CN110444424B - Key structure and electronic equipment - Google Patents
Key structure and electronic equipment Download PDFInfo
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- CN110444424B CN110444424B CN201910699349.1A CN201910699349A CN110444424B CN 110444424 B CN110444424 B CN 110444424B CN 201910699349 A CN201910699349 A CN 201910699349A CN 110444424 B CN110444424 B CN 110444424B
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- key
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- key cap
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/12—Movable parts; Contacts mounted thereon
- H01H13/14—Operating parts, e.g. push-button
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/23—Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof
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- Signal Processing (AREA)
- Push-Button Switches (AREA)
Abstract
The application discloses a key structure and electronic equipment applying the same. Wherein, the button structure includes: the shell is provided with an inner side face and an outer side face which are oppositely arranged, a guide hole is formed in the shell, and an opening of the guide hole extends to the outer side face; the light touch switch is arranged at the bottom of the guide hole; the key guide post is slidably arranged in the guide hole and positioned on one side of the light touch switch close to the outer side face, the key guide post comprises a switch contact end and a keycap contact end which are arranged oppositely, and the switch contact end is contacted with the light touch switch; the key cap is arranged at the opening of the guide hole on the outer side surface and is in contact with the key cap contact end; and the fool-proof structure is arranged between the key cap and the key cap contact end and is used for preventing the reverse installation of the key guide pillar. The touch switch matched with the key can be protected, and the persistence of the key function of the electronic equipment is guaranteed.
Description
Technical Field
The present disclosure relates to electronic devices, and particularly to a key structure and an electronic device using the same.
Background
With the rapid development and wide application of electronic devices (such as mobile phones, tablet computers, etc.), users have higher and higher requirements for the quality of the electronic devices. The durability of the function of the key, which is a component frequently used in electronic devices, is also an important evaluation criterion for the quality of the electronic devices. In the related art, in order to ensure the durability of the tact switch matched with the key, the switch contact end of the key guide post is generally subjected to special treatment (for example, a thermoplastic polyurethane elastomer rubber contact, i.e., a TPU contact) so as to avoid the problems that the tact switch is very easy to fail and the key is very easy to fail caused by the direct contact between the metal part of the key guide post and the tact switch. However, in the actual assembly process, the key guide post is easy to be reversely assembled, so that the metal part of the key guide post is directly contacted with the light touch switch, the light touch switch is easy to fail, and the key is easy to malfunction.
The above-mentioned contents are only for assisting understanding of the technical solution of the present application, and do not represent an admission that the above-mentioned contents are prior art.
Content of application
The application mainly aims to provide a key structure and electronic equipment applying the key structure, aiming at protecting a light touch switch matched with a key and ensuring the durability of the key function of the electronic equipment.
An embodiment of the present application provides a key structure, including:
the device comprises a shell, a positioning mechanism and a control mechanism, wherein the shell is provided with an inner side face and an outer side face which are oppositely arranged, a guide hole is arranged in the shell, and an opening of the guide hole extends to the outer side face;
the light touch switch is arranged at the bottom of the guide hole;
the key guide pillar is slidably arranged in the guide hole and positioned on one side, close to the outer side face, of the light touch switch, the key guide pillar comprises a switch contact end and a keycap contact end which are arranged oppositely, and the switch contact end is in contact with the light touch switch;
the key cap is arranged at the opening of the guide hole on the outer side surface and is in contact with the key cap contact end; and
and the fool-proof structure is arranged between the key cap and the key cap contact end and is used for preventing the reverse installation of the key guide pillar.
An embodiment of the present application further provides an electronic device, which includes a key structure, where the key structure includes:
the device comprises a shell, a positioning mechanism and a control mechanism, wherein the shell is provided with an inner side face and an outer side face which are oppositely arranged, a guide hole is arranged in the shell, and an opening of the guide hole extends to the outer side face;
the light touch switch is arranged at the bottom of the guide hole;
the key guide pillar is slidably arranged in the guide hole and positioned on one side, close to the outer side face, of the light touch switch, the key guide pillar comprises a switch contact end and a keycap contact end which are arranged oppositely, and the switch contact end is in contact with the light touch switch;
the key cap is arranged at the opening of the guide hole on the outer side surface and is in contact with the key cap contact end; and
and the fool-proof structure is arranged between the key cap and the key cap contact end and is used for preventing the reverse installation of the key guide pillar.
