JPH0379280A - Electronic part drawing tool and electronic part drawing method - Google Patents

Abstract

PURPOSE:To remove an electronic part from a board simply and surely by the combination of the eccentric arrangement of an action part, a chuck fitting part, plate spring, crank fitting part, jack lever, pivotally attaching part and rotating shaft. CONSTITUTION:The rotations of crack fitting parts 6, 6 pivoting on rotating shafts 8, 8 are caused until with action parts 2, 2 being moved further against spliced plate springs 4, 4, after respective chuck fitting parts 3, 3 being interlocked until interposing the metal case of an electronic part meanwhile, by the movements of the action parts 2, 2 by the operation of operation parts 1, 1, and the jack levers 7, 7 tip sides are projected from the chuck fitting parts 3, 3 tips. The tool in whole is ascended as much as the jack levers 7, 7 are projected and an electronic part D in whole is drawn from a board P.

Description

Detailed Description of the Invention (Object of the Invention) The present invention relates to a baked board or a copper-clad laminate in which a metal case type or DIP (dual in-line package, abbreviated as DIP) type is incorporated to form a predetermined circuit. For some reason, we may replace some electronic parts, or we may reuse circuits that were used as teaching materials.
This article relates to the electronic parts extraction tool needed to remove all the electronic parts that have been incorporated, and the method of using that tool to extract the electronic parts. Baked boards or copper-clad laminates are hard and can damage the electronic parts themselves. It is an object of the present invention to provide a new tool that is free from problems and has excellent operability, and a simple extraction method using the same.

(Prior art) ICs (integrated circuits), which are representative of electronic components widely used in televisions, Famicom computers, office equipment, etc., are formed in metal case type or DIP type, and are mounted on baked boards or in accordance with a predetermined circuit. They are arranged on a copper-clad laminate (hereinafter simply referred to as the board), and their lead wires (commonly known as legs) are fixed by soldering to the back of the board. The conventional method for removing only the desired electronic components from among the electronic components arranged on the board was to melt the solder on the back of the board, and while it was melting, remove most of the solder by adsorbing it. , using a radio bench or the like to pull it out from the front side of the board. With this conventional pulling method, most of the solder that fixed the legs of the electronic component was removed, and although the fixation was much weaker than usual, there was still some residual solder. Therefore, it was not easy to pull it out, and the board had to be firmly fixed in a vise before it could be pulled out, which was complicated.

In view of this situation, recently it has become possible to weld a socket for inserting IC lead wires into the board in advance on the premise of replacing it, so that the lead wires of electronic components can be inserted and pulled out as appropriate. However, since all electronic parts do not need to be replaced that much, it is extremely difficult to have a socket welded to the board, which only serves the purpose of replacement. This is wasteful, and of course, it has the drawback of being disadvantageous in terms of production costs.

In view of these circumstances, the present invention makes it possible to easily pull out electronic components from a board even if they are fixed with solder as in the past, without damaging either the pulled out electronic components or the board. We have succeeded in developing and perfecting a new tool and a method for pulling out electronic components using it.

(Structure of the Invention) As can be easily understood from the representative embodiments shown in the drawings, the electronic part extraction tool of the present invention is realized by the following structure.

That is, the distal ends of the pair of left and right operating parts 1.1 are crossed and pivoted 1.
1, the forward @ side of the pivot joint 11 is formed into a bilaterally symmetrical working part 2.2, and the pivot joint 11 is made into a common joint part so as to cover the previous working part 2.2. A pair of left and right chuck fitting parts 3.3 are formed, and these chuck fitting parts 3.
The free ends of leaf springs 4, 4 attached to the inside of 3 are attached to the inside of the tip of each acting part 2.2, and each chuck Metal parts 3, 3
while opening and closing the chuck fittings 3, 3.
On the outside of
．． The jacking rod 7.7 is disposed in parallel with the crank fittings 6, 6 so as to be movable up and down, and the crank fittings 6, 6 are eccentrically connected to the pivot portion 5.5. The action part 2.2 fl is pivoted by rotating shafts 8, 8, and when the action part 2.2 is moved by the operation of the operation parts 1, 1, each chuck fitting part 3°3 is attached to the metal case of the electronic component between them. Alternatively, after the DIP (hereinafter collectively referred to as DIP, etc.) is interlocked until it is clamped, the operating parts 2, 2 move further against the attached leaf spring 4, and the rotation shaft 8. 8
causing the crank metal fitting part 6.6 to rotate around .
This is an electronic part extraction tool in which the tip side of the jacking rod 7.7 protrudes from the tip of the chuck fitting part 3.3.

Operation unit 1. 1 corresponds to the part of a bench ticket such as a so-called radio bench that is operated by grasping and pinching with the hands, and the operating parts 2, 2, which intersect with each other with the pivot part 11 as a boundary, are the operating part 1. It will be expanded by the first gripping operation.

