JP2008166014A - Method of bending work of pin connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for bending a shaft in a pin connector capable of accurately bending it at a predetermined angle, in a bending jig for externally bending the shaft of the pin connector. <P>SOLUTION: The shaft of the pin connector has an extension 123, an external flexure 124 externally bent at a first bending point 121 in the extremity of the extension, and a parallel portion 126 bent in a direction parallel to the extension 123 at a second bending point 122 in the extremity of the external flexure. The method for bending the pin connector includes a step for externally bending the external flexure 124 at the first bending point 121 in the holding state of the extension 123 with respect to the shaft 12 of the linear pin connector, and bending the parallel portion 126 in the direction parallel to the extension 123 without holding it at the second bending point 122. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for bending a contact pin used as a connector, and more particularly, to a method for bending a pin connector for electrically connecting an electrode terminal formed on an electrode substrate of a display element and an external device. Is.

  Conventionally, a pin connector has been used to electrically connect a liquid crystal display element and an external device. In the pin connector, the electrode terminal portion formed on the transparent electrode substrate in the manufacturing process of the liquid crystal display element is sandwiched between the clip portions of the pin connector and fixed using resin. Here, the process of connecting the liquid crystal display element to the external device will be described in detail. The shaft portion of the pin connector is inserted into a socket or the like and fixed to the circuit board of the external device, and thereby the liquid crystal display element and the external device are connected via the pin connector. The device is securely connected electrically.

  In addition, when a liquid crystal display element is attached to an external device via a pin connector, the liquid crystal display element is mounted in the vicinity of the external device in order to eliminate a useless space and to design a module as compact as possible. There are many cases where the pin connector shaft is bent and used.

  Here, Patent Document 1 proposes a technique for bending a contact pin for connecting a circuit of a printed wiring board to another circuit to an appropriate angle by a rotating jig.

  FIG. 4A shows the pin connector shaft portion 12 connected to the electrode terminal portion of the liquid crystal substrate 11 in the liquid crystal display element 1 with respect to the external electrode 4. Shows the state. FIG. 4B shows a pin connector shaft portion 12 connected to the electrode terminal portion of the liquid crystal substrate 11 in the liquid crystal display element 1 with respect to the external electrode 4. The attached state is shown. As is apparent from FIG. 4, the entire device is very compact by bending and attaching the shaft portion 12 of the pin connector. Here, bending of the pin connector is performed using a bending jig mold.

  FIG. 6 shows a bending jig mold 100 for bending the shaft portion 12 of the pin connector. As shown in FIG. 6, the lower mold 2 includes a fixing portion 21 that maintains the pin connector shaft portion 12 extending in the vertical direction from one end of the liquid crystal substrate 11 and a recess 22. The upper mold 3 has a concave portion 31 that fits into the fixing portion 21 of the lower mold 2 and a convex portion 32 that fits into the concave portion 22 of the lower mold 2. In this way, when the shaft 12 of the pin connector is set horizontally on the lower mold 2 and the upper mold 3 is lowered and pressed by the convex portion 32 at the tip, as shown in FIG. An internally bent pin connector shaft 12 having a first bent portion 121 and a second bent portion 122 is completed.

  Here, the principle by which the shaft connector 12 of the pin connector is bent inward will be described in detail with reference to FIG. 6. The tip of the concave portion 22 of the lower die 2 while being pushed by the convex portion 32 of the tip of the upper die 3. The first bent portion 121 and the second bent portion 122 of the shaft portion 12 of the pin connector are formed at the same time at the portion 23 located at the position. Therefore, the shaft portion 12 of the pin connector bent inward at a predetermined angle without springback or the like is completed.

  Next, FIG. 7 shows a bending jig mold 101 for bending the shaft portion 12 of the pin connector 11 outward. As shown in FIG. 7, the lower mold 2 is a movable suction that maintains the pin connector shaft portion 12 connected to the electrode terminal portion of the liquid crystal substrate 11 in the liquid crystal display element 1 and extending in the vertical direction horizontally. It has the board 24 and the convex part 25. FIG. Further, the upper mold 3 has a convex portion 33 fitted to the suction plate 24 of the lower mold 2 and a concave portion 34 fitted to the convex portion 25 of the lower mold 2. In this manner, with the shaft portion 12 of the pin connector set horizontally on the lower mold 2, the upper mold 3 is lowered and brought into contact with the suction plate 24 of the lower mold 2, and then the suction plate 24 is moved. The pin connector 11 is pressed while being lowered, and further pressed to the convex portion 25. By doing so, the externally bent pin connector 11 is completed, but it is difficult to design at a predetermined angle. FIG. 5A shows the shaft 12 of the pin connector that is bent outward by the bending jig mold 101.

