JP2013168331A - Wiring cable and rotation detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiring cable which reduces the number of components compared to a conventional wiring cable and simplifies its structure thereby facilitating processing, and to provide a rotation detection device.SOLUTION: A wiring cable 10A includes a conductive wire 11 (a signal transmission member) transmitting a signal; and a covering member covering a part of or an entire part of the conductive wire 11. The wiring cable 10A further includes a loose part 12 that is integrally formed by a resin with the conductive wire 11 loosened in a non linear manner. Even if an external force is applied to the wiring cable 10A, the loosened conductive wire 11 is deformed with the resin and stress is relaxed. Thus, unlike a conventional wiring cable, the wiring cable 10A does not need a rod, and the number of components is reduced. The loose part may be integrally formed by the resin with the conductive wire 11 loosened in a spiral shape. Therefore, the structure is simplified and processing is easily performed.

Description

  The present invention relates to a wiring cable including a signal transmission member and a covering member, and a rotation detection device having the wiring cable.

  Conventionally, an example of a technique related to a wiring cable intended to be used without being broken even under repeated bending and twisting conditions has been disclosed (see, for example, Patent Document 1). This wiring cable has a structure in which a conductor having a conductor covered with an insulator is spirally wound around a rod body having a material resistant to bending.

Japanese Patent Laid-Open No. 09-092041

  However, since the wiring cable described in Patent Document 1 requires a rod for winding and fixing a conducting wire, the number of parts increases by the amount of the rod. Further, when the conductive wires are densely wound around the rod body in a spiral shape, pressure between the conductive wires is generated by bending or twisting, and the stress may not be relieved. In order to perform winding that can withstand bending and twisting, it is necessary to loosen the conductors or to provide a space between the conductors. Therefore, the structure becomes complicated, and high-precision and difficult machining is required.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a wiring cable and a rotation detection device that can reduce the number of parts as compared with the related art and simplify the structure to facilitate processing. .

  The invention made in order to solve the above-mentioned problems is a wiring cable comprising a signal transmission member that transmits a signal and a covering member that covers a part or all of the signal transmission member. It is characterized by having a relaxation portion that is integrally molded with resin in a state of being loosened.

  According to this configuration, since the signal transmission member is slackened in a non-linear manner in the relaxed portion, the slackened signal transmission member is deformed together with the resin even when subjected to an external force (for example, pulling, bending, twisting, etc.) Is alleviated. Therefore, since a rod body as in the prior art is not required, the number of parts can be reduced. Since the signal transmission member may be integrally formed with resin in a state where the signal transmission member is slackened in a non-linear manner, the structure is simplified and processing can be performed easily. In addition, since the relaxed portion is integrally deformed when an external force is applied, it is possible to prevent (including suppression; the same applies hereinafter) from generating a breaking stress in the signal transmission member.

  The “signal” is arbitrary and includes a rotation detection signal described later. The “signal transmission member” is arbitrary as long as it is a member capable of transmitting a signal (including data). For example, a wire, an electric wire (including a conductive wire, a shield wire, and the like; the same applies hereinafter), an optical cable, and the like are applicable. The “covering member” is arbitrary as long as it is a member that can cover part or all of the signal transmission member. In relation to the signal transmission member, an insulating member or a conductive member may be used. The “resin” may be a resin of any material that can be integrally molded (including the meaning of the material; the same applies hereinafter). It does not matter whether the material of the covering member is the same. The relationship between the covering member and the resin is arbitrary, and the covering member and the resin may be configured integrally, or the covering member and the resin may be configured separately.

  A rotation detection unit that detects a rotation state of the rotating body and outputs a rotation detection signal; a signal transmission unit that transmits the rotation detection signal to an external device; a part of the signal transmission unit and the rotation detection unit; In the rotation detection device including the main body portion to be held, the signal transmission portion includes the wiring cable according to any one of claims 1 to 3 in part or in whole. According to this configuration, it is possible to provide a rotation detection device that can reduce the number of parts as compared with the conventional one, simplify the structure, and easily perform the processing.

  The “rotary body” may be of any shape. Usually, a disc shape (disc shape) or an annular shape (donut shape) is applicable. The “rotation state” is a state relating to rotation, such as a rotation speed and a rotation angle, and includes a stop (rest). The “rotation detection unit” includes a sensor element and a signal processing component. The sensor element and the signal processing component may be integrally formed as long as signals can be transmitted, or may be formed separately. The sensor element is arbitrary as long as it is an element that detects the rotation of the rotating body. Usually, a magnetic sensor, a sound wave sensor, etc. correspond. Based on the signal detected by the sensor element, the signal processing component has a function of performing a process of outputting it as a rotation detection signal in a required signal format (for example, a digital signal including a pulse signal, an analog signal, etc.). The “external device” is arbitrary as long as it is a processing device capable of processing the rotation detection signal, and corresponds to, for example, an ECU or a computer.

