JP2679922B2 - Terminal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal device for connecting electric wires which is mounted on a board.

[0002]

2. Description of the Related Art For example, in an electronic ballast for lighting equipment, as shown in FIGS. 9 and 10, various electrical parts 2 for a ballast are mounted on an elongated substrate 1 and the end of the substrate 1 is mounted. A terminal device 3 for wiring is installed in the section, and the substrate 1 and the like are housed in a case (not shown) in a state where only the terminal device 3 is exposed.

The terminal device 3 has a plurality of wire insertion holes 4 on its upper surface.
And a case body 6 having a terminal accommodating portion 5 communicating with each electric wire insertion hole 4 inside and a wire accommodated in each terminal accommodating portion 5 of the case body 6 and inserted into each electric wire insertion hole 4 A plurality of terminals 7 are provided, and a plurality of them are installed in parallel in the width direction near the end of the substrate 1.

On the end of the substrate 1, a terminal number A is displayed by silk printing in correspondence with the position of the wire insertion hole 4 of each terminal device 3.

At the time of connecting the electric wire, the terminal number A displayed on the end portion of the substrate 1 is confirmed, and the electric wire is inserted into the corresponding electric wire insertion hole 4 for connection.

[0006]

However, since the terminal number A must be displayed by projecting the end portion of the substrate 1 outward from the position of the end surface of the terminal device 3, the size of the substrate 1 becomes long, and in particular, When the terminal devices 3 are installed on both ends of the substrate 1, the size of the substrate 1 becomes longer, which causes a problem of hindering the downsizing of the electronic ballast which is required to be downsized.

The present invention has been made in view of the above points, and an object of the present invention is to provide a terminal device which can cope with miniaturization of a substrate.

[0008]

According to a first aspect of the present invention, there is provided a case body having an electric wire insertion hole on an end face side thereof and a terminal accommodating portion communicating with the electric wire insertion hole inside thereof, which is installed on a substrate surface. A board that is provided with a terminal connected to an electric wire that is housed in the terminal housing portion of the case body and that is inserted into the electric wire insertion hole, and that is on the end surface side of the case body that has the electric wire insertion hole and on the installation surface side on the board surface. A notch is provided so as to be separated from the surface.

According to a second aspect of the invention, in the first aspect of the invention, the wire insertion direction of the case body into the wire insertion hole is inclined with respect to the substrate surface, and a notch is provided along the inclination direction. It is a thing.

[0010]

According to the first aspect of the present invention, when the terminal device is installed on the board surface, even if the end surface of the case body and the end surface of the board are set at substantially the same position, the end side of the board surface is formed by the notch. Is exposed, and the terminal number or the like displayed on the end of the substrate surface can be visually recognized.

According to a second aspect of the present invention, in the first aspect of the invention, the electric wire is inserted in an inclined direction so that the ease of insertion is ensured, and a display is made from the electric wire insertion direction through the notch, for example, at the end of the substrate surface. The visual confirmation of the pin number etc.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of an embodiment of the present invention will be described below with reference to FIGS.

In FIGS. 1 and 2, reference numeral 11 denotes a substrate, which is used for an electronic ballast for lighting equipment, for example, is formed in an elongated shape, has a printed wiring on the lower surface, and has a wiring diagram on the upper surface. In addition to being displayed by silk printing, the terminal number A is displayed by silk printing at the end corresponding to the position of the wire insertion hole 32 of the terminal device 21 described later.

On the upper surface of the board 11, various electric parts 12 for a ballast are mounted, and a plurality of terminal devices 21 are installed in parallel in the width direction at the ends.

The terminal device 21 comprises a case body 22 and terminals 23 housed in the case body 22.

The case body 22 is made of an insulating synthetic resin and has a plurality of wire insertion holes 32 formed on the upper side of the end face 31 on the outer end side. The wire insertion hole 32 is composed of a large-diameter portion 33 opening to the outside and a small-diameter portion 34 on the inner side, and its central axis, that is, the wire insertion direction, is formed in an inclined direction of an angle θ1 with respect to a bottom surface 35 installed on the substrate 11. Has been done.

