JP2000188164A - Rotary connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary connector that can securely cut a flexible cable of which neutral position adjustment is incorrect in a test at delivery and can easily be assembled at a low cost. SOLUTION: This rotary connector is composed of a pair of housings which are concentrically arranged and mutually rotatably joined to each other, and a flexible cable 14 that is so received in a space formed between the pair of housings as to be able to be reeled in and out. A lead block 12 is connected to an end of the flexible cable 14, and a lead block receiving part 22 for removably retaining the lead block 12 and a cable introducing part 23 communicating with it are arranged in the housing. A part of the housing constituting the tip part of the cable introducing part 23 is tilted with respect to the widthwise direction of the flexible cable. Thereby, the tension acting on the flexible cable is concentrated on a part of conductors, to easily be cut.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary connector which is incorporated in a steering device of a vehicle and electrically connects an electric device arranged on a rotor side to an electric device arranged on a stator side.

[0002]

2. Description of the Related Art A rotary connector of this kind is mainly composed of a pair of housings which are arranged concentrically and connected to each other so as to be relatively rotatable, and are wound or wound in a space formed between the pair of housings. The flexible cable is removably housed, and both ends of the flexible cable are fixed to the respective housings and then electrically led out. Of the pair of housings, one housing is used as a movable body, and the other housing is used as a fixed body.When the movable body side housing is rotated clockwise or counterclockwise, a flexible cable is wound or tightened in a space. It is designed to be rewound.

[0003] In the rotary connector thus configured, the housing on the fixed body side is fixed to the steering column of the steering device, the housing on the movable body side is fixed to the steering wheel, and both ends of the flexible cable are connected to the steering column side and the steering wheel. By connecting to an electric device arranged on the side, it is used as an electric connection means such as an air bag system or a horn circuit. In recent years, a rotary connector of a type that connects a flexible cable and an electric device disposed on a steering column side or a steering wheel side via a lead wire has become mainstream. Has a configuration in which a cable connector called a lead block is connected to an end of a flexible cable, and the lead block is fixed to a movable or fixed side housing.

[0004] Incidentally, since the rotary connector is mounted on the steering device of the vehicle, it must not hinder the rotation of the steering wheel. The length of the flexible cable provided in the rotary connector is set such that a larger amount of tightening or rewinding than the rotatable amount of the steering wheel can be obtained. If the rotating connector set at the neutral position in the winding direction or the unwinding direction is attached to the steering device set at the neutral position in the rotating direction, the rotating connector may hinder the rotation of the steering wheel. Absent.

Therefore, in order to surely ship a rotary connector whose movable side housing is set to a neutral position in the direction in which the flexible cable is wound or unwound, a manufacturer of the rotary connector is required to carry out all of the operations before shipping. Rotational characteristics of a rotary connector that is mounted on a test device equipped with the same steering device as the applicable vehicle, rotates the steering wheel within its movable range, and checks whether the steering wheel can be properly rotated. A test and an electrical characteristic test for confirming whether or not a disconnection has occurred in the rotary connector after the test are performed.

[0006] However, as a result of conducting a rotation characteristic test, a rotating connector in which an abnormal tension acts on a flexible cable is
If the tension is relatively small, it may be overlooked and pass the test. In addition, even in the case of a rotating connector in which abnormal tension acts on a flexible cable,
If there is no disconnection, pass the electrical characteristics test. As described above, even in the case of a rotating connector in which an abnormal tension acts on the flexible cable in the rotating characteristic test, shipment must be prevented beforehand in order to prevent disconnection or the like after mounting on the actual vehicle.

Conventionally, in order to cope with such a demand, as disclosed in Japanese Utility Model Laid-Open No. 25687/1993, a connecting portion between a flat cable (flexible cable) and another conductor is provided with a movable side. There has been proposed a brushless electric signal transmission device (rotary connector) including a conductor connection portion that is disconnected by excessive rotation of the housing. According to this device, if an abnormal tension is applied to the flexible cable in the rotation characteristic test, the flexible cable comes off from the conductor connection part, so that the disconnection can be reliably grasped by the subsequent electrical characteristic test. Therefore, it is possible to prevent an inappropriate rotation connector from being shipped.

