JP2015185469A - Jack - Google Patents

Abstract

[PROBLEMS] To realize downsizing of an outer shape, reduction of a mounting area on a printed wiring board on which a jack is mounted, and reduction of cost required for processing a contact compared to a conventional jack. . A contact portion (3a) having a housing (21, 22) having a plug insertion hole (1a), formed of an elastic conductive metal plate, and elastically contacting the plug is provided in the plug insertion hole (1a). In the jack provided with a plurality of contacts held in the housing (21) in a state of projecting in the contact, the contact is formed in a flat plate shape without bending the plate surface of the conductive metal plate, and the contact portion (3a ) Is elastically displaced in the direction along the plate surface of the conductive metal plate, and the plug is elastically contacted by the fracture surface portion of the conductive metal plate. [Selection] Figure 5

Description

  The present invention relates to a jack.

  As a method for connecting an electronic device and a peripheral device corresponding to the electronic device, a connection method by inserting a plug included in the peripheral device into a jack included in the electronic device is widely used.

  Cited Document 1 discloses an example of such a conventional jack (see FIG. 10 of the present application). The single-headed jack 100 disclosed in the cited document 1 is configured such that the single-headed jack 100 and the single-headed plug 130 are inserted by inserting the single-headed plug 130 into a plug insertion portion provided in a housing 300 made of an insulating material. An electrical connection between them can be obtained. The single-head plug 130 has four poles and has four electrodes 140a, 140b, 140c, and 140d. The single-head jack 100 has a holding tongue piece 800 and three conductive terminals 400, and is held by the housing 300 so as to be in elastic contact with the four electrodes of the single-head plug 130, respectively.

  Each of the holding tongue piece 800 and the three conductive terminals 400 is three-dimensionally formed by punching a conductive metal plate and then bending the conductive metal plate punched into a flat shape. Each of the conductive terminals 400 is in elastic contact with the four electrodes of the single-head plug 130 by utilizing elastic deformation in the direction of bending the plate surface of the conductive metal plate.

JP2012-48826 (FIGS. 3 and 4)

  In recent years, among electronic devices equipped with a jack, in particular, portable electronic devices such as smartphones are increasingly required to be small and thin. In order to realize such a demand, it is required to reduce the outer shape of the jack and to reduce the mounting area on the printed wiring board on which the jack is mounted. On the other hand, there is a constant demand for cost reduction related to jacks.

  As described above, the conductive terminal 400 of the single-headed jack 100 disclosed in the cited document 1 is accompanied by elastic deformation in a direction in which the plate surface of the electric metal plate forming the conductive terminal 400 is bent. In this case, a space is secured over the width of the conductive terminal 400 (the length in the direction perpendicular to the paper surface in FIG. 10 of the present application) so that the conductive terminal 400 can be retracted when the single-head plug 130 is inserted. It is necessary to keep. This space for evacuation becomes a factor that hinders downsizing of the single-headed jack 100.

  Further, in the single-head jack 100 disclosed in the cited document 1, since the shape of the conductive terminal 400 is three-dimensional and complicated, all the conductive terminals are limited to a range on one side with respect to the axial direction of the single-head plug 130. 400 cannot be disposed, and the conductive terminals 400 must be disposed on both sides with respect to the axial direction of the single-head plug 130, which is a factor that hinders downsizing.

  Further, as shown in FIG. 3 of the cited document 1, as a terminal for mounting the single-headed jack 100 on the printed wiring board, the mounting connected to the conductive terminal 400 on the bottom surface of the single-headed jack 100. The service terminal is provided so as to protrude outward in the width direction of the housing 300. In view of the need to provide lands for soldering the mounting terminals on the printed wiring board, in the mounting surface on which the single-head jack 100 is mounted, the area where the single-head jack 100 faces the mounting surface A considerably larger mounting area is required. Therefore, increasing the arrangement density of the components inside the electronic device is hindered, which becomes a factor that hinders downsizing the electronic device.

  In addition, as described above, the conductive terminal 400 of the single-headed jack 100 disclosed in the cited document 1 is formed through the punching process and the bending process on the conductive metal plate, so that the bending process is performed. Therefore, the cost required for processing for obtaining the conductive terminal 400 is high.

