JP2012142184A - Plug and connector device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plug capable of reducing an insertion force even when the length of a fitting guide of a plug side contact is short, and a connector device.SOLUTION: A plug of the present invention includes a plug side contact 30 having an axis B in the longitudinal direction and a fitting guide 32 on an external surface of a tip. The fitting guide 32 includes a curve having an angle with respect to the axis B, the angle continuously decreasing as the fitting guide recedes from the tip of the plug side contact 30 along the axis B.

Description

  The present invention relates to a plug and a connector device using the plug.

  Connector devices incorporated in electronic circuits such as servers and routers are becoming multipolar and miniaturized, and more contacts (terminals) are provided to connect a large number of wires to plugs and sockets of the connector devices. It became so. For example, Patent Document 1 discloses a connector socket module having a large number of contacts.

  There is also known a connector device in which a plug-side pin-shaped contact (hereinafter referred to as a plug-side contact) is inserted into a socket-side bifurcated or fork-shaped contact (hereinafter referred to as a socket-side contact). In this connector device, as the number of contacts increases, the insertion force required to insert the plug into the socket increases proportionally.

  In this type of connector device, the plug-side contact is generally provided with a tapered tip portion having an outer surface inclined at a uniform angle with respect to the longitudinal axis of the plug-side contact as a so-called fitting guide. The length of the plug-side contact is described as an angle with respect to the axis of the fitting guide (hereinafter referred to as a taper angle) after ensuring the length of the portion that can properly contact the socket-side contact (effective fitting length). In some cases, the insertion force is sufficiently small to reduce the insertion force.

JP 2007-273432 A

  However, in recent years, further miniaturization of the connector device has progressed, and it is required to shorten the length of the plug-side contact. Even when the length of the plug-side contact is short, it is necessary to provide a predetermined effective fitting length to ensure the reliability of contact with the socket-side contact. It becomes difficult to make the taper angle sufficiently small.

  Therefore, there is a demand for a plug that can reduce the insertion force even when the length of the fitting guide of the plug-side contact is short, and a connector device that uses the plug.

  One aspect of the present invention is a plug including a plug-side contact having a longitudinal axis and having a fitting guide on an outer surface of a tip portion, and the fitting guide extends from the tip of the plug-side contact to the axis. Provided is a plug characterized in that it includes a curved surface whose angle with respect to the axis continuously decreases as it moves away.

  According to another aspect of the present invention, there is provided a plug having a plug-side contact having a longitudinal axis and having a fitting guide on an outer surface of a tip portion, and the fitting guide extends from a tip of the plug-side contact. The plug includes a plurality of slopes whose angles with respect to the axis gradually decrease as the distance from the axis increases.

  The plurality of slopes may provide a plug that is smoothly connected by a curved surface.

  According to still another aspect of the present invention, there is provided a plug having a plug-side contact having a longitudinal axis and having a fitting guide on an outer surface of a tip portion, and a socket side having a receiving portion for receiving the plug-side contact. A socket provided with a contact, wherein the receiving portion of the socket-side contact includes an elastically displaceable first contact piece and a second contact piece that sandwich the plug-side contact. The fitting guide of the plug side contact has a first contact surface that contacts the first contact piece of the socket side contact and a second contact surface that contacts the second contact piece, and the fitting As at least one of the first contact surface and the second contact surface of the guide moves away from the tip of the plug-side contact along the axis, the angle with respect to the axis continues. Including a curved surface that decreases manner, to provide a connector apparatus characterized by.

  According to still another aspect of the present invention, there is provided a plug having a plug-side contact having a longitudinal axis and having a fitting guide on an outer surface of a tip portion, and a socket side having a receiving portion for receiving the plug-side contact. A socket provided with a contact, wherein the receiving portion of the socket-side contact includes an elastically displaceable first contact piece and a second contact piece that sandwich the plug-side contact. The fitting guide of the plug side contact has a first contact surface that contacts the first contact piece of the socket side contact and a second contact surface that contacts the second contact piece, and the fitting As at least one of the first contact surface and the second contact surface of the guide moves away from the tip of the plug-side contact along the axis, the angle with respect to the axis increases. Comprising a plurality of slope decreasing manner, to provide a connector apparatus characterized by.

