JP2016194602A - Cable device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable device capable of fixing a boot without changing the size of a connector.SOLUTION: A projection 6c is formed inside a boot 6 so that the projection 6c hangs to a protrusion 15a of a caulking ring 15 when the caulking ring 15 that tightens coatings 16, 20 of a cable 3 to crimp-fix the coatings to the outer periphery of a cable holder 13 is covered.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cable device in which a connector is attached to a terminal portion of a cable.

  In general, in a cable device, a boot is fitted to a connection portion between a connector and a cable in order to regulate the bending amount of the cable drawn from the connector. To protect the cable from damage due to excessive bending, it is necessary to secure the boot so that it does not fall out of place.

  For example, in Patent Document 1, as shown in FIG. 6, a protrusion 1001 a provided at the tip of a boot 1001 attached to the end portion of the cable 1000 and a tip of a retaining component 1002 covered by the boot 1001 are provided. A cable device in which the cable 1000 is fixed and the boot 1001 is fixed by fitting the protruding portion 1002a to the recessed portion 1003a of the connector housing 1003 is disclosed.

JP 2012-199188 A (released on October 18, 2012)

  However, in the technique disclosed in Patent Document 1, since both the boot 1001 and the retaining component 1002 are fixed by the connector housing 1003, in addition to the convex portion 1002a of the retaining component 1002, the convexity of the boot 1001 is obtained. The width of the recess 1003a of the connector housing 1003 is increased by the amount of the portion 1001a. As a result, there is a problem that the size of the connector itself increases.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a cable device that can fix a boot without changing the size of a connector.

  In order to solve the above-described problems, a cable device according to the present invention is a cable device in which a connector is attached to a terminal portion of the cable, and holds the cable in a state where the core wire of the cable is inserted inside. A holding member, one end of which is fixed to the connector, and an annular caulking member that clamps and fixes the cable cover between the outer periphery of the holding member and narrows the extra length An annular caulking member for tightening the covering from the periphery, a boot for covering at least the annular caulking member and the cable, and suppressing bending of the cable, and having an extra length of the annular caulking member The protrusion part engaged with the protrusion part formed by narrowing down is formed in the inner surface of the said boot, It is characterized by the above-mentioned.

  According to the above configuration, by engaging the protrusion formed on the inner surface of the boot against the protrusion formed when the cable cover is crimped and fixed to the outer periphery of the holding member with the annular caulking member, Boots can be fixed. For this reason, it is not necessary to form a means (groove or the like) for fixing the boot to the connector, and the connector itself can be made small. That is, it is not necessary to enlarge the connector in order to fix the boot.

  Therefore, there is an effect that the boot can be fixed without changing the size of the connector.

  By the way, even if the protrusion part formed in an annular crimp part and the protrusion part formed in a boot inner surface are hooked in one place, a boot is fixed. However, in order to fix the boot stably, it is preferable that the boot is engaged at at least two places.

  Thus, it becomes possible to stably fix the boot by increasing the number of engagement points between the boot and the annular crimping member.

  The boot is preferably formed so that the connector-side end of the boot contacts the cable-side end surface of the connector.

  According to the above configuration, the boot can completely cover the end portion of the cable, so that the appearance of the cable device can be improved.

  The boot is preferably made of an elastic material, and the end of the boot on the connector side is preferably crimped to the end surface of the connector on the cable side.

  Accordingly, even when the cable is bent, it is possible to maintain the state where the boot is in contact with the end face of the connector at the end portion of the cable, so that the connection portion between the connector and the cable is exposed at the end portion. There is nothing.

  Therefore, the appearance of the cable device can be improved.

