JP3210712U - Connector - Google Patents

Abstract

Provided is a connector that can be stably disengaged with a predetermined force. A plug 12 includes a leg portion 22 protruding from a base portion 16 and an engaging portion 24 formed on the leg portion. The socket includes an accommodating portion that accommodates the leg portion 22 and an engaged portion that is formed in the accommodating portion and engages with the engaging portion 24. The engaging portion and the engaged portion have contact surfaces that can engage with each other. The engaging portion or the contact surface of the engaged portion is not formed on the engaging portion of the plug and the engaged portion of the socket, and does not contact each other in the engaged state of the engaging portion and the engaged portion. Has a part. At least one of the contact surfaces of the contact portion 25 of the engagement portion and the contact surface of the engaged portion in the engaged state between the engagement portion and the engaged portion is relative to the protruding direction of the leg portion 22. It is formed on the surface inclined outward. [Selection] Figure 1

Description

  The present invention relates to a connector such as a buckle that includes a plug and a socket and can be connected to and disconnected from each other.

  Conventionally, a buckle has been used as a connector for detachably connecting two objects to be connected such as an end portion of a tape or a string-like member. The buckle includes a plug and a socket into which the plug is inserted and engaged. The plug includes a plug body and a pair of legs formed in parallel to each other on both sides of the plug body. Each leg is formed with an operating piece and an engaging portion. The socket includes a socket body and an insertion hole formed in the socket body and into which a plug is inserted. In the insertion hole, a guide part that abuts the leg part and elastically displaces the leg parts to each other, an engaged part that engages with the engaging part of the leg part, and an opening that exposes the operation piece of the leg part Each part is formed.

  In such a connecting device such as a buckle, for example, when it is used for connecting a string body that is lowered from clothes or a neck, there is a possibility that the string may be caught by something and the neck may be squeezed. Therefore, as a connector for which safety measures have been taken in such a case, there has been a connector that can be disconnected with a force of a certain level or more as disclosed in Patent Document 1, for example. The connector disclosed in Patent Document 1 has the same configuration as the above-described buckle, and a contact portion between the engaging portion of the plug and the engaged portion of the socket is formed on the inclined surface. As a result, when a force is applied in the direction in which the plug and socket are pulled apart, the leg is elastically deformed by the component force of the force acting on the inclined surface, and the connection is released when a force exceeding a certain level is applied to restrict the neck. It is possible to ensure safety.

  Furthermore, there exists a coupling tool currently disclosed by patent document 2 as a coupling tool in which the safety measure was taken. This connector is composed of a plug and a socket having the same configuration as the above-described buckle, and has an engaging portion formed on a leg protruding from the base of the plug, and the socket has a receiving portion for receiving the leg. And an engaged portion with which the engaging portion engages. The leg portion is formed at a position different from the first elastic deformation portion that is elastically deformed by the disengagement operation with the operation piece, and is separated from each other in a connected state of the plug and the socket. A second elastic deformation portion is provided that is elastically deformed so that the engagement between the engagement portion and the engaged portion is released when a load is applied in a direction at a certain load or more.

Utility Model Registration No. 3086720 International Publication No. WO2014 / 103009

  In the case of the structure of the connector disclosed in Patent Document 1, when the engagement between the engaging portion and the engaged portion is released due to external tension or the like without operating the plug's leg portion, The bending part is the same as the bending part of the leg part when the plug is inserted, and the bending part of the leg part when pressing the operation piece of the leg part to release the connection. For this reason, in order to release the engagement by bending the leg portion by the force in the pulling direction for safety, at least one of the contact surfaces of the engaging portion and the engaged portion at the contact position is The structure has to be greatly inclined with respect to the drawing direction, and the engagement may be inadvertently released in use. Therefore, in order to increase the pulling force when the engagement is released to some extent, the inclination angle at the contact position of the contact surface between the engaging portion and the engaged portion is made to approach a right angle with respect to the pulling direction. Must be set. However, in the case of the structure set in such a manner, the elastic deformation of the leg portion is difficult to be smoothly performed at the time of disengagement when an inadvertent force is applied. The engaged portion may be damaged and cannot be reused.

