Patent Description:
A push-in connection type terminal block that simplifies the connection of electric wires is known, which has a mechanism that when the electric wire with its coating removed is inserted from an insertion port provided in a housing, the electric wire is fixed in contact with the metal parts provided inside.

Further, Patent Literature <NUM> discloses a terminal block that allows a user to easily recognize from the outside that an electric wire is connected by a display through a window part. The terminal block of Patent Literature <NUM> is configured so that when an electric wire is inserted, it is pushed by the end of the electric wire to move the movable member, and the display part provided as a part of the movable member moves to a position visible from the window part.

Patent Literature <NUM> discloses a terminal block having a mechanism for locking a movable part of a leaf spring for fixing an electric wire. In the terminal block of Patent Literature <NUM>, it is configured that when a part of the mechanism inside the housing is pushed by the tip of a tool or the like, the leaf spring is locked with the electric wire released, and the electric wire can be easily removed.

<CIT> discloses a terminal block comprising: a housing provided with an accommodating part; and a movable member, a leaf spring, wherein the housing is provided with a window part and an insertion part for inserting an electric wire, wherein the leaf spring is provided with a fixed part and a plate-shaped movable part that is movable with respect to the housing, wherein the movable member is provided with a display part, a block part moving in conjunction with the display part, and an urging part, wherein the urging part applies an urging force to the block part in a direction substantially opposite to an insertion direction of the electric wire, and wherein when the electric wire is inserted into the housing through the insertion part, an end of the electric wire pushes the block part, and an end of the movable part is pressed against a side surface of the electric wire, and the electric wire is fixed, and a visible state of the display part through the window part changes due to a change in a position of the display part moving in conjunction with the block part.

Generally, in a push-in connection type terminal block, it is necessary to insert the electric wire while pushing the movable part of the leaf spring for fixing the electric wire against the urging force, and there is a problem that the electric wire cannot be inserted smoothly. This problem also applies to the terminal block of the conventional technology described in Patent Literature <NUM>.

In addition, the conventional terminal block described in Patent Literature <NUM> is provided with a mechanism for locking the movable part of the leaf spring, so the problem is solved. However, when the electric wire is connected, the lock is suddenly released and the electric wire is fixed in a state without the feeling of pushing, so there is a problem that it is difficult to grasp the feeling and sense of the inserted state of the electric wire leading to the fixing.

An embodiment of the disclosure realizes a push-in connection type terminal block in which the feeling of the inserted state of the electric wire leading to the fixing can be easily grasped and the electric wire can be easily inserted.

The disclosure adopts the following configuration in order to solve the above-mentioned issues.

A terminal block according to an aspect of the disclosure includes a housing provided with an accommodating part; and a movable member, a leaf spring, and a locking member disposed in the accommodating part. The housing is provided with a window part and an insertion part for inserting an electric wire. The leaf spring is provided with a fixed part and a plate-shaped movable part that is movable with respect to the housing. The locking member is provided with a claw part for locking the movable part and a contact part moving in conjunction with the claw part. The movable member is provided with a display part, a block part moving in conjunction with the display part, and an urging part, wherein the urging part applies an urging force to the block part in a direction substantially opposite to an insertion direction of the electric wire. When the electric wire is inserted into the housing through the insertion part, an end of the electric wire pushes the block part, and the contact part is further pushed via the block part, whereby locking by the claw part is released, and an end of the movable part is pressed against a side surface of the electric wire, and the electric wire is fixed. A visible state of the display part through the window part changes due to a change in a position of the display part moving in conjunction with the block part.

According to an embodiment of the disclosure, a push-in connection type terminal block may be realized in which the feeling of the inserted state of the electric wire leading to the fixing can be easily grasped and the electric wire can be easily inserted.

Hereinafter, an embodiment according to one aspect of the disclosure (hereinafter also referred to as "this embodiment") will be described.

First, an example of a scenario in which the disclosure is applied will be described. The application example of this embodiment may be applied to a push-in connection type terminal block.

The terminal block according to the application example of this embodiment includes a housing provided with an accommodating part, a movable member, a leaf spring, and a locking member disposed in the accommodating part. The housing is provided with a window part and an insertion part for inserting an electric wire.