  The present invention has an effect that the boot can be fixed without changing the size of the connector.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic structure of the cable apparatus which concerns on embodiment of this invention is shown, (a) is sectional drawing which shows a structure when cut | disconnecting by XY plane, (b) is a structure when cut | disconnecting by XZ plane. FIG. BRIEF DESCRIPTION OF THE DRAWINGS The outline of the boot of the cable apparatus shown in FIG. 1 is shown, (a) is a perspective view, (b) is the AA sectional view taken on the line of (a), (c) is a front view of (a). It is a schematic perspective view of the cable holder of the cable apparatus shown in FIG. The outline of the caulking structure of the cable apparatus shown in FIG. 1 is shown, (a) is a perspective view of a state in which the cable is held by the cable holder, and (b) is a cross-sectional view taken along line B-B in (a). . (A) (b) is a figure for demonstrating the effect of this invention. It is a plane sectional view of the conventional cable equipment.

  Hereinafter, embodiments of the present invention will be described in detail.

<Outline of cable equipment>
FIG. 1A is a cross-sectional view showing a configuration when the cable device 10 according to the present embodiment is cut along the XY plane in the drawing, and FIG. 1B is a cross-sectional view of the present embodiment. It is sectional drawing which shows a structure when the cable apparatus 10 is cut | disconnected by the XZ plane in a figure. In the figure, X indicates the cable extension direction of the cable device 10, Y in the figure indicates the parallel direction of the cable cores, and Z in the figure indicates a direction perpendicular to the X and Y directions. .

  As shown in FIGS. 1A and 1B, the cable device 10 includes a cable 3, a connector housing (connector) 5, a boot 6, a cable holder (holding member) 13, and an annular crimping ring 15. Is provided.

  The cable 3 includes optical fibers 1a to 1d, electric wires 2a and 2b, and a tensile body 16 and a sheath 20 that cover the optical fibers 1a to 1d and the electric wires 2a and 2b. Hereinafter, the optical fibers 1 a to 1 d and the electric wires 2 a and 2 b are described as “core wires” of the cable 3, and the strength member 16 and the sheath 20 are described as “covering” of the cable 3.

  In addition, the tip portion of the cable 3 is divided into a portion where the sheath (strength body 16 and the sheath 20) is peeled off and the core wires (optical fibers 1a to 1d and the electric wires 2a and 2b) are exposed, and a tip portion of the sheath. A portion where the covering is separated from the core wire is formed.

  The connector housing 5 has a hollow rectangular parallelepiped shape, and includes a front wall portion 5a, a rear wall portion 5b, a peripheral wall portion 5c, and an inner wall portion 5d. The front wall portion 5a, the rear wall portion 5b, and the inner wall portion 5d are parallel to each other, and the inner wall portion 5d is disposed between the front wall portion 5a and the rear wall portion 5b. The peripheral wall portion 5c is arranged perpendicular to the front wall portion 5a and the rear wall portion 5b. Openings 51a, 51d, and 51b are provided in the central portions of the front wall portion 5a, the inner wall portion 5d, and the rear wall portion 5b, respectively. A circuit board 52 is housed in a space between the front wall portion 5a and the inner wall portion 5d, and the opening 51a of the front wall portion 5a serves as an insertion port for a connection portion of another device.

  The boot 6 is a flexible member having a cylindrical portion 6a and a tapered portion 6b. The boot 6 is disposed so that the tip of the boot 6 (tip of the cylindrical portion 6a) is in close contact with the rear wall portion 5b of the connector housing 5. The rear end (the rear end of the tapered portion 6 b) is arranged so as to be in close contact with the outer periphery of the cable 3. Further, the boot 6 covers a portion of the tip portion of the cable 3 where the covering is split into two and the covering is separated from the core wire.

  Thereby, the boot 6 has a function of suppressing local bending of the cable 3 and also has a function of covering a portion where the coating is torn and preventing entry of foreign matters such as dust, dust, and water into the cable 3.

  The cylindrical portion 6a of the boot is provided with a convex portion (protruding portion) 6c protruding inward so as to be parallel to the rear wall portion 5b.

  The cable holder 13 includes a body portion 13b having a through hole 13a, and a flange portion 13c projecting outward from the tip of the body portion 13b along the opening edge of the through hole 13a.

