CN205622616U - Button and medical equipment - Google Patents

Abstract

The utility model discloses a button and medical equipment, this button include, key cap, trigger part and circuit board, trigger part is used for triggering the setting and is in pad on the circuit board still includes: the electrode, form electrode capacitance to ground between electrode and the ground, electric capacity detection circuitry, with electrode electrically connected, the detection arouses owing to pressing the button electrode capacitance to ground's change. Through setting up electrode and electric capacity measuring chip in the button structure at the mechanical type, change through detection electrode capacitance to ground determines presses down the operation whether for the manual operation. This kind sets up the mode, can effectively avoid because mistake touching that artificial slight touching by accident or other objects dropped and cause the stability and the accuracy of guaranteeing to press the key operation.

Description

Button and armarium

Technical field

This utility model relates to human-computer interaction technique field, particularly relates to one and has identification human hand function Button and use the armarium of this button.

Background technology

In many electrical equipments, it usually needs differently configured button, carry out control circuit by button Be switched on and off, to realize different operating functions.Such as to relating to patient in armarium The motor control of personal safety, scan control etc. operate, and these operations include but not limited to control sick bed Move up and down, enter bed and move back bed, light laser lamp, regulation scan aperture luminous environment, open Scanning etc., are generally required for using mechanical key to complete aforesaid operations.Above-mentioned armarium is to use Patient is carried out the large-scale instrument of medical diagnosis on disease or treatment, patient is being carried out image scan or treatment Before, it usually needs carry out patient putting position, and need to consider various factors, sweep to adjust The systematic parameter retouched or treat, in the process, it is ensured that the accuracy of operation is for guaranteeing that patient pacifies Complete and medical diagnosis on disease or treatment accuracy is very important.If owing to operator's clothes scratches Or other objects drop and cause the false triggering of button, it will normally entering of image image scan or treatment OK, also can bring great hidden danger to patient safety simultaneously.

Fig. 1 a, 1b are press-key structure schematic diagram of the prior art, with reference to shown in Fig. 1 a, 1b, commonly Button generally includes keycap 1, support 2, elastic component 3, circuit board 4, and is arranged on circuit board 4 On pad (not shown).In use, press keycap 1, keycap 1 and support 2 and guide knot Moving downward under the guiding of structure (not shown), elastic component 3 deforms upon so that be fixed on elastic component Trigger member 5 below 3 and the contact pads on circuit board 4, circuit ON.In order to reduce other as far as possible The risk that the false triggering of button is brought by object (non-operator triggers on one's own initiative), at present, on market Button generally the most in the following ways:

The first, by the structure of elastic component 3 is designed, button trigger force is increased, if button Elastic component 3 is silica gel elastic arm structure, can the angle of inclination of thickness or elastic arm by arranging elastic arm Adjust trigger force；With reference to shown in Fig. 1 b, if the trigger member of button uses DOM shell fragment 6, Then can also adjust the trigger force of button by selecting the DOM shell fragment of different size, thus ensure light Micro-false touch is touched or the lightest object is pressed onto button and will not cause false triggering.But it is this by increasing Add trigger force to prevent the mode of false touch, handfeel of keys can be caused to reduce, the defect that button is the sensitiveest.

The second, multilamellar is become to trigger button design, such as in double-pole single-throw (D.P.S.T.) button, between two groups of cuttves Possess certain progressive error, after two groups of cuttves all trigger, only just can trigger corresponding action.But This triggering mode is used to cause the structure complexity of button.

3rd, triggered corresponding operating by combination button, reduce the probability of button false triggering.This The mode of kind adds the complexity of operation, is unfavorable for promoting Consumer's Experience.

Above-mentioned three kinds of conventional processing modes have its drawback, therefore, the most effectively prevent the mistake of button Trigger, it is ensured that the stability of button operation and accuracy and Consumer's Experience are the problems needing solution badly.

Utility model content

In order to solve above-mentioned technical problem, this utility model provides a kind of button for armarium, Including, keycap, trigger member and circuit board, described trigger member is arranged on described circuit board for triggering Pad, also include:

Electrode, has formation electrode direct-to-ground capacitance between ground；

Capacitive detection circuit, is electrically connected with described electrode, for detection caused by pressing keys The change of described electrode direct-to-ground capacitance.

