JP6944403B2 - Rotating connector - Google Patents

Description

The present invention relates to a rotary connector.

In the steering column of an automobile, it is necessary to supply power to operate the airbag between the stator (fixed part) and the rotor (rotating part), and to transmit the switching signal from the horn switch and various control switches. Therefore, a rotating connector is used.

The stator and rotor are rotatably arranged coaxially, and the flat cable is stored and wound in the storage space defined between the outer cylinders that make up these stators and the inner cylinders that make up the rotor. It is used as an electrical connection means for airbags, inflators, and the like mounted on steering wheels that have a finite number of revolutions, such as automobile steering devices.

Patent Document 1 discloses a rotary connector using a plurality of flat cables and lead blocks for connecting the external connection terminal on the rotor side and the external connection terminal on the stator side.

Japanese Unexamined Patent Publication No. 2013-219007 International Publication No. 2017/208521

However, the problems of flat cables are (1) PET (polyethylene terephthalate) is used for the insulating film and the heat resistance is low, and (2) the number of flat cables increases as the number of signal lines increases due to the difficulty of fine pitch. There is.

Further, conventionally, an external connection terminal is connected to a flat cable connection terminal by spot welding. Therefore, in order to manufacture the rotary connector, a large-scale spot welding device is required, and since the flat cable is set to the spot welding device, there is a problem that the assembly efficiency is poor.

An object of the present invention is to provide a rotary connector capable of stabilizing the connection between a connection cable and an external connection terminal and having good assembly efficiency.

One aspect of the rotary connector is a stator, a rotor rotatably supported relative to the stator, housed in an annular space between the stator and the rotor, one end connected to the stator, and the like. A flexible printed circuit board whose ends are connected to the rotor and a plurality of external connection terminals connected to the connection land of the flexible printed circuit board via a conductive bonding material are integrally held, and at least of the rotor and the stator. The holding member includes a lead block fixed to one side and a holding member having a holding surface for holding a region including the connection land of the flexible printed circuit board between the bottom surface of the lead block. The holding surface is provided with a plurality of protrusions having a support surface that penetrates a through hole provided in the flexible printed circuit board and is in contact with the bottom surface of the lead block.

According to the present disclosure, the connection between the flexible printed circuit board, which is a connection cable, and the external connection terminal can be stabilized, and the assembly efficiency can be improved. Further, it is possible to avoid compression of the flexible printed circuit board by the lead block.

It is an external perspective view which shows the rotary connector which concerns on embodiment of this disclosure. It is a perspective view which shows the rotor side terminal part of a rotary connector. It is an exploded perspective view which shows the terminal component on a rotor side. It is an exploded perspective view which shows the holding member of a terminal part on a rotor side. It is a perspective view which shows the connector holding part of a holding member. It is a perspective view which shows the sub FPC of a terminal component on a rotor side. It is a perspective view which shows the back side of the 1st lead block of a rotor side terminal component. It is a perspective view which shows the back side of the 2nd lead block of the rotor side terminal component. It is sectional drawing (the 1) which shows the method of attaching a sub FPC, a 1st lead block and a 2nd lead block to a connector holding part. FIG. 2 is a cross-sectional view (No. 2) showing a method of attaching the sub-FPC, the first lead block, and the second lead block to the connector holding portion. It is a perspective view which shows the back side of the connector part of a rotor. It is sectional drawing (the 1) which shows the change of a leaf spring. It is sectional drawing (the 2) which shows the change of a leaf spring. It is sectional drawing which shows the relationship between the groove of the connector holding part, and the locking piece of a rotor. It is sectional drawing which shows the preferable structure of the locking piece of a connector holding part.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. FIG. 1 is an external perspective view showing a rotary connector according to an embodiment of the present disclosure.

FIG. 1 shows the rotation axis I of the rotation connector 1 according to the embodiment of the present disclosure, and also shows the Z axis parallel to the rotation axis I. In the following, for the sake of explanation, the Z1 side in the Z direction is referred to as the "upper side", the Z2 side in the Z direction is referred to as the "lower side", and the axial direction, the radial direction, and the circumferential direction are based on the rotation axis I. Specifically, the axial direction refers to the direction of the rotation axis I. The radial inside refers to the side closer to the rotation axis I, and the radial outside refers to the side far from the rotation axis I. Further, the circumferential direction refers to the circumferential direction around the rotation axis I. Further, the flexible printed circuit board will be simply referred to as FPC (Flexible Printed Circuits) below.

