JP5393985B2 - Insulator molding method, mold structure, and connector using insulator manufactured by the molding method - Google Patents

Description

  The present invention relates to a method of molding an insulator (for example, a housing) used for a connector or the like used in an electric device or an electronic device such as a mobile phone, a notebook computer, or a digital camera. The present invention relates to a molding method for producing a 3 mm box-shaped insulator so as not to warp.

Conventionally, when molding an insulator, it is common to arrange the gate at a symmetrical position in consideration of the filling balance. That is, when one pinpoint gate is arranged, it is arranged at the center in the longitudinal direction and the depth direction of the insulator, and when two pinpoint gates are arranged, on the axis of the center in the depth direction of the insulator, And it arrange | positions symmetrically about the center axis line of a longitudinal direction.
The following three documents, Patent Document 1 (Japanese Patent Laid-Open No. 2003-103577), Patent Document 2 (Japanese Patent Laid-Open No. 2003-103567), and Patent Document 3 (Japanese Patent Laid-Open No. 2000-208232) are shown as patent documents.
According to the summary of Japanese Patent Application Laid-Open No. 2003-103577, even when the gate is disposed at a position shifted from the central part of the cavity to one side part, it is possible to prevent the molten resin from being excessively supplied in the one side part direction, For the purpose of suppressing stress concentration and warping of the product, the injection mold 1 is provided with a concave resin reservoir 7 on the opposite surface of the gate 6 to melt the central portion of the gate 6. A molten resin is injected into the cavity 4 from the resin injection hole 5 to form a resin molded product. The resin reservoir 7 is provided at an offset position with respect to the molten resin injection hole 5. The gap between the front end surface of the surrounding gate 6 and the cavity inner surface 3a facing the front end surface of the gate 6 has a difference in size in the circumferential direction, and the flow rate of the molten resin depends on the size of the gap. And adjust direction It has become the jar. Incidentally, in claim 1 of Japanese Patent Application Laid-Open No. 2003-103577, as claimed in claim 1, a concave resin reservoir is provided on the opposite surface of the gate, and the molten resin enters the cavity from the molten resin injection hole at the center of the gate. An injection mold for forming a resin molded product by injecting the resin, wherein the resin reservoir is provided at an offset position with respect to the molten resin injection hole, 2, the molten resin injection hole is formed in a circular shape, the resin reservoir is formed in an arcuate concave surface, and the center of the resin reservoir is centered on the center of the circular molten resin injection hole. The injection mold according to claim 1, wherein the resin reservoir is provided at a front end surface of a resin reservoir forming pin, and is provided at an offset position. 5. The injection mold according to claim 1, wherein the pin is detachably mounted in a pin mounting hole provided in the mold. It is attached to the hole so that the center of rotation coincides with the center of the pin attachment hole, and the resin reservoir is provided at an offset position with respect to the rotation center of the resin reservoir forming pin. An injection mold or the like according to claim 3 is disclosed. According to the summary of Japanese Patent Application Laid-Open No. 2003-103567, even when the gate is arranged at a position eccentric from the central part of the cavity to one side part, it is possible to prevent the molten resin from being excessively supplied toward the one side part, The injection mold 1 and the injection molding method are designed to suppress the concentration of the resin and the warpage of the product. The injection mold 1 and the injection molding method are configured so that the molten resin is injected into the cavity 6 from the molten resin injection hole 5 at the center of the gate 4. Injected to form a resin molded product, the gap between the tip surface of the gate 4 surrounding the molten resin injection hole 5 and the cavity inner surface 3a facing the tip surface of the gate 4 is small in the circumferential direction. The flow rate of the molten resin is adjusted depending on the size of the gap, the amount of the molten resin flowing in the direction where the gap is small is regulated, and more molten resin flows smoothly in the direction where the gap is large. ing. Incidentally, the claims of Japanese Patent Application Laid-Open No. 2003-103567 include, as claim 1, an injection mold for injecting molten resin into a cavity from a molten resin injection hole at the center of a gate to form a resin molded product. The gap between the front end surface of the gate surrounding the molten resin injection hole and the inner surface of the cavity facing the front end surface of the gate has a large and small difference in the circumferential direction. 2. The injection mold according to claim 1, wherein the tip surface of the gate is inclined with respect to the inner surface of the cavity facing the gate. Item 3 is an injection molding method for forming a resin molded product by injecting a molten resin into a cavity from a molten resin injection hole at a central portion of a gate, wherein a front end surface of a gate surrounding the molten resin injection hole; The tip of the gate In the circumferential direction, a large gap portion and a small gap portion are formed in the circumferential direction, and the flow rate and direction of the molten resin are controlled by the size of the gap. A molding method according to claim 4, wherein the gate is disposed at a position close to the first side portion of the cavity and separated from the second side portion, and the first side portion of the cavity of the ring-shaped gap is provided. The gap between the portions facing the second side portion is made small, and the gap between the portions facing the second side portion is made large so that the molten resin flows more easily in the second side direction than the first side portion. An injection molding method or the like according to claim 3 is disclosed. According to the summary of Japanese Patent Laid-Open No. 2000-208232, for the purpose of providing a harness manufacturing method capable of easily positioning the tip of a contact and a mold used in this manufacturing method, the wire pressing portion 40 and the contact pressing portion 24 are raised. -Installed in both lower molds, and after placing the contacts 14 with wires 16 connected to the lower mold 20 in a predetermined position, a plastic material is injected into the mold, and when the plastic material is solidified or hardened, the connector 10 is In the harness manufacturing method for removing from the mold, an upper mold holding piece 32 and a lower mold holding piece 34 protruding from the mold space 42 are provided at the wire holding positions of the upper and lower molds 18 and 20, and the upper mold and the lower mold holding piece. There are elastic bodies 36 between the mold and the mold, and the upper and lower mold holding pieces protruding into the space of the mold are plastic. Structure can be achieved by click material is pushed back to the predetermined product position by the resin pressure of the plastic material when it is injected into the space of the mold is disclosed. Incidentally, the claims of JP-A-2000-208232 include, as claim 1, a connector comprising a contact, a wire connected to the contact, and an insulator for holding and fixing the contact to which the wire is connected, The mold for insert molding the connector is composed of an upper mold and a lower mold, and a wire pressing portion and a contact pressing portion for pressing the wire and the contact at a predetermined position are installed in both the upper and lower molds, After placing the contact to which the wire is connected in a lower mold at a predetermined position, a plastic material is injected into the mold, and the plastic is solidified or cured by cooling or heating for a predetermined time, and the solidified or cured In the harness manufacturing method for removing the connector from the mold, the upper and lower molds are pushed into the mold space at the wire holding positions. The upper mold holding piece and the lower mold holding piece are provided, and the upper mold holding piece and the lower mold holding piece having an elastic body between the mold and the upper mold protruding into the mold space. 3. The harness manufacturing method according to claim 2, wherein the pressing piece and the lower mold holding piece are pushed back to a predetermined product position by the resin pressure of the plastic material when the plastic material is injected into the space of the mold. A lower mold having a contact pressing part and a wire pressing part, and an upper mold having a contact pressing part and a wire pressing part as well as the lower mold, and fitted with the lower mold and having a contact positioning part An upper mold holding piece and a lower mold holding piece that protrude into the space portion are provided at positions where the upper and lower molds are opposed to each other at a position where the wire can be held. Molds and the like have been disclosed for use in the harness manufacturing method according to claim 1, characterized in that a resilient member between the frame and the mold.

