing the repulsion of the LAN cable and stabilizing the installed housing.

FIG. 4 is a perspective view showing a second embodiment of the cable fixing structure of the present invention. The perspective view of FIG. 4 is a view as seen from the back surface of the housing 2.

In FIG. 4, the leg 2a has a notch 2e and a corner 2f in addition to the structure of the first embodiment.

FIG. 5 shows an arrow view of the leg. Notch 2
"e" penetrates in the left-right direction on the same plane as the groove 2b. The relationship between the radius R3 of the corner 2f and the minimum radius of curvature R0 of the LAN cable 1 is R3 ≧ R0. FIG. 7 is a side view of the housing when the housing is installed close to a wall.
The width t1 of the notch 2c and the wire diameter d of the LAN cable 1
Is such that t1 ≧ d.

Other structures are the same as in the first embodiment.

Next, according to the second embodiment, the LAN
The fixing operation of the cable will be described. The description of the same parts as in the first embodiment will be omitted.

As shown in FIG. 7, when the housing 2 is installed close to a wall, the LAN cable 1 has a notch 2e.
Bend in either direction. At this time, LAN
Since the cable 1 is bent along the corner 2f, the minimum radius of curvature R0 can be secured.

The state when a load is applied to the LAN cable will be described. As shown in FIG. 5, when a force of F3 is applied to the LAN cable 1, a load is not directly applied to the connection between the plug 1a and the modular jack 3, and most of the contact between the corner 2f and the housing 2 does not occur. Is absorbed by contact with the installation surface.

Therefore, according to the second embodiment of the present invention, the following effects are obtained in addition to the effects of the first embodiment.

Notches for guiding the LAN cable to the left and right are provided in the legs of the housing, and corners are provided to maintain the minimum radius of curvature when the LAN cable is bent to the left and right. Disconnection can be prevented, and the housing can be installed in contact with the wall.

Although the description has been given of the case where the number of LAN cables is one, a plurality of LAN cables may be connected as in the first embodiment. Further, the example in which the linear portion is provided in the groove portion has been described, but the groove portion may be formed only of the curved surface portion as in the first embodiment.

FIG. 7 is a perspective view showing a third embodiment of the cable fixing structure of the present invention. The perspective view of FIG. 7 is a view as seen from the back surface of the housing 2. In addition to the structure of the first embodiment, a hook 2g is provided in the groove 2b.

FIG. 8 shows an arrow view of the leg. Where LA
When the N cable 1 is bent in the left-right direction, the contact point between the LAN cable 1 and the hook 2g is point E, and the contact point between the LAN cable 1 and the leg 2a is point F. Let L be the distance from point E to leg 2a in the longitudinal direction of hook 2g.
1. A straight line drawn from point E in the longitudinal direction of the hook 2g and F
Assuming that the distance from the point of intersection with the line drawn perpendicularly to the straight line from the point to the point F is L2, the LAN cable 1
The position of the hook 2g is determined so that the relationship with the minimum curvature radius R0 satisfies L1 ≒ L2 ≧ R0.

FIG. 9 shows a detailed view of the hook portion. The distance between the installation surface and the linear portion 2d is t1, the height of the cable holding portion of the hook portion 2g is L4, and the thickness of the locking portion 2h is h.
1. Assuming that the height from the bottom surface of the locking portion 2h to the installation surface is t2, a relationship of t1 = L4 + h1 + t2 is established. At this time, L4 ≧ d with respect to the wire diameter d of the LAN cable 1, and t2 is a distance at which the LAN cable 1 does not come off when the locking portion 2h is bent and comes into contact with the installation surface. Note that the inner width L3 of the cable holding portion of the hook portion 2g is
L3 ≧ d.

Other structures are the same as in the first embodiment.

Next, according to the third embodiment, the LAN
The fixing operation of the cable will be described. A description of the same parts as in the first embodiment will be omitted.

As shown in FIGS. 7 and 8, when the housing 2 is installed through the hooking portion 2g of the LAN cable 1, the curved surface portion 2c and L1 and L2 shown in FIG.
The minimum radius of curvature of the LAN cable 1 can be maintained no matter how it is bent right and left.

Further, by suppressing the LAN cable 1 by the hook portion 2g, the floating of the housing 2 due to the repulsive force of the LAN cable 1 is reduced.

As shown in FIG. 8, the LAN cable 1
When the force of No. 4 is applied, the load is absorbed by the contact at the points E and F in addition to the same parts as in the first embodiment.

Therefore, according to the third embodiment of the present invention, the following effects are obtained in addition to the effects of the first embodiment.

Since a hook portion for fixing the cable is provided at a position where the minimum radius of curvature of the LAN cable can be maintained.
Disconnection when the AN cable is bent right and left can be prevented. Further, since the LAN cable is suppressed by the hook portion for fixing the cable, even when the bending force of the LAN cable is large or when a plurality of LAN cables are connected, the floating of the housing due to the repulsive force of the LAN cable can be prevented.

Although the description has been given of the case where the number of LAN cables is two, as in the first embodiment, only one LAN cable or a plurality of LAN cables may be connected.
It is sufficient to install hook portions according to the number of connected units. In addition, the example in which the linear portion is provided in the groove portion has been described.
Similarly to the embodiment, the groove may be formed only by the curved surface. However, it is preferable that the hook portion is provided in the range of the linear portion because the installation is easy.

