JPH05343111A - Terminal device - Google Patents

Abstract

PURPOSE:To visibly confirm the position and shape of an inserting hole by forming an, opening hole in the direction crossing an electric wire inserting hole of a case, and providing an opening hole opening/closing portion for closing the opening hole with an operating member held in a return position while for opening the opening hole with the operating member held in an operation position. CONSTITUTION:An operating member 40 is made of an insulating material such as a thermoplastic synthetic resin, and is operative with respect to an inner container 14 of a case 10. If an electric wire conductor 16 is not inserted, the member 40 is moved from a return position to an operation position and a chain piece 31 and a pushing-up piece 32 are pressed by a first and a second pressing portion 41, 42 so that a locking piece 43 is locked to a portion to be locked, whereby the member 40 is held in the operation position. Since an opening hole 15 cannot be closed by an opening hole opening/closing portion 44, an electric wire inserting hole 13 can be visibly confirmed from the upper portion of the case 10. When the conductor 16 is disconnected, the member 40 is moved from the operation position toward the return position so that the conductor 16 is drawn out by the reverse operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal device for connecting electric wires by using a locking spring suitable for wiring equipment, breakers, etc., that is, without using screws.

[0002]

2. Description of the Related Art As a conventional terminal device such as a breaker,
There are configurations shown in FIGS. 13 to 16.

In the figure, 10 is a case constituting the outside of the breaker, which is formed by an upper main body 11 and a lower main body 12, and has a circular cross section such that the boundary between the upper main body 11 and the lower main body 12 is almost in the middle. The electric wire insertion hole 13 is provided and the inner housing portion 14 communicating with the electric wire insertion hole 13 is provided.

Reference numeral 20 denotes a terminal member, which has a terminal plate 21 and a bottom plate 22 having a vertical support wall 23 facing each other, and is disposed in the inner housing portion 14. The electric wire conductor 16 inserted from the electric wire insertion hole 13 is fixed in contact with the terminal member 20. A locking portion 21a for locking a locked portion, which will be described later, is formed at the end of the terminal plate 21.

Reference numeral 30 denotes a locking spring, which is a locking spring for locking the electric wire conductor 16 inserted from the electric wire insertion hole 13 by bending an elastic conductive plate known in this type into a deformed S-shape. Piece 31
And a pressure piece 33 for pressing the wire conductor 16.

Reference numeral 40 denotes an operating member, which is movably formed between an operating position (see FIG. 13) for pressing the locking spring 30 and a return position (see FIG. 14) opened by the return spring 30. An operating part 46 for holding the lock spring 30 in the operating position, a pressing part 47 for pressing the locking spring 30, a locked part 48 locked by the locking part, and a suspension part 49 by which the return spring 50 is compressed and suspended. And are provided.

Next, the work of connecting the electric wires will be described. FIG.
When the conductor 16 is not inserted, the operation member 40
Are held in the operating position. In this state, the electric wire conductor 16 from which the coating of a predetermined length has been removed is inserted from the electric wire insertion hole 13. As a result, the electric wire conductor 16 is inserted while bending the tip of the locking piece 31, and the tip presses the locked portion 48 locked by the locking portion 21a so that the locked portion 48 is engaged. Stop 21
It is disengaged from a and returned to the return position by the elastic repulsive force of the return spring 50, indicating that the wire conductor 16 is securely connected.

[0008]

DISCLOSURE OF THE INVENTION The terminal device described above is
Since the electric wire insertion hole having a circular cross section is provided so that the boundary between the upper body and the lower body of the case is substantially in the middle, it is not possible to visually recognize from the upper surface of the case where the electric wire insertion hole is. Generally, in the method of connecting an electric wire to a breaker using this kind of terminal device, the electric wire is connected after the breaker is mounted on a distribution board or the like. For this reason, it was difficult to know where the wire insertion hole was.

On the other hand, this type of terminal device requires a measurement hole for measuring the insulation resistance between the ground and the electric wire.
However, in this case, since there is a wire insertion hole and a measurement hole,
An operator sometimes accidentally tried to connect a wire conductor through the measurement hole. Therefore, it is necessary for the worker to reconnect the electric wire to the electric wire insertion hole, which is a troublesome task.

