CN111107716A - Printed circuit board fixture - Google Patents
Printed circuit board fixture Download PDFInfo
- Publication number
- CN111107716A CN111107716A CN202010133150.5A CN202010133150A CN111107716A CN 111107716 A CN111107716 A CN 111107716A CN 202010133150 A CN202010133150 A CN 202010133150A CN 111107716 A CN111107716 A CN 111107716A
- Authority
- CN
- China
- Prior art keywords
- printed circuit
- movable arm
- circuit board
- clamping jaw
- base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/01—Tools for processing; Objects used during processing
- H05K2203/0147—Carriers and holders
- H05K2203/0165—Holder for holding a Printed Circuit Board [PCB] during processing, e.g. during screen printing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The invention discloses a printed circuit board clamping mechanism, which comprises a base, a first movable arm, a second movable arm and a clamping jaw, wherein the first movable arm is arranged on the base; the printed circuit board clamping mechanism clamps and fixes the edge of the printed circuit board in the production process of the printed circuit board, is used for safely and reliably processing the printed circuit board through processing equipment, meets the requirements of reliable clamping of the printed circuit board in the field and the convenience of mounting and dismounting the printed circuit board on and from the clamp, and meets the basic requirements of clamping and fixing the printed circuit board.
Description
Technical Field
The invention relates to the technical field of printed circuit board production, in particular to a printed circuit board clamping mechanism.
Background
In the manufacture of printed circuit boards, plasma treatment, physical vapor deposition, spraying, baking, and the like processes and techniques are used. When the processes are carried out, because of the limitation of equipment, the printed circuit board is often required to be firstly fixed on a corresponding jig, and then the printed circuit board is sent into the equipment together with the jig for processing. Therefore, the jig and the printed circuit board need to withstand the problems of air pressure change, cold and hot impact and deposition of process materials in the process. In order to maintain the economical efficiency of production, the jig needs to be recyclable and to be moved in and out of the apparatus in a reciprocating cycle. This puts a high demand on the reliability of the jig, especially on the stability of the jig in the clamping and fixing of the printed circuit board.
One way to hold a printed circuit board is by spring clip. The mode has the advantages of simple structure, low cost and simple and convenient operation, and is widely applied to the field of printed circuit board production. However, the spring is so specific that its elastic force is not always maintained in a good condition during continuous use, especially after cold and hot shock. Therefore, after the clamping device is used for a period of time, the thin printed circuit board cannot be clamped stably, and the board is easy to fall off. Therefore, the spring needs to be replaced frequently, and the economical efficiency is lost. On the other hand, due to the principle of the spring itself, the elastic force of the spring is proportional to the stroke of compression or rotation, and the clamping force applied on the printed circuit boards with different thicknesses is different. In order to clamp the thin plate, a spring with high coefficient of stiffness is needed, so that the clamping force needed when the thick plate is clamped is too large, and the plate loading efficiency is affected.
Another common way of clamping a printed circuit board is the dowel method. The method is that a certain number of round holes are drilled on the process frame of the printed circuit board in advance to be used as positioning holes, and the fixture is provided with fine needles with the same number and the same positions to be used as positioning pins. The positioning hole on the printed circuit board is sleeved into the positioning pin, and the top of the positioning pin is covered so that the printed circuit board can not be separated from the positioning pin to complete stable clamping. The method is simple and effective, has no reliability problem of spring clamp fixing, but also has great limitation. Firstly, the method needs to drill holes on the process frame of the printed circuit board, a plan is made in the design and typesetting stage of the printed circuit board, and the holes need to be drilled again after the printed circuit board is pressed once, so that a process is added to the production flow by virtue of the vacancy. Secondly, considering the expansion and shrinkage characteristics of the printed circuit board and the high efficiency of manual or mechanical upper and lower plates, the size of the positioning hole cannot be too small, and the process frame with limited occupied area is extruded, so that the positioning holes or patterns for other purposes are arranged.
Therefore, there is a need for a reliable clamping method that can be adapted to different thicknesses of printed circuit boards without affecting the existing production process.
