WIRING BOARD, ROTATING MACHINE, AND ROTATING DEVICE

A wiring board includes a base including a hole part, an inner circumferential end part forming the hole part, and a wiring line including a part surrounding the hole part. The inner circumferential end part of the base is arranged at an inner side than the part surrounding the hole part. The inner circumferential end part of the base is deformed in a direction passing through the hole part.

TECHNICAL FIELD

The present invention relates to a wiring board, a rotating machine, and a rotating device.

BACKGROUND ART

Conventionally, there has been a rotating device (motor actuator) including a motor, an output gear, a sensor detecting a rotational position (rotation angle) of the output gear, and electronic components such as an integrated circuit (IC) for a local interconnect network (LIN) for controlling an operation of the motor. The rotating device can, for example, drive a plurality of switching doors (louvers) provided at the middle of an air passage of an air conditioning system for a vehicle such as a DC heating ventilation and air conditioning (HVAC).

CITATION LIST

Patent Literature

Patent Document 1: JP 06-252525 A

Patent Document 2: JP 2012-134215 A

Patent Document 3: JP S58-142958 U

Patent Document 4: JP 2007-299610 A

SUMMARY OF INVENTION

Technical Problem

In the above technique, for example, a technique is known to electrically connect the sensor and electronic components to connection terminals connected to external devices using a printed circuit board (PCB) or the like having a multi-layer power distribution configuration. In this case, for example, a columnar connection terminal is electrically connected to the PCB by being inserted into a hole part provided at a base film of the PCB and soldered.

However, when the columnar connection terminal is inserted into the hole part of the PCB and soldered, the solder may leak out of the hole part and flow between the columnar terminal and a housing of the rotating device. In this case, the columnar terminal comes off from the housing, making the fixation of the terminal to the housing unstable.

In one aspect, an object is to provide a wiring board, a rotating machine, and a rotating device capable of suppressing solder leakage from a hole part.

Solution to Problem

In one aspect, a wiring board includes a base including a hole part and an inner circumferential end part forming the hole part, and a wiring line including a part surrounding the hole part. The inner circumferential end part of the base is arranged at an inner side than the part surrounding the hole part. The inner circumferential end part of the base is deformed in a direction passing through the hole part.

According to the one aspect, solder leakage from the hole part can be suppressed.

DESCRIPTION OF EMBODIMENTS

A wiring board, a rotating machine, and a rotating device disclosed in the present application will be described below with reference to the drawings. Note that in the drawings, the dimensional relationship of elements and the ratio of the elements may differ from reality. The dimensional relationship and the ratio may be different among the drawings. For the sake of clarity, a three-dimensional Cartesian coordinate system having an axis direction of an output shaft51described later as a Z-axis positive direction (rotation axis direction) may be illustrated in the drawings.

First Embodiment

FIG.1is a plan view of a rotating device according to a first embodiment,FIG.2is a side view of the rotating device according to the first embodiment, andFIG.3is a bottom view of the rotating device according to the first embodiment.FIG.4is a plan view of the rotating device according to the first embodiment when a first housing is removed.FIG.20is a schematic explanatory diagram illustrating an air conditioning system including a rotating device according to an embodiment.

A rotating device1according to the embodiment can be suitably used as, for example, an actuator used in an air conditioning system for a vehicle and can control the rotational operation of a louver for controlling wind volume or the like.

The rotating device1according to the embodiment is used, for example, in an air conditioning system100for a vehicle as illustrated inFIG.20and can control the rotational operation of a louver104for controlling wind volume or the like. The air conditioning system100for the vehicle includes a blower fan101, an evaporator102for cooling air fed from the blower fan101, and a heater103disposed downstream of the evaporator102. The louver104controlling a supply amount of air flowing from the evaporator102side to the heater103side is disposed between the evaporator102and the heater103, and a drive shaft104aof the louver104is rotated by the rotating device1.

