JP2022008112A - Circuit module, circuit arrangement, cloth product and manufacturing method for cloth product - Google Patents

Abstract

To provide a circuit module capable of facilitating mounting on a cloth product.SOLUTION: A circuit module 101 includes a circuit board 20 and circuits 10, 40 arranged on the circuit board. The circuit board is formed with through holes 30A, 30B each having an internal diameter to permit a conductive thread to pass through, and an inner face 31 of the through hole is formed with a conductor 32 serving as a feeding point from the conductive thread with the conductive thread 102 passing through the through hole as an antenna, where the conductor and the circuit are connected with each other.SELECTED DRAWING: Figure 1

Description

Patent Law Article 30, Paragraph 2 Application Applicable "IEEE MTT-S Wireless Power Transfer Conference 2020" held online (http://wptc2020.org) from November 15th to 19th, 2020. /)) (WPTC-W1O: Microwave RF Wireless Power Transfer III W1O.5 (10: 00-10: 15))

The present disclosure relates to circuit modules, circuit devices, fabric products, and methods for manufacturing fabric products.

There are cases where it is desired to attach a load such as an LED (Light Emitting Diode) to a cloth product such as clothing. In this case, a method of attaching a circuit module having a load circuit or a circuit for power supply to the fabric with an adhesive can be considered.

Japanese Unexamined Patent Publication No. 2019-37355

However, if the circuit module is attached using an adhesive, there is a problem that an adhesive process is required in the process of manufacturing the cloth product, in addition to the sewing process. In addition, cloth products to which a circuit module is attached with an adhesive may not be washable or may be difficult to wash, and are not suitable for cloth products for which washing is desired.

The present disclosure provides circuit modules, circuit devices, fabric products so manufactured, and methods of manufacturing the fabric products that can be easily attached to the fabric products.

According to one embodiment, the circuit board comprises a circuit board, a circuit arranged on the circuit board and to which an antenna is connected, and the circuit board is inserted with one or more conductive threads to be antennas. A through hole is formed, and the circuit has a conductor on the inner surface of the through hole, which serves as a feeding point for the conductive thread serving as an antenna.

According to another embodiment, the circuit board comprises a circuit board and a circuit board having a circuit arranged on the circuit board and to which an antenna is connected, and a conductive thread serving as an antenna. One or more through holes through which the conductive threads are inserted are formed, and the circuit has a conductor on the inner surface of the through holes, which serves as a feeding point for the conductive threads to be an antenna.

According to another embodiment, the cloth product is sewn by a circuit board, a circuit module having a circuit arranged on the circuit board and to which an antenna is connected, a conductive thread serving as an antenna, and a conductive thread. A fabric to which a circuit module is attached is provided, and one or a plurality of through holes through which conductive threads are inserted are formed in the circuit board, and the circuit is formed on the inner surface of the through holes to serve as a feeding point for the conductive threads. It has a body, the conductive thread is inserted into a through hole so that a point in contact with the conductor is a feeding point, and the conductive thread is further sewn into a fabric.

According to another embodiment, the method for manufacturing a cloth product is a method for manufacturing a cloth product in which a circuit module is sewn on a cloth, and the circuit module is arranged on a circuit board and a circuit board, and an antenna is connected to the circuit board. The circuit board is formed with one or more through holes through which conductive threads are inserted, and the circuit has a conductor on the inner surface of the through holes, which serves as a feeding point for the conductive threads to be an antenna. The present invention includes inserting a conductive thread through the through hole and sewing the conductive thread inserted through the through hole into the fabric.

Further details will be described in the embodiments described below.

FIG. 1 is a conceptual diagram of a circuit device according to an embodiment. FIG. 2 is a front schematic view of the circuit device according to the first embodiment. FIG. 3 is a schematic cross-sectional view taken along the line AA of FIG. FIG. 4 is a diagram showing another example of how to thread the conductive thread. FIG. 5 is a diagram showing another example of how to thread the conductive thread. FIG. 6 is a circuit diagram showing an example of a circuit arranged in a circuit module. FIG. 7 is a diagram in which the connection relationship of the circuit of FIG. 6 is arranged. FIG. 8 is a circuit diagram showing an example of a gamma matching circuit arranged in a circuit module. FIG. 9 is a graph showing the results of gamma matching using the circuit device according to the embodiment. FIG. 10 is a flowchart showing the outline of the flow of the manufacturing method of the cloth product. FIG. 11 is a diagram showing an example of a cloth product. FIG. 12 is a diagram showing an example of a cloth product. FIG. 13 is a front schematic view of the circuit device according to the second embodiment. FIG. 14 is a schematic cross-sectional view taken along the line AA of FIG. FIG. 15 is a front schematic view of the circuit device according to the third embodiment. FIG. 16 is a schematic cross-sectional view taken along the line AA of FIG.

