Silica gel key capable of being conducted in advance and prolonging service life and keyboard structure

Abstract

The utility model discloses a silica gel key capable of being conducted in advance and prolonging the service life and a keyboard structure. A triggering part on the axial inner side of a pressing part of the silica gel key is provided with a triggering extension part, and the bottom of a groove on the axial outer side of the pressing part is provided with a deepened groove; the silica gel key is applied to a keyboard structure, the supporting part is connected to the key cap, the pressing part is connected to the thin-film circuit switch, and the radius of the pressing part is larger than that of the spacer hole of the middle-layer partition plate. After the silica gel key is used for assembling a key structure, when the silica gel key is pressed down, the triggering extension part of the silica gel key can be effectively controlled to touch the thin film circuit switch, so that the FP and the S2 can be triggered almost simultaneously, the conductive sensitivity can be greatly improved, and the circumferential space corresponding to the bending point is large, so that the service life of the silica gel key is prolonged. And the silica gel with more volume can bear the force borne by the bending point at the inclined wall when being pressed, so that the service life is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of keyboards, in particular to a silica gel key and keyboard structure with early conduction and improved service life. Background Art

[0002] like Figure 1 As shown, a conventional membrane keyboard for a notebook computer mainly includes a keycap 30 and a base plate 50, an X-shaped bracket 40 arranged between the keycap 30 and the base plate 50, a layer of membrane circuit switch 10 arranged on the base plate 50, and a silicone key 20 arranged between the keycap 30 and the membrane circuit switch 10, and the X-shaped bracket 40 is used to fix and stabilize the keycap 30; wherein the membrane circuit switch 10 includes an upper circuit, a lower circuit, and a middle partition arranged between the upper circuit and the lower circuit.

[0003] Among them, reference Figure 2 The conventional silicone key 20 in the above-mentioned membrane keyboard is in an inverted bowl shape, which mainly includes a support portion 21, an elastic connection portion 22 and a pressing portion 23. The pressing portion 23 has a protruding trigger portion 231 on the axial inner side, and a flat-bottomed groove 232 is provided on the axial outer side of the pressing portion 23 to overcome the problem of large deformation force caused by simply extending the length of the trigger portion 231. The support portion 21 is also provided with an exhaust groove 211 that passes through the inside and outside. The bowl-shaped support portion 21 is installed on the membrane circuit switch 10 to play a supporting role, and the bowl-bottomed pressing portion 23 is used to contact the keycap 30. Figure 3 As shown, when the keycap 30 is pressed, the axial outer end of the pressing portion 23 of the silicone key 20 first contacts the keycap 30 and is driven by the keycap 30 and triggered axially downward, and then the triggering portion 231 at the axial inner end of the pressing portion 23 applies pressure to the inner membrane circuit switch 10 to drive the electrode contact points 11 of the upper and lower layers of the membrane circuit switch 10 to contact each other through the spacer holes opened at the corresponding positions of the middle layer partition to achieve conduction, and after the pressing is cancelled, the elastic connecting portion 22 of the silicone key 20 is reset to reset the pressing portion 23 and drive the keycap 30 to reset.

[0004] Since the silicone keypad 20 of the prior art is usually made of silicone material and is integrally molded by injection molding, when the silicone keypad 20 is Figure 3 When pressed, the trigger portion 231 at the inner end of the pressing portion 23 applies pressure to the inner membrane circuit switch 10 to drive the electrode contact points 11 in the membrane circuit switch 10 to contact each other and achieve conduction. The power-on point FP (Fire Point) generally falls on Figure 4After F2 shown in the figure, the reason is that the triggering part 231 at the axial inner end of the pressing part 23 is too far away from the surface of the membrane circuit switch 10 (wherein, the distance between the axial end of the triggering part 231 and the surface of the membrane circuit switch 10 is a, and the distance between the axial upper surface of the supporting part 21 and the surface of the membrane circuit switch 10 is h, and a>h). It is necessary to press a long distance for the triggering part 231 to hit the membrane circuit switch 10. The longer the pressing distance, the greater the deformation of the silicone button 20 at A. The excessive deformation of the silicone button 20 at A will cause conduction delay or even failure to conduct, especially when testing the corner conduction performance, it is more likely to have poor corner conduction; in addition, Figure 2 When testing the life of the silicone keypad 20 of the prior art, the bending point when F1 is generated by pressing down is relatively concentrated at the top neck of the silicone keypad 20 (eg Figure 3 (As shown in A in the middle), when pressed down, the circumferential space corresponding to the bending point is smaller and the service life is shorter.

