JP4599658B2 - Cable clamp device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cable clamp device with improved pullout strength.
[0002]
[Prior art]
Conventionally, as this type of cable clamping device, for example, one disclosed in Japanese Utility Model Publication No. 62-118485 is known.
[0003]
As shown in FIGS. 9 to 11, the cable clamp device of the above publication is provided with a plurality of substantially semi-circular cutouts c on both side edges of the long side portion b of the clamp body a formed in an approximately L shape. A plurality of string insertion holes are formed at intervals in the longitudinal direction of the side b, and are formed by a stop string e hooked in an X shape in the notch c and a stop string f inserted in the string insertion hole d. Different types of cables g and h can be fixed to the clamp body a.
[0004]
[Problems to be solved by the invention]
However, in the conventional cable clamp device, when a round cable g having a circular cross section, for example, is fixed with a stop string e hooked in an X shape on the notch c, the stop string e is strongly tightened so that the stop string e is shown in FIG. Even if the round cable g is bitten into the outer peripheral surface of the round cable g, the biting direction is not perpendicular to the axis of the round cable g. Therefore, when a pulling force is applied to the round cable g, the round cable g is displaced from the clamp body a. In other words, there is a drawback in that a tensile force is applied to the connector attached to the round cable g and the connector is disconnected.
[0005]
In particular, in the case of a round cable g with a small diameter, since the amount of biting of the stopper string e is small, the pull-out strength is weak and also when the flat cable h is fixed to the clamp body a with the stopper string f, the stopper attached to the flat cable h. Since the amount of biting of the string f is small, there is a drawback that a large pulling strength cannot be obtained.
[0006]
The present invention has been made to remedy such conventional drawbacks, and an object of the present invention is to provide a cable clamping device that can improve the pull-out strength of the cable and can be easily fixed.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a cable clamp device according to the present invention is a cable clamp device for fixing a cable to a case of an electronic device, the cable clamp body having a cable fixing portion formed in a V shape, and the cable fixing portion. And a tongue that is formed so as to be cut and raised from one inclined portion of the cable fixing portion and continuous with the other inclined portion at the top portion. When the cable is fixed to the cable fixing portion by the retaining strap, the tip of the tongue piece is configured to bite into the cable .
[0018]
With the above configuration, when the cable is fixed to the cable fixing portion with the fastening strap, the edge bites into the cable, so that the pulling strength can be improved.
[0019]
In order to achieve the above object, the cable clamping device of the present invention is such that the tongue piece is protruded from the apex portion by raising the tongue piece from one inclined portion of the cable fixing portion.
[0020]
With the above-described configuration, when the cable is fixed to the cable fixing portion with the retaining strap, the tip of the tongue piece bites into the cable, so that the pull-out strength can be improved.
[0021]
In order to achieve the above object, the cable clamping device of the present invention is such that a semicircular edge is formed in each inclined portion by opening a round hole across the inclined portion at the top of the cable fixing portion. .
[0022]
With the above configuration, when the cable is fixed to the cable fixing portion with the fastening strap, the edge of the round hole bites into the cable, so that the pull-out strength can be improved.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described in detail with reference to the drawings shown in FIGS.
[0024]
1 is a perspective view of an electronic apparatus using the cable clamp device of the present invention, FIG. 2 is a plan view of a state in which a cable is fixed to the cable clamp device, and FIG. 3 is a front view thereof.
[0025]
A plurality of terminals 3 for connecting the cable 2 are provided on the rear surface of the case 1 of the electronic device.
[0026]
The cable 2 has a structure in which a plurality of core wires 2 a are bundled and covered with a cylindrical covering material 2 b, and a cable clamp body 4 for fixing the cable 2 is installed on the side of the terminal 3.
[0027]
The cable clamp body 4 is formed by bending a band-shaped metal plate to form a cable fixing portion 4c composed of substantially V-shaped inclined portions 4a and 4b, and a flat plate formed at the ends of the inclined portions 4a and 4b. The mounting portion 4d is fixed substantially horizontally to the rear surface of the case 1 by fixing means such as spot welding.
