JP2009231105A - Jack - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a jack capable of reliably carrying out ESD countermeasures without precluding its multipolarity and miniaturization. <P>SOLUTION: The jack includes an insulating jack body 1 having a plastic sleeve 3 protruded from a front wall 2 of the jack body 1 along a plug inserting/extracting direction, a conductive cap 4 for covering the plastic sleeve 3, and an earth terminal 5 through which the cap 4 is electrically connected to a substrate. Near the front wall 2 of the jack body 1, the cap 4 is connected to the substrate through the earth terminal 5. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a jack for plug connection used in electronic devices such as a mobile phone, a digital camera, and a portable audio.

  As a countermeasure against electrostatic discharge (ESD) in a jack, there is a method in which a conductive plug insertion sleeve (base) made of metal is electrically connected to a grounding land portion of a printed wiring board by a ground terminal (see Patent Document 1). . FIG. 4 is an exploded perspective view showing a conventional method for attaching a plug insertion sleeve and a ground terminal to a jack, and FIG. 5 is a cross-sectional view showing an attachment state of the plug insertion sleeve and the ground terminal in the jack of FIG.

  In FIG. 4, reference numeral 100 denotes a plug insertion sleeve (hereinafter referred to as “metal sleeve”), which has a locking step portion 101 on the outer surface, and has an outer diameter that is thinner on one side than the locking step portion 101. . Reference numeral 102 denotes a plastic and insulating jack body that holds a movable contact piece with respect to the plug. A sleeve insertion hole 104 into which a small diameter portion of the metal sleeve 100 can be inserted is opened in the front wall 103 on the plug insertion side. A ground terminal 105 is provided with a flat sleeve contact portion 107 having a sleeve insertion hole 106 that is the same as the sleeve insertion hole 104 of the jack body 102, and a soldering portion 108 extending from the sleeve contact portion 107 is formed. ing.

  When attaching the metal sleeve 100 and the ground terminal 105 to the jack, as shown in FIG. 4, the sleeve contact portion 107 of the ground terminal 105 is overlapped on the inner side of the front wall 103 of the jack main body 102, and the concentric sleeve insertion hole 104. , 106 after inserting the small diameter portion of the metal sleeve 100 from the front of the jack body 102, and then crimping the insertion end portion of the metal sleeve 100 protruding from the sleeve contact portion 107 of the ground terminal 105 to the inside of the jack body 102, As shown in FIG. 5, the front wall 103 of the jack body 102 and the sleeve contact portion 107 of the ground terminal 105 are sandwiched in a superposed state by the caulking portion 109 and the locking step portion 101 of the insertion end portion of the metal sleeve 100. While simultaneously fixing the metal sleeve 100 and the ground terminal 105 to 102, Contacting hold barrel sleeve 100 to the sleeve contact portion 107 of the ground terminal 105.

  The above mounting method has a drawback in that the caulking portion 109 of the metal sleeve 100 is easily deformed by inserting and removing the plug, and there is a high possibility that the metal sleeve 100 may be loose or poorly contact with the ground terminal 105.

  Further, in order to caulk the insertion end of the metal sleeve 100, it is necessary to insert a pin such as a caulking punch into the jack main body 102 from the rear side of the jack main body 102. From the outer diameter of the insertion end of the metal sleeve 100, Since the pin has a large outer diameter, it is necessary to provide a space for inserting the pin in the jack body 102. Since the pin insertion space in this case is larger than the outer diameter of the plug pin, there is a disadvantage that a structure for preventing the twisting at the time of plug insertion / extraction on the inner surface of the jack body 102 cannot be obtained.

  And the said fault is solved with the jack as shown in FIG. 6 and FIG. 7 (refer patent document 2). FIG. 6 is an external perspective view showing a state of attachment of a cap and a ground terminal in another conventional jack, and FIG. 7 is an exploded perspective view showing a method of attaching the cap and the ground terminal to the jack of FIG.

  This jack has a plug insertion sleeve 112 protruding forward from a front wall 111 of the jack body 110 on the plug insertion side, and this plug insertion sleeve (hereinafter referred to as “plastic sleeve”) 112 is made of metal and is conductive. It is covered with a cap 113 (hereinafter referred to as “metal cap”).