Causes of warpage include the weld line (resin fusion part) occurrence position, the lowering of rigidity due to the gate itself, the orientation of the glass fibers contained in the resin, the mold release balance from the mold, the crystallinity of the resin, A shrinkage difference (shrinkage imbalance), non-uniform internal stress, or a combination of these may be considered.
If the pinpoint gate of the insulator is arranged symmetrically with respect to the line that bisects the longitudinal direction as in the past, a weld line (resin fusion part) or gate is always placed on the line that bisects the longitudinal direction. The rigidity will decrease. Since a substantially discontinuous portion is generated on a line that bisects the longitudinal direction, the rigidity is lowered and the molded insulator is warped.
Moreover, if the rigidity on the line which bisects a longitudinal direction falls, the intensity | strength on the line which bisects will fall.
Patent document 1 and patent document 2 are molding of a disk-shaped floppy (registered trademark) disk (FD), and a gate position is used to hide the gate with a label attached to the FD without making the gate the center of the disk. Is eccentric. However, since Patent Document 1 and Patent Document 2 cause warping by decentering the gate position, the warping is suppressed by changing the resin pool or wall thickness. Eccentricity does not suppress warping.
Further, Patent Document 3 relates to a mold used in the harness manufacturing method for which our company has applied, and is not intended to improve the warping after molding, nor is it intended to decenter the gate position.

  The present invention has been made in view of such a conventional problem, and a weld line (resin fusion portion) or the gate itself may appear (arrange) in a line that bisects the longitudinal direction of the insulator. Therefore, the present invention is intended to provide a molding method and a mold structure in which the discontinuous portion is shifted from a line that bisects the longitudinal direction of the insulator to improve strength and reduce warpage by increasing rigidity.

The purpose is that the insulator is substantially symmetrical with respect to a line that bisects the longitudinal direction or the depth direction, and the same molding conditions, the same shape, the same material, and the same size and shape are at least two or more. In a method of molding an insulator manufactured using a pinpoint gate, the pinpoint gate is not provided on a line that bisects the longitudinal direction or the depth direction, and a weld line (resin fusion) it is rather name that part) is generated, the weld lines (resin fused portion) is arranged to be in a position shifted from the bisecting line, characterized in that to prevent warping of the insulator insulation This can be achieved by the body molding method.
The pinpoint gate is a port for injecting molten resin from one injection port into a space for forming an insulator, and the injection port may have any shape. For example, it may be round, square or triangular.

The method for molding an insulator according to claim 2, wherein the pinpoint gate is a line that bisects the longitudinal direction or the depth direction so that the gate does not overlap when the insulator is folded back. 2. The method of molding an insulator according to claim 1, wherein the insulator is warped by disposing the insulator.
The method of molding an insulator according to claim 3, wherein the pinpoint gate is an even number, and the distance from the bisected line is different on both sides of the bisector line. The insulator molding method according to claim 1 or 2, wherein the insulator molding method is provided.
5. The method of molding an insulator according to claim 4, wherein when the pinpoint gate is an even number, the gate is divided into a virtual first region and a virtual second region with a line that bisects the longitudinal direction or the depth direction as a boundary. The number is evenly arranged in the virtual first region and the virtual second region, and the gate position is asymmetrically arranged with respect to a line that bisects the longitudinal direction or the depth direction, and warping of the insulator is performed. The method of molding an insulator according to claim 3, wherein the method is prevented .

The insulator molding method according to claim 5, wherein the pinpoint gate is an odd number.
The method for molding an insulator according to claim 6, wherein when the pinpoint gate is an odd number of 3 or more, the first and second virtual regions are bounded by a line that bisects the longitudinal direction or the depth direction. Divide the gate number into one of the virtual first region and the virtual second region, and place the gate position asymmetrically with respect to a line that bisects the longitudinal direction or depth direction. In addition, the gate itself is not arranged on a line that bisects, and is arranged so that a weld line (resin fusion part) does not occur on the line that bisects, and warping of the insulator 6. The method of forming an insulator according to claim 5, wherein:

The method for molding an insulator according to claim 7, wherein the insulator has a box shape with a thickness of 0.1 to 3 mm. Is the method.
The method for molding an insulator according to claim 8 is the method for molding an insulator according to any one of claims 1 to 7 , wherein the insulator is a connector housing.

A mold structure according to a ninth aspect is a mold structure used in the molding method according to any one of the first to eighth aspects.

A connector according to a tenth aspect is a connector using the insulator molded by the molding method according to any one of the first to eighth aspects.

The connector according to claim 11 has a fitting port into which a flexible printed circuit board (FPC) or a flexible flat cable (FFC) is inserted on one side in the depth direction as the insulator, and contacts on one side or both sides. The connector according to claim 10, wherein the connector has a plurality of insertion holes for insertion and holding.
The connector according to claim 12 is the connector according to claim 11, wherein the insulator has a space in which a rotating member acting on the contact is mounted on the opposite side of the fitting port.
The connector according to claim 13, as the contact, a first piece having a first contact portion at one end and a first pressing portion at the other end, a second piece having a first connection portion at the other end, and the first piece. A first elastic part and a first fulcrum part, which are located between the contact part and the first connection part and connect one end of the first piece and the second piece, the first contact part and the A first contact in which the first elastic part, the first fulcrum part and the first connection part are arranged in a substantially crank shape, or a first piece having a second contact part at one end and a second pressing part at the other end A second piece having a second connection portion at an end, a second elastic portion located between the second contact portion and the second connection portion and connecting the first piece and the other end of the second piece; 2 fulcrum portions, and the second contact portion, the second elastic portion, the second fulcrum portion and the second connection portion are in a substantially U-shape. A connector according to claim 12, characterized in that it comprises a second contact that location.
The connector according to claim 14, wherein the rotating member is provided with a separate and independent locking hole into which the first pressing portion and the second pressing portion of the first contact or the second contact are inserted, and the first contact is provided. Alternatively, the connector according to claim 13, further comprising a pressing portion that acts on the first pressing portion and the second pressing portion of the second contact.

