JP5566441B2 - Connector packing structure - Google Patents

Description

  The present invention relates to a connector packing structure in which a film provided in a terminal insertion hole of a packing in a connector is broken by inserting a terminal.

  16 (a) and 16 (b) show one form of a conventional connector packing structure (see Patent Document 1).

  As shown in FIG. 16A, this structure has a plurality of terminals arranged in a matrix in a rubber mat-type waterproof packing 61 attached to an opening of an insulating resin connector housing (not shown). A film 63 is integrally formed inside the insertion hole 62, left and right step portions 64 are formed on the front and back surfaces of the film 63, and a straight thin film portion 65 is formed between the left and right step portions 64. FIG. ), The film 63 is pierced as the terminal 66 is inserted, and the lip 67 in the insertion hole 62 is brought into close contact with the outer peripheral surface of an electric wire (not shown) connected to the terminal 66.

  A connector is comprised by the connector housing, the terminal 66, and packing. The reason why the film 63 is used is that the terminals are not necessarily inserted into all of the plurality of terminal accommodating chambers of the connector housing. Therefore, the terminal insertion hole 62 (terminal accommodating chamber) through which the terminal is not inserted is blocked with the film 63, This is to prevent entry of water, dust, or the like from the terminal insertion hole 62 into the connector. In FIG. 16, the symbol m indicates the center line of the terminal insertion hole 62.

French Patent Publication FR 2844645-A1 (FIG. 2)

  However, in the above conventional connector packing structure, for example, when an operator mistakenly inserts the terminal 66 into a different terminal insertion hole 62 and breaks through the film 63, it is reinserted into the regular terminal insertion hole. Since the water permeates into the connector from the perforated film 63, the presence or absence of perforation of the film 63 in the unused terminal insertion hole 62 (the terminal 66 is not inserted) is, for example, an inspection pin. In this inspection, the wires in the adjacent terminal insertion holes compress the piercing 68 at the time of erroneous insertion in the radial direction, thereby closing the piercing 68, There was a concern that water leaked into the connector from the perforations during use of the connector in a vehicle or the like without air leakage being confirmed.

  In view of the above points, the present invention, when a terminal is mistakenly inserted to break through a film in an unused terminal insertion hole, even if an electric wire is inserted into an adjacent terminal insertion hole, the presence / absence of perforation is checked. An object of the present invention is to provide a packing structure for a connector that can perform the determination with high accuracy and can easily break the film in the terminal insertion hole.

In order to achieve the above object, the connector packing structure according to claim 1 of the present invention is provided with a plurality of terminal insertion holes arranged in parallel in a matrix in the packing body attached to the connector, and the inside of the terminal insertion holes. Is provided with a substantially S-shaped groove portion in which a pair of arc-shaped portions are symmetrically arranged from one end to the other end of the film , so that a substantially S-shaped thin film portion is formed on the bottom surface side of the groove portion. The thin film is formed at the time of erroneous insertion of a terminal into an unused terminal insertion hole, and the direction connecting one end and the other end of the film and the direction orthogonal to the direction coincide with the arrangement direction of the plurality of terminal insertion holes. Perforations are formed over the entire length of the part, and compression is performed when an electric wire having a diameter larger than the lip in the terminal insertion hole is inserted into the terminal insertion hole adjacent to the unused terminal insertion hole following the terminal. By force, a part of the perforation is kept open .

  With the above configuration, when a terminal is mistakenly inserted into and extracted from the terminal insertion hole of the packing body, the substantially S-shaped thin film portion (groove portion) of the film of the terminal insertion hole is broken to form a substantially S-shaped perforation. However, when the electric wire with a terminal is inserted into the adjacent terminal insertion hole, the thin film portion is substantially S-shaped and symmetric, so that the substantially S-shaped perforation is in the lateral direction of the groove (perpendicular to the longitudinal direction of the groove). Direction and groove width direction) (when the groove width direction and the arrangement direction of each terminal insertion hole are the same), the both end portions and the central portion of the substantially S-shaped perforation are surely opened. When the substantially S-shaped perforations remain compressed in the longitudinal direction of the groove (when the longitudinal direction of the groove and the arrangement direction of the terminal insertion holes are the same), both end portions of the substantially S-shaped perforations The part except the central part is surely opened and remains. Further, when the terminal is properly inserted into the terminal insertion hole of the packing body, the substantially S-shaped thin film portion (groove portion) is smoothly and largely broken.

In the packing structure for a connector according to claim 2, a plurality of terminal insertion holes are provided in a matrix in parallel in a packing body attached to the connector, a film is provided inside the terminal insertion hole, A circular arc-shaped thin film portion is formed on the bottom surface side of the groove portion by providing an arc-shaped groove portion on the film along the inner peripheral surface, and a direction orthogonal to the direction connecting the longitudinal ends of the groove portion. Coincides with the direction in which the terminal insertion holes are arranged , and when the terminals are erroneously inserted into the unused terminal insertion holes, a hole is formed in the thin film portion over the entire length, and the terminals adjacent to the unused terminal insertion holes The insertion hole is maintained in a state where a part of the perforation is opened by a compressive force when an electric wire having a diameter larger than the lip in the terminal insertion hole is subsequently inserted into the terminal. It is characterized by.

  With the above configuration, when a terminal is mistakenly inserted into and extracted from the terminal insertion hole of the packing body, the arc-shaped thin film portion of the film of the terminal insertion hole is broken to form an arc-shaped perforation. When an electric wire with a terminal is inserted into the arc, the arc-shaped perforations are compressed in the perforation longitudinal direction (terminal insertion hole arrangement direction), so that at least the central portion of the perforations is perpendicular to the compression direction (groove width direction) Remains open. Further, when the terminal is normally inserted into the terminal insertion hole of the packing body, the membrane is smoothly broken in the circumferential direction of the terminal insertion hole starting from the arc-shaped groove (thin film portion). When the cross-sectional shape of the terminal is rectangular, it is preferable that the corner portion at the tip of the terminal is in contact with the arc-shaped groove portion (thin film portion) to break the thin film portion.

The connector packing structure according to claim 3 is the connector packing structure according to claim 2, wherein a center angle of the arc-shaped groove is defined to be 90 ° or more corresponding to a terminal having a square cross section. Features.

