TW201503190A - Key cap plate module made by integral injection - Google Patents

Abstract

A key cap plate module made by integral injection includes a supporting frame, on which a plurality of key cap installation holes are defined by a plurality of sets of interlacing fulcrums. Each key cap installation hole is installed with a key cap body. Each key cap body has a first wall and a second wall with respect to each fulcrum. Each key cap body has at least three connection arms that connect the first wall and the second wall. The connection arms, the key cap bodies, and the fulcrums are made by integral injection so that each key cap body is able to carry out a trigger displacement procedure relative to a circuit board, which outputs a keyboard signal accordingly. Therefore, an issue that a keyboard can not be made thinner due to a limitation of a connecting mechanism of a conventional keyboard structure is solved.

Description

One-shot production of the keycap tablet module

The invention relates to a pressing structure of a keyboard, in particular to a keycap flat panel module which is produced by integral injection.

There are many input devices for computer systems, such as CD players, mice, keyboards, etc., among which the keyboard is the most important. The keyboard is generally disclosed in the Chinese Patent No. 445471, No. I220213, and No. M346861. Generally, there is a key cap, a circuit board triggered by the key caps to generate a command signal, and a circuit board disposed on one side of the circuit board. a substrate, and an interlocking mechanism for connecting the keycap to the substrate at one end. In the above keyboard structure, when the keycap is displaced relative to the circuit board, the linkage mechanism is pressed downward to touch a circuit switch on the circuit board, so that the circuit switch is turned on to generate a corresponding control signal, if The keycap is unstressed to the circuit board, and the linkage mechanism provides the keycap with a resilient force to normally push the keycap away from the circuit board to have a height relative to the circuit board. However, although the above keyboard structure can achieve the purpose of inputting instructions, the linkage mechanism has a certain height, so that the keyboard structure has a certain thickness. Looking at the needs of today's computer design, most of the main demands of light and thin products, especially for notebook computers, the ratio of the thickness of the keyboard module to the overall thickness is a major factor affecting the thickness of the notebook. Therefore, each manufacturer has no A thin design that does not focus on the keyboard structure can significantly reduce the thickness.

In order to overcome the above problems, another manufacturer has proposed another keyboard structure design. As disclosed in the Patent No. M434979 of the Republic of China, the button is a combination of a first support member and a second support member to form a V-shaped structure. Overcoming the thickness problem caused by the implementation of the X-shaped structure of the conventional linkage mechanism. Or, as disclosed in the Patent No. M426075 of the Republic of China, the first support member and the second support member disposed around the keycap are used instead of the conventional linkage mechanism to reduce the overall thickness of the keyboard structure. Although the keyboard structure disclosed in the above patents can make the overall thickness thinner, in reality, only the interlocking mechanism is implemented in another form, and still needs to be assembled through transmission and has a certain height, that is, Although the above patent can make the keyboard structure thinner, it cannot improve the complicated and complicated assembly.

The main object of the present invention is to improve the problem that the conventional keyboard structure cannot be specifically thinned.

In order to achieve the above object, the present invention provides an integral shot production keycap flat panel module, the key cap flat panel module has a support frame body, and the support frame body defines a plurality of key cap assemblies by a plurality of sets of staggered support shafts. Each of the keycap assembly holes is provided with a keycap body, and each of the keycap bodies has a first wall surface and a second wall surface opposite to each of the support shafts, each of the keycap bodies having at least three a connecting arm connecting the first wall surface and the second wall surface, the connecting arms are integrally formed with the key cap body and the support shafts, and each of the connecting arms has a first shaft connecting portion and a connection An arm section of the first shaft joint, the first shaft joint is connected to the edge of the keycap body, and the arm section is bent from the first shaft joint to the each of the branches by a first bending point The axial direction extends between the first wall surface and the second wall surface and connects each of the support shafts.

In one embodiment, the thickness of each of the connecting arms is less than or equal to the thickness of each of the fulcrums.

In one embodiment, the thickness of each of the connecting arms is less than or equal to the thickness of each of the keycap bodies.

In one embodiment, each of the arm segments is parallel to each of the fulcrums and each of the keycap bodies.

In one embodiment, each of the fulcrums and each of the keycap bodies are parallel, and the arm sections have a slope.

