CIRCUIT MODULE, CIRCUIT DEVICE, CLOTH PRODUCT, AND METHOD FOR MANUFACTURING CLOTH PRODUCT

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

[Technical field]

[0001] The present disclosure relates to a circuit module, a circuit device, a fabric product, and a method for manufacturing the fabric product. [Background technology]

[0002] There are cases where a user wishes to attach a load such as an LED (Light Emitting Diode) to a fabric product such as clothing. In such cases, a method can be considered in which a circuit module having a load circuit and a power supply circuit is attached to the fabric with adhesive. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-37355 A Summary of the Invention

[0004] However, when a circuit module is attached using an adhesive, there is a problem that a bonding process separate from sewing is required during the manufacturing process of the cloth product. Also, cloth products to which circuit modules are attached using an adhesive may not be washable or may be difficult to wash, making them unsuitable for cloth products that are intended to be washable.

[0005] The present disclosure provides a circuit module that can be easily attached to a fabric product, a circuit device, a fabric product manufactured using such a circuit module, and a method for manufacturing the fabric product.

[0006] According to one embodiment, a circuit module comprises a circuit board and a circuit arranged on the circuit board and connected to an antenna, the circuit board having one or more through holes through which a conductive thread serving as an antenna is inserted, and the circuit has a conductor on an inner surface of the through hole that serves as a power supply point for the conductive thread serving as the antenna.

[0007] According to another embodiment, a circuit device includes a circuit board, a circuit module arranged on the circuit board and having a circuit to which an antenna is connected, and a conductive thread serving as the antenna, wherein the circuit board has one or more through holes through which the conductive thread is inserted, and the circuit has a conductor on the inner surface of the through hole that serves as a power supply point to the conductive thread serving as the antenna.

[0008] According to another embodiment, a fabric product comprises a circuit board, a circuit module arranged on the circuit board and having a circuit to which an antenna is connected, a conductive thread which serves as the antenna, and fabric to which the circuit module is attached by sewing with the conductive thread, the circuit board is formed with one or more 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 power supply point for the conductive thread, the conductive thread is inserted into the through hole so that the point where it contacts the conductor serves as the power supply point, and the conductive thread is further sewn to the fabric.

[0009] According to another embodiment, a method for manufacturing a fabric product is a method for manufacturing a fabric product in which a circuit module is sewn into fabric, the circuit module having a circuit board and a circuit arranged on the circuit board and connected to an antenna, the circuit board having one or more through holes through which a conductive thread is inserted, the circuit having a conductor on an inner surface of the through hole that serves as a power supply point for the conductive thread that serves as the antenna, the method including inserting the conductive thread into the through hole and sewing the conductive thread inserted into the through hole to the fabric.

[0010] Further details will be described in the following embodiments. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a conceptual diagram of a circuit device according to an embodiment. [Diagram 2] FIG. 2 is a schematic front view of the circuit device according to the first embodiment. [Diagram 3] FIG. 3 is a schematic cross-sectional view taken along line AA of FIG. [Figure 4] FIG. 4 is a diagram showing another example of how the conductive thread is threaded. [Diagram 5]FIG. 5 is a diagram showing another example of how the conductive thread is threaded. [Figure 6] FIG. 6 is a circuit diagram showing an example of a circuit arranged in a circuit module. [Figure 7] FIG. 7 is a diagram showing the connections of the circuit in FIG. [Figure 8] FIG. 8 is a circuit diagram showing an example of a gamma matching circuit disposed in a circuit module. [Figure 9] FIG. 9 is a graph showing the results of gamma matching using the circuit device according to the embodiment. [Figure 10] FIG. 10 is a flow chart showing an outline of the flow of a manufacturing method for a fabric product. [Figure 11] FIG. 11 is a diagram showing an example of a fabric product. [Figure 12] FIG. 12 is a diagram showing an example of a fabric product. [Figure 13] FIG. 13 is a schematic front view of the circuit device according to the second embodiment. [Figure 14] FIG. 14 is a schematic cross-sectional view taken along line AA of FIG. [Figure 15] FIG. 15 is a schematic front view of a circuit device according to the third embodiment. [Figure 16] FIG. 16 is a schematic cross-sectional view taken along line AA of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] <1. Overview of the circuit module, the circuit device, the fabric product, and the fabric product manufacturing method>

[0013] (1) A circuit module in accordance with an embodiment of the present invention comprises a circuit board and a circuit arranged on the circuit board and connected to an antenna. The circuit board has one or more through holes through which a conductive thread serving as an antenna is inserted. The circuit has a conductor on the inner surface of the through hole that serves as a power supply point for the conductive thread serving as the antenna.