The present invention has been made in view of the above circumstances, and a first object thereof is to provide a terminal device in which it is easy to know where the wire insertion hole is, and a second object. However, it is to provide a terminal device in which the wire insertion hole can be easily identified.

[0011]

According to a first aspect of the present invention, there is provided a terminal device including a case having an electric wire insertion hole and an inner housing portion communicating with the electric wire insertion hole, and an electric wire insertion hole disposed in the inner housing portion. A terminal member for contact-fixing the electric wire conductor inserted through the hole,
Locking spring provided with a locking piece for locking the electric wire conductor inserted through the electric wire insertion hole, a contact pressure piece connected to the locking piece for pressing the electric wire conductor, and a push-up piece for exerting a pressing force in a predetermined direction. And an operating position that is disposed in the inner housing portion so as to be operable from the outside and has first and second pressing portions that press the locking piece and the lifting piece, and presses the lifting piece and the locking piece. In a terminal device provided with an operation member movable between return positions opened by a push-up piece, an opening hole is provided in a direction intersecting the wire insertion hole of the case, and the operation member is held at the return position. The operation member is provided with an opening opening / closing portion so that the opening hole is closed in the state and the opening hole is not closed in the operation position.

According to another aspect of the present invention, the terminal device has a case having an electric wire insertion hole and an inner housing portion communicating with the electric wire insertion hole, and an electric wire which is arranged in the inner housing portion and is inserted through the electric wire insertion hole. A terminal member that fixes the conductor in contact, a locking piece that locks the electric wire conductor inserted from the electric wire insertion hole, a contact pressure piece that is connected to the locking piece and presses the electric wire conductor, and a pressing force acts in a predetermined direction. A lock spring having a push-up piece, and a first and second pressing portion that is disposed in the inner housing portion so as to be operable from the outside and that presses the lock piece and the push-up piece. In a terminal device provided with an operating member that is movable between a working position that presses the lock piece and a return position that is opened by the push-up piece, at least one of the case when the operating member is held in the working position. Hidden when the part is held in the hidden return position Oddly, there a structure in which a through hole from the surface in contact with an external operating member to the operation member toward the terminal member.

According to another aspect of the terminal device of the present invention, the wire insertion hole and the case provided with the inner housing portion communicating with the wire insertion hole are disposed in the inner housing portion and are inserted through the wire insertion hole. A terminal member for contact-fixing the electric wire conductor, a locking piece for locking the electric wire conductor inserted through the electric wire insertion hole, a contact pressure piece for pressing the electric wire conductor which is connected to the locking piece, and a pressing force in a predetermined direction. A lock spring having a working push-up piece, and a push-up piece having first and second pressing portions that are disposed in the inner housing portion so as to be operable from the outside and press the lock piece and the push-up piece. It is movable between an operating position that presses the lock piece and a return position that is opened by the push-up piece, and at least a part of it is hidden by the case when held in the operating position and is held in the return position. To prevent it from being hidden when the An operation member having a through hole toward the front side of the case, the opening hole is closed in a direction crossing the wire insertion hole of the case, and the opening hole is closed when the operation member is held at the return position. The operating member is provided with an opening hole opening / closing portion so as not to block the opening hole when the operating member is held at the operating position, and at least a part of the case is hidden at the return position when the operating member is held at the operating position. The through hole is provided in the operation member from the surface contacting the outside of the operation member toward the terminal member so as not to be hidden in the opened state.

[0014]

According to the structure of the first aspect, the opening hole is provided in a direction intersecting with the wire insertion hole of the case, and the opening hole is closed and held at the operating position when the operating member is held at the return position. Since the opening hole opening / closing portion is provided in the operation member so as not to block the opening hole in the open state, it is possible to visually recognize where the wire insertion hole is from the direction intersecting with the wire insertion hole.

According to the second aspect of the present invention, when the operating member is held in the operating position, at least a part of the operating member is hidden so as not to be hidden when the operating member is held in the return position. Since the through hole was provided in the operation member from the surface that contacts with the terminal member, the complete shape of the wire insertion hole can be visually confirmed before inserting the wire, and the measurement hole for measuring the insulation resistance after inserting the wire. Only visible.