  As shown in FIG. 5 (a), the shaft connector 12 has a pin connector shaft portion 12 that extends outward from one end of the liquid crystal substrate 11 in the vertical direction and a first refraction point 121 at the tip of the extension portion 123. And a bent portion 125 bent inward with respect to the extending portion 123 at the second refraction point 122 at the tip of the outer bent portion 124 is formed.

  Here, the principle that the bent portion 125 of the shaft portion 12 of the pin connector is bent inward with respect to the extending portion 123 will be described in detail with reference to FIGS. As shown in FIG. 7, the pin connector shaft portion 12 extending in the vertical direction from one end of the liquid crystal substrate 11 is disposed horizontally on the lower mold 2 including the suction plate 24 and the convex portion 25. Then, the upper mold 3 is lowered. Next, as shown in FIG. 8, when the convex portion 33 of the upper mold 3 and the suction plate 24 of the lower mold 2 come into contact, the convex portion 33 of the upper mold 3 and the suction plate 24 of the lower mold 2. Then, the extension part 123 in a predetermined range is sandwiched from the connection part of the shaft part 12 of the pin connector, and the horizontal setting state is maintained, and only the suction plate 24 of the lower mold 2 is matched with the lowering of the upper mold 3. Descends. Here, the convex portion 25 of the lower mold 2 is fixed and does not move. Next, the remaining portion of the shaft portion 12 of the pin connector is pushed by the convex portion 25 at the tip of the lower die 2 and the concave portion 34 of the upper die 3 while being pushed to the tip of the convex portion 25 of the lower die 2. The first refraction point 121 and the second refraction point 122 of the shaft portion 12 of the pin connector are formed at the same time when the portion 26 is located. FIG. 9 shows a state in which the upper mold 3 and the lower mold 2 are thus fitted.

  Here, since the extension part 123 of the shaft part 12 of the pin connector is sandwiched between the convex part 33 of the upper mold 3 and the suction plate 24 of the lower mold 2, it begins to bend at the part 26 and is later bent outward 124. The force that pulls the part becomes. Therefore, if the upper mold 3 and the lower mold 2 are released, a force for returning to the outer bent portion 124 acts, and the extending portion 123 at the second refraction point 122 as shown in FIG. Accordingly, a bent portion 125 bent inward is formed. Therefore, when the liquid crystal display element 1 bent outward by the bending jig mold 101 is used, the module cannot be designed with high accuracy, and the process of connecting the liquid crystal display element 1 to the external device 4 is made compact. I couldn't design it.

JP-A-11-135227

  As described above, the lower mold 2 has the movable suction plate 24 that keeps the shaft portion 12 of the pin connector of the liquid crystal display element 1 horizontal, the convex portion 25 of the lower mold 2, and the upper mold In the bending jig mold 101 for externally bending the pin connector shaft 12, the bent portion 125 of the pin connector shaft 12 is parallel to the extending portion 123. Could not be bent to an angle. Therefore, the module cannot be designed with high accuracy, and the process of connecting the liquid crystal display element 1 to the external device 4 cannot be designed in a compact manner.

The present invention was made against the background of such circumstances, the purpose of the present invention is
It is an object of the present invention to provide a bending method for a pin connector that can bend the shaft portion of the pin connector accurately at a predetermined angle in a bending jig mold for bending the shaft portion of the pin connector.

  An external bending method for a pin connector according to the present invention includes an extending portion extending in a direction perpendicular to a substrate of a display element from one end of the display element, and an outer side at a first refraction point at a tip of the extending portion. An outer bending method for an axial portion of a pin connector having an outer bent portion bent outward and a parallel portion bent in a direction parallel to the extending portion at a second refraction point at the tip of the outer bent portion. The extension portion, the outer bending portion, and the parallel portion are arranged in a state in which the extension portion is held in a state where the extension portion is held with respect to the shaft portion of the linear pin connector before being formed. It is characterized by bending outward at a refraction point and bending the parallel part in a non-holding state at the second refraction point in a direction parallel to the extension part.

  Such an outer bending method of the pin connector can bend the shaft portion of the pin connector accurately at a predetermined angle. Therefore, the module can be designed with high accuracy, and the process of connecting the display element to the external device can be designed in a compact manner.

