JP5976844B2 - Connector - Google Patents

Description

  The present invention relates to a connecting tool such as a buckle which is composed of a male member and a female member 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 of a string-like member. This buckle is comprised from the plug which is a male member, and the socket which is a female member with which this 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. An operation piece and an engaging part are formed at the tip of each leg part. The socket includes a socket body and an insertion hole formed in the socket body and into which a plug is inserted. The insertion hole is formed with an abutting portion that abuts the leg portion and elastically displaces the leg portions toward each other, and the engaged portion and the leg portion operation with which the engaging portion of the leg portion is engaged. Openings for exposing the pieces are respectively formed.

  In such a connecting device such as a buckle, for example, when used for connecting a string body that is lowered from the 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 the contact portion between the engaging portion of the plug and the engaged portion of the socket is inclined with respect to the direction in which the plug is pulled out from the socket. Is formed. As a result, the force required to pull out the plug from the socket is reduced, and the connection is released without squeezing the neck, thereby ensuring safety.

  In addition, as disclosed in Patent Document 2, as a connector with safety measures, a connector having a breaking portion that breaks when a certain force is applied, and the engagement of the connector with a certain force or more. There has also been proposed a connector that can be released, and a connector that releases the holding of the connecting part with a certain force or more.

Utility Model Registration No. 3086720 JP-A-9-319

  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 by pulling out from the outside without operating the leg portion of the plug, The bent part of the leg part is the same as the bent part of the leg part when the plug is inserted and the bent 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 is released with a relatively weak drawing force. Therefore, in order to make the pull-out force when disengaged relatively strong to some extent, the inclination angle at the contact position of the contact surface between the engagement portion and the engaged portion is set to be perpendicular to the pull-out direction. In such a structure, the elastic deformation of the leg portion is difficult to perform smoothly, and the engagement portion of the leg portion and the engaged portion of the socket are damaged when the engagement is released. In some cases, it could not be reused.

  Also, in the case of the connector disclosed in Patent Document 2, in the case of a structure in which a part of the connector is broken, the structure cannot be reused. There was the same problem as in Patent Document 1. Furthermore, the structure in which the holding of the connecting portion is released with a force exceeding a certain level requires a mechanism for holding and releasing it, and in order to be released with a certain force, a complicated and highly accurate mechanism is required for fine parts. Is required, and the parts cost is high.

  The present invention has been made in view of the above-mentioned problems of the background art, and an object thereof is to provide a buckle that is released from connection with a relatively strong force and can withstand repeated use.

  The present invention is a connecting tool comprising a plug and a socket provided so as to be connected and disconnected from each other and each having an attachment portion attached to another member, the protruding portion protruding from the base of the plug, and the protruding The socket includes an accommodating portion that accommodates the protruding portion, and an engaged portion that is formed in the accommodating portion and engages with the engaging portion. A first elastic deformation is provided in the plug or the socket, the operation piece for performing a disengagement operation of the joint portion and the engaged portion, and the protruding portion is elastically deformed by the disengagement operation with the operation piece. And the first elastically deformable portion, and when the load is applied in the direction in which the plug and the socket are separated in the connected state, the engaging portion The engagement with the engaged part is released. The second elastically deformable portion that elastically deformed is a linking tool provided in the.

  The first elastic deformation portion and the second elastic deformation portion are formed by forming the wall thickness of the protruding portion thinner than other portions.

  The projecting portion is a pair of leg portions, the engaging portion is provided at a distal end portion of the leg portion, the locked portion is provided in the accommodating portion, and the leg portion is accommodated in the accommodating portion. The engaging portion and the engaged portion are engaged with each other.

  The first elastic deformation portion is formed on the base end side of the leg portion, and the second elastic deformation portion is provided on the engagement portion side of the leg portion. Furthermore, the second elastic deformation portion is provided adjacent to the engagement portion of the leg portion. Alternatively, the second elastic deformation portion is provided in the engagement portion of the protruding portion.

  The protruding portion may be formed of an engaging tongue piece protruding in a flat plate shape, and the engaging portion may be provided at a distal end portion of the engaging tongue piece.

  When the load within the elastic limit is applied to the second elastically deforming part, the engagement between the engaging part and the engaged part is released, and the engagement between the plug and the socket is released. It is possible to repeatedly perform engagement and disengagement without a decrease in engagement strength.

  In the buckle according to the present invention, the first elastic deformation portion and the second elastic deformation portion are separately provided. Therefore, the condition for releasing the engagement by an external load is determined by the elastic coefficient of the second elastic deformation portion. It is possible to set easily and accurately. In particular, it is possible to easily set a structure in which the engagement is released only with a relatively strong force of a certain level or more. In addition, the second elastic deformation portion is a deformation within the elastic limit, and can be provided with a connection tool that is durable against disengagement due to repeated tensile loads and does not cause partial damage.