It is a schematic diagram which shows the 1st structural example of a wiring cable. It is a schematic diagram which shows the example of formation of the loosened conductive wire. It is a schematic diagram which shows a state when a wiring cable is pulled. It is a schematic diagram which shows a state when a wiring cable is bent. It is a schematic diagram which shows the structural example of the rotation detection apparatus which has a wiring cable. It is a schematic diagram which shows the 2nd structural example of a wiring cable. It is a schematic diagram which shows the example which relaxes a conductive wire using a to-be-relaxed body. It is a schematic diagram which shows the 3rd structural example of a wiring cable. It is a schematic diagram which shows the example which relaxes a conductive wire using a to-be-relaxed body.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. Note that unless otherwise specified, “connecting” means electrically connecting. Each figure shows elements necessary for explaining the present invention, and does not necessarily show all actual elements. When referring to directions such as up, down, left and right, the description in the drawings is used as a reference. The conductive wire is also called “core wire (core wire)” or “lead wire”.

[Embodiment 1]
The first embodiment is an example in which a conductive wire is applied as a signal transmission member, and will be described with reference to FIGS. A wiring cable 10A illustrated in FIG. 1 includes a conductive wire 11, a loosening portion 12, and the like. The conductive wire 11 may be of any material (including the meaning of the material; the same applies hereinafter) as long as it is a member that can electrically transmit a signal.

  The relaxing portion 12 corresponds to a “coating member”, and is integrally formed of resin in a state where a part of the conductive wire 11 is loosened in a spiral shape (including a spiral, the same applies hereinafter). Specifically, first, as shown in FIG. 2, a part of the conductive wire 11 is formed in a spiral shape in advance. A part of the conductive wire 11 formed in a spiral shape is disposed at a predetermined position in the molding die 20, and the molten resin is injected into the molding die 20 through the runner portion 21 to be integrally molded (solidified) into a predetermined shape. .

  Any resin may be used as long as the resin can be integrally molded by a molding machine. In this embodiment, since the conductive wire 11 itself is integrally formed, an insulating resin is used. Examples of the molding machine include an injection molding machine (molding) and a compression molding machine. One or both of the molding die 20 and the runner portion 21 may be a part of the molding machine or a member provided separately from the molding machine. An arbitrary shape can be applied as the predetermined shape. For example, in FIG. 1 and FIG. 2, the predetermined shape is formed into a columnar shape (including an elliptical column shape, the same applies hereinafter).

  The relaxed portion 12 integrally molded as described above is deformed as shown in FIGS. 3 and 4 when receiving an external force. FIG. 3 shows a tension generation state in which the relaxing portion 12 is extended in the longitudinal direction of the conductive wire 11 (for example, the directions of arrows D1 and D2 shown in FIG. 1). 3 is deformed by being stretched and deformed against the elastic force of the resin that constitutes the relaxed portion 12, and the helical portion of the conductive wire 11 is also extended along with the deformation of the resin. To do.

  Further, FIG. 4 shows a bending moment generation state in which the relaxing portion 12 is bent in a non-longitudinal direction (a direction intersecting the longitudinal direction; for example, the arrow D3 direction shown in FIG. 1). 4 is bent and deformed by the elastic force of the resin constituting the relaxing portion 12, and the helical portion of the conductive wire 11 is also deformed as the resin is deformed. When the relaxing portion 12 receives an external force in this way, the entire relaxing portion 12 is deformed corresponding to the external force.

  Although not shown, even when receiving an external force that twists the loosening portion 12, the loosening portion 12 is deformed as a whole as in FIGS. On the other hand, when no external force is applied, the original state (that is, the state shown in FIG. 1) is restored by the elastic force (restoring force) of the resin of the relaxing portion 12.

  FIG. 5 shows a configuration example of the rotation detection device 50 using the wiring cable 10A configured as described above (or the wiring cable 10C shown in FIG. 8 described later) as the signal transmission unit 10. In the configuration example of FIG. 5, two conductive wires 11 are provided to connect the two lead wires provided in the rotation detection unit 54 and the external device 60, respectively.