  The plurality of slopes provide a connector device that is smoothly connected by a curved surface.

  In the plug of the present invention, the plug-side contact has a fitting guide including a curved surface in which an angle (taper angle) with respect to the axis continuously decreases as the plug-side contact moves away from the tip along the axis. Therefore, since the taper angle can be relatively increased near the tip of the plug-side contact, the length of the fitting guide is reduced compared to a fitting guide formed with a uniform taper angle as in the prior art. Can be shortened. By shortening the length of the fitting guide, it is possible to further reduce the size of the plug-side contact while ensuring the effective fitting length of the plug-side contact.

  In the plug of the present invention, the plug-side contact has a fitting guide including a plurality of inclined surfaces in which an angle (taper angle) with respect to the axis gradually decreases as the plug-side contact moves away from the tip along the axis. Yes. Since the tip of the plug-side contact is formed with a slope with a relatively large taper angle, the length of the fitting guide is shortened compared to a fitting guide formed with a uniform taper angle as in the past. be able to.

  In the connector device of the present invention, the socket is provided with a socket-side contact having a receiving portion for sandwiching the plug-side contact by the first and second contact pieces that can be elastically deformed. In such a socket-side contact, since the deformation amount of the first and second contact pieces is small in the initial stage of inserting the plug-side contact, the force (contact) that each contact piece presses and holds the plug-side contact. (Force) is also small. On the other hand, when the insertion of the plug-side contact proceeds, the deformation amount of the first and second contact pieces increases, the contact force of each contact piece with respect to the plug-side contact increases, and the insertion force necessary for the insertion also increases. In the connector device of the present invention, the plug is provided with a plug-side contact having a fitting guide including a curved surface whose angle with respect to the axis (taper angle) continuously decreases. For this reason, in the initial stage of insertion, the first and second contact pieces of the socket-side contact are contacted at a relatively large taper angle, but the contact force of the first and second contact pieces is weak as described above. Does not require great force for contact insertion. Therefore, near the tip, the taper angle can be increased to shorten the length of the fitting guide. On the other hand, the insertion force can be reduced since the taper angle of the fitting guide is reduced at the position where the insertion progresses and the contact force between the first and second contact pieces increases. Therefore, if a plug provided with a plurality of such plug-side contacts is used, the connector device can be miniaturized and a connector device with reduced plug insertion force can be realized.

  In the connector device of the present invention, the plug may include a plug-side contact having a fitting guide including a plurality of inclined surfaces in which an angle with respect to the axis (taper angle) decreases stepwise. In the vicinity of the tip of the plug-side contact, a slope with a large taper angle is formed to shorten the length of the fitting guide, while a slope with a small taper angle is formed at a position where the contact force between the first and second contact pieces increases. By doing so, the insertion force can be reduced. Therefore, if a plug provided with a plurality of such plug-side contacts is used, the connector device can be miniaturized and a connector device with reduced plug insertion force can be realized.

It is a perspective view which shows the connector apparatus of 1st embodiment. FIG. 2A is a perspective view showing the plug-side contact of the plug and the socket-side contact of the socket according to the first embodiment, and FIG. 2B shows the state where the socket-side contact sandwiches the plug-side contact. It is a side view. It is a side view showing the upper half of the plug-side contact of the plug of the first embodiment, It is a side view which shows the upper half of the plug side contact of the plug of 2nd embodiment. It is a graph which shows the change of the insertion force at the time of inserting the plug side contact of the plug of 1st embodiment, and the plug side contact of the plug of 2nd embodiment in the socket side contact. It is a side view which shows the upper half of the plug side contact of the plug of 3rd embodiment.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. In the following embodiments, the same or similar components are denoted by common reference numerals.

