JP2002246235A - Circuit device and its encapsulating case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circuit device which does not require the use of another member for fixing a coil body, can be reduced in manufacturing cost or improved in productive efficiency, can be mounted and dismounted easily on and from a circuit board or chassis and the size of which can be reduced as a whole, and to provide an encapsulating case used for encapsulating the device. SOLUTION: A voltage transformer 1 has the coil body Z (a combined core K composed of first and second cores K1 and K2 and a coil T) and the encapsulating case 2. The case 2 is integrally formed of a synthetic resin and has a housing section 3 which houses the coil body Z, a substrate supporting section 7 formed on the bottom face of the section 3 to support the circuit board 10, and a mounting/dismounting mechanism 6 which can mount the housing section 3 on a proscribed position of the chassis 2. On the rear face of the housing section 3, a pressing section 4b and a projecting section 4c are formed to press the first core K1. On the side faces of the section 3, in addition, locking members 5b and locking clicks 5c are formed to lock the movement of the coil body Z in the pressed direction of the body Z when the body Z is pressed by means of a pressing section 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit device usable for a power supply device such as a voltage conversion transformer and a choke transformer, and an outer case of the circuit device.

[0002]

2. Description of the Related Art Conventionally, there is a voltage conversion transformer as shown in FIG. FIG. 5A is a plan view showing a state in which the voltage conversion transformer is mounted on a circuit board, and FIG.
It is an AA sectional view in (a).

As shown in FIGS. 5 (a) and 5 (b),
A conventional voltage conversion transformer includes a coil body Z and a coil body Z.
And a metal spring plate member 103 provided separately from the outer case 102 and fixing the coil body Z in the outer case 102. Coil body Z includes a pair of mating core K comprising a first core _{K 1} and second core _{K 2,} the first core _{K 1} and the second core _{K 2}
The coil body Z is fixed by the spring plate member 103.

Conventional voltage converting transformer 101, a pair of mating core K (first core _{K 1} and second core _{K 2)} is a downward engaging piece 103a at both ends constituting the coil body Z
And a spring plate member 10 having a concave portion 103b at the center.
3 is pressed and fixed.

[0005] First, for accommodating the coil body Z in the exterior case 102 in a state where the coil T is interposed between the first core K ₁ and the second core K _2. Next, the spring plate member 103
The engaging pieces 103a provided at both ends of the
When the mating core K is attached to the outer case 102, the mating core K is urged by the spring force of the concave portion 103 b of the spring plate member 103 and pressed and fixed in the outer case 102.

As shown in FIGS. 5A and 5B, the voltage conversion transformer 101 is fixedly mounted on a circuit board 110 by mounting claws 104, and is electrically connected by lead wires 109.

[0007]

However, in the conventional voltage conversion transformer 101, the spring plate member 103 must be separately used to fix the coil body Z, so that the number of parts is increased, and the entire device is not used. Manufacturing costs tend to be high. Further, if the spring plate member 103 made of metal is incorporated in the device, it may be a factor that lowers the insulation and impedance in the device.

The manufacturing process of fixing the coil body Z by incorporating the spring plate member 103 into the outer case 102 is relatively complicated and troublesome, and it is desired to improve the production efficiency. Further, the assembled voltage conversion transformer 101 takes time to disassemble, and for example, it may be difficult to change the conversion voltage of the voltage conversion transformer 101 or replace the coil T when changing the choke constant. In addition, when the spring plate member 103 is incorporated in the voltage conversion transformer 101, the entire device tends to be large because of having the pressing surface of the concave portion 103b and the engaging piece 103a.

Further, the conventional voltage conversion transformer 101 comprises:
It is necessary to separately use the mounting claws 104 for mounting on the circuit board 110, and the mounting operation tends to be troublesome. Further, when the mounting claw 104 is mounted on the circuit board 110, the mounting claw 10
Since the protrusions 4 protrude, improvements in production efficiency and miniaturization are desired.

The present invention has been made in view of the above points, and does not require the use of a separate spring plate member or the like as a means for fixing the coil body, and reduces the number of parts. Provided is a circuit device and an outer case of the circuit device, which can reduce the manufacturing cost and improve the production efficiency, and can easily attach and detach to and from a circuit board and a chassis and reduce the size of the entire device. With the goal.

