TWI610323B - Key switch structure capable of providing tactile feeling - Google Patents

Abstract

A button structure includes a bottom plate, a circuit board, a shell member, a plunger member, a first elastic member and a second elastic member. The circuit board is disposed on the bottom plate and has a switch, and the shell member is mounted. The plunger member is movably disposed in the housing member and is adjacent to or away from the bottom plate, and the first elastic member is disposed between the bottom plate and the plunger member for driving the plunger The second elastic member is mounted to the plunger member and is adjacent to or away from the bottom plate, and the second elastic member has a second elastic member lower end portion corresponding to the switch. Wherein, when the plunger member is close to the trigger position relative to the bottom plate, the lower end portion of the second elastic member triggers the switch.

Description

Button structure that provides a light touch

The present invention relates to a button structure, and more particularly to a button structure that provides a light touch.

Recently, keyboards have become a common input tool, and a plurality of buttons are provided on the keyboard to provide user presses for inputting characters, numbers, symbols, and the like. Depending on the specifications of the different products, some buttons are designed to provide the user with a tactile feeling when using the buttons, and the ease of assembly of the buttons with light touch is also important for manufacturing. index parameter. Therefore, how to design a button that provides a light touch and is easy to assemble has become an issue that the industry has to work hard.

The present invention provides a button structure that provides a light touch to solve the above problems.

In order to achieve the above object, the present invention discloses a button structure capable of providing a light touch, comprising a bottom plate, a circuit board, a shell member, a plunger member, a first elastic member and a second elastic member, the circuit board Provided on the bottom plate and having a switch, the cover member is detachably and rotatably mounted on the bottom plate, the plunger member is movably disposed in the case member and can be adjacent to or away from the bottom plate, the first elasticity a piece is disposed between the bottom plate and the plunger member, the first elastic member has an upper end portion of the first elastic member abutting the plunger member to drive the plunger member away from the bottom plate, and the second elastic member is mounted The second elastic member has a second elastic member lower end portion corresponding to the switch, and the plunger member is adjacent to or away from the bottom plate. Wherein, when the plunger member is close to the trigger position relative to the bottom plate, the lower end portion of the second elastic member triggers the switch.

According to one embodiment of the present invention, the present invention further includes a first assembly slot formed on the bottom plate, the button structure further comprising a positioning arm and a first fixing leg extending from the bottom plate and located at the first The first fixing leg is connected to the shell member and is movably disposed in the first assembly slot. The first fixing leg is rotated when the shell member is rotated to a first position in a first direction. The first fixing groove is disengaged from the first assembly groove, and the case member is detached from the bottom plate. When the case member is rotated to a second position in a second direction opposite to the first direction, the first fixing leg is engaged with the first fixing leg. An assembly slot and the positioning arm stops the first fixing leg from rotating in the first direction to fix the shell member to the bottom plate.

According to one embodiment of the present invention, the present invention further provides a button structure capable of providing a light touch, comprising a bottom plate, a circuit board, a shell member, a plunger member, a first elastic member and a second An elastic member, the circuit board is disposed on the bottom plate and has a switch, the shell member is detachably and rotatably mounted on the bottom plate, the shell member has a stopper, and the plunger member is movably disposed on the bottom plate member The first elastic member is disposed between the bottom plate and the plunger member, and the first elastic member has an upper end portion of the first elastic member abutting the plunger member to drive The plunger member is remote from the bottom plate, the second elastic member is mounted to the plunger member and can be adjacent or away from the bottom plate with the plunger member, and the second elastic member has a lower end portion of a second elastic member corresponding to the switch The lower end of the second elastic member abuts the stopper. Wherein, when the plunger member is close to the collapsed position relative to the bottom plate, the second elastic member drives the lower end portion of the second elastic member to be offset from the stopper and drives the lower end portion of the second elastic member to strike and trigger the switch .

According to one embodiment of the present invention, the circuit board is a thin film circuit board, the switch is a membrane switch, and the button structure further comprises a triggering member mounted on the lower end of the second elastic member. The triggering member has a triggering abutting portion and a triggering member triggering portion, the triggering member abutting portion abutting against the blocking block, when the plunger member is brought closer to the collapsed position relative to the bottom plate by the abutting position, The second elastic member drives the trigger member to be offset from the stopper and drives the trigger member to strike the membrane switch to trigger the membrane switch.

