TWI680480B - Key module - Google Patents

Abstract

A key module includes a keycap, a bottom plate, and a scissors structure. The scissors structure has a first support member and a second support member, which are pivotally connected to the keycap and the bottom plate, respectively. The first support member has a plurality of convex shafts, the second support member has a plurality of shaft holes, and the convex shaft is movably pivotally connected to the shaft holes.

Description

Button module

The invention relates to a key module.

As far as personal computers are concerned, the keyboard is one of the indispensable input devices for entering text, symbols or numbers. However, with the development of the keyboard toward the trend of thinner and lighter, its internal space becomes more and more insufficient, so the traditional balance bar structure used to balance the force is less and less sufficient to be placed in the internal space, and it can not provide the key when pressed. Required structural strength.

Furthermore, the thinning and thinning trend also causes the keyboard to have a significantly insufficient actuating stroke when being pressed, and thus it is also difficult for the keys of the existing thin and light keyboard to provide the user with sufficient pressing feel.

Therefore, how to provide a key module with a sufficient actuation stroke in a limited space, and at the same time have its structural strength and balance of forces, is a topic that people in the field need to think about and solve.

The invention provides a key module, which is used in a thin and light keyboard. Provide sufficient structural strength and load balance under the requirements of external space.

The key module of the present invention includes a key cap, a bottom plate, and a scissors structure. The scissors structure has a first support member and a second support member, which are pivotally connected to the keycap and the bottom plate, respectively. The first support member has a plurality of convex shafts, the second support member has a plurality of shaft holes, and the convex shaft is movably pivotally connected to the shaft holes.

In an embodiment of the present invention, the key module further includes a thin film circuit board and an elastic member, and the thin film circuit board is disposed on the bottom plate. The elastic member is located between the keycap and the thin-film circuit board, and a part of the first support member and a part of the second support member are respectively pivotally connected to the bottom plate.

In an embodiment of the present invention, the above-mentioned first support member has a first body and a plurality of first extension portions, the first body is pivotally connected to the keycap, and the first extension portion extends from the first body toward the second support member. And pivotally connected to the bottom plate. The second support has a second body and a plurality of second extensions. The second body is pivotally connected to the keycap. The second extension extends from the second body toward the first support and is pivotally connected to the bottom plate. The first extension portion and the second extension portion cross each other.

In an embodiment of the present invention, the first extension portion has the convex shaft, and the second extension portion has the shaft hole. The first extension part and the second extension part are slidably pivotally connected at the intersection with each other by the convex shaft and the shaft hole.

In an embodiment of the present invention, an extension axis of the shaft hole is consistent with an extension axis of the first extension portion or an extension axis of the second extension portion.

In an embodiment of the present invention, each of the first support member and the second support member has at least one light transmitting hole.

In an embodiment of the present invention, the scissors structure is pivotally connected with the keycap and the bottom plate in the same axial direction, and is in a pivotal state without displacement.

In an embodiment of the present invention, the pivotal positions of the scissors structure, the keycap, and the bottom plate are symmetrically disposed with respect to the convex shaft or the shaft hole, respectively.

In an embodiment of the present invention, at least one of the first support member and the second support member includes a magnetically absorbing member, and the bottom plate further includes a magnetic generating member, and the magnetic generating member and the magnetically absorbing member correspond to each other.

In an embodiment of the present invention, the first support member and the second support member respectively have a first material and a second material, and the first material part partially covers the second material or the first material surrounds the second material. .

In an embodiment of the present invention, the first material is an elastic material, and the second material is a magnetically absorbing material.

In one embodiment of the present invention, the key module is a multiple key.

Based on the above, the key module is pivotally connected to the key cap and the bottom plate through the first support member and the second support member of the scissors structure, so that the first support member and the second support member pass through the convex shaft and the shaft hole. The first support member and the second support member are simultaneously pivoted and slid by the convex shaft and the shaft hole during the process of changing the structure of the scissors. Accordingly, by pivoting and sliding the first support member and the second support member to each other in the middle section, the pivots of the scissors structure, the keycap, and the bottom plate are located on opposite sides of the middle section, respectively. That is to say, the scissors structure is symmetrical to the keycap and the bottom of the base plate with respect to the middle section, so no matter where the keycap is pressed, the same torque can be generated relative to the middle section due to the above configuration. Therefore, it can maintain the dynamic balance state of the scissors structure during the changing state to avoid skew, and effectively provide the user with sufficient pressing feel under the premise of limited space and pressing stroke.