[0011]

A circuit device according to the present invention comprises a first core, a second core, a coil interposed between the first core and the second core, An accommodating portion for accommodating a first core and the second core and the coil, a pressing portion for pressing the first core or the second core, and a pressing portion for pressing the first core and the second core. A locking portion for locking the movement of the pressing portion in the pressing direction, wherein the pressing portion and the locking portion are formed integrally with the housing portion.

Further, the housing portion has a box shape with an open front surface, the pressing portion has a pressing member formed on a rear surface of the housing portion, and the locking portion is provided on the housing portion. It has a locking member formed on the side surface, and a locking claw formed on the tip end of the locking member and protruding inside the accommodating portion.

[0013] Further, there is provided a detachable mechanism capable of attaching the accommodating portion to a predetermined position on an attaching member.

Further, the attachment / detachment mechanism is engaged with a tongue formed integrally with the lower surface of the housing portion and a projection formed on the tongue and provided on the mounting member. And a claw portion.

[0015] Further, it has a board supporting portion for supporting a circuit board on which an electric circuit is formed.

Further, the board supporting portion is formed integrally with the lower surface of the housing portion, and is provided with an engaging portion inserted into a groove provided in the circuit board, and an insertion portion of the circuit board into the engaging portion. And a leg having an inclined portion for guiding.

Further, the outer case of the circuit device of the present invention comprises:
A first core and a second core, an accommodation part that accommodates a coil interposed between the first core and the second core, and the first core or the second core. A pressing portion for pressing, and a locking portion for locking movement of the first core and the second core in a pressing direction by the pressing portion, wherein the pressing portion and the locking portion are accommodated in the housing. It is formed integrally with the part.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a circuit device and an outer case of the circuit device according to the present invention will be described with reference to FIGS. FIG. 1 is an exploded perspective view showing a circuit device according to the present invention, FIG. 2 (a) is a front view showing an outer case of the circuit device according to the present invention, and FIG. FIG. 2C is a sectional view taken along line B in FIG.
3 is a perspective view showing a process of attaching the circuit device shown in FIG. 1 to a circuit board and a chassis.
(A) And (b) is a front view including the partial cross section which shows the process of attaching the circuit device shown in FIG. 1 to a circuit board and a chassis step by step.

The circuit device and the outer case of the circuit device according to the present invention are applied to a voltage conversion transformer as a power supply device.

As shown in FIG. 1, a voltage conversion transformer 1 as a circuit device has a coil Z and an outer case 2 accommodating the coil Z. Coil body Z includes a pair of mating core K comprising a first core K ₁ and second core K _2,
Consists of a coil T interposed between the first core K ₁ and the second core K _2, the coil T is interposed between the first core K ₁ and the second core K ₂ It is fixed in the exterior case 2 in the state where it was set. In addition, E-shape, I-shape,
Various shapes such as C-shape, Z-shape, and U-shape can be used, and a pair of cores such as EI, EZ, CC, EE, and UU can be used. Are used facing each other. In this case, the combined core K consists of a first core K ₁ and I-shaped second core K ₂ Metropolitan of E-shape.

As shown in FIGS. 2 (a) to 2 (c), the outer case 2 is integrally formed of an insulating synthetic resin, and is formed in a rectangular parallelepiped box shape with an open front surface. An accommodating portion 3 for accommodating the coil body Z (the combined core K (the first core K ₁ , the second core K ₂ ) and the coil T) therein.
And the lower surface of the housing portion 3 for supporting the circuit board 10 (see FIGS. 3 and 4), and the substrate support portion 7 formed integrally with the housing portion 3 and the lower surface side of the housing portion 3 And a detachable mechanism 6 attachable to a predetermined position on the chassis 20 (see FIGS. 3 and 4).

