JPH0672300U - Electronic component holder - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent the electronic component holder from being attached in a state of being lifted from the printed circuit board. A component holder 13 for holding an electronic component 11, a board contact surface 14 for contacting a printed board 16, and a positioning protrusion 15 press-fitted into a positioning hole 16a of the printed board.
And. A plurality of ridges 15a extending in the longitudinal direction are provided on the outer peripheral portion of the positioning protrusion 15, and the positioning protrusion 15 is positioned in the positioning hole 16a with the ridge line portion of the convex portion 15a in contact with the inner peripheral surface of the positioning hole 16a. The height of the ridge 15a is set so that the ridge 15a is press-fitted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electronic component holder used for holding electronic components such as semiconductor ICs and various sensors on a printed circuit board.

[0002]

[Prior art]

 When electronic components such as a semiconductor IC and various sensors are mounted on a printed circuit board, the electronic component may be attached to the printed circuit board via a holder in order to prevent vibration of the electronic component. For example, in a brushless DC motor, a magnetic sensor that detects the magnetic pole of the rotor is attached to a printed circuit board that is arranged orthogonal to the rotation axis of the motor. In this case, if the magnetic sensor vibrates, a detection error will occur. Therefore, the magnetic sensor is attached to a printed circuit board through a holder.

As shown in FIG. 5, a holder 1 used for this kind of purpose includes a component holding portion 1 a for fitting and holding electronic components, and a substrate contact surface 1 b for contacting a printed circuit board 2. , A positioning protrusion 1c projecting at a right angle from the board contact surface, the positioning projection 1c is inserted into a positioning hole 2a provided in the printed board 2, and the board contact surface b is the plate surface of the printed board. Is placed on the printed circuit board in a state of being in contact with. Then, the terminals provided on the electronic component (not shown) are soldered to the conductive portion of the printed circuit board, and the electronic component is fixed to the printed circuit board 2 together with the holder 1.

Further, when it is necessary to detachably attach the semiconductor IC to the printed circuit board, a holder having a function as a connector having a large number of contacts for contacting IC terminals is fixed to the printed circuit board. The IC is mounted on the substrate via the holder. The holder used in this case has a component holding portion for fitting and holding the IC, a board contact surface for contacting the plate surface of the printed board, and a positioning projection protruding from the board contact surface. The positioning protrusion is inserted into a positioning hole provided in the printed board, and the positioning contact is arranged with the board contact surface brought into contact with the printed board. In this case, the holder itself is provided with a large number of terminals, and the terminals are soldered to a predetermined conductive portion of the printed circuit board to fix the holder to the printed circuit board.

[0005]

[Problems to be solved by the device]

 In the conventional holder used to hold the electronic component with respect to the printed circuit board, the outer diameter r'of the positioning protrusion 1c is set to be smaller than the inner diameter r of the positioning hole 2a provided on the printed circuit board to perform positioning. Since the protrusion 1c is provided so as to be loosely fitted in the positioning hole 2a, the holder 1 is easily lifted from the plate surface of the printed circuit board 2 before the terminals of the electronic component are soldered to the printed circuit board. there were. Therefore, a gap d may be generated between the holder and the printed board in the process of soldering the terminal, and it may not be possible to correctly fix the electronic component at a predetermined position. Further, if a gap d is formed between the holder and the printed circuit board, when external force is applied, a large stress is applied to the soldered part of the terminal and the conductive part of the printed circuit board, and the soldered part peels off, or There was a risk that the conductive parts would be disconnected.

It is also conceivable that the outer diameter of the positioning protrusion 1c of the holder is set to be larger than the inner diameter of the positioning hole 2a so that the protrusion is pressed into the positioning hole. However, because of machining accuracy, it is difficult to make the outer diameter of the positioning protrusion and the inner diameter of the positioning hole as large as the design value.Therefore, by making the outer diameter of the positioning protrusion larger than the inner diameter of the positioning hole. If the positioning protrusion is pressed into the hole, the outside diameter of the positioning protrusion is too large for the positioning hole, making it difficult to press the protrusion into the positioning hole. On the other hand, there was a problem that the outer diameter of the positioning protrusion was too small to obtain the press-fitted state.

An object of the present invention is to provide an electronic component holder capable of firmly attaching an electronic component to a base plate without forming a gap with a printed circuit board.

[0008]

[Means for Solving the Problems]

 According to the present invention, a component holding portion for holding an electronic component and a board contact surface arranged in contact with a printed circuit board and a board protruding at a right angle from the board contact surface are provided on the print board. The present invention relates to an electronic component holder provided with a columnar positioning protrusion that is inserted into the determined positioning hole.

According to the first aspect of the invention, a plurality of ridges extending in the longitudinal direction of the protrusion are provided on the outer peripheral portion of the positioning protrusion at equal angular intervals, and the ridge line portion of the ridge is printed. The height of the ridge is set so that the projection is press-fitted into the positioning hole while being in contact with the inner peripheral surface of the hole of the substrate.