<1. Overview of circuit modules, circuit devices, fabric products, and manufacturing methods for fabric products>

(1) The circuit module according to the embodiment includes a circuit board, a circuit arranged on the circuit board and to which an antenna is connected, and one or a plurality of conductive threads to be inserted into the circuit board. The through hole is formed, and the circuit has a conductor on the inner surface of the through hole, which serves as a feeding point for the conductive thread serving as an antenna.

Since the through hole through which the conductive thread is inserted is formed, the conductive thread can be inserted through the through hole. Since the circuit has a conductor on the inner surface of the through hole, it can be used as a feeding point by contacting the conductive thread inserted through the through hole. That is, the conductive thread can be connected to the circuit module simply by inserting the conductive thread through the through hole, and can be easily used as an antenna. Further, when the conductive thread is used as an antenna, it can be connected only by inserting it in a place where it cannot be bonded using heat such as solder. Further, by sewing the inserted conductive thread to the fabric, a circuit device in which the conductive thread is connected to the circuit module can be easily attached to the fabric to manufacture a cloth product.

(2) Preferably, the point where the conductive thread inserted through the through hole comes into contact with the conductor forms a feeding point. As a result, the conductive thread can be easily connected as an antenna simply by inserting the through hole.

(3) Preferably, the conductor extends from the inner surface to the surface of the circuit board at least in a range covering the edge of the surface of the circuit board in the through hole. As a result, the conductive thread inserted through the through hole is easily in contact with the conductor, and the connection is facilitated.

(4) Preferably, in the region of the conductor extending on the surface of the circuit board, the length of the first orientation is longer than the length of the second orientation different from the first orientation, and the first. Orientation includes the orientation of the conductive thread inserted through the through hole extending along the surface of the circuit board. As a result, even when the conductive thread is wound around the through hole, the conductive thread easily comes into contact with the conductor, and the connection becomes easy.

(5) Preferably, the circuit includes a rectifier that rectifies the electromagnetic wave received as an antenna by the conductive thread inserted through the through hole into a direct current. As a result, the rectenna can be configured using the conductive thread as an antenna, and power can be supplied wirelessly.

(6) Preferably, the plurality of through holes include a first through hole and a second through hole, and the circuit is arranged in the conductor arranged in the first through hole and the second through hole. Includes a gamma matching circuit connected to the conductor. This makes it possible to perform gamma matching and change the impedance of the antenna to match the impedance of the rectifier. Further, even when one conductive thread is inserted into the first through hole and the second through hole, the connection between the conductors is short-circuited so that the one conductive thread functions as a dipole antenna. Can be done.

(7) Preferably, the circuit board is further formed with one or a plurality of fixing holes through which the conductive thread is inserted. Conductive threads inserted through at least one of the plurality of through holes are inserted into the fixing holes and sewn to the fabric, which facilitates the sliding of the circuit module, enables gamma matching, and after sliding. The position of the circuit module with respect to the fabric is easily maintained.

(8) Preferably, no conductor is arranged in the fixing hole. The fact that no conductor is formed in the fixing hole means that, for example, the surface of the circuit board, which is an insulator, is exposed on or near the inner surface of the fixing hole. Further, as another example, an insulator may be formed on the inner surface of the fixing hole or in the vicinity thereof. Since the conductor is not formed in the fixing hole, the fixing hole does not form a feeding point even if the conductive thread comes into contact with the fixing hole. As a result, the fixing hole can be used to hold the position of the circuit module without using it as a feeding point.

(9) Preferably, the fixing hole is arranged on the outer peripheral side of the circuit board rather than any of the plurality of through holes. As a result, the distance between the plurality of through holes can be shortened as compared with the case where the fixing holes are arranged on the inner peripheral side of the circuit module from the plurality of through holes. That is, the distance between the contact feeding points formed by the conductive threads in contact with the plurality of penetrations can be shortened. This makes it possible to facilitate gamma matching.

(10) Preferably, the plurality of fixing holes are arranged on the circuit board so as to sandwich the first through hole and the second through hole. As a result, the distance between the first through hole, the second through hole, and the plurality of through holes is larger than the fixing hole is arranged on the inner peripheral side of the circuit module from the first through hole and the second through hole. Can be shortened. This makes it possible to facilitate gamma matching.

(11) Preferably, the fixing holes are arranged on the same straight line as the plurality of through holes in the circuit board. The fact that the fixing holes are arranged on the same straight line as the plurality of through holes on the circuit board is, for example, a virtual straight line in which the center of the fixing holes is arranged at the center of each of the plurality of through holes. It means that the fixing holes are arranged so as to be on the top. This facilitates the sliding of the circuit module.

(12) Preferably, the circuit has a first feeder line connected to a first feeder formed in a conductor arranged in the first through hole and a conductor arranged in the second through hole. It further has a second feeder connected to a second feeder formed on the body, and a capacitor constituting a gamma matching circuit is provided on the first feeder. This enables gamma matching and allows one conductive thread to function as a dipole antenna.

(13) Preferably, the first feeding point and the second feeding point are connected by a conductive wire. This enables impedance matching when the first conductive thread is wound around the first through hole and the second conductive thread is wound around the second through hole and used as a dipole antenna.

