CN201936251U - Touch feedback device - Google Patents

Abstract

The utility model provides a touch feedback device, which comprises a touch screen, a base, a piezoelectric vibrator which is far away from the touch screen and fixed on the base, and a The housing that fixes the touch screen and the base, the piezoelectric vibrator includes a pin, a pin shaft fixed on the base, a piezoelectric sheet fixed on the base at both ends, and receives the vibration displacement output from the middle of the piezoelectric sheet The first connecting rod, the second connecting rod that is connected to the first connecting rod through a pin and can rotate around the pin shaft, the third connecting rod that receives the vibration displacement output by the second connecting rod and is connected with the housing; the second connecting rod The point where the connecting rod is connected to the pin shaft is the second fixed point, the point where the second connecting rod is connected to the first connecting rod is the first fixed point, and the point where the second connecting rod is connected to the third connecting rod is the third fixed point. The distance from the second fixed point to the third fixed point is greater than the distance from the second fixed point to the first fixed point. The touch feedback device of the utility model can make the vibration performance of the product more obvious.

Description

touch feedback device

【Technical field】

The utility model relates to a tactile feedback system, in particular to a touch feedback device.

【Background technique】

Piezoelectric vibrators are widely used. For example, piezoelectric vibrators are widely used on mobile phones. They are a reminder of incoming calls on mobile phones, making people feel the dynamics of incoming calls on mobile phones.

The piezoelectric vibrator related to the utility model includes a piezoelectric sheet, and the piezoelectric sheet is directly connected to the touch screen, and the touch feedback device with such a structure does not have a strong sense of vibration.

Therefore, it is necessary to provide a novel touch feedback device.

【Content of utility model】

The purpose of the utility model is to solve the above-mentioned problem that the vibration sense of the structure is not strong, and provide a touch feedback device that can make the vibration performance of the product more obvious.

The technical solution of the present utility model is as follows: a touch feedback device, which includes a touch screen, a base, a piezoelectric vibrator that is far away from the touch screen and fixed on the base, and is sandwiched between the touch screen and the base Between the fixed touch screen and the housing of the base, the piezoelectric vibrator includes a pin, a pin shaft fixed on the base, a piezoelectric sheet fixed on the base at both ends, and the middle output of the piezoelectric sheet is received. The vibration displacement of the first connecting rod, the second connecting rod connected with the first connecting rod through a pin and rotatable around the pin axis, the third connecting rod receiving the vibration displacement output by the second connecting rod and connected with the housing; The point where the second connecting rod is connected with the pin shaft is the second fixed point, the point where the second connecting rod is connected with the first connecting rod is the first fixed point, and the point where the second connecting rod is connected with the third connecting rod is the third fixed point , the distance from the second fixed point to the third fixed point is greater than the distance from the second fixed point to the first fixed point.

Preferably, the touch feedback device further includes a support frame for connecting the first connecting rod and the piezoelectric sheet.

Preferably, the support frame is provided with a groove, and the middle position of the piezoelectric sheet is fixed in the groove.

Preferably, the groove is provided with a bottom wall and a first side wall and a second side wall extending along the bottom wall to form a receiving space, the first side wall is provided with a through hole, and the second side wall extends a A platform parallel to the bottom wall, one end of the first connecting rod is fixed on the platform.

Preferably, the support frame further includes a fixing bolt riveted with the through hole.

Preferably, the touch feedback device further includes a first fixing portion and a second fixing portion respectively fixing two ends of the piezoelectric sheet.

Preferably, a baffle is interposed between the first side wall and the piezoelectric sheet, and the baffle and the fixing bolt interfere with each other.

Preferably, the bracket includes a body and a limiting hole extending from the body.

The beneficial effect of the utility model is that by adjusting the position of the pin shaft, the magnification ratio of the amplitude can be adjusted, so that the amplitude of the piezoelectric sheet is amplified, so that the third connecting rod drives the vibration of the support to strengthen, thereby making the vibration performance of the touch screen more obvious.

【Description of drawings】

Fig. 1 is a three-dimensional exploded view of an embodiment of the touch feedback device of the present invention;

FIG. 2 is a partial structural perspective view of an embodiment of the touch feedback device of the present invention.

【Detailed ways】

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Fig. 1 and Fig. 2, it is a touch feedback device according to an embodiment of the present utility model. An electric vibrator, and a housing 30 for fixing the touch screen 10 and the base 20 sandwiched between the touch screen 10 and the base 20, the touch feedback device also includes a support frame connected with the piezoelectric vibrator 50.

The casing 30 and the touch screen 10 are glued and fixed together. The casing 30 is provided with a body (not marked) and a limiting hole 31 extending along the body. The bolt 13 can define the position of the limiting hole 31 , so as to limit the vibration area of the housing 30 .

The support frame 50 is provided with a groove 510, and the groove 510 is provided with a bottom wall (not marked), a first side wall 511 extending from the bottom wall to form a receiving space, and a second side parallel to the first side wall 511 Wall 512, the first side wall 511 is provided with a through hole 510, the support frame 50 also includes a fixing bolt 51 riveted with the through hole 510, and a platform 513 parallel to the bottom wall extends from the second side wall 511 .

The piezoelectric vibrator includes a pin (not shown), a pin shaft 60 fixed on the base 20, and a piezoelectric sheet 44 whose two ends are respectively fixed on the base 20 by the first fixing part 71 and the second fixing part 72. , the first connecting rod 41 that receives the vibration displacement output in the middle of the piezoelectric sheet 44, the second connecting rod 42 that is connected to the first connecting rod 41 through a pin and can rotate around the pin shaft 60, and receives the vibration output by the second connecting rod 42 The third connecting rod 43 that is displaced and connected to the housing 30 is interposed between the piezoelectric sheet 44 and the first side wall 511 with a blocking piece 80, and the blocking piece 80 and the fixing bolt 51 interfere with each other, so that Protect the piezoelectric sheet 44 . The point where the second connecting rod 42 is connected to the pin shaft 60 is the second fixed point (not marked), the point where the second connecting rod 42 is connected to the first connecting rod 41 is the first fixed point (not marked), and the second connecting rod 42 is connected to the first connecting rod 41 is the first fixed point (not marked). The connection point between the rod 42 and the third connecting rod 43 is a third fixed point (not marked), the distance from the second fixed point to the first fixed point is L1, the distance from the second fixed point to the third fixed point is L2, and L1 is smaller than L2. Set the direction moving towards the touch screen 10 as the positive direction, and the direction moving away from the touch screen 10 as the negative direction. When the piezoelectric sheet 44 moves in the positive direction for a distance of D1, the vibration drives the first through the support frame 50. A connecting rod 41 moves in the positive direction, and the moving distance is D1; the first connecting rod 41 drives the second connecting rod 42 to rotate around the pin shaft 60; the second connecting rod 42 drives the third connecting rod 43 to move in the negative direction, and the moving distance is D2: Since the third connecting rod 43 is fixed to the support 30, the support 30 also moves in the negative direction, and the movement distance is also D2, and the distance that drives the touch screen 10 to move in the negative direction is also D2. Since L1 is smaller than L2, it can be known that D1 is smaller than D2, that is, the moving distance of the touch screen 10 is greater than the moving distance of the piezoelectric sheet 44 . Similarly, the same effect is achieved when the piezoelectric sheet 44 moves in the negative direction, thus, the piezoelectric sheet 44 moves back and forth, driving the touch screen 10 to move back and forth, but the movement distance of the touch screen 10 is greater than that of the piezoelectric sheet 44 The movement distance of the piezoelectric sheet 44 is amplified, and the vibration performance of the touch screen 10 is more obvious.

In the touch feedback device of the present invention, by adjusting the position of the pin shaft 60, that is, on the premise that L1 is greater than L2, by adjusting the ratio of L1 to L2, the amplification ratio of the amplitude can be adjusted.

In the above-mentioned utility model touch feedback device, the first connecting rod 41, the second connecting rod 42, the third connecting rod 43, the pin shaft 60 and the limiting hole 31 are respectively two, and all of them are made of a piezoelectric sheet 44 The middle position is left-right symmetrical.

What has been described above is only the embodiment of the utility model, and it should be pointed out that for those of ordinary skill in the art, improvements can also be made without departing from the inventive concept of the utility model, but these all belong to Protection scope of the present utility model.

Claims (8)

1. A touch feedback device comprising a touch screen, a base, a piezoelectric vibrator away from the touch screen and fixed on the base, and a fixed touch sensor sandwiched between the touch screen and the base The shell of the screen and the base is characterized in that the piezoelectric vibrator includes a pin, a pin shaft fixed on the base, a piezoelectric sheet fixed at both ends on the base, and receives the vibration output from the middle of the piezoelectric sheet. The first connecting rod that is displaced, the second connecting rod that is connected to the first connecting rod through a pin and can rotate around the pin shaft, and the third connecting rod that receives the vibration displacement output by the second connecting rod and is connected with the housing; the second connecting rod The point where the second connecting rod is connected with the pin shaft is the second fixed point, the point where the second connecting rod is connected with the first connecting rod is the first fixed point, and the point where the second connecting rod is connected with the third connecting rod is the third fixed point, so The distance from the second fixed point to the third fixed point is greater than the distance from the second fixed point to the first fixed point. 2 . The touch feedback device according to claim 1 , further comprising a support frame for connecting the first connecting rod and the piezoelectric sheet. 3 . 3 . The touch feedback device according to claim 2 , wherein the supporting frame is provided with a groove, and the middle position of the piezoelectric sheet is fixed in the groove. 4 . 4. The touch feedback device according to claim 3, wherein the groove is provided with a bottom wall and a first side wall and a second side wall extending along the bottom wall to form a storage space, and the first side The wall is provided with a through hole, a platform parallel to the bottom wall is extended from the second side wall, and one end of the first connecting rod is fixed on the platform. 5. The touch feedback device according to claim 4, wherein the support frame further comprises a fixing bolt riveted with the through hole. 6 . The touch feedback device according to claim 5 , wherein a blocking piece is interposed between the first side wall and the piezoelectric sheet, and the blocking piece and the fixing bolt interfere with each other. 7 . 7 . The touch feedback device according to claim 6 , further comprising a first fixing portion and a second fixing portion respectively fixing two ends of the piezoelectric sheet. 8. The touch feedback device according to claim 1, wherein the bracket comprises a body and a limiting hole extending from the body.

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