JPH0373113B2 - - Google Patents

Abstract

PURPOSE:To connect a terminal pin at three positions to the printed board side at a high contact pressure by holding strongly the terminal pin, which is the central contact of a contact plug installed to an apparatus case by pressing in a holding piece of a screw device, with a feeder piece and a pair of feeder shafts connected to the feeder piece. CONSTITUTION:By pressing a holding piece 5 against a pair of springs 8 with a screw device 43, a pair of feeder shafts contacted to the holding piece 5 through a feeder piece 6 are guide by a guide device 44, compressing the springs 8 while narrowing the interval gradually, and contacted to the both side surfaces of the feeder piece 6 and the terminal pin 24. In this case, since the diameter of the feeder shafts 7 is larger than that of the terminal pin 24, the feeder shafts 7 contact the lower and side surface of the terminal pin 24, and the terminal pin 24 receives the depressing force of the feeder piece 6 and the upward component force of the pair of feeder shafts 7, denying the displacement substantially. And since the pressing forces in the three directions increase proportionally to the pressure to the holding piece 5, the contacts of the terminals can be connected securely with a high contact pressure.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a built-in printed circuit board for electronic equipment, such as CATV transmission equipment, with a terminal pin that is the center contact of a plug attached to a device case that houses the printed circuit board. The present invention relates to a terminal pin connection device for pressure contact connection.

[Conventional technology]

For example, as shown in FIG. 8, a signal terminal plug of a CATV transmission device is connected to a printed circuit board using a plug 5 attached to a side wall 52 of a device case 51.
A terminal pin 54, which is the center contact of the device 3, is connected to a printed circuit board 55 disposed inside the equipment case via a common conductor 56 by soldering 57, 58. What is shown in Figures 9 and 10 is
One flat plate part 64 of the L-shaped metal fitting 63 is protruded from the elongated hole 62 of the printed circuit board 61, and one end of the flat metal fitting 66 is inserted into the window hole 65 to form a latching part 67 protruding from one side of the one end. Hooked onto the flat plate part 64, this flat metal fitting 66 and another elongated hole 6 of the printed circuit board 61
The terminal pin 71 located between the flat plate part 70 and the printed circuit board 61 is connected to the printed circuit board 61 by tightening the other flat plate part 70 of the L-shaped metal fitting 63 with the screw 69 inserted in the terminal pin 8 . What is shown in FIGS. 11 and 12 is a case where the mounting position of the printed circuit board 81 of the equipment case 85 is in front of the terminal pin 83 of the connector 82, and the printed circuit board 81 is attached to the bifurcated contact fitting 84 attached to the back surface of the printed circuit board 81. After fitting into the terminal pin 83, it is attached to the device case 85.

[Problem that the invention seeks to solve]

However, what is shown in FIG.
Since the terminal pins 54 of each plug 53 are soldered to the connector 5, replacing the printed circuit board 55 becomes complicated. For example, CATV transmission equipment is attached to a telephone pole or a messenger wire 59 as shown in Figure 4, and the CATV transmission equipment is connected to each other by a signal transmission cable 60, so if an abnormality occurs in the equipment, the Since the printed circuit board is difficult to replace, the printed circuit board is replaced. At that time, each terminal pin 54 and the printed circuit board 55 must be attached and removed by soldering at a high place with poor footing, which is an inconvenient and complicated work. It was hot. What is shown in FIGS. 9 and 10 is a connection between the terminal pin 71 and the printed circuit board 6.
1, loosen the screw 69, then move the flat metal fitting 66 and L-shaped metal fitting 63 using the long holes 62 and 68 until the L-shaped metal fitting 63 comes off from the terminal pin 71, and, Since the printed circuit board 61 was connected to the terminal pin 71 in the reverse order, the terminal pin 71
In addition to screw operations, attaching and detaching the printed circuit board to and from the terminal pins 71 requires the troublesome operation of inserting and removing the L-shaped metal fittings 63 and the flat metal fittings 66 into and out of the terminal pins 71. Furthermore, since a gap is created between the elongated hole 62 and the flat plate part 64, the L-shaped fitting 63 is tilted when the screw 69 is tightened, and the terminal pin 71 is forced to escape to the side, making it impossible to obtain high contact pressure. . In the case shown in FIGS. 11 and 12, the two-pronged contact fitting 84 of the printed circuit board 81 is simply fitted onto the terminal pin 83, so a misalignment between the two-pronged contact fitting 84 and the terminal pin 83 may cause poor contact. Even if contact could be made without any deviation, the power supply capacity would be extremely small because the contact would be a line contact due to the elasticity of the bifurcated contact fittings 84.