As can be understood from the partially broken perspective views of FIGS. 2 and 3, the action portion 2.2 is formed symmetrically in a box-like shape that expands outward. The acting part 2, 2
The rotation shafts 8, 8 which pivotally connect the crank fitting part 6.6 and the crank fitting part 6.6 are
To ensure an eccentric position for the pivot joints 5, 5 between the chuck metal part 3.3 and the crank metal parts 6, 6, and to form the pivot joint 5.5 without being obstructed by the action parts 2, 2. This shows a typical structure, and as long as both of these conditions are satisfied, the structure of the acting portion 2.2 is not necessarily limited to a box-shaped structure.

The upper ends of the chuck fitting parts 3, 3 are pivotally connected to the pivot parts ii, t1 of the operating part 1.1, and the outer lower edge of an electronic component, such as a dip, is locked to the lower end and the inner side of the vicinity thereof. The claw pieces 31, 31°... are formed symmetrically.

By forming a plurality of these claw pieces 31, 31°...on the top and bottom in advance according to the length of the lead wire of the electronic component, it is possible to handle several different types of electronic components. This means that a tool that can be used can be realized.

On the other hand, inside the chuck fittings 3, 3, there is a plate spring 4.
．． 4 is attached, and the working part 2 has its upper free end.
．． When the operation part 1.1 is gripped and the action parts 2, 2 are moved, the action part 2.2 is always pressed so that the action part 2.2 comes into contact with the inside of the lower end of the action part 2, unless resistance is particularly applied to the chuck fitting part 3.3.
The chuck fitting part 3.3 realizes the same movement in conjunction with the movement of the chuck fitting part 3.3, and once resistance is applied to the chuck fitting part 3.3, the posture of the chuck fitting part 3.3 remains fixed. Further, only the operating portion 2.2 can be operated inward (in the direction of narrowing to π11) within a suitable range while resisting the elastic force of the leaf spring 4.4. Therefore, the chuck fitting part 3
3 is fixed, when an extremely large force exceeding the elastic resistance value of the leaf spring 4.4 is applied, the action portion 2.
Since there is a risk that the leaf springs 4.4 that the leaf springs 4.2 come into contact with may be destroyed or come off, the action parts 2. It is desirable to incorporate an appropriate regulating structure for regulating the two intersecting layers within a predetermined range.

In addition, between the chuck fitting parts 3, 3 and the action part 2.2,
It goes without saying that the leaf spring 4.4 can be replaced with a coil spring or other elastic material.

The crank fitting portion 6.6 has an outer portion pivoted to the outside of the action portions 2, 2 by a rotation shaft 8, and an inner portion thereof pivoted to the chuck fitting portions 3, 3, and a chuck fitting Part 3, 3
Naturally, when the pivot joints 5, 5 . Since the position of is also fixed, the acting parts 2, 2 are narrowed against the leaf springs 4, 4 (movement of arrow a in Fig. 2), and the position of the rotation shafts 8, 8 is accordingly changed. , as a result of movement in the direction of the arrow in FIG. 2, the crank fittings 6, 6 begin to rotate about the pivot joint 5.5, as indicated by the arrow C in the figure, and pivot outward at the upper end. Since the attached jacking rods 7.7 are pushed down as shown in d in the same figure, the tips of the jacking rods 7.
As shown in the perspective view of the main part, the chuck fitting part 3
, 3 protrudes from the lower end.If, on the other hand, the tip of the jacking rod 7.7 is fixed, the entire tool excluding the jacking rods 7,7 will rise by the amount that the jacking rod 7.7 protrudes. Therefore, if a dip or the like of an electronic component is sandwiched between the claw pieces 31 and 31 of the chuck fitting part 3.3, the entire electronic component will be separated from the substrate P.

In the figure, 32 indicates an insertion tube formed on the outside of the chuck fitting part 3.3 to guide the movement of the jacking rod 7.

A method for extracting electronic components using the electronic component extraction tool of the present invention having the above-mentioned configuration is as follows.

(Other related inventions) Operation section 1 of the electronic part extraction tool of the present invention having the above-described configuration.
1 and apply force to the chuck fitting part 3.3
After operating the claws 31, 31 in the direction of closing each other so that the claw pieces 31, 31 are engaged with both ends of the bottom surface of the dip, etc. of the electronic component implanted on the board P, the lead wire protruding from the back surface of the board P is fixed. While heating and melting the solder part F with the heater 9, further force is applied to the operation parts 1, 1, and the action parts 2, 2 are heated and melted.
By moving further inward against the attached leaf springs 4, 4, the crank fitting part 3.3 is rotated and the jacking rod 7,
7 The tip is projected and pressed against the surface of the substrate P, and the desired electronic component is separated from the substrate P by the reaction force that causes the entire electronic component to separate from the substrate P in a substantially parallel manner. This is a method for extracting electronic components.

