CN102054617A

CN102054617A - Flexible printed circuit (FPC) switch

Info

Publication number: CN102054617A
Application number: CN2011100018073A
Authority: CN
Inventors: 余正明
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-01-06
Filing date: 2011-01-06
Publication date: 2011-05-11

Abstract

The invention relates to a flexible printed circuit (FPC) switch which comprises an all-round turning handle, a feel sheet and a rubber body, wherein a plurality of grooves which are circularly arranged at equal intervals and used as feel gears are arranged on the bottom surface of the top wall of the all-round turning handle; the feel sheet is a circular ring-shaped metal sheet which is provided with a plurality of fixing holes and bent in an arched bridge shape; fixing piles corresponding to the fixing holes are arranged on a boss of the rubber body and used for fixing the feel sheet; the cross sections of the grooves are rectangular; and the plurality of fixing holes are at least two fixing holes symmetrically distributed at the roots of two ends of the arched bridge of the circular ring-shaped metal sheet. The invention optimizes the structures of the all-round turning handle and the feel sheet, and changes the azimuth of the gap between the feel sheet and the grooves by the novel structures of the all-round turning handle and the feel sheet, so that the gap between the feel sheet and the grooves is in the Z-axis direction of the grooves, and the technical problem that the existing FPC switch is easy to loose in use is solved by using the pressing force of the internal structure of the FPC switch on the feel sheet in the Z-axis direction, and using the structural characteristics of the using sheet after structural improvement.

Description

A kind of FPC switch

Technical field

The invention belongs to the switching technique field, relate to a kind of FPC switch, this switch application is on electronic products such as mobile phone, digital camera.

Background technology

The space of electronic product such as ultra thin handset, digital camera is limited, so multiple assembly must be merged, takes up room so that save, and also be like this for the FPC switch that is applied on the electronic product.The FPC switch is a device commonly used in the electronic products such as ultra thin handset, digital camera, and the application of FPC switch in electronic products such as mobile phone and digital camera is to realize one of key of this electronic product volume microminiaturization.For the FPC switch is taken up room less as far as possible, prior art is carried out technical research to the FPC switch, and some technological improvements have been made, for example Japan Airlines Electronic Industry Co., Ltd has proposed the JP2009-4209 scheme, as Fig. 1, shown in 2, the disclosed FPC switch of this scheme is by cover plate 1, turning handle 2 all around, feel sheet 3, glue body 4, pad 5, contact chip 6, center handle 7, by center shell fragment 8 and around the shell fragment group formed of shell fragment 9, FPC plate 10 and base plate 11 assemble, center shell fragment 8 and combined encoder between the shell fragment 9 all around, be used on the turning handle 2 around this scheme with glue body 4 on following teat 21 sidewalls that are halved together of boss 41 be provided with annular tongue and groove 22, utilize the slip of feel sheet 3 between emboss pit 22 to produce and switch sense, feel when this scheme strengthens the rotation of FPC switch preferably, solve traditional F PC switch and easily produce the bad problem of feel, but around being located under the turning handle tongue and groove of teat sidewall cause the FPC switch to produce easily with the gap between the feel sheet becoming flexible, influence practical effect.

Summary of the invention

In view of this, the technical problem to be solved in the present invention is that the structure of existing FPC switch is improved, and a kind of loosening FPC switch that in use is not easy to produce is provided.

For solving the problems of the technologies described above, the inventor improves the structure of FPC switch on JP2009-4209 scheme basis, turning handle around being primarily aimed at, the structure of feel sheet is optimized, technical scheme provided by the invention is: a kind of FPC switch, turning handle around comprising, feel sheet and glue body, turning handle roof bottom surface is provided with the equidistant annular a plurality of grooves as the feel gear around described, described feel sheet is one to be provided with a plurality of fixing holes and to be the circular ring metal sheet of arch-shaped bending, and the boss of described glue body is provided with spud pile corresponding with described fixing hole and that be used for fixing the feel sheet.

The present invention by to around the structure of turning handle and feel sheet be optimized, adopt the tongue and groove of the following teat sidewall of turning handle around circular row is arranged in a plurality of grooves replacement JP2009-4209 schemes of equidistant circular row on the roof bottom surface, overcome it and cause the FPC switch to produce loosening technical problem easily, improve result of use.The inventor is by discovering the JP2009-4209 scheme, when turning handle rotation all around, when the feel sheet slides between the tongue and groove of teat sidewall under the turning handle around being located at, the feel sheet is the X of the tongue and groove of teat sidewall, a Y direction and tongue and groove generation gap under the turning handle around be located at, and because the reasons in structure of FPC switch, the gap that produces in tongue and groove X, Y direction lacks restraining force, and this makes the FPC switch be easy to generate loosening main cause just.Therefore, the inventor is by changing the orientation, gap to the improvement of turning handle and feel chip architecture all around, and overcome the defective of prior art in the mode that changes the orientation, gap, promptly on the turning handle roof bottom surface equidistantly annular a plurality of grooves are being set all around, and adopting the circular ring metal sheet that is provided with a plurality of fixing holes and is arch-shaped bending as the feel sheet, the boss of glue body is provided with spud pile corresponding with described fixing hole and that be used for fixing the feel sheet.Turning handle roof bottom surface around at first groove being arranged at, it is the top that the orientation of groove is risen to the feel sheet, even also the notch of groove contacts with the feel sheet downwards, this is the improvement to the feel sheet and the groove way of contact, the loose way of contact between feel sheet and the tongue and groove in the elimination prior art; Moreover the feel sheet adopts the circular ring metal sheet that is provided with a plurality of fixing holes, and the boss of glue body is provided with spud pile corresponding with described fixing hole and that be used for fixing the feel sheet, make the feel sheet securely to be installed in and be difficult on the boss becoming flexible, in addition the circular ring metal sheet being arch-shaped bending process can contact it with the groove above it and generation switching sense between groove when sliding, because of the circular ring metal sheet through being arch-shaped bending process possesses certain elasticity on Z-direction, both can strengthen when sliding the switching sense between itself and the groove, strengthen feel sheet and the applying power between the turning handle all around again, further reach and ensure that the FPC switch is not easy to produce loosening.Utilize fixing hole and spud pile the feel sheet to be fixed on reliably on the boss of glue body during assembling, the gap in feel sheet and groove gap is present on the Z-direction of groove, utilize the press power of FPC switch internal structure, eliminate existing FPC switch loosening technical problem takes place easily in Z-direction.

The cross section of above-mentioned groove is rectangular, and the quantity of groove is decided according to needs of production, but is preferably even number, for example can be 8,10,12 grooves of equidistant circular row on the roof bottom surface.

Preferably, above-mentioned a plurality of fixing hole is at least two fixing holes that are symmetrically distributed in circular ring metal sheet arch bridge two ends root, in proper range, increase fixing hole quantity, can ensure that the feel sheet is fastened on the boss of glue body, and the fixing hole of equal number is arranged at the diameter two ends symmetrically, then be for the balance of feel sheet on boss, guarantee to switch the consistency of sense.As the further optimization of technique scheme, above-mentioned at least two fixing holes are two pairs of fixing holes that are symmetrically distributed in circular ring metal sheet arch bridge two ends root.

Compared with prior art, the present invention has following advantage:

The present invention by to around the structure of turning handle and feel sheet be optimized, adopt novel turning handle all around and feel chip architecture to change the orientation in gap between feel sheet and the groove, the gap in feel sheet and groove gap is present on the Z-direction of groove, utilize FPC switch internal structure to the feel sheet in the press power of Z-direction, feel sheet self structure characteristic after the architecture advances, eliminate existing FPC switch loosening technical problem in use takes place easily, strengthen the switching sense of FPC switch simultaneously.

Description of drawings

Fig. 1 is the JP2009-4209 of a Japan Airlines Electronic Industry Co., Ltd scheme FPC switch exploded view (1); Fig. 2 is the JP2009-4209 of a Japan Airlines Electronic Industry Co., Ltd scheme FPC switch exploded view (2); Fig. 3 is the FPC construction of switch explosive view of the embodiment of the invention 1;

Fig. 4 is a turning handle structure chart around the embodiment of the invention.

Embodiment

For the ease of it will be appreciated by those skilled in the art that the present invention is explained in further detail below in conjunction with embodiment.

Embodiment 1

As Fig. 1, shown in 2, the basic element of character of present embodiment FPC switch and package assembly are similar to the JP2009-4209 scheme that Japan Airlines Electronic Industry Co., Ltd proposes, wherein present embodiment at around turning handle 2, the structure of feel sheet 3 and glue body 4 these three parts is improved, as Fig. 3, shown in 4, in the present embodiment, turning handle 2 roof bottom surfaces are provided with equidistant annular 12 grooves 22 as the feel gear all around, feel sheet 3 is one to be provided with 4 fixing holes 31 and to be the circular ring metal sheet of arch-shaped bending, 4 fixing holes 31 are one group with two and are symmetricly set on circular ring metal sheet arch bridge two ends root that the boss 41 of glue body 4 is provided with 4 spud piles 42 corresponding with described fixing hole and that be used for fixing feel sheet 3.Because turning handle 2 roof bottom surfaces around groove 22 is arranged on, but not following teat 21 sidewalls of turning handle 2 around being arranged on, during assembling, the feel sheet is installed on the boss 41 of glue body 4 by spud pile, turning handle 2 is with after glue body 4 engages all around, annular 12 grooves 22 of turning handle 2 roof bottom surface equal intervals just in time are in the top of feel sheet 3 all around, the gap in feel sheet and groove gap is present on the Z-direction of groove, utilize the press power of FPC switch internal structure, eliminate existing FPC switch loosening technical problem takes place easily in Z-direction.Because the feel sheet is arch-shaped bending, its arch bridge top slip between 12 grooves makes the FPC switch produce the switching sense, because of the feel sheet of arch-shaped bending has elasticity on the Z-direction, both can strengthen when sliding the switching sense between itself and the groove, strengthen feel sheet and the applying power between the turning handle all around again, further reach and ensure that the FPC switch is not easy to produce loosening.

Embodiment 2

The basic element of character of present embodiment FPC switch and package assembly are similar to the JP2009-4209 scheme that Japan Airlines Electronic Industry Co., Ltd proposes, present embodiment at around turning handle 2, the structure of feel sheet 3 and glue body 4 these three parts is improved, but it is different with embodiment 1, turning handle 2 roof bottom surfaces are provided with equidistant annular 10 grooves 22 as the feel gear around in the present embodiment, feel sheet 3 is one to be provided with 2 fixing holes and to be the circular ring metal sheet of arch-shaped bending, 2 fixing holes are symmetrically distributed in circular ring metal sheet arch bridge two ends root respectively, and the boss 41 of glue body 4 is provided with 2 spud piles corresponding with described fixing hole and that be used for fixing the feel sheet.

The foregoing description is a preferred implementation of the present invention, and in addition, the present invention can also have other implementations.That is to say that under the prerequisite that does not break away from inventive concept of the present invention, any conspicuous replacement also should fall within protection scope of the present invention.

Claims

1. FPC switch, turning handle (2), feel sheet (3) and glue body (4) around comprising, it is characterized in that: turning handle roof bottom surface is provided with the equidistant annular a plurality of grooves (22) as the feel gear around described, described feel sheet (3) is one to be provided with a plurality of fixing holes (31) and to be the circular ring metal sheet of arch-shaped bending, and the boss (41) of described glue body (4) is provided with spud pile (42) corresponding with described fixing hole (31) and that be used for fixing feel (3) sheet.

2. FPC switch according to claim 1 is characterized in that: the cross section of described groove (22) is rectangular.

3. according to claim 1 or 2 described FPC switches, it is characterized in that: described a plurality of fixing holes (31) are for being symmetrically distributed at least two fixing holes (31) of circular ring metal sheet arch bridge two ends root.

4. according to the described FPC switch of claim 3, it is characterized in that: described at least two fixing holes (31) are for being symmetrically distributed in two pairs of fixing holes (31) of circular ring metal sheet arch bridge two ends root.