[0008] As another means for meeting the demand, a cutter is provided at a portion of the housing that contacts the flexible cable, and when an abnormal tension acts on the flexible cable in the rotation characteristic test, the cutter is provided. A technique of cutting a flexible cable with a cutter has also been proposed.

[0009]

However, of the means for preventing the shipment of an illegal rotating connector which has been proposed in the past, the former means via a conductor connecting portion which easily disconnects a flexible cable from another conductor. The connection between the flexible cable and other conductors is easily disconnected during assembly and handling of the rotating connector, making it difficult to assemble the rotating connector and incorporate it into an actual vehicle with high efficiency. There's a problem. Further, since the flexible cable is easily detached from other conductors due to the vibration of the vehicle, there is also a problem that reliability after mounting on the actual vehicle is poor.

[0010] On the other hand, of the means for preventing shipment of an illegal rotating connector proposed in the past, the latter has a cutter in the housing, so that the number of parts is increased and the rotating connector is expensive. In addition, there is a problem that an operator is likely to be injured while assembling the rotary connector. Further, since the flexible cable and the cutter may come into contact with each other due to the vibration of the vehicle, the flexible cable is easily damaged, and the reliability after mounting on the actual vehicle is also impaired.

SUMMARY OF THE INVENTION The present invention has been made to solve such a deficiency of the prior art, and an object thereof is to provide a flexible cable in which adjustment of a neutral position is inappropriate in a test at the time of shipment. Is to provide a rotary connector that can be cut reliably and that can be easily assembled at low cost.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention firstly comprises a pair of housings arranged concentrically and connected to each other so as to be relatively rotatable, and a pair of these housings. A flexible cable housed in a space formed between the flexible cable and the flexible cable, the lead cable being connected to an end of the flexible cable, and the housing being provided with a lead block. A lead block storage part for detachably holding the lead block and a cable introduction part communicating with the lead block storage part are provided, and a part of the housing constituting the distal end of the cable introduction part is moved in the width direction of the flexible cable. We took the measure of tilting it.

Secondly, a pair of housings are arranged concentrically and connected to each other so as to be relatively rotatable, and are housed in a space formed between the pair of housings so as to be able to be tightened or unwound. A flexible cable, a lead block connected to an end of the flexible cable, and a rotary connector having a lead block storage portion and a cable introduction portion formed in the housing. The flexible cable thus obtained is folded back in the lead block storage section and connected to the lead block.

Thirdly, in the rotary connector according to the first means, a means is added in which the flexible cable introduced from the cable introduction section is folded back in the lead block storage section and connected to the lead block.

When the flexible cable wound and housed in the space of the rotary connector is wound up to the winding end or the rewinding end, the flexible cable of the cable introduction portion provided in the fixed or movable side housing. The tip portion is bent at an acute angle, and tension is applied to a connection portion with the lead block.
Since the flexible cable and the lead block are firmly fixed to some extent, even if the flexible cable is pulled uniformly in the width direction, the conductor cannot be easily cut.

However, when the distal end of the cable introduction portion is inclined with respect to the width direction of the flexible cable as in the first means, when the tension is applied to the flexible cable, the tension is applied. Since the conductor can be concentrated on one side in the width direction of the flexible cable, the conductor can be easily cut.

On the other hand, when the flexible cable is connected to the lead block in a state where the end of the flexible cable is straightened,
If the flexible cable is pulled uniformly in the width direction, the conductor cannot be easily cut as described above.However, when the distal end of the flexible cable is turned 180 degrees and connected to the lead block, When the flexible cable is pulled in its longitudinal direction, a moment in the direction of peeling off the connection can be applied to the connection between the flexible cable and the lead block. Even if the connection portion is pulled uniformly in the direction, the connection portion can be easily cut. When these means are combined, the conductor of the flexible cable is more easily cut.