As illustrated inFIGS.1to4, the rotating device1includes a housing2accommodating a power transmission mechanism inside. Here, specifically, the power transmission mechanism includes a motor3, a plurality of gears (hereinafter referred to as a gear group)6for transmitting power from the motor3, and a sensor7for detecting a rotation angle of an output gear5included in the gear group6, illustrated inFIG.4. Note that the sensor7may detect the number of rotations rather than the rotation angle of the output gear5or may detect both the rotation angle and the number of rotations.

The gear group6of the power transmission mechanism includes a worm gear32mounted at a rotation shaft31of the motor3, a first transmission gear61, a second transmission gear62, and the output gear5. In other words, as illustrated inFIG.4, rotation of the worm gear32is transmitted to a helical gear611of the first transmission gear61and also transmitted to a helical gear621of the second transmission gear62via a small diameter gear612provided coaxially with the helical gear611and having a relatively smaller diameter than the helical gear611. Rotation of the second transmission gear62is then transmitted to the output gear5via, for example, a small diameter gear (not illustrated) provided coaxially with the helical gear621and having a relatively smaller diameter than the helical gear621. The output shaft51(FIG.3) is connected to the output gear5. For example, an external shaft such as the drive shaft104aof the louver104of the air conditioning system100described above is engaged with the output gear5. Accordingly, the rotational operation of the louver104can be controlled by rotating the output gear5, and thus the wind volume or the like of the air conditioning system100can be adjusted (seeFIG.20).

As described above, the rotation of the motor3is decelerated at a predetermined deceleration rate and output from the output shaft51to the outside. Then, the rotation angle of the output gear5is detected by the sensor7. Information of the rotation angle of the output gear5detected by the sensor7is transmitted to the outside via five connection terminals4illustrated inFIGS.2and4. When each of the plurality of connection terminals4are represented in a distinguished manner, each of the plurality of connection terminals4may be referred to as connection terminals4ato4e.The connection terminal4is an example of a columnar conductive member.

Note that as the sensor7according to the present embodiment, for example, a rotary resistive position sensor can be used to detect a change in resistance caused by displacement of a contact position of a brush with respect to a conductive part in the circumferential direction, with a sensor board and the conductive brush. However, the configuration of the sensor7is not necessarily limited to the configuration of the present embodiment. In the present embodiment, a DC motor is employed as the motor3, but a brushless motor or a stepping motor may be employed. In a case where a brushless motor or a stepping motor is employed, the rotating device1may not require the sensor7.

As illustrated inFIGS.1to3, the housing2includes a first housing21and a second housing22opposing each other. In other words, the housing2is formed by connecting the first housing21(FIG.1) and the second housing22(FIG.3). Note that, when describing the vertical positional relationship, a state where the first housing21of the rotating device1is positioned relatively at an upper side (Z-axis positive direction side) and the second housing22is positioned relatively at a lower side (Z-axis negative direction side) is used as a reference.

As illustrated inFIGS.1and2, the first housing21includes a first surface part210serving as a top surface part of the housing2, and a first side wall part211provided at an outer peripheral part of the first surface part210. On the other hand, as illustrated inFIGS.2and3, the second housing22includes a second surface part220serving as a bottom surface part of the housing2and a second side wall part221provided at an outer peripheral part of the second surface part220. Note that the housing2is formed of a resin material such as polypropylene, polyethylene terephthalate, or ABS.

As illustrated inFIGS.1and2, in the first housing21, a plurality of engagement parts212extending toward the second housing22side are integrally formed at an outer peripheral part of the first side wall part211. On the other hand, as illustrated inFIGS.1and4, in the second housing22, a plurality of projections (hereinafter, referred to as “engagement projections”)222corresponding respectively to the plurality of engagement parts212of the first housing21are integrally formed at the second side wall part221. The plurality of engagement projections222are engaged with the plurality of engagement parts212.

As described above, the housing2is formed by abutting the first housing21and the second housing22against each other (seeFIG.2). In other words, by engaging the engagement projections222of the second housing22with the engagement parts212of the first housing21, the first housing21and the second housing22are integrated, and the housing2accommodating the power transmission mechanism including the motor3, the gear group6, and the like described above is formed.