It is a perspective view of the plug and socket of the buckle of 1st embodiment of this invention. It is a partial fracture front view of a plug and socket of a buckle of a first embodiment. It is a perspective view of the connection state of the buckle of a first embodiment. It is the front view (a) of the plug of the buckle of 1st embodiment, and a right view (b). It is the top view (a), front view (b), and right view (c) of the socket of the buckle of 1st embodiment. It is a front view of the connection state of the buckle of a first embodiment. It is a rear view of the connection state of the buckle of 1st embodiment. It is a perspective view of the plug and socket of the buckle of 2nd embodiment of this invention. It is a partially broken front view of the plug and socket of the buckle of 2nd embodiment. It is a perspective view of the connection state of the buckle of 2nd embodiment. It is the front view (a) of the plug of the buckle of 2nd embodiment, and AA sectional drawing (b). It is the top view (a), front view (b), and BB sectional drawing (c) of the socket of the buckle of 2nd embodiment. It is a partially broken front view of the plug and socket of the buckle of 3rd embodiment of this invention. It is a perspective view of the plug and socket of the locking tool of 4th embodiment of this invention. It is a perspective view of the connection state of the locking tool of 4th embodiment. It is the front view (a) of CC of the locking tool of 4th embodiment, and CC sectional drawing (b). It is the front view (a) and DD sectional drawing (b) of the socket of the locking tool of 4th embodiment. It is the front view (a) of the connection state of the locking tool of 4th embodiment, and EE sectional drawing (b). It is a front view of the connection state of the locking tool of 5th embodiment of this invention. It is FF sectional drawing of FIG.

  Hereinafter, the buckle 10 of 1st embodiment of the coupling device of this invention is demonstrated based on FIGS. The buckle 10 of this embodiment includes a plug 12 and a socket 14 that are attached to the end of other members such as a belt and a string member such as bags (not shown). 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.

  The plug 12 is provided with a pair of leg portions 22 which are projecting in parallel from both sides of the base portion 16 and are symmetrically formed. A thin-walled first elastic deformation portion 23 that is relatively easily elastically deformed is formed by notching a part of the outer surface of the leg portion 22 at the base end portion 22 a 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 engaging portion 24 has a contact surface 24a in a direction substantially perpendicular to the protruding direction of the leg portion 22, and the contact surfaces 24a are opened outward. The outer surface of the engaging portion 24 of the tip 22b of each leg 22 is formed with an inclined surface 22c that approaches each other toward the tip.

  On the base end portion 22a side of the engaging portion 24, a thin second elastic deformation portion 25 that is relatively easily deformed is formed by cutting out a part of the outer surface of the leg portion 22. The second elastic deformation portion 25 is a portion that is easily elastically deformed similarly to the first elastic deformation portion 23, 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 25, a thick operation piece 26 bulging slightly to the side is formed.

  At the edge of the base portion 16 of the plug 12, mounting holes 28a and 28b, which are mounting portions such as a belt to be connected, are formed in parallel so that the length of the belt can be adjusted. In addition, a guide protrusion 29 protrudes in the center of the base 16 in the protruding direction in parallel with the leg 22.

  As shown in FIG. 2 and the like, the socket 14 is formed with an accommodating portion 32 having an insertion port 32a into which the leg portion 22 of the plug 12 is inserted. A pair of engaged portions 34 that engage with the pair of engaging portions 24 of the plug 12 are formed in the base portion 18 that is an end portion on the opposite side to the insertion port 32 a of the accommodating portion 32. The engaged portion 34 has a contact surface 34a that faces the contact surface 24a of the engagement portion 24 and engages with each other. In the contact state, the contact surface is in the protruding direction of each leg portion 22. With respect to the right-angled surface, each is slightly inclined at an angle of about several degrees, for example, about 3 degrees toward the base end portion 22a direction of the leg portion 22 respectively.

  A pair of operation openings 36 are formed on both side surfaces of the socket 14 so that the operation pieces 26 are 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 36 is formed in a shape that is gradually depressed toward the center toward the center in the insertion direction of the operation piece 26 of the leg 22. Further, an attachment hole 38 that is an attachment portion through which a belt or the like is inserted is formed at an end portion of the socket 14 opposite to the insertion port 32a.

  As shown in FIG. 2, a guide groove 39 is formed in the inner surface of the front and back of the housing portion 32 of the socket 14 from the insertion port 32 a toward the base portion 18 at the center portion in the housing portion 32. The guide protrusion 29 of the plug 12 is fitted and inserted into the guide groove 39.

  Next, the usage method and function of the buckle 10 of 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 of FIG. 1. As a result, the inclined surface 22 c of the distal end portion 22 b of the leg portion 22 comes into contact with the guide portion 34 b at the corner portion of the engaged portion 34 in the accommodating portion 32 of the socket 14. Then, as the plug 12 is pushed, the pair of leg portions 22 is temporarily elastically deformed in the inner direction mainly by the first elastic deformation portion 23, and the pair of engaging portions 24 is paired with the pair of engaged portions 34. Pass through the inside. Then, when the contact surface 24a of the engagement portion 24 passes between the contact surfaces 34a of the engaged portion 34 in the insertion direction, the elastic deformation of the first elastic deformation portion 23 of the leg portion 22 is restored, Each leg 22 returns to its original position on the outside. As a result, the contact surfaces 24 a and 34 a face each other and come into surface contact with each other at a surface substantially perpendicular to the insertion direction of the leg portion 22.

  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 26 of the plug 12 exposed from the operation openings 36 on both sides of the socket 14 inward from both sides. Due to elastic deformation, the contact surface 24 a of the engaging portion 24 is separated from the contact surface 34 a of the engaged portion 34 in the inner direction, and the plug 12 can be pulled out from the socket 14.