Optionally, described electrode is arranged between described keycap and circuit board.

Optionally, described electrode is arranged on the described keycap one side towards described circuit board, described keycap It is made up of insulant.

Optionally, described electrode is arranged on the described circuit board one side towards described keycap, and described tactile Outbox projection on described circuit board falls within outside described electrode.

Optionally, described electrode is embedded in the inside of described keycap or circuit board.

Optionally, described button also includes the support being connected with described keycap, and with described circuit The elastic component that plate is connected, described trigger member is arranged on the described elastic component one side towards described circuit board, Wherein, described electrode is arranged on described support or elastic component.

Optionally, described electrode is embedded in inside described support or elastic component.

Optionally, when described capacitive detection circuit detects the electrode charge and discharge before and after button is pressed respectively Between to determine the change of electrode direct-to-ground capacitance.

This utility model also provides for a kind of armarium, including controller, and button as above, Described controller is electrically connected with described button, according to the described electrode pair caused by pressing keys The operation of pressing keys is identified by the change of ground electric capacity.

This utility model also provides for another armarium, including controller, comparator, Yi Jiru Upper described button, described comparator is electrically connected with described button, to described electrode direct-to-ground capacitance Change is compared with default term of reference, described controller according to comparison result to pressing keys Operation is identified.

The button that this utility model provides, arranges electrode and capacitance detecting in mechanical press-key structure Chip, determines whether subject performance by the change of detecting electrode direct-to-ground capacitance.This set side Formula, can be prevented effectively from and be not intended to slight touching or other objects drop the false touch caused due to artificial Touch, it is ensured that the stability of button operation is with accurate.

The armarium that this utility model provides, by using above-mentioned press-key structure, can be prevented effectively from Owing to touch of key-press by accident causes the maloperation to armarium, and bring damage or to disease to patient Diagnosis and treatment bring unnecessary trouble.

Accompanying drawing explanation

In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below The accompanying drawing used required in embodiment or description of the prior art will be briefly described, it is clear that Ground, the accompanying drawing in describing below is only embodiments more of the present utility model, common for this area From the point of view of technical staff, on the premise of not paying creative work, it is also possible to obtain according to these accompanying drawings Other accompanying drawing.

Fig. 1 a, Fig. 1 b are the structural representation of button in prior art；

Fig. 2 is the structural representation of the button of this utility model embodiment one；

Fig. 3 is the capacitance detecting schematic diagram of the button of this utility model embodiment one；

Fig. 4 is the electrode charge and discharge curve chart of the button of this utility model embodiment one；

Fig. 5 is the structural representation of the button of this utility model embodiment two；

Fig. 6 is electrode and the pad distribution schematic diagram of this utility model embodiment two；

Fig. 7 is the structural representation of the armarium of embodiment three.

Detailed description of the invention

Below in conjunction with the accompanying drawing in this utility model embodiment, to the skill in this utility model embodiment Art scheme is clearly and completely described, it is clear that described embodiment is only this utility model A part of embodiment rather than whole embodiments.Based on the embodiment in this utility model, ability The every other enforcement that territory those of ordinary skill is obtained on the premise of not making creative work Example, broadly falls into the scope of this utility model protection.

Embodiment one:

Fig. 2 is the structural representation of the button of this utility model embodiment one, with reference to shown in Fig. 2, this Disclosed in embodiment, button includes, keycap 10, with the described fixing support 20 being connected of keycap 10, bullet Property part 30, trigger member (not shown), and circuit board 40, described elastic component 30 and described circuit Plate 40 is fixing to be connected.In use, keycap 10, keycap 10 and support 20 are pressed at guide frame (figure Not shown in) guiding under move downward, be transferred to elastic component 30 by pressure, in the present embodiment, elastic Part 30 is plastic cement elastic arm structure, and trigger member is positioned at plastic cement elastic arm structure towards the one of described circuit board 40 On face, plastic cement elastic arm structure above-mentioned by the effect of pressure under deform upon, drive trigger member trigger electricity Pad on road plate 40, so that circuit turn-on, trigger member here can be carbon granules or clipped wire. In the present embodiment, press-key structure arranges electrode 50 and capacitance detecting chip 60, electrode 50 and ground Between can form an equivalent capacity, hereinafter, referred to electrode direct-to-ground capacitance, when staff pressing keys During keycap, electrode direct-to-ground capacitance can be changed, by detecting this capacitance variations, it can be determined that above-mentioned press Whether press operation is manual operation.

