Wiring structure

Abstract

To provide a wiring structure capable of stably maintaining electrical connection between a conducting wire and a printed wiring board.SOLUTION: A wiring structure 100 includes a printed wiring board 2, a support pin 3, and a conductor 4. The printed wiring board 2 includes a land portion 25. The support pin 3 is fixed to the printed wiring board 2. The conductor 4 includes a winding portion 41 and an extension portion 42. The winding portion 41 is wound around the support pin 3. The extension portion 42 extends from the support pin 3 to the land portion 25. The extension portion 42 is soldered to the land portion 25.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a wiring structure. [Background technology]

[0002] In devices having conductors such as motors, the conductors are soldered to lands on a printed wiring board. For example, Patent Document 1 discloses a wiring structure in which a terminal pin around which a conductor is wound is soldered to a printed wiring board. In this wiring structure, the conductor is electrically connected to the printed wiring board via the terminal pin. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-97236 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the wiring structure described above, if the printed wiring board or the like is subjected to impact or vibration, cracks or the like may occur at the joint between the terminal pin and the printed wiring board, and the electrical connection between the conductor and the printed wiring board may be impaired.

[0005] An object of the present invention is to provide a wiring structure capable of stably maintaining electrical connection between a conductor and a printed wiring board. [Means for solving the problem]

[0006] A wiring structure according to one aspect of the present invention includes a printed wiring board, a support pin, and a conductor. The printed wiring board has a land portion. The support pin is fixed to the printed wiring board. The conductor has a winding portion and an extending portion. The winding portion is wound around the support pin. The extending portion extends from the support pin to the land portion. The extending portion is soldered to the land portion.

[0007] According to this configuration, the conductor is supported by the support pin at the winding portion. The conductor has an extension between the winding portion and the portion soldered to the land. That is, the conductor is soldered to the land at a location away from the support pin. Therefore, even if the printed wiring board is subjected to an impact or vibration, it is possible to suppress the occurrence of cracks in the soldered portion between the conductor and the land. As a result, the electrical connection between the conductor and the printed wiring board can be stably maintained.

[0008] Preferably, the printed wiring board is annular. The conductive wire is soldered to the printed wiring board at a position radially inward from the support pin.

[0009] Preferably, the winding portion is movable in the axial direction of the support pin relative to the support pin. That is, the winding portion is not fixed to the support pin. With this configuration, when an impact or vibration is applied to the printed wiring board, the winding portion can move in the axial direction. Therefore, it is possible to more effectively prevent cracks from occurring in the soldered portion.

[0010] Preferably, the extension portion extends in a loose state from the support pin to the land portion. With this configuration, the occurrence of cracks in the soldered portion can be more effectively suppressed.

[0011] Preferably, the support pin is made of metal.

[0012] Preferably, the support pin is made of resin.

[0013] Preferably, the printed wiring board has a first surface and a second surface. The land portion is disposed on the first surface. The printed wiring board has a cutout portion. The conductive wire extends from the second surface side to the first surface side of the printed wiring board through the cutout portion.

[0014] Preferably, the notch is hook-shaped. With this configuration, the space inside the printed wiring board can be effectively utilized.

[0015] Preferably, the printed wiring board has a through hole, and the support pin passes through the through hole. Effect of the Invention

[0016] According to the present invention, the electrical connection between the conductive wire and the printed wiring board can be stably maintained. [Brief description of the drawings]

[0017] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. 11 is a plan view showing a modified example of the cutout portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] The wiring structure according to this embodiment will be described below with reference to the drawings. In the following description, the circumferential direction refers to the circumferential direction of a circle centered on the rotation shaft of the motor 10, and the radial direction refers to the radial direction of a circle centered on the rotation shaft of the motor 10.

[0019] 1, the wiring structure 100 includes a printed wiring board 2, a support pin 3, and a conductive wire 4. The wiring structure 100 can be used as a wiring structure for a motor 10.

[0020] As shown in Fig. 2, the motor 10 has a rotor (not shown), a stator 101, and a printed wiring board 2. The motor 10 is an inner rotor type. The motor 10 can be attached to a transport device such as a hand lift, a dolly, or an unmanned transport vehicle. Note that the conductor wires 4 and solder are omitted from Fig. 2.