Disclosure of Invention
In order to overcome the defects, the invention provides a printed circuit board clamping mechanism which clamps and fixes the edge of the printed circuit board in the production process of the printed circuit board and is used for safely and reliably processing the printed circuit board through processing equipment.
The technical scheme adopted by the invention for solving the technical problem is as follows: a printed circuit board clamping mechanism comprises a base, a first movable arm arranged on the base, a second movable arm arranged on the first movable arm, and a clamping jaw arranged on the second movable arm;
the first movable arm can be opened and closed relative to the base, and when the first movable arm is opened under the action of external force, the printed circuit board can be installed on the base or taken down from the base; when the printed circuit board is closed under the action of external force, the printed circuit board is clamped by the whole clamping mechanism and cannot be separated;
the second movable arm is arranged on the first movable arm, the function of the second movable arm is to enable the whole clamping mechanism to be adaptive to different thicknesses of the printed circuit boards, when the printed circuit boards with different thicknesses are clamped, the first movable arm is always in a closed final position, and the second movable arm and the first movable arm form different relative angles according to the thicknesses of the printed circuit boards;
the clamping jaw is arranged on the second movable arm and can rotate relative to the second movable arm through a clamping jaw rotating shaft, and a plurality of sharp teeth protruding inwards are arranged at the contact position of the tail end of the clamping jaw and the printed circuit board. When the printed circuit board is pressed by the clamping jaw, if the printed circuit board has an outward movement trend, the sharp teeth on the clamping jaw pull the printed circuit board, so that the clamping jaw has a counterclockwise movement trend and is limited by the limiting pin to move, and the printed circuit board cannot be separated from the clamping mechanism;
as a further improvement of the present invention, a spring is installed on the rotating shaft of the second movable arm moving relative to the first movable arm, so that the second movable arm always tends to rotate clockwise relative to the first movable arm.
As a further development of the invention, the range of rotation is however limited by the limit pin on the second movable arm and the arc-shaped groove on the clamping jaw.
As a further improvement of the invention, the lines formed by connecting the tips of the sharp teeth on the clamping jaw are arc-shaped, so that the clamping jaw can adapt to different thicknesses of the printed circuit board, and the direction of the sharp teeth inclines towards the inner side of the base, so that the clamping jaw is driven to move by being opposite to the sharp teeth when the printed circuit board is separated from the base outwards in parallel.
The invention has the beneficial effects that: the printed circuit board clamping mechanism clamps and fixes the edge of the printed circuit board in the production process of the printed circuit board, is used for safely and reliably processing the printed circuit board through processing equipment, meets the requirements of reliable clamping of the printed circuit board in the field and the convenience of mounting and dismounting the printed circuit board on and from the clamp, and meets the basic requirements of clamping and fixing the printed circuit board.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the present invention showing the first movable arm in an open position;
FIGS. 3A and B are schematic diagrams illustrating a state where the structure of the present invention holds printed circuit boards of different thicknesses;
FIG. 4 is a functional illustration of the inventive structure holding a printed circuit board;
the following are marked in the figure: 1.1, a first movable arm, 1.2, a first movable arm rotating shaft, 1.3, a second movable arm, 1.4, a second movable arm rotating shaft, 1.5, a clamping jaw, 1.6, a clamping jaw rotating shaft, 1.7, a sharp tooth, 1.8, a limiting pin, 1.9, a limiting groove, 1.10 and a base; 1.11, printed circuit board.
Detailed Description
For the purpose of enhancing the understanding of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
As shown in fig. 1, the clamping mechanism comprises a base 1.10, on which base 1.10 a first movable arm 1.1 is mounted, which is mounted via a first movable arm pivot 1.2 and can rotate around it, as shown in fig. 2. The second movable arm 1.3 is mounted on the first movable arm 1.1 through a second movable arm spindle 1.4, and the second movable arm can rotate around the second movable arm spindle 1.4, as shown in fig. 3A and B; the clamping jaw 1.5 is installed on the second movable arm 1.3 through the rotating shaft 1.6, and the movement of the clamping jaw 1.5 is limited to rotate in a small range by a positioning pin 1.8 on the second movable arm 1.3 and a limiting groove 1.9 of the clamping jaw 1.5.
