JPH0454698Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a type of terminal block that connects the plug-in terminals of a printed circuit board or a connector set terminal block.

(Prior Art) Conventionally, in this type of terminal block, a terminal fitting 7' having an elastic pressing leg 6' is attached to each terminal section 2' of an insulating base 1' as shown in Figure 12. ing. The terminal fitting 7' is formed by punching out and bending a conductive thin plate using a press, and also connects the printed circuit board to the contact portions 6b', 6b' of the elastic pressing legs 6', 6'.
A spacing 1 is formed that is slightly narrower than the wall thickness of , and a spacing 1' is formed between the ends 6a' and 6a'.

(Problem to be solved by the invention) A plurality of terminal fittings are attached to one terminal block, and it is difficult to make the above-mentioned intervals l and l' of all the terminal fittings constant. It is difficult to form the parts L with equal distances from the center on the left and right sides, and it becomes more difficult as the distance increases. In addition, the terminal fittings may be deformed during storage and transportation, and when fixing the terminal fittings to each terminal section, the position of the elastic pressing leg 6' may be misaligned, or the distances l and l' may be Sometimes the end 6a' of the elastic pressing leg 6' is located in the insertion groove 4' of the leg accommodating part 3' as shown in FIG. 12. In the above-mentioned state, when the printed circuit board P or the plug-in terminal of the connector type terminal block is inserted into the plug-in groove 4', the end portion 6a' is inconveniently bent as shown by the chain line. In addition, since the spacing l is uneven, the contact force of the elastic contact legs 6', 6' with respect to the printed circuit board P etc. differs for each terminal fitting 7'. It may not be possible to insert it or, conversely, the distance l may be too large and there may be no contact. For example thickness 1.6
When holding a printed circuit board with a diameter of mm, the distance l is
1.0 mm, and each terminal fitting 7' is installed at an accurate position in each terminal section 2' so as not to cause center deviation, and when the printed circuit board P is inserted, each contact part 6b' is evenly opened by 0.3 mm. It is extremely difficult to make ballistic contact.

(Means for solving the problems) This idea solves these inconveniences.
That is, the insulating base 1 is provided with the leg accommodating part 3, the upper and lower through holes 21 are provided in each terminal section 2 of the insulating base 1, and the upper and lower through holes 21 are communicated with the accommodating space 3' of the leg accommodating part 3. An insertion groove 4 is formed in the lower plate 39 of the housing part 3, and chevron-shaped expansion guides 5, 5 facing each other are formed upward from the opening edge 4a of the insertion groove 4, and the conductive thin plate is bent to form an upper plate. 60, front and rear plates 61,6
1, and elastic pressing legs 6, 6 extending from the front and rear plates 61, 61 are formed, saw teeth 63, 63 are formed on both side edges of the front and rear plates 61, 61, and a pair of elastic pressing legs 6, 6 are formed.
6 inwardly to form contact portions 6b, 6b.
The top portions 50, 50 of the expansion guides 5, 5 which are close to each other and the distance M between the end portions 6a, 6a are opposed to each other.
The terminal fittings 7 are formed with a spacing slightly larger than the spacing d, and the terminal fittings 7 are press-fitted into the accommodation space 3' through the upper and lower through holes 21, and the sawteeth 63, 63 are attached to the insulating base 1.
This feature is characterized in that the end portions 6a, 6a are expanded and locked by expansion guides 5, 5.

(Example) An example of this invention will be described with reference to FIGS. 1 to 11. A large number of partition walls 8, 8, 8, .
4, and step portions 23 and 24 as shown in the second and seventh figures.
Metal fitting insertion grooves 25, 25 are formed in the front and rear of the fifth
6 As shown in the figure, from the bottom plate 10 of the insulating base 1, there are four locking claw legs 26, 26, 2 in the front, back, left and right for each section.
6, 26 are provided protrudingly, and the bottom plate 1 is installed as shown in Figures 1 and 6.
A pair of fitting grooves 27, 27 are formed in each section of the protrusions 11, 12 protruding from the front and rear edges of 0. Then, the insulating base 1 is cut according to the desired number of sections, the sections at both ends are made into end sections 20, 20, the other sections are made into terminal sections 2, 2, 2...
The locking claw legs 26, 26, 26, 26 are removed from 0,20.