Note that, in the present embodiment, although the engagement parts212are provided at the first housing21and the engagement projections222are provided at the second housing22, the engagement parts212may be provided at the second housing22and the engagement projections222may be provided at the first housing21.

In addition, as illustrated inFIGS.1to3, tabs93(hereinafter, referred to as attachment tabs) each protruding outward are formed at both end parts of one sides of the first housing21and the second housing22. The attachment tabs93are provided with coupling holes94, and fasteners (not illustrated) as predetermined fixing members are inserted through the coupling holes94. The joined first housing21and the second housing22are securely coupled together with the predetermined fasteners through four coupling holes94to form the integrated housing2.

In the configuration of the housing2described above, in the present embodiment, the projected parts28are provided at corner parts of the first side wall part211forming the outer peripheral part of the first housing21, and second through-holes282are provided at corner parts of the second housing22. In other words, in the first housing21, the cylindrical projected parts28including first through-holes281are formed to protrude from the first surface part210. Fasteners (not illustrated) such as bolts or screws can be inserted through the first through-holes281. The second housing22is provided with the second through-holes282, and the projected parts28are fitted into the second through-holes282.

A plurality of projected parts28are provided, and a plurality of second through-holes282are also provided accordingly. The plurality of projected parts28are provided at a plurality (four) of corner parts of the first housing21, respectively, and the plurality of second through-holes282are also provided at a plurality (four) of corner parts of the second housing22, respectively. In the present embodiment, the first surface part210of the first housing21and the second surface part220of the second housing22have a substantially rectangular shape in plan view, and the projected parts28and the second through-holes282are provided at the four corner parts, respectively.

As illustrated inFIG.3, in the second housing22, the second through-holes282are formed at portions corresponding to the four corner parts of the second side wall part221. The attachment tabs93are provided at the outside of the four corner parts of the second side wall part221.

As illustrated inFIGS.1to3, projected parts219and229corresponding to each other are formed at the first housing21and the second housing22, respectively. In the present embodiment, the projected parts219and229protrude in an extending direction of the connection terminals4. The projected parts219and229are bonded together to form a connector part200(FIG.2). As illustrated inFIG.2, the plurality of (five, for example) connection terminals4are held at the connector part200. Note that the projected part229is an example of a part of the housing.

As illustrated inFIG.4, the connection terminals4are, for example, columnar conductive members provided with flanges41. The plurality of connection terminals4are disposed, for example, at the projected part229of the second housing22. At this time, as will be described later, the connection terminals4are disposed such that, for example, the flanges41fit into a groove part228formed at a holding part225provided at the projected part229of the second housing22. As will be described later, the connection terminals4are pressed by first projection parts216ato216eand second projection parts217ato217eformed at the pressing part215provided at the projected part219of the first housing21.

Further, as illustrated inFIG.4, the rotating device1according to the present embodiment includes a flexible wiring board8serving as a substrate for electrically connecting the connection terminals4to the motor3and the sensor7. Via the wiring board8and the connection terminals4, an input/output signal for driving the motor3is obtained from the outside and a signal corresponding to the rotation angle of the output gear5from the sensor7is output to the outside. Here, the wording “electrically connecting” means a concept including a case of directly connecting two members and a case of connecting two members via another member.

The wiring board8is, for example, a so-called FPC (Flexible Printed Circuit) formed of a flexible film. Generally, an FPC is composed of a base film (base), a wiring line, and a coverlay. In the following, the description will be given assuming that the coverlay is not illustrated.

The flexible wiring board8has a structure, and in the structure, an adhesive layer is formed at a base film (resin substrate) having a thickness of, for example, from approximately 12 μm to approximately 50 μm, and a conductor having a thickness of, for example, from approximately 12 μm to approximately 50 μm is printed or bonded on the adhesive layer. The base film is formed of, for example, an insulating resin material such as polyimide or polyester. The conductor is formed of a metal material such as copper. Note that the adhesive layer is formed of an epoxy-based resin or an acrylic resin. The wiring board8is a flexible board, and the flexible board can be bent and be restored to a shape before bending even when bent at an angle of 90 degrees or more. Note that the conductor is an example of a wiring line.