(First embodiment)
FIG. 1 is a perspective view showing a connector device 1 according to the first embodiment. The connector device 1 according to this embodiment includes a socket 2 and a plug 3. A plurality of plug-side contacts 30 are provided in parallel on the plug 3, and a socket-side contact 20 that receives each plug-side contact 30 is provided on the socket 2.

  FIG. 2A is a perspective view showing the socket-side contact 20 of the socket 2 and the plug-side contact 30 of the plug 3 provided in the connector device 1 before the plug-side contact 30 is inserted into the socket-side contact 20. It is a figure which shows the state of. FIG. 2B is a side view showing a state where the plug-side contact 30 is inserted into the socket-side contact 20, and shows a state where the socket-side contact 20 sandwiches the plug-side contact 30.

  The plug-side contact 30 is an elongated member having a central axis B in the longitudinal direction, and includes a main body portion 31 having a constant thickness D and a fitting guide 32 formed on the outer surface of the tip portion. The fitting guide 32 is inclined and tapered with respect to the central axis B so that the plug-side contact 30 can be easily inserted into the socket-side contact 20. This embodiment is characterized by the shape of the fitting guide 32, and details thereof will be described later. The plug-side contact 30 is a metal conductor member, and can be energized by being inserted into and fitted into the socket-side contact 20.

  The socket side contact 20 is a metal conductor member and includes a receiving portion 21 that receives the plug side contact 30. And in order to pinch the plug side contact 30 in the receiving part 21, the 1st contact piece 22a and the 2nd contact piece 22b which can be elastically displaced are provided. As shown in the figure, the first contact piece 22a and the second contact piece 22b are formed vertically symmetrically with the central axis B as the symmetry axis. The first contact piece 22a and the second contact piece 22b are provided to be parallel to each other with a space therebetween, and the plug-side contact 30 is inserted therebetween. Further, the first contact piece 22 a and the second contact piece 22 b are integrated at their root portions 24. Protrusions 23a and 23b that project directly so as to face each other and that directly contact the plug-side contact 30 are formed at the tip portions of the first contact piece 22a and the second contact piece 22b. A gap 25 is provided between the two protrusions 23 a and 23 b, and the plug-side contact 30 is inserted into the socket-side contact 20 through the gap 25. The size of the gap 25 is slightly smaller than the thickness D of the main body portion 31 of the plug-side contact 30 in the initial state where the first contact piece 22a and the second contact piece 22b are not bent. When the plug-side contact 30 is inserted into the gap 25 as shown in FIG. 2B, the first contact piece 22a and the second contact piece 22b are elastically deformed, and the protrusions 23a and 23b of the respective contact pieces The plug side contact 30 is pressed. In this way, the socket side contact 20 can sandwich the plug side contact 30. The larger the length L of the main body portion 31 (the portion indicated by reference numeral 31a) of the plug-side contact 30 inserted into the socket-side contact 20, the greater the effective fitting length, and the socket-side contact 20 is connected to the plug-side contact 30. Can be held stably.

  Further, the protrusions 23a and 23b of the first contact piece 22a and the second contact piece 22b of the present embodiment are provided on the side of the socket side contact 20 (A in FIG. 2A) so that the plug side contact 30 can be easily inserted. The shape seen from the direction) is formed in a semicircular shape, and a portion that contacts the outer surface of the plug-side contact 30 is a curved surface. However, the shape of the protrusions 23a and 23b is not limited to a semicircular shape, and may be another shape such as a semielliptical shape, a quadrangular shape, or a triangular shape having an inclined surface with respect to the central axis B.

  The plug-side contact 30 provided on the plug 3, particularly the fitting guide 32 provided on the outer surface of the tip portion will be described in detail. As described above, the plug-side contact 30 is a metal conductor member, and has a slender shape as shown in the figure. The plug-side contact 30 has a central axis B in the major axis direction and is vertically symmetrical with the central axis B as the axis of symmetry. ing. The main body portion 31 has a constant thickness D, but the fitting guide 32 at the distal end portion is inclined and tapered with respect to the central axis B so as to be easily inserted into the socket-side contact 20. Further, the fitting guide 32 has a first contact surface 32a that contacts the first contact piece 22a of the socket-side contact 20, and a second contact surface 32b that contacts the second contact piece 22b.

