JPH11226879A - Connector press fit tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector press fit tool press fitting a connector of small number of terminals to a wiring hole of printed circuit board or the like. SOLUTION: This constitution comprises a bar-shaped pusher 11 provided with a connector press part 13 having a slit 12 interposing a cable of a connector in one end to be formed with a diametrically spread shaft part 18 in the other end, press shaft 19 having a shaft part pressing the pusher in one end and a shaft part with the other end side in a small diameter toward a tip end part, helical eccentric spring 20 mounted in the press shaft, guide member 17 enveloping the diametrically spread part of the pusher and the press shaft mounting the eccentric spring, cylindrical body 21 formed with an inner brim 22 in an internal intermediate part connecting one end to the guide member and the other end to a knob 23, columnar weight 29 mounted in the other end side from an inner brim of a body to be formed with a counter bore 28 in an inner brim side, and a helical pressure spring 30 mounted between the weight and the knob provided in the inside of the cylindrical body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector press-fitting tool for manually press-fitting a connector having a small number of terminals of about 1 to 4 one by one into a wiring hole of a printed circuit board or the like.

[0002]

2. Description of the Related Art Various types of printed circuit board connectors to be connected to circuit terminals of a printed circuit board have been conventionally proposed. For example, there are a type in which a connector alone is soldered directly to a terminal portion of a printed circuit board, and a type in which a terminal of a connector or a terminal alone is directly pressed into a circuit wiring hole of a printed circuit board. Each of these press-fit type connectors or terminals is press-fitted in a state in which cables or the like that hinder press-fitting are not connected, and cables are connected to these connectors press-fitted to the printed circuit board. Another connector to be paired is fitted and connected, and a cable is soldered and connected to the press-fit terminal.

[0003]

However, recently,
A demand has arisen for a connector that has a structure in which a small connector with a small number of terminals and a cable can be directly pressed into the wiring hole of the printed circuit board. Tools for press-fitting are not currently provided. That is, for example, when the two-terminal connector 2 to which the cable 1 is connected as shown in FIG. 6 is press-fitted into the wiring hole 4 of the printed circuit board 3, the connection is secure and the connector does not easily fall out of the wiring hole. As described above, the terminal 5 of the connector 2 has the press-fit portion 6 close to the base thereof protruded and widened, and
This portion is pressed into the wiring hole 4. Therefore, such a connector 2 is connected to the wiring hole 4 of the printed circuit board 3.
When press-fitting is required, a considerable pressure is required, and manual insertion by the operator requires considerable labor, work efficiency is low, and press-fitting accuracy, that is, uniformity of press-fitting, is required. There is a problem that it is difficult to secure them. Therefore, the present invention provides a small connector terminal having a small number of terminals.
It is an object of the present invention to provide a novel connector press-fitting tool which is directly press-fitted into a wiring hole of a printed circuit board.

[0004]

A connector press-fitting tool according to the present invention is provided with a connector pressing portion having a slit for inserting a connector cable at one end, and a detent and an enlarged shaft portion for transmitting a pressing force at the other end. A formed rod-shaped pusher, a cylindrical pressing shaft having a shaft portion at one end that presses the enlarged-diameter shaft portion of the pusher, and a shaft portion having the other end having a smaller diameter toward the tip end thereof; A helical wound eccentric spring mounted on the pressing shaft such that an open end is located on the other end side of the pressing shaft, and a pressing shaft on which the enlarged shaft portion of the pusher and the eccentric spring are mounted. A guide member that surrounds and guides the pusher and the pressing shaft to move in the axial direction thereof, the guide member is coupled to one end, and a knob for operating the pressing operator is coupled to the other end. , A cylinder with an inner collar formed in the middle part And the tip of the pressing shaft protruding from the inner flange of the body is moved toward the center by the compression action of the eccentric spring. When doing, a cylindrical weight having a counterbore hole into which the pressing shaft enters, a helical pressure spring mounted between the weight and the knob provided inside the cylindrical body, It is provided with.

[0005]

1 is an external view of an embodiment of a connector press-fitting tool according to the present invention, and FIG. 2 is a partial longitudinal sectional view thereof. In FIG. 1 and FIG. 2, reference numeral 11 denotes a pusher provided with a connector pressing portion 13 having a slit 12 for sandwiching a connector cable at a distal end portion, and is connected to a connection shaft 14. The connector pressing portion 13 is screwed to the connection shaft 14 and fixed by the nut 15, so that the connector pressing portion 13 can be replaced depending on the type of the connector or the connection cable press-fitted into the wiring hole of the printed circuit board. Is what it is. Further, as shown in the perspective view of FIG. 3, the structure of the distal end portion of the connector pressing portion 13 is such that the cable is sandwiched between the slits 12 and the distal end portions 16 on both sides thereof press the cable-side end surface of the connector.