The wiring board8includes three major planar parts81,82, and83, as illustrated inFIG.4. Specifically, provided are the first planar part81connected to the connection terminals4and the sensor7, the third planar part83at the side connected to terminals33of the motor3, and the second planar part82connecting the first planar part81and the third planar part83.

FIG.5is a perspective view of a wiring board according to the first embodiment.FIGS.6and7are perspective views of the wiring board mounted at the rotating device according to the first embodiment.FIG.8is a cross-sectional view of the wiring board mounted at the rotating device according to the first embodiment. Note that inFIG.5, the second planar part82and the third planar part83are not illustrated.

The first planar part81includes a base813and wiring lines84. The wiring lines84are formed at a first surface811side of the first planar part81. Note that as illustrated inFIGS.5and8, a reinforcing member90such as a support plate may be provided as a member different from the wiring board8at a second surface812side of the first planar part81of the wiring board8. Note that the reinforcing member90is an example of a member different from the wiring board.

A plurality of hole parts H1are formed at the base813. One ends49of the connection terminals4are inserted through the plurality of hole parts H1. By inserting the connection terminals4through these hole parts H1to perform soldering, a secure electrical connection can be achieved. That is, the connection terminals4are electrically connected to the wiring board8by solder S. The hole parts H1of the wiring board8are formed by inner circumferential end parts81ato81e,respectively, serving as parts of the base813and will be described later. Note that the solder S is an example of a conductive member provided at the first surface.

As illustrated inFIGS.6and7, the wiring board8is disposed such that the first planar part81is located between the sensor7and the connection terminals4, for example. As illustrated inFIG.8, in the first planar part81, a bent part800is formed between one end part having the hole parts H1connected to the connection terminals4, and another end part819connected to the sensor7.

For example, each of the connection terminals4is inserted through each of the hole parts H1of the wiring board8at a Y-axis positive direction side. The plurality of connection terminals4are lined, for example, in a direction intersecting the insertion direction (orthogonal direction (X-axis direction) in the embodiment). As described above, the connection terminals4inserted through the hole parts H1are, for example, soldered to the wiring board8and fixed to the wiring board8by the solder S. The hole parts H1are formed, for example, in the same number as the number of connection terminals4.

In the first planar part81of the wiring board8, the first surface811and the second surface812are, for example, in a front-to-back relationship in the direction where the connection terminals4pass (Y-axis positive direction), and the second surface812is a surface at the opposite side of the first surface811. The second surface812side of the first planar part81of the wiring board8opposes a part of the housing2. In the present embodiment, the second surface812side opposes the projected part229being a part of the housing2, via the reinforcing member90.

The wiring lines84are formed at the first surface811side of the wiring board8, as described above. The wiring lines84have five first lands85ato85ebeing parts electrically connected to the connection terminals4. In the following, when the plurality of first lands85ato85eare represented without distinction, the first lands85ato85emay be referred to as first lands85. The first land85is formed at a part surrounding each of the hole parts H1. A size of the connection terminal4is, for example, larger than the hole part H1, and is smaller than a size of the part surrounded by the first land85. Note that the first land85is an example of a conductive member.

The wiring lines84extend to the other end part819of the first planar part81, for example, via the bent part800. The wiring lines84formed at the other end part819have second lands86being parts electrically connected to the sensor7. The second lands86are connected to, for example, terminals provided at the sensor7by the solder S. In other words, the terminals of the sensor7are electrically connected to the wiring board8by being soldered to the second lands86provided at the other end part819of the first planar part81.

Further, the wiring lines84extend to the third planar part83via the second planar part82of the wiring board8. The wiring lines84formed at the third planar part83have third lands (not illustrated) being parts electrically connected to the terminals33of the motor3.