The technical scheme of this application, through set up between the key cap contact jaw of button key cap and button guide pillar and prevent slow-witted structure, alright utilize when the button guide pillar is correctly installed (when just adorning) and when the mistake is installed (when adorning instead), prevent that slow-witted structure can take place or can't take place the length difference of the required guiding hole that occupies of installation button guide pillar that leads to of effective cooperation, realize the effective judgement to whether the button guide pillar is installed by mistake (adorning instead), thereby can prevent effectively that the button guide pillar from adorning instead, guarantee button guide pillar and button key cap's correct installation, and then avoid the metal part of button guide pillar and the light touch switch that light touch switch direct contact leads to extremely easily become invalid, the very easily malfunctioning problem of button, can protect and button (button key cap and button guide pillar) matched with light touch switch, guarantee electronic equipment's button function's persistence.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of a key structure according to the present application;
fig. 2 is a schematic structural view of the housing in fig. 1.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Key structure | 33 | |
| 10 | |
331 | Fixing |
| 11 | Inner side surface | 333 | |
| 13 | |
40 | Key cap of |
| 15 | |
50 | Fool- |
| 17 | Dismounting hole | 51 | Fool- |
| 20 | Light touch switch | 53 | Fool-proof groove |
| 30 | |
60 | Sealing ring |
| 31 | Guide post |
70 | |
| 311 | Accommodating |
80 | |
| 313 | Mounting groove |
The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The present application provides a key structure 100, which can be applied to an electronic device, and aims to protect a tact switch 20 matched with a key, and to ensure the durability of the key function of the electronic device. It is understood that the electronic device may be, but is not limited to, a mobile phone, a tablet computer, a Personal Digital Assistant (PDA), an e-book reader, an MP3 (motion Picture Experts Group Audio Layer III) player, an MP4 (motion Picture Experts Group Audio Layer IV) player, a notebook computer, a car computer, a set-top box, a smart tv, a wearable device, a navigator, a handheld game console, etc.
The following will explain the specific structure of the key structure 100 of the present application:
as shown in fig. 1 and fig. 2, in an embodiment of the key structure 100 of the present application, the key structure 100 includes:
the shell 10 is provided with an inner side surface 11 and an outer side surface 13 which are oppositely arranged, a guide hole 15 is arranged in the shell 10, and the opening of the guide hole 15 extends to the outer side surface 13;
the tact switch 20 is arranged at the bottom of the guide hole 15;
the key guide post 30 is slidably arranged through the guide hole 15 and is positioned on one side of the light touch switch 20 close to the outer side surface, the key guide post 30 comprises a switch contact end and a keycap contact end which are oppositely arranged, and the switch contact end is in contact with the light touch switch 20;
the key cap 40 is arranged at the opening of the guide hole 15 on the outer side surface 13, and is in contact with the key cap contact end; and
and the fool-proof structure 50 is arranged between the key cap 40 and the key cap contact end and is used for preventing the key guide pillar 30 from being reversely arranged.
Specifically, the switch contact end of the key guide post 30 is used for contacting the tact switch 20, so as to protect the tact switch 20, thereby avoiding the problems that the tact switch 20 is easily disabled and the key is easily disabled due to the fact that the metal part of the key guide post 30 directly contacts the tact switch 20. On the other hand, the key cap contacting end of the key guide post 30 is used to contact the key cap 40. Thus, when the key cap 40 is pressed to move toward the inner side 11 of the housing 10, the key cap 40 can drive the key guide post 30 to move toward the inner side 11 of the housing 10 along the axial direction of the guide hole 15, and at this time, the tact switch 20 is pressed by the key guide post 30 to be triggered, thereby realizing the related key function. It is understood that the tact switch 20 can be a volume switch of the electronic device, and the related key function realized by pressing the key cap 40 is the volume increase or decrease of the electronic device; alternatively, the tact switch 20 may be a power switch of the electronic device, and the related key function realized by pressing the key cap 40 is waking or sleeping of the electronic device.
In addition, it should be noted that the guiding hole 15 includes a keycap mounting section, a guide pillar mounting section, and a switch mounting section, the keycap mounting section, the guide pillar mounting section, and the switch mounting section are sequentially arranged and sequentially communicated in a direction from the outer side 13 of the casing 10 to the inner side 11 of the casing 10, the key cap 40 is movably mounted in the keycap mounting section along the axial direction of the guiding hole 15, the key guide pillar 30 slidably penetrates the guide pillar mounting section along the axial direction of the guiding hole 15, and the tact switch 20 is fixedly mounted in the switch mounting section; at this time, a part of the key cap 40 is accommodated in the cap mounting section, and the other part protrudes from the outer side 13 of the housing 10. And, the key cap 40 can also realize the rebound after pressing by using an auxiliary structure such as an elastic member to return to the initial position. When the key cap 40 is rebounded to the initial position, the distance between the key cap 40 and the tact switch 20 is the length of the guide hole 15 that the key guide post 30 needs to occupy when being correctly installed (when being installed). At this time, when utilizing key guide pillar 30 to correctly install (when just adorning) and when the mistake installation (when reverse-mounting), fool-proof structure 50 can take place or can't take place the length difference of the guiding hole 15 that installation key guide pillar 30 that leads to needs to occupy effectively cooperate, alright realize the effective judgement whether wrong installation (dress is reversed) is to key guide pillar 30, specifically as follows:
in case one, the key guide post 30 is correctly installed (normal installation); at this time, the fool-proof structure 50 can be effectively matched, and the length of the guide hole 15 occupied for installing the key guide post 30 is consistent with the distance from the tact switch 20 when the key cap 40 rebounds to the initial position; at the moment, the key cap 40 can be normally installed to the correct position, the installation also has pressing and rebounding allowance, the key functions are normal, and the pressing hand feeling is normal;
in case two, the key guide post 30 is installed incorrectly (reversed); at this time, the fool-proof structure 50 cannot be effectively matched, and the length of the guide hole 15 occupied for installing the key guide post 30 is greater than the distance from the tact switch 20 when the key cap 40 rebounds to the initial position; at this time, the key cap 40 cannot be normally mounted to the correct position; or even if the key cap 40 can be normally installed at the correct position, the installed key cap 40 does not have the pressing and rebounding allowance any more, the key functions are abnormal, and the pressing hand feeling is abnormal;
so, alright effectively differentiate whether the button guide pillar 30 is installed by mistake (dress is anti-reverse), thereby effectively stop the condition that button guide pillar 30 is installed by mistake (dress is anti-reverse), help assembly process correctly goes on, realize the correct installation of button guide pillar 30 and button cap 40, and then avoid the metal part direct contact of button guide pillar 30 to dabble switch 20 that leads to and dabble switch 20 extremely easily became invalid, the button extremely easily malfunctioning problem, protected promptly with the button (button cap 40 and button guide pillar 30) matched with dabble switch 20, the persistence of electronic equipment's button function has been ensured.
