JPH0210547B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connection terminal used for electrically connecting and mechanically fixing wires in communal reception equipment and other electronic equipment.

In conventional connection terminals, a holding plate facing the board is moved close to the board by rotating a threaded rod connecting the two, and the electric wire is clamped between the two. There was a drawback that if the screw rod was turned too far in the opposite direction by mistake, the presser plate would separate from the board. In order to solve this problem, attempts have been made to add various configurations, but the addition of such configurations has the drawback of significantly impairing workability when assembling the terminal.

SUMMARY OF THE INVENTION The present invention has been made to eliminate the above-mentioned drawbacks, and seeks to provide a connection terminal that can be assembled with a simple assembly process, and can also be used to prevent the presser plate from coming off. It is something to do.

The drawings showing the embodiments of the present application will be described below. Reference numeral 1 denotes a plate body made of an insulating material, and one side (sometimes both sides) thereof is integrally provided with a circuit conductor formed of copper foil. Such a device is generally called a printed circuit board.
Reference numeral 2 denotes various electronic circuit elements attached to this plate 1, which are soldered to the circuit conductors of the plate 1 to constitute an electronic circuit of an electronic device (for example, an intercom, an alarm device). . 3, 3 are through holes provided in the plate body 1, and 4, 4 are fastening holes provided on both sides of the through hole 3. Reference numeral 5 indicates a connection terminal attached to the plate 1.

Next, this connection terminal 5 will be explained in detail.
The main body 7 is formed by press-molding a conductive material having elasticity (for example, steel, stainless steel, etc.). In this main body 7, 8
is a board, 9, 9 are fixing legs provided on both sides of the board, which are passed through the fixing holes 4, 4, and their tips are twisted and fixed to the fixing holes 4, 4. It is also electrically connected to the circuit conductor of the plate body 1. Reference numeral 10 denotes a through hole provided in the center of the substrate 8, which is a screw hole. Numerals 11 and 11 are a pair of wall plates erected on both sides of the base 8, and 12 is a guide portion, which is formed by cutting out a rectangular central portion of the wall plates. Reference numerals 13 and 13 denote introduction portions provided at the free ends of the wall plates, and the opposing portions are formed so as to open toward each other. Next, 16 indicates a presser body. In this presser body 16, reference numeral 17 denotes a presser plate, which is disposed opposite to the substrate 8 so as to be movable near and far. Further, the holding plate 17 is made of a conductive metal material (for example, copper, steel, stainless steel). Reference numerals 18 and 18 designate engaging portions that protrude from the edges of the presser plate 17 on the sides corresponding to the pair of wall plates 11 and 11, respectively. 19 is a through hole provided in the center of the holding plate 17. 20 indicates a well-known threaded rod. 21 is the head, 22 is the screw part, and the through hole 10
It is screwed together. 23 is the head 21 and the screw part 22
An unthreaded neck located between. The outer diameter of the neck portion 23 is formed to be somewhat smaller than the outer diameter of the threaded portion 22 and the inner diameter of the through hole 19, and is rotatably fitted into the through hole 19.

When connecting and fixing a well-known electric wire 25 (for example, a core wire of a coaxial cable, a core wire of a feeder, a lead wire, etc.) to the connection terminal 5 having the above configuration, first
The coating on the tip of the conductor portion 26 is removed to expose the conductor portion 26. The conductor portion 26 is placed on the substrate 8 as shown in FIGS. 3 and 4, A and B, and the threaded rod 20 is rotated. At this time, the engaging parts 18, 18 are guided by the guide parts 12, 12, and thereby the holding plate 17
moves toward the substrate 8, and the lower surface of the holding plate 17 comes into contact with the conductor portion 26. When the threaded rod 20 is further rotated, the presser plate 17 is rotated as shown in FIG.
The conductor portion 26 is clamped and fixed between the substrate 8 and the substrate 8.
Thereby, the electrical connection between the conductor portion 26 and the substrate 8 is maintained firmly. In this state, the electric wire 25 is in a good electrical connection with the circuit conductor of the plate 1.