Next, the connection between the wiring board8and the connection terminals4will be described.FIG.9is a plan view of a first planar part of the wiring board according to the first embodiment.FIG.10Ais a cross-sectional view taken along a line A-A inFIG.9,FIG.10Bis a cross-sectional view taken along a line B-B inFIG.9, andFIG.10Cis a cross-sectional view taken along a line C-C inFIG.9. InFIG.9, at a top, a diagram of a state before the connection terminal4is mounted is illustrated, at a middle, a diagram of a state after the connection terminal4is mounted and before the connection terminal4is soldered is illustrated, and at a bottom, a diagram of a state after the connection terminal4is soldered is illustrated. That is,FIG.10Aillustrates the diagram of the state before the connection terminal4is mounted,FIG.10Billustrates the diagram of the state after the connection terminal4is mounted and before the connection terminal4is soldered, andFIG.10Cillustrates the diagram of the state after the connection terminal4is soldered.

As illustrated inFIGS.9and10A, the first planar part81includes, for example, inner circumferential end parts81ato81c,and inner circumferential end parts81dand81e(not illustrated). The inner circumferential end part81ais formed at the inner side than the first land85aformed at the part surrounding the hole part H1of the wiring line84. Similarly, the inner circumferential end parts81bto81eare formed at the inner side than the first lands85bto85eformed at the parts surrounding the hole parts H1of the wiring lines84, respectively. That is, the inner circumferential end parts81ato81eare formed at positions where the hole parts H1are formed.

As described above, the inner circumferential end parts81ato81ebeing the parts of the first planar part81of the wiring board8are formed of a bendable material. The hole parts H1formed by the inner circumferential end parts81ato81eare smaller than the size of the connection terminal4. Thus, when the connection terminals4are inserted into the hole parts H1, the inner circumferential end parts81ato81edeform in a direction where the connection terminals4pass through the hole parts H1.

As illustrated inFIG.10B, when the connection terminal4is inserted into the hole part H1, the inner circumferential end part81bdeforms in a direction D (Y-axis positive direction) where the connection terminal4passes through the hole part H1. The deformed inner circumferential end part81bis in contact with an outer peripheral surface of the one end part49of the connection terminal4.

Next, when the connection terminal4is soldered to the first planar part81of the wiring board8, the solder S is placed at a position overlapping the first land85c,as illustrated inFIGS.9and10C. In this case, the inner circumferential end part81cdeformed in the direction D (Y-axis positive direction) where the connection terminal4passes through the hole part H1suppresses the outflow of the solder S in a direction opposite to the direction D (Y-axis negative direction). This makes it possible for the wiring board8in the present embodiment to suppress solder leakage from the hole part H1.

For example, a configuration is known to electrically connect connection terminals connecting the sensor and electronic components to external devices to a printed circuit board (PCB) or the like having a multi-layer power distribution configuration. In this case, for example, columnar connection terminals are fixed to the housing of the rotating device or the like.

However, when fixing the columnar connection terminals to the housing or the like, misalignment is likely to occur. The misalignment when fixing the connection terminals to the housing can cause the connection terminals to rattle.

Thus, in the present embodiment, the connection terminals4are held by the holding part225of the second housing22and the pressing part215of the first housing21. The pressing part215forms part of an inner wall part of the housing21. When a connector (terminals to be connected) of the external device (not illustrated) is inserted into the connector part200, the pressing part215, as the inner wall part, suppresses further insertion of the connector into the housing2. That is, the pressing part215is a part of the connector part200forming a closed space other than an insertion port201(opening) where the connector of the external device is inserted.FIG.11is a perspective view of a projected part of the first housing according to the first embodiment.FIG.12is a perspective view of a holding part of the second housing according to the first embodiment, andFIG.13is a perspective view of the pressing part of the first housing according to the first embodiment.