Further, in the invention according to claim 2, the positioning protrusion is formed to have a polygonal cross-sectional shape, and the ridge line portion of each corner of the positioning protrusion is formed on the inner peripheral surface of the positioning hole. The positioning projection is press-fitted into the positioning hole while being in contact with the positioning hole.

[0011]

[Action]

 As described above, when the protrusions are provided on the positioning protrusions of the holder and the ridges of the protrusions are brought into contact with the inner circumference of the positioning holes provided on the printed circuit board, the height of the protrusions is increased. Even if is set slightly higher, the force is concentrated on the ridge of the positioning protrusion to locally deform the inner circumference of the positioning hole, or while deforming the positioning protrusion itself, press the protrusion smoothly. be able to. Therefore, the positioning protrusion and the positioning hole can be fitted with each other in a proper press-fitting state so that the substrate contact surface of the holder can be kept in contact with the plate surface of the printed circuit board without a gap, and the terminal can be connected to the printed circuit board. The holder can be prevented from rising from the printed circuit board until it is soldered to, and electronic components can be firmly attached to the printed circuit board.

Further, even after soldering the terminals, the substrate contact surface of the holder can be kept in contact with the plate surface of the printed circuit board without a gap, so that when external vibration is applied, the solder of the terminal of the electronic component is soldered. It is possible to prevent a large stress from being applied to the attachment part and peeling off the soldering part, and a large stress to the conductive part of the substrate from causing the conductive part to be disconnected.

Even when the positioning projection has a polygonal cross-section and the ridges of the corners of the projection are brought into contact with the inner circumference of the positioning hole, the same effect as described above can be obtained.

[0014]

【Example】

 1 and 2 show a first embodiment of the present invention. In this embodiment, 10 is an electronic component holder according to the present invention, and 11 is an electronic component held by the holder 10. The electronic component 11 in the example is, for example, a magnetic sensor (for example, a Hall IC) used to detect a magnetic pole of a rotor of a brushless DC motor.

In the holder 10, a pair of leg portions 12, 12 extending substantially parallel to each other is integrally provided on one end side thereof with a component holding portion 13 having a U-shaped cross section and extending upright at right angles from the leg portions. Therefore, the lower surfaces of the legs 12 and 12 are the substrate contact surface 14. At the lower part of each leg 12, a columnar positioning protrusion 15 is provided which protrudes at a right angle from the substrate contact surface 14. The holder 10 is integrally molded of insulating resin.

The electronic component 11 is formed by projecting a plurality of lead terminals 11b in parallel from one end of a main body 11a having a structure in which a semiconductor element is housed in a resin exterior, and the main body 11a is a holder part. It is fixed in the groove portion 13b of the holding portion 13. The body 11a of the electronic component may be fixed to the component holding portion 13 by being pressed into the groove portion 13b, or may be fixed to the component holding portion 13 by adhesion.

The electronic component holder 10 is arranged on the printed circuit board in a state where the positioning protrusions 15 and 15 are press-fitted into the positioning holes provided on the printed circuit board 16 and the circuit board contact surface 14 is in contact with the printed circuit board 16. , Each terminal 11b of the electronic component 11 is led out to the back surface side of the printed circuit board through the through hole 16a provided in the printed circuit board, and each terminal 11b is soldered to the conductive portion 16b on the back surface side of the printed circuit board. .

In this embodiment, in order to facilitate the press-fitting of the positioning protrusions 15, as shown in FIG. 2C, the protrusions 15a extending in the longitudinal direction of the respective positioning protrusions 15 are provided on the outer periphery of the protrusions. A plurality (three in the illustrated example) are provided at equal angular intervals (at equal intervals in the circumferential direction), and the ridge line portion (top portion) of each protrusion 15a contacts the inner circumference of the positioning hole 16a. In this state, the height of each ridge 15a is set so that each positioning protrusion 15 is press-fitted into the positioning hole 16a.

If the ridge 15a is provided on the positioning protrusion 15 as described above, when the positioning protrusion is press-fitted into the positioning hole, a force is concentrated on the ridge of the ridge to change the ridge itself. The positioning protrusion is smoothly pressed into the positioning hole and the substrate contact surface 14 is contacted with the printed circuit board 16 while shaping it or deforming the part of the positioning hole where the ridges on the inner periphery are in contact. Can be in a state.

The holder 10 is held in a state in which the board contact surface 14 is in contact with the board surface of the printed board by the fitting of the positioning protrusion 15 and the positioning hole 16a in the press-fit state. In the process of soldering the terminals 11b of the electronic component 11 to the printed circuit board, the holder 11 does not float up from the printed circuit board 16.