(14) Preferably, the conductor is made of a highly corrosion resistant material and further comprises a sealant that seals the circuit on the surface of the circuit board. The sealant is, for example, a resin. This makes it possible to prevent water and dust from entering the circuit arranged on the circuit board. Therefore, the cloth product to which the circuit module is attached can be used outdoors or washed.

(15) The circuit device according to the embodiment includes the circuit module according to (1) to (14) and a conductive thread as an antenna, and one or a plurality of conductive threads are inserted into the circuit board. The through hole is formed, and the circuit has a conductor on the inner surface of the through hole, which serves as a feeding point for the conductive thread serving as an antenna. As a result, by sewing the conductive thread on the fabric, it can be easily attached to the fabric to manufacture a cloth product.

(16) Preferably, the plurality of through holes include a first through hole and a second through hole, and the conductive thread is inserted through both the first through hole and the second through hole to form a circuit. Attached to the module, the conductive thread receives electromagnetic waves as a dipole antenna having a portion extending from the first through hole as a first element and a portion extending from the second through hole as a second element. As a result, the rectenna can be configured using the conductive thread as an antenna, and power can be supplied wirelessly.

(17) Preferably, the circuit module is slidably attached to the conductive thread. By sliding, the position with respect to the conductive thread can be adjusted to change the length of the antenna, the impedance of the antenna can be changed, and gamma matching becomes possible.

(18) Preferably, the circuit includes a gamma matching circuit connected to a conductor arranged on the inner surface of the first through hole and a conductor arranged on the inner surface of the second through hole, and is a circuit module. Is configured to be slid to a position where gamma matching is established to determine the position with respect to the conductive yarn. This makes it possible to perform gamma matching and change the impedance of the antenna to match the impedance of the rectifier.

(19) Preferably, the conductive yarn is wound around each of the first through hole and the second through hole in the same direction. As a result, the circuit module can be slidably attached to the conductive thread.

(20) The cloth product according to the embodiment includes the circuit device according to (15) to (19) and a fabric to which a circuit module is attached by being sewn with a conductive thread, and the conductive thread is further provided. , Is sewn on the fabric. As a result, the circuit device can be easily attached to the fabric by the sewing process, and the fabric product can be manufactured.

(21) The method for manufacturing a cloth product according to an embodiment is the method for manufacturing a cloth product according to (20), in which a conductive thread that receives electromagnetic waves as an antenna is passed through a through hole, and a dielectric thread is inserted through the through hole. Includes sewing on the fabric. As a result, the circuit device can be easily attached to the fabric by the sewing process, and the fabric product can be manufactured.

<2. Examples of circuit modules, circuit devices, fabric products, and methods for manufacturing fabric products>

With reference to FIG. 1, the circuit module 101 according to the embodiment includes a circuit board 20 and a circuit arranged on the circuit board 20. The circuit includes a matching circuit 50, a rectifier circuit 10, and a load circuit 40 (FIG. 2, etc.) including a load such as an LED (Light Emitting Diode) 41. An antenna is connected to the matching circuit 50. The antenna to be connected is a dipole antenna composed of a first antenna element AE1 and a second antenna element AE2. The circuit and the first antenna element AE1 and the second antenna element AE2 are connected at feeding points K1 and K2, respectively.

[First Embodiment]

With reference to FIGS. 2 and 3, the circuit device 100 according to the first embodiment includes a circuit module 101 and a conductive thread 102. The surface of the circuit board 20 of the circuit module 101 on which one or more circuits are arranged is defined as the surface 21.

The circuit board 20 is formed with a through hole through which the conductive thread 102 is inserted. The through hole through which the conductive thread 102 is inserted has an inner diameter larger than the thickness of the conductive thread 102. Preferably, a plurality of through holes are formed. As an example, as shown in FIG. 2, two through holes 30A and 30B are formed.

A conductor 32 is formed on the inner surface 31 of each of the through holes 30A and 30B. Preferably, the conductor 32 is made of a highly corrosion resistant material. The highly corrosion resistant material used here is preferably gold. For example, the inner surface 31 of each of the through holes 30A and 30B is gold-plated. By forming the conductor 32 with a highly corrosion-resistant material such as gold, both conductivity and corrosion resistance are compatible. This makes it less likely to rust due to water or sweat.

Preferably, as shown in FIGS. 2 and 3, the rectifier circuit 10, the matching circuit 50, and the load circuit 40 arranged on the surface 21 of the circuit board 20 are sealed on the surface 21 by the sealant 22. Has been done. In FIG. 2, the sealing body 22 is represented by a dotted line in order to represent the circuit arranged on the surface 21. The sealant 22 is, for example, a resin. This makes it possible to prevent water and dust from entering the circuit arranged on the surface 21 of the circuit board 20. Therefore, the cloth product C can be used outdoors or washed.

