JP2016212950A - Contact, manufacturing method of contact and portable type communication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a contact which can make deformation, damage or the like of a protrusion unlikely to occur even if there is impact such as collision of a foreign substance on a side face of the protrusion, although the contact is a spring type with housing.SOLUTION: The contact comprises: a housing part including an opening that is opened forwards; the protrusion that protrudes forwards from the opening and can be retracted towards the inside of the housing; and a spring part which is provided within the housing and energizes the protrusion forwards. The contact is configured to electrically connect a connection object that is in contact with the protrusion, to a connected object. In the contact, an outer surface of the protrusion forms a face surrounding a line that extends forwards from the opening, the face is a slope that is spread from a front end of the protrusion to its bottom, and a rear end of the slope is made close to the bottom as further as possible.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a contact used for electrical connection between a connection target and a connection target, a method for manufacturing the contact, and a portable communication device using the contact.

  Various electric devices such as a mobile phone are provided with various parts necessary for ensuring the function of the device. Moreover, in order to electrically connect these parts (contact object and to-be-contacted object), a contact may be utilized. As a kind of contact, for example, a type in which a protruding part is provided so as to be retractable from the housing, and the protruding part is urged in the protruding direction by a spring in the housing (in this application, for convenience, referred to as “spring type with housing”) ).

  According to the spring-type contact with the housing, the connection object can be brought into contact with the protrusion while the object to be connected presses the protrusion, and an appropriate contact load is obtained by the elastic force of the spring. In addition, since the housing protects the spring, it is easy to make a contact with excellent safety.

  Examples of conventional spring-type contacts with a housing include those disclosed in Patent Literature 1 and Patent Literature 2. The one disclosed in Patent Document 1 (see FIG. 2 and the like) is formed by bending a series of conductive members (metal members) 1 and is formed from a box-shaped housing (side portion 20 and the like). The arc-shaped projecting portion 32 projects in a retractable manner. The projecting portion 32 serves as a projecting portion that comes into contact with the connection target, and its cross section has an arch shape that is convex upward.

  On the other hand, in the one disclosed in Patent Document 2 (see FIG. 4 and the like), a cylindrical contact member 8 serving as the protruding portion protrudes from the housing 7 so as to be retractable. In this contact with a housing, the housing 7, the spring portion 22 and the contact member 8 are formed as separate members, and there is an advantage that the contact member 8 can be made of a highly rigid material although the number of parts is large.

JP 2003-168510 A Japanese Patent Laid-Open No. 11-162592

  In the spring-type contact with the housing, the spring portion is protected by the housing, but the protruding portion protrudes from the housing and is exposed to the outside. For this reason, there is a risk that an object (for example, a part attached in the vicinity of the contact) may unintentionally collide with the protrusion in an electrical device manufacturing process (part mounting process) or in various other situations. high.

  When an object collides from the front of the protrusion, the protrusion can retreat into the housing and the impact can be absorbed. However, when an object collides from the side of the protrusion (direction perpendicular to the protrusion direction), Therefore, there is a concern about deformation or damage of the protrusion due to the impact at that time. In particular, the contact is often configured to be very small so as to be suitable for a small device such as a mobile phone, and high precision is required. Therefore, the above deformation and damage are serious problems.

Here, looking at the contact disclosed in Patent Document 1, when the object collides from the left side or the right side as viewed in FIG. 2A, the protrusion 32 shown in FIG. It is thought that the impact is weakened by acting to flow into the water.

  However, the left or right side of the protrusion 32 when viewed in FIG. 2B is a vertical surface and is configured not to move in the left-right direction, so that an object collides with the vertical surface. Since all of the impact is applied in the horizontal direction, the possibility that the protruding portion 32 is deformed becomes extremely high. This is especially true when the contacts are downsized to a few millimeters and the thickness of the conductive member is about 0.5 millimeters or less. Accordingly, in this type of contact formed by bending a series of conductive members, a contact having a new configuration that has high deformation resistance against an impact from any direction is desired.

  On the other hand, the contact in Patent Document 2 is provided with a cylindrical contact member 8 which is a separate member as shown in FIG. 4. However, since the cylindrical side surface is vertical, a deformation load with a large impact from the horizontal direction is provided. It becomes. Therefore, in order to keep the contact member 8 in a normal position without being deformed even by the impact, the thickness of the periphery of the upper opening of the housing 7 is at least thick and the holding portion height for holding the base side of the contact member 8 is high. It is necessary to form the housing 7 robustly, for example, by increasing the length, which leads to an increase in the size and cost of the contact. For this reason, the contact of the novel structure which can reduce the said deformation | transformation load concerning the contact member 8 substantially is anticipated.

  In view of the problems described above, the present invention is a spring type with a housing, and even if there is an impact such as a foreign object hitting the side surface of the protruding portion, it is possible to make it difficult to cause deformation or damage of the protruding portion. It is an object of the present invention to provide a contact, a method for manufacturing the contact, and a portable communication device using the contact.

(1) A contact according to the present invention is provided in a housing part provided with an opening part opened forward, a projecting part projecting forward from the opening part and retractable into the housing part, and provided in the housing part. And a spring part for urging the protrusion forward, and a contact for electrically connecting a connection object in contact with the protrusion to an object to be connected, the outer surface of the protrusion being the opening Forming a surface surrounding a line extending forward from the portion, the surface being an inclined surface extending from the tip of the protrusion toward the base, the rear end of the inclined surface being as close to the root as possible (First configuration).