[0021] As shown in FIG. 3, the stator 101 has a stator core 102, an insulator 103, and a plurality of coils 104. The stator core 102 can be formed by stacking a plurality of electromagnetic steel plates. The insulator 103 is attached to the stator core 102. The insulator 103 is made of an insulating material such as resin. The insulator 103 is attached to the stator core 102 so as to cover the stator core 102. In particular, the insulator 103 covers the teeth portion of the stator core 102.

[0022] [Printed wiring board] As shown in Fig. 2, the printed wiring board 2 is annular. As shown in Fig. 3, the printed wiring board 2 has a first surface 21 and a second surface 22. The first surface 21 and the second surface 22 face in opposite directions. Conductor wiring is formed on the first surface 21. The second surface 22 faces the stator 101. The printed wiring board 2 is disposed with a gap between it and the stator 101.

[0023] As shown in Fig. 2, the printed wiring board 2 has a plurality of cutout portions 23 and a plurality of through holes 24. The cutout portions 23 are arranged at intervals from one another in the circumferential direction. The cutout portions 23 extend inward from the outer edge of the printed wiring board 2. In detail, the cutout portions 23 extend radially inward from the outer circumferential edge of the printed wiring board 2. The cutout portions 23 extend in the radial direction. The tips of the cutout portions 23 are located radially inward from the through holes 24.

[0024] The through holes 24 penetrate the printed wiring board 2 in the thickness direction. The through holes 24 are arranged at intervals from one another in the circumferential direction.

[0025] The printed wiring board 2 has a plurality of land portions 25. The land portions 25 are arranged on the first surface 21. The land portions 25 are arranged at intervals from one another in the circumferential direction. The land portions 25 are arranged radially inward of the through holes 24.

[0026] The land portion 25 is disposed so as to be adjacent to the cutout portion 23. The land portion 25 is adjacent to the cutout portion 23 in the direction in which the cutout portion 23 extends. In this embodiment, the land portion 25 is adjacent to the cutout portion 23 in the radial direction. Note that the land portion 25 may be in contact with the cutout portion 23, or may be disposed at a distance from the cutout portion 23.

[0027] A Hall IC is attached to the inner peripheral edge of the printed wiring board 2. The Hall IC is disposed on the second surface 22 side of the printed wiring board 2, and a tip portion 26 of a terminal of the Hall IC penetrates the printed wiring board 2 and protrudes to the first surface 21 side. The tip portion 26 of the terminal of the Hall IC is soldered on the first surface.

[0028] [Support pin] As shown in FIG. 3, the support pin 3 is disposed on the second surface 22 side of the printed wiring board 2 (the lower side in FIG. 3). The support pin 3 extends from the insulator 103 toward the printed wiring board 2. The support pin 3 is made of metal. The support pin 3 is formed integrally with the insulator 103. The support pin 3 is formed of a separate member from the insulator 103. The support pin 3 may be made of the same material as the insulator 103. In this case, the support pin 3 may be made of resin.

[0029] The support pin 3 is fixed to the printed wiring board 2. The support pin 3 passes through a through hole 24 of the printed wiring board 2, and its tip portion protrudes to a first surface (upper side in FIG. 3) of the printed wiring board 2. The support pin 3 may be fitted into the through hole 24.

[0030] 1 and 4, the support pin 3 is soldered to the printed wiring board 2 at a tip portion protruding from the first surface 21 of the printed wiring board 2. The portion where the support pin 3 is soldered to the printed wiring board 2 is referred to as a first soldered portion 31. Note that the support pin 3 does not have to be soldered when it is fitted into the through hole 24. Also, the support pin 3 may be fixed to the printed wiring board 2 by an adhesive or the like.

[0031] [Conductor] The conducting wire 4 constitutes the coil 104. The conducting wire 4 is wound around the teeth portion of the stator core 102 to constitute the coil 104.

[0032] Conductive wire 4 extends from coil 104. Conductive wire 4 extends from second surface 22 of printed wiring board 2, through cutout portion 23, to first surface 21 of printed wiring board 2. In other words, the tip of conductive wire 4 is disposed on first surface 21 of printed wiring board 2. Conductive wire 4 has a winding portion 41 and an extending portion 42.