[0028]
Both sides of the inclined portions 4a and 4b of the cable clamp body 4 are cut out with a width W3 from the substantially middle portion to the mounting portion 4d, and the inclined portions 4a and 4b with respect to the width W1 on the top portion 4e side of the cable fixing portion 4c. The width W2 from the substantially middle portion to the mounting portion 4d is narrowed. As a result, locking step portions 4f are formed on both sides of the inclined portions 4a and 4b as shown in FIG. A stopper string 6 for fixing the cable 2 to the cable fixing portion 4c of the cable clamp body 4 is locked to the portion 4f.
[0029]
Next, the operation of the cable clamp device constructed as described above will be described. Each core wire 2a of the cable 2 is connected to the terminal 3 provided on the rear surface of the case 1, so that the cable 2 can be connected to the cable 2 during use of the electronic device. The cable 2 is fixed to the rear surface of the case 1 so that the pulling force that acts is not directly applied to the connection portion between the terminal 3 and the core wire 2a.
[0030]
In fixing the cable 2, first, as shown in FIG. 1, when two straps 6 are inserted into the gap 7 formed between the V-shaped cable fixing portion 4 c of the cable clamp body 4 and the rear surface of the case 1, In this state, the cable 2 is placed along the outer surfaces of the inclined portions 4a and 4b of the cable fixing portion 4c, and the cable 2 is fixed to the inclined portions 4a and 4b of the cable fixing portion 4c by the straps 6 as shown in FIG. .
[0031]
At this time, the cable 2 is crimped to the inclined portions 4a and 4b of the cable fixing portion 4c by strongly tightening the retaining strap 6, and at the same time, the trough portion of the cable 2 in which the top portion 4e of the cable fixing portion 4c is bent into a V shape Therefore, a large frictional force is generated between the cable fixing portion 4c and the cable 2, and the pull-out strength of the cable 2 can be greatly improved.
[0032]
Further, since the stop strap 6 for fixing the cable 2 to the cable fixing portion 4c is locked to the locking step portions 4f on both sides of the inclined surfaces 4a and 4b, even if a large tensile force X is applied to the cable 2, the locking strap 6 is locked. Since the stepped portion 4f prevents the stopper strap 6 from moving, the cable 2 can be firmly fixed to the cable fixing portion 4c.
[0033]
When the cable 2 is a coaxial cable or the like, if the cable 2 is bent at R smaller than the minimum allowable bending radius R, the electrical characteristics of the coaxial cable are impaired. As shown in FIG. 4, the top portion 4e of the cable fixing portion 4c may be a curved portion having a radius equal to or greater than the minimum allowable bend R, and the frictional force between the top portion 4e and the cable 2 is slightly reduced, but the retaining strap 6 is not locked. Sufficient pulling-out strength is obtained because the cable 2 is prevented from shifting by being locked to the portion 4f.
[0034]
Further, by changing the width W3 of the notch in accordance with the diameter of the cable 2 to be fixed, a plurality of types of cable clamp bodies 4 in which the width W2 of the cable fixing portion 4c is changed are manufactured, and these cable clamp bodies 4 are shown in FIG. As described above, when the fixing device 8 such as a screw is selectively attached to the case 1, the optimum pulling strength can be obtained according to the diameter of the cable 2.
[0035]
In this case, when the diameter of the cable 2 to be fixed is changed, there is an advantage that the cable clamp body 4 can be removed from the case 1 and can be easily replaced with one that matches the diameter of the cable 2 to be fixed. By changing the width W3 of the notch to make the width W2 of the cable fixing portion 4c smaller than the outer diameter of the cable 2 to be fixed, a greater pulling strength can be obtained when the retaining strap 6 is tightened.
[0036]
On the other hand, FIGS. 6 to 8 show a modification of the cable clamp body 4 and will be described next.
[0037]
In addition, the same part as the said embodiment attaches | subjects the same code | symbol, and abbreviate | omits the description.