That is, in the technical scheme of the present application, by providing the fool-proof structure 50 between the key cap 40 and the key cap contact end of the key guide post 30, the fool-proof structure 50 can utilize the difference in length of the guide hole 15 required to be occupied by the key guide post 30 when the key guide post 30 is correctly installed (when the key guide post is installed normally) and when the key guide post is installed incorrectly (when the key guide post is installed reversely), which is caused by the fact that the fool-proof structure 50 can or cannot be effectively matched, to realize the effective judgment of whether the key guide post 30 is incorrectly installed (installed reversely, thereby effectively preventing the key guide post 30 from being reversely arranged, ensuring the correct installation of the key guide post 30 and the key cap 40, thereby avoiding the problems that the light touch switch 20 is easy to lose efficacy and the key is easy to malfunction caused by the direct contact between the metal part of the key guide post 30 and the light touch switch 20, the tact switch 20 matched with the key (the key cap 40 and the key guide post 30) can be protected, and the durability of the key function of the electronic equipment is guaranteed.
It should be noted that the fool-proof structure 50 may be a structure of two curved surfaces that can be completely attached, besides a structure of inserting and matching a groove and a protrusion, and two curved surfaces are completely attached when the key guide pillar 30 is installed positively so that the key cap 40 can be correctly installed, and when the key guide pillar 30 is installed reversely, the curved surface on the key cap 40 cannot be attached to the curved surface on the key guide pillar 30 so that the key cap 40 is jacked up and cannot be correctly installed, thereby realizing effective determination of whether the key guide pillar 30 is installed incorrectly (installed reversely). Of course, the fool-proof structure 50 may also be other reasonable and effective structural forms as long as the length of the guide hole 15 occupied by the key guide post 30 during forward installation and reverse installation is different, for example, the structural form in which two steps are overlapped with each other is satisfied, and the rest of the structural forms are not described in detail herein.
Further, the key structure 100 further includes a sealing ring 60, wherein the sealing ring 60 is sealed between an outer side wall of the key guide post 30 and an inner side wall of the guide hole 15. Because the sealing ring 60 always collides against the outer side wall of the key guide post 30 and the inner side wall of the guide hole 15, water flow is difficult to permeate into the casing 10 through the guide hole 15, so that the key structure 100 has good waterproof performance, and the reliability and the service life of the electronic device are improved. On the other hand, in order to ensure that the sealing ring 60 can be well sealed between the outer side wall of the key guide post 30 and the inner side wall of the guide hole 15, i.e. to ensure that the sealing ring 60 is always pressed between the outer side wall of the key guide post 30 and the inner side wall of the guide hole 15, the sealing ring 60 and the outer side wall of the key guide post 30 are in interference fit, and the sealing ring 60 and the inner side wall of the guide hole 15 are in interference fit. At this time, the sealing ring 60 generates a resilient force toward the outer sidewall of the key guide post 30 and a resilient force toward the inner sidewall of the guide hole 15 after being pressed, thereby achieving tight sealing. On the other hand, the outer sidewall of the key guide post 30 and/or the inner sidewall of the guide hole 15 are further provided with a receiving groove 311 for receiving the seal ring 60. The sealing ring 60 is limited in the accommodating groove 311, so that the stability of the sealing ring 60 is enhanced, the sealing performance of the sealing ring 60 on the key structure 100 is improved, and the waterproof reliability of the key structure 100 is improved. It is to be understood that the seal ring 60 may be made of an elastic material such as silicone rubber, etc. In addition, the inner side surface 11 of the casing 10 is further provided with a dismounting hole 17 communicated with the guide hole 15, and the diameter of an inscribed circle of the cross section of the dismounting hole is smaller than the diameter of an circumscribed circle of the cross section of the key guide post 30, so that the dismounting hole can be used for dismounting the key guide post 30.