  Next, the operation in the case where some external tension is applied to the connecting member such as the string body connected by the buckle 10 of this embodiment will be described. When a force F is applied in a direction that separates the plug 12 and the socket 14 of the buckle 10 from each other, the contact surface 24 a of the engaging portion 24 acts on the contact surface 34 a of the engaged portion 34. The force F acting on the contact surfaces 24a and 34a passes through the connected members, and from the base portion 16 through the first elastic deformation portion 23, the operation piece 26, and the second elastic deformation portion 25, the contact surface. It acts on the contact surface 34a from 24a. At this time, since the force F acting on the contact surfaces 24a and 34a acts via the second elastic deformation portion 25, the contact surface 34a of the engaged portion 34 with which the contact surface 24a of the engagement portion 24 contacts. The point of action of the force F at the point F and the point of action of the force F acting on the engaging part 24 from the second elastic deformation part 25 are deviated from each other. The moment M = Fd due to. Due to this moment M, the second elastic deformation portion 25 is elastically deformed so that the distal end portions 22b gradually turn inward. As a result, the contact surface 24a is inclined by a slight rotation of the outer tip of the contact surface 24a to the side opposite to the base portion 16 side by a force F such as external tension. As a result, the angle θ formed between the normal line of the contact surface 24a and the direction of the force F gradually increases from around 0 degrees (hereinafter, the angle θ is assumed to be plus with the movement of the contact surface in the disengagement direction). Called to grow). When the sliding force F1 (F1 = Fsinθ) acting in the direction parallel to the contact surface 24a exceeds the static friction force μFcosθ (μ: static friction coefficient) (F1> μFcosθ), the contact surface 24a The engaging part 24 starts to slide, and the connection between the engaging part 24 and the engaged part 34 is released.

  At this time, the acting direction of the force F between the center of the contact surfaces 24 a and 34 a and the first elastic deformation portion 23 is also shifted in parallel in the first elastic deformation portion 23, and the moment is also applied to the first elastic deformation portion 23. However, this is a moment in the direction of maintaining the contact state of the contact surfaces 24a, 34a, and 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 condition that the buckle 10 is disengaged by an external load depends on the elastic coefficient of the second elastic deformation portion 25. Etc. can be set appropriately so that the engagement can be released with a desired force. In addition, a structure in which the engagement is released only with a relatively strong force of a certain level or more is easily possible. In this case, the elastic coefficient of the second elastic deformation portion 25 may be set so that the engagement is not released with a predetermined small force. For example, the first elastic deformation portion 23 having an elastic coefficient that does not impair the operability of the heel user and inadvertent disconnection do not occur, but when someone is strongly pulled the heel, such The second elastically deformable portion 25 may be elastically deformed by external tension, and the engagement portion 24 and the engaged portion 34 may be disengaged at the limit of the tension that can be withstood by the heel user. it can. In particular, in the case of a child or the like, it is preferable that the contact surfaces 24a and 34a are disengaged at 10 to 20 kg, preferably about a dozen kg, for example 15 kg, which the child can withstand. In addition, the second elastic deformation portion 25 is a deformation within the elastic limit, and is durable against disengagement due to repeated pulling and does not cause partial damage, so that stable quality is maintained for a long time. can do.

  Next, the buckle of 2nd embodiment of the coupling tool 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 the description thereof is omitted. The buckle 40 of this embodiment is also used in the same manner as the buckle of the above-described embodiment, and is used by being attached to the end of a member such as a belt or a string body (not shown).

  A thin first elastic deforming portion 43 that is relatively easily elastically deformed is formed at the base end portion 42a of the pair of leg portions 42 that are the protruding portions of the plug 12 of this embodiment. An operation piece 46 is formed on the distal end side of the intermediate position in the protruding direction of each leg portion 42. An inclined surface 42c is formed on the outer surface of the distal end portion 42b of the operation piece 46 of the leg portion 42 so as to approach each other toward the distal end side. At the end of the operation piece 46 on the base end portion 42a side, an engaging portion 44 that engages with an engaged portion 54 described later and is connected to each other is formed. The engaging portion 44 has a contact surface 44a that is slightly inclined with respect to the protruding direction of the leg portion 42. Each of the contact surfaces 44a is opened outward and inclined toward the base end portion 42a.

  A thin second elastic deformation portion 45 that is relatively easily elastically deformed is formed on the leg portion 42 on the base end portion 42a side that continues from the engagement portion 44. The second elastic deformation portion 45 is a portion that is easily elastically deformed similarly to the first elastic deformation portion 43, and an elastic coefficient in the bending direction is appropriately set according to the application.

  An attachment hole 48 that is an attachment portion such as a belt to be connected is formed at an end edge portion of the base portion 16 of the plug 12. In addition, a guide protrusion 49 is provided at the center of the base portion 16 in the protruding direction in parallel with the leg portion 42. A curved recess 49a is formed on the front surface side of the guide protrusion 49, and a guide groove 49b is formed on the back surface side along the protruding direction.

  The socket 14 is formed with an accommodating portion 52 having an insertion port 52a into which the leg portion 42 of the plug 12 is inserted. A pair of operation openings 56 are formed on both side surfaces of the socket 14 so that the operation pieces 46 are exposed to the outside in an engaged state. The peripheral edge of the operation opening 56 is formed in a shape that is recessed toward the center toward the center of the housing 52. In addition, a mounting hole 58 that is a mounting portion through which a belt or the like is inserted is formed in the base portion 18 that is the end portion of the socket 14 opposite to the insertion port 52a.

