A kind of key switch
Technical field
The utility model relates to switching technique fields, and in particular to a kind of key switch with stroke defencive function.
Background technique
Switch is the on-off control unit in circuit, is played a very important role to the realization of circuit function.There is one kind
Key switch need to be pressed and Continued depression could continue closing or opening, and existing key switch generally uses button by one
A spring is arranged on the shell of switch, and contact chip is fixed on button, and button press contact chip realizes the electricity between terminal
Property connects or disconnects.Pressing course button all touching switch shells, hard collision easily lead to switch damage to this switch every time
It is bad, if frequency of use is also relatively high, it is easy to hit damage using existing key switching structure, influences the adaptation longevity of switch
Life.Such as keyboard button is a kind of key switch, Continued depression can just make circuit be continuously turned on, and frequency of use
Height, button, which is easy impact switch substructure, during pressing causes to damage.
Utility model content
The technical issues of the utility model solves is to provide a kind of soluble key for the deficiency in background technique
Switch.
In order to solve the above technical problems, the technical solution of the utility model is: a kind of key switch, including shell, on-off
Control assembly and at least two terminals, each terminal are fixed on shell;The on-off control assembly includes handle, cunning
Block and contact chip, the handle are resiliently arranged on shell, and the sliding block is resiliently arranged on handle, and the contact chip fixation is set
It sets on sliding block;Can be by the electrical communication between contact chip and each termination contact realization terminal by pressing pressuring press handle, or will connect
Contact separates electrically disconnecting between realizing terminal with each terminal.
Further, slideway is provided on the handle, the sliding block is slidably arranged in slideway, the slideway sliding side
Both ends are provided with position limiting structure.
Further, the position limiting structure is the barrier structure that slideway one end is arranged in and the lid that the slideway other end is arranged in
Plate is connected with the first spring between the cover board and sliding block.
Further, the cover board is fixed on slideway one end by buckle structure.
Further, elastic piece structure is provided on the contact chip.
Further, be provided with contact on the terminal, the section of the contact and contact chip contact surface be triangle or
Semicircular arc.
It further, further include vocal structure, the vocal structure includes the bullet block of lateral elasticity setting, the handle side
To protrusion is provided with, the handle pressing or the process protrusions of bouncing can be contacted with bullet block.
Further, the bullet block is hoodle, and the hoodle is resiliently arranged on shell by second spring.
Further, the shell includes pedestal and upper casing, and the upper casing and pedestal are clamped.
Further, the base bottom is additionally provided with drainage hole.
Beneficial effect of the utility model mainly has the following: since handle is resiliently arranged on shell, sliding block
It is resiliently arranged on handle, contact chip is fixed on sliding block, therefore when starting by pressuring press handle, and elasticity occurs between handle and shell
Compression, up to electrically conducting between contact chip and each termination contact, realization terminal;If continued by pressuring press handle, handle and cunning
Start elastic compression between block to bear the pressure from handle, sliding block and contact chip be not pressurised power and terminal hard squeeze or
Collision avoids the constructions of switch such as sliding block and contact chip and damages because of the extrusion and collision excessively generated by pressuring press handle, can extend
The service life of switch, the switch that the pressing dynamics such as button switch especially suitable for keyboard are big, frequency is high.
Detailed description of the invention
Fig. 1 is the schematic perspective view of key switch in the utility model embodiment one;
Fig. 2 is the schematic diagram of the section structure in Fig. 1 at A-A;
Fig. 3 is the schematic diagram of the section structure in Fig. 1 at B-B;
Fig. 4 is the configuration schematic diagram of key switch in the utility model embodiment one;
Fig. 5 is the configuration schematic diagram of the on-off control assembly of key switch in the utility model embodiment one;
Fig. 6 is the configuration schematic diagram of the vocal structure of key switch in the utility model embodiment one;
Fig. 7 is the configuration schematic diagram that the contact chip of key switch in the utility model embodiment one is connect with terminal;
Fig. 8 is the schematic diagram of the section structure that the contact chip of key switch in the utility model embodiment one is connect with terminal;
Fig. 9 is the structural schematic diagram of the contact chip of key switch in the utility model embodiment one.