[0014] Since a through hole through which the conductive thread is inserted is formed, the conductive thread can be inserted into the through hole. Since the circuit has a conductor on the inner surface of the through hole, the conductive thread inserted into the through hole can be brought into contact with the circuit to serve as a power supply point. In other words, the conductive thread can be connected to the circuit module simply by inserting the conductive thread into the through hole, and can be easily used as an antenna. Furthermore, when using the conductive thread as an antenna, it is not possible to bond using heat such as solder, but it becomes possible to connect by simply inserting the conductive thread. Furthermore, by sewing the inserted conductive thread into the fabric, a circuit device in which the conductive thread is connected to the circuit module can be easily attached to the fabric, and a cloth product can be manufactured.

[0015] (2) Preferably, the point where the conductive thread inserted into the through hole comes into contact with the conductor forms a power supply point, which makes it possible to easily connect the conductive thread as an antenna by simply inserting it into the through hole.

[0016] (3) Preferably, the conductor extends from the inner surface to the surface of the circuit board to an extent that covers at least the edge of the through hole on the surface of the circuit board, making it easier for the conductive thread inserted into the through hole to come into contact with the conductor, facilitating connection.

[0017] (4) Preferably, the length of the region of the conductor extending on the surface of the circuit board in a first direction is longer than the length of the region in a second direction different from the first direction, and the first direction includes a direction in which the conductive thread inserted in the through hole extends along the surface of the circuit board. This makes it easier for the conductive thread to come into contact with the conductor even when the conductive thread is wound around the through hole, facilitating connection.

[0018] (5) Preferably, the circuit includes a rectifier that rectifies the electromagnetic waves received by the conductive thread inserted into the through hole as an antenna into a direct current. This allows the conductive thread to function as an antenna to form a rectenna, enabling power to be supplied wirelessly.

[0019] (6) Preferably, the plurality of through holes include a first through hole and a second through hole, and the circuit includes a gamma matching circuit connected to a conductor arranged in the first through hole and a conductor arranged in the second through hole. This allows gamma matching to be performed, changing the impedance of the antenna to match the impedance of the rectifier. Also, when a single conductive thread is inserted through the first through hole and the second through hole, the connection between the conductors is shorted, allowing the single conductive thread to function as a dipole antenna.

[0020] (7) Preferably, the circuit board further includes one or more fixing holes through which a conductive thread is inserted. The conductive thread is inserted into at least one of the through holes, and then inserted into the fixing hole and sewn to the fabric, which facilitates sliding of the circuit module and enables gamma matching, and also makes it easier to maintain the position of the circuit module relative to the fabric after sliding.

[0021] (8) Preferably, no conductor is disposed in the fixing hole. The absence of a conductor in the fixing hole refers, for example, to the surface of the circuit board, which is an insulator, being exposed on the inner surface of the fixing hole or in its vicinity. As another example, an insulator may be formed on the inner surface of the fixing hole or in its vicinity. Since no conductor is formed in the fixing hole, the fixing hole does not form a power supply point even if the conductive thread comes into contact with it. As a result, the fixing hole can be used to hold the position of the circuit module without serving as a power supply point.

[0022] (9) Preferably, the fixing holes are disposed on the outer periphery side of the circuit board relative to any of the plurality of through holes. This allows the intervals between the plurality of through holes to be shorter than when the fixing holes are disposed on the inner periphery side of the circuit module relative to the plurality of through holes. In other words, the intervals between the power supply points formed by the conductive threads contacting the plurality of through holes can be shortened. This makes it easier to perform gamma matching.

[0023] (10) Preferably, the multiple fixing holes are arranged on the circuit board so as to sandwich the first through hole and the second through hole therebetween. This allows the distance between the first through hole, the second through hole, and the multiple through holes to be shorter than when the fixing holes are arranged closer to the inner circumference of the circuit module than the first through hole and the second through hole. This makes it easier to perform gamma matching.

[0024] (11) Preferably, the fixing hole is arranged on the same straight line as the plurality of through holes in the circuit board. For example, the fixing hole is arranged on the same straight line as the plurality of through holes in the circuit board, where the fixing hole is arranged so that the center of the fixing hole is on a virtual straight line on which the centers of the plurality of through holes are arranged. This makes it easier to slide the circuit module.

