JP3191033U - Cable clamp device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable clamping device which can be automatically mounted on a printed circuit board and in which an optical cable once clamped cannot be easily disengaged. A cable clamp device has a base plate 11 joined to a printed circuit board and a sealing plate 13 facing the base plate via two legs 12a and 12b, and these base plates and two. The legs and the sealing plate form a clamp space for holding the optical cable 3. An insertion opening 14 for inserting an optical cable into the clamp space is formed in the sealing plate, and the insertion opening is composed of two insertion grooves 15a and 15b communicating with each other so as to intersect with each other. The optical cable can be housed in the clamp space by inserting it into the end of the insertion groove so as to intersect the insertion groove in the vertical direction and moving along the insertion groove. [Selection diagram] Fig. 2

Description

  The present invention relates to a cable clamping device for clamping an optical fiber cable (optical cable).

  In a base station or data center of an optical communication network, a switching board for switching between a main line and a sub line is used. In this switching board, a plurality of optical switching elements are arranged on a printed board, and an optical fiber cable is connected to the optical switching elements. If the optical fiber cable is bent excessively, the signal transmission characteristics change, and if damaged, the optical transmission characteristics can be fatally affected. Therefore, the bending radius of the optical fiber cable is regulated to be set to 30 mm or more, for example. For this reason, an extra length is provided in the optical fiber cable, and an appropriate bending radius is secured. On the other hand, in order to hold the pre-length of the optical fiber, a plurality of cable clamps are arranged on the printed board, and the extra cable length is held by the cable clamp device. Therefore, in the optical wiring board, development of a cable clamp device that can appropriately hold the optical fiber cable is desired.

  Conventionally, as an optical switching board or an optical wiring board that can accommodate the extra length of an optical cable, an optical wiring board in which a rail is provided on a printed board and a cable clamp is slidably attached to the rail is known (for example, Patent Documents). 1). In this optical wiring board, a rail is screwed onto a printed board, and a resin cable clamp is slidably mounted on the screwed rail. The cable clamp having a “B” cross section is formed by integrally molding an elastic resin material, and a cut is formed on one side of the clamp body. The elastic side where the cut is formed is elastically deformed and the cut is opened when the optical cable is pressed against the elastic side. Therefore, the optical cable is inserted into the inner storage space using the elastic deformation of the cut.

  As another cable clamp, a cable clamp that is formed by integrally molding an elastic resin material and in which a “B” -shaped main body and a protrusion are integrally formed is also known (for example, see Patent Document 2). In this known cable clamp, a hole is formed in the substrate, and the protrusion of the cable clamp is fitted into the substrate, thereby being fixed to the printed circuit board. Further, a notch is formed on one side of the clamp body, and an optical fiber is inserted using elastic deformation of the side where the notch is formed.

JP 2006-23591 A JP 2004-55877 A

  Since the resin cable clamp described above cannot be fixed to the printed circuit board by the soldering process, a hole is formed in the printed circuit board, and the operator is fixed by inserting the protrusion of the cable clamp into the hole of the printed circuit board. Therefore, the cable clamp cannot be automatically mounted on the printed circuit board, and there is a drawback that workability is lowered.

  In addition, even if the optical cable is once clamped, if an external stress directed upward is applied to the optical cable, the elastic resin side is easily deformed and the cut is opened, so that the optical cable is detached from the cable clamping device.

  An object of the present invention is to realize a cable clamping device that can be automatically mounted on a printed circuit board and that an optical cable once clamped cannot be easily detached.

A cable clamp device according to the present invention is a cable clamp device that is mounted on a printed circuit board and holds an optical cable,
A base that is joined to the printed circuit board and a sealing plate that faces the base via two legs, and the base, the two legs, and the sealing plate form a clamp space for storing and holding an optical cable. And
The sealing plate is formed with an insertion opening for inserting the optical cable into the clamp space,
The insertion opening includes two insertion grooves that communicate with each other so as to cross each other.

  A cable clamp device according to the present invention comprises a square tube formed by a base plate joined to a printed circuit board, two legs, and a sealing plate facing the base plate, and an internal space of the square tube. Is used as a cable clamp space (cable storage space) for storing and holding optical cables. A makeup layer for soldering is formed on the outer peripheral surface of the base plate, and an insertion opening for inserting and holding the optical cable is formed in the clamping space on the sealing plate. The insertion openings are two insertions intersecting each other. Has a groove. When inserting an optical cable, the optical cable can be accommodated in the clamp space by inserting the optical cable into the end of the insertion groove and using the edge of the insertion groove as a guide means and moving along the insertion groove. Even if an external stress is applied to the optical cable stored in the clamp space, the two insertion grooves intersect each other, so even if the stored optical cable is placed parallel to one of the insertion grooves, Since the insertion plate portion that forms the other insertion groove serves as a stopper, the risk of jumping out of the clamp space is prevented.