Of course, it is understood that the key structure 100 may further include a flexible circuit board 70 and a reinforcing plate 80, and the flexible circuit board 70 and the reinforcing plate 80 may be sequentially disposed on a side of the tact switch 20 away from the outer side 13 of the casing 10 according to a direction from the outer side 13 of the casing 10 to the inner side 11 of the casing 10, for carrying the tact switch 20 and achieving electrical connection between the tact switch 20 and the electronic device circuit portion. That is, the flexible circuit board 70 is electrically connected to a main board of the electronic device, and the instruction sent by the tact switch 20 is sent to the main board, so as to trigger the related key function. In addition, the housing 10 of the key structure 100 may be formed as an integral structure with the housing of the electronic device (e.g., integrally injection molded), or may be formed as two separate parts with the housing of the electronic device, and assembled together by assembling after being formed separately.
As shown in fig. 1, the fool-proof structure 50 may be specifically configured as follows:
the fool-proof structure 50 is a fool-proof protrusion 51 and a fool-proof groove 53 matched with the fool-proof protrusion 51, the fool-proof protrusion 51 is arranged on the surface of the key cap contact end contacting the key cap 40, the fool-proof groove 53 is arranged on the surface of the key cap 40 contacting the key cap contact end, and the fool-proof protrusion 51 is inserted into the fool-proof groove 53;
the diameter of an inscribed circle of the cross section of the fool-proof groove 53 is smaller than the diameter of an circumscribed circle of the cross section of the switch contact end.
Specifically, the cross-sectional shape of the fool-proof groove 53 may be circular, square, rectangular, triangular, rhombic, parallelogram, etc., and the cross-sectional shape of the fool-proof protrusion 51 may be correspondingly circular, square, rectangular, triangular, rhombic, parallelogram, etc. The cross-sectional size of the fool-proof groove 53 may be comparable to the size of the fool-proof protrusion 51, or slightly larger than the fool-proof protrusion 51.
So, only when key guide pillar 30 installation direction is correct, switch 20 is dabbed according to key guide pillar 30's switch contact jaw orientation promptly, key cap contact jaw orientation key cap 40's mode is installed of key guide pillar 30, prevent that slow-witted arch 51 can insert in preventing slow-witted recess 53, at this moment, the length of the guiding hole 15 that installation key guide pillar 30 needs occupy is unanimous with the distance that switch 20 was dabbed when key cap 40 kick-backs to initial position, key cap 40 can normally be installed to the correct position, also have the surplus of pressing and kick-backing after the installation, the key function is normal, press and feel normal. That is, the correct installation of the key guide post 30 and the key cap 40 is realized, the problems that the tact switch 20 is easily disabled and the key is easily out of order due to the fact that the metal part of the key guide post 30 directly contacts the tact switch 20 are avoided, the tact switch 20 matched with the key (the key cap 40 and the key guide post 30) is further protected, and the durability of the key function of the electronic device is guaranteed. Moreover, the fool-proof structure 50 also has the advantages of simple structure, low processing cost, high processing efficiency and the like.
In addition, in the specific implementation process, the cross-sectional shapes of the fool-proof groove 53 and the fool-proof protrusion 51 can be selected to be circular, and at this time, the axial line of the fool-proof groove 53 and the axial line of the fool-proof protrusion 51 can be arranged coaxially with the axial line of the key guide post 30. Like this, button guide pillar 30 is assembling the in-process, all can accomplish correct installation (just adorning) when its circumferential direction reaches arbitrary angle, makes in fool-proof protrusion 51 inserts fool-proof recess 53, can make button guide pillar 30's the dress more convenient, and then can effectively promote and join in marriage dress efficiency and assembly convenience.
Further, in order to improve the reliability of the fool-proof structure 50, the stability and reliability of the three-way cooperation of the key cap 40, the key guide post 30 and the tact switch 20 are ensured, the depth of the fool-proof groove 53 and the height of the fool-proof protrusion 51 can be set as follows, as shown in fig. 1:
defining the difference between the depth of the fool-proof groove 53 and the height of the fool-proof protrusion 51 as D, the condition is satisfied: d is more than or equal to 0.2 mm. That is, the difference D between the depth of the fool-proof groove 53 and the height of the fool-proof protrusion 51 should not be too small: the fool-proof groove 53 is provided to accommodate the entire fool-proof protrusion 51, and therefore, the influence of errors during processing needs to be considered. The fool-proof protrusion 51 is generally machined by a lathe, the tolerance of the lathe machining is generally +/-0.05 mm, the fool-proof groove 53 is generally machined by a milling machine, and the tolerance of the milling machine machining is generally +/-0.05 mm, so that in order to ensure that the fool-proof protrusion 51 can be completely inserted into the fool-proof groove 53, the difference D between the depth of the fool-proof groove 53 and the height of the fool-proof protrusion 51 is at least 0.2 mm; at this moment, the difference between the depth of the fool-proof groove 53 and the height of the fool-proof protrusion 51 is enough to ensure that the fool-proof protrusion 51 can be completely inserted into the fool-proof groove 53 under the tolerance, so that the contact between the key guide post 30 and the key cap 40 and the tact switch 20 is good, but not excessively supported and separated, so that the key (the key cap 40 and the case guide post) has good press-return performance, and further the sliding stability of the key guide post 30 and the triggering accuracy of the tact switch 20 are ensured. It is understood that, in practical applications, the difference D between the depth of the fool-proof groove 53 and the height of the fool-proof protrusion 51 can be selected to be 0.2mm, 0.3mm, 0.4mm, 0.5mm, etc.
