CN114974974A

CN114974974A - Push-button

Info

Publication number: CN114974974A
Application number: CN202110220965.1A
Authority: CN
Inventors: 黄恒仪; 刘信鸿; 刘应蓝; 郭奕竹
Original assignee: Chongqing Dafang Electronics Co ltd; Darfon Electronics Corp
Current assignee: Chongqing Dafang Electronics Co ltd; Darfon Electronics Corp
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2022-08-30

Abstract

The invention relates to a key, which comprises a keycap, a bottom plate, a light-emitting element and a lifting mechanism. The bottom plate is arranged opposite to the keycap. The light-emitting element is exposed from the bottom plate and is positioned below the keycap. The lifting mechanism is arranged between the base plate and the keycap and movably connected with the keycap and the base plate, so that the keycap can move up and down relative to the base plate, the light-emitting element is positioned in the vertical projection range of the lifting mechanism, the lifting mechanism is provided with a cap end part, a bottom end part and a shading retaining wall, the cap end part is connected with the keycap, the bottom end part is connected with the base plate, the shading retaining wall extends from the cap end part to the base plate, and/or the shading retaining wall extends from the bottom end part to the keycap so as to shade the light emitted by the light-emitting element. The key has the advantages of controlling halo expression around the key and avoiding visual discomfort for a user.

Description

Push-button

Technical Field

The present invention relates to a key, and more particularly, to a key including a lifting mechanism having a light shielding function.

Background

As far as the current usage habits of desktop computers, notebook computers, smart phones or tablet computers are concerned, the keyboard is one of the indispensable input devices for inputting characters, symbols or numbers. The development of the key and the keyboard emphasizes the visual appeal in addition to the basic input function, for example, the key has a luminous visual effect when being used. Generally, the light-emitting design of the key is to arrange a light-emitting element such as a light-emitting diode and a circuit board electrically connected to the light-emitting element on a bottom plate, so that light emitted from the light-emitting element can be projected out of a keycap, thereby achieving the effect of light emission of the key.

However, the light emitting element has better light emitting power and brightness, and if light with too high brightness is emitted from the gap between the key cap and the bottom plate without being sufficiently diffused, the halo performance around the key will be affected, and the visual discomfort of the user may be caused.

Disclosure of Invention

The invention provides a key which can control halo expression around the key and avoid discomfort of users in vision.

According to an aspect of the present invention, the present invention provides a key, including:

a keycap;

the bottom plate is arranged opposite to the keycap;

a light emitting element exposed from the base plate and located below the keycap; and

the lifting mechanism is arranged between the base plate and the keycap and movably connected with the keycap and the base plate to ensure that the keycap can move up and down relative to the base plate, the lifting mechanism is provided with at least one cap end part connected with the keycap, and the cap end part extends towards the base plate to form a shading retaining wall so as to shade light rays emitted by the light-emitting element.

According to another aspect of the present invention, the present invention further provides another key, including:

a keycap;

the bottom plate is arranged opposite to the keycap;

the lifting mechanism is arranged between the bottom plate and the keycap and movably connected with the keycap and the bottom plate to enable the keycap to move up and down relative to the bottom plate, the lifting mechanism is provided with at least one bottom end part and at least one shading retaining wall, the bottom end part is connected with the bottom plate, and the shading retaining wall extends from the bottom end part to the keycap through the shading retaining wall so as to shade light rays emitted by the light-emitting element.

As an optional technical solution, the bottom plate further includes at least one bottom plate rib, the bottom side of the light-shielding retaining wall is concavely provided with at least one groove, and when the lifting mechanism is in the folding state, the bottom plate rib is accommodated in the groove.

As an optional technical solution, the light-shielding structure further includes a film circuit board, the film circuit board further includes at least one film rib, the bottom side of the light-shielding retaining wall is recessed to form at least one groove, and when the lifting mechanism is in the retracted state, the film rib is accommodated in the groove.

As an alternative solution, an opening is formed on the bottom plate, and the light emitting element is exposed from the opening.

As an alternative solution, the light emitting element enters the opening of the bottom plate, or the light emitting element is located below the opening.

As an optional technical solution, the light emitting element is disposed on a circuit board, and the circuit board is located under the bottom plate.

As an optional technical solution, the lifting mechanism includes a first supporting member and a second supporting member, and the at least one cap end portion is located on the first supporting member and/or the second supporting member.

As an optional technical solution, the first supporting member is disposed outside the second supporting member.