[0025] (12) Preferably, the circuit further includes a first feed line connected to a first feed point formed on the conductor arranged in the first through hole, and a second feed line connected to a second feed point formed on the conductor arranged in the second through hole, and a capacitor constituting a gamma matching circuit is provided on the first feed line, which enables gamma matching and allows one conductive thread to function as a dipole antenna.

[0026] (13) Preferably, the first feed point and the second feed 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 to be used as a dipole antenna.

[0027] (14) Preferably, the conductor is made of a highly corrosion-resistant material and further includes a sealant that seals the circuit on the surface of the circuit board. The sealant is, for example, a resin. This can prevent water and dust from entering the circuit arranged on the circuit board. This makes it possible to use a fabric product with a circuit module attached outdoors and to wash it.

[0028] (15) A circuit device according to an embodiment includes the circuit module according to any one of (1) to (14) and a conductive thread serving as an antenna, the circuit board has one or more through holes through which the conductive thread is inserted, and the circuit has a conductor on the inner surface of the through hole that serves as a power supply point for the conductive thread serving as the antenna. This allows the conductive thread to be easily attached to fabric by sewing it to the fabric, thereby making it possible to manufacture a cloth product.

[0029] (16) Preferably, the plurality of through holes include a first through hole and a second through hole, the conductive thread is inserted through both the first through hole and the second through hole to be attached to the circuit module, and the conductive thread receives electromagnetic waves as a dipole antenna having a first element extending from the first through hole and a second element extending from the second through hole. This allows a rectenna to be configured using the conductive thread as an antenna, making it possible to supply power wirelessly.

[0030] (17) Preferably, the circuit module is attached so as to be freely slidable relative to the conductive thread. By sliding the circuit module, the position relative to the conductive thread can be adjusted to change the length of the antenna, and the impedance of the antenna can be changed, enabling gamma matching.

[0031] (18) Preferably, the circuit includes a gamma matching circuit connected to a conductor disposed on the inner surface of the first through hole and a conductor disposed on the inner surface of the second through hole, and the circuit module is configured to be slid to a position where gamma matching is established and a position relative to the conductive thread is determined. This allows gamma matching to be performed, changing the impedance of the antenna to match the impedance of the rectifier.

[0032] (19) Preferably, the conductive thread is wound around each of the first through hole and the second through hole in the same direction, whereby the circuit module can be attached to the conductive thread in a slidable manner.

[0033] (20) A fabric product according to an embodiment includes the circuit device according to any one of (15) to (19) above, and a fabric to which the circuit module is attached by sewing with conductive thread, the conductive thread being further sewn to the fabric, thereby making it possible to easily attach the circuit device to the fabric through a sewing process to manufacture the fabric product.

[0034] (21) A method for manufacturing a fabric product according to an embodiment of the present invention is the method for manufacturing a fabric product according to (20), which includes passing a conductive thread that receives electromagnetic waves as an antenna through the through hole and sewing the dielectric thread passed through the through hole to a fabric. This makes it possible to easily attach a circuit device to the fabric through a sewing process and manufacture the fabric product.

[0035] <2. Examples of circuit modules, circuit devices, fabric products, and fabric product manufacturing methods>

[0036] 1, a circuit module 101 according to an 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 connected antenna is a dipole antenna consisting 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.

[0037] [First embodiment]

[0038] 2 and 3, a circuit device 100 according to a first embodiment includes a circuit module 101 and conductive thread 102. A surface of a circuit board 20 of the circuit module 101 on which one or more circuits are arranged is referred to as a front surface 21.

[0039] 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, two through holes, 30A and 30B, are formed as shown in FIG. 2.

[0040] An electric conductor 32 is formed on the inner surface 31 of each of the through holes 30A, 30B. Preferably, the electric conductor 32 is formed from 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, 30B is gold-plated. By forming the electric conductor 32 from a highly corrosion-resistant material such as gold, both electrical conductivity and corrosion resistance are achieved. This makes it less likely to rust due to water, sweat, or the like.

[0041] Preferably, as shown in Fig. 2 and Fig. 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 a sealant 22. In Fig. 2, the sealant 22 is shown by a dotted line to represent the circuits 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 circuits arranged on the surface 21 of the circuit board 20. This makes it possible to use the fabric product C outdoors and to wash it.

[0042] The conductive thread 102 functions as antennas AE1, AE2 (FIG. 1) by being inserted into the through holes 30A, 30B, and receives electromagnetic waves. The electromagnetic waves are, for example, radio waves. The conductive thread 102 is a thread that is conductive and is preferably made of a highly corrosion-resistant material. As an example, the conductive thread 102 is a silver thread. This makes the conductive thread 102 less susceptible to rust due to water, sweat, etc.

