CN111775076A

CN111775076A - Positioning jig

Info

Publication number: CN111775076A
Application number: CN201910263971.8A
Authority: CN
Inventors: 叶敏男; 白光华; 张致良; 卢俊宏
Original assignee: Giga Byte Technology Co Ltd
Current assignee: Giga Byte Technology Co Ltd
Priority date: 2019-04-03
Filing date: 2019-04-03
Publication date: 2020-10-16

Abstract

The invention discloses a positioning jig which is suitable for fixing an object on a circuit board. The positioning fixture comprises a bearing seat, an intermediate plate and an upper cover. The bearing seat is suitable for bearing the circuit board. The intermediate plate covers the circuit board, and the intermediate plate is assembled on the bearing seat. The middle plate has an alignment slot. The upper cover covers the middle plate. The object is suitable for passing through the alignment slot and is positioned on the circuit board, and the upper cover is used for pressing the object so as to fix the object on the circuit board. The invention can accurately and quickly position the object on the circuit board.

Description

Positioning jig

Technical Field

The present invention relates to a jig, and more particularly, to a positioning jig.

Background

Generally, in an optical module, a lens of a photosensitive element and a photosensitive element need to be aligned accurately to avoid image capturing problems. Currently, in the optical product process, a manual positioning method is usually used or an Active Alignment machine (Active Alignment) is purchased to operate the process.

However, if manual positioning is adopted, the method is prone to generate offset, which results in insufficient alignment accuracy and further has the problem of complicated process. If the active alignment machine is selected, the manufacturing cost of the manufacturer will increase due to the very high price of the active alignment machine.

Disclosure of Invention

The invention aims to provide a positioning jig which can accurately and quickly position an object on a circuit board.

In order to achieve the above object, the present invention provides a positioning fixture, which is suitable for fixing an object to a circuit board. The positioning fixture comprises a bearing seat, an intermediate plate and an upper cover. The bearing seat is suitable for bearing the circuit board. The intermediate plate covers the circuit board, and the intermediate plate is assembled on the bearing seat. The middle plate has an alignment slot. The upper cover covers the middle plate. The object is suitable for passing through the alignment slot and is positioned on the circuit board, and the upper cover is used for pressing the object so as to fix the object on the circuit board.

In an embodiment of the invention, one of the bearing seat and the middle plate has a plurality of first positioning holes, and the other one of the bearing seat and the middle plate has a plurality of first positioning posts corresponding to the first positioning holes. The circuit board has a plurality of through holes corresponding to the first positioning holes. The first positioning column is suitable for penetrating through the through hole and being fixed in the first positioning hole, so that the bearing seat, the circuit board and the middle board are positioned mutually.

In an embodiment of the invention, one of the bearing seat and the upper cover has a plurality of second positioning holes, and the other one of the bearing seat and the upper cover has a plurality of second positioning pillars corresponding to the second positioning holes. The bearing seat and the upper cover are mutually positioned by the second positioning hole and the second positioning column.

In an embodiment of the invention, the middle plate includes a plurality of inner walls surrounding the alignment groove and a plurality of concave portions located between the inner walls. Each recess is located between two adjacent ones of the inner walls.

In an embodiment of the invention, the upper cover includes a bottom surface facing the middle plate and at least one pressing member protruding from the bottom surface and corresponding to the object.

In an embodiment of the invention, the at least one pressing element includes a plurality of elastic elements.

In an embodiment of the invention, the middle plate includes an upper surface facing the upper cover. The side of the alignment slot close to the upper surface is provided with a lead angle.

In an embodiment of the invention, the middle plate includes a lower surface opposite to the upper surface and a pressing convex portion protruding from the lower surface and surrounding the alignment slot.

In an embodiment of the invention, the circuit board is provided with a heat sink on a surface facing away from the object. The bearing seat comprises a first surface facing the middle plate and a groove positioned on the first surface, and the shape of the groove corresponds to that of the radiating fin. When the circuit board is placed on the bearing seat, the radiating fins are positioned in the grooves.

In an embodiment of the invention, the carrier includes a second surface opposite to the first surface and a through hole penetrating through the first surface and the second surface. The through hole is communicated with the groove.

Based on the above, the positioning fixture of the invention can configure the circuit board between the middle plate and the bearing seat, and the middle plate further has the alignment slot, so that the object can pass through the alignment slot and be placed on the circuit board, and the object can be accurately and quickly placed at a specific position on the circuit board. In addition, the upper cover can be pressed against the object so that the object is stably fixed on the circuit board. Therefore, the object can be conveniently and accurately placed at a specific position on the circuit board through the positioning jig, and the cost and the time are saved.