Furthermore, in order to improve the stability and reliability of the cooperation between the fool-proof protrusion 51 and the fool-proof groove 53, and ensure the stability and reliability of the cooperation between the key cap 40, the key guide post 30 and the tact switch 20, the following arrangement can be made between the diameter of the inscribed circle of the cross section of the fool-proof groove 53 and the diameter of the circumscribed circle of the cross section of the fool-proof protrusion 51, as shown in fig. 1:
defining the difference E between the diameter of the inscribed circle of the cross section of the fool-proof groove 53 and the diameter of the circumscribed circle of the cross section of the fool-proof protrusion 51, satisfying the condition: e is more than or equal to 0.2 mm. That is, the difference E between the inscribed circle diameter of the cross section of the fool-proof groove 53 and the circumscribed circle diameter of the cross section of the fool-proof protrusion 51 should not be excessively small: the fool-proof groove 53 is provided to accommodate the entire fool-proof protrusion 51, and therefore, the influence of errors during processing needs to be considered. The fool-proof protrusion 51 is generally machined by a lathe, the tolerance of the lathe machining is generally +/-0.05 mm, the fool-proof groove 53 is generally machined by a milling machine, and the tolerance of the milling machine is generally +/-0.05 mm, so that in order to ensure that the fool-proof protrusion 51 can be smoothly inserted into the fool-proof groove 53 without friction, the difference between the diameter of an inscribed circle of the cross section of the fool-proof groove 53 and the diameter of an circumscribed circle of the cross section of the fool-proof protrusion 51 is at least 0.2 mm; at this time, the difference between the diameter of the inscribed circle of the cross section of the fool-proof groove 53 and the diameter of the circumscribed circle of the cross section of the fool-proof protrusion 51 is enough to ensure that the contact between the key guide post 30 and the key cap 40 and the touch switch 20 is good, but not too tightly supported and too not too separated, and is also enough to ensure that the keys (the key cap 40 and the case guide post) have good press recovery performance, thereby ensuring the sliding stability of the key guide post 30 and the triggering accuracy of the touch switch 20. It is understood that, in practical applications, the difference E between the diameter of the inscribed circle of the cross section of the fool-proof groove 53 and the diameter of the circumscribed circle of the cross section of the fool-proof protrusion 51 can be selected to be 0.2mm, 0.3mm, 0.4mm, 0.5mm, etc.
As shown in fig. 1, the key guide post 30 may be provided in the following form,
the key guide post 30 includes:
a guide post main body 31, one end of the guide post main body 31 is contacted with the key cap 40;
the contact 33 is arranged at one end of the guide pillar main body 31, which is far away from the key cap 40, and is in contact with the tact switch 20;
one end of the guide pillar main body 31, which is in contact with the key cap 40, forms a key cap contact end;
the end of the contact 33 facing away from the key cap 40 constitutes the switch contact end.
Specifically, the guide post body 31 is substantially cylindrical, and is slidably inserted through the guide hole 15 in the axial direction of the guide hole 15. One end of the guide pillar main body 31 is in contact with the key top 40, and the other end is disposed toward the tact switch 20. The end surface of one end of the guide pillar main body 31 contacting the key cap 40 (i.e. the key cap contacting end of the key guide pillar 30) is provided with a fool-proof protrusion 51, the surface of the key cap 40 facing the guide pillar main body 31 is provided with a fool-proof groove 53, and the fool-proof protrusion 51 is inserted into the fool-proof groove 53. Meanwhile, a contact 33 is provided at one end of the guide post body 31 facing the tact switch 20, and the guide post body 31 is in contact with the tact switch 20 through the contact 33. Further, the contact 33 is generally made of thermoplastic polyurethane elastomer rubber (TPU), and the hardness of the contact is lower than that of the guide post main body 31 (generally made of steel), so that the problems that the tact switch 20 is easily disabled and the key is easily disabled due to the fact that the metal part of the key guide post 30 is directly contacted with the tact switch 20 can be solved, the tact switch 20 is protected, the service life of the tact switch 20 is prolonged, and the durability of the key function is guaranteed.