  According to this configuration, even though the housing is a spring type, even if there is an impact such as a foreign object hitting the side surface of the protruding portion, it is possible to prevent the protruding portion from being deformed or damaged. Here, “front” means merely a convenient expression for concisely expressing the protruding direction of the protruding portion.

(2) More specifically, as the first configuration, the outer surface of the projecting portion has a side surface shape of the rotating body with the line as a central axis, and the side surface of the truncated cone and a part of the spherical surface in order from the root And the spherical surface may be in contact with the side surface of the truncated cone (second configuration) at the connected position. According to this configuration, the outer surface of the protruding portion can be formed in an ideal shape from the viewpoint of obtaining the effect according to the first configuration.

(3) More specifically, as the first or second configuration, the spring portion is a leaf spring portion having one end fixed to the housing portion, and the protruding portion is the other end side of the leaf spring portion. It is good also as a structure fixed to (3rd structure).

(4) More specifically, as the third configuration, the housing portion and the leaf spring portion are formed by bending a series of metal plate materials, and the protruding portion is a separate member from the series of metal plate materials. It is good also as a formed structure (4th structure). For example, if the leaf spring part is drawn to form a convex protrusion, residual stress at the time of machining may remain in the leaf spring part, and a predetermined elastic force may not be obtained. (If the projecting portion is formed of a separate plate material and fixed to the leaf spring portion), such a situation is eliminated.

(5) More specifically, as the fourth configuration, the housing member and the first member in which the leaf spring portion having the fitting hole facing the opening is formed by bending a series of metal plate materials. And a second member in which the protruding portion is formed from a plate-like portion by drawing a metal plate material, and the protruding portion is inserted into the fitting hole until the plate-like portion comes into contact with the leaf spring portion. It is good also as a structure (5th structure) by which the 2nd member was fixed to the 1st member in the state engage | inserted from back.

  According to this configuration, it is easy to accurately fix the second member to a predetermined position (position where the fitting hole is provided), and it is also possible to obtain strong fixing. In addition, a series of conductive plate materials are bent to form a housing and a leaf spring, and this type of contact has a protruding portion on the free end side of the leaf spring (bending type). Is easily realized. The second member may be a plate material having the same material thickness as the first member.

(6) More specifically, as the fifth configuration, the leaf spring portion is arranged in parallel with the front rectilinear portion where the fitting hole is formed and the rear side so as to be substantially U-shaped in the width direction. A configuration in which the side rectilinear portion includes a U-shaped portion connected at ends, and the distance between the front rectilinear portion and the rear rectilinear portion is larger than the longitudinal dimension of the second member (sixth configuration) ).

  According to this configuration, the leaf spring portion meandering so as to include the U-shaped portion is adopted, so that the working area can be widened as compared with, for example, a cantilever leaf spring. Furthermore, according to this structure, it becomes possible to perform easily the process of fitting and fixing the 2nd member in the insertion hole of the 1st member after formation of the 1st member.

(7) A manufacturing method according to the present invention is a method for manufacturing a contact according to the fifth or sixth configuration, wherein after the first member is formed by the bending process, the plate-like portion contacts the plate spring portion. The protruding portion is fitted into the fitting hole until it comes into contact, and the plate-like portion is welded and fixed to the leaf spring portion. According to this manufacturing method, since the second member is attached after the bending process for the first member is completed, a situation in which the protruding portion or the like of the second member is accidentally damaged during the bending process is avoided.

(8) A portable communication device according to the present invention includes a contact according to any one of the first to sixth configurations, a component that is the connection target, and a circuit that is the contact target, The outer surface of the housing portion is bonded and fixed to the circuit, and the components are arranged so as to push the tip of the protruding portion backward. According to this configuration, a portable communication device that enjoys the advantages of the contact according to the present invention is realized.

  According to the contact according to the present invention, even if it is a spring type with a housing, even if there is an impact such as a foreign object hitting the side surface of the protruding portion, it is possible to prevent the protruding portion from being deformed or damaged. . Therefore, the reliability of the contact with respect to the electrical contact performance is improved.

It is an external appearance perspective view of contact X concerning this embodiment. FIG. 5 is an external perspective view of the contact X viewed from another angle. FIG. 6 is an external perspective view of the contact X viewed from another angle. FIG. 5 is a perspective view showing an upper half of a contact X with the upper half omitted. It is explanatory drawing regarding manufacture of the 1st member which concerns on this embodiment. It is explanatory drawing regarding manufacture of the 2nd member which concerns on this embodiment. 5 is an explanatory diagram relating to the manufacture of a contact X. FIG. 5 is an explanatory diagram regarding component connection using a contact X. FIG. 5 is an explanatory diagram regarding component connection using a contact X. FIG. 4 is a cross-sectional view of the vicinity of a protrusion of a contact X. FIG. FIG. 6 is an explanatory diagram regarding the vicinity of a protrusion of a contact X. It is explanatory drawing regarding the shape of a protrusion part.

  Embodiments of the present invention will be described below with reference to the drawings. In the following description, the vertical and horizontal directions and the front and rear directions (directions orthogonal to each other) are as shown in FIG.

  A contact X according to an embodiment (Embodiment 1) of the present invention is a contact with a housing (bending type) in which a housing and a leaf spring portion are formed by bending a series of conductive members (Patent Document 1). The same type as the contact), and has one feature in the shape of the protruding portion provided on the free end side of the spring portion. Hereinafter, this point will be sequentially described with reference to the drawings.

[overall structure]
1 to 3 are external perspective views of the contact X according to the first embodiment when viewed from various viewpoints. FIG. 4 is a perspective view (a view from the same viewpoint as FIG. 1) with the upper half of the contact X omitted. In addition, as shown in FIG. 4, the contact X is comprised using the 1st member Y1 and the 2nd member Y2.