The present invention has been made in view of the above-mentioned points, and provides a highly reliable terminal pin connection device for a printed circuit board that allows for easy replacement of the printed circuit board and that can reliably connect the plug and the printed circuit board with high contact pressure. For the purpose of providing.

[Means for solving problems]

The first configuration of the present invention to achieve this purpose is as follows.
This will be explained using FIGS.

A screw mechanism 43 and this screw mechanism 4 are attached to the housing 1.
3, a presser piece 5, a power supply piece 6, and a pair of power supply shafts 7, 7 are arranged to oppose each other with opposing springs 8, 8, and the power supply piece 6 has one end attached to a printed circuit board 27 that is attached to the housing 1.
The terminal pin 24 (with a smaller diameter than the power supply shaft) is connected to ) is formed in the insertion/removal direction of the printed circuit board 27, and the screw mechanism 43 allows the power supply piece 6 to abut against the terminal pin 24 located at a predetermined position in the notch hole 25. A guide mechanism 44 is provided in the housing 1 to guide the pair of power supply shafts 7, 7 so that the power supply shafts 7, 7 come into contact with the power supply piece 6 and the terminal pin 24, respectively.

[Effect]

When the presser piece 5 is not pressurized by the screw mechanism 43,
The holding piece 5, the power supply piece 6, and the pair of power supply shafts 7, 7 are pressed toward the screw mechanism 43 side by a pair of springs 8, 8, and are at a position away from the terminal pin 24 of the connector attached to the equipment case. be.

Here, when the presser piece 5 is pushed in against the pair of springs 8, 8 by the screw mechanism 43, the power supply piece 6 is pushed into the presser piece 5.
The pair of power supply shafts 7, 7 that come into contact with each other through the guide mechanism 44 are guided by the guide mechanism 44, and the gap between them is gradually narrowed while compressing the springs 8, 8, so that the power supply piece 6 is attached to the terminal pin 24 as shown in FIG. In the abutting state, it abuts both sides of the power feeding piece 6 and the terminal pin 24. In this case, since the feed shaft 7 has a larger diameter than the terminal pin 24, it comes into contact with the lower side surface of the terminal pin 24, and as a result, the terminal pin 24 is pushed down by the pressing force of the feed piece 6 and the pair of feed shafts 7, 7.
Since there is no substantial displacement due to the upward component force, and the pressing forces from these three directions increase in proportion to the pressing force on the holding piece 5, each terminal contact portion can be securely connected with high contact pressure. can be connected to. Therefore, the power supply capacity from the terminal pin 24 to the printed circuit board becomes large, and the reliability of the terminal contact portion can be improved.

When the pressure on the presser piece 5 is released by the screw mechanism 43, the presser piece 5, the power supply piece 6 and the pair of power supply shafts 7,
7 is a screw mechanism 4 due to the restoring force of a pair of springs 8, 8.
When the power supply shafts 7, 7 are pushed toward the third side and separated from the terminal pin 24, the distance between the pair of power supply shafts 7, 7 guided by the guide mechanism 44 increases, and the movement of the terminal pin 24 in the direction of the notch hole 25 is not restricted. Therefore, if the printed circuit board 27 with the device of the present invention attached thereto is moved in and out of the device case in the axial direction of the notch hole 25, no load is applied to the terminal pins 24, so that the printed circuit board 27 can be easily attached to and removed from the device case. I can do it.