Further, in order to improve the stability of the assembly of the contact 33 with the guide post body 31 and the accuracy of the key guide post 30 triggering the tact switch 20, the contact 33 may specifically adopt the following structural form, as shown in fig. 1:
an installation groove 313 is formed in one end, away from the key cap 40, of the guide post main body 31; the contact 33 includes a fixing portion 331 and a contact portion 333 (i.e., a switch contact end of the key guide post 30) connected to each other, the fixing portion 331 is installed in the mounting groove 313, and the contact portion 333 is disposed outside the mounting groove 313 and contacts the tact switch 20. Specifically, the contact portion 333 is substantially circular truncated cone-shaped, and the fixing portion 331 is also substantially circular truncated cone-shaped. The contact part 333 is coaxially arranged with the fixing part 331, the circumscribed circle diameter of the cross section of the fixing part 331 is smaller than the circumscribed circle diameter of the cross section of the contact part 333, the fixing part 331 is fixed in the mounting groove 313 in a dispensing manner, and the contact part 333 is exposed out of the mounting groove 313 and is used for contacting with the tact switch 20. Of course, it can be understood that, in other embodiments, the contact 33 may also be circular truncated cone-shaped and directly fixed to an end surface of the guide pillar main body 31, which is away from the key cap 40, and specifically, the fixing may be realized by selecting a snap connection, an adhesive connection, a welding mode, and the like.
Further, in order to avoid the failure of the fool-proof structure 50 and ensure the fool-proof function of the fool-proof structure 50, the diameter of the circumscribed circle of the cross section of the contact portion 333 of the contact 33 and the diameter of the inscribed circle of the cross section of the fool-proof groove 53 may be set as follows, as shown in fig. 1:
if the difference between the circumscribed circle diameter of the cross section of the contact portion 333 and the inscribed circle diameter of the cross section of the fool-proof groove 53 is defined as F, the condition is satisfied: f is more than or equal to 0.2 mm. That is, the difference F between the circumscribed circle diameter of the cross section of the contact part 333 and the inscribed circle diameter of the cross section of the fool-proof groove 53 should not be too small: the main fool-proof approach is that the contact 33 cannot be inserted into the fool-proof groove 53 when the key guide post 30 is reversely installed, so that the key cap 40 is ejected, and at this time, the key cap 40 cannot be normally installed to the correct position; or even if the key cap 40 can be normally installed at the correct position, the installed key cap 40 does not have the pressing and rebounding allowance any more, the key functions are abnormal, and the pressing hand feeling is abnormal; thus, the installation is checked and the installation is carried out for the second time. Therefore, the circumscribed circle diameter of the cross section of the contact portion 333 of the contact 33 needs to be larger than the inscribed circle diameter of the cross section of the fool-proof groove 53, and, in consideration of the influence of processing errors: the machining tolerance of the foolproof groove 53 is +/-0.05 mm, and the injection molding tolerance of the contact part 333 is +/-0.05 mm; therefore, the difference F between the circumscribed circle diameter of the cross section of the contact part 333 and the inscribed circle diameter of the cross section of the fool-proof groove 53 is at least 0.2 mm. It is understood that, in practical applications, the difference F between the circumscribed circle diameter of the cross-section of the contact part 333 and the inscribed circle diameter of the cross-section of the fool-proof groove 53 may be selected to be 0.2mm, 0.3mm, 0.4mm, 0.5mm, etc.
Of course, it is understood that in other embodiments, the fool-proof structure 50 may also be configured as follows:
the fool-proof structure 50 is a fool-proof protrusion 51 and a fool-proof groove 53 matched with the fool-proof protrusion 51, the fool-proof groove 53 is arranged on the surface of the key cap contact end contacting the key cap 40, the fool-proof protrusion 51 is arranged on the surface of the key cap 40 contacting the key cap contact end, and the fool-proof protrusion 51 is inserted into the fool-proof groove 53.
Specifically, the cross-sectional shape of the fool-proof groove 53 may be circular, square, rectangular, triangular, rhombic, parallelogram, etc., and the cross-sectional shape of the fool-proof protrusion 51 may be correspondingly circular, square, rectangular, triangular, rhombic, parallelogram, etc. The cross-sectional size of the fool-proof groove 53 may be comparable to the size of the fool-proof protrusion 51, or slightly larger than the fool-proof protrusion 51.
So, only when key guide pillar 30 installation direction is correct, switch 20 is dabbed according to key guide pillar 30's switch contact jaw orientation promptly, key cap contact jaw orientation key cap 40's mode is installed of key guide pillar 30, prevent that slow-witted arch 51 can insert in preventing slow-witted recess 53, at this moment, the length of the guiding hole 15 that installation key guide pillar 30 needs occupy is unanimous with the distance that switch 20 was dabbed when key cap 40 kick-backs to initial position, key cap 40 can normally be installed to the correct position, also have the surplus of pressing and kick-backing after the installation, the key function is normal, press and feel normal. That is, the correct installation of the key guide post 30 and the key cap 40 is realized, the problems that the tact switch 20 is easily disabled and the key is easily out of order due to the fact that the metal part of the key guide post 30 directly contacts the tact switch 20 are avoided, the tact switch 20 matched with the key (the key cap 40 and the key guide post 30) is further protected, and the durability of the key function of the electronic device is guaranteed. Moreover, the fool-proof structure 50 also has the advantages of simple structure, low processing cost, high processing efficiency and the like.