According to the third aspect of the present invention, the opening hole is closed in the direction intersecting with the wire insertion hole of the case, and the opening hole is closed when the operating member is held at the return position. The operating member is provided with an opening opening / closing portion so as not to block the opening hole, and at least a part of the operating member is hidden in the case when the operating member is held in the operating position, and the operating member is not hidden when in the returning position. Thus, since the through hole is provided in the operation member from the surface contacting the outside of the operation member toward the terminal member, it is possible to visually recognize where the wire insertion hole is from the direction intersecting the wire insertion hole,
Before inserting the electric wire, only the electric wire inserting hole can be visually recognized in its complete shape, and after inserting the electric wire, only the measuring hole for measuring the insulation resistance can be visually recognized.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. The members having the same basic functions as those of the conventional example are designated by the same reference numerals.

That is, the case 10 is made of an insulating material such as plastic and is formed in a box shape by superposing the upper body 11 and the lower body 12 on each other, and has a wire insertion hole 13 and an inner housing portion 14 communicating with the wire insertion hole 13. Have. The upper body 11 is provided with an opening hole 15 in a direction intersecting with the wire insertion hole 13. Wire insertion hole 13
Is formed so that a boundary between an operation member described later and the upper body 11 is substantially present, and the electric wire conductor 16 is inserted through this hole. A terminal member and an operating member, which will be described later, are housed in the inner housing portion 14.

The terminal member 20 has an opposing terminal plate 21 and a bottom plate 22 provided with a vertical support wall 23 and is disposed in the inner housing portion 14. An electric wire conductor stopper 24 is formed on the inner side so that the electric wire conductor 16 is completely inserted.

The locking spring 30 is formed by bending an elastic conductive plate into a deformed S-shape so that the electric wire conductor 16 is provided on the electric wire insertion hole 13 side.
A lock piece 31 for locking the lock and a push-up piece 32 for moving an operation member described later from an operating position (see FIG. 1) to a return position (see FIG. 2) are provided, and an electric wire is inwardly directed through the flat surface portion 34. A pressure contact piece 33 for pressing the conductor 16 is continuously provided. The pressure contact piece 33 has a locked portion 33a for holding an operation member described later in an operating position.

The operating member 40 is made of an insulating material such as thermoplastic synthetic resin, and is arranged in the inner housing portion 14 of the case 10 so as to be operable from the outside and presses the locking piece 31 and the pushing piece 32. The wire insertion hole is arranged so as to be movable between the operating position and the return position opened by the push-up piece 32.
In the vicinity of 13, there are first and second pressing portions 41, 42 for pressing the locking piece 31 and the pushing up piece 32 while being held at the operating position, and the locked portion 33a of the pressure contact piece 33 is provided. An engaging portion 43 for engaging with is provided. Further, above the wire insertion hole 13, the opening hole opening / closing portion 44 is formed so as to close the opening hole 15 in the state of being held in the return position and not close the opening hole 15 in the state of being held in the operating position.
Is provided.

Next, the work of connecting the electric wires will be described. FIG. 1 shows a state in which the wire conductor 16 is not inserted, and the operation member 40
Is moved from the return position to the operating position, the first and second pressing portions 41, 42 press the locking piece 31 and the pushing-up piece 32 to engage the locking portion 43 with the locked portion 33a. By stopping
The operating member 40 is held in the operating position. In this case, since the opening hole opening / closing portion 44 does not close the opening hole 15, the wire insertion hole 13 can be visually recognized from the upper surface of the case 10. In this state, the wire conductor 16 (outer diameter 1.6 mm) is inserted from the wire insertion hole 13 and the tip of the wire conductor 16 pushes down the pressure contact piece 33, so that the locking portion 43 of the operating member 40 is locked. Get out of.
Then, the operation member 40 is moved to the return position by the elastic repulsive force of the push-up piece 32. In this state, the electric wire conductor 16 is not always completely fixed in contact, so that the electric wire conductor 16 is inserted until the tip of the electric wire conductor 16 comes into contact with the electric wire stopper 24 of the terminal member 40 as shown in FIG. At this time the first
Since the pressing portion 41 of does not come into contact with the locking piece 31, the tip of the locking piece 31 prevents the electric wire conductor 16 from coming off, and the pressure contact piece 33 fixes the electric wire conductor 16 and the terminal plate 31 in contact with each other. There is. In this case, since the opening hole opening / closing part 44 closes the opening hole 15,
The electric wire insertion hole 13 cannot be visually recognized from the upper surface of the case 10.