In order to make the aforementioned features and advantages of the present invention comprehensible, the present invention is described in detail below with reference to the accompanying drawings and specific examples, but without limiting the present invention thereto.

Drawings

Fig. 1 is an exploded view of a positioning fixture according to an embodiment of the invention.

Fig. 2 is a schematic cross-sectional view of the positioning fixture of fig. 1 after being combined.

Fig. 3 is a perspective view of an intermediate plate of the positioning jig of fig. 1.

Fig. 4 is a perspective view of the middle plate of fig. 3 from another perspective.

Fig. 5 is a schematic top view of the positioning fixture of fig. 1 with the intermediate plate covering the circuit board.

Fig. 6 is another schematic cross-sectional view of the positioning fixture of fig. 1 after being combined.

Fig. 7 is a perspective view of an upper cover of the positioning jig of fig. 1.

Wherein, the reference numbers:

5: article

10: circuit board

12: perforation

100: positioning jig

110: bearing seat

112: first side

114: groove

116: second surface

118: through hole

119: concave part

120: intermediate plate

122: alignment slotting

122 a: positioning mark

123: inner wall

124: concave part

126: upper surface of

127: lead angle

128: lower surface

129: flattening convex part

130: upper cover

132: bottom surface

134: pressing piece

134 a: elastic element

H1: a first positioning hole

H2: second positioning hole

P1: first positioning column

P2: second positioning column

A: axial line

Detailed Description

The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings. Directional terms as referred to in the following examples, for example: the terms "up", "down", "front", "back", "left", "right", etc. refer to the directions of the attached drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting. Also, in the following embodiments, the same or similar elements will be given the same or similar reference numerals.

Fig. 1 is an exploded view of a positioning fixture according to an embodiment of the invention. Referring to fig. 1, in the present embodiment, a positioning fixture 100 is used to fix at least one object 5 on a circuit board 10. The object 5 of the present embodiment is, for example, a lens assembly such as a lens and a lens holder (lens holder), and the circuit board 10 is, for example, a combination of a plurality of rigid-flex boards (rigid-flex boards). The positioning fixture 100 shown in fig. 1 can be used to position a plurality of objects 5 (e.g., lens assemblies) on the circuit board 10 (the rigid-flex boards), and after the objects 5 are fixed (e.g., glued) to the circuit board 10 (the rigid-flex boards), the circuit board 10 can be cut to separate the rigid-flex boards into a plurality of lens modules. Compared with the manual method of positioning the object on the circuit board one by one, the positioning fixture 100 of the present embodiment can provide a faster and more convenient positioning method, and save cost and time.

Of course, in other embodiments, the positioning fixture 100 is not necessarily used to fix the lens assembly (the object 5) on the rigid-flex board, and the positioning fixture 100 may also only position a single object 5 on the circuit board 10, and the present invention does not limit the types and the number of the object 5 and the circuit board 10, and any process that needs to fix the object 5 on the corresponding position on the circuit board 10 may be applied to the positioning fixture of the present invention, and the positioning fixture may have other suitable designs according to actual requirements, and the present invention is not limited thereto. The structure of the positioning jig 100 will be described in detail below.

Fig. 2 is a schematic cross-sectional view of the positioning fixture of fig. 1 after being combined. Referring to fig. 1 to fig. 2, the positioning fixture 100 includes a supporting base 110, a middle plate 120 and an upper cover 130. In the present embodiment, the carrier 110 is used for carrying the circuit board 10. The middle plate 120 is suitable for covering the circuit board 10 along an axis a, and the middle plate 120 is assembled on the carrier base 110 along the axis a. In the present embodiment, the axis a is an imaginary line perpendicular to the supporting base 110, the middle plate 120 and the upper cover 130, and preferably is a central axis of the supporting base 110, and the middle plate 120 and the upper cover 130 are stacked on the supporting base 110 along the extending direction of the axis a.

The intermediate plate 120 has at least one alignment slot 122. In the present embodiment, the middle plate 120 shows a plurality of alignment slots 122 corresponding to the lens assemblies (objects 5). The alignment slot 122 of the middle plate 120 has a function of ensuring and assisting a worker or an automated machine to place the lens assembly (object 5) on the circuit board 10 at a correct position.

In addition, as shown in fig. 1, the carrier 110 has a plurality of first positioning posts P1, the middle plate 120 has a corresponding plurality of first positioning holes H1, and the circuit board 10 has a plurality of through holes 12 corresponding to the first positioning holes H1.