  FIG. 3 is a view showing the shape of the fitting guide 32 of the plug-side contact 30 provided in the plug 3 of the present embodiment, and is a side view seen from the A direction shown in FIG. And the shape above the central axis B of the plug side contact 30 shown to Fig.2 (a), ie, the shape of the upper half of the plug side contact 30, is shown. Further, a contact state between the first contact piece 22a of the socket side contact 20 and the first contact surface 32a of the plug side contact 30 at the time of insertion is shown. As described above, the plug-side contact 30 is configured to be vertically symmetrical with the central axis B as the axis of symmetry, and the lower shape and effects of the fitting guide 32 are the same as those on the upper side. I will do it.

  As shown in the figure, the first contact surface 32a, which is a part of the fitting guide 32, extends from the front end 32aa of the fitting guide 32 to the rear end 32ab connected to the main body portion 31 along the central axis B of the plug-side contact 30. The angle θ with respect to the central axis B (hereinafter referred to as the taper angle θ may be described as the taper angle θ may be described as angles θ1 and θ2 in FIG. If they are different from each other, they are numbered to be distinguished from each other). That is, the first contact surface 32a of the fitting guide 32 is a curved surface that bulges outward, and the curved surface is formed by a curved surface 33 having a radius of curvature R1 and a curved surface 34 having a radius of curvature that is continuous thereto. .

  By using such a fitting guide 32, for example, as shown in FIG. 3, when the first contact piece 22a is positioned at C1 (position indicated by a solid line) at the initial stage of insertion, the first contact piece 22a The protrusion 23a contacts the portion of the first contact surface 32a with the taper angle θ1, but when the insertion proceeds and the first contact piece 22a is positioned at C2 (position indicated by the dotted line), the protrusion 23a is in contact with the first contact surface. It comes into contact with a portion having a taper angle θ2 smaller than the taper angle θ1 of 32a. When the plug-side contact 30 is pressed and clamped by the first contact piece 22a and the second contact piece 22b that are elastically deformed like the socket-side contact 20, the first contact piece 22a and the second contact piece 22b are inserted as the insertion proceeds. And the force for pressing the plug-side contact 30 (contact force) increases. Therefore, conventionally, the entire fitting guide is formed at a relatively small taper angle, for example, the taper angle θ2 when the first contact piece 22a is positioned at C2 in order to reduce the insertion force. However, if the fitting guide is formed by a surface that is uniformly and linearly inclined at a relatively small taper angle θ2, it is necessary to increase the length of the fitting guide, which hinders downsizing of the plug-side contact 30. It became a factor. As in the fitting guide 32 of the present embodiment, if the taper angle θ is continuously decreased as it is farther from the tip, that is, the taper angle θ is continuously increased toward the tip portion, Since it is formed with a relatively large taper angle θ in the vicinity of the tip 32aa, the length L2 of the fitting guide 32 can be shortened.

Next, the relationship between the force (contact force Pk) at which the first contact piece 22a of the socket-side contact 20 presses the plug-side contact 30 and the insertion force P at which the plug-side contact 30 is inserted will be described. As described above, the plug-side contact 30 of the present embodiment has the fitting guide 32 formed so that the taper angle θ decreases as the distance from the tip end 32aa along the axis B decreases. When the first contact piece 22a is located at the position C1, the first contact surface 32a of the fitting guide 32 is in contact with the protrusion 23a of the first contact piece 22a at the site of the taper angle θ1. Although not shown, the second contact surface 32b of the fitting guide 32 below the center axis B is also in contact with the protrusion 23a of the second contact piece 22b of the socket-side contact 20 at the site of the taper angle θ1. Thus, the tip of the plug-side contact 30 is pressed and sandwiched between the first contact piece 22a and the second contact piece 22b. Since the plug-side contact 30 and the socket-side contact 20 are formed vertically symmetrical about the central axis B, the contact force of the first contact piece 22a and the contact force of the second contact piece 22b are the same value Pk. Can be shown. Further, the friction coefficient of the portion where the first contact surface 32a and the protrusion 23a of the first contact piece 22a are in contact with each other, and the friction coefficient of the portion where the second contact surface 32b and the protrusion 23a of the second contact piece 22b are in contact with each other. And μ. In this case, the relationship between the insertion force P and the force (contact force Pk) by which the first contact piece 22a and the second contact piece 22b press and hold the plug-side contact 30 can be expressed by the following expression.
P = Pk (tan θ + μ) × 2
However, P: insertion force, Pk: contact force, θ: taper angle, μ: friction coefficient.