[0005] In order to solve the above problems and improve the conductivity, the conventional method is to reduce the trigger force of the membrane circuit switch 10. However, if the conductivity is improved by simply reducing the trigger force of the membrane circuit switch 10, it is easy to cause over-sensitivity. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a silicone keypad with early conduction and improved life, including a silicone keypad with early conduction and improved life, comprising a supporting part, an elastic connecting part and a pressing part connected in sequence, the pressing part having a columnar trigger part on the axial inner side, a groove on the axial outer side of the pressing part, and the supporting part having an exhaust groove penetrating inside and outside;

[0007] The bottom of the groove has a deepening groove extending toward the axial inner end, and the trigger portion extends toward a trigger extension portion having an axial outer end and located in the groove;

[0008] The axial distance between the axial end of the trigger portion and the axial lower surface of the support portion is a, the distance between the axial upper surface of the support portion and the axial lower surface of the support portion is h, and a>h;

[0009] The axial height of the trigger extension portion is c, the sum of the depths of the groove and the deepened groove is d, and d>c.

[0010] Wherein, the supporting part, the elastic connecting part, the pressing part, the triggering part and the triggering extension part are integrally formed by using silicone material.

[0011] Wherein, the axial height of the trigger portion is b, and b>c.

[0012] Wherein, the axial depth of the deepened groove is e, and c>e.

[0013] Wherein, the side wall of the deepened groove has an acute inclination angle β relative to the horizontal groove bottom.

[0014] The utility model also provides a keyboard structure, comprising a keycap and a bottom plate, an X-shaped bracket arranged between the keycap and the bottom plate, a layer of membrane circuit switch arranged on the bottom plate, and a silicone key arranged between the keycap and the membrane circuit switch; wherein the membrane circuit switch comprises an upper circuit, a lower circuit, and a middle separator arranged between the upper circuit and the lower circuit;

[0015] The silicone key is a silicone key of the above structure that has early conduction and improved lifespan;

[0016] Wherein, the supporting portion of the silicone key is connected to the key cap, and the pressing portion of the silicone key is connected to the membrane circuit switch;

[0017] Wherein, the radius of the pressing portion is greater than the radius of the spacer hole of the middle layer spacer.

[0018] Furthermore, it also includes a positioning ring arranged on the inner side of the keycap, the inner diameter of the positioning ring is consistent with the outer diameter of the supporting part, and the silicone key is clamped in the positioning ring through the supporting part to achieve the connection between the silicone key and the keycap.

[0019] Through the above technical solution, the silicone key with a trigger extension portion opposite to the trigger portion provided by the utility model has the following beneficial effects after being used in the key structure assembly:

[0020] 1. When pressing the keycap, the elastic deformation of the elastic connection part first makes the inner side of the keycap contact the trigger part, and then the trigger extension part on the other side is driven downward by the trigger part, and the end of the trigger extension part contacts and hits the membrane circuit switch. Because the diameter of the spacer hole of the membrane circuit switch is smaller than the diameter of the pressing part, the trigger extension part of the silicone key can be effectively used to touch the membrane circuit switch and trigger FP when pressing down, so that FP and S2 can be almost simultaneous, which can greatly improve the conductive sensitivity, and has a good improvement on the conductive delay phenomenon during corner measurement, and is more responsive in use.