Reference numeral 17 denotes a guide member which slidably accommodates one end of the connecting shaft 14 of the pusher 11, and which is dropped by a retaining large-diameter shaft portion 18 provided at the end of the connecting shaft 14. Has been prevented. Further, a pressing shaft 19 and a helical eccentric spring 20 mounted on the pressing shaft 19 are inserted into the guide member 17. Reference numeral 21 denotes a cylindrical body, one end of which is screwed to the guide member 17 and the other end of which is screwed to the knob 23. An inner flange 22 having a required inner diameter is provided at an inner middle portion thereof. ing. And the aforementioned pressing shaft 19
And the eccentric spring 20 is in a state where little pressure is applied to the eccentric spring 20 in the guide member 17 between the end face of the enlarged diameter shaft portion 18 of the connecting shaft 14 and the inner flange 22 of the body 21 or slightly. Is attached so as to be added.

[0007] The relationship between the pressing shaft 19 and the eccentric spring 20 is such that a flange 25 is provided at one end of the pressing shaft 19 following the shaft 24, and the thickness of the shaft is increased from the flange 25 toward the other end. 2
It has been reduced to stages. That is, the middle diameter portion 2 connected to the flange portion 25
6 is formed to have a thickness substantially the same as the inner diameter of the eccentric spring 20;
A small diameter portion 27 is formed smoothly from the middle diameter portion 26. One end of the eccentric spring 20 has a flange 25 of the pressing shaft 19.
, And the other end has a natural length and the small diameter portion 2 of the pressing shaft 19
7, and is eccentric so that the distal end of the small diameter portion 27 of the pressing shaft 19 presses against the inside of the distal end of the eccentric spring 20. Therefore, as is clear from FIG. 2, the pressing shaft 19 is assembled in a state where the press-fitting tool is inclined with respect to the central axis when the press-fitting tool is not operated.

Next, in the interior of the body 21 between the inner flange 22 and the knob 23, a counterbore 28
Weight 29 and a helical pressure spring 30
Is provided. The counterbore 28 of the weight 29 is
The small-diameter portion 27 has an inner diameter larger than the outer diameter of the small-diameter portion 27. The knob 23 is made of plastic or wood, and a joint with the body 21 is provided with a cylindrical embedded metal fitting 31 having a bottom. As described above, the connection between the body 21 and the knob 23 is made by screwing, but the depth of the connection is determined by a plurality of screws mounted between the step 32 of the body 21 and the connection edge 33 of the knob 23. Is adjusted by the C-shaped ring 34 of FIG. In the embodiment shown in FIG. 2, the C-shaped ring 34 shown in FIG.
Are mounted, and the pressure spring 30 is in a substantially natural length state.

That is, when the number of the C-rings 34 is increased, the connection becomes shallower, and the pressure spring 30 is not compressed. When the number of the C-rings 34 is reduced, the connection becomes deeper, and the end face of the weight 29 becomes larger. 35 and bottom surface 36 of knob 23
With this, pressure is applied to the pressure spring 30 and the C-shaped ring 34
The compression state changes according to the degree of the number of pieces mounted. In addition, a spring washer is inserted into the outer abutting portion in the connection between the guide member 17 and the body 21 to prevent loosening between the two. The above has described the structure of the connector press-fitting tool of the present invention.

Next, the operation of inserting the connector 2 shown in FIG. 6 into the printed circuit board 3 using the connector press-fitting tool of the present invention will be described with reference to FIG. While holding the cable 1 of the connector 2 in the slit 12 of the connector pressing portion 13 of the pusher 11, the tip of the terminal 3 of the connector 2 is inserted into the wiring hole 4 of the printed circuit board 3 from above, and as shown in FIG. The knob 23 is press-fitted from above so as to be perpendicular to the printed circuit board. This pressure is transmitted to the pressing shaft 19 via the pusher 11, and the pressing shaft 1
9 is for compressing the eccentric spring 20 and its tip is the body 21
Over the front end of the inner collar 22 and abuts the end of the periphery of the counterbore 28 of the weight 29. When the knob 23 is pressed down by further applying pressure, a pressing force is applied to the weight 29 by the tip of the pressing shaft 19, and the pressure spring 30 is compressed and its repulsive force is accumulated.

The compression of the eccentric spring 20 causes the spring portion to be biased toward the middle diameter portion 25 of the pressing shaft 19, whereby the pressing shaft 19 gradually changes its direction toward the central axis, and reaches a predetermined downward stroke. At this point, the tip (small diameter portion 26) of the pressing shaft 19 enters the counterbore 28 of the weight 29. At this time, the compressed pressure spring 30 is released, and the stored repulsive force is applied to the weight 29 as an impact force, and the pressing shaft 1 into which the bottom surface of the counterbore hole 28 has entered.
9 and the push shaft 11 pushes the pusher 11
The impact force is transmitted to. This momentary impact force is applied to the pressing shaft 19.
Of the connector 2 is added to the manual pressing force until the tip of the terminal 2 enters the counterbore 28 of the weight 29,
Is pressed into the wiring hole 4 of the printed circuit board 3.