With the above structure, when the cross-sectional shape of the tip of the pin is square, upon insertion of the terminal, the corners of the tip of the pin is securely in contact with the arc-shaped groove portion (thin portion), breaks through the thin film portion The film breakage starting from the thin film portion is smoothly and reliably performed. When the cross-sectional shape of the tip of the terminal is a rectangle and the long side of the rectangle is located along the longitudinal direction of the groove, the corner of the tip of the terminal is set to 90 ° or more by setting the central angle of the groove to 90 ° or more. Abuts securely in the groove. Even in the case of a square cross section, by setting the angle to 90 ° or more, two adjacent corner portions of the terminal are simultaneously brought into contact with the groove portion, so that the perforation is more smoothly and reliably formed.

In the packing structure for a connector according to claim 4, a plurality of terminal insertion holes are provided in a matrix in parallel in a packing body attached to the connector, a film is provided inside the terminal insertion hole, and an outer peripheral side of the film a portion groove portion that is provided is a thin film portion is formed on the bottom side of the groove portion, perforated membrane opens in terminal insertion holes of unused, terminal insertion holes adjacent to the terminal insertion hole of said non use In addition, when the electric wire having a diameter larger than the lip in the terminal insertion hole is inserted subsequently to the terminal, the groove portion absorbs the compression force when the hole is about to close. It is characterized by preventing clogging of perforations .

With the above configuration, when a terminal is mistakenly inserted, perforation opens in the membrane, and when the membrane is compressed in the insertion hole radial direction by the electric wires with terminals on both sides, the groove portion absorbs the compressive force of the membrane, that is, compressive deformation, thereby blocking the perforation. prevent. At the time of regular terminal insertion, the membrane is smoothly broken from the thin film portion of the groove portion, and the terminal with electric wire is smoothly inserted.

  According to the first aspect of the present invention, even when the terminal is mistakenly inserted into the terminal insertion hole and the thin film portion is pierced, when the electric wire with the terminal is inserted into the adjacent terminal insertion hole, the substantially S-shaped symmetrical shape is obtained. The thin film portion maintains the perforated portion in an open state regardless of the direction from which the thin film portion is compressed. As a result, the use of the packing with a hole is prevented, and it is possible to prevent water or the like from entering the connector from the perforation of the packing and causing an electrical failure of the connector. In addition, since the thin film portion is formed in a substantially S shape, the thin film portion is easily and smoothly broken in a large range when the terminal is normally inserted, and the insertion property of the terminal is improved.

  According to the second aspect of the present invention, even when the terminal is mistakenly inserted into the terminal insertion hole and the thin film portion is pierced, the arc-shaped perforation is formed in the longitudinal direction when the electric wire with the terminal is inserted into the adjacent terminal insertion hole. Since it is compressed and maintained in the open state in the short direction, the presence of perforation is reliably detected in the inspection for the presence or absence of perforation. As a result, the use of the packing with a hole is prevented, and it is possible to prevent water or the like from entering the connector from the perforation of the packing and causing an electrical failure of the connector. In addition, since the thin film portion is formed in an arc shape, when the terminal is normally inserted, the film of the terminal insertion hole is easily and smoothly broken with a small force along the circumferential direction of the insertion hole, starting from the arc-shaped thin film portion. Thus, the insertion property of the terminal is enhanced.

According to the third aspect of the invention, when inserting the cross-section square terminal, membrane corners of the terminals that from break through a thin film portion securely contact with the arc-shaped groove, starting from the thin portion Can be more easily and smoothly performed.

According to the invention of claim 4, even when a perforation is opened in the membrane when the terminal is mistakenly inserted, the groove portion absorbs the compressive deformation of the membrane due to the adjacent electric wire, so that the perforation is prevented from being blocked. The inspection can reliably detect the presence of perforations and reliably prevent defective products from flowing out.

1A and 1B show a first embodiment (reference example) of a connector packing structure according to the present invention, in which FIG. The principal part of a packing structure is shown similarly, (a) is the perspective view seen from the front side, (b) is the perspective view seen from the back side. (A) is a longitudinal cross-sectional view when the film | membrane inside packing is fractured | ruptured, (b) is a longitudinal cross-sectional view when a film | membrane is decompress | restored. It is a longitudinal cross-sectional view of the state which made the electric wire penetrate the adjacent terminal insertion hole, and compressed the film | membrane. The second embodiment of the packing structure for a connector according to the present invention is shown, (a) is a perspective view with a partial cross section, (b) is a vertical cross-sectional view of the main part, and (c) is a plan view of the main part. It is a longitudinal cross-sectional view which shows a state when the film | membrane inside packing is fractured. It is a longitudinal cross-sectional view of the state which made the electric wire penetrate the adjacent terminal insertion hole, and compressed the film | membrane. (A) (b) is a top view of the state which compressed the fracture | ruptured film | membrane from the different direction. (A) (b) is a top view explaining the opening principle when compressing the fracture | ruptured film | membrane from a different direction. The third embodiment of the packing structure for a connector according to the present invention is shown, (a) is a perspective view with a partial cross-section, (b) is a vertical cross-sectional view of the main part, and (c) is a plan view of the main part. The state when the film | membrane inside packing is fractured | ruptured is shown, (a) is a longitudinal cross-sectional view, (b) is a top view. 4A and 4B show a fourth embodiment (reference example) of a connector packing structure according to the present invention, in which FIG. (Transverse sectional view). Similarly, the state at the time of fracture | rupture of the film | membrane inside packing is shown, (a) is a top view, (b) is a longitudinal cross-sectional view. 5A and 5B show a fifth embodiment of a connector packing structure according to the present invention, wherein FIG. 5A is a perspective view with a partial cross-section, FIG. 5B is a vertical cross-sectional view of the main part, and FIG. Figure). It is a longitudinal cross-sectional view which shows the state which compressed the film | membrane with a hole similarly with the adjacent electric wire. The principal part of one form of the conventional connector packing structure is shown, (a) is a longitudinal sectional view, and (b) is a longitudinal sectional view when a film inside the packing is broken.

  1 to 4 show a first embodiment (reference example) of a packing structure for a connector according to the present invention.

  As shown in FIGS. 1 and 2, this packing structure is formed by forming a film 3 in a plurality of terminal insertion holes 2 in a synthetic rubber (elastic) mat-type waterproof packing 1 in a stepped shape. Each film part 3a, 3b is connected to each other by a thin film part (thin part) 5 perpendicular to the longitudinal direction (axis) of the insertion hole in the central step part 4.