  Further, as such an external bending method of the pin connector, when a mold is used in the external bending of the shaft portion of the pin connector, the interval of the gap between the molds sandwiching the parallel portion is determined by the shaft portion of the pin connector. It may be configured to form a non-holding state by making it larger than the thickness dimension. With such a configuration, the module can be designed with high accuracy, and the process of connecting the display element to the external device can be designed in a compact manner.

  Further, as such an external bending method for the pin connector, the gap may be configured such that the gap can be adjusted so that the parallel portion is parallel to the extending portion. With such a configuration, the module can be designed with high accuracy, and the process of connecting the display element to the external device can be designed in a compact manner.

  According to the present invention, there is provided a bending method of a pin connector that enables the shaft portion of the pin connector to be accurately bent at a predetermined angle in a bending jig mold for externally bending the shaft portion of the pin connector. be able to.

BEST MODE FOR CARRYING OUT THE INVENTION
A method of externally bending a pin connector using a bending jig mold 10 used in an external bending method of a shaft portion of a pin connector according to an embodiment of the present invention will be described with reference to FIGS. 1, 2, and 3. explain. FIG. 5B shows the shaft portion of the pin connector which is bent outward with the bending jig mold 10.

  Here, in the liquid crystal display element 1, a pair of transparent liquid crystal substrates 11 subjected to alignment treatment are bonded together via a sealing material (not shown), and liquid crystal (not shown) is sealed between the transparent liquid crystal substrates 11. . Here, an end portion of the lower transparent liquid crystal substrate of the pair of transparent liquid crystal substrates 11 extends outward from the upper transparent liquid crystal substrate, and has an electrode terminal portion having a plurality of electrode terminals on the upper surface ( (Not shown) is formed. A pin connector having an approximately U-shaped elastic portion (not shown) is fitted into the electrode terminal portion, and is electrically connected to the electrode terminal, and is pinned by a fixing resin such as an ultraviolet curable resin or an epoxy resin. The connector is fixed.

  The bending jig mold 10 includes an upper mold 3 and a lower mold 2 that serve as punches and dies, and is made of a highly rigid metal such as super steel. The shaft portion 12 of the pin connector is made of copper having good electrical conductivity. Furthermore, the shaft portion 12 has a rectangular cross section, for example, a rod shape having a width of 5 mm and a thickness of 3 mm.

  As shown in FIG. 1, the pin connector shaft portion 12 extending in the vertical direction from one end of the liquid crystal substrate 11 is used as the pin connector shaft bending method according to the embodiment of the present invention. 24 and the lower mold 2 composed of the convex portions 25 are first arranged so as to be kept horizontal. Next, the upper mold 3 is lowered.

  Next, as shown in FIG. 2, when the projection 33 of the upper mold 3 and the suction plate 24 of the lower mold 2 come into contact with each other, the projection 33 of the upper mold 3 and the suction plate 24 of the lower mold 2. Thus, the extending portion 123 in a predetermined range is sandwiched from the connecting portion of the shaft portion 12 of the pin connector, and the state of being set horizontally is maintained.

  Here, since the electrode terminal portion and the pin connector are fixed by a fixing resin such as an ultraviolet curable resin or an epoxy resin as described above, the resin may be peeled off. If the pin connector fixing force is weakened due to peeling, the electrical continuity with the external device cannot be maintained and the original function cannot be performed. The liquid crystal substrate 11 and the shaft portion 12 of the pin connector are set so as to be maintained in the vertical direction with the existing portion 123 interposed therebetween.

  Next, the suction plate 24 of the lower mold 2 is lowered in accordance with the lowering of the upper mold 3. Next, the portions other than the extending portion 123 of the shaft portion 12 of the pin connector are pushed by the convex portion 25 of the lower mold 2 and the adjusting portion 35 of the upper mold 3, while the convex portion 25 of the lower mold 2. The first refracting point 121 and the second refracting point 122 of the shaft portion 12 of the pin connector are simultaneously formed at the portion 26 located at the tip. FIG. 3 shows a state in which the convex portion 33 of the upper mold 3 and the lower mold 2 are thus fitted.