  The present invention has been made in view of the above problems, and is intended to reduce the outer shape of the conventional jack and reduce the mounting area on the printed wiring board on which the jack is mounted. Furthermore, it aims at reducing the cost which concerns on a jack in connection with reducing the cost required for the process of an electroconductive terminal. Hereinafter, the conductive terminal may be referred to as “contact”.

  In order to solve the above-described problems, a jack according to the present invention includes a housing having a plug insertion hole and a conductive metal plate having elasticity, and a contact portion that elastically contacts a plug inserted into the plug insertion hole. And a plurality of contacts held by the housing in a state of protruding into the plug insertion hole, and at least one of the plurality of contacts bends the plate surface of the conductive metal plate. It is formed in a flat plate shape without processing, and the contact portion is elastically displaced in a direction along the plate surface of the conductive metal plate, and elastically contacts the plug at the fracture surface portion of the conductive metal plate. .

  According to the present invention, the contact is not three-dimensional like the conventional one by forming the contact only by punching without performing the bending process on the plate surface of the conductive metal plate as the material. Instead, it is formed in a flat plate shape along a single plane. Then, the contact portion is elastically displaced in the direction along the plate surface of the conductive metal plate by forming the width of the portion connected to the contact portion (width in the direction along the above-mentioned plane) to an appropriate width. Since it is formed so as to be elastically contacted with the plug at the fracture surface portion of the conductive metal plate, a function required as a contact is realized in the same manner as the conventional one. Nevertheless, the cost required for contact processing is greatly reduced, such as eliminating the need for the conventional bending process, which eliminates the need for a mold required for the bending process.

  Further, since the contact is formed in a flat plate shape in this way, the space for retraction required for the housing to cope with the elastic displacement of the contact portion caused by the insertion of the plug is provided by the conductive metal plate. It is enough if there is enough width for the plate thickness. Compared to the case of the conventional contact with the elastic deformation in the direction of bending the plate surface of the electric metal plate as described above, the volume of the space for retraction is greatly reduced, so that the housing can be downsized. As a result, the outer shape of the jack can be reduced.

  The jack according to the present invention further includes a connection terminal for connecting at least one contact to the printed wiring board, and the connection terminal is arranged in a state where the housing does not protrude from a range facing the mounting surface of the printed wiring board. In the connection terminal portion, the conductive metal plate may be connected to the printed wiring board in a state where the broken cross-section portion faces the mounting surface of the printed wiring board.

  According to the present invention, since the connection terminal in at least one contact does not protrude from the housing, at least the connection terminal portion is located on the mounting surface of the printed wiring board on which the jack is mounted, and the housing faces the mounting surface. The land that needs to be provided beyond the range is eliminated, or is significantly smaller than the case where the connection terminal is provided by protruding from the housing as in the prior art. This contributes to increasing the arrangement density of various electronic components including the jack inside the electronic device, and the electronic device can be reduced in size.

  In the jack according to the present invention, the at least one contact may further include a displacement restricting portion for preventing the contact portion from being excessively elastically displaced.

  According to the present invention, even when a thin object is inserted and the contact portion of the contact is excessively pushed, the displacement amount of the contact portion is restricted by the displacement restricting portion. As a result, it is possible to prevent the contact portion from being excessively displaced and plastically deformed, and even if the plug is inserted, the contact portion cannot be brought into contact with the plug, that is, permanent destruction of the jack occurs. Can be avoided.

  The jack according to the present invention is formed of a housing having a plug insertion hole and an elastic conductive metal plate, and a contact portion that elastically contacts the plug inserted into the plug insertion hole is projected into the plug insertion hole. A plurality of contacts that are held in the housing in a state where all of the plurality of contacts are formed in a flat plate shape that does not involve bending the plate surface of the conductive metal plate. The contact portion is elastically displaced in the direction along the plate surface of the conductive metal plate, and is elastically contacted with the plug at the fracture surface portion of the conductive metal plate, and all the contacts are held in parallel by the housing. It may be a thing.

  According to the present invention, by forming all the contacts of the jack in the flat plate shape as described above, the volume of the space for retraction when the contact portion is elastically displaced is reduced in all the contact portions. Therefore, the housing can be minimized, and as a result, the outer shape of the jack can be minimized. In addition, the cost required for contact processing can be minimized.