In summary, the present invention utilizes a rotational fit between the fixed leg of the button structure and the assembly slot, so that the cover member of the button structure is detachably mounted on the bottom plate to increase the convenience of the button structure during assembly, and the present invention In addition, the lower end portion of the second elastic member of the second elastic member hits the switch of the circuit board in the trigger state to feedback the user's light touch feeling, and simultaneously triggers the switch to achieve the purpose of input. The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the embodiments of the invention.

The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only directions referring to the additional drawings. Therefore, the directional terminology used is for the purpose of illustration and not limitation. Referring to FIG. 1 and FIG. 2, FIG. 1 is a schematic view showing the appearance of a key structure 1000 according to a first embodiment of the present invention, and FIG. 2 is a schematic exploded view of the key structure 1000 according to the first embodiment of the present invention. As shown in FIG. 1 and FIG. 2, the button structure 1000 includes a bottom plate 1, a circuit board 2, and a case member 3. The circuit board 2 is disposed on the bottom plate 1 and has a switch 20, and the case member 3 is detachable and rotatable. The ground is mounted on the bottom plate 1. In this embodiment, the circuit board 2 can be a thin film circuit board, and the switch 20 can be a membrane switch. In addition, a first assembly slot 10 is formed on the bottom plate 1. The button structure 1000 further includes a positioning arm 11 and a first fixing leg 30. The positioning arm 11 extends from the bottom plate 1 and is located in the first assembly slot 10. The first fixing leg 30 is coupled to the case member 3 and movably disposed within the first assembly slot 10. Further, the first fixing leg 30 includes a first connecting rib 301 and a first engaging rib 302. The first connecting rib 301 is coupled to the shell member 3, and the first engaging rib 302 protrudes from the first connecting rib 301.

In addition, a second assembly slot 12, a third assembly slot 13 and a fourth assembly slot 14 are formed on the bottom plate 1. The button structure 1000 further includes a second fixing leg 31 and a third fixing leg 32. a fourth fixing leg 33, a second fixing leg 31, a third fixing leg 32 and a fourth fixing leg 33 are respectively connected to the case member 3 and are respectively movably disposed in the second assembly groove 12, the third assembly groove 13 and the first The four assembly slots 14 are inside. Further, the second fixing leg 31 includes a second connecting rib 310 connected to one of the shell members 3 and a second engaging rib 311 protruding from the second connecting rib 310. The third fixing leg 32 includes a connecting member. a third connecting rib 320 and a third engaging rib 321 protruding from the third connecting rib 320. The fourth fixing leg 33 includes a fourth connecting rib 330 connected to the shell member 3 and protruding from the fourth connecting portion. One of the ribs 330 has a fourth engaging rib 331.

Referring to FIG. 1 to FIG. 4 , FIG. 3 is a top plan view showing the button structure 1000 in a first state according to the first embodiment of the present invention, and FIG. 4 is a second state of the button structure 1000 according to the first embodiment of the present invention. A schematic view of the top. As shown in FIGS. 1 to 4, when the key structure 1000 is attached to one of the assembled positions as shown in FIG. 1 from one of the separated positions shown in FIG. 2, the first fixed leg 30 and the second fixed leg 31 are attached. The third fixing leg 32 and the fourth fixing leg 33 are respectively inserted into the first assembly groove 10, the second assembly groove 12, the third assembly groove 13 and the fourth assembly groove 14 on the bottom plate 1, that is, the case member 3 at this time Is in a first position as shown in FIG. 3, and then when the case member 3 is rotated from a first position shown in FIG. 3 in a second direction R2 to a second position as shown in FIG. The positioning arm 11 abuts the first connecting rib 301 , and the first engaging rib 302 is engaged with the bottom wall 101 of the first assembly slot 10 , so that the first fixing leg 30 can be engaged with the first assembly slot 10 . At this time, the positioning arm 11 can prevent the first fixing leg 30 from rotating in a first direction R1, wherein the first direction R1 is opposite to the second direction R2. At the same time, the second engaging rib 311 is engaged with the bottom wall 120 of the second assembly groove 12, so that the second fixing leg 31 is engaged with the second assembly groove 12, and the third engaging rib 321 is engaged with the third assembly groove. The bottom wall 130 of the third fixing leg 32 is engaged with the third assembling groove 13 , and the fourth engaging rib 331 is engaged with the bottom wall 140 of the fourth assembling groove 14 to engage the fourth fixing leg 33 . In the fourth assembly slot 14. In this way, the case member 3 can be fixed to the bottom plate 1.