  A first member Y1 shown in FIG. 4 is a member in which a box-shaped housing portion 1 and a leaf spring portion 2 are formed by bending a series of metal plate materials (see FIGS. 5 and 7). The second member Y2 is a member in which a convex protrusion 4a is formed by drawing on another plate material having the same material and thickness as the first member Y1 (see FIGS. 6 and 7). The protruding portion 4a is composed of a contact portion 4a1 on the tip side that is a part of a spherical surface and a truncated cone-shaped support portion 4a2 that is connected to the contact portion 4a1, and normally the contact portion 4a1 is electrically connected to the connection object. Touch. The manufacturing process of the contact X using these members will be described again.

  The configuration of each part of the contact X will be described with reference to FIGS. 1 to 4. The housing part 1 has a lower wall part 11, a rear wall part 12, a left front wall part 13, a right front wall part 14, and an upper wall part 15, and accommodates part of the leaf spring part 2 and the second member Y2. It is formed in a substantially rectangular parallelepiped casing shape (however, a part of the front side and both the left and right sides are open).

  That is, when viewed from the leaf spring part 2, the lower wall part 11 is arranged to be a lower wall, the rear wall part 12 is arranged to be a rear wall, the left front wall part 13 and the right side wall The front wall portion 14 is arranged to be a front wall, and the upper wall portion 15 is arranged to be an upper wall.

  The rear wall portion 12 is formed to be bent so as to rise from the rear edge of the lower wall portion 11, and the left front wall portion 13 and the right front wall portion 14 are separated from the front edge of the lower wall portion 11. It is bent so that it stands up. The upper wall portion 15 is formed to be bent forward from the upper edge of the rear wall portion 12, and the front edge of the upper wall portion 15 is formed between the left front wall portion 13 and the right front wall portion 14. It is fixed to the upper edge.

  Between the left front wall part 13 and the right front wall part 14, an opening part 17 opened forward is formed. The opening 17 includes a right edge (extending vertically) of the left front wall 13, a front edge (extending left and right) of the lower wall 11, and a left edge of the right front wall 14 ( And a rectangular region surrounded by the front edge of the upper wall portion 15 (extending left and right). It can be seen that the outer surface of the left front wall portion 13, the outer surface of the right front wall portion 14, and the opening 17 are substantially on the same plane. Further, the left front wall portion 13 and the right front wall portion 14 can be regarded as an integrated front wall portion, and the opening portion 17 can be regarded as a portion where a part of the front wall portion is opened.

  The leaf spring portion 2 is a belt-like portion (width direction coincides with the vertical direction) extending from the right end of the lower wall portion 12 and is formed to meander inside the housing portion 1 when viewed in the width direction. Yes. More specifically, the leaf spring part 2 is formed by connecting a right turn part 21, a rear straight part 22, a left turn part 23, and a front straight part 24 in order from the right end of the lower wall part 12.

  The right turn portion 21 is a portion bent so as to make a U-turn by drawing a semicircle toward the front from the right end of the lower wall portion 11 when viewed in the width direction. The rear straight portion 22 is a portion that straightly travels leftward from the end of the right turn portion 21 when viewed in the width direction. The left turn portion 23 is a portion bent so as to make a U-turn by drawing a semicircle toward the front from the end portion of the rear straight advance portion 22 when viewed in the width direction. The front rectilinear portion 24 is a portion that straightly travels rightward from the end of the left turn portion 23 when viewed in the width direction.

  The front rectilinear portion 24 is disposed immediately behind the left front wall portion 13, the right front wall portion 14, and the opening portion 17, and a fitting hole 24 a is provided at a position facing the opening portion 17. The projecting portion 4a of the second member Y2 is fitted into the fitting hole 24a from the rear until the front surface of the plate-like portion 5 comes into contact with the rear surface of the front rectilinear portion 24. In this state, the plate-like portion 5 is placed on the front side. It is fixed to the rectilinear portion 24 by spot welding.

  In addition, the part from the rear side rectilinear advance part 22 to the front side rectilinear advance part 24 forms the U-shaped part which became a substantially U shape seeing in the up-down direction (width direction). The U-shaped portion is substantially U-shaped by connecting the front rectilinear portion 24 provided with the fitting hole 24a and the rear rectilinear portion 22 parallel to the rear side thereof at the left end portions. Since the leaf spring portion 2 has a meandering shape including such a U-shaped portion, the leaf spring portion 2 has a stable elasticity and exhibits an appropriate contact force as compared with, for example, a cantilever shape. The movement range (working area) of the projected portion 4a can be widened.

  As described above, one end of the leaf spring portion 2 is fixed to the housing portion 1 (more specifically, the lower wall portion 12), and the second member Y2 including the protruding portion 4a is fixed to the free end side of the other end. ing. In addition, the protrusion part 4a in Embodiment 1 is the part (namely, position of the opening part 17) protruded ahead from the opening part 17 in the state (henceforth a "standby state") which is not moving back. Points closer to the tip).

  The entire protruding portion 4a protrudes from the opening 17 in the standby state, but moves toward the inside of the housing portion 1 when the tip contact portion 4a1 is pushed rearward. The leaf spring portion 2 is provided inside the housing portion 1 and functions as a leaf spring that biases the protruding portion 4a forward.