  Here, since the extension part 123 of the shaft part 12 of the pin connector is sandwiched between the convex part 33 of the upper mold 3 and the suction plate 24 of the lower mold 2, it begins to bend at the part 26 and is later bent outward 124. The force that pulls the part becomes. However, a gap larger than the thickness dimension of the shaft portion 12 of the pin connector is provided in the gap between the adjustment portion 35 of the upper die 3 and the convex portion 25 of the lower die 2. By making a gap in this way, the portion that is the tip from the second refraction point 122 at the tip of the outer bending portion 124 and later becomes the parallel portion 126 is in a non-holding state with respect to the mold. It moves in accordance with the pulling force of the portion that becomes the outer bending portion 124 described above. Therefore, if the upper mold 3 and the lower mold 2 are released, the force to return to the outer bent portion 124 does not act, and the extending portion 123 at the second refraction point 122 as shown in FIG. A parallel portion 126 that is not bent inward is formed.

  Further, the interval between the adjustment portion 35 of the upper mold 3 and the convex portion 25 of the lower mold 2 forms a parallel portion 126 that is bent in a direction parallel to the extending portion 123 of the shaft portion 12 of the pin connector. In addition, the adjustment portion 35 of the upper mold 3 is configured so that the distance from the convex portion 25 of the lower mold 2 can be adjusted.

  When it is desired to form the parallel part 126 that is bent inward with respect to the extending part 123, the distance between the adjusting part 35 of the upper mold 3 and the convex part 25 of the lower mold 2 is shortened, and the outer bent part 124 is formed. It can also be processed by applying a pulling force to the part.

  According to the embodiment of the present invention, the parallel portion 126 of the pin connector shaft portion 12 can be bent at an angle parallel to the extending portion 123, and the pin connector shaft portion 12 can be accurately adjusted to a predetermined angle. Can be folded. Therefore, the module can be designed with high accuracy, and the process of connecting the display element to the external device 4 can be designed in a compact manner. In this embodiment, the pin connector is disposed at one end of the display element, but the pin connector may be disposed at both ends of the display element. Moreover, as a display element, an organic EL display element and a plasma display element can be illustrated.

It is a figure explaining the process of the bending jig metal mold | die 10 used for the outer bending process method of the axial part of the pin connector which concerns on this invention. It is a figure explaining the process of the bending jig metal mold | die 10 used for the outer bending process method of the axial part of the pin connector which concerns on this invention. It is a figure explaining the process of the bending jig metal mold | die 10 used for the outer bending process method of the axial part of the pin connector which concerns on this invention. It is a figure which shows the connection of the axial part of a pin connector, and an external electrode. It is a figure explaining the difference of the axial part of the pin connector made by the conventional external bending method, and the axial part of the pin connector made by the external bending method which concerns on this invention. It is a figure explaining the process of the bending jig metal mold | die 100 used for the internal bending method of the axial part of a pin connector. It is a figure explaining the process of the bending jig metal mold | die 101 used for the external bending method of the axial part of the conventional pin connector. It is a figure explaining the process of the bending jig metal mold | die 101 used for the external bending method of the axial part of the conventional pin connector. It is a figure explaining the process of the bending jig metal mold | die 101 used for the external bending method of the axial part of the conventional pin connector.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid crystal display element 2 Lower metal mold 3 Upper metal mold 4 External electrode 11 Liquid crystal substrate 12 Pin connector shaft part 21 Fixing part 22 Recess 23 Part 24 Adsorption plate 25 Protrusion 26 Part 31 Recess 32 Protrusion 33 Protrusion 34 Recess 35 Adjustment part 121 First refraction point 122 Second refraction point 123 Extension part 124 Outer bending part 125 Bending part 126 Parallel part

Claims (3)

An extending portion extending in a direction perpendicular to the substrate of the display element from one end of the display element;
An outer bent portion that is bent outward at the first refraction point at the tip of the extending portion;
A parallel portion bent in a direction parallel to the extending portion at a second refraction point at the tip of the outer bent portion, and an outer bending method of the shaft portion of the pin connector,
The extension part, the outer bending part, and the parallel part are formed on the first bending point with the extension part being held with respect to the shaft part of the linear pin connector before being formed. And bending the shaft portion of the pin connector in a direction parallel to the extending portion in a non-holding state at the second refraction point.   When a mold is used for external bending of the pin connector shaft portion, a non-holding state is formed by making the gap between the mold sandwiching the parallel portion larger than the thickness dimension of the pin connector shaft portion. The outer bending method of the axial part of the pin connector of Claim 1 characterized by the above-mentioned.   3. The outer bending method for a shaft portion of a pin connector according to claim 2, wherein an interval of the gap is adjusted so that the parallel portion is parallel to the extending portion.

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