External clamping jig for surface mounting of circuit board

Abstract

The utility model discloses an external clamping jig for circuit board surface mounting, which comprises an upper jig and a lower jig which can be buckled with each other, the upper jig is provided with a surface mounting opening corresponding to a surface mounting area of a circuit board, and the bottom of the upper jig is provided with an upper boss corresponding to a non-surface mounting area of the circuit board; the top of the lower jig is provided with a positioning groove corresponding to the outline of the circuit board, and the interior of the positioning groove is provided with a lower boss corresponding to the patch position and the non-patch position of the circuit board; according to the utility model, the upper end face and the lower end face of the circuit board can be stably positioned and clamped, meanwhile, heat generated by the circuit board can be quickly conducted to the external environment in the patch welding process of the circuit board, and the circuit board is prevented from being curled and deformed due to high temperature.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit board patch processing and relates to an external clamping fixture for circuit board patches. Background Art

[0002] Surface mount processing of circuit boards refers to installing surface mount components without pins or short leads on the surface of the circuit board, and connecting and assembling the components to the circuit board by welding. For ultra-thin circuit boards, such as ultra-thin PCB boards, when the circuit boards are welded during the patch process, the ultra-thin circuit boards are very likely to be partially warped and deformed under the influence of high temperature, thus causing the circuit boards to be scrapped. In particular, the existing circuit board patch processing positioning fixtures usually clamp and fix the upper and lower surfaces of the circuit board by an upper fixture and a lower fixture, and the fixed space between the upper fixture and the lower fixture is relatively closed, which makes it more difficult for the heat generated during the circuit board patch welding process to dissipate, further causing the problem of thermal deformation of the circuit board.

[0003] Therefore, in order to solve the technical problem that the existing circuit board patch processing fixing fixture is difficult to quickly dissipate the heat of the circuit board, causing the circuit board to easily curl and deform, the utility model discloses an external clamping fixture for circuit board patches. Utility Model Content

[0004] The purpose of the utility model is to provide an external clamping fixture for circuit board patches, which can firmly position and clamp the upper and lower end surfaces of the circuit board, and can quickly conduct the heat generated by the circuit board to the external environment during the patch welding process of the circuit board, so as to avoid the circuit board from curling and deforming due to high temperature.

[0005] The utility model is realized by the following technical solutions:

[0006] An external clamping jig for circuit board patches comprises an upper jig and a lower jig which can be interlocked with each other, wherein the upper jig is provided with a patch opening corresponding to the patch area of ​​the circuit board, and the bottom of the upper jig is provided with an upper boss corresponding to the non-patch area of ​​the circuit board; the top of the lower jig is provided with a positioning groove corresponding to the contour of the circuit board, and the interior of the positioning groove is provided with a lower boss corresponding to the patch position and the non-patch position of the circuit board.

[0007] The circuit board is placed in the positioning groove at the top of the lower fixture, and the positioning of the circuit board is achieved by matching the positioning groove with the contour of the circuit board. At the same time, the patch position and non-patch position at the bottom of the circuit board are supported and reinforced by the lower boss inside the positioning groove. Then the upper fixture is snap-fitted and installed on the top of the lower fixture, and the upper boss at the bottom of the upper fixture presses the non-patch area at the top of the circuit board downward, thereby achieving the fixation of the circuit board between the upper fixture and the lower fixture, effectively avoiding the movement of the circuit board during the subsequent patch operation. At the same time, a patch opening is provided on the patch area of ​​the upper fixture corresponding to the circuit board to reserve sufficient patch operation space, and the patch device can perform patch operation on the circuit board through the patch opening. At the same time, the upper boss in contact with the top of the circuit board and the lower boss in contact with the bottom of the circuit board can conduct the heat generated by the circuit board during the patch process to the external environment, and the upper fixture and the lower fixture clamp the circuit board, thereby effectively avoiding the circuit board from curling and deforming due to the influence of temperature.

[0008] In order to better realize the utility model, further, an upper mounting opening is provided at the bottom of the upper fixture corresponding to the non-patch area of ​​the circuit board, and an upper boss is installed in the upper mounting opening.

[0009] In order to better realize the utility model, further, the upper boss is made of heat-conducting material, and at least one upper vent is correspondingly provided on the upper fixture and the upper boss.

[0010] In order to better realize the utility model, further, visual inspection holes are correspondingly arranged on the upper fixture and the lower fixture.