As an optional technical solution, the first supporting member further includes two opposite side arms, the two side arms are respectively connected to two ends of the cap end portion of the first supporting member, and the light-shielding retaining wall at least partially extends to the two side arms.

As an optional technical solution, the light emitting element is located within a vertical projection range of the lifting mechanism.

As an optional technical solution, the lifting mechanism further has at least one cap end, the cap end is connected to the key cap, the light-shielding retaining wall extends from the cap end to the bottom plate, and the light-shielding retaining wall extends from the bottom end to the key cap, so as to shield the light emitted by the light-emitting element.

As an optional technical solution, the key cap further includes a containing groove corresponding to the light-shielding retaining wall on the bottom end portion of the lifting mechanism, and when the lifting mechanism is in the retracted state, the light-shielding retaining wall is contained in the containing groove of the key cap.

In summary, in the key of the present invention, by the light-shielding retaining wall of the lifting mechanism, when the key cap is located at the highest position and the key cap is approaching to and away from the bottom plate, the light emitted from the light-emitting element can be effectively shielded, and is refracted and diffused for many times between the key cap and the bottom plate, so as to reduce the situation that the high-brightness light is too early to be directly emitted from the gap between the key cap and the bottom plate, achieve the effect of controlling the uniform halo performance generated by light leakage around the key, and avoid the discomfort of the user in vision.

The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.

Drawings

FIG. 1 is a schematic diagram of a key according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an appearance of a key according to an embodiment of the present invention in a standing state;

FIG. 3 is an exploded view of the key shown in FIG. 2;

FIG. 4A is a top plan view of FIG. 2;

FIG. 4B is a schematic sectional view taken along line A-A' of FIG. 4A;

fig. 5 is an appearance schematic diagram of a key according to an embodiment of the invention in a folded state;

FIG. 6A is a top plan view of FIG. 5;

FIG. 6B is a schematic sectional view taken along line B-B' of FIG. 6A;

FIG. 7 is an external view of the key shown in FIG. 2 from another perspective;

FIG. 8 is an external view of the key shown in FIG. 5 from another perspective;

FIG. 9 is an exploded view of a key according to an embodiment of the present invention;

FIG. 10A is a schematic cross-sectional view of a key of an embodiment of the present invention in a standing state; and

fig. 10B is a schematic cross-sectional view of a key in a folded state according to an embodiment of the invention.

Detailed Description

The key shading design of the present invention must take into account multiple factors simultaneously. First, in order to obtain the best illumination and light transmission effects for the characters on the keycap and to make the light-emitting element effectively used, the light generated by the light-emitting element must pass through the bottom plate as much as possible and enter the space between the keycap and the bottom plate to be repeatedly refracted and uniformly diffused. Secondly, in response to the increasing luminous power and brightness year by year and the application of multiple luminous elements in the electronic competition field, which are dedicated to a single key, the light entering between the keycap and the base plate must be prevented from being transmitted out from the gap between the keycap and the base plate too early, so that the element for shielding the light needs to be positioned between the keycap and the base plate. Moreover, the relative distance between the keycap and the bottom plate changes from time to time in the key operation, the light-transmitting gap exposed when the keycap is positioned at the lowest point is small, and the light-emitting effect can be shielded by fingers when a user presses the key; the light-transmitting gap exposed when the keycap is located at the highest point is the largest, so the light-shielding design must be carried out according to the relative position of the elements when the keycap is located at the highest point. However, for precision machines that operate the keys in a reciprocating manner, the thinning trend over the years has been to reduce the key stroke to below 2mm, and relatively to make all the elements and structures between the key cap and the bottom plate highly integrated, and the light shielding design must consider the interference problem of the reciprocating stroke of the whole key to ensure the normal operation of the key.