As described above, when the number of the C-rings 34 is small, the pressure spring 30 is compressed to some extent from the beginning. When entering the counterbore 28, the compression amount of the pressure spring 30 is large and the stored repulsive force is also strong, so that the impact force applied to the pusher 11 increases. Further, the number of the C-shaped rings 34 to be mounted is large, and the weight 29 and the pressure spring 30 are temporarily
When there is play in the up-down direction between the inner flange 22 and the bottom surface 35 of the knob 23, the tip of the pressing shaft 19 enters the counterbore 28 of the weight 29 by a predetermined depression stroke of the knob 23. The compression amount of the pressure spring 30 is small,
The impact force applied to the pusher 11 decreases.

In the above description, it has been described that regardless of the initial compression state of the pressure spring 30, the pushing-down stroke when the tip of the pressing shaft 19 enters the counterbore 28 of the weight 29 is the same. As the compression force of the pressure spring 30 increases, the amount of compression of the eccentric spring 20 increases, and the displacement of the pressing shaft 19 in the central axis direction is accelerated.
The tip of the pressing shaft 19 may enter the counterbore 28 of the weight 29 with a small pressing stroke. That is, the relationship between the depression stroke and the impact force is determined by the C-type ring 34.
It depends on the relationship between the spring pressure of the pressure spring 30 and the eccentric spring 20, the shape of the mounting portion of the eccentric spring 20 on the pressing shaft 19, and the amount of eccentricity of the eccentric spring 20. Then, the impact force is selected.

[0014]

As described in detail above, the connector press-fitting tool according to the present invention is a tool for directly press-fitting a small connector having a small number of terminals into a wiring hole of a printed circuit board. The connector can be securely press-fitted, and it is possible to perform the press-fitting work of this kind of connector efficiently and stably.

[Brief description of the drawings]

FIG. 1 is an external view showing an embodiment of a connector press-fitting tool according to the present invention.

FIG. 2 is a partial longitudinal sectional view showing one embodiment of the connector press-fitting tool of the present invention.

FIG. 3 is a perspective view of a connector pressing portion of the connector press-fitting tool of the present invention.

FIG. 4 is a top view of the C-shaped ring of the connector press-fitting tool of the present invention.

FIG. 5 is a schematic view showing a situation where a connector is press-fitted into a printed circuit board by the connector press-fitting tool of the present invention.

FIG. 6 is a perspective view showing an example of a connector and a printed circuit board to be press-fitted by the connector press-fitting tool of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cable 2 Connector 3 Printed circuit board 4 Wiring hole 5 Terminal 6 Press-fit part 11 Pusher 12 Slit 13 Connector pressing part 14 Connecting shaft 15 Nut 16 Tip part of connector pressing part 17 Guide member 18 Large diameter shaft part 19 Pressing shaft 20 Eccentric spring 21 Body 22 Inner flange of body 23 Knob 24 Shaft of pressing shaft 25 Flange of pressing shaft 26 Medium diameter portion of pressing shaft 27 Small diameter portion of pressing shaft 28 Counterbore 29 Weight 30 Pressure spring 31 Embedded metal fitting 32 Step 33 Knob Coupling edge 34 C-shaped ring 35 End face of weight 36 Bottom of knob 37 Spring washer

Claims (3)

[Claims] 1. A rod-shaped pusher having at one end a connector pressing portion having a slit for sandwiching a connector cable, and a rod-shaped pusher formed at the other end with a retaining shaft and an enlarged-diameter shaft portion for transmitting pressing force, and the pusher at one end. A cylindrical pressing shaft having a shaft portion for pressing the enlarged diameter shaft portion, the other end side of which is formed with a shaft portion having a smaller diameter toward the front end portion, and an open end on the other end side of the pressing shaft. A helical wound eccentric spring mounted on the pressing shaft so as to be positioned, enlarging the enlarged shaft portion of the pusher and the pressing shaft on which the eccentric spring is mounted, the pusher and the pressing shaft A guide member for guiding movement in the axial direction, a cylinder having one end connected with the guide member, a second end connected with a knob for operating a pressing operator, and an inner flange formed at an inner intermediate portion. Shaped body, from the inner collar of the body to the knob side A counterbore hole into which the pressing shaft enters when the distal end of the pressing shaft protruding from the inner flange of the body moves toward the center due to the compressive action of the eccentric spring. A connector press-fitting tool comprising: a cylindrical weight; and a helical pressure spring mounted between the weight and the knob provided inside the cylindrical body. 2. A C-shaped ring for adjusting the initial compression state of the helical pressure spring mounted in the body is required between the step of the body and the coupling edge of the knob. 2. The connector press-fitting tool according to claim 1, wherein a number of said tools is mounted. 3. The connector press-fitting tool according to claim 1, wherein the connector pressing portion of the pusher has a replaceable screwing structure so as to be compatible with the type of the connector.