The housing 3 corresponds to the shape of the coil body Z (the combined core K (the first core K ₁ , the second core K ₂ ) and the coil T), and has a box shape capable of housing the coil body Z. Is formed. In addition, as shown in FIGS. 1 and 2, the first core K ₁ (or, of the coil body Z) in the center of the rear surface of the housing portion 3 (the surface facing the front surface that is the opening side). Second core K
₂ ) It has a pressing part 4 for pressing. The pressing portion 4 is formed integrally with the housing portion 3 and has a notch 4
a pressing member 4b defined by a and having a predetermined elasticity
And a projection 4c provided at the tip of the pressing member 4b. The pressing member 4b is formed in a pair with the protruding portions 4c adjacent to each other, and the coil body Z housed in the housing portion 3 is configured such that the protruding portion 4c has the first core K ₁ (or the second core K ₁ ). Of the core K ₂ ) is pressed against the opening side by the elastic force of the pressing member 4b.

Further, as is apparent from FIG.
The coil body Z (coupling core)
K (first core K₁, The second core K₂) And coil T)
Locking portion for locking the movement of the pressing portion 4 toward the front opening side
5 The locking portion 5 is formed integrally with the side surface of the housing portion 3
From the front side (opening side) of the storage section 3 to the rear side
Is defined by a notch 5a formed linearly toward
A locking member 5b having a predetermined elasticity;
That is formed at the tip of the housing and protrudes into the housing 3
And a claw 5c. The locking member 5b is a pair of
On the side surfaces, the locking claws 5c face each other
Near the top and bottom of the housing 3
, Respectively, that is, two sets are formed. And income
The coil body Z accommodated in the container 3 has a locking claw 4c
Core K₂(Or the first core K ₁Engage with the peripheral edge of
Then, the transfer in the pressing direction by the pressing portion 4 (the pressing member 4b) is performed.
The movement is locked.

Here, a process of assembling the coil body Z (the combined core K (the first core K ₁ , the second core K ₂ ) and the coil T) into the outer case 2 will be described. As shown in FIG. 1, the coil T is attached to the first upper core K _1, a second core K _{2 (in} this case, I-shaped core) on the coil T to fit the. Then, by inserting the second core K ₂ a container 3 of the opening (front) side, the locking member 5b is accommodating portion 3 engaging claws 5c is retracted outward elastically deformed, the second it can be inserted core K _2. When the second core K ₂ is inserted into the housing body 3, the locking member 5 being elastically deformed outwardly
b is restored to the original position, and the locking claw 5c is moved to the second core K _2.
Engages with the peripheral edge portion. The first core K ₁ is based on the elastic force of the pressing member 4b in contact with the projection 4c, the opening but is pressed against the (front) side, the engaging claw 5c of the locking member 5b coil body Z since the second cores K ₂ is locked is brought into close contact with the housing portion 3 in a state where the coil T is interposed between the first core K ₁ and the second core K ₂ Fixed.

In FIG. 1, first, the coil body Z is assembled.
After being erected, it is incorporated into the storage part 3, but the first
Core K₁, Coil T, second core K₂In the order
You may do so. The coil body Z is housed in the outer case 2
The pressing part 4 and the locking part 5 formed integrally with the part 3
Because it can be easily fixed, high production efficiency and low cost
And the coil body Z comes into close contact with the accommodation portion 3.
Voltage conversion as a circuit device
The overall size of the transformer 1 can be reduced. Ma
The entire outer case 2 is integrally formed of synthetic resin.
It has insulation properties, so that insulation inside the equipment and
There is no danger of lowering impedance. Also, voltage conversion
Since the transformer 1 can be easily disassembled,
When changing the coil T when changing the pressure or changing the choke constant
Voltage conversion can be performed easily, and the voltage conversion
Separation of waste 1 can be easily performed.
Wear. Note that, in the present embodiment, the E-shaped
A (first core K₁), Coil T and I-shaped core (second
Core K₂) Are sequentially incorporated.
1 core K₁And the second core K₂The order of incorporating is reversible
And the second core K ₂Side is pressed by the pressing part 4
With the first core K₁The side is locked by the locking portion 5
It may be configured.

Next, the circuit board 1 is placed between the housing 3 and the lower surface.
0 (see FIGS. 3 and 4), and a substrate support portion 7 formed integrally with the housing portion 3 and a chassis 20 (see FIGS. 3 and 4) integrally formed on the lower surface side of the housing portion 3. The following describes the attachment / detachment mechanism 6 that can be attached to the above predetermined position.