  The jack body 110 electrically connects the movable terminals 114 and 115 for signals to the movable terminal insertion portions 116 and 117 for inserting the signal movable terminals 114 and 115 from the rear of the jack body 110, respectively, and the metal cap 113 to the grounding land portion of the board. A ground terminal insertion portion 119 for inserting the ground terminal 118 from the rear of the jack body 110 is provided, and is formed on the outer surface of the plastic sleeve 112. The ground terminal 118 is inserted into the ground terminal mounting groove 119 when the ground terminal 118 is inserted into the ground terminal mounting groove 119. Is provided with a notch 120 capable of fitting the front end portion thereof from the rear.

  Movable terminals 114 and 115 have rear end portions extending downward to form soldered portions 121 and 122 with respect to the substrate, and contact portions 123 and 124 with the plug are formed to extend forward.

  The ground terminal 118 has a rear end portion extending downward to form a soldering portion 125 for the substrate, and a contact portion 126 with the metal cap 113 is formed to extend forward.

  When the movable terminals 114 and 115 are attached to the jack, as shown in FIG. 7, the movable terminals 115 and 116 are inserted into the movable terminal insertion portions 117 and 118 from the rear of the jack body 110, and the movable terminals 115 and 116 are soldered. With the portions 121 and 122 protruding downward in parallel from the rear end of the jack body 110 and the contact parts 123 and 124 of the movable terminals 115 and 116 facing the inside of the jack body 110, the movable terminals are connected to the jack body 110. 115 and 116 are attached. When attaching the metal cap 113 and the ground terminal 118 to the jack, as shown in FIG. 7, the ground terminal 118 is inserted into the ground terminal insertion portion 119 from the rear side of the jack body 110, and as shown in FIG. The soldering portion 125 of the terminal 118 protrudes downward from the rear end portion of the jack body 110 in parallel with the soldering portions 121 and 122 of the movable terminals 115 and 116, and the contact portion 30 b of the ground terminal 118 is notched in the notch of the plastic sleeve 112. The ground terminal 118 is attached to the jack body 110 in a state of being fitted into the portion 120. Thereafter, as shown in FIG. 7, a metal cap 113 is fitted to the plastic sleeve 112 from the front of the jack body 110. The plastic sleeve 112 is covered with the metal cap 113 as shown in FIG. The contact portion 126 of the ground terminal 118 is held in contact with the inner surface.

  This jack does not use the metal sleeve 100 that is fixed to the jack main body 102 by caulking and is electrically connected to the ground terminal 105 unlike the jack shown in FIGS. There is a low risk of looseness of the cap 113 and poor contact with the ground terminal 118. Further, it is not necessary to provide a space larger than the outer diameter of the plug pin in the jack main body 110, and the jack main body 110 and the inner surface of the plastic sleeve 112 can prevent twisting during plug insertion / extraction.

Japanese Utility Model Publication No. 57-22179 Japanese Utility Model Publication No. 61-4378

  In recent years, with the progress of miniaturization of electronic devices, the mounting space of the jack has been reduced due to the multi-functionalization, and multi-polarization has been demanded. However, in the jack shown in FIGS. 6 and 7, the ground terminal 118 is used to connect the metal cap 113 at the front end of the jack (end on the plug insertion side) to the grounding land portion of the board at the rear end of the jack. For electrical connection, a ground terminal 118 is arranged on one side of the jack main body 110 from the front end to the rear end, so that it is difficult to add a movable terminal for signals, hindering the multipolarization and miniaturization of the jack. It has become.

  An object of the present invention is to provide a jack capable of reliably implementing an ESD countermeasure so as not to hinder multipolarization and miniaturization.

  The jack of the present invention that achieves the above object is characterized in that a plug insertion sleeve protrudes from an end wall on the plug insertion side of the jack body along the plug insertion / extraction direction on the insulating jack body, and the plug insertion sleeve is formed. In the jack provided with a conductive cap that covers and a ground terminal that electrically connects the cap to the board, the ground terminal is connected to the end of the jack body on the plug insertion side in the vicinity of the end of the plug insertion direction. A fixing portion having a soldering portion with respect to the substrate extending from the end of the fixing portion on the back side in the plug insertion direction, and the cap connected to the end portion on the near side of the fixing portion in the plug insertion direction. A contact portion with respect to the inner surface is integrally provided, the jack main body is opened in two directions on the board side and the plug insertion sleeve side, and the fixing portion for the ground terminal is used as the jack book. An earth terminal mounting groove to be inserted from the surface facing the substrate in the vicinity of the end wall on the plug insertion side of the plug and an outer surface of the plug insertion sleeve for inserting the fixing portion of the ground terminal into the earth terminal mounting groove Accordingly, a notch portion into which the contact portion of the ground terminal can be fitted is provided, and the cap is connected to the board in the vicinity of the end wall on the plug insertion side of the jack body through the ground terminal.

