JPH0454692Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a terminal device comprising a self-locking connection terminal and a terminal cover provided to cover the connection terminal.

[Conventional technology]

For example, an electromagnetic device such as a discharge lamp ballast of a lighting device is provided with a terminal device for connecting its coil end portion to an external lead wire. As shown in FIG. 7, this device includes a self-locking connection terminal 3 attached to a coil bobbin 2 around which a coil 1 is wound, and a terminal cover 4 that houses the terminal 3.
It is formed from. The outer surface of one flange portion 2a of the coil bobbin 2 has markings shown in FIGS. 8 and 11.
As shown in the figure, a terminal block 5 is integrally molded, and a terminal mounting groove 6 whose top surface is open is formed in this terminal block 5. Furthermore, a pair of locking claws 7 are integrally molded on the flange portion 2a.

The connection terminals 3 are connected to the terminals 1 from FIG.
As shown in detail in FIG. 1, the rear end of the metal base plate 8 has a fixing piece 9 bent downward at a substantially right angle, and a part of this fixing piece 9 has a retaining tongue piece 9a.
is being cut up. Then, by inserting and fixing this fixing piece 9 into the terminal mounting groove 6 from above,
Connection terminals 3 are attached to the terminal block 5.

Furthermore, the terminal portion 1 of the coil 1 is placed on the base plate 8.
A connecting tongue piece 10 is provided which connects a. This tongue piece 10 is constructed by cutting and raising a part of the base plate 8 into a rectangular shape and folding this cut and raised part 180 degrees to the opposite side.
The coil end portion 1a is sandwiched between the base plate 8 and the base plate 8, and is spot welded.

A bent piece 11 is bent downward at the front end of the base plate 8, and the bent piece 11 is bent downward. An insertion hole 13 is provided for passing the wire A (see FIG. 8). A locking piece 14 is folded back toward the back side of the base plate 8 at the tip of the bent piece 11, and this locking piece 14 holds the lead wire A passing through the insertion hole 13 between it and the base plate 8. I'm starting to do that.

As shown in FIGS. 8 and 9, the lock piece 14
is a first bent portion 15 that is folded back in an arc shape with a smooth curvature from the tip of the bent piece portion 11 toward the back surface of the base plate 8, and a first bent portion 15 is provided continuously at the tip of this bent portion 15. It is formed from a second bent portion 16 and a clamping portion 17 that extends linearly from the tip of the bent portion 16 toward the back surface of the base plate 8 and comes into contact with or is close to the back surface of the base plate 8. There is. The second bent portion 16 has a smaller curvature than the first bent portion 15 and is bent in the opposite direction to the first bent portion 15 . Moreover, both bent portions 15 and 16, which are substantially S-shaped in side view, are elastically deformable in the vertical direction and have upward spring force toward the base plate 8 side. The holding portion 17 is inclined in a direction that moves away from the insertion hole 13 as it approaches the back surface of the base plate 8.

Further, a substantially box-shaped terminal cover 4 that covers the connection terminal 3 is a molded article of synthetic resin having electrical insulation properties. As shown in FIGS. 8 to 11 excluding FIG. 9, this cover 4 has a terminal storage section 18 whose rear surface, that is, the terminal block 5 side, is open, and a rear surface 18a of this storage section 18. It has a lead wire insertion hole 19 on the front surface that is open to the front side. The width B at the rear end of the terminal accommodating portion 18 is formed to be slightly wider than the width C of the connecting terminal 3, and the entrance width D of the terminal accommodating portion 18 is wider than the above width B. Furthermore, an engaging stepped portion 20 is formed on the inner ceiling of the terminal storage portion 18 . This stepped portion 20 is provided to sandwich the connecting terminal 3 between it and the tapered inner bottom surface 21 of the terminal storage portion 18, and also has a stepped portion 20 between it and the outlet end 19a of the lead wire insertion hole 19. It is formed by providing The height of the step 22 is approximately the same as the thickness of the base plate 8, so that when the connecting terminal 3 is properly stored, the back surface of the base plate 8 is located on the extension line of the outlet end 19a. It's like this. Furthermore, the terminal cover 4
Claw receivers 23 are formed on both sides of the rear end.