The conductive thread 102 functions as antennas AE1 and AE2 (FIG. 1) by being inserted through the through holes 30A and 30B, and receives electromagnetic waves. The electromagnetic wave is, for example, a radio wave. The conductive thread 102 has conductivity and is preferably a thread formed of a highly corrosion-resistant material. As an example, the conductive thread 102 is a silver thread. As a result, the conductive thread 102 is less likely to rust due to water, sweat, or the like.

By inserting the conductive thread 102 into the through holes 30A and 30B, the circuit module 101 can be attached to the fabric C1 by using the conductive thread 102. That is, the circuit module 101 is attached to the fabric C1 by being sewn with the conductive thread 102 to become the cloth product C.

Normally, when attaching the circuit module 101 to the fabric C1, a step of attaching using a material different from sewing such as an adhesive is required. In this respect, by attaching by sewing using the conductive thread 102, the manufacturing process of the cloth product C to which the circuit module 101 is attached can be the same as the sewing process of the normal cloth product. Therefore, it is not necessary to provide a separate process such as bonding, and the production can be facilitated.

Since the conductor 32 is arranged on the inner surface 31 of each of the through holes 30A and 30B, the points K1 and K2 where the conductive thread 102 inserted through the through holes 30A and 30B are in contact with the conductor 32 form a feeding point. .. Preferably, the conductor 32 on the inner surface 31 of the through holes 30A and 30B is continuous by forming with a print pattern or the like. As a result, the resistance of the dipole antenna can be suppressed when the conductive thread 102 is inserted to function as a dipole antenna described later.

When connecting the antenna to the feeding points K1 and K2 on the circuit, usually, an adhesive means such as solder is used. However, since the circuit device 100 according to the embodiment uses a thread as an antenna, it cannot be bonded using heat such as solder. In this regard, since the conductor 32 is arranged on the inner surface 31 of each of the through holes 30A and 30B of the circuit module 101, the conductive thread 102 is inserted through the through holes 30A and 30B, so that the antenna is connected to the feeding points K1 and K2. Be connected. That is, it is possible to connect a conductive thread-shaped antenna without performing adhesion using heat such as solder.

Preferably, the conductor 32 extends from the inner surface 31 of each of the through holes 30A and 30B to the surface 21 of the circuit board 20 so as to cover at least the edge portion 35 of the surface 21 of the circuit board 20 of the through holes 30A and 30B. ing. More preferably, it extends beyond the edge 35 to the surface 21. As a result, the conductive thread 102 passed through the through holes 30A and 30B is likely to come into contact with the conductor 32, and the antenna is easily connected. Specifically, the conductive thread 102 comes into contact with the feeding points K1 and K2, and also at the edge opposite to the feeding points K1 and K2 of the through holes 30A and 30B. In this way, it is possible to more reliably electrically bond by contacting at a plurality of places.

More preferably, the region of the conductor 32 extending on the surface 21 of the circuit board 20 has a length in a particular orientation longer than a length in another orientation. The specific orientation includes the orientation of the conductive thread 102 passed through the through holes 30A and 30B extending along the surface 21 of the circuit board 20.

As an example, the conductive thread 102 is fixed to the circuit module 101 as shown in FIGS. 2 and 3. That is, in FIGS. 2 and 3, the conductive thread 102 is wound around the through holes 30A and 30B in the same direction, respectively. At this time, the conductive thread 102 is inserted through the through hole 30A and extends toward the outer periphery along the surface 21 of the circuit board 20.

In the case of FIGS. 2 and 3, the conductor 32 has a length in the direction (first direction) from the through hole 30A toward the outer periphery, which is different from the length in the first direction (second direction). Is also long. Specifically, the length L1 in the first direction is longer than the length L2 in the direction toward the center (L1> L2). Further, the length L1 in the first direction is longer than the length L3 in the direction orthogonal to the direction toward the center (L1> L3). This also applies to the conductor 32 around the through hole 30B. As a result, the conductive thread 102 passed through the through holes 30A and 30B is likely to come into contact with the conductor 32, and the antenna is easily connected.

By setting the conductive thread 102 with respect to the circuit module 101 as shown in FIGS. 2 and 3, the circuit module 101 indicates the arrow A with respect to the cloth C1 in the range in which the conductive thread 102 is sewn to the cloth C1. It can be slidable in the direction and the direction of arrow B. This enables gamma matching, which will be described later.

The method of setting the conductive thread 102 shown in FIGS. 2 and 3 in the circuit module 101 is an example, and other methods may be used. In the circuit device 100 according to the first embodiment, any method may be used as long as one conductive thread 102 is continuously inserted into both the through holes 30A and 30B. Preferably, the circuit module 101 is set in such a way that it is slidable with respect to the fabric C1. For example, it is not necessary to wind the conductive thread 102 around both the through holes 30A and 30B, and only one of them or either of them may be wound without winding.