  Also, in the case of the connector disclosed in Patent Document 2, in order to release the engagement in a state where the connector is not damaged, in the pulling direction at the contact position of the contact surface between the engaging portion and the engaged portion. On the other hand, it must be set to a shape having an inclination angle, it is difficult to set the elastic modulus and inclination angle of the second elastic deformation part, and the force for releasing the engagement varies, and it is stable with a constant force. There was a problem that the engagement was not released.

  The present invention has been made in view of the above-described problems of the background art, and an object thereof is to provide a connector that can be stably disengaged with a predetermined force.

  The present invention is a coupling tool including a plug and a socket, which are provided so as to be connected to and disconnected from each other, each having a mounting portion to be attached to a different mounting member, and a leg portion protruding from a base portion of the plug, An engaging portion formed on a leg portion, and the socket includes an accommodating portion that accommodates the leg portion, and an engaged portion that is formed in the accommodating portion and engages with the engaging portion, The engaging portion and the engaged portion have contact surfaces that can be engaged with each other, and the engaging portion is formed on a part of the engaged portion of the plug and the engaged portion of the socket. Alternatively, the contact surface of the engaged portion is not formed, and has a portion that does not contact each other in an engaged state of the engaging portion and the engaged portion, and the engagement portion and the engaged portion In the engaged state, the abutting surface of the engaging portion and the abutting surface of the engaged portion are in contact with each other At least one of, with respect to the projecting direction of the leg portion, a connector that is formed on a surface which is inclined outwardly.

  The engaging portion and the engaged portion that can form the abutting surface are provided at four locations, and the abutting surface is provided so as to be engageable at three of the four engaging locations. It is what. In particular, it is preferable that at least one of the contact surfaces is provided symmetrically with respect to the center of the leg in the protruding direction.

  Moreover, the contact surface which engages with the said to-be-engaged part is good in three places of the front-back direction of the said engaging part of a pair of said leg part of the said plug. Or the said contact surface of the said to-be-engaged part may be provided in three places of the front-and-back direction of the to-be-engaged part of the said socket.

  The buckle of this device can accurately set the force for releasing the engagement, and the engagement releasing operation when an inadvertent force is applied is stably performed. Moreover, a predetermined engagement force can be set depending on the number of engagement locations, and a sufficient engagement force and stable engagement release can be satisfied at the same time. Moreover, even when the engagement is inadvertently released, the leg portion or the like is not damaged, and a connector having high durability can be provided.

It is the perspective view (a) of the plug of the buckle of 1st embodiment of this invention, and the partial expansion perspective view (b) of the leg part of a plug. It is the top view (a) of the plug of the buckle of 1st embodiment, and the partial enlarged plan view (b) of the leg part of a plug. It is a left view of the plug of the buckle of 1st embodiment. It is a right view of the plug of the buckle of 1st embodiment. It is a front view of the plug of the buckle of 1st embodiment. It is a top view of the socket of the buckle of 1st embodiment. It is AA sectional drawing of FIG. It is a socket left view of the buckle of a first embodiment. It is BB sectional drawing of FIG. It is a top view of the connection state of the buckle of a first embodiment. It is CC sectional drawing of FIG. It is a bottom view of the connection state of the buckle of a first embodiment. It is a perspective view of the plug of the buckle of 2nd embodiment of this invention. It is a top view of the plug of the buckle of 2nd embodiment. It is a top view of the socket of the buckle of 2nd embodiment. It is DD sectional drawing of FIG. It is a socket left view of the buckle of 2nd embodiment. It is EE sectional drawing of FIG. It is a top view of the connection state of the buckle of 2nd embodiment. It is FF sectional drawing of FIG.

  Hereinafter, the buckle 10 of the first embodiment of the connector of the present invention will be described with reference to FIGS. The buckle 10 of this embodiment includes a plug 12 and a socket 14 that are separately attached to various attachment members (not shown). The member to be attached is a belt or tape such as a bag, the end of a string body, a member such as a bag itself, etc. The attachment method is to insert a string or tape, and to use a screw or rivet It may be fixed to. The plug 12 and the socket 14 are integrally formed of a synthetic resin such as polyacetal, polyamide, or polypropylene, and the plug 12 is inserted into the socket 14 and connected to each other.

