WO2023095687A1 - Linking device and electronic device - Google Patents

Abstract

In this linking device (1), when a resilient member (4) is in an unconnected state, a restoring force vector (81) substantially overlaps a first reference line (82) and the restoring force and an opposing force are balanced with each other, whereby the position of an operating portion (5) is maintained and the state of the resilient member (4) is kept in the unconnected state. When the position of the operating portion (5) is changed in a state in which an electric wire is inserted between a terminal portion (31) and the resilient member (4) in the unconnected state, the part of the operating portion (5) in which the opposing force is generated transitions from a second part (514) to a third part, whereby a second reference line is generated, and the resilient member (4) is restored from the unconnected state by the restoring force and transitions to a connected state in which the electric wire is clamped between the resilient member (4) and the terminal portion (31). This allows for a reduction in the force required to disengage the unconnected state.

Description

Connectivity and electronics

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection device to which electric wires are connected, and an electronic device provided with the connection device.
[Reference to related application]
This application claims the benefit of priority from Japanese Patent Application JP2021-192626 filed on November 29, 2021, the entire disclosure of which is incorporated herein.

Conventionally, so-called push-in type connection devices have been used as connection devices to which electric wires are connected in control panels and the like. In the connection device, an electric wire is inserted into the insertion hole of the case, and is electrically connected by pressing the electric wire against the conduction terminal by a leaf spring provided in the case.

For example, the wire connection device disclosed in Japanese Patent No. 4202125 (Document 1) is provided with a rod-shaped operation button that can move back and forth with respect to the housing. In the wire connection device, when the rod-shaped operation button is pushed toward the housing, the plate spring in the housing is elastically deformed and separated from the conductive metal fitting. The tip of the rod-shaped operation button engages with the leaf spring to maintain the shape of the leaf spring. As a result, the open state in which the leaf spring is separated from the conductive fitting is maintained. After the wire is inserted into the wire connecting device in the open state, the rod-shaped operation button is pulled out from the housing, whereby the leaf spring is elastically restored and the wire is clamped between the conductive metal fitting.

In the wire connection device, when connecting the wire, it is necessary to pull out the rod-shaped operation button from the housing while maintaining the state in which the wire is inserted into the wire connection device in the open state. As a result, the wire connection operation becomes complicated, and it is difficult to shorten the time required for the connection operation. In addition, since the operator must hold the wire with one hand and operate the rod-shaped operation button with the other hand, it is difficult to perform the connection work with one hand.

On the other hand, in the connecting device disclosed in Japanese Patent No. 6675004 (Document 2), by pushing the operating section into the inside of the case, the plate spring in contact with the operating section is deflected to a non-connected state, and in this state, the operating section is moved to the case. By engaging with the stepped portion of the leaf spring, the state of the leaf spring is maintained in a non-connected state. Further, in the connection device, the electric wire inserted into the case pushes the state releasing portion to rotate it, so that the state releasing portion pushes the operation portion out of the stepped portion of the case. As a result, the operation portion is unlocked from the case, and the leaf spring restores to sandwich the electric wire between itself and the terminal portion. As a result, the work of connecting electric wires is facilitated.

By the way, in the connecting device of Document 2, in order to prevent unintentional release of the locking of the operating part from the case, it is necessary to increase the stepped portion where the operating part is locked to some extent. However, if the stepped portion becomes large, the force required to release the locking of the operating portion from the case (that is, to release the unconnected state) becomes large, which may reduce the operability of the connected device.

The present invention is directed to a connection device to which electric wires are connected, and aims to reduce the force required to release the unconnected state.

A connection device according to a preferred embodiment of the present invention includes a case, a conductive terminal portion fixed to the case, and an elastic member attached to the case and holding an electric wire against the terminal portion by a restoring force. and an operating portion that applies a force to the elastic member to bend it from an initial state to a non-connected state and maintains the non-connected state. The operating portion includes a first portion on which the restoring force of the elastic member acts, a second portion on which a reaction force against the restoring force is generated in the non-connected state, and a difference between the first portion and the second portion. and a third part. Let the vector of the said restoring force be a restoring force vector. A straight line connecting the first portion and the second portion is defined as a first reference line. A straight line connecting the first portion and the third portion is defined as a second reference line. When the elastic member is in the unconnected state, the restoring force vector substantially overlaps with the first reference line and the restoring force and the reaction force are balanced, thereby maintaining the position of the operating portion and the elastic member. The state of the member is maintained in the unconnected state. When the position of the operation portion is changed in a state where the electric wire is inserted between the terminal portion and the elastic member in the unconnected state, the portion of the operation portion where the reaction force is generated is the second elastic member. part to the third part. As a result, the second reference line is generated, and the elastic member is restored from the unconnected state by the restoring force, and transitions to a connected state in which the electric wire is sandwiched between itself and the terminal portion. As a result, the force required to release the unconnected state can be reduced.

Preferably, the operation portion includes a cam portion that rotates around a rotation shaft provided on the case. The cam portion includes a bearing into which the rotating shaft is inserted and which has an inner diameter larger than the outer diameter of the rotating shaft. When the elastic member is shifted to the unconnected state, the cam portion rotates around the rotating shaft, thereby increasing the distance between the first portion and the rotating shaft and bending the elastic member. , the restoring force of the elastic member presses the second portion against a support portion provided on the case. By the restoring force vector substantially overlapping the first reference line, the rotational position of the operating portion is maintained, and the state of the elastic member is maintained in the unconnected state. When connecting the electric wire, the cam portion is displaced with respect to the support portion to release the pressure of the second portion on the support portion. As a result, the third portion, which is a part of the bearing, is pressed against the rotating shaft, and the portion where the reaction force is generated in the operating portion shifts from the second portion to the third portion.

Preferably, the restoring force vector is slightly inclined to one side with respect to the first reference line in the unconnected state, and when transitioning from the unconnected state to the connected state, the restoring force vector is inclined to the first reference line. Transition from one side of the line to the other.

Preferably, when the electric wire is connected, a force is transmitted from the inserted electric wire to the operation portion, whereby the position of the operation portion is changed, and the portion of the operation portion where the reaction force is generated is the above-mentioned portion. Transition from the second part to the third part.

Preferably, the connection device further includes a release section that is pressed by the inserted electric wire and displaced to contact the operating section and change the position of the operating section when the electric wire is connected. The release portion is a member connected to the terminal portion.

Preferably, in the unconnected state, a portion of the operating portion protrudes from the case.

Preferably, a visually recognizable identification portion indicating the position of the operation portion is provided.

Preferably, the elastic member is a leaf spring.