Therefore, according to these means, it is possible to prevent the shipment of the rotary connector whose neutral position is not properly set, to simplify the work of assembling the rotary connector into the actual vehicle, and to prevent the occurrence of trouble after the actual vehicle is mounted. Can be achieved.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a rotary connector according to the present invention will be described below with reference to FIGS. FIG. 1 is a plan view of a rotary connector according to the embodiment,
FIG. 2 is a bottom view of the rotary connector, and FIG.
FIG. 4 is a perspective view showing a configuration of a flexible cable and a lead wire connected via a lead block, and a lead block storage section and a cable introduction section formed in a second housing, and FIG. 2 is an inner view showing a shape of a distal end portion of a cable introduction portion formed in a housing, FIG. 6 is an exploded view showing a method of connecting a flexible cable and a lead wire via a lead block, and FIG. 7 is in a neutral position. FIG. 8 is a plan view of a main part of the rotary connector showing a winding state of the flexible cable, FIG. 8 is a plan view of a main part of the rotary connector showing a winding state of the flexible cable wound up to the winding end, and FIG. FIG. 10 is a plan view of a main part of the rotary connector showing a winding state of the flexible cable wound up to the rewind end. FIG. 10 is an internal view of a main part of a second housing showing an effect of the rotary connector according to the embodiment. It is.

1 to 3, reference numeral 1 denotes a first housing, and reference numeral 2 denotes a second housing. In the present embodiment, the first housing 1 is used as a movable member, and the second housing is used. 2 is used as a fixed body.

The first housing 1 has a center hole 3 in the center.
And a plurality of slits 5 a extending in the axial direction of the center hole 3 at the lower portion of the inner cylinder 5. Are formed, and a snap claw 5b is formed at the lower end of the inner cylindrical body 5. A projection 4a is integrally formed on the top plate 4, and a cover 6 is attached to one side of the projection 4a. A lead block 7 is housed inside the projection 4a and the cover 6. Fixed. A plurality of lead wires 8 are connected to the lead block 7, and each lead wire 8 is led out of the first housing 1, and an external connector (not shown) is attached to the end thereof.

On the other hand, the second housing 2 is composed of a bottom plate 10 having a guide hole 9 at the center and an outer cylinder 11 rising from the outer peripheral edge of the bottom plate 10.
The outer cylinder 11 and the outer cylinder 11 are joined and integrated by means such as heat shrinkage. Also, a protruding portion 11a is formed integrally with a part of the outer cylinder 11, and the lead block 12 is housed and fixed inside the protruding portion 11a. A plurality of lead wires 13 are connected to the lead block 12, and each lead wire 13 has an external connector (not shown) attached to its tip from the second housing 2 to the outside.

First housing 1 and second housing 2
As shown in FIG. 3, assembling is performed by snapping the snap claws 5 b of the inner cylindrical body 5 into the guide holes 9 of the bottom plate 10. By doing so, the outer peripheral edge of the top plate 4 is slidably inserted into the upper end of the outer cylinder 11 and the lower end of the inner cylinder 5 is slidably inserted into the guide hole 9. The housing 1 and the second housing 2 are connected concentrically and relatively rotatably. A ring-shaped space is formed between the two housings 1 and 2 which are assembled concentrically with each other. In this space, a flexible cable 14 and a winding pattern of the flexible cable 14 are regulated. The moving body 30 is stored. The moving body 30 includes a ring-shaped rotating plate 31 and a plurality of rollers 32 rotatably mounted on the rotating plate 31. Both ends of the flexible cable 14 are connected to the lead block 12.
Connected to. The structure of the flexible cable 14 and the lead block 12, the method of connecting the flexible cable 14 and the lead wires 8 and 13 using the lead block 12, and the first and second housings 1 and 2 are formed. The configurations of the connector storage section and the cable introduction section will be described later in detail.

The rotary connector thus configured is used by being incorporated into a steering device (not shown) of the vehicle. At this time, the second housing 2 is attached to a stator member such as a steering column and the like. The lead wire 13a led out of the housing is connected to an airbag circuit or the like arranged on the vehicle body via an external connector (not shown). The first housing 1 is attached to a steering wheel, and a lead wire 8 led out of the first housing 1 is connected to an airbag inflator mounted on the steering wheel via an external connector (not shown). And so on. Then, in use, when the first housing 1 rotates, for example, clockwise in conjunction with the rotation operation of the steering wheel, the flexible cable 14 is wound around the outer peripheral surface of the inner cylindrical body 5, and conversely, When the first housing 1 rotates counterclockwise in conjunction with the rotation operation of the steering wheel, the flexible cable 14 is rewound on the inner peripheral surface of the outer cylinder 11.