On the other hand, apart from the insulating base 1, a plurality of intermediate blocks 30, 30, 30... and a pair of end blocks 31, 31 are each formed of an insulating material, and these intermediate blocks 30, 30, 30... . . . the end blocks 31, 31 form the leg accommodating portion 3.
As shown in FIG. 9, each intermediate block 30 is formed into a box shape, and a pair of fitting pieces 33,
33, a pair of window holes 36, 36 are formed in the front and rear plates 34, 35, respectively, and the left and right side plates 37, 38 are provided with a pair of window holes 36, 36, respectively.
And the insertion terminal (not shown) of the printed circuit board P or connector type terminal block to the bottom plate 39 shown in the second diagram.
In addition, each end block 31 is inserted into the front and rear plates 34, 3 as shown in FIG.
5. It is formed of an outward side plate 32 and a bottom plate 39, and has a pair of fitting pieces 33, 33 protruding from the front and back of the upper edge of the end block 31, respectively, and a pair of window holes 36, respectively, in the front and rear plates 34, 35. 36 is formed, and an insertion groove 4 is formed in the bottom plate 39. Then, as shown in the second figure, the opening edge 4a of each insertion groove 4 is expanded diagonally, and the opening edge 4a
That is, the chevron-shaped expansion guides 5 are provided upward from each inner end 39' of the bottom plate 39 and protrude outward from the insertion groove 4.

Further, as shown in FIG. 4, a conductive thin plate is punched out with a press and bent to form the terminal fitting 7.
0, front and rear plates 61, 61 and elastic pressing legs 6, 6 extending from the front and rear plates 61, 61 are formed;
A screw insertion hole 62 is formed in the front and rear plates 61, 61.
Saw teeth 63, 63 are formed on both side edges of the , and the pair of elastic pressing legs 6, 6 are bent inward to bring the contact portions 6b, 6b close to each other as shown by the chain lines in FIG. The distance M is slightly larger than the distance d between the tops 50, 50 of the opposing expansion guides 5, 5, and a slit 64 is formed in each elastic pressing leg 6.

In the figure, reference numeral 9 is a nut, 90 is a connection screw, and 91 is a washer.

Furthermore, reference numeral 71 in the eighth figure is a mounting bracket for a mounting screw (not shown), and the upper surface plate 7 of the U-shaped piece
A screw insertion hole 73 is formed in the front and rear plates 74 and 75.
Serrations 76, 76 shown in the first figure are formed on both side edges of the nut 9, and the reference numeral 71' is a hexagonal piece having a screw insertion hole 73' and having the same external shape as the nut 9, and as shown in the eleventh figure. A bottom plate 77 is formed of an insulating material, screw insertion holes 78 are formed in the bottom plate 77,
A pair of fitting pieces 7 are provided from the front and rear edges of the bottom plate 77, respectively.
9,79 is installed protrudingly.

This embodiment is assembled as follows.
Each fitting piece 79 of the bottom plate 77 is fitted into each fitting groove 27 of the end sections 20, 20, and the claw portion 26a of each locking claw leg 26 of the terminal section 2 adjacent to each end section 20 is fitted.
At the same time as engaging each window hole 36 of the end block 31, each fitting piece 3 is inserted into each fitting groove 27 of the terminal section 2.
3 to fix each end block 31, and in the same manner to the other terminal sections 2, 2, 2, . 36 and each fitting piece 33 is fitted into each fitting groove 27 to fix each intermediate block 30. On the other hand, attach the nut 9 to the front and rear plates 6 of the terminal fitting 7.
1, 61 and insert each terminal fitting 7 into each upper and lower through hole 2.
1, and the nut 9 is engaged with the stepped portion 23. At this time, the front and rear plates 61, 61 of the terminal fitting 7 are inserted into the fitting insertion grooves 25, 25 and press-fitted to stick the saw teeth 63, 63 into the groove walls 25a, 25a. Note that when the terminal fitting 7 is inserted into the upper and lower through-holes 21, the contact portion 6 is closed as shown by the chain line in FIG.
b and 6b are close to each other, but the ends 6a and 6a meet the tops 50 and 50 of the expansion guides 5 and 5 due to the press-fitting of the terminal fitting 7. Therefore, if the press-fitting continues, the ends 6a, 6a will be expanded outward by the expansion guides 5, 5, and will be positioned outside the insertion groove 4 as shown by the solid line in FIG. 6b,6
b are positioned in the insertion groove 4 with a spacing slightly narrower than the thickness of the printed circuit board P. After fixing each terminal fitting 7 and nut 9 in this way, insert the washer 91 onto the connection screw 90 and tighten the connection screw 90.
is inserted into the screw insertion hole 62 of the terminal fitting 7 and screwed onto the nut 9. Also, attach each hexagonal piece 71' in the same way as the nut 9, and
4, 75 into the metal fitting insertion grooves 25, 2 of the corner end section 20.
5 and press-fit the saw teeth 76, 76 to the groove walls 25a, 25a.