Next, the process of assembling this connection terminal 5 will be explained. First, insert the fixing legs 9, 9 of the main body 7 into the fixing holes 4, 4 of the plate body 1, and
Twist the part protruding from the fixing hole 4. As a result, the retaining legs 9, 9 will not come out of the retaining holes 4, 4, and the main body 7 will be fixed to the plate 1. Further, the exposed portions of the fixing legs 9, 9 from the fixing holes 4, 4 come into contact with the circuit conductor of the plate body 1 due to being twisted.
Connect electrically. Note that this part may be further soldered if necessary. Next, as shown in FIG.
The presser plate 17 is positioned so that 18 corresponds to the introduction parts 13, 13. When the threaded rod 20 is rotated in this state, the engaging parts 18, 18 are guided to the introduction parts 13, 13, as shown in FIG. It moves toward the substrate 8 side while pushing it open. Furthermore, threaded rod 20
When the is rotated, the engaging parts 18, 18 enter into the guide parts 12, 12, as shown in FIG.
The wall plates 11, 11 return to their original state (not pushed open) due to their elasticity. In the above process, since the engaging part 18 is formed relatively wide and the entire wide tip part 18a comes into contact with the introduction part 13, the presser plate 17 can be rotated even when the threaded rod 20 is turned. Nothing happens. In this way, the engaging portion 1
8 and 18 are in the guide portions 12 and 12, even if the threaded rod 20 is rotated, the presser plate 17
does not rotate and is in a state where it can move only in the direction determined by the guide parts 12, 12, that is, in the direction of distance from and near the substrate 8.

Note that in this state, the presser plate 17 is attached to the substrate 8.
Even if the threaded rod 20 is rotated in the direction away from the
Since the engaging parts 18, 18 are inserted into the guide parts 12, 12, the holding plate 17 is prevented from separating from the base plate 8 by a predetermined distance or more, and the holding plate 17 is prevented from separating from the base plate 8 by a predetermined distance or more.
It will never go outside from between 1.

Alternatively, instead of the above assembly procedure, first connect the presser body 16 to the main body 7 in the same manner as above to assemble the connecting terminal 5, and then fix the connecting terminal 5 to the plate 1. It's okay.

Next, FIGS. 6 to 9 showing different embodiments of the present application will be described. This embodiment shows an example in which a tapping screw with a threaded portion 22e tapered at the tip is used as the threaded rod 20e, and the through hole 10e is formed in advance without a screw.

When using the above configuration, the threaded rod 20e
The tip of the screw rod 20e is passed through the through hole 10e as shown in FIG. 6A, and the threaded rod 20e is rotated. Due to this rotation, the threaded rod 20e advances downward in FIG. 6 while cutting a thread into the through hole 10e. Furthermore, threaded rod 2
When Oe is rotated, the edge of the through hole 10e is bent downward little by little as shown in FIGS. 6B and 6C, and a thread is cut inside the hole 10e. In this process, the presser plate 17e
1e and 11e, and as shown in FIG.
2e.

In this case, a threaded rod 20e as shown in FIG. 7A is used as the tapping screw, but a well-known type 3 grooved tapping screw as shown in FIG. 7B may also be used.

FIG. 8 shows an embodiment in which the substrate 8e of the main body 7e in the embodiment of FIG. 6 is thin (for example, about 0.6 mm for a thin plate). In this case, as shown in FIG.
A well-known burring 27 is provided in the through hole 10e of e,
The burring 27 is left in the through hole 3e.

In the above configuration, the tip of the threaded rod 20e is inserted into the through hole 10e, and the threaded rod 20e is rotated. As a result, the inside of the bur ring 27 is also threaded together with the through hole 10e. Therefore, the screw portion becomes longer by the length of the burring 27, and the board 8e becomes able to withstand the strong force of screw tightening.

FIG. 9 shows the effects of the embodiment using the above-mentioned tapping screw. In this case, the distance between the fixing holes 4e, 4e is formed somewhat smaller than the distance between the two fixing legs 9e, 9e of the main body 7e.