The leaf spring is provided with a fixed part (leaf spring fixed part) directly or indirectly fixed to the housing and a plate-shaped movable part (leaf spring movable part) that is movable with respect to the housing. The locking member is provided with a claw part for locking the movable part and a contact part moving in conjunction with the claw part. The movable member is provided with a display part, a block part moving in conjunction with the display part, and an urging part, and the urging part applies an urging force to the block part in a direction substantially opposite to the insertion direction of the electric wire.

In the terminal block according to the application example of this embodiment, when the electric wire is inserted into the housing through the insertion part, the end of the electric wire pushes the block part. Then, the contact part is further pushed via the block part, whereby the locking by the claw part is released, and the end of the movable part (leaf spring movable part) is pressed against the side surface of the electric wire, and the electric wire is fixed.

Further, the visible state of the display part through the window part changes due to the change in the position of the display part moving in conjunction with the block part.

By providing the terminal block according to the application example of this embodiment, it is easy to get a sense of the inserted state of the electric wire leading to the fixing, and it is easy to insert the electric wire. In addition, whether or not the electric wire is in the fixed state can be easily visually recognized from the outside by the display of the window part.

A more specific configuration example of the terminal block in this embodiment will be described with reference to <FIG>. <FIG> are views showing the terminal block <NUM> according to the configuration example of this embodiment, and first, the configuration of the terminal block <NUM> will be described with reference to <FIG>.

<FIG> is a perspective view showing the configuration of the terminal block <NUM>. <FIG> is an exploded perspective view showing the configuration of the terminal block <NUM>. <FIG> is a front view showing the configuration of the terminal block <NUM>. <FIG> and <FIG> show the terminal block <NUM> with a leaf spring movable part <NUM> of a leaf spring <NUM> in a locked state. Further, in <FIG>, the approximate position of the leaf spring movable part <NUM> in an unlocked state is also shown by a dotted line.

The terminal block <NUM> includes a housing <NUM>; and a movable member <NUM>, a leaf spring <NUM>, a locking member <NUM>, and a vertical plate <NUM> disposed in an accommodating part <NUM> which is a hollow part inside the housing <NUM>. The housing <NUM> is made of an insulating material such as resin. As shown in <FIG>, the overall outer shape of the housing <NUM> is a substantially rectangular parallelepiped.

The upper side surface, the left side surface, the lower side surface, and the right side surface of the housing <NUM> are a first side surface <NUM>, a second side surface <NUM>, a third side surface <NUM>, and a fourth side surface <NUM>, respectively. The side surface on the back side and the side surface on the front side of the housing <NUM> a fifth side surface <NUM> and a sixth side surface <NUM>, respectively.

In the specification, the terms "upper," "lower," "right," "left," "front side," "back side" and the like used with reference to the drawings are used to facilitate understanding of the disclosure. The use of these terms does not substantially limit the method of installing the terminal block <NUM>. The terminal block <NUM> according to this embodiment may be installed and used in any direction with respect to a horizontal plane or a vertical surface.

The first side surface <NUM>, the second side surface <NUM>, the third side surface <NUM>, and the fourth side surface <NUM> of the housing <NUM> are each elongated and substantially rectangular, and the housing <NUM> is a thin rectangular parallelepiped with a thin thickness from the front side to the back side as a whole.

No openings are provided in the second side surface <NUM>, the third side surface <NUM>, the fourth side surface <NUM>, and the fifth side surface <NUM> of the housing <NUM>. A large opening is provided on the fifth side surface <NUM> side, which is the side surface on the front side, and configures the accommodating part <NUM>.

The movable member <NUM>, the leaf spring <NUM>, the locking member <NUM>, and the vertical plate <NUM> are assembled in the accommodating part <NUM> through the opening. The movable member <NUM>, the leaf spring <NUM>, the locking member <NUM>, and the vertical plate <NUM> are appropriately provided by a defining wall having a predetermined thickness protruding from the fifth side surface <NUM>, which is the side surface on the back side of the housing <NUM>, toward the front side. A lid part that covers the sixth side surface <NUM>, which is the side surface on the front side of the housing <NUM>, may be further provided to close the accommodating part <NUM>.

On the first side surface <NUM> of the housing <NUM>, a window part <NUM>, a tool opening <NUM>, and an insertion part <NUM>, each of which is an opening leading to the accommodating part <NUM>, are disposed in this order side by side in a line. The window part <NUM> is provided near the second side surface <NUM>. The tool opening <NUM> is provided in the area between the window part <NUM> and the insertion part <NUM>.