  A cylindrical first straightening member 11 and a second straightening member 12 are disposed inside the through hole 13a of the body portion 13b. And while the optical fibers 1a-1d pass through the inside of the cylindrical 1st wire-shaping member 11 and the 2nd wire-shaping member 12, electric wire 2a * 2b is the outer side of the 1st wire-shaping member 11 and the 2nd wire-shaping member 12. Through.

  The flange portion 13c is fitted into a space 5e surrounded by the inner wall portion 5d and the rear wall portion 5b of the connector housing 5 and the peripheral wall portion 5c, and the body portion 13b passes through the opening 51b of the rear wall portion 5b and passes through the cylinder of the boot 6. It is stored in the part 6a. As a result, the cable holder 13 is fixed to the connector housing 5.

  In addition, the covering (strength 16 and sheath 20) of the cable 3 is crimped and crimped to the body portion 13b of the cable holder 13 by a crimping ring (annular crimping member) 15. When caulking, the extra length of the caulking ring 15 is squeezed outward, so that the covering of the cable 3 sandwiched between the outer periphery of the cable holder 13 and the caulking ring 15 is tightened from the periphery. Crimped and fixed. Thereby, the cable 3 can be fixed to the cable holder 13.

  In addition, the protrusion 15a is formed in the outer periphery of the caulking ring 15 because the extra length of the caulking ring 15 is narrowed outward.

  The caulking ring 15 is fitted to the end of the body portion 13b of the cable holder 13 (on the side opposite to the flange portion 13c), and the convex portion 6c of the boot 6 can enter between the rear wall portion 5b of the connector. As described above, it is provided at a distance from the rear wall 5b. As a result, the boot 6 is fixed to the cable holder 13 by the hooking of the projection 6c disposed between the rear wall portion 5b of the connector and the projection 15a of the caulking ring 15 to the projection 15a. Details of fixing the boot 6 to the cable holder 13 will be described later.

  The covering of the cable 3 (the tensile strength member 16 and the sheath 20) passes through the inside of the tapered portion 6b of the boot 6 and is fixed to the outer periphery of the cable holder 13 by pressure.

  Moreover, the core wire (optical fibers 1a to 1d and the electric wires 2a and 2b) of the cable 3 passes through the inside of the tapered portion 6b of the boot 6 and the through hole 13a of the cable holder 13 and the opening 51d of the inner wall portion 5d. The circuit board 52 is reached.

  The circuit board 52 includes a light receiving element that converts optical signals output from the optical fibers 1a to 1d into electric signals, and a light emitting element that converts electric signals into optical signals and inputs the optical signals to the optical fibers 1a to 1d. An active element is mounted. For this reason, the cable device 10 according to the present embodiment may be referred to as an “active optical cable”.

<Details of fixing the boot>
Details of fixing the boot 6 in the cable device 10 having the above-described configuration will be described below.

(Boots 6)
2A to 2C schematically show the boot 6 shown in FIG.

  The boot 6 is formed of a material having elasticity such as rubber, for example, and includes a cylindrical portion 6a and a tapered portion 6b as shown in FIG. As shown in FIG. 2 (a), a convex portion (projecting portion) 6c is formed inside the cylindrical portion 6a (the inner surface of the boot 6).

  As shown in FIGS. 2B and 2C, the convex portion 6c is formed on both sides in the longitudinal direction when the opening cross section of the cylindrical portion 6a is rectangular, and extends in the short direction. Yes. As shown in FIG. 1A, the protrusion 6 c is engaged with the protruding portion 15 a of the caulking ring 15, which is swaged with the sheath sandwiched around the outer periphery of the cable holder 13 accommodated in the cylindrical portion 6 a of the boot 6. It is formed as follows. Thereby, the boot 6 can be fixed.