  As shown in FIG. 3, along with the insertion of the terminal 6 into the terminal insertion hole 2 (including erroneous insertion), the vertical thin film portion 5 of the film 3 is broken to form a hole 7 in the insertion hole radial direction (horizontal direction). The perforations 7 connect the lower hole space 2a of the upper film portion 3a and the upper hole space 2b of the lower film portion 3b.

  As shown in FIG. 4, the conductor 8 connected to the terminal 6 is introduced into the terminal insertion hole 2 ′ adjacent to the erroneous insertion terminal insertion hole 2 to compress and deform the erroneous insertion terminal insertion hole 2 in the radial direction. Even in the case (the compression force is indicated by P), the perforation 7 of the membrane 3 of the erroneously inserted terminal insertion hole 2 is compressed in the perforation axis direction (insertion hole radial direction) to ensure a perforated state (rather than the initial perforation diameter). Also, the presence of perforations is reliably detected by an inspection pin (not shown) or an air leak inspection.

  As shown in FIG. 1 (a), the packing 1 is composed of a plate-shaped packing body 9 in the horizontal direction and a hook-shaped portion 10 projecting outward on the lower end side of the packing body 9, and the packing body 9 has a plurality of terminals. The insertion holes 2 are formed at equal pitches in the XY direction, and each terminal insertion hole 2 in this example is close (adjacent) in the X direction and spaced in the Y direction. A lip 10 a is provided on the outer peripheral surface of the bowl-shaped portion 10.

  The packing 1 is mounted in the space of the bottom of a connector housing (not shown) made of an insulating resin (not shown) (the rear when the connector fitting surface is the front), the lip 10a is in close contact with the inner surface of the connector housing, and a terminal with an electric wire 8 6 is inserted into each terminal accommodating chamber of the connector housing through each terminal insertion hole 2 of the packing 1, and each electric wire 8 is in close contact with the small-diameter lip 11 on the inner peripheral side of each terminal insertion hole 2.

  In the packing 1 of this example, two lips 11 are provided on the upper half (first half) side of the terminal insertion hole 2, and the film 3 is provided on the lower half (second half) side in a single step. In the specification, the directions of up, down, front, back, left, and right are for convenience of explanation, and do not necessarily coincide with the connector arrangement direction.

  As shown in FIGS. 1B and 2A and 2B, the terminal insertion hole 2 is formed in a circular cross section, and the opening portions 12 and 13 of the terminal insertion hole 2 are expanded in a rectangular shape on the front and back surfaces of the packing 1. It is a diameter. The film 3 continues in a stepped shape up and down, the lower surface of the lower film part 3 b is positioned on the same horizontal plane as the rectangular opening 13, and the upper surface of the lower film part 3 b is semicircular in the insertion hole 2. And the lower surface of the upper film portion 3a communicates with the rectangular opening portion 13 via the semicircular space 2a, and the upper surface of the upper film portion 3a is positioned in a semicircular shape in the insertion hole 12. .

  As shown in FIGS. 2A and 2B, the upper and lower film portions 3a and 3b are connected to each other by a thin film portion 5 raised in the vertical direction (longitudinal direction of the insertion hole) at the center of the insertion hole 2. The upper and lower film parts 3a and 3b are separated from each other in the terminal insertion direction, that is, the upper surface 3bc of the lower film part 3b is positioned lower than the lower surface 3ac of the upper film part 3a, and the lower surface 3ac of the upper film part 3a is located. And the upper surface 3bc of the lower film part 3b are parallel to each other, and the thin film part 5 is raised (extends) perpendicularly to the terminal insertion direction so as to fill the gap between the upper and lower film parts 3a, 3b. The upper and lower film portions 3a and 3b are connected to each other. Both the film portions 3a and 3b are separated by an interval of the rising length H of the thin film portion 5.

  The rising length (the vertical distance between the lower surface 3ac of the upper film portion 3a and the upper surface 3bc of the lower film portion 3b) H is set larger than the thickness of the thin film portion 5 in this example. Yes. It is also possible to set the startup length H to be approximately the same as the thickness of the thin film portion 5. In short, the compressive force P when the electric wire 8 is inserted into the adjacent terminal accommodating chamber 2 ′ is released in the radial direction between the pair of left and right membrane portions 3a and 3b (of the pair of membrane portions 3a and 3b). The rising length of the thin film portion 5 may be set so that a gap is opened therebetween.

  The thin film portion 5 integrally connects the lower surface of the upper semicircular film portion 3a and the upper surface of the lower semicircular film portion 3b. The center end face (substitute with reference numeral 4) of the upper film part 3a is located on the same vertical plane as the inner face (surface inside the insertion hole) 5a of the thin film part 5, and the center end face (reference sign) of the lower film part 3b. 4 is substituted on the same vertical plane as the outer surface (surface outside the insertion hole) 5b of the thin film portion 5. The left and right ends 5c of the thin film portion 5 are integrally connected to the inner peripheral surface 2c of the terminal insertion hole 2 perpendicularly to the radial direction.

  The thin film portion 5 is formed by forming the film 3 between horizontal surfaces of upper and lower molding dies (not shown) during molding of the packing 1 and orthogonal to the horizontal surfaces of the upper and lower molding dies. The thin film portion 5 can be easily formed between the vertical surfaces.

  If the thin film portion 5 is eliminated, a slit-like gap in the insertion hole radial direction is opened between the upper and lower film portions 3a and 3b that are semicircular in plan view. When the thin film portion 5 is broken, a hole 7 in the insertion hole radial direction (horizontal direction) is opened between the upper and lower film portions 3a and 3b (see FIG. 3B).

  3A, when the terminal 6 is inserted, the upper and lower film portions 3a and 3b are sheared in the terminal insertion direction by the tip 6a of the terminal 6, and the upper and lower film portions are inserted as the terminal 6 is inserted. The parts 3a and 3b are pushed outward and are located between the outer surface 6b of the terminal 6 and the inner surface 2c of the insertion hole 2.

  As shown in FIG. 3B, when the terminal 6 is erroneously inserted, the upper and lower film parts 3a and 3b are elastically restored by extracting the terminal 6 once inserted, but between the upper and lower film parts 3a and 3b. Since the thin film portion 5 is perforated in the horizontal direction (insertion hole radial direction), the terminal insertion hole 2 communicates with the outside through the perforation 7, and the terminal-attached electric wire 8 is connected to the adjacent terminal insertion hole 2 'as shown in FIG. Even when inserted, the perforated state is maintained, and the presence of perforation is reliably detected by the inspection for perforation as described above.