  In the present invention, the contact portion of the ground terminal forms the fixing portion in a flat plate shape, and a notch is provided in parallel with the edge on the near side of the plug insertion direction from the side edge on the substrate side of the fixing portion. It is a cantilever-shaped spring contact piece that has elasticity by curving the fixing portion on the front side of the plug insertion direction from the notch, and the notch portion on the outer surface of the plug insertion sleeve is the contact portion of the ground terminal. It is preferable to have a depth greater than the thickness.

  According to the jack of the present invention, since the cap is connected to the board in the vicinity of the end wall on the plug insertion side of the jack body through the ground terminal, the ESD countermeasure can be reliably implemented using a smaller ground terminal as compared with the conventional case. . For this reason, it is easy to realize multi-pole and miniaturization of the jack.

  In addition, by providing elasticity to the contact portion of the ground terminal that is in contact with the inner surface of the cap, the dimensions of the parts and assembly errors are absorbed by the elasticity of the contact portion of the ground terminal, and the contact portion of the ground terminal is connected to the inner surface of the cap. Can be reliably held in contact with each other. For this reason, it is possible to implement more reliable ESD countermeasures than in the past.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. FIG. 1 is an external perspective view showing a mounting state of a cap and a ground terminal in a jack according to an embodiment of the present invention, FIG. 2 is a sectional view of a plug insertion sleeve portion in the jack of FIG. 1, and FIG. It is a disassembled perspective view which shows the attachment method of the cap and earthing | grounding terminal. In the following description, the arrow ab direction in FIG. 1 is the front-rear direction as the plug insertion / removal direction, the arrow cd direction is the up-down direction, and the arrow ef direction is the left-right direction.

  1 to 3, reference numeral 1 denotes a substantially rectangular parallelepiped jack body 1 made of plastic and having insulating properties. The jack body 1 has an end wall on the plug insertion side (lower right of the paper in FIGS. 1 to 3) so that the spring-shaped contact piece that is a movable terminal for signals and the plug pin of the plug can be prevented from being twisted on the inner surface. It has a plug pin and a plug insertion hole of almost the same diameter that penetrates from the two front walls (front wall) to the rear end surface (back surface) on the opposite side, and jacks the spring-like contact piece and the soldering part extending from it. Projected downward from the bottom surface of the main body 1 (bottom surface: the surface facing the printed wiring board on which the jack is mounted), and the contact portion of the spring-like contact piece was brought into contact with the corresponding plug in the plug insertion hole. It is held in a state and constitutes a jack with the number of poles corresponding to the plug. For example, when a four-pole jack corresponding to a four-pole plug is configured, four types of spring-like contact pieces including a tip spring, a ring spring, and two sleeve springs are held by the jack body 1 as described above.

  In the present embodiment, as an ESD (electrostatic discharge) countermeasure, a cylindrical plug insertion sleeve 3 is formed so as to protrude from the front wall 2 of the jack body 1 as described above along the plug insertion / removal direction (a-b direction). In addition, a cap 4 with a metal and covering the outer surface (outer peripheral surface and tip surface) of the plug insertion sleeve (hereinafter referred to as “plastic sleeve”) 3 and having an insulating property, and this cap (hereinafter referred to as “metal cap”). The ground terminal 5 is provided to electrically connect 4 to the ground land portion of the substrate.

  The plastic sleeve 3 is formed coaxially with the plug insertion hole of the jack body 1 and has substantially the same inner diameter as the plug insertion hole of the plastic sleeve 3 so that the plug can be inserted into the plug insertion hole of the jack body 1 through the plastic sleeve 3. It is like that.

  The metal cap 4 is, for example, formed by cutting a free-cutting brass rod or the like and plated with nickel. The cylindrical cap 6 is fitted to the outer peripheral surface of the plastic sleeve 3 and covers it. The body portion 6 is integrally provided with an edge portion 7 that protrudes inward from the front edge of the body portion 6 at a right angle and covers the front end surface of the plastic sleeve 3.