In order to make the above features and advantages of the present invention more comprehensible, embodiments are hereinafter described in detail with reference to the accompanying drawings.

100, 200, 300‧‧‧ button module

110, 210, 310, 410‧‧‧Scissor structure

112, 212, 312, 412‧‧‧ first support

112a, 112b, 114a, 114b, 212a, 212b, 214a, 214b, 312a, 312b, 314a, 314b, 412a, 412b, 414a, 414b

112c, 212c, 312c‧‧‧ convex shaft

114, 214, 314, 414, 514‧‧‧ second support

114c, 214c, 314c‧‧‧Shaft holes

112d, 114d, 212d, 214d, 212e, 214e

114e‧‧‧Guide

120, 220, 320‧‧‧ keycaps

121, 122, 221, 222, 321, 324 ...

123‧‧‧Driven rib

130, 230, 330‧‧‧ substrate

132, 232, 332‧‧‧ thin film circuit boards

132a‧‧‧Trigger coupler

134, 234, 334‧‧‧ floor

134a, 134b, 234a, 234b, 334a, 334b

140, 240, 340‧‧‧ elastic

350‧‧‧ Structure

360‧‧‧magnetism

A1, A2, A3, A4, A5, A6a, A6b, A11, A12, A13, A14‧‧‧parts

B1‧‧‧First Body

B2‧‧‧First extension

B3‧‧‧Second Body

B4‧‧‧Second Extension

A-A ’, B-B’‧‧‧ hatching

X-Y-Z‧‧‧right-angle coordinates

FIG. 1A is an exploded view of a key module according to an embodiment of the present invention.

FIG. 1B is a schematic diagram of a supporting member of a key module according to another embodiment of the present invention.

FIG. 2 illustrates the key module of FIG. 1A from another perspective.

3 is a top view of the key module of FIG. 1A in an assembled state.

4 and 5 are partial cross-sectional views of the key module in different states.

6A is a top view of a key module according to another embodiment of the present invention.

6B is a top view of a key module according to another embodiment of the present invention.

FIG. 7 is a partial cross-sectional view of the key module of FIG. 6A.

FIG. 8 is an exploded view of a key module according to another embodiment of the present invention.

FIG. 9 illustrates the keycap of FIG. 8 from another perspective.

FIG. 10 is a top view of a supporting member of a key module according to another embodiment of the present invention.

11 and 12 are partial cross-sectional views of a key module according to another embodiment of the present invention in different states.

FIG. 1A is an exploded view of a key module according to an embodiment of the present invention. FIG. 2 illustrates the key module of FIG. 1A from another perspective. FIG. 3 is a top view of the key module of FIG. 1A in an assembled state, in which the keycap is perspectively dashed to facilitate identification of other components obscured by the keycap. Please refer to FIG. 1A, FIG. 2 and FIG. 3 at the same time. In this embodiment, the key module 100 is a multiple key, which includes a key cap 120, a base 130 and a scissors structure 110. The scissors structure 110 includes a first support member 112 and a second support member 114, each pivotally connected to the keycap 120 and the base 130, wherein the first support member 112 has a convex shaft 112c, and the second support member 114 has a shaft hole 114c, and The convex shaft 112c is movably pivotally connected to the shaft hole 114c. The keycap 120 is adapted to be moved to the base 130 or away from the base 130 by force or not to change the state of the scissors structure 110. In the process of changing the state of the scissors structure 110, due to the interaction between the convex shaft 112c and the shaft hole 114c In combination, the first support member 112 and the second support member 114 pivot and slide relative to each other.

In addition, the key module 100 further includes an elastic member 140, such as a rubber dome. The substrate 130 includes a thin-film circuit board 132 and a bottom plate 134 stacked on each other. The elastic member 140 is located between the keycap 120 and the thin-film circuit board 132, and a part of the first support member 112 and a part of the second support member 114 are respectively pivoted to the bottom plate 134. When the keycap 120 is pressed by force, the keycap 120 moves to the base 130 and uses its driving rib 123 to press and deform the elastic member 140, so that the deformed elastic member 140 can further abut the thin film circuit 132, and then The trigger electrical coupler 132a of the trigger thin film circuit 132 causes the operating energy of the key module 100 to generate an electrical signal to the control system to reach the key mode. Once the predetermined function of the group 100 is released, the triggering state of the trigger coupling 132a is also released, and the elastic member 140 drives the keycap 120 to reset by its elastic force.