In this embodiment, the positioning arm 11 is formed with a positioning groove 110, and the first connecting rib 301 has a positioning post 303 (as shown in FIG. 3 and FIG. 4). When the shell member 3 is rotated as shown in FIG. In the second position shown, the positioning post 303 is engaged in the positioning groove 110, so that the first fixing leg 30 can be more firmly fixed in the first assembly groove 10. The structural design of the present invention for fixing the first fixing leg 30 in the first assembly groove 10 is not limited to the embodiment shown in the drawings, and depends on actual needs.

On the contrary, when the case member 3 is rotated from the second position shown in FIG. 4 in the first direction R1 to the first position as shown in FIG. 3, the positioning arm 11 pushes the first connecting rib 301 to force the first The engaging rib 302 is disengaged from the first assembling groove 10, whereby the first fixing leg 30 can be disengaged from the first assembling groove 10 to disassemble the case member 3 to the bottom plate 1, and at the same time, the second engaging rib 311 is separated from the second The bottom wall 120 of the slot 12 is assembled, so that the second fixing leg 31 can be disengaged from the second assembly slot 12, and the third engaging rib 321 is separated from the bottom wall 130 of the third assembly slot 13, so that the third fixing leg 32 can be assembled by the third assembly. The slot 13 is disengaged, and the fourth engaging rib 331 is separated from the bottom wall 140 of the fourth assembly slot 14 so that the fourth fixing leg 33 can be disengaged from the fourth assembly slot 14. In this way, the shell member 3 of the button structure 1000 can be detachably mounted on the bottom plate 1 by the rotational fit between the fixing leg and the assembly groove to increase the convenience of the button structure 1000 during assembly.

Referring to FIG. 5 to FIG. 7 , FIG. 5 is a cross-sectional view showing a key structure 1000 in an initial state according to a first embodiment of the present invention, and FIG. 6 is a collapsed state of the key structure 1000 according to the first embodiment of the present invention. FIG. 7 is a cross-sectional view showing the key structure 1000 of the first embodiment of the present invention in a triggered state. As shown in FIG. 5 to FIG. 7 , the button structure 1000 further includes a plunger member 4 , a first elastic member 5 , a second elastic member 6 , a trigger member 7 and a key cap 8 , and the shell member 3 . With a stopper 34, the plunger member 4 is movably disposed in the casing member 3, and the keycap 8 is coupled to the plunger member 4 to provide a user pressing, thereby allowing the plunger member 4 to be adjacent to the bottom plate 1, that is, when When the key cap 8 is pressed by the user, the key cap 8 can drive the plunger member 4 to approach the bottom plate 1 along a first vertical direction Y1. The first elastic member 5 is disposed between the bottom plate 1 and the plunger member 4, and the first elastic The piece 5 has a first elastic member upper end portion 50, and the first elastic member upper end portion 50 abuts against the plunger member 4, so that the first elastic member 5 can be used to drive the plunger member 4 away from the bottom plate 1, that is, when the key cap 8 is used When released, the first elastic member 5 can drive the plunger member 4 away from the bottom plate 1 in a second perpendicular direction Y2 opposite to the first vertical direction Y1, whereby the plunger member 4 can be released after the key cap 8 is released. It is reset away from the bottom plate 1.