  Furthermore, since the sealing plate facing the base plate soldered to the printed circuit board functions as a suction area for the vacuum suction means, the cable clamping device can be soldered to the printed circuit board using an automatic mounting device. It becomes possible.

  In the cable clamp device according to the present invention, an insertion groove is formed in the upper plate of the rectangular tube body, and the optical cable is housed and held in the cable holding space via the insertion groove. At this time, the optical cable can be accommodated in the cable holding space simply by moving the optical cable along the insertion groove. In addition, the upper plate (sealing plate) prevents the stored optical cable from popping out, and also functions as an absorption attachment area for the vacuum suction means, so it can be soldered to the printed circuit board using an automatic mounting device. become.

It is a figure which shows an example of the optical switching board | substrate with which the cable clamp apparatus by this invention was mounted. It is a figure which shows an example of the cable clamp apparatus by this invention. It is a figure which shows the relationship between the extension direction of the accommodated optical cable, and the extension direction of an insertion groove. It is a figure which shows the modification of a cable clamp apparatus.

  1A and 1B are diagrams showing an example of an optical switching substrate according to the present invention. FIG. 1A is a schematic plan view, and FIG. 1B is a sectional view taken along line 1-1. The optical switching board has a printed circuit board 1, and a plurality of optical switching elements 2 for switching optical lines are arranged thereon. An optical cable 3 is connected to the optical switching element 2, and each optical cable 3 includes a sufficient length and is curved with a large radius of curvature. A plurality of cable clamping devices 4 are fixed on the printed circuit board 1, and the optical cable 3 is held by the cable clamping device 4 and fixed to the optical switching substrate. As shown in FIG. 1B, a solder layer is formed at a predetermined position of the printed circuit board 1, and the cable clamp device 4 is joined to the printed circuit board by soldering. At this time, the cable clamping device can be automatically mounted on the printed circuit board using an automatic mounting device using vacuum suction.

  FIG. 2 is a view showing an example of a cable clamp device according to the present invention, FIG. 2 (A) is a perspective view showing the entire cable clamp device, FIG. 2 (B) is a plan view, and FIG. It is the front view seen from the extension direction of the optical cable accommodated. The cable clamp device 4 according to the present invention is composed of a rectangular tube body 10 having a square cross section. The rectangular tube 10 is composed of a base plate 11 soldered to a printed circuit board, two legs 12a and 12b provided on both sides of the base plate 11, and a sealing plate 13 connected to the legs. A cable clamp space for storing and holding the optical cable 3 is formed. The rectangular tube 10 (cable clamp device) can be manufactured by bending a single brass plate.

  An insertion opening 14 for inserting the optical cable into the cable clamp space is formed in the sealing plate 13. The insertion opening 14 is composed of two insertion grooves 15a and 15b communicating with each other. The width of the insertion groove is set to be slightly larger than the outer shape of the optical cable to be held. The first insertion groove 15a extends in parallel with the extending direction of the optical cable to be accommodated, and the second insertion groove 15b intersects the first insertion groove, for example, with respect to the first insertion groove 15a. It forms so that the angle of 30 degrees may be made.

  Next, an operation for inserting an optical cable into the cable clamp space will be described. The operator holds the optical cable, and inserts the optical cable into the end of the insertion groove so as to intersect the insertion groove in the vertical direction from one end of either of the insertion grooves 15a or 15b. The optical cable is moved along the insertion groove by using the edge of the insertion groove as a guide member in a state of being fitted into the end of the insertion groove. During this movement, even at the position where the first insertion groove and the second insertion groove intersect, the optical cable can move smoothly along the insertion groove, and when it reaches the opposite end, The optical cable is completely inserted into the clamp space. Thus, by using the insertion grooves 15a and 15b as guide grooves for guiding the optical cable, the optical cable can be inserted into the cable clamp space by a simple operation.