The electronic component lead wires 7 may have different lengths depending on the electronic component, so in order to accommodate those different lengths, the lead wires 7 are placed inside the chuck fittings 3, 3 at 31' in the figure. , 31', if claw pieces of different heights are formed, one tool can be used to pull out multiple electronic components with different lead wire lengths. .

As shown in the perspective view of FIG. 4, the heater 9 has two rows of elongated nozzles with built-in chrome wires so that the entire solder portion F on the back side of the board P can be heated and melted evenly. It has a structure like the gas burner formed in 9191 (good), and is realized by a structure in which a handle and an ignition lever are combined on the side omitted in the figure. After sandwiching the electronic component with the tool of the invention and holding the board P in a substantially vertical position, press the nozzle 91,91 of the heater 9 against the solder part F on the back side of the board P to ignite it, and wait a while. By grasping the operating part 1.1 strongly when the solder has softened, the electronic component can be easily pulled out from the board P.

(Function and Effect) As described above, the electronic part extraction tool of the present invention can hold the electronic component and then apply a force perpendicular to the board P by simply adjusting the force when gripping the operating part 11 with the hand. Acting part 2. Chuck fitting part 3
This was realized by the combination of the leaf spring 4, the crank fitting part 6, the jack rod 7, and the eccentric arrangement of the pivot part 5 and the rotating shaft 8. Moreover, this tool can be used to pull out electronic components. The method is to replace electronic components that have been manufactured using conventional methods with a printed circuit board due to some reason, such as the need to replace parts due to failure or the need to reuse them many times in educational materials. When trying to pull out any electronic component from the board, it exhibits an extremely excellent feature in that it is possible to easily and reliably remove the board P without having to use a special device such as a vise to fix the board P one by one. It is.

As described above, the present invention uses a tool with a new and simple structure and an easy-to-operate electronic component extraction method using the tool, which functions extremely effectively in the work of extracting electronic components from a board. In an era when machines and appliances that do not use parts are becoming rare, repair of these electronic parts,
As the need for inspections and related training increases, it is expected that this system will prove extremely effective.

[Brief explanation of drawings]

The drawings are based on an embodiment representative of the present invention, and FIG. 1 is an overall perspective view, FIG. 2 is a partially cutaway perspective view of the main part, and FIG. 3 shows another mode of use. A perspective view similar to FIG. 2, and FIG. 4 are partially omitted perspective views for explaining the state of use. DESCRIPTION OF SYMBOLS 1... Operating part, 11... Pivoting part, 12... Compression spring, 2... Acting part, 3... Chuck fitting part, 31... Same claw piece, 32...・The same insertion tube, 4...
Leaf spring, 5... Pivot joint part, 6... Crank metal fitting part, 7
... Jacket rod, 8 ... Rotating shaft, 9 ... Heater,
91...Same nozzle, D...Metal case or DI
P, F...Solder part, L...Lead wire.

Claims (1)

[Scope of Claims] 1. The distal ends of the pair of left and right operation parts are crossed and pivotally connected, and the distal ends of the pivot parts are respectively bilaterally symmetrical operating parts, and the pivot parts are connected to a common pivot joint. Then, a pair of left and right chuck fittings are formed so as to cover the previous operating parts, and the free ends of the leaf springs attached to the inside of these chuck fittings are attached to the inside of the tip of each operating part, so that the operation part can be operated. Each chuck fitting part is made to open and close in conjunction with the movement of the acting part, while a crank fitting part is provided on the outside of each chuck fitting part so as to move in conjunction with a crank fitting part pivoted at an appropriate position at the upper end of the chuck fitting part. The jack rods are arranged parallel to each other so that they can freely move up and down, and the eccentric part of the crank fitting part is pivoted to the appropriate position of the operating part to serve as a rotation axis, so that the action part can be moved by operating the operating part. After each chuck fitting part is interlocked until the metal case of the electronic component or DIP is clamped between them, the action part moves further against the attached leaf spring, and the movement is made around the rotation axis for the first time. causing rotation of the crank metal part,
An electronic part removal tool in which the tip of the jack rod protrudes from the tip of the chuck fitting. 2. The electronic component extraction tool set forth in claim 1 is implanted in a bake plate or a copper-clad laminate by gripping the operating part and applying force to operate the interlocking chuck fittings in a direction to close each other. After fitting the metal case of the electronic component or both ends of the bottom surface of the DIP, the solder part that fixes the lead wire protruding from the back side of the bake plate or copper-clad laminate is heated and melted with a suitable heater, and then further attached to the operation part. By applying force and moving the acting part further inward against the attached leaf spring, the crank metal fitting part is rotated to project the tip of the jack rod and press it against the surface of the baked board or copper-clad laminate. Electronic component drawing characterized in that the entire electronic component is separated from the baked board or copper-clad laminate in a substantially parallel manner by the reaction force, and the desired electronic component is separated from the baked board or copper-clad laminate. Method.