As shown in FIGS. 2 (a) and 2 (b), the substrate supporting portion 7 is provided with an engaging portion 7a suspended from the lower surface of the housing portion 3.
And a leg 7b provided continuously below the engagement portion 7a,
A pair is provided at a predetermined interval from each other. Also,
As shown in FIG. 2A, the leg portion 7b includes an inclined portion 7c that is gradually inclined from a lower end portion of the engaging portion 7a, and a flange portion 7d formed wide at a boundary portion with the engaging portion 7a. Have. Engaging part 7
a is a groove 10a formed at the peripheral edge of the circuit board 10.
This is engaged with and held by a pair of grooves 10a formed corresponding to (see FIG. 3).

As is clear from FIGS. 2 (b) and 3, the attaching / detaching mechanism 6 is formed integrally between the pair of legs 7b by bending downward from the lower end surface of the substrate supporting portion 7. And a wedge-shaped claw 6b provided at the tip of the tongue 6a.

The chassis 20 (see FIGS. 3 and 4) as a mounting member is made of a metal plate or the like, and the circuit board 10 is fixed at a predetermined interval e ₁ (see FIG. 4A), and the voltage conversion is performed. It functions as a member for mounting and fixing a relatively heavy circuit device such as the transformer 1 at a predetermined position. In addition, at a predetermined position on the chassis 20 as an attachment member, a narrow hole 20a and a wide hole 20b, and a protruding portion 20c provided between the hole 20a and the hole 20b are formed. Have been. In addition, as shown in FIG.
0a, the width d ₁ are slightly larger than the width d ₂ of the claw portion 6b, it is possible to lock the movement in the arrow H direction and the opposite direction of the claw portion 6b.

Next, the voltage conversion transformer 1 as a circuit device is attached to the chassis 20 as an attachment member by the attachment / detachment mechanism 6.
A process of attaching the circuit board 10 to the predetermined position above and supporting the circuit board 10 by the board supporting unit 7 will be described.

As shown in FIGS. 3 and 4, the voltage conversion transformer 1 is moved in the direction of arrow G (shown in FIG. 4A) so that the tongue 6a of the attaching / detaching mechanism 6 is formed in the hole 20 of the chassis 20.
b, and then moved in the direction of arrow H (shown in FIG. 4A). At this time, the claw 6b formed in a wedge shape abuts on the protruding portion 20c, and the tongue 6a is elastically deformed downward, and the voltage conversion transformer 1 is further moved in the direction of arrow H (shown in FIG. 4A). The tongue 6a that has been elastically deformed is restored to its original position, and the claw 6b is
c and is held in the hole 20a. Width d ₁ of the holes 20a, since it is slightly larger than the width d ₂ of the claw portion 6b, the voltage conversion transformer 1 in this state is reliably fixed on the chassis 20 of the mounting member. If the tongue 6a is pressed downward to be elastically deformed and moved in the direction opposite to the arrow H (shown in FIG. 4A), the fixed voltage conversion transformer 1 can be removed. In addition, the voltage conversion transformer 1 as a circuit device and the outer case 2 of the circuit device according to the present invention can be easily attached to and detached from a predetermined position on the chassis 20 as an attachment member.

The peripheral edge of the circuit board 10 has an inclined portion 7.
c, the engaging portion 7a is smoothly inserted into the groove 10a of the circuit board 10. In this state, the circuit board 10
The lower surface side of the circuit board 1
0 can be easily and reliably held. Further, since the substrate supporting portion 7 is integrally formed with the housing portion 3 of the outer case 2 by a synthetic resin and has an insulating property, the circuit board 10 can be short-circuited even when an electric circuit is formed very close to the groove portion 10a. Does not occur, and the circuit board 1
It is possible to improve the efficiency of arranging the electric circuit formed on the zero.