In addition, the second elastic member 6 is mounted on the plunger member 4 and can be adjacent to or away from the bottom plate 1 with the plunger member 4, and the second elastic member 6 has a switch 20 corresponding to the circuit board 2 (ie, the thin film circuit board) (ie, the The lower end portion 60 of the second elastic member of the membrane switch is mounted on the lower end portion 60 of the second elastic member. The trigger member 7 has a trigger abutting portion 70 and a trigger trigger portion 71. The trigger member abuts The portion 70 is for abutting against the stopper 34 of the case member 3 so that the second elastic member lower end portion 60 can abut against the stopper 34. In this embodiment, the first elastic member 5 and the second elastic member 6 are respectively a spring. Further, the second elastic member 6 has a second elastic member upper end portion 61 opposite to the second elastic member lower end portion 60. The plunger member 4 has a first positioning post 40 and a first guiding structure 41, and a second The upper end portion 61 of the elastic member is sleeved on the first positioning post 40, and the triggering member 7 includes a single body 72, a second positioning post 73 and a second guiding structure 74. The body 72 has a top surface 720 and a bottom surface. 721, the trigger triggering portion 71 protrudes from the bottom surface 721, the trigger abutting portion 70 is connected to one side of the body 72, the second positioning post 73 protrudes from the top surface 720, and the second elastic member lower end portion 60 is sleeved at the second surface The positioning post 73 is disposed, whereby the second elastic member 6 can connect the plunger member 4 and the trigger member 7, and the second guiding structure 74 is disposed on the trigger abutting portion 70. In this embodiment, the first guiding structure 41 and the second guiding structure 74 are respectively a bevel structure.

When the keycap 8 is pressed to cause the plunger member 4 to be brought closer to the bottom plate 1 by a position as shown in Fig. 5 to a collapsed position as shown in Fig. 6, the second guiding structure 74 of the triggering member 7 For engaging with the first guiding structure 41 of the plunger member 4, the triggering member 7 is moved in a traverse direction X1, thereby guiding the triggering abutment portion 70 of the triggering member 7 to be offset from the stopper of the casing member 3. 34, that is, when the plunger member 4 is brought closer to the bottom plate 1 by the initial position as shown in Fig. 1, since the trigger member 7 is stopped by the stopper 34, the second elastic member 6 is biased by the plunger member 4 The triggering member 7 is pressed to apply the second elastic member 6 to the triggering member 7 in an external force parallel to the first vertical direction Y1, and when the plunger member 4 is moved to the collapsed position as shown in FIG. 6, the second guiding member The guiding structure 74 cooperates with the first guiding structure 41 to push the triggering member 7 to move in the traverse direction X1 until the triggering member 7 moves in the traverse direction X1 until the triggering member 7 is separated from the blocking member 34, the triggering member 7 No longer blocked by the stopper 34. At this time, the external force applied by the second elastic member 6 to the trigger member 7 parallel to the first vertical direction Y1 drives the trigger member 7 to move along the first vertical direction Y1. The driving trigger 7 reaches a triggering position as shown in FIG. 7, at which time the trigger triggering portion 71 of the triggering member 7 hits the switch 20 (ie, the membrane switch) of the circuit board 2 (ie, the thin film circuit board), and The impact of the trigger triggering portion 71 with the circuit board 2 can feedback the user a tactile feeling and trigger the switch 20 (ie, the membrane switch).

Please refer to FIG. 8. FIG. 8 is a cross-sectional view showing a button structure 2000 according to a second embodiment of the present invention. As shown in FIG. 8, the main difference between the button structure 2000 and the button structure 1000 is that a second elastic member 6' of the button structure 2000 is a spring and is made of a metal material, and a circuit board of the button structure 2000. 2' is a printed circuit board, a switch 20' of the circuit board 2' includes a first electrical contact 201 and a second electrical contact 202, and a lower end of a second elastic member of the second elastic member 6' The portion 60' is directly abutted against the stopper 34 of the case member 3, that is, the button structure 2000 does not have the component configuration of the trigger member. When the button structure 2000 is in a triggered state, the lower end portion 60' of the second elastic member is impacted and The first electrical contact 201 and the second electrical contact 202 are turned on to trigger the switch 20'. The components of the embodiment having the same reference numerals as in the above embodiments have the same structural design and function principle, and are not described herein for brevity.

Please refer to FIG. 9. FIG. 9 is a cross-sectional view showing a button structure 3000 according to a third embodiment of the present invention. As shown in FIG. 9 , the main difference between the button structure 3000 and the button structure 2000 is that a second elastic member lower end 60 ′ of a second elastic member 6 ′ of the button structure 3000 has a triggering portion 601 and The abutting portion 602 protrudes from the trigger portion 601 and abuts against the stopper 34 of the case member 3 . The components of the embodiment having the same reference numerals as in the above embodiments have the same structural design and function principle, and are not described herein for brevity.