The rotary connector 1 is a connecting device for transmitting an electric signal between a vehicle steering column (not shown) and an electronic component (not shown) that rotates integrally with the steering shaft (not shown). ..

As shown in FIG. 1, the rotary connector 1 includes a rotor 200 and a stator 300.

In the rotor 200, a steering shaft included in the steering column is inserted in the axial direction. The rotor 200 is an annular member that defines an inner peripheral wall 201 inward in the radial direction. The rotor 200 is made of, for example, a resin material. The steering shaft is axially inserted into the space inside the radial direction defined by the inner peripheral wall 201 of the rotor 200. The rotor 200 is rotatably supported relative to the stator 300. The rotor 200 includes a connector portion 202, and a rotor-side terminal component described later is attached to the connector portion 202.

The stator 300 is fixed to the vehicle. The stator 300 is attached to the steering column. The rotor 200 is rotatably assembled to the stator 300. The stator 300 is an annular member that defines the outer peripheral wall 301 on the outer side in the radial direction.

FIG. 2 is a perspective view showing a rotor-side terminal component of the rotary connector 1.

As shown in FIG. 2, the rotary connector 1 includes a main FPC 400, a sub FPC 500, a holding member 600, a first lead block 700, and a second lead block 800. Among these, the sub FPC 500, the holding member 600, the first lead block 700, and the second lead block 800 are included in the rotor side terminal component 100.

The main FPC 400 is an example of a cable that electrically connects the stator 300 and the rotor 200. One end of the main FPC 400 is electrically connected to the rotor 200 and the other end is electrically connected to the stator 300. The main FPC400 has a substantially rectangular and flat form, and is formed of a plurality of conductive patterns such as copper foil formed in the longitudinal direction by etching and an insulating film such as polyimide that sandwiches and covers these from both sides. NS. The "substantially rectangular" is a form realized by extending linearly in the long direction with a constant width d, but is a concept including a mode in which the width d slightly changes at the end of the main FPC 400 or the like. Is.

The main FPC 400 is provided in an annular space (not shown) in the main body of the rotary connector 1. Specifically, an annular space portion extending in the circumferential direction is formed between the inner peripheral wall 201 and the outer peripheral wall 301 in the radial direction, and the main FPC 400 is housed in the annular space portion. The main FPC 400 may be spirally wound and stored, for example, in a superposed manner.

FIG. 3 is an exploded perspective view showing the rotor side terminal component 100. As described above, the rotor side terminal component 100 includes a sub FPC 500, a holding member 600, a first lead block 700, and a second lead block 800. FIG. 4 is an exploded perspective view showing the holding member 600. FIG. 5 is a perspective view showing a connector holding portion of the holding member 600. FIG. 6 is a perspective view showing the sub FPC500. FIG. 7 is a perspective view showing the back side of the first lead block 700. FIG. 8 is a perspective view showing the back side of the second lead block 800.

The sub FPC 500 includes a first wiring unit 510 connected to the main FPC 400, a second wiring unit 520 to which the first lead block 700 and the second lead block 800 are attached, and the first wiring unit 510 and the second wiring unit 520. Includes a third wiring unit 530 to be connected. Details of the second wiring unit 520 will be described later.

The holding member 600 includes an FPC holding portion 610 and a connector holding portion 620.

As shown in FIG. 4, a plurality of positioning caulking pins 612 for positioning one end 401 of the main FPC 400 and the first wiring 510 of the sub FPC 500 are projected from the surface 611 of the FPC holding portion 610. There is. The caulking pin 612 is integrally provided on the FPC holding portion 610 with, for example, the same resin as the resin forming the FPC holding portion 610. The first wiring portion 510 is formed with a pin insertion hole 511 to be inserted into the caulking pin 612. Further, the end portion 401 is formed with a pin insertion hole to be inserted into the caulking pin 612. By passing the caulking pin 612 through the pin insertion hole 511, passing the caulking pin 612 through the pin insertion hole of the end 401, and caulking the caulking pin 612, the end 401 and the first wiring portion 510 become the FPC holding portion 610. It is fixed. As a result, the main FPC 400 and the sub FPC 500 can be accurately positioned and fixed to the FPC holding portion 610. The wiring of the main FPC 400 is exposed on the surface of the end portion 401 on the sub FPC 500 side, the wiring of the sub FPC 500 is exposed on the surface of the first wiring portion 510 on the side of the main FPC 400, and conductive bonding such as solder is performed between them. Add the material. By softening and solidifying the conductive bonding material by heating and cooling, electrical continuity between the main FPC 400 and the sub FPC 500 can be ensured.