As illustrated inFIGS.11and13, in the present embodiment, the pressing part215including the first projection parts216ato216eand the second projection parts217ato217eis formed at the inside of the projected part219of the first housing21. As illustrated inFIGS.6and12, the holding part225including a groove part228, first holding grooves226ato226e,and second holding grooves227ato227eis formed at the inside of the projected part229of the second housing22. Note thatFIG.12illustrates an enlarged view of a portion corresponding to a reference sign U1inFIG.6, andFIG.13illustrates an enlarged view of a portion corresponding to a reference sign U2inFIG.11. In the following, when the first projection parts216ato216eare represented without distinction, the first projection parts216ato216eare referred to as first projection parts216, and when the second projection parts217ato217eare represented without distinction, the second projection parts217ato217eare referred to as second projection parts217. Further, in the following, when the first holding grooves226ato226eare represented without distinction, the first holding grooves226ato226eare referred to as first holding grooves226, and when the second holding grooves227ato227eare represented without distinction, the second holding grooves227ato227eare referred to as second holding grooves227. Note that the first projection parts216and the second projection parts217are examples of a protruding part, and the first holding grooves226and the second holding grooves227are examples of a recessed part.

The first projection parts216and the second projection parts217are formed of, for example, the same resin material as the housing2. In this case, the pressing part215including the first projection parts216, the second projection parts217, and a groove part218is integrally molded with the first housing21by, for example, injection molding of a resin using a mold. Similarly, the holding part225including the groove part228, the first holding grooves226, and the second holding grooves227is integrally molded with the second housing22by, for example, injection molding of a resin using a mold.

As described above, the flanges41of the connection terminals4are fitted into the groove part228of the second housing22. Parts of the connection terminal4other than the flanges41are held by the first holding groove226and the second holding groove227. The first holding grooves226and the second holding grooves227are formed side by side in a direction, and in this direction, the connection terminals4are inserted (Y-axis positive direction). In the present embodiment, the first holding grooves226are formed at the Y-axis negative direction side in relation to the groove part228at the holding part225, and the second holding grooves227are formed at the Y-axis positive direction side in relation to the groove part228at the holding part225. That is, the first holding grooves226and the second holding grooves227are formed at positions where the groove part228is sandwiched at the Y-axis positive direction side.

At the pressing part215of the first housing21, the groove part218is formed at a position corresponding to the groove part228of the second housing22. The flanges41of the connection terminals4are also fitted into the groove part218. The pressing part215is formed with the first projection parts216and the second projection parts217at positions corresponding to the first holding grooves226and the second holding grooves227of the second housing22. The first projection parts216and the second projection parts217press the connection terminals4held by the holding part225of the second housing22from an upward direction (Z-axis positive direction). In other words, the connection terminals4are sandwiched between the first projection parts216and the first holding grooves226and are sandwiched between the second projection parts217and the second holding grooves227.

FIG.14is a cross-sectional view taken along a line D-D inFIG.13,FIG.15Ais a cross-sectional view taken along a line E-E inFIG.13, andFIG.15Bis a cross-sectional view taken along a line F-F inFIG.13. As illustrated inFIG.14, a pair of the first projection part216and the second projection part217are formed side by side at positions sandwiching the groove part218in the insertion direction (Y-axis positive direction) of the connection terminal4. In other words, the pair of the first projection part216and the second projection part217presses the connection terminal4downward (in the Z-axis negative direction) from both sides at positions sandwiching the flange41of the connection terminal4. This makes it possible to suppress rattling in the insertion direction (Y-axis positive direction) of the connection terminal4. Further, a height of an end part48of the connection terminal4(an end part at the opening201side or the external device side of the connector part200) can be set to a predetermined height. Here, the predetermined height refers to, for example, a distance in the Z-axis direction to the end parts48of the connection terminal4from each of one part219aof the first housing and one part229aof the second housing, forming the connector part200and opposing each other. This makes it possible to insert the connection terminals4into a connector of an external device having any height and shape. Note that the insertion direction of the connection terminals4is a direction where the connection terminals4are inserted into the connector of the external device. In addition, the insertion direction of the connection terminals4is a longitudinal direction of the connection terminals4.