  In addition, about the formation position of the convex part 6c in the boot 6, it is not limited to the position shown in (c) of FIG. Further, the number of convex portions 6c formed is not limited to two as described above. That is, the formation position and the number of the protrusions 6c may be formed at any position as long as the boot 6 can be fixed using the protrusion 15a of the caulking ring 15, and correspond to the protrusion 15a. It suffices if it is formed. Moreover, what is necessary is just to form 1 or more.

(Cable holder 13 (holding member))
FIG. 3 is a schematic perspective view showing the appearance of the cable holder 13.

  As shown in FIG. 3, the cable holder 13 includes a cylindrical body portion 13b having a through hole 13a, and a flange portion 13c that projects outward along a through hole opening edge on one end side of the body portion 13b. ing.

  The cable holder 13 is formed of resin, and a flange portion 13c, which is one end, is fitted and fixed in the space 5e of the connector housing 5 (connector), and functions as a holding member that holds a cable (not shown).

  The cable holder 13 clamps the body portion 13b using a crimping ring 15 to be described later and clamps the cover, thereby fixing the cable. This detailed structure will be described below.

(Casting structure)
4A and 4B show an outline of a caulking structure for covering a cable holder, in which FIG. 4A is a perspective view of a state in which the cable is held by the cable holder, and FIG. FIG.

  As shown in FIG. 4A, the cable holder 13 is covered with the cable 3 (strength body 16 and sheath 20) by the crimping ring 15 at the end of the body portion 13b opposite to the flange portion 13c. It is crimped.

  The coverings (strength body 16 and sheath 20) that are split into two at the tip of the cable 3 are respectively directed to the two straight portions of the body portion 13b having a substantially long cylindrical cross section. 15 is externally fitted. Further, crimping is performed from both side surfaces (vertical direction in FIG. 4B) so that the extra length of the caulking ring 15 is narrowed on the outer periphery of the two arc portions of the body portion 13b having a substantially long cylindrical section. . As a result, as shown in FIG. 4B, the caulking ring 15 is formed with protruding portions 15a protruding in the longitudinal direction of the cross section of the body portion 13b at the arc portions at both ends of the body portion 13b. The coating addressed to the straight portion of the portion 13b is crimped so as to be tightened from the periphery. That is, the protruding portion 15 a is formed when the caulking ring 15 is pressed from both side surfaces (vertical direction in FIG. 4B) and the covering is tightened on the cable holder 13. Therefore, the protrusion 15a is formed at two places. The projecting portion 15 a engages with the convex portion 6 c of the boot 6.

  In order to fix the boot 6 in the above-described method, it is preferable that the caulking ring 15 is caulked at a portion near the end on the opposite side of the flange portion 13c of the body portion 13b of the cable holder 13, and the end portion of the body portion 13b ( More preferably, the rear end) and the end portion (rear end) of the caulking ring 15 are substantially matched. Accordingly, a space for the convex portion 6c of the boot 6 to enter between the rear wall portion 5b of the connector housing 5 and the protruding portion 15a of the caulking ring 15 can be provided, and the tip of the boot 6 (the cylindrical portion 6a When the tip is disposed so as to be in close contact with the rear wall portion 5b of the connector housing 5, the convex portion 6c of the boot can be engaged with the protruding portion 15a.

<Manufacturing method of cable equipment>
A method for manufacturing the cable device having the above configuration will be described below.

  First, the boot 6 is temporarily attached to the cable 3. Here, the boot 6 is inserted into the cable 3 from the taper portion 6 b and waits at a position far from the end of the cable 3.

  Next, the caulking ring 15 is temporarily attached to the cable 3. Also in this case, as in the case of the boot 6, the caulking ring 15 is passed from the end of the cable 3, and is made to stand by at a position far from the end of the cable 3.

  Subsequently, the tip of the cable 3 is torn to expose the optical fibers 1a to 1d and the electric wires 2a and 2b.

  The exposed optical fibers 1a to 1d are passed through the second straightening member 12.