The present invention is also directed to electronic devices. An electronic device according to a preferred embodiment of the present invention includes the connection device described above.

The above-mentioned and other objects, features, aspects and advantages will become apparent from the detailed description of the present invention given below with reference to the accompanying drawings.

1 is a front view of a connection device according to one embodiment; FIG. It is a top view of a connection apparatus. It is a right view of a connection apparatus. It is a vertical cross-sectional view of the connection device. It is a longitudinal cross-sectional view of a case. It is a front view of a terminal metal fitting. It is a perspective view of a terminal metal fitting. It is a perspective view of a terminal metal fitting. It is a front view of an elastic member. It is a front view of an operation part. It is a vertical cross-sectional view of the connection device. It is a vertical cross-sectional view of the connection device. It is a vertical cross-sectional view of the connection device. FIG. 5 is a diagram showing the relationship between the amount of displacement of the operating portion and the rotational moment; It is a vertical cross-sectional view of the connection device. It is a vertical cross-sectional view of the connection device. It is a vertical cross-sectional view of the connection device. FIG. 5 is a diagram showing the relationship between the amount of displacement of the operating portion and the rotational moment;

FIG. 1 is a front view of a connection device 1 according to one embodiment of the present invention. In FIG. 1 , illustration of the cover portion on the front side of the connected device 1 is omitted, and the internal structure of the connected device 1 is shown. 2 is a plan view of the connection device 1, and FIG. 3 is a right side view of the connection device 1. FIG. FIG. 4 is a vertical cross-sectional view of the connection device 1 taken along line IV-IV in FIG. In FIG. 4, the configuration on the back side of the cross section is also illustrated. The same applies to other vertical cross-sectional views to be described later. The connection device 1 is a push-in type connection device to which electric wires are connected. 1 to 4 show a state in which the electric wire is not inserted into the connection device 1. FIG. The connection device 1 is used, for example, as a terminal block of a control panel.

In the following description, the up-down direction and left-right direction in FIG. 1 are also simply referred to as "up-down direction" and "left-right direction". In addition, the direction perpendicular to the paper surface in FIG. 1 is also referred to as the "thickness direction". FIG. 4 shows a cross-section on the front side of the center of the connection device 1 in the thickness direction. The vertical direction, the horizontal direction, and the thickness direction do not necessarily have to match the mounting direction when the connection device 1 is used. Moreover, the vertical direction does not necessarily have to coincide with the direction of gravity.

The connection device 1 includes a case 2, a terminal fitting 3, an elastic member 4, and an operation portion 5. FIG. 5 is a longitudinal sectional view of the case 2. FIG. 6 is a front view of the terminal fitting 3, and FIGS. 7 and 8 are perspective views of the terminal fitting 3. FIG. FIG. 9 is a front view of the elastic member 4. FIG. 10 is a front view of the operation unit 5. FIG.

The case 2 is a substantially rectangular parallelepiped box-shaped member that opens toward the front side in the thickness direction. The case 2 accommodates the terminal fitting 3, the elastic member 4, and the operating portion 5 therein. The case 2 is, for example, a member made of resin. The case 2 is provided with an insertion hole 21 into which an electric wire can be inserted. Further, the case 2 is provided with an operation hole 27 for operating the operation portion 5 and a test hole 28 for an electrical test. In this embodiment, the operation hole 27 is arranged on the upper surface of the case 2 . Also, the insertion hole 21 and the test hole 28 are arranged on the right side of the case 2 . The test hole 28 is spaced from the insertion hole 21 and arranged below the insertion hole 21 . A vertically extending slit 29 is also provided on the right side surface of the case 2 . The slit 29 is spaced apart from the insertion hole 21 and arranged above the insertion hole 21 .

The terminal fitting 3 is a conductive member fixed to the case 2, and is formed by processing a metal plate, for example. The terminal fitting 3 includes a terminal portion 31 , a releasing portion 32 , an external terminal 33 , a releasing connection portion 34 and a fitting body 35 . The metal fitting main body 35 is a substantially flat plate-like portion that extends substantially perpendicularly to the thickness direction, and has a substantially rectangular shape when viewed from the front. The metal fitting main body 35 is a connection portion that connects the terminal portion 31, the release portion 32, the external terminal 33, and the release connection portion 34 to form a continuous member.

The terminal portion 31 is a substantially flat plate-like portion extending along the upper end portion of the metal fitting main body 35, and protrudes from the upper end portion toward the depth side in the thickness direction. In this embodiment, the terminal portion 31 is inclined slightly upward toward the right. As will be described later, the electric wire is sandwiched between the terminal portion 31 and the elastic member 4 .

The release portion 32 is a substantially flat plate-like portion that extends substantially vertically on the left side of the metal fitting main body 35 and that is arranged with both main surfaces directed horizontally. A vertical central portion of the release portion 32 extends substantially parallel to the vertical direction. A portion above and below the central portion of the releasing portion 32 (that is, an upper portion and a lower portion of the releasing portion 32) are bent slightly to the right from the central portion. The upper portion of the releasing portion 32 is a sloped portion directed rightward as it goes upward. The lower portion of the release portion 32 is a sloped portion directed rightward as it goes downward.

The release portion 32 is connected via a release connection portion 34 to the upper left corner of the metal fitting main body 35 when viewed from the front. The release connection portion 34 is a strip-shaped or rod-shaped portion that extends upward from the corner portion of the metal fitting main body 35 and further extends leftward. The release connecting portion 34 is connected to the release portion 32 at substantially the center of the release portion 32 in the vertical direction. Since the portion of the release connection portion 34 that is connected to the release portion 32 is thin, it is easily deformed with a relatively small force. For example, when a leftward force is applied to the lower portion of the releasing portion 32, the releasing portion 32 slightly rotates clockwise about the connection portion with the release connecting portion 34, and the upper portion of the releasing portion 32 moves rightward. and displace.

The external terminal 33 is a substantially strip-shaped or substantially rod-shaped portion protruding downward from the lower end of the metal fitting main body 35 . In the present embodiment, two external terminals 33 extend downward from the lower end of metal fitting main body 35 . The two external terminals 33 are fixed to the board of the control panel by soldering, for example, and are electrically connected. As a result, the connection device 1 is mounted on the board. Alternatively, the external terminal 33 may be electrically connected to the wiring by soldering directly to the wiring.