When the connection of the electric wire conductor 16 is unlocked, the operating member 40 is moved from the return position to the operating position, and the locking piece 31 is moved to the outer diameter of the electric wire conductor 16 by the first pressing portion 41. The electric wire conductor 16 can be easily removed by pressing the wire conductor 16 in this state, and the electric wire conductor 16 can be pulled out in this state.

Next, a second embodiment will be described with reference to FIGS. In this embodiment, the terminal member 20 and the locking spring 30 are the same as those in the first embodiment, and other members will be described.

That is, the case 10 is made of an insulating material such as plastic and is formed into a box-like shape by stacking the upper body 11 and the lower body 12 on each other. The wire insertion hole 13 and the inner housing portion 14 communicating with the wire insertion hole 13 are formed. Have. On the upper surface of the upper body 11, an opening hole 17 for visually recognizing a through hole of an operation member described later is provided. The wire insertion hole 13 is formed so that the boundary between the upper body 11 and the lower body 12 is almost a boundary, and the wire conductor 16 is formed from this hole.
Is inserted. Further, the inner housing portion 14 houses an operation member and a terminal member described later.

The operating member 40 is made of an insulating material such as a thermoplastic synthetic resin and has a fan-like shape in a side view. The operating member 40 is arranged in the inner housing portion 14 of the case 10 so as to be operable from the outside, and presses the push-up piece 32. It is arranged so as to be movable between a position (see FIG. 5) and an open return position (see FIG. 6).
The operation member 40 includes first and second pressing portions 41, 42 for pressing the locking piece 31 and the pushing-up piece 32 when in the operating position,
Measuring hole 45 (through hole) having a locking portion 43 for locking the locked portion 33a of the pressure contact piece 33 and an unlocking portion 45a for unlocking the wire conductor 16 and for measuring insulation resistance. And are provided.

Next, the work of connecting the electric wires will be described. FIG. 5 shows a state in which the wire conductor 16 is not inserted, and the operation member 40
The unlocking part 45a of the first rotating part 45a is rotated from the returning position to the operating position by a jig such as a screwdriver, and the first and second pressing parts 41, 42
However, by pushing the locking piece 31 and the push-up piece 32 to lock the locking portion 43 to the locked portion 33a, the operating member 40 is held at the operating position. At this time, part of the measurement hole 45 is hidden by the case 10. In this state, the wire conductor 16 (outer diameter 1.6 mm) is inserted from the wire insertion hole 13 and the tip of the wire conductor 16 pushes down the pressure contact piece 33, so that the locking portion of the operating member 40 is stopped.
43 disengages from the locked portion 33a. Then, the operating member 40 is moved to the return position by the elastic repulsive force of the push-up piece 32.
In this state, the wire conductor 15 is not always completely fixed in contact, so that the wire conductor 16 is inserted until it comes into contact with the wire stopper 24 of the terminal member 40 as shown in FIG. In this case, since the first pressing portion 41 does not come into contact with the locking piece 31, the tip of the locking piece 31 prevents the electric wire conductor 16 from coming off, and the pressure contact piece 33 prevents the electric wire conductor 16 from coming off.
The terminal plate 31 is fixed by contact. At this time, the measurement hole 45
Can not be blocked by Case 10.

When the connection of the wire conductor 16 is unlocked, the unlocking portion 45a is moved from the return position to the operating position by a jig such as a screwdriver, and the first pressing portion 41 is used to lock the locking piece 31a.
The wire conductor 16 can be easily pulled out by pressing the wire conductor 16 to the outer diameter of the wire conductor 16 or more, and the wire conductor 16 can be pulled out in this state.

According to the second embodiment, a part of the measuring hole 45 is hidden when the operating member 40 is held at the operating position, and the measuring hole 45 is not hidden when being held at the return position. By visually observing the measurement hole 45, the person can insert the electric wire conductor 16 into the electric wire insertion hole 13 without making a mistake.

Next, a third embodiment will be described with reference to FIGS. This is the operation member of the first embodiment provided with a measurement hole (through hole), and the other structure is the same as that of the first embodiment.