  As shown in FIGS. 1 to 5, the plug 12 is provided with a pair of leg portions 22 that protrude substantially parallel from both sides of the base portion 16 and are formed symmetrically with respect to each other about the central axis in the protruding direction. A first elastic deformation portion 23 having a small thickness in the X-axis direction is formed on the base end portion 22a of each leg portion 22 in order to make elastic deformation relatively easy. An engaging portion 24 is formed at the distal end portion 22b of each leg portion 22 to be engaged with and engaged with an engaged portion 34 described later of the socket 14. In the following description, the direction in which the pair of leg portions 22 of the plug 12 face each other is the X-axis direction, which is also referred to as the left-right direction. The insertion direction of the plug 12 and the socket 14 is the Y-axis direction, and is also referred to as the protruding direction of the leg portion 22. The direction orthogonal to the left-right direction and the front-rear direction is the Z-axis direction, and is also referred to as the front and back direction of the plug 12 and the socket 14.

  The leg portion 22 extends in the Y-axis direction, has a constant width in the Z-axis direction from the proximal end portion 22a, and reaches the distal end portion 22b. As for the engaging part 24 provided in the leg part 22, protrusion 24a, 24b, 24c is provided in three places front and back among four places of the front and back of each front-end | tip part 22b of a pair of leg part 22. FIG. One of the engaging portions 24 of the leg portion 22 where no protrusion is formed is a cut portion 24e formed flat. Therefore, the width in the Z-axis direction of the distal end portion 22b of the leg portion 22 provided with the cut portion 24e is narrower than the width in the Z-axis direction of the distal end portion 22b of the other leg portion 22. In the three projecting portions 24a, 24b, and 24c, the portions facing the base end portion 22a side of the pair of leg portions 22 face a contact surface 35 of the engaged portion 34 of the socket 14 described later, and It is formed as a contact surface 25 that is a contact portion. The contact surfaces 25 are formed as surfaces slightly inclined from the right angle with respect to the protruding direction of the leg portions 22, and the contact surfaces 25 of the pair of engagement portions 24 are laterally directed toward the distal end portions 22 b. It is provided so as to be inclined outward. The inclination angle is appropriately set. For example, about 3 ° to 6 °, and preferably 10 ° or less. The outer surface of the tip 22b of each leg 22 is formed as a curved surface that swells toward the tip.

  A portion of the engagement portion 24 located on the base end portion 22a side is formed as a second elastic deformation portion 26 having a small thickness in the X-axis direction in order to make elastic deformation relatively easy. Similar to the first elastic deformation portion 23, the second elastic deformation portion 26 is a portion that is easily elastically deformed in the X-axis direction, and an elastic coefficient in the bending direction is appropriately set according to the application. Between the first elastic deformation part 23 and the second elastic deformation part 26, an operation part 27 slightly swelled in the X-axis direction is formed.

  An attachment portion 28 such as a belt to be connected is provided at an edge of the base portion 16 of the plug 12, and attachment holes 28 a and 28 b such as a belt are formed in the attachment portion 28 in parallel so that the length of the belt can be adjusted. Has been. In addition, a guide portion 29 protrudes from the central portion of the base portion 16 in parallel with the leg portion 22 in the protruding direction.

  As shown in FIGS. 6 to 9, the socket 14 is formed with an accommodating portion 32 having an insertion port 32 a into which the leg portion 22 of the plug 12 is inserted when the plug 12 and the socket 14 are engaged. . The accommodating portion 32 accommodates the leg portion 22 in the accommodating portion 32 when the plug 12 and the socket 14 are engaged. An engaged portion 34 that engages with the pair of engaging portions 24 of the plug 12 is provided on the inner surface of the accommodating portion 32. The engaged portion 34 is provided in the housing portion 32 on the opposite side to the insertion port 32a in the Y-axis direction, and faces the Z-axis direction, which is the front and back direction, of the front surface 14a and the back surface 14b of the socket 14. It is formed in the inner accommodating portion 32. Furthermore, the engaged portions 34 are provided symmetrically with respect to the center line in the Y-axis direction, and two engaged pairs 34 of front and back are integrally formed in the socket 14. The two pairs of engaged portions 34 are provided so as to be able to engage with the three projecting portions 24a, 24b, 24c of the respective engaging portions 24 of the plug 12 and to be engaged with the cutout portions 24e of the plug 12. Is formed in a shape that does not contact any of the engaged portions 34. Of the two pairs of engaged portions 34, a portion that can be brought into contact with the engaging portion 24 is a contact surface 35 that is a portion that can be engaged with each other while facing each contact surface 25 of the engaging portion 24. It becomes. Accordingly, of the two pairs of engaged portions 34, the abutting portions with the engaging portion 24 are the three locations facing the abutting surfaces 25 of the three protrusions 24 a, 24 b, and 24 c of the engaging portion 24. This is a contact surface 35.