The elastic member 4 is an elastically deformable member attached to the case 2 . In this embodiment, the elastic member 4 is a substantially strip-shaped leaf spring. The elastic member 4 may be made of a conductive material, or may be made of an insulating material such as resin. In this embodiment, the elastic member 4 is made of a conductive metal. The elastic member 4 has, for example, a substantially L-shaped, substantially V-shaped, or substantially U-shaped bent shape at the central portion in the longitudinal direction. In the following description, the bent portion of the elastic member 4 will be referred to as a "bent portion 41". In addition, of the two portions extending leftward from the bent portion 41 in the elastic member 4, the lower portion is referred to as a "fixed portion 42", and the portion positioned above the fixed portion 42 is referred to as a "movable portion". 43”.

The case 2 is provided with a substantially cylindrical elastic member support portion 22 extending in the thickness direction. , grooves are formed. A bent portion 41 of the elastic member 4 is inserted into the groove, whereby the elastic member 4 is attached to the case 2 . Since the lower surface of the fixed portion 42 is in contact with the case 2, downward movement of the fixed portion 42 is restricted. Therefore, the fixed portion 42 is substantially fixed to the case 2 .

The movable part 43 extends obliquely upward to the left from the bent part 41 on the upper side of the elastic member supporting part 22 . The distal end portion of the movable portion 43 (that is, the left end portion in FIG. 4) is in contact with the substantially central portion of the terminal portion 31 in the left-right direction from below. Further, the movable portion 43 is in contact with the operation portion 5 from the left side and the lower side. In the state shown in FIG. 4 , the movable portion 43 is in surface contact with the operating portion 5 . As will be described later, the movable portion 43 is pushed downward by the operation portion 5 to be elastically deformed with the elastic member support portion 22 as a fulcrum, bent downward, and separated downward from the terminal portion 31 . Further, when the downward pressing force applied to the movable portion 43 is removed, the movable portion 43 returns to its original state due to the restoring force (that is, elastically returns).

In the state shown in FIG. 4, the tip of the movable portion 43 of the elastic member 4 is in contact with the terminal portion 31 from below as described above. As a result, an insertion path for the electric wire, which will be described later, is closed by the movable portion 43 of the elastic member 4 inside (that is, on the left side) of the insertion hole 21 . The state shown in FIGS. 1 to 4 is the state before the connected device 1 is used, and in the following description, this state is also referred to as the "initial state".

The elastic member 4 in the initial state (that is, the insertion hole closed state) is slightly bent in the direction in which the fixed portion 42 and the movable portion 43 approach each other. This can prevent the elastic member 4 from coming off the case 2 . In addition, when a wire is held between the elastic member 4 and the terminal portion 31, even if the wire is relatively thin, a sufficient holding force (that is, a grip force) can be exerted.

The test hole 28 described above is located at a position facing the bent portion 41 of the elastic member 4 . An operator electrically connects the probe and the terminal portion 31 via the conductive elastic member 4 by inserting a probe or the like of a measuring device into the test hole 28 of the connecting device 1 in the initial state and bringing it into contact with the elastic member 4 . can be directly connected. Then, the electrical performance of the connection device 1 can be measured by the measuring device.

The operating portion 5 includes a cam portion 51. The cam portion 51 is a substantially rectangular plate-like member when viewed from the front. A first through hole 511 and a second through hole 512 are provided in the central portion of the cam portion 51 . The second through hole 512 is positioned above the first through hole 511 in FIG. The first through-hole 511 and the second through-hole 512 respectively penetrate the cam portion 51 in the thickness direction. The shape of the first through-hole 511 in plan view is a substantially elliptical or substantially oval shape in which the diameter in the horizontal direction in FIG. 4 is larger than the diameter in the vertical direction. The shape of the second through-hole 512 in plan view is a substantially elliptical or substantially oval shape in which the diameter in the horizontal direction in FIG. 4 is larger than the diameter in the vertical direction. In the example shown in FIG. 4 , the lateral width of the second through hole 512 is larger than the lateral width of the first through hole 511 . The lower edge of the second through hole 512 is provided with a locking projection 517 projecting upward.

The rotating shaft 24 provided on the case 2 is inserted into the first through hole 511 of the cam portion 51 . The rotating shaft 24 is a substantially cylindrical portion extending in the thickness direction. The cam portion 51 is supported by the case 2 so as to be rotatable about the rotating shaft 24 in a plane substantially perpendicular to the thickness direction. The cam portion 51 can rotate clockwise in FIG. 4 around the rotating shaft 24 from the initial state shown in FIG. The inner peripheral surface of the first through hole 511 serves as a bearing 516 when the cam portion 51 rotates around the rotating shaft 24 . The inner diameter of the first through hole 511 is larger than the outer diameter of the rotating shaft 24 . In the initial state shown in FIG. 4 , the rotating shaft 24 is positioned leftwardly within the first through hole 511 .

A support portion 25 provided on the case 2 is inserted into the second through hole 512 of the cam portion 51 . The support portion 25 is a substantially cylindrical portion extending in the thickness direction. The support portion 25 supports the cam portion 51 in a non-connected state, which will be described later. The outer diameter of the support portion 25 is smaller than the inner diameter of the second through hole 512 . In the initial state shown in FIG. 4 , the support portion 25 is positioned rightward within the second through hole 512 . A lower end portion of the support portion 25 is provided with a locking convex portion 251 projecting downward. The locking projection 251 restricts the displacement of the cam portion 51 by engaging with the locking projection 517 of the second through-hole 512 of the cam portion 51 in the unconnected state described later.

In the cam portion 51, the portion 54 surrounding the first through-hole 511 and the second through-hole 512 (the portion marked with parallel oblique lines in FIG. 4) protrudes forward in the thickness direction from the surrounding portions. In the following description, the portion 54 is also called "first projecting portion 54". The first projecting portion 54 surrounds the first through hole 511 and the second through hole 512 along the entire circumference. In the cam portion 51, a second projecting portion 55 is provided at a position spaced downward in FIG. The shape of the second projecting portion 55 in plan view is substantially fan-shaped.

The cam portion 51 includes a cam lower convex portion 52 and a cam upper convex portion 53 . The cam lower convex portion 52 is a portion positioned below the first through-hole 511 and the first projecting portion 54 in FIG. The shape of the cam lower convex portion 52 when viewed from the front is substantially an inverted triangle. The cam lower protrusion 52 extends downward from the lower portions of the first through hole 511 and the first protrusion 54 . The surface on the front side of the lower cam protrusion 52 is positioned further to the rear than the surface on the front side of the first protrusion 54 . The cam upper convex portion 53 is a portion that protrudes rightward from the upper right end portion of the cam portion 51 in FIG. The shape of the cam upper protrusion 53 when viewed from the front is substantially triangular. The surface on the front side of the upper cam projection 53 is positioned further to the rear than the surface on the front side of the first projection 54 .