With continued reference to shown in Fig. 2, in the present embodiment, keycap 10 is plastics or silica gel material, electrode 50 are arranged on key cap of key set 10, and the fixed form for electrode 50 with keycap 10 does not do particularly limit Fixed, described electrode 50 can be fixed on described keycap 10 towards institute by the way of pasting or inlaying State in the one side of circuit board 40, it is also possible to be embedded in the inside of keycap 10, described capacitance detecting chip 60 are electrically connected, for the change of detecting electrode direct-to-ground capacitance by electrode cable 70 with described electrode 50 Changing, capacitance detecting chip 60 is fixed on the position avoiding pad on circuit board 40.

Fig. 3 is the capacitance detecting schematic diagram of the button of this utility model embodiment one, and Fig. 4 is this practicality The electrode charge and discharge curve chart of the button of new embodiment one, with reference to shown in Fig. 3, Fig. 4, the present embodiment In, electrode 50 is a sheet metal, forms an equivalent capacity i.e. sheet metal over the ground between this sheet metal and ground Electric capacity Cx, owing to also can form an equivalent capacity i.e. human body direct-to-ground capacitance, staff between human body and ground Being equivalent on electrode one electric capacity Cy of parallel connection after pressing keycap, now, sheet metal is the most electric Hold Cz=Cx+Cy.Described capacitance detecting chip 60 detects the change of sheet metal direct-to-ground capacitance in real time, when Above-mentioned pressing operation is by manual operation, and capacitance detecting chip 60 detects that electrode direct-to-ground capacitance increases.

Described capacitance detecting chip 60 has the pulse of intervals to believe by GPIO pin 61 output Number, electrode 50 is carried out discharge and recharge, during electrode 50 is charged, the electricity of electricity level 50 Pressure increases to VDD from 0, and in discharge process, the voltage of electrode is reduced to 0 from VDD, completes once to fill Electric discharge, capacitance detecting chip 60 by GPIO pin 62 by the discharge and recharge time of detecting electrode Detecting electrode direct-to-ground capacitance.In figure, solid line is the electricity when nobody carries out pressing operation to key cap of key set 10 The discharge and recharge time graph of pole 50, by this curve, 50 discharge and recharge times of electrode are t1-t0； Dotted line is to have people that key cap of key set 10 carries out the discharge and recharge time graph of electrode 50 during pressing operation, logical Crossing this curve to understand, when there being people that key cap of key set 10 is carried out pressing operation, electrode direct-to-ground capacitance increases, The discharge and recharge time of electrode 50 is t2-t0, wherein t2 > t1, i.e. when staff key cap of key set 10 carried out by During press operation, the discharge and recharge time of electrode 50 can be elongated.Above-mentioned detection mode is only a kind of example, In other embodiments of this utility model, it would however also be possible to employ other modes detect.

In actual applications, than the human body, when other conductor pressing keys, electrode can also be given The distribution of direct-to-ground capacitance impacts, but due to human body direct-to-ground capacitance distribution and other conductors over the ground The distribution of electric capacity also differs, the discharge and recharge of electrode that therefore capacitance detecting chip 60 detects time Between be also different, can according to the above-mentioned discharge and recharge time distinguish pressing operation be manual operation or Other conductors touch the maloperation caused.

In the present embodiment, key cap of key set 10 and circuit board are respectively provided with electrode 50 and capacitance detecting Chip 60, by this press-key structure, it can be determined that whether pressing operation is by manual operation, thus effectively Avoid the risk caused due to false touch.Particularly in armarium, in order to carry out patient Focal area carries out imaging or treatment, needs such as to control sick bed and moves, controls beam transmitting Deng operation, these operations are all related to the safety of patient, use this press-key structure, can be effectively ensured The safety of patient and medical diagnosis on disease, the accuracy for the treatment of.