As shown in FIG. 5, the connector holding portion 620 has a holding surface 621 on the surface thereof, and a plurality of hook-shaped locking pieces for fixing the first lead block 700 and the second lead block 800 on the holding surface 621. 622 is formed. The locking piece 622 is provided so as to stand up upward, and is elastically deformable in the lateral direction. The holding surface 621 is formed with a plurality of protrusions 623 that abut on the bottom surface 700b of the first lead block 700 or the bottom surface 800b of the second lead block 800. In the present embodiment, two protrusions 623 are arranged in the vicinity of each locking piece 622. The height of the protrusion 623 is larger than the thickness of the second wiring portion 520. The connector holding portion 620 includes a plurality of leaf springs 624 (an example of an elastic member) that are elastically deformed by being pressed by the rotor 200 when the rotor side terminal component 100 is attached to the rotor 200. The holding surface 621 is also formed with a protrusion 625 having a height that allows the leaf spring 624 to come into contact with the rotor 200 in a state of being elastically deformed. The connector holding portion 620 is further formed with a receiving groove 629 for locking the hook-shaped locking piece 209 (see FIG. 10) provided in the rotor 200 in a state where the leaf spring 624 is elastically deformed. The receiving groove 629 has an engaging surface 629a facing opposite to the holding surface 621.

A protrusion 703 (see FIG. 7) provided on the bottom surface 700b of the first lead block 700 or a protrusion 803 (see FIG. 8) provided on the bottom surface 800b of the second lead block 800 is inserted into the holding surface 621. A protrusion insertion hole 627 is formed. By inserting the protrusion 703 and the protrusion 803 into the protrusion insertion hole 627, the alignment of the first lead block 700 and the second lead block 800 is facilitated, and the stability is improved.

Further, the connector holding portion 620 is formed with a receiving groove 626 and a locking piece 628 for connecting to the FPC holding portion 610. On the other hand, the FPC holding portion 610 is provided with an arm portion 614 having a protrusion 613 inserted into the receiving groove 626, and an opening 615 into which the locking piece 628 is inserted is formed. By inserting the protrusion 613 into the receiving groove 626 and inserting the locking piece 628 into the opening 615, the FPC holding portion 610 and the connector holding portion 620 can be snapped in.

As shown in FIG. 6, the second wiring portion 520 of the sub FPC 500 is provided with an area including a plurality of connection lands 525. The second wiring portion 520 includes a locking piece through hole 522 through which the locking piece 622 penetrates from below, a protrusion through hole 523 (an example of a through hole) through which the protrusion 623 penetrates from below, and a protrusion 703 or a protrusion 803. A protrusion through hole 521 penetrating from above is formed. Further, a through hole 529 (an example of the second through hole) through which the protrusion 625 penetrates from below is formed. By passing the locking piece 622 through the locking piece through hole 522 and the protrusion 623 through the protrusion through hole 523, the second wiring portion 520 is aligned with the connector holding portion 620 as shown in FIG. Can be done. In addition, in FIG. 3 and the like, the connection land 525 is omitted. In the present embodiment, the through holes are those that are separated from the outer shape of the FPC (the peripheral edge of the hole is closed) and those that are connected to the outer shape of the FPC (the peripheral edge of the hole is open). Includes both.

The first read block 700 integrally holds a plurality of external connection terminals 701. As shown in FIG. 7, the external connection terminal 701 reaches the bottom surface 700b of the first lead block 700 and is connected to the connection land 525 of the second wiring portion 520 on the connector holding portion 620. Further, as described above, the bottom surface 700b of the first lead block 700 is formed with a protrusion 703 to be inserted into the protrusion insertion hole 627. Further, a receiving groove 702 in which the locking piece 622 is locked is formed on the side surface of the first lead block 700.

The second lead block 800 integrally holds a plurality of external connection terminals 801. As shown in FIG. 8, the external connection terminal 801 reaches the bottom surface 800b of the second lead block 800 and is connected to the connection land 525 of the second wiring portion 520 on the connector holding portion 620. Further, as described above, the bottom surface 800b of the second lead block 800 is formed with a protrusion 803 to be inserted into the protrusion insertion hole 627. Further, a receiving groove 802 in which the locking piece 622 is locked is formed on the side surface of the second lead block 800.