Further, as shown in FIG. 1A and FIG. 2, the first support member 112 and the second support member 114 each have a grid-like branch structure, and the first support member 112 has a first body B1 and at least one first extension portion (this The embodiment shows a plurality of first extension portions B2 as an example, but is not limited thereto.) The first body B1 is provided with a plurality of pivot shafts 112a, which are used to pivotally connect to the plurality of buckle portions 121 of the keycap 120. . The first extension portion B2 extends from the first body B1 toward the second support member 114, and is pivotally connected to the plurality of restricting portions 134 a of the base 130 by a plurality of pivots 112 b. Accordingly, one side of the keycap 120 can be coupled to the base 130 by the first support member 112 to form a link mechanism. In contrast, the second support member 114 has a second body B3 and at least one second extension portion (this embodiment shows a plurality of second extension portions B4 as an example, but is not limited thereto). The second body B3 is provided with A plurality of pivot shafts 114 a are used to pivotally connect to the plurality of latching portions 122 of the keycap 120. The second extension portion B4 extends from the second body B3 toward the first support member 112, and is pivotally connected to the plurality of restricting portions 134 b of the base 130 (the bottom plate 134) through a plurality of pivots 114 b. Accordingly, the other side of the keycap 120 can be coupled to the base 130 by the second support member 114 to form another link mechanism, wherein the first extension portion B2 and the second extension portion B4 are in a cross state with each other.

In addition, the bottom plate 134 is made of, for example, a metal plate, and the restricting portion 134a and the restricting portion 134b are, for example, stamped and bent from a metal plate. The openings of the first support member 112 and the pivot shaft 114b of the second support member 114 respectively provide pivoting and limiting effects.

4 and 5 are partial cross-sectional views of the key module in different states. Please refer to FIG. 1A, FIG. 4 and FIG. 5 again, wherein FIG. 4 and FIG. 5 are cross-sectional views along line A-A 'of FIG. 3, respectively, and the right-angle coordinates X-Y-Z are provided at the same time to facilitate the description of the components. In this embodiment, the first extension B2 has a convex shaft 112c, which is located in the middle section of the first extension B2, and the second extension B4 has a shaft hole 114c, which is located in the middle section of the second extension B4, and the shaft hole The extending direction of 114c coincides with the extending axial direction of the second extending portion B4. According to this, the first extension portion B2 and the second extension portion B4 can be slidably pivotally connected to each other by the convex shaft 112c and the shaft hole 114c at the intersection of each other.

In other words, the scissors structure 110 formed by the first support member 112 and the second support member 114 is pivotally connected to the keycap 120 and the base 130 in substantially the same axis (both along the X axis), and In a state of no-displacement pivoting, that is, there is only a single degree of freedom (only pivoting along the X axis) between the scissors structure 110 and the keycap 120 and between the scissors structure 110 and the base 130. Instead, the convex shaft 112c is matched with the shaft hole 114c to generate a lateral slip during pivoting (in the pressed state of FIG. 5, the shaft hole 114c substantially extends along the Y axis), and accordingly The scissors structure 110 operates smoothly.

As shown in FIG. 1A, to facilitate assembly, the second support member 114 of this embodiment further has a guide portion 114e provided on the second extension portion B4, and communicates with the shaft hole 114c, so that the convex shaft 112c can be assembled during assembly. The guide portion 114e smoothly moves into the shaft hole 114c.

At the same time, it can also be seen from FIGS. 4 and 5 that the pivotal positions of the scissors structure 110 with the keycap 120 and the base 130 are symmetrical with respect to the convex shaft 112c or the shaft hole 114c, respectively. Configuration. In this way, when the keycap 120 is pressed, both of them can form a consistent torque on the pivotal connection of the first support 112 and the second support 114 in the middle section, so that the scissors structure 110 can be changed in the state. The force in the medium is in dynamic equilibrium, so the distortion caused by uneven force is avoided. In particular, the key module 100 is applied to certain long or irregularly shaped multiple keys (such as SPACE, SHIFT, BACKSPACE, and ENTER function keys), which can improve the stability during exercise due to the above structural configuration. Compared with the prior art, it is necessary to additionally install a balance bar to overcome the problem. In this embodiment, the same effect can be achieved only by using the scissors structure, so unnecessary components (balance bars) are effectively saved, and The space requirement and manufacturing cost of the key module 100 are reduced, and at the same time, this is also beneficial to the application of the key module 100 to a thin and light keyboard.