  In the first embodiment, the film 3 is provided on the lower half side of the terminal insertion hole 2. However, the film 3 is not limited to the lower half side, and is provided on the upper half side of the terminal insertion hole 2. It is also possible to provide it. However, when the presence or absence of perforations 7 of the membrane 3 is inspected with the inspection pin (the inspection pin insertion stroke is detected by piercing the membrane 3 with the inspection pin), the membrane 3 is placed on the lower half side of the terminal insertion hole 2, that is, toward the outside. The inspection pin can be provided with a shorter insertion stroke of the inspection pin, making inspection easier and more reliable.

  Moreover, in the said embodiment, although the rectangular expanded opening parts 12 and 13 were formed in the opening side of the terminal insertion hole 2, these opening parts 12 and 13 are for rubber molding, and are not necessarily required, For example, when the terminal insertion hole (2) having a diameter larger than that of FIG. 1 is formed (when two types of insertion holes are formed in one packing 1), the opening portions 12 and 13 are made circular or excluded. It is also possible to do. As an example, the packing 1 is rectangular and has a small length of about 2 to 3 cm.

  Moreover, in the said embodiment, although the thin film part 5 was linearly formed in the insertion hole radial direction, the thin film part 5 is formed in a curved shape in the insertion hole radial direction like the shape of the thin film part in embodiment mentioned later, for example. It is also possible.

  5 to 9 show a second embodiment of the connector packing structure according to the present invention.

  As shown in FIGS. 5A to 5C, this packing structure is formed in the insertion hole radial direction (horizontal direction) inside the plurality of terminal insertion holes 17 in the mat-type waterproof packing 16 made of synthetic rubber (elastic). A flat film 18 without a step is formed, and a substantially S-shaped groove 19 is formed at the center of the upper surface (inner side surface) of the film 18.

  As shown in FIG. 6, with the insertion of the terminal 6 into the terminal insertion hole 17 (including erroneous insertion), the horizontal film 18 is broken from the substantially S-shaped groove portion 19 and is substantially S-shaped in plan view in the horizontal direction. Perforations 20 (see FIG. 7) are formed, and the perforations 20 allow the upper and lower insertion hole spaces 17a and 17b of the membrane 18 to communicate with each other.

  As shown in FIG. 7, the lead wire 8 connected to the terminal 6 is introduced into the terminal insertion hole 17 ′ adjacent to the erroneous insertion terminal insertion hole 17 to compress and deform the erroneous insertion terminal insertion hole 17 in the radial direction. Even in this case, as shown in FIGS. 8A and 8B, the substantially S-shaped perforation 20 of the film of the erroneously inserted terminal insertion hole 17 creates gaps 20a to 20c in a direction perpendicular to the compression deformation direction, The perforated state is maintained (the gap is smaller than that of the S-shaped groove portion 19), and the presence of the perforated 20 is surely detected by an inspection pin or an air leak inspection (not shown).

  As shown in FIG. 5A, the packing 16 includes a plate-shaped packing body 21 in the horizontal direction and a hook-shaped portion 22 protruding outward on the lower end side of the packing body 21, and the packing body 21 has a plurality of terminals. The insertion holes 17 are formed at equal pitches in the XY direction, and each terminal insertion hole 17 in this example is close (adjacent) to the X direction and spaced apart in the Y direction. A lip 22 a is provided on the outer peripheral surface of the bowl-shaped portion 22.

  The packing 16 is mounted in the space at the bottom of the connector housing (not shown) made of insulating resin (the rear when the connector fitting surface is the front), the lip 22a is in close contact with the inner surface of the connector housing, and the terminal with the electric wire 8 6 is inserted into each terminal accommodating chamber of the connector housing through each terminal insertion hole 17 of the packing 16, and each electric wire 8 is in close contact with the small-diameter lip 23 on the inner peripheral side of each terminal insertion hole 17.

  In the packing 16 of this example, two lips 23 are provided on the upper and lower opening sides of the terminal insertion hole 17, and the film 18 is provided in a thin plate shape at the center in the longitudinal direction of the insertion hole 17. In the specification, the directions of up, down, front, back, left, and right are for convenience of explanation, and do not necessarily coincide with the connector arrangement direction.

  As shown in FIGS. 5B and 5C, the terminal insertion hole 17 is formed in a circular cross section, and the opening portions 25 and 26 of the terminal insertion hole 17 are expanded in a rectangular shape on the front and back surfaces of the packing 16. The film 18 is formed with a uniform thickness horizontally in the insertion hole diameter direction, and the upper and lower surfaces of the film 18 are positioned in parallel.

  A groove portion 19 is formed in a substantially S shape from the inner surface 17c on one side of the insertion hole 17 to the inner surface 17c on the other side opposite to 180 ° so as to cross the film 18 at the center of the upper surface of the film 18. 19a continues across the inner surface 17c of the insertion hole. A thin film portion 27 is formed between the bottom surface 19 b of the groove portion 19 and the lower surface of the film 18. The thickness of the thin film portion 27 in this example is about half of the thickness of the film 18. The thin film portion 27 is formed in the vertical direction (terminal insertion direction) with respect to the groove portion 19 (on the lower side of the groove portion 19) as in the first embodiment.

  The thin film portion 27 is formed by forming the film 18 between the horizontal surfaces of the upper and lower molding dies (not shown) at the time of molding the packing 16, and at the same time suspending it on the horizontal surface of the upper molding die. By forming the groove portion 19 in the film 18 with the substantially S-shaped ridge, the thin film portion 27 can be easily formed between the ridge and the horizontal surface of the lower molding die.

  If the substantially S-shaped thin film portion 27 is eliminated, a substantially S-shaped slit-shaped gap is opened at the center of the circular film 18 in plan view. By tearing the thin film portion 27, a horizontal S-shaped perforation 20 is opened between the left and right film portions 18a and 18b.

  As shown in FIG. 6, when the terminal 6 is inserted, the film 18 is sheared in the terminal insertion direction in the S-shaped groove portion 19 at the tip portion 6 a of the terminal 6, and the left and right film portions 18 a are inserted as the terminal 6 is inserted. , 18b are pushed outward and positioned between the outer surface 6b of the terminal 6 and the inner surface 17c of the insertion hole 17.