  The socket side contact 20 of the present embodiment presses and holds the plug side contact 30 by elastically deforming the first contact piece 22a and the second contact piece 22b. Therefore, as the tips of the first contact piece 22a and the second contact piece 22b move away from the central axis B due to the insertion of the plug-side contact 30, the deflection of the first contact piece 22a and the second contact piece 22b increases. The force (contact force) for pressing the contact 30 is increased. When the taper angle is uniform as in the conventional fitting guide, the value of tan θ is also constant. Therefore, the insertion force required according to the contact force is small in the initial stage of insertion, but the insertion force increases as the insertion proceeds. Becomes larger. On the other hand, if the taper angle θ decreases as the insertion proceeds as in the plug-side contact 30 of the present embodiment, the value of tan θ decreases, so that the insertion force can be reduced.

(Second embodiment)
Next, a second embodiment of the present invention will be described with reference to the drawings. The difference from the connector device of the first embodiment is the shape of the plug-side contact included in the plug, and the shape will be described below. FIG. 4 is a side view showing the shape of the plug-side contact 40 included in the plug of the second embodiment, and shows the shape above the central axis B, similarly to the plug-side contact 30 of FIG. In addition, since the socket of the connector apparatus of this embodiment and the socket side contact of the socket are the same as the socket 2 and the socket side contact 20 with which the connector apparatus of 1st embodiment is provided, the description is abbreviate | omitted. In addition, the plug-side contact 40 is configured to be vertically symmetrical with the central axis B as the axis of symmetry, and the lower shape and effects of the fitting guide 42 are the same as those on the upper side. To do.

  Similar to the plug-side contact 30 of the first embodiment, the plug-side contact 40 of the present embodiment includes a main body portion 41 having a constant thickness D and a fitting guide 42 formed on the outer surface of the tip portion. The fitting guide 42 of this embodiment includes a first contact surface 42a that contacts the first contact piece 22a of the socket-side contact 20, and a second contact surface that contacts the second contact piece 22b of the socket-side contact 20 (not shown). And have. Since the second contact surface is vertically symmetric with respect to the first contact surface 42a and the central axis B as the symmetry axis, the description thereof is omitted. The first contact surface 42a is formed of a first inclined surface 43 that is linearly inclined with respect to the central axis B at a taper angle θ3, a curved surface 45a having a radius of curvature R1, and a curved surface 45b having a radius of curvature R3. Yes. The curved surface 45a connects the tip 42aa and one end 43a of the first inclined surface 43, and the curved surface 45b connects the rear end 42ab of the fitting guide 42 and the other end 43b of the first inclined surface 43. Is connected. Both the curved surfaces 45a and 45b are formed such that the angle (taper angle θ) with respect to the central axis B continuously decreases as the distance from the tip 42aa increases.

  The fitting guide 42 of FIG. 4 includes curved surfaces 45a and 45b formed so that the taper angle θ continuously decreases in a part of the first contact surface 42a of the fitting guide 42, so that a uniform taper angle is obtained. The length is shorter than the fitting guide formed only by the inclined surface of θ3, and the length L3 is the same as the length L2 of the fitting guide 32 shown in FIG. Further, since the step is eliminated by connecting the first inclined surface 43 and the outer surface 41a of the main body portion 41 with the curved surface 45b, the first inclined surface 43 and the outer surface 41a of the first contact piece 22a can be easily inserted without being caught. Since the fitting guide 42 includes the first inclined surface 43, the height H2 of the tip 42aa of the fitting guide 42 is larger than the height H1 of the tip 32aa of the fitting guide 32 shown in FIG.