Further, inside the case body 22, there is a wire insertion hole.
A terminal accommodating portion 36 that communicates with 32 is formed. An opening 37 into which the terminal 23 is inserted is formed on the lower surface of the terminal accommodating portion 36, and upper and lower wall surfaces are formed in a slanted shape along the wire insertion direction, and as shown in FIG. Grooves 38 and 39 are formed along the upper and lower edges of the wall surface of the. In addition, the wire insertion hole 32 that opens in the terminal storage portion 36
A stopper portion 40 is formed on the lower side in a protruding manner.

A cutout 41 is formed below the end face 31 at an angle of θ2 with respect to the bottom face 35. Further, on the upper surface of the case body 22, a locking hole 42 and a release hole 43 are formed so as to communicate with the terminal housing portion 36, respectively.

In the case body 22, the wire insertion direction is the opening / closing direction of the molding die, and the locking hole 42 and the release hole 43 are formed by a slide core. Further, if the angle θ2 of the cutout portion 41 is substantially the same as or larger than the angle θ1 in the wire insertion direction, die cutting in the wire insertion direction is possible and the mold structure is simplified.

The terminal 23 has a board portion 51, and the board portion 51
The upper and lower edges of the terminal accommodating portion 36 are formed in an inclined shape so that they can be fitted between the upper and lower wall surfaces of the terminal accommodating portion 36. The lock piece portion 53 is formed on one side surface side, and the lock piece portion 53 whose base end is joined to the lower wall surface of the terminal housing portion 36 from the lower edge portion of the substrate portion 51 is formed on one side surface side. .

The connecting piece portion 52 is formed with a connecting projection 54 projecting from the front end side in the insertion direction into the terminal accommodating portion 36 to the lower surface, and opens in one direction corresponding to the position of the release hole 43. Groove
55 is formed, and a locking piece portion 56 is formed corresponding to the position of the locking hole 42. In addition, a groove is provided on one side surface of the connecting piece 52.
A plurality of guide protrusions 57 that engage with the protrusion 38 are formed.

The locking piece portion 53 has a connecting piece portion 52 whose distal end portion is connected to the base plate portion 51 via a curved elastic portion 58.
Is elastically projected and formed on the lower surface side of the. In addition, a guide protrusion 59 that engages with the groove 39 is formed on one side of the base end of the locking piece 53.

Also, a plurality of leg portions are provided at the lower edge of the substrate portion 51.
60 is formed to project. Further, at the central portion of the base plate portion 51 and in the vicinity of the locking piece portion 56, projecting piece portions 61 and 62 are bent and formed on one side surface side.

Next, the operation of this embodiment will be described.

First, in order to assemble the case body 22 and the terminal 23, the terminal 23 is inserted through the opening 37 of the case body 22. At this time, the upper and lower guide protrusions 57 and 59 of the terminal 23 are engaged with the groove portions 38 and 39, respectively, and are inserted in parallel along the wire insertion direction. Then, at the same time that the insertion front end edge of the board portion 51 of the terminal 23 comes into contact with the stopper portion 40, at the same time, the locking piece portion 56 elastically engages in the locking hole 42, so that the terminal 23 is the terminal of the case body 22. Storage
It is retained inside 36 and retained.

Then, the legs are inserted and inserted into the upper surface of the substrate 11 to install various electric parts 12 and the legs 60
Then, the terminal device 21 is set by inserting and inserting, and the leg portion of each electric component 12 and the leg portion 60 of the terminal device 21 are soldered and connected to the wiring surface by an automatic soldering device.

The board 11 and the like are housed in a case (not shown) in a state where the terminal device 21 is exposed to form an electronic ballast.

When the terminal device 21 is installed on the board 11, as shown in FIGS. 1 and 2, the end surface 31 of the case body 22 and the end surface of the board 11 are substantially at the same position, but the notch 41 is formed.
Exposes a space between the end B of the substrate 11 and the width B.
The terminal number A displayed on the end of 11 is visible.

Therefore, when connecting the electric wire, the terminal number A of the substrate 11 can be confirmed through the notch 41 of the terminal device 21, and the electric wire 71 (shown in FIG. 7) can be inserted and connected to the corresponding electric wire insertion hole 32.