  In addition, since each contact is flat, a plurality of contacts can be arranged in parallel with each other. Therefore, all the contacts are arranged in a range on one side with respect to the axial direction of the plug to be inserted. be able to. For this reason, compared with the case where the conventional three-dimensional contact is arrange | positioned on both sides with respect to the axial direction of a plug, size reduction of a jack can be achieved.

  In the jack according to the present invention, all of the plurality of contacts further have a connection terminal for connection to the mounting surface of the printed wiring board, and the connection terminal is from a range where the housing faces the mounting surface of the printed wiring board. It may be arranged in a state where it does not protrude, and may be connected to the printed wiring board in a state where the broken surface portion of the conductive metal plate faces the mounting surface of the printed wiring board at the connection terminal portion.

  By making the connection terminals of all contacts of the jack not protrude from the range where the housing as described above faces the mounting surface of the printed wiring board, the mounting area of the jack can be minimized, and the electronic device It contributes to the miniaturization of the maximum.

  According to the present invention, the outer shape of the conventional jack is reduced, the mounting area on the printed wiring board on which the jack is mounted is reduced, and the cost required for processing the contact is reduced. As a result, it is possible to reduce the cost associated with the jack.

It is a figure which shows the external appearance of the jack which concerns on this invention. It is a figure which shows the structure of the jack which concerns on this invention. It is an exploded view of the principal part of the jack concerning the present invention. It is an external view of the contact of the jack which concerns on this invention. It is sectional drawing of the jack along the contact shown in FIG. It is an external view of another contact of the jack which concerns on this invention. It is an external view of another contact of the jack according to the present invention. It is an external view of another contact of the jack according to the present invention. It is a figure which shows the aspect by which the jack concerning this invention is mounted, Comprising: (a) is the back side perspective view of the jack concerning this invention, (b) showed the jack concerning this invention with the printed wiring board. FIG. It is a figure which shows the conventional jack.

   A jack 1 according to an embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a perspective view showing an appearance of a jack 1 according to the present invention. The jack 1 is a so-called four-pole jack whose outer shape has a substantially rectangular parallelepiped shape. The outer shape of the jack 1 is formed by a housing 2 formed of an insulating resin having heat resistance that can withstand mounting by a reflow method or the like. The housing 2 has a circular opening for inserting a suitable plug on the front side in the figure. Inside, there is provided a plug insertion hole 1a having a substantially cylindrical shape, which is provided continuously from the opening and accommodates a plug (not shown) inserted into the jack 1.

  FIG. 2 is an exploded view showing the structure of the jack 1. The housing 2 of the jack 1 is formed by combining the inner housing 21 that forms the lower inner wall of the plug insertion hole 1a by sliding it in the direction shown in the figure toward the inside of the outer housing 22 that forms the outer shape of the jack. ing. The inner housing 21 has a first contact 3, a second contact 4, a third contact 5, two second contacts 6, and a total of five contacts in parallel with each other on one side (lower side) with respect to the axial direction of the plug. Side).

  When assembling the jack 1, first, each contact is held by the inner housing 21, and then the inner housing 21 is slid into the inside of the outer housing 22. Such a configuration is advantageous in making the jack 1 easy to assemble and providing a waterproof structure that prevents water droplets or the like from entering the electronic device from the plug insertion hole 1a. However, in implementing the present invention, it is not essential to make the housing in this way a two-piece structure.

  FIG. 3 is an exploded view of the inner housing 21 portion. The first contact 3, the second contact 4, and the third contact 5 are provided from the lower side of the inner housing 21, and the two fourth contacts 6 are provided from the upper side of the inner housing 21 to the inner housing 21 corresponding to the respective contacts. It is press-fitted into the provided groove and held.

  4 is an external view of the first contact 3, and FIG. 5 is a longitudinal sectional view of the jack 1 at the first contact 3 portion. The first contact 3 is formed into an elongated shape by forming a flat plate along a single plane by punching a conductive metal plate material having moderate elasticity by press working.