  As shown in FIG. 7, when the terminal 6 is erroneously inserted, the terminal 6 once inserted is removed from the terminal insertion hole 17 so that the left and right film portions 18a and 18b are elastically restored to leave a substantially S-shaped perforation 20. Close. When the terminal-attached electric wire 8 is inserted into the adjacent terminal insertion hole 17 ′, as shown in FIG. 8A, the substantially S-shaped perforation 20 is compressed in the perforation width direction (from the direction orthogonal). When the substantially S-shaped central portion 20b and both end portions 20a are opened and remain as perforations, and the substantially S-shaped perforations 20 are compressed in the longitudinal direction of the perforation as shown in FIG. A pair of symmetric arcuate portions 20c in the middle, excluding the central portion of the character shape and both end portions, open and remain as perforations, and the presence of perforations is reliably detected by the inspection for the presence or absence of perforations as described above.

  The principle that the perforations 20a to 20c in FIG. 8 remain will be supplementarily described with reference to FIG. 9. As shown in FIG. 9A, the compressive force P is applied from the direction perpendicular to the straight perforations 20 ′ of the membrane 18. In this case, the perforation 20 ′ is closed. However, as shown in FIG. 9B, if a compressive force P is applied to the straight perforations 20 'of the membrane 18 in the longitudinal direction of the perforations, the perforations 20' are greatly opened.

  Since the central portion 20b of the substantially S-shaped perforation 20 and the pair of symmetrical end portions 20a in FIG. 8A are curved in an arc shape in the direction of the compressive force P, the opening force in FIG. F acts, and an intermediate pair of symmetrical arcuate portions 20c excluding the central portion and both end portions of the substantially S-shaped perforation 20 in FIG. 8B is curved in an arc shape in the direction of the compressive force P. Therefore, the opening force F in FIG. 9B acts. Similarly, when the compressive force P is applied from a direction other than FIGS. 9A and 9B, the opening force is applied to any portion of the substantially S-shaped perforation 20. Thus, even if the substantially S-shaped perforations 20 are compressed, a partial gap is generated.

  In the second embodiment, the film 18 is provided at an intermediate position in the length (axial) direction of the terminal insertion hole. However, the film 18 is not limited to the middle, and is provided on the lower half side or the upper half side of the terminal insertion hole 17. It is also possible.

  Further, in the above embodiment, the rectangular enlarged opening portions 25 and 26 are formed on the opening side of the terminal insertion hole 17. However, the rectangular opening portions 25 and 26 are necessarily used for rubber molding. Instead, for example, when the terminal insertion hole 17 having a larger diameter than that of FIG. 5 is formed (when two types of insertion holes are formed in one packing 16), the opening portions 25 and 26 are made circular, It is also possible to eliminate it. As an example, the packing 16 is rectangular and has a small length of about 2 to 3 cm.

  In the above embodiment, the groove 19 is formed on the upper surface of the film 18, but the groove 19 can be formed on the lower surface of the film 18 instead of the upper surface. Further, the depth of the groove portion 19 with respect to the film 18 (thickness of the thin film portion 27) can be appropriately set so that it can be smoothly cut when a terminal is inserted.

  Moreover, in the said embodiment, although the groove part 19 was formed in the substantially S shape, it was bent or curved not only in a substantially S shape but in a substantially Z shape, a substantially M shape, a substantially L shape, a circular arc shape, etc. It is also possible to form the groove (19). Here, “bend” refers to bending in a straight line or a curve, and “curving” refers to bending in a curve. For example, if it is substantially L-shaped, it includes a shape bent linearly into an L shape and a shape bent curvedly into an L shape. This is because if the groove (19) is bent or curved, a gap is generated in the groove portion in the direction orthogonal to the direction of action of the compressive force P when the electric wire 8 is inserted into the adjacent terminal insertion hole 17 ′. . A symmetrical shape such as a substantially S-shape is more preferable because the gap is formed uniformly (symmetrically).

  10 to 11 show a third embodiment of the connector packing structure according to the present invention.

  As shown in FIGS. 10A to 10C, this packing structure is formed in the insertion hole radial direction (horizontal direction) inside the plurality of terminal insertion holes 32 in the mat-type waterproof packing 31 made of synthetic rubber (elastic). A flat film 33 without a step is formed, and an arcuate (curved) groove 34 is formed at the end of the upper surface (inner surface) 33a of the film 33 along the inner peripheral surface 32c of the terminal insertion hole 32. It is a feature.

  As shown in FIGS. 11A and 11B, as the terminal 6 is inserted into the insertion hole 32 (including erroneous insertion), the horizontal film 33 starts from the groove 34 that is curved in an arc shape. Breaking along the inner peripheral surface 32c (the cut film 33 is connected to the inner surface 32c of the insertion hole at the base end portion 33c opposite to the groove portion 34), the arc-shaped perforation 35 (FIG. 11A) A circular arc-shaped perforation 35 communicates the upper and lower insertion hole spaces 32a, 32b of the membrane 33.

  A conducting wire connected to the terminal 6 (see FIG. 7 of the second embodiment) is introduced into a terminal insertion hole adjacent to the erroneous insertion terminal insertion hole 32, and the erroneous insertion terminal insertion hole 32 is radially arranged. Even when compressed and deformed, a gap is formed on the groove 34 side of the perforation 35 or on the side shifted by 90 ° from the groove, as in the substantially S-shaped groove 19 of the second embodiment, and the perforated state is maintained. Then, it is reliably detected that there is a perforation by an inspection pin (not shown) or an air leak inspection.

  As shown in FIG. 10A, the packing 31 includes a plate-shaped packing body 36 in the horizontal direction and a flange-shaped portion 37 projecting outward on the lower end side of the packing body 36. The packing body 36 has a plurality of terminals. The insertion holes 32 are formed at equal pitches in the XY direction, and each terminal insertion hole 32 in this example is close (adjacent) to the X direction and spaced apart in the Y direction. A lip 37 a is provided on the outer peripheral surface of the bowl-shaped portion 37.

  The packing is mounted in the space at the bottom of the connector housing (not shown) made of an insulating resin (the rear when the connector fitting surface is the front), the lip 37a is in close contact with the inner surface of the connector housing, and the terminal 6 with electric wire is connected. Each terminal insertion hole 32 of the packing 31 is inserted into each terminal accommodating chamber of the connector housing, and each electric wire is brought into close contact with the small-diameter lip 38 on the inner peripheral side of each terminal insertion hole 32.