FIG. 6A is a top view of a key module according to another embodiment of the present invention, in which a part of the keycap is perspectively broken to facilitate identification of other components obscured by the keycap. Fig. 7 is a partial cross-sectional view of the key module of Fig. 6A, which is formed along a section line B-B '. In this embodiment, the key module 200 includes a scissors structure 210, a keycap 220, a base 230, and an elastic member 240. The scissors structure 210 includes a first support 212 and a second support 214, and the base 230 includes a thin-film circuit board 232. With the bottom plate 234, the first support member 212 is pivotally connected to the latching portion 221 of the keycap 220 by its pivot 212a, and is pivotally connected to the restricting portion 234a by the pivot 212b. The second supporting member 214 is pivotally connected to the latching portion 222 of the keycap 220 through a pivot 214a thereof, and is pivotally connected to the restricting portion 234b through a pivot 214b. At the same time, the first support member 212 and the second support member 214 can be slidably pivoted to each other through the matching of the convex shaft 212c and the shaft hole 214c. In other words, the The key module 200 has substantially the same structural connection relationship with the foregoing embodiment, and it can be seen from FIG. 6A that, unlike the foregoing embodiment, the first support 212 and the second support 214 of the scissors structure 210 of this embodiment are different. This is equivalent to the aforementioned embodiment having a smaller number of extensions.

In other words, it can be clearly understood from the foregoing two embodiments that the key module 100 or 200 of the present invention can be applied to multiple keys with different lengths, and the designer can adjust the length according to requirements.

It should also be mentioned that the first support members 112, 212 and the second support members 114, 214 also have light transmitting holes 112d, 212d, 114d, and 214d, respectively, which are used to allow the light sources (not (Illustrated) The light generated can pass through the transparent holes 112d, 212d, 114d, and 214d and be projected to the keycaps 120 and 220 to provide the light-emitting key modules 100 and 200.

6B is a top view of a key module according to another embodiment of the present invention. Different from the foregoing embodiment, the first support member 212 and the second support member 214 each have only one light-transmitting hole 212e and 214e, which are respectively located in the first body of the first support member 212 and the second support member. 214's second body.

FIG. 8 is an exploded view of a key module according to another embodiment of the present invention. FIG. 9 illustrates the keycap of FIG. 8 from another perspective. In this embodiment, the key module 300 includes a scissors structure 310, a keycap 320, a base 330, and an elastic member 340. The scissors structure 310 includes a first support member 312 and a second support member 314, and the base 330 includes a thin-film circuit board 332. With the bottom plate 334, the first support member 312 is pivotally connected to the latching portion 321 of the keycap 320 by its pivot 312a, and is pivotally connected to the restricting portion 334a by the pivot 312b. Second support 314 is pivotally connected to the latching portion 322 of the keycap 320 by its pivot 314a, and is pivotally connected to the restricting portion 334b by the pivot 314b. At the same time, the first support member 312 and the second support member 314 can be slidably pivoted to each other by the combination of the convex shaft 312c and the shaft hole 314c. It can be clearly understood that the components and connection relationships of this embodiment are substantially the same as those of the foregoing embodiment.

However, different from the embodiment of FIGS. 1A to 7, the first support members 112 and 212 and the second support members 114 and 214 are respectively made of plastic material by injection molding. The first support in this embodiment The pieces 312 and the second support piece 314 are respectively made of different parts with different materials. The first support piece 312 includes portions A1 and A2 different from each other, and the second support piece 314 includes the pieces different from each other. Part A3 and Part A4. Here, the part A1 and the part A3 are made of, for example, a metal material, and are surrounded by the parts A2 and A4 made of, for example, a plastic material by a process of burying and injecting. That is, the portions A1 and A3 having better rigidity and structural strength are used as the main structure, and the portions A2 and A4 having better elasticity and flexibility are used as the surface structure, so that the first support 312 and the second The supporting member 314 also has the above-mentioned material characteristics. In this way, even if it is applied to a multiple of longer keys, its structural strength can be maintained, and the user can apply the scissors structure 310 to move the keycap 320 smoothly toward the keycap 320 regardless of the force applied by the user anywhere on the keycap 320. The base 330 prevents the skew of the keycap 320. At the same time, since the parts A2 and A4 with better elasticity and flexibility are used as the surface structure of the support member, it is advantageous for the assembly operation of the component and avoids the wear caused by the parts A1 and A3 with good rigidity directly contacting and interfering with each other.