The voltage conversion transformer 1 as a circuit device mounted on the circuit board 10 and the chassis 20
Is electrically connected to an electric circuit or the like on the circuit board 10 by a lead wire (not shown) or the like, and the voltage conversion transformer 1 as a circuit device according to the present invention and the outer case 2 of the circuit device are used. Even if it is fixed on the circuit board 10 and the chassis 20 as an attachment member, since there is no member that protrudes greatly on the back side of the circuit board 10, the distance e ₁ between the circuit board 10 and the chassis 20 (FIG. 4) (See (a)) can be set relatively small, and the distance e ₂ between the outer lower surface of the housing 3 and the tongue 6a of the attaching / detaching mechanism 6 is equal to the distance e.
₁ may be appropriately set. That is, the voltage conversion transformer 1 as the circuit device and the outer case 2 of the circuit device according to the present invention can also achieve the miniaturization of the entire device using the voltage conversion transformer 1.

In the present embodiment, the circuit device according to the present invention and the outer case of the circuit device are applied to a voltage conversion transformer, but can be applied to various circuit devices such as a noise filter.

[0035]

As described above, according to the circuit device and the outer case of the circuit device of the present invention, it is not necessary to use a separate spring plate member or the like as a means for fixing the coil body. The number can be reduced, manufacturing cost can be reduced and production efficiency can be improved, and attachment / detachment to / from a circuit board or a chassis can be facilitated and the entire device can be downsized.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a circuit device according to the present invention.

2A is a front view showing an outer case of the circuit device according to the present invention, FIG. 2B is a sectional view taken along line BB in FIG. 2A, and FIG. 2C is a sectional view taken along line CC in FIG. FIG.

FIG. 3 is a perspective view showing a step of attaching the circuit device shown in FIG. 1 to a circuit board and a chassis.

FIGS. 4A and 4B are front views including a partial cross-section showing a step of attaching the circuit device shown in FIG. 1 to a circuit board and a chassis.

FIG. 5A is a plan view showing a state in which a voltage conversion transformer as a conventional circuit device is mounted on a circuit board;
(B) is an AA sectional view in (a).

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Voltage conversion transformer 2 Exterior case 3 Housing part 4 Press part 4a Notch part 4b Press member 4c Projection part 5 Lock part 5a Cut part 5b Lock member 5c Lock nail 6 Detachment mechanism 6a Tongue part 6b Claw part 7 Substrate support Part 7a Engagement part 7b Leg 7c Inclined part 7d Flange part 10 Circuit board 10a Groove part 20 Chassis 20a Hole part 20b Projection part K Matching core K ₁ First core K ₂ Second core T Coil

Claims (7)

[Claims] A first core and a second core; a coil interposed between the first core and the second core; and a first core and the second core. An accommodating portion accommodating the coil; a pressing portion for pressing the first core or the second core; and a movement of the first core and the second core in a pressing direction by the pressing portion. A circuit device, comprising: a locking portion for stopping; and wherein the pressing portion and the locking portion are formed integrally with the housing portion. 2. The storage section has a box shape with an open front surface, the pressing section includes a pressing member formed on a rear surface of the storage section, and the locking section includes 2. The circuit device according to claim 1, further comprising: a locking member formed on a side surface; and a locking claw formed on a distal end portion of the locking member and protruding inside the housing portion. 3. The apparatus according to claim 1, further comprising: a detachable mechanism capable of attaching the housing portion to a predetermined position on an attachment member.
Or the circuit device according to claim 2. 4. The attachment / detachment mechanism engages with a tongue formed integrally on the lower surface side of the housing and a projection formed on the tongue and provided on the mounting member. The circuit device according to claim 3, further comprising a claw portion. 5. The circuit device according to claim 1, further comprising a board supporting portion for supporting a circuit board on which an electric circuit is formed. 6. The circuit board supporting portion is formed integrally with the lower surface of the housing portion, and engages with an engaging portion inserted into a groove provided in the circuit board, and inserts the circuit board into the engaging portion. The circuit device according to claim 5, further comprising a leg having an inclined portion for guiding. 7. A first core and a second core, and the first core and the second core.
An accommodating portion for accommodating a coil interposed between the first core and the second core; a pressing portion for pressing the first core or the second core; the first core and the second core; And a locking portion for locking the movement of the second core in the pressing direction by the pressing portion, wherein the pressing portion and the locking portion are formed integrally with the housing portion. Exterior case.