  The contact surface 35 is inclined outward and in the direction with respect to a surface perpendicular to the Y-axis direction, similarly to the inclination direction of the engaging portion 24 of each leg portion 22. The inclination angle is, for example, about 3 ° to 6 °, and preferably 10 ° or less. Each engaged portion 34 is provided with a guide surface 34a continuous from the contact surface 35 toward the insertion port 32a. The guide surface 34a of the engaged portion 34 is formed on a surface inclined so as to slightly spread outward in the X-axis direction toward the insertion port 32a with respect to the Y-axis direction, and the engaging portion 24 of the plug 12 is formed. Forms a guide surface when inserted into and engaged with the engaged portion 34 of the socket 14.

  On both side surfaces in the X-axis direction of the socket 14, a pair of operation openings 37 are formed so that each operation portion 27 is exposed to the outside in a state where the engagement portion 24 is engaged with the engaged portion 34. . The peripheral edge of the operation opening 37 is formed in a shape gradually recessed toward the center toward the center of the operation portion 27 of the leg portion 22 in the insertion direction. Further, the end portion 32b on the back surface 14b side of the socket 14 is formed with an opening 36 formed in a concave shape in the Y-axis direction. An attachment portion 38 through which a belt or the like is inserted is provided on the end 32b side of the socket 14 opposite to the insertion port 32a, and an attachment hole 38a is formed in the attachment portion 38.

  As shown in FIG. 9, a guide groove 39 is formed on the inner surfaces of the front and back surfaces of the housing portion 32 of the socket 14 in the Z-axis direction from the insertion port 32 a toward the end portion 32 b side. Is formed. The guide portion 29 of the plug 12 is fitted into the guide groove 39 to guide insertion in the Y-axis direction.

  Next, the usage method and function of the buckle 10 according to the first embodiment of the present invention will be described. First, when connecting the plug 12 and the socket 14, the leg portion 22 of the plug 12 is inserted into the accommodating portion 32 from the insertion port 32 a of the socket 14 from the state shown in FIGS. 2 and 6. As a result, the distal end portion 22 b of the leg portion 22 comes into contact with the guide surface 34 a of the engaged portion 34 in the accommodating portion 32 of the socket 14. Then, as the plug 12 is pushed in, the pair of leg portions 22 are temporarily deformed inward from each other by the first elastic deformation portion 23 and the second elastic deformation portion 26, and the pair of engaging portions 24 are paired. Passes between the engaged portions 34. Here, the displacement of the elastic deformation is large in the first elastic deformation portion 23. When the contact surface 25 of the engaging portion 24 passes between the contact surfaces 35 of the engaged portion 34 in the Y-axis direction, the elastic deformation of the first elastic deformation portion 23 of the leg portion 22 is restored. The leg portions 22 return to their original positions on the outside. As a result, as shown in FIGS. 10 to 12, the contact surfaces 25, 35 face each other and come into contact with each other, and engage with each other on a surface slightly inclined with respect to the insertion direction of the leg portion 22. At this time, the protrusions 24 a, 24 b and 24 c of the engaging portion 24 of the leg portion 22 are engaged with the engaged portions 34 in the connected state of the plug 12 and the socket 14.

  When the connection between the plug 12 and the socket 14 is released, the first elastic deformation portion 23 is pressed by pressing the operation portion 27 of the plug 12 exposed from the operation openings 37 on both sides of the socket 14 inward from both sides. Due to elastic deformation, the contact surface 25 of the engaging portion 24 is separated from the contact surface 35 of the engaged portion 34 in the inner direction, and the plug 12 can be pulled out from the socket 14.