  The socket 14 has a pair of engaged portions 54 that engage with the pair of engaging portions 44 of the plug 12, and the insertion port 52 a side of the pair of operation openings 56 where the operation pieces 46 are exposed to the outside. It is formed in the edge part. The engaged portion 54 has an abutment surface 54a that faces the abutment surface 44a of the engagement portion 44 and engages with each other. In the abutting state, the contact surface is in the protruding direction of each leg portion 42. On the other hand, it is provided so as to be able to contact at the same inclination as the contact surface 54 a of the engaging portion 44.

  As shown in FIGS. 9 and 12, a guide groove 59a and a guide projection are formed on the inner surface of the back surface side of the housing portion 52 of the socket 14 from the insertion port 52a toward the base portion 18 side. 59b is formed. The guide protrusion 49 of the plug 12 is fitted into the guide groove 59a, and the guide protrusion 59b is inserted into the guide groove 49b of the plug 12.

  Next, the usage method and function of the buckle 40 of the second embodiment of the present invention will be described. First, when connecting the plug 12 and the socket 14, the leg portion 42 of the plug 12 is inserted into the accommodating portion 52 from the insertion port 52 a of the socket 14 from the state of FIG. 8. At this time, since the plug 12 and the socket 14 are front and back, the guide groove 49 b of the plug 12 is inserted in alignment with the guide protrusion 59 b of the socket 14. As a result of the insertion, the inclined surface 42c of the distal end portion 42b of the leg portion 42 comes into contact with the surface of the guide portion 55, which is an insertion guide surface in the both side walls in the accommodating portion 52 of the socket 14, and once the leg is pushed in, the leg is temporarily inward. The first elastic deformation portion 43 of the portion 42 is elastically deformed, and the pair of engaging portions 44 pass inside the pair of engaged portions 54. Then, when the contact surface 44a of the engaging portion 44 passes through the contact surface 54a of the engaged portion 54, the elastic deformation of the first elastic deformation portion 43 of the leg portion 42 is restored, and the leg portions 42 are restored to their original positions. Return to position. Thereby, the contact surfaces 44a and 54a face each other.

  Next, when the connection between the plug 12 and the socket 14 is released, the operation piece 46 of the plug 12 exposed from the operation opening 56 on both side surfaces of the socket 14 is pressed inward from both sides, thereby The contact surface 44 a is separated from the contact surface 54 a of the engaged portion 54, and the plug 12 can be pulled out from the socket 14.

  Next, the operation in the case where some external tension is applied to the connecting member such as the string body connected by the buckle 40 of this embodiment will be described. When a force F is applied to the buckle 40 in a direction that separates the plug 12 and the socket 14 from each other, the contact surface 44 a of the engaging portion 44 acts on the contact surface 54 a of the engaged portion 54. As for the force F acting on the contact surfaces 44a and 54a, the moment M = Fd (d: deviation width of the point of application of the force) due to the force F acts on the second elastic deformation portion 45 as in the above embodiment. By this moment M, the second elastic deformation portion 45 is elastically deformed so that the tip end portion 42b is gradually turned inward. As a result, the angle θ formed between the normal line of the contact surface 44a and the direction of the force F was initially directed to the minus side from 0 degrees with respect to the direction of the force (the outer tip of the contact surface 44a is the base 16). It is gradually inclined to be larger than 0 degrees. When the sliding force F1 (F1 = Fsinθ) acting in the direction parallel to the contact surface 44a exceeds the static friction force μFcosθ (μ: static friction coefficient) (F1> μFcosθ), the contact surface 44a The sliding starts and the connection between the engaging portion 44 and the engaged portion 54 is released.

  From the above, the condition that the buckle 40 of this embodiment is disengaged by an external force depends on the elastic coefficient of the second elastic deformation portion 45, and the thickness, thickness cross-sectional shape, etc. of this portion are appropriately set. It can be set so that the engagement can be released with a desired force. Also in this embodiment, a structure in which the engagement is disengaged only with a relatively strong force of a certain level or more is possible as in the above embodiment. Furthermore, since the operation piece 46 is on the distal end side of the leg portion 42, the first elastic deformation portion 43 of the leg portion 42 can be elastically deformed with a lighter operation.

  Next, a buckle according to a third embodiment of the connector of the present invention will be described with reference to FIG. Here, the same members as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted. The buckle 60 of this embodiment is also used in the same manner as the buckle of the above embodiment, and is used by being attached to the end of a member such as a belt or a string body (not shown).

  The plug 12 of this embodiment is provided with a pair of leg portions 62 that project from a position slightly closer to the center than both sides. On the outer side of the leg portion 62 of the plug 12, a positioning projection 61 for projecting and positioning when inserted into the socket 14 is projected.