[0021] 2. Compared with the existing technology, the silicone key is reversely glued to the membrane circuit switch, so the keycap has better support, making the corner pressing force of the silicone key more precise;

[0022] 3. When F1 is generated by pressing down and bending, the bending point at the inclined wall is the same as that in the prior art and is located at the upper position. Therefore, the circumferential space corresponding to the bending point of the reversely set silicone button is larger, and more volume of silicone can withstand the force exerted on the bending point at the inclined wall when pressed, thereby effectively improving the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0024] Figure 1 It is a schematic axial cross-sectional view of a keyboard structure of the prior art before being pressed;

[0025] Figure 2 for Figure 1 The axial cross-sectional structure diagram of the existing structure silicone key is shown in FIG;

[0026] Figure 3 for Figure 1 The schematic diagram of the axial cross-sectional structure of the keyboard structure of the prior art when pressed is shown;

[0027] Figure 4 for Figure 2 The corresponding schematic diagram of the pressing force and travel of the existing structure silicone button is shown in;

[0028] Figure 5 It is a schematic axial cross-sectional view of the keyboard structure disclosed in the utility model before being pressed;

[0029] Figure 6 for Figure 5 The axial cross-sectional structure diagram of the silicone key disclosed by the utility model is shown in FIG.

[0030] Figure 7 for Figure 5 The schematic axial cross-sectional view of the keyboard structure disclosed by the utility model when pressed is shown;

[0031] Figure 8 for Figure 6 Schematic diagram of the corresponding pressing force and travel of the silicone button of the structure shown.

[0032] The numbers in the figure indicate: 10. membrane circuit switch; 11. electrode contact point; 20. silicone button; 21. support part; 211. exhaust groove; 22. elastic connection part; 23. pressing part; 231. trigger part; 232. groove; 2321. deepened groove; 233. trigger extension part; 30. keycap; 40. X-shaped bracket; 50. bottom plate; 60. positioning ring. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0034] Embodiment 1:

[0035] refer to Figure 6 , this embodiment 1 provides a silicone key with early conduction and improved life, including a supporting portion 21, an elastic connecting portion 22 and a pressing portion 23 connected in sequence, the pressing portion 23 has a columnar triggering portion 231 on the axial inner side, a groove 232 is provided on the axial outer side of the pressing portion 23, and the supporting portion 21 is provided with an exhaust groove 211 that passes through the inside and outside; the bottom of the groove 232 has a deepened groove 2321 extending toward the axial inner end, and the side wall of the deepened groove 2321 has an acute inclination angle β relative to the horizontal groove bottom, and the triggering portion 231 has a triggering extension portion 233 extending toward the axial outer end and located in the groove 232; the supporting portion 21, the elastic connecting portion 22, the pressing portion 23, the triggering portion 231 and the triggering extension portion 233 are integrally formed of silicone material.

[0036] Among them, the axial distance between the axial end of the trigger part 231 and the axial lower surface of the support part 21 is a, the distance between the axial upper surface of the support part 21 and the axial lower surface of the support part 21 is h, and a>h; the axial height of the trigger extension part 233 is c, the sum of the depths of the groove 232 and the deepened groove 2321 is d, and d>c; the axial height of the trigger part 231 is b, and b>c; the axial depth of the deepened groove 2321 is e, and c>e.

[0037] Embodiment 2:

[0038] refer to Figure 5 , this embodiment 2 provides a keyboard structure, including a keycap 30 and a bottom plate 50, an X-shaped bracket 40 arranged between the keycap 30 and the bottom plate 50, a layer of membrane circuit switch 10 arranged on the bottom plate 50, and a silicone key 20 arranged between the keycap 30 and the membrane circuit switch 10; wherein the membrane circuit switch 10 includes an upper circuit, a lower circuit, and a middle separator arranged between the upper circuit and the lower circuit;

[0039] Among them, the silicone button 20 is a silicone button of the structure described in Example 1, which has early conduction and improved life; the supporting part 21 of the silicone button 20 is connected to the keycap 30, and the pressing part 23 of the silicone button 20 is connected to the membrane circuit switch 10; the radius of the pressing part 23 is larger than the radius of the spacer hole of the middle partition.