Referring to FIG. 10, FIG. 10 is a cross-sectional view showing a key structure 5000 according to a fifth embodiment of the present invention. As shown in FIG. 10, the main difference between the button structure 5000 and the aforementioned button structure 2000 is that a shell member 3' of the button structure 5000 does not have a structural configuration of the stopper, and the second elastic member 6' of the button structure 5000 The second elastic member lower end portion 60' is suspended on the circuit board 2', that is, the second elastic member lower end portion 60' of the second elastic member 6' of the button structure 5000 has a gap between the second elastic member 6' and the circuit board 2'. When the 5000 is in a triggering state, the second elastic member lower end portion 60' of the second elastic member 6' turns on the first electrical contact 201 and the second electrical contact 202 of the switch 20' to trigger the switch 20'. The components of the embodiment having the same reference numerals as in the above embodiments have the same structural design and function principle, and are not described herein for brevity.

Please refer to FIG. 11. FIG. 11 is a cross-sectional view showing a button structure 6000 according to a sixth embodiment of the present invention. As shown in FIG. 11, the main difference between the button structure 6000 and the button structure 5000 is that the circuit board 2 of the button structure 6000 is a thin film circuit board, the switch 20 of the circuit board 2 is a membrane switch, and the button structure 6000 is another. The triggering member 7' is mounted on the second elastic member lower end portion 60' of the second elastic member 6', and the triggering member 7' is suspended on the circuit board 2, that is, the triggering member 7' of the button structure 6000 and the circuit There is a gap between the plates 2, and when the button structure 6000 is in a triggered state, the triggering member 7' is pressed against the switch 20, so that the second elastic member lower end portion 60' of the second elastic member 6' triggers the switch 20. The components of the embodiment having the same reference numerals as in the above embodiments have the same structural design and function principle, and are not described herein for brevity. Compared with the prior art, the present invention utilizes a rotary fit between the fixing leg of the button structure and the assembly slot, so that the shell member of the button structure is detachably mounted on the bottom plate to increase the convenience of the button structure during assembly, and In the invention, the lower end portion of the second elastic member of the second elastic member hits the switch of the circuit board in the trigger state to feedback the user's light touch feeling, and simultaneously triggers the switch to achieve the purpose of input. The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

1000, 2000, 3000, 5000, 6000‧‧‧ button structure
1‧‧‧floor
10‧‧‧First assembly slot
101‧‧‧ bottom wall
11‧‧‧ positioning arm
110‧‧‧ positioning groove
12‧‧‧Second assembly slot
120‧‧‧ bottom wall
13‧‧‧ Third assembly slot
130‧‧‧ bottom wall
14‧‧‧fourth assembly slot
140‧‧‧ bottom wall
2, 2'‧‧‧ boards
20, 20'‧‧‧ switch
201‧‧‧First electrical contact
202‧‧‧Second electrical contacts
3, 3'‧‧‧ shell parts
30‧‧‧First fixed foot
301‧‧‧First connecting rib
302‧‧‧First engagement rib
303‧‧‧Positioning column
31‧‧‧Second fixed foot
310‧‧‧Second connection rib
311‧‧‧Second engaging rib
32‧‧‧ third fixed foot
320‧‧‧ third connecting rib
321‧‧‧3rd rib
33‧‧‧Four fixed feet
330‧‧‧fourth connecting rib
331‧‧‧4th rib
34‧‧‧blocks
4‧‧‧Plunger parts
40‧‧‧First positioning column
41‧‧‧First guiding structure
5‧‧‧First elastic parts
50‧‧‧The upper end of the first elastic member
6, 6', 6''‧‧‧ second elastic parts
60, 60', 60'' ‧ ‧ the lower end of the second elastic member
601‧‧‧Trigger
602‧‧‧Apartment
61‧‧‧The upper end of the second elastic member
7, 7'‧‧‧ triggers
70‧‧‧Tear part abutment
71‧‧‧Trigger triggering section
72‧‧‧ body
720‧‧‧ top surface
721‧‧‧ bottom
73‧‧‧Second positioning post
74‧‧‧Second guiding structure
8‧‧‧Key Cap
R1‧‧‧ first direction
R2‧‧‧ second direction
Y1‧‧‧ first vertical direction
Y2‧‧‧ second vertical direction
X1‧‧‧ traverse direction