Here, a method of attaching the sub FPC 500, the first lead block 700, and the second lead block 800 to the connector holding portion 620 will be described. 9A-9B are cross-sectional views showing a method of attaching the sub FPC500, the first lead block 700, and the second lead block 800 to the connector holding portion 620.

First, the sub FPC500 is mounted on the connector holding portion 620. That is, the second wiring portion 520 is placed on the connector holding portion 620 while being aligned so that the locking piece 622 penetrates the inside of the locking piece through hole 522 and the protrusion 623 penetrates the inside of the protrusion through hole 523. do. Since the height of the protrusion 623 is larger than the thickness of the second wiring portion 520, the top portion 623a of the protrusion 623 is located above the surface 520a of the second wiring portion 520, as shown in FIG. 9A.

Next, the first lead block 700 is inserted while aligning the protrusion 703 so as to penetrate the protrusion through hole 521 of the second wiring portion 520 and be inserted into the protrusion insertion hole 627 of the connector holding portion 620. Press against the connector holding portion 620. At this time, as shown in FIG. 9B, when the bottom surface 700b of the first lead block 700 comes into contact with the top portion 623a of the protrusion 623, the pressing of the first lead block 700 is stopped. By performing such pressing, as shown in FIG. 2, the locking piece 622 is locked in the receiving groove 702, and the first lead block 700 is placed in the connector holding portion 620 with the second wiring portion 520 in between. Snap-in join. Further, by adjusting the protruding height of the external connection terminal 701 on the bottom surface 700b side in advance and providing a conductive bonding material such as solder between the external connection terminal 701 and the connection land 525, the conductive bonding material is provided. The external connection terminal 701 can be brought into contact with the connection land 525 via the above.

Similarly, the second lead block 800 is also aligned so that the protrusion 803 penetrates the protrusion through hole 521 of the second wiring portion 520 and is inserted into the protrusion insertion hole 627 of the connector holding portion 620. While pressing the second lead block 800 against the connector holding portion 620. At this time, when the bottom surface 800b of the second lead block 800 comes into contact with the top portion 623a of the protrusion 623, the pressing of the second lead block 800 is stopped. By performing such pressing, as shown in FIG. 2, the locking piece 622 is locked in the receiving groove 802, and the second lead block 800 is placed in the connector holding portion 620 with the second wiring portion 520 in between. Snap-in join. Further, by adjusting the protruding height of the external connection terminal 801 on the bottom surface 800b side in advance and providing a conductive bonding material such as solder between the external connection terminal 801 and the connection land 525, the conductive bonding material is provided. The external connection terminal 801 can be brought into contact with the connection land 525 via the above.

Then, by heating and cooling, the conductive bonding material between the external connection terminal 701 and the connection land 525 and the conductive bonding material between the external connection terminal 801 and the connection land 525 are softened and solidified to soften and solidify them. They can be mechanically and electrically connected to each other.

As described above, the FPC holding portion 610 and the connector holding portion 620 are inserted into the receiving groove 626 of the protrusion 613, and the locking piece 628 is inserted into the opening 615, whereby the FPC holding portion 610 and the connector holding portion 620 are inserted. Can be snap-in combined with.

As described above, the caulking pin 612 can be used to accurately position and fix the first wiring portion 510 and the main FPC 400 of the sub FPC 500 on the FPC holding portion 610. The wiring of the end portion 401 of the main FPC 400 and the wiring of the first wiring portion 510 are opposed to each other while applying a conductive bonding material such as solder between them, and the conductive bonding material is softened and solidified by heating and cooling. As a result, these wirings can be mechanically and electrically connected to each other.

In this way, the rotor side terminal component 100 including the sub FPC 500, the holding member 600, the first lead block 700, and the second lead block 800 can be integrated with the main FPC 400.

The heating and cooling for softening and solidifying the conductive bonding material on the connector holding portion 620 may be performed at the same time as heating and cooling for softening and solidifying the conductive bonding material on the FPC holding portion 610. ..

The rotor side terminal component 100 is attached to the connector portion 202 of the rotor 200. FIG. 10 is a perspective view showing the back side of the connector portion 202.

As shown in FIG. 10, the connector portion 202 has a protrusion 204 that is pressed against a leaf spring 624 provided on the connector holding portion 620, a protrusion 205 that abuts on the protrusion 625, and a hook shape that is locked to a receiving groove 629. Locking piece 209 is formed. The protrusions 204A, 204B, and 204C in FIG. 10 are pressed against the leaf springs 624A, 624B, and 624C in FIG. 5, respectively. The protrusions 205A, 205B and 205C in FIG. 10 abut on the protrusions 625A, 625B and 625C in FIG. 5, respectively. The locking pieces 209A and 209B in FIG. 10 are locked to the engaging surface 629A and the engaging surface 629B of the receiving groove 629 in FIG. 5, respectively.

