JPH1187150A - Support device for annular or cylindrical component and coil using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support device for stably supporting annular or cylindrical components of every possible sizes on a board. SOLUTION: This device 11 comprises two pairs of support members 11A-11D, respectively disposed in the radial and thickness directions X, Y of a toroidal reactor with spacings corresponding to the size of a reactor 1. End face supports 11d butted to an end faces 1b of the reactor 1 and extending approximately at a right angle to the butted faces 11b are formed at outer ends 11c of the pairs of support members 11A, 11C, 11B, 11D which are disposed in the thickness direction of the reactor 1. Pins 12 for fixing the support members 11A-11D to a printed wiring board 4 with spacings corresponding to the size of the reactor 1 are inserted in support member-fixing through-holes 4e of the board 4 and extend from the bottom faces 11a of the members 11A-11D.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support device capable of stably supporting an annular or columnar part of any size on a substrate and a coil device using the same.

[0002]

2. Description of the Related Art For example, when mounting a ring-shaped component such as a toroidal coil device or a cylindrical component such as a tubular capacitor on a printed circuit board (PCB), it is usually necessary to mount the component on a printed circuit board (PCB) due to the mounting space and heat dissipation. In many cases, an annular or cylindrical component is mounted with its outer peripheral arc surface facing the mounting surface of the printed wiring board. FIG. 6 shows an example in which a toroidal reactor as a toroidal coil device is mounted with an outer peripheral arc surface facing a mounting surface of a printed wiring board as a substrate. A toroidal reactor 1 shown in FIG. 6 includes an annular core 2 and a winding 3 wound around the core 2.
And lead wires 3 formed at the beginning and end of winding 3
a and 3b. On the other hand, through holes 4a, 4b for inserting the leads 3a, 3b of the reactor 1 are formed in the printed wiring board 4, and the leads 3a, 3b of the reactor 1 are inserted into the through holes 4a, 4b of the printed wiring board 4. The reactor 1 is fixed on the printed wiring board 4 by being fixed by soldering or the like. In the mounting example shown in FIG. 6, since the weight of the toroidal reactor 1 itself is supported by the lead wires 3a and 3b, the reactor 1 has a weight of 20 g or less, or the reactor 1 is not subjected to much vibration or impact. Used in equipment. Therefore, when the weight of the reactor 1 exceeds 20 g, or when the reactor 1 is used in a device that applies vibration or impact to the reactor 1, the center of gravity of the reactor 1 is near the center of the core 2 in the radial direction. As a result, the reactor 1 swings and an enormous moment acts on the lead wires 3a and 3b, and the lead wires 3a and 3b are broken.
a, 3b may be cut. Furthermore, when the wire diameter of the winding 3 is large in addition to the above conditions, the copper foil lands formed in the through holes 4a and 4b of the printed wiring board 4 may be broken. When the reactor 1 is suspended from the top and bottom of FIG. 6 and mounted on the printed wiring board 4, the weight of the reactor 1 is added to the soldering portion through the lead wires 3 a and 3 b, and the solder creep (solder crack or crack) is caused. Peeling) may occur. In particular, in the case of a printed wiring board having a wiring pattern formed only on one side, electrical contact between the reactor 1 and the printed wiring board 4 becomes incomplete due to the above-described problem occurring in the reactor 1 and the printed wiring board 4. In a high-voltage circuit, there are many cases in which smoke or ignition occurs from a poor contact point.