  Next, prevention of disconnection of the stored optical cable will be described. When an external stress is applied to the optical cable stored in the cable clamp space, there is a risk that the stored optical cable may be detached from the cable clamp device through the insertion groove. The drop-off preventing action in this case will be described. 3A shows an example in which the optical cable 3 (shown by a broken line) held in the clamp space extends in parallel to the axis L and the first insertion groove 15a, and FIG. 3B shows the optical cable. An example of extending in parallel with the third second insertion groove 15b and extending so as to intersect the axis L is shown. As shown in FIG. 3A, when the optical cable being clamped is parallel to the first insertion groove 15a, there is a risk that the optical cable may be disconnected outside through the first insertion groove. However, in this case, since the first portion 13a parallel to the second insertion groove of the sealing plate 13 acts as a stopper, it is prevented from coming out of the insertion groove. In addition, as shown in FIG. 3B, when the optical cable is accommodated in parallel with the second insertion groove 15b, it can be considered that the optical cable comes off through the second insertion groove 15b. However, in this case, since the second portion 13b parallel to the axis L of the sealing plate 13 acts as a stopper, the dropout is similarly prevented. Since the two communicating insertion grooves 15a and 15b are formed so as to intersect with each other in this way, once the optical cable is stored in the cable clamp space, the sealing plate 13 acts as a stopper, and external stress It is prevented that it comes off even if it works.

  Next, automatic mounting of the cable clamp device will be described. When soldering onto a printed circuit board of a cable clamp device using an automatic mounting device, a sufficient area for mounting a vacuum pad of the automatic mounting device is required. In the cable clamp device according to the present invention, since the insertion groove provided in the sealing plate 13 is formed along the periphery of the sealing plate, an area for pressing the vacuum pad is formed in the central portion of the sealing plate. Thereby, the cable clamp device is held by the vacuum pad and can be soldered to a desired position on the printed circuit board.

  4A and 4B are diagrams showing a modification of the cable clamp device according to the present invention, in which FIG. 4A is a perspective view and FIG. 4B is a plan view. In addition, the same code | symbol is attached | subjected and demonstrated about the component same as the component used in FIG. In this example, the cable clamp device is constituted by the rectangular tube body 10. An insertion opening 21 for inserting an optical cable is formed in the sealing plate 20 facing the base plate 11. The insertion opening 21 is constituted by two insertion grooves 22a and 22b communicating with each other so as to cross each other. In this example, the two insertion grooves 22a and 22b are formed so as to form an angle of about 45 ° so as to intersect the optical cable 3 to be clamped.

  When the optical cable is accommodated in the clamp space, the optical cable is accommodated by being inserted into one end of the insertion groove so as to intersect in the vertical direction and moving along the edge of the insertion groove. Further, when the optical cable is housed and clamped, the protrusions 20a, 20b, and 20c of the sealing plate 20 function as a stopper, so that they do not jump out through the insertion groove.

  The present invention is not limited to the above-described embodiments, and various modifications and changes can be made. For example, in the above-described embodiment, the first insertion groove is formed in parallel with the extending direction of the optical cable to be clamped, but both the first and second insertion grooves are formed so as to intersect the axial direction. Can do. For example, the first insertion groove may be formed to make an angle of 30 ° with respect to the axis, and the second insertion groove may be formed to make an angle of 150 ° with respect to the axis. Further, the effect of preventing the detachment is achieved only by setting the angle of the insertion groove with respect to the axis so that at least one of the insertion grooves intersects the axis. Further, two or more insertion grooves communicating with each other can be formed as the insertion grooves forming the insertion openings.

DESCRIPTION OF SYMBOLS 1 Printed circuit board 2 Switching element 3 Cable clamp apparatus 10 Square cylinder 11 Base plate 12a, 12b Leg part 13 Sealing plate 14 Insertion opening 15a, 15b Insertion groove

Claims (6)

A cable clamping device mounted on a printed circuit board and holding an optical cable,
Clamp space having a base plate joined to the printed circuit board and a sealing plate facing the base plate via two legs, and holding the optical cable by the base plate, the two legs and the sealing plate Formed,
The sealing plate is formed with an insertion opening for inserting the optical cable into the clamp space,
The cable clamping device according to claim 1, wherein the insertion opening includes at least two insertion grooves communicating with each other so as to cross each other.   2. The cable clamp device according to claim 1, wherein the insertion opening includes a first insertion groove extending in a direction parallel to an extension direction of the optical cable to be stored and held, and a second crossing the first insertion groove. A cable clamping device having an insertion groove.   The cable clamp device according to claim 1, wherein the insertion opening has two insertion grooves extending so as to intersect with an extending direction of an optical cable to be stored and held.   The cable clamping device according to claim 1, 2, or 3, wherein the cable clamping device is formed by bending a single metal plate and is substantially rectangular as viewed in the extending direction of the optical cable to be held. A cable clamp device characterized in that is formed.   5. The cable clamp device according to claim 1, wherein a tin plating layer is formed on an outer peripheral surface of the base plate, and is soldered to the printed circuit board through the tin plating layer. 6. A cable clamp device characterized by.   The cable clamp device according to any one of claims 1 to 5, wherein an optical cable to be held is inserted from one end of the insertion groove, and is stored and held in the clamp space by moving along the insertion groove. A cable clamping device.

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