As shown in FIG. 7, the electric wire 71 is a covered electric wire in which a core wire 72 is covered with a covering portion 73, and the tip inserted into the terminal device 21 peels off the covering 73 to expose the core wire 72. . The total length L of the electric wire 71 inserted into the terminal device 21 is the length L1 of the covering portion 73 inserted into the large diameter portion 33 of the electric wire insertion hole 32,
The core wire 72 has a length including the length L2 at which the core wire 72 is connected to the lock terminal portion 53.

The terminal device 21 configured as described above is a substrate
Even if the end portion of 11 is shortened to approximately the same position as the end surface of the terminal device 21, the terminal number A can be visually recognized by the cutout portion 41, and the substrate 11 can be downsized.

By the way, FIG. 8 shows an example of the terminal device a having a substantially triangular shape in the case where the wire insertion direction is an inclined direction, but an unnecessary space c is provided below the wire insertion hole b due to the terminal structure housed inside. Occurs. Then, when the height H of the wire insertion hole b is increased in consideration of the wire insertability, the unnecessary space c is further increased as shown in FIG. 7. The terminal device 21 of this embodiment makes effective use of the unnecessary space c, and by removing the unnecessary space c, the terminal device 21 can be downsized and the notch 41 can be formed.

Further, when the wire insertion direction is the tilt direction, the area of the bottom surface 35 of the case body 22 joined to the substrate 11 is the case where the wire insertion direction is the vertical direction (for example, FIGS. 9 and 10).
It is larger than the case (1), and even if the notch 41 is provided, the area for stably joining the case body 22 to the substrate 11 can be secured.

In the above embodiment, the case where the wire insertion direction is the tilt direction has been described, but the wire insertion direction is the substrate 11
Also in the case of the horizontal direction parallel to the above, the notch 41 may be formed by utilizing the unnecessary space below the wire insertion hole 32, and the same effect as the above embodiment can be obtained.

[0035]

According to the first aspect of the present invention, since the notch is provided on the end face side of the case body of the terminal device having the wire insertion hole and on the installation face side to the substrate face, the end portion of the substrate is covered with the case. Even if the length is shortened to approximately the same position as the end face of the body, for example, the terminal number or the like displayed on the end of the substrate surface can be visually recognized by the notch, and the substrate can be downsized.

According to the invention of claim 2, in the invention of claim 1, by setting the wire insertion direction to be an inclined direction,
The ease of inserting the electric wire can be ensured, and by forming the notch along the inclination direction thereof, it is possible to ensure the visibility such as the terminal number on the board surface from the electric wire inserting direction.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a terminal device of the present invention.

FIG. 2 is a perspective view of the above embodiment.

FIG. 3 is a sectional view of the above embodiment.

FIG. 4 is a sectional view of a case body according to the above embodiment.

FIG. 5 is a plan view of the terminal according to the above embodiment.

FIG. 6 is a side view of the terminal of the above embodiment.

FIG. 7 is a side view of the electric wire connection state of the embodiment.

FIG. 8 is a side view illustrating an example in which the electric wire insertion direction is an inclined direction.

FIG. 9 is a side view of a conventional terminal device.

FIG. 10 is a perspective view of a conventional terminal device.

[Explanation of symbols]

 11 Board 21 Terminal device 22 Case 23 Terminal 32 Wire insertion hole 36 Terminal housing 41 Notch

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-223067 (JP, A) Actually open 59-123973 (JP, U) Actually open 59-77282 (JP, U) Actually open 59- 65471 (JP, U)

Claims (2)

(57) [Claims] 1. A case body having an electric wire insertion hole on an end face side and having a terminal accommodating portion communicating with the electric wire insertion hole inside and installed on a substrate surface, and an electric wire insertion accommodated in the terminal accommodating portion of the case body. A wire inserted into the hole, and a terminal connected to the hole, and a cutout portion that is separated from the board surface is provided on the end surface side of the case body having the wire insertion hole and on the installation surface side to the board surface. A terminal device characterized by the above. 2. The terminal according to claim 1, wherein the wire insertion direction into the wire insertion hole of the case body is inclined with respect to the substrate surface, and the notch is provided along the inclination direction. apparatus.