Fig. 1 is a schematic view showing the appearance of a key structure of a first embodiment of the present invention. Fig. 2 is a schematic exploded view of the key structure of the first embodiment of the present invention. FIG. 3 is a top plan view showing the key structure of the first embodiment of the present invention in a first state. Figure 4 is a top plan view showing the key structure of the first embodiment of the present invention in a second state. Fig. 5 is a cross-sectional view showing the key structure of the first embodiment of the present invention in an initial state. Figure 6 is a cross-sectional view showing the key structure of the first embodiment of the present invention in a collapsed state. Figure 7 is a cross-sectional view showing the key structure of the first embodiment of the present invention in a triggered state. Figure 8 is a cross-sectional view showing the key structure of the second embodiment of the present invention. Figure 9 is a cross-sectional view showing a key structure of a third embodiment of the present invention. Figure 10 is a cross-sectional view showing a key structure of a fifth embodiment of the present invention. Figure 11 is a cross-sectional view showing a key structure of a sixth embodiment of the present invention.

1000‧‧‧Key structure

1‧‧‧floor

2‧‧‧ boards

20‧‧‧ switch

3‧‧‧Shell

30‧‧‧First fixed foot

31‧‧‧Second fixed foot

34‧‧‧blocks

4‧‧‧Plunger parts

40‧‧‧First positioning column

41‧‧‧First guiding structure

5‧‧‧First elastic parts

50‧‧‧The upper end of the first elastic member

6‧‧‧Second elastic parts

60‧‧‧The lower end of the second elastic member

61‧‧‧The upper end of the second elastic member

7‧‧‧trigger

70‧‧‧Tear part abutment

71‧‧‧Trigger triggering section

72‧‧‧ body

720‧‧‧ top surface

721‧‧‧ bottom

73‧‧‧Second positioning post

74‧‧‧Second guiding structure

8‧‧‧Key Cap

Y1‧‧‧ first vertical direction

Y2‧‧‧ second vertical direction

X1‧‧‧ traverse direction

Claims (17)