That is, the case 10 to the lock spring 30 are substantially the same as those in the first embodiment. The operation member 40 is formed of an insulating material such as thermoplastic synthetic resin, and is an inner housing portion of the case 10.
It is placed on 14 so that it can be operated from the outside, and it has a lock piece 31 and a push-up piece.
It is arranged so as to be movable between an operating position for pressing and 32 and a return position opened by the push-up piece 32. In the vicinity of the electric wire insertion hole 13, there are provided first and second pressing portions 41 and 42 for pressing the locking piece 31 and the pushing up piece 32 while being held in the operating position, and the pressure contact piece 33 is engaged with the engagement piece 33. Stop 33a
An engaging portion 43 for engaging with is provided. In addition, the wire insertion hole 13
An opening opening / closing portion 44 is provided above the opening hole opening / closing portion 44 so as to close the opening hole 15 in the state of being held in the return position and not close the opening hole 15 in the state of being held in the operating position. Further, a measurement hole 45 (through hole) for measuring insulation resistance is provided on the upper surface.

Next, the work of connecting the electric wires will be described. FIG. 9 shows a state in which the electric wire conductor 16 is not inserted, and the operation member 40 is moved from the return position toward the operation position, and the first and second
The pressing portions 41, 42 hold the operating member 40 in the operating position by pressing the locking piece 31 and the pushing-up piece 32 to lock the locking portion 43 to the locked portion 33a. In this case, the opening hole
Since the wire 15 is not closed, the wire insertion hole 13 can be visually recognized from the upper surface of the case 10, and the complete shape of only the wire insertion hole 13 can be visually recognized before the wire conductor 16 is inserted. In this state, the wire conductor 16 (outer diameter 1.6 mm) is inserted from the wire insertion hole 13 and the tip of the wire conductor 16 pushes down the pressure contact piece 33, so that the locking portion 43 of the operating member 40 is locked. Get out of. Then, the operating member 40 is moved to the return position by the elastic repulsive force of the push-up piece 32. In this state, the wire conductor 15
Is not always in contact with and fixed to the terminal member 40, as shown in FIG.
Insert until it contacts the electric wire stopper 24 of. In this case, since the first pressing portion 41 does not come into contact with the locking piece 31, the tip of the locking piece 31 prevents the electric wire conductor 16 from coming off, and the contact pressure piece 33 causes the electric wire conductor 16 and the terminal plate 31 to come into contact with each other. Are fixed by contact. At this time, since the opening hole opening / closing portion 44 closes the opening hole 15, the electric wire insertion hole 13 is closed from the upper surface of the case 10 and the measurement hole 45 can be visually recognized in a complete shape.

According to the first to third embodiments,
The operating member is held in the operating position by being locked by the locking spring, but it may be locked by the terminal member and locked in the operating position. Further, in the first and third embodiments, the operation member is of a movable type, and in the second embodiment, of a rotary type, but it can be applied regardless of the shape of the operation member.

[0034]

According to the configuration of the first aspect, it is possible to visually recognize where the wire insertion hole is located from a direction intersecting with the wire insertion hole, so that it is easy to understand where the wire insertion hole is located. Play.

According to the structure of the second aspect, only the complete shape of the wire insertion hole is visible before inserting the electric wire, and only the measuring hole for measuring the insulation resistance is visible after inserting the electric wire. The effect is that it is easy to understand which is.

According to the third aspect of the present invention, it is possible to visually recognize where the electric wire insertion hole is located from a direction intersecting with the electric wire insertion hole, and only the electric wire insertion hole has a complete shape before the electric wire is inserted. Since only the measurement hole for measuring the insulation resistance can be visually recognized after inserting the electric wire, it is easy to know where the electric wire insertion hole is and at the same time it is easy to understand which electric wire insertion hole.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is a vertical sectional view showing a state in which an electric wire conductor is connected to the one shown in FIG.

FIG. 3 is an exploded perspective view of FIG.

4 is a top view showing a breaker incorporating the one shown in FIG. 1. FIG.

FIG. 5 is a longitudinal sectional view showing a second embodiment of the present invention.

6 is a vertical cross-sectional view showing a state in which an electric wire conductor is connected to the one shown in FIG.

FIG. 7 is an exploded perspective view of FIG.