In order to solve the above problem, in the mounting example shown in FIG. 7, a bottom surface 5a facing the surface 4c of the printed wiring board 4 and a contact surface 5b contacting a part of the arc surface 1a of the toroidal reactor 1 are provided. A pedestal 5 made of a synthetic resin as a supporting device having the above structure is disposed between the surface 4c of the printed wiring board 4 and the arc surface 1a of the reactor 1. In the mounting example shown in FIG. 7, since a part of the arc surface 1 a of the reactor 1 contacts the contact surface 5 b of the pedestal 5, the rocking of the reactor 1 is prevented, so that the reactor 1 acts in the radial direction X of the reactor 1. Reactor 1 is stably supported on printed wiring board 4 against external force. Further, when the adhesive is applied to the contact surface 5b of the pedestal 5 and the arc surface 1a of the reactor 1,
Reactor 1 is firmly fixed to pedestal 5 and reactor 1
Swing can be more reliably prevented. Similarly, when an adhesive is applied to the bottom surface 5a of the pedestal 5 and the surface 4c of the printed wiring board 4, the pedestal 5 is firmly fixed on the printed wiring board 4, and the lead wires 3 of the reactor 1 are vibrated or impacted.
The moment received by a and 3b can be made extremely small. 8, a projection 6 protruding from the bottom surface 5a of the pedestal 5 is formed on a part of the bottom surface 5a of the pedestal 5, and the pedestal 5 is formed in a pedestal fixing hole 4d formed in the printed wiring board 4 in advance.
By inserting the protrusions 6 of FIG. 3 and heating the protrusions of the protrusions 6 to approximately the solder temperature in a solder bath, the protrusions 6 may be plastically deformed to fix the pedestal 5 on the printed wiring board 4. . Further, as shown in FIG. 9, metal fixing pins 7 are implanted in the bottom surface 5a of the pedestal 5, and the fixing pins 7 of the pedestal 5 are inserted into through holes 4e for fixing the pedestal formed in the printed wiring board 4. Lead 3a, 3b of reactor 1
At the same time, the pedestal 5 may be fixed on the printed wiring board 4 by soldering or the like. Further, the reactor 1 may be bound together with the pedestal 5 to the printed wiring board 4 through a binding band through the inner hole 1 c of the reactor 1.

[0004]

The problem to be solved by the present invention is shown in FIGS.
In the mounting example shown in FIG. 1, since a part of the arc surface 1a of the toroidal reactor 1 and the contact surface 5b of the pedestal 5 need to be always in contact, if the outer diameter of the toroidal reactor 1 is different, The pedestal 5 cannot be used. Even if the outer diameter of the toroidal core 2 is the same, the wire diameter of the winding 3 corresponding to the rated current value and the number of turns of the winding 3 corresponding to the inductance value are required. The finished outer diameter of the reactor 1 often differs depending on various conditions. Further, since the outer shape of the core 2 varies depending on the component manufacturer, a pedestal 5 corresponding to the outer diameter of each reactor is required in order to correspond to the toroidal reactor 1 of any size. For this reason, since the types of the pedestals 5 are considerably increased, the manufacturing cost of the dies for manufacturing these, and the inventory management and maintenance costs become expensive.
Therefore, from the viewpoint of manufacturing cost reduction, there is a need for a supporting device capable of stably supporting the toroidal reactor 1 of the minimum type and of any size on the printed wiring board 4.

Accordingly, an object of the present invention is to provide a supporting device capable of stably supporting an annular or cylindrical component of any size on a substrate and a coil device using the same.

[0006]