[0038]
In the modification shown in FIGS. 6A and 6B, the rectangular clamp hole 4g is opened at the top portion 4e of the cable clamp body 4, and the stop hole 4g is formed from the top portion 4e to one inclined portion 4a. As a result, the edge 4h of the other inclined portion 4b protrudes from the top portion 4e. Therefore, when the cable 2 is fixed to the cable fixing portion 4c by the retaining strap 6, the edge 4h bites into the cable 2, so that the pulling strength is high. Improvement can be achieved.
[0039]
Further, in the modification shown in FIGS. 7A and 7B, the tongue piece 4i is cut out from one inclined portion 4a of the cable fixing portion 4c, and the tongue piece 4i continuous with the other inclined portion 4b at the top portion 4e. When the cable 2 is fixed to the cable fixing portion 4d by the stopper string 6, the tip of the tongue piece 4i bites into the cable 2, so that the pulling strength can be improved.
[0040]
In the embodiment and the modified examples, the cable clamp body 4 is formed of a metal plate, but may be formed of a synthetic resin.
[0041]
【The invention's effect】
As is apparent from the description of the embodiments, the present invention is a cable clamp device for fixing a cable to a case of an electronic device, the cable clamp main body having a cable fixing portion formed in a V shape, and the cable fixing portion. And a tongue that is formed so as to be cut and raised from one inclined portion of the cable fixing portion and continuous with the other inclined portion at the top portion. When the cable is fixed to the cable fixing portion by the retaining strap, the tip of the tongue piece is configured to bite into the cable, so that the biting into the cable is strengthened by the tongue piece and the hole generated by the tongue piece being raised and raised. In addition, the pulling strength can be improved with a small number of parts .
[0042]
【The invention's effect】
As described above in detail, according to the present invention, a cable clamp device for fixing a cable to a case of an electronic device or the like includes a cable clamp body having a cable fixing portion formed substantially in a V shape, and a cable along the cable fixing portion. Because the cable is bent into a V shape and crimped to the cable fixing part at the same time that the top bites into the cable. A large frictional force is generated between the cable fixing part and the cable, which can greatly improve the pull-out strength of the cable, and stop in the gap formed between each inclined part of the cable fixing part and the case. Since the cable can be fixed simply by passing the string, the cable can be fixed easily in a short time.
[Brief description of the drawings]
FIG. 1 is a perspective view of an electronic apparatus using a cable clamp device according to an embodiment of the present invention. FIG. 2 is a plan view of the cable clamp device according to an embodiment of the present invention. FIG. 4 is a plan view showing a modification of the cable clamp device according to the embodiment of the present invention. FIG. 5 is a modification of the cable clamp device according to the embodiment of the present invention. FIG. 6A is a front view showing a modification of the cable clamp device according to the embodiment of the present invention. FIG. 6B is a cross-sectional view taken along line AA in FIG. (A) Front view showing a modified example of the cable clamp device according to the embodiment of the present invention (b) Cross-sectional view taken along line BB of (a) in FIG. 7 [FIG. 8] (a) Implementation of the present invention FIG. 8 is a front view showing a modification of the cable clamp device according to the embodiment (b). FIG. 9 is a perspective view of a conventional cable clamp device. FIG. 10 is a plan view of the conventional cable clamp device. FIG. 11 is a cross-sectional view taken along line DD in FIG. Figure [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Case 2 Cable 4 Cable clamp main body 4a, 4b Inclined part 4c Cable fixing | fixed part 4e Top part 4f Locking step part 4g Stop hole 4h Edge 4i Tongue piece 4k Edge 6 Stop string 8 Fixing tool

Claims (1)

A cable clamp device for fixing a cable to a case of an electronic device,
A cable clamp body having a cable fixing portion formed in a V shape;
A cable that runs along the cable fixing portion, and a strap that fixes the cable fixing portion to the cable fixing portion ,
A tongue piece formed by cutting from one inclined portion of the cable fixing portion and continuing to the other inclined portion at the top ;
With
A cable clamp device characterized in that when the cable is fixed to the cable fixing portion by the retaining strap, the tip of the tongue piece bites into the cable.

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