11A to 11B are cross-sectional views showing changes in the leaf spring 624 when the rotor side terminal component 100 is attached to the connector portion 202. FIG. 12 is a cross-sectional view showing the relationship between the receiving groove 629 and the locking piece 209. When attaching the rotor side terminal component 100 to the connector portion 202, first, as shown in FIG. 11A, each leaf spring 624 is brought into contact with each protrusion 204. At this stage, there is a gap between the protrusion 625 and the protrusion 205, and the locking piece 209 is not locked in the receiving groove 629. Next, the rotor side terminal component 100 is pushed into the connector portion 202. As a result, as shown in FIG. 11B, stress acts on the leaf spring 624, and the leaf spring 624 elastically deforms. When the rotor side terminal component 100 is further pushed in, the locking piece 209 enters the receiving groove 629. At this time, a force F acts from the leaf spring 624 in the direction in which the elastic deformation of the leaf spring 624 returns to the initial state on the entire rotor 200 including the protrusion 204. Therefore, as shown in FIG. 12, the force F also acts on the locking piece 209. On the other hand, the receiving groove 629 of the connector holding portion 620 has an engaging surface 629a facing the opposite side to the holding surface 621. Therefore, the elastically deformed leaf spring 624 urges the rotor 200 and the connector holding portion 620 with a force F in the direction in which the rotor 200 and the connector holding portion 620 are separated from each other in the connection between the connector holding portion 620 and the connector portion 202, so that the locking piece 209 is forced. It is urged by F in a direction approaching the engaging surface 629a, and is locked in the receiving groove 629 without play. In this way, the rotor side terminal component 100 and the connector portion 202 are snap-in coupled. If the rotor side terminal component 100 is excessively pushed into the connector portion 202, the leaf spring 624 may be plastically deformed beyond the elastic region and may be damaged. Abuts on the protrusion 205. Therefore, damage to the leaf spring 624 can be prevented. Further, among the protrusions 625, the protrusion 625C (an example of the second protrusion) penetrates the through hole 529 (an example of the second through hole) provided in the sub FPC500 (see FIGS. 3 and 6). Since it comes into contact with the 205C, the sub FPC 500 is not loaded and damage can be prevented.

In the rotary connector 1 configured in this way, the external connection terminals 701 and 801 and the connection land 525 of the sub FPC 500 can be electrically and mechanically connected by using a conductive bonding material such as solder. Therefore, the rotary connector 1 can be easily assembled with high accuracy.

Further, the bottom surface 700b of the first lead block 700 is in contact with the surface of the top portion 623a of the protrusion 623 (an example of the support surface), and there is a gap between the first lead block 700 and the second wiring portion 520. Similarly, the bottom surface 800b of the second lead block 800 is in contact with the top portion 623a of the protrusion 623, and there is a gap between the second lead block 800 and the second wiring portion 520. Therefore, when the first lead block 700 and the second lead block 800 are attached to the connector holding portion 620, the second wiring portion 520 is compressed between the first lead block 700 or the second lead block 800 and the connector holding portion 620. It is possible to avoid such a situation. When the second wiring portion 520 is compressed, there is a risk of damage such as disconnection of the wiring inside the second wiring portion 520, but such a risk can be avoided in advance.

When attaching the connector to the connector portion 202, a force is applied to the first lead block 700 and the second lead block 800 from above, but this is because the first lead block 700 and the second lead block 800 are supported by the protrusion 623. In this case, the compression of the second wiring portion 520 can be avoided.

Further, in the present embodiment, the locking piece 622 is locked in the receiving groove 702, the first lead block 700 is snap-in coupled to the connector holding portion 620, and the locking piece 622 is locked in the receiving groove 802. 2 The lead block 800 is snap-in coupled to the connector holding portion 620. Therefore, the first lead block 700 and the second lead block 800 are stably fixed to the connector holding portion 620. Therefore, even when vibration or impact is applied to the first lead block 700 or the second lead block 800, it is possible to prevent the conductive bonding material that connects the external connection terminal 701 or 801 and the connection land 525 from being damaged. ..