  A first elastic deformation portion 63 that is easily elastically deformed is formed at the base end portion 62 a of the leg portion 62. The leg portion 62 is formed in a thin and annular shape, and includes a space portion 62d penetrating in the thickness direction. An inclined surface 62c is formed on the outer surface of the distal end portion 62b of the leg portion 62 so as to approach each other toward the distal end side. An engaging portion 64 that engages and engages with an engaged portion 74 described later of the socket 14 is formed at the distal end portion 62 b of each leg portion 62. The engaging portion 64 has a contact surface 64a in a direction substantially perpendicular to the protruding direction of the leg portion 62, and the contact surfaces 64a are opened outward. The thickness of the resin in the portion where the engaging portion 64 is formed is thinner than the first elastic deformation portion 63 of the base end portion 62a of the leg portion 62, and the elastic deformation is relatively easily formed. 65 is constituted. Here, the first elastic deformation portion 63 and the second elastic deformation portion 65 also have an elastic coefficient in the bending direction as appropriate according to the application, as in the above embodiment. An attachment hole 68 that is an attachment portion such as a belt to be connected is formed at the end edge portion of the base portion 16 of the plug 12.

  The socket 14 is formed with a receiving portion 72 into which the leg portion 62 of the plug 12 is inserted. On both side surfaces of the socket 14, operation pieces 76 that are elastically deformed by pushing the leg portions 62 of the plug 12 in the central direction in an engaged state are provided on both sides so as to be swingable. The operation pieces 76 each have an operation piece 76a bulging outward, and a pressing portion 76b that protrudes inward from the inner surface of the operation piece 76a and contacts the outer surface of the engaging portion 64 of the engaged plug 12. And.

  A pair of engaged portions 74 that are engaged with the pair of engaging portions 64 of the plug 12 protrude from the accommodating portion 72 of the socket 14. The engaged portion 74 has an abutment surface 74a that faces the abutment surface 64a of the engagement portion 64 and engages with each other. In the abutment state, the contact surface is in the protruding direction of each leg portion 62. It is located on the plane that intersects at approximately 90 degrees. A guide portion 74 b is formed at the base end portion of the locked portion 74 so that the inclined surface 62 c at the tip end of the leg portion 62 comes into contact therewith. A mounting hole 78, which is a mounting portion through which a belt or the like is inserted, is formed in the base portion 18 which is the end portion of the socket 14 opposite to the insertion port 72a.

  Next, the usage method and function of the buckle 60 of the third embodiment of the present invention will be described. First, when connecting the plug 12 and the socket 14, the leg portion 62 of the plug 12 is inserted into the accommodating portion 72 from the insertion port 72 a of the socket 14. As a result of the insertion, the inclined surface 62c of the distal end portion 62b of the leg portion 62 comes into contact with the guide portion 74b of the locked portion 74, and the first elastic deformation portion 63 of the leg portion 62 is once elastically deformed inward in response to pushing. The pair of engaging portions 64 passes inside the pair of engaged portions 74. And when the contact surface 64a of the engaging part 64 passes the contact surface 74a of the to-be-engaged part 74, the elastic deformation of the leg part 62 will return, and the leg part 62 will each return to an original position. Thereby, the contact surfaces 64a and 74a face each other.

  Next, when the connection between the plug 12 and the socket 14 is released, the first elastic deformation portion 63 of the plug 12 is elastically deformed by pressing the operation pieces 76 on both side surfaces of the socket 14 inward from both sides. The joint 64 moves inward so as to approach each other. Thereby, the contact surface 64a of the engaging portion 64 is separated from the contact surface 74a of the engaged portion 74, and the plug 12 can be pulled out from the socket 14.

  Next, the operation in the case where some external tension is applied to the connecting member such as the string body connected by the buckle 60 of this embodiment will be described. When a force F in a direction in which the plug 12 of the buckle 60 and the socket 14 are separated from each other is applied, the contact surface 64 a of the engaging portion 64 acts on the contact surface 74 a of the engaged portion 74. The force F acting on the contact surfaces 64a and 74a has a moment M = Fd (d: deviation width of the acting point of the force) due to the acting force F in the second elastic deformation portion 65, as in the above embodiment. work. By this moment M, the second elastic deformation portion 65 is elastically deformed so that the tip end portion 62b gradually turns inward. As a result, the angle θ formed by the normal line of the contact surface 64a and the direction of the force F gradually increases from 0 degrees with respect to the direction of the force. When the sliding force F1 (F1 = Fsinθ) acting in a direction parallel to the contact surface 64a exceeds μFcosθ (μ: coefficient of static friction) which is a static friction force (F1> μFcosθ), the contact surface 64a is The sliding starts and the connection between the engaging portion 64 and the engaged portion 74 is released.

  From the above, the condition that the buckle 60 of this embodiment is disengaged by an external force depends on the elastic coefficient of the second elastic deformation portion 65, and the thickness, thickness, etc. of this portion are appropriately set. Thus, the engagement can be designed to be released with a desired force. Also in this embodiment, a structure in which the engagement is disengaged only with a relatively strong force of a certain level or more is possible as in the above embodiment.

  Next, the locking tool of 4th embodiment of the coupling tool 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 the description thereof is omitted. The locking tool 80 of this embodiment is used in the same manner as the buckle of the above embodiment, and is used by being attached to the end of a member such as a belt or a string body (not shown).

  As shown in FIGS. 14 and 16, the plug 12 is provided with a tongue-like piece 81 which is a protruding portion protruding from the base portion 16 in a flat plate shape, and the tip of the tongue-like piece 81 is provided inside the tongue-like piece 81. A through groove 81b is formed in a U shape when viewed from the portion 81a. The portion surrounded by the through groove 81 b constitutes the engaging tongue piece 82. An attachment hole 88 that is an attachment portion such as a belt to be connected is formed at the end edge portion of the base portion 16 of the plug 12.