  Here, a change in the insertion force P when the plug-side contact is inserted into the socket-side contact will be described. FIG. 5 is a graph obtained by measuring a change in the insertion force P with respect to the insertion amount S when the plug-side contact 30 of the first embodiment and the plug-side contact 40 of the second embodiment are inserted into the same socket-side contact 20. It is. The insertion amount S on the horizontal axis is a distance measured from the tip 22aa of the first contact piece 22a of the socket side contact 20 to the tips 32aa and 42aa of the plug side contacts 30 and 40 along the central axis B (see FIG. 3). . A solid line indicates a change in the plug-side contact 30 according to the first embodiment, and a dotted line indicates a change in the insertion force of the plug-side contact 40 according to the second embodiment.

  The case of the plug-side contact 30 of the first embodiment will be described. When the insertion amount S is about 0.7 mm, the fitting guide 32 comes into contact with the first and second contact pieces 22a and 22b of the socket-side contact 20 to generate a contact force Pk, which corresponds to the taper angle θ. An insertion force P is generated. As the insertion proceeds, the first and second contact pieces 22a and 22b spread outward, so that the contact force Pk pressed by the first and second contact pieces 22a and 23b by the elastic force increases. However, when the taper angle θ decreases, the increase amount of the insertion force P decreases, and when the insertion amount S reaches about 1.0 mm, the peak F1 of the insertion force P is reached, and then the insertion force P starts to decrease. Yes. When the insertion amount S reaches about 1.35 mm, it reaches the rear end 32ab of the fitting guide 32 and moves to the main body portion 31 so that the taper angle θ becomes 0 degree, and the insertion force P is rubbed against the contact force Pk. It is a constant value multiplied by the coefficient μ.

  The case of the plug side contact 40 of the second embodiment will be described. When the insertion amount S is about 0.5 mm, the fitting guide 42 comes into contact with the first and second contact pieces 22a and 22b of the socket-side contact 20 to generate a contact force Pk, which corresponds to the taper angle θ. An insertion force P is generated. As can be seen from the graph, the insertion force P is generated at a point where the insertion amount is small compared to the plug-side contact 30 of the first embodiment. This is because the height H2 of the tip 42aa is the first as described above. This is because the height H1 of the tip 32aa of the plug-side contact 30 of the embodiment is higher. After the contact, as the insertion proceeds, the first and second contact pieces 22a and 22b spread outward (the flexure increases), so that the first and second contact pieces 22a and 22b are pressed by elastic force. The force Pk increases. In particular, since the plug-side contact 40 of the second embodiment has the first inclined surface 43 formed with a constant taper angle θ3, the first inclined surface 43 and the first contact piece 22a are in contact with each other. In a certain range, the insertion force P increases linearly. When the insertion amount S reaches about 1.0 mm, the insertion force P reaches the maximum value F2, and then comes into contact with the curved surface 45b, so that the insertion force P starts to decrease. When the insertion amount S reaches about 1.25 mm, it reaches the rear end 42ab of the fitting guide 42 and moves to the main body portion 41 so that the taper angle θ becomes 0 degree, and the insertion force P is rubbed against the contact force Pk. It is a constant value multiplied by the coefficient μ.

  The change in the insertion force P between the plug-side contact 30 of the first embodiment and the plug-side contact 40 of the second embodiment is compared. Looking at the maximum value F of the insertion force P, the maximum value F1 of the plug-side contact 30 of the first embodiment is lower than the maximum value F2 of the plug-side contact 40 of the second embodiment. Further, when comparing the distance T from when the insertion force P is generated until the insertion force P becomes constant, the distance T1 of the plug-side contact 30 of the first embodiment is about 0.65 mm, which is the plug side of the second embodiment. The distance T2 of the contact 40 is about 0.75 mm, and the distance T1 of the plug-side contact 30 of the first embodiment is slightly shorter. Therefore, it can be seen that the shape of the fitting guide 32 of the plug-side contact 30 of the first embodiment further reduces the insertion force P from the maximum value F, and the distance T until the insertion force P becomes constant is short.