As is apparent from the above description, the following excellent effects can be obtained by the insulator molding method, the mold structure, and the connector using the insulator manufactured by the molding method of the present invention.
(1) At least two or more pins having the same molding conditions, the same shape, the same material, the same size and shape with respect to the line that bisects the longitudinal direction or the depth direction In the method of molding an insulator manufactured using a point gate, the pinpoint gate is not provided on a line that bisects the longitudinal direction or the depth direction, and a weld line (resin fusion part) ) is rather greens occur, the weld lines (resin fused portion) is arranged to be in a position shifted from the bisecting line, the insulator, characterized in that to prevent warping of the insulator Therefore, it is possible to form a discontinuous part that does not appear (arrange) the weld line (resin fusion part) or the gate itself in a line that bisects the longitudinal direction of the insulator. By shifting the longitudinal direction of the insulator from the line that bisects, it leads to strength improvement due to increased rigidity (an improvement of about 30 to 40% than before), and a reduction in warpage (an improvement of about 50 to 70% than before). became. (See FIGS. 4 to 11)
(2) molding method of the insulating body according to claim 2, wherein the pre-Symbol pinpoint gate, a line bisecting the longitudinal direction or the depth direction, if, when folded back the insulation, the gate overlap By arranging it so that it does not warp and preventing warping of the insulator, the weld line (resin fusion part) and the gate itself do not appear (arrange) in a line that bisects the longitudinal direction of the insulator. Molding becomes possible, and by shifting the discontinuous part from the line that bisects the longitudinal direction of the insulator, it leads to an improvement in strength due to increased rigidity (an improvement of about 30 to 40% compared to the conventional), and a reduction in warpage (conventional) More improvement of about 50 to 70%). (See FIGS. 4 to 11)
( 3) In the method for molding an insulator according to claim 3, the pinpoint gate is an even number, and the pinpoint gate is separated from the bisecting line on both sides of the bisecting line. By arranging them at different positions, it becomes possible to form a weld line (resin fusion part) and the gate itself so that they do not appear (arrange) on the line that bisects the longitudinal direction of the insulator. Is shifted from the line that bisects the longitudinal direction of the insulator, leading to an improvement in strength due to increased rigidity (an improvement of about 30 to 40% compared to the prior art) and a reduction in warpage (an improvement of about 50 to 70% compared to the prior art). Became. (See FIGS. 4 to 11)
( 4 ) The insulator molding method according to claim 4 , wherein when the pinpoint gate is an even number, the insulator is divided into a virtual first region and a virtual second region with a line that bisects the longitudinal direction or the depth direction as a boundary. The number of gates is evenly arranged in the virtual first region and the virtual second region, and the gate position is asymmetrically arranged with respect to a line that bisects the longitudinal direction or the depth direction, and the insulator By preventing warping, it becomes possible to form a weld line (resin fusion part) and the gate itself so that they do not appear (arrange) in a line that bisects the longitudinal direction of the insulator. By shifting the longitudinal direction of the insulator from the line that bisects, the strength is improved by improving rigidity ((increase of about 30 to 40% compared to the prior art), and warpage is reduced (increase of about 50 to 70% compared to the prior art). (From Fig. 4 to Fig. See 1)
( 5) The method for forming an insulator according to claim 5 is characterized in that the pinpoint gate is an odd number and is not provided on a line that bisects the longitudinal direction or the depth direction, and a weld line ( By arranging the weld line (resin fusion part) so that it does not occur, and the weld line (resin fusion part) is shifted from the bisected line, the weld line (resin fusion part) and the gate itself are Molding that does not appear (arrange) in a line that bisects the longitudinal direction of the insulator is possible, and by increasing the rigidity by shifting the discontinuous part from the line that bisects the longitudinal direction of the insulator This led to an improvement in strength (an improvement of about 30 to 40% compared to the prior art) and a reduction in warpage (an improvement of about 50 to 70% compared to the prior art). (See FIGS. 4 to 11)
(6) In the method for forming an insulator according to claim 6, when the number of pinpoint gates is an odd number of 3 or more, the virtual first region and the virtual first region with a line that bisects the longitudinal direction or the depth direction as a boundary. Dividing into two regions, one gate number is arranged in one of the virtual first region and the virtual second region, and the gate position is divided into a line that bisects the longitudinal direction or the depth direction. Arranging asymmetrically, without arranging the gate itself on a line that bisects, and so that a weld line (resin fusion part) does not occur on the line that bisects, the insulation 6. The method of molding an insulator according to claim 5 , wherein warping of the body is prevented, so that the weld line (resin fusion portion) and the gate itself are divided into lines that bisect the longitudinal direction of the insulator. To appear (place) By forming the discontinuous portion away from the line that bisects the longitudinal direction of the insulator, the strength is improved by increasing the rigidity (an improvement of about 30 to 40% compared to the prior art) and the warpage is reduced ( This is an improvement of about 50 to 70% compared to the prior art). (See FIGS. 4 to 11)
(7) molding method of the insulating body according to claim 7, wherein, the insulator according to any one of the preceding claims, characterized in 6 that the box-shaped thick 0.1~3mm Since the insulator molding method is adopted, it is possible to mold without appearing (arranging) the weld line (resin fusion part) or the gate itself in a line that bisects the longitudinal direction of the insulator. By shifting the part from the line that bisects the longitudinal direction of the insulator, it leads to strength improvement by improving rigidity (an improvement of about 30 to 40% compared to the prior art) and a reduction in warpage (an improvement of about 50 to 70% compared to the prior art). )Became. (See FIGS. 4 to 11)
(8) In the method of molding an insulator according to claim 8, since the insulator is a connector housing, the weld line (resin fusion portion) and the gate itself are divided into lines that bisect the longitudinal direction of the insulator. Molding that does not appear (arrange) is possible, and the discontinuity is shifted from the line that bisects the longitudinal direction of the insulator to improve strength by improving rigidity (an improvement of about 30 to 40% compared to the conventional). Thus, it has become possible to provide a connector housing that can reduce warpage (an improvement of about 50 to 70% over the prior art). (See FIGS. 4 to 11)

(9) Since the mold structure according to claim 9 is the mold structure used for the molding method according to any one of claims 1 to 8 , the weld line (resin fusion part) and the gate itself are insulated. Molding that does not appear (arrange) in the line that bisects the longitudinal direction of the body is possible, and the strength is improved by increasing the rigidity by shifting the discontinuous part from the line that bisects the longitudinal direction of the insulator. (Provided about 30 to 40% improvement over the prior art), resulting in a reduction in warpage (an improvement of about 50 to 70% over the prior art). (See FIGS. 4 to 11)

