JP5052151B2 - Protective agent application jig - Google Patents

Description

  The present invention relates to a protective agent application jig for applying a protective agent to a connection portion between an external connection terminal and a lead pin formed in a row on an electrode terminal portion of a wiring board.

  Conventionally, a liquid crystal display panel in which liquid crystal is sealed between a pair of transparent substrates is often used.

  FIG. 5 is a cross-sectional view showing the main part of such a conventional liquid crystal display panel.

  The liquid crystal display panel 1 has a pair of transparent substrates 2 as wiring substrates which are arranged substantially parallel to each other so as to face each other. The transparent substrate 2 located on the observer side (hereinafter referred to as the front surface side) of the pair of transparent substrates 2 is a front substrate 2F, and is located on the counter-observer side (hereinafter referred to as the back side). Reference numeral 2 denotes a rear substrate 2R. A transparent electrode 3 made of indium tin oxide (hereinafter referred to as ITO) or the like is laminated on the surfaces of the transparent substrates 2R and 2F facing each other.

  The surface of the transparent substrate 2 on which the transparent electrode 3 is formed has an alignment film (not shown) whose surface is rubbed to arrange liquid crystal molecules in a certain form between the electrodes facing each other. Are stacked. A sealing material 4 for adhering and integrating the transparent substrates 2R and 2F is disposed in a substantially rectangular frame shape around the opposing surfaces of the pair of transparent substrates 2, and the sealing material In a plane surrounded by 4, liquid crystal (not shown) is sealed together with a spacer (not shown) for adjusting the gap size between the transparent substrates 2 </ b> R and 2 </ b> F. A liquid crystal layer 5 is formed therebetween. A portion sandwiching the liquid crystal layer 5 constitutes a display area of the liquid crystal display panel 1.

  The pair of transparent substrates 2 are made of a transparent resin such as transparent glass or polycarbonate, and are formed in a substantially rectangular flat plate shape. Then, one end side portion of the rear substrate 2R extends so as to protrude from the edge of the front substrate 2F, and the electrode terminal portion 6 is formed in this portion.

  For example, an IC chip 7 that is COG mounted on the liquid crystal display panel 1 is connected to the electrode terminal portion 6 by forming a transparent conductive film made of ITO or the like in a predetermined pattern by a photolithography method or the like. An output signal terminal 8 having a predetermined pattern and an input signal terminal 9 having a predetermined pattern drawn from the electrode 3 and an external connection terminal 10 connected to the input signal terminal 9 are formed.

  In the liquid crystal display panel 1 configured as described above, a connection wiring member 15 is connected to the external connection terminal 10 of the rear substrate 2R as a wiring substrate, and the connection wiring member 15 The liquid crystal display panel 1 is configured to be electrically connected to an external circuit board (not shown).

  By the way, the connection wiring member 15 includes a pair of piece-like members 17 that sandwich the peripheral portion of the rear substrate 2R from both the front side and the rear side of the rear substrate 2R and press-contact the external connection terminal 10. A lead pin 16 having a substantially F-shaped cross section made of a metal body having spring elasticity and having a clip portion 18 and a pin portion 19 inserted into the external circuit board can be exemplified.

  Conventionally, the pair of piece-like members 17 of the lead pins 16 are respectively formed with convex connection portions 20, and the convex connection portions 20 are connected to the external connection terminals 10 of the connection terminal portions 6 of the rear substrate 2R. It is attached to make surface connection (or point connection).

  A protective agent 21 made of, for example, UV (ultraviolet) curable resin or the like is applied to the front and back surfaces of the electrode terminal portion 6 to which the clip portion 18 of the lead pin 16 is fitted. By covering the connection part between the lead terminal 16 and the electrode terminal part 6 with the protective agent, mechanical stress applied when the lead pin 16 is connected to the external circuit board, and the external connection terminal 10 and the clip part 16 It is configured to protect against deterioration of the electrical connection with the convex connection portion 20.