〔Example〕

Embodiments of the present invention will be described based on the drawings. In FIGS. 1 to 6, 1 is a housing made of an electrically insulating material such as a synthetic resin material and is composed of two halves of the same shape and size, and 2 is a shield case that houses the housing 1. This shield case 2 prevents interference electromagnetic waves and fault potentials from the outside, has a high frequency shielding function, and has a ground potential (reference potential) that is the same potential as the equipment case.

The housing parts 1a, 1b form a rectangular recess 4 from the approximate center of the mating surface 3 to the lower end, and in this rectangular recess 4, from top to bottom, a holding piece 5, a power feeding piece 6, and a pair of power feeding shafts 7, 7 are disposed. , the orientation of both ends is approximately 90°
Place different coil springs 8, 8. The power supply shaft 7 has a circular cross section, and has a support shaft 12 protruding from the end of the power supply shaft 7 so as to draw an inward arc when descending and to draw an outward arc when ascending. A guide hole 13 for guiding and a guide hole 13 below it.
A terminal pin 24, which is a center contact, is supported and guided by a guide mechanism 44 formed of a guide surface 15 that is formed parallel to the guide surface 15 and guides the large diameter portion 14 of the power supply shaft 7, and is located at a predetermined position of a notch hole 25, which will be described later. With the power feeding piece 6 in contact with the power feeding piece 6, the pair of power feeding shafts 7, 7 are brought into contact with the power feeding piece 6 and the terminal pin 24, respectively. For the coil springs 8, 8, the coil portions are inserted into shaft portions 10, 10 protruding from the lower corners of the rectangular recess 4,
An annular groove 11, 1 having one end in contact with the bottom surface 9 of the rectangular recess 4 and the other end formed in the middle of the power supply shafts 7, 7.
1 and press the power supply shaft 7 against the power supply piece 6.

A recess 18 into which the screw hole 17 of the shield case 2 is fitted is formed in the upper surface 16 of the housing parts 1a, 1b, and the recess 18 and the rectangular recess 4 are connected by a long groove 20 with a semicircular cross section into which a half of the set screw 19 is fitted. A rectangular recess 22 is formed in the middle of this long groove 20 into which a half of a hexagonal nut 21 to be screwed with the set screw 19 is fitted. That is, a screw mechanism 43 is formed by a hexagonal nut 21 and a set screw 19 provided in the housing 1 above the presser piece 5.
is configured to push in and release the presser piece 5. A cutout hole 25 along the symmetric axis of the pair of guide surfaces 15, 15 is provided in the housing parts 1a, 1b between the middle of the pair of power supply shafts 7, 7 located at the upper limit to the spring side end surface 23 of the housing parts 1a, 1b. A terminal pin 24 of a plug attached to the device case is removably inserted into this notch hole 25. In addition, a pair of power supply shafts 7 located at the upper limit,
7 and the terminal pin 2 located at a predetermined position in the notch hole 25
Provide a gap between 4 and 4.