  Next, a description will be given of an engagement releasing operation when an external tension is inadvertently applied to a member to be attached such as a string body connected by the buckle 10 of this embodiment. When a force in a direction in which the plug 12 and the socket 14 are pulled apart from each other is applied to the buckle 10, the force acts on the contact surface 25 of the engaging portion 24 and the contact surface 35 of the engaged portion 34. At the contact surfaces 25 and 35, the force in the Y-axis direction that attempts to separate the plug 12 and the socket 14 is in the surface direction of the contact surfaces 25 and 35 that are slightly inclined with respect to the Y-axis direction. A static frictional force due to the component force and the component force acting at right angles to the contact surfaces 25 and 35 acts. Further, each second elastic deformation portion 26 of the pair of leg portions 22 of the plug 12 is elastically deformed in a direction approaching each other by a component force acting at right angles to the contact surface 25, and the Y-axis direction of the contact surfaces 25, 35. And the static frictional force acting between the contact surfaces 25 and 35 is reduced. Further, the contact positions of the contact surfaces 25 and 35 and the center of the second elastic deformation portion 26 of the leg portion 22 where the force in the Y-axis direction acts are shifted in the X-axis direction. A moment in a direction in which the inclination angle with respect to the Y-axis direction becomes smaller also acts on 25. As a result, the component force in the direction parallel to the contact surfaces 25 and 35 is relatively increased, and slippage occurs between the contact surfaces 25 and 35. Further, the elastic deformation of each second elastic deformation portion 26 and the bending of the first elastic deformation portion 23 are also added, and the contact surface 25 of the engagement portion 24 finally slides on the contact surface 35 of the engaged portion 34. Thus, the engaging portion 24 is disengaged from the engaged portion 34.

  At this time, in the buckle 10 of this embodiment, the contact surfaces 25 of the three protrusions 24a, 24b, and 24c of the pair of engaging portions 24 of the leg portion 22 are engaged with the socket 14 at three locations. As shown in FIG. 11 and the like, the abutment portion 24e faces the other abutment surface 35 of the engaged portion 34 so that there is no contact between the surfaces. . Therefore, the contact area by the protrusion of the engaging part 24 is reduced to 3 instead of 4 as in the conventional buckle, and the contact area is reduced. As a result, the sum of the actual static frictional forces acting between the contact surfaces 25 and 35 is reduced, and the force in the Y-axis direction where slippage between the contact surfaces 25 and 35 begins to occur is also reduced. The force required to separate 12 and socket 14 is also reduced. Furthermore, it can design so that it may isolate | separate with the stable fixed force by setting the inclination-angle of the contact surfaces 25 and 35 appropriately. The first elastically deforming portion 23 also has a direction of action between the centers of the contact surfaces 25 and 35 and the center of the first elastically deforming portion 23 in the Y-axis direction that is shifted in the X-axis direction, so that the buckle 10 When a force is applied, a moment is also generated in the first elastic deformation portion 23, but in a direction opposite to the moment caused by the second elastic deformation portion 26 and the contact surfaces 25 and 35, the moment in the direction of maintaining the engaged state. Yes, it does not act in the direction of releasing the connection between the engaging portion 24 and the engaged portion 34.

  According to the buckle 10 of this embodiment, the conditions under which the buckle 10 is disengaged by an external force are mainly the elastic coefficient of the second elastic deformation portion 26, the inclination angles of the contact surfaces 25 and 35, and This depends on the number of engagement points between the protrusions 24a, 24b, 24c of the engagement part 24 and the engaged part 34. In particular, the engagement points of the protrusions 24a, 24b, 24c and the engaged part 34 are different from those of the conventional part. By changing from four places to three places, the connection can be stably released with a smaller force. In particular, in order to facilitate the release of the buckle 10, when the engagement force is adjusted by the elastic coefficient of the second elastic deformation portion 26 and the inclination angles of the contact surfaces 25 and 35, the engagement portion 24 and the engaged portion are engaged. The engaging force of the portion 34 becomes unstable, and a stable connection state cannot be obtained. On the other hand, as described above, the contact portion between the engagement portion 24 and the engaged portion 34 is changed from four to three, and the contact area between the contact surfaces 25 and 35 is reduced, thereby engaging the engagement. When the detaching force is reduced, the variation in the force capable of releasing the connection is reduced, and a stable connection releasing force can be set. For example, when there are four engagement points due to contact of the contact surfaces 25 and 35 and the force necessary for releasing the connection is 140 N, the connection of the buckle 10 can be stably connected at 100 N by setting the engagement points to three. Can be released. In addition, the deformation of the second elastic deformation portion 26 and the like is a deformation within the elastic limit, and is durable against disengagement due to repeated pulling and does not cause partial damage. It can be maintained for a long time.