(10) Since the connector according to claim 10 is a connector characterized by using the insulator molded by the molding method according to any one of claims 1 to 8 , a weld line (resin fusion portion) ) And the gate itself does not appear (arrange) in the line that bisects the longitudinal direction of the insulator, and the discontinuous portion is shifted from the line that bisects the longitudinal direction of the insulator. This leads to an improvement in strength due to increased rigidity, reducing warpage, and further, reducing the warpage during assembly because the gate is arranged at a position that cancels out stress on the insulator caused by the incorporation of the contact. (See Figures 6 and 7)
(11) The connector 10 according to claim 11 has, as the insulator, a fitting port 18 into which a flexible printed circuit board (FPC) or a flexible flat cable (FFC) is inserted on one side in the depth direction. 11. The connector 10 according to claim 10, further comprising a plurality of insertion holes 38 into which the contacts 14 and 15 are inserted and held on the other side, so that the weld line (resin fusion part) and the gate itself are insulated. Molding that does not appear (arrange) in the line that bisects the longitudinal direction of the body is possible, and the strength is improved by increasing the rigidity by shifting the discontinuous part from the line that bisects the longitudinal direction of the insulator. As a result, the gate is placed at a position where the warpage is reduced and the stress applied to the insulator caused by the incorporation of the contact is offset. Also to warp reduction at the time of write. (See Figures 6 and 7)
( 12 ) The connector 10 according to claim 12 , characterized in that the insulator 12 has a space in which a rotating member 16 acting on the contacts 14, 15 is mounted on the opposite side of the fitting port 18. Since the connector 10 according to Item 11 is used, it is possible to mold the weld line (resin fusion part) and the gate itself so that they do not appear (arrange) in a line that bisects the longitudinal direction of the insulator. By shifting the continuous part from the line that bisects the longitudinal direction of the insulator, the rigidity is improved by increasing the rigidity, the warpage is reduced, and furthermore, the stress to the insulator caused by the incorporation of the contact is offset. Since the gate is arranged at the position, the warpage at the time of incorporation is also reduced. (See Figures 6 and 7)
( 13 ) In the connector 10 according to claim 13 , as the contacts 14, 15, the first piece 19 having the first contact portion 22 at one end and the first pressing portion 20 at the other end and the first connection at the other end. The first elastic portion 34 that is located between the second piece 21 having the portion 24, the first contact portion 22, and the first connecting portion 24 and that connects one end of the first piece 19 and the second piece 21. And the first contact 14 having the first contact portion 22, the first elastic portion 34, the first fulcrum portion 32, and the first connection portion 24 arranged in a substantially crank shape. A first piece 191 having a second contact portion 221 at one end and a second pressing portion 201 at the other end, a second piece 211 having a second connection portion 241 at one end, the second contact portion 221, and the second piece. The first piece 191 and the first piece 191 are located between the connecting portions 241. It has the 2nd elastic part 341 and the 2nd fulcrum part 321 which connect the other end of the two pieces 211, and the 2nd contact part 221, the 2nd elastic part 341, the 2nd fulcrum part 321, and the 2nd connection. 13. The connector 10 according to claim 12, further comprising a second contact 15 for disposing the portion 241 in an approximately U-shape, so that the weld line (resin fusion portion) and the gate itself are arranged in the longitudinal direction of the insulator. Molding that does not appear (arrange) in a line that bisects the direction becomes possible, and by shifting the discontinuous part from the line that bisects the longitudinal direction of the insulator, it leads to strength improvement by increasing rigidity, Further, the warpage is reduced, and further, since the gate is disposed at a position where the stress applied to the insulator generated by the incorporation of the contact is offset, the warpage during the incorporation is also reduced. (See Figures 6 and 7)
( 14 ) The connector 10 according to claim 14 , wherein the rotating member 16 includes the first contact portion 20 and the second press portion 201 of the first contact 14 or the second contact 15 separately and independently. The connector according to claim 13, wherein a stop hole 30 is provided, and a pressing portion 36 that acts on the first pressing portion 20 and the second pressing portion 201 of the first contact 14 or the second contact 15 is provided. 10 makes it possible to mold the weld line (resin fusion part) and the gate itself so that they do not appear (arrange) in a line that bisects the longitudinal direction of the insulator. By shifting the longitudinal direction of the body from the line that bisects, the rigidity is improved, the strength is improved, the warpage is reduced, and the stress to the insulator generated by the incorporation of the contact is offset. Also it becomes warp reduction when built because of the gate disposed. (See Figures 6 and 7)

The feature of the present invention is that the insulator is substantially symmetrical with respect to the line that bisects the longitudinal direction or the depth direction, and has at least two of the same molding conditions, the same shape, the same material, and the same size and shape. In the method of molding an insulator manufactured using the above pinpoint gate, the pinpoint gate is not provided on a line that bisects the longitudinal direction or the depth direction, and a weld line ( and characterized in that the resin fusing section) is generated, rather name the weld line (resin fused portion) is arranged to be in a position shifted from the bisecting line, to prevent warping of the insulator This is a method of molding an insulator.
That is, the pinpoint gate is not provided on a line that bisects the longitudinal direction or the depth direction, and the gate position is asymmetrically arranged with respect to the line that bisects the longitudinal direction or the depth direction. When the pinpoint gate is an even number, it is divided into a virtual first region and a virtual second region with a line that bisects the longitudinal direction or depth direction as a boundary, and the number of gates is divided into the virtual first region and the virtual first region. If the gate position is asymmetrically arranged with respect to a line that bisects the longitudinal direction or depth direction, and the pinpoint gate is an odd number of three or more, the longitudinal direction or depth Divided into a virtual first area and a virtual second area with a line that bisects the direction as a boundary, and the number of gates is increased by one in either the virtual first area or the virtual second area And it is obtained by preventing the warpage of the insulator by relative to the gate position the longitudinal direction or the depth direction bisecting lines are arranged asymmetrically.
That is, when there are a plurality of gates, they may be arranged only on one side of the virtual first area 60 or the virtual second area 62, and both the virtual first area 60 or the virtual second area 62 When arranged, the distances from the bisector 64 to the first gates of the virtual first region 60 and the virtual second region 62 are different.
For example, in the case of a three-point gate, all the distances from the bisector 64 may be different, or the distance from the bisector 64 to the first gate position is different, and the same distance as the rest. It may be. (The distance from the bisector 64 to the first gate in the virtual first region is 5 mm, and the distance from the bisector 64 to the second gate in the virtual first region is 3 mm. (The distance to the third gate in the virtual second area is 5 mm)
The same molding condition means that the injection pressure, injection speed, mold temperature, resin temperature, and holding pressure are almost the same. The meaning of almost the same is in the range of 70 MPa to 200 MPa in terms of injection pressure, in the range of 25 to 300 mm / sec in terms of injection speed, and in the range of room temperature to 170 ° C. in terms of mold temperature. In terms of temperature, it is in the range of 280 to 380 ° C., and in terms of holding pressure, it is in the range of 10 MPa to 50 MPa.
The same shape means the same product shape. That is, when the same product shape is molded, the tendency of warpage becomes the same under the same molding conditions and the same material.
The same material is a material containing the same amount of glass fiber. For example, liquid crystal polymer (LCP) containing 30% glass fiber, liquid crystal polymer (LCP) containing 20%, polybutylene terephthalate (PBT) containing 30% glass fiber, or polybutylene containing 20% It means terephthalate (PBT).
The same shape and size of the pinpoint gate means that the tip of the injection port has a round shape and the diameter is the same as 0.2 mm. That is, when the same product shape is molded, the tendency of warping becomes the same when the same shape is obtained under the same molding conditions and with the same material.

The line that bisects the longitudinal direction or the depth direction is arranged so that the pinpoint gates do not overlap when the insulator is folded back.
(1) In the method for molding an insulator according to claim 2, when the pinpoint gate is a line that bisects the longitudinal direction or the depth direction, the gate overlaps when the insulator is folded back. It is arranged so that there is no.
(2) As described in claim 3, the pinpoint gate is an even number, and the pinpoint gate is located on both sides of the bisecting line at different distances from the bisecting line. It is arranged .
(3) as claimed in claim 4, wherein when the pin point gates is even divided line that bisects the longitudinal direction or the depth direction in the virtual second region and the virtual first region bounded, the number of gates Are equally arranged in the virtual first region and the virtual second region, and the gate position is asymmetrically arranged with respect to a line that bisects the longitudinal direction or the depth direction.
( 4 ) As described in claim 5, the pinpoint gate is an odd number, and is not provided on a line that bisects the longitudinal direction or the depth direction, and a weld line (resin fusion part) on the line that bisects The weld line (resin fusion part) is arranged so as to be shifted from the bisected line.
( 5 ) As described in claim 6, when the pinpoint gate is an odd number of 3 or more, the pinpoint gate is divided into a virtual first area and a virtual second area with a line that bisects the longitudinal direction or the depth direction as a boundary. The number of gates is increased by one in either the virtual first region or the virtual second region, and the gate position is asymmetrically arranged with respect to a line that bisects the longitudinal direction or the depth direction. In addition, the gate itself is not arranged on a line that bisects, and is arranged so that a weld line (resin fusion part) does not occur on the line that bisects.
The longitudinal direction is the arrow “C” direction shown in FIG. 13, and the depth direction is the arrow “D” direction. Further, the bisector in the longitudinal direction is a line denoted by reference numeral 64 shown in FIG.