  On the back side of the base end portion 82a of the engaging tongue piece 82, a first elastic deformation portion 83, which is a thin portion that is relatively easily elastically deformed, is formed. An engaging portion 84 that engages with an engaged portion 94 (to be described later) of the socket 14 and is connected to each other is formed at the distal end portion 82 b of the engaging tongue piece 82. The engaging portion 84 has a contact surface 84a that is substantially perpendicular to the protruding direction of the engaging tongue piece 82, and the contact surface 84a is open upward. An inclined surface 82c is formed on an upper surface on the distal end side of the engaging portion 84 of the distal end portion 82b of the engaging tongue piece 82 so as to approach the rear surface as it goes toward the distal end side. A through hole 82d is formed in the engaging tongue piece 82 in contact with a portion where the engaging portion 84 of the engaging tongue piece 82 is formed, and elastic deformation is relatively easy on the back surface side of the side of the through hole 82d. A second elastic deformation portion 85 that is a thin-walled portion is configured. Here, the first elastic deformation portion 83 and the second elastic deformation portion 85 also have an elastic coefficient in the flexing direction appropriately set according to the application, as in the above embodiment.

  As shown in FIGS. 17 and 18, the socket 14 is formed with a receiving portion 92 into which the engaging tongue piece 82 of the plug 12 is inserted. On the surface side of the socket 14, an operation piece 96 that is elastically deformed by pushing the engagement tongue piece 82 of the plug 12 in the center direction in a connected state is provided so as to be swingable inward and outward. In the accommodating portion 92 of the socket 14, an engaged portion 94 that engages with the engaging portion 84 of the plug 12 is provided on the inner surface on the surface side. The engaged portion 94 has an abutment surface 94a that faces the abutment surface 84a of the engagement portion 84 and engages with each other. In the abutment state, the contact surface is the protruding direction of the engagement tongue piece 82. Is located on a plane that intersects at approximately 90 degrees. In the vicinity of the insertion opening 92 a of the housing portion 92, a guide portion 94 b that elastically deforms by pressing the engaging tongue piece 82 of the plug 12 toward the back surface when the plug 12 is inserted is provided in the locked portion 94. Furthermore, a mounting hole 98 that is a mounting portion through which a belt or the like is inserted is formed in the base portion 18 that is the end portion of the socket 14 opposite to the insertion port 92a.

  Next, the usage method and function of the locking tool 80 according to the fourth embodiment of the present invention will be described. First, when connecting the plug 12 and the socket 14, the engaging tongue piece 82 of the plug 12 is inserted into the accommodating portion 92 from the insertion port 92 a of the socket 14. As a result of the insertion, the inclined surface 82c of the distal end portion 82b of the engaging tongue piece 82 comes into contact with the guide portion 94b of the locked portion 94, and the first elastically deforming portion 83 of the engaging tongue piece 82 once in the reverse direction as it is pushed. Is elastically deformed, and the engaging portion 84 passes below the engaged portion 94. Then, when the contact surface 84a of the engaging portion 84 passes through the contact surface 94a of the engaged portion 94, the elastic deformation of the engaging tongue piece 82 is restored, and the engaging tongue pieces 82 are returned to their original outer sides. Return to position. Thereby, the contact surfaces 84a and 94a face each other.

  Next, when the connection between the plug 12 and the socket 14 is released, the first elastic deformation portion 83 of the plug 12 is elastically deformed by pressing the operation piece 96 on the surface side of the socket 14 inward, so that the engagement portion Move inward so that 84 approach each other. Thereby, the contact surface 84 a of the engaging portion 84 is separated from the contact surface 94 a of the engaged portion 94, and the plug 12 can be pulled out from the socket 14.

  Next, an operation in the case where some external tension is applied to a connecting member such as a string body connected by the buckle 80 of this embodiment will be described. When a force F is applied in a direction in which the plug 12 of the buckle 80 and the socket 14 are separated from each other, the contact surface 84a of the engaging portion 84 acts on the contact surface 94a of the engaged portion 94. As for the force F acting on the contact surfaces 84a and 94a, the moment M = Fd (d: deviation width of the acting point of the force) due to the force F acting on the second elastic deformation portion 85 works as in the above embodiment. By this moment M, the second elastic deformation portion 85 is elastically deformed so that the tip end portion 82b is gradually rotated downward. As a result, the angle θ between the normal line of the contact surface 84a and the direction of the force F gradually increases from 0 degrees with respect to the direction of the force F. When the sliding force F1 (F1 = Fsinθ) acting in a direction parallel to the contact surface 84a exceeds μFcosθ (μ: static friction coefficient) that is a static friction force (F1> μFcosθ), the contact surface 84a is The sliding starts and the connection between the engaging portion 84 and the engaged portion 94 is released.

  From the above, the conditions under which the locking tool 80 of this embodiment is disengaged by an external force depends on the elastic coefficient of the second elastic deformation portion 85, and the thickness, thickness, etc. of this portion are appropriately set. It can be set so that the engagement can be released with a desired force. Also in this embodiment, a structure in which the engagement is disengaged only with a relatively strong force of a certain level or more is possible as in the above embodiment.