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent;In order to better illustrate this embodiment, attached
Scheme certain components to have omission, zoom in or out, does not represent the size of actual product;To those skilled in the art,
The omitting of some known structures and their instructions in the attached drawings are understandable;The same or similar label corresponds to same or similar
Component;The terms describing the positional relationship in the drawings are only for illustration, should not be understood as the limitation to this patent.
Specific embodiment
In order to facilitate the understanding of those skilled in the art, below in conjunction with attached drawing and embodiment to the utility model carry out into
One step detailed description.
Embodiment one
Refering to fig. 1 ~ 9, a kind of key switch, including shell 1, on-off control assembly 3 and at least two terminals 2, shell 1 are made
For the support mounting structure of switch, shell 1 can be set to the structure of 11 split of upper casing 12 and pedestal.Each terminal 2 is fixed
It is arranged on shell 1, can be clamped or be spirally connected and fix on the pedestal 11.On-off control assembly 3 is also mounted on shell 1, can be with
It is movably arranged on upper casing 12.The on-off control assembly 3 controls the connection or disconnection between each terminal 2, realizes switch function
Energy.
Refering to Fig. 4, the on-off control assembly 3 includes handle 31, sliding block 32 and contact chip 33, and 31 elasticity of handle is set
It sets on shell 1, can be by elastic slice or spring installation settings, such as shown in Fig. 4 using third spring 13 come elastic peace
The mode of dress, the guide post that installation spring is provided on shell 1 and handle 31 is oriented to, so that handle 31 can be along guide post elasticity
Sliding.The sliding block 32 is resiliently arranged on handle 31, can be connected using the common elastic set-up mode such as elastic slice, spring.
The contact chip 33 is fixed on sliding block 32, can using riveting, the modes such as be clamped or be spirally connected and connect.Above-mentioned terminal 2
It is metallic conductor with contact chip 33, handle 31, sliding block 32 and shell use insulating materials.
Refering to fig. 1 ~ 9, the switch of the present embodiment can be set to normal open switch, i.e. contact chip 33 and each end under natural conditions
Son is always maintained at off-state, and contact chip 33 and each termination contact can be realized that the electrical property between each terminal 2 connects by pressuring press handle 31
It is logical;It may be set to be normally closed switch, i.e., contact chip 33 and each terminal are always maintained at closed state, pressuring press handle under natural conditions
31 can separate contact chip 33 with each terminal electrically disconnecting between realizing terminal.In addition, switch can be set to pressing one
The mode that original on off operating mode is remained open or is closed can be changed down;May be set to be the continuous pressing of needs could change
On off operating mode originally, the mode for remaining open or being closed.It is normal open switch shown in Fig. 1 ~ 9 of the present embodiment, setting two
A terminal, and be the mode that continuous pressing could change original on off operating mode, when switching work, by pressuring press handle 31, contact
Piece 33 pushes therewith to electrically conduct with the realization of two termination contacts, and pressing, which may be implemented, is once connected, and Continued depression can be with
Realization is continuously turned on.Since handle 31 is resiliently arranged on shell, sliding block 32 is resiliently arranged on handle 31, and contact chip is fixed on
On sliding block 32, therefore when starting by pressuring press handle 31, elastic compression occurs between handle 31 and shell, until contact chip and each end
Son contacts, electrically conducting between realization terminal;If continuing to start elastic compression between handle 31 and sliding block 32 by pressuring press handle 31
The pressure from handle 31 is born, sliding block 32 and contact chip be not pressurised power and terminal hard squeeze or collision, avoid cunning
The constructions of switch such as block 32 and contact chip can extend the service life of switch because pressing causes extrusion and collision to damage, particularly suitable
The switch big in pressing dynamics such as keyboard pushbuttons, frequency is high.