  In the standby state, the front rectilinear portion 24 is configured to urge one or both of the left front wall portion 13 and the right front wall portion 14 forward with a slight force by the action of the leaf spring. It is in close contact with the part. However, the front rectilinear portion 24 may not be in contact with either the left front wall portion 13 or the right front wall portion 14. In any case, when the protruding portion 4a is pushed rearward, the leaf spring portion 2 is bent correspondingly, and the leaf spring portion 2 acts to urge the protruding portion 4a forward.

  Further, the housing portion 1 accommodates a part of the leaf spring portion 2 and the second member Y2, and plays a role of protecting from external object collision, foreign matter adhesion, and the like. The right end (right turn part 21) of the leaf spring part 2 does not protrude outside the opening end face on the right side of the housing part 1, and is effectively protected from an object collision or the like. The left end (left turn part 23) of the leaf spring part 2 does not protrude outside the left end face of the housing part 1 and is effectively protected from an object collision or the like.

  In order to make the protection more sufficient, the housing portion 1 may be formed with wall portions on the left side and the right side (or one of them). However, in the manufacturing process of the contact X, when the second member Y2 is inserted into the housing part 1 after the formation of the first member Y1, as shown in FIG. An opening is provided on the right side of the part 1.

  Further, the leaf spring portion 2 is not rubbed against the lower wall portion 11 or the upper wall portion 15 so that the movement is not hindered, and between the leaf spring portion 2 and the lower wall portion 11 and between the leaf spring portion 2 and the upper wall portion 15. A moderate gap is secured between them. The contact X has the configuration described above, and functions as a component for electrically connecting the connection target in contact with the protrusion 4a to the connection target. Further, the contact X is a very miniaturized component, and the dimension of each direction of the housing portion 1 is about 1 to 3 mm.

The contact X of the first embodiment is configured as described above, and the shape of the protruding portion 4a is characteristic.
[Details of protrusion shape]
Details of the shape of the protrusion 4a will be described with reference to FIG. FIG. 10 is a cross-sectional view in the vicinity of the protruding portion of the contact X in a standby state (a cross-sectional view taken along a plane passing through the tip of the protruding portion 4a and having the vertical direction as a normal line). For convenience of explanation, virtual lines L1 to L2, virtual planes S1 to S3, and virtual sphere M1 extending in the front-rear direction are defined as shown in FIG.

  As shown in the figure, the plate-like portion 5 is connected and fixed to the rear surface of the front rectilinear portion 24, and the front surface of the front rectilinear portion 24 abuts the rear surfaces of the left front wall portion 13 and the right front wall portion 14. The raised portion 4 connected to the plate-like portion 5 is a rotating body having the imaginary line L1 as a central axis, and protrudes forward of the opening portion 17 through the fitting hole 24a. The portion of the raised portion 4 that protrudes forward from the opening 17 (the region portion from the virtual plane S1 to the virtual plane S3) is the protruding portion 4a, of which the portion from the virtual plane S1 to S2 is the support portion 4a2. A portion from the virtual plane S2 to S3 is the contact portion 4a1.

  The outer surface (surface exposed to the outside) of the protrusion 4a has a side surface shape of the rotating body with the virtual line L1 as the central axis. More specifically, the outer surface is a side surface of a truncated cone having the virtual line L1 as the central axis in the support portion 4a2 from the virtual plane S1 to the virtual plane S2, and from the virtual plane S2 to the virtual plane S3. In the contact part 4a1, the center is a part of the virtual spherical surface M1 on the virtual line L1. Accordingly, the outer shape of the protruding portion 4a is substantially conical, and the outer peripheral side surface is inclined all over. In this respect, it differs from the prior art.

  Thus, the outer surface of the protrusion 4a has a shape in which the side surface of the truncated cone and a part of the phantom spherical surface M1 are connected in order from the root of the portion protruding from the opening 17. Furthermore, the virtual spherical surface M1 is in contact with the side surface of the truncated cone at the connected position. That is, when viewed in FIG. 10, the virtual line L2 that overlaps the side surface of the truncated cone is in contact with the virtual circle that overlaps the virtual spherical surface M1 on the virtual plane S2. In the following description, as shown in FIG. 10, the angle formed by the virtual lines L1 and L2 is the angle θ, the protrusion amount of the protrusion 4a from the opening 17 to the front is the protrusion amount P, and the protrusion at the base of the protrusion The width (size in the vertical and horizontal directions) of the outer surface of the portion 4a is defined as a width D.

  The outer surface shape of the protrusion 4a described above is appropriately determined in consideration of the safety of the contact X and the like. This point will be described more specifically with reference to FIG.

  First, the outer surface of the protrusion 4a forms a curved surface surrounding the virtual line L1 (extending forward from the opening 17), and continuously forward from the root of the portion protruding from the opening 17 to the tip. An inclination is provided so as to approach the virtual line L1 as viewed. Therefore, at any position from the base to the tip of the projecting part, if any object collides with the projecting part 4a from the side, the outer surface shape of the projecting part 4a acts to flow the object to the front side. It is possible to weaken the impact. Further, in this embodiment, since such an inclination is provided at any position in the circumferential direction with reference to the virtual line L1, it is possible to weaken the impact no matter which position in the circumferential direction the object collides. is there.

  For example, when there is a collision of an object as shown by a white arrow in FIG. 11, the object is received in the direction shown by a solid arrow in the figure. As a result, the protrusion is protruded compared to the case where the above-described inclination is not provided on the outer surface of the protrusion 4a (when the object does not act to flow the object forward like the cylindrical contact member 8 in FIG. 4 of Patent Document 2). The impact received by the portion 4a is greatly suppressed. Therefore, deformation and damage of the protrusion 4a are prevented as much as possible, and the safety of the contact X is improved.