In one embodiment, the first shaft segment is coupled to each of the first wall surface and the arm segment is coupled to each of the second wall surfaces at the same height, and the arm segment and each of the key caps The body and each of the fulcrums are of the same plane.

In an embodiment, the first shaft segment is coupled to each of the first wall surface and the arm segment is coupled to each of the second wall surfaces at a height different from each other, and the arm segment is opposite to each of the keys. The cap body and each of the fulcrums have an oblique angle.

In addition to the above-described implementation structure, the present invention also provides a keycap flat panel module of another embodiment, which also has a support frame, and the support frame defines a plurality of keycap assemblies by a plurality of sets of staggered support shafts. hole. Each of the keycap assembly holes is respectively provided with a keycap body, and each of the keycap bodies has a first wall surface and a second wall surface opposite to each of the support shafts, and each of the keycap bodies has at least three connections. a first wall surface and a connecting arm of the second wall surface, the connecting arms are integrally formed with the key cap bodies and the support shafts, and each of the connecting arms has a first shaft connecting section and a second shaft a connecting section and an arm section connecting the first and second shaft joints, the first shaft joint is connected to the edge of the keycap body, and the arm section is subjected to a first bending by the first shaft joint The second shaft joint is formed by extending a point between the first wall surface and the second wall surface and extending through a second bending point to each of the support shafts.

In one embodiment, the thickness of each of the connecting arms is less than or equal to the thickness of each of the fulcrums.

In one embodiment, the thickness of each of the connecting arms is less than or equal to the thickness of each of the keycap bodies.

In one embodiment, the arm segment is parallel to each of the fulcrums and each of the keycap bodies.

In one embodiment, each of the fulcrums and each of the keycap bodies are parallel, and the arm sections have a slope.

In an embodiment, the arm segment has a slope, and the length of the first shaft segment is less than the length of the second shaft segment.

In an embodiment, the arm segment has a slope, and the length of the first shaft segment is greater than the length of the second shaft segment.

In an embodiment, the first shaft segment is connected to each of the first wall surface and the second shaft segment is connected to each of the second wall surfaces at the same height, and the arm segment and each of the arm segments The key cap body and each of the support shafts are the same plane.

In one embodiment, the first shaft segment is coupled to each of the first wall surface and the second shaft segment is coupled to each of the second wall surfaces at a relative position height, and the arm segments are opposite each other. The keycap body and each of the support shafts have an oblique angle.

The keycap flat panel module produced by the present invention has the following features compared with the conventional keyboard structure:

First, the thickness of the keyboard can be specifically thinned. The invention supports the keycap body with the arm segment so as to suspend the circuit board a distance and provide the restoring force of the keycap body after being pressed by the force, instead of the conventional linkage mechanism, overcoming the previous keyboard thickness. It is limited to the height of the interlocking mechanism and cannot be thinned.

Second, the assembly is relatively simple. The invention eliminates the cumbersome fastening process of the linkage mechanism, and simplifies the keyboard assembly.

1‧‧‧Support frame

11, 11a‧‧‧ shaft

111‧‧‧ second wall

12‧‧‧Key Cap Assembly Hole

2‧‧‧Key Cap Body

21‧‧‧ side

211‧‧‧ first wall

22, 22a‧‧‧ end angle

3‧‧‧ connecting arm

31‧‧‧First shaft joint

32‧‧‧arm section

33‧‧‧First bend point

4‧‧‧ boards

41‧‧‧Instruction Trigger

51‧‧‧Light source

52‧‧‧Light guide plate

53‧‧ ‧ visor

54‧‧‧buffer support

55‧‧‧ Keyboard backplane

6‧‧‧Support frame

61, 61a‧‧‧ shaft

611‧‧‧ second wall

62‧‧‧Key cap assembly hole

7‧‧‧Key Cap Body

71‧‧‧ side

711‧‧‧ first wall

72, 72a‧‧‧End angle

8‧‧‧Connecting arm

81‧‧‧First shaft joint

82‧‧‧Second shaft joint

83‧‧‧arm section

84‧‧‧First bend point

85‧‧‧second bend point

9, 9a‧‧‧ key cap body

D1, D2, D3, D4‧‧‧ length

C1, C3, C4‧‧‧ slope

C2, C5‧‧‧ tilt angle

FIG. 1 is a top plan view of a first embodiment of a keycap flat panel module produced by an integral injection according to the present invention.