Next, the structure of the flexible cable 14 and the lead block 12, the method of connecting the flexible cable 14 and the lead wires 8 and 13 using the lead block 12, and the first and second housings 1 and 2 will be described. The configuration of the lead block storage section and the cable introduction section formed in FIG. 2 will be described with reference to FIGS. 4 to 6, taking the outer end side of the flexible cable as an example.

As shown in FIG. 6, the flexible cable 1
Reference numeral 4 denotes a belt-like body formed by laminating a plurality of conductors 16 parallel to each other with a pair of insulating films 15, and in this embodiment, has a configuration for three circuits including three conductors 16. At the outer end of the flexible cable 14, each conductor 16 is exposed by removing only one surface of the insulating film 15, but a pair of positioning holes are provided near the end of the insulating film 15 remaining on only one surface. 15a are formed, and cutouts 15b are formed on both side surfaces of the insulating film 15 located before the end of the insulating film 15. The lead wire 13 is also called a round cable, and the stranded wire 13b is covered with a cylindrical insulating tube 13a.

On the other hand, the lead block 12 is composed of an insulating resin body 18 and a plurality of joint bars 19 supported inside the resin body 18. In this embodiment, Three joint bars 19 are used corresponding to the number of conductors 16 of the flexible cable 14.
Each joint bar 19 is made of a copper material or the like having excellent conductivity, has a rectangular cross section, and has flat front and back surfaces. A first window 20 and a second window 21 are opened in the resin body 18 and these windows 20 and 2 are opened.
The joint bar 19 is exposed from the first and second window holes 20 and 21. The first window is one continuous hole,
The second window holes 21 are isolated from each other by the resin body 18, and a concave groove 18 b is formed from each of the second window holes 21 to one end surface of the resin body 18. Each joint bar 19
Are set at substantially the same pitch as the interval between the conductors 16 provided on the flexible cable 14.

When connecting the flexible cable 14 and the lead wire 13 to the lead block 12, first, the flexible cable 14 is placed on the lead block 12, and the positioning holes 15 a are formed in the protrusions 18 a of the resin body 18. Insert As a result, the flexible cable 14 is positioned with respect to the lead block 12, and each conductor 16 is superimposed on the flat surface of each joint bar 19 in the first window hole 20. Thereafter, a welding jig (not shown) is brought into contact with the overlapping portion of each conductor 16 and the joint bar 19 using the first window hole 20, and the two members are ultrasonically welded. Next, the insulating tube 13a of each lead wire 13 is fitted into the concave groove 18b of the lead block 12, and the tip of the stranded wire 13b is superimposed on the flat surface of each joint bar 19 in the second window hole 21. Then, using the second window hole 21, a welding jig (not shown) is brought into contact with the overlapping portion between the stranded wire 13b of each lead wire 13 and the joint bar 19, and these two members are ultrasonically welded.

As shown in FIG. 4, the lead block 12 and the flexible cable 14 connected in this manner are connected to the lead block housing 2 formed in the second housing 2.
2 and the cable introduction part 23 communicating therewith. As shown in FIG. 4, guide protrusions 22 a are formed on the inner wall of the lead block housing portion 22 in the depth direction thereof, and the groove 1 formed on the back surface of the resin body 18 is formed.
By pressing the guide block 8c along the guide protrusion 22a, the lead block 12 can be reliably positioned at a predetermined position in the lead block storage section 22. on the other hand,
As shown in FIG. 5, the distal end of the cable introduction section 23 is positioned in the height direction of the cable introduction section 23 (the flexible cable 14).
Of the flexible cable 14
It is configured to contact only the upper side of.

The lead block 12 and the flexible cable 14
After each is stored, the bottom plate 10 is put on the lower surface of the outer cylindrical body 11, and the bottom plate 10 and the outer cylindrical body 11 are joined by means such as heat squeezing while the lead wire 13 is led out from the bottom plate 10. The lead block 12 is housed and fixed in the protrusion 11a of the second housing 2.

Although the detailed description of the inner end side of the flexible cable 14 is omitted, except that the storage position of the lead block 7 is between the protruding portion 4a and the cover 6, It is configured similarly to the connection structure on the side.