  The rotation detection device 50 has a function of detecting the rotation state of the rotating body 70 and transmitting the rotation detection signal to the external device 60 through the signal transmission unit 10 as a rotation detection signal. The rotating body 70 is arbitrary as long as it is a rotatable object. For example, hub bearings, wheels (including wheels), rotating electric machines (generators, motors, motor generators, etc.) are applicable. Any device can be applied as the external device 60 as long as the rotation detection signal can be processed. For example, an ECU or a computer is applicable. The processing of the rotation detection signal corresponds to processing for obtaining information related to the rotation of the rotating body 70, such as the rotation speed and the rotation angle of the rotating body 70, for example.

  The rotation detection device 50 shown in the configuration example of FIG. 5 includes an attachment portion 51, a main body portion 53, a rotation detection portion 54, an O-ring 55, and the like in addition to the signal transmission portion 10 corresponding to a “signal transmission portion”. Note that some elements (for example, the attachment portion 51 and the O-ring 55) are not essential, and may be provided as necessary. Below, each element is demonstrated easily.

  The mounting portion 51 is also referred to as a “stay”, and is formed so as to cover both a part of the main body portion 53 and a part of the signal transmission portion 10 as illustrated. The mounting portion 51 includes a mounting portion main body 51a, a mounting bush 51b, and the like. The attachment portion main body 51a is formed in a direction intersecting with the longitudinal direction of the signal transmission portion 10 (orthogonal direction in FIG. 5). As the mounting bush 51b, a metal member is mainly used which is provided with a hole for fixing the rotation detecting device 50 itself to an attached body (for example, a frame or the like).

  The main body 53 is integrally formed by a molding machine. In the configuration example shown in FIG. 5, the mounting portion 51, a part of the signal transmission portion 10, the conductive wire 11, and the rotation detection portion 54 are integrally formed with resin. In this integral formation, the above-described relaxation portion 12 and the concave portion 52 for attaching the O-ring 55 are also formed. It does not matter whether the resin used for forming the main body 53 and the resin used for integral molding of the relaxing portion 12 are the same material. In any case, the relaxation portion 12 provided as a part of the main body portion 53 is integrally deformed as shown in FIGS. 3 and 4 when receiving an external force.

According to the first embodiment described above, the following effects can be obtained.
(1) The wiring cable 10 </ b> A is configured to have a relaxing portion 12 that is integrally molded with resin in a state where the conductive wire 11 is loosened in a spiral shape (non-linear shape) (see FIG. 1). According to this configuration, even when an external force is applied, the slackened conductive wire 11 is deformed together with the resin and the stress is relaxed. Therefore, since a rod body as in the prior art is not required, the number of parts can be reduced. Since the conductive wire 11 may be integrally formed with resin in a state in which the conductive wire 11 is loosened in a spiral shape, the structure is simplified and the processing can be easily performed. In addition, when the external force is applied, the relaxing portion 12 is integrally deformed, so that it is possible to prevent a breaking stress from being generated in the conductive wire 11.

  (2) The relaxing portion 12 of the signal transmission portion 10 (wiring cable 10A) is configured to relieve stress by deforming the conductive wire 11 and the resin integrally by receiving an external force (see FIGS. 3 and 4). . According to this configuration, even when an external force is applied, the slackened conductive wire 11 is deformed together with the resin and the stress is relieved. Therefore, the number of parts can be reduced, the structure is simplified, and processing can be performed easily.

  (3) The conductive wire 11 in the relaxing portion 12 is configured to be loosened in a spiral form (see FIG. 1). According to this configuration, since the conductive wire 11 and the resin are integrally deformed and relieve stress in a simple form, the structure is simplified and processing can be performed more easily.

  (4) The rotation detection device 50 is configured to include the above-described wiring cable 10A in a part of the signal transmission unit 10 (see FIG. 5). According to this configuration, the slack portion 12 (that is, the conductive wire 11 and the resin) included in the wiring cable 10A (signal transmission portion 10) is deformed integrally by receiving an external force. Therefore, it is possible to provide the rotation detection device 50 that exhibits the effects of the wiring cable 10A. It should be noted that the same effect can be obtained even if the signal transmission unit 10 has the above-described wiring cable 10A.

  (5) It was set as the structure which has the attaching part 51 which attaches the main-body part 53 (refer FIG. 5). According to this structure, the main-body part 53 (as a result, rotation detection apparatus 50) can be easily attached with respect to a to-be-attached body.

  (6) It was set as the structure integrally formed so that one or both may be covered among a part of main-body part 53 and a part of wiring cable 10A (refer FIG. 5). According to this structure, it can shape | mold easily in the target shape. Note that the same effects can be obtained by a configuration in which one of the main body 53 and a part of the wiring cable 10A is integrally formed so as to cover one of them.