  The plug 3 includes a plurality of plug-side contacts 30, and if the insertion force P required to insert each plug-side contact is reduced, the plug 3 is generally required according to the number of plug-side contacts. As a result, the insertion force is reduced and the plug 3 can be easily inserted. Further, the plug-side contact can be further reduced in size by reducing the length of the fitting guide while maintaining the effective fitting length of the plug-side contact. Therefore, if a plug having a plurality of such plug-side contacts is used, the connector device can be miniaturized and a connector device in which the plug insertion force is reduced can be realized.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to the drawings. The difference from the connector device of the first embodiment is the shape of the plug-side contact included in the plug, and the shape will be described below. FIG. 5 is a side view showing the shape of the plug-side contact 50 included in the plug according to the third embodiment, and shows the shape above the central axis B similarly to the plug-side contact 30 of FIG. In addition, since the socket of the connector apparatus of this embodiment and the socket side contact of the socket are the same as the socket 2 and the socket side contact 20 with which the connector apparatus of 1st embodiment is provided, the description is abbreviate | omitted. Further, the plug-side contact 50 is configured to be vertically symmetrical with the central axis B as the axis of symmetry, and the shape of the lower side of the fitting guide 52 and the effect thereof are the same as those of the upper side. To do.

  Similar to the plug-side contact 50 of the first embodiment, the plug-side contact 50 of the present embodiment includes a main body portion 51 having a constant thickness D and a fitting guide 52 formed on the outer surface of the tip portion. The fitting guide 52 of the present embodiment includes a first contact surface 52a that contacts the first contact piece 22a of the socket side contact 20, and a second contact surface that contacts the second contact piece 22b of the socket side contact 20 (not shown). And have. Since the second contact surface is vertically symmetric with respect to the first contact surface 52a and the central axis B as the symmetry axis, description thereof is omitted.

  The fitting guide 52 of the plug-side contact 50 gradually increases in angle (taper angle θ) with respect to the center axis B as it moves away from the tip 52aa along the center axis B from the front end 52aa to the rear end 52ab. It is formed by two decreasing slopes, the first inclined surface 53a and the second inclined surface 53b. Specifically, the first contact surface 52a of the fitting guide 52 includes a first inclined surface 53a that is linearly inclined with respect to the central axis B at a taper angle θ4 and a second inclined surface that is linearly inclined with a taper angle θ5. The inclined surface 53b, a curved surface 55a having a radius of curvature R1, and a curved surface 55b having a radius of curvature R4 are formed. The curved surface 55a connects the tip 52aa and one end 56a of the first inclined surface 53a, and the curved surface 55b is the other end 56b of the first inclined surface 53a and one end of the second inclined surface 53b. 56c is connected. Further, the curved surfaces 55a and 55b are formed such that the angle with respect to the central axis B (taper angle θ) continuously decreases as the distance from the tip 42aa increases.

  If the fitting guide 52 is formed like the plug-side contact 50 of the present embodiment, the portion near the tip of the fitting guide 52 is inclined at a relatively large taper angle θ4. L4 is shorter than the case where it is formed with a conventional constant taper angle. Further, since the second inclined portion 53b that is inclined at a relatively small taper angle θ5 is formed at a point where the insertion is advanced and the contact force with the socket-side contact 20 is increased, the insertion force can be reduced. . Further, the first contact surface 52 a has a curved surface 55 b that smoothly connects the first inclined surface 53 a and the second inclined surface 53 b, so that the plug-side contact 50 is connected to the first contact piece 22 a of the socket-side contact 20. It can be inserted smoothly without being caught.