  In the packing 31 of this example, two lips 38 are provided on the upper and lower opening sides of the terminal insertion hole 32, and the film 33 is provided in a thin plate shape at the center in the longitudinal direction of the insertion hole 32. In the specification, the directions of up, down, front, back, left, and right are for convenience of explanation, and do not necessarily coincide with the connector arrangement direction.

  As shown in FIGS. 10B and 10C, the terminal insertion hole 32 is formed in a circular cross section, and the opening portions 39 and 40 of the terminal insertion hole 32 are enlarged in a substantially rectangular shape on the front and back surfaces of the packing 31, and the lower side. The opening portion 40 of the first and second openings continues to the terminal insertion hole 32 in a tapered shape. The film 33 is formed with a uniform thickness horizontally in the insertion hole diameter direction, and the upper and lower surfaces 33a and 33b of the film 33 are positioned in parallel.

  An arc-shaped groove 34 is formed at one end of the upper surface 33a of the film 33 along the outer periphery of the film 33 with a central angle (opening angle) θ of about 90 ° as an example, and both longitudinal ends 34a and inner peripheral ends of the groove 34 are formed. 34 c is integrated with the membrane 33, and the outer peripheral end 34 d of the groove 34 is integrated with the inner peripheral surface 32 c of the insertion hole 32. A thin film portion 41 is formed between the bottom surface 34 e of the groove portion 34 and the lower surface 33 b of the film 33. The thickness of the thin film portion 41 in this example is about 1/3 of the thickness of the film 33. The thin film portion 41 is formed in the terminal insertion direction (vertical direction) with respect to the groove portion 34 (below the groove portion 34).

  As shown in FIG. 11B, the length of the arc-shaped groove 34 is set such that the corner 6c of the terminal 6 having a rectangular cross section is applied (contacted). In this example, the linear distance connecting both ends 34 a of the arc-shaped groove 34 is set longer than the length L of one side of the terminal 6. When the cross section of the terminal 6 is square, the arcuate groove 34 preferably has a central angle of 90 ° or more.

  If the central angle θ of the groove 34 is 90 °, at least one corner 6 c of the terminal 6 is engaged with the arc-shaped groove 34. Thereby, the groove part 34 can be easily and reliably broken at the corner part 6c of the terminal 6, and the film 33 is formed along the arc-shaped groove part 34 starting from the fractured part by the corner part 6c as the terminal 6 is inserted. The perimeter (32c) can be smoothly cut at a large central angle to make a large hole.

  By forming the thin film portion 41 in an arc shape, it is possible to face the deviation due to the rattling of the terminal 6, and the range (length) of the thin film portion 41 can be set small. The crack length can be increased by drilling from the longitudinal end 34a of the arc-shaped groove 34 at the corner 6c of the terminal 6.

  The thin film portion 41 is formed by forming the film 33 between the horizontal surfaces of the upper and lower molding dies (not shown) at the time of molding the packing 31 and at the same time suspending it on the horizontal surface of the upper molding die. By forming the arc-shaped groove 34 in the film 33 with the substantially arc-shaped projecting ridge, the arc-shaped thin film portion 41 is easily formed between the projecting ridge and the horizontal surface of the lower molding die. be able to.

  As shown in FIG. 11A, when the terminal 6 is inserted, the membrane 33 is sheared from the arc-shaped thin film portion 41 in the terminal insertion direction at the tip portion 6 a of the terminal 6. The film part 33 is pushed and opened outward in the direction opposite to the groove part 34, and is positioned between the outer surface 6 b of the terminal 6 and the inner surface 32 c of the insertion hole 32.

  When the terminal 6 is erroneously inserted, the terminal 6 once inserted is removed from the terminal insertion hole 32, whereby the circular film portion 33 is elastically restored and closed while leaving the arc-shaped perforations 35. As shown in FIG. 8A of the second embodiment, when an electric wire with a terminal is inserted into an adjacent terminal insertion hole, the perforations 35 are compressed in the Y direction (the direction in which the terminal insertion holes 32 are spaced apart). In this case, both side portions 35a in the X direction that are 90 ° out of phase with the groove 34 (thin film portion 41) in the perforation 35 remain open and remain as perforations, and as shown in FIG. When the holes 32 are compressed in the direction in which they are close to each other, the central portion of the perforation 35 on the side of the groove 34 in the Y direction opens and remains as a perforation. The

  Since the perforation 35 in the third embodiment can be opened with a larger gap than the perforations 20a to 20c by the S-shaped thin film portion 27 of the second embodiment, the perforation can be detected more accurately. . It is also possible to form the length of the arc-shaped groove 34 with an open angle of, for example, about 180 °. In this case, two adjacent angles 6c of the terminal 6 having a rectangular cross section (including a rectangle) are circular. The thin film portion 41 can be cut smoothly and surely with a smaller force by reliably contacting the arc-shaped groove portion 34.

  In the third embodiment, the film 33 is provided at an intermediate position in the length (axis) direction of the terminal insertion hole 32. However, the film 33 is not limited to the middle, and is provided on the lower half side or the upper half side of the terminal insertion hole 32. It is also possible to provide it.

  Further, in the above embodiment, the rectangular enlarged opening portions 39 and 40 are formed on the opening side of the terminal insertion hole 32. However, the rectangular opening portions 39 and 40 are not necessarily required for rubber molding. Instead, for example, when the terminal insertion hole 32 having a larger diameter than that of FIG. 10 is formed (when two types of insertion holes are formed in one packing 31), the opening portions 39 and 40 are made circular, It is also possible to eliminate it. As an example, the packing 31 is rectangular and has a small length of about 2 to 3 cm.

  In the above embodiment, the groove 34 is formed on the upper surface of the film 33, but the groove 34 may be formed on the lower surface of the film 33 instead of the upper surface. Further, the depth of the groove 34 with respect to the film 33 (thickness of the thin film portion 41) can be appropriately set so that it can be smoothly cut when a terminal is inserted.

  In the above-described embodiment, the case where the terminal 6 having a rectangular cross section is used has been described. However, the cross section of the terminal 6 is not limited to the rectangular shape, and the film is formed from the thin film portion 41 as a starting point. Can be broken. The same applies to the first and second embodiments.