  One end of the first contact 3 is provided with a contact portion 3a formed in a circular shape toward the plug inserted into the plug insertion hole 1a. It is preferable that the contact portion 3a has a circular shape as in the present embodiment because it is possible to avoid inconveniences such as the contact portion 3a being caught by the plug when the plug is inserted or removed. However, the shape of the contact portion 3a is not particularly limited to a circular shape, and may be any other shape.

  A press-fit portion 3b is provided at the center of the first contact 3 so as to protrude in a rectangular shape toward the upper side. The entire width (the length along the plate surface direction) of the press-fit portion 3b is formed slightly wider than the width of the groove portion 21a (see FIG. 5) provided in the inner housing 21, and the press-fit portion 3b is formed in the groove portion 21a. The first contact 3 is fixed to the inner housing 21 by pressing firmly until the portion corresponding to the top of the contact portion 3a protrudes into the plug insertion hole 1a with a predetermined dimension. It is held in that state.

  Between the press-fit portion 3b and the contact portion 3a, an elastic arm portion 3c formed in a narrow width is provided. The elastic arm portion 3c is formed so as to be elastically deformed in a direction along the plate surface with an appropriate elastic force. Accordingly, the contact portion 3a is elastic in a direction along the plate surface, that is, in the vertical direction shown in the drawing. It can be displaced.

  When a plug is inserted into the plug insertion hole 1a, the fracture surface portion of the conductive metal plate located at the top of the contact portion 3a makes elastic contact with an appropriate pressing force against the corresponding electrode of the plug. In addition to the fracture surface, the fracture surface portion refers to a portion including a corner from the fracture surface to the plate surface of the conductive metal plate. Since the plug to be inserted is cylindrical, when the contact is disposed at a position offset with respect to the central axis of the plug, it does not necessarily contact the plug at the fracture surface of the contact portion 3a. It is possible to come into contact with the corners leading to the plate surface 3a. The concept of the present invention also includes an aspect in which the contact portion 3a contacts the plug by the corner portion.

  Between the inner housing 21 and the outer housing 22, a retreat space 23, which is a space provided with a width slightly wider than the plate thickness of the first contact 3, is provided. When the plug is inserted into the plug insertion hole 1a, the contact portion 3a and the elastic arm portion 3c can be displaced in the retreat space 23, so that the elastic displacement in a necessary range is not hindered.

  In the contact portion 3a, a displacement restricting portion 3d that protrudes in a rectangular shape toward the side opposite to the contact portion 3a is provided. The displacement restricting portion 3 d is opposed to the inner wall surface of the outer housing 22 at its fracture surface. For example, when the contact portion 3a is intentionally pushed downward using a thin rod-like body, a force is applied to elastically displace the contact portion 3a beyond a predetermined elastic displacement range. In this case, the displacement restricting portion 3d abuts against the inner wall surface of the outer housing 22, thereby preventing the contact portion 3a from being excessively elastically displaced. This prevents the elastic arm portion 3c from being plastically deformed, so that it is possible to avoid a contact failure of the jack 1 and permanent destruction.

  At the end of the first contact 3 opposite to the side on which the contact portion 3a is provided, a connection terminal 3e is provided that protrudes in a rectangular shape downward. The projecting dimension of the connection terminal 3 e is set such that the tip of the connection terminal 3 e slightly projects outward from the outer housing 22. The connecting terminal 3e has a broken surface facing the mounting surface of the printed wiring board on which the jack 1 is mounted. When the jack 1 is mounted, the connection terminal 3e is soldered to a mounting land provided on the mounting surface of the printed wiring board, the jack 1 is pressed and fixed with an appropriate pressing force, or an anisotropic conductive thin film is attached. An electrical connection may be obtained by an arbitrary method such as fixing via a cable.

  As described above, the first contact 3 includes the contact portion 3a, the press-fit portion 3b, the elastic arm portion 3c, the displacement restricting portion 3d, and the connection terminal 3e by performing only the punching process on the conductive metal plate material. Compared to a three-dimensional contact formed by bending a conventional plate surface, it has the same function required for a contact but does not require a bending process. Thus, the cost for processing can be greatly reduced. Further, as described above, the width of the evacuation space 23 only needs to be about the thickness of the first contact 3, and the volume of the evacuation space 23 is greatly reduced as compared with the conventional one. 1 can be miniaturized.