This embodiment does not limit the structure of the support. FIG. 1B is another aspect of the present invention. A schematic diagram of a support member of a key module of an embodiment. Please refer to FIG. 1B. In this embodiment, the shaft hole 114c of the second support member 514 has a closed profile, and because the plastic material has better elasticity and flexibility, the convex shaft 112c can still buckle into the shaft hole 114c smoothly. . In other words, compared with the second support member 114 of the embodiment of FIG. 1A, the second support member 514 of this embodiment has no guide portion.

In addition, the key module 300 of this embodiment further includes a structural member 350, which is assembled to the buckling portion 324 of the keycap 320 to enhance the structural strength of the keycap 320.

FIG. 10 is a top view of a supporting member of a key module according to another embodiment of the present invention. The difference from the previous embodiment is that the support of this embodiment includes discontinuous parts A6a and A6b, which are equivalent to the aforementioned parts A1 and A3, which are materials with better rigidity, and part A5 is the same as the aforementioned part A2, A4 is a material with better elasticity and is used to cover and surround the periphery of parts A6a and A6b. Therefore, this embodiment can still achieve the effects described in the previous embodiment. At the same time, it can be further inferred from the two embodiments shown in FIG. 8 to FIG. 10 that the designer can further appropriately adjust the proportion and relative relationship of the different parts of the material according to the use requirements.

11 and 12 are partial cross-sectional views of a key module according to another embodiment of the present invention in different states. It should be noted that the key module of this embodiment is as shown in the foregoing FIG. 8 and FIG. 9, and the difference lies in the configuration relationship between the components of the support member and related components.

Here, the scissors structure 410 includes a first support member 412 and a second support member 414. The first support member 412 is pivotally connected to the latching portion 321 of the keycap 320 by its pivot 412a, and is pivotally connected to the pivot 412b. The restricting portion 334a of the base 330. In contrast, the second branch The supporting member 414 is pivotally connected to the latching portion 322 of the keycap 320 with its pivot 414a, and is pivotally connected to the restricting portion 334b of the base 330 with its pivot 414b. At the same time, the first support 412 and the second support 414 are slidably pivotally connected to each other through the convex shaft 312c and the shaft hole 314c. In other words, the connection relationship between the keycap 320, the scissors structure 310, and the base 330 is the same as that of the foregoing embodiment.

Further, the support member of this embodiment is also composed of parts with different materials. The first support member 412 is composed of the parts A13 and A14 with different materials, and the second support member 414 is made of different materials. The part A11 and the part A12 are composed of the parts A13 and A11. For example, the parts A13 and A11 are made of metal and have magnetic properties, and the parts A12 and A14 are the same as the parts A2 and A4 described above, which have better elasticity and flexibility. In the process of embedding and injecting, a part A14 is wrapped around the part A13, and a part A12 is wrapped around the part A11. Therefore, the scissors structure 410 of this embodiment can also achieve the same effect as the previous embodiment.

It should be noted that, because the first support member 412 and the second support member 414 are symmetrical to each other, the following description is made by taking the second support member 414 as an example. The first support member 412 does not have the same structural configuration. More details.

In this embodiment, as shown in the right side of FIG. 11 and FIG. 12, the key module further includes a magnetic generating member 360, such as a permanent magnet or an electromagnet, which is disposed at the thin-film circuit board 332 and the bottom plate 334 of the base 330, along the The Z-axis is located below the second support member 414 and corresponds to a portion A11 having magnetic attraction characteristics in the second support member 414 (to be considered as a magnetically absorbing member). Accordingly, as shown in FIG. 11, when the keycap 320 is not pressed by force, Part A11 extending to the right side of the pivot 414b will be magnetically attracted to the magnetic generating member 360, and as shown in FIG. 12, when the keycap 320 is pressed by force, part A11 extending to the right side of the pivot 414b will be far away from magnetic generation. Pieces 360. It can be known that the magnetic attraction of the magnetic generating member 360 and part A11 will provide the user with resistance when pressing the key module, so that the user can have a better feel for pressing the key.