In the rotary connector configured as described above, the rotational direction position of the first housing 1 with respect to the second housing 2 is at the center of the maximum movable range (this is referred to as the "neutral position of the rotary connector"). In the set state, it is attached to a steering device for a rotation characteristic test which is also adjusted to the neutral position. When the rotary connector is in the neutral position, as shown in FIG. 7, half of the flexible cable 14 is wound around the first housing 1 and the other half of the flexible cable 14 is And the outer end side thereof is introduced into a cable introduction portion 23 formed in the second housing 2. At this time, as apparent from FIG. 7, the outer end side of the flexible cable 14 is introduced into the cable introduction portion 23 at a smooth angle, and no tension acts on the flexible cable 14.

If the rotary connector is not in the neutral position when assembled into the steering device, and the first housing 1 has more than half of the flexible cable 14 wound therearound, before turning the steering wheel to the right end, as shown in FIG. As shown in FIG. 8, the flexible cable 14 is wound up to the winding end. In this state, as is apparent from FIG. 8, the outer end side of the flexible cable 14 is wound around the distal end of the cable introduction portion 23 formed in the second housing 2 at an acute angle,
A tension acts on the flexible cable 14. Conversely, if the rotary connector is not in the neutral position when assembled into the steering device, and if less than half the flexible cable 14 is wound around the first housing 1, before turning the steering wheel to the left end, As shown in FIG. 9, the flexible cable 14 is wound up to the rewind end. In this state, as shown in FIG. 9, the inner end side of the flexible cable 14 is wound around the distal end of the cable introduction portion 23 formed in the first housing 1 at an acute angle. A tension acts on the cable 14.

As shown in FIG.
Of the flexible cable 14 is inclined with respect to the width direction of the flexible cable 14, and the flexible cable 14 contacts only the upper end of the flexible cable 14. Therefore, the tension T acting on the flexible cable 14 is lower than the uppermost side. Concentrated on the conductor 16, the uppermost conductor 16
Is cut first, and then the lower conductors 16 are cut. Therefore, compared with the case where tension is uniformly applied to the plurality of conductors 16, the conductors 16 are easily cut, and it is possible to prevent the shipment of the rotating connector in which the setting of the neutral position is inappropriate.

Next, a second embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. FIG. 11 is a sectional view showing a connection state between a lead block and a flexible cable,
FIG. 12 is an inner view showing the shape of the distal end of the cable introduction portion formed in the second housing.

In the rotary connector of the present embodiment, as shown in FIG. 11, a flexible cable 14 is folded back by 180 degrees, and a conductor 15 exposed at the end thereof is provided with a joint bar provided on a lead block 12. 19 is connected. On the other hand, as shown in FIG. 12, the distal end of the cable introduction portion 23 is formed substantially vertically, unlike the first embodiment. The other parts are the same as those of the rotary connector according to the first embodiment, and the description thereof will be omitted to avoid duplication.

The rotating connector of this embodiment is a flexible cable 1
4 is turned 180 degrees and the conductor 16 is connected to the lead block 12.
11A, when a tension T acts on the flexible cable 14 as shown in FIG. 11A, the conductor 15 is connected to the joint between the conductor 15 and the joint bar 19.
From the joint bar 19 acts. Therefore, as shown in FIG. 11 (b), the distal end of the flexible cable 14 is connected to the joint bar 19 in a state where it is straightened without being folded, and the connecting portion between the conductor 15 and the joint bar 19 is applied only by the tension T. Since the connecting portion can be easily cut as compared with the case where the cable is cut, the connecting portion can be reliably cut even if the distal end of the cable introduction portion 23 is formed vertically. Therefore, similarly to the case of the first embodiment, it is possible to prevent the shipment of the rotary connector in which the setting of the neutral position is inappropriate.

In the first embodiment, the distal end portion of the cable introduction portion 23 is inclined, and in the second embodiment, the flexible cable 14 is folded back by 180 degrees. In the first and second housings 1 and 2 having the cable introduction portion 23 in which the portion is inclined,
Of course, it is also possible to mount the flexible cable 14 connected to the joint bar 19 by turning it 180 degrees. This makes it easier and more reliable to cut the conductor 15, so that the reliability of the rotation characteristic test performed before shipping the rotary connector can be further improved.