(Effects of the invention) According to this invention, there is no inconvenience such as the end of the elastic pressing leg of the terminal fitting entering the insertion groove and being bent by the printed circuit board or plug terminal, and the printed circuit board or plug terminal can be easily bent. In addition, in this invention, the contact parts of the elastic pressing legs of the terminal fitting are brought close to each other in advance, and then the ends are opened and locked by the expansion guide, so when forming the terminal fitting, It does not require high precision and can be manufactured very easily.
Moreover, when the elastic pressing leg is locked to the expansion guide by press-fitting the terminal fitting, the elastic pressing leg is in a fixed position, so the elastic contact force at the contact part is uniform and problems such as poor contact do not occur. ,
To be able to correct deformations that occur during manufacturing, storage, transportation, and assembly of terminal fittings, to provide a good terminal block, and to fix terminal fittings and place elastic pressing legs in accurate positions simply by press-fitting the terminal fittings. is possible,
In other words, the terminal fitting can be attached easily, quickly and reliably.

(Effects of the embodiment) As in the embodiment, the insulating base 1 and the leg accommodating part 3 are formed separately, and the leg accommodating part 3 is formed by a plurality of intermediate blocks 30, 30, 30... and a pair of ends. an insertion groove 4 is formed in each intermediate block 30 and each end block 31; an outer side plate 32 is formed in each end block 31; Attach the intermediate block 30 and connect the end block 3 to the terminal sections 2, 2 at both ends.
1 and 31, even if an insulating base with a large number of sections formed in advance is cut into the desired sections, the corresponding number of intermediate blocks and a pair of end blocks can be attached. This is effective because a desired terminal block can be obtained, and there is no waste in forming many types of insulating bases with different numbers of sections and many types of leg accommodating parts.

[Brief explanation of drawings]

Figures 1 to 11 show an embodiment of this invention. Figure 1 is a partially cutaway front view with some parts removed, Figure 2 is an enlarged sectional view taken along line A-A, and Figure 3 is an enlarged cross-sectional view taken along line B- B
4 is an enlarged perspective view of the terminal fitting used in the above embodiment, FIG. 5 is an enlarged sectional view taken along the line C-C, FIG. 6 is a bottom view with some parts removed, and FIG. 7 is an enlarged perspective view of the terminal fitting used in the above embodiment. Partial plan view with some parts removed, Figure 8 is D-D
FIG. 9 is an enlarged perspective view of the intermediate block used in the embodiment, FIG. 10 is an enlarged perspective view of the upper end block, FIG. 11 is an enlarged perspective view of the upper bottom plate, and FIG. 12 is the conventional one. FIG. 3 is an example cross-sectional view. DESCRIPTION OF SYMBOLS 1... Insulating base, 2... Terminal section, 3... Leg accommodating part, 3'... Accommodating space, 4... Insertion groove, 4a...
...Opening edge, 5... Expansion guide, 6... Elastic pressing leg, 6a... End, 6b... Contact part, 7... Terminal fitting, 21... Upper and lower through holes, 39... Bottom plate, 50
...Top part, 60...Top plate, 61...Front and rear plates, 6
3... Sawtooth, M, d... Interval.

Claims (1)

[Scope of utility model registration request] A leg accommodating part 3 is provided in the insulating base 1, a vertical through hole 21 is provided in each terminal section 2 of the insulating base 1, and the vertical through hole 21 is communicated with the accommodating space 3' of the leg accommodating part 3,
An insertion groove 4 is formed in the bottom plate 39 of the leg accommodating part 3, and chevron-shaped expansion guides 5, 5 facing each other are formed upward from the opening edge 4a of the insertion groove 4, and the conductive thin plate is bent to form the top plate. 60, front and rear plates 61, 61 and elastic pressing legs 6, 6 extending from the front and rear plates 61, 61;
, and saw teeth 6 are formed on both side edges of the front and rear plates 61, 61.
3, 63, and each of the pair of elastic pressing legs 6, 6 is bent inward to bring the contact portions 6b, 6b close to each other, and the end portions 6a, 6a are spaced apart from each other by a distance M. The terminal fitting 7 is formed with a spacing slightly larger than the distance d between the top parts 50, 50 of the terminal fitting 7, and the terminal fitting 7 is further press-fitted into the accommodation space 3' through the upper and lower through holes 21, and the saw teeth 63, 63 are attached to the insulating base 1. At the same time as sticking, the ends 6a, 6a are expanded by the guide 5,
A terminal block characterized by expanding and locking at 5.