In summary, in the above embodiment of the present invention, the key module is pivoted to the keycap and the base through the first support and the second support of the scissors structure, respectively, so that the first support and the first support The two support members are combined with each other by the combination of the convex shaft and the slide groove, so that the first support member and the second support member are simultaneously pivoted and slid by the convex shaft and the shaft hole during the process of changing the structure of the scissors. Mobile made. According to this, no matter where the keycap is pressed, it can maintain the dynamic balance state of the scissors structure during the changing state due to the above configuration, avoid skew, and effectively provide use under the premise of limited space and pressing stroke. Or enough pressure.

In addition, in addition to being made of a single structure, the scissors structure also includes a common composition of different materials, that is, the part with better rigidity and structural strength is used as the main structure, and the part with better elasticity and flexibility is buried. The injection process is wrapped around the main structure. In this way, the support can be smoothly moved without distortion due to the rigidity and structural strength when the keycap is pressed by the force, and the elasticity of the surface structure and The flexibility makes the key module smooth during the assembly operation, and avoids the components from contacting and interfering with each other to cause wear.

In addition, the bottom plate of the key module can be further provided with a magnetic generating member, which is located below the supporting member and corresponds to a portion of the supporting member having magnetic attraction characteristics. As a result, When the key module is not pressed, the magnetically attractable part and the magnetically generated part are attracted to each other. Therefore, when the user presses the keycap, it is bound to overcome the magnetic attraction force to successfully press down the keycap, thereby providing The user feels when pressing the button module.

Although the present invention has been disclosed as above with the examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some modifications and retouching without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be determined by the scope of the attached patent application.

Claims (11)

A key module includes: a keycap; a base plate; and a scissors structure, which has a first support member and a second support member, the first support member has a first body and a plurality of first extensions, The first body is pivotally connected to the keycap, the first extensions extend from the first body toward the second support, and are pivotally connected to the bottom plate. The second support has a second body and a plurality of first Two extensions, the second body is pivotally connected to the keycap, the second extensions extend from the second body toward the first support and are pivotally connected to the bottom plate, the first extensions and the first The two extending portions are in a cross state with each other, wherein the first support member has a plurality of convex shafts, the second support member has a plurality of shaft holes, and the convex shafts are respectively movably pivotally connected to the shaft holes. The key module according to item 1 of the scope of patent application, further comprising a thin film circuit board and an elastic member, the thin film circuit board is disposed on the bottom plate, the elastic member is located between the keycap and the thin film circuit board, the A part of the first support member and a part of the second support member are respectively pivotally connected to the bottom plate. The key module according to item 1 of the scope of patent application, wherein the first extensions have the convex shafts, the second extensions have the shaft holes, the first extensions and the The second extension is slidably pivoted together at the intersections of the convex shafts and the shaft holes. The key module according to item 3 of the scope of patent application, wherein each of the shaft holes has an extension direction, and the extension direction and the extension axis of the first extension portion or the extension axis of the second extension portion To be consistent. The key module according to item 1 of the scope of patent application, wherein the first support member and the second support member each have at least one light transmitting hole. The key module according to item 1 of the scope of patent application, wherein the scissors structure is pivotally connected to the keycap and the bottom plate in the same axial direction, and is in a state of non-displacement pivoting. The key module according to item 6 of the scope of patent application, wherein the pivotal positions of the scissors structure, the keycap, and the bottom plate are symmetrically arranged with respect to the convex shaft or the shaft hole. The key module according to item 1 of the scope of patent application, wherein at least one of the first support member and the second support member includes a magnetically absorbing member, and the bottom plate further includes a magnetic generating member, the magnetic generating member The pieces and the magnetically attractable pieces correspond to each other. The key module according to item 1 of the scope of patent application, wherein the first support member and the second support member have a first material and a second material, respectively, and the first material part partially covers the second material. The material or the first material is arranged around the second material. The key module according to item 9 of the scope of patent application, wherein the first material is an elastic material and the second material is a magnetically absorbing material. The key module according to item 1 of the patent application scope, wherein the key module is a multiple key.