  FIG. 6 is an external view of the second contact 4. Similarly to the case of the first contact 3, the second contact 4 is also formed in a flat plate shape with a contact portion 4a, a press-fit portion 4b, an elastic arm portion 4c, a displacement restricting portion 4d, and a connection terminal 4e. The configuration and operational effects of these parts are the same as in the case of the first contact 3 and will not be described in detail.

  FIG. 7 is an external view of the third contact 5. Similarly to the case of the first contact 3, the third contact 5 includes a contact portion 5a, a first press-fit portion 5b, a second press-fit portion 5c, an elastic arm portion 5d, a displacement restricting portion 5e, and a connection terminal 5f. In particular, the configurations of the first press-fit portion 5b, the second press-fit portion 5c, the elastic arm portion 5d, and the displacement restricting portion 5e are different from those of the first contact 3.

  The electrode of the plug corresponding to the third contact 5 is located on the far side of the plug insertion hole 1 a as compared with the position of the electrode corresponding to the first contact 3 or the second contact 4. In order to correspond to this positional relationship, in the third contact 5, the contact portion 5 a is located substantially at the center of the third contact 5. A first press-fit portion 5b is provided at a tip portion corresponding to a portion where the contact portion 3a is provided in the first contact 3. Between the contact portion 5a and the first press-fit portion 5b, there is provided an elastic arm portion 5c having a narrow width, and the contact portion 5a extends along the plate surface direction with the first press-fit portion 5b side as a fulcrum. Thus, it can be elastically displaced in the illustrated vertical direction.

  A second press-fit portion 5 c is provided at the center of the third contact 5 so as to protrude upward. The third contact 5 is held in the inner housing 21 by the first press-fit portion 5b and the second press-fit portion 5c.

  The displacement regulating portion 5e of the third contact 5 is formed by inclining a part of the second press-fit portion 5c toward the first press-fit portion 5b. When a force is applied to the contact portion 5a of the third contact 5 to elastically displace the contact portion 5a beyond the predetermined elastic displacement range, the fracture surface located below the contact portion 5a is: The contact part 5a is prevented from being excessively displaced by contacting the fractured surface of the inclined notch of the displacement restricting part 5e. In the case of the first contact 3, the displacement restricting portion 5 e of the third contact 5 is provided not on the side of the contact portion 5 a that is a movable portion but on the side of the second press-fit portion 5 c that is a fixed portion. However, in both cases, both are included in the concept of the “displacement restricting portion” in the present invention because they are common in terms of preventing excessive displacement of the contact portions 3a and 5a.

  FIG. 8 is an external view of the fourth contact 6. Similarly to the other contacts, the fourth contact 6 is also formed in a flat plate shape including a contact portion 6a, a press-fit portion 6b, an elastic arm portion 6c, a displacement restricting portion 6d, and a connection terminal 6e. In addition, the displacement restricting portion 6d has a configuration close to the third contact 5 in that it is provided at a fixed portion of the fourth contact 6, but the configuration of the press-fit portion 6b is different from that of the third contact 5.

  The press-fit portion 6b of the fourth contact 6 is formed integrally with the connection terminal 6e so as to protrude in a rectangular shape toward the lower side of the fourth contact 6. This is because, as described above, the fourth contact 6 is press-fitted from the upper side of the inner housing 21, so that such a configuration is preferable. In addition, the dimension of this protrusion part is set to such an extent that the front-end | tip of the connection terminal 6e protrudes slightly toward the outer side from the outer housing 22. FIG. The elastic arm portion 6c is formed so as to be folded in a U shape from the portion of the displacement restricting portion 6d, and all of the narrow U-shaped portion reaching the contact portion 6a is formed to be elastically deformable.

  The jack 1 includes two fourth contacts 6 having the same shape, and the two fourth contacts 6 elastically contact the electrode located on the most distal end side of the plug to obtain electrical conduction. In addition to this, it also serves to hold the plug firmly so that the plug does not come off.

  9A and 9B are external views for illustrating a mounting mode of the jack 1. FIG. 9A is a perspective view including the bottom surface of the jack 1 (a surface facing the printed wiring board), and FIG. FIG. 6 is a perspective view showing a state in which is mounted on the printed wiring board 7.

