JP3200988B2 - Long key support structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for connecting a pair of link members.
The present invention relates to a support structure that guides and supports the vertical movement of a long key such as a space key via guide support members arranged in a movable state with respect to each other.
Lower part formed on each of a plurality of key holding parts of the damper member
In order to lock rotatably with the rotation locking part,
Position of the lower end of the locking member
A long key support that can reliably prevent
It is related to the holding structure.

[0002]

2. Description of the Related Art Various support structures have been proposed for supporting long keys such as a space key.
For example, Japanese Utility Model Laid-Open No. 48-103867 and Japanese Utility Model Laid-Open No.
The support structure described in 21066 is generally known.

In each of the support structures described in the above publications, a substantially U-shaped wire member is connected between a locking portion formed on the back surface of a long key and a locking portion on a frame. , A switch portion is provided substantially below the central portion of the long key.

In such a long key support structure, when the long key is depressed, the long key is depressed through the action of a wire member connected between the locking portion of the long key and the locking portion of the frame. Regardless of the position, the key can be moved downward while maintaining the horizontal state. Thus, even if any part of the long key is pressed, the long key is prevented from moving while being tilted.

[0005] However, the conventional long key support structure requires a wire member as a separate member, and as a result, there is a problem that the number of parts increases and the cost increases. Also, the work of connecting the wire member between the locking portion of the long key and the locking portion of the frame is quite complicated, and therefore, it takes time to assemble the support structure of the long key. This also leads to an increase in cost.

[0006] In order to solve such a problem, it is necessary to use
Long keys can be prevented from tilting without using ear members
It is only necessary to use a simple guide support member.
Support members have been proposed. For example, a pair of link members
Up and down movement of a long key using a guide support member consisting of
Are known, and in such a configuration, each
Locking part provided on the back of long key with the upper end of link member
And a lower end provided on the holder member.
It is locked to. According to this long key support structure,
A pair constituting the inner support member for cooperation of each link member
Based on the length of the long key,
It is possible to guide the movement.

[0007]

By the way, the above-mentioned subordinate
In the conventional long key support structure, the link
Lock the end and the locking part on the back of the long key top,
Lock the lower end of each link member with the locking portion of the holder member
, There are various locking modes. These locking states
In some cases, for example, one of a pair of link members
The lower end of the locking member can slide with respect to the locking part of the holder member.
Lock the lower end of the other link member with the locking portion of the holder member.
There is a mode in which it is rotatably locked with respect to. The lock
In the aspect, the holder member has a length corresponding to the length of the long key.
And a pair of sliding locking portions and rotating locking portions.
Is formed, and the lower end of one link member is
It is slidably locked by the dynamic locking part, and the other link part
It is necessary to lock the lower end of the material rotatably at each rotation locking part.
General. Here, the lower end of one link member
When slidably locked to each sliding locking part of the holder member,
The sliding engagement part has a sliding groove formed to a certain length
It is composed of a sliding lock that supports the vertical key
The lower end of the link member slides in the sliding groove within the range where there is no obstacle
If it can be performed, the sliding groove of each separated sliding locking part
Some deviation between them can be tolerated. But
The lower end of the other link member is
When rotatably locked to the dynamic locking part, the rotation locking part
Often, only the pivot hole is formed, at this time,
The rotation centers of the rotation holes in each rotation locking portion match each other.
If not, the lower end of the other link member is
Rotation is to be performed in a state where there is misalignment between
The link member is distorted when the long key moves up and down.
I will. In this way, the other link member is distorted
If this happens, the lower end can be rotated smoothly.
It is not possible to slide the lower end of one link member
This will cause trouble, and as a whole the guide support member
Can not properly guide the long key
You. As a result, the operation of the long key is extremely deteriorated Teshima
Is Umono.

[0008] The present invention has been made to solve the problems of the prior art, 2 constituting the guide support member
The lower end of one of the two link members
The lower part formed on each of the plurality of key holding parts of the
About the rotatable locking to the
Between the lower end of the link member and the rotation center of the lower rotation
It is possible to reliably prevent misalignment from occurring.
Yes, guide function of long key by guide support member is good
As a result, the operability of the long key can be remarkably improved.
An object of the present invention is to provide a support structure for a long key.

[0009]

Means for Solving the Problems] The support structure of a long key according to claim 1 for achieving the above object, the upper times from the back
An elongated key top kinematic locking portion and the upper sliding the locking portion is provided vertically, while being disposed below the elongated key top, juxtaposed with elongated key top in the region Multiple
Holder member having a key holding portion, and each of the key holding portions
At a diagonal position with respect to the upper rotation locking portion in a side view.
A lower sliding engagement portion formed, and the upper sliding portion in a side view.
A lower rotation locking portion formed on the diagonal position side with the dynamic locking portion,
The upper end is locked by the upper rotation locking portion and the lower end is
A first link member locked to the lower sliding locking portion;
The end is locked by the upper sliding locking portion and the lower end is
The second link member locked by the lower rotation locking portion
To be arranged on the movable state, comprises a guide support member for guiding the vertical movement of the elongated key top, and a switching unit for performing a switching operation in accordance with the vertical movement of the elongated key tops, each Lower pivot locking part in key holding part
The center of rotation of each is in a straight line across multiple key holders
Characterized by being arranged in

[0010]

In the support structure of claim 1 having an [action] The configuration, when the user presses the long key, the long key, on which
The first link member is locked between the lower sliding engagement portion parts pivoting engaging section and the holder member, and the lower pivot lock the upper slide engaging portion and the holder member elongated key It is guided downward by a guide support member comprising a second link member locked between the first and second portions.

[0011] At this time, in the area of the long key top,
The lower part of each of the plurality of key holders
Each rotation center of the part rotation locking part is transferred to a plurality of key holding parts.
Are arranged on a straight line.
The lower end of the second link member locked to the
Position deviation from the center of rotation of the part
This can be prevented. Therefore, the second link member
The operation is performed by the lower end of the first link member and the lower sliding engagement portion.
There is no problem with sliding operation with
To improve the guide function of the long key by the guide support member.
Thus, the operability of the long key can be remarkably improved.

Further, when the long key is depressed, the guide support member is also moved downward with the depression, and the switching member is pressed via the guide support member. As a result, the switching member is buckled after a predetermined pressing force is applied to perform the switching operation.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view of a key switch device having a support structure for a long key according to the present embodiment, and shows a long key top 1 such as a space key.
Is molded from a synthetic resin such as an ABS resin, and letters such as alphabets are formed on the upper surface thereof by printing or the like. Also, from the back surface of the key top 1, two locking portions 2, 3 (each locking portion 2, 3 has a pair in the direction perpendicular to the paper surface, and FIG. 1 shows only one of each pair). ) Is provided integrally with the key top 1 body downward.

[0014] engaging portion (upper pivot locking portion) 2, one of the link members of the two link members 7 and 8 to be described later
(1st link member) The locking groove 4 which locks the locking bar 13 formed in one end of 7 so that rotation is possible is formed,
Locking part (upper sliding locking part) 3 has the other link member
(Second link member) Locking pin 2 formed at one end of 8
A locking groove 5 is formed to lock the first and third slidably in the horizontal direction. Further, the locking groove 4 is formed with a locking guide portion 4A which is continuous with the locking groove 4 and is opened so as to gradually expand downward. The locking guide portion 4A is a link. The locking rod 13 of the member 7 is
It is guided toward the locking groove 4 when snapping into the inside. Further, a locking guide portion 5A having a slope extending downward is provided at a lower position of the locking groove 5 of the locking portion 3, and the locking guide portion 5A is provided with a phosphorus.
When the locking pins 23 and 24 of the locking member 8 are snapped into the locking groove 5, they are guided toward the locking groove 5.

A guide support member 6 for guiding and supporting the vertical movement of the key top 1 is provided below the key top 1, and the guide support member 6 includes two link members 7, 8.

One of the link members 7 is formed in a U-shape in plan view as shown in FIG. 2, and has a pair of plate members 9 with a length of the key top 1 between one ends of the plate members 9. A long locking bar 13 corresponding to the above is integrally formed, and locking pins 15 and 16 are formed at the other end of each plate-like body 9. The locking bar 13 is snapped into the locking groove 4 of the locking portion 2 via the locking guide portion 4A, and the locking pins 15 and 16 are provided on a holder plate 25 to be described later. It is locked by the stop 26. Also,
The locking rod 13 has a large rigidity due to its rod-like structure. Accordingly, the strength of the link member 7 is increased by the presence of the locking rod 13, and the handling thereof becomes easy.

Further, a pair of shafts 12 are provided at positions facing each other from the central position on the side of each plate 9 facing each other. Each of these shaft bodies 12 is supported by a shaft hole 20 formed in the other link member 8 described later. In addition, the locking bar 13 of the link member 7 and each locking pin 15,
Reference numeral 16 is configured so that the distance from each shaft body 12 is equal.

Further, as shown in FIG. 3, the other link member 8 has a pair of plate-like members 17, and between one end of each plate-like member 17 is a locking rod 13 provided on the link member 7. the same as,
A long connecting rod 21 corresponding to the length of the key top 1 is integrally formed, and locking pins 23 and 24 are formed at the other end of each plate-like body 17.

The connecting rod 21 functions as a wire member in the conventional supporting structure.
Both ends 21A of the connecting rod 21 are holder plates 2 to be described later.
5 and each locking pin 23, 2
4 is snapped into the locking groove 5 of the locking portion 3 via the locking guide portion 5A. As described above, since the connecting rod 21 corresponding to the wire member is integrally formed in the link member 8, the support structure according to the present embodiment does not require a separate wire member.

Further, shaft holes 20 are respectively formed at central positions facing each other on the outside of each plate member 17, and each plate hole of the link member 7 is formed in each shaft hole 20. Each shaft body 12 formed at 9 is rotatably fitted. As a result, the link members 7 and 8 are rotatable crossing each other via the shafts 12 and the shaft holes 20, and the shaft supports A are formed by the shafts 12 and the shaft holes 20. Is done. In addition, the connecting rod 21 of the link member 8 and each locking pin 2
3 and 24 are configured so that the distances from the shaft hole 20 are equal.

Further, between the central positions inside the plate-like members 17, a rubber spring 31 described later is mounted on the upper surface, and when the key top 1 is pressed, each link member 7, The push rod 18 for pushing down the rubber spring 31 in accordance with the mutual rotation of the push rods 8 is provided integrally. Thus, when the key top 1 is pressed, the pressing bar 18 presses the rubber spring 31 to perform a switching operation.

Next, a resin holder plate 25 is arranged below the guide support member 6. As shown in FIG. 6, the holder plate 25 is provided with a plurality of square switch parts (key holding parts) S, and a switch device (not shown ) is provided in each of the switch parts S. You. Each switch section S has a locking section (lower sliding locking section) 26 and a locking section (lower rotation locking section ) corresponding thereto.
Part) 27 (the locking portion 26, 27 as shown in FIG. 6, each two respectively every switch unit S is provided, indicating the respective one of the locking portions 26 and 27 in FIG. 1) Are formed. Here, the length of the key top 1 is an integral multiple of the length of the switch unit S (for example, the length of the key top 1 is two switch units S as shown in FIG. 5).
1 and S2).

As described above, the key top 1 has a length that is an integral multiple of the length of the switch section S in FIG.
Since the lengths of the locking rods 13 and the connecting rods 21 of the link members 7 and 8 also have integer multiples of the length of the switch section S, the length of the key top 1 is an integer multiple of the switch section S. As long as it can be arranged at a desired position on the holder plate 25.

The engaging portion 26 is formed with a sliding groove 28 whose right side in FIG. 1 is an open side. The sliding groove 28 of the engaging portion 26 is provided with an engaging groove formed on the link member 7. Stop pin 1
5 and 16 are inserted. The locking portion 27 has a locking portion 2.
6, a sliding groove 29 having the right side in FIG. 1 as an open side is formed, and a locking projection 29A having an inclined surface in the sliding groove 29 on the right side in FIG. Are formed. In the sliding groove 29 of the locking portion 27, the phosphorus
Both ends 21 </ b> A of the connecting rod 21 formed on the locking member 8 are inserted. At this time, the sliding groove 29
The connecting rod 21 can be rotated by the left inner wall and the locking projection 29A.
A rotation hole is formed to hold the
The rotation center of the rotation hole formed by each switch section S is
As shown in FIG. 5, a straight line extends over each switch section S.
Are located.

The locking pins 15 and 16 and the connecting rod 2
1 is inserted into each of the sliding grooves 28 and 29,
5 and 16 and the connecting rod 21 are slid on the holder plate 25 from the open sides of the sliding groove 28 and the sliding groove 29, respectively.
Are inserted into the respective sliding grooves 28, 29. After the connecting rod 21 has passed over the locking projection 29A in the sliding groove 29 at the time of the insertion, the connecting rod 21 does not come off from the sliding groove 29.
Numeral 1 is rotatably held in the slide groove 29 in cooperation with the locking projection 29A, and the locking pins 15 and 16 are slidably held in 28. At this time, sliding groove 2
9 formed by the left inner wall and the locking projection 29A
The center of rotation of the hole is arranged in a straight line over each switch section S.
Position between the locking rod 21 and the rotation hole.
No misalignment occurs.

The holder plate 2 configured as described above
As shown in FIG. 4, a flexible circuit board 30 on which a switch electrode 30A is formed corresponding to each key switch is arranged below 5, and an inverted cup shape corresponding to the switch electrode 30A. Rubber spring 31
Are mounted on the flexible circuit board 30 (disposed on the switch section S1). Further, the circuit board 3
A movable electrode 31A is fixed to the inner top wall of the rubber spring 31 so as to face the switch electrode 30A on the zero.
The push rod 18 formed on the link member 8 is disposed on the upper surface of the rubber spring 31.

As a result, when the push rod 18 moves downward with the depression of the key top 1, the rubber spring 31 is pushed by the push rod 18, and when a certain amount of pushing is exceeded, the rubber spring 31 is buckled and is movable. The switching operation is performed by the contact between the electrode 31A and the switch electrode 30A on the flexible circuit board 30.

A switch support plate 32 is provided below the flexible circuit board 30, and the switch support plate 32 is provided above each of the circuit boards 30,
This supports the holder plate 25.

In the above configuration, the locking portion 2 and the holder plate 25 formed on the back surface of the key top 1 located on the left side in FIG. 1 with respect to the perpendicular L passing through the center of the shaft support portion A.
A locking groove 27 for locking the locking rod 13 rotatably and a connecting rod 21 for locking the projection 2
A sliding groove 29 that is rotatably locked in cooperation with 9A is provided. Locking pins 3 and 24 and a locking portion 26 formed on a holder plate 25 are formed on a back surface of the key top 1 and a locking plate 26 on the right side of the perpendicular L in FIG. The locking groove 5 and the sliding groove 28 for locking the locking pins 15 and 16 slidably in the horizontal direction are provided.

In order to assemble the support structure of the key top 1 configured as described above, first, the flexible circuit board 30 and the holder plate 25 are placed on the switch support plate 32 and the respective shafts of the link member 7 are mounted. The guide support member 6 is assembled by fitting 12 into each shaft hole 20 of the link member 8.

[0031] Then, the horizontal state of each link members 7 and 8 each other is rotated, the locking pin of the link member 7 15,1
6, and the connecting rod 21 of the link member 8 is
The slide grooves 27 are slid on the holder plate 25 from the open sides of the slide grooves 28 and 29 into the respective slide grooves 28 and 29. Then, when further sliding, the link member 8
The connecting rod 21 is provided with a locking projection 29 formed in the sliding groove 29.
Get over A from the slope side. Thus, the connection between the guide support member 6 and the holder plate 25 is completed.

As described above, the connection between the connecting rod 21 of the link member 8 and the sliding groove 29 and the locking pin 1 of the link member 7
The connection between the guide supports 5 and 16 and the slide grooves 28 is made only by sliding the guide support members 6 on the holder plate 25 from the open sides of the respective slide grooves 28 and 29. 25 can be very easily connected.

Next, the locking rod 13 of the link member 7 and the locking groove 4 of the key top 1 are made to face each other, and the locking pins 23 and 24 of the link member 8 and the locking groove 5 of the key top 1 are , The key top 1 is lightly pressed down. As a result, the locking rod 13 of the link member 7 is snapped into the locking groove 4 while being guided by the locking guide portion 4A, and at the same time, the locking pins 23 and 24 of the link member 8 are connected to the locking guide portion 5A. Is snapped into the locking groove 5 while being guided. At this time, the strength and rigidity of the link member 7 are increased based on the presence of the locking rod 13, and the link member 7 is hardly deformed. Thus, the handling of the link member 7 is facilitated, and the assembly of the guide support member 6 and the key top 1 can be performed extremely easily. Thus, the connection between the guide support member 6 and the key top 1 is completed. With the above operations, the assembly of the support structure is completed.

Next, the operation of the key switch device assembled as described above will be described. Pressing the key top 1 below, together with the key top 1 is engaging bar 13 of the link member 7 with the downward movement rotates counterclockwise in the locking groove 4 of the locking unit 2, the link The locking pins 23 and 24 of the member 8 slide horizontally (rightward in FIG. 1) in the locking groove 5 of the locking portion 3. In this case, the link member 7, since the engaging rod 13 is formed, rather than the link member 7 based on the greater rigidity of the engagement rod 13 is deformed, therefore, the key top of the latch rod 13 Locking part 2 of 1
Can be smoothly rotated by the locking groove 4, and good operability of the key can be maintained. At the same time, the connecting rod 21 of the link member 8 rotates clockwise in cooperation with the locking projection 29A in the sliding groove 29 of the locking portion 27 in the holder plate 25, and the link member 7
The locking pins 15 and 16 slide horizontally (rightward in FIG. 1) in the sliding groove 28 of the locking portion 26.

As a result, the push rod 18 formed on the link member 8 moves downward and the rubber spring 31
Is gradually depressed, and when the depressed amount exceeds a certain limit, the rubber spring 31 is buckled. Thus, the movable electrode 31A in the rubber spring 31 short-circuits the switch electrode 30A on the flexible circuit board 30, and a predetermined switching operation is performed.

When the keytop 1 is depressed as described above, the keytop 1 is guided downward by the guide support member 6 including two link members 7 and 8, so that the keytop 1 is depressed. Irrespective of the position, it is moved while maintaining the horizontal state. Therefore, according to such a configuration, the pressing rod 18 of the link member 8 can apply a uniform pressing force to the rubber spring 31 over the entire length thereof, whereby any one of the switch portions S1 and S2 can be applied. Even when the rubber spring 31 is arranged in the first position, the switching of the rubber spring 31 can be reliably performed.

When the pressing of the key top 1 is released, the pressing rod 18 of the link member 8 is pushed upward by the elastic restoring force of the rubber spring 31. Accordingly, the phosphorus
Engagement rod 13, the locking pins 15, 16 of the click member 7, and, Li
The connecting rod 21 and the locking pins 23 and 24 of the link member 8 perform operations reverse to those described above, and as a result, the key top 1 is returned to the original position.

Here, since the locking rods 13 and the connecting rods 21 do not move in the horizontal direction but only rotate in the locking groove 4 and the sliding groove 29, respectively, the key top 1 is The key top 1 is vertically moved without being moved in the horizontal direction while maintaining the horizontal state of the key surface of the key top 1.

[0039] In the key switch device having a support structure of a long key according to the present embodiment as described above in detail, phosphorus
The connecting rod 21 is formed between one end of the plate-like body 17 in the locking member 8 and the connecting rod 21 is connected to the holder plate 2.
5, the locking projection 29A in the sliding groove 29 of the locking portion 27.
And the connecting rod 21 can perform the same operation as the wire member in the conventional support structure, so that the wire member is not required as a separate member at all. can do. Thus, the number of components required for the support structure for the long key can be reduced, and the cost of the entire support structure can be reduced.

The connection of the connecting rod 21 to the locking portion 27 is performed only by sliding on the holder plate 25 until the connecting rod 21 gets over the locking projection 29A of the sliding groove 29. As compared with the case of assembling using a separate wire member, the assembling work of the support structure can be significantly simplified, and the cost of the support structure can be reduced from this point as well. .

[0041] Further, the key top 1, regardless of its position pressed, because it can be moved and guided in the vertical direction while retaining reliably horizontally through the guide support member 6 made of the link members 7 and 8, the link The push rod 18 of the member 8 can exert a uniform push force on the rubber spring 31 throughout, so that the rubber spring 31 is disposed at any switch portion S on the holder plate 25 below the keytop 1. However, the switching operation of the rubber spring 31 can be surely performed.

The length of the key top 1 and each link
Since the lengths of the locking rods 13 and the connecting rods 21 of the locking members 7 and 8 are set to an integral multiple of the length of the switch portion S provided on the holder plate 25, the key top 1 is placed on the holder plate 25. It can be arranged at a desired position. Further, between one ends of the pair of plate-like bodies 9 in the link member 7,
Since the locking rod 13 is formed integrally and the locking rod 13 is rotatably locked in the locking groove 4 of the locking portion 2 of the key top 1, the link member is provided based on the presence of the locking rod 13. Since the strength and rigidity of the link member 7 are increased and it is difficult to deform, the handling of the link member 7 is facilitated, and the assembly of the guide support member 6 and the key top 1 is extremely easily performed. it can. In addition, Li
The link member 7, since the engaging rod 13 is formed, the link member 7 based on the greater rigidity of the engaging bar 13
Is not deformed, so that the locking rod 13 can be smoothly rotated in the locking groove 4 of the locking portion 2 of the key top 1, and the key operability can be maintained satisfactorily.
Also, the left inner wall of the sliding groove 29 and the locking projection 29A form
The rotation center of the formed rotation hole extends over each switch section S.
The locking rod 21 and the rotation hole
To prevent misalignment from occurring
Can be. Therefore, the movement of the link member 8
7, the sliding movement between the locking pins 15, 16 and the sliding groove 28
There is no trouble in the work, and the guide is supported as a whole
By part material 6 to improve the guiding action of the long key top 1
As a result, the operability of the key top 1 can be significantly improved.
You.

It should be noted that the present invention is not limited to the above-described embodiment, and various improvements and modifications can be made without departing from the spirit of the present invention. For example, the length of the key top is set to an integral multiple of the length of the switch unit S, but is not limited to the integral multiple.
A multiple other than an integral multiple such as 25 times, 2.5 times, or 2.75 times may be set.

[0044]

As described above, the present invention provides a long key
A plurality of keys arranged side by side with the holder member in the top area
-Each rotation center of the lower rotation locking part in the holding part
By placing them in a straight line across
The lower portion of the second link member locked by each lower rotation locking portion.
The end is displaced from the center of rotation of the lower rotation locking part.
Can be reliably prevented from being produced.
Operation of the second link member is lower than that of the first link member.
The sliding operation between the end and the lower sliding engagement part may not interfere.
Guide of long key by guide support member as a whole
Improves operation and dramatically improves operability of long keys
be able to.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a key switch device having a support structure for a long key.

FIG. 2 is a plan view of one link member.

FIG. 3 is a plan view of the other link member.

FIG. 4 is a cross-sectional view of the key switch device shown in FIG.

FIG. 5 is a plan view showing the key switch device shown in FIG. 1 except for a key top.

FIG. 6 is a plan view of a holder plate.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Key top 2, 3, 26, 27 Lock part 4, 5 Lock groove 6 Guide support member 7, 8 link member 13 Lock bar 15, 16, 23, 24 Lock pin 21 Connection bar 25 Holder plate 28, 29 Sliding groove 31 Rubber spring

Continuation of the front page (56) References JP-A 4-76224 (JP, U) JP-A 62-83330 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01H 13 / 14

Claims (1)

(57) [Claims] 1. A key tops elongated upper pivot locking portion and the upper sliding the locking portion is provided vertically from the back side, while being disposed below the elongated key top, long
Holding multiple keys side by side in the area of the key-top
The upper rotation locking of the holder member having a portion and the key holding portions in a side view.
Lower sliding engagement part formed on the diagonal position side with the part, and the side
The lower part formed on the diagonal position side with the upper sliding locking part in plan view
And a lower end , the upper end of which is locked by the upper rotation
A first link member locked to the lower sliding locking portion;
The end is locked by the upper sliding locking portion and the lower end is
The second link member locked by the lower rotation locking portion
To be arranged on the movable state, comprises a guide support member for guiding the vertical movement of the elongated key top, and a switching unit for performing a switching operation in accordance with the vertical movement of the elongated key tops, each Each rotation center of the lower rotation locking part in the key holding part
Are arranged in a straight line across multiple key holders.
A support structure for a long key.