FIG. 8 is a top view showing a breaker incorporating the one shown in FIG.

FIG. 9 is a vertical cross-sectional view showing a third embodiment of the present invention.

10 is a vertical cross-sectional view showing a state in which an electric wire conductor is connected to the one shown in FIG.

FIG. 11 is an exploded perspective view of FIG. 9.

FIG. 12 is a top view showing a breaker incorporating the one shown in FIG. 9;

FIG. 13 is a vertical sectional view showing a conventional example.

14 is a vertical cross-sectional view showing a state in which an electric wire conductor is connected to the one shown in FIG.

FIG. 15 is an exploded perspective view of FIG.

FIG. 16 is a top view showing a breaker incorporating the one shown in FIG.

[Explanation of symbols]

 10 Case 13 Wire insertion hole 14 Inner housing part 15 Opening hole 16 Wire conductor 20 Terminal member 30 Locking spring 31 Locking piece 32 Pushing up piece 33 Contact piece 40 Operating member 41 First pressing part 42 Second pressing part 43 Lock

Claims (3)

[Claims] 1. A case having an electric wire insertion hole and an inner housing portion communicating with the electric wire insertion hole, and a terminal member arranged in the inner housing portion for contact-fixing the electric wire conductor inserted through the electric wire insertion hole. A chain having a locking piece for locking the electric wire conductor inserted through the electric wire insertion hole, a contact pressure piece connected to the locking piece for pressing the electric wire conductor, and a push-up piece for exerting a pressing force in a predetermined direction. An operation for arranging a lock spring and a first and a second pressing portion that are disposed in the inner housing portion so as to be operable from the outside and that press the locking piece and the pushing piece, and press the pushing piece and the locking piece. A terminal device having a position and a movable member that is movable between a return position opened by a push-up piece, and an opening hole is provided in a direction intersecting with the wire insertion hole of the case, and the operation member is held at the return position. Is closed, the opening hole is closed and held in the operating position. Terminal apparatus, characterized in that an opening hole closing part in the operating member so as not to block the opening hole when the state. 2. A case having an electric wire insertion hole and an inner housing portion communicating with the electric wire insertion hole, and a terminal member arranged in the inner housing portion for contact-fixing the electric wire conductor inserted from the electric wire insertion hole. A chain having a locking piece for locking the electric wire conductor inserted from the electric wire insertion hole, a contact pressure piece connected to the locking piece for pressing the electric wire conductor, and a push-up piece for applying a pressing force in a predetermined direction. An operation for arranging a lock spring and a first and a second pressing portion that are disposed in the inner housing portion so as to be operable from the outside and that press the locking piece and the pushing piece, and press the pushing piece and the locking piece. A terminal device provided with an operating member movable between a position and a return position opened by a push-up piece, wherein at least a part of the operating member is hidden in the case and held in the return position when the operating member is held in the operating position. The operating member so that it does not hide when Terminal apparatus characterized by providing a through hole in the operating member toward the terminal member from the surface in contact with. 3. A case having an electric wire insertion hole and an inner housing portion communicating with the electric wire insertion hole, and a terminal arranged in the inner housing portion for contact-fixing the electric wire conductor inserted from the electric wire insertion hole. A member, a locking piece for locking the electric wire conductor inserted from the electric wire insertion hole, a contact pressure piece connected to the locking piece for pressing the electric wire conductor, and a lifting piece for exerting a pressing force in a predetermined direction. A locking spring and first and second pressing portions that are disposed in the inner housing portion so as to be operable from the outside and that press the locking piece and the pushing piece press the pushing piece and the locking piece. It is movable between the operating position and the return position opened by the push-up piece, so that at least a part of it is hidden in the case when it is held in the operating position, and it is not hidden when it is held in the return position. A through hole is provided from the surface that contacts the outside to the terminal member. In a terminal device provided with an operating member, an opening hole is formed in a direction intersecting with the wire insertion hole of the case, and the opening hole is closed when the operating member is held at the return position and is held at the operating position. At this time, the operation member is provided with an opening opening / closing portion so as not to block the opening hole, and at least a part of the operation member is hidden in the case when the operation member is held in the operating position so as not to be hidden when in the return position. In the terminal device, a through hole is provided in the operation member from the surface of the operation member that contacts the outside to the terminal member.