A button structure capable of providing a light touch feeling, comprising: a bottom plate having a first assembly groove formed thereon; a circuit board disposed on the bottom plate, the circuit board having a switch; and a shell member detachably and rotatably Mounted on the bottom plate; a plunger member movably disposed in the shell member and movable toward or away from the bottom plate; a first elastic member disposed between the bottom plate and the plunger member, the first The elastic member has an upper end portion of the first elastic member abutting the plunger member to drive the plunger member away from the bottom plate; a second elastic member is mounted to the plunger member and the plunger member is opposite to the bottom plate Close to or away from, the second elastic member has a second elastic member lower end portion corresponding to the switch; a positioning arm extending from the bottom plate and located in the first assembly groove; and a first fixing leg connected to the shell And movably disposed in the first assembly slot, when the cover member is rotated to a first position in a first direction, the first fixing leg can be disengaged from the first assembly slot, and the cover member is disassembled The bottom plate, the shell member is opposite to the first direction When the second direction is rotated to a second position, the first fixing leg is engaged with the first assembly slot and the positioning arm stops the first fixing leg from rotating in the first direction, so that the cover member is fixed to the bottom plate And wherein the lower end of the second elastic member triggers the switch when the plunger member is adjacent to the trigger plate to a trigger position. The button structure of claim 1, wherein the second elastic member is a spring and is made of a metal material, the circuit board is a printed circuit board, and the switch comprises a first electrical contact and a second An electrical contact, the lower end of the second elastic member is electrically connected to the first electrical contact and the second electrical contact to trigger the switch when the plunger member is adjacent to the triggering position. The button structure of claim 1, wherein the circuit board is a thin film circuit board, the switch is a membrane switch, and the button structure further comprises: a triggering member mounted on the lower end of the second elastic member, when When the plunger member is close to the trigger position relative to the bottom plate, the trigger member presses against the membrane switch, so that the lower end portion of the second elastic member triggers the switch. The button structure of claim 1, wherein the first fixing leg comprises: a first connecting rib connected to the shell member; and a first engaging rib protruding from the first connecting rib when the shell member When the first position is rotated, the positioning arm pushes the first connecting rib to disengage the first engaging rib from the first assembling groove, and when the shell member rotates to the second position, the positioning arm abuts The first connecting rib is connected to the first engaging rib to engage with a bottom wall of the first assembly groove. The button structure of claim 4, wherein the positioning arm is formed with a positioning groove, the first connecting rib has a positioning post, and when the shell member is rotated to the second position, the positioning post is engaged with the button Position the groove. The button structure of claim 1, wherein the bottom plate further comprises a second assembly slot, a third assembly slot and a fourth assembly slot, and the button structure further comprises: a second fixing leg connected to the The shell member is movably disposed in the second assembly groove; a third fixing leg is coupled to the shell member and movably disposed in the third assembly groove; and a fourth fixing leg coupled to the shell member And being movably disposed in the fourth assembly slot, the second fixing leg being detachable from the second assembly slot when the cover member is rotated to the first position, the third The fixing leg can be disengaged from the third assembly slot, and the fourth fixing leg can be disengaged from the fourth assembly slot. When the cover member is rotated to the second position, the second fixing leg is engaged with the second assembly slot. The third fixing leg is engaged with the third assembly slot, and the fourth fixing leg is engaged with the fourth assembly slot. The button structure of claim 6, wherein the second fixing leg comprises a second connecting rib connected to the one of the shell members and a second engaging rib protruding from the second connecting rib, the third fixing leg a third connecting rib connected to one of the shell members and a third engaging rib protruding from the third connecting rib, the fourth fixing leg comprising a fourth connecting rib connected to the shell member and protruding from a fourth engaging rib of the fourth connecting rib, when the shell member is rotated to the first position, the second engaging rib is separated from a bottom wall of the second assembling groove, and the third engaging rib is separated The bottom wall of the third assembly slot is separated from the bottom wall of the fourth assembly slot. When the cover member is rotated to the second position, the second engagement rib is engaged with The bottom wall of the second assembly groove is engaged with the bottom wall of the third assembly groove, and the fourth engagement rib is engaged with the bottom wall of the fourth assembly groove. A button structure capable of providing a light touch feeling, comprising: a bottom plate; a circuit board disposed on the bottom plate, the circuit board having a switch; a case member detachably and rotatably mounted on the bottom plate, the case member Having a stopper; a plunger member movably disposed in the housing member and being movable toward or away from the bottom plate; a first elastic member disposed between the bottom plate and the plunger member, the first elasticity a member having an upper end portion of the first elastic member abutting the plunger member to drive the plunger member away from the bottom plate; and a second elastic member mounted to the plunger member and opposite to the bottom plate with the plunger member Close to or away from, the second elastic member has a second elastic member lower end portion corresponding to the switch, and the second elastic member The lower end portion abuts the stopper; wherein, when the plunger member is close to the collapsed position relative to the bottom plate, the second elastic member drives the lower end portion of the second elastic member to be offset from the stopper and to drive the second elasticity The lower end of the piece impacts and triggers the switch. The button structure of claim 8, wherein the second