In such a configuration, first, the electronic device element 2e is attached to the plate 1e in a well-known manner. Subsequently, the fixing legs 9e, 9e of the main body 7e are passed through the fixing holes 4e, 4e. At this time, the fixing holes 4e, 4e
Since the distance between is configured as above,
The fixing legs 9e, 9e cannot be removed from the fixing holes 4e, 4e, and the main body 7e is fixed to the plate body 1. The plate body 1e to which the electronic device element 2e and the main body 7e are attached in this way is placed in a solder bath, and they are soldered to the circuit conductor all at once. When the soldering is completed, the electronic device element 2 is connected as shown in FIG.
e and the fixing legs 9e, 9e are electrically and mechanically fixed to the circuit conductor of the plate 1 in good condition.
Moreover, at this time, the solder film 28 is simultaneously formed on the lower side of the through hole 3e. However, the threaded rod 20e
In the process of screwing the tip of the threaded rod 20e into the through hole 10e, the tip of the threaded rod 20e breaks through the solder film 28. Therefore, the presence of the solder film does not have any adverse effects.

Note that in FIGS. 6 to 9, parts that are functionally the same or equivalent to those in the previous figure are given the same reference numerals as in the previous figure with an alphanumeric letter "e", and redundant explanations are omitted. (Furthermore, in the following figures, the same idea is given and the redundant explanation is omitted by adding an alphanumeric letter f.) Next, FIGS. 10 to 14 showing further different embodiments of the present application will be described. In this embodiment, the engaging portions 1 are connected to each other from both ends of the edge of the presser plate 17f.
8f and 18f are protruded, while wall plates 11f and 1
Cut out both end edges of 1f to form guide parts 12f,
It is set to 12f.

As described above, in the present invention, the fixing legs 9 for the plate body 1 are provided protruding from one side, and the mounting surface 8a for mounting the electric wire is provided on the other surface, and furthermore, in the central part, A substrate 8 having a screw hole 10 formed therein; a holding plate 17 having a pressing surface 17a for pressing an electric wire and having a through hole 19 formed in the center thereof;
The neck portion 23 is rotatably inserted into the through hole 19 of the holding plate 17, and the threaded portion 22 is inserted into the pressing surface 17.
(b) When securing electric wires to the plate 1, it is necessary to attach the board to the plate 1. 8, the presser plate 17 is opposed to the base plate 8, and the presser plate 1 is fixed with the threaded rod 20.
By moving 7 close to the substrate 8, there is an effect that it can be used for fastening electric wires.

Moreover, in this invention, in addition to the above structure, engaging parts 18, 18 are provided protruding from both edges 17b, 17b of the presser plate 17, respectively, while two engaging parts 18, 18 are provided protruding from the mounting surface 8a of the board 8. wall board 1
1 and 11 are erected between each other with a distance between the edges of the holding plate where the engaging portions are protruded, and each of the wall plates 11 and 11 is provided with the engaging portions 18. Guide parts 12, 12 are provided for guiding in a direction perpendicular to the placing surface 8a, and the engaging part 18 is arranged at a predetermined distance from the substrate 8 at the end of the guiding part 12 on the side opposite to the placing surface. A stop portion 12a is provided to prevent separation by more than a distance, and a free end of each of the pair of wall plates 11, 11 is provided with a stop portion 12a so that the engaging portion can be introduced toward the guide portion. The introduction parts 13, 13 are provided in a mutually open-front shape, and both the engaging parts 18, 18 provided on the presser plate 17 are positioned between the two introduction parts 13, 13, and the threaded rod By screwing the tip of the threaded portion 20 into the screw hole 10 of the substrate, and further rotating the threaded rod 20 to advance the screwing, both the engaging portions 18, 18 are connected to both the introduction portions 1.
3 and 13 while elastically separating the wall plates 11 and 11 from each other through their introduction parts,
After that, both the engaging parts 18, 18 are connected to both the guiding parts 12,
12 respectively, and in a state where the engaging portions 18 are guided by the guide portions 12, the presser plate 17
Since it is configured to be able to freely move near and far with respect to the substrate 8, it has the effect of (a) above, and (b) when the presser plate 17 is combined with the substrate 8, a pair of walls By simply pushing the presser plate 17 between the plates 11, 11, the presser plate 17 can be positioned at a predetermined position between the wall plates 11, 11, and the engaging parts 18, 18 can be engaged with the guide parts 12, 12. There is an effect on the number of man-hours that can be achieved by doing both. This means that the presser plate 17 must be assembled in a predetermined manner and measures must be taken to prevent it from coming off in a single push-in operation (even if the screw rod 20 is turned in the opposite direction by mistake, the presser plate 17 will not be attached to both wall plates 11 and 17). , 11) can be carried out at the same time.