  Next, the buckle 40 of 2nd embodiment of the coupling device of this invention is demonstrated based on FIGS. Here, the same members as those in the above embodiment are denoted by the same reference numerals and will be briefly described. The buckle 40 of this embodiment is also used in the same manner as the buckle 10 of the above-described embodiment, and is used by being attached to a belt, a tape, a string body, an end portion of another attached member, or the like (not shown). .

  As shown in FIGS. 13 and 14, the plug 12 of this embodiment also protrudes from both sides of the base portion 16 in substantially the same manner as in the above embodiment, and is a pair of symmetrically formed with the central axis in the protruding direction. Legs 22 are provided. A first elastic deformation portion 23 having a small thickness in the X-axis direction is formed at the base end portion 22a of each leg portion 22. An engaging portion 24 is formed at the distal end portion 22b of each leg portion 22 to be engaged with and engaged with an engaged portion 34 described later of the socket 14.

  The leg portion 22 extends in the Y-axis direction, has a constant width in the Z-axis direction from the proximal end portion 22a, and reaches the distal end portion 22b. As for the engaging part 24 provided in the leg part 22, protrusion 24a, 24b, 24c, 24d is provided in the front and back four places of each front-end | tip part 22b of a pair of leg part 22. FIG. In the four projecting portions 24a, 24b, 24c, and 24d, each portion facing the base end portion 22a side of the pair of leg portions 22 is formed as a contact surface 25 with respect to the engaged portion 34 of the socket 14 described later. Yes. The contact surface 25 is formed in a surface slightly inclined from the right angle with respect to the protruding direction of the leg portion 22, and each contact surface 25 of the pair of engagement portions 24 is the tip portion as in the above embodiment. It is provided so as to be inclined outward in the left-right direction toward 22b.

  A portion of the engagement portion 24 located on the base end portion 22a side is formed as a second elastic deformation portion 26 having a small thickness in the X-axis direction in order to make elastic deformation relatively easy. Between the first elastic deformation part 23 and the second elastic deformation part 26, an operation part 27 slightly swelled in the X-axis direction is formed.

  An attachment portion 28 such as a belt to be connected is provided at an edge of the base portion 16 of the plug 12, and attachment holes 28 a and 28 b such as a belt are formed in the attachment portion 28 in parallel so that the length of the belt can be adjusted. Has been. In addition, a guide portion 29 protrudes from the central portion of the base portion 16 in parallel with the leg portion 22 in the protruding direction.

  As shown in FIGS. 15 to 18, the socket 14 is formed with an accommodating portion 32 having an insertion port 32 a into which the leg portion 22 of the plug 12 is inserted. An engaged portion 34 that engages with the pair of engaging portions 24 of the plug 12 is provided on the inner surface of the accommodating portion 32. The engaged portion 34 is provided in the housing portion 32 on the opposite side to the insertion port 32a in the Y-axis direction, and faces the Z-axis direction, which is the front and back direction, of the front surface 14a and the back surface 14b of the socket 14. It is formed in the inner accommodating portion 32. The engaged portion 34 on the surface 14a side of the socket 14 is provided symmetrically with respect to the center line in the Y-axis direction. The engaged portion 34 on the back surface 14b side of the socket 14 is provided only on one side across the center line in the Y-axis direction, and is a flat surface 34c in which no engaged portion is formed at the other symmetrical position. ing. The flat surface 34 c is formed flush with the inner peripheral surface of the housing portion 32. The three engaged portions 34 are provided so as to be able to engage with the three protruding portions 24a, 24b, and 24d of the respective engaging portions 24 of the plug 12 so that the other protruding portion 24c of the plug 12 can be engaged. No engageable part is provided. The three engaged portions 34 have contact surfaces 35 that engage with the contact surfaces 25 of the three protrusions 24a, 24b, and 24d of the engagement portion 24, respectively. The contact surface 35 is inclined outward and in the direction with respect to a surface perpendicular to the Y-axis direction, similarly to the inclination direction of the engaging portion 24 of each leg portion 22. Each engaged portion 34 is provided with a guide surface 34a continuous from the contact surface 35 toward the insertion port 32a. The guide surface 34a of the engaged portion 34 is formed on a surface inclined so as to slightly spread outward in the X-axis direction toward the insertion port 32a with respect to the Y-axis direction, and the engaging portion 24 of the plug 12 is formed. Forms a guide surface when inserted into and engaged with the engaged portion 34 of the socket 14.