The housing 1 consists of housing parts 1a and 1b, and the coil springs 8, 8, the pair of power supply shafts 7, 7, the power supply piece 6, and the presser piece 5 are inserted into the rectangular recess 4 of one housing part 1a or 1b as described above. assembly,
After fitting the hexagonal nut 21 into the square recess 22, the other housing 1b or 1a is fitted, and when the housing 1 assembled in this way is fitted into the shield case 2, the edge of the housing insertion side of the shield case 2 A plurality of projecting pieces 26 are bent and fixed to the shield case 2. Next, set screw 19
The screw part 42 of the shield case 2 is inserted into the screw hole part 17 of the shield case 2.
When the screwing is completed, screw the hexagonal nut 21
The end of the set screw 19 is brought into contact with the presser piece 5. In this case, the reason why the screw hole portion 17 is provided is to prevent the set screw 19 from coming off from the shield case 2 even if it comes off from the hexagonal nut 21. The device of the present invention assembled in this way is inserted into the rectangular hole 28 of the printed circuit board 27 and fitted into a pair of fitting portions 29 and 2 formed in the middle of both outer surfaces of the shield case 2.
When inserted into the printed circuit board 27 at step 9, the hole 38 of the housing portion 1a and the hole 39 of the shield case 2 are inserted.
The bent end 40 of the power supply piece 6 that protrudes further is connected to the printed circuit board 27 via the flexible conductor 41, and then the bottom part 30 of the shield case 2 is connected to the metal bottom plate 31 and the top part 32 is made of metal. Attach to the cover 33 with screws 34, 35, etc., respectively. With such an assembly configuration, it is possible to eliminate external interfering electromagnetic waves and interfering noise potential, and it is also possible to maintain matching as a high frequency signal line. In addition, in this state, the notch hole 25 of the housing 1 is in direct communication with the notch hole 45 of the shield case 2 and the notch hole 46 of the metal bottom plate 31, so the printed circuit board 27 is connected to the metal base plate 27 as shown in FIG. When the bottom plate 31 is attached to support tubes 37, 37 protruding inside a case 36 of a CATV transmission device, the terminal pins 24 can be positioned at predetermined positions in the housing 1 through the notch holes 46, 45, 25.

In this embodiment, the portion of the power feed piece 6 that contacts the terminal pin 24 and the power feed shaft 7 is made of a flat plate, but it is bent slightly downward so that the portion contacts the power feed piece 6 and the power feed shaft 7 with its elastic force. You can also do this.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the terminal pin, which is the center contact of the plug attached to the equipment case by pressing the presser piece using the screw mechanism, is connected to the power supply piece and the pair of power supply shafts. Because it is designed to be strongly clamped with
The terminal pins are reliably connected to the printed circuit board at three locations with high contact pressure. Therefore, the power supply capacity can be increased, and the reliability of the terminal contact portion can be improved. Furthermore, since the printed circuit board can be inserted into and removed from the equipment case by releasing the pressure on the holding piece and moving the printed circuit board in and out of the cutout hole in the axial direction, the printed circuit board can be easily attached to and removed from the terminal pins.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention seen from the front, FIG. 2 is a longitudinal sectional view seen from the same side, FIG. 3 is a front view of the same, and FIG. 4 is a perspective view of the CATV transmission equipment in use. Fig. 5 is an explanatory diagram of how to attach and remove printed circuit boards etc. of CATV transmission equipment, Fig. 6 is an explanatory diagram of how to assemble the embodiment of the present invention, and Fig. 7 is an explanatory diagram of the operation of the holding piece and the pair of power supply shafts for the terminal pin. figure,
Fig. 8 is a partially cutaway sectional view of a conventional device, Fig. 9 is a perspective view of another conventional device, Fig. 10 is a sectional view of the same, and Fig. 1
FIG. 1 is a sectional view of another conventional device, and FIG. 12 is a view taken along arrow A in the same. DESCRIPTION OF SYMBOLS 1... Housing, 5... Holding piece, 6... Power feeding piece, 7... Power feeding shaft, 8... Spring, 23... Spring side end surface, 24... Terminal pin, 25... Notch hole, 27
...Printed circuit board, 43...Screw mechanism, 44...
Guidance mechanism.

Claims (1)

[Claims] 1 A screw mechanism is provided in the housing, and a spring that opposes this screw mechanism is provided via a holding piece, a power supply piece, and a pair of power supply shafts, one end of the power supply piece is connected to a printed circuit board attached to the housing, and a spring that opposes the screw mechanism is connected to a pair of power supply shafts. A notch hole into which a terminal pin of a plug attached to the equipment case is fitted is formed in the housing location between the middle of the housing and the end surface of the spring side of the housing in the printed circuit board insertion/removal direction,
and a guide mechanism that guides the pair of power supply shafts so that the power supply shafts contact the power supply piece and the terminal pin, respectively, with the power supply piece abutting the terminal pin located at a predetermined position in the notch hole using a screw mechanism. A printed circuit board terminal pin connection device with a housing.