  Next, a locking tool according to a fifth embodiment of the connector of the present invention will be described with reference to FIGS. Here, the same members as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted. The locking tool 100 of this embodiment is used by being attached to the end of an opening / closing member such as a bag (not shown).

  As shown in FIGS. 19 and 20, the plug 12 is provided with a tongue-like piece 101 that protrudes in an annular shape from the base portion 16, and is a protrusion that protrudes in a disk shape inside the tongue-like piece 101. A tongue piece 102 is provided. The engaging tongue piece 102 is provided with an operation piece 106 on the front surface side, and an inclined surface 102c is formed in the vicinity of the connecting portion of the engaging tongue piece 102 with the tongue-like piece 101 so as to approach the back surface toward the end edge side. Yes. The engaging tongue piece 102 is connected on the tip portion 101a side of the annular tongue-like piece 101, and is folded back and extended on the base portion 16 side. The connecting portion of the engaging tongue piece 102 with the tongue-like piece 101 constitutes a first elastic deformation portion 103 that swings for engaging and disengaging operations of the engaging portion 104 described above. The engaging tongue piece 102 is normally positioned so that the engaging portion 104 side is inclined upward with respect to the tongue-like piece 101, and the engaging tongue piece 102 is attached to the socket-like piece 101 in a state of being fitted to the socket 14. It is elastically pressed to the approached position.

  An engaging portion 104 that engages with a later-described engaged portion 114 of the socket 14 and is connected to each other is formed at the distal end edge portion of the engaging tongue piece 102. The engaging portion 104 has a contact surface 104a that is substantially perpendicular to the protruding direction of the engaging tongue piece 102, and the contact surface 104a is open upward. The engaging tongue piece 102 is formed with a through hole 102d for relatively easily making elastic deformation, and the distal end edge portion of the engaging tongue piece 102 formed with the through hole 102d and having a narrow width is the second. The elastic deformation part 105 is comprised. Here, also in the first elastic deformation portion 103 and the second elastic deformation portion 105, the elastic modulus in the bending direction is appropriately set according to the application, as in the above embodiment.

  As shown in FIGS. 19 and 20, the socket 14 is formed with a receiving portion 112 into which the engaging tongue piece 102 of the plug 12 is inserted. An engaged portion 114 that engages with the engaging portion 104 of the plug 12 is provided in the inner surface 112 inside the housing portion 112. The engaged portion 114 has an abutment surface 114a that faces the abutment surface 104a of the engagement portion 104 and engages with each other. In the abutting state, the contact surface is the protruding direction of the engaging tongue piece 102. Is located on a plane that intersects at approximately 90 degrees. Near the insertion port 112a of the housing portion 112, the base end portion 114b of the locked portion 114 that elastically deforms the first elastic deformation portion 103 by pushing the engaging tongue piece 102 of the plug 12 toward the back surface when the plug 12 is inserted. Is provided.

  A plurality of mounting projections 107 and 115 which are mounting portions for mounting the respective members connected to each other at predetermined positions are integrally provided on the back surfaces of the plug 12 and the socket 14 of this embodiment. It is fixed with screws inserted from the back side.

  Next, the usage method and function of the locking tool 100 according to the fifth embodiment of the present invention will be described. First, when connecting the plug 12 and the socket 14, the engaging tongue piece 102 of the plug 12 is inserted into the accommodating portion 112 from the insertion port 112 a of the socket 14. The inclined surface 102c of the distal end portion 102b of the engaging tongue piece 102 is brought into contact with the base end portion 114b of the locked portion 114 by the insertion, and the first elastically deforming portion of the engaging tongue piece 102 once in the rear surface direction as it is pushed. 103 is elastically deformed, and the engaging portion 104 passes below the engaged portion 114. Then, when the contact surface 104a of the engagement portion 104 passes through the contact surface 114a of the engaged portion 114, the elastic deformation of the engagement tongue piece 102 is restored, and the engagement tongue pieces 102 are returned to their original outer sides. Return to position. Thereby, the contact surfaces 104a and 114a face each other.

  Next, when the connection between the plug 12 and the socket 14 is released, the first elastic deformation portion 103 of the plug 12 is elastically deformed and moves inward by pressing the operation piece 106 on the surface side of the plug 12 inward. . Thereby, the contact surface 104a of the engaging portion 104 is separated from the contact surface 114a of the engaged portion 114, and the plug 12 can be pulled out from the socket 14.

  Next, the operation when some external tension is applied to the members connected by the locking tool 100 of this embodiment will be described. When a force F in a direction in which the plug 12 and the socket 14 of the locking tool 100 are separated from each other is applied, the force F acts on the contact surface 114a of the engaged portion 114 by the contact surface 104a of the engaging portion 104. . As for the force F acting on the contact surfaces 104a and 114a, the moment M = Fd (d: deviation width of the point of application of the force) due to the force F acting on the second elastic deformation portion 105 works as in the above embodiment. Due to this moment M, the second elastic deformation portion 105 is elastically deformed so as to gradually rotate counterclockwise in FIG. As a result, the angle θ formed between the normal line of the contact surface 104a and the direction of the force F gradually increases from 0 degrees with respect to the direction of the force F. When the sliding force F1 (F1 = Fsinθ) acting in the direction parallel to the contact surface 104a exceeds μFcosθ (μ: coefficient of static friction) which is a static friction force (F1> μFcosθ), the contact surface 104a is The sliding starts, and the connection between the engaging portion 104 and the engaged portion 114 is released.