Since the board contact surface 14 of the holder is in contact with the plate surface of the printed board 16 while the terminals of the electronic component are soldered to the printed board, the external force acting on the holder 10 is It is received by the printed circuit board 16 through the surface 14. Therefore, large stress is not applied to the soldered part of the terminal and the conductive part of the printed circuit board made of copper foil, etc., and there is no fear of peeling the soldered part or disconnecting the conductive part of the board. You can

FIG. 3 shows a second embodiment of the present invention. The electronic component holder 20 of this embodiment has a function as a connector for connecting terminals of a semiconductor IC or the like in a removable manner. Is. The component holder 21 of the electronic component holder of this embodiment is derived from the component holder 21 having a contactor (not shown) for contacting the terminals of the electronic component, and the respective contactors of the component holder 21. The lead terminal 22 is led out to the outside from the side surface of the component holding portion 21 and is bent at a right angle to the substrate 16 side. The lower surface of the component holding portion 21 is a board contact surface 23, and a positioning protrusion 24 is provided in a state of protruding at a right angle from the board contact surface. As in the example shown in FIG. 2C, a plurality of protrusions extending in the longitudinal direction are provided on the outer peripheral portion of the positioning protrusion 24 at equal angular intervals.

The holder 20 of this embodiment is attached to the printed circuit board in a state where the positioning protrusion 24 is press-fitted into the positioning hole 16a of the printed circuit board and the circuit board contact surface 23 is in contact with the printed circuit board 16, and each terminal is attached. 22 is inserted into the through hole provided in the printed board 16, and each terminal is soldered to the conductive portion on the back surface of the board.

In the above embodiment, a plurality of ridges extending in the longitudinal direction are provided on the outer periphery of the positioning protrusion, and the ridges of the ridge contact the inner circumference of the positioning hole. As shown in FIGS. 4 (A) and 4 (B), the positioning projections 15 or 24 have a cross-sectional shape of a polygon such as a triangle or a quadrangle, and the ridges of the corners c of each positioning projection are positioned. The positioning protrusion may be pressed into the positioning hole while being in contact with the inner circumference of the hole 16a.

[0025]

[Effect of device]

 As described above, according to the present invention, since the protrusions are provided on the positioning protrusions of the holder and the ridges of the protrusions are brought into contact with the inner circumference of the positioning holes formed on the printed circuit board, Even if the height of the ridge is set slightly higher, the force is concentrated on the ridge of the positioning projection to locally deform the inner circumference of the positioning hole, or while deforming the positioning projection itself, It can be pressed in smoothly. Therefore, the positioning protrusion and the positioning hole can be fitted with each other in a proper press-fitting state so that the substrate contact surface of the holder can be kept in contact with the plate surface of the printed circuit board without a gap, and the terminal can be printed. It prevents the holder from rising from the printed circuit board until it is soldered to the printed circuit board, and allows electronic components to be firmly attached to the printed circuit board.

Further, according to the present invention, since the substrate contact surface of the holder can be kept in contact with the plate surface of the printed circuit board without a gap even after the terminals are soldered, it is possible to apply vibrations from the outside. It is possible to prevent a large stress from being applied to the soldered portion of the terminal of the electronic component and the soldered portion from peeling off, and a large stress to the conductive portion of the substrate from causing the conductive portion to be disconnected.

When the positioning projection has a polygonal cross section as in the invention described in claim 2, the same effect as described above can be obtained.

[Brief description of drawings]

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

2A and 2B are a front view and a right side view of the embodiment of FIG. 1, respectively, and FIG. 2C shows a fitting state of a positioning protrusion and a positioning hole of a printed board provided in the embodiment. FIG.

FIG. 3 is a cross-sectional view showing another embodiment of the present invention.

4A and 4B are cross-sectional views showing different modified examples of the positioning protrusion used in the present invention.

FIG. 5 is a cross-sectional view showing a fitting state of a positioning protrusion used in a conventional holder and a positioning hole of a printed circuit board.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Electronic component holder 11 Electronic component 11a Electronic component main body 11b Terminal 12 Leg part 13 Component holding part 14 Board contact surface 15 Positioning protrusion 16 Printed board 20 Electronic component holder 21 Component holding part 22 Terminal 23 Board contact surface 24 Positioning protrusion

Claims (2)

[Scope of utility model registration request] 1. A component holding portion for holding an electronic component and a board contact surface arranged in contact with the printed board, and a board provided so as to project at a right angle from the board contact surface. An electronic component holder having a columnar positioning protrusion to be inserted into the positioning hole, wherein a plurality of ridges extending in the longitudinal direction of the protrusion are provided on an outer peripheral portion of the protrusion. The height of the ridge portion is set so that the positioning protrusion is press-fitted into the positioning hole in a state where the ridge line portion of the positioning hole is in contact with the inner peripheral surface of the positioning hole. 2. A component holding part for holding an electronic component and a board contact surface arranged in contact with the printed board and a board provided so as to project at a right angle from the board contact surface. An electronic component holder having a columnar positioning protrusion to be inserted into a positioning hole, wherein the positioning protrusion is formed to have a polygonal cross-sectional shape, and the ridge line portion at each corner of the positioning protrusion is positioned to the positioning unit. An electronic component holder, wherein the positioning protrusion is formed so as to be press-fitted into the positioning hole while being in contact with the inner peripheral surface of the hole.