  Further, as the angle θ is increased, the action of flowing the object to the front side becomes stronger, but basically, the width D required to obtain the same protrusion amount P is increased accordingly, so from the viewpoint of miniaturizing the contact X. It may be preferable to decrease the angle θ. The angle θ may be determined in consideration of the required protrusion amount P and width D specifications in addition to the safety required for the contact X. In the present embodiment, since the outer surface of the support portion 4a2 has the shape of a truncated cone, the width D is successfully reduced as much as possible while maintaining the inclination of the angle θ at any position in the support portion 4a2. .

  Further, since the outer surface of the contact portion 4a1 has a shape of a part of a spherical surface as described above, it is suitable for maintaining a stable contact with a connection object in front. For example, as shown in FIG. 11, not only when the connection target touches the front end of the contact part 4a1 (see Q1 in the figure) but also when the contact target is slightly shifted from the front end (see Q2 in the figure). Even if it exists, the rounded part of the contact part 4a1 can be made to contact a connection object similarly.

  In addition, since the round part of the contact part 4a1 is made to contact a connection object, concentration of both contact loads is suppressed as much as possible. As a result, fretting wear due to contact between the contact portion 4a1 and the connection object is less likely to occur, and the occurrence of fretting corrosion (corrosion) due to peeling of the plating of the protruding portion 4a can be suppressed as much as possible. The contact portion 4a1 has a circular arc in section, but may be a cycloid curve or an elliptic curve, and may be a flat surface.

  As described above, since the outer peripheral side surface of the protruding portion 4a in the first embodiment is inclined, the impact force is distributed in the inclined direction even if a horizontal impact is applied from any direction around the protruding portion 4a. Therefore, the impact which deform | transforms the protrusion part 4a is relieved greatly, and the durability with respect to a deformation | transformation improves rather than the former thing.

  Furthermore, the impact force in the direction perpendicular to the inclined surface of the protrusion 4a is dispersed in the downward vertical direction and the horizontal direction, and the downward vertical impact force is absorbed as a force for retracting the leaf spring portion 2. The impact force that deforms the protrusion 4a is further alleviated. In short, the impact force on the projecting portion 4a from the outside is greatly relieved by the above two actions, so that the deformation of the projecting portion 4a is suppressed.

  Therefore, even if this shape is applied to the contact member 8 of FIG. 4 in Patent Document 2, durability against deformation is increased, so that the thickness of the housing 7 and the length of the holding portion of the contact member 8 are shortened. It is possible to reduce the size of the contact.

  The shape of the protruding portion 4a is substantially conical, and the outer surface of the supporting portion 4a2 is characterized in that it is inclined in the direction of convergence toward the front. However, since the base is widened toward the base, the area of the base is larger than the bottom surface of the contact portion 4a1, and the contact is enlarged accordingly.

  Moreover, although the protrusion part 4a in Embodiment 1 is substantially conical shape, you may make the horizontal cross-sectional shape elliptical or triangular. The cross-sectional shape may be changed according to the shape on the hem side. Although the probability that the object hits the direction orthogonal to the inclined surface of the support portion 4a2 is low, in consideration of such a case, the overall shape of the protruding portion 4a may be formed in a hemispherical shape. Further, when the shape is a cycloid curved surface, since the inclination on the root side is large, the deformation resistance is high regardless of the direction from which the impact is applied.

  Incidentally, when an object collides in a direction orthogonal to the inclined surface of the support portion 4a2, the dispersed spring force in the downward vertical direction is absorbed by the leaf spring portion 2 retreating. Compared to a contact member that cannot absorb an impact, such as a contact member, the impact on deformation can be reduced.

  Further, the probability that an object hits the support 4a2 of the protrusion 4a is high on the tip side and low on the root side, so that the area of the root can be reduced by making the slope on the lower side of the support 4a2 steep. That is, it is possible to achieve impact resistance and a reduction in diameter by setting the inclination angle of the support portion 4a2 to at least two stages. In this case, it is possible to prevent the impact of the portion where the inclination angle is changed from increasing by performing R-face processing on the portion where the inclination angle is changed.

  Note that the contact member 8 (corresponding to the protruding portion 4a of the first embodiment) disclosed in FIG. 4 and the like of Patent Document 2 is, as shown in FIG. The contact portion 4a1) is inclined with respect to the protruding direction, but the remaining region R2 (corresponding to the support portion 4a2 of the first embodiment) is not inclined. There's a problem. FIG. 12 shows a cross section similar to that of FIG. In this regard, as shown in FIG. 12B of the present application, even when the region R2a is inclined and the portion of the region R2b closer to the root is not inclined due to the limitation of the root area, According to the principle equivalent to that of the invention, the impact resistance is improved at least by that amount as compared with the embodiment shown in FIG. In short, the effect of the present invention can be obtained by bringing the rear end of the inclined surface as close as possible to the root side.

[About forming the protruding part as a separate member]
Next, in the configuration of the first embodiment, the first member Y1 and the second member Y2 in which the protruding portion 4a is formed by drawing are used as separate members, and the free end side of the leaf spring portion 2 formed on the first member Y1 is arranged. Another feature is that the second member Y2, which is a separate member, is fixed.

  That is, a conventional spring member with a housing formed by bending a series of conductive members (for example, the one of Patent Document 1) has a protruding portion formed by the series of conductive members themselves. When this is applied to the present embodiment, the projecting portion 4a having a substantially conical shape can be formed integrally with the first member Y1 itself by drawing the free end side of the leaf spring portion 2. .