In each of the above embodiments, the rotary connector in which the lead blocks 7 and 12 are connected to both ends of the flexible cable 14 has been described as an example. It can also be applied to a rotary connector to which only a lead block is connected.

[0040]

According to the first aspect of the present invention, since the distal end of the cable introduction portion is inclined with respect to the width direction of the flexible cable, the tension acting on the flexible cable is concentrated on some conductors. Since the conductors can be cut more easily than in a case where tension is applied uniformly to a plurality of conductors, it is possible to prevent the shipment of a rotating connector in which the setting of the neutral position is inappropriate.

According to the second aspect of the present invention, since the flexible cable is folded back by 180 degrees and the conductor is connected to the joint bar of the lead block, when tension is applied to the flexible cable, the conductor and the joint bar are connected. A moment in the direction in which the conductor is peeled off from the joint bar can be applied to the connecting portion, and the connecting portion can be easily cut, thereby preventing the shipment of a rotating connector in which the setting of the neutral position is inappropriate. be able to.

According to the third aspect of the present invention, since the flexible cable connected to the joint bar by being turned back by 180 degrees is mounted on the housing having the cable introduction portion having the inclined tip, the conductor can be cut more easily. Easy and reliable,
The reliability of the rotation characteristic test performed before the shipment of the rotary connector can be further improved, and the reliability of the shipped product can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view of a rotary connector according to a first embodiment.

FIG. 2 is a bottom view of the rotary connector according to the first embodiment.

FIG. 3 is a sectional view taken along the line AA of FIG. 1;

FIG. 4 is a perspective view showing a configuration of a flexible cable and a lead wire connected via a lead block, and a lead block storage section and a cable introduction section formed in a second housing.

FIG. 5 is an inner view showing a shape of a distal end portion of a cable introduction portion formed in a second housing.

FIG. 6 is an exploded view showing a method of connecting a flexible cable and a lead wire via a lead block.

FIG. 7 is a plan view of a principal part of the rotary connector showing a state in which a flexible cable is wound at a neutral position.

FIG. 8 is a plan view of a main part of the rotary connector, showing a winding state of a flexible cable wound up to a winding end.

FIG. 9 is a plan view of a main part of the rotary connector, showing a winding state of a flexible cable wound up to a rewind end.

FIG. 10 is an essential part inner view of the fixed housing showing the effect of the rotary connector according to the first embodiment.

FIG. 11 is a cross-sectional view showing a connection state between a lead block of a rotary connector and a flexible cable according to a second embodiment.

FIG. 12 is an inner view showing a distal end shape of a cable introduction portion of the rotary connector according to the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st housing 2 2nd housing 3 Center hole 4 Top plate 5 Inner cylinder 6 Cover 7 Lead block 8 Lead wire 9 Guide hole 10 Bottom plate 11 Outer cylinder 12 Lead block 13 Lead wire 14 Flexible cable 15 Insulation Film 16 Conductor 17 Connecting part 18 Resin body 19 Joint bar 20, 21 Window hole 22 Connector storage part 23 Cable introduction part 30 Moving body 31 Rotating plate 32 Roller

Claims (3)

[Claims] 1. A pair of housings arranged concentrically and connected to each other so as to be relatively rotatable, and flexible housed in a space formed between the pair of housings so as to be fastened or unwound. And a lead block connected to the end of the flexible cable, and the housing includes a lead block storage section for detachably holding the lead block and a cable introduction section communicating with the lead block storage section. A rotary connector, wherein a part of the housing constituting a distal end portion of the cable introduction portion is inclined with respect to a width direction of the flexible cable. 2. A pair of housings arranged concentrically and connected to each other so as to be relatively rotatable, and flexible housed in a space formed between the pair of housings so as to be fastened or unwound. A flexible cable, a lead block connected to an end of the flexible cable, and a lead block storage section and a cable introduction section formed in the housing, and the flexible cable introduced from the cable introduction section. Wrapping the conductive cable in the lead block storage section,
A rotary connector connected to the lead block. 3. The rotary connector according to claim 1, wherein the flexible cable introduced from the cable introduction section is turned back in the lead block storage section and connected to the cable connector. .