That is, the conductive thread 102 is inserted through the through holes 30A and 30B without being wound, and the conductive threads are inserted through the through holes 30A and 30B into either the front surface 21 of the circuit board 20 or the opposite surface (back surface). It may be a method of extending 102. In this case, preferably, the region extending from the surface 21 of the circuit board 20 of the conductor 32 has a length extending from the through holes 30A and 30B on the surface 21 of the circuit board 20 of the conductive thread 102 in another direction. Make it longer.

Specifically, as shown in FIG. 4, the case where the conductive thread 102 is extended from each of the through holes 30A and 30B to the back surface side, and the case where the conductive thread 102 is extended to the front surface 21 side as shown in FIG. And will be explained. In the case of FIG. 4, since the conductive thread 102 extends toward the center on the surface 21 of the circuit board 20, the length L12 extended toward the center of the conductor 32 is the length extended toward the outer periphery. Longer than L11. Further, in the case of FIG. 5, since the conductive thread 102 extends toward the outer periphery on the surface 21 of the circuit board 20, the length L212 extending toward the outer periphery of the conductor 32 is extended toward the center. It is longer than the length L22. As a result, the conductive thread 102 passed through the through holes 30A and 30B can easily come into contact with the conductor 32, and the formation of the feeding point can be made more reliable.

With reference to FIGS. 2 and 6, the circuit arranged on the surface 21 of the circuit board 20 includes a rectifier circuit 10. The rectifier circuit 10 includes a rectifier 11. The electromagnetic wave received by the conductive thread 102 that functions as an antenna is supplied to the rectifier circuit 10.

The rectifier 11 rectifies and converts the electromagnetic wave received by the conductive thread 102 into a direct current and supplies it to another circuit. The other circuit is, for example, a load circuit 40 including a load such as an LED (Light Emitting Diode) 41. As a result, the load circuit 40 can consume electric power. That is, the LED 41 can be turned on.

The circuit arranged on the surface 21 of the circuit board 20 further includes a matching circuit 50. The matching circuit 50 is a circuit that matches the impedance of the conductive thread 102 that functions as an antenna and the rectifier 11, and the circuit module 101 according to the first embodiment performs gamma matching.

The matching circuit 50 is connected to the conductor 32 arranged on the inner surface 31 of the through hole 30A and the conductor 32 arranged on the inner surface 31 of the through hole 30B, and the feeding points K1 and K2 formed on the conductor 32. including. The matching circuit 50 for gamma matching further includes a capacitor 51. The capacitor 51 may be a variable capacitor. The capacitor 51 is arranged on the feeder line connected to the feeder point K1 and is connected to the first portion 102A.

The conductive thread 102 is divided into a first portion 102A extending from the feeding point K1, a second portion 102B extending from the feeding point K2, and a third portion 102C between the feeding point K1 and the feeding point K2. To.

With reference to FIG. 7, the first feeder line 52 is connected to the feed point K1 and the second feeder line 53 is connected to the feed point K2. A capacitor 51 constituting the matching circuit 50 is provided on the first feeder line 52.

Since the capacitor 51 is provided on the first feeder line 52, the connection between the feeding point K1 and the feeding point K2 by the third portion 102C is short-circuited, and the first portion 102A extending from the feeding point K1 is the first. The second portion 102B extending from the antenna element AE1 and the feeding point K2 of No. 1 functions as the second antenna element AE2 and is equivalent to the circuit shown in FIG. That is, a dipole antenna is realized by one conductive thread 102.

The gamma match in the matching circuit 50 will be described with reference to FIG. With reference to FIG. 8, as shown in FIG. 3, the conductive thread 102 functions as a dipole antenna by sliding the circuit module 101 in the direction of arrow A and the direction of arrow B with respect to the fabric C1. The positions of the feeding points K1 and K2 on the above change. This makes it possible to change the impedance of the dipole antenna. By locating the feeding points K1 and K2 closer to the center of the conductive thread 102, the impedance of the antenna element can be lowered, and the impedance can be increased toward the end. As a result, it is matched with the impedance of the rectifier 11.

When the frequency f of the transmitted electromagnetic wave is 2.45 GHz and the wavelength of the electromagnetic wave is λ, the total length of the first antenna element AE1 and the second antenna element AE2, that is, the conductive thread functioning as a dipole antenna. The total length L of 102 is λ / 2, which is approximately 6 cm. In this case, the length LB of the second portion 102B is set to half of the total length L, that is, about 3 cm, that is, the feeding point K2 is approximately the center. From that state, the impedance of the antenna is matched with the impedance of the rectifier 11 by moving the circuit module 101 on the conductive thread 102. Thereby, the position of the circuit module 101 with respect to the conductive thread 102, that is, the length LA of the first portion 102A and the length LB of the second portion 102B can be determined. That is, in the circuit device 100 according to the first embodiment, impedance matching can be easily performed by sliding the circuit module 101 with respect to the cloth C1.

The curves E1 to E3 shown in FIG. 9 are gamma-matched by using the cloth product C to which the circuit device 100 according to the embodiment is attached to the cloth C1 and setting the frequency of the received electromagnetic wave to 2.45 GHz. The result of the time is shown.