  The configuration of each of the embodiments described above is effective not only as a connector packing structure, but also as a packing itself or a packing terminal insertion hole structure. In addition, the packing structure of each embodiment includes, for example, packings 1, 16, 31 mounted in a rear opening of a connector housing (not shown) for female terminals, and the female terminals with wires are connected to the terminal insertion holes 2 of the packing. In addition to the case where it is inserted into the connector housing through 17 and 32, the packings 1, 16 and 31 are attached to the bottom of the connector fitting chamber of the connector housing (not shown) for male terminals, and the male terminals are packed. The present invention can also be applied to the case where the connector is inserted into the connector fitting chamber via the terminal insertion holes 2, 17, 32.

  FIGS. 12-13 shows 4th embodiment of the packing structure for connectors in this invention. This packing structure is similar to the embodiment of FIG. 1, and the same components as those in FIG.

  In the packing structure, as in the embodiment of FIG. 1, stepped upper and lower film portions 3a and 3b are formed in the terminal insertion holes 2 of the plate-like packing body 9 of the packing 1 ′ as shown in FIG. And having a thin film part 5 ′ that vertically connects the upper and lower film parts 3a and 3b, the thin film part 5 ′ is arranged obliquely with respect to the packing body 9 as shown in FIGS. In other words, the thin film portion 5 ′ is formed in the direction of the diagonal line 42 of the terminal 6 (FIG. 13) having a rectangular cross section inserted into the terminal insertion hole 2.

  13A, both the left and right (front and rear) ends 5d of the thin film portion 5 ′ are abutted against the opposite corners 6c of the terminal 6 in the direction of the diagonal line 42, and both ends of the thin film portion 5 ′ as shown in FIG. 13B. The thin film portion 5 ′ can be cut smoothly and reliably with the crack length increased from 5d.

  That is, when the terminal 6 is erroneously inserted, the thin film portion 5 ′ is largely cut, so that the perforation 7 is also generated by the compressive force of the terminal-attached conductor 8 (FIG. 4) inserted into the adjacent terminal insertion hole 2 ′ (FIG. 4). Is ensured, and the presence of perforation is reliably detected in the air leak test. The smooth and reliable cutting of the thin film portion 5 ′ is the same when the regular terminal 6 is inserted, and the insertability of the regular terminal 6 into the terminal insertion hole 2 is improved.

  As shown in FIG. 12A, each terminal insertion hole 2 has the arrangement of the upper and lower film portions 3a and 3b reversed for each row, but the direction (inclination direction) of the thin film portion 5 ′ is the respective terminal insertion hole 2. Every one is constant. The thin film portion 5 ′ is located on the same plane as the side surfaces (stepped portions) 4 of the upper and lower film portions 3 a and 3 b, and the direction of the side surface of the thin film portion 5 ′, that is, the direction of the thin film portion 5 ′ is a diagonal line 42 ( It is equal to the direction of FIG.

  The side surface 6b of the terminal 6 (FIG. 13), the side surface 9a of the packing body 9 and the side surfaces 12a and 13a of the rectangular openings 12 and 13 above and below the terminal insertion hole 2 are positioned in parallel. The side surface 6b of the terminal 6 when the terminal is inserted is parallel to the side surface of the insulating resin connector housing (not shown) to which the packing 1 'is inserted. The terminal insertion hole 2 has a circular cross section.

  The terminal 6 (FIG. 13) is a female terminal having a rectangular cylindrical electrical contact portion (represented by reference numeral 6) on the distal end side, and an elastic contact piece (not shown) in the electrical contact portion. The diagonal direction of the terminal 6 is at the tip of the electrical contact portion. The terminal 6 has a wire connection part (not shown) on the proximal end side. The connector housing (not shown) has terminal housing chambers defined by partitions so as to house and insulate each terminal 6 and communicate with each terminal insertion hole 2.

  In the example of FIG. 13A, the inclination angle α of the diagonal line 42 of the terminal 6 having a rectangular cross section is about 30 ° or more, and the direction (inclination angle) of the thin film portion 5 ′ with respect to the side surface 6b of the terminal 6 is the same. is there. The length of the thin film portion 5 ′ in the radial direction of the terminal insertion hole 2 is substantially equal to the length of the diagonal line 42 at the tip of the rectangular cylindrical electrical contact portion of the terminal 6.

  In FIG. 12, reference numeral 10a denotes a lip of the flange 10 on the outer periphery of the packing body, and reference numeral 11 denotes a small-diameter lip in the terminal insertion hole. The upper and lower horizontal film parts 3a and 3b and the vertical thin film part 5 'constitute the film 3.

  When the terminal is inserted, the thin film portion 5 ′ is smoothly and reliably cut with a small crack length with a small force starting from both end portions 5d (FIG. 13). If the terminal 6 is mistakenly inserted and the thin film portion 5 'is cut to open the perforations 7 (FIG. 13), the upper and lower film portions 3a, 3b are compressed by the compressive force of the adjacent conductors (electric wires) 8 (FIG. 4). Even if it wraps in the radial direction, a gap (perforation 7) is formed between the upper and lower membrane parts, and the gap communicates with the upper and lower spaces 2a, 2b of the insertion hole 2. This is the same as the embodiment of FIG.

  When the cross section of the terminal 6 is not rectangular but square, the inclination angle α of the diagonal line 42 of the terminal 6 is 45 °, and therefore the direction (inclination angle) of the thin film portion 5 ′ with respect to the side surface 6 b of the terminal 6. α) is likewise 45 °. The direction (tilt angle) of the thin film portion 5 ′ is appropriately set according to the tilt angle of the diagonal line 42 of the terminal 6.

  When the terminal 6 is not a male terminal but a male terminal, the tab-shaped electrical contact portion of the male terminal has a thin cross-sectional rectangular shape, so that the direction of the thin film portion 5 ′ is directed to the diagonal line 42 of the electrical contact portion. Can be combined. The direction (tilt angle) of the thin film portion 5 ′ with respect to the side surface 6 b of the terminal 6 is as small as 30 ° or less, for example.

  14 to 15 show a fourth embodiment of the connector packing structure according to the present invention. This packing structure is similar to the embodiment of FIG. 10, and the same components as those in FIG.

  This packing structure has a horizontal film 33 in the insertion hole radial direction in each terminal insertion hole 32 of the plate-like packing body 37 of the packing 31 ′ as shown in FIG. A substantially rectangular groove 43 is provided at a part (one place) of the outer periphery of the film 33, and a thin film portion 44 is formed between the upper surface of the groove 43 and the lower surface of the film 33 as shown in FIG. It is characterized by that.