The insertion part <NUM> is an opening for inserting an electric wire <NUM> from the outside of the terminal block <NUM>. The insertion part <NUM> is provided near the fourth side surface <NUM>, and the electric wire <NUM> is inserted and removed at a position close to the fourth side surface <NUM>. The insertion direction of the electric wire <NUM> is downward, and the removal direction of the electric wire <NUM> is upward. A wall surface is provided around the inside of the insertion part <NUM> of the housing <NUM> to guide the direction of inserting and removing the electric wire <NUM>.

The leaf spring <NUM> is an open U-shaped member configured by a single metal plate for fixing the electric wire <NUM> at the time of connection. The leaf spring <NUM> is provided with a leaf spring fixed part <NUM>, a leaf spring bent part <NUM>, and a leaf spring movable part <NUM>. The leaf spring bent part <NUM> is a part where the metal plate is bent between the flat plate-shaped leaf spring fixed part <NUM> and the flat plate-shaped leaf spring movable part <NUM>. The end of the leaf spring <NUM> on the leaf spring movable part <NUM> side is a leaf spring movable part end <NUM>.

The leaf spring <NUM> is disposed in the accommodating part <NUM> so that the leaf spring bent part <NUM> faces upward. The leaf spring fixed part <NUM> is fixed to the housing <NUM> by the defining wall from the fifth side surface <NUM>. The elasticity of the metal plate may change the opening angle between the leaf spring fixed part <NUM> and the leaf spring movable part <NUM>, so that the leaf spring movable part <NUM> is movable with respect to the housing <NUM>.

The flat plate-shaped leaf spring movable part <NUM> is disposed diagonally with respect to the insertion direction of the electric wire <NUM>. As shown by the dotted line in <FIG>, when the leaf spring movable part <NUM> is not locked by the locking member <NUM>, a wire end <NUM> is in a position where it collides with the leaf spring movable part <NUM> when the electric wire <NUM> is inserted from the insertion part <NUM>. The leaf spring bent part <NUM> disposed above is in a position where it does not come into contact with the electric wire <NUM>.

The vertical plate <NUM> is a vertically elongated metal plate disposed along the fourth side surface <NUM> from the vicinity of the center in the vertical direction to the vicinity of the lower end of the fourth side surface <NUM>. When the electric wire <NUM> is connected to the terminal block <NUM>, the electric wire <NUM> is fixed to be sandwiched between the leaf spring movable part end <NUM> and the vertical plate <NUM>. The vertical plate <NUM> is provided with a small protrusion <NUM> to prevent slipping when the electric wire <NUM> is fixed.

The leaf spring <NUM> and the vertical plate <NUM> are members that are electrically connected to the electric wire when the electric wire <NUM> is fixed. Wiring members such as lead wires (not shown) electrically connected to at least one of them realizes electrical extraction from the terminal block <NUM>.

The locking member <NUM> is a leaf spring member configured by a single metal plate for locking the leaf spring movable part <NUM>. The locking member <NUM> is disposed in the accommodating part <NUM> at a position close to the third side surface <NUM> below the leaf spring <NUM>. The locking member <NUM> is provided with a locking member fixed part <NUM>, a locking member bent part <NUM>, a locking member movable part <NUM>, and a contact part <NUM>.

The locking member fixed part <NUM> is a part disposed in the vicinity of the third side surface <NUM> and fixed to the housing <NUM>. The locking member bent part <NUM> is a part where the metal plate is bent between the locking member fixed part <NUM> and the locking member movable part <NUM>. The locking member movable part <NUM> is a part movable with respect to the housing <NUM>. The locking member fixed part <NUM>, the locking member bent part <NUM>, and the locking member movable part <NUM> have a substantially J-shaped shape as a whole. The locking member fixed part <NUM> is shorter than the locking member movable part <NUM>.

The locking member movable part <NUM> has a claw part <NUM> at an end opposite to the locking member bent part <NUM>. As shown in <FIG> and <FIG>, the claw part <NUM> may hook on the leaf spring movable part end <NUM> to lock the leaf spring movable part <NUM>.

When the locking member fixed part <NUM> is pushed downward against the urging force of the locking member <NUM> as the leaf spring member, the claw part <NUM> is disengaged from the leaf spring movable part end <NUM>, and the locking of the leaf spring movable part <NUM> is released. The contact part <NUM> moving in conjunction with the locking member movable part <NUM> is connected to the locking member movable part <NUM>. The contact part <NUM> is provided to extend downward from the locking member movable part <NUM> and in a direction away from the locking member bent part <NUM>.