According to the present invention, there is provided an apparatus for supporting an annular or cylindrical component, comprising: a bottom surface facing a substrate surface; and a contact surface abutting a part of an arcuate surface on an outer periphery of the annular or cylindrical component. The annular or columnar component is disposed between the surface of the substrate and the circular arc surface of the outer periphery of the annular or columnar component to stably support the annular or columnar component on the substrate. This support device,
Four supports arranged in pairs in the radial direction and the thickness direction of the annular component or in the radial direction and the length direction of the cylindrical component at intervals according to the size of the annular or cylindrical component An end surface supporting portion made of a member and abutting on an outer end portion of each of the pair of supporting members arranged in a thickness direction of the annular component or a longitudinal direction of the cylindrical component, respectively, with an end surface of the annular or cylindrical component. Are formed so as to extend substantially perpendicular to the contact surface, and are inserted into fixing holes formed in the substrate, and each of the support members is spaced at an interval according to the size of the annular or columnar component. Fixing means for fixing to the substrate is provided so as to protrude from the bottom surface of each of the support members. Further, the pair of support members are provided with connecting means for connecting the pair of support members arranged in the thickness direction of the annular component or the length direction of the columnar component so as to extend and contract in the thickness direction or the length direction. Each member may be provided between members. Each support member is arranged in a pair in the radial direction and the thickness direction of the annular component or in the radial direction and the length direction of the cylindrical component at intervals according to the size of the annular or cylindrical component, and fixing means are provided. To fix each support member on the substrate. Thereby, when mounting the annular or cylindrical part on the substrate, a part of the circular surface of the annular or cylindrical part always abuts on the abutting surface of each supporting member, and the annular surface of each of the supporting members has an annular surface. Alternatively, since the end surfaces of the cylindrical parts are always in contact with each other, the swing of the annular or cylindrical parts due to vibration or impact is prevented, and the annular or cylindrical parts of any size can be stably supported on the substrate. Further, when connecting means is provided between each pair of support members arranged in the thickness direction of the annular component or the length direction of the columnar component, at least one fixing means is provided on the bottom surface of each support member. If provided, rotation of each support device around the fixing means can be prevented, so that the number of fixing means can be reduced.

Further, a coil device using the supporting device according to the present invention is provided with a core having a ring shape or a columnar shape, a winding wound on the core, and a start end and a termination end of the winding. And a supporting device having a bottom surface facing the substrate surface and a contact surface that contacts a part of an arc surface of the core on which the winding is wound, wherein the substrate surface and the winding are wound. By disposing the supporting device between an arc surface of the mounted core and inserting and fixing the lead wire into a hole formed in the substrate, the core on which the winding is wound is formed. It is stably supported and fixed on the substrate. In this coil device, the supporting device includes a pair in the radial direction and the thickness or the length direction of the core on which the winding is wound at an interval corresponding to the size of the core on which the winding is wound. The windings are wound around the outer ends of each of the pair of supporting members arranged in the thickness or length direction of the core on which the winding is wound. An end surface supporting portion that is in contact with the end surface of the core on which the wire is wound is formed to extend substantially perpendicularly to the contact surface, and is inserted into a fixing hole formed in the substrate and the winding is formed. Fixing means for fixing the support members to the substrate at intervals according to the size of the core on which is wound are provided so as to protrude from the respective bottom surfaces of the support members. In another embodiment of the present invention, the pair of support members arranged in the thickness or length direction of the core on which the winding is wound are connected to be able to expand and contract in the thickness or length direction. A connecting means is provided between each of the pair of support members. Each support member is arranged in pairs in the radial direction and the thickness or length direction of the coil device at intervals according to the size of the annular or columnar coil device, and each support member is fixed to the substrate by the fixing means. Fix on top. Thereby, when mounting the annular or columnar coil device on the substrate, a part of the arc surface of the coil device always abuts on the contact surface of each support member, and the coil device respectively contacts the end surface support portion of each support member. Of the annular or cylindrical coil device due to vibration or impact is prevented. Therefore, it is possible to stably support the annular or cylindrical coil device of any size on the substrate, thereby preventing the coil device or the substrate from being damaged due to vibration or impact. Furthermore, when connecting means is provided between each pair of support members arranged in the thickness or length direction of the annular or cylindrical coil device, at least one fixing means is provided on the bottom surface of each support member. If provided, rotation of each support member around the fixing means can be prevented, so that the number of fixing means can be reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the support device for an annular or cylindrical component according to the present invention is applied to a toroidal reactor will be described below with reference to FIG. However,
In FIG. 1, the same portions as those shown in FIGS. 6 to 9 are denoted by the same reference numerals, and description thereof will be omitted. As shown in FIG. 1, four support devices 11 of the present embodiment are arranged in pairs in the radial direction and the thickness direction of the reactor 1 at intervals according to the size of the toroidal reactor 1. Of supporting members 11A to 11D. Each support member 11A-11
D is a bottom surface 1 facing the front surface 4c of the printed wiring board 4.
1a, a contact surface 11b that contacts a part of the arc surface 1a of the reactor 1, and an outer end 11c of each of a pair of support members 11A, 11C, 11B, 11D arranged in the thickness direction of the reactor 1. An end surface support portion 11d formed substantially perpendicularly to the contact surface 11b and abutting against the end surface 1b of the reactor 1; and a support member fixed to the printed wiring board 4 which is implanted on the bottom surface 11a and formed on the printed wiring board 4 in advance. It has two metal fixing pins 12 as fixing means inserted into the through hole 4e. The supporting members 11A and 11D and the supporting members 11B and 11C have the same shape.

