JP2006172918A - Connector for cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connector for a cable in which a boot does not easily come off a gland nut even if a bending force is applied to a cable. <P>SOLUTION: Each of projected parts (engaged part) 4d of a boot 4 is inserted in each groove part (engaging part) 3b of a gland nut 3, and a groove part 4e of the boot is engaged with the projected part 3d of the gland nut. Then, after a cut-out part (index part) of an outer boot clamp 5 is aligned with a flat plane cut part 3a of the gland nut in the center axial direction of the cable connector, the outer boot clamp is engaged with the outer circumference face of the boot in the arrow direction. Thereby, each projected part 5c of the outer boot clamp contacts the flat plane cut part, and the inner circumference face 5b on the right-hand side than each projected part 5c depresses inward the extended part 4c of the boot. As a result, each projected part 4d is compressed and is engaged with each groove part of the gland nut. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a connector connected to a cable. More specifically, the present invention relates to a cable connector in which a boot does not come off from a holding member (such as a ground nut) even when a bending force is applied to the cable.

  A conventional waterproof connector for cables will be described (for example, see Patent Document 1).

  As shown in FIGS. 6 and 7, the waterproof connector for cables is connected to a cable 21 having a shield braid serving as a shield wire, and is provided with a conductive cylindrical barrel 22 and a coupling provided outside the cylindrical barrel 22. A housing 24 having a nut 23 is included. The coupling nut 23 is locked and coupled with one touch by being inserted into a mating connector (not shown). The cylindrical barrel 22 serves to connect the shielded wire of the cable 21 to the mating connector.

  The waterproof connector for cable further includes a connector main body 25 disposed inside the cylindrical barrel 22 and a shield disposed near the end of the connector main body 25 and the cable 21 inside the cylindrical barrel 22. Cylindrical spacer 27 having both ends fitted to part of part 26, conductive shield sleeve 28 fitting to the other part of shield part 26, bush 29 facing axially opposite shield sleeve 28, and adjacent to bush 29 Cable clamp 31, a ground nut 32 that engages the cable clamp 31 and is screwed to the outside of the cylindrical barrel 22, and an insulating boot 33 that covers the cable 21 and engages the ground nut 32 in the axial direction. Including.

  The insulator 34 of the connector main body 25 holds a plurality of conductive contacts 35, and each conductive contact 35 is connected to each core wire 36 of the cable 21.

  FIG. 8 is a schematic diagram showing a state where a bending force is applied to the cable 21 connected to the cable waterproof connector.

  The convex part of the rubber boot 33 engages with the concave part of the metal ground nut 32. When no bending force is applied to the cable 21, the casing 24 and the boot 33 of the cable waterproof connector are parallel to each other.

  However, as shown in FIG. 8, in the cable waterproof connector, when the bending force is applied to the cable 21, the boot 33 is disengaged from the ground nut 32.

JP 2004-146290 A

  The engagement structure between the boot and the ground nut in the conventional waterproof connector for cables is a simple structure in which the convex part of the rubber boot and the concave part of the metal ground nut are engaged.

  Therefore, when a bending force is applied to the cable, the boot is easily detached from the ground nut.

  Therefore, the present invention aims to provide a cable connector in which the boot is not easily detached from the ground nut even when a bending force is applied to the cable.

  The present invention employs the following means in order to solve the above problems.

  1. In the connector connected to the cable, the connector includes a holding member 3 that holds the cable, a boot having a covering portion that covers the cable, and a fixing member 5 that fixes the boot to the holding member. The holding member has an engaging portion 3b, the boot has an engaged portion 4d that engages with the engaging portion, and an engaging portion 4c1, and the fixing member engages with the boot. A cable connector having a protrusion 5c that engages with a portion, and when the fixing member is attached to the boot, the boot is clamped by the holding member and the fixing member.

  2. The cable connector according to claim 1, wherein the holding member has a protruding portion 3d, and the boot has a groove portion 4e that engages with the protruding portion of the holding member.

  3. The holding member has a flat cut portion, the fixing member has an indicator portion 5a, and when the fixing member is attached to the boot, the indicator portion is placed on the flat cut portion in the central axis direction of the connector. 2. The cable connector according to claim 1, wherein after the fitting, the protruding portion of the fixing member abuts on the flat cut portion.

  As is apparent from the description of the specification, the present invention has the following effects.

  1. Since the fixing member fixes the boot so as to engage with the holding member, the boot does not come off the holding member even if a bending force is applied to the cable.

  2. The cable bending resistance is improved only by attaching the fixing member to the boot and the holding member, so that the total length of the cable connector is not increased.

  3. Since only one fixing member is added as a new part to the cable connector, the cost is low and the structure is simple.

  A cable connector according to an embodiment of the present invention will be described.

  In the embodiment of the present invention, the description of the same points as those of the conventional cable waterproof connector will be omitted, and the differences will be described.

  A structure in which a boot is fixed to a ground nut held by a cable connector of Embodiment 1 of the present invention, that is, a main body of the cable connector, by an outer boot clamp will be described with reference to FIGS.

  First, the outline of the cable connector 1 will be described with reference to FIGS.

  FIG. 1 shows a state in which a boot 4 made of rubber or the like is engaged with a metal ground nut (holding member) 3 held by a resin casing 2 of the cable connector 1. Yes. The metal outer boot clamp (fixing member) 5 configured in a substantially cylindrical shape is not yet fitted on the outer side of the boot 4.