This terminal cover 4 is removably attached to the flange portion 2a by inserting it between a pair of locking claws 7 of the flange portion 2a and hooking these claws 7 on the claw receiving portion 23. . Then, from just before the completion of this installation, the connecting terminal 3 stored in the terminal storage part 18 is guided with its locking piece part 14 by the slope of the inner bottom surface 21 of the terminal storage part 18, and the locking claw 7
At the same time as the claw receiving portion 23 engages with the bent piece portion 11
The connecting terminal 3 is stored in an appropriate position where the front surface of the terminal accommodating portion 18 is brought into contact with the inner surface 18a of the terminal accommodating portion 18, and the connecting terminal 3 is held between the inner bottom surface 21 and the engagement step portion 20. The terminal cover 4 is attached by an automatic machine.

In the terminal device assembled in this way, when the lead wire A is inserted through the lead wire insertion hole 19, its tip end passes through the insertion hole 13 and passes through the holding portion 1.
7 is pressed to deform the holding part 17 in a direction away from the back surface of the base plate 8 , and the holding part 17 is inserted between the back surface of the base plate 8 and the tip of the holding part 17 . Then, the first and second bent portions 1
5 and 16, the lead wire A is held between the back surface of the base plate 8 and the tip of the holding part 17,
When the connection terminal 3 is electrically connected and mechanically held to prevent it from coming off at the same time, and a force is applied to pull out the lead wire A, the tip edge of the clamping portion 17 bites into the lead wire A and the lead wire Prevents A from falling out.

[The problem that the idea aims to solve]

By the way, there may be variations in the dimensions of the connection terminals 3, variations in the mounting positions when mounting the connection terminals 3 in the terminal mounting grooves 6 of the terminal block 5, and variations in the set positions of the coil bobbin 2 and the terminal cover 4 with respect to automatic machines. It is inevitable that variations within management standards will occur. Due to such variations, when the terminal cover 4 is attached to the flange portion 2a of the coil bobbin 2 by an automatic machine to cover the connection terminal 3, the connection terminal 3 and the terminal cover 4 may be positioned in the width direction. It shifts. Due to this positional shift, the connecting terminal 3 and the side wall 18b of the terminal storage portion 18 come into contact with each other and smoothly when the terminal device is assembled, regardless of the widthwise dimension difference between the connecting terminal 3 and the terminal cover 4. It may not be possible to assemble the terminal device. Further, even if such contact does not occur, the insertion hole 13 of the connection terminal 3 relative to the lead wire insertion hole 19 may be caused by the positional deviation in the width direction.
Since the facing position of the lead wire A is shifted in the width direction, there is a problem that the lead wire A cannot be smoothly inserted into the terminal device.

An object of the present invention is to provide a terminal device that is easy to assemble and allows smooth insertion of lead wires.

[Means to solve the problem]

In order to achieve the above object, in the terminal device of the present invention, the locking piece continuous to the tip of the folding piece of the self-locking type connecting terminal has a convex portion on the outer surface of the side portion of the folding piece. At the same time, an engaging groove in which the convex part engages is provided on the inner surface of the terminal housing part, which the bent piece side part contacts, in the terminal housing part of the terminal cover that stores the connecting terminal. It is formed from the entrance of the storage section toward the back side.

[Effect]

According to the terminal device of the present invention, when assembled by an automatic machine, the engagement groove of the terminal cover and the convex portion of the connection terminal are engaged, and this engagement causes the terminal cover and the connection terminal to be widened. Can be positioned in the direction. Then, while maintaining this positioning state, the connecting terminal in which the engaging groove is accommodated is guided to complete the assembly.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 to 6. In the explanation, the same components as the conventional terminal device explained with reference to FIG. 7 to FIG. 11 will be given the same reference numerals and the explanation will be omitted. The configuration will be explained below.

Bent piece part 1 in lock piece part 14 of connection terminal 3
A convex portion 14a consisting of a bead or the like along the circumferential direction is integrally provided on the outer surface of the first side portion, that is, the first bent portion 15 in this embodiment. By making this convex portion 14a a bead, the locking piece portion 14
The bending strength of And terminal cover 4
The terminal storage portion 18 is formed with an engagement groove 18c in which the protrusion 14a engages. This engagement groove 18c
is formed on the inner surface of the terminal accommodating portion 18 that is in contact with the first bent portion 15 of the lock piece portion 14, that is, on the inner bottom surface 21 in the case of this embodiment. In addition,
The rear end (inlet) of the engagement groove 18c is tapered and opened as shown in FIG.