The mounting method of the toroidal reactor 1 using the support device 11 having the above configuration is as follows. First, a total of 8 for fixing the support members formed in advance on the printed wiring board 4 in accordance with the size of the reactor 1.
Four support members 11A are provided in each through hole 4e.
Insert two fixing pins 12 provided on each of the bottom surfaces 11a of 11D to 11D. Thereby, four support members 11A-
11D are arranged in pairs in the radial direction and the thickness direction of the reactor 1 at intervals corresponding to the size of the reactor 1. Next, the lead wire 3 of the winding 3 of the reactor 1
a, 3b are inserted into through holes 4a, 4b formed in the printed wiring board 4 in advance. At this time, each support member 11A
11D abut a part of the arc surface 1a of the reactor 1 and the end surface 1b of the reactor 1 abuts on the end surface support portions 11d of the support members 11A to 11D. 11A-11D
Thereby, it is stably supported on the printed wiring board 4. Then, the reactor 1 protruding from the back surface of the printed wiring board 4
3a and 3b of the winding 3 and the supporting members 11A to 11A
By fixing the 1D fixing pins 12 by soldering, the reactor 1 and the supporting members 11A to 11D are firmly fixed on the printed wiring board 4.

As described above, in the present embodiment, the four support members 11A to 11D are formed as a pair in the radial direction and the thickness direction of the reactor 1 at intervals corresponding to the size of the toroidal reactor 1. Arranged and each support member 11A ~
Part of the arc surface 1a of the reactor 1 is brought into contact with the contact surface 11b of the reactor 11D, and the end surface 1b of the reactor 1 is brought into contact with the end surface support portions 11d of the support members 11A to 11D. Accordingly, the rocking of the reactor 1 is prevented, so that the toroidal reactor 1 of any size is stably placed on the printed wiring board 4 with respect to the external force acting in the radial direction X and the thickness direction Y of the reactor 1. I can support it.
Therefore, breakage or breakage of the lead wires 3a, 3b of the toroidal reactor 1 of any size due to vibration or impact, and damage to the lands of the through holes 4a, 4b of the printed wiring board 4 are prevented. It is possible to do.

The support device 11 of the embodiment shown in FIG. 1 can be modified. For example, the support device 11 shown in FIG. 2 is a connecting means for connecting each pair of support members 11A, 11C, 11B, 11D arranged in the thickness direction of the toroidal reactor 1 so as to extend and contract in the thickness direction. The connecting plate 13 is connected to a pair of support members 11A, 11C, 11B,
It is provided between 11D. The connecting plate 13 shown in FIG. 2 includes a pair of support members 11A, 11C, 11B,
11D is movably inserted into a groove 14 formed in the back surface portion 11e. In the support device 11 of the embodiment shown in FIG. 2, if at least one fixing pin 12 is provided on the bottom surface 11a of each of the support members 11A to 11D, the rotation of each of the support members 11A to 11D around the fixing pin 12 is performed. Since this can be prevented, there is an advantage that the number of fixing pins 12 can be reduced as compared with the supporting device 11 of the embodiment shown in FIG.
FIG. 3 shows that the connecting plate 13 is contracted so that the opposing surfaces 11 of the pair of support members 11A and 11C and 11B and 11D are formed.
An embodiment is shown in which f is approached to each other to correspond to the mounting of the reactor 1 having the thin annular core 2.