elastic member is a spring and is made of a metal material, the circuit board is a printed circuit board, and the switch comprises a first electrical contact and a second An electrical contact, when the plunger member is adjacent to the bottom plate to the collapsed position, the second elastic member drives the lower end portion of the second elastic member to be offset from the stopper and drive the lower end portion of the second elastic member to collide and The first electrical contact and the second electrical contact are turned on to trigger the switch. The button structure of claim 8, wherein the second elastic member is a spring and is made of a metal material, and the lower end portion of the two elastic members has a trigger portion and an abutting portion, and the abutting portion protrudes from the a triggering portion and abutting the stop, the circuit board is a printed circuit board, the switch includes a first electrical contact and a second electrical contact, when the plunger is close to the bottom plate to the collapse In the position, the second elastic member drives the abutting portion to be offset from the stopper and drives the trigger portion to strike and electrically connect the first electrical contact and the second electrical contact to trigger the switch. The button structure of claim 8, wherein the circuit board is a thin film circuit board, the switch is a membrane switch, and the button structure further comprises: a triggering member mounted on the lower end of the second elastic member, the triggering The member has a trigger abutting portion and a triggering member triggering portion, the triggering member abutting portion abutting against the blocking block, when the plunger member is brought close to the collapsed position by the abutting position relative to the bottom plate, the first The two elastic members drive the trigger member to be offset from the stopper and drive the trigger trigger portion to strike the membrane switch to trigger the Membrane switch. The button structure of claim 11, wherein the second elastic member has a second elastic member upper end portion opposite to the lower end portion of the second elastic member and is a spring, the plunger member has a first positioning post and a first guiding structure, the upper end portion of the second elastic member is sleeved on the first positioning post, and the triggering member comprises: a body having a top surface and a bottom surface, wherein the triggering portion of the triggering member protrudes from the bottom surface The triggering abutting portion is connected to one side of the body; a second positioning post protrudes from the top surface, the lower end portion of the second elastic member is sleeved on the second positioning post; and a second guiding The structure is disposed on the trigger abutting portion for engaging with the first guiding structure to guide the trigger abutting portion to be offset from the stopper. The button structure of claim 8, wherein the bottom plate is formed with a first assembly slot, the button structure further comprising: a positioning arm extending from the bottom plate and located in the first assembly slot; and a first fixing leg Connecting to the shell member and movably disposed in the first assembly groove, when the shell member is rotated to a first position in a first direction, the first fixing leg can be detached from the first assembly groove, so that When the shell member is detached from the bottom plate, and the shell member is rotated to a second position in a second direction opposite to the first direction, the first fixing leg is engaged with the first assembly groove and the positioning arm is stopped. The first fixing leg rotates in the first direction to fix the shell member to the bottom plate. The key structure of claim 13, wherein the first fixed leg comprises: a first connecting rib connected to the shell member; and a first engaging rib protruding from the first connecting rib, the positioning arm pushing the first connecting rib when the shell member is rotated to the first position Disengaging the first engaging rib from the first assembling groove, and when the shell member is rotated to the second position, the positioning arm abuts the first connecting rib, so that the first engaging rib is engaged with the first engaging rib One of the first assembly tank bottom walls. The button structure of claim 14, wherein the positioning arm is formed with a positioning groove, the first connecting rib has a positioning post, and when the shell member is rotated to the second position, the positioning post is engaged with the button Position the groove. The button structure of claim 13, wherein a second assembly slot, a third assembly slot, and a fourth assembly slot are further formed on the bottom plate, and the button structure further includes: a second fixing leg connected to the second fixing leg The shell member is movably disposed in the second assembly groove; a third fixing leg is coupled to the shell member and movably disposed in the third assembly groove; and a fourth fixing leg coupled to the shell member And being movably disposed in the fourth assembly slot, when the cover member is rotated to the first position, the second fixing leg can be disengaged from the second assembly slot, and the third fixing leg can be disengaged from the third assembly slot. The fourth fixing leg can be disengaged from the fourth assembly slot. When the housing member is rotated to the second position, the second fixing leg is engaged with the second assembly slot, and the third fixing leg is engaged with the first fixing leg. The third assembly slot is assembled, and the fourth fixing leg is engaged with the fourth assembly slot. The button structure of claim 16, wherein the second fixing leg comprises a second connecting rib connected to the one of the shell members and a second engaging rib protruding from the second connecting rib, the third fixing leg The third connecting rib connected to one of the shell members and the third protruding from the third connecting rib a locking rib, the fourth fixing leg comprising a fourth connecting rib connected to the shell member and a fourth engaging rib protruding from the fourth connecting rib, when the shell member is rotated to the first position, The second engaging rib is separated from the bottom wall of the second assembly groove, and the third engaging rib is separated from the bottom wall of the third assembly groove, and the fourth engaging rib is separated from the fourth assembly groove. a bottom wall, when the shell member is rotated to the second position, the second engaging rib is engaged with the bottom wall of the second assembly groove, and the third engaging rib is engaged with the third assembly groove The bottom wall, and the fourth engaging rib is engaged with the bottom wall of the fourth assembly groove.