  The ground terminal 5 is formed by press-working (such as punching and bending) a highly conductive metal plate that is a hoop material, and is subjected to gold plating, etc., which is perpendicular to the substrate and is inserted and removed from the plug. A rectangular flat plate-shaped fixing portion 8 having a depth in the direction, a soldering portion 9 extending downward from a rear end portion on the back side of the fixing portion 8 in the plug insertion direction, and a plug insertion of the fixing portion 8 The contact part 10 with respect to the inner surface of the trunk | drum 6 of the metal cap 4 continuously provided in the front end part of the direction near side is provided integrally.

  The depth dimension of the fixing portion 8 is sufficiently smaller than half of the depth dimension (length in the front-rear direction) of the jack body 1. The depth dimension (width dimension) of the contact portion 10 is slightly smaller than the axial length of the plastic sleeve 3.

  Further, the contact portion 10 is formed by a part of the fixing portion 8, and is cut in parallel with a front edge which is an end edge on the near side of the plug insertion direction from a lower edge which is an end edge on the substrate side of the fixing portion 8. And a spring contact piece in the form of a cantilever that is elastic by curving the front end portion in front of the notch 11 of the fixed portion 8 in an arc shape. The contact portion 10 is connected to the fixing portion 8 in a flush manner via a connecting portion 12 whose upper portion is flush with the fixing portion 8, and is curved in an arc shape inside only at the lower portion. Is formed. The bending radius at the bottom of the contact portion 10 is slightly larger than the outer peripheral radius of the plastic sleeve 3. A contact 13 having a shape of a part of a sphere in which the apex is brought into contact with the inner surface of the body portion 6 of the metal cap 4 is bulged and formed on the outer surface of the tip portion of the contact portion 10.

  On the other hand, the jack main body 1 is formed within the thickness (in the illustrated case, within the thickness of the right side wall) at the front end of one of the left and right side walls, and is open to the outside on the lower surface and front surface of the jack main body 1. That is, it opens in two directions, ie, the lower side which is the substrate side and the front side which is the plastic sleeve 3 side, and the fixing portion 8 of the ground terminal 5 is inserted from the lower surface of the jack body 1 near the front wall 2 of the jack body 1 (press-fit) ) Formed on the outer peripheral surface which is the outer surface of the plastic sleeve 102, and the contact portion 10 which can be fitted into the contact portion 10 from below when the fixing portion 8 is press-fitted into the ground terminal mounting groove 14. A notch portion 15 having substantially the same "" shape is provided.

  The ground terminal mounting groove 14 and the upper part of the notch 15 are on a plane perpendicular to the substrate, and the lower part of the notch 15 is on the circumference centering on the axis of the plastic sleeve 3.

  The notch 15 is a displacement of the contact portion 10 of the ground terminal 5 disposed between the outer peripheral surface of the plastic sleeve 3 and the inner surface of the body portion 6 of the metal cap 4 when the outer surface of the plastic sleeve 3 is covered with the metal cap 4. It has a depth larger than the thickness of the contact portion 10 of the ground terminal 5 so as to form the space 16.

  When the metal cap 4 and the ground terminal 5 are attached to the jack in the above configuration, the upper end of the fixing portion 8 of the ground terminal 5 is connected to one of the ground terminal mounting grooves 14 on the lower surface of the jack body 1 as shown in FIG. The fixing portion 8 of the ground terminal 5 is press-fitted into the ground terminal mounting groove 14 from the lower surface of the jack body 1 so as to face the opening 17.

  As a result, as shown in FIGS. 1 and 2, the soldered portion 9 of the ground terminal 5 protrudes downward from the lower surface of the jack body 1 in the vicinity of the front wall 2 of the jack body 1, and the connecting portion 12 of the ground terminal 5 is provided. Is protruded forward from the upper part of the other opening 18 of the ground terminal mounting groove 14 on the front surface of the jack body 1, and the upper part of the contact part 10 of the ground terminal 5 is fitted into the upper part of the notch part 15 on the outer peripheral surface of the plastic sleeve 3. The ground terminal 5 is attached to the jack body 1 with the lower portion of the contact portion 10 of the ground terminal 5 facing the notch 15.