The movable member <NUM> is provided with a display part <NUM>, a vertical bar part <NUM>, a connection part <NUM>, a horizontal bar part <NUM>, a block part <NUM>, and an urging part <NUM>. The display part <NUM> is connected to the connection part <NUM> by the vertical bar part. The connection part <NUM> is connected to the block part <NUM> by the horizontal bar part <NUM>. The display part <NUM> moves in conjunction with the block part <NUM>.

In the accommodating part <NUM>, the vertical bar part <NUM> is disposed along the second side surface <NUM> in a substantially vertical direction (substantially parallel to the insertion direction of the electric wire <NUM>). The horizontal bar part <NUM> is disposed near the third side surface <NUM> in a substantially left-right direction (substantially perpendicular to the insertion direction of the electric wire <NUM>). The part of the movable member <NUM> from the display part <NUM> to the block part <NUM> has a substantially L-shaped shape as a whole bent by the connection part <NUM>.

An urging part <NUM> made of an elastic member such as metal and extending upward is provided near the center of the horizontal bar part <NUM>. The upper end of the urging part <NUM> is bent to form the movable member fixed part <NUM>. The movable member fixed part <NUM> is a part of the movable member <NUM> that is fixed to the housing <NUM>.

The block part <NUM> is a block-shaped part provided at the right end part of the movable member <NUM>. The block part <NUM> is disposed close to the vertical plate <NUM>, and when the electric wire <NUM> is inserted, the upper surface thereof is in a position where it comes into contact with the electric wire end <NUM>. The block part <NUM> has a protrusion <NUM> below the block part <NUM>.

Next, with reference to <FIG>, a method of connecting or removing the electric wire <NUM> to and from the terminal block <NUM> will be described, and the configuration of the terminal block <NUM> will be further described. <FIG> are front views showing the terminal block <NUM>.

<FIG> shows a situation in which the leaf spring movable part <NUM> is locked by the locking member <NUM> (similar to <FIG> and <FIG>) as the initial state of the terminal block <NUM>, and shows the state in which the electric wire <NUM> is inserted halfway from the insertion part <NUM>. When the electric wire <NUM> from which the coating near the end is removed is inserted from the insertion part <NUM>, the electric wire <NUM> is guided downward along the wall surface of the insertion part <NUM>. When the leaf spring movable part <NUM> is locked by the locking member <NUM>, the electric wire <NUM> does not come into contact with the leaf spring movable part <NUM>.

When the electric wire <NUM> is inserted into the depth from the state of <FIG>, the electric wire end <NUM> comes into contact with the upper surface of the block part <NUM> of the movable member <NUM>. Further, in order to insert the electric wire <NUM> from this state, it is necessary to push down the block part <NUM> against the urging force provided by the urging part <NUM> of the movable member <NUM>.

When the electric wire <NUM> is inserted into the interior while pushing down the block part <NUM>, the protrusion <NUM> of the block part <NUM> pushes down the contact part <NUM> of the locking member <NUM>. Then, the claw part <NUM> of the locking member <NUM> is pushed down in conjunction with the contact part <NUM>, and the locking of the leaf spring movable part <NUM> is released.

<FIG> is a view showing a state in which the locking of the leaf spring movable part <NUM> is released by insertion of the electric wire <NUM>. When the locking of the leaf spring movable part <NUM> is released, the leaf spring movable part <NUM> rotates and moves (counterclockwise as viewed from the front side) so that the opening angle between the leaf spring fixed part <NUM> and the leaf spring movable part <NUM> is increased. Then, the leaf spring movable part <NUM> hits the electric wire <NUM> diagonally so that the leaf spring movable part end <NUM> comes into contact with the side surface of the electric wire <NUM>.

At this time, the leaf spring movable part <NUM> is urged in a direction in which the opening angle between the leaf spring fixed part <NUM> and the leaf spring movable part <NUM> is further increased, and the leaf spring movable part end <NUM> strongly pushes the side surface of the electric wire <NUM>. The electric wire <NUM> is sandwiched and fixed between the vertical plate <NUM> and the leaf spring movable part end <NUM>.