In addition, in the specific implementation process, the cross-sectional shapes of the fool-proof groove 53 and the fool-proof protrusion 51 can be selected to be circular, and at this time, the axial line of the fool-proof groove 53 and the axial line of the fool-proof protrusion 51 can be arranged coaxially with the axial line of the key guide post 30. Like this, button guide pillar 30 is assembling the in-process, all can accomplish correct installation (just adorning) when its circumferential direction reaches arbitrary angle, makes in fool-proof protrusion 51 inserts fool-proof recess 53, can make button guide pillar 30's the dress more convenient, and then can effectively promote and join in marriage dress efficiency and assembly convenience.
Further, in order to improve the reliability of the fool-proof structure 50, the stability and reliability of the three-way cooperation of the key cap 40, the key guide post 30 and the tact switch 20 are ensured, the depth of the fool-proof groove 53 and the height of the fool-proof protrusion 51 can be set as follows:
defining the difference between the depth of the fool-proof groove 53 and the height of the fool-proof protrusion 51 as D, the condition is satisfied: d is more than or equal to 0.2 mm. That is, the difference D between the depth of the fool-proof groove 53 and the height of the fool-proof protrusion 51 should not be too small: the fool-proof groove 53 is provided to accommodate the entire fool-proof protrusion 51, and therefore, the influence of errors during processing needs to be considered. The fool-proof protrusion 51 is generally machined by a lathe, the tolerance of the lathe machining is generally +/-0.05 mm, the fool-proof groove 53 is generally machined by a milling machine, and the tolerance of the milling machine machining is generally +/-0.05 mm, so that in order to ensure that the fool-proof protrusion 51 can be completely inserted into the fool-proof groove 53, the difference D between the depth of the fool-proof groove 53 and the height of the fool-proof protrusion 51 is at least 0.2 mm; at this moment, the difference between the depth of the fool-proof groove 53 and the height of the fool-proof protrusion 51 is enough to ensure that the fool-proof protrusion 51 can be completely inserted into the fool-proof groove 53 under the tolerance, so that the contact between the key guide post 30 and the key cap 40 and the tact switch 20 is good, but not excessively supported and separated, so that the key (the key cap 40 and the case guide post) has good press-return performance, and further the sliding stability of the key guide post 30 and the triggering accuracy of the tact switch 20 are ensured. It is understood that, in practical applications, the difference D between the depth of the fool-proof groove 53 and the height of the fool-proof protrusion 51 can be selected to be 0.2mm, 0.3mm, 0.4mm, 0.5mm, etc.
In addition, it should be noted that the specific arrangement between the inscribed circle diameter of the cross section of the fool-proof groove 53 and the circumscribed circle diameter of the cross section of the fool-proof protrusion 51, the specific arrangement of the key guide post 30, and the specific arrangement of the contact 33 can be designed similarly with reference to the previous embodiment, and are not described in detail herein.
The present application also proposes an electronic device, which includes the key structure 100 as described above, and the specific structure of the key structure 100 is detailed in the foregoing embodiments. Since the electronic device adopts all the technical solutions of all the embodiments, at least all the beneficial effects brought by all the technical solutions of all the embodiments are achieved, and no further description is given here.
The above description is only an alternative embodiment of the present application, and not intended to limit the scope of the present application, and all modifications and equivalents of the technical solutions that can be directly or indirectly applied to other related fields without departing from the spirit of the present application are intended to be included in the scope of the present application.
Claims (7)
1. A key structure, comprising:
the device comprises a shell, a positioning mechanism and a control mechanism, wherein the shell is provided with an inner side face and an outer side face which are oppositely arranged, a guide hole is arranged in the shell, and an opening of the guide hole extends to the outer side face;
the light touch switch is arranged at the bottom of the guide hole;
the key guide pillar is slidably arranged in the guide hole and positioned on one side, close to the outer side face, of the light touch switch, the key guide pillar comprises a switch contact end and a keycap contact end which are arranged oppositely, and the switch contact end is in contact with the light touch switch;
the key cap is arranged at the opening of the guide hole on the outer side surface and is in contact with the key cap contact end; and
the fool-proof structure is arranged between the key cap and the key cap contact end and is used for preventing the reverse installation of the key guide pillar;
the foolproof structure comprises a foolproof protrusion and a foolproof groove matched with the foolproof protrusion, the surface of the key cap contact end, which is in contact with the key cap, is provided with the foolproof protrusion, the surface of the key cap, which is in contact with the key cap contact end, is provided with the foolproof groove, and the foolproof protrusion is inserted into the foolproof groove;
the diameter of an inscribed circle of the cross section of the fool-proof groove is smaller than the diameter of an circumscribed circle of the cross section of the switch contact end.