The embodiments of the present invention are not limited to the above embodiments, and various modifications are possible. For example, in each of the above embodiments, the bottom surface 11 of each of the support members 11A to 11D is provided.
FIG. 8 shows an embodiment in which a metal fixing pin 12 is implanted as a fixing means into a, and the supporting members 11A to 11D are fixed on the printed wiring board 4 by soldering the protruding portions of the fixing pin 12. As in the case shown in FIG.
Protrusions as fixing means protruding from the bottom surface 11a of each of the support members 11A to 11D are formed on a part of the bottom surface 11a of each of the support members 11A to 11D. 4 may be fixed. In each of the above embodiments, the arc surface 1a and the end surface 1b of the reactor 1 and the support members 11A to 11A
An adhesive is applied to each of the contact surface 11b and the end surface support portion 11d of the 1D, and the reactor 1 and each of the support members 11A to 11A are applied.
D may be firmly fixed. In this case, swinging of reactor 1 due to vibration or impact can be completely prevented. Furthermore,
The reactor 1 may be bound to the printed wiring board 4 together with the support members 11A to 11D through a binding band through the inner hole 1c of the reactor 1. In the embodiment shown in FIGS. 2 and 3, the back portion 11 of each of the pair of support members 11A and 11C and 11B and 11D arranged in the thickness direction of the reactor 1.
e, the connecting plate 13 is movably inserted into each groove 14 of each of the pair of support members 11A, 11C, 11B, 11D.
Have been shown to be connected to each other in a stretchable manner, but as shown in FIG. 4, each pair of support members 11A, 11C, 11B,
A dovetail groove 15 having a wedge-shaped cross-section is formed on each contact surface 11b of 11D, and a connecting plate 16 having a trapezoidal cross-section is inserted into the dovetail groove 15 so as to be movable.
1C, 11B and 11D may be connected to each other so as to be able to expand and contract. In addition, as shown in FIG.
A through-hole 17 is formed between the opposing surface 11f and the outer end 11c of each of 11C, 11B, and 11D, and a connecting rod 18 is movably inserted into the through-hole 17 to form a pair of support members 11A. 11C, 11B and 11D may be connected to each other so as to be able to expand and contract. Further, it can be easily understood that the support device of the present invention can be applied to a columnar component such as a tubular capacitor or a rod-shaped coil device without being limited to an annular component such as a toroidal reactor.
For example, in each embodiment shown in FIGS.
If the length of 3, 3, or the connecting rod 18 is extremely long, it is possible to correspond to a cylindrical component such as a tubular capacitor or a rod-shaped coil device.

[0013]

According to the present invention, an annular or columnar part of any size can be stably supported on a substrate by a minimum number of supporting devices. It is not necessary to prepare various kinds of support devices,
It is possible to greatly reduce the cost of manufacturing a mold for manufacturing the support device, and the cost of inventory management and maintenance. In addition, when the support device according to the present invention is applied to an annular or cylindrical coil device, damage to the coil device or the substrate due to vibration or impact is prevented for annular or cylindrical coil devices of any size. It is possible to do.

[Brief description of the drawings]

FIG. 1 is an assembled perspective view showing an embodiment of the present invention.

FIG. 2 is an assembled perspective view showing another embodiment of the present invention.

FIG. 3 is an assembled perspective view showing the embodiment when the connecting plate of FIG. 2 is contracted;

FIG. 4 is an exploded perspective view showing a modified embodiment of the connecting means.

FIG. 5 is an exploded perspective view showing another modified embodiment of the connecting means.