  In the part located on the back side of the plug insertion hole 1a on the bottom surface of the jack 1, the tips of the connection terminals 3e, 4e, 5f, 6e of the contacts protrude from the bottom surface of the inner housing 21 at the same height. In all of these connection terminals 3e, 4e, 5f, 6e, the outer housing 22 does not protrude from a range facing the mounting surface of the printed wiring board 7. Further, all of the connection terminals 3e, 4e, 5f, and 6e are arranged so that their fractured surfaces face the mounting surface of the printed wiring board 7.

  On the mounting surface of the printed wiring board 7, lands (not shown) are provided at positions corresponding to the connection terminals 3e, 4e, 5f, and 6e. Each land has a rectangular shape and is formed to be slightly larger than the rectangular shape at the tip of each fractured surface of the connection terminals 3e, 4e, 5f, 6e. The housing 22 is within the range facing the mounting surface of the printed wiring board 7. Considering that such lands need to be disposed, the jack 1 and the printed wiring board 7 are generally within the range of the printed wiring board 7 having a size as shown in FIG. 9B. It is possible to connect. The area required for such connection is significantly smaller than the case where the connection terminal is provided beyond the range where the housing faces the printed wiring board, as in the case of a conventional jack, This contributes to increasing the arrangement density of electronic components.

  The present invention can be used in a jack, and can be preferably used particularly in a jack that is required to be downsized.

DESCRIPTION OF SYMBOLS 1 Jack 1a Plug insertion hole 2 Housing 21 Inner housing 21a Groove part 22 Outer housing 23 Retraction space 3 1st contact 3a Contact part 3b Press-fit part 3c Elastic arm part 3d Displacement control part 3e Connection terminal 4 2nd contact 4a Contact part 4b Press-fit part 4c Elastic arm portion 4d Displacement restricting portion 4e Connection terminal 5 Third contact 5a Contact portion 5b First press-fit portion 5c Second press-fit portion 5d Elastic arm portion 5e Displacement restricting portion 5f Connection terminal 6 Fourth contact 6a Contact portion 6b Press-fit portion 6c Elastic arm portion 6d Displacement restricting portion 6e Connection terminal 7 Printed wiring board

Claims (5)

A housing with a plug insertion hole;
A plurality of contacts formed by an electrically conductive metal plate having elasticity and held in the housing in a state where a contact portion elastically contacting the plug inserted into the plug insertion hole is protruded into the plug insertion hole;
In the jack having
At least one contact among the plurality of contacts is formed in a flat plate shape without a process of bending the plate surface of the conductive metal plate,
The jack is characterized in that the contact portion elastically displaces in a direction along the plate surface of the conductive metal plate and elastically contacts the plug at a broken surface portion of the conductive metal plate. The at least one contact further has a connection terminal for connecting to a printed wiring board;
The connection terminal is disposed in a state in which the housing does not protrude from the range facing the mounting surface of the printed wiring board, and the printed wiring board in a state where the fracture surface of the conductive metal plate faces the mounting surface of the printed wiring board. The jack according to claim 1, wherein the jack is connected to a board. The jack according to claim 1 or 2, wherein the at least one contact further includes a displacement restricting portion for preventing the contact portion from being excessively elastically displaced. A housing with a plug insertion hole;
A plurality of contacts formed by an electrically conductive metal plate having elasticity and held in the housing in a state where a contact portion elastically contacting the plug inserted into the plug insertion hole is protruded into the plug insertion hole;
In the jack having
All of the plurality of contacts are formed in a flat plate shape without a process of bending the plate surface of the conductive metal plate,
The contact portion is elastically displaced in a direction along the plate surface of the conductive metal plate, and is elastically contacted with the plug at a fracture surface portion of the conductive metal plate,
A jack characterized in that all contacts are held in parallel in a housing. All of the plurality of contacts further have a connection terminal for connecting to the printed wiring board,
The connection terminal is disposed in a state in which the housing does not protrude from the range facing the mounting surface of the printed wiring board, and the printed wiring board in a state where the fracture surface of the conductive metal plate faces the mounting surface of the printed wiring board. The jack according to claim 4, wherein the jack is connected to a board.

Images