  At this time, the fixing portion 8 of the ground terminal 5 has a flat plate shape, and the contact portion 10 of the ground terminal 5 is formed in a substantially “No” shape as a whole as described above. It can be easily attached to the jack body 1 simply by pushing in the direction perpendicular to the lower surface of the body 1. Further, since the contact portion 10 of the ground terminal 5 can be attached to the notch 15 on the outer peripheral surface of the plastic sleeve 3 without passing through the closed space (hole), the contact portion 10 of the ground terminal 5 is attached to the jack body 1 at the time of attachment. There is no risk of buckling deformation of the contact portion 10 of the ground terminal 5 by being caught on the side.

  Since the contact portion 10 is in a free state when the ground terminal 5 is mounted, the lower portion of the contact portion 10 faces the cutout portion 15 in a state where it largely floats from the cutout portion 15 as it goes to the distal end side. .

  After the ground terminal 5 is attached, as shown in FIG. 3, the rear end portion of the body portion 6 of the metal cap 4 is opposed to the front surface of the jack body 1, and the lower portion of the contact portion 10 of the ground terminal 5 is pushed to the notch portion 15. The body portion 6 of the metal cap 4 is fitted to the outer peripheral surface of the plastic sleeve 3 from the front of the jack body 1 in the inserted state.

  As a result, as shown in FIGS. 1 and 2, the outer peripheral surface of the plastic sleeve 3 is covered with the body portion 6 of the metal cap 4, and the front end surface of the plastic sleeve 3 is covered with the edge portion 7 of the metal cap 4. The outer surface of the plastic sleeve 3 is covered with a metal cap 4.

  The contact portion 10 of the ground terminal 5 is accommodated in a displacement space 15 formed through a notch 15 between the outer peripheral surface of the plastic sleeve 3 and the inner surface of the body portion 6 of the metal cap 4. Due to the elasticity of the contact portion 10, the apex of the contact 13 is pressed against and held in contact with the inner surface of the body portion 6 of the metal cap 4, and the metal cap 4 and the ground terminal 5 are electrically connected.

  The metal cap 4 may be simply fixed by press-fitting to the outer surface of the plastic sleeve 3, but in order to fix the metal cap 4 more securely, several portions are caulked to the body portion 6 of the metal cap 4. It is preferable to provide a retaining recess having an inner surface convex and an outer surface concave.

  In addition to the spring-like contact piece that is the signal movable terminal, the jack as a product to which the metal cap 4 and the ground terminal 5 are attached as described above is soldered to the spring-like contact piece protruding from the lower surface of the jack body 1. The soldering part 9 of the attaching part and the grounding terminal 5 is inserted into the through hole of the board, soldered by reflow and fixed and connected (insertion mounting), whereby the metal cap 4 at the front end of the jack is grounded. The terminal 5 is electrically connected to the grounding land portion of the board in the vicinity of the front wall 2 of the jack body 1.

  Further, the jack as a product assembled in the electronic device is such that the tip of the plastic sleeve 3 covered with the metal cap 4 is exposed to the outside from the opening of the housing of the electronic device, and the jack body 1 is passed through the plastic sleeve 3. The plug can be inserted into the plug insertion hole. When inserting a plug, for example, when ESD (electrostatic discharge) is generated from the fingertip of a person, an ESD surge is quickly drawn through the metal cap 4 and the ground terminal 5. , It flows to the ground wiring. As a result, the ESD surge does not flow in the internal circuit and no high voltage is applied. For this reason, electronic components including semiconductor devices such as LSIs and ICs are not broken, and electrostatic breakdown is prevented (ESD countermeasures).

  Further, since the tip of the plastic sleeve 3 exposed to the outside from the inside of the opening of the electronic device is covered with the metal cap 4 (shield), it radiates from the inside of the electronic device or enters the inside. Noise can be suppressed.

  As described above, the jack according to the present embodiment connects the metal cap 4 to the board in the vicinity of the front wall 2 of the jack body 1 through the ground terminal 5, so that ESD countermeasures can be reliably achieved using a smaller ground terminal 5 than the conventional one. Can be implemented. For this reason, a spring-like contact piece, which is a movable terminal for signals, can also be attached behind the ground terminal 5. For this reason, further multipolarization and miniaturization of a jack are easily realizable. In FIGS. 1 to 3, reference numerals 19 and 20 denote soldered portions of spring-like contact pieces, which are signal movable terminals mounted behind the ground terminal 5.

  In addition, since the contact portion 10 of the ground terminal 5 to be brought into contact with the inner surface of the body portion 6 of the metal cap 4 is made elastic, the dimensions of the jack body 1, the metal cap 4, the ground terminal 5, etc., and assembly errors can be reduced. Therefore, the contact portion 10 of the ground terminal 5 can be reliably held in contact with the inner surface of the body portion 6 of the metal cap 4. For this reason, it is possible to implement more reliable ESD countermeasures than in the past.