  On both side surfaces of the socket 14 in the X-axis direction, a pair of operation openings 37 are formed so that each operation piece 27 is exposed to the outside in a state where the engagement portion 24 is engaged with the engaged portion 34. . Further, the end portion 32b on the back surface 14b side of the socket 14 is formed with an opening 36 formed in a concave shape in the Y-axis direction. An attachment portion 38 through which a belt or the like is inserted is provided on the end 32b side of the socket 14 opposite to the insertion port 32a, and an attachment hole 38a is formed in the attachment portion 38.

  As shown in FIG. 18, a guide groove 39 is formed on the inner surface of the front and back surfaces of the housing portion 32 of the socket 14 in the Z-axis direction from the insertion port 32a toward the end portion 32b. Is formed. The guide portion 29 of the plug 12 is fitted into the guide groove 39 to guide insertion in the Y-axis direction.

  Next, the usage method and function of the buckle 40 of the second embodiment of the present invention will be described. First, when the plug 12 and the socket 14 are connected, the leg portion 22 of the plug 12 is inserted into the accommodating portion 32 from the insertion port 32a of the socket 14 from the state shown in FIGS. And connect. As a result, as shown in FIGS. 10 to 12, the contact surfaces 25, 35 face each other and come into contact with each other, and engage with each other on a surface slightly inclined with respect to the insertion direction of the leg portion 22. At this time, in a connected state of the plug 12 and the socket 14, the three protrusions 24 a, 24 b, 24 d of the engaging portion 24 of the leg portion 22 are engaged with the three engaged portions 34.

  When the connection between the plug 12 and the socket 14 is released, the first elastic deformation portion 23 is pressed by pressing the operation pieces 27 of the plug 12 exposed from the operation openings 37 on both sides of the socket 14 inward from both sides. Due to elastic deformation, the contact surface 25 of the engaging portion 24 is separated from the contact surface 35 of the engaged portion 34 in the inner direction, and the plug 12 can be pulled out from the socket 14.

  Next, a description will be given of the disengagement operation when the external tension is inadvertently applied to the connecting member such as the string body connected by the buckle 40 of this embodiment. When a force in a direction in which the plug 12 and the socket 14 are pulled apart from each other is applied to the buckle 40, the force acts on the contact surface 25 of the engaging portion 24 and the contact surface 35 of the engaged portion 34. At the contact surfaces 25 and 35, the force in the Y-axis direction that attempts to separate the plug 12 and the socket 14 is in the surface direction of the contact surfaces 25 and 35 that are slightly inclined with respect to the Y-axis direction. A static frictional force due to the component force and the component force acting at right angles to the contact surfaces 25 and 35 acts. Similarly to the above-described embodiment, when the component force in the surface direction of the contact surfaces 25 and 35 relatively increases, slip occurs between the contact surfaces 25 and 35, and the elastic deformation of each second elastic deformation portion 26 occurs. Further, the bending of the first elastic deformation portion 23 is also added, and finally the abutment surface 25 of the engagement portion 24 slides on the abutment surface 35 of the engagement portion 34 so that the engagement portion 24 becomes the engagement portion 34. Deviate from.