Since the vertical plate <NUM> is provided with the small protrusion <NUM> at a position in contact with the side surface of the electric wire <NUM>, the electric wire <NUM> is less likely to slip. Further, even if an attempt is made to pull out the fixed electric wire <NUM>, the leaf spring movable part <NUM> is locked diagonally to the electric wire <NUM> and cannot be pulled out. In this way, the electric wire <NUM> is securely fixed between the vertical plate <NUM> and the leaf spring movable part <NUM>.

As shown in <FIG>, the display part <NUM> moves in the direction of the electric wire <NUM> (substantially to the right) in conjunction with the movement of the position of the pushed down block part <NUM>. That is, the entire movable member <NUM> having a substantially L-shape except for the urging part <NUM> rotates clockwise when viewed from the front side in a state of being suspended from the urging part <NUM>.

With the display part <NUM> moving, the visible state of the display part <NUM> through the window part <NUM> changes. In this embodiment, the display part <NUM> is not visible through the window part <NUM> in the initial state shown in <FIG>. In a state in which the electric wire <NUM> is fixed as shown in <FIG>, the display part <NUM> is configured to be visible from the outside through the window part <NUM>. Note that this relationship may be reversed.

<FIG> is a view comparing and showing the visible state of the display part <NUM> through the window part <NUM>. In <FIG>, a plan view <NUM> shows an initial state in which the display part <NUM> is not visible through the window part <NUM> (a plan view corresponding to the front view of <FIG>). Further, a plan view <NUM> shows a state in which the display part <NUM> is not visible through the window part <NUM> (a plan view corresponding to the front view of <FIG>). It is preferable that the part visible through the window part <NUM> of the display part <NUM> in a state in which the electric wire <NUM> is fixed is colored in a clear color.

<FIG> is a view for illustrating the work of removing the electric wire <NUM>. An operator inserts a rod-shaped tool <NUM> such as a flat-blade screwdriver through the tool opening <NUM>. As the tool <NUM> is inserted, it is guided by the wall surface of the tool opening <NUM> and diagonally hits the leaf spring movable part <NUM>.

When the operator pushes the tool <NUM> further against the urging force of the leaf spring <NUM>, the leaf spring movable part <NUM> rotates and moves (clockwise as viewed from the front side) so that the opening angle between the leaf spring fixed part <NUM> and the leaf spring movable part <NUM> is decreased. Then, the leaf spring movable part end <NUM> is hooked on the claw part <NUM> of the locking member <NUM>, and the leaf spring movable part <NUM> is locked.

The fixing of the electric wire <NUM> by the leaf spring movable part <NUM> is kept in a released state. The operator may easily pull out the electric wire <NUM>. When the electric wire <NUM> is pulled out, the movable member <NUM> is urged by the urging part <NUM>, and the block part <NUM> moves upward, and the display part <NUM> moves to a position invisible through the window part <NUM>. The position of the movable member <NUM> returns to the state shown in <FIG> (similar to <FIG> and <FIG>). In this way, the state of the terminal block <NUM> returns to the initial state shown in <FIG>.

According to the application example of this embodiment, the operator does not need to simultaneously insert the tool <NUM> and pull out the electric wire <NUM> when removing the electric wire <NUM>. This is because the terminal block <NUM> maintains the state in which the electric wire <NUM> is released from being fixed.

The operator inserts the tool <NUM> into the interior through the tool opening <NUM>, and when the feeling of pushing the leaf spring movable part <NUM> is obtained, the tool <NUM> may be pulled out, and then the electric wire <NUM> may be pulled out. At this time, since the leaf spring movable part <NUM> is released from being fixed, the electric wire <NUM> may be easily pulled out. Therefore, according to the terminal block <NUM> according to the application example of this embodiment, the operator may easily perform the work of removing the electric wire <NUM>.

In the conventional technology such as Patent Literature <NUM>, it is necessary to push the leaf spring movable part with the end of the electric wire at the time of inserting the electric wire during the connection work of the electric wire. The leaf spring of the terminal block has a strong urging force in order to firmly fix the electric wire. Therefore, in the conventional technology, it is necessary to push the electric wire with a considerable force against the leaf spring, and the connection work is not easy.

In particular, when the electric wire is a stranded wire obtained by twisting thin wires, if the thin wires are not tightly organized, they may be unwound when pushed in and the connection work may fail. However, according to the application example of this embodiment, it is not necessary to push the leaf spring movable part <NUM> with the electric wire end <NUM> when the electric wire <NUM> is inserted. Therefore, in the terminal block <NUM>, the connection work of the electric wire <NUM> may be easily and reliably performed.

In the conventional technology of Patent Literature <NUM>, since the electric wire connection state cannot be confirmed after the electric wire is connected, there is a problem that even if the electric wire is pulled and the electric wire is about to be removed during use or wiring, the state cannot be confirmed. However, in the terminal block <NUM>, when the electric wire <NUM> is connected, the operator may easily confirm by visually observing the window part <NUM> that the electric wire <NUM> is fixed. Therefore, according to the application example of this embodiment, it is possible to realize a terminal block capable of displaying the fixing of the electric wire, facilitating insertion of the electric wire, and facilitating the connection work.

In the conventional technology of Patent Literature <NUM>, when the electric wire is connected, the repulsive force due to the insertion of the electric wire cannot be obtained, so it is difficult for the operator to grasp the inserted state of the electric wire, and there is a problem that the lock is suddenly released and the wire is fixed by the leaf spring.

However, according to the application example of this embodiment, when the electric wire <NUM> is inserted, it is necessary for the operator to push down the block part <NUM> with the electric wire end <NUM> against the urging force applied by the urging part <NUM> of the movable member <NUM> before the locking of the leaf spring movable part <NUM> is released and the electric wire <NUM> is fixed. Therefore, the operator may obtain a feeling of repulsive force before the electric wire <NUM> is fixed, may grasp the state of insertion of the electric wire, and may easily grasp the feeling and sense of the connection work.

The urging force of the movable member <NUM> is not as strong as the urging force of the leaf spring for fixing the electric wire, but an appropriate urging force is given. Therefore, in the terminal block <NUM>, the connection work of the electric wire <NUM> may be easily and reliably performed.

In the terminal block according to the above aspect, it may include a configuration in which the housing is further provided with a tool opening on the first side surface, and when a rod-shaped tool is inserted through the tool opening, an end of the tool diagonally hits the movable part and moves the movable part against the urging force of the leaf spring, whereby fixing of the electric wire by the movable part is released, and the movable part is further locked by the claw part.

According to the above configuration, a push-in connection type terminal block may be realized which facilitates the work of removing the electric wire.

In the terminal block according to the above aspect, it may include a configuration in which when the electric wire whose fixing is released is pulled out, the urging force of the urging part causes the block part to move in a direction opposite to the insertion direction, and the visible state of the display part through the window part changes due to the change in the position of the display part moving in conjunction with the block part.

According to the above configuration, a push-in connection type terminal block may be realized in which the connection state of the electric wire may be visually recognized from the outside and easily confirmed.

In the terminal block according to the above aspect, the window part, the tool opening, and the insertion part may be disposed in this order side by side in a line on the first side surface of the housing. According to the above configuration, it is possible to realize a push-in connection type terminal block in which an operator may more easily visually recognize and confirm the connection state of the electric wire from the outside during the connection or removal work of the electric wire.

In the terminal block according to the above aspect, it may include a configuration in which the movable part is disposed diagonally with respect to the insertion direction. According to the above configuration, a push-in connection type terminal block may be realized in which the electric wire is locked against the pulling force when the electric wire is connected and is difficult to be pulled out.

Claim 1:
A terminal block (<NUM>) comprising:
a housing (<NUM>) provided with an accommodating part (<NUM>); and
a movable member (<NUM>), a leaf spring (<NUM>), and a locking member (<NUM>) disposed in the accommodating part,
wherein the housing is provided with a window part (<NUM>) and an insertion part (<NUM>) for inserting an electric wire (<NUM>),
wherein the leaf spring is provided with a fixed part (<NUM>) and a plate-shaped movable part (<NUM>) that is movable with respect to the housing,
wherein the locking member is provided with a claw part (<NUM>) for locking the movable part and a contact part (<NUM>) moving in conjunction with the claw part,
wherein the movable member is provided with a display part (<NUM>), a block part (<NUM>) moving in conjunction with the display part, and an urging part (<NUM>), wherein the urging part applies an urging force to the block part in a direction opposite to an insertion direction of the electric wire, and
wherein when the electric wire is inserted into the housing through the insertion part, an end (<NUM>) of the electric wire pushes the block part, and the contact part is further pushed via the block part, whereby locking by the claw part is released, and an end of the movable part is pressed against a side surface of the electric wire, and the electric wire is fixed, and
a visible state of the display part through the window part changes due to a change in a position of the display part moving in conjunction with the block part.