  By the way, since the jack of this embodiment has a space inside the plastic sleeve 3, it can be installed as long as it is a ring-like spring-like contact piece, and can be electrically connected to a plug and used as a movable terminal for signals. . In FIG. 1 to FIG. 3, reference numeral 21 denotes a signal movable terminal installed inside the plastic sleeve 3.

  This movable terminal 21 is either one of the upper surface and the left and right side surfaces of the jack body 1 (the illustrated one is the left side surface: because the fixing portion 8 of the ground terminal 5 is within the thickness of the right side wall). From the L-shaped support piece portion 22 along the surface, the soldering portion 23 formed on the support piece portion 22 extending downward from the rear end of the vertical piece portion, and the right end of the horizontal portion of the support piece portion 22. A pair of narrow continuous piece portions 24 projecting flush with the front, and a pair extending downward from both side edges of the continuous portion 23 to make the cross-sectional shape of the continuous portion 23 open downward. And a pair of spring contact pieces 28 extending in a concentric arc shape from the pair of continuous side pieces 25 and 26 to form a split ring-shaped spring-like contact piece 27. , 29 are provided integrally.

  Also, of the pair of spring contact piece portions 28 and 29, one spring contact piece portion 28 extending from the left side connection side piece portion 25 has an arc shape slightly smaller than 90 degrees, and the right side connection side piece portion The other spring contact piece 29 extending from 26 has an arc shape slightly smaller than 270 degrees, and the left half of the spring contact piece 27 is split on a horizontal plane passing through the center of the spring contact piece 27 (a pair of The gaps 30 between the spring contact pieces 28 and 29 are formed, and the biting prevention pieces 31 and 32 facing the front ends of the pair of spring contact pieces 28 and 29 with the split 30 therebetween are bent. Forming. Contacts 33 and 34 having a shape of a part of a sphere for contacting the apex to the plug are bulged and formed on the inner surfaces of the distal ends of the pair of spring contact pieces 28 and 29.

  On the other hand, a support piece mounting groove 35 for mounting the support piece 22 of the movable terminal 21 is formed in the front left corner of the upper surface of the jack body 1 and the front end of the left surface. On the inner peripheral surface of the plastic sleeve 3, a continuous portion 23 of the movable terminal 21, a pair of continuous side pieces 25 and 26, a pair of spring contact pieces 28 and 29, and a pair of spring contact pieces 28 and 29 are provided. A spring-like contact piece mounting groove 36 is formed so as to be displaceable. A portion of the spring-like contact piece mounting groove 36 to which the connecting portion 23 is attached is a support piece mounting groove on the upper surface of the jack body 1. It is connected to the right end of 35. An island-shaped piece 37 formed by leaving the plastic of the plastic sleeve 3 in an island shape inside the portion where the continuous portion 23 and the pair of continuous-side piece portions 25 and 26 are mounted in the spring-shaped contact piece mounting groove 36. There is. A portion corresponding to the tip of the pair of spring contact pieces 28 and 29 in the spring-shaped contact piece mounting groove 36 is further provided with a pair of biting prevention pieces 31 and 32, respectively. A biting prevention piece portion mounting groove 38 for mounting the pair of biting prevention piece portions 31 and 32 collectively is formed so as to be displaceable in conjunction with the displacement of 29. The upper and lower central portions of the front surface of the biting prevention piece portion mounting groove 38 penetrate the tip end surface of the plastic sleeve 3 through the biting prevention piece portion introduction groove 39. A notch 40 is provided on the upper left side of the plastic sleeve 3, and a support piece mounting groove on the upper surface of the jack body 1 is formed by the notch 40 and a portion where the connecting portion 23 is mounted in the spring-like contact piece mounting groove 36. 35 from the left end to the right end of the plastic sleeve 3, and the left half of the portion where the connecting portion 23 is mounted in the spring-like contact piece mounting groove 36 by the notch 40 is exposed to the outside of the plastic sleeve 3. The inner side and the outer side of the plastic sleeve 3 are connected to each other at the portion of the spring-like contact piece mounting groove 36 where the left side connecting portion 25 is mounted.