Refering to Fig. 5, the sliding block 32 of the present embodiment uses tubular structure, internal cavity be used to install the first spring 313 or
Other elastic components.Slideway 311 is provided on the handle 31, the sliding block 32 is slidably arranged in slideway 311.It can be by sliding block
32 are set as other tubular structures outside cylinder, slideway 311 be set as with the consistent cavity body structure of 32 shape of sliding block so that sliding block
32 can in slideway 311 linear slide;Guide pad can also be set on the outside of sliding block 32, be arranged on the inside of handle 31 corresponding
Guide rail, it is also possible that sliding block 32 can in slideway 311 linear slide.
Refering to Fig. 5, the 311 glide direction both ends of slideway are provided with position limiting structure, and sliding block 32 is avoided to be detached from slideway 311.
The position limiting structure can be set to 311 one end of slideway barrier structure and the cover board 312 of 311 other end of slideway is set,
First spring 313 is connected between cover board 312 and sliding block 32.Barrier structure can be integrally formed with slideway 311, cover board
312 can use the modes such as be spirally connected, be clamped to connect with slideway 311, and preferably with the mode of clamping, the cover board 312 passes through card
Buckle structure is fixed on 311 one end of slideway, so that the installation of the first spring mounting rear cover plate 312 is more convenient.
Refering to Fig. 9, in order to enable contact of the contact chip with terminal is relatively reliable, elastic slice knot is provided on the contact chip 33
Elastic slice can be individually fixedly installed in structure 331 on contact chip 33, preferably open slot 332 on contact chip 33, outside through slot 332
The contact chip 33 of side can have certain elasticity, can be used as elastic piece structure, more square using this structure fabrication elastic piece structure
Just.Scheme as a further preference is provided with contact 21, the contact 21 and 33 contact surface of contact chip on the terminal 2
Section is set as the small structure of the contacts area such as triangle, semicircular arc, so that when contact chip is connect with terminal, contact surface
On pressure it is bigger, contact it is just more reliable.
It further include vocal structure 4 refering to Fig. 4 and Fig. 6, vocal structure 4 can produce sound when being mainly used as by pressuring press handle,
It can be switched and whether be pressed in place by voice recognition, auditory stimulation, such as the button switch of keyboard can also be brought to operator
Just there are these demands.The vocal structure 4 includes the bullet block 41 of lateral elasticity setting, and the handle 31 is laterally disposed protrusion
314, it the handle 31 pressing or bounces process protrusions 314 and can be contacted with bullet block 41, to be pressed in handle 31 or upwards
In springback process, bullet block 41 can cross protrusion 314 and collide sounding with 31 side wall of handle, realize vocal function.The bullet block 41
It can directly be resiliently arranged on pedestal 11, be arranged in tube-in-tube structure 43 preferably by second spring 42, by tube-in-tube structure 43
On the pedestal 11, such vocal structure 4 can independently make, and avoid 11 structure too complex of pedestal for setting, cause production inconvenient.
In addition, the bullet block 41, preferably with hoodle, hoodle smooth in appearance is hardly damaged 31 side wall of handle so that switch block more resistant to
With guaranteeing the service life of key switch.Hoodle hits 31 side wall of handle by the driving of second spring 42 or tube-in-tube structure 43 is sent out
Sound, since 31 side wall of handle is additionally provided with protrusion 314, second spring 42 at a distance from the side wall of handle 31 and protrusion on flexible hit
Percussive sound, bigger than the handle of general key switch shock pedestal phonation volume, effect is more preferable when being used as the button switches such as keyboard.
Refering to Fig. 4, the upper casing 12 and pedestal 11 can be integrally fixed using the Nian Jie, forms such as be spirally connected, and preferably be adopted
With the mode of clamping, installation is more convenient.11 bottom of pedestal is additionally provided with drainage hole 111, and in surprisingly water inlet, switch can be with
Auto-drainage avoids water that from can not clearing up damage switch internal structure.
Obviously, the above embodiments of the present invention is merely examples for clearly illustrating the present invention, and
It is not limitations of the embodiments of the present invention.For those of ordinary skill in the art, in above description
On the basis of can also make other variations or changes in different ways.There is no need and unable to give all embodiments
Exhaustion.Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention etc., should be included in
Within the protection scope of the utility model claims.