The shape of the locking piece 622 is not limited, but it is preferable that the locking piece 622 has the following configuration. FIG. 13 is a cross-sectional view showing a preferable configuration of the locking piece 622. As shown in FIG. 13, the locking piece 622 preferably has a protrusion 622b that enters the receiving groove 702 or 802, and has a tapered inclined surface 622a at the base of the protrusion 622b. The inclined surface 622a is a surface inclined with respect to the holding surface 621. When the locking piece 622 has the inclined surface 622a, the inclined surface 622a comes into contact with the lead block at the time of snap-in coupling and acts on the first lead block 700 or the second lead block 800 from the locking piece 622. The force will include a component F1 parallel to the holding surface 621 and a component F2 perpendicular to the holding surface 621. That is, with the connector holding portion 620 and the first lead block 700 or the second lead block 800 snapped in, the locking piece 622 causes the first lead block 700 or the second lead block 800 to be on the top of the protrusion 623. It is urged toward the surface of 623a. Therefore, even if there is some variation in the dimensions of the first lead block 700 or the second lead block 800, the first lead block 700 and the second lead block 800 can be stably fixed to the connector holding portion 620. can.

The conductive bonding material is not limited to solder, and for example, silver paste or the like can be used.

A stator side terminal component in which the main FPC 400 is integrated is attached to the stator 300. It is preferable that the stator-side terminal component has the same configuration as the rotor-side terminal component 100. That is, an appropriate protrusion is formed on the connector holding portion so that the sub FPC is not compressed between the lead block holding the external connection terminal and the connector holding portion, and a corresponding protrusion through hole is formed on the sub FPC. Is preferable. Further, if either the stator side terminal component or the rotor side terminal component has the same configuration as the rotor side terminal component 100 of the above embodiment, the terminal component prevents damage due to compression of the sub FPC. can do.

The preferred embodiment of the present invention has been described in detail above. However, the present invention is not limited to the embodiments described above. Various modifications and substitutions can be applied to the embodiments described above without departing from the scope of the present invention. In addition, each of the features described with reference to the above-described embodiments may be appropriately combined as long as there is no technical contradiction.

For example, in the above embodiment, the main FPC 400 and the sub FPC 500 are separately molded and connected. However, the main FPC 400 and the sub FPC 500 may be integrally formed.

1 Rotating connector 100 Rotor side terminal parts 200 Rotor 201 Inner peripheral wall 202 Connector part 209 Locking piece 300 Stator 301 Outer wall 400 Main FPC
500 sub FPC
510 1st wiring part 520 2nd wiring part 522 Locking piece through hole 523 Protrusion through hole 525 Connection land 259 Through hole 530 3rd wiring part 600 Holding member 610 FPC holding part 620 Connector holding part 621 Holding surface 622 Locking piece 623 Protrusion 623a Top 624 Leaf spring 629 Receiving groove 700 1st lead block 701 External connection terminal 702 Receiving groove 800 2nd lead block 801 External connection terminal 802 Receiving groove

Claims (5)

With the stator
A rotor rotatably supported relative to the stator,
A flexible printed circuit board housed in an annular space between the stator and the rotor, one end connected to the stator and the other end connected to the rotor.
A lead block that integrally holds a plurality of external connection terminals connected to the connection land of the flexible printed circuit board via a conductive bonding material and is fixed to at least one of the rotor and the stator.
A holding member having a holding surface for holding a region of the flexible printed circuit board including the connection land between the lead block and the bottom surface of the lead block.
Have,
The holding surface of the holding member is characterized in that a plurality of protrusions having a support surface that penetrates a through hole provided in the flexible printed circuit board and is in contact with the bottom surface of the lead block are provided. Rotating connector. The holding member has an elastically deformable locking piece.
The rotary connector according to claim 1, wherein the locking piece is locked to a receiving portion formed on the lead block, and the holding member and the lead block are snap-in coupled. The locking piece has an inclined surface that is inclined with respect to the holding surface of the holding member and is in contact with the lead block.
The rotation according to claim 2, wherein the lead block is urged toward the support surface by the locking piece in a state where the holding member and the lead block are snap-in coupled. connector. The rotor or the stator to which the lead block is fixed and the holding member are snap-in coupled.
The holding member has an elastic member that elastically deforms in a state where the rotor or the stator and the holding member are snapped in.
The rotary connector according to any one of claims 1 to 3, wherein the rotor or the stator and the holding member are urged by the elastic member in a direction away from each other. The rotation according to claim 4, wherein the holding member has a second protrusion that penetrates a second through hole provided in the flexible printed circuit board and abuts on the rotor or the stator. connector.

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