Fig. 1 is a schematic application diagram of a key according to an embodiment of the invention. As shown in fig. 1, the key 100 according to an embodiment of the invention can be used to form a keyboard 200, which is applied to an electronic device 300 such as a notebook computer or a stand-alone keyboard, for inputting data to the electronic device 300. The keyboard 200 may be comprised of a plurality of such keys 100. Fig. 2 is an appearance diagram of a key in a standing state according to an embodiment of the invention. Fig. 3 is an exploded view of the key shown in fig. 2. Fig. 4A is a top plan view of fig. 2. FIG. 4B is a schematic cross-sectional view taken along line A-A' in FIG. 4A. Fig. 5 is an external view of a key in a folded state according to an embodiment of the invention. Fig. 6A is a top plan view of fig. 5. FIG. 6B is a cross-sectional view taken along line B-B' in FIG. 6A. As shown in fig. 2 to 6B, each key 100 includes a key cap 110, a bottom plate 120, a light emitting device 130, and a lifting mechanism 140. The light emitting device 130 is coupled to the base plate 120 and located under the key cap 110. The lifting mechanism 140 is disposed between the base plate 120 and the key cap 110, and is used for the key cap 110 to move up and down relative to the base plate 120. The lifting mechanism 140 includes a first supporting member 141 and a second supporting member 142, wherein the first supporting member 141 and the second supporting member 142 are pivotally connected to each other in a crossed manner and movably connect the key cap 110 and the bottom plate 120, so as to complete the function of moving the key cap 110 up and down relative to the bottom plate 120. The light emitting element 131 is located within the vertical projection range of the lifting mechanism 140, for example, the first support 141 and the second support 142 are disposed around the light emitting element 131 of the light emitting device 130, and the first cap end 1411 of the first support 141 and the key cap 110 of the lifting mechanism 140 and the second cap end 1421 of the second support 142 and the key cap extend toward the bottom plate 120 to form the light blocking wall 143 to block the light emitted by the light emitting element 131.

The key cap 110 may be a letter key, a number key, a Space key (Space key), an Enter key (Enter key), etc., and the present invention is not limited to the type of the key cap 110. In addition, in the present embodiment, the bottom plate 120 may be a hard plate made of metal (such as iron, aluminum or alloy) or plastic. The first support 141 and the second support 142 of the lifting mechanism 140 may be cross-jointed scissors structure, or non-cross butterfly structure (positive V) or bat structure (inverse V); in any case, the first supporting member 141 and the second supporting member 142 of the lifting mechanism 140 together enclose a rectangular vertical projection range around the position where the light emitting element 131 is exposed from the bottom plate 120. Generally, the exposed positions of the light emitting element 131 and the bottom plate 120, and the lifting mechanism 140 and the vertical projection range thereof are located below the key cap 110. In addition, the lifting mechanism 140 may further include an elastic element 144, the elastic element 144 is disposed on the bottom plate 120 and located below the key cap 110, the first supporting member 141 and the second supporting member 142 are disposed around the light emitting element 131, and after the key cap 110 is pressed, the elastic force of the elastic element 144 and the first supporting member 141 and the second supporting member 142 are matched to reciprocate relative to the bottom plate 120. In addition, the key 100 further includes a thin film circuit board 150, the thin film circuit board 150 is disposed on the bottom plate 120, the thin film circuit board 150 may be a single layer or a multilayer and has a switch circuit, the key cap 110 may be indirectly or directly triggered in a process of approaching the bottom plate 120 by an external force pressing process, and the switch circuit is triggered to return to a highest position away from the bottom plate 120 by the elastic element 144 of the lifting mechanism 140, the first supporting member 141, and the second supporting member 142 after being triggered to be switched; in one embodiment, the elastic element 144 and the thin film circuit board 150 are light-transmissive elements.

In the present embodiment, when the lifting mechanism 140 is in the standing state of the lifting mechanism 140 (i.e. the key cap 110 is located at the highest position, and the distance between the key cap 110 and the bottom plate 120 is the largest), the light emitted from the light emitting element 131 is shielded by the light shielding walls 143 of the first support 141 and the second support 142 (see fig. 2 and 4B). In addition, during the process of the lifting mechanism 140 changing from the standing state of the lifting mechanism 140 to the folded state of the lifting mechanism 140 or the process of the lifting mechanism 140 changing from the folded state to the standing state of the lifting mechanism 140 (i.e. during the process of the key cap 110 moving downward to approach or move away from the bottom plate 120), the light emitted from the light emitting element 131 is also shielded by the light shielding walls 143 of the first support 141 and the second support 142 (see fig. 4B and fig. 6B). Accordingly, by the light-shielding walls 143 of the first support 141 and the second support 142, when the key cap 110 is at the highest position and the key cap 110 is close to and away from the bottom plate 120, the light emitted by the light-emitting element 131 can be effectively shielded, so as to prevent the light from passing through the gap between the first support 141 and the second support 142 when the lifting mechanism 140 is in a standing state, thereby reducing the light from passing through the gap between the key cap 110 and the bottom plate 120, and achieving the effects of controlling halo performance around the key 100 due to light leakage and preventing discomfort of a user in vision.