In the present embodiment, the number of the first positioning posts P1, the first positioning holes H1 and the through holes 12 are four, respectively, but the invention is not limited thereto. Therefore, the first positioning posts P1 of the carrier 110 of the present embodiment pass through the through holes 12 of the circuit board 10 and then pass through the first positioning holes H1 of the middle plate 120, so that the carrier 110, the circuit board 10 and the middle plate 120 are mutually positioned.

Based on this design, firstly, when the circuit board 10 is placed, the production line personnel can quickly and accurately place the circuit board 10 on the carrier 110 at the correct position by means of the four through holes 12 on the circuit board 10 and the four first positioning posts P1 on the carrier 110. Furthermore, the four first positioning holes H1 of the middle plate 120 and the four first positioning posts P1 of the carrier 110 are used to quickly and accurately cover the middle plate 120 at the correct position on the circuit board 10 along the axis a, and the alignment slot 122 of the middle plate 120 can be positioned at the correct corresponding position on the circuit board 10.

It should be noted that, in the embodiment, fig. 1 and 2 illustrate that the first positioning pillars P1 are disposed on the susceptor 110, and the first positioning holes H1 are disposed on the middle plate 120. However, in other embodiments, the first positioning holes H1 may be disposed on the carrier seat 110, and the first positioning posts P1 may be disposed on the middle plate 120, which is not limited in the disclosure. That is, the present invention does not limit the number, form and location of the first positioning pillars P1, the first positioning holes H1 and the through holes 12.

In addition, in the present embodiment, the circuit board 10 is provided with a heat sink (not shown) on the surface facing away from the object 5. The carrier 110 includes a first surface 112 facing the middle plate 120 and a second surface 116 opposite to the first surface 112.

In detail, the carrier 110 may include a groove 114 on the first surface 112, and the shape of the groove 114 corresponds to the shape of the heat sink. Therefore, when the circuit board 10 is placed on the carrier 110, the heat sink is located in the groove 114. In addition, in the embodiment, the carrier 110 further includes a through hole 118 penetrating through the first surface 112 and the second surface 116 of the carrier 110 along the axis a, and the through hole 118 is communicated with the groove 114.

Based on this design, when the circuit board 10 of the present embodiment is placed on the carrier 110, the heat sink can be disposed under the circuit board 10 without affecting the adhesion between the circuit board 10 and the carrier 110, and the through holes 118 also have a vacuum breaking function. That is, after the object 5 is fixed on the circuit board 10 by the positioning fixture 100 of the embodiment, for example, by using an adhesive, and baking is completed to cure the adhesive, the through hole 118 can prevent the circuit board 10 from being taken up due to a vacuum absorption effect generated between the circuit board 10 and the carrying base 110, and even the circuit board 10 is damaged.

It should be noted that, in the embodiment, as shown in fig. 1, four grooves 114 of the carrier 110 are illustrated, twelve through holes 118 are illustrated, and two or four through holes 118 are disposed in each groove 114. Of course, in other embodiments, the number of through holes 118, the number of grooves 114, and the form of the grooves 114 may have other suitable forms of design. The number of through holes 118, the number of grooves 114, and the form of the grooves 114 are not limited by the present invention.

In addition, since the circuit board 10 of the embodiment has the heat sink, and the whole thickness of the region where the heat sink is disposed is thicker, the bearing seat 110 of the positioning fixture 100 is designed with the groove 114 corresponding to the heat sink region, so that the whole circuit board 10 can be flatly attached to the bearing seat 110 and is not easy to slide or tilt. In other embodiments, the circuit board 10 may not have a heat sink, and thus the corresponding carrier 110 may not have the groove 114.

In addition, as shown in fig. 1, in the embodiment, the side surface of the carrier 110 optionally has at least one concave portion 119, and the concave portion 119 may be slightly recessed below the circuit board 10, that is, a part of the circuit board 10 covers the concave portion 119. After the positioning fixture 100 is used, the operator can lift the circuit board 10 by the concave part 119 to facilitate the separation of the circuit board 10 from the carrier seat 110. In addition, the concave portion 119 can be conveniently taken by a person or a robot when the part including the carrier 110 or the whole positioning fixture 100 needs to be transported or taken. The concave portion 119 is, for example, a notch. Of course, in other embodiments, the number and the form of the concave portion 119 may have other suitable designs, and the invention is not limited thereto.

Fig. 3 is a perspective view of an intermediate plate of the positioning jig of fig. 1. Referring to fig. 1 and fig. 3, in the present embodiment, the middle plate 120 includes an upper surface 126 facing the upper cover 130 and a lower surface 128 facing the circuit board 10 and opposite to the upper surface 126. Furthermore, the middle plate 120 includes a flattened protrusion 129 protruding from the lower surface 128 and surrounding the alignment slot 122. In detail, when the middle plate 120 covers the circuit board 10, the pressing convex portion 129 of the middle plate 120 contacts and presses the circuit board 10, and performs a preliminary pressing on the circuit board 10 to ensure that the object 5 can be placed more smoothly.

Fig. 4 is a perspective view of the middle plate of fig. 3 from another perspective. Referring to fig. 1 and 4, the alignment slot 122 has a chamfer 127 on a side close to the upper surface 126. Therefore, when the operator or the automated machine is placing the object 5, even if there is an error, the object 5 can be smoothly placed into and pass through the alignment slot 122 by the guiding of the guiding angle 127, so that the operation efficiency of the step of placing the object 5 in the manufacturing process is increased.

Fig. 5 is a schematic top view of the positioning fixture of fig. 1 with the intermediate plate covering the circuit board. Referring to fig. 4 and 5, in the present embodiment, the middle plate 120 includes a plurality of inner walls 123 surrounding the alignment slots 122 and a plurality of recessed portions 124 located between the inner walls 123, and each recessed portion 124 is located between two adjacent inner walls 123. That is, each recess 124 is located at a turn between two adjacent inner walls 123.

Based on this design, the dispensing needle can dispense the circuit board 10 along the inner wall 123 of the alignment slot 122 regardless of whether a mechanical automatic dispensing or a manual dispensing is adopted. The concave portion 124 not only can be used as a buffer and a space for the dispensing needle to move around, so that the dispensing path is a complete rectangle and the dispensing process is smooth, but also can be used as a space for accommodating the excessive glue. Therefore, the inner walls 123 and the recesses 124 of the alignment slot 122 can greatly improve the accuracy and speed of the dispensing operation.

On the other hand, as shown in fig. 4 and fig. 5, in the present embodiment, the alignment slot 122 is slightly larger than the object 5, so as to facilitate the object 5 to be placed in. The middle plate 120 optionally has an alignment mark 122a formed on the lower surface 128 beside the alignment slot 122 to facilitate the operator to know which inner wall 123 the object 5 should be placed in the alignment slot 122 and close to. Further, in the present embodiment, fig. 5 shows that two positioning marks 122a corresponding to each other up and down are symmetrically disposed beside the alignment slot 122. The two positioning marks 122a are located at the left position of the alignment slot 122, so that when the operator places the object 5 (such as a lens), the operator can quickly place the lens at the right position by following the left inner wall 123 of the alignment slot 122 as shown in fig. 5.

Therefore, the design of the positioning mark 122a and the alignment slot 122 greatly improves the disadvantages of eye-force and slow speed when manually placing the small object 5. Of course, in other embodiments, the type, number and position of the positioning marks 122a may be changed according to actual requirements, and the invention is not limited thereto.

Fig. 6 is another schematic cross-sectional view of the positioning fixture of fig. 1 after being combined. Referring to fig. 1 and fig. 6, in the present embodiment, the upper cover 130 covers the middle plate 120 along the axis a and is used for pressing the object 5 to fix the object 5 on the corresponding position on the circuit board 10. Moreover, the susceptor 110 has a plurality of second positioning posts P2, and the upper cover 130 has a plurality of corresponding second positioning holes H2. In the present embodiment, the number of the second positioning posts P2 and the number of the second positioning holes H2 are two. The bearing seat 110 and the upper cover 130 are positioned by two second positioning holes H2 and two corresponding second positioning posts P2.

It should be noted that, in the embodiment, fig. 1 and fig. 6 illustrate that the second positioning posts P2 are disposed on the bearing seat 110, and the second positioning holes H2 are disposed on the upper cover 130. However, in other embodiments, the second positioning holes H2 can also be disposed on the bearing seat 110, and the second positioning posts P2 can also be disposed on the upper cover 130, but not limited thereto. That is, the number, form and position of the second positioning holes P2 and H2 are not limited in the present invention.

Fig. 7 is a perspective view of an upper cover of the positioning jig of fig. 1. Referring to fig. 1 and 7, in the present embodiment, the upper cover 130 includes a bottom surface 132 facing the middle plate 120 and at least one pressing member 134 protruding from the bottom surface 132 and corresponding to the object 5. Further, the pressing element 134 of the present embodiment includes a plurality of elastic elements 134a, and the elastic elements 134a are, for example, pogo pins (pogo pins). In detail, the elastic element 134a of the present embodiment is illustrated as four pogo pins (the elastic element 134 a).

Based on this design, when the top cover 130 covers the middle plate 120, the four pogo pins (the elastic elements 134a) will press the object 5, so that the object 5 is more smoothly attached to the circuit board 10. Thus, if the object 5 is fixed on the circuit board 10 by the adhesive, the position and angle of the object 5 relative to the circuit board 10 can be fixed more accurately during the subsequent baking and curing of the adhesive. For example, as shown in fig. 7, if the object 5 is a lens assembly, the spring pins can press against four corners of the lens frame, so that the optical axis of the lens is perpendicular to the sensor on the circuit board 10, thereby achieving better image quality. Of course, the invention is not limited thereto.

It should be noted that, in other embodiments, the elastic element 134a is not necessarily selected for the pressing element 134, and even if the elastic element 134a is selected, the pogo pin is not necessarily selected. In other words, the pressing element 134 may have other suitable designs, and the invention does not limit the material, number and position of the pressing element 134.

In summary, the positioning jig of the present invention has a middle plate, a bearing seat and an upper cover. The circuit board is placed on the bearing seat, and the middle plate is used for covering the circuit board and is assembled on the bearing seat. Further, the middle plate is also provided with an alignment slot, so that an object can pass through the alignment slot and be placed on the circuit board. Moreover, the alignment notch also has the function of correcting the position, so that the object can be accurately and quickly placed at the correct position. After the object is placed, the upper cover can be pressed against the object and flatten the object, so that the object is stably fixed on the circuit board. On the other hand, the positioning jig greatly improves the speed and the accuracy of manual operation, so that the positioning jig can be accurately and efficiently produced without configuring an expensive automatic alignment machine. Therefore, the positioning jig greatly reduces the process cost.

Although the present invention has been described with reference to the above embodiments, it should be understood that the invention is capable of other embodiments and that various changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. A positioning fixture is suitable for fixing an object on a circuit board, and is characterized by comprising:

a bearing seat suitable for bearing the circuit board;

the middle plate is covered on the circuit board, assembled on the bearing seat and provided with a contraposition slot; and

and the upper cover is covered on the middle plate, wherein the object is suitable for passing through the alignment slot and is positioned on the circuit board, and the upper cover is used for abutting against the object so as to fix the object on the circuit board.

2. The positioning apparatus according to claim 1, wherein one of the carrier and the middle plate has a plurality of first positioning holes, the other one of the carrier and the middle plate has a plurality of first positioning posts corresponding to the first positioning holes, the circuit board has a plurality of through holes corresponding to the first positioning holes, and the first positioning posts are adapted to pass through the through holes and fixed to the first positioning holes, so as to position the carrier, the circuit board and the middle plate relative to each other.

3. The positioning fixture according to claim 1, wherein one of the carrier and the top cover has a plurality of second positioning holes, and the other one of the carrier and the top cover has a plurality of second positioning posts corresponding to the second positioning holes, and the carrier and the top cover are positioned by the second positioning holes and the second positioning posts.

4. The positioning fixture according to claim 1, wherein the middle plate includes a plurality of inner walls surrounding the alignment slot and a plurality of recesses between the inner walls, each recess being located between two adjacent inner walls.

5. The positioning apparatus as claimed in claim 1, wherein the upper cover includes a bottom surface facing the middle plate and at least one pressing member protruding from the bottom surface and corresponding to the object.

6. The positioning fixture of claim 5, wherein the at least one pressing member comprises a plurality of elastic elements.

7. The positioning apparatus as claimed in claim 1, wherein the middle plate includes an upper surface facing the top cover, and the alignment groove has a chamfer on a side thereof adjacent to the upper surface.

8. The positioning fixture of claim 7, wherein the middle plate includes a lower surface opposite to the upper surface and a pressing protrusion protruding from the lower surface and surrounding the alignment slot.

9. The positioning apparatus according to claim 1, wherein the circuit board has a heat sink on a surface thereof facing away from the object, the carrier includes a first surface facing the middle plate and a recess on the first surface, the recess has a shape corresponding to the shape of the heat sink, and the heat sink is disposed in the recess when the circuit board is placed on the carrier.

10. The positioning apparatus according to claim 9, wherein the carrier includes a second surface opposite to the first surface and a through hole passing through the first surface and the second surface, the through hole communicating with the recess.