In a terminal device with such a configuration,
During assembly by an automatic machine, the convex portion 14a provided on the locking piece portion 14 of the connecting terminal 3 enters and engages with the engagement groove 18c of the terminal storage portion 18, so that the connecting terminal 3 and the terminal cover 4 are positioned in the width direction, and the engagement groove 18c guides the connecting terminal 3 to be accommodated while maintaining this positioning state. Therefore, there is no possibility that the connection terminal 3 and the side wall 18b of the terminal storage portion 18 come into contact with each other, and the insertion of the terminal cover 4 into the connection terminal 3 is facilitated. Note that this insertion is performed until the bending piece 11 of the connecting terminal 3 comes into contact with the inner surface 18a of the terminal storage part 18, and at the same time as this contact, the locking claw 7 and the claw receiving part 23 engage with each other. The terminal device is assembled in the normal state shown in FIG. In this assembled state, the front upper surface of the base plate 8 of the connecting terminal 3 housed in the terminal housing part 18 is engaged with the engagement step part 20, and the first bent part 15 is in the terminal housing part 18. The connecting terminal 3 is engaged with the inner bottom surface 21 , thereby holding the connecting terminal 3 between the engagement step portion 20 and the inner bottom surface 21 . Moreover, by the above assembly, the insertion hole 13 of the connecting terminal 3 and the lead wire insertion hole 1 which are opposite to each other are formed.
9 and the outlet end 19a can be reduced, and therefore the lead wire A can be inserted smoothly.

[Effect of idea]

According to the present invention configured as described above, a convex portion is provided on the outer surface of the locking piece of the connecting terminal, and an engagement groove with which the convex portion engages is provided on the inner surface of the terminal housing portion of the terminal cover. By arranging it from the entrance of the storage section toward the rear end side, it is possible to eliminate the contact between the side wall of the terminal storage section and the connection terminal, allowing smooth automatic assembly, and also making it possible to smoothly insert the lead wire.

[Brief explanation of the drawing]

1 to 6 show an embodiment of the present invention,
Fig. 1 is a cross-sectional view of the terminal device showing a state in the middle of assembly, Fig. 2 is a cross-sectional view of the assembled terminal device, Fig. 3 is a rear view of the terminal cover, and Fig. 4 shows the terminal cover together with the connecting terminal. 3 is a sectional view taken along the line - in FIG. 3, FIG. 5 is a perspective view of the connecting terminal, and FIG. 6 is a side view of the connecting terminal. 7 to 11 show a conventional example, FIG. 7 is an exploded perspective view, FIG. 8 is a cross-sectional view of the terminal device showing a state in the middle of assembly, FIG. 9 is a side view of the connecting terminal, and FIG. 10 11 is a rear view of the terminal cover, and FIG. 11 is a sectional view showing the terminal cover along with the connection terminal along the line - in FIG. 10. 3... Connection terminal, 4... Terminal cover, 8... Base plate, 11... Bent piece part, 12... Bent part,
13...Insertion hole, 14...Lock piece, 14a...
Convex portion, 18...Terminal storage section, 18a...Back surface, 1
8c...Engagement groove, 19...Lead wire insertion hole, A...
…Lead.

Claims (1)

[Claims for Utility Model Registration] A bent piece is bent at a right angle to the front end of a metal base plate, an insertion hole through which a lead wire is inserted is provided in this bent part, and the bent piece is provided with an insertion hole through which a lead wire is inserted. a self-locking type connection terminal having a continuous locking piece part that is folded back toward the base plate at the tip and that clamps the lead wire inserted from the insertion hole between the base plate; In a terminal device comprising a terminal housing portion in which a connecting terminal is stored, and a terminal cover having a lead wire insertion hole opening at the back of the housing portion, the bent piece in the locking piece portion of the connecting terminal. A convex portion is provided protrudingly on the outer surface of the side portion of the locking portion, and an engagement groove in which the convex portion engages is formed on the inner surface of the terminal storage portion that the side portion of the bent piece portion of the locking piece portion comes into contact with. A terminal device characterized in that it is formed from the entrance of the storage section toward the back side.