FIG. 6 is a front view and a side view showing a mounting example of a conventional coil device.

FIG. 7 is a front view and a side view showing an example of mounting a coil device using a base.

FIG. 8 is a front view and a side view showing a mounting example of a coil device using a pedestal having a projection.

FIG. 9 is a front view and a side view showing a mounting example of a coil device using a pedestal having fixing pins.

[Explanation of symbols]

1. . . Reactor (coil device), 1a. . . Arc surface. 1b. . . End face, 1c. . . 1. inner hole; . . core,
3. . . Winding, 3a, 3b. . . 3. lead wire; . . Printed wiring board (board), 4a, 4b. . . Through hole,
4c. . . Surface, 4d. . . Holes, 4e. . . 4. Through holes (holes); . . Pedestal (supporting device), 5a. . . Bottom,
5b. . . Abutment surface, 6. . . Protrusions, 7. . . 10. fixing pin; . . Support device, 11A-11D. . . Support member, 11a. . . Bottom, 11b. . . Abutment surface, 11
c. . . Outer end, 11d. . . End face support, 11e. . .
Rear part, 11f. . . 11. facing surface; . . 12. fixing pins (fixing means); . . Connecting plate (connecting means), 1
4. . . Groove, 15. . . Dovetail, 16. . . Connecting plate, 1
7. . . Through-hole, 18. . . Connecting rod

Claims (4)

[Claims] 1. A bottom surface facing a substrate surface, and a contact surface abutting a part of an arc surface on an outer periphery of the annular or columnar part, and an arc on an outer periphery of the substrate surface and the annular or columnar part. A support device for an annular or columnar component that is disposed between the annular or columnar component and stably supports the annular or columnar component on the substrate, wherein the support device corresponds to the size of the annular or columnar component. Consisting of four support members arranged in a pair in the radial direction and the thickness direction of the annular component or in the radial direction and the length direction of the columnar component at intervals, the thickness direction of the annular component or An end surface supporting portion that abuts an end surface of the annular or cylindrical component at an outer end portion of each of the pair of support members arranged in a longitudinal direction of the cylindrical component extends substantially perpendicularly to the abutting surface. For fixing, formed on the substrate A fixing means inserted into the hole and fixing the support members to the substrate at intervals according to the size of the annular or columnar component is provided so as to protrude from the respective bottom surfaces of the support members. Supporting device for annular or cylindrical parts. 2. A connecting means for connecting the pair of support members arranged in the thickness direction of the annular component or the length direction of the columnar component so as to extend and contract in the thickness direction or the length direction. The support device for an annular or columnar part according to claim 1, which is provided between a pair of support members. 3. A core having a ring shape or a columnar shape, a winding wound on the core, lead wires formed at a start end and an end of the winding, a bottom surface facing the substrate surface, A supporting device having a contact surface that abuts a part of the arc surface of the core on which the winding is wound, between the substrate surface and the arc surface of the core on which the winding is wound. A coil that stably supports and fixes the core on which the winding is wound on the substrate by disposing the supporting device and inserting and fixing the lead wire into a hole formed in the substrate. In the device, the supporting device is a pair of the core in which the winding is wound at a distance in accordance with the size of the core in which the winding is wound in a radial direction and a thickness or a length direction of the core. Consisting of four support members arranged and arranged, wherein the winding is wound An end surface supporting portion that comes into contact with an end surface of the core on which the winding is wound at an outer end portion of each of the pair of support members disposed in the thickness or length direction of the core is provided with respect to the contact surface. The support members are formed on the substrate at intervals corresponding to the size of the core wound with the windings and inserted into fixing holes formed in the substrate. A coil device, wherein fixing means for fixing is provided so as to protrude from a bottom surface of each of the support members. 4. A connecting means for connecting the pair of support members arranged in the thickness or length direction of the core on which the winding is wound so as to be extendable and contractible in the thickness or length direction. The coil device according to claim 3, which is provided between each pair of support members.