  In this case, since the external force that deforms the protruding portion 4a by the above-described impact response action can be made considerably smaller than the external force with respect to the vertical cylindrical peripheral surface, even if it is the same as the plate thickness of the first member Y1, it is durable. Sex is enough. In other words, if the protruding portion 4a is cylindrical, it is necessary to use a member having a thickness greater than that of the first member Y1, and the protruding portion is integrally formed by drawing the spring portion 2 of the first member Y1. When formed, the strength is insufficient.

  However, the present inventor has noticed the following technical facts. That is, when the protruding portion 4a is formed on the free end side of the leaf spring portion 2 by drawing, the influence of deformation that occurs during drawing is applied to the U-shaped leaf spring portion 2, and residual stress remains in the leaf spring portion 2. Therefore, it becomes difficult for the elastic force to sufficiently satisfy the predetermined value. For this reason, it is difficult to form the protruding portion 4a on the leaf spring portion 2 by drawing under the condition that the contact X having a small size and limited size is formed.

  Based on this finding, the inventor originally used the second member Y2 having the same material and thickness as the first member Y1 to project the protrusion 4a on the series of first members Y1 by drawing. The portion 4 is formed by drawing, and the protruding portion 4a is fitted and fixed in a space called a fitting hole 24a provided in the leaf spring portion 2, whereby the second member Y2 having the same material and thickness as the first member Y1. Was used to form a spring material with a housing. By doing so, the projecting portion 4a could be formed into a conical shape while having the desired elastic force.

  And the space of the leaf | plate spring part 2 will be allocated with the same board | plate material, and it can almost eliminate the influence which uses another member Y2 in a performance surface. If another member having a different material or thickness than the first member Y1 is used, a member having a different material must be prepared, which may be undesirable in terms of material management, cost, or performance. However, as will be described later, the material and thickness may be changed between the first member Y1 and the second member Y2 as necessary.

  Further, the shape of the protruding portion 4a is substantially conical, and the outer surface of the support portion 4a2 other than the contact portion 4a1 is characterized in that it is inclined in the direction of convergence toward the front. However, since the base is expanded toward the base, the area of the base becomes larger than the cylindrical shape, and there is a possibility that the contact becomes large.

  However, the spring member 2 of Embodiment 1 requires a predetermined width dimension together with the plate thickness in order to exhibit the required elastic force. According to this width dimension, even if the protrusion 4a is expanded to the skirt, it is within the width dimension. Therefore, even if the protrusion 4a is formed in a substantially conical shape, the contact does not increase in size. As described above, the first embodiment can effectively improve the impact resistance without effectively increasing the size of the protruding portion 4a even if the protruding portion 4a is substantially conical, by effectively using the width dimension of the leaf spring portion 2. is there.

[Manufacturing process]
Next, the manufacturing method of the contact X of Embodiment 1 is demonstrated. As described above, the contact X is formed using the first member Y1 and the second member Y2. First, the manufacturing process of the first member Y1 will be described with reference to FIG.

  The upper side of FIG. 5 shows a part of the metal plate material Z1 in a state where a plurality of plate-like members Y1 ′ are connected to the carrier C1. The metal plate material Z1 has a shape shown in this figure, with unnecessary portions removed from a single sheet metal plate. As the material of the metal plate material Z1, for example, stainless steel (SUS301 or the like) is suitable. Each shape of the plate-like member Y1 ′ corresponds to a shape obtained by developing the first member Y1, and includes portions corresponding to the respective parts (11-15, 21-24) of the first member Y1, as shown in FIG. It is out.

  The metal plate Z1 is subjected to bending so that the first member Y1 is formed at a predetermined location of the plate-like member Y1 ′. In the final stage of the bending process, the left front wall portion 13 and the right front wall portion 14 are bent toward the rear wall portion 15 so as to confine the leaf spring portion 2 in the housing portion 1. The front end 13 a of the left front wall 13 is fitted and fixed in a recess 15 a provided at the edge of the rear wall 15, and the front end 14 a of the right front wall 14 is provided at the edge of the rear wall 15. It fits in the hollow 15b and is fixed. Thereafter, the plate-like member Y1 ′ is cut off from the carrier C1, and the first member Y1 shown on the lower side of FIG. 5 is obtained.

  Thus, since the plate-like member Y1 ′ is bent while being connected to the carrier C1, the bending can be easily performed even though the plate-like member Y1 ′ is a very small member. is there. Note that all or part of the bending process for the plate member Y1 ′ may be performed after the plate member Y1 ′ is separated from the carrier C1.

  The contact X is basically used by soldering and fixing the lower wall portion 11, the rear wall portion 12, or the upper wall portion 15 of the housing portion 1 to a connection target (circuit board or the like) (see FIG. 8). ). Therefore, plating for improving wettability and facilitating soldering is performed on the locations (for example, the vicinity of both left and right ends) of these portions (11, 12, 15).

  Next, the manufacturing process of the second member Y2 will be described with reference to FIG. The upper side of FIG. 6 shows a part of the metal plate material Z2 in a state where the plate-like member Y2 ′ is connected to the carrier C2. The metal plate Z2 may be in a state where a plurality of plate-like members Y2 ′ are connected to the carrier C2. Moreover, as a material of the metal plate material Z2, for example, stainless steel (SUS301 or the like) is suitable.