[0011] In order to better realize the utility model, further, the lower fixture is provided with a lower mounting opening corresponding to the patch position and the non-patch position of the circuit board, and a lower boss is installed in the lower mounting opening.

[0012] In order to better realize the utility model, further, the lower boss is made of heat-conducting material, and at least one lower air vent is correspondingly provided on the lower fixture and the lower boss.

[0013] In order to better realize the utility model, further, a positioning column is provided at the edge of the positioning groove on the top of the lower fixture, and a positioning hole which cooperates with the positioning column and is plugged into the edge of the upper fixture.

[0014] In order to better realize the utility model, further, an upper magnetic attraction portion is provided at the edge of the upper fixture, and a lower magnetic attraction portion that magnetically attracts the upper magnetic attraction portion is provided at the edge of the lower fixture.

[0015] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0016] (1) The utility model provides an upper jig and a lower jig that can be buckled with each other on the upper and lower end surfaces of the circuit board, respectively. The circuit board is clamped and fixed on both sides by the buckling of the upper jig and the lower jig, thereby ensuring the stability of the circuit board during the patch processing;

[0017] (2) The utility model provides an upper boss at the bottom of the upper fixture corresponding to the non-patch area of ​​the circuit board, and provides a lower boss at the top of the lower fixture corresponding to the patch area and the non-patch area of ​​the circuit board. The circuit board is supported by the lower boss, and the circuit board is pressed and fixed by the upper boss while reserving space for patch processing. At the same time, the heat of the circuit board is quickly transferred to the external environment through the upper boss and the lower boss, so as to avoid the circuit board from curling and deforming due to excessive temperature.

[0018] (3) The utility model provides upper air vents on the upper boss and the upper fixture, and provides lower air vents on the lower boss and the lower fixture, thereby ensuring air circulation between the internal environment of the fixture and the external environment. This further assists in dissipating heat from the circuit board to the external space, thereby effectively preventing the circuit board from curling and deforming. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of an external clamping fixture for circuit board patch;

[0020] Figure 2 The schematic diagram of the installation of the upper boss on the upper fixture;

[0021] Figure 3 It is a schematic diagram of the installation of the lower boss at the lower fixture;

[0022] Figure 4 It is a schematic diagram of the assembly of the upper jig and the lower jig;

[0023] Figure 5 It is a schematic diagram of the upper boss and the lower boss clamping the circuit board.

[0024] Among them: 1-upper fixture; 2-lower fixture; 3-patch opening; 4-upper boss; 5-positioning groove; 6-lower boss; 7-visual inspection hole; 8-positioning hole; 9-positioning column; 001-upper magnetic attraction part; 002-lower magnetic attraction part; 100-upper installation port; 101-upper ventilation port; 200-lower installation port; 201-lower ventilation port. DETAILED DESCRIPTION

[0025] The following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the utility model explicitly states otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0027] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0028] Terminology explanation section: The terms "install", "connect", "connect", "fixed" and so on in the present utility model should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0029] Embodiment 1:

[0030] An external clamping fixture for a circuit board patch according to this embodiment, such as Figure 1-Figure 4 As shown, it includes an upper jig 1 and a lower jig 2 that can be interlocked, the upper jig 1 is provided with a patch opening 3 corresponding to the patch area of ​​the circuit board, and the bottom of the upper jig 1 is provided with an upper boss 4 corresponding to the non-patch area of ​​the circuit board; the top of the lower jig 2 is provided with a positioning groove 5 corresponding to the contour of the circuit board, and the interior of the positioning groove 5 is provided with a lower boss 6 corresponding to the patch position and non-patch position of the circuit board.

[0031] After the upper fixture 1 and the lower fixture 2 are buckled and installed, an inner cavity for clamping and fixing the circuit board is formed between the upper fixture 1 and the lower fixture 2, which prevents the circuit board from moving during the subsequent patch process, thereby ensuring the patch accuracy of the circuit board. The steps for clamping and fixing the circuit board by the upper fixture 1 and the lower fixture 2 are as follows:

[0032] Step 1: Place the circuit board inside the positioning groove 5 at the top of the lower fixture 2. At this time, the outline of the circuit board matches the sidewall outline of the positioning groove 5, thereby realizing the positioning of the circuit board in the lower fixture 2. At the same time, the top of the lower boss 6 protruding upward inside the positioning groove 5 contacts the patch area and non-patch area at the bottom of the circuit board to achieve support and reinforcement of the circuit board. The top of the lower boss 6 protruding upward is higher than the bottom surface of the positioning groove 5, thereby reserving sufficient heat dissipation space at the bottom of the circuit board;

[0033] Step 2, snap-fit ​​the upper jig 1 onto the top of the lower jig 2, so that the upper boss 4 at the bottom of the upper jig 1 presses the non-patch area on the top of the circuit board downward to further fix the circuit board; at this time, the patch opening 3 on the upper jig 1 corresponds to the patch area of ​​the circuit board;

[0034] Step 3, the patch device performs patch operation on the circuit board through the patch opening 3. During the patch operation, the heat generated by the circuit board is conducted to the external environment through the upper boss 4 and the lower boss 6, thereby preventing the circuit board from curling due to excessive temperature.

[0035] Embodiment 2:

[0036] An external clamping fixture for circuit board patch is improved on the basis of embodiment 1, such as Figure 2 As shown, an upper mounting opening 100 is provided at the bottom of the upper fixture 1 corresponding to the non-patch area of ​​the circuit board, and an upper boss 4 is installed in the upper mounting opening 100 .

[0037] The upper mounting opening 100 is a stepped opening, and the upper boss 4 is provided with a stepped boss corresponding to the upper mounting opening 100, so that the upper boss 4 can be detachably positioned and installed inside the upper mounting opening 100. One end of the upper boss 4 extends toward the lower fixture 2 and contacts the non-patch area at the top of the circuit board, and the top of the circuit board is pressed and positioned by the upper boss 4. At the same time, the heat generated during the patch process of the circuit board is conducted to the external environment by the upper boss 4, so as to avoid deformation of the circuit board caused by excessive local temperature of the circuit board.

[0038] Furthermore, the upper boss 4 is made of heat-conducting material, and at least one upper air vent 101 is correspondingly provided on the upper fixture 1 and the upper boss 4. The upper air vent 101 facilitates the circulation of air from the external environment and air inside the fixture, and can dissipate heat on the circuit board to the external environment more quickly.

[0039] The other parts of this embodiment are the same as those of Embodiment 1, and thus will not be described in detail.

[0040] Embodiment 3:

[0041] An external clamping fixture for circuit board patch is improved on the basis of embodiment 1 or 2, such as Figure 1 As shown, visual inspection holes 7 are correspondingly provided on the upper fixture 1 and the lower fixture 2 .

[0042] The visual inspection hole 7 is used to cooperate with the external visual inspection CCD camera for shooting and positioning. The visual inspection hole 7 on the upper fixture 1 and the lower fixture 2 is axially photographed by the visual inspection CCD camera, and the coaxiality of the visual inspection hole 7 on the upper fixture 1 and the visual inspection hole 7 on the lower fixture 2 is calculated through the photographed image. The coaxiality can be used to determine whether the snap-fit ​​alignment error between the upper fixture 1 and the lower fixture 2 meets the standard.

[0043] The other parts of this embodiment are the same as those of Embodiment 1 or 2, and thus will not be described in detail.

[0044] Embodiment 4:

[0045] An external clamping fixture for circuit board patch is improved on the basis of any one of embodiments 1-3, such as Figure 3 As shown, the lower fixture 2 is provided with a lower mounting opening 200 corresponding to the patch position and the non-patch position of the circuit board, and the lower mounting opening 200 is installed with a lower boss 6 .

[0046] The lower mounting opening 200 is a stepped opening, and the lower boss 6 is provided with a stepped boss corresponding to the lower mounting opening 200, so as to realize the detachable positioning installation of the lower boss 6 inside the lower mounting opening 200. One end of the lower boss 6 extends toward the upper fixture 1 and contacts with the non-patch area and the patch area at the bottom of the circuit board, and the bottom of the circuit board is supported and positioned by the lower boss 6. At the same time, the heat generated during the patch process of the circuit board is conducted to the external environment by the lower boss 6, so as to avoid deformation of the circuit board caused by excessive local temperature of the circuit board.

[0047] Furthermore, the lower boss 6 is made of heat-conducting material, and at least one lower vent 201 is correspondingly provided on the lower fixture 2 and the lower boss 6. The lower vent 201 facilitates the air circulation between the external environment and the air inside the fixture, and can dissipate the heat on the circuit board to the external environment more quickly.

