CN202678166U - Button touch feeling improving structure - Google Patents

Abstract

The button tactility improvement structure provided by the utility model includes a button, a supporting rubber arranged at the bottom of the button and supporting the button, and the supporting rubber is composed of a supporting body, supporting columns arranged on both sides of the supporting body, and two ends of the supporting rubber. A pair of elastic arms respectively connected to the supporting body and the supporting column are formed, and the bottom end of the supporting body is separated from the metal membrane switch by a predetermined distance.

Description

Button tactile improvement structure

technical field

The utility model relates to a key touch improvement structure, in particular to a key touch improvement structure for improving the pressing touch of keys of products such as mobile phones.

Background technique

At present, the buttons of most mobile phones adopt a straight up and down pressing method. For this kind of buttons, the problems of rebound force and tactility are usually only solved by selecting support rubbers (rubbers) with different hardnesses. Generally, the higher the hardness, the better the rebound force, but it will also increase the maximum force of pressing the button, and the tactile ratio will be worse, which has certain limitations.

FIG. 1 is a cross-sectional view of a mounting structure of a conventional straight-up-direct-down key, and FIG. 2 is a cross-sectional view of a supporting rubber structure of a conventional key. As shown in FIG. 1 , the button 1 is arranged on the upper part of the supporting rubber 3 and exposes the pressing surface from the installation hole of the casing 2 . In the structure described above, the bottom end (protrusion) 4 of the supporting rubber 3 contacts the metal membrane switch (DOME Sheet) 4 arranged on the top of the PCB, and when the button 1 is pressed, the conductive base of the button presses down the metal membrane switch 4 Until it reaches the deformation limit, when the pressure applied to the key 1 is removed, the metal membrane switch 4 and the supporting rubber 3 restore the deformation amount, so that the key 1 returns to its original state.

Under the action of external force, this structure can only improve its tactility by changing the elastic properties of the supporting rubber, but the better the tactility, the worse the rebound force. If the rebound force is too weak, the keys are easily stuck in the shell, so the keys are very Difficult to achieve optimal tactile ratio.

Utility model content

The utility model is proposed in order to solve the above-mentioned problems, and its purpose is to provide a structure for improving the tactile feeling of keys with a simple structure and without increasing costs.

The button tactility improvement structure provided by the utility model includes a button, a supporting rubber arranged at the bottom of the button and supporting the button, and the supporting rubber is composed of a supporting body, supporting columns arranged on both sides of the supporting body, and two ends of the supporting rubber. A pair of elastic arms respectively connected to the supporting body and the supporting column constitute.

Moreover, the bottom end of the supporting body is spaced a predetermined distance away from the metal membrane switch.

Moreover, one end of the elastic arm connected to the support column is higher than the end connected to the support main body.

Moreover, the elastic arm forms a shape with both ends inclined upward relative to the horizontal plane.

Moreover, the width of the elastic arm is uniform.

Moreover, the supporting body, the supporting column and the pair of elastic arms are integrally formed.

According to the present invention, it is possible to provide a key tactile improvement structure with a simple structure and without increasing costs.

Description of drawings

FIG. 1 is a cross-sectional view of a conventional straight-up-down-type button installation structure.

FIG. 2 is a cross-sectional view showing the structure of a conventional key support rubber.

Fig. 3 is a cross-sectional view showing the improved structure of the button touch of the present invention.

Fig. 4 is a force-displacement curve diagram of the structure for improving the tactility of keys of the present invention.

(a), (b), (c) and (d) of Fig. 5 respectively represent the schematic diagrams of the structural changes of the button tactile improvement structure of the present invention corresponding to different stages of force.

Detailed ways

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Fig. 3 is a cross-sectional view showing the improved structure of the button touch of the present invention.

As shown in FIG. 3 , the button tactility improvement structure includes a button 11, a support rubber 13 arranged at the bottom of the button 11 to support the button 11, and the support rubber 13 is composed of a support body 14, support columns 16 arranged on both sides of the support body 14, two The ends are respectively connected to a pair of elastic arms 15 of the support body 14 and the support column 16, and the bottom end of the support body 14 is separated from the metal membrane switch by a predetermined distance.

In the present invention, the end of the elastic arm 15 connected to the support column 16 is higher than the end connected to the support body 14 , thus forming a shape with both ends inclined upward relative to the horizontal plane.

Moreover, in the present invention, the supporting body 14, the supporting column 16, and the pair of elastic arms 15 are integrally formed, but the present invention is not limited thereto.

Moreover, in the present invention, the width of the elastic arm 15 is uniform, but the present invention is not limited thereto.

Generally, relevant factors affecting the tactile sensation include the force applied to the key 11 , the restoring force and the displacement of the key 11 . The utility model changes the structure of the supporting rubber 13 at the bottom of the key 11, and adds an elastic arm structure in the supporting rubber 13, thereby changing the relationship between the acting force and the restoring force of the key 11 to achieve the best tactile ratio.