In the initial state shown in FIG. 4, the left side surface of the lower cam protrusion 52 is in surface contact with the movable portion 43 of the elastic member 4 from the right side and above. In addition, the terminal portion 31 is positioned in front of the lower cam protrusion 52, and the lower cam protrusion 52 and the terminal portion 31 overlap when viewed from the front. In the initial state shown in FIG. 4 , the second projecting portion 55 of the cam portion 51 is positioned above the terminal portion 31 and is in contact with the upper surface of the terminal portion 31 . This prevents the cam portion 51 from rotating counterclockwise from the initial state.

Next, the flow of wire connection to the connection device 1 will be described. First, the cam portion 51 is rotated clockwise around the rotation shaft 24 from the initial state shown in FIG. When the cam portion 51 is rotated, for example, as shown in FIG. 11, an operator inserts the tip of a tool 92 such as a normal flathead screwdriver through the operation hole 27 provided on the upper surface of the case 2. , the operation unit 5 in the initial state. Specifically, the tip of the tool 92 contacts the upper surface of the first projecting portion 54 of the cam portion 51 . A contact portion between the tool 92 and the operating portion 5 is located on the right side of the rotating shaft 24 . By pushing the tool 92 downward, the cam portion 51 rotates clockwise. When the cam portion 51 rotates clockwise from the initial state, the movable portion 43 of the elastic member 4 is pushed downward, causing the elastic member 4 to bend. It acts on the part that comes into contact with

FIG. 12 is a diagram showing a state in which the cam portion 51 is rotated clockwise by about 10° from the initial state (see FIG. 11). The state shown in FIG. 12 is a state in which the operation unit 5 is in the middle of rotation, and is not a connected state or a non-connected state, which will be described later. As shown in FIGS. 11 and 12, by rotating the cam portion 51 clockwise, the shortest distance between the contact portion between the cam portion 51 and the movable portion 43 of the elastic member 4 and the center of the rotating shaft 24 is increases. When the shortest distance increases and a downward force is applied from the cam portion 51 to the elastic member 4, the elastic member 4 bends and deforms. Specifically, the movable portion 43 of the elastic member 4 is pushed downward and separated downward from the terminal portion 31 .

In the state shown in FIG. 12 , a portion of the cam lower protrusion 52 of the cam portion 51 that is slightly upper left than the lower end contacts the movable portion 43 of the elastic member 4 , and the restoring force of the elastic member 4 is exerted on that portion. works. In the following description, a portion of the operation portion 5 on which the restoring force of the elastic member 4 acts is referred to as a "first portion 513". The first portion 513 moves on the cam portion 51 as the cam portion 51 rotates. As described above, when the shortest distance between the first portion 513 and the center of the rotating shaft 24 (hereinafter also simply referred to as “the distance between the first portion 513 and the rotating shaft 24”) increases, the cam portion 51 is pushed upward by the restoring force, and the lower portion of first projecting portion 54 is pressed against the lower end portion of rotating shaft 24 . A reaction force against the restoring force of the elastic member 4 is generated in the lower portion of the first projecting portion 54 (more specifically, the lower end portion of the inner peripheral surface of the first through hole 511 that is part of the bearing 516). In the following description, the portion of the operating portion 5 that is pressed against the rotating shaft 24 by the restoring force of the elastic member 4 and generates a reaction force (that is, part of the bearing 516) is referred to as a "third portion 515." .

In FIG. 12, the vector of the restoring force of the elastic member 4 acting on the first portion 513 of the operating portion 5 (hereinafter also referred to as "restoring force vector") is indicated by a bold arrow with reference numeral 81. A second reference line 83, which is an imaginary straight line connecting the first portion 513 and the third portion 515, is indicated by a chain double-dashed line. Note that the reaction force described above acts from the third portion 515 along the second reference line 83 . In other words, the reaction force vector extends from the third portion 515 onto the second reference line 83 . The third portion 515 is a portion of the bearing 516 of the operation portion 5 as described above, and more specifically, the portion of the bearing 516 that is in contact with the lower end portion of the rotating shaft 24 . As with the first portion 513 , the third portion 515 also moves on the bearing 516 as the cam portion 51 rotates.

In the state shown in FIG. 12, the restoring force vector 81 does not overlap the second reference line 83, and is tilted to the right of the second reference line 83 and is directed upward. Therefore, the restoring force of the elastic member 4 acts on the cam portion 51 with a rotational moment in the counterclockwise direction. That is, in the state shown in FIG. 12, unless the operator continues to apply force to push down the cam portion 51 with the tool 92, the elastic member 4 and the operation portion 5 return to the initial state shown in FIG.

In the actual operation, the operator does not keep the operation unit 5 stationary in the state shown in FIG. 12, but further rotates it to the state shown in FIG. 13 (hereinafter also referred to as "unconnected state"). 12, the first portion 513 approaches the lower end of the cam lower convex portion 52, and the distance between the first portion 513 and the rotating shaft 24 increases. increase further. As a result, the movable portion 43 of the elastic member 4 is further pushed downward, and is largely separated downward from the terminal portion 31 . As a result, an insertion path for the electric wire extending from the insertion hole 21 to the inside of the case 2 is opened. Also, the angle formed by the restoring force vector 81 and the second reference line 83 becomes smaller as the operation unit 5 rotates clockwise, and the restoring force vector 81 approaches the second reference line 83 . As a result, the counterclockwise rotational moment acting on the cam portion 51 due to the restoring force of the elastic member 4 is reduced.

When the operating portion 5 rotates from the initial state shown in FIG. 11 to the disconnected state shown in FIG. In other words, the rotating shaft 24 relatively moves rightward within the first through hole 511 . That is, the third portion 515 in which the reaction force described above is generated moves rightward on the inner peripheral surface of the first through hole 511 (that is, the bearing 516). Also, the second through hole 512 of the cam portion 51 moves to the right with respect to the support portion 25 . In other words, the support portion 25 relatively moves leftward within the second through hole 512 .

In the unconnected state shown in FIG. 13, the lower portion of the inner peripheral surface of the second through hole 512 contacts the support portion 25 from below. On the other hand, the inner peripheral surface of the first through hole 511 (that is, the bearing 516) is separated from the rotating shaft 24. As shown in FIG. As a result, the lower portion of the inner peripheral surface of the second through hole 512 is pressed against the support portion 25 by the restoring force of the elastic member 4 via the cam portion 51 . The restoring force is not applied to the rotating shaft 24 but is supported by the supporting portion 25 . Therefore, the portion of the operation portion 5 where the reaction force against the restoring force is generated moves from the third portion 515 (see FIG. 12) to the portion of the inner peripheral surface of the second through hole 512 that contacts the support portion 25 (hereinafter referred to as (referred to as “second portion 514”). Note that the first portion 513, the second portion 514, and the third portion 515 are different portions.