Embodiment two

Fig. 5 is the structural representation of the button of this utility model embodiment two, and Fig. 6 is this utility model The electrode of embodiment two and pad distribution schematic diagram；With reference to shown in Fig. 5, Fig. 6, the button of the present embodiment Including, keycap 10 and the described fixing support 20 being connected of keycap 10, elastic component 30, trigger member (figure Not shown in), and circuit board 40, described elastic component 30 is fixing with described circuit board 40 to be connected, electricity Be provided with pad 80 on road plate 40, when trigger member under by the effect of pressure along with elastic component 30 is to leaning on When the direction of nearly described circuit board 40 is moved, trigger member contacts with the pad 80 on circuit board so that Circuit turn-on.The button of the present embodiment, also includes electrode 50 and electrode detection chip 60.The present embodiment Difference with embodiment one is, described electrode 50 and electrode detection chip 60 are arranged on circuit board The position that pad 80 is installed is not affected on 40.Concrete, 40 avoid described pad 80 on circuit boards Position, be provided with and the groove of described electrode 50 mating shapes.In other embodiments, permissible The mode pasted or inlay is used to be fixed on circuit board 40 by electrode 50, it is also possible to be solidified by electrode Inside circuit board 40, the fixed form of electrode detection chip 60 is similar to the fixed form of electrode 50, Here is omitted.

In the present embodiment, trigger member projection on circuit board 40 falls within outside described electrode 50, i.e. Ensure that trigger member will not be positioned at the surface of electrode 50, in order to avoid electrode direct-to-ground capacitance is caused shadow by trigger member Ring.Meanwhile, the present embodiment employing carbon granules is as trigger member, owing to the dielectric constant of carbon granules compares metal elastic The dielectric constant of sheet is big, and therefore carbon granules is as trigger member, it is also possible to effectively reduce trigger member to electrode pair The impact of ground electric capacity.

In the present embodiment, it is assumed that electrode direct-to-ground capacitance is Cx ', human body direct-to-ground capacitance is Cy ', works as staff Contact button, but when not pushing button, be equivalent on electrode and connect electric capacity, now an electrode Direct-to-ground capacitance is Cz1；As human contact pressing keys keycap, be equivalent to parallel connection one on electrode Electric capacity, now electrode direct-to-ground capacitance is Cz2, owing to electrode 50 is arranged on circuit board 40, therefore exists Human contact's button is to during pressing keys, and the distance between staff and electrode is more and more less, to electricity The impact of pole direct-to-ground capacitance becomes big with the less of above-mentioned distance, i.e. Cz2 > Cz1.Therefore the present embodiment In, electrode 50 is arranged on circuit board 40, the most electric by electrode detection chip 60 detecting electrode The change held, except may determine that whether described pressing operation is by manual operation, it is also possible to according to electricity level The variable quantity of direct-to-ground capacitance further discriminates between the district between staff touch key keycap and pressing keys keycap Not.The key arrangement of the present embodiment, can be prevented effectively from due to artificial be not intended to slight touching or The false touch caused of dropping of other objects of person is touched, it is ensured that the stability of button operation and accuracy.

It should be noted that in other embodiments, electrode 50 can also be provided at other structures of button In, support 20 is such as set towards in the one side of described keycap 10, in guide frame, elastic component 30, I.e. being in the position between the keycap 10 of human contact and circuit board 40, its fixed form is permissible Employing is pasted, inlays, is buried (being i.e. arranged on inside support, guide frame or elastic component) underground, if not shadow Ring the arrangement of existing parts in press-key structure.The additionally press-key structure in the present embodiment, is only one Example, it will be understood by those skilled in the art that press-key structure can be there to be the most different forms.

Embodiment three

Fig. 7 is the structural representation of the armarium of this utility model embodiment three, with reference to shown in Fig. 7, On the front end face of the housing of described armarium 100, it is provided with some above-mentioned buttons 102, is used for realizing Control to the parts such as sick bed, laser lamp.Described armarium also includes controller 104, respectively with institute State several buttons 102 to be connected, described for judging according to the testing result of electrode detection chip Whether pressing operation is manual operation, when pressing operation is manual operation, controls phase by controller The parts closed perform concrete operations.On the contrary, if electric capacity is not changed in, then even if button is pressed, Also can be judged as other object false touches, not perform any operation.

Operator are carrying out button operation when, in fact it could happen that following situation: staff touch key Keycap, but there is no pressing keys and perform the plan of a certain concrete operations, and now, touching of staff is dynamic Make also to bring impact, it addition, other conductors in addition to human body lean on to the distribution of electrode direct-to-ground capacitance Closely, when contact or pressing keys, it is also possible to the distribution of electrode direct-to-ground capacitance can be brought impact.Cause This is in order to carry out more precise control to actuation of keys, preset reference range in controller 104, when When the testing result of capacitance detecting chip is in this term of reference, just it is considered artificial pressing operation, Controller controls relevant parts and performs concrete operations.When the testing result of capacitance detecting chip, it is in Outside this reference range, then it is assumed that be not belonging to manual operation, do not perform any operation.Above-mentioned reference Scope can be the temporal summation that electrode carries out a discharge and recharge, the concrete numerical value root of described term of reference Record according to experimental data.

In other embodiments, a comparator can be separately provided, preset reference model in this comparator Enclose, according to testing result and the comparison result of term of reference of electrode detection chip, judge pressing behaviour Whether it is manual operation, thus the associated components controlling armarium performs or do not performs the behaviour of correspondence Make.

The armarium that the present embodiment provides, is possible not only to distinguish artificial pressing operation and non-artificial pressing Operation, and can also distinguish between artificial contact and artificial pressing operation, thus be prevented effectively from due to artificially Be not intended to slight touching or the false touch caused of dropping of other objects is touched, it is ensured that the stability of button operation And accuracy.

The above is preferred implementation of the present utility model, it is noted that for the art Those of ordinary skill for, on the premise of without departing from this utility model principle, it is also possible to if making Dry improvements and modifications, these improvements and modifications are also considered as protection domain of the present utility model.

Claims (10)

1. a button, including, keycap, trigger member and circuit board, described trigger member sets for triggering Put the pad on described circuit board, it is characterised in that also include:

Electrode, has the electrode direct-to-ground capacitance formed between ground；

Capacitive detection circuit, is electrically connected with described electrode, for detection caused by pressing keys The change of described electrode direct-to-ground capacitance.

2. button as claimed in claim 1, it is characterised in that described electrode is arranged on described keycap And between circuit board.

3. button as claimed in claim 1, it is characterised in that described electrode is arranged on described keycap Towards the one side of described circuit board, described keycap is made up of insulant.

4. button as claimed in claim 1, it is characterised in that described electrode is arranged on described circuit Plate is towards the one side of described keycap, and the projection that described trigger member is on described circuit board falls within described electricity Outside pole.

5. button as claimed in claim 1, it is characterised in that described electrode is embedded in described keycap Or the inside of circuit board.

6. button as claimed in claim 1, it is characterised in that described button also includes and described key The support that cap is connected, and the elastic component being connected with described circuit board, described trigger member is arranged on Described elastic component is towards the one side of described circuit board, and wherein, described electrode is arranged on described support or bullet On property part.

7. button as claimed in claim 6, it is characterised in that described electrode is embedded in described support Or inside elastic component.

8. button as claimed in claim 1, it is characterised in that described capacitive detection circuit is examined respectively The electrode charge and discharge time before and after button is pressed of surveying is to determine the change of electrode direct-to-ground capacitance.

9. an armarium, it is characterised in that include controller, and as claim 1-8 is appointed One described button, described controller is electrically connected with described button, according to due to pressing keys institute The operation of pressing keys is identified by the change of the described electrode direct-to-ground capacitance caused.

10. an armarium, it is characterised in that include controller, comparator, and as right is wanted The button described in any one of 1-8, described comparator is asked to be electrically connected with described button, to described electrode pair The change of ground electric capacity is compared with default term of reference, described controller according to comparison result to pressing The operation of pressure button is identified.