JPS6412066B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a self-locking terminal device that facilitates the connection of electric wires.

[Technical background of the invention]

As known from Utility Model Publication No. 54-23195,
Focusing on the fact that a self-locking terminal device is useful for saving labor in assembly, the present applicant has developed a fluorescent lamp socket in which a self-locking terminal is constructed using an elastic contact body made of clad material. Already developed by.

The self-locking terminal device of this fluorescent light socket is
As shown in FIG. 1, it is equipped with a locking piece 1 obtained by bending a part of an elastic contact body made of clad material, and a clamping surface 2 that opposes this, and there is a lead wire difference (not shown) between them. It is designed to hold the core wire 3 of the lead wire inserted through the insertion hole. The tip of the locking piece 1 is provided with a recessed portion 4 of a copper conductor layer 1b that covers the stainless steel base material layer 1a that provides the spring properties of the elastic contact body, and this recessed portion 4 is connected to the core wire 3. It has a structure that allows it to penetrate into the body.

[Problems with background technology]

However, since it has the recessed portion 4, the end surface 5
The corner 6 formed by the surface 1b' of the conductor layer 1b is rounded, and the angle θ between the end surface 5 and the tip of the conductor layer 1b is 90° or more.

For this reason, the depth l at which the corner portion 6 smooths or scrapes the core wire 3 as the core wire 3 is inserted is small, and the depth l of the locking piece 1 biting into the core wire 3 when the lead wire is pulled back, and the depth l due to the biting. It was found that the size of the bulging portion 7 was also small, and a gap g equal to the distance it was pulled back was created. From this, the first
Electrical contact between the conductor layer 1b and the core wire 3a can be obtained in the range H in the figure, but when a large pullback force is applied to the lead wire, this lead wire tends to come off easily, making it impossible to maintain electrical contact. There is a risk that it will disappear.

[Purpose of the invention]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a self-locking terminal device that can prevent the lead wire from coming off and further improve the reliability of electrical contact.

[Summary of the invention]

The self-locking terminal device of the present invention includes an elastic contact body in which a part of the locking piece facing the clamping surface is bent.
The contact body is made of a clad material consisting of a base material layer that has spring properties and a conductor layer that is adhered to one side of this base material layer and is softer than the base material layer. It is provided facing the lead wire insertion hole of the storage body that houses the contact body, and the angle between the end face on the tip side of the locking piece and the surface of the conductor layer is formed into an acute angle, and the locking piece on the tip side The conductor layer is characterized in that the angle between the end face of the conductor layer and the tip of the conductor layer is 90° or less.

According to the self-locking terminal device having this feature,
By inserting the lead wire into the lead wire insertion hole of the storage body, the core wire can be clamped between the locking piece and the clamping surface. Since the corner on the front end side of the locking piece is acute-angled, the depth at which the core wire is leveled or scraped can be increased by this corner when the lead wire is inserted. At the same time, since the angle between the end face of the locking piece and the tip of the conductor layer is 90 degrees or less, this, together with the above-mentioned acute angle, prevents the lead wire from digging into the core wire when it is pulled back. This is done deeply, and a large bulge can be formed due to the escape of the material from the biting part. Therefore, the lead wire can be prevented from coming off due to the large bite and bulging portion described above, and the deep bite increases the electrical and mechanical contact area of the locking piece to the core wire, improving the reliability of the contact. You can improve.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 2 to 9.

In the figure, reference numeral 11 denotes an elastic contact body, which consists of a base material layer 12 that has spring properties, and a conductor layer 13 that is softer than the base material layer 12 and is attached to one surface of this base material layer 12 and is responsible for electrical contact. It is obtained by punching out a clad material composed of, for example, using a press machine. In the clad material, the base material layer 12 is a Be-Cu alloy and the conductor layer 13 is Cu.
A cladding material for a contact spring in which the base material layer 12 is stainless steel and the conductor layer 13 is Cu,
Base material layer 12 is phosphor bronze, conductor layer 13 is Cu contact spring clad material, base material layer 12 is Be-Cu alloy,
Or the conductor layer 13 is made of Cu-Zn alloy or phosphor bronze.
A contact spring cladding material made of Ag can be used. In addition, in this example, the base material layer 12 has a thickness of 0.44 mm.
The conductor layer 13 is made of stainless steel with a thickness of 0.06 mm.
This is the case when Cu (including Cu alloy) clad material is used.

This clad material is punched using a press machine,
As shown in FIG. 7, the base material layer 12 is positioned on the die A side, and punching is performed with a punch B in the direction of the arrow.

The elastic contact body 11 has a pin contact portion 15 at one end, and a locking piece 16 is formed by bending at the other end. Furthermore, in the case of this embodiment, the elastic contact body 11 is connected to the pin contact portion 15 and the locking piece 1 as shown in FIG.
A horizontal portion 17 is formed between the horizontal portion 17 and the projecting edge 18 is provided on both sides of the horizontal portion 17.
It has a structure in which both sides of an elastically deformable portion 19 connecting the pin contact portion 15 and the pin contact portion 15 are appropriately cut out. Notch 2
0 is the above part 19 when supporting a fluorescent lamp
This is provided as necessary to adjust the delicate elastic force of the fluorescent lamp, that is, the holding force of the fluorescent lamp. In this embodiment, the elastic contact body 11 has a pair of locking pieces 16, one of which is for connection to a lead wire, and the other is for connection to an adjacent socket when the fluorescent light fixture is for two lamps. It has come to be used for connecting transmission wiring.