  By the way, as a method of applying the protective agent to the connection portion, conventionally, a method in which one side where the electrode terminal portion is formed is simultaneously immersed in the protective agent stored in a storage tank and applied, or a needle is used. There was a method of manually applying a protective agent that was used and pushed out from the needle along the arrangement of the electrode terminal portion and the lead pin (refer to Patent Document 1 for an application method using a needle).

JP 2003-218503 A

  However, since the application method using the above-described conventional storage tank is a box-shaped container for simply storing the liquid material, it is difficult to adjust the amount of the protective agent applied to the connection portion. In order to make this coating amount uniform, an operator's skill is required, a device for adjusting the supply amount of the protective agent, or a device for adjusting the immersion amount to be uniform is necessary. There were problems such as becoming.

  In addition, the application method using the needle can adjust the application amount, but the needle discharge port (application opening) is adjusted to the target position, or the needle is moved along the electrode terminal part. Therefore, there is a problem in terms of work efficiency.

  Therefore, the present invention has a simple configuration, and can apply a constant amount of protective agent to the connection portion between the wiring board and the lead pin without requiring the skill or skill of the operator. The object is to provide a jig for use.

In order to achieve the above-described object, the protective agent application jig according to the first aspect includes a connection portion between an external connection terminal arranged on an electrode terminal portion of a wiring board and a lead pin made of a metal body having spring elasticity. In the protective agent application jig for applying the protective agent to the storage tank, the jig has a rectangular box-shaped storage tank, and the storage tank has four sides forming the outer periphery of the storage tank. A storage part that stores the protective agent and an island-shaped stage that is located in an area inside the storage part, and is arranged on at least a pair of opposing side parts of the part, and an upper surface of the stage Has a groove filled with the protective agent, and the groove has at least two bottom surfaces with different depths filled with the protective agent arranged in the width direction, and has a deepest depth. Immerse the dimensions so that the connecting part contacts the bottom surface. Characterized in that it is a coatable dimensions the necessary amount of protective agent in the state.

  The protective agent application jig is for immersing the connecting portion in the protective agent filled in the groove portion at a time and applying the protective agent to the connecting portion so as to be lifted. A protective agent stored in a moat-shaped storage portion formed around the stage is used by being crammed into the groove portion on the stage so that the groove portion is filled with the protective agent.

  At that time, the groove part can be easily filled by overflowing an excessive amount of the scavenged protective agent from the groove part, and the protective agent returned from the stage to the original storage part is It can be used by scooping it up and supplying it to the groove.

  Further, since the groove is formed at a depth at which a necessary coating amount of the protective agent can be applied to the connection part by immersing the connection part in a pre-filled protective agent at a time, the skill of the operator Anyone can easily apply a certain amount of protective agent to the connecting portion without requiring skill or skill.

  In addition, the length of the groove is formed with the maximum allowable length without adapting to the dimensions of a specific wiring board so that the protective agent applying jig has versatility. Good.

  Furthermore, the bottom surface of the groove portion has at least a two-stage structure including a bottom surface constituting the deepest portion and a bottom surface formed shallower than the bottom surface, thereby forming the shallow portion in the width direction in the groove portion. Using the formed bottom surface, the connecting portion is brought into contact with the protective agent so as to acclimate, and an introduction portion for preparing a posture for immersing the connecting portion in the protective agent, and the deepest portion in the state of the posture. A dipping part for dipping and applying the connecting part in the protective agent can be formed using the bottom surface constituting the protective layer.

  Then, in the introduction part, the protective part is adapted to the connection part, and the state of immersing in the immersion part is adjusted, and then the connection part is moved to the immersion part so as to slide in the width direction. By applying the protective agent, it is possible to reliably apply the protective agent while preventing the protective agent from adhering to other than the target portion.