  In the state of FIG. 1, a U-shaped notch (indicator portion) 5 a formed at two opposing locations of the outer boot clamp 5 and a flat cut portion 3 a formed at two opposing locations of the ground nut 3. The cable connector 1 is matched in the central axis direction. Subsequently, the outer boot clamp 5 is fitted into the boot 4 in the direction of the arrow. Then, the outer boot clamp 5 reaches the mounting state shown in FIG. 2 and engages the boot 4 with the ground nut 3.

  As a result, as shown in FIG. 3, the outer boot clamp 5 presses the boot 4 against the ground nut 3. Therefore, the boot 4 is securely fixed to the ground nut 3. Therefore, even if the cable 6 covered with the boot 4 is bent, there is no problem that the boot 4 is detached from the ground nut 3.

  Next, details of the related structure of the ground nut 3, the boot 4, and the outer boot clamp 5 will be described with reference to FIGS.

  Planar cut portions 3a are formed at two opposing positions on the outer peripheral surface of the ground nut 3, and groove portions 3b are formed at two opposing locations on the outer peripheral surface of the ground nut 3 adjacent to the two flat cut portions 3a. Has been. Further, a female screw 3c is cut on one end side of the ground nut 3, and a protruding portion 3d is formed on the other end side over 360 degrees.

  The boot 4 is manufactured from rubber or elastomer, and has a substantially cylindrical covering portion 4a, a branching portion 4b that branches off from the outer peripheral surface near one end of the covering portion 4a, and extends parallel to the covering portion 4a from the tip of the branching portion 4b. The extending portion 4c is formed, and the protruding portion 4d is protruded from two opposing positions on the inner peripheral surface of the extending portion 4c. A groove portion 4e is formed between the outer peripheral surface near one end of the covering portion 4a and the inner surface of the branch portion 4b.

  The outer boot clamp 5 is manufactured from a metal material and has a substantially cylindrical shape. Projecting portions 5 c are formed at two opposing positions near the center of the inner peripheral surface 5 b of the outer boot clamp 5.

  As shown in FIG. 4, each protrusion (engaged portion) 4 d of the boot 4 is fitted into each groove (engagement portion) 3 b of the ground nut 3, and the groove 4 e of the boot 4 is protruded from the ground nut 3. Fit into part 3d. Subsequently, the notch portion (index portion) 5a of the outer boot clamp 5 is aligned with the flat cut portion 3a of the ground nut 3 in the central axis direction of the cable connector 1, and then the outer boot clamp 5 is attached to the boot 4 in the arrow direction. Fit on the outer surface. Then, the state of FIG. 5 is reached.

  In the state of FIG. 5, each protrusion 5 c of the outer boot clamp 5 abuts on each plane cut part 3 a of the ground nut 3, and the inner peripheral surface 5 b on the right side of each protrusion 5 c is inside the extended part 4 c of the boot 4. Press on. Then, each protrusion 4 d is compressed and engaged with each groove 3 b of the ground nut 3. Note that the stepped portion 5d on the right side surface of each protruding portion 5c of the outer boot clamp 5 is in contact with the distal end surface (one end surface, engaging portion) 4c1 of the extended portion 4c of the boot 4.

  Therefore, when the outer boot clamp 5 shown in FIG. 5 is attached to the boot 4 and the ground nut 3, the boot 4 does not come off the ground nut 3 even if a bending force is applied to the cable 6.

  In the first embodiment, the flat cut portion 3a, the groove portion 3b, the protruding portion 4d of the boot 4 and the protruding portion 5c of the outer boot clamp 5 are provided in two places, but one or three places. The design can be changed to provide the above.

It is a perspective view (however, the state before mounting | wearing of an outer boot clamp) of the connector for cables of Example 1 of this invention. It is a perspective view of the connector for cables. It is a front view when the cable connected to the connector for the cable is bent. It is sectional drawing (however, the state before mounting | wearing with the outer boot clamp) of the ground nut of the connector for cables, a boot, and the outer boot clamp. It is sectional drawing of the same ground nut, the same boot, and the same outer boot clamp of the connector for cables. It is sectional drawing of the conventional waterproof connector for cables. It is sectional drawing of the principal part of the waterproof connector for the cables. It is a typical front view when the cable connected to the waterproof connector for the cable is bent.

Explanation of symbols

1 Cable connector 2 Housing 3 Ground nut (holding member)
3a Plane cut part 3b Groove part (engagement part)
3c Female thread 3d Protruding portion 4 Boot 4a Covering portion 4b Branching portion 4c Extending portion 4c1 Tip surface (one end surface, engaging portion)
4d Protruding part (engaged part)
4e Groove 5 Outer boot clamp (fixing member)
5a Notch (index part)
5b Inner peripheral surface 5c Protruding part 5d Stepped part 6 Cable

Claims (3)

For connectors that connect to cables
The connector includes a holding member that holds the cable, a boot having a covering portion that covers the cable, and a fixing member that fixes the boot to the holding member.
The holding member has an engaging portion,
The boot has an engaged portion that engages with the engaging portion, and an engaging portion.
The fixing member has a protruding portion that engages with an engaging portion of the boot,
The cable connector, wherein when the fixing member is attached to the boot, the boot is sandwiched between the holding member and the fixing member.   The cable connector according to claim 1, wherein the holding member has a protruding portion, and the boot has a groove portion that engages with the protruding portion of the holding member. The holding member has a flat cut portion, the fixing member has an indicator portion, and when the fixing member is attached to the boot, the indicator portion matches the flat cut portion in the central axis direction of the connector. 2. The cable connector according to claim 1, wherein after the mounting, the protruding portion of the fixing member contacts the flat cut portion and one end surface of the boot.

Images