The first supporting member 141 and the second supporting member 142 may have different colors or/and different light transmittance levels to achieve different halo performances. Similarly, to achieve the effect of different halos, the first supporting member 141 and the second supporting member 142 may have different colors or/and light transmission degrees at different portions thereof, i.e., the first supporting member 141 and the second supporting member 142 may have more than two colors or/and light transmission degrees. The color and the light transmittance can be achieved by selecting and combining materials.

The first support 141 has a first cap end 1411 and a first bottom end 1412, the second support 142 has a second cap end 1421 and a second bottom end 1422, the first cap end 1411 and the second cap end 1421 are connected to the key cap 110, and the first bottom end 1412 and the second bottom end 1422 are connected to the bottom plate 120. The first bottom end 1412 of the first support 141 can be fixed on the base plate 120 through the first fixing element 121, and the second bottom end 1422 of the second support 142 can be fixed on the base plate 120 through the second fixing element 122; in an embodiment, the first fixing element 121 and the second fixing element 122 may be hooks, for example, and the hooks and the bottom plate 120 are integrally formed, that is, the hooks are a part of the bottom plate 120, and the hooks can be formed on the bottom plate 120 by a stamping process, for example, but the invention is not limited thereto. In addition, the first support 141 further includes opposite first and

second side arms

1413 and 1414, the second support 142 further includes opposite third and

fourth side arms

1423 and 1424, the first cap end 1411 of the first support 141 is connected to the first and

second side arms

1413 and 1414, the second cap end 1421 of the second support 142 is connected to the third and

fourth side arms

1423 and 1424, and the first and

second side arms

1413 and 1414 of the first support 141 are cross-pivoted with the third and

fourth side arms

1423 and 1424 of the second support 142; for example, the first side arm 1413 of the first support 142 and the third side arm 1423 of the second support 142 intersect and are pivotally connected to each other, and the second side arm 1414 of the first support 141 and the fourth side arm 1424 of the second support 142 intersect and are pivotally connected to each other.

Fig. 7 is an appearance schematic view of the key shown in fig. 2 from another viewing angle. Fig. 8 is an appearance schematic diagram of the key shown in fig. 5 from another viewing angle. In an embodiment, as shown in fig. 2, fig. 5, fig. 7 and fig. 8, the light-shielding walls 143 are disposed on the first cap end 1411 of the first supporting member 141 and the second cap end 1421 of the second supporting member 142 at the same time. However, in other embodiments, the light-shielding wall 143 may be disposed only on the first cap end portion 1411 of the first supporting member 141 or only on the second cap end portion 1421 of the second supporting member 142 according to the requirement of halo performance.

In the embodiment (fig. 2, 5, 7 and 8) in which the light-shielding walls 143 are disposed on the first cap end 1411 of the first support 141 and the second cap end 1421 of the second support 142 at the same time, each of the light-shielding walls 143 includes a first light-shielding wall 1431 and a second light-shielding wall 1432, the first light-shielding wall 1431 is disposed on the first cap end 1411 of the first support 141, the second light-shielding wall 143 is disposed on the second cap end 1421 of the second support 142, and when the lifting mechanism 140 is in the standing state of the lifting mechanism 140 (i.e., the key cap 110 is at the highest position, and the distance between the key cap 110 and the base plate 120 is the largest), the light emitted from the light-emitting element 131 is shielded by the first light-shielding wall 143 and the second light-shielding wall 143 (see fig. 4B); in addition, in the process of the lifting mechanism 140 changing from the standing state of the lifting mechanism 140 to the retracted state of the lifting mechanism 140 or in the process of the lifting mechanism 140 changing from the retracted state of the lifting mechanism 140 to the standing state of the lifting mechanism 140 (i.e. in the process of the key cap 110 moving downward toward or away from the bottom plate 120), the light emitted by the light emitting element 131 is also shielded by the first light shielding wall 143 and the second light shielding wall 143 (see fig. 4B and 6B), so as to achieve the effects of controlling the halo performance around the key 100 due to light leakage and preventing the user from discomfort visually.

In one embodiment, as shown in fig. 2 and 7, the light blocking walls 143 can extend to the side arms of the supporting members. For example, the first light-shielding wall 143 extends from the first cap end 1411 of the first support 141 to the first side arm 1413 and the second side arm 1414 of the first support 141, the second light-shielding wall 143 extends from the second cap end 1421 of the second support 142 to the third side arm 1423 and the fourth side arm 1424 of the second support 142, that is, the first light-shielding wall 143 is disposed on the first cap end 1411, the first side arm 1413 and the second side arm 1414 of the first support 141, and the second light-shielding wall 143 is disposed on the second cap end 1421, the third side arm 1423 and the fourth side arm 1424 of the second support 142, so as to achieve the desired halo performance.