In the following, warpage and strength data when an insulator having a shape as shown in FIG. 1 is molded using the same size and shape of a pinpoint gate with the same molding conditions, the same shape and the same material are shown.
The strength test was performed by supporting both ends as shown in FIG. 2 and applying a load to the central portion. The warping is in the positive direction in FIG. 3A and in the negative direction in FIG. If the warp is in the negative direction, it will be a line contact with the central recess as a fulcrum, and it will be unstable because it tends to rotate left and right. A malfunction occurs.

As molding conditions, the injection pressure is 100 to 140 MPa, the injection speed is 100 to 150 mm / sec, the resin temperature is 280 to 350 ° C., the mold temperature is 80 ° C., the holding pressure is 10 MPa to 50 MPa, and the glass 35 % Of Toray-made Siberus L304G35H, the shape of the pinpoint gate was a round shape, and was molded with a diameter of 0.2 mm.
In the case of the shape of FIG. 1A, the warpage and strength of the present application and the conventional one are as shown in Table 1 (warpage) and Table 2 (strength). Table 1 is described in FIG. 4, and Table 2 is described in FIG.
The three-point gate is this application, and the four-point gate is conventional, and the gate is symmetrically arranged with respect to the bisector 64. In the case of a three-point gate, the resin was injected from the white circle.
With regard to warping, it becomes possible to form a weld line (resin fusion part) or the gate itself so that it does not appear (arrange) in a line that bisects the longitudinal direction of the insulator. By shifting the longitudinal direction from the line that bisects, the length was improved by about 70% (reduction of warpage).
As an additional effect, the strength (rigidity) can be molded so that the weld line (resin fusion part) and the gate itself do not appear (arrange) in a line that bisects the longitudinal direction of the insulator. By shifting the continuous portion from the line that bisects the longitudinal direction of the insulator, it was improved by about 37% (increase in rigidity) compared to the conventional case.

In the case of the shape of FIG. 1B, the warpage and strength of the present application and the conventional one are as shown in Table 3 (warpage) and Table 4 (strength). Table 3 is described in FIG. 6, and Table 4 is described in FIG. A two-point gate, a five-point gate, and a six-point gate are conventional, and a resin is injected from a white circle portion. The three-point gate is the present application, and the resin was injected from the white circle portion. In the case of a 5-point gate, the central gate is arranged on the bisector 64. The absolute value is the same between the two-point gate and the three-point gate, but there is a difference in whether the warp is in the plus direction or the minus direction. If the warp is in the negative direction, it will be a line contact with the central recess as a fulcrum, and it will be unstable because it tends to rotate left and right. A malfunction occurs. Therefore, it is better to warp the three-point gate in the positive direction.
With regard to warping, it becomes possible to form a weld line (resin fusion part) or the gate itself so that it does not appear (arrange) in a line that bisects the longitudinal direction of the insulator. By shifting the longitudinal direction from the line that bisects, the improvement was about 67% (reduction of warpage) compared to the conventional case.
As an additional effect, the strength (rigidity) can be molded so that the weld line (resin fusion part) and the gate itself do not appear (arrange) in a line that bisects the longitudinal direction of the insulator. By shifting the continuous portion from the line that bisects the longitudinal direction of the insulator, it was improved by about 27% (increase in rigidity) compared to the conventional case.

In the case of the shape of FIG. 1C, the warpage and strength of the present application and the conventional one are as shown in Table 5 (warpage) and Table 6 (strength). Table 5 is described in FIG. 8, and Table 6 is described in FIG.
The three-point gate is this application, and the four-point gate is conventional, and the gate is symmetrically arranged with respect to the bisector 64. In the case of a three-point gate, the resin was injected from the white circle.
With regard to warping, it becomes possible to form a weld line (resin fusion part) or the gate itself so that it does not appear (arrange) in a line that bisects the longitudinal direction of the insulator. By shifting the longitudinal direction from the line that bisects, the improvement was about 52% (reduction of warpage) compared to the conventional case.
As an additional effect, the strength (rigidity) can be molded so that the weld line (resin fusion part) and the gate itself do not appear (arrange) in a line that bisects the longitudinal direction of the insulator. By shifting the continuous portion from the line that bisects the longitudinal direction of the insulator, it was improved by about 30% (increase in rigidity) compared to the conventional case.

In the case of the shape of FIG. 1D, the warpage and strength of the present application and the conventional one are as shown in Table 7 (warpage) and Table 8 (strength). Table 7 is described in FIG. 10, and Table 8 is described in FIG.
The three-point gate is this application, and the four-point gate is conventional, and the gate is symmetrically arranged with respect to the bisector 64. In the case of a three-point gate, the resin was injected from the white circle.
With regard to warping, it becomes possible to form a weld line (resin fusion part) or the gate itself so that it does not appear (arrange) in a line that bisects the longitudinal direction of the insulator. By shifting the longitudinal direction from the line that bisects, the height was improved by about 68% (reduction of warpage).
As an additional effect, the strength (rigidity) can be molded so that the weld line (resin fusion part) and the gate itself do not appear (arrange) in a line that bisects the longitudinal direction of the insulator. By shifting the continuous portion from the line that bisects the longitudinal direction of the insulator, it was improved by about 30% (increase in rigidity) compared to the conventional case.

  As shown in Table 1 to Table 8, when the same shape insulator is molded with the same molding conditions, the same shape and the same material, and using the same size and shape pinpoint gate, compared to the conventional case It was clearly found that warpage and strength showed the same tendency (effect).

An example of the connector used with the above molding method will be described with reference to the shape of FIG.
An embodiment of the connector of the present invention will be described with reference to FIGS.
12 is a perspective view of the connector of the present invention as viewed from above the fitting port side, and FIG. 13 is a perspective view of the housing (insulator) as viewed from above the fitting port. FIG. 14 is a perspective view of the first contact, and FIG. 15 is a perspective view of the rotating member. FIG. 16 is a perspective view of a second contact different from FIG. FIGS. 17A to 17E are explanatory views for explaining the movement of the pressing portion and the rotating shaft when the rotating member rotates.
A connector 10 using an insulator molded by the molding method of the present invention includes a housing 12, which is an insulator, a rotating member 16, and a first contact 14.

  First, the FPC will be described. The FPC includes at least a pattern in contact with the first contact portion 22 of the first contact 14 and a conductor portion connected to the circuit from the pattern. In this embodiment, the FPC pattern is arranged on the surface.

Next, the housing 12 will be described. The housing 12 is an electrically insulating plastic and is manufactured by a known technique of injection molding. The material is appropriately selected in consideration of dimensional stability, workability, cost, etc. Generally, polybutylene terephthalate is used. (PBT), polyamide (66PA, 46PA), liquid crystal polymer (LCP), polycarbonate (PC), poniphenylene sulfide (PPS), and synthetic materials thereof.
The housing 12 is provided with an insertion hole 38 into which a required number of first contacts 14 are mounted, and is fixed by press-fitting, hooking (lance), welding or the like.