The reaction force in the unconnected state acts from the second portion 514 along the first reference line 82 which is an imaginary straight line connecting the second portion 514 and the first portion 513 . In other words, the reaction force vector extends from the second portion 514 onto the first reference line 82 . In the example shown in FIG. 13, the first reference line 82 is longer than the second reference line 83 (see FIG. 12). In the non-connected state, the inner peripheral surface of the first through hole 511 may be in contact with the rotating shaft 24, but the restoring force of the elastic member 4 via the cam portion 51 is applied to the support portion 25 as described above. , and does not substantially join the rotating shaft 24 .

In the unconnected state shown in FIG. 13 , the lower end of the cam lower convex portion 52 of the cam portion 51 is the first portion 513 that contacts the movable portion 43 of the elastic member 4 . A restoring force vector 81 from the first portion 513 substantially overlaps the first reference line 82 , and the restoring force of the elastic member 4 and the reaction force generated in the operating portion 5 against the restoring force are balanced. Therefore, neither the clockwise rotational moment nor the counterclockwise rotational moment acts on the cam portion 51 . Therefore, even if the operator releases the operation part 5 (that is, even if the operator does not apply force to the operation part 5), the position of the operation part 5 in the circumferential direction (that is, the rotational position) does not change. are maintained in the unconnected state shown in FIG. The state of the elastic member 4 is also maintained in a non-connected state (that is, temporarily fixed). The movable portion 43 of the elastic member 4 extends substantially tangentially to the cam portion 51 at the first portion 513 . The unconnected state shown in FIG. 13 is a temporarily fixed state in which the elastic member 4 is temporarily fixed in a bent state.

In the unconnected state, the locking projection 517 of the second through hole 512 engages with the locking projection 251 of the support portion 25 . As a result, the movement of the cam portion 51 is restricted so that the cam portion 51 does not rotate clockwise any more. Also, the right end portion of the first projecting portion 54 of the cam portion 51 contacts the case 2 . This also restricts the movement of the cam portion 51 so that the cam portion 51 does not rotate clockwise any more.

In the unconnected state, the second projecting portion 55 of the cam portion 51 contacts the upper portion of the releasing portion 32 of the terminal fitting 3 from the right side. Further, a cam upper convex portion 53 that is a part of the operation portion 5 protrudes rightward from the right side surface of the case 2 through the slit 29 (see FIG. 3). The cam upper protrusion 53 protruding from the case 2 can be visually recognized by the operator. Therefore, the operator can easily determine whether or not the connected device 1 is in the disconnected state. In the initial state described above, the cam upper protrusion 53 does not protrude from the case 2 and is located inside the case 2 .

FIG. 14 is a diagram conceptually showing the relationship between the amount of displacement of the operating portion 5 from the initial state and the rotational moment acting on the operating portion 5 due to the restoring force of the elastic member 4. As shown in FIG. The horizontal axis in FIG. 14 represents the amount of displacement (that is, the rotation angle) of the operation unit 5 from the initial state around the rotation shaft 24, and the rotation angle in the clockwise direction in FIG. 11 is positive. The vertical axis in FIG. 14 indicates the above-described rotational moment, and the moment in the counterclockwise direction in FIG. 11 is positive. A point denoted by reference numeral 85 in FIG. 14 is an unconnected state in which the rotational moment is approximately zero. Note that the change in the rotational moment actually acting on the operating portion 5 does not necessarily have to be the same as the change in the rotational moment indicated by the straight line in FIG.

When the connection device 1 is brought into a disconnected state, the operator pulls out the tool 92 (see FIG. 13) from the operation hole 27 and inserts the electric wire 91 into the insertion hole 21, as shown in FIG. The electric wire 91 is inserted into the case 2 from the insertion hole 21 along a predetermined insertion direction, and positioned between the terminal portion 31 and the unconnected elastic member 4 . The direction in which the electric wire 91 is inserted into the case 2 is an oblique direction that is inclined with respect to the up-down direction and the left-right direction. As a result, it is possible to prevent the electric wire 91 from protruding in the vertical direction from the connection device 1 and to easily insert the electric wire 91 into the insertion hole 21 while visually checking the insertion hole 21 . The angle between the insertion direction and the vertical direction can be appropriately optimized according to the location where the connection device 1 is assumed to be used, the position of the operator, the line of sight, and the like.

The electric wire 91 may be, for example, a single wire or a relatively thick stranded wire. Alternatively, the electric wire 91 may be an electric wire in which a rod-shaped crimp terminal or the like is provided at the tip of a relatively thin stranded wire. The rod-shaped crimp terminal may be a crimp terminal with an insulation coating provided with an insulation sleeve or the like at the base of the rod-shaped conductive portion, or may be a bare crimp terminal without an insulation sleeve or the like. The diameter of the tip of the electric wire 91 may be changed variously according to the current capacity of the connection device 1 to which the electric wire 91 is connected. Also, the diameter of the portion other than the tip portion of the electric wire 91 may be changed variously. As will be described later, when the electric wire 91 is used to press the releasing portion 32, the diameter of the electric wire 91 is desirably equal to or greater than a diameter capable of securing the load for the pressing.

The tip of the electric wire 91 contacts the release portion 32 of the terminal fitting 3 inside the case 2 . In the example shown in FIG. 15 , the tip of the wire 91 directly contacts the right side surface of the lower portion of the releasing portion 32 . That is, the right side surface of the lower portion of the releasing portion 32 is a receiving surface for receiving the electric wire 91 . The receiving surface is positioned deeper than the unconnected elastic member 4 in the insertion direction of the electric wire 91 .

The operator slightly pushes the wire 91 in the insertion direction while the tip of the wire 91 is in direct contact with the release portion 32 . As a result, the lower portion of the release portion 32 is pressed substantially leftward, and the release portion 32 slightly rotates clockwise around the connection portion with the release connection portion 34 (see FIGS. 6 to 8). As a result, the upper portion of the release portion 32 contacting the second projecting portion 55 of the cam portion 51 is slightly displaced to the right, and the second projecting portion 55 is pushed rightward by the upper portion of the releasing portion 32 . The upper portion of the releasing portion 32 is slightly separated from the second projecting portion 55 before the electric wire 91 is pressed, and is displaced rightward by the pressing of the electric wire 91 to come into contact with the second projecting portion 55 . good too.