  After the metal plate material Z2 is drawn so that the substantially central portion of the plate-like member Y2 ′ is raised, the plate-like member Y2 ′ is separated from the carrier C2, and the second member shown in the lower side of FIG. Y2 is obtained. As is apparent from FIG. 6, a portion of the plate-like member Y <b> 2 ′ that is raised by the drawing process is the raised portion 4, and the remaining portion is maintained as the flat plate portion 5. The protrusion 4a (particularly near the tip) of the second member Y2 is plated to prevent wear and corrosion due to contact with the connection target.

  Next, a manufacturing process of the contact X using the first member Y1 and the second member Y2 will be described with reference to FIG. First, as shown in FIG. 7A, the second member Y <b> 2 is inserted into the housing part 1 from the opening on the right side of the housing part 1. In other words, the second member Y2 is inserted into the U-shaped portion (the portion from the rear rectilinear portion 22 to the front rectilinear portion 24 shown in FIG. 4) with the tip of the raised portion 4 facing forward. Is done. In addition, since the space | interval of the front side rectilinear advance part 24 and the rear side rectilinear advance part 22 is made larger than the front-back direction dimension of the 2nd member Y2, the 2nd member Y2 interferes with a U-shaped part at the time of insertion. Absent.

  When the second member Y2 is inserted to a position where the protruding portion 4a faces the fitting hole 24a, the second member Y2 is moved forward as shown in FIG. Is inserted into the insertion hole 24a from behind. This fitting is performed until the plate-like portion 5 comes into contact with the front rectilinear portion 24 as shown in FIG. Further, in the state of being fitted to this state, the plate-like portion 5 is welded and fixed to the front rectilinear portion 24 as shown in FIG. In the example shown in FIG. 7D, welding and fixing are achieved by applying laser light or the like to the four locations around the fitting hole 24a in the front rectilinear portion 24 from the front through the opening 17 and heating.

  As described above, the contact X is manufactured by separately preparing the first member Y1 and the second member Y2, and combining them. In this regard, for example, the projecting portion 4a can be formed by drawing the leaf spring portion 2 of the first member Y1, and the entire contact X can be formed from a single metal plate material. Since the first member Y1 and the second member Y2 are combined as described above, for example, there are the following advantages.

  First, it is possible to easily maintain the quality of the contact X. That is, if the leaf spring portion 2 is directly drawn, there is a concern that a part of the leaf spring portion 2 may be reduced in thickness or deformed during the processing, but in this embodiment, the leaf spring portion There is no such problem because the member having the number 2 (first member Y1) and the member to be drawn (second member Y2) are different. In particular, in a very small component such as the present embodiment, high dimensional accuracy is required to ensure performance, and therefore it is extremely important to suppress reduction in plate thickness and deformation of the leaf spring portion 2.

  Further, even if a defective product is generated due to a failure of the drawing process, only the member (second member Y2) has to be discarded, so there is little waste. Furthermore, in this embodiment, since the 2nd member Y2 is attached after the bending process about the 1st member Y1 is completed, the protrusion part 4a etc. are not damaged accidentally in the said bending process.

  Moreover, it is also possible to change a material and board thickness as needed between the 1st member Y1 and the 2nd member Y2. For example, for the first member Y1 that partially functions as a leaf spring, a material having a stable elasticity is used, and for the second member Y2 that is concerned about fretting due to contact with the connection target, It is possible to adopt a material with excellent corrosion resistance. It is also possible to adjust the plate thickness of the first member Y1 so as to optimize the elastic force of the leaf spring while setting the plate thickness of the second member Y2 so that it can withstand drawing.

  Furthermore, in this embodiment, since the second member Y2 is fitted into the fitting hole 24a provided in the leaf spring portion 2 in advance, it is easy to fix the second member Y2 accurately at a fixed position of the leaf spring portion 2. is there. Further, the second member Y2 is fixed in a state where the front surface of the plate-like portion 5 is in contact with the rear surface of the front rectilinear portion 24, so that the second member Y2 is firmly fixed, and a force that temporarily pulls forward is applied to the protruding portion 4a. Even if it adds, the 2nd member Y2 will not leave | separate from the spring part 2. FIG. The second member Y2 is not attached from the front via the opening 17 to the first member Y1 that has been bent, but is fitted into the fitting hole 24a from the rear. Therefore, the size of the plate-like part 5 may be larger than the opening part 17.

[Contact operation and usage]
Next, a usage example of the contact X will be described with a specific example. Here, an example in which an antenna pattern (component) is electrically connected to a circuit board (circuit) disposed in a waterproof region inside a portable communication device (for example, a mobile phone) will be described. The circuit board and the antenna pattern are both conductors, and the antenna pattern is an example of the “target to be connected” according to the present invention, and the circuit board is an example of the “target to be connected” according to the present invention.

  FIG. 8A shows a situation before the antenna pattern 82 is connected to the pattern on the circuit board 71. The contact X is fixed to the vicinity of the outer edge of the circuit board 71 by soldering the lower wall part 11 of the housing part 1 to the pattern on the circuit board 71. Thereby, the housing part 1 is electrically connected to the pattern on the circuit board 71. The circuit board 71 is disposed inside the frame 72 of the portable communication device (corresponding to the right side of the frame 72 in FIG. 8 and is a waterproof region), but the frame 72 is provided with a hole 72a. The circuit board 71 is exposed to the outside from the hole 72a.

  On the other hand, the antenna pattern 82 is disposed on the surface of the antenna cover 81 formed of, for example, reinforced plastic. Further, a waterproof rubber 83 made of a rubber material is attached to the surface of the antenna cover 81. The waterproof rubber 83 is formed in a frame shape that is slightly larger than the outer edge of the frame hole 72 a described above, and is disposed so as to surround a part of the antenna pattern 82. The contact portion 4a1 of the contact X protrudes outward from the frame 72, and the protruding amount is larger than the thickness of the waterproof rubber 83.