  The embodiment has been described with reference to the accompanying drawings. As a means for reducing the insertion force of the plug side contact, the present invention provides a taper angle of the fitting guide at the initial stage of insertion where the elastic deformation of the first contact piece and the second contact piece of the socket side contact is small and the contact force is small. The insertion force is reduced by reducing the taper angle at the portion where the elastic deformation of the first contact piece and the second contact piece increases and the contact force increases. In the first embodiment, a plug-side contact having a fitting guide whose angle continuously decreases using curved surfaces having a plurality of curvature radii has been proposed, but the fitting guide is a curved surface represented by another method, for example, a longitudinal section thereof. You may form so that a taper angle may reduce continuously using the curved surface by which a surface is represented by a quadratic curve.

  In the present embodiment, the plug-side contact formed vertically symmetrically with the central axis B as the axis of symmetry has been described. However, the plug-side contact does not necessarily have to be vertically symmetrical, either on the upper side or the lower side. The fitting guide may include a curved surface in which the angle with respect to the axis continuously decreases, or a plurality of inclined surfaces in which the angle with respect to the axis decreases gradually. Further, the fitting guide may be formed by a combination thereof.

  If the plug-side contact having the fitting guide described above is used, the insertion force when the plug-side contact is inserted into the socket-side contact can be suppressed or reduced. Therefore, it is possible to suppress an insertion force required when inserting a plug having a plurality of plug-side contacts into the socket. Further, since the plug-side contact fitting guide can be shortened, the plug itself can be reduced in size while ensuring the effective fitting length of the plug-side contact, and the connector device can be reduced in size by using the plug. Can be

DESCRIPTION OF SYMBOLS 1 Connector apparatus 2 Socket 3 Plug 20 Socket side contact 21 Receiving part 22a 1st contact piece 22b 2nd contact piece 30,40,50 Plug side contact 31,41,51 Main-body part 32,42,52 Fitting guide 33,43 , 53 First contact surface 34 Second contact surface

Claims (6)

A plug having a plug-side contact having a longitudinal axis and having a fitting guide on the outer surface of the tip portion,
The plug, wherein the fitting guide includes a curved surface in which an angle with respect to the axis continuously decreases as the distance from the tip of the plug-side contact increases along the axis. A plug having a plug-side contact having a longitudinal axis and having a fitting guide on the outer surface of the tip portion,
The plug, wherein the fitting guide includes a plurality of inclined surfaces whose angles with respect to the axis gradually decrease as the distance from the tip of the plug-side contact increases along the axis.   The plug according to claim 2, wherein the plurality of inclined surfaces are smoothly connected by a curved surface. A connector device comprising: a plug having a plug-side contact having a longitudinal axis and having a fitting guide on an outer surface of a tip portion; and a socket having a socket-side contact having a receiving portion for receiving the plug-side contact. Because
The receiving portion of the socket-side contact includes an elastically displaceable first contact piece and a second contact piece that sandwich the plug-side contact;
The fitting guide of the plug side contact has a first contact surface that contacts the first contact piece of the socket side contact and a second contact surface that contacts the second contact piece,
At least one of the first contact surface and the second contact surface of the fitting guide includes a curved surface whose angle with respect to the axis continuously decreases as the distance from the tip of the plug-side contact increases along the axis. A connector device characterized by that. A connector device comprising: a plug having a plug-side contact having a longitudinal axis and having a fitting guide on an outer surface of a tip portion; and a socket having a socket-side contact having a receiving portion for receiving the plug-side contact. Because
The receiving portion of the socket-side contact includes an elastically displaceable first contact piece and a second contact piece that sandwich the plug-side contact;
The fitting guide of the plug side contact has a first contact surface that contacts the first contact piece of the socket side contact and a second contact surface that contacts the second contact piece,
At least one of the first contact surface and the second contact surface of the fitting guide has a plurality of inclined surfaces whose angles with respect to the axis decrease stepwise as they move away from the tip of the plug-side contact along the axis. A connector device comprising:   The connector device according to claim 5, wherein the plurality of inclined surfaces are smoothly connected by a curved surface.

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