  On both sides in the longitudinal direction, bearing portions to which the shaft 28 of the rotating member 16 is rotatably mounted are provided. The shape and size of the bearing portion may be any as long as the shaft 28 of the rotating member 16 is mounted so as to be able to rotate, and is appropriately designed in consideration of this role and the strength and size of the housing 12. To do.

  The housing 12 includes a ceiling portion 23 that covers the first contact portion 22 of the first piece 19 of the first contact 14.

The gate 11 will be described.
In this housing 12, the pinpoint gate 11 is divided into a virtual first area 60 and a virtual second area 62 when the housing 12 is folded back with a bisector in the longitudinal direction. And one point is arranged in the virtual second region 62. When the pinpoint gates 11 are the first gate 111, the second gate 112, and the third gate 113, the second gate 112 and the third gate 113 are asymmetric (the distance from the bisector 64 is different). The first gate 111 is disposed further outward than the second gate 112. That is, the first gate 111 is displaced by 8.1 mm from the bisector 64, the second gate 112 is displaced by 1.5 mm from the bisector 64, and the third gate 113 is displaced by 4.8 mm from the bisector 64. Yes.
Considering the reduction of the warp, it is desirable that the distance between the pinpoint gates 11 be narrowed according to the length in the longitudinal direction or the depth direction of the insulator. Ideally, it should be about 1.0 to 5.0 mm.

Here, based on FIG. 17, the method of the movement and rotation of the pressing part 36 of the said rotation member 16 is demonstrated. Here, it is a partial drawing which took the case where it rotates with the 1st contact 14 as an example.
FIG. 17A shows a state before the connection object is connected to the connector 10, and the lower end 54 side of the pressing portion 36 is connected to the first protruding portion 26 and the first connecting portion 24 of the first pressing portion 20. Located between.
As shown in FIG. 17B, when the operation portion 37 is rotated (clockwise in the drawing), the pressing portion 36 moves in a direction opposite to the fitting port 18, and the lower end 54 of the pressing portion 36 is moved to the first position. The first pressing portion 20 is sandwiched between the first protruding portion 26 and the first connecting portion 24.
As shown in FIG. 17C, when the operation portion 37 is further rotated, the pressing portion 36 rotates about the center of the pressing portion 36 as the rotation shaft 50 at the position (B).
As shown in FIG. 17D, when the operation portion 37 is further rotated, the pressing portion 36 is rotated around the center of the pressing portion 36 at the position (C), and the pressing portion 36 is The rotary shaft 50 moves to the upper end 52 side that is in contact with the first protrusion 26 and is substantially vertical between the first pressing portion 20 and the first connection portion 24.
As shown in FIG. 17E, when the operation portion 37 is further rotated, the pressing portion 36 is rotated around the upper end 52 side in contact with the first projecting portion 26 at the position (D). The pressing part 36 is engaged in a state of being hooked on the first protruding part 26.
That is, the pressing portion 36 moves first, then rotates, and further rotates, the rotating shaft 50 changes to perform a compact rotation (rotation) between space savings.
That is, in the connector 10 of the present invention, when the connection object such as the FPC is inserted into the fitting port 18, no insertion force is applied (so-called zero insertion force (ZIF)) structure, and the rotation is performed. By rotating the pressing portion 36 of the member 16 closer to the first protruding portion 26 side of the first contact 14 (pushing up the first pressing portion 20 of the first contact 14 more on the first protruding portion 26 side). The structure is such that the rotating member 16 can be locked with a small force, and the first pressing portion 20 on the first protruding portion 26 side of the first contact 14 is pushed up by the pressing portion 36 of the rotating member 16. It has a structure that can obtain a high contact force.

  Next, the rotating member 16 will be described. The rotating member 16 is an electrically insulating plastic and is manufactured by a known technique of injection molding. The material is appropriately selected in consideration of dimensional stability, workability, cost, etc. Examples include butylene terephthalate (PBT), polyamide (66PA, 46PA), liquid crystal polymer (LCP), polycarbonate (PC), poniphenylene sulfide (PPS), and synthetic materials thereof. The rotating member 16 mainly includes an operating portion 37 and a shaft 28 portion rotatably mounted on the housing 12, a pressing portion 36 that presses the first pressing portion 20 of the first contact 14, and the first contact 14. The first protrusion 26 is engaged with a locking hole 30. The shaft 28 is a fulcrum for rotating the rotating member 16, and the rotating member 16 is appropriately mounted on both sides in the longitudinal direction of the housing 12 so as to be rotatable. In addition, on both sides in the longitudinal direction, when the first pressing portion 20 of the first contact 14 is pressed, the rotating member 16 is engaged with the housing 12 so as not to be lifted in the height (upward in the drawing) direction. A matching lock is provided. The lock portion may have any shape, size, etc. as long as it can engage with the housing 12 and is appropriately designed in consideration of the above-described role, the size, strength, etc. of the connector 10.

  The pressing portion 36 is a portion that is pressed against the first pressing portion 20 of the first contact 14, and the shape thereof is preferably an elongated shape, and in the present embodiment, an elliptical shape. Thus, by making the ellipse shape, the rotation member 16 is rotated in the direction of the arrow “A” as shown in FIG. 12, and the first pressing portion 20 and the first connection portion 24 of the first contact 14 are The first pressing portion 20 of the first contact 14 is lifted by the change in the size of the pressing portion 36, and the first contact portion 22 side of the first contact 14 is pressed against the FPC. Yes. As the shape of the pressing portion 36, the first contact 14 can be rotated between the first pressing portion 20 and the first connecting portion 24 of the first contact 14, and the first contact 14 varies depending on the size of the major axis and the minor axis. Any one can be used as long as the first pressing portion 20 is pushed up.

  Further, when the pivoting member 16 is pivoted, the repulsive force against the pivoting of the pivoting member is strong, and the central portion of the pivoting member 16 swells in the direction of the arrow “B” in FIG. In order to prevent this, a locking hole 30 with which the first protrusion 26 of the first contact 14 engages is provided separately. By providing the locking hole 30 separately and independently, the strength of the rotating member 16 is prevented and deformation during rotation is prevented.

  As the gate of the rotating member 16, a pinpoint gate or a side gate displaced from the bisector as described above, a plurality of sub marigates are formed, and a predetermined amount is obtained by injecting molten resin into the mold. The shape of the rotating member.

The first contact 14 will be described. The first contact 14 is made of metal and is manufactured by a known press working. The material of the first contact 14 is required to be springy or conductive, and examples thereof include brass, beryllium copper, and phosphor bronze.
The first contact 14 includes a first piece 19 having a first contact portion 22 at least at one end and a first pressing portion 20 at the other end, and a second piece 21 having a first connection portion 24 at the other end. The first piece 19 and the second piece 21 are provided with a first elastic connecting portion 31 (consisting of a first fulcrum portion 32 and a first elastic portion 34) for connecting one end of the second piece 21. That is, the first contact 14 has a substantially inverted H-shape as shown in FIG. 14, and is pressed by the first contact portion 22 that contacts the FPC on one end side and the rotating member 16 on the other end side. A first piece 19 having a first projecting portion 20 and a first projecting portion 26 projecting inwardly at the tip of the first retaining portion 20, and the first fulcrum portion 32 on one end side and the other end side. The first elastic part 34 (which connects the first piece 21 having the first connection part 24 connected to the substrate, the vicinity of the center of the first piece 19 and the first fulcrum part 32 of the second piece 21 ( The first fulcrum part 32 and the first elastic part 34 are combined together to form a first elastic connection part 31) and the first piece 14 in the vicinity of the second piece 21 in the vicinity of the first elastic connection part 31 of the first contact 14. Part 42. The first contact portion 22, the first elastic portion 34, the first fulcrum portion 32, and the first connection portion 24 of the first piece 19 are arranged in a substantially crank shape. In the present embodiment, the first elastic connecting portion 31 can be divided into a first fulcrum portion 32 and a first elastic portion 34, and extends from one end (the first fulcrum portion 32) of the second piece 21. A first extending portion 44 that faces the first contact portion 22 is provided, and another contact portion is provided at the tip of the first extending portion 44.