[0033] As shown in FIG. 5, the conductor 4 is wound around the support pin 3. That is, the conductor 4 has a winding portion 41. The winding portion 41 is the portion of the conductor 4 that is wound around the support pin 3. The conductor 4 is supported by the support pin 3 by this winding portion 41. The winding portion 41 of the conductor 4 that is wound around the support pin 3 is movable relative to the support pin 3 in the direction in which the support pin 3 extends (axial direction). That is, the conductor 4 is not soldered to the support pin 3 and is not fixed to the support pin 3.

[0034] 1, the extension portion 42 extends from the support pin 3 to the land portion 25. The extension portion 42 may extend from the support pin 3 to the land portion 25 in a slack state or in a taut state.

[0035] The extending portion 42 extends at an angle from the winding portion 41 to the cutout portion 23. The extending portion 42 extends in a curved manner, not in a straight line, between the winding portion 41 and the cutout portion 23. The extending portion 42 may extend in a straight line without slack between the winding portion 41 and the cutout portion 23.

[0036] 4, the conductive wire 4 is soldered to the printed wiring board 2. In detail, the tip of the extension portion 42 is soldered to the land portion 25 of the printed wiring board 2. The portion formed by soldering the conductive wire 4 to the land portion 25 is referred to as a second soldering portion 43.

[0037] As shown in FIG. 1, the second soldering portion 43 is formed at a location away from the support pin 3. In detail, the second soldering portion 43 is formed at a location separate from the first soldering portion 31. The second soldering portion 43 is disposed at a distance from the first soldering portion 31 in the circumferential direction. The conductive wire 4 is soldered to the printed wiring board 2 radially inward from the support pin 3. In other words, the second soldering portion 43 is located radially inward from the first soldering portion 31.

[0038] [Variations] Although the embodiments of the present invention have been described above, the present invention is not limited to these, and various modifications are possible without departing from the spirit of the present invention.

[0039] Variation 1 In the above embodiment, the notch portion 23 extends linearly, but the shape of the notch portion 23 is not limited to this. For example, as shown in Fig. 6, the notch portion 23 may be hook-shaped. In detail, the notch portion 23 has a first notch portion 231 and a second notch portion 232.

[0040] The first cutout portion 231 extends inward from the outer edge of the printed wiring board 2. More specifically, the first cutout portion 231 extends in the radial direction. The second cutout portion 232 extends in a direction intersecting with the first cutout portion 231. More specifically, the second cutout portion 232 extends in the circumferential direction.

[0041] The land portion 25 is adjacent to the tip of the second cutout portion 232. In detail, the land portion 25 is The first cutout portion 231 is adjacent to the second cutout portion 232 in the circumferential direction. The conductive wire 4 is received in the second cutout portion 232 via the first cutout portion 231.

[0042] Variation 2 In the above embodiment, the conductor 4 is not soldered to the support pin 3 and is not fixed to the support pin 3, but the configuration of the conductor 4 is not limited to this. That is, the conductor 4 may be soldered to the support pin 3. Also, the conductor 4 may be fixed to the support pin 3 by an adhesive or the like. [Explanation of symbols]

[0043] 2: Printed wiring board 21: 1st page 22:Second side 23: Notch 24:Through hole 25: Land Section 3: Support pin 4: Conductor 42: Winding section 100: Wiring structure

Claims

1. A printed wiring board having a land portion; A support pin fixed to the printed wiring board; a conductive wire having a winding portion wound around the support pin and an extension portion extending from the support pin to the land portion and soldered to the land portion; Equipped with the printed wiring board has a first surface and a second surface; The land portion is disposed on the first surface, The printed wiring board has a notch portion, the extending portion extends from the second surface side to the first surface side of the printed wiring board through the cutout portion, The notch is disposed at a distance from the support pin. Wiring structure.

2. the printed wiring board is annular, The conductive wire is soldered to the printed wiring board radially inward of the support pin. The wiring structure according to claim 1 .

3. The winding portion is movable in an axial direction of the support pin relative to the support pin. The wiring structure according to claim 1 or 2.

4. The extension portion extends in a loose state from the support pin to the land portion. The wiring structure according to claim 1 .

5. The support pin is made of metal. The wiring structure according to claim 1 .

6. The support pin is made of resin. The wiring structure according to claim 1 .

7. The cutout portion is hook-shaped. The wiring structure according to claim 1 .

8. The printed wiring board has a through hole, The support pin passes through the through hole. The wiring structure according to claim 1 .

9. The extension portion extends at an incline from the winding portion to the notch portion. The wiring structure according to claim 1 .

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