The groove portion 43 is not long like the arc-shaped groove portion 34 in FIG. 10, and the central angle θ of the groove portion 34 in FIG. 10 is about 90 °, whereas the film 33 of the present example as shown in FIG. The central angle of the groove 43 from the center is, for example, about 45 °. Groove 43 is formed in a substantially rectangular shape in a part of the inner circumferential surface 32c of the three sides 43A～43 c and the terminal insertion holes 32 perpendicular.

  Then, as shown in FIG. 15, perforations 45 are opened in the membrane 33 due to erroneous insertion of the terminals 6, and the terminals 6 and the subsequent conductors 8 are inserted into the terminal insertion holes 32 ′ on both sides (adjacent) of the erroneous insertion terminal insertion holes 32. When this is done, the membrane 33 is compressed and deformed in the horizontal direction (in the direction of the insertion hole diameter) as shown by the arrow P from both sides, and the perforation 45 is blocked (the perforation 45 is not detected by the air leak test). The groove 43 absorbs the compressive force P from both sides, that is, the compressive deformation distortion as shown by the oblique arrow P ′, and is compressed and deformed into a small and substantially trapezoidal shape, so that the perforation 45 of the membrane 33 is maintained in an open state. Air leak inspection reliably detects the presence of perforations. The perforation 45 in FIG. 15 is rather expanded as compared with the case where there is no compression force because the compressive force of the membrane 33, that is, the distortion of the membrane 33 is directed to the groove portion 43 as indicated by the oblique arrow P '.

  Note that the shape of the groove 43 is not limited to a rectangular shape, and may be, for example, an arc shape wider than that of FIG. 10 or a triangular shape as long as the force is smoothly absorbed when the film 33 is compressed by the adjacent conductor 8. It may be a shape or the like. Further, the number of the groove portions 43 is not limited to one, and it is also possible to provide three or four symmetrically at two or equal angles.

  Further, the position of the groove 43 is a position along the inner peripheral surface 32c of the terminal insertion hole 32, that is, one side of the groove 43 is a part of the rigid inner peripheral surface 32c. 43 is preferable for efficiently compressive deformation. For example, when the groove portion 43 is provided in the center of the film 33, the groove portion 43 is compressed by a compressive force, but when the small perforation 45 by the erroneous insertion terminal 6 is opened in the thin film portion 44 in the groove portion, the thin film portion 44 is There is a concern that the perforation 45 may be blocked by being compressed.

  In FIG. 15, the membrane 33 may be broken from the groove 43 when the terminal is inserted, and even if the entire thin film portion 44 is broken when the terminal is mistakenly inserted, the width of the groove 43 is blocked even if the compressive force of the adjacent electric wire 8 is received. Since the dimensions are not set, the perforation (not shown) in the groove is reliably detected by the leak inspection.

  One corner 6c (FIG. 13) of the terminal 6 can abut against the thin film portion 44. It is also possible to arrange the thin film portion 44 so that the corner portion 6c of the terminal 6 does not hit the position and use the groove portion 43 only to absorb the compressive force of FIG. Even at the position where the compressive force P acts on the membrane 33 from only one side rather than from both sides, the compressive force absorbing action of the groove 44 is similarly exhibited.

  In the connector packing structure according to the present invention, when a terminal is mistakenly inserted to break through a film in an unused terminal insertion hole, even if an electric wire is inserted into an adjacent terminal insertion hole, the presence or absence of perforation is inspected. In addition to making the determination accurate, it can be used to easily break the membrane in the terminal insertion hole.

6 terminal 6c corner 16, 31, 31 'packing 17, 32 terminal insertion hole 17c, 32c inner peripheral surface 18, 33 film 19, 34, 43 groove 20, 35, 45 perforation 21, 36 packing main body 27, 41, 44 Thin film part θ Center angle

Claims (4)

A plurality of terminal insertion holes are provided in a matrix in parallel in the packing body attached to the connector, a film is provided inside the terminal insertion holes, and a pair of arc-shaped portions are symmetrically formed from one end to the other end of the film. By providing the arranged substantially S-shaped groove portion, a substantially S-shaped thin film portion is formed on the bottom surface side of the groove portion, and a direction connecting one end and the other end of the film and a direction orthogonal to the direction are formed. A terminal that coincides with the direction in which the plurality of terminal insertion holes are aligned and that is formed in the thin film portion over the entire length when the terminal is erroneously inserted into the unused terminal insertion hole, and that is adjacent to the unused terminal insertion hole A connector characterized in that a part of the perforation is maintained in an open state by a compressive force when an electric wire having a diameter larger than the lip in the terminal insertion hole is inserted into the insertion hole following the terminal. Packing structure for A plurality of terminal insertion holes are provided in a matrix in parallel in the packing body attached to the connector, a film is provided inside the terminal insertion hole, and an arc shape is formed in the film along the inner peripheral surface of the terminal insertion hole. by groove is provided, the arc-shaped thin portion is formed on the bottom side of the groove portion, one and the direction in the arrangement direction of the terminal insertion holes perpendicular to the direction and the direction connecting the longitudinal ends of the groove portion When the terminal is mistakenly inserted into the unused terminal insertion hole, a hole is formed in the thin film portion over the entire length, and a lip in the terminal insertion hole is formed in the terminal insertion hole adjacent to the unused terminal insertion hole. A packing structure for a connector, characterized in that a part of the perforation is maintained in an open state by a compressive force when an electric wire having a larger diameter is subsequently inserted into a terminal . 3. The connector packing structure according to claim 2, wherein a center angle of the arc-shaped groove is defined to be 90 [deg.] Or more corresponding to a terminal having a square cross section. A plurality of terminal insertion holes are provided in parallel in a matrix in the packing body attached to the connector, a film is provided inside the terminal insertion holes, and a groove is provided in a part of the outer peripheral side of the film , are thin film portion is formed on the bottom side of the groove, perforation membrane opens in terminal insertion holes of unused, the terminal insertion holes adjacent to the terminal insertion hole of said non use, than the lip in the terminal insertion hole A connector characterized in that when the hole is about to be closed by a compressive force when a large-diameter electric wire is subsequently inserted into the terminal, the groove portion absorbs the compressive force to prevent the hole from being blocked. Packing structure for

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