FIG. 2 is a perspective exploded view of the first embodiment of the keycap flat panel module of the present invention.

3 is a cross-sectional view showing a first embodiment of a keycap flat panel module manufactured by the present invention.

4 is a top plan view of a second embodiment of a keycap flat panel module manufactured by the present invention.

FIG. 5 is a top plan view of a third embodiment of a keycap flat panel module integrally produced by the present invention.

FIG. 6 is a top plan view of a fourth embodiment of a keycap flat panel module produced by an integral injection according to the present invention.

FIG. 7 is a cross-sectional view showing a fourth embodiment of the keycap flat panel module produced by the integral injection molding of the present invention.

FIG. 8 is a top plan view showing a fifth embodiment of the keycap flat panel module produced by the integral injection molding of the present invention.

FIG. 9 is a cross-sectional view showing a fifth embodiment of the keycap flat panel module produced by the integral injection molding of the present invention.

FIG. 10 is a top plan view of a sixth embodiment of a keycap flat panel module manufactured by the present invention.

FIG. 11 is a top plan view showing a seventh embodiment of a keycap flat panel module produced by an integral injection according to the present invention.

FIG. 12 is a cross-sectional view showing the eighth embodiment of the keycap flat panel module produced by the integral injection molding of the present invention.

FIG. 13 is a top plan view of a ninth embodiment of a keycap flat panel module integrally produced by the present invention.

FIG. 14 is a top plan view of a tenth embodiment of a keycap flat panel module for integral injection molding according to the present invention.

The detailed description and technical contents of the present invention will now be described as follows:

The present invention provides a keycap flat panel module that is integrally produced and manufactured. The keycap flat panel module can be applied to a plurality of keyboard structures, such as U.S. Patent Nos. US 7,154,059, US 7,628,500, US 7,504,596, and US 8,184,021. In the keyboard structure disclosed in US Pat. No. 8,292,444, here only a single illuminated keyboard structure is exemplified.

Referring to FIG. 1 to FIG. 3 , the key cap flat panel module of the present invention has a support frame 1 , and the support frame 1 has a plurality of sets of staggered support shafts 11 , and the support shafts 11 are on the support frame 1 . A plurality of keycap assembly holes 12 are defined. Each of the keycap mounting holes 12 has a keycap body 2 therein, each of the keycap bodies 2 having four sides 21 and four end corners 22, each side 21 having a side opposite to each of the support shafts 11 a first wall surface 211 and a second wall surface 111, each of the keycap bodies 2 having at least three connecting arms 3 connecting the first wall surface 211 and the second wall surface 111, and the supporting frames 1, the keys The cap body 2 and the connecting arms 3 are formed by integral injection. That is to say, when the key cap flat module is subjected to the in-mold ejection process, the support frame 1 and the keys are simultaneously formed in the mold. The cap body 2 and the connecting arms 3 are provided. Specifically, each of the connecting arms 3 has a first shaft connecting portion 31 and an arm portion 32 connecting the first shaft connecting portion 31. The first shaft connecting portion 31 is connected to either side of the keying body 2 One end corner 22 of the 21 extends to the second wall surface 111 of the support shaft 11, and the arm section 32 is connected to the first shaft joint 31 at a position corresponding to the end angle 22, with a first A bending point 33 extends between each of the sides 21 of each of the keycap bodies 2 and each of the support shafts 11 and extends to the other end angle 22a of each of the side edges 21, and is connected to each of the branches On the shaft 11a.

When the keycap flat panel module of the present invention is assembled, the support frame body 1 is stacked on a circuit board 4 having a plurality of command triggering portions 41, and each of the keycap mounting holes 12 corresponds to each of the command triggering portions. 41 settings. When the keycap 2 is normally unstressed, it is suspended in the keycap mounting hole 12, and when it is pressed by the command triggering portion 41, a trigger displacement stroke is performed to the command triggering portion 41. When the displacement stroke is triggered, the arm segment 32 is deformed by each of the key cap bodies 2, so that each of the keycap bodies 2 contacts the command triggering portion 41 to output a keyboard signal. When the applied external force disappears, each of the keycaps 2 is acted upon by the arm section 32 to return to the normal unstressed state, so that the keycap 2 is suspended in the keycap mounting hole 12. Furthermore, the present invention discloses that the key cap tablet module can be applied to a plurality of keyboard structures, such as the keyboard structure shown in FIG. 2, the keyboard structure can include a light source 51, a light guide plate 52, and a light shield. The plate 53, the plurality of buffer supports 54 and a keyboard bottom plate 55.

Further, the keycap flat panel module of the present invention can partially adjust the partial structure in order to respond to different feedback feelings caused by different materials or pressing. In the embodiment of FIG. 4, when the keycap flat panel is formed, each of the four sides 21 of the keycap body 2 has the connecting arm 3, that is, each of the first wall surface 211 and each of the first The connecting arm 3 is connected between the two wall faces 111, respectively. Further, the key cap flat panel module can further adjust the thickness of each of the connecting arms 3 relative to each of the support shafts 11 or each of the keycap bodies 2, for example, the thickness of each of the connecting arms 3 is less than or equal to each The thickness of the support shaft 11, or the thickness of each of the connecting arms 3 is less than or equal to the thickness of each of the keycaps 2, as illustrated in Fig. 3. In this embodiment, the connecting arm 3 The thickness is smaller than each of the support shafts 11 and each of the keycap bodies 2, respectively. Referring to FIG. 1, each of the support shafts 11 of the present invention is parallel to each of the sides 21 of each of the keycap bodies 2, and the arm sections 32 of each of the connecting arms 3 extend from the first side. Between the wall surface 211 and the second wall surface 111, the arm segment 32 can be further parallel with the first wall surface 211 and the second wall surface 111, that is, the arm segment 32 and each of the support shafts 11 and Each of the sides 21 of each of the keycaps 2 is parallel. In addition to the parallel extending embodiment, the arm segment 32 can also have a slope C1, and the arm segment 32 extends between the first wall surface 211 and the second wall surface 111 according to the slope C1. As shown in Figures 5 and 6.

Referring to FIG. 1 and FIG. 3 , the first cap segment 31 is coupled to each of the first wall surface 211 and the arm segment 32 to be coupled to each of the first shaft segments 31 . The relative positions of the second wall surfaces 111 are the same in height, and the arm segments 32 are flush with each of the keycap bodies 2 and each of the support shafts 11. In addition to the above embodiment, referring to FIG. 7, the first shaft connecting portion 31 of the present invention is coupled to the height of each of the first wall surface 211 and the arm portion 32 connected to each of the second wall surfaces 111. Differently, the arm section 32 has an inclination angle C2 with respect to each of the keycap bodies 2 and each of the support shafts 11.

On the other hand, the keycap flat panel module of the integrated injection manufacturing of the present invention has another embodiment in addition to the above embodiment. Referring to FIG. 8 to FIG. 12 , the key cap flat panel module in this embodiment has a support frame 6 defined by a plurality of sets of staggered support shafts 61 defining a plurality of key cap assembly holes. 62. Each of the keycap assembly holes 62 is respectively provided with a key cap body 7, and each of the key cap bodies 7 has four sides 71 and four end angles 72, and each side 71 is opposite to each of the support shafts 61. One side of the keying body 7 has a first wall surface 711 and a second wall surface 611. Each of the keycap bodies 7 has at least three connecting arms 8 connecting the first wall surface 711 and the second wall surface 611. The connecting arms 8 of the present invention The keycap body 7 and the support shafts 61 are integrally formed, and in other words, when the keycap flat panel module is subjected to the injection process, the support frame body 6 and the keys are simultaneously formed in the mold. The cap body 7 and the connecting arms 8 are provided. Further, each of the connecting arms 8 has a first shaft connecting portion 81, a second shaft connecting portion 82, and an arm portion 83 connecting the first shaft connecting portion 81 and the second shaft connecting portion 82. The first shaft joint 81 is connected to the one end corner 72 of either side 71 of the keycap body 7 and extends toward the second wall surface 611 of the support shaft 61, and the arm section 83 is connected to the first A shaft joint 81 and a position corresponding to the end angle 72 extend from each of the sides 71 of each of the keycap bodies 7 and each of the support shafts 61 with a first bending point 84 and to each A position of the other end angle 72a of the side 71 extends, and a second bending point 85 is extended and connected to each of the support shafts 61 at the other end angle 72a of each side 71 to form the second shaft connection. Segment 82. The arm segment 83 normally supports the key cap body 7 to be suspended in the key cap assembly hole 62. When the key cap body 7 is subjected to the trigger displacement stroke by an external force, the arm segment 83 is deformed when the external force disappears. And interlocking the key cap body 7 to return to the normal position.

Further, in the embodiment, the keycap flat panel module can also be different according to the manufacturing material or the feedback feeling generated when pressing. The keycap flat panel module of the present invention can also partially adjust the partial structure. When the key cap flat panel is formed, each of the four sides 71 of the key cap body 7 has the connecting arm 8 respectively, that is, each of the first wall surface 711 and each of the second wall surfaces 611 are respectively connected with The connecting arm 8. In addition, the key cap flat panel module can further adjust the thickness of each of the connecting arms 8 relative to each of the support shafts 61 or the keycap body 7, for example, the thickness of each of the connecting arms 8 is less than or equal to each of the branches. The thickness of the shaft 61, or the thickness of each of the connecting arms 8, is less than or equal to the thickness of each of the keycaps 7.

Referring to FIG. 10, in the embodiment, each of the support shafts 61 is parallel with each of the sides 71 of each of the keycap bodies 6, and the arm segments 83 of the connecting arms 8 extend the first The wall surface 711 and the second wall surface 611 are further parallel to the first wall surface 711 and the second wall surface 611, in other words, the arm segment 83 and each of the support shafts 61 and each of the keys Each of the sides 71 of the cap 7 is parallel. Further, in addition to the embodiment in which the arm segments 83 extend in parallel to the first wall surface 711 and the second wall surface 611, the arm segment 83 can have a slope C3, and the arm segment 83 The slope C3 extends between the first wall surface 711 and the second wall surface 611, and the aspect thereof is as shown in FIG. Further, in an embodiment, the length D1 of the first shaft segment 81 of the connecting arm 8 is smaller than the length D2 of the second shaft segment 82, and the arm segment 83 has the slope C3. Referring to FIG. 11 , in addition to the above embodiment, the length D3 of the first shaft segment 81 of the connecting arm 8 may be greater than the length D4 of the second shaft segment 82, and the arm segment 83 is Another slope C4 extends obliquely between the first wall surface 711 and the second wall surface 611.

Furthermore, in the embodiment, the first cap segment 81 is coupled to each of the first wall surface 711 and the second shaft segment 82 to be coupled to each of the first shaft segments 81. The relative positions of the two walls 611 are the same height, in other words, the arm segments 83 extend horizontally between the first wall surface 711 and the second wall surface 611, and the arm segments 83 and each of the key cap bodies 7 are And each of the fulcrums 61 is the same plane, as shown in FIG. On the other hand, in conjunction with FIG. 12, the first shaft joint 81 can be coupled to each of the first wall surface 711 and the second shaft joint 82 to be coupled to each of the second wall surfaces 611. The positional heights are different such that the arm section 83 has an oblique angle C5 with respect to each of the keycap bodies 7 and each of the support shafts 61.

In addition, the embodiments of the present invention are exemplified by the fact that the key cap body 2 (or 7) is in a square shape, but it is not limited thereto, and may be formed into any geometrical state, such as a circle, etc. 13 and 14 are disclosed.

In summary, the key cap flat panel module of the present invention has a support frame body, and the support frame body defines a plurality of key cap assembly holes by a plurality of sets of staggered support shafts, and each of the key cap assembly holes The hole is provided with a key cap body, and each of the key cap bodies has four sides and four end angles, each side having a first wall surface and a second wall surface opposite to each of the support shafts, at least each of the key cap bodies The three sides have a connecting arm connecting the first wall surface and the second wall surface, and the connecting arms are integrally formed with the key cap bodies and the support shafts, so that each of the key cap bodies is opposite to a circuit board A trigger displacement stroke is performed to cause the board to output a keyboard signal. Thereby, the problem that the keyboard structure of the conventional keyboard is restricted by a linkage mechanism and the keyboard cannot be specifically thinned is obviously improved.

Domestic registration information [please note according to the registration authority, date, number order]

Foreign deposit information [please note according to the country, organization, date, number order]

1‧‧‧Support frame

11, 11a‧‧‧ shaft

12‧‧‧Key Cap Assembly Hole

2‧‧‧Key Cap Body

21‧‧‧ side

211‧‧‧ first wall

22, 22a‧‧‧ end angle

3‧‧‧ connecting arm

31‧‧‧First shaft joint

32‧‧‧arm section

33‧‧‧First bend point

Claims (16)

A keycap flat panel module for integrated injection production, comprising:
a support frame, wherein a plurality of sets of staggered support shafts define a plurality of key cap assembly holes;
The plurality of keycaps respectively disposed in each of the keycap assembly holes, each of the keycap bodies having four sides and four end angles, each of the sides having a first wall surface and a second wall surface opposite to each of the support shafts At least three sides of each of the keycap bodies have a connecting arm connecting the first wall surface and the second wall surface, and the connecting arms are integrally formed with the keycap bodies and the support shafts, and each The connecting arm has a first shaft connecting section and an arm section connecting the first shaft connecting section, the first shaft connecting section is connected to an angular position of one end of the one side, and the arm section is composed of the first shaft The connecting piece extends through a first bending point between the edge of the end angular position and each of the supporting shafts to the other end angle and connects each of the supporting shafts. The keycap flat panel module of claim 1, wherein the thickness of each of the connecting arms is less than or equal to the thickness of each of the support shafts. The keycap flat panel module of claim 1, wherein the thickness of each of the connecting arms is less than or equal to the thickness of each of the keycap bodies. The keycap flat panel module of the one-piece project of claim 1, wherein each of the arm segments is parallel to each of the pivot shafts and an edge of each of the keycap bodies. The keycap flat panel module of claim 1, wherein each of the support shafts and each of the keycap bodies are parallel, and the arm segments have a slope. The keycap flat panel module according to the above item 1, wherein the first shaft connecting portion is coupled to each of the first wall surface and the arm segment is coupled to each of the second wall surfaces. The height is the same, and the arm segment is the same plane as each of the keycap bodies and each of the support shafts. The keycap flat panel module according to the above item 1, wherein the first shaft connecting portion is coupled to each of the first wall surface and the arm segment is coupled to each of the second wall surfaces. The height is different, and the arm segment has an oblique angle with respect to each of the keycap bodies and each of the support shafts.
A keycap flat panel module for integrated injection production, comprising:
a support frame, wherein a plurality of sets of staggered support shafts define a plurality of key cap assembly holes;
The plurality of key caps respectively disposed in each of the keycap assembly holes, each of the keycap bodies having four sides and four end angles, each of the sides having a first wall surface and a first side opposite to each of the support shafts The two walls have a connecting arm connecting the first wall surface and the second wall surface on at least three sides of the key cap body, and the connecting arms are integrally formed with the key cap bodies and the support shafts, and Each of the connecting arms has a first shaft connecting section, a second shaft connecting section and an arm section connecting the first and second shaft connecting sections, and the first shaft connecting section is connected to one end corner of either side Position, the arm section extends from the first shaft joint to the other end angle between a side of the end point position and the support shaft through a first bending point, and at the other end corner of each side The second shaft joint is formed by extending a second bending point to each of the fulcrums. The keycap flat panel module according to the item 8 of claim 8, wherein the thickness of each of the connecting arms is less than or equal to the thickness of each of the support shafts. The keycap flat panel module of the item of claim 8, wherein the thickness of each of the connecting arms is less than or equal to the thickness of each of the keycap bodies. The keycap flat panel module of the item of claim 8, wherein the arm segment is parallel to the side of each of the pivot shafts and each of the keycap bodies. The keycap flat panel module according to the item 8 of claim 8, wherein each of the support shafts and the side of each of the keycap bodies are parallel, and the arm segments have a slope. The keycap flat panel module of claim 12, wherein the arm segment has a slope, and the length of the first shaft segment is less than the length of the second shaft segment. The keycap flat panel module of claim 12, wherein the arm segment has a slope, and the length of the first shaft segment is greater than the length of the second shaft segment. The keycap flat panel module of claim 8, wherein the first shaft connecting portion is coupled to each of the first wall surface and the second shaft connecting portion to each of the second wall surfaces. The relative positions are the same height, and the arm segments are flush with each of the keycap bodies and each of the support shafts. The keycap flat panel module of claim 8, wherein the first shaft connecting portion is coupled to each of the first wall surface and the second shaft connecting portion to each of the second wall surfaces. The relative positions are different in height, and the arm segments have an oblique angle with respect to each of the keycap bodies and each of the support shafts.