  When the movable terminal 21 is attached to the jack, it is attached before the metal cap 4, and the movable terminal 21 is arranged so that the rear end of the support piece 22 of the movable terminal 21 faces the jack body 1 as shown in FIG. 3. Is supported on the front side of the jack body 1, the horizontal piece of the support piece 22 of the movable terminal 21 is on the upper surface of the jack body 1 through the upper part of the spring-like contact piece mounting groove 36 of the plastic sleeve 3 and the notch 40. While inserting into the support piece mounting groove 35, the vertical piece of the support piece 22 of the movable terminal 21 is inserted into the support piece mounting groove 35 on the left side surface of the jack body 1, and the support piece 22 of the movable terminal 21 is inserted. Is inserted into the support piece mounting groove 35 of the jack body 1 from the front and mounted, so that the soldered portion 23 of the movable terminal 21 protrudes downward from the lower surface of the jack body 1. As shown in FIGS. 1 and 2, the spring-like contact piece mounting groove 36 inside the plastic sleeve 3 has a continuous portion 23 of the movable terminal 21, a pair of continuous side portions 25 and 26, and a pair of spring contact pieces. The portions 28 and 29 are inserted and mounted from the front, and the pair of biting prevention piece portions 31 and 32 of the movable terminal 21 are inserted into the biting prevention piece portion mounting groove 38 inside the plastic sleeve 3. It is inserted and mounted from the front through the introduction groove 39.

  In combination with the ESD countermeasure as described above, by using the signal movable terminal 21 in which the spring-like contact piece 27 is installed in the inner space of the plastic sleeve 3 as described above, the jack can be further multipolarized and miniaturized. It becomes easier to realize.

  In the present embodiment, the jack of the present invention has been described as an insertion mounting type jack. However, a surface mounting type jack may be used. The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

It is an external appearance perspective view which shows the attachment state of the cap and earthing | grounding terminal in the jack which concerns on one embodiment of this invention. It is sectional drawing of the plug insertion sleeve part in the jack of FIG. It is a disassembled perspective view which shows the attachment method of the cap and grounding terminal to the jack of FIG. It is a disassembled perspective view which shows the attachment method of the sleeve for plug insertion to the conventional jack, and a ground terminal. FIG. 5 is a cross-sectional view showing a state where the plug insertion sleeve and the ground terminal are attached to the jack of FIG. 4. It is an external appearance perspective view which shows the attachment state of the cap and grounding terminal in the other conventional jack. It is a disassembled perspective view which shows the attachment method of the cap and earthing | grounding terminal to the jack of FIG.

Explanation of symbols

1 Jack body 2 Front wall (end wall)
3 Plastic sleeve (Sleeve for plug insertion)
4 Metal cap (cap)
5 Grounding terminal 8 Fixing part 9 Soldering part 10 Contact part 11 Notch 14 Grounding terminal installation groove 15 Notch

Claims (2)

  A plug insertion sleeve projects from the end wall on the plug insertion side of the jack body along the plug insertion / removal direction on the insulating jack body, and a conductive cap that covers the plug insertion sleeve and the cap A jack provided with a ground terminal for electrical connection to a board, wherein the ground terminal has a fixed portion having an end on the back side in the plug insertion direction in the vicinity of an end wall on the plug insertion side of the jack body, and a plug of the fixed portion A soldering portion for the substrate extending from the end portion on the back side in the insertion direction and a contact portion for the inner surface of the cap connected to the end portion on the near side of the plug insertion direction of the fixing portion are integrally provided, The jack body opens in two directions, the board side and the plug insertion sleeve side, and the fixing portion of the ground terminal faces the board near the end wall on the plug insertion side of the jack body. A ground terminal mounting groove to be inserted from a surface to be inserted, and an outer surface of the plug insertion sleeve, and the ground terminal contact portion can be fitted with the ground terminal fixing portion being inserted into the ground terminal mounting groove. A jack provided with a notch, wherein the cap is connected to a board in the vicinity of an end wall on the plug insertion side of the jack body through the ground terminal.   The contact portion of the ground terminal is formed in a flat plate shape with the fixing portion, and a cut is provided in parallel with the edge on the near side of the plug insertion direction from the side edge on the substrate side of the fixing portion. It consists of a cantilever-like spring contact piece that is bent and elastic at the front side in the insertion direction, and the notch on the outer surface of the plug insertion sleeve has a depth larger than the thickness of the contact portion of the ground terminal. The jack according to claim 1 having a thickness.

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