[Embodiment 2]
The second embodiment will be described with reference to FIG. For simplicity of illustration and description, the second embodiment will be described with respect to differences from the first embodiment. Therefore, the same elements as those used in Embodiment 1 are denoted by the same reference numerals, and description thereof is omitted.

  A wiring cable 10B illustrated in FIG. 6 includes a conductive wire 13 and a loosening portion 12. Similar to the conductive wire 11, the conductive wire 13 may be made of any material as long as it is a member capable of electrically transmitting a signal. The conductive wire 13 is different from the conductive wire 11 in the form of loosening. That is, the conductive wire 11 is loosened in a spiral shape, whereas the conductive wire 13 is loosened in a wave shape.

  The rest is the same as in the first embodiment. The slack portion 12 after the integral molding is deformed integrally as shown in FIGS. 3 and 4 when receiving an external force. The signal transmission unit 10 of the rotation detection device 50 may have a configuration in which the wiring cable 10B is partly or wholly. In this case, the conductive line 11 shown in FIG. 5 becomes the conductive line 13 shown in FIG. 6 (in parentheses in FIG. 5).

  According to the second embodiment described above, the same operational effects as those of the first embodiment can be obtained. That is, only the difference in the form of loosening (spiral shape and wave shape) is required, and in (1) to (6), the conductive wire 11 may be read as the conductive wire 13 and the wiring cable 10A may be read as the wiring cable 10B.

[Embodiment 3]
The third embodiment will be described with reference to FIG. For simplicity of illustration and description, the third embodiment will be described with respect to differences from the first embodiment. Therefore, the same elements as those used in Embodiment 1 are denoted by the same reference numerals, and description thereof is omitted.

  The form shown in FIG. 7 replaces the form shown in FIG. In FIG. 2, a conductive wire 11 partially formed in a spiral shape is used in advance. On the other hand, in FIG. 7, the conductive wire 11 is wound around the loosened body 30 to form a spiral shape, which is then placed at a predetermined position in the mold 20 and molten resin is injected into the mold 20 through the runner portion 21. Then, it is integrally formed (solidified) into a predetermined shape.

  The shape, material, etc. of the to-be-relaxed body 30 are arbitrary. In the configuration example of FIG. 7, a cylindrically formed resin is used. Although not shown, a columnar resin may be used instead of the cylindrical shape. In any case, it is sufficient that the wound conductive wire 11 has a spiral shape. When the relaxed body 30 is formed of a resin (melting point M1), the material to be relaxed is lower than that of the resin (melting point M2) used for integrally forming the relaxing portion 12 (that is, M1 <M2). It is preferable to use a material having an elastic force equal to or greater than the resin used. At the time of integral molding of the relaxing portion 12, the resin of the relaxed body 30 is melted by the heat of the resin of the relaxing portion 12 and becomes turbid and integrated.

  The rest is the same as in the first embodiment. The slack portion 12 after the integral molding is deformed integrally as shown in FIGS. 3 and 4 when receiving an external force. Since the loosening mode is the same as that of the first embodiment, the signal transmission unit 10 of the rotation detecting device 50 can be configured to have a part or all of the wiring cable 10A (see FIG. 5). Therefore, the above-described third embodiment can obtain the same effects as those of the first embodiment.

[Other Embodiments]
Although the form for implementing this invention was demonstrated according to Embodiment 1-3 in the above, this invention is not limited to the said form at all. In other words, various forms can be implemented without departing from the scope of the present invention. For example, the following forms may be realized.

  In the above-described wiring cable 10A shown in the first and third embodiments and the wiring cable 10B shown in the second embodiment, all the loosened portions 12 are integrally formed of a single portion of the conductive wires 11 and 13 with resin. (See FIGS. 1, 5, and 6). Instead of this form, a plurality of loosened portions 11 and 13 may be integrally formed with resin. For example, the wiring cable 10C of the configuration example shown in FIG. 8 has a relaxing portion 12 integrally formed of resin in a state where the two conductive wires 11 are both loosened in a spiral shape (non-linear shape). Although not shown, the same applies to the case where the two conductive wires 13 (see FIG. 6) and the three or more conductive wires 11 and 13 are integrally formed with resin in a state where they are loosened in a non-linear manner. However, when the conductive wires 11 and 13 are not covered with an insulating member, they need to be arranged so as not to contact each other. The slack portion 12 after the integral molding is deformed integrally as shown in FIGS. 3 and 4 when receiving an external force. In any configuration, since the number of conductive wires 11 and 13 provided in the relaxing portion 12 is only different, the same effect as in the first to third embodiments can be obtained.