The jig for applying the protective agent according to the second aspect applies the protective agent to the connection portion between the external connection terminal arranged on the electrode terminal portion of the wiring board and the lead pin made of a metal body having spring elasticity. In this case, the jig has a rectangular box-shaped storage tank, and the storage tank has at least the opposite of the four sides forming the outer periphery of the storage tank. And a storage portion that stores the protective agent and an island-shaped stage that is positioned in an area inside the storage portion, and the protective agent is formed on an upper surface of the stage. Is formed, and the depth of the deepest part is formed so that a required amount of the protective agent can be applied in a state where the connecting part is immersed in contact with the bottom surface, and the groove is formed, and The bottom surface of the groove is formed as a tapered surface that gently slopes in the width direction. And wherein the door.

  By forming the bottom surface of the groove portion into a tapered surface that is gently inclined in the width direction and sliding the connection portion from a shallowly formed side to a deeply formed side, Functions and effects equivalent to those of the groove portion having the bottom surface can be obtained.

  And the deepest part of the said groove part is formed in the same dimension as the thickness dimension of the metal body which comprises the said lead pin, It is characterized by the above-mentioned.

  Thus, by defining the depth dimension of the deepest portion, a necessary amount of the protective agent can be applied to the connection portion without attaching an extra protective agent to the wiring board.

  A plurality of the grooves are arranged in the width direction on the upper surface of the stage.

  By forming in this way, in one operation of filling the groove with the protective agent, one wiring substrate can be continuously applied a plurality of times using the adjacent groove portion, or a plurality of wiring substrates can be applied. Can be processed.

  According to the protective agent application jig of the present invention, a constant amount of protective agent is always applied to the connection portion between the wiring board and the lead pin with a simple configuration and without requiring the skill and skill of the operator. The outstanding effect that it can be performed can be produced.

  The protective agent applying jig of the present invention will be described with reference to FIGS. The configuration of the liquid crystal display panel to which the protective agent is applied is the same as that of the liquid crystal display panel used in the conventional description, and the description thereof is omitted. In FIG. 1 to FIG. Only the lead pins are shown in a simplified manner.

  The jig 40 for applying a protective agent in the present embodiment includes an external connection terminal 10 arranged on an electrode terminal portion 6 of a rear substrate 2R as a wiring substrate constituting the liquid crystal display panel 1 and a metal body having spring elasticity. It is a protective agent application jig 40 for applying the protective agent 21 to the connection portion with the lead pin 16, and the protective agent is formed on the four sides which are the outer peripheral portions in the storage tank 22 formed in a rectangular thin receiving shape. The storage part 23 which stores the UV curable resin as 21 and the stage 24 formed in a rectangular island shape with the upper part protruding inside the storage part 23 are formed.

  On the upper side of the stage 24, as a coating part for applying the protective agent 21 to the connection part, a necessary amount of the protective agent in a state where the depth of the deepest part is immersed so that the connection part contacts the bottom surface. A long groove portion 25 having a dimension capable of applying 21 is formed, and the groove portion 25 is configured to be filled with the protective agent 21.

  Specifically, in the present embodiment, as shown in FIG. 2, the bottom surface 26 of the groove portion 25 includes a first bottom surface 27 formed in a shallow portion and a second bottom surface 28 formed in the deep portion in a width direction (short). The first bottom surface 27 is used to bring the connecting portion into contact with the protective agent 21 and to adjust the connecting portion, and the connecting portion is immersed in the protective agent 21. An introducing portion 29 for adjusting the posture to be formed, and an immersion portion 30 for applying the soaking portion by immersing the connecting portion in the protective agent 21 are formed using the second bottom surface 28 in the state of the posture.

  Specifically, the depth dimension from the opening 31 of the groove 25 to the second bottom surface 28 in the immersion part 30, that is, the depth dimension of the deep part is a general dimension of the metal body constituting the lead pin 16. The thickness dimension is 0.3 mm, and the depth from the opening 31 to the first bottom surface 27 in the introduction section 29, that is, the depth dimension of the shallow section is 0.1 mm. Further, in the protective agent application jig 40 of the present embodiment, the dimension in the length direction (longitudinal direction) of each groove portion 25 is set to 300 mm so as to correspond to the connection portion in the wiring substrate of the plurality of types of liquid crystal display panels 1. Is formed. Moreover, the width direction dimension of the 1st bottom face 27 which comprises the said introduction part 29, and the width direction dimension of the 2nd bottom face 28 which comprises the said immersion part 30 are all formed in 8 mm. In the present embodiment, six grooves 25 are arranged on the stage 24 with a gap 33 of 6 mm in the width direction. In addition, a peripheral edge 32 having a width of 6 mm is formed around the six grooves 25, and the protective agent 21 can be filled independently for each of the grooves 25.