  The front first fixing portion 42 is provided in the vicinity of the second piece 21 in the vicinity of the first elastic coupling portion 31 of the first contact 14. That is, the first contact portion 22 and the first elastic coupling portion 31 (including the first fulcrum portion 32 and the first elastic portion 34) of the first contact 14 are provided on the lower side near the first fulcrum portion 32. (Part) is prevented from lifting up (warping). The first fixing portion 42 has a substantially inverted U-shaped cross section and is fixed so as to sandwich the housing 12. The position and size of the first fixing portion 42 are appropriately designed in consideration of such role and holding force.

  The first contact portion 22 has a convex shape so as to easily come into contact with the FPC, and the first connection portion 24 is a surface mount type (SMT) as shown in FIG. Dip type may be used.

  The first fulcrum part 32, the first elastic part 34, and the first pressing part 20 are parts for performing the following actions when the FPC is inserted. After the FPC is inserted into the fitting port 18 of the housing 12, the pressing portion 36 of the rotating member 16 rotates between the first connection portion 24 of the first contact 14 and the first pressing portion 20. When it moves, the first pressing portion 20 is pushed up by the pressing portion 36, so that the first fulcrum portion 32 of the first contact 14 serves as a fulcrum, and the first elastic portion 34 of the first contact 14 has the first elastic portion 34. By tilting the piece 19 toward the first contact portion 22, the first contact portion 22 is pressed by the FPC. The sizes and shapes of the first fulcrum part 32, the first first elastic part 34, and the first pressing part 20 are appropriately designed in order to achieve such an action.

  A first protrusion 26 is provided at the tip of the first pressing portion 20 of the first contact 14, and the pressing portion 36 of the rotating member 16 is connected to the first pressing portion 20 of the first contact 14 and the first pressing portion 20. When rotating between the connecting portions 24, the repulsive force against the rotation of the rotating member 16 is strong, so that the central portion of the rotating member 16 swells in the direction of the arrow “B” in FIG. To prevent. The size of the first protruding portion 26 may be any size as long as it can fulfill such a role, and is appropriately designed to the extent that the pressing portion 36 of the rotating member 16 is caught. Further, the role of the first projecting portion 26 is that when the rotation of the rotating member 16 is finished and the connection object is in contact with the first contact 14, the pressing portion of the rotating member 16. It also serves to hold 36 so that it does not fall.

  In this embodiment, a first extending portion 44 extending from the first fulcrum portion 32 in the direction opposite to the first connecting portion 24 (direction of the fitting port 18) is provided, and the first piece is provided at the tip thereof. Another contact portion is provided so as to face 19 first contact portions 22.

Here, the second contact 15 which is another contact will be described. The second contact 15 is also made of metal and is manufactured by a known press working. Since the material of the second contact 15 is also required to be springy or conductive, examples thereof include brass, beryllium copper, and phosphor bronze.
Hereinafter, only differences from the first contact 14 will be described.
The second contact 15 includes a first piece 191 having a second contact portion 221 at least at one end and a second pressing portion 201 at the other end, and a second piece 211 having a second connection portion 241 at one end. And a second elastic connecting portion 311 (consisting of a second fulcrum portion 321 and a second elastic portion 341) for connecting the other end of the first piece 191 and the second piece 211. That is, the second contact 15 has a substantially inverted H shape as shown in FIG. 16, and is pressed by the second contact portion 221 that contacts the FPC on one end side and the rotating member 16 on the other end side. A first piece 191 having a second pressing portion 201 and a second protruding portion 261 protruding inwardly at the tip of the second pressing portion 201, a second connecting portion 241 connected to the substrate on one end side, and the like A second piece 211 having a second fulcrum part 321 on the end side, and a second elastic part 341 that connects the vicinity of the center of the first piece 191 and the second fulcrum part 321 of the second piece 211 (see above). The second fulcrum part 321 and the second elastic part 341 are combined together to form a second elastic connecting part 311) and the second fixing part in the vicinity of the second piece 211 in the vicinity of the second elastic connecting part 311 of the second contact 15. 421. The second contact portion 221, the second elastic portion 341, the second fulcrum portion 321, and the second connection portion 241 of the first piece 191 are arranged in a substantially U shape. In the present embodiment, the second elastic connecting part 311 can be divided into a second fulcrum part 321 and a second elastic part 341, and extends from the other end of the second piece 211 (the second fulcrum part 321). A second extending portion 441 is provided so as to face the provided second pressing portion 201. In the present embodiment, another contact portion is provided between the second connection portion 241 and the second fulcrum portion 321 at a position facing the second contact portion 221 of the first piece 191. Yes.

  As the connector, the first contact 14 and the second contact 15 may be arranged in a staggered manner, may include only the first contact 14, or may include only the second contact 15. .

Hereinafter, the mold structure will be described.
The mold structure is a mold that includes at least an upper mold and a lower mold and uses at least one pinpoint gate 11 having the same molding conditions, the same shape and the same material, the same size and shape, and the upper mold. In a mold structure having a space for forming the insulator substantially symmetrical with respect to a line that bisects at least the longitudinal direction or the depth direction in a state where the upper mold and the lower mold are closed, either the upper mold or the lower mold The position of the pinpoint gate provided on one side is a line that bisects the longitudinal direction or the depth direction, and is arranged so that the gates 11 do not overlap when the insulator is folded back. In the mold structure.
The line that bisects the longitudinal direction or the depth direction is arranged so that the pinpoint gates 11 do not overlap when the insulator is folded back.
(1) In the method for molding an insulator according to claim 2, when the pinpoint gate is a line that bisects the longitudinal direction or the depth direction, the gate overlaps when the insulator is folded back. It is arranged so that there is no.
(2) When the number of the pinpoint gate is one, the gate position is deviated from a line that bisects the longitudinal direction or the depth direction.
(4) As described in claim 4, when there are a plurality of pinpoint gates, the gate position is asymmetric with respect to a line that bisects the longitudinal direction or the depth direction, and the gate itself is bisected. It is arranged so that a weld line (resin fusion part) does not occur on a line that bisects without being arranged on the line.
(5) As described in claim 5, when the pinpoint gate is an even number, the number of gates is divided into a virtual first region and a virtual second region with a line that bisects the longitudinal direction or the depth direction as a boundary. Are equally arranged in the virtual first region and the virtual second region, and the gate position is asymmetrically arranged with respect to a line that bisects the longitudinal direction or the depth direction.
(6) As described in claim 6, when the pinpoint gate is an odd number of 3 or more, the pinpoint gate is divided into a virtual first area and a virtual second area with a line that bisects the longitudinal direction or the depth direction as a boundary. The number of gates is increased by one in either the virtual first region or the virtual second region, and the gate position is asymmetrically arranged with respect to a line that bisects the longitudinal direction or the depth direction. In addition, the gate itself is not arranged on a line that bisects, and is arranged so that a weld line (resin fusion part) does not occur on the line that bisects.