  In the first embodiment described above, a part of the conductive wire 11 is formed in a spiral shape (see FIG. 1), and in the second embodiment, a part of the conductive wire 13 is formed in a wave shape (see FIG. 6). Instead of (or in combination with) these forms, it may be formed in a non-linear shape other than a spiral or wave shape. The other non-linear shape corresponds to, for example, an S shape, a “<” shape, a curved shape (bow shape), a zigzag shape, or the like shown in FIG. 9. In FIG. 9, the conductive wire 14 is put inside the to-be-relaxed body 30 formed in a cylindrical shape, and is loosened so that the conductive wire 14 is in contact with the inner wall surface. However, it is not always necessary to make contact, and the conductive wire 14 may be loosened without making contact with the inner wall surface. If the to-be-relaxed body 30 is an insulating resin, the to-be-relaxed body 30 serves as a covering member, so that the outer diameter of the to-be-relaxed body 30 and the inner diameter of the mold 20 may be substantially matched. Whichever form is used, only the non-linear form is different, so the same effect as in the first and second embodiments can be obtained.

  In the first to third embodiments described above, the conductive wires 11, 13, and 14 that electrically transmit signals are applied as the signal transmission member (see FIGS. 1, 5, and 6). Instead of (or in combination with) this form, a signal transmission member (for example, an optical cable for transmitting an optical signal) that transmits another form of signal (for example, an optical signal) may be applied. Since any signal transmission member can be applied, a signal can be transmitted to the external device 60, so that the same effect as the first to third embodiments can be obtained.

  In the above-described third embodiment, the relaxed body 30 is formed in a cylindrical shape (or columnar shape) (see FIG. 7). It may replace with this form and you may form in shapes (for example, polygonal cylinder shape, polygonal column shape, etc.) other than cylindrical shape or column shape. Regardless of the shape, it is sufficient that the conductive wires 11, 13, and 14 can be wound, so that the same effects as those of the third embodiment can be obtained.

  In the first to third embodiments described above, the relaxed portion 12 has a single non-linear portion (that is, a spiral portion, a wavy portion, etc.) (see FIGS. 1, 5, and 6). Instead of this form, a configuration having a plurality of non-linear portions in the relaxing portion 12 may be adopted. Between the non-linear portions, a linear portion may be formed or a curved portion may be formed. Even if the conductive wires 11, 13, and 14 in the relaxing portion 12 are formed in any form, since the number of non-linear portions is only different, the same effect as in the first to third embodiments can be obtained. .

  In the first to third embodiments described above, the relaxing portion 12 is formed in a cylindrical shape (see FIGS. 1, 5, and 6). It replaces with this form and it is good also as a structure shape | molded in shapes other than column shape. For example, a cylindrical shape bent in an L shape shown in FIG. 4 without receiving external force, a cylindrical shape having a planar portion shown in FIG. 5, a polygonal columnar shape, a slanted columnar shape, etc. , Cones, and other geometric shapes. In short, the relaxing portion 12 may be integrally formed according to any desired shape. Whichever shape is used, only the difference in shape is obtained, so that the same effect as in the first to third embodiments can be obtained. Moreover, since it can form integrally with arbitrary target shapes, a design freedom improves.

10 Signal transmission part 10A, 10B, 10C Wiring cable (signal transmission part)
11, 13, 14 Conductive wire (signal transmission member)
12 Relaxing part (coating member)
50 Rotation detection device 60 External device 70 Rotating body

Claims (6)

In a wiring cable comprising a signal transmission member that transmits a signal and a covering member that covers a part or all of the signal transmission member,
A wiring cable comprising a loosening portion integrally formed of resin in a state where the signal transmission member is loosened in a non-linear manner.   The wiring cable according to claim 1, wherein the relaxation portion receives an external force and the signal transmission member and the resin are integrally deformed to relieve stress.   The wiring cable according to claim 1, wherein the signal transmission member in the relaxation portion is loosened in one or both of a spiral shape and a wave shape. A rotation detection unit that detects a rotation state of the rotating body and outputs a rotation detection signal, a signal transmission unit that transmits the rotation detection signal to an external device, a part of the signal transmission unit, and the rotation detection unit are held. In a rotation detection device comprising a main body part,
4. The rotation detection device according to claim 1, wherein the signal transmission unit includes a part or all of the wiring cable according to claim 1.   The rotation detection device according to claim 4, further comprising an attachment portion to which the rotation detection device itself is attached.   The rotation detecting device according to claim 5, wherein the attachment portion is integrally formed so as to cover one or both of a part of the main body part and a part of the signal transmission part.

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