  The protective agent 21 is scooped up from the moat-shaped storage portion 23 into the groove portion 25 of the stage 24 so that the upper surface of the peripheral edge portion 32 becomes the upper surface of the protective agent 21. It is preferable that the storage portion 24 and the stage 24 arranged in the length direction of the groove portion 25 have a taper shape so that the protective agent 21 can be easily picked up on the stage 24.

  Next, the operation and effect of the protective agent applying jig 40 of this embodiment will be described.

  An operator works while standing in front of the protective agent application jig 40 in which the protective agent 21 is supplied to the storage portion 23. The front in the present embodiment is the immersion part 30 side of the grooves 25 formed in an array.

  Then, the protective agent 21 stored in the moat-shaped storage portion 23 formed around the stage 24 is scooped up on the stage 24 using a spatula or the like, and the upper surface of the peripheral portion 32 is liquidated with the protective agent 21. The grooves 25 are filled with the protective agent 21 so as to be at the same level as the surface. At that time, an excessive amount of the protective agent 21 scooped up overflows from the opening 31 of the groove 25 and is returned to the storage portion 23 surrounding the stage 24 again. In a full state, the water level is adjusted to the height of the opening 31 of the groove 25, that is, the upper surface of the peripheral edge 32 that is the height of the upper surface of the stage 24, and the protective agent 21 is filled.

  Then, as shown in FIG. 3, the operator holds the liquid crystal display panel 1 to which the lead pins 16 are connected by inclining about 45 ° so that the surface side thereof faces the stage 24. The corner portion is brought into contact with the first bottom surface 29 of the introduction portion 29, the stored protective agent 21 is brought into contact with the connection portion of the liquid crystal display panel 1, and the connection portion is immersed in the protective agent 21. Prepare to make it ready.

  Then, with the state maintained, the protective agent 21 stored in the immersion part 30 as it is is slid while the liquid crystal display panel is slid forward so that the surface side of the connection part is along the first bottom surface 27. Then, a certain amount of the protective agent 21 is applied. At this time, it is immersed so that the surface side of the connecting portion is in contact with the second bottom surface 28.

  If this protective agent application jig 40 is used, the groove portion 25 is formed in advance at a depth at which a necessary amount of the protective agent 21 can be applied to the connection portion, so that the skill and skill of the operator are required. Instead, anyone can easily apply a certain amount of the protective agent 21 to the surface side of the connecting portion.

  In addition, in the introduction part 29, the protective agent 21 and the liquid crystal display panel 1 can be acclimated once and can be applied after the state of the liquid crystal display panel 1 is adjusted. The protective agent 21 can be reliably applied while preventing the protective agent 21 from adhering.

  In particular, the liquid crystal display panel 1 is brought into contact with the second bottom surface 28 by forming the depth dimension of the immersion part 30 which is the deepest part to be the same as the thickness dimension of the metal body constituting the lead pin 16. When so immersed, a certain amount of the protective agent 21 can be applied to the connecting portion without attaching an extra protective agent 21 to the liquid crystal display panel 1.

  Then, the coating operation is repeated as many times as necessary for one liquid crystal display panel 1. For example, if three coating operations are required for one liquid crystal display panel 1, the coating operation is continuously performed by sequentially using the three groove portions 25 formed on the stage 24. That is, the protective agent for the two liquid crystal display panels 1 can be applied in one filling operation of the protective agent 21 (the six grooves 25 are filled). If the lead pins 16 have a coarse pitch and a large amount of protective agent 21 is required, the number of repetitions may be increased.