In the illustrated mold structure of the housing 12 of the connector 10, when the pinpoint gate 11 is temporarily folded back by a line 64 that bisects the space forming the housing 12 in the longitudinal direction, The virtual second area 62 is divided into two points in the virtual first area 60 and one point in the virtual second area 62. When the pinpoint gates 11 are the first gate 111, the second gate 112, and the third gate 113, the second gate 112 and the third gate 113 are asymmetric (the distance from the bisector 64 is different). The first gate 111 is disposed further outward than the second gate 112. That is, the first gate 111 is displaced from the bisector 64 by 8.4 mm, the second gate 112 is displaced from the bisector 64 by 1.5 mm, and the third gate 113 is displaced from the bisector 64 by 4.8 mm. Yes.
Considering the reduction of the warp, it is desirable that the distance between the pinpoint gates 11 be narrowed according to the length in the longitudinal direction or the depth direction of the insulator. Ideally, it should be about 1.0 to 5.0 mm.

  As an application example of the present invention, it is used for molding an insulator (for example, a housing) used for a connector or the like used for a mobile phone, a notebook computer, a digital camera, etc., and particularly a box type having a thickness of 0.1 to 3 mm. The present invention relates to a molding method for producing a shaped insulator so as not to warp.

(A) Drawing explaining the gate position in a connector. (B) Drawing explaining the gate position in a connector different from (A). (C) Furthermore, the drawing explaining the gate position in another connector. (D) Furthermore, the drawing explaining the gate position in another connector. Explanatory drawing at the time of loading the intensity | strength of an insulator. Drawing showing the positive and negative direction of warping. FIG. 1A shows the warpage between the prior art and the present application. FIG. 1A shows the conventional strength and the strength of the present application. A warp between the conventional case and the present application in the case of FIG. The intensity | strength of the past and this application in the case of FIG. 1 (B) is shown. FIG. 1C shows the warpage between the conventional technique and the present application. FIG. 1C shows the conventional strength and the strength of the present application. FIG. 1D shows the warpage between the conventional technique and the present application. The intensity | strength of the past and this application in the case of FIG.1 (D) is shown. It is the perspective view which looked at the connector of the present invention from the upper part by the side of a fitting mouth. It is a perspective view of a housing. It is a perspective view of a 1st contact. It is a perspective view of a rotation member. FIG. 15 is a perspective view of a second contact different from FIG. 14. It is explanatory drawing explaining the movement of a press part and a rotating shaft when a rotation member rotates.

DESCRIPTION OF SYMBOLS 10 Connector 11 Gate 111 1st gate 112 2nd gate 113 3rd gate 12 Housing 14 1st contact 15 2nd contact 16 Turning member 18 Fitting port 19, 191 1st piece 20 1st receiving part 201 2nd receiving Parts 21, 211 second piece 22 first contact part 221 second contact part 23 ceiling part 24 first connection part 241 second connection part 26 first projection part 261 second projection part 28 shaft 30 locking hole 31 first elasticity Connecting portion 311 Second elastic connecting portion 32 First fulcrum portion 321 Second fulcrum portion 34 First elastic portion 341 Second elastic portion 36 Pressing portion 37 Operating portion 38 Insertion hole 42 First fixing portion 421 Second fixing portion 44 First Extension part 441 Second extension part 50 Rotating shaft 52 Upper end 54 Lower end 60 Virtual first area 62 Virtual second area 64 Bisecting line

Claims (14)

The insulator is substantially symmetrical with respect to the line that bisects the longitudinal direction or the depth direction, and at least two pinpoint gates having the same molding conditions, the same shape, the same material, the same size and shape are provided. In the method of forming an insulator to be used,
The pinpoint gate, without providing a line bisecting the longitudinal direction or the depth direction, and bisecting line to weld line (resin fused portion) is rather name that is generated, the weld lines (resin A method of molding an insulator, wherein the fusion portion is disposed at a position shifted from the line equally divided into two to prevent warping of the insulator. The pinpoint gate is arranged in a line that bisects the longitudinal direction or the depth direction. If the insulator is folded, the gate is arranged so that the gate does not overlap to prevent warping of the insulator. The method for molding an insulator according to claim 1 . The pinpoint gate is an even number, and the pinpoint gate is disposed on both sides of the bisecting line at positions having different distances from the bisecting line. 3. A method for molding an insulator according to 2. When the pinpoint gate is an even number, it is divided into a virtual first area and a virtual second area with a line that bisects the longitudinal direction or the depth direction as a boundary, and the number of gates is divided into the virtual first area and the virtual second area. 4. The warp of the insulator according to claim 3, wherein the gate positions are asymmetrically arranged with respect to a line that bisects the longitudinal direction or the depth direction, and the insulator is prevented from warping. Insulator molding method . 3. The method of forming an insulator according to claim 1, wherein the pinpoint gate is an odd number. When the number of the pinpoint gates is an odd number of 3 or more, the pinpoint gate is divided into a virtual first region and a virtual second region with a line that bisects the longitudinal direction or the depth direction as a boundary, and the number of gates is divided into the virtual first region One more in one of the virtual second regions, and the gate position is asymmetrically arranged with respect to a line that bisects the longitudinal direction or the depth direction, and the gate itself is divided into two equal parts. 6. The insulator is prevented from warping by disposing it so that a weld line (resin fusion part) does not occur on the line that is divided into two equal parts without being disposed on the line. Molding method of insulator. The method for molding an insulator according to claim 1, wherein the insulator has a box shape with a thickness of 0.1 to 3 mm. The method for molding an insulator according to claim 1, wherein the insulator is a connector housing. A mold structure used in the molding method according to claim 1. A connector using the insulator molded by the molding method according to claim 1 . The insulator has a fitting port into which a flexible printed circuit board (FPC) or a flexible flat cable (FFC) is inserted on one side in the depth direction, and a plurality of contacts that are inserted and held on one side or both sides. The connector according to claim 10, further comprising an insertion hole. The connector according to claim 11, wherein the insulator has a space in which a rotating member acting on a contact is mounted on the opposite side of the fitting port. As the contact, a first piece having a first contact portion at one end and a first pressing portion at the other end, a second piece having a first connection portion at the other end, the first contact portion, and the first connection portion. And a first elastic part and a first fulcrum part connecting the first piece and the one end of the second piece, the first contact part, the first elastic part and the first piece. A first contact in which the fulcrum part and the first connection part are arranged in a substantially crank shape, or a first piece having a second contact part at one end and a second pressing part at the other end, and a second connection part at one end. A second elastic part and a second fulcrum part, which are located between the second piece, the second contact part and the second connection part and connect the other end of the first piece and the second piece; A second contact for disposing the second contact portion, the second elastic portion, the second fulcrum portion, and the second connection portion in a substantially U-shape; The connector of claim 12, wherein the door. The rotating member is provided with separate and independent locking holes for receiving the first and second pressing portions of the first contact or the second contact, and the first contact or the first contact of the second contact. The connector according to claim 13, further comprising a pressing portion that acts on the pressing portion and the second pressing portion.

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