[0043] The conductive thread 102 is inserted into the through holes 30A and 30B, whereby the circuit module 101 can be attached to the fabric C1 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, thereby forming the fabric product C.

[0044] Usually, when attaching the circuit module 101 to the fabric C1, an attachment process using a material other than sewing, such as an adhesive, is required. In this regard, by attaching the circuit module 101 by sewing using the conductive thread 102, the manufacturing process of the fabric product C to which the circuit module 101 is attached can be the same as the sewing process of a normal fabric product. Therefore, there is no need to provide a separate process such as gluing, and manufacturing can be simplified.

[0045] By disposing the conductor 32 on the inner surface 31 of each of the through holes 30A and 30B, points K1 and K2 where the conductive thread 102 inserted into the through holes 30A and 30B contacts the conductor 32 form power supply points. Preferably, the conductor 32 on the inner surface 31 of the through holes 30A and 30B is continuous by forming it with a print pattern, etc. This makes it possible to reduce the resistance of the dipole antenna when the conductive thread 102 is inserted to function as a dipole antenna, which will be described later.

[0046] When connecting antennas to the power supply points K1 and K2 on the circuit, an adhesive such as solder is usually used. However, in the circuit device 100 according to the embodiment, thread is used as the antenna, and therefore adhesive using heat such as solder cannot be used. In this regard, since the conductor 32 is disposed on the inner surface 31 of each of the through holes 30A and 30B of the circuit module 101, the antennas are connected to the power supply points K1 and K2 by inserting the conductive thread 102 into the through holes 30A and 30B. In other words, it becomes possible to connect the conductive thread-shaped antenna without adhesive using heat such as solder.

[0047] 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 to a range covering at least the edge 35 of the surface 21 of the circuit board 20 of the through holes 30A and 30B. More preferably, the conductor 32 extends beyond the edge 35 to the surface 21. This makes it easier for the conductive thread 102 threaded through the through holes 30A and 30B to come into contact with the conductor 32, making it easier to connect the antenna. Specifically, the conductive thread 102 comes into contact with the power supply points K1 and K2, and also comes into contact with the edges of the through holes 30A and 30B on the opposite side to the power supply points K1 and K2. In this way, contact at multiple points can be made more reliably electrically coupled.

[0048] More preferably, the region of the conductor 32 extending on the surface 21 of the circuit board 20 has a length in a specific direction longer than the length in other directions. The specific direction includes the direction in which the conductive thread 102 passing through the through holes 30A and 30B extends along the surface 21 of the circuit board 20.

[0049] As an example, the conductive thread 102 is fixed to the circuit module 101 as shown in Figures 2 and 3. That is, in Figures 2 and 3, the conductive thread 102 is wound around each of the through holes 30A and 30B in the same direction. At this time, the conductive thread 102 is inserted into the through hole 30A and extends along the front surface 21 of the circuit board 20 toward the outer periphery.

[0050] In the case of Figs. 2 and 3, the length of the conductor 32 in a direction from the through hole 30A toward the outer periphery (first direction) is longer than the length in another direction (second direction) different from the first direction. Specifically, the length L1 in the first direction is longer than the length L2 in the direction toward the center (L1>L2). Also, the length L1 in the first direction is longer than the length L3 in the direction perpendicular to the direction toward the center (L1>L3). This is the same for the conductor 32 around the through hole 30B. This makes it easier for the conductive thread 102 passed through the through holes 30A and 30B to come into contact with the conductor 32, making it easier to connect the antenna.

[0051] 2 and 3, the conductive thread 102 is set on the circuit module 101, so that the circuit module 101 can slide freely relative to the fabric C1 in the directions of arrows A and B within the range where the conductive thread 102 is sewn into the fabric C1. This enables gamma matching, which will be described later.

[0052] 2 and 3 is merely 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 through both of the through holes 30A and 30B. Preferably, the conductive thread 102 is set in a manner that allows the circuit module 101 to slide freely relative to the fabric C1. For example, it is not necessary to wind the conductive thread 102 around both of the through holes 30A and 30B, and it may be passed through only one of them, or through neither of them without winding it around.

[0053] That is, the conductive thread 102 may be inserted through both of the through holes 30A and 30B without being wound, and extended from each of the through holes 30A and 30B to either the front surface 21 of the circuit board 20 or the opposite surface (back surface) thereof. In this case, the region of the conductor 32 extending onto the front surface 21 of the circuit board 20 is preferably made longer in the direction in which the conductive thread 102 extends from the through holes 30A and 30B on the front surface 21 of the circuit board 20 than in other directions.