In FIG. 9, the curves E1 to E3 are the results of using the first to third conductive threads, respectively, and are VSWR (Voltage Standing Wave Ratio) for each frequency of the electromagnetic wave of the circuit device 100. ). The closer VSWR is to 1, the more ideal, whereas in all of the curves E1 to E3, VSWR is closer to 1 at 2.45 GHz. Therefore, in the circuit device 100 according to the embodiment, it was confirmed that the impedance of the antenna and the impedance of the rectifier 11 are sufficiently matched by the above method.

As an example of the outline of the manufacturing method of the cloth product C, the flow shown in FIG. 10 can be considered. That is, with reference to FIG. 10, the conductive thread 102 is passed through the through hole 30 of the circuit module 101 by a needle or the like (step S1), passed through, and then sewn to the fabric C1 (step S2).

In steps S1 and S2, as shown in FIGS. 3 to 5, the circuit module 101 is sewn to the fabric C1 so as to be slidable. In the case of the example of FIG. 2, for example, assuming that sewing proceeds from the left side to the right side of the figure, the conductive thread 102 is passed through the lower surface from the mounting side (hereinafter referred to as the upper surface) of the circuit module 101 of the fabric C1, and further from the lower surface to the upper surface. The conductive thread 102 is passed through the through hole 30A from the lower surface side toward the surface 21. The conductive thread 102 protruding from the surface 21 side of the through hole 30A is wound around the outer peripheral side of the circuit module 101 and passed to the lower surface of the fabric C1 again.

Next, the conductive thread 102 is passed from the lower surface to the upper surface of the fabric C1 and from the outer peripheral side of the circuit module 101 to the surface 21 of the through hole 30B. The conductive thread 102 coming out from the lower surface through the through hole 30B is passed from the upper surface to the lower surface of the fabric C1 and then passed through the upper surface again.

Gamma matching is performed by sliding the sewn circuit module 101 with respect to the fabric C1 in the direction of arrow A or the direction of arrow B (step S3). Based on the result, the position of the circuit module 101 in the fabric C1 is determined (step S4).

When a plurality of cloth products C are manufactured, such as mass production, it is not necessary to perform gamma matching to determine the position each time. For example, a gamma match may be performed on a prototype in the design process to determine the position, and in the subsequent mass production process, the circuit module 101 may be attached to the determined position.

Examples of the cloth product C manufactured in this manner include clothing such as a bracelet shown in FIG. 11 and clothing such as socks shown in FIG. 12. For such a cloth product C, for example, an LED can be turned on by wireless power supply. Therefore, it becomes possible to provide the cloth product C having excellent fashionability and design. In addition, it can be applied to cloth products such as those that are expected to get wet because they are resistant to sweat and water, those that may come into contact with sweat, and those that require washing.

[Second Embodiment]

As another example of the circuit device 100, two conductive threads may be tied together. That is, as shown in FIG. 13, different conductive threads 102D and 102E may be inserted into the two through holes 30A and 30B provided in the circuit board 20, respectively. Specifically, as shown in FIGS. 13 and 14, the conductive threads 102D and 102E may be inserted into the through holes 30A and 30B, respectively, and the fabric C1 may be sewn and tied. In this case, the conductive threads 102D and 102E function as the first antenna element AE1 and the second antenna element AE2, respectively, and even in this case, they are equivalent to the circuit of FIG.

In this case, preferably, as shown in FIG. 14, the conductors 32 provided in the through holes 30A and 30B are connected by the conductive wires 54. As an example, the conductive wire 54 is provided on the back surface side of the circuit board 20.

By providing the conductive wire 54, the feeding point K1 and the feeding point K2 are connected, and gamma matching becomes possible in the matching circuit 50. As a result, different conductive threads 102D and 102E are inserted into the two through holes 30A and 30B as shown in FIGS. 13 and 14, respectively, in the same manner as in the method described in FIG. , Gamma matching can be performed in the matching circuit 50.

[Third Embodiment]

As another example of the circuit device 100, the circuit board 20 may be further formed with fixing holes. The fixing hole is used for holding the position of the circuit module 101 with respect to the fabric C1 when the circuit module 101 is attached to the fabric C1 by being sewn by the conductive thread 102. The fixing hole has an inner diameter larger than the thickness of the conductive thread 102, and the conductive thread 102 is inserted through the fixing hole. The inner diameter of the fixing hole may be the same as that of the through holes 30A and 30B. Thereby, the manufacturing can be facilitated.

Preferably, a plurality of fixing holes are formed. As an example, the circuit board 20 of the circuit module 101 according to the third embodiment is formed with two through holes 61A and 61B for fixing, as shown in FIGS. 15 and 16. In the through holes 30A and 30B, the conductor 32 is formed on the inner surface 31 of each, but the conductor is not formed on the inner surface 62 of the fixing holes 61A and 61B.