13 to the position shown in FIG. 15 from the position shown in FIG. 13 to the position shown in FIG. Rotate slightly in the direction That is, the position (that is, the rotational position) of the operating portion 5 is changed by transmitting force from the electric wire 91 to the operating portion 5 . In the state shown in FIG. 15, the relative position of the rotating shaft 24 with respect to the first through hole 511 is slightly shifted to the left from the unconnected state shown in FIG.

As shown in FIG. 15 , when the cam portion 51 rotates slightly counterclockwise from the unconnected state, the restoring force vector 81 deviates to the right from the first reference line 82 , and the restoring force of the elastic member 4 causes the cam portion 51 A counterclockwise rotational moment acts on (corresponding to point 86 in FIG. 14). As a result, the cam portion 51 is further rotated counterclockwise, and the elastic member 4 is restored from the unconnected state. As the cam portion 51 rotates counterclockwise, the support portion 25 separates from the inner peripheral surface of the second through hole 512 of the cam portion 51 and moves rightward relative to the second through hole 512 . It moves, and the rotating shaft 24 contacts the inner peripheral surface (that is, the bearing 516) of the 1st through-hole 511 of the cam part 51. As shown in FIG. Further, the rotary shaft 24 moves leftward relative to the first through hole 511 of the cam portion 51 .

In other words, when the cam portion 51 is displaced relative to the rotating shaft 24 and the supporting portion 25 , the pressing force of the second portion 514 on the supporting portion 25 is released, and the third portion 515 moves against the rotating shaft 24 . is pressed down. As a result, the portion of the operating portion 5 where the reaction force against the restoring force of the elastic member 4 is generated shifts from the second portion 514 to the third portion 515, and the above-described second reference line 83 is generated. In the example shown in FIG. 15 , the second reference line 83 is shifted leftward from the restoring force vector 81 . Further, the second reference line 83 is inclined to the left side of the first reference line 82, and the deviation between the second reference line 83 and the restoring force vector 81 is the deviation between the first reference line 82 and the restoring force vector 81. be larger than Therefore, the counterclockwise rotational moment acting on the cam portion 51 also increases.

It should be noted that the second reference line 83 does not necessarily have to be inclined to the left side of the first reference line 82, nor does it need to be deviated from the first reference line 82 and the restoring force vector 81. In the above example, the displacement of the cam portion 51 with respect to the rotating shaft 24 is rotation about the rotating shaft 24 and lateral movement (that is, sliding) with respect to the rotating shaft 24, but these displacements are parallel. It may be performed sequentially or sequentially. Alternatively, the displacement of the cam portion 51 with respect to the rotating shaft 24 may be only one of rotation about the rotating shaft 24 and lateral movement with respect to the rotating shaft 24 .

By generating the second reference line 83 in this manner, the cam portion 51 is further rotated in the counterclockwise direction, the elastic member 4 is further restored, and the movable portion 43 is displaced upward. Then, as shown in FIG. 16, the elastic member 4 shifts to a connected state in which the wire 91 is sandwiched between the terminal portion 31 and the wire 91 and the terminal portion 31 are electrically and mechanically connected. . In other words, after the wire 91 is inserted into the connection device 1, the wire is connected automatically (that is, without the operator using a tool other than the wire 91 or operating the operation unit 5 with his or her fingers).

For example, the operator may recognize the transition to the connected state from the vibration or sound generated when the electric wire 91 is pressed against the terminal portion 31 by the movable portion 43 of the elastic member 4 . The vibration or sound is generated, for example, when one member among the elastic member 4, the electric wire 91, the terminal portion 31, the operation portion 5 and the case 2 collides with another member. The connection device 1 may adopt various structures for promoting the generation of the vibration, sound, or the like, or for amplifying the vibration, the sound, or the like.

As shown in FIG. 16, in the connected device 1 in the connected state, the cam upper convex portion 53 of the cam portion 51 does not protrude from the case 2 and is positioned inside the case 2 . In this way, the cam upper convex portion 53 (see FIG. 13), which protrudes rightward from the case 2 in the unconnected state, returns to the inside of the case 2 and disappears. State transitions can be recognized. That is, the cam upper convex portion 53 is a visible identification portion (indicator) that indicates the position of the operation portion 5 and indicates whether or not the connected device 1 is in the disconnected state.

It should be noted that when the connected device 1 is shifted from the unconnected state to the connected state, it is not always necessary to rotate the cam portion 51 counterclockwise by pressing the lower portion of the release portion 32 with the electric wire 91 . For example, in the unconnected state shown in FIG. 13, the cam portion 51 is rotated counterclockwise by moving the cam upper projection 53 projecting rightward from the case 2 upward with a fingertip of the operator. You may let In this manner, the connection device 1 allows manual connection of the electric wire 91 .

When removing the electric wire 91 from the connection device 1 in the connected state shown in FIG. 16, the cam portion 51 is rotated clockwise from the position shown in FIG. As a result, the movable portion 43 of the elastic member 4 is pushed down and separated downward from the wire 91 , and the wire 91 is released from the clamping of the wire 91 by the elastic member 4 and the terminal portion 31 . A worker can easily remove the wire 91 from the connection device 1 by pulling the wire 91 out of the insertion hole 21 . Thereafter, when the tool 92 is removed from the operation hole 27, the cam portion 51 rotates counterclockwise due to the restoring force of the elastic member 4 and returns to the initial state shown in FIG.

In the connection device 1, the operation hole 27 into which the tool 92 is inserted and the insertion hole 21 into which the electric wire 91 is inserted are provided on different side surfaces of the case 2. is different. Therefore, interference between the tool 92 and the electric wire 91 can be prevented, and the removal of the electric wire 91 from the connection device 1 can be facilitated.

As described above, the connection device 1 to which the electric wire 91 is connected includes the case 2 , the terminal portion 31 , the elastic member 4 and the operation portion 5 . A conductive terminal portion 31 is fixed to the case 2 . The elastic member 4 is attached to the case 2 and presses the electric wire 91 against the terminal portion 31 by a restoring force to sandwich it. The operating portion 5 applies a force to the elastic member 4 to bend the elastic member 4 from the initial state to the non-connected state and maintain the non-connected state. The operating portion 5 includes a first portion 513 , a second portion 514 and a third portion 515 . The restoring force of the elastic member 4 acts on the first portion 513 . A reaction force against the restoring force is generated in the second portion 514 in the unconnected state. The third portion 515 is a portion different from the first portion 513 and the second portion 514 .