[0054] Specifically, a case in which the conductive thread 102 is extended from each of the through holes 30A and 30B to the back side as shown in Fig. 4 and a case in which the conductive thread 102 is extended to the front surface 21 side as shown in Fig. 5 will be described. In the case of Fig. 4, the conductive thread 102 extends toward the center on the front surface 21 of the circuit board 20, so that the length L12 extended toward the center of the conductor 32 is longer than the length L11 extended toward the periphery. In the case of Fig. 5, the conductive thread 102 extends toward the periphery on the front surface 21 of the circuit board 20, so that the length L212 extended toward the periphery of the conductor 32 is longer than the length L22 extended toward the center. This makes it easier for the conductive thread 102 passed through the through holes 30A and 30B to come into contact with the conductor 32, and the formation of the power supply point can be more reliably achieved.

[0055] 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 rectifier circuit 10 is supplied with electromagnetic waves received by a conductive thread 102 that functions as an antenna.

[0056] The rectifier 11 rectifies and converts the electromagnetic waves received by the conductive yarn 102 into a direct current and supplies the direct current to another circuit. The other circuit is, for example, a load circuit 40 including a load such as an LED (Light Emitting Diode) 41. This allows the load circuit 40 to consume power. In other words, the LED 41 can be turned on.

[0057] The circuit disposed 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 between the conductive thread 102 that functions as an antenna and the rectifier 11, and in the circuit module 101 according to the first embodiment, performs gamma matching.

[0058] 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 includes feeding points K1 and K2 formed on the conductor 32. The matching circuit 50 for gamma matching further includes a capacitor 51. The capacitor 51 may be a variable capacitor. The capacitor 51 is disposed on a feed line connected to the feeding point K1, and is connected to the first portion 102A.

[0059] The conductive yarn 102 is divided into a first portion 102A extending from a feed point K1, a second portion 102B extending from a feed point K2, and a third portion 102C between the feed points K1 and K2.

[0060] 7, a first feed line 52 is connected to a feed point K1, and a second feed line 53 is connected to a feed point K2. A capacitor 51 constituting a matching circuit 50 is provided on the first feed line 52.

[0061] By providing the capacitor 51 on the first feed line 52, the connection between the feed point K1 and the feed point K2 by the third portion 102C is shorted, and the first portion 102A extending from the feed point K1 functions as the first antenna element AE1, and the second portion 102B extending from the feed point K2 functions as the second antenna element AE2, becoming equivalent to the circuit shown in Fig. 1. In other words, a dipole antenna is realized by one conductive thread 102.

[0062] Gamma matching in the matching circuit 50 will be described with reference to Fig. 8. Referring to Fig. 8, as shown in Fig. 3, the circuit module 101 slides in the direction of arrow A and the direction of arrow B relative to the fabric C1, thereby changing the positions of the feeding points K1 and K2 on the conductive thread 102 functioning as a dipole antenna. This makes it possible to change the impedance of the dipole antenna. By positioning the feeding points K1 and K2 closer to the center of the conductive thread 102, the impedance of the antenna element can be made lower, and the impedance can be made higher closer to the ends. As a result, the impedance is matched with the impedance of the rectifier 11.

[0063] 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 total length L of the conductive thread 102 functioning as a dipole antenna, is λ / 2, which is approximately 6 cm. In this case, the length LB of the second portion 102B is set to half the total length L, that is, approximately 3 cm, and the feeding point K2 is set to approximately the center. From this state, the circuit module 101 is moved on the conductive thread 102 to match the impedance of the antenna with the impedance of the rectifier 11. This makes it possible to determine the position of the circuit module 101 relative to the conductive thread 102, that is, the length LA of the first portion 102A and the length LB of the second portion 102B. In other words, in the circuit device 100 according to the first embodiment, impedance matching can be easily performed by sliding the circuit module 101 relative to the fabric C1.

[0064] Curves E1 to E3 shown in FIG. 9 each show the results when gamma matching was performed using a fabric product C to which the circuit device 100 of the embodiment was attached on a substrate C1, with the frequency of the received electromagnetic waves set to 2.45 GHz.