  FIG. 8B shows a situation in which the antenna cover 81 is brought closer to the frame 72 and the antenna pattern 82 is connected to the circuit board 71 from the situation of FIG. FIG. 9 shows the state of FIG. 8B viewed from the right side. The antenna cover 81 shown in these drawings is in close contact with the frame 72 via a waterproof rubber 83. Since the hole 72a of the frame 72 is sealed by the waterproof rubber 83, the waterproofing inside the frame 72 is maintained.

  Further, in the situation shown in FIG. 8B, the protrusion 4a of the contact X is pushed by the antenna pattern 82 from the front and is retracted into the housing portion 1 by that amount. And since the leaf | plate spring part 2 is urging | biasing the protrusion part 4a ahead, the protrusion part 4a becomes the shape which pushes the antenna pattern 82 with moderate force, and the protrusion part 4a and the antenna pattern 82 are stable. Contact has been obtained.

[Summary]
As described above, the contact X according to the present embodiment has the housing part 1 provided with the opening part 17 opened forward, the front part protrudes forward from the opening part 17, and is pushed rearward toward the inside of the housing part 1. A projecting portion 4a that moves and a leaf spring portion 2 that is provided inside the housing portion 1 and biases the projecting portion 4a forward, and a connection target that contacts the projecting portion 4a is a target to be connected. It is to be electrically connected. And the outer surface of the protrusion part 4a forms the surface surrounding the virtual line L1 extended ahead from the opening part 17, and the said surface is an inclined surface extended toward the root from the front-end | tip of the said protrusion, Comprising: The rear end is as close to the root as possible.

  Therefore, according to the contact X, although it is a spring type with a housing, even if there is an impact such as a foreign object hitting the side surface of the protruding portion, the protruding portion can be hardly deformed or damaged. As a result, the reliability of the contact with respect to the electrical contact performance can be improved. In the example of the first embodiment, the outer surface of the protruding portion 4a forms a surface surrounding the virtual line L1 extending forward from the opening 17, and the virtual line L1 and the virtual line L1 as it advances forward from the base of the protrusion to the tip. The distance is reduced.

  As mentioned above, although the specific example was given and demonstrated about embodiment of this invention, this invention is not limited to the content. The present invention can be implemented in various specific forms without departing from the spirit of the present invention.

  The present invention can be used for, for example, a contact provided in a portable communication device.

DESCRIPTION OF SYMBOLS 1 Housing part 11 Lower wall part 12 Rear wall part 13 Left front wall part 14 Right front wall part 15 Upper wall part 17 Opening part 2 Leaf spring part 21 Right turn part 22 Rear side rectilinear part 23 Left turn part 24 Front side rectilinear part 24a Insertion hole 4 Protruding part 4a Protruding part 4a1 Contact part 4a2 Supporting part 5 Plate-like part 71 Circuit board 72 Frame 72a Hole provided in the frame 81 Cover for antenna 82 Pattern for antenna 83 Waterproof rubber X Contact Y1 First member Y2 Second member Z1, Z2 Metal plate material

Claims (8)

A housing part provided with an opening part opened forward;
A protrusion that protrudes forward from the opening and is retractable into the housing part;
A spring portion provided in the housing portion and biasing the protrusion forward.
A contact for electrically connecting a connection target in contact with the protrusion to a connection target,
The outer surface of the protrusion is
Forming a surface surrounding a line extending forward from the opening;
The contact is an inclined surface that extends from the tip of the protrusion toward the base, and the contact is characterized in that the rear end of the inclined surface is brought as close to the root as possible. The outer surface of the protrusion is
A side surface shape of the rotating body with the line as a central axis, and a shape in which a side surface of a truncated cone and a part of a spherical surface are connected in order from the base,
The contact according to claim 1, wherein the spherical surface is in contact with a side surface of the truncated cone at the connected position. The spring part is a leaf spring part having one end fixed to the housing part,
The contact according to claim 1, wherein the protruding portion is fixed to the other end side of the leaf spring portion. The housing part and the leaf spring part are formed by bending a series of metal plate materials,
The contact according to claim 3, wherein the protruding portion is formed of a member different from the series of metal plate materials. A first member formed by bending a series of metal plate members, the leaf spring portion having a fitting hole facing the housing portion and the opening;
The second member formed so that the raised portion including the protruding portion is raised from the plate-like portion by the drawing processing of the metal plate material is used,
The second member is fixed to the first member in a state in which the protruding portion is fitted into the fitting hole from the rear until the plate-like portion comes into contact with the leaf spring portion. Contact described. The leaf spring part is
It includes a U-shaped part in which the front straight part in which the fitting hole is formed and the rear straight part paralleled on the rear side are connected to each other so as to be substantially U-shaped in the width direction,
6. The contact according to claim 5, wherein a distance between the front rectilinear portion and the rear rectilinear portion is larger than a longitudinal dimension of the second member. A method of manufacturing a contact according to claim 5 or 6,
After the formation of the first member by the bending process, the raised portion is fitted into the fitting hole until the plate-like portion comes into contact with the plate spring portion, and the plate-like portion is welded and fixed to the plate spring portion. The manufacturing method characterized by the above-mentioned. A contact according to any one of claims 1 to 6;
A component to be connected;
A circuit to be contacted, and
A portable communication device, wherein an outer surface of the housing portion is bonded and fixed to the circuit, and the components are arranged so as to push the tip of the protruding portion backward.