(c) Furthermore, due to the existence of the introduction parts 13 and 13,
When pushing the presser plate 17 between the walls 11, 11, the presser plate 17 can be pushed in simply by applying a pressing force toward the board 8 by turning the threaded rod 20, making the work easy. There are also effects above.

[Brief explanation of drawings]

The drawings show examples of the present application, and Fig. 1 is a perspective view showing an example of how the connection terminal is used in an electronic device, Fig. 2 is an exploded perspective view of the connection terminal, and Fig. 3 is a diagram showing how to connect electric wires to the connection terminal. Perspective view showing the state when connected, No. 4
The figure is a diagram explaining the process of connecting electric wires (a sectional view at the - line position in Figure 3), and Figure 5 is a diagram explaining the assembly process of the connection terminal (the - line in Figure 3).
6 is a diagram similar to FIG. 5 showing a different embodiment; FIG. 7 is an enlarged view of the threaded rod;
Figure 8 is a diagram showing an example of forming a burring, Figure 9
The figure shows a state in which soldering is performed using a solder bath, and FIGS. 10 to 14 show further different embodiments. FIG. 10 is a perspective view, and FIG. 11 is a perspective view in a tightened state. , FIG. 12 is an exploded perspective view, FIG. 13 is a front view, and FIG. 14 is a side view. 5... Connection terminal, 7... Main body, 8... Board, 9
...Fixing leg, 10...Through hole, 11...Wall plate, 12
...Guidance part, 13...Introduction part, 17...Press plate,
18... Engaging portion, 20... Threaded rod, 23... Neck.

Claims (1)

[Claims] 1. A board with fixing legs protruding from one side and a mounting surface for placing electric wires on the other side, and a screw hole drilled in the center, and a board with which the electric wires can be placed. A presser plate having a pressing surface for pressing and having a through hole in the center thereof, and a neck rotatably inserted into the through hole of the presser plate and the screw portion pressed against the presser plate. In a connection terminal consisting of a threaded rod that protrudes from the surface side and has a screw head located on the opposite surface side, engaging portions are provided respectively protruding from both edges of the holding plate, while the mounting surface of the substrate From here, two wall plates are erected between each other with a distance between the edges of the holding plate with the engaging portions protruding therebetween, and each of the wall plates is provided with the engaging portions. A guide portion for guiding in a direction perpendicular to the placement surface is provided, and an end of the guide portion on the side opposite to the placement surface includes:
A stop portion is provided to prevent the engaging portion from moving away from the board by more than a predetermined distance, and a free end of each of the pair of wall plates is provided with a stop portion for preventing the engaging portion from moving away from the substrate by more than a predetermined distance. Introducing parts that can be introduced are provided in a mutually open-point shape, and both engaging parts provided on the presser plate are positioned between the two introducing parts, and the tip of the threaded part of the threaded rod is positioned between the two engaging parts provided on the presser plate. is screwed into the screw hole of the substrate, and by further rotating the threaded rod to advance the screwing, both the engaging parts are guided to the introducing parts and the two engaging parts are inserted through the introducing parts. The wall plates are elastically separated from each other, and then both of the engaging portions are engaged with both of the guide portions, and the holding plate is moved from a distance relative to the substrate while the engaging portion is guided by the guide portion. A connection terminal characterized in that it is configured to be movable.