In an embodiment, as shown in fig. 2, 3, 5, 7 and 8, the bottom plate 120 further includes a bottom plate rib 123, the bottom plate through hole 125 is adjacent to both sides of the bottom plate rib 123, and the bottom side of the light blocking wall 143 is recessed into the forming groove 145. During the transition of the lifting mechanism 140 from the standing state of the lifting mechanism 140 to the collapsed state of the lifting mechanism 140 (i.e., during the downward approach of the key cap 110 to the base plate 120), the base plate ribs 123 enter the grooves 145. When the lifting mechanism 140 is in the retracted state, the bottom rib 123 is received in the groove 145, and the light blocking walls 143 are located at two sides of the bottom rib 123. For example, the bottom plate ribs 123 include first bottom plate ribs 1231 and second bottom plate ribs 1232, the groove 145 includes a first groove 1451 and a second groove 1452, the first groove 1451 is recessed at the bottom side of the first light-shielding wall 1431, the second groove 1452 is recessed at the bottom side of the second light-shielding wall 1432, the first bottom plate ribs 1231 enter the first groove 1451 and the second bottom plate ribs 1232 enter the second groove 1452 during the process of the lifting mechanism 140 transforming from the standing state of the lifting mechanism 140 to the folded state of the lifting mechanism 140 (i.e., during the process of the key cap 110 approaching the bottom plate 120 downward); when the lifting mechanism 140 is in the retracted state, the first base rib 1231 is received in the first groove 1451, the second base rib 1232 is received in the second groove 1452, the first light-shielding retaining wall 1431 is located at two sides of the first base rib 1231, and the second light-shielding retaining wall 1432 is located at two sides of the second base rib 1232. The number of first groove 1451, second groove 1452, first base plate rib 1231 and second base plate rib 1232 is not limited in the present invention.

Fig. 9 is an exploded view of a key according to an embodiment of the invention. Referring to fig. 9, in another embodiment, the film circuit board 150 includes at least one film rib 151 corresponding to the bottom plate rib 123, two sides of the film rib 151 are adjacent to the film through hole 152, and the bottom side of the light blocking wall 143 is recessed with at least one groove 145, when the lifting mechanism 140 is in the retracted state, the film rib 151 and the bottom plate rib 123 are simultaneously accommodated in the groove 145 of the light blocking wall 143, and the light blocking wall 143 is accommodated in the film through hole 152 and the bottom plate through hole 125. In other embodiments, only the film circuit board 150 has the film rib 151 and the adjacent film through hole 152, and the bottom plate 120 has no rib and only one through large bottom plate through hole 125, when the lifting mechanism 140 is in the retracted state, the film rib 151 is received in the groove 145 of the light blocking wall 143, and the light blocking wall 143 is received in the film through hole 152 and the bottom plate through hole 125.

In an embodiment, as shown in fig. 7, the second cap end 1421 of the second support 142 has a rod-like structure 1425, and the bottom of the key cap 110 may be provided with a corresponding clamping element (not shown) for clamping and fixing on the rod-like structure 1425; for disposing the rod-like structure 1425, a corresponding top through hole 1426 is formed on the second cap end 1421, and a corresponding bottom notch 1427 is formed on the second light-shielding wall 1432, for example, the bottom notch 1427 is located at two sides of the second groove 1452 and is spaced apart from the second groove 1452, but the invention is not limited thereto.

In an embodiment, as shown in fig. 3, 4A and 6A, one of the two supporting members is disposed outside the other supporting member. For example, the first support 141 is disposed at the outer side of the second support 142, the first side arm 1413 and the second side arm 1414 of the first support 141 are disposed at the outer sides of the third side arm 1423 and the fourth side arm 1424 of the second support 142, the first cap end 1411 of the first support 141 is disposed at the outer side of the second bottom end 1422 of the second support 142, and the first bottom end 1412 of the first support 141 is disposed at the outer side of the second cap end 1421 of the second support 142; however, in other embodiments, the second supporting member 142 may be disposed outside the first supporting member 141.