As shown in FIGS. 8a or 8b and FIG. 9, the corner 14 formed between the end surface 16a of the locking piece 16 on the distal end side and the surface 13a of the conductor layer 13 is formed into an acute angle. Further, the angle θ between the end surface 16a and the tip of the conductor layer 13 is set to 90° or less. These corners 14 and angle θ
can be obtained by press processing using the above-mentioned press device, and 12a is the above-mentioned end surface 1 of the base material layer 12.
6a is shown. The present invention also includes a case where the base material layer 12 does not have a recessed portion, and therefore the above-mentioned angle θ is exactly 90°.

Further, 21 is a socket body made of synthetic resin that forms a storage body together with a cover to be described later, and the pair of elastic contact bodies 11 are housed inside this socket body. The rear surface of this main body 21 is open, and the front surface is equipped with an actuating plate 23 having a pin insertion hole 22, and an unlocking hole 25 into which a lead wire insertion port 24 and a lock release tool can be inserted. is provided.
In this embodiment, four lead wire insertion ports 24 are formed to enable feeding wiring, and two unlock holes 25 are formed so as to span two adjacent lead wire insertion ports 24. . Further, inside the socket body 21, there is a clamping surface 2 that clamps the lead wire C inserted into the lead wire insertion port 24 between the locking piece 16 and the lead wire C inserted into the lead wire insertion port 24.
6 is formed. In this embodiment, the clamping surface 26 is formed of a grooved inner surface having a semicircular cross section. In addition, the lock piece 16 of the elastic contact body 11 explained above,
The lead wire insertion port 24 and the clamping surface 26 constitute a self-locking terminal device. Furthermore, a husband attachment groove 27 is formed in the side wall and central partition wall of the socket body 21. In the figure, 28 is a guide rib that guides the movement of the actuating plate 23, 29 is a mounting groove for the fluorescent lamp on the chassis side, and 30 is a connecting hole.

The elastic contact body 1 is connected to this socket body 21.
1 is inserted from the rear opening of the socket main body 21, and is housed and supported within the main body 21 by fitting the protrusion 18 into the mounting groove 27. Due to this storage, the pin contact portion 15 of the elastic contact body 11 is arranged to block the pin insertion port 22, and the locking piece 16 is arranged to face the clamping surface 26 and the lead wire insertion port 24. Moreover, the horizontal portion of the lock piece 16 is arranged to face the release hole 25.

The rear opening of the socket body 21 is covered with a cover 31 made of synthetic resin. This cover 3
1 is integrally provided with a presser protrusion 32 that presses the end surface of the cover 31 side of the projecting edge 18, and also provides elastic contact when the unlocking tool is inserted into the unlocking hole 25. Rib 33 for preventing sagging due to deformation of the body 11 (see the two-dot chain line in FIG. 4)
are integrally protruded. Further, the cover 31 is provided with a connecting hole opposite to the connecting hole 30, and a connecting member 34 such as a rivet passing through both of these holes allows
The socket main body 21 and the cover 31 are connected.

To assemble the socket having the above structure, first insert and assemble the actuating plate 23 through the rear opening of the socket main body 21, and then insert the elastic contact body 11 through the rear opening so that its conductor layer 13 is located at the front. Next, fit the cover 31 into the rear opening of the socket body 21, and finally insert the connector 34 from the cover 31 side and swage the connector 34 to connect the socket body 21 and cover 31. Concatenate. Assembly is now complete.

With this assembly, the elastic contact body 11 can be restrained from moving vertically and horizontally by fitting the projecting edge 18 with the mounting groove 27, and the elastic contact body 11 can be restrained from moving vertically and horizontally by fitting the projecting edge 18 with the mounting groove 27.
The movement in the front and back direction can be suppressed by engagement with the rear end of the presser foot 32 and the presser protrusion 32. In addition, since the assembly direction of each component to the socket main body 21 is unified in one direction as described above, the number of components can be reduced due to the use of cladding material, and assembly can be made easier. Preferable for automatic assembly.

To connect the lead wire C to the socket, it is sufficient to simply insert the core wire D into the lead wire insertion port 24. Then, since the core wire D passing through the lead wire insertion port 24 pushes the locking piece 16 while being guided by the clamping surface 26 and passes through this locking piece 16, when the lead wire C is returned next time, lock piece 1
6 bites into the core wire D, and the lead wire C is locked.