  The optical fibers 1a to 1d passed through the second wire-shaping member 12 and the electric wires 2a and 2b are passed through the through-hole 13a of the cable holder 13 of the cable holder 13, and the second wire-shaping member 12 is connected to one end of the through-hole 13a. Fit.

  Subsequently, the optical fibers 1 a to 1 d are passed through the first straightening member 11, and the first straightening member 11 is fitted to the other end of the through hole 13 a of the cable holder 13.

  Thereafter, the caulking ring 15 is caulked from the periphery in a state where the strength member 16 and the sheath (cover) 20 are sandwiched between the outer periphery of the body portion 13 b of the cable holder 13. At this time, as shown in FIG. 4B, protrusions 15 a are formed on both sides of the caulking ring 15.

  That is, the process so far is a process of attaching the cable holder 13 which is a holding member to the terminal part of the cable 3, and the cores (the optical fibers 1a to 1d and the electric wires 2a and 2b) of the cable 3 are connected to the body portion 13b. The cable 3 is fixed by being crimped and fixed to the outer periphery of the body portion 13b by the crimping ring 15 while being inserted and held in the through-hole 13a (inside). The cable holding process to hold | maintain is shown.

  Next, the flange portion 13 c of the cable holder 13 is fitted into the space 5 e of the connector housing 5 and attached. In this state, the optical fibers 1a to 1d exposed from the first straightening member 11 fitted in the through hole 13a of the cable holder 13, the electric wires 2a and 2b exposed from the through hole 13a, and the circuit board in the connector housing 5 52.

  Next, the resin is filled in the through hole 13 a of the cable holder 13.

  That is, in the above steps, in the cable holding step described above, after the optical fiber and the electric wire of the cable 3 held by the cable holder 13 are connected to the circuit board and aligned, the cable 3 is fixed to the cable holder 13 with resin. The fixing process is shown.

  Finally, the boot 6 is put on the caulking ring 15 so that the convex part 6 c of the boot 6 is engaged with the protruding part 15 a of the caulking ring 15.

  That is, in the process up to here, the boot 6 covers the caulking ring 15 in a state where the covering of the cable 3 (strength body 16 and sheath 20) is tightened around the outer periphery of the body portion 13b of the cable holder 13 in the cable holding step. It is a boot mounting process. Then, when the crimping ring 15 is covered, the projection 6 c that is a projection formed inside the boot 6 is engaged with the protrusion 15 a formed on the crimping ring 15.

  Through the above steps, an active optical cable to which the boot 6 is fixed is formed.

<How to Abut the Boot 6 to the Connector Housing 5>
The boot 6 not only functions to suppress excessive movement of the cable 3 but also functions to improve the appearance of the end portion of the cable 3 on the connector housing 5 side. That is, when the cable holder 13 is swaged by the swaged ring 15 and the cable holder 13 is exposed to the outside, the end portion deteriorates in appearance. Therefore, when the boot 6 is attached to the cable 3, the end of the boot 6 on the connector housing 5 side (end of the tubular portion 6 a) is the end surface (rear wall portion) of the connector housing 5 on the cable 3 side. 5b). Thus, the boot 6 can completely cover the end portion of the cable 3 (connection portion between the cable 3 and the connector housing 5).

  Further, the boot 6 is formed of an elastic material (such as rubber) as described above, and the end of the boot 6 on the connector housing 5 side (the end of the cylindrical portion 6a) is the cable of the connector housing 5. It is preferably formed so as to be pressure-bonded to the end surface on the 3 side (rear wall portion 5b). The boot 6 having this configuration is designed as follows.

  The boot 6 includes a protrusion 6c formed on the inner surface of the boot 6 and a protrusion 15a of the crimping ring 15 from an end of the boot 6 on the connector housing 5 side (an end of the cylindrical portion 6a). Are designed to be longer than the length from the contact surface of the crimping ring 15 to the end surface (rear wall portion 5b) of the connector housing 5 on the cable 3 side. When the boot 6 comes into contact with the end face, the boot 6 is compressed by the elastic force of the boot 6 so that an urging force can be applied (bonded) to the end face.