When the button 11 is pressed down, the supporting column 16 and the elastic arm 15 of the supporting rubber 13 are elastically deformed, and the bottom end of the supporting body 14 is lowered. When the bottom end of the supporting body 14 contacts the metal membrane switch and acts on the button 11 When the force is the same as the restoring force, the button 11 is fully pressed and no downward displacement occurs.

From the start of pressing the button 11 until the button 11 is fully pressed, the force analysis of the button can refer to FIG. 4 . Fig. 4 is a force-displacement curve diagram of the structure for improving the tactility of keys of the present invention.

As shown in Figure 4, when the force F is applied to the button 11, the support column 16 and the elastic arm 15 of the rubber 13 are elastically deformed, so that the button 11 starts to move, and the displacement of the button 11 corresponds to the support column 16 and the elastic arm. 15 The amount of elastic deformation produced in the vertical direction. When the force acting on the key 11 reaches Fp, the support column 16 is almost no longer deformed, and the key 11 moves a distance equivalent to the displacement S1. During this process, the restoring force F _R generated due to the elastic deformation of the supporting rubber 13 also varies with the magnitude of the acting force.

When the force continues to be applied after the force reaches Fp, the force gradually decreases according to the elastic deformation of the elastic arm 15. When the bottom end of the support body 14 touches the metal membrane switch, that is, the key 11 moves equivalent to the displacement S2 At a distance of , the force decreases to Fc. During this process, the restoring force generated by the elastic deformation of the elastic arm 15 also varies with the magnitude of the acting force. When the acting force decreases to Fc, the restoring force decreases to F _R . Here, considering the touch, the difference between the acting force Fc and the restoring force _FR is approximately equal to (20±10)g.

After the bottom end of the supporting body 14 touches the metal membrane switch, according to the deformation of the elastic arm 15 and the metal membrane switch, the key 11 continues to move downward until the force acting on the key is equal to the restoring force _FR .

In the present invention, the touch ratio Snap can be calculated according to the following formula, that is,

${\mathrm{<span\; class="notranslate">\; S</span>}}_{\mathrm{<span\; class="notranslate">\; nap</span>}}<span\; class="notranslate">\; =</span>\frac{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; Fp</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; Fc</span>}<span\; class="notranslate">\; )</span>}{\mathrm{<span\; class="notranslate">\; Fp</span>}}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; 100</span>}<span\; class="notranslate">\; \%</span>$

(a), (b), (c) and (d) of Fig. 5 respectively represent the schematic diagrams of the structural changes of the button tactile improvement structure of the present invention at different stages of stress.

As shown in FIG. 5( a ), when the active force acting on the key 11 is zero F0, the structure for improving the tactility of the key does not change.

As shown in FIG. 5( b ), when the force acting on the key 11 is Fp, the key 11 moves downward by a displacement S1 .

As shown in FIG. 5( c ), when the force acting on the key 11 is Fc, the key 11 moves downward by a displacement S2, and the bottom end of the supporting rubber 13 contacts the metal membrane switch.

As shown in Figure 5(d), when the force acting on the key 11 is infinitely increased by F _∞ , since the supporting rubber 13 and the metal membrane switch are supported by the PCB, the restoring force also increases infinitely, so when acting on the key 11 When the active force is the same as the restoring force, the structure for improving the tactile feeling of the keys will no longer change.

When the active force acting on the key 11 is withdrawn, the key 11 returns to its original position according to the restoring force received by the key 11 .

Here, the thickness of the elastic arm should not be too thick, otherwise the restoring force will be too large and the tactile feeling will be damaged. The thickness of the elastic arm can be appropriately determined according to the specific case size.

As mentioned above, the utility model changes the structure of the supporting rubber arranged at the bottom of the key, and adds an elastic arm structure in the supporting rubber, so as to change the relationship between the acting force and the restoring force of the key, so as to achieve the best tactile ratio .

The utility model can be applied to various electronic products, such as mobile phones and computers, which require the tactility of keys.

Claims (6)

1. button touch feeling improving structure, it is characterized in that, comprise button, be arranged on described button bottom and support the support rubber of described button, described support rubber is made of a pair of elastic arm that supportive body, the support column that is arranged on the both sides of supportive body, two ends are connected to described supportive body and described support column.

2. button touch feeling improving structure according to claim 1 is characterized in that, the bottom of described supportive body is from metal dome switches interval preset distance.

3. button touch feeling improving structure according to claim 1 is characterized in that, the end that described elastic arm is connected in described support column is higher than an end that is connected in described supportive body.

4. button touch feeling improving structure according to claim 3 is characterized in that, described elastic arm with respect to the horizontal plane forms the acclivitous shape in two ends.

5. button touch feeling improving structure according to claim 3 is characterized in that, the width of described elastic arm is even.

6. button touch feeling improving structure according to claim 1 is characterized in that, described supportive body, described support column and described a pair of elastic arm are integrally formed.

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