The fact that the conductor is not formed on the inner surface 62 of each of the fixing holes 61A and 61B is, for example, that the surface of the circuit board 20 which is an insulator is exposed on or near the inner surface 62 of the fixing holes 61A and 61B. Refers to that. Further, as another example, an insulator may be formed on or near the inner surface 62 of the fixing holes 61A and 61B.

Since no conductor is formed on the inner surface 62 of each of the fixing holes 61A and 61B, the fixing holes 61A and 61B do not form a feeding point on or near the inner surface 62 even if the conductive thread 102 comes into contact with the fixing holes 61A and 61B. .. As a result, the fixing holes 61A and 61B can be used to hold the position of the circuit module 101 without using it as a feeding point.

The circuit module 101 according to the third embodiment is inserted by a conductive thread 102 inserted through at least one of the through holes 30A and 30B. Preferably, the end portion of the conductive thread 102 on the side inserted through the through hole 30A is inserted into the fixing hole 61A formed in the vicinity of the through hole 30A, and the end portion on the side inserted through the through hole 30B is the through hole. It is inserted into the fixing hole 61B formed in the vicinity of 30B. In other words, one conductive thread 102 is continuously inserted in the order of the fixing hole 61A, the through hole 30A, the through hole 30B, and the fixing hole 61B.

At that time, the circuit module 101 is sewn on the fabric C1 by the conductive thread 102. With reference to FIG. 16, for example, assuming that sewing proceeds from the left side to the right side of the drawing, the conductive thread 102 is passed through the upper surface from the lower surface of the fabric C1 through the fixing hole 61A and toward the surface 21 of the circuit module 101. Pass the conductive thread 102. Next, the conductive thread 102 exiting from the lower surface of the fabric C1 through the through hole 30A from the surface 21 of the circuit module 101 is passed from the lower surface to the upper surface of the fabric C1, and the through hole 30B is passed toward the surface 21. Next, the conductive thread 102 is taken out from the surface 21 of the circuit module 101 through the fixing hole 61B and from the lower surface of the fabric C1.

By attaching the circuit module 101 according to the third embodiment to the fabric C1 in this way, the circuit module 101 can slide in the direction of the arrow A and the direction of the arrow B with respect to the fabric C1. In addition, the position of the circuit module 101 with respect to the fabric C1 after movement is easily maintained. Therefore, the inner diameters of the fixing holes 61A and 61B may be larger than those of the through holes 30A and 30B. This facilitates the sliding of the circuit module 101. Alternatively, the inner diameters of the fixing holes 61A and 61B may be smaller than the through holes 30A and 30B. As a result, the position of the circuit module 101 with respect to the fabric C1 after movement is easily fixed.

Further, the fixing holes 61A and 61B may be arranged on the same straight line as the through hole 30A and the through hole 30B in the circuit board 20. Specifically, in the example of FIG. 15, the fixing holes 61A and 61B are on a virtual straight line SL in which the respective centers P3 and P4 are arranged at the centers P1 and P2 of the through hole 30A and the through hole 30B. Is located in. The fixing holes 61A and 61B, the through holes 30A, and the through holes 30B do not need to have their centers P1, P2, P3, and P4 located on a virtual straight line SL, and are any of the holes. It suffices if the position is located on a virtual straight line SL. This facilitates the sliding of the circuit module 101. Alternatively, the fixing holes 61A and 61B may be arranged at positions deviating from the straight line in which the through holes 30A and the through holes 30B are arranged. This makes it easier to fix the position of the circuit module 101 with respect to the fabric C1 after movement.

Further, preferably, the fixing holes 61A and 61B are all arranged on the outer peripheral side of the circuit module 101 from the through holes 30A and 30B. That is, the fixing hole 61A is formed on the side farther from the through hole 30B of the through hole 30A, and the fixing hole 61B is formed on the side farther than the through hole 30A of the through hole 30B. As a result, the distance between the through holes 30A and 30B can be shortened as compared with the case where the fixing holes 61A and 61B are arranged on the inner peripheral side of the circuit module 101 from the through holes 30A and 30B. That is, the interval between the feeding points K1 and K2 can be shortened. This makes it possible to facilitate the above gamma matching.

<3. Addendum>
The present invention is not limited to the above embodiment, and various modifications are possible.