<Effect>
The effect of the cable device having the above configuration will be described below with reference to FIGS. Here, FIG. 5A is a diagram showing a boot fixing structure in the cable device of the present embodiment, and FIG. 5B is a diagram showing a boot fixing structure in the conventional cable device.

  Here, the caulking ring is a part for pressing and fixing the covering (strength body 16 and sheath 20) to the outer periphery of the body portion 13b, and is thus arranged outside the connector housing.

  Therefore, in this embodiment, as shown in FIG. 5A, the boot is fixed to the caulking ring, so that it is not necessary to fix the boot in the connector housing. Thereby, only the space (groove) 5e for accommodating the flange portion 13c of the cable holder may be provided in the connector housing. In this case, the width of the space provided in the connector housing is W1.

  On the other hand, conventionally, as shown in FIG. 5B, the boot is fixed to the connector housing. For this reason, in addition to the space for accommodating the flange portion 13c of the cable holder, the connector housing requires a space for hooking the boot. The two spaces are combined into one space, and the width of the space provided in the housing in this case is W2.

  If the width of the space required to accommodate the flange portion of the cable holder is the same in both FIGS. 5A and 5B, the width W1 of the connector housing space in the boot fixing structure of this embodiment is The space width W2 of the connector housing in the conventional boot fixing structure is narrower by the width of the space for hooking the boot. For this reason, since the connector housing length can be shortened, the connector housing itself can be made small. On the contrary, in the conventional boot fixing structure, since the width of the space is widened, the length of the connector housing becomes long and the connector housing itself becomes large.

  As described above, according to the cable device boot fixing structure of the present embodiment, the boot can be fixed without changing the size of the connector housing.

  In the present embodiment, as an example of the cable device of the present invention, the cable device in which the connector is attached to the composite cable including the optical fiber and the electric wire has been described. However, the present invention is not limited to this, and only the optical cable is used as the cable. Any cable device may be used as long as it is a cable device in which a boot is mounted between the connector and the cable.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used for a cable device that needs to be fitted with boots.

1a to 1d optical fiber (core wire)
2a, 2b Electric wire (core wire)
DESCRIPTION OF SYMBOLS 3 Cable 5 Connector housing 5a Front wall part 5b Rear wall part 5c Peripheral wall part 5d Inner wall part 5e Space 6 Boot 6a Tube part 6b Tapered part 6c Convex part 10 Cable apparatus 11 1st wire arrangement member 12 2nd wire arrangement member 13 Cable holder (Holding member)
13a Through hole 13b Body part 13c Flange part 15 Caulking ring (annular caulking member)
15a Protrusion 16 Strength member (coating)
20 Sheath (coating)
51a opening 51b opening 51d opening 52 circuit board

Claims (4)

A cable device with a connector attached to the end of the cable,
A holding member for holding the cable in a state where the core of the cable is inserted inside, a holding member having one end fixed to the connector;
An annular caulking member that clamps and fixes the cable covering between the outer periphery of the holding member and tightens the covering from the periphery by fixing the excess length to fix the cable to the holding member. An annular caulking member;
A boot for covering at least the annular crimping member and the cable and suppressing bending of the cable;
A cable device characterized in that a protrusion that engages with a protrusion formed by narrowing the extra length of the annular crimping member is formed on the inner surface of the boot.   The cable device according to claim 1, wherein at least two protrusions are formed, and at least two protrusions are formed.   The cable device according to claim 1, wherein the boot is formed such that an end portion on the connector side of the boot comes into contact with an end surface on the cable side of the connector.   The cable device according to claim 3, wherein the boot is made of an elastic material, and an end portion of the boot on the connector side is crimped to an end surface of the connector on the cable side.

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