In this case, since the corner 14 of the locking piece 16 is acute-angled, when the core wire D passes through the locking piece 16, the depth at which the core wire D is scraped off by the corner 14 as shown in FIG. , or the leveled depth L is larger than in the past. After this state, the lead wire C is pulled by some force to confirm locking or in a subsequent process. Then, since the angle θ of the locking piece 16 is 90° or less, the end face of the hard base material layer 12 presses the soft core wire D of the lead wire C, so the corner 14 has an acute angle shape. At the same time, the corner portion 14 digs deeper into the core wire D, and the material in the cut-in portion comes into contact with the end surface of the base material layer 12 to form a large bulging portion E (see FIG. 9). Therefore, not only is the biting depth increased, but also a large bulge E is obtained, which prevents the lead wire C from coming off. and,
By obtaining the deep bite described above, the conductor layer 13 and the core wire D can be brought into contact with each other in the range F in FIG. 9, so that a large contact area can be secured. Moreover, deep bite and large bulging part E
As a result, it is possible to obtain a mechanical contact surface between the locking piece 16 and the core wire D over a large range G in FIG. 9. In other words, the reliability of contact is improved by increasing the electrical and mechanical contact area.

In addition, in order to remove the lead wire C from the locking piece 16, it is sufficient to insert a screwdriver or the like into the unlocking hole 25 and elastically deform the locking piece 16 away from the clamping surface 26. To support the shaped fluorescent lamp, a lamp pin may be inserted into the pin insertion hole 22 as in the conventional case.

Further, although the above embodiment is a case in which the present invention is implemented in a fluorescent lamp socket, the present invention may also be implemented in a self-locking terminal device of a terminal block as illustrated in FIGS. 10 to 12. good. In other words, 4 in Figure 10
1 is a synthetic resin terminal block body that serves as a storage body.
It is formed by connecting a pair of main body constituent members 41a, 41a with a connecting member 42 such as a rivet. The main body 41 is provided with, for example, two sets of lead wire insertion holes 24, and a clamping surface 26 that is connected to the holes 24, respectively. In the main body 41, an elastic contact body 11 is inserted into the lead wire insertion hole 2.
It is located between 4 and 24. The elastic contact body 11 is made of a clad material consisting of a base material layer 12 and a conductor layer 13 as in the above embodiment, and both left and right ends thereof are bent to form a locking piece 16 facing the clamping surface 26. . The tip end corner 14 of this locking piece 16 is acute-angled, and the angle θ between the end surface 16a and the conductor layer 13 is formed to be 90° or less. In this terminal block as well, the intended purpose of the present invention can be achieved for the same reason as already stated in the description of the above embodiment.

In implementing the present invention, the specific structure, shape, position, and material of the storage body, lead wire insertion hole, clamping surface, elastic contact body, locking piece, base material layer, conductor layer, etc. It goes without saying that the present invention is not limited to the above-mentioned embodiments and can be implemented in various ways as long as it does not go against the gist of the present invention.

〔Effect of the invention〕

Since the present invention described above has the structure described in the claims above, it is possible to improve the ability of the elastic contact body made of clad material to bite into the lead wire of the locking piece, and also to obtain a large bulging portion. This has the effect of preventing the lead wire from coming off and further improving the reliability of electrical contact.

[Brief explanation of drawings]

Figure 1 is a sectional view showing a conventional example, Figures 2 to 9
The figure shows one embodiment of the present invention, and FIG. 2 is a front view;
Figure 3 is a sectional view taken along the line in Figure 1, Figure 4 is a partially enlarged sectional view, Figure 5 is a sectional view of the socket body along the line in Figure 4, and Figure 6 is an elastic contact. FIG. 7 is a cross-sectional view of a part of a press device showing a method of punching out an elastic contact body; FIGS. 8 a and b are cross-sectional views showing enlarged ends of different locking pieces;
FIG. 9 is an enlarged view of the middle part of FIG. 4. 10 to 12 show other embodiments of the present invention, and the first
Figure 0 is a partially sectional plan view of the terminal block, Figure 11 is a cross-sectional view of the elastic contact body, and Figure 12 is XII in Figure 11.
FIG. 11... Elastic contact body, 12... Base material layer, 13...
...Conductor layer, 13a...Surface of conductor layer, 14...Corner, θ...Angle, 16...Lock piece, 16a...End face of lock piece, 21...Storage body (socket body),
24... Lead wire insertion port, 26... Clamping surface, 41
...Hot storage (terminal block body), C...Lead wire, D
...Core wire, E...bulging part.

Claims (1)

[Claims] 1. A lead wire insertion hole 24 is provided in a storage body made of an insulating material that houses the elastic contact body 11, and a clamping surface 26 is formed to face the locking piece 16 bent and formed on the elastic contact body 11. In the self-locking terminal device in which the core wire D of the lead wire C inserted into the lead wire insertion hole 24 is clamped between the locking piece 16 and the clamping surface 26, the base material layer 12 has a spring property.
The elastic contact body 11 is formed of a clad material consisting of a conductor layer 13 which is adhered to one surface of the base material layer 12 and is softer than the base material layer. The above lead wire insertion hole 2
The corner 14 formed by the end face 16a on the distal end side of the locking piece 16 and the surface 13a of the conductor layer 13 is formed into an acute angle, and the locking piece A self-locking terminal device characterized in that the angle θ formed between the end face 16a on the tip side and the tip of the conductor layer 13 is 90° or less.