  As shown in FIG. 4, the liquid crystal display panel 1 in which a certain amount of the protective agent 21 is applied to the surface side of the connection portion is disposed on the UV irradiation carrier 35 so that the surface side is on the upper side and is left for a certain period of time. Then, the protective agent 21 is wound around the back side along the clip portion 18 of the lead pin 16 to apply the protective agent 21 to the surface and the back surface of the electrode terminal portion.

  Thus, according to the protective agent application jig 40 of the present embodiment, a constant amount of the protective agent 21 is always applied to the connection portion between the wiring board and the lead pin 16 without requiring the skill or skill of the operator. Can be applied.

  The present invention is not limited to the embodiments described above, and various modifications can be made as necessary.

  For example, the bottom surface of each groove portion 25 is formed into a tapered surface gently inclined in the width direction, and the connecting portion is slid from the shallowly formed introduction portion 29 side to the deeply formed immersion portion 30 side. Thus, even if a certain amount of the protective agent 21 is applied to the connecting portion, the protective agent 21 and the liquid crystal display panel 1 are blended and prepared in the same manner as the groove portion 25 having the bottom surface of the two-stage structure described above. After that, the effect of applying the protective agent 21 in earnest and its effect can be obtained.

  Further, the protective agent 21 is not limited to the above-described UV curable resin. Further, the state of the liquid crystal display panel when dipped in the protective liquid in the groove 25 is not limited to the present embodiment.

The top view of one Embodiment of the jig for protective agent application of the present invention AA sectional view of FIG. Explanatory drawing which shows one process of material application | coating using the jig | tool for protective agent application | coating of this invention Explanatory drawing which shows the post process of the application | coating process of FIG. Sectional drawing which shows the principal part of the conventional liquid crystal display panel

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid crystal display panel 2 Transparent substrate 2F Front substrate 2R Rear substrate 6 Electrode terminal part 10 External connection terminal 15 Connection wiring member 16 Lead pin 17 Strip member 18 Clip part 19 Pin part 21 Protection agent 22 Storage tank 23 Storage part 24 Stage 25 Groove part 26 bottom surface 27 first bottom surface 28 second bottom surface 29 introduction portion 30 immersion portion 31 opening portion 32 peripheral edge portion 33 gap portion 40 protective agent application jig

Claims (4)

In a protective agent application jig for applying a protective agent to a connection portion between an external connection terminal arranged on an electrode terminal portion of a wiring board and a lead pin made of a metal body having spring elasticity, the jig is rectangular. The storage tank has a receiving tank, and is disposed in at least a pair of opposing sides of the four sides forming the outer periphery of the storage tank, and stores the protective agent. A storage portion and an island-like stage located in an area inside the storage portion, a groove portion filled with the protective agent is formed on the upper surface of the stage, the groove portion, At least two bottom surfaces with different depths filled with the protective agent are arranged in the width direction, and a necessary amount is obtained in a state where the depth dimension of the deepest portion is immersed so that the connection portion contacts the bottom surface. Features dimensions that allow the application of protective agents Protective agent applying jig to. In a protective agent application jig for applying a protective agent to a connection portion between an external connection terminal arranged on an electrode terminal portion of a wiring board and a lead pin made of a metal body having spring elasticity, the jig is rectangular. The storage tank has a receiving tank, and is disposed in at least a pair of opposing sides of the four sides forming the outer periphery of the storage tank, and stores the protective agent. And an island-shaped stage located in a region inside the reservoir, the top surface of the stage is filled with the protective agent, and the depth dimension of the deepest portion is the connection portion. The groove portion is formed to have a dimension capable of applying a necessary amount of the protective agent while being immersed in contact with the bottom surface, and the bottom surface of the groove portion is formed on a tapered surface that is gently inclined in the width direction. A protective agent application jig characterized by being made. 3. The protective agent applying jig according to claim 1, wherein a deepest portion of the groove portion is formed in the same dimension as a thickness dimension of the lead pin. 4. The protective agent coating jig according to claim 1, wherein a plurality of the groove portions are arranged in the width direction on the upper surface of the stage. 5.

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