In addition, the light emitting device 130 includes a circuit board 132, the light emitting device 130 includes the circuit board 132, the circuit board 132 is attached under the bottom plate 120, the light emitting element 131 is disposed on the circuit board 132, an opening 124 is formed on the bottom plate 120 corresponding to the position of the light emitting element 131, and the light emitting element 131 is exposed from the opening 124; in various embodiments, the light emitting elements 131 may enter the opening 124 of the base plate 120 or be located below the opening 124. The circuit board 132 is disposed with a wiring (not shown) to transmit power for the light emitting elements 131 to emit light. The position of the opening 124 of the bottom plate 120 and the light emitting element 131 may be at least partially located below the elastic element 144, so that the light of the light emitting element 131 passes through the elastic element 144, or the position of the opening 124 of the bottom plate 120 and the light emitting element 131 may not overlap the elastic element 144 at all.

Fig. 10A is a schematic cross-sectional view of a key of an embodiment of the invention in a standing state. Fig. 10B is a schematic cross-sectional view of a key according to an embodiment of the invention in a folded state. Referring to fig. 10A and 10B, in another embodiment, the lifting mechanism 140 further includes another light-shielding wall 146 for shielding the light of the light-emitting element 131, and the another light-shielding wall 146 is located on the bottom end portion of the lifting mechanism 140 connected to the base plate 120 and extends toward the key cap 110; in one embodiment, the light blocking wall 146 may be disposed on the first bottom end 1412 of the first support 141 and/or the second bottom end 1422 of the second support 142 of the lifting mechanism 140. The key cap 110 further includes a receiving slot 111 corresponding to the light blocking wall 146, and when the lifting mechanism 140 is in the retracted state, the light blocking wall 146 is received in the receiving slot 111 of the key cap 110. Due to the location at the bottom end (i.e., the first bottom end 1412 and/or the second bottom end 14) ²² ) The upper light-shielding wall 146 is closer to the light-emitting element 131, so that more high-brightness light of the light-emitting element 131 can be shielded.

In summary, in the key of the embodiments of the invention, by the light-shielding retaining wall of the lifting mechanism, when the key cap is located at the highest position and the key cap is approaching to and moving away from the bottom plate, the light emitted by the light-emitting element can be effectively shielded, so as to reduce the light from the gap between the key cap and the bottom plate, thereby achieving the effects of controlling the halo performance caused by light leakage around the key and avoiding discomfort of a user in vision.

The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.

Claims

1. A key, comprising:

a keycap;

the bottom plate is arranged opposite to the keycap;

2. A key, comprising:

a keycap;

the bottom plate is arranged opposite to the keycap;

the lifting mechanism is arranged between the bottom plate and the keycap and movably connected with the keycap and the bottom plate to enable the keycap to move up and down relative to the bottom plate, the lifting mechanism is provided with at least one bottom end part and at least one shading retaining wall, the bottom end part is connected with the bottom plate, and the shading retaining wall extends from the shading retaining wall to the keycap from the bottom end part so as to shade light rays emitted by the light-emitting element.

3. The key of claim 1 or 2, wherein the bottom plate further comprises at least one bottom plate rib, the bottom side of the light-shielding wall is recessed to form at least one groove, and the bottom plate rib is received in the groove when the lifting mechanism is in the retracted state.

4. The key of claim 1 or 2, further comprising a film circuit board, wherein the film circuit board further comprises at least one film rib, the bottom side of the light-shielding wall is recessed to form at least one groove, and when the lifting mechanism is in the retracted state, the film rib is received in the groove.

5. The key according to claim 1 or 2, wherein an opening is formed in the base plate, and the light emitting element is exposed from the opening.

6. The key of claim 5, wherein the light emitting element enters the opening of the base plate or is located below the opening.

7. The key of claim 1 or 2, wherein the light emitting element is disposed on a circuit board, the circuit board being located under the bottom plate.

8. The key of claim 1 or 2, wherein the lifting mechanism comprises a first support member and a second support member, and the at least one cap end is located on the first support member and/or the second support member.

9. The key of claim 8, wherein the first supporting member is disposed outside the second supporting member.

10. The key of claim 8, wherein the first support member further comprises two opposite side arms, the two side arms are respectively connected to two ends of the cap end of the first support member, and the light blocking wall at least partially extends to the two side arms.

11. The key of claim 1 or 2, wherein the light emitting element is located within a vertical projection of the lifting mechanism.

12. The key of claim 2, wherein the lifting mechanism further comprises at least one cap end connected to the key cap, the light blocking wall extends from the cap end to the bottom plate and extends from the bottom end to the key cap for blocking light emitted from the light emitting element.

13. The key of claim 2 or 12, wherein the key cap further comprises a receiving slot corresponding to the light-shielding wall at the bottom end of the lifting mechanism, and the light-shielding wall is received in the receiving slot of the key cap when the lifting mechanism is in the retracted state.