10: Rectifier circuit 11: Rectifier 20: Circuit board 21: Surface 22: Sealing body 30: Through hole 30A: Through hole 30B: Through hole 31: Inner surface 32: Conductor 33: Feed line 35: Edge 40: Load circuit 41: LED
50: Matching circuit 51: Variable condenser 52: First feeder line 53: Second feeder line 54: Conductive wire 61A: Fixing hole 61B: Fixing hole 62: Inner surface 100: Circuit device 101: Circuit module 102: Conductive thread 102A : First part 102B: Second part 102C: Third part A: Arrow AE1: First antenna element AE2: Second antenna element B: Arrow C: Cloth product C1: Fabric K1: Feeding point K2: Feed point L1: Length L2: Length L3: Length LA: Length LB: Length L: Total length P1: Center P2: Center P3: Center P4: Center SL: Straight line f: Frequency

Claims (21)

With the circuit board
A circuit arranged on the circuit board and to which an antenna is connected is provided.
The circuit board is formed with one or a plurality of through holes through which a conductive thread serving as an antenna is inserted.
The circuit is a circuit module having a conductor on the inner surface of the through hole, which serves as a feeding point for the conductive thread serving as an antenna. The circuit module according to claim 1, wherein the point where the conductive thread inserted through the through hole comes into contact with the conductor forms the feeding point. The circuit module according to claim 1 or 2, wherein the conductor extends from the inner surface to the surface of the circuit board so as to cover at least the edge of the surface of the circuit board in the through hole. The region of the conductor extending on the surface of the circuit board has a length in the first orientation longer than a length in the second orientation different from the first orientation.
The circuit module according to any one of claims 1 to 3, wherein the first orientation includes a direction in which the conductive thread inserted through the through hole extends along the surface of the circuit board. The circuit module according to any one of claims 1 to 4, wherein the circuit includes a rectifier that rectifies an electromagnetic wave received as an antenna by the conductive thread inserted through the through hole into a direct current. The plurality of through holes include a first through hole and a second through hole.
The circuit according to claim 5, wherein the circuit includes a gamma matching circuit connected to the conductor arranged in the first through hole and the conductor arranged in the second through hole. module. The circuit module according to claim 6, wherein the circuit board is further formed with one or a plurality of fixing holes through which the conductive thread is inserted. The circuit module according to claim 7, wherein the conductor is not arranged in the fixing hole. The circuit module according to claim 7 or 8, wherein the fixing hole is arranged on the outer peripheral side of the circuit board more than any of the plurality of through holes. The plurality of fixing holes according to any one of claims 7 to 9, wherein the fixing holes are arranged on the circuit board so as to sandwich the first through hole and the second through hole. Circuit module. The circuit module according to any one of claims 7 to 10, wherein the fixing hole is arranged on the same straight line as the plurality of through holes in the circuit board. The circuit is
A first feeder connected to a first feeder formed in the conductor arranged in the first through hole, and a first feeder.
Further having a second feeder line connected to a second feeder formed in the conductor arranged in the second through hole.
The circuit module according to claim 6, wherein a capacitor constituting the gamma matching circuit is provided on the first feeding line. The circuit module according to claim 12, wherein the first feeding point and the second feeding point are connected by a conductive wire. The conductor is made of a highly corrosion resistant material and is made of a highly corrosion resistant material.
The circuit module according to any one of claims 1 to 6, 12, and 13, further comprising a sealant that seals the circuit on the surface of the circuit board. A circuit board and a circuit module having a circuit arranged on the circuit board and to which an antenna is connected.
Equipped with a conductive thread that serves as an antenna,
The circuit board is formed with one or a plurality of through holes through which the conductive thread is inserted.
The circuit is a circuit device having a conductor on the inner surface of the through hole, which serves as a feeding point for the conductive thread serving as an antenna. The plurality of through holes include a first through hole and a second through hole.
The conductive thread is inserted into both the first through hole and the second through hole and attached to the circuit module.
The circuit according to claim 15, wherein the conductive thread receives an electromagnetic wave as a dipole antenna having a portion extending from the first through hole as a first element and a portion extending from the second through hole as a second element. Device. The circuit device according to claim 16, wherein the circuit module is slidably attached to the conductive thread. The circuit includes a gamma matching circuit connected to the conductor arranged on the inner surface of the first through hole and the conductor arranged on the inner surface of the second through hole.
The circuit device according to claim 17, wherein the circuit module is configured to be slid to a position where gamma matching is established to determine a position with respect to the conductive yarn. The circuit device according to any one of claims 16 to 18, wherein the conductive yarn is wound in the same direction in each of the first through hole and the second through hole. A circuit board and a circuit module having a circuit arranged on the circuit board and to which an antenna is connected.
Conductive thread that becomes an antenna and
With a fabric to which the circuit module is attached by being sewn with the conductive thread.
The circuit board is formed with one or a plurality of through holes through which the conductive thread is inserted.
The circuit has a conductor on the inner surface of the through hole, which serves as a feeding point for the conductive yarn.
The conductive thread is inserted into the through hole so that the point in contact with the conductor is the feeding point.
The conductive thread is a cloth product sewn on the fabric. A method of manufacturing fabric products in which circuit modules are sewn on fabric.
The circuit module has a circuit board and a circuit arranged on the circuit board and to which an antenna is connected.
The circuit board is formed with one or more through holes through which conductive threads are inserted.
The circuit has a conductor on the inner surface of the through hole, which serves as a feeding point for the conductive thread serving as an antenna.
The conductive thread is inserted through the through hole, and the conductive thread is inserted.
A method for manufacturing a cloth product, which comprises sewing the conductive thread inserted through the through hole into a fabric.

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