[0048] The other parts of this embodiment are the same as any one of Embodiments 1-3, so they are not described again.

[0049] Embodiment 5:

[0050] An external clamping fixture for circuit board patch, improved on the basis of any one of embodiments 1-4, such as Figure 1 Shown and Figure 5As shown, a positioning column 9 is provided at the top of the lower jig 2 at the edge of the positioning groove 5, and a positioning hole 8 is provided at the edge of the upper jig 1 to be plugged with the positioning column 9. In the process of buckling the upper jig 1 and the lower jig 2, the positioning column 9 is inserted into the inside of the positioning hole 8, and the buckling of the upper jig 1 and the lower jig 2 is guided by the sliding guide cooperation between the positioning column 9 and the positioning hole 8, so as to avoid the buckling error between the upper jig 1 and the lower jig 2 from exceeding the tolerance.

[0051] Furthermore, an upper magnetic attraction portion 001 is provided at the edge of the upper jig 1, and a lower magnetic attraction portion 002 that is magnetically attracted to the upper magnetic attraction portion 001 is provided at the edge of the lower jig 2. A plurality of upper mounting holes are provided at the edge of the bottom of the upper jig 1, and the upper magnetic attraction portion 001 is installed in the upper mounting holes; a plurality of lower mounting holes are provided at the edge of the top of the lower jig 2, and the lower magnetic attraction portion 002 is installed in the lower mounting holes. Through the rapid magnetic attraction between the upper magnetic attraction portion 001 and the lower magnetic attraction portion 002, the upper jig 1 and the lower jig 2 are fast and tightly fastened, and the fastening stability of the upper jig 1 and the lower jig 2 is ensured during the subsequent circuit board patch process, thereby avoiding movement between the upper jig 1 and the lower jig 2.

[0052] The other parts of this embodiment are the same as any one of Embodiments 1-4, so they are not described again.

[0053] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.

Claims

1. An external clamping fixture for circuit board patch, comprising an upper fixture (1) and a lower fixture (2) that can be interlocked, characterized in that: The upper jig (1) is provided with a patch opening (3) corresponding to the patch area of ​​the circuit board, and the bottom of the upper jig (1) is provided with an upper boss (4) corresponding to the non-patch area of ​​the circuit board; the top of the lower jig (2) is provided with a positioning groove (5) corresponding to the outline of the circuit board, and the interior of the positioning groove (5) is provided with a lower boss (6) corresponding to the patch position and the non-patch position of the circuit board.

2. The external clamping fixture for circuit board patch according to claim 1, characterized in that: An upper mounting opening (100) is provided at the bottom of the upper fixture (1) corresponding to a non-chip region of the circuit board, and an upper boss (4) is mounted in the upper mounting opening (100).

3. The external clamping fixture for circuit board patch according to claim 2, characterized in that: The upper boss (4) is made of a heat-conducting material, and at least one upper vent (101) is correspondingly provided on the upper fixture (1) and the upper boss (4).

4. The external clamping fixture for circuit board patch according to claim 3, characterized in that: At least one visual inspection hole (7) is correspondingly provided on the upper jig (1) and the lower jig (2).

5. An external clamping fixture for circuit board patch according to any one of claims 1 to 4, characterized in that: The lower fixture (2) is provided with a lower mounting opening (200) corresponding to the patch position and the non-patch position of the circuit board, and a lower boss (6) is installed in the lower mounting opening (200).

6. The external clamping fixture for circuit board patch according to claim 5, characterized in that: The lower boss (6) is made of a heat-conducting material, and at least one lower vent (201) is correspondingly provided on the lower fixture (2) and the lower boss (6).

7. An external clamping fixture for circuit board patch according to any one of claims 1 to 4, characterized in that: A positioning column (9) is provided at the top of the lower jig (2) at the edge of the positioning groove (5), and a positioning hole (8) that cooperates with the positioning column (9) is provided at the edge of the upper jig (1).

8. The external clamping fixture for circuit board patch according to claim 7, characterized in that: An upper magnetic attraction portion (001) is provided at the edge of the upper fixture (1), and a lower magnetic attraction portion (002) magnetically attracted to the upper magnetic attraction portion (001) is provided at the edge of the lower fixture (2).

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