[0040] In this embodiment 2, Figure 7As shown in FIG. 1 , when the keycap 30 is pressed, the elastic connection portion 22 is firstly elastically deformed to make the inner side of the keycap 30 contact the trigger portion 231, and then the trigger extension portion 233 on the other side is driven downward by the trigger portion 231, and the end of the trigger extension portion 233 is made to contact and hit the membrane circuit switch 10. Since the diameter of the spacer hole of the membrane circuit switch 10 is smaller than the diameter of the pressing portion 23, when pressing down, the trigger extension portion 233 of the control silicone key 20 can be effectively used to touch the membrane circuit switch 10 and trigger FP, so that FP and S2 can be almost simultaneously (as shown in FIG. 1 ). Figure 8 As shown), the conductive sensitivity can be greatly improved, and the conductive delay phenomenon during corner measurement is greatly improved, and the response is more agile in use; when the downward pressing bend produces F1, the bending point at the inclined wall is the same as that in the prior art and is in the upper position. Therefore, the reversely arranged silicone button 20 has a larger circumferential space corresponding to the bending point, and more volume of silicone can be used to withstand the force exerted on the bending point at the inclined wall when pressed, thereby effectively improving the service life.

[0041] Embodiment 3:

[0042] Based on Example 2, this Example 3 also includes a positioning ring 60 arranged on the inner side of the keycap 30, the inner diameter of the positioning ring 60 is consistent with the outer diameter of the support part 21, and the silicone key 20 is clamped in the positioning ring 60 through the support part 21 to achieve the connection between the silicone key 20 and the keycap 30.

[0043] In this embodiment 3, the pressing portion 23 on one side of the silicone key 20 is reversely adhered to the membrane circuit switch 10, and the other side uses the positioning ring 60 around the key cap 30 to position the supporting portion 21 of the silicone key 20 (the supporting portion 21 of the silicone key 20 can also be adhered to the key cap 30). The key cap 30 has better supporting force, making the corner pressing force of the silicone key more precise.

[0044] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to the above embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A silicone keypad with early conduction and improved service life, comprising a supporting portion (21), an elastic connecting portion (22) and a pressing portion (23) connected in sequence, wherein the pressing portion (23) has a columnar trigger portion (231) on the axial inner side, a groove (232) is provided on the axial outer side of the pressing portion (23), and the supporting portion (21) is provided with an exhaust groove (211) that penetrates inside and outside, characterized in that: The bottom of the groove (232) has a deepened groove (2321) extending toward the axial inner end, and the trigger portion (231) has a trigger extension portion (233) extending toward the axial outer end and located in the groove (232); The axial distance between the axial end of the trigger portion (231) and the axial lower surface of the support portion (21) is a, the distance between the axial upper surface of the support portion (21) and the axial lower surface of the support portion (21) is h, and a>h; The axial height of the trigger extension portion (233) is c, the sum of the depths of the groove (232) and the deepened groove (2321) is d, and d>c.

2. The silicone key according to claim 1, characterized in that: The support portion (21), the elastic connection portion (22), the pressing portion (23), the trigger portion (231) and the trigger extension portion (233) are integrally formed using a silicone material.

3. The silicone key according to claim 1, characterized in that: The axial height of the trigger portion (231) is b, and b>c.

4. The silicone key according to claim 3, characterized in that: The axial depth of the deepened groove (2321) is e, and c>e.

5. The silicone key according to claim 1, characterized in that: The side wall of the deepened groove (2321) has an acute inclination angle β relative to the horizontal groove bottom.

6. A keyboard structure, comprising a keycap (30) and a base plate (50), an X-shaped bracket (40) arranged between the keycap (30) and the base plate (50), a layer of a membrane circuit switch (10) arranged on the base plate (50), and a silicone key (20) arranged between the keycap (30) and the membrane circuit switch (10); wherein: The membrane circuit switch (10) comprises an upper circuit, a lower circuit, and a middle separator arranged between the upper circuit and the lower circuit; The feature is that: the silicone key (20) is a silicone key with early conduction and improved service life as described in any one of claims 1 to 5; Wherein, the supporting portion (21) of the silicone key (20) is connected to the key cap (30), and the pressing portion (23) of the silicone key (20) is connected to the membrane circuit switch (10); Wherein, the radius of the pressing portion (23) is greater than the radius of the spacer hole of the middle layer spacer.

7. The keyboard structure according to claim 6, characterized in that: It also includes a positioning ring (60) arranged on the inner side of the keycap (30), the inner diameter of the positioning ring (60) is consistent with the outer diameter of the support portion (21), and the silicone key (20) is clamped in the positioning ring (60) through the support portion (21) to achieve the connection between the silicone key (20) and the keycap (30).

Images