Let the vector of the restoring force be a restoring force vector 81 . A straight line connecting the first portion 513 and the second portion 514 is defined as a first reference line 82 . A straight line connecting the first portion 513 and the third portion 515 is defined as a second reference line 83 . When the elastic member 4 is in the unconnected state, the restoring force vector 81 substantially overlaps with the first reference line 82 and the restoring force and the reaction force are balanced. The state is maintained in the disconnected state. Further, when the position of the operating portion 5 is changed while the electric wire 91 is inserted between the terminal portion 31 and the elastic member 4 in the unconnected state, the portion of the operating portion 5 where the reaction force is generated is the second position. By moving from the portion 514 to the third portion 515 , the second reference line 83 is generated, and the elastic member 4 is restored from the non-connected state by the restoring force, and the wire 91 is sandwiched between the wire 91 and the terminal portion 31 . move to state.

As described above, in the connection device 1, there are a portion (that is, the second portion 514) in which the reaction force is generated in the unconnected state and a portion (that is, the third portion 515) in which the reaction force is generated when the position of the operating portion 5 is changed. different. This reduces the contact area between the second part 514 and the case 2 in the disconnected state, reduces the frictional resistance between the operation unit 5 and the case 2, and reduces the force required to cancel the disconnected state. can do. Moreover, the contact area between the third portion 515 and the case 2 can be increased when the position of the operating portion 5 is changed, so that the operating portion 5 can be stably supported when the position is changed. That is, in the connection device 1, it is possible to achieve both a reduction in the force required to release the unconnected state and stable support of the operation unit 5 when the position is changed.

It should be noted that, in the connected device 1, as described above, the restoring force vector 81 should roughly overlap the first reference line 82 in the unconnected state, and does not need to match exactly. For example, when the restoring force vector 81 shown in FIG. 13 is slightly inclined to the right side of the first reference line 82 (that is, the rotational moment acting on the cam portion 51 is slightly larger than the point 85 shown in FIG. 14). 86), it is sufficient that the non-connected state is maintained by the frictional force or the like generated between the cam portion 51 and the elastic member 4. FIG. Even in this case, as described above, the connection device 1 capable of reducing the force required to release the unconnected state and stably supporting the operation unit 5 when the position is changed is realized. can do.

As described above, the operating portion 5 preferably has the cam portion 51 that rotates around the rotating shaft 24 provided on the case 2 . The cam portion 51 includes a bearing 516 having an inner diameter larger than the outer shape of the rotating shaft 24 . The rotating shaft 24 is inserted into the bearing 516 . When the elastic member 4 is shifted to the non-connected state, the cam portion 51 rotates around the rotating shaft 24, thereby increasing the distance between the first portion 513 and the rotating shaft 24 and bending the elastic member 4. . The restoring force of the elastic member 4 presses the second portion 514 against the support portion 25 provided on the case 2 , and the restoring force vector 81 substantially overlaps the first reference line 82 . The rotational position of 5 is maintained, and the state of the elastic member 4 is maintained in the unconnected state. Further, when connecting the electric wire 91 , the cam portion 51 is displaced with respect to the support portion 25 to release the pressure of the second portion 514 against the support portion 25 . As a result, the third portion 515 which is a part of the bearing 516 is pressed against the rotating shaft 24 , and the portion where the reaction force is generated in the operating portion 5 shifts from the second portion 514 to the third portion 515 .

As a result, it is possible to realize, with a simple structure, the connection device 1 capable of reducing the force required to release the unconnected state and stably supporting the operation unit 5 when the position is changed. . Further, in this structure, increasing the contact area between the third portion 515 and the case 2 when changing the position of the operating portion 5 means increasing the diameter of the rotating shaft 24 . Deformation and breakage of 24 can be suitably suppressed.

As described above, preferably, when connecting the electric wire 91 , force is transmitted from the inserted electric wire 91 to the operating portion 5 , thereby changing the position of the operating portion 5 and generating a reaction force in the operating portion 5 . The resulting site transitions from the second site 514 to the third site 515 . Thereby, automatic wire connection of the electric wire 91 can be realized.

As described above, preferably, when connecting the electric wire 91 , the connection device 1 is pressed by the inserted electric wire 91 and displaced, thereby contacting the operation portion 5 and changing the position of the operation portion 5 . A portion 32 is further provided. As a result, automatic wire connection of the electric wire 91 can be realized with a simple structure. Moreover, it is preferable that the release portion 32 is a member that is connected to the terminal portion 31 . Thereby, the number of parts of the connection device 1 can be reduced. Further, the release portion 32 has a receiving surface (in the above example, the lower right side surface of the release portion 32) that comes into direct contact with the tip of the electric wire 91. As shown in FIG. Thereby, the force for pushing the wire 91 can be efficiently transmitted to the operation portion 5 .

As described above, it is preferable that a part of the operating portion 5 (in the above example, the cam upper convex portion 53) protrude from the case 2 in the unconnected state. As a result, the operator can directly touch the operation unit 5 with a fingertip or the like without using the electric wire 91, a tool, or the like. Therefore, the operator can directly apply a force to the operating portion 5 to displace the operating portion 5 and shift from the unconnected state to the connected state. In other words, manual connection of the electric wire 91 by the operator can be facilitated. As a result, for example, even if the wire 91 is thin and it is difficult to transmit force to the operation unit 5 via the wire 91, the connection of the wire 91 (that is, the transition from the unconnected state to the connected state) can be easily performed. It can be carried out.

As described above, it is preferable that the connected device 1 is provided with a visible identification portion (in the above example, the cam upper convex portion 53) that indicates the position of the operation portion 5. Accordingly, a worker or the like who handles the connection device 1 can easily recognize the state of the connection device 1 (that is, whether it is in the disconnected state or not). Further, when the identifying portion is a part of the operating portion 5 that protrudes from the case 2 in the unconnected state (in the above example, the cam upper convex portion 53), the portion of the operating portion 5 is used for state identification. Since it is used both as a structure and a structure for manual connection, the structure of the connection device 1 can be simplified.

As described above, the elastic member 4 is preferably a leaf spring. Thereby, the structure of the connection device 1 can be further simplified.

As described above, in the connection device 1, before the electric wire 91 is inserted, the restoring force vector 81 substantially overlaps with the first reference line 82 in the unconnected state (that is, when the elastic member 4 rotates the cam portion 51). 17, the restoring force vector 81 is slightly tilted to the left with respect to the first reference line 82, as shown in FIG. , the position of the operation unit 5 may be maintained.

In the state shown in FIG. 17, the rotational moment acting on the cam portion 51 is clockwise, and the relationship between the amount of displacement (that is, rotation angle) of the operating portion 5 from the initial state and the rotational moment acting on the operating portion 5. 18, point 86 (that is, connected state) and point 85 (that is, state where restoring force vector 81 overlaps with first reference line 82) are shown at point 87 located to the lower right. Become. Therefore, a force to rotate the cam portion 51 clockwise acts on the cam portion 51 from the elastic member 4, and the cam portion 51 is rotated counterclockwise to return to the connected state or the initial state. force does not work.

