CN101207975B - Welding fixture for circuit board - Google Patents

Abstract

A welding fixture for a circuit board is used to clamp electronic components on the circuit board. The welding fixture includes: a base; a movable plate, which is pivotally arranged above the base to form a clamping space between the base and the movable plate; a pressing plate, which is slidably arranged above the movable plate, and a plurality of pressing pieces are arranged on the pressing plate, and the pressing pieces pass through the movable plate and extend into the clamping space to vertically press against the top of the electronic components on the circuit board; a positioning module, which is arranged on the side of the movable plate to position the pressing plate; and a plurality of guide rods, which are arranged above the movable plate and pass through the pressing plate to allow the pressing plate to slide up and down through the guide rods, and a guide sleeve is sleeved on the guide rod, and the guide sleeve is fixed on the pressing plate, so that the pressing plate can slide up and down stably; so that the pressing pieces can vertically contact the tops of the electronic components downward to avoid the defect that the electronic components cannot be tightly attached to the circuit board due to the lateral thrust.

Description

Soldering jig for circuit board

technical field

The invention relates to a soldering fixture for a circuit board, more specifically, a fixture for clamping a circuit board. the

Background technique

Generally, the printed circuit board is soldered after inserting various electronic components on it, and the electronic component can be firmly and closely attached to the surface of the circuit board. After inserting the electronic component on the circuit board, clip Mounted on a welding fixture, the electronic component can be closely attached to the circuit board, and then the welding operation is performed. the

Please refer to Fig. 1 , the existing welding fixture is pivotally provided with a pressing plate 12 above a side of a base 11, so that a clamping space 13 is formed between the base 11 and the pressing plate 12, so that in the clamping space 13 A circuit board 14 is sandwiched, and a plurality of electronic components 141 have been plugged into the circuit board 14, such as capacitors, resistors, inductors, transformers and electrical connectors, etc. A pressing part 15, and the position of the pressing part 15 is located above the electronic components 141. the

During operation, first this pressing plate 12 is opened upwards, then this circuit board 14 is placed flat on the predetermined position of this base, and this pressing plate 12 cover is installed again, because the pressed part 15 of this pressing plate 12 bottom surface is relative to this circuit The electronic assembly 141 on the board 14, and the electronic assembly 141 can be firmly pressed on the circuit board 14 by the pressing part 15, so that the electronic assembly 141 is closely attached to the surface of the circuit board 14, so as to avoid the electronic assembly 141 An excessive gap is generated between the circuit board 14 and the electronic component 141 becomes loose after soldering. the

But the pressing plate 12 is unilaterally pivoted on one side of the base 11. When the pressing plate 12 is pressed on the top of the circuit board 14, the electronic component 141 closer to the pivoting end first contacts the pressing part 15, and the farther it is from the pressing part 15. The later the electronic component 141 at the pivot end contacts the pressing part 15, that is, there is an angle between the pressing part 15 and the electronic component 141, so that the pressing parts 15 contact the electronic components 141 asynchronously; in short, That is, the pressed part 15 is not pressed vertically on the tops of the electronic components 141, so that the electronic components 141 are tilted, so that the electronic components 141 cannot only be tightly attached to the circuit board 14 on the surface, and then lead to loosening of the electronic components 141 after soldering. the

Please refer to FIG. 2A and FIG. 2B, especially for some electronic components that are larger in size and closer to the pivot joint, such as inductors, transformers or electrical connectors, when the pressing plate 12 is pressed down, the first to contact These pressed parts 15 (as shown in FIG. 2A ), and after the pressed parts 15 on the bottom surface of the pressing plate 12 are all pressed against the tops of the electronic components 141, the bulky electronic components that are first contacted by the pressed parts 15 141 generates a lateral thrust f, causing a gap G or offset between the electronic components 141 and the circuit board 14 , thus causing the above-mentioned defects. the

Therefore, how to develop a soldering fixture for pressing the electronic component tightly against the circuit board, so as to avoid a gap between the electronic component and the circuit board, so that the electronic component is closely attached to the circuit board, is currently a problem. urgent technical issues to be resolved. the

Contents of the invention

In view of the above-mentioned shortcomings of the prior art, the main purpose of the present invention is to provide a circuit board soldering jig for tightly pressing the electronic components against the surface of the circuit board to avoid gaps or offsets. the

Another object of the present invention is to provide a soldering fixture for circuit boards to prevent loosening of electronic components after soldering. the

In order to achieve the above and other related objectives, the present invention provides a circuit board welding fixture for clamping electronic components on the circuit board. The welding fixture includes: a base; a movable plate pivotally arranged above the base, so that A clamping space is formed between the base and the movable plate for clamping the circuit board with electronic components; the pressing plate is slidably arranged above the movable plate, and there are multiple pressing parts on the pressing plate, and the pressing parts pass through The movable plate extends into the clamping space and vertically presses against the top of the electronic component on the circuit board; the positioning module is arranged on the side of the movable plate to position the pressing plate; and a plurality of guide rods are arranged on the movable plate above the plate, and pass through the pressure plate, so that the pressure plate slides up and down through the guide rod, and a guide sleeve is set on the guide rod, and the guide sleeve is fixed on the pressure plate, so that the pressure plate slides up and down stably . the

According to the above structure, the present invention also includes a first elastic component as a spring, which is arranged on the guide rod and located between the pressing plate and the movable plate, so that the pressing plate returns after sliding down. the

The positioning module is provided with a telescopic piece in the base body, and a second elastic component that is a spring is provided between the base body and the telescopic piece, so that after the pressing plate moves downward, one end of the telescopic piece withdraws outward and then returns Press against the edge of the platen to position the platen. the

The end of the telescopic element located at the edge of the pressing plate has an inclined surface, and the end of the expanding element opposite to the inclined surface has a pushing portion, and by pulling the pushing portion, the end with the inclined surface of the expanding element is separated from the edge of the pressing plate, and the to release the pressing plate, and make the pressing plate return and rise through the first elastic component. the

Compared with the prior art, the circuit board welding jig of the present invention first places the circuit board with electronic components above the base, then puts down the movable plate, and then pushes the pressing plate down, so that the pressed parts on the bottom surface of the pressing plate vertically downward contact on the top of these electronic components, so that the pressing part can contact these electronic components synchronously, so that these electronic components are closely attached to the circuit board, so as to avoid the existing soldering fixture on the When the pressure plate is pressed down, due to the different contact time, a lateral thrust is generated, resulting in a gap or offset between the electronic component and the circuit board, which cannot be tightly attached to the surface of the circuit board. the

Description of drawings

Fig. 1 is the side view schematic diagram of the soldering fixture of existing circuit board;

Fig. 2A is the schematic diagram that the pressed part of the welding jig of existing circuit board is contacted on the top of electronic component;

Figure 2B is a schematic diagram of the lateral thrust generated after the pressing part of the welding fixture of the existing circuit board contacts the top of the electronic component;

Fig. 3 A is the side view schematic diagram of the movable part and the pressure plate cover of the welding fixture of the circuit board of the present invention on the circuit board; and

FIG. 3B is a schematic side view of the pressing part on the bottom surface of the pressing plate of the soldering fixture for the circuit board of the present invention in vertical contact with the electronic components on the circuit board. the

Explanation of reference signs

11, 21 base 12, 24 pressure plate

13, 23 clamping space 14, 3 circuit board

141, 31 electronic components 15, 26 pressed parts

2 welding fixture f lateral thrust

22 movable plate 251 guide sleeve

252 first elastic component 25 guide rod

27 Positioning module 271 Seat body

272 telescopic part 272a inclined plane

272b Push part G Gap

273 Second elastic component

Detailed ways

Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily observe other advantages and effects of the present invention from the content disclosed in this specification. the

Please refer to FIG. 3A and FIG. 3B , which are schematic side views of the welding jig of the circuit board of the present invention; the welding jig 2 is used to clamp the electronic component 31 on the circuit board 3, and the welding jig 2 includes: a base 21; The movable plate 22 pivotally arranged on the top of the base 21 forms a clamping space 23 between the base 21 and the movable plate 22 for clamping the circuit board 3 with the electronic component 31; The pressure plate 24 above the plate 22 is provided with a plurality of guide rods 25 above the movable plate 22, and a guide sleeve 251 is set on the guide rod 25 and fixed on the pressure plate 24, so that the pressure plate 24 slides up and down stably , and on the guide rod 25 and between the pressing plate 24 and the movable plate 22, a first elastic component 252 is provided as a spring, so that the pressing plate 24 is returned by the first elastic component 252 after sliding downward, and A plurality of pressing parts 26 are provided on the pressing plate 24, and the pressing parts 26 pass through the movable plate 22 and extend into the clamping space 23 to vertically press against the top of the electronic component 31 on the circuit board 3; The positioning module 27 on the side of 22 is used to position the pressing plate 24. the

The positioning module 27 is provided with a telescopic part 272 in the base body 271, and a second elastic component 273 which is a spring is arranged between the seat body 271 and the telescopic part 272; An inclined surface 272a is pressed against the edge of the pressing plate 24 by the end of the telescopic member 272 having the inclined surface 272a, so as to locate the pressing plate 24. There is a pushing portion 272b at the end of the telescopic element 272 opposite to the inclined surface 272a. Pulling the pushing portion 272b makes the end of the telescopic member 272 with the inclined surface 272a detached from the edge of the pressing plate 24 to release the pressing plate 24 and make the pressing plate go back and rise through the first elastic component 252 . the