[0065] 9, curves E1 to E3 are the results when the first to third conductive threads are used, respectively, and represent the VSWR (Voltage Standing Wave Ratio) for each electromagnetic wave frequency of the circuit device 100. The closer the VSWR is to 1, the more ideal it is, and all of the curves E1 to E3 have a VSWR approaching 1 at 2.45 GHz. Therefore, it was confirmed that in the circuit device 100 according to the embodiment, the impedance of the antenna and the impedance of the rectifier 11 were sufficiently matched by the above method.

[0066] As an example of a method for manufacturing the fabric product C, the flow shown in Fig. 10 can be considered. That is, referring to Fig. 10, the conductive thread 102 is passed through the through-hole 30 of the circuit module 101 with a needle or the like (step S1), and after passing through, it is sewn to the fabric C1 (step S2).

[0067] In steps S1 and S2, the circuit module 101 is sewn onto the fabric C1 so as to be freely slidable, as shown in Figures 3 to 5. In the example of Figure 2, for example, if sewing proceeds from the left side to the right side of the figure, the conductive thread 102 is passed from the attachment side of the circuit module 101 of the fabric C1 (hereinafter, the upper surface) to the lower surface, and then from the lower surface to the upper surface, and the conductive thread 102 is passed through the through hole 30A from the lower surface side toward the front surface 21. The conductive thread 102 coming out from the front surface 21 side of the through hole 30A is wound around the outer periphery of the circuit module 101 and passed again to the lower surface of the fabric C1.

[0068] Next, the conductive thread 102 is passed from the bottom surface to the top surface of the fabric C1, and then passed from the outer periphery of the circuit module 101 to the surface 21 of the through hole 30B. The conductive thread 102 that comes out from the bottom surface through the through hole 30B is passed from the top surface of the fabric C1 to the bottom surface, and then passed back to the top surface.

[0069] Gamma matching is performed by sliding the sewn circuit module 101 relative to the fabric C1 in the direction of arrow A or the direction of arrow B (step S3). Depending on the result, the position of the circuit module 101 on the fabric C1 is determined (step S4).

[0070] In addition, when manufacturing multiple fabric products C, such as mass-producing them, it is not necessary to determine the position by performing gamma matching every time. For example, the position may be determined by performing gamma matching on a prototype during the design process, and then in the subsequent mass production process, the circuit module 101 may be attached to the determined position.

[0071] Examples of the fabric product C manufactured in this manner include clothing accessories such as the bracelet shown in Fig. 11 and clothes such as socks shown in Fig. 12. For example, LEDs can be turned on by wirelessly supplying power to such fabric products C. This makes it possible to provide fabric products C with excellent fashionability and design. In addition, since the fabric products are resistant to sweat and water, they can be applied to fabric products that are expected to get wet, that may come into contact with sweat, that require washing, and the like.

[0072] [Second embodiment]

[0073] 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 two through holes 30A and 30B provided in the circuit board 20. Specifically, as shown in FIG. 13 and FIG. 14, the conductive threads 102D and 102E may be inserted into the through holes 30A and 30B, respectively, and further the fabric C1 may be sewn and tied together. 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, the circuit is equivalent to the circuit in FIG. 1.

[0074] 14, the conductors 32 provided in the through holes 30A and 30B are preferably connected by a conductive wire 54. As an example, the conductive wire 54 is provided on the back surface side of the circuit board 20.

[0075] 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, even in a usage in which different conductive threads 102D, 102E are inserted into the two through holes 30A, 30B, respectively, as shown in Fig. 13 and Fig. 14, gamma matching can be performed in the matching circuit 50 in the same manner as in the method described in Fig. 8.

[0076] [Third embodiment]

[0077] As another example of the circuit device 100, a fixing hole may be further formed in the circuit board 20. The fixing hole is used to maintain the position of the circuit module 101 relative to the fabric C1 when the circuit module 101 is attached to the fabric C1 by sewing with 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 the through holes 30A and 30B. This can facilitate manufacturing.

[0078] Preferably, a plurality of fixing holes are formed. As an example, two through holes, fixing holes 61A and 61B, are formed in the circuit board 20 of the circuit module 101 according to the third embodiment, as shown in Fig. 15 and Fig. 16. Although the through holes 30A and 30B have conductors 32 formed on their inner surfaces 31, neither of the fixing holes 61A and 61B has conductors formed on their inner surfaces 62.

[0079] The absence of a conductor on the inner surface 62 of each of the fixing holes 61A, 61B means, 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, 61B. As another example, an insulator may be formed on or near the inner surface 62 of the fixing holes 61A, 61B.