As illustrated inFIG.15A, the first projection parts216and the second projection parts217are formed in polygonal shapes having top parts P1, such as triangles. When the first housing21is coupled to the second housing22, the first projection parts216and the second projection parts217press the connection terminals4held at the first holding grooves226and the second holding grooves227of the second housing22from the upward direction (Z-axis positive direction). At that time, the top parts P1of the first projection parts216and the second projection parts217are deformed as illustrated inFIG.15B.

As illustrated inFIG.15B, the top parts P2of the second projection parts217dand217eare pressed against the connection terminals4and deformed. The second projection parts217ato217c(not illustrated) and the first projection parts216(not illustrated) are also deformed. This allows the connection terminals4to be securely fixed to the housing2because the connection terminals4are sandwiched between the first projection parts216and the first holding grooves226and between the second projection parts217and the second holding grooves227.

As described above, in the present embodiment, the wiring board8includes the base813including the hole part H1and the inner circumferential end part81aforming the hole part H1, and the wiring line84including the part85surrounding the hole part H1. The inner circumferential end part81aof the base813is disposed at the inner side than the part85surrounding the hole part H1. The inner circumferential end part81aof the base813is deformed in the direction passing through the hole part H1. This makes it possible to suppress solder leakage from the hole part H1.

In the present embodiment, the rotating device1includes the motor3, the plurality of gears6, the plurality of connection terminals4for electrically connecting to the outside, and the housing2accommodating the motor3, the gears6, and the connection terminals4. The housing2is formed with the first housing21and the second housing22. The second housing22includes the recessed parts226and227, and the connection terminals4are engaged into the recessed parts226and227. The first housing21is provided with the protruding parts216and217protruding toward the connection terminals4and the recessed parts226and227. The connection terminal4are pressed toward the recessed parts226and227by the protruding parts216and217. With this configuration, rattling of the connection terminals4is suppressed, and the connection terminals4can be securely fixed to the housing2.

Second Embodiment

Next, a wiring board80according to a second embodiment will be described with reference to the drawings. Note that the wiring board80according to the second embodiment and the wiring board8according to the first embodiment described above have the same basic structure, and the same components are denoted by the same reference signs and specific descriptions will be omitted.

FIG.16is a perspective view of a wiring board according to the second embodiment,FIG.17is a plan view of a first planar part of the wiring board according to the second embodiment, andFIG.18is a perspective view of the wiring board with connection terminals inserted according to the second embodiment. Note that inFIGS.16and18, the reinforcing member90and the second housing22are not illustrated.FIG.18illustrates a diagram of a state before the connection terminals4are soldered to the wiring board80.

As illustrated inFIG.16, the wiring board80according to the second embodiment differs from the wiring board8according to the first embodiment. The inner circumferential end part87eforming a hole part H2is provided with a plurality of projected parts87e1to87e4in a base871of a first planar part87. In the following, when the plurality of inner circumferential end parts87ato87eare represented without distinction, the inner circumferential end parts87ato87emay be referred to as inner circumferential end parts87.

As illustrated inFIG.17, in the second embodiment, a plurality of projected parts87a1to87a4project from four direction of the hole part H2. In addition, the plurality of projected parts87a1to87a4are formed at the inner side than the first land85aformed at a part surrounding the hole part H2of the wiring line84. Also, in the second embodiment, the hole part H2formed by the inner circumferential end part87aformed by the plurality of projected parts87a1to87a4is smaller than the size of the connection terminal4. With this configuration, when the connection terminal4is inserted into the hole part H2, the plurality of projected parts87a1to87a4forming the inner circumferential end part87aare each deformed in a direction where the connection terminal4passes through the hole part H2. In the case illustrated inFIG.17, when the connection terminal4cis soldered to the first land85c,the outflow of the solder S is suppressed by the plurality of deformed projected parts87a1to87a4.