  From the above, the conditions under which the locking tool 100 of this embodiment is disengaged by an external force depends on the elastic coefficient of the second elastic deformation portion 105, and the thickness, thickness, etc. of this portion are appropriately set. It can be set so that the engagement can be released with a desired force. Also in this embodiment, a structure in which the engagement is disengaged only with a relatively strong force of a certain level or more is possible as in the above embodiment.

  In addition, the coupler of this invention is not limited to said each embodiment, A material may be a metal and composite material of resin and metal other than resin. The elastic coefficients of the first elastic deformation portion and the second elastic deformation portion can be arbitrarily set depending on the thickness, thickness, cross-sectional shape, and the like. Further, the operation piece and the member to be connected can be appropriately selected.

10 Buckle 12 Plug 14 Socket 16, 18 Base 22, 42, 62, Leg 22a, 42a, 62a, 82a Base end 22b, 42b, 62b, 82b, Tip 22c, 42c, 62c, 82c Inclined surface 24, 44 , 64, 84, 104 Engaging portions 24a, 34a, 44a, 54a, 64a, 74a, 84a, 94a, 104a Abutting surfaces 23, 43, 63, 83, 103 First elastic deformation portions 25, 45, 65, 85 , 105 Second elastic deformation portions 26, 46, 76, 86, 106 Operation pieces 28a, 28b, 38 Mounting holes 32, 52, 72, 92, 112 Housing portions 32a, 52a, 72a, 92a, 112a Insert port 34, 54, 74, 94, 114 engaged portion

Claims (8)

In a connector comprising a plug (12) and a socket (14) each provided with a mounting portion (28a, 38) that can be connected and disconnected from each other and attached to another member,
A protruding portion (22, 42, 62, 82, 102) protruding from the base (16) of the plug (12) and an engaging portion (22, 42, 62, 82, 102) formed on the protruding portion (22, 42, 62, 82, 102) 24, 44, 64, 84, 104)
The socket (14) includes an accommodating portion (32, 52, 72, 92, 112) for accommodating the protruding portion (22, 42, 62, 82, 102) and an accommodating portion (32, 52, 72, 92, 112) and an engaged portion (34, 54, 74, 94, 114) to which the engaging portion (24, 44, 64, 84, 104) is engaged,
Operation pieces (26, 46, 76, 86, 86) for releasing the engagement between the engaging portions (24, 44, 64, 84, 104) and the engaged portions (34, 54, 74, 94, 114). 106) is provided in the plug (12) or the socket (14),
The protrusions (22, 42, 62, 82, 102) are provided with first elastic deformation portions (23, 43) that are elastically deformed by an engagement releasing operation with the operation pieces (26, 46, 76, 86, 106). , 63, 83, 103) and the first elastically deforming portion (23, 43, 63, 83, 103) are formed at different positions, and in a connected state of the plug (12) and the socket (14), When a load is applied in a direction in which they are separated from each other, the engaging portion (24, 44, 64, 84, 104) and the engaged portion (34, 54, 74, 94, 114) are more than a certain load. And a second elastically deformable portion (25, 45, 65, 85, 105) that is elastically deformed so as to be disengaged from the connector.   The first elastically deforming portion (23, 43, 63, 83, 103) and the second elastically deforming portion (25, 45, 65, 85, 105) are connected to the protruding portion (22, 42, 62, 82, 102). The connector according to claim 1, wherein the wall thickness of () is formed thinner than other portions.   The projecting portion is a pair of leg portions (22, 42, 62), the engaging portion (24, 44, 64) is provided at the tip of the leg portion (22, 42, 62), and the housing portion ( 32, 52, 72) is provided with the locked portions (34, 54, 74), the leg portions (22, 42, 62) are accommodated in the accommodating portions (32, 52, 72), and the The coupling tool according to claim 1 or 2, wherein the engaging portion (24, 44, 64) and the engaged portion (34, 54, 74) are engaged.   The first elastic deformation part (23, 43, 63) is formed on the base end part (22a, 52a, 62a) side of the leg part (22, 42, 62), and the second elastic deformation part (25, 45. The coupling tool according to claim 3, wherein 45, 65) is provided on the side of the engaging portion (24, 44, 64) of the leg portion (22, 42, 62).   The said 2nd elastic deformation part (25,45,65) is provided adjacent to the said engaging part (24,44,64) of the said leg part (22,42,62). Coupling tool.   The coupling tool according to claim 1, wherein the second elastic deformation portion (65, 105) is provided in the engagement portion (64, 104) of the protrusion (62, 102).   The projecting portion is composed of an engaging tongue piece (82, 102) projecting in a flat plate shape, and the engaging portion (84, 104) is provided at a distal end portion of the engaging tongue piece (82, 102). Item 1. A connector according to item 1. When the second elastic deformation portion (25, 45, 65, 85, 105) is applied in a direction in which the loads within its elastic limit are separated from each other, the engagement portion (24, 44, 64, 84, 104). And the engaged portion (34, 54, 74, 94, 114) are released, and the engagement and release of the plug (12) and the socket (14) The connector according to claim 1, which can be repeatedly performed without a decrease.

Images