[0080] Since no conductor is formed on the inner surface 62 of each of the fixing holes 61A, 61B, the fixing holes 61A, 61B do not form a power supply point on or near the inner surface 62 even if the fixing holes 61A, 61B are in contact with the conductive thread 102. As a result, the fixing holes 61A, 61B can be used to hold the position of the circuit module 101 without serving as a power supply point.

[0081] The circuit module 101 according to the third embodiment is inserted by a conductive thread 102 inserted into at least one of the through holes 30A and 30B. Preferably, the end of the conductive thread 102 inserted into the through hole 30A is inserted into a fixing hole 61A formed near the through hole 30A, and the end of the conductive thread 102 inserted into the through hole 30B is inserted into a fixing hole 61B formed near the through hole 30B. In other words, one conductive thread 102 is inserted successively through the fixing hole 61A, the through hole 30A, the through hole 30B, and the fixing hole 61B in this order.

[0082] At that time, the circuit module 101 is sewn to the fabric C1 by the conductive thread 102. Referring to Fig. 16, for example, if sewing proceeds from the left side to the right side of the figure, the conductive thread 102 is passed from the lower surface of the fabric C1 to the upper surface, passed through the fixing hole 61A, and passed toward the front surface 21 of the circuit module 101. Next, the conductive thread 102 coming out of the lower surface of the fabric C1 from the front surface 21 of the circuit module 101 through the through hole 30A is passed from the lower surface to the upper surface of the fabric C1, and passed through the through hole 30B toward the front surface 21. Next, the conductive thread 102 is passed from the front surface 21 of the circuit module 101 through the fixing hole 61B and out of the lower surface of the fabric C1.

[0083] By attaching the circuit module 101 according to the third embodiment to the fabric C1 in this manner, the circuit module 101 can slide in the directions of the arrows A and B relative to the fabric C1, and the position of the circuit module 101 relative to the fabric C1 after movement can be easily maintained. For this reason, the inner diameters of the fixing holes 61A and 61B may be larger than the through holes 30A and 30B. This makes it easier for the circuit module 101 to slide. Alternatively, the inner diameters of the fixing holes 61A and 61B may be smaller than the through holes 30A and 30B. This makes it easier for the circuit module 101 to be fixed in position relative to the fabric C1 after movement.

[0084] The fixing holes 61A, 61B may be arranged on the same straight line as the through holes 30A and 30B in the circuit board 20. Specifically, in the example of FIG. 15, the fixing holes 61A, 61B have their respective centers P3, P4 arranged on the imaginary straight line SL on which the centers P1, P2 of the through holes 30A and 30B are arranged. The fixing holes 61A, 61B, the through holes 30A, and the through holes 30B do not need to have their centers P1, P2, P3, and P4 arranged on the imaginary straight line SL, and it is sufficient that any of the holes is located on the imaginary straight line SL. This makes it easier to slide the circuit module 101. Alternatively, the fixing holes 61A, 61B may be arranged at a position deviated from the straight line on which the through holes 30A and 30B are arranged. This makes it easier to fix the position of the circuit module 101 with respect to the fabric C1 after movement.

[0085] Also, preferably, both of the fixing holes 61A and 61B are disposed on the outer periphery side of the circuit module 101 relative to the through holes 30A and 30B. That is, the fixing hole 61A is formed on the side of the through hole 30A farther than the through hole 30B, and the fixing hole 61B is formed on the side of the through hole 30B farther than the through hole 30A. This allows the interval between the through holes 30A and 30B to be shorter than when the fixing holes 61A and 61B are disposed on the inner periphery side of the circuit module 101 relative to the through holes 30A and 30B. That is, the interval between the power supply points K1 and K2 can be shortened. This makes it possible to facilitate the above-mentioned gamma matching.

[0086] <3. Notes> The present invention is not limited to the above-described embodiment, and various modifications are possible. [Explanation of symbols]

[0087] 10: Rectifier circuit 11: Rectifier 20: Circuit board 21 :Surface 22: Sealing body 30:Through hole 30A: Through hole 30B: Through hole 31: Inside 32: Conductor 33:Power line 35: Edge 40: Load circuit 41: LED 50: Matching circuit 51: Variable capacitor 52: 1st feeder line 53:Second feeder line 54: Conductive wire 61A: Fixing hole 61B: Fixing hole 62: Inside 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 products C1: Fabric K1: Power supply point K2: Power supply 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

1. A circuit board; a circuit disposed on the circuit board and connected to an antenna; The circuit board is provided with one or more through holes through which the conductive thread serving as the antenna is inserted, The circuit has a conductor on the inner surface of the through hole that serves as a power supply point for the conductive thread that serves as the antenna. Circuit module.