When the printed circuit board needs to be mounted or dismounted, the first movable arm 1.1 is opened by external force, as shown in fig. 2. When printed circuit boards with different thicknesses are installed, the first movable arm 1.1 can be always in a closed position, and the printed circuit boards with different thicknesses are matched by the rotation of the second movable arm 1.3, as shown in fig. 3A and 3B.
As shown in fig. 4, when the printed circuit board 1.11 is clamped by the clamping mechanism and then is subjected to an outward pulling force (arrow direction) parallel to the base, the sharp teeth on the clamping jaw 1.5 will bite the printed circuit board 1.11, so that the outward movement of the printed circuit board 1.11 will inevitably drive the rotation of the clamping jaw 1.5. The clamping jaw 1.5 is limited by the limiting pin 1.8 and the limiting groove 1.9 to rotate only in a small range, so that the printed circuit board 1.11 is limited finally and cannot move outwards continuously, and the printed circuit board is prevented from being separated. It is thus achieved that the removal of the printed circuit board 1.11 can only take place by lifting the first movable arm 1.1. Therefore, the first movable arm 1.1 does not need to apply downward pressure to the printed circuit board, and only needs to be capable of keeping a closed position in the whole process, so that the opening and closing and holding mechanism of the first movable arm 1.1 is simplified. The plate-taking action therefore only requires opening the first movable arm 1.1 and the opening process does not need to overcome strong mechanical forces like spring clamps.
Claims (4)
1. The utility model provides a printed circuit board fixture which characterized in that: comprises a base (1.10), a first movable arm (1.1) arranged on the base (1.10), a second movable arm (1.3) arranged on the first movable arm (1.1), and a clamping jaw (1.5) arranged on the second movable arm (1.3);
the first movable arm (1.1) can be opened and closed relative to the base (1.10), and when the first movable arm is opened under the action of external force, the printed circuit board (1.11) can be installed on or taken down from the base;
the second movable arm (1.3) is arranged on the first movable arm (1.1) and rotates relative to the first movable arm (1.1), and the second movable arm (1.3) has the function of enabling the whole clamping mechanism to be adaptive to different thicknesses of the printed circuit boards;
the clamping jaw (1.5) is arranged on the second movable arm (1.3) and rotates relative to the second movable arm (1.3) through a clamping jaw rotating shaft (1.6), and a plurality of sharp teeth (1.7) protruding inwards are arranged at the contact position of the tail end of the clamping jaw (1.5) and the printed circuit board.
2. A printed circuit board clamping mechanism as claimed in claim 1, wherein: and a spring is arranged on a rotating shaft of the second movable arm (1.3) moving relative to the first movable arm (1.1), so that the second movable arm (1.3) always has a clockwise rotation trend relative to the first movable arm (1.3).
3. A printed circuit board clamping mechanism as claimed in claim 1, wherein: the rotating range of the clamping jaw (1.5) is limited by a limiting pin (1.8) on the second movable arm (1.3) and an arc-shaped groove (1.9) on the clamping jaw (1.5).
4. A printed circuit board clamping mechanism as claimed in claim 1, wherein: the sharp teeth (1.7) on the clamping jaw (1.5) are arc-shaped, so that the clamping jaw can adapt to different thicknesses of printed circuit boards, and the direction of the sharp teeth inclines towards the inner side of the base, so that the printed circuit board is opposite to the sharp teeth to drive the clamping jaw to move when the printed circuit board is parallel to the base and is separated outwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010133150.5A CN111107716A (en) | 2020-03-01 | 2020-03-01 | Printed circuit board fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010133150.5A CN111107716A (en) | 2020-03-01 | 2020-03-01 | Printed circuit board fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111107716A true CN111107716A (en) | 2020-05-05 |
Family
ID=70428165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010133150.5A Pending CN111107716A (en) | 2020-03-01 | 2020-03-01 | Printed circuit board fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111107716A (en) |
-
2020
- 2020-03-01 CN CN202010133150.5A patent/CN111107716A/en active Pending
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |