KR20160141304A - Force Sensor Module And Display Device including The Same - Google Patents

Abstract

A display device according to an embodiment of the present invention includes a bottom cover which includes grooves formed on four edges thereof, a guide panel and a backlight unit which are mounted inside the bottom cover, a liquid crystal panel which is arranged on the upper side of the guide panel, and a plurality of force sensors which are arranged between the lower side of a non-display region of the liquid crystal panel and the upper sides of four edges of the guide panel. The plurality of force sensors are connected to a flexible printed circuit board. The plurality of force sensors are inserted into the bottom cover through the grooves and are arranged on the upper side of the guide panel. Accordingly, the present invention performs touch position sensing and force sensing without increasing the thickness of a liquid crystal display device.

Description

[0001] The present invention relates to a force sensor module and a display device including the force sensor module.

The present invention relates to a force sensor module applicable to Narrow Bezel and a display device including the same.

2. Description of the Related Art A touch panel (or a touch screen) is widely used as a means for inputting a signal on the display surface of a display device without using a remote controller or a separate input device in order to efficiently use various electronic devices. Such a touch panel is installed on the display surface of a flat display device such as an electronic notebook, a liquid crystal display device, a plasma display panel (PDP), and an OLED display device and an image display device such as a CRT (Cathode Ray Tube) And to select the desired information.

The known touch panel touch methods include Resistive Overlay, Capacitive Overlay, Infrared Beam, Surface Acoustic Wave, and Force Sensing, And a force sensing method capable of distinguishing between the two.

1 shows a force sensor module according to the prior art.

Referring to FIG. 1, a force sensor type touch panel 1 according to the related art includes a touch pad 10 and a force sensor module 20.

The force sensor module 20 according to the related art includes a flexible printed circuit board (FPCB) 24 on which a plurality of force sensors 22 and a plurality of force sensors 22 are disposed, and the touch pad 10 . One force sensor 22 is disposed below each of the four corners of the touch pad 10 and a force value measured by the four force sensors 22 is calculated when the touch pad 10 is touched, The position and the applied force can be sensed.

The flexible circuit board 24 of the force sensor module 20 according to the prior art has a simple I-shape and is limited in position to embed the four force sensors 22 to increase the image problem and thickness of the display device There is a problem.

2 is a view for explaining a problem that the thickness of a liquid crystal display device becomes thick when a force sensor module is disposed below a liquid crystal panel.

Referring to FIG. 2, a liquid crystal display device according to the related art is disclosed. A reflection plate 32, a light guide plate 33, a guide panel 34 and a plurality of optical sheets 35 are disposed in the inner space of the cover bottom 31. [ A liquid crystal panel 36 is disposed on the plurality of optical sheets 35 and a cover glass 37 is disposed to cover the liquid crystal panel 36. [ A force sensor module 20 is disposed between the upper portion of the guide panel 34 and the lower portion of the liquid crystal panel 36. The force sensor 22 of the force sensor module 20 is disposed at four corners of the guide panel and four corners of the liquid crystal panel 36.

There is a problem that the thickness of the liquid crystal display device is increased by the height of the force sensor module 20 when the force sensor module 20 according to the related art is disposed on the upper portion of the guide panel 35 and the lower portion of the liquid crystal panel 36 have. Further, there is a problem that the force sensor 22 and the flexible circuit board 24 can penetrate into the active area A / A, which can affect the image.

3 is a view for explaining a problem that the thickness of the liquid crystal display device becomes thick when the force sensor module is disposed under the backlight unit.

3, in order to prevent the force sensor 22 and the flexible circuit board 24 from intruding into the active area A / A and affecting the image, the force sensor module 20 is attached to the bottom cover 31 And the lower surface of the reflection plate 32. [0054]

However, even if the force sensor module 20 is disposed between the upper surface of the bottom cover 31 and the lower surface of the reflection plate 32, the thickness of the liquid crystal display device is increased by the height of the force sensor module 20.

A touch pad and a manufacturing method thereof (Korean Laid-Open Publication No. 10-2013-0040060)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a force sensor module which does not increase the thickness of a liquid crystal display device.

SUMMARY OF THE INVENTION The present invention provides a force sensor module applicable to a narrow bezel and a display device including the force sensor module.

Other features and advantages of the invention will be set forth in the description which follows, or may be obvious to those skilled in the art from the description and the claims.

A force sensor module according to an embodiment of the present invention includes a flexible circuit board and a plurality of force sensors. The flexible circuit board includes a plurality of side lines arranged at a predetermined interval in a first direction, a center line disposed between the plurality of side lines, a connector line branched at a central portion of the center line, And a plurality of extension lines extending in the horizontal direction at upper and lower portions of each of the plurality of side lines. The plurality of extension lines each include a force sensor support portion in which the force sensor is disposed, and a bending portion disposed between the force sensor support portion and the side line.

Further, the plurality of side lines, the center line, the connector line, and the plurality of extension lines of the force sensor module according to the embodiment of the present invention are electrically connected, and the routing from the plurality of force sensors to the connector pads The length is the same.

Further, a force sensor module according to an embodiment of the present invention is characterized in that the force sensor is disposed on the back side of the force sensor support, and the force sensor is disposed between the side line and the force sensor support so as to be disposed inside the liquid crystal display module The bending portion is bent.

In addition, the force sensor module according to the embodiment of the present invention includes: And four force sensors arranged so as to coincide at the four corners of the display device so that the touch position and the force sensing on the display screen are performed.

In addition, the force sensor module according to the embodiment of the present invention includes: The touch sensing data and force sensing data generated by the plurality of force sensors are transmitted to a touch IC (Integrated Circuit) through one connector pad.

A display device according to an embodiment of the present invention includes a bottom cover including grooves formed at four corners, a guide panel and a backlight unit mounted inside the bottom cover, a liquid crystal panel disposed on the guide panel, And a plurality of force sensors disposed between the upper portion and the lower portion of the non-display region of the liquid crystal panel at four corners of the guide panel. The plurality of force sensors are fastened to the flexible circuit board and inserted into the bottom cover through the grooves and disposed on the guide panel.

Further, grooves are arranged at four corners of the guide panel of the display device according to the embodiment of the present invention, and the plurality of force sensors are disposed in the grooves.

Further, the flexible circuit board of the display device according to the embodiment of the present invention includes a plurality of side lines arranged at a predetermined interval in a first direction, a center line disposed between the plurality of side lines, And a plurality of extension lines extending in the horizontal direction at upper and lower portions of each of the plurality of side lines, wherein the side lines, the center line, and the connector line And is disposed on the back surface of the cover bottom.

Further, the plurality of extension lines of the display device according to the embodiment of the present invention may include a plurality of force sensor support portions in which the plurality of force sensors are disposed, and a plurality of force sensor support portions, And the plurality of bending portions are bent so as to surround the outer side of the cover bottom.

Also, in the display device according to the embodiment of the present invention, the bending portion is bent by 90 degrees to come into contact with the side wall of the cover bottom, and the bending portion is further bent by 90 degrees so that the force sensor support portion and the force sensor And is inserted into the cover bottom through the groove.

The force sensor module according to the embodiment of the present invention can perform touch position sensing and force sensing without increasing the thickness of the liquid crystal display device.

The present invention can provide a force sensor module applicable to Narrow Bezel and a display device including the same.

The display device according to the embodiment of the present invention disposes the force sensor module such that the interference of the active area is avoided so that the problem of the image by the force sensor module does not occur.

The force sensor module according to the embodiment of the present invention may be arranged such that a plurality of force sensors have the same routing length to improve the accuracy of touch position sensing and force sensing.

Other features and effects of the present invention may be newly understood through the embodiments of the present invention in addition to the features and effects of the present invention mentioned above.

1 shows a force sensor module according to the prior art.
2 is a view for explaining a problem that the thickness of a liquid crystal display device becomes thick when a force sensor module is disposed below a liquid crystal panel.
3 is a view for explaining a problem that the thickness of the liquid crystal display device becomes thick when the force sensor module is disposed under the backlight unit.
4 is a view showing a force sensor module according to an embodiment of the present invention.
5 is an enlarged view of a portion A in Fig.
6 is a view showing that four force sensors included in the force sensor module are disposed at four corners of the liquid crystal display module.
Fig. 7 is a view showing that the extension with the force sensor module mounted thereon is bent and disposed inside the liquid crystal display module through the groove disposed in the cover bottom.
8 is a view showing that four force sensors included in the force sensor module are disposed on the upper surface of the guide panel.
9 is a cross-sectional view taken along the line A1-A2 shown in Fig.
10 is a cross-sectional view taken along the line B1-B2 shown in FIG.

Hereinafter, a force sensor module according to an embodiment of the present invention and a display device including the force sensor module will be described with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. To fully disclose the scope of the invention to a person skilled in the art, and the invention is only defined by the scope of the claims.

The shapes, sizes, ratios, angles, numbers, and the like disclosed in the drawings for describing the embodiments of the present invention are illustrative, and thus the present invention is not limited thereto. Like reference numerals refer to like elements throughout the specification. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. In the case where the word 'includes', 'having', 'done', etc. are used in this specification, other parts can be added unless '~ only' is used. Unless the context clearly dictates otherwise, including the plural unless the context clearly dictates otherwise.

In interpreting the constituent elements, it is construed to include the error range even if there is no separate description.

In describing embodiments of the present invention, when it is described that a structure (electrode, line, wiring layer, contact) is formed on top of, above, below, or below another structure, But also to the case where a third structure is interposed between these structures.

In the case of a description of a temporal relationship, for example, if the temporal relationship is described by 'after', 'after', 'after', 'before', etc., May not be continuous unless they are not used.

The first, second, etc. are used to describe various components, but these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, the first component mentioned below may be the second component within the technical spirit of the present invention.

It is to be understood that each of the features of the various embodiments of the present invention may be combined or combined with each other, partially or wholly, technically various interlocking and driving, and that the embodiments may be practiced independently of each other, It is possible.

FIG. 4 is a view showing a force sensor module according to an embodiment of the present invention, and FIG. 5 is an enlarged view of part A of FIG.

4 and 5, the force sensor module 100 according to the embodiment of the present invention includes four force sensors 110 and four force sensors 110 for sensing a position and a force of a touch on a display screen, And a flexible circuit board 120 (FPCB) for transmitting a sensing signal from the four force sensors 110.

The flexible circuit board 120 includes two side lines 122a arranged in a first direction (vertical direction), a center line 120b branched from the center of the two side lines 122a and arranged in a second direction And a connector line 122c branched from the center of the center line 122b in a first direction and having a connector pad 126 disposed at an end thereof. That is, the two side lines 122a are arranged at regular intervals, and the center line 122b is disposed between the two side lines 122a. Two side lines 122a and a center line 122b constitute the flexible circuit board 120 in a basically H-shape and the H-shaped flexible circuit board 120 further includes a connector line 122c .

In addition, the flexible circuit board 120 includes a plurality of extension lines 124 in which a plurality of force sensors 110 are disposed. The two side lines 122a, the center line 122b, the connector line 122c, and the extension line 124 of the flexible circuit board 120 are electrically connected to each other.

Here, the plurality of extension lines 124 are formed so as to extend in the horizontal direction at the upper and lower portions of each of the two side lines 122a. Two extension lines 124 are branched at the top and bottom of the left side line 122a and two extension lines 124 are branched at the top and bottom of the right side line 122a. Thus, a total of four extension lines 124 are arranged.

The extension line 124 is branched in the longitudinal direction of the side line 122a to extend its length and the angle between the side line 122a and the extension line 124 is 90 degrees. However, it is not necessarily limited thereto, and the angle between the side line 122a and the extension line 124 may be smaller or larger than 90 degrees.

This extension line 124 includes a bending portion 124a and a force sensor support 124b. The force sensor 110 is disposed on the back surface of the force sensor support portion 124b and the bending portion 124a disposed between the side line 122a and the force sensor support portion 124b is bent, It is placed inside the module.

When applied to a liquid crystal display device, the extension line 124 of the flexible circuit board 120 is disposed on the upper surface of the guide panel. The side lines 122a of the flexible circuit board 120 are arranged to correspond to the back side of the bottom cover. The center line 122b and the connector line 122c of the flexible circuit board 120 are arranged to correspond to the center of the bottom surface of the bottom cover.

The connector pad 126 of the connector line 122c is in contact with a separate cable connected to a touch IC (not shown), and a touch generated by the four force sensors 110 via one connector pad 126 Sensing data and force sensing data are transmitted to the touch IC.

The connector line 122c is branched at the center of the center line 122b so that the routing lengths from the four force sensors 110 to the connector pads 126 are all the same. If the routing lengths of the wires are different, an error may occur in the signal transmitted due to the difference in resistance value. On the other hand, the force sensor module 100 according to the embodiment of the present invention is arranged so that the four force sensors 110 have the same routing length, thereby improving the accuracy of the touch position sensing and force sensing.

6 is a view showing that four force sensors included in the force sensor module are disposed at four corners of the liquid crystal display module.

Referring to FIG. 6, in order to sense a touch position and a force on a display screen, a force sensor 110 is disposed at four corners of the LCD module. At this time, the force sensor 110 is disposed on the upper surface of the guide panel and below the non-display area of the liquid crystal panel so that the force sensor 110 does not touch the active area.

The force sensor 110 may be a square shape thin force sensor which is made of a micro pore technology (MEMS) on a wafer and can sense a load in three axis (X, Y, Z) directions. However, the present invention is not limited to this, and other types of force sensors other than the MEMS method may be applied.

Fig. 7 is a view showing that the extension with the force sensor module mounted thereon is bent and disposed inside the liquid crystal display module through the groove disposed in the cover bottom.

Referring to FIG. 7, a groove 212 is formed in each of the four corner portions of the cover bottom 210. When the force sensor support portion 124b of the extension line 124 and the force sensor 110 penetrate the groove 212 of the cover bottom 210 such that the force sensor support portion 124b and the force sensor 110 are positioned on the cover bottom 210, respectively.

" 형상을 가진다. 내부에 실장되는 가이드 패널의 상면과 대응되는 위치에서 커버 보텀(210)의 홈(212)이 시작되고, 힘 센서 지지부(124b) 및 힘 센서(110)가 관통할 수 있는 높이로 커버 보텀(210)의 홈(212)이 형성되어 있다.Here, the grooves 212 arranged at the four corners of the cover bottom 210 are formed in the shape of "

The groove 212 of the cover bottom 210 starts at a position corresponding to the upper surface of the guide panel to be mounted inside and the height at which the force sensor support portion 124b and the force sensor 110 can penetrate The groove 212 of the cover bottom 210 is formed.

4 and 5, the force sensor 110 is shown disposed on the back surface of the extension line 124 (specifically, disposed on the back surface of the force sensor support 124b). However, when applied to a liquid crystal display device, the bending portion 124a of the extension line 124 is bent so that the force sensor 110 is positioned on the force sensor support portion 124b, and the force sensor 110 is positioned on the upper side As shown in FIG. That is, the force sensor support portion 124b is disposed on the upper surface of the guide panel, and the force sensor 110 is disposed on the force sensor support portion 124b. A liquid crystal panel is disposed on the force sensor 110.

Specifically, the bending portion 124a of the extension line 124 is bent by 90 degrees to come into contact with the side wall of the cover bottom 210. [ The bending portion 124a is further bent 90 degrees so that the force sensor support portion 124b and the force sensor 110 are inserted into the cover bottom 210 through the groove 212 of the cover bottom 210 . An adhesive layer 128 is disposed on the lower surface of the force sensor support portion 124b and a force sensor 110 is disposed on the upper surface of the force sensor support portion 124b. A double-sided adhesive may be applied to the adhesive layer 128, and the force sensor 110 is fixed by the adhesive layer 128.

  On the other hand, the side lines 122a, the center lines 122b, and the connector lines 122c of the flexible circuit board 120 are positioned on the back surface of the bottom cover.

That is, the force sensor 110 disposed in the force sensor support 124b of the extension line 124 is disposed inside the liquid crystal display module. The side lines 122a, the center lines 122b, and the connector lines 122c of the flexible circuit board 120 are disposed outside the liquid crystal display module. The force sensor support portion 124b in which the force sensor 110 is disposed is disposed inside the liquid crystal display module and the bending portion 124a is disposed outside the liquid crystal display module.

The force sensor 110 is described as being fastened to the flexible circuit board 120 but the present invention is not limited thereto and other portions of the flexible circuit board 120 other than the bending portion 124a may be made of a non- As shown in FIG.

Fig. 8 is a view showing that four force sensors included in the force sensor module are disposed on the upper surface of the guide panel, Fig. 9 is a view showing a cross section along a line A1-A2 shown in Fig. 8, 8 is a cross-sectional view taken along the line B1-B2 shown in Fig.

8 to 10, a specific embodiment in which the force sensor module 100 according to the embodiment of the present invention is applied to a liquid crystal display device will be described.

The display device 200 of the present invention includes a force sensor module 100 and a liquid crystal display module.

The liquid crystal display module includes a cover bottom 210, a reflection plate 220, a light guide plate 230, a guide panel 240, a plurality of optical sheets 250, a liquid crystal panel 260, and a cover glass 270. Since the liquid crystal panel 260 can not generate light itself, a separate light source is required to display the screen. 8 to 10, the display device 200 of the present invention includes a light source for supplying light to the liquid crystal panel 260. [

A guide panel 240 is disposed inside the cover bottom 210 and a reflection plate 220 and a light guide plate 230 are disposed in an inner space of the guide panel 240. A plurality of optical sheets 250 are disposed on the light guide plate 230.

" 형상을 가진다.The guide panel 240 is formed at its four corners with a force sensor support portion 124b and a groove 242 in which the force sensor 110 is seated. Here, the grooves 242 arranged at the four corners of the guide panel 240 are formed in the shape of "

"It has a shape.

The force sensor support portion 124b of the flexible circuit board 120 and the force sensor 110 are arranged in the groove of the guide panel 240. [ At this time, the force sensor 110 is disposed on the force sensor support portion 124b. As described above, the force sensor support portion 124b and the force sensor 110 are disposed in the groove 242 of the guide panel 240. [ The force sensor support portion 124b is fixed to the groove 242 of the guide panel 240 by the adhesive layer 128 to prevent the force sensor 110 from flowing even when external shock and vibration are applied.

Although the adhesive layer 128, the force sensor support portion 124b and the force sensor 110 are overlapped and have a certain thickness, the adhesive layer 128 and the force sensor support portions 124b And the thickness of the guide panel 240 is reduced by the thickness of the force sensor 110. Therefore, even if the force sensor 110 is disposed in the liquid crystal display device, the thickness is not increased. At this time, the entire thickness of the guide panel 240 is not reduced, and the thickness of the portion where the groove 242 is formed is reduced. The force sensor support portion 124b of the extension line 124 and the force sensor 110 are inserted into the cover bottom 210 through the groove 212 formed in each of the four corner portions of the cover bottom 210. [ The force sensor support portion 124b and the force sensor 110 inserted in the cover bottom 210 are disposed on the upper portion of the guide panel 240. [

In order to prevent the thickness of the liquid crystal display device from becoming thick even if the force sensor support portion 124b and the force sensor 110 are disposed on the guide panel 240, the height of the force sensor support portion 124b and the force sensor 110 The height of the guide panel 240 is adjusted.

The height of the upper surface of the guide panel 240 is set to coincide with the lower end of the groove 212 of the cover bottom 210. That is, the lower end of the groove 212 of the cover bottom 210 and the upper surface of the guide panel 240 have the same height. Even if the force sensor supporting portion 124b and the force sensor 110 are disposed on the guide panel 240 by lowering the height of the guide panel 240 by the height of the force sensor supporting portion 124b and the force sensor 110, The thickness is not increased.

The side lines 122a, the center lines 122b and the connector lines 122c of the flexible circuit board 120 are positioned on the back surface of the cover bottom 210 so that the image is blocked by the flexible circuit board 120 Can be prevented. Also, the connection between the connector pad 126 disposed at the end of the connector line 122c and the touch IC (not shown) can be facilitated.

The bending portion 124a of the extension line 124 is bent so as to cover the outer side of the cover bottom 210 and the force sensor support portion 124b and the force sensor 110 are positioned inside the cover bottom 210 So that the non-display area of the liquid crystal display device is not increased.

Even when the force sensor module 100 according to the embodiment of the present invention is applied, the distance from the end of the active area A / A of the liquid crystal panel 260 to the end of the guide panel 240 becomes 1.35 mm Narrow bezel can be implemented. That is, there is no limitation in applying the force sensor module 100 to the narrow-model liquid crystal display device.

Although the force sensor module 100 according to the embodiment of the present invention has been described above as being applied to the liquid crystal display device, the force sensor module 100 according to the embodiment of the present invention is not limited to the liquid crystal display device, A flat panel display device, and a flexible display device. Further, the force sensor module 100 according to the embodiment of the present invention can be applied not only to a flat panel display device but also to other pads for sensing pressure such as a mouse pad.

Although the force sensor module 100 has been described above as including four force sensors 110, the force sensor module 100 may include three force sensors or more than five force sensors.

It will be understood by those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: force sensor module
110: Force sensor
120: Flexible circuit board
122a: Side line
122b: center line
122c: connector line
124: extension line
124a:
124b: Force sensor support
126: Connector pads
128: Adhesive layer
200: display device
210: Cover Bottom
212: Home
220: reflector
230: light guide plate
240: Guide panel
242: Home
250: a plurality of optical sheets
260: liquid crystal panel
270: cover glass

Claims (11)

A plurality of side lines disposed in a first direction at regular intervals, a center line disposed between the plurality of side lines, a connector line branched at a central portion of the center line and having a connector pad disposed at an end thereof, A flexible circuit board including a plurality of extension lines extending in a horizontal direction at upper and lower portions thereof; And
And a plurality of force sensors disposed on each of the plurality of extension lines,
Wherein each of the plurality of extension lines includes a force sensor support portion in which the force sensor is disposed and a bending portion disposed between the force sensor support portion and the side line. The method according to claim 1,
The plurality of side lines, the center line, the connector line, and the plurality of extension lines are electrically connected,
And wherein a routing length from the plurality of force sensors to the connector pads is equal. The method according to claim 1,
The force sensor is disposed on the back surface of the force sensor support,
And a bending portion disposed between the side line and the force sensor support such that the force sensor is disposed inside the liquid crystal display module. The method according to claim 1,
And a force sensor module including four force sensors arranged to be equal at four corners of the display device so that the touch position and the force sensing are performed on the display screen. The method according to claim 1,
And a force sensor module in which the touch sensing data and force sensing data generated by the plurality of force sensors are transmitted to a touch IC (Integrated Circuit) through one connector pad. A bottom cover including grooves formed at four corners;
A guide panel and a backlight unit mounted inside the bottom cover;
A liquid crystal panel disposed above the guide panel; And
And a plurality of force sensors disposed between the upper portion and the lower portion of the non-display region of the liquid crystal panel at four corners of the guide panel,
Wherein the plurality of force sensors are fastened to the flexible circuit board and inserted into the bottom cover through the groove to be disposed on the guide panel. The method according to claim 6,
Grooves are arranged at four corners of the guide panel,
And the plurality of force sensors are disposed in the grooves. 8. The method of claim 7,
The flexible circuit board includes a plurality of side lines arranged at a predetermined interval in a first direction, a center line disposed between the plurality of side lines, a connector line branched at a central portion of the center line, And a plurality of extension lines extending in the horizontal direction at upper and lower portions of each of the plurality of side lines,
Wherein the side line, the center line, and the connector line are disposed on a back surface of the cover bottom. 9. The method of claim 8,
Wherein the plurality of extension lines include a plurality of force sensor supports on which the plurality of force sensors are disposed and a plurality of bending portions disposed between the plurality of force sensor supports and the plurality of side lines,
Wherein the plurality of bending portions are bent so as to surround an outer side of the cover bottom. 10. The method of claim 9,
The bending portion is bent by 90 degrees to come into contact with the side wall of the cover bottom,
Wherein the bending portion is further bent by 90 degrees so that the force sensor support portion and the force sensor are inserted into the cover bottom through the groove of the cover bottom. 11. The method of claim 10,
And an adhesive layer for fixing the force sensor supporter to the groove of the guide panel.

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