From the above structure, the step of clamping the circuit board 3 in the clamping space 23 of the soldering fixture 2 is to first determine that the movable plate 22 is in an open state, and then place the circuit board 3 with the electronic components 31 on the On the predetermined position of base 21, then put down this movable plate 22, make this movable plate 22 be positioned at the top of this circuit board 3; Push this pressing plate 24 again, make this pressing plate 24 slide down vertically and stably by this guide rod 25 , so that the pressing part 26 at the bottom of the pressing plate 24 uniformly contacts the top of the electronic assembly 31 on the circuit board 3; 272 on the inclined surface 272a, so that the telescopic member 272 can be pushed outward by the action of the inclined surface. When the lower part of the edge of the pressing plate 24 crosses the bottom of the inclined surface 272a, the telescopic member 272 returns to its original position through the elastic force of the second elastic component 273 Make the lower part of the inclined surface 272a of the telescopic member 272 lean against the upper part of the edge of the pressing plate 24, thereby positioning the pressing plate 24 in a depressed state, and positioning the pressing part 26 at the bottom of the pressing plate 24 to press the circuit board 3. These electronic components, and these pressings 26 contact vertically downwards on the top of the electronic components 31, without generating lateral thrust, so that these electronic components 31 can be closely contacted on the surface of the circuit board 3, so as to avoid gaps Or offset situation, which can facilitate the subsequent welding manufacturing, thereby avoiding the loosening of these electronic components 31; therefore, the defects of the existing structure can be avoided. the

After finishing the welding and manufacturing, when desiring to take off the circuit board 3, the telescopic member 272 is pulled out by the pushing portion 272b, so that the lower part of the inclined surface 272a of the telescopic member 272 is separated from the edge of the pressing plate 24, and The pressing plate 24 can be released, and at this time, the pressing plate 24 returns and rises through the first elastic component 252, so that the pressing part 26 at the bottom of the pressing plate 24 is no longer pressed against the electronic component 31 on the surface of the circuit board 3; finally, Then lift the movable plate 22 upwards to take out the circuit board 3 which has completed the soldering manufacturing method. the

In summary, in the circuit board welding jig of the present invention, the pressing plate is vertically slid on the movable plate so that the circuit board with electronic components is placed above the base, the movable plate is put down, and the pressing plate is pushed down , so that the pressed part on the bottom surface of the pressing plate contacts the top of the electronic components vertically downwards, so that the pressed part contacts the electronic components synchronously, so that the electronic components are closely attached to the circuit board, thereby avoiding In some welding fixtures, when the pressure plate is pressed down, due to the different contact time, lateral thrust is generated, resulting in a gap or offset between the electronic component and the circuit board, which cannot be tightly attached to the surface of the circuit board. the

The above-described embodiments are only preferred implementations of the present invention, and are not intended to limit the scope of the present invention. All equivalent modifications or changes made without departing from the spirit and technical ideas disclosed in the present invention should still be covered by the preceding claims.

Claims (7)

1. the weld jig of a circuit board in order to clamp electronic building brick on circuit board, is characterized in that, the weld jig of this circuit board comprises:

Base;

Portable plate, it is hubbed at this base top, makes to form one between this base and the portable plate and insert and put the space, in order to clamp the circuit board that this has electronic building brick;

Pressing plate, its slip are located at this portable plate top, are provided with a plurality of rolled-up stocks in this pressing plate, and this rolled-up stock passes portable plate and stretches into and insert and put spatial vertical and be pressed against electronic building brick top on this circuit board;

Locating module, it is located at this portable plate side, in order to locate this pressing plate;

A plurality of guide rods, it establishes this portable plate top, and passes this pressing plate, make this pressing plate by this guide rod to slide up and down; And

Guide pin bushing, it is sheathed on this guide rod and is fixed on this pressing plate, this pressing plate is stable to slide up and down thereby make.

2. the weld jig of circuit board according to claim 1 is characterized in that, also comprises first elastic parts, and it is located on this guide rod, and between this pressing plate and portable plate, makes this pressing plate in return after lower slider.

3. the weld jig of circuit board according to claim 2 is characterized in that, this first elastic parts is a spring.

4. the weld jig of circuit board according to claim 1, it is characterized in that, this locating module is provided with an extensible member in a pedestal, between this pedestal and extensible member, be provided with one second elastic parts, after this pressing plate was moved down, an end of this extensible member outwards withdrawed from the back return and is pressed against on the edge of this pressing plate to locate this pressing plate.

5. the weld jig of circuit board according to claim 4 is characterized in that, this second elastic parts is a spring.

6. the weld jig of circuit board according to claim 4 is characterized in that, the end that this extensible member is positioned at this platen edge has an inclined-plane.

7. the weld jig of circuit board according to claim 6, it is characterized in that, this extensible member position has a pushing portion with respect to an end on this inclined-plane, an end that should pushing portion makes this extensible member have the inclined-plane by pull breaks away from this platen edge, in order to discharging this pressing plate, and this pressing plate is risen by this first elastic parts return.

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