  At this time, in the buckle 40 of this embodiment, the contact surfaces 25 of the three projecting portions 24a, 24b, and 24d of the pair of engaging portions 24 of the leg portion 22 are engaged with the socket 14 at three locations. As shown in FIGS. 18 and 20, a flat surface 34c is formed at the other portion of the engaged portion 34 to contact the protrusion 24c of the plug 12 as shown in FIGS. And there is no engagement. Therefore, the contact area by the protrusion of the engaging part 24 is reduced to 3 instead of 4 as in the conventional buckle, and the contact area is reduced. As a result, the sum of the actual static frictional forces acting between the contact surfaces 25 and 35 is also reduced, and the force in the Y-axis direction where slippage between the contact surfaces 25 and 35 begins to occur is also reduced. The force required to separate 12 and socket 14 is also reduced. Furthermore, it can design so that it may isolate | separate with the stable fixed force by setting the inclination-angle of the contact surfaces 25 and 35 appropriately.

  According to the buckle 40 of this embodiment, the conditions under which the buckle 40 is disengaged by an external force are mainly the elastic coefficient of the second elastic deformation portion 26, the inclination angles of the contact surfaces 25 and 35, and It depends on the number of engaging portions of the protrusions 24a, 24b, 24c and the engaged portion 34 of the engaging portion 24, and the protrusions 24a, 24b, 24c and the engaged portion 34 are similar to the above embodiment. By changing the engagement locations from the conventional 4 locations to 3 locations, the connection can be stably released with a smaller force.

  In addition, the coupling tool of this invention is not limited to said each embodiment, A material other than resin and the composite material of resin and a metal may be sufficient. The number of engagement points between the engagement portion and the engaged portion may be two in addition to four, and the engagement points may be line-symmetric or point-symmetric with respect to the center in the Y-axis direction. Good to be located. Further, only one of the first elastic deformation portion and the second elastic deformation portion may be provided, and the structure of the leg portion can be appropriately set. Can be set arbitrarily. Further, the operation unit and the connected member can be selected as appropriate.

10, 40 Buckle 12 Plug 14 Socket 16 Base part 22 Leg part 24 Engagement part 24a, 24b, 24c, 24d Projection part 24e Cutting part 25, 35 Contact surface 23 1st elastic deformation part 26 2nd elastic deformation part 27 Operation part 28, 38 attachment portion 32 accommodation portion 32 a insertion port 34 engaged portion

Claims (6)

In a connector comprising a plug (12) and a socket (14), which are provided so as to be connected to and disconnected from each other and each have an attachment portion (28, 38) attached to a different attached member.
A leg (22) protruding from the base (16) of the plug (12), and an engaging part (24) formed on the leg (22);
The socket (14) has an accommodating portion (32) for accommodating the leg portion (22), and an engaged portion formed in the accommodating portion (32) and engaged with the engaging portion (24). 34)
The engaging portion (24) and the engaged portion (34) have contact surfaces (25, 35) that can be engaged with each other,
The engaging portion (24) or the engaged portion (34) of the plug (12) is part of the engaged portion (24) of the plug (12) and the engaged portion (34) of the socket (14). The contact surfaces (25, 35) are not formed, and have portions that do not contact each other in the engaged state of the engaging portion (24) and the engaged portion (34),
The abutting surface (25) of the engaging portion (24) and the abutting surface (34) of the engaged portion (34) in the engaged state of the engaging portion (24) and the engaged portion (34). 35) At least one of the contact portions of 35) is formed on a surface inclined outward with respect to the protruding direction of the leg portion (22).   The coupling tool according to claim 1, wherein the engaging portion (24) and the engaged portion (34) capable of forming the contact surface (25, 35) are provided at four locations.   The coupling tool according to claim 2, wherein the contact surface (25, 35) is provided to be engageable at three of the four engagement locations.   The connection tool according to claim 1, 2 or 3, wherein the contact surface (25, 35) is provided at least one position symmetrically with respect to the center of the leg portion (22) in the protruding direction.   Abutting surfaces (25) that engage with the engaged portion (34) are provided at three positions in the front and back direction of the engaging portion (24) of the pair of leg portions (22) of the plug (12). The coupling tool according to claim 3.   The coupling tool according to claim 3, wherein the contact surfaces (35) of the engaged portion (34) are provided at three positions in the front and back direction of the engaged portion (34) of the socket (14). .

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