FIG. 10 is a perspective view showing a fourth embodiment of the cable fixing structure of the present invention. The perspective view of FIG. 10 is a view as seen from the back surface of the housing 2. In addition to the structure of the third embodiment, a rib 2j is provided on the leg 2a in pair with the hook 2i. In FIG. 10, the width L9 of the rib 2j
And the width L8 of the hook portion 2i is L9 ≧ L8 so that the LAN cable 1 does not come off.

FIG. 11 is a sectional view taken along the line BB 'of FIG.
When the LAN cable 1 is bent vertically downward as shown in the figure, the point of contact between the LAN cable 1 and the hook 2i is point G, and the point of contact between the LAN cable 1 and the rib 2j is point H. A line perpendicular to the installation surface from point G, and H
Assuming that the intersection of the line extending horizontally from the point to the installation surface is point I, the distance between point G and point I is L6, and the distance between point H and point I is L7, the minimum curvature of the LAN cable 1 Radius R0
Is defined as L6７L7 ≧ R0.

The hook portion 2i is provided with projections or thickened parts, and is bent when it comes into contact with the installation surface.
The AN cable 1 does not come off.

Other structures are the same as those of the first embodiment.

Next, in the fourth embodiment, the LAN
The fixing operation of the cable will be described. A description of the same parts as in the fourth embodiment will be omitted.

After the LAN cable 1 is installed through the hooks 2i and the ribs 2j and the LAN cable 1 is bent vertically downward, the L6 and L7 are secured by the positional relationship between the hooks 2i and the ribs 2j to secure the LAN cable. Keep a minimum radius of curvature of 1. Also, in FIG.
Even when the force of 5 is applied, the load is absorbed by the contact at the G point and the H point, in addition to the same parts as in the first embodiment.

Therefore, according to the fourth embodiment of the present invention, the following effects are obtained in addition to the effects of the first embodiment.

Since the hook portion and the rib for fixing the cable are provided at positions where the minimum radius of curvature of the LAN cable can be maintained, disconnection when the LAN cable is bent vertically downward can be prevented.

Although the description has been given of the case where the number of the LAN cables is two, as in the first embodiment, only one or a plurality of LAN cables may be connected.
The hooks and the ribs may be provided in accordance with the number of connected cables. Further, the example in which the linear portion is provided in the groove portion has been described, but the groove portion may be formed only of the curved surface portion as in the first embodiment. However, it is preferable that the hook portion is provided in the range of the linear portion because the installation is easy.

In these embodiments, the fixing structure of the LAN cable has been described, but the present invention can be applied to a cable that is easily bent, such as an optical fiber cable.

Further, the integrated structure in which a groove for passing a cable is formed in a part of the leg has been described. However, the structure may be separated.

[0051]

As described above, according to the present invention,
Since the radius of curvature of the LAN cable can be secured, disconnection can be prevented.

Further, since the load applied to the LAN cable can be absorbed by a portion other than the connection between the plug and the modular jack, it is possible to prevent a contact failure due to a failure of the connection.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a cable fixing structure of the present invention.

FIG. 2 is a sectional view taken along line AA ′ of FIG. 1;

FIG. 3 is an explanatory diagram showing a relationship between a weight of a housing and a cable repulsion force.

FIG. 4 is a perspective view showing a second embodiment of the cable fixing structure of the present invention.

FIG. 5 is a view of a leg according to the second embodiment as seen from an arrow.

FIG. 6 is a side view of a housing according to the second embodiment.

FIG. 7 is a perspective view showing a third embodiment of the cable fixing structure of the present invention.

FIG. 8 is a view of a leg according to a third embodiment as viewed from an arrow.

FIG. 9 is a detailed view of a hook portion.

FIG. 10 is a perspective view showing a fourth embodiment of the cable fixing structure of the present invention.

FIG. 11 is a sectional view taken along line BB ′ of FIG. 10;

FIG. 12 is a perspective view showing a conventional cable fixing structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 LAN cable 1a Plug 2 Housing 2a Leg part 2b Groove part 2c Curved surface part 2d Linear part 3 Modular jack

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4E352 AA03 AA16 BB02 BB07 CC02 CC52 DD02 DD05 DD10 DR02 DR14 DR26 GG10 5E021 FA10 FB07 FB15 FC03 FC40 GA04 GA10 5G363 AA07 BA10 DB36 DC08 5K023 BB26 CC01 JJ01 JJ06 LL06 PP06

Claims (3)

[Claims] 1. A cable fixing structure for a housing, wherein the housing is provided with a connecting portion for connecting the cable and a cable fixing portion having a groove for holding the cable, wherein the groove has a minimum curvature of the cable. A cable fixing structure for a housing, having a curved surface having a radius equal to or greater than the radius. 2. The cable according to claim 1, wherein the height of the groove is equal to or greater than the diameter of the cable, and is equal to or less than the width obtained by adding the unevenness of the cable to the diameter of the cable. Cable fixing structure of the housing. 3. A cable fixing structure for a housing according to claim 1, wherein a hook portion for holding a cable is provided in said groove.