2. The point where the conductive thread inserted into the through hole comes into contact with the conductor forms the power supply point. The circuit module according to claim 1 .

3. The conductor extends from the inner surface to the surface of the circuit board to an extent that covers at least an edge of the through hole on the surface of the circuit board.

3. The circuit module according to claim 1 or 2.

4. a length of the region of the conductor extending on the surface of the circuit board in a first direction is longer than a length of the region in a second direction different from the first direction; The first direction includes a direction in which the conductive thread inserted into the through hole extends along a surface of the circuit board. The circuit module according to any one of claims 1 to 3.

5. The circuit includes a rectifier that rectifies the electromagnetic waves received by the conductive thread inserted into the through hole as the antenna into a direct current. The circuit module according to any one of claims 1 to 4.

6. the plurality of through holes includes a first through hole and a second through hole, The circuit includes a gamma matching circuit connected to the conductor disposed in the first through hole and the conductor disposed in the second through hole. The circuit module according to claim 5 .

7. The circuit board further includes one or more fixing holes through which the conductive thread is inserted. The circuit module according to claim 6 .

8. The conductor is not disposed in the fixing hole. The circuit module according to claim 7.

9. The fixing holes are disposed closer to the outer periphery of the circuit board than any of the plurality of through holes.

9. The circuit module according to claim 7 or 8.

10. The plurality of fixing holes are arranged on the circuit board so as to sandwich the first through hole and the second through hole therebetween. The circuit module according to any one of claims 7 to 9.

11. The fixing hole is disposed on the same straight line as the plurality of through holes in the circuit board. The circuit module according to any one of claims 7 to 10.

12. The circuit comprises: a first power supply line connected to a first power supply point formed on the conductor disposed in the first through hole; a second power supply line connected to a second power supply point formed on the conductor disposed in the second through hole, A capacitor constituting the gamma matching circuit is provided on the first power supply line. The circuit module according to claim 6 .

13. The first feeding point and the second feeding point are connected by a conductive line. The circuit module of claim 12.

14. The conductor is formed of a highly corrosion-resistant material; The circuit board further includes a sealant that seals the circuit on the surface of the circuit board. The circuit module according to any one of claims 1 to 6, 12 and 13.

15. a circuit module having a circuit board and a circuit to which an antenna is connected, the circuit module being disposed on the circuit board; A conductive thread serving as an antenna; The circuit board is provided with one or more through holes through which the conductive thread is inserted, The circuit has a conductor on the inner surface of the through hole that serves as a power supply point for the conductive thread that serves as the antenna. circuit device.

16. the plurality of through holes includes a first through hole and a second through hole, the conductive thread is inserted through both the first through hole and the second through hole and attached to the circuit module; The conductive thread receives electromagnetic waves as a dipole antenna having a first element that extends from the first through hole and a second element that extends from the second through hole.

16. A circuit arrangement according to claim 15.

17. The circuit module is slidably attached to the conductive thread.

17. A circuit arrangement according to claim 16.

18. the circuit includes a gamma matching circuit connected to the conductor disposed on the inner surface of the first through hole and the conductor disposed on the inner surface of the second through hole; The circuit module is configured to be slid to a position where gamma matching is achieved, and a position relative to the conductive thread is determined.

18. A circuit arrangement according to claim 17.

19. The conductive thread is wound around the first through hole and the second through hole in the same direction. The circuit device according to any one of claims 16 to 18.

20. a circuit module having a circuit board and a circuit to which an antenna is connected, the circuit module being disposed on the circuit board; A conductive thread that acts as an antenna, a fabric to which the circuit module is attached by being sewn with the conductive thread; The circuit board is provided with one or more through holes through which the conductive thread is inserted, The circuit has a conductor on an inner surface of the through hole, the conductor being a power supply point to the conductive thread, The conductive thread is inserted into the through hole so that a point where the conductive thread contacts the conductor serves as the power supply point; The conductive thread is further sewn to the fabric. cloth products.

21. A method for manufacturing a fabric product in which a circuit module is sewn into fabric, comprising the steps of: the circuit module includes a circuit board and a circuit disposed on the circuit board and connected to an antenna; The circuit board is provided with one or more through holes through which conductive threads are inserted, The circuit has a conductor on an inner surface of the through hole that serves as a power supply point to the conductive thread that serves as the antenna, The conductive thread is inserted into the through hole, and sewing the conductive thread inserted into the through hole to a fabric. A method for manufacturing fabric products.

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