2. The key structure of claim 1, wherein if the difference between the depth of the fool-proof groove and the height of the fool-proof protrusion is defined as D, the condition is satisfied: d is more than or equal to 0.2 mm.
3. The key structure of claim 1, wherein a difference between a diameter of an inscribed circle defining a cross section of the fool-proof groove and a diameter of an circumscribed circle defining a cross section of the fool-proof protrusion is E, a condition is satisfied: e is more than or equal to 0.2 mm.
4. The key structure according to any one of claims 1 to 3, wherein the key guide post comprises:
the guide post main body is provided with one end which is contacted with the key cap of the key;
the contact is arranged at one end of the guide pillar main body, which is far away from the key cap of the key, and is contacted with the light touch switch;
one end of the guide pillar main body, which is contacted with the key cap of the key, forms a key cap contact end;
and one end of the contact, which is far away from the key cap, forms the switch contact end.
5. The key structure of claim 4, wherein an end of the guide post body facing away from the key cap is provided with a mounting groove; the contact comprises a fixing part and a contact part which are connected, the fixing part is installed in the installation groove, and the contact part is arranged outside the installation groove and is in contact with the tact switch.
6. The key structure of claim 5, wherein if a difference between a circumscribed circle diameter of a cross section of the contact portion and an inscribed circle diameter of a cross section of the fool-proof groove is defined as F, a condition is satisfied: f is more than or equal to 0.2 mm.
7. An electronic device, characterized in that it comprises a key structure according to any one of claims 1 to 6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910699349.1A CN110444424B (en) | 2019-07-30 | 2019-07-30 | Key structure and electronic equipment |
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| CN201910699349.1A CN110444424B (en) | 2019-07-30 | 2019-07-30 | Key structure and electronic equipment |
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| CN110444424A CN110444424A (en) | 2019-11-12 |
| CN110444424B true CN110444424B (en) | 2021-04-09 |
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| CN111031728B (en) * | 2019-12-26 | 2021-04-20 | Oppo广东移动通信有限公司 | Electronic device, assembling method and disassembling method |
| CN111370244B (en) * | 2020-03-02 | 2022-04-12 | Oppo广东移动通信有限公司 | Key structure and electronic equipment |
| CN112490044A (en) * | 2020-11-25 | 2021-03-12 | Oppo（重庆）智能科技有限公司 | Key assembly and electronic equipment |
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| CN201036182Y (en) * | 2007-04-25 | 2008-03-12 | 东莞市凯华电子有限公司 | Switch with lamp |
| CN201323143Y (en) * | 2008-11-03 | 2009-10-07 | 富士康(昆山)电脑接插件有限公司 | Switch |
| TW201030789A (en) * | 2009-02-09 | 2010-08-16 | Solteam Electronics Co Ltd | Drawing rotating filter device |
| CN201514874U (en) * | 2009-09-22 | 2010-06-23 | 尚圃股份有限公司 | Button switch with lamp |
| CN202189706U (en) * | 2011-07-04 | 2012-04-11 | 延锋伟世通汽车电子有限公司 | Automobile sound system panel button structure |
| CN202178184U (en) * | 2011-07-21 | 2012-03-28 | 华天国际企业有限公司 | Multipurpose button switch |
| CN202275756U (en) * | 2011-10-18 | 2012-06-13 | 上海江森自控汽车电子有限公司 | Novel combined key |
| CN103280362B (en) * | 2013-05-21 | 2015-07-29 | 苏州华之杰电讯有限公司 | A kind of Fool-proof trigger switch |
| CN203503494U (en) * | 2013-10-31 | 2014-03-26 | 德力西电气有限公司 | Rotary-type sudden stopping button switch |
| CN204390946U (en) * | 2015-02-27 | 2015-06-10 | 浙江大华技术股份有限公司 | A kind of button and electric equipment |
| CN204857501U (en) * | 2015-06-30 | 2015-12-09 | 明瀚科技(苏州)有限公司 | Prevent that slow -witted nature high temperature resistance dabs switch |
| CN206301721U (en) * | 2016-12-16 | 2017-07-04 | 深圳市巨烽显示科技有限公司 | For the rotation button of control panel |
| CN206789459U (en) * | 2017-04-28 | 2017-12-22 | 维沃移动通信有限公司 | A kind of button assembling assembly and electronic equipment |
| CN207651384U (en) * | 2017-10-27 | 2018-07-24 | 天津思步科技有限公司 | A kind of keystroke fixing structure for rocker actuator |
| CN208637349U (en) * | 2018-07-07 | 2019-03-22 | 国威科技有限公司 | A kind of outdoor luggage compartment unlatching switch |
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