Note that in the example shown in FIG. 17 , the locking projection 517 of the second through hole 512 engages with the locking projection 251 of the support portion 25 . As a result, the movement of the cam portion 51 is restricted so that the cam portion 51 does not rotate clockwise any more. Also, the right end portion of the first projecting portion 54 of the cam portion 51 contacts the case 2 . This also restricts the movement of the cam portion 51 so that the cam portion 51 does not rotate clockwise any more.

17, the electric wire 91 (see FIG. 15) inserted into the insertion hole 21 moves the cam portion 51 through the release portion 32 in substantially the same manner as described above. A counterclockwise force is applied. As a result, the restoring force vector 81 shifts from the left side of the first reference line 82 to the right side as shown in FIG. 15, and the cam portion 51 rotates counterclockwise.

As described above, in the example shown in FIG. 17 , the restoring force vector 81 is slightly inclined to one side with respect to the first reference line 82 in the unconnected state. , there is a transition from the one side of the first reference line 82 to the other side. Thereby, the non-connected state can be maintained more stably.

Various modifications are possible in the connection device 1 described above.

For example, in the connection device 1, the elastic member 4 is not limited to a leaf spring, and may have another structure (for example, a coiled spring).

In the connected device 1, as described above, the cam upper convex portion 53 of the operation portion 5 has the function of the identification portion, but other portions of the operation portion 5 or portions other than the operation portion 5 It may be a visible identification portion that indicates the position. Alternatively, the identification section may not necessarily be provided.

In the connected device 1, a part of the operation unit 5 does not necessarily need to protrude from the case 2 in the disconnected state. For example, regardless of the state of the connected device 1 , the entire operating section 5 may be positioned within the case 2 , or a portion of the operating section 5 may always protrude from the case 2 .

The release portion 32 does not necessarily have to be a member connected to the terminal portion 31, and may be a separate member from the terminal portion 31.

In the operation section 5, the shape and structure of the cam section 51 are not limited to the above examples, and may be changed as appropriate. Further, the operation unit 5 does not necessarily have to include the cam portion 51 , and the initial state, the unconnected state, and the connected state of the connected device 1 may be realized by a structure other than the cam portion 51 .

The connection device 1 described above may be used to connect wires in various devices. The connection device 1 may be used as part of various electronic devices. Examples of electronic devices including the connection device 1 include relay sockets, relay modules, operation switches, control units, RFID (radio frequency identification) readers, switching power supplies, programmable controllers, low-voltage circuit breakers, electromagnetic switches, circuit protectors, An electromagnetic contactor, an electromagnetic relay, an inverter device, etc. are mentioned.

The configurations in the above embodiment and each modification may be combined as appropriate as long as they do not contradict each other.

Although the invention has been described in detail, the above description is illustrative and not limiting. Accordingly, many modifications and variations are possible without departing from the scope of the present invention.

Reference Signs List 1 connected device 2 case 4 elastic member 5 operation portion 24 rotating shaft 25 support portion 31 terminal portion 32 release portion 51 cam portion 53 cam upper convex portion 81 restoring force vector 82 first reference line 83 second reference line 91 electric wire 513 first first reference line Part 514 Second part 515 Third part 516 Bearing

Claims (9)

1. A connection device to which an electric wire is connected,
   a case;
   a conductive terminal portion fixed to the case;
   an elastic member that is attached to the case and presses and clamps the electric wire against the terminal portion by a restoring force;
   an operation unit that applies a force to the elastic member to bend it from an initial state to a non-connected state and maintain the non-connected state;
   with
   The operation unit is
   a first portion on which the restoring force of the elastic member acts;
   a second portion that generates a reaction force against the restoring force in the unconnected state;
   a third portion different from the first portion and the second portion;
   with
   Let the vector of the restoring force be the restoring force vector, let the straight line connecting the first part and the second part be the first reference line, and let the straight line connecting the first part and the third part be the second reference line. ,
   When the elastic member is in the unconnected state, the restoring force vector substantially overlaps with the first reference line and the restoring force and the reaction force are balanced, thereby maintaining the position of the operating portion and the elastic member. The state of the member is maintained in the unconnected state,
   When the position of the operation portion is changed in a state where the electric wire is inserted between the terminal portion and the elastic member in the unconnected state, the portion of the operation portion where the reaction force is generated is the second elastic member. The second reference line is generated by moving from the portion to the third portion, and the elastic member restores from the non-connected state by the restoring force, and the wire is connected to sandwich the electric wire between itself and the terminal portion. move to state.
2. The connection device according to claim 1,
   The operation unit includes a cam portion that rotates around a rotation shaft provided on the case,
   the cam portion includes a bearing into which the rotating shaft is inserted and which has an inner diameter larger than the outer diameter of the rotating shaft;
   When the elastic member is shifted to the unconnected state, the cam portion rotates around the rotating shaft, thereby increasing the distance between the first portion and the rotating shaft and bending the elastic member. The restoring force of the elastic member presses the second portion against the support portion provided in the case, and the restoring force vector substantially overlaps with the first reference line, so that the operating portion the rotational position of is maintained and the state of the elastic member is maintained in the unconnected state;
   When connecting the electric wire, by displacing the cam portion with respect to the support portion and releasing the pressure of the second portion against the support portion, the third portion, which is a part of the bearing, is moved. The portion that is pressed against the rotating shaft and generates the reaction force in the operating portion shifts from the second portion to the third portion.
3. The connection device according to claim 1 or 2,
   The restoring force vector is slightly inclined to one side with respect to the first reference line in the non-connected state, and when transitioning from the non-connected state to the connected state, the Transition from one side to the other.
4. The connection device according to any one of claims 1 to 3,
   When the electric wire is connected, force is transmitted from the inserted electric wire to the operating portion, whereby the position of the operating portion is changed, and the portion where the reaction force is generated in the operating portion is the second portion. to the third portion.
5. The connection device according to claim 4,
   further comprising a release portion that contacts the operation portion and changes the position of the operation portion by being pressed and displaced by the inserted wire when the wire is connected,
   The release portion is a member connected to the terminal portion.
6. The connection device according to any one of claims 1 to 5,
   In the disconnected state, a portion of the operating portion protrudes from the case.
7. The connection device according to any one of claims 1 to 6,
   A visible identification portion indicating the position of the operation portion is provided.
8. The connection device according to any one of claims 1 to 7,
   The elastic member is a leaf spring.
9. an electronic device,
   A connection device according to any one of claims 1 to 8 is provided.

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