As illustrated inFIG.17, when the connection terminal4is inserted into the hole part H2, a plurality of projected parts87b1to87b4forming the inner circumferential end part87beach individually deform in the direction where the connection terminal4passes through the hole part H1and are in contact with the outer peripheral surface of the connection terminal4. When the plurality of projected parts87b1to87b4are individually deformed, wrinkles are less likely to occur at the base871, for example, at the vicinity of an apex of the hole part H2, compared with the case where the inner circumferential end part81baccording to the first embodiment is deformed. This makes it possible to suppress solder leakage more effectively from the hole part H2in the second embodiment, because the inner circumferential end part87bof the base871is in contact with the connection terminal4without a gap. When the plurality of projected parts87b1to87b4are individually deformed, the inner circumferential end part87bof the base871is easily deformed following the movement of the connection terminal4, thus improving workability when mounting the connection terminal4.

As described above, in the second embodiment, the inner circumferential end part87aof the base871includes the plurality of projected parts87a1to87a4projecting inward of the hole part H2. The plurality of projected parts87a1to87a4are lined in the circumferential direction of the hole part H2. This makes it possible to suppress solder leakage more effectively from the hole part H2.

The present invention has been described above based on the embodiments, but the present invention is not limited to the embodiments, and it goes without saying that various modifications are possible without departing from the gist of the present invention. Various modifications within a scope not departing from the gist are included in the technical scope of the present invention, and this is obvious to a person having skill in the art from the description of the claims.

For example, although the rotating device1including five connection terminals4is described, the number of connection terminals4is not limited to five. Although the case is described where the hole parts H1and H2are quadrangular, the shape is not limited to being quadrangular, and the shape of the hole part may be freely changed according to, for example, the shape of the connection terminal. For example, when the cross-sectional shape of the connection terminal is triangular, the hole part may also be triangular. In this case, in the second embodiment, the inner circumferential end part87amay be formed by, for example, three projected parts87a1to87a3.

The first projection part216and the second projection part217pressing the connection terminal4have been described as a triangular prism shape, but the first projection part216and the second projection part217may have another shape such as a pentagonal prism, as long as the top parts are pressed and deformed. The first projection part216and the second projection part217may be a three-dimensional shape of a pyramid, such as a triangular pyramid, quadrangular pyramid, or circular cone.FIG.19is a perspective view of a pressing part of a first housing according to a modified example. As illustrated inFIGS.19(b) and (c), the first projection part216and the second projection part217being the three-dimensional shape of a pyramid, may be formed at a plurality of locations in the insertion direction of the connection terminal4and the direction intersecting the connection terminal4(orthogonal direction in the embodiment). As illustrated inFIGS.19(b) and (c), one of the first projection part216and the second projection part217may be a prism such as a triangular prism or a pyramid such as a triangular pyramid or a quadrangular pyramid, and the other may have a three-dimensional shape different from the three-dimensional shape of the one. The shapes of the first projection part216and the second projection part217before deformation, the first projection part216and the second projection part217after deformation, or the first projection part216and the second projection part217without deformation, may be different from each other. The configuration of the first projection part216and the second projection part217is described. In the configuration, the first projection part216and the second projection part217extend in the insertion direction of the connection terminal4(Y-axis positive direction). However, the configuration is not limited to this configuration and, for example, the first projection part216and the second projection part217may extend in another direction, such as a direction orthogonal to the insertion direction of the connection terminal4(X-axis direction).

The first projection part216and the second projection part217, pressing the connection terminal4, have been described as being integrally molded with the first housing21by the injection molding of the resin using the mold. However, not limited to the injection molding, the first projection part216and the second projection part217formed as separate parts may be joined to the first housing21. The first projection part216and the second projection part217may be formed of a material other than the resin, as long as the material is softer than the material of the connection terminal4. The material of the first projection part216and the